browserify-asch.js

(function(){function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s}return e})()({1:[function(require,module,exports){
window.AschJS = AschJS = require('./index.js');
},{"./index.js":2}],2:[function(require,module,exports){
module.exports = {
	basic: require("./lib/transactions/basic.js"),
	crypto : require("./lib/transactions/crypto.js"),
	dapp: require("./lib/transactions/dapp.js"),
	transfer: require("./lib/transactions/transfer.js"),
	delegate : require("./lib/transactions/delegate.js"),
	signature : require("./lib/transactions/signature.js"),
	transaction : require("./lib/transactions/transaction.js"),
	vote : require("./lib/transactions/vote.js"),
	uia: require("./lib/transactions/uia.js"),
	options: require("./lib/options.js"),
	utils: {
		slots: require("./lib/time/slots.js"),
		format: require("./lib/time/format.js")
	}
}

},{"./lib/options.js":8,"./lib/time/format.js":9,"./lib/time/slots.js":10,"./lib/transactions/basic.js":11,"./lib/transactions/crypto.js":12,"./lib/transactions/dapp.js":13,"./lib/transactions/delegate.js":14,"./lib/transactions/signature.js":15,"./lib/transactions/transaction.js":16,"./lib/transactions/transfer.js":17,"./lib/transactions/uia.js":18,"./lib/transactions/vote.js":19}],3:[function(require,module,exports){
(function (Buffer){
var sha256 = require('fast-sha256')
var RIPEMD160 = require('ripemd160')
var base58check = require('./base58check')

const NORMAL_PREFIX = 'A' // A

module.exports = {
  isAddress: function (address) {
    if (typeof address !== 'string') {
      return false
    }
    if (!/^[0-9]{1,20}$/g.test(address)) {
      if (!base58check.decodeUnsafe(address.slice(1))) {
        return false
      }
      if (['A'].indexOf(address[0]) == -1) {
        return false
      }
    }
    return true
  },

  isBase58CheckAddress: function (address) {
    if (typeof address !== 'string') {
      return false
    }
    if (!base58check.decodeUnsafe(address.slice(1))) {
      return false
    }
    if (['A'].indexOf(address[0]) == -1) {
      return false
    }
    return true
  },

  generateBase58CheckAddress: function (publicKey) {
    if (typeof publicKey === 'string') {
      publicKey = Buffer.from(publicKey, 'hex')
    }
    var h1 = sha256.hash(publicKey)
    var h2 = new RIPEMD160().update(Buffer.from(h1)).digest()
    return NORMAL_PREFIX + base58check.encode(h2)
  },
}
}).call(this,require("buffer").Buffer)
},{"./base58check":6,"buffer":24,"fast-sha256":28,"ripemd160":50}],4:[function(require,module,exports){
(function (Buffer){
// base-x encoding
// Forked from https://github.com/cryptocoinjs/bs58
// Originally written by Mike Hearn for BitcoinJ
// Copyright (c) 2011 Google Inc
// Ported to JavaScript by Stefan Thomas
// Merged Buffer refactorings from base58-native by Stephen Pair
// Copyright (c) 2013 BitPay Inc

module.exports = function base (ALPHABET) {
  var ALPHABET_MAP = {}
  var BASE = ALPHABET.length
  var LEADER = ALPHABET.charAt(0)

  // pre-compute lookup table
  for (var z = 0; z < ALPHABET.length; z++) {
    var x = ALPHABET.charAt(z)

    if (ALPHABET_MAP[x] !== undefined) throw new TypeError(x + ' is ambiguous')
    ALPHABET_MAP[x] = z
  }

  function encode (source) {
    if (source.length === 0) return ''

    var digits = [0]
    for (var i = 0; i < source.length; ++i) {
      for (var j = 0, carry = source[i]; j < digits.length; ++j) {
        carry += digits[j] << 8
        digits[j] = carry % BASE
        carry = (carry / BASE) | 0
      }

      while (carry > 0) {
        digits.push(carry % BASE)
        carry = (carry / BASE) | 0
      }
    }

    var string = ''

    // deal with leading zeros
    for (var k = 0; source[k] === 0 && k < source.length - 1; ++k) string += ALPHABET[0]
    // convert digits to a string
    for (var q = digits.length - 1; q >= 0; --q) string += ALPHABET[digits[q]]

    return string
  }

  function decodeUnsafe (string) {
    if (string.length === 0) return Buffer.allocUnsafe(0)

    var bytes = [0]
    for (var i = 0; i < string.length; i++) {
      var value = ALPHABET_MAP[string[i]]
      if (value === undefined) return

      for (var j = 0, carry = value; j < bytes.length; ++j) {
        carry += bytes[j] * BASE
        bytes[j] = carry & 0xff
        carry >>= 8
      }

      while (carry > 0) {
        bytes.push(carry & 0xff)
        carry >>= 8
      }
    }

    // deal with leading zeros
    for (var k = 0; string[k] === LEADER && k < string.length - 1; ++k) {
      bytes.push(0)
    }

    return Buffer.from(bytes.reverse())
  }

  function decode (string) {
    var buffer = decodeUnsafe(string)
    if (buffer) return buffer

    throw new Error('Non-base' + BASE + ' character')
  }

  return {
    encode: encode,
    decodeUnsafe: decodeUnsafe,
    decode: decode
  }
}

}).call(this,require("buffer").Buffer)
},{"buffer":24}],5:[function(require,module,exports){
var basex = require('./base-x.js')
var ALPHABET = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz'

module.exports = basex(ALPHABET)
},{"./base-x.js":4}],6:[function(require,module,exports){
(function (Buffer){
'use strict'

var sha256 = require('fast-sha256')
var base58 = require('./bs58.js')

// SHA256(SHA256(buffer))
function sha256x2(buffer) {
  return Buffer.from(sha256.hash(sha256.hash(buffer)))
}

// Encode a buffer as a base58-check encoded string
function encode(payload) {
  var checksum = sha256x2(payload)
  return base58.encode(Buffer.concat([
      payload,
      checksum
    ], payload.length + 4))
}

function decodeRaw(buffer) {
  var payload = buffer.slice(0, -4)
  var checksum = buffer.slice(-4)
  var newChecksum = sha256x2(payload)

  if (checksum[0] ^ newChecksum[0] |
    checksum[1] ^ newChecksum[1] |
    checksum[2] ^ newChecksum[2] |
    checksum[3] ^ newChecksum[3]) return

  return payload
}

// Decode a base58-check encoded string to a buffer, no result if checksum is wrong
function decodeUnsafe(string) {
  var buffer = base58.decodeUnsafe(string)
  if (!buffer) return

  return decodeRaw(buffer)
}

function decode(string) {
  var buffer = base58.decode(string)
  var payload = decodeRaw(buffer)
  if (!payload) throw new Error('Invalid checksum')
  return payload
}

module.exports = {
  encode: encode,
  decode: decode,
  decodeUnsafe: decodeUnsafe
}

}).call(this,require("buffer").Buffer)
},{"./bs58.js":5,"buffer":24,"fast-sha256":28}],7:[function(require,module,exports){
module.exports = {
  fees:{
    send: 10000000,
    vote: 10000000,
    delegate: 10000000000,
    secondsignature: 500000000,
    multisignature: 500000000,
    dapp: 10000000000
  },
  coin: 100000000
}

},{}],8:[function(require,module,exports){
var optionMap = {
  clientDriftSeconds: 5
}

module.exports = {
  set: function (key, val) {
    optionMap[key] = val
  },
  get: function (key) {
    return optionMap[key]
  },
  getAll: function () {
    return optionMap
  }
}
},{}],9:[function(require,module,exports){
var slots = require('./slots.js');

function timeAgo(time) {
  var d = slots.beginEpochTime();
	var t = parseInt(d.getTime() / 1000);

	time = new Date((time + t) * 1000);

	var currentTime = new Date().getTime();
	var diffTime = (currentTime - time.getTime()) / 1000;

	if (diffTime < 60) {
    return Math.floor(diffTime) + ' sec ago';
	}
	if (Math.floor(diffTime / 60) <= 1) {
    return Math.floor(diffTime / 60) + ' min ago';
	}
	if ((diffTime / 60) < 60) {
    return Math.floor(diffTime / 60) + ' mins ago';
	}
	if (Math.floor(diffTime / 60 / 60) <= 1) {
    return Math.floor(diffTime / 60 / 60) + ' hour ago';
	}
	if ((diffTime / 60 / 60) < 24) {
    return Math.floor(diffTime / 60 / 60) + ' hours ago';
	}
	if (Math.floor(diffTime / 60 / 60 / 24) <= 1) {
    return Math.floor(diffTime / 60 / 60 / 24) + ' day ago';
	}
	if ((diffTime / 60 / 60 / 24) < 30) {
    return Math.floor(diffTime / 60 / 60 / 24) + ' days ago';
	}
	if (Math.floor(diffTime / 60 / 60 / 24 / 30) <= 1) {
    return Math.floor(diffTime / 60 / 60 / 24 / 30) + ' month ago';
	}
	if ((diffTime / 60 / 60 / 24 / 30) < 12) {
    return Math.floor(diffTime / 60 / 60 / 24 / 30) + ' months ago';
	}
	if (Math.floor((diffTime / 60 / 60 / 24 / 30 / 12)) <= 1) {
    return Math.floor(diffTime / 60 / 60 / 24 / 30 / 12) + ' year ago';
	}

	return Math.floor(diffTime / 60 / 60 / 24 / 30 / 12) + ' years ago';
}

function fullTimestamp(time) {
  var d = slots.beginEpochTime();
  var t = parseInt(d.getTime() / 1000);

  d = new Date((time + t) * 1000);
  var month = d.getMonth() + 1;

  if (month < 10) {
    month = "0" + month;
  }

  var day = d.getDate();

  if (day < 10) {
    day = "0" + day;
  }

  var h = d.getHours();
  var m = d.getMinutes();
  var s = d.getSeconds();

  if (h < 10) {
    h = "0" + h;
  }

  if (m < 10) {
    m = "0" + m;
  }

  if (s < 10) {
    s = "0" + s;
  }

  return d.getFullYear() + "/" + month + "/" + day + " " + h + ":" + m + ":" + s;
}

module.exports = {
  timeAgo: timeAgo,
  fullTimestamp: fullTimestamp
}
},{"./slots.js":10}],10:[function(require,module,exports){
function getEpochTime(time) {
	if (time === undefined) {
		time = (new Date()).getTime();
	}
	var d = beginEpochTime();
	var t = d.getTime();
	return Math.floor((time - t) / 1000);
}

function beginEpochTime() {
	var d = new Date(Date.UTC(2016, 5, 27, 20, 0, 0, 0))

	return d;
}

var interval = 10,
    delegates = 101;

function getTime(time) {
	return getEpochTime(time);
}

function getRealTime(epochTime) {
	if (epochTime === undefined) {
		epochTime = getTime()
	}
	var d = beginEpochTime();
	var t = Math.floor(d.getTime() / 1000) * 1000;
	return t + epochTime * 1000;
}

function getSlotNumber(epochTime) {
	if (epochTime === undefined) {
		epochTime = getTime()
	}

	return Math.floor(epochTime / interval);
}

function getSlotTime(slot) {
	return slot * interval;
}

function getNextSlot() {
	var slot = getSlotNumber();

	return slot + 1;
}

function getLastSlot(nextSlot) {
	return nextSlot + delegates;
}

module.exports = {
	interval: interval,
	delegates: delegates,
	getTime: getTime,
	getRealTime: getRealTime,
	getSlotNumber: getSlotNumber,
	getSlotTime: getSlotTime,
	getNextSlot: getNextSlot,
	getLastSlot: getLastSlot,
	beginEpochTime: beginEpochTime
}

},{}],11:[function(require,module,exports){
var transaction = require('./transaction.js')

function calculateFee(username){
    let len = username.length
    if (len === 2) {
      return 200
    } else if (len === 3) {
      return 100
    } else if (len === 4) {
      return 80
    } else if (len === 5) {
      return 40
    } else if (len <= 10) {
      return 10
    }
    return 1
}

function setName(username, secret, secondSecret) {
	return transaction.createTransactionEx({
		type: 2,
		fee: calculateFee(username) * 1e8,
		secret: secret,
		secondSecret: secondSecret,
		args: [username]
	})
}

module.exports = {
	setName: setName
}

},{"./transaction.js":16}],12:[function(require,module,exports){
(function (Buffer){
var sha256 = require("fast-sha256");
var addressHelper = require('../address.js')

if (typeof Buffer === "undefined") {
	Buffer = require("buffer/").Buffer;
}

var ByteBuffer = require("bytebuffer");
var bignum = require("browserify-bignum");
var nacl = require('tweetnacl')

var fixedPoint = Math.pow(10, 8);

function getSignatureBytes(signature) {
	var bb = new ByteBuffer(32, true);
	var publicKeyBuffer = new Buffer(signature.publicKey, "hex");

	for (var i = 0; i < publicKeyBuffer.length; i++) {
		bb.writeByte(publicKeyBuffer[i]);
	}

	bb.flip();
	return new Uint8Array(bb.toArrayBuffer());
}

function toLocalBuffer(buf) {
  if (typeof window !== 'undefined') {
    return new Uint8Array(buf.toArrayBuffer())
  } else {
    return buf.toBuffer()
  }
}

function sha256Bytes(data) {
	return Buffer.from(sha256.hash(data))
}

function sha256Hex(data) {
	return Buffer.from(sha256.hash(data)).toString('hex')
}

function getDAppBytes(dapp) {
	try {
		var buf = new Buffer([]);
		var nameBuf = new Buffer(dapp.name, "utf8");
		buf = Buffer.concat([buf, nameBuf]);

		if (dapp.description) {
			var descriptionBuf = new Buffer(dapp.description, "utf8");
			buf = Buffer.concat([buf, descriptionBuf]);
		}

		if (dapp.tags) {
			var tagsBuf = new Buffer(dapp.tags, "utf8");
			buf = Buffer.concat([buf, tagsBuf]);
		}

		if (dapp.link) {
			buf = Buffer.concat([buf, new Buffer(dapp.link, "utf8")]);
		}

		if (dapp.icon) {
			buf = Buffer.concat([buf, new Buffer(dapp.icon, "utf8")]);
		}

		var bb = new ByteBuffer(1, true);
		bb.writeInt(dapp.type);
		bb.writeInt(dapp.category);
		bb.writeString(dapp.delegates.join(','));
		bb.writeInt(dapp.unlockDelegates);
		bb.flip();

		buf = Buffer.concat([buf, bb.toBuffer()]);
	} catch (e) {
		throw Error(e.toString());
	}

	return buf;
}

function getInTransferBytes(inTransfer) {
	try {
		var buf = new Buffer([]);
		var dappId = new Buffer(inTransfer.dappId, "utf8");
		var currency = new Buffer(inTransfer.currency, "utf8")
		buf = Buffer.concat([buf, dappId, currency]);
		if (inTransfer.currency !== 'XAS') {
			var amount = new Buffer(inTransfer.amount, "utf8")
			buf = Buffer.concat([buf, amount])
		}
	} catch (e) {
		throw Error(e.toString());
	}

	return buf;
}

function getOutTransferBytes(outTransfer) {
	try {
		var buf = new Buffer([]);
		var dappIdBuf = new Buffer(outTransfer.dappId, 'utf8');
		var transactionIdBuff = new Buffer(outTransfer.transactionId, 'utf8');
		var currencyBuff = new Buffer(outTransfer.currency, 'utf8')
		var amountBuff = new Buffer(outTransfer.amount, 'utf8')
		buf = Buffer.concat([buf, dappIdBuf, transactionIdBuff, currencyBuff, amountBuff]);
	} catch (e) {
		throw Error(e.toString());
	}

	return buf;
}

function getBytes(trs, skipSignature, skipSecondSignature) {
	var bb = new ByteBuffer(1, true);
	bb.writeInt(trs.type);
	bb.writeInt(trs.timestamp);
	bb.writeLong(trs.fee);
	bb.writeString(trs.senderId)
	if (trs.requestorId) {
		bb.writeString(trs.requestorId)
	}
	if (trs.mode) {
		bb.writeInt(trs.mode)
	}

	if (trs.message) bb.writeString(trs.message);
	if (trs.args) {
		let args
		if (typeof trs.args === 'string') {
			args = trs.args
		} else if (Array.isArray(trs.args)) {
			args = JSON.stringify(trs.args)
		}
		bb.writeString(args)
	}

	if (!skipSignature && trs.signatures) {
		for (let signature of trs.signatures) {
		  var signatureBuffer = new Buffer(signature, 'hex');
		  for (var i = 0; i < signatureBuffer.length; i++) {
		  	bb.writeByte(signatureBuffer[i]);
		  }
		}
	}

	if (!skipSecondSignature && trs.secondSignature) {
		var signSignatureBuffer = new Buffer(trs.secondSignature, 'hex');
		for (var i = 0; i < signSignatureBuffer.length; i++) {
			bb.writeByte(signSignatureBuffer[i]);
		}
	}

	bb.flip();
	return toLocalBuffer(bb);
}

function getId(transaction) {
	return sha256Hex(getBytes(transaction))
}
function getHash(transaction, skipSignature, skipSecondSignature) {
	return sha256Bytes(getBytes(transaction, skipSignature, skipSecondSignature))
}

function getFee(transaction) {
	switch (transaction.type) {
		case 0: // Normal
			return 0.1 * fixedPoint;
			break;

		case 1: // Signature
			return 100 * fixedPoint;
			break;

		case 2: // Delegate
			return 10000 * fixedPoint;
			break;

		case 3: // Vote
			return 1 * fixedPoint;
			break;
	}
}

function sign(transaction, keys) {
	var hash = getHash(transaction, true, true);
	var signature = nacl.sign.detached(hash, new Buffer(keys.privateKey, "hex"));

	return new Buffer(signature).toString("hex");
}

function secondSign(transaction, keys) {
	var hash = getHash(transaction, true, true);
	var signature = nacl.sign.detached(hash, new Buffer(keys.privateKey, "hex"));
	return new Buffer(signature).toString("hex")
}

function signBytes(bytes, keys) {
	var hash = sha256Bytes(new Buffer(bytes, 'hex'))
	var signature = nacl.sign.detached(hash, new Buffer(keys.privateKey, "hex"));
	return new Buffer(signature).toString("hex");
}

function verify(transaction) {
	var remove = 64;

	if (transaction.signSignature) {
		remove = 128;
	}

	var bytes = getBytes(transaction);
	var data2 = new Buffer(bytes.length - remove);

	for (var i = 0; i < data2.length; i++) {
		data2[i] = bytes[i];
	}

	var hash = sha256Bytes(data2)

	var signatureBuffer = new Buffer(transaction.signature, "hex");
	var senderPublicKeyBuffer = new Buffer(transaction.senderPublicKey, "hex");
	var res = nacl.sign.detached.verify(hash, signatureBuffer, senderPublicKeyBuffer);

	return res;
}

function verifySecondSignature(transaction, publicKey) {
	var bytes = getBytes(transaction);
	var data2 = new Buffer(bytes.length - 64);

	for (var i = 0; i < data2.length; i++) {
		data2[i] = bytes[i];
	}

	var hash = sha256Bytes(data2)

	var signSignatureBuffer = new Buffer(transaction.signSignature, "hex");
	var publicKeyBuffer = new Buffer(publicKey, "hex");
	var res = nacl.sign.detached.verify(hash, signSignatureBuffer, publicKeyBuffer);

	return res;
}

function verifyBytes(bytes, signature, publicKey) {
	var hash = sha256Bytes(new Buffer(bytes, 'hex'))
	var signatureBuffer = new Buffer(signature, "hex");
	var publicKeyBuffer = new Buffer(publicKey, "hex");
	var res = nacl.sign.detached.verify(hash, signatureBuffer, publicKeyBuffer);
	return res
}

function getKeys(secret) {
	var hash = sha256Bytes(new Buffer(secret))
	var keypair = nacl.sign.keyPair.fromSeed(hash);

	return {
		publicKey: new Buffer(keypair.publicKey).toString("hex"),
		privateKey: new Buffer(keypair.secretKey).toString("hex")
	}
}

function getAddress(publicKey) {
	return addressHelper.generateBase58CheckAddress(publicKey)
}

module.exports = {
	getBytes: getBytes,
	getHash: getHash,
	getId: getId,
	getFee: getFee,
	sign: sign,
	secondSign: secondSign,
	getKeys: getKeys,
	getAddress: getAddress,
	verify: verify,
	verifySecondSignature: verifySecondSignature,
	fixedPoint: fixedPoint,
	signBytes: signBytes,
	toLocalBuffer: toLocalBuffer,
	verifyBytes: verifyBytes,
	isAddress: addressHelper.isAddress,
	isBase58CheckAddress: addressHelper.isBase58CheckAddress
}

}).call(this,require("buffer").Buffer)
},{"../address.js":3,"browserify-bignum":23,"buffer":24,"buffer/":24,"bytebuffer":25,"fast-sha256":28,"tweetnacl":54}],13:[function(require,module,exports){
(function (Buffer){
var assert = require('assert')
var ByteBuffer = require('bytebuffer')
var crypto = require("./crypto.js")
var constants = require("../constants.js")
var slots = require("../time/slots.js")
var globalOptions = require('../options.js')
var transaction = require('./transaction.js')

function createDApp(options, secret, secondSecret) {
	return transaction.createTransactionEx({
		type: 200,
		fee: 100 * 1e8,
		secret: secret,
		secondSecret: secondSecret,
		args: [
			options.name,
			options.description,
			options.link,
			options.icon,
			options.delegates,
			options.unlockDelegates
		]
	})
}

function getDAppTransactionBytes(trs, skipSignature) {
	var bb = new ByteBuffer(1, true);
	bb.writeInt(trs.timestamp);
	bb.writeString(trs.fee)

	var senderPublicKeyBuffer = new Buffer(trs.senderPublicKey, 'hex');
	for (var i = 0; i < senderPublicKeyBuffer.length; i++) {
		bb.writeByte(senderPublicKeyBuffer[i]);
	}

	bb.writeInt(trs.type)

	assert(Array.isArray(trs.args))
	bb.writeString(JSON.stringify(trs.args))

	if (!skipSignature && trs.signature) {
		var signatureBuffer = new Buffer(trs.signature, 'hex');
		for (var i = 0; i < signatureBuffer.length; i++) {
			bb.writeByte(signatureBuffer[i]);
		}
	}
	bb.flip();
	return bb.toBuffer()
}

function createInnerTransaction(options, secret) {
	var keys = crypto.getKeys(secret)
	var args = options.args
	if (typeof args === 'string') args = JSON.parse(args)
	var trs = {
		fee: options.fee,
		timestamp: slots.getTime() - globalOptions.get('clientDriftSeconds'),
		senderPublicKey: keys.publicKey,
		type: options.type,
		args: args
	}
	trs.signature = crypto.signBytes(getDAppTransactionBytes(trs), keys)
	return trs
}

module.exports = {
	createDApp: createDApp,
	createInnerTransaction: createInnerTransaction
}

}).call(this,require("buffer").Buffer)
},{"../constants.js":7,"../options.js":8,"../time/slots.js":10,"./crypto.js":12,"./transaction.js":16,"assert":20,"buffer":24,"bytebuffer":25}],14:[function(require,module,exports){
var crypto = require("./crypto.js")
var constants = require("../constants.js")
var slots = require("../time/slots.js")
var options = require('../options')
var transaction = require('./transaction')

function createDelegate(secret, secondSecret) {
	return transaction.createTransactionEx({
		type: 10,
		fee: 100 * 1e8,
		args: [],
		secret: secret,
		secondSecret: secondSecret
	})
}

module.exports = {
	createDelegate : createDelegate
}

},{"../constants.js":7,"../options":8,"../time/slots.js":10,"./crypto.js":12,"./transaction":16}],15:[function(require,module,exports){
var crypto = require("./crypto.js")
var constants = require("../constants.js")
var slots = require("../time/slots.js")
var options = require('../options')

function newSignature(secondSecret) {
	var keys = crypto.getKeys(secondSecret);

	var signature = {
		publicKey: keys.publicKey
	};

	return signature;
}

function createSignature(secret, secondSecret) {
	var keys = crypto.getKeys(secret);

	var signature = newSignature(secondSecret);
	var transaction = {
		type: 1,
		amount: 0,
		fee: constants.fees.secondsignature,
		recipientId: null,
		senderPublicKey: keys.publicKey,
		timestamp: slots.getTime() - options.get('clientDriftSeconds'),
		asset: {
			signature: signature
		}
	};

	crypto.sign(transaction, keys);
	transaction.id = crypto.getId(transaction);

	return transaction;
}

module.exports = {
	createSignature: createSignature
}

},{"../constants.js":7,"../options":8,"../time/slots.js":10,"./crypto.js":12}],16:[function(require,module,exports){
var crypto = require("./crypto.js")
var constants = require("../constants.js")
var slots = require("../time/slots.js")
var options = require('../options')

function calculateFee(amount) {
	var min = constants.fees.send;
	var fee = parseFloat((amount * 0.0001).toFixed(0));
	return fee < min ? min : fee;
}

function createTransaction(recipientId, amount, message, secret, secondSecret) {
	return createTransactionEx({
		type: 1,
		fee: 0.1 * 1e8,
		args: [amount, recipientId],
		secret,
		secondSecret: secondSecret,
		message
	})
}

function createLock(height, amount, secret, secondSecret) {
	return createTransactionEx({
		type: 4,
		fee: 0.1 * 1e8,
		args: [height, amount],
		secret: secret,
		secondSecret: secondSecret
	})
}

function unlock(secret, secondSecret) {
	return createTransactionEx({
		type: 5,
		fee: 0,
		args: [],
		secret: secret,
		secondSecret: secondSecret
	})
}

function createTransactionEx(params) {
	if (!params.secret) throw new Error('Secret needed')
	let keys = crypto.getKeys(params.secret)
	let transaction = {
		type: params.type,
		timestamp: slots.getTime() - options.get('clientDriftSeconds'),
		fee: params.fee,
		message: params.message,
		args: params.args,
		senderPublicKey: keys.publicKey,
		senderId: crypto.getAddress(keys.publicKey),
		signatures: []
	}
	transaction.signatures.push(crypto.sign(transaction, keys))
	if (params.secondSecret) {
		let secondKeys = crypto.getKeys(params.secondSecret);
		transaction.secondSignature = crypto.secondSign(transaction, secondKeys);
	}
	transaction.id = crypto.getId(transaction)
	return transaction
}

function createMultiSigTransaction(params) {
	var transaction = {
		type: params.type,
		fee: params.fee,
		senderId: params.senderId,
		requestId: params.requestId,
		mode: params.mode,
		timestamp: slots.getTime() - options.get('clientDriftSeconds'),
		args: params.args
	};
	return transaction;
}

function signMultiSigTransaction(transaction, secret) {
	var keys = crypto.getKeys(secret);
	var signature = crypto.sign(transaction, keys);

	return keys.publicKey + signature;
}

module.exports = {
	createTransaction: createTransaction,
	createTransactionEx: createTransactionEx,
	calculateFee: calculateFee,
	createLock: createLock,
	unlock: unlock,
	createMultiSigTransaction: createMultiSigTransaction,
	signMultiSigTransaction: signMultiSigTransaction
}

},{"../constants.js":7,"../options":8,"../time/slots.js":10,"./crypto.js":12}],17:[function(require,module,exports){
var crypto = require("./crypto.js")
var constants = require("../constants.js")
var slots = require("../time/slots.js")
var options = require('../options')
var transaction = require('./transaction')

function createInTransfer(dappName, currency, amount, secret, secondSecret) {
	return transaction.createTransactionEx({
		type: 204,
		fee: 0.1 * 1e8,
		args: [dappName, currency, amount],
		secret,
		secondSecret: secondSecret
	})
}

function createOutTransfer(address, chain, recipient, currency, amount, wid, seq) {
	var transaction = {
		type: 205,
		fee: 10000000,
		senderId: address,
		timestamp: slots.getTime() - options.get('clientDriftSeconds'),
		args: [
			chain,
			recipient,
			currency,
			amount,
			wid,
			seq
		]
	};
	return transaction;
}

function signOutTransfer(transaction, secret) {
	var keys = crypto.getKeys(secret);
	var signature = crypto.sign(transaction, keys);

	return keys.publicKey + signature;
}

module.exports = {
	createInTransfer: createInTransfer,
	createOutTransfer: createOutTransfer,
	signOutTransfer: signOutTransfer
}
},{"../constants.js":7,"../options":8,"../time/slots.js":10,"./crypto.js":12,"./transaction":16}],18:[function(require,module,exports){
var ByteBuffer = require('bytebuffer')
var crypto = require("./crypto.js")
var constants = require("../constants.js")
var slots = require("../time/slots.js")
var options = require('../options')
var transaction = require('./transaction')

function createIssuer (name, desc, secret, secondSecret) {
	return transaction.createTransactionEx({
		type: 100,
		fee: 100 * 1e8,
		args: [ name, desc ],
		secret: secret,
		secondSecret: secondSecret
	})
}

function createAsset(name, desc, maximum, precision, secret, secondSecret) {
	return transaction.createTransactionEx({
		type: 101,
		fee: 500 * 1e8,
		args: [ name, desc, maximum, precision ],
		secret: secret,
		secondSecret: secondSecret
	})
}


function createIssue(currency, amount, secret, secondSecret) {
	return transaction.createTransactionEx({
		type: 102,
		fee: 0.1 * 1e8,
		args: [ currency, amount ],
		secret: secret,
		secondSecret: secondSecret
	})
}

function createTransfer(currency, amount, recipientId, message, secret, secondSecret) {
	return transaction.createTransactionEx({
		type: 103,
		fee: 0.1 * 1e8,
		args: [currency, amount, recipientId],
		secret,
		secondSecret,
		message
	})
}

module.exports = {
	createIssuer: createIssuer,
	createAsset: createAsset,
	createIssue: createIssue,
	createTransfer: createTransfer
}

},{"../constants.js":7,"../options":8,"../time/slots.js":10,"./crypto.js":12,"./transaction":16,"bytebuffer":25}],19:[function(require,module,exports){
var crypto = require("./crypto.js")
var constants = require("../constants.js")
var slots = require("../time/slots.js")
var options = require('../options')
var transaction = require('./transaction')

function createVote(keyList, secret, secondSecret) {
return transaction.createTransactionEx({
		type: 11,
		fee: 0.1 * 1e8,
		args: keyList,
		secret: secret,
		secondSecret: secondSecret
	})
}

function deleteVote(keyList, secret, secondSecret) {
	return transaction.createTransactionEx({
		type: 12,
		fee: 0.1 * 1e8,
		args: keyList,
		secret: secret,
		secondSecret: secondSecret
	})
}

module.exports = {
	createVote: createVote,
	deleteVote: deleteVote
}

},{"../constants.js":7,"../options":8,"../time/slots.js":10,"./crypto.js":12,"./transaction":16}],20:[function(require,module,exports){
(function (global){
'use strict';

// compare and isBuffer taken from https://github.com/feross/buffer/blob/680e9e5e488f22aac27599a57dc844a6315928dd/index.js
// original notice:

/*!
 * The buffer module from node.js, for the browser.
 *
 * @author   Feross Aboukhadijeh <feross@feross.org> <http://feross.org>
 * @license  MIT
 */
function compare(a, b) {
  if (a === b) {
    return 0;
  }

  var x = a.length;
  var y = b.length;

  for (var i = 0, len = Math.min(x, y); i < len; ++i) {
    if (a[i] !== b[i]) {
      x = a[i];
      y = b[i];
      break;
    }
  }

  if (x < y) {
    return -1;
  }
  if (y < x) {
    return 1;
  }
  return 0;
}
function isBuffer(b) {
  if (global.Buffer && typeof global.Buffer.isBuffer === 'function') {
    return global.Buffer.isBuffer(b);
  }
  return !!(b != null && b._isBuffer);
}

// based on node assert, original notice:

// http://wiki.commonjs.org/wiki/Unit_Testing/1.0
//
// THIS IS NOT TESTED NOR LIKELY TO WORK OUTSIDE V8!
//
// Originally from narwhal.js (http://narwhaljs.org)
// Copyright (c) 2009 Thomas Robinson <280north.com>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the 'Software'), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
// ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

var util = require('util/');
var hasOwn = Object.prototype.hasOwnProperty;
var pSlice = Array.prototype.slice;
var functionsHaveNames = (function () {
  return function foo() {}.name === 'foo';
}());
function pToString (obj) {
  return Object.prototype.toString.call(obj);
}
function isView(arrbuf) {
  if (isBuffer(arrbuf)) {
    return false;
  }
  if (typeof global.ArrayBuffer !== 'function') {
    return false;
  }
  if (typeof ArrayBuffer.isView === 'function') {
    return ArrayBuffer.isView(arrbuf);
  }
  if (!arrbuf) {
    return false;
  }
  if (arrbuf instanceof DataView) {
    return true;
  }
  if (arrbuf.buffer && arrbuf.buffer instanceof ArrayBuffer) {
    return true;
  }
  return false;
}
// 1. The assert module provides functions that throw
// AssertionError's when particular conditions are not met. The
// assert module must conform to the following interface.

var assert = module.exports = ok;

// 2. The AssertionError is defined in assert.
// new assert.AssertionError({ message: message,
//                             actual: actual,
//                             expected: expected })

var regex = /\s*function\s+([^\(\s]*)\s*/;
// based on https://github.com/ljharb/function.prototype.name/blob/adeeeec8bfcc6068b187d7d9fb3d5bb1d3a30899/implementation.js
function getName(func) {
  if (!util.isFunction(func)) {
    return;
  }
  if (functionsHaveNames) {
    return func.name;
  }
  var str = func.toString();
  var match = str.match(regex);
  return match && match[1];
}
assert.AssertionError = function AssertionError(options) {
  this.name = 'AssertionError';
  this.actual = options.actual;
  this.expected = options.expected;
  this.operator = options.operator;
  if (options.message) {
    this.message = options.message;
    this.generatedMessage = false;
  } else {
    this.message = getMessage(this);
    this.generatedMessage = true;
  }
  var stackStartFunction = options.stackStartFunction || fail;
  if (Error.captureStackTrace) {
    Error.captureStackTrace(this, stackStartFunction);
  } else {
    // non v8 browsers so we can have a stacktrace
    var err = new Error();
    if (err.stack) {
      var out = err.stack;

      // try to strip useless frames
      var fn_name = getName(stackStartFunction);
      var idx = out.indexOf('\n' + fn_name);
      if (idx >= 0) {
        // once we have located the function frame
        // we need to strip out everything before it (and its line)
        var next_line = out.indexOf('\n', idx + 1);
        out = out.substring(next_line + 1);
      }

      this.stack = out;
    }
  }
};

// assert.AssertionError instanceof Error
util.inherits(assert.AssertionError, Error);

function truncate(s, n) {
  if (typeof s === 'string') {
    return s.length < n ? s : s.slice(0, n);
  } else {
    return s;
  }
}
function inspect(something) {
  if (functionsHaveNames || !util.isFunction(something)) {
    return util.inspect(something);
  }
  var rawname = getName(something);
  var name = rawname ? ': ' + rawname : '';
  return '[Function' +  name + ']';
}
function getMessage(self) {
  return truncate(inspect(self.actual), 128) + ' ' +
         self.operator + ' ' +
         truncate(inspect(self.expected), 128);
}

// At present only the three keys mentioned above are used and
// understood by the spec. Implementations or sub modules can pass
// other keys to the AssertionError's constructor - they will be
// ignored.

// 3. All of the following functions must throw an AssertionError
// when a corresponding condition is not met, with a message that
// may be undefined if not provided.  All assertion methods provide
// both the actual and expected values to the assertion error for
// display purposes.

function fail(actual, expected, message, operator, stackStartFunction) {
  throw new assert.AssertionError({
    message: message,
    actual: actual,
    expected: expected,
    operator: operator,
    stackStartFunction: stackStartFunction
  });
}

// EXTENSION! allows for well behaved errors defined elsewhere.
assert.fail = fail;

// 4. Pure assertion tests whether a value is truthy, as determined
// by !!guard.
// assert.ok(guard, message_opt);
// This statement is equivalent to assert.equal(true, !!guard,
// message_opt);. To test strictly for the value true, use
// assert.strictEqual(true, guard, message_opt);.

function ok(value, message) {
  if (!value) fail(value, true, message, '==', assert.ok);
}
assert.ok = ok;

// 5. The equality assertion tests shallow, coercive equality with
// ==.
// assert.equal(actual, expected, message_opt);

assert.equal = function equal(actual, expected, message) {
  if (actual != expected) fail(actual, expected, message, '==', assert.equal);
};

// 6. The non-equality assertion tests for whether two objects are not equal
// with != assert.notEqual(actual, expected, message_opt);

assert.notEqual = function notEqual(actual, expected, message) {
  if (actual == expected) {
    fail(actual, expected, message, '!=', assert.notEqual);
  }
};

// 7. The equivalence assertion tests a deep equality relation.
// assert.deepEqual(actual, expected, message_opt);

assert.deepEqual = function deepEqual(actual, expected, message) {
  if (!_deepEqual(actual, expected, false)) {
    fail(actual, expected, message, 'deepEqual', assert.deepEqual);
  }
};

assert.deepStrictEqual = function deepStrictEqual(actual, expected, message) {
  if (!_deepEqual(actual, expected, true)) {
    fail(actual, expected, message, 'deepStrictEqual', assert.deepStrictEqual);
  }
};

function _deepEqual(actual, expected, strict, memos) {
  // 7.1. All identical values are equivalent, as determined by ===.
  if (actual === expected) {
    return true;
  } else if (isBuffer(actual) && isBuffer(expected)) {
    return compare(actual, expected) === 0;

  // 7.2. If the expected value is a Date object, the actual value is
  // equivalent if it is also a Date object that refers to the same time.
  } else if (util.isDate(actual) && util.isDate(expected)) {
    return actual.getTime() === expected.getTime();

  // 7.3 If the expected value is a RegExp object, the actual value is
  // equivalent if it is also a RegExp object with the same source and
  // properties (`global`, `multiline`, `lastIndex`, `ignoreCase`).
  } else if (util.isRegExp(actual) && util.isRegExp(expected)) {
    return actual.source === expected.source &&
           actual.global === expected.global &&
           actual.multiline === expected.multiline &&
           actual.lastIndex === expected.lastIndex &&
           actual.ignoreCase === expected.ignoreCase;

  // 7.4. Other pairs that do not both pass typeof value == 'object',
  // equivalence is determined by ==.
  } else if ((actual === null || typeof actual !== 'object') &&
             (expected === null || typeof expected !== 'object')) {
    return strict ? actual === expected : actual == expected;

  // If both values are instances of typed arrays, wrap their underlying
  // ArrayBuffers in a Buffer each to increase performance
  // This optimization requires the arrays to have the same type as checked by
  // Object.prototype.toString (aka pToString). Never perform binary
  // comparisons for Float*Arrays, though, since e.g. +0 === -0 but their
  // bit patterns are not identical.
  } else if (isView(actual) && isView(expected) &&
             pToString(actual) === pToString(expected) &&
             !(actual instanceof Float32Array ||
               actual instanceof Float64Array)) {
    return compare(new Uint8Array(actual.buffer),
                   new Uint8Array(expected.buffer)) === 0;

  // 7.5 For all other Object pairs, including Array objects, equivalence is
  // determined by having the same number of owned properties (as verified
  // with Object.prototype.hasOwnProperty.call), the same set of keys
  // (although not necessarily the same order), equivalent values for every
  // corresponding key, and an identical 'prototype' property. Note: this
  // accounts for both named and indexed properties on Arrays.
  } else if (isBuffer(actual) !== isBuffer(expected)) {
    return false;
  } else {
    memos = memos || {actual: [], expected: []};

    var actualIndex = memos.actual.indexOf(actual);
    if (actualIndex !== -1) {
      if (actualIndex === memos.expected.indexOf(expected)) {
        return true;
      }
    }

    memos.actual.push(actual);
    memos.expected.push(expected);

    return objEquiv(actual, expected, strict, memos);
  }
}

function isArguments(object) {
  return Object.prototype.toString.call(object) == '[object Arguments]';
}

function objEquiv(a, b, strict, actualVisitedObjects) {
  if (a === null || a === undefined || b === null || b === undefined)
    return false;
  // if one is a primitive, the other must be same
  if (util.isPrimitive(a) || util.isPrimitive(b))
    return a === b;
  if (strict && Object.getPrototypeOf(a) !== Object.getPrototypeOf(b))
    return false;
  var aIsArgs = isArguments(a);
  var bIsArgs = isArguments(b);
  if ((aIsArgs && !bIsArgs) || (!aIsArgs && bIsArgs))
    return false;
  if (aIsArgs) {
    a = pSlice.call(a);
    b = pSlice.call(b);
    return _deepEqual(a, b, strict);
  }
  var ka = objectKeys(a);
  var kb = objectKeys(b);
  var key, i;
  // having the same number of owned properties (keys incorporates
  // hasOwnProperty)
  if (ka.length !== kb.length)
    return false;
  //the same set of keys (although not necessarily the same order),
  ka.sort();
  kb.sort();
  //~~~cheap key test
  for (i = ka.length - 1; i >= 0; i--) {
    if (ka[i] !== kb[i])
      return false;
  }
  //equivalent values for every corresponding key, and
  //~~~possibly expensive deep test
  for (i = ka.length - 1; i >= 0; i--) {
    key = ka[i];
    if (!_deepEqual(a[key], b[key], strict, actualVisitedObjects))
      return false;
  }
  return true;
}

// 8. The non-equivalence assertion tests for any deep inequality.
// assert.notDeepEqual(actual, expected, message_opt);

assert.notDeepEqual = function notDeepEqual(actual, expected, message) {
  if (_deepEqual(actual, expected, false)) {
    fail(actual, expected, message, 'notDeepEqual', assert.notDeepEqual);
  }
};

assert.notDeepStrictEqual = notDeepStrictEqual;
function notDeepStrictEqual(actual, expected, message) {
  if (_deepEqual(actual, expected, true)) {
    fail(actual, expected, message, 'notDeepStrictEqual', notDeepStrictEqual);
  }
}


// 9. The strict equality assertion tests strict equality, as determined by ===.
// assert.strictEqual(actual, expected, message_opt);

assert.strictEqual = function strictEqual(actual, expected, message) {
  if (actual !== expected) {
    fail(actual, expected, message, '===', assert.strictEqual);
  }
};

// 10. The strict non-equality assertion tests for strict inequality, as
// determined by !==.  assert.notStrictEqual(actual, expected, message_opt);

assert.notStrictEqual = function notStrictEqual(actual, expected, message) {
  if (actual === expected) {
    fail(actual, expected, message, '!==', assert.notStrictEqual);
  }
};

function expectedException(actual, expected) {
  if (!actual || !expected) {
    return false;
  }

  if (Object.prototype.toString.call(expected) == '[object RegExp]') {
    return expected.test(actual);
  }

  try {
    if (actual instanceof expected) {
      return true;
    }
  } catch (e) {
    // Ignore.  The instanceof check doesn't work for arrow functions.
  }

  if (Error.isPrototypeOf(expected)) {
    return false;
  }

  return expected.call({}, actual) === true;
}

function _tryBlock(block) {
  var error;
  try {
    block();
  } catch (e) {
    error = e;
  }
  return error;
}

function _throws(shouldThrow, block, expected, message) {
  var actual;

  if (typeof block !== 'function') {
    throw new TypeError('"block" argument must be a function');
  }

  if (typeof expected === 'string') {
    message = expected;
    expected = null;
  }

  actual = _tryBlock(block);

  message = (expected && expected.name ? ' (' + expected.name + ').' : '.') +
            (message ? ' ' + message : '.');

  if (shouldThrow && !actual) {
    fail(actual, expected, 'Missing expected exception' + message);
  }

  var userProvidedMessage = typeof message === 'string';
  var isUnwantedException = !shouldThrow && util.isError(actual);
  var isUnexpectedException = !shouldThrow && actual && !expected;

  if ((isUnwantedException &&
      userProvidedMessage &&
      expectedException(actual, expected)) ||
      isUnexpectedException) {
    fail(actual, expected, 'Got unwanted exception' + message);
  }

  if ((shouldThrow && actual && expected &&
      !expectedException(actual, expected)) || (!shouldThrow && actual)) {
    throw actual;
  }
}

// 11. Expected to throw an error:
// assert.throws(block, Error_opt, message_opt);

assert.throws = function(block, /*optional*/error, /*optional*/message) {
  _throws(true, block, error, message);
};

// EXTENSION! This is annoying to write outside this module.
assert.doesNotThrow = function(block, /*optional*/error, /*optional*/message) {
  _throws(false, block, error, message);
};

assert.ifError = function(err) { if (err) throw err; };

var objectKeys = Object.keys || function (obj) {
  var keys = [];
  for (var key in obj) {
    if (hasOwn.call(obj, key)) keys.push(key);
  }
  return keys;
};

}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"util/":58}],21:[function(require,module,exports){
'use strict'

exports.byteLength = byteLength
exports.toByteArray = toByteArray
exports.fromByteArray = fromByteArray

var lookup = []
var revLookup = []
var Arr = typeof Uint8Array !== 'undefined' ? Uint8Array : Array

var code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
for (var i = 0, len = code.length; i < len; ++i) {
  lookup[i] = code[i]
  revLookup[code.charCodeAt(i)] = i
}

// Support decoding URL-safe base64 strings, as Node.js does.
// See: https://en.wikipedia.org/wiki/Base64#URL_applications
revLookup['-'.charCodeAt(0)] = 62
revLookup['_'.charCodeAt(0)] = 63

function getLens (b64) {
  var len = b64.length

  if (len % 4 > 0) {
    throw new Error('Invalid string. Length must be a multiple of 4')
  }

  // Trim off extra bytes after placeholder bytes are found
  // See: https://github.com/beatgammit/base64-js/issues/42
  var validLen = b64.indexOf('=')
  if (validLen === -1) validLen = len

  var placeHoldersLen = validLen === len
    ? 0
    : 4 - (validLen % 4)

  return [validLen, placeHoldersLen]
}

// base64 is 4/3 + up to two characters of the original data
function byteLength (b64) {
  var lens = getLens(b64)
  var validLen = lens[0]
  var placeHoldersLen = lens[1]
  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen
}

function _byteLength (b64, validLen, placeHoldersLen) {
  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen
}

function toByteArray (b64) {
  var tmp
  var lens = getLens(b64)
  var validLen = lens[0]
  var placeHoldersLen = lens[1]

  var arr = new Arr(_byteLength(b64, validLen, placeHoldersLen))

  var curByte = 0

  // if there are placeholders, only get up to the last complete 4 chars
  var len = placeHoldersLen > 0
    ? validLen - 4
    : validLen

  for (var i = 0; i < len; i += 4) {
    tmp =
      (revLookup[b64.charCodeAt(i)] << 18) |
      (revLookup[b64.charCodeAt(i + 1)] << 12) |
      (revLookup[b64.charCodeAt(i + 2)] << 6) |
      revLookup[b64.charCodeAt(i + 3)]
    arr[curByte++] = (tmp >> 16) & 0xFF
    arr[curByte++] = (tmp >> 8) & 0xFF
    arr[curByte++] = tmp & 0xFF
  }

  if (placeHoldersLen === 2) {
    tmp =
      (revLookup[b64.charCodeAt(i)] << 2) |
      (revLookup[b64.charCodeAt(i + 1)] >> 4)
    arr[curByte++] = tmp & 0xFF
  }

  if (placeHoldersLen === 1) {
    tmp =
      (revLookup[b64.charCodeAt(i)] << 10) |
      (revLookup[b64.charCodeAt(i + 1)] << 4) |
      (revLookup[b64.charCodeAt(i + 2)] >> 2)
    arr[curByte++] = (tmp >> 8) & 0xFF
    arr[curByte++] = tmp & 0xFF
  }

  return arr
}

function tripletToBase64 (num) {
  return lookup[num >> 18 & 0x3F] +
    lookup[num >> 12 & 0x3F] +
    lookup[num >> 6 & 0x3F] +
    lookup[num & 0x3F]
}

function encodeChunk (uint8, start, end) {
  var tmp
  var output = []
  for (var i = start; i < end; i += 3) {
    tmp =
      ((uint8[i] << 16) & 0xFF0000) +
      ((uint8[i + 1] << 8) & 0xFF00) +
      (uint8[i + 2] & 0xFF)
    output.push(tripletToBase64(tmp))
  }
  return output.join('')
}

function fromByteArray (uint8) {
  var tmp
  var len = uint8.length
  var extraBytes = len % 3 // if we have 1 byte left, pad 2 bytes
  var parts = []
  var maxChunkLength = 16383 // must be multiple of 3

  // go through the array every three bytes, we'll deal with trailing stuff later
  for (var i = 0, len2 = len - extraBytes; i < len2; i += maxChunkLength) {
    parts.push(encodeChunk(
      uint8, i, (i + maxChunkLength) > len2 ? len2 : (i + maxChunkLength)
    ))
  }

  // pad the end with zeros, but make sure to not forget the extra bytes
  if (extraBytes === 1) {
    tmp = uint8[len - 1]
    parts.push(
      lookup[tmp >> 2] +
      lookup[(tmp << 4) & 0x3F] +
      '=='
    )
  } else if (extraBytes === 2) {
    tmp = (uint8[len - 2] << 8) + uint8[len - 1]
    parts.push(
      lookup[tmp >> 10] +
      lookup[(tmp >> 4) & 0x3F] +
      lookup[(tmp << 2) & 0x3F] +
      '='
    )
  }

  return parts.join('')
}

},{}],22:[function(require,module,exports){

},{}],23:[function(require,module,exports){
(function (Buffer){
/* bignumber.js v1.3.0 https://github.com/MikeMcl/bignumber.js/LICENCE */

/*jslint bitwise: true, eqeq: true, plusplus: true, sub: true, white: true, maxerr: 500 */
/*global module */

/*
  bignumber.js v1.3.0
  A JavaScript library for arbitrary-precision arithmetic.
  https://github.com/MikeMcl/bignumber.js
  Copyright (c) 2012 Michael Mclaughlin <M8ch88l@gmail.com>
  MIT Expat Licence
*/

/*********************************** DEFAULTS ************************************/

/*
 * The default values below must be integers within the stated ranges (inclusive).
 * Most of these values can be changed during run-time using BigNumber.config().
 */

/*
 * The limit on the value of DECIMAL_PLACES, TO_EXP_NEG, TO_EXP_POS, MIN_EXP,
 * MAX_EXP, and the argument to toFixed, toPrecision and toExponential, beyond
 * which an exception is thrown (if ERRORS is true).
 */
var MAX = 1E9,                                   // 0 to 1e+9

    // Limit of magnitude of exponent argument to toPower.
    MAX_POWER = 1E6,                             // 1 to 1e+6

    // The maximum number of decimal places for operations involving division.
    DECIMAL_PLACES = 20,                         // 0 to MAX

    /*
     * The rounding mode used when rounding to the above decimal places, and when
     * using toFixed, toPrecision and toExponential, and round (default value).
     * UP         0 Away from zero.
     * DOWN       1 Towards zero.
     * CEIL       2 Towards +Infinity.
     * FLOOR      3 Towards -Infinity.
     * HALF_UP    4 Towards nearest neighbour. If equidistant, up.
     * HALF_DOWN  5 Towards nearest neighbour. If equidistant, down.
     * HALF_EVEN  6 Towards nearest neighbour. If equidistant, towards even neighbour.
     * HALF_CEIL  7 Towards nearest neighbour. If equidistant, towards +Infinity.
     * HALF_FLOOR 8 Towards nearest neighbour. If equidistant, towards -Infinity.
     */
    ROUNDING_MODE = 4,                           // 0 to 8

    // EXPONENTIAL_AT : [TO_EXP_NEG , TO_EXP_POS]

    // The exponent value at and beneath which toString returns exponential notation.
    // Number type: -7
    TO_EXP_NEG = -7,                             // 0 to -MAX

    // The exponent value at and above which toString returns exponential notation.
    // Number type: 21
    TO_EXP_POS = 21,                             // 0 to MAX

    // RANGE : [MIN_EXP, MAX_EXP]

    // The minimum exponent value, beneath which underflow to zero occurs.
    // Number type: -324  (5e-324)
    MIN_EXP = -MAX,                              // -1 to -MAX

    // The maximum exponent value, above which overflow to Infinity occurs.
    // Number type:  308  (1.7976931348623157e+308)
    MAX_EXP = MAX,                               // 1 to MAX

    // Whether BigNumber Errors are ever thrown.
    // CHANGE parseInt to parseFloat if changing ERRORS to false.
    ERRORS = true,                               // true or false
    parse = parseInt,                            // parseInt or parseFloat

/***********************************************************************************/

    P = BigNumber.prototype,
    DIGITS = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ$_',
    outOfRange,
    id = 0,
    isValid = /^-?(\d+(\.\d*)?|\.\d+)(e[+-]?\d+)?$/i,
    trim = String.prototype.trim || function () {return this.replace(/^\s+|\s+$/g, '')},
    ONE = BigNumber(1);


// CONSTRUCTOR


/*
 * The exported function.
 * Create and return a new instance of a BigNumber object.
 *
 * n {number|string|BigNumber} A numeric value.
 * [b] {number} The base of n. Integer, 2 to 64 inclusive.
 */
function BigNumber( n, b ) {
    var e, i, isNum, digits, valid, orig,
        x = this;

    // Enable constructor usage without new.
    if ( !(x instanceof BigNumber) ) {
        return new BigNumber( n, b )
    }

    // Duplicate.
    if ( n instanceof BigNumber ) {
        id = 0;

        // e is undefined.
        if ( b !== e ) {
            n += ''
        } else {
            x['s'] = n['s'];
            x['e'] = n['e'];
            x['c'] = ( n = n['c'] ) ? n.slice() : n;
            return;
        }
    }

    // If number, check if minus zero.
    if ( typeof n != 'string' ) {
        n = ( isNum = typeof n == 'number' ||
            Object.prototype.toString.call(n) == '[object Number]' ) &&
                n === 0 && 1 / n < 0 ? '-0' : n + '';
    }

    orig = n;

    if ( b === e && isValid.test(n) ) {

        // Determine sign.
        x['s'] = n.charAt(0) == '-' ? ( n = n.slice(1), -1 ) : 1;

    // Either n is not a valid BigNumber or a base has been specified.
    } else {

        // Enable exponential notation to be used with base 10 argument.
        // Ensure return value is rounded to DECIMAL_PLACES as with other bases.
        if ( b == 10 ) {

            return setMode( n, DECIMAL_PLACES, ROUNDING_MODE );
        }

        n = trim.call(n).replace( /^\+(?!-)/, '' );

        x['s'] = n.charAt(0) == '-' ? ( n = n.replace( /^-(?!-)/, '' ), -1 ) : 1;

        if ( b != null ) {

            if ( ( b == (b | 0) || !ERRORS ) &&
              !( outOfRange = !( b >= 2 && b < 65 ) ) ) {

                digits = '[' + DIGITS.slice( 0, b = b | 0 ) + ']+';

                // Before non-decimal number validity test and base conversion
                // remove the `.` from e.g. '1.', and replace e.g. '.1' with '0.1'.
                n = n.replace( /\.$/, '' ).replace( /^\./, '0.' );

                // Any number in exponential form will fail due to the e+/-.
                if ( valid = new RegExp(
                  '^' + digits + '(?:\\.' + digits + ')?$', b < 37 ? 'i' : '' ).test(n) ) {

                    if ( isNum ) {

                        if ( n.replace( /^0\.0*|\./, '' ).length > 15 ) {

                            // 'new BigNumber() number type has more than 15 significant digits: {n}'
                            ifExceptionsThrow( orig, 0 );
                        }

                        // Prevent later check for length on converted number.
                        isNum = !isNum;
                    }
                    n = convert( n, 10, b, x['s'] );

                } else if ( n != 'Infinity' && n != 'NaN' ) {

                    // 'new BigNumber() not a base {b} number: {n}'
                    ifExceptionsThrow( orig, 1, b );
                    n = 'NaN';
                }
            } else {

                // 'new BigNumber() base not an integer: {b}'
                // 'new BigNumber() base out of range: {b}'
                ifExceptionsThrow( b, 2 );

                // Ignore base.
                valid = isValid.test(n);
            }
        } else {
            valid = isValid.test(n);
        }

        if ( !valid ) {

            // Infinity/NaN
            x['c'] = x['e'] = null;

            // NaN
            if ( n != 'Infinity' ) {

                // No exception on NaN.
                if ( n != 'NaN' ) {

                    // 'new BigNumber() not a number: {n}'
                    ifExceptionsThrow( orig, 3 );
                }
                x['s'] = null;
            }
            id = 0;

            return;
        }
    }

    // Decimal point?
    if ( ( e = n.indexOf('.') ) > -1 ) {
        n = n.replace( '.', '' );
    }

    // Exponential form?
    if ( ( i = n.search( /e/i ) ) > 0 ) {

        // Determine exponent.
        if ( e < 0 ) {
            e = i;
        }
        e += +n.slice( i + 1 );
        n = n.substring( 0, i );

    } else if ( e < 0 ) {

        // Integer.
        e = n.length;
    }

    // Determine leading zeros.
    for ( i = 0; n.charAt(i) == '0'; i++ ) {
    }

    b = n.length;

    // Disallow numbers with over 15 significant digits if number type.
    if ( isNum && b > 15 && n.slice(i).length > 15 ) {

        // 'new BigNumber() number type has more than 15 significant digits: {n}'
        ifExceptionsThrow( orig, 0 );
    }
    id = 0;

    // Overflow?
    if ( ( e -= i + 1 ) > MAX_EXP ) {

        // Infinity.
        x['c'] = x['e'] = null;

    // Zero or underflow?
    } else if ( i == b || e < MIN_EXP ) {

        // Zero.
        x['c'] = [ x['e'] = 0 ];
    } else {

        // Determine trailing zeros.
        for ( ; n.charAt(--b) == '0'; ) {
        }

        x['e'] = e;
        x['c'] = [];

        // Convert string to array of digits (without leading and trailing zeros).
        for ( e = 0; i <= b; x['c'][e++] = +n.charAt(i++) ) {
        }
    }
}


// CONSTRUCTOR PROPERTIES/METHODS


BigNumber['ROUND_UP'] = 0;
BigNumber['ROUND_DOWN'] = 1;
BigNumber['ROUND_CEIL'] = 2;
BigNumber['ROUND_FLOOR'] = 3;
BigNumber['ROUND_HALF_UP'] = 4;
BigNumber['ROUND_HALF_DOWN'] = 5;
BigNumber['ROUND_HALF_EVEN'] = 6;
BigNumber['ROUND_HALF_CEIL'] = 7;
BigNumber['ROUND_HALF_FLOOR'] = 8;

/*
 * Create an instance from a Buffer
 */
BigNumber['fromBuffer'] = function (buf, opts) {

    if (!opts) opts = {};

    var endian = { 1 : 'big', '-1' : 'little' }[opts.endian]
        || opts.endian || 'big'
    ;

    var size = opts.size === 'auto' ? Math.ceil(buf.length) : (opts.size || 1);

    if (buf.length % size !== 0) {
        throw new RangeError('Buffer length (' + buf.length + ')'
            + ' must be a multiple of size (' + size + ')'
        );
    }

    var hex = [];
    for (var i = 0; i < buf.length; i += size) {
        var chunk = [];
        for (var j = 0; j < size; j++) {
            chunk.push(buf[
                i + (endian === 'big' ? j : (size - j - 1))
            ]);
        }

        hex.push(chunk
            .map(function (c) {
                return (c < 16 ? '0' : '') + c.toString(16);
            })
            .join('')
        );
    }

    return BigNumber(hex.join(''), 16);

};

/*
 * Configure infrequently-changing library-wide settings.
 *
 * Accept an object or an argument list, with one or many of the following
 * properties or parameters respectively:
 * [ DECIMAL_PLACES [, ROUNDING_MODE [, EXPONENTIAL_AT [, RANGE [, ERRORS ]]]]]
 *
 * E.g.
 * BigNumber.config(20, 4) is equivalent to
 * BigNumber.config({ DECIMAL_PLACES : 20, ROUNDING_MODE : 4 })
 * Ignore properties/parameters set to null or undefined.
 *
 * Return an object with the properties current values.
 */
BigNumber['config'] = function () {
    var v, p,
        i = 0,
        r = {},
        a = arguments,
        o = a[0],
        c = 'config',
        inRange = function ( n, lo, hi ) {
          return !( ( outOfRange = n < lo || n > hi ) ||
            parse(n) != n && n !== 0 );
        },
        has = o && typeof o == 'object'
          ? function () {if ( o.hasOwnProperty(p) ) return ( v = o[p] ) != null}
          : function () {if ( a.length > i ) return ( v = a[i++] ) != null};

    // [DECIMAL_PLACES] {number} Integer, 0 to MAX inclusive.
    if ( has( p = 'DECIMAL_PLACES' ) ) {

        if ( inRange( v, 0, MAX ) ) {
            DECIMAL_PLACES = v | 0;
        } else {

            // 'config() DECIMAL_PLACES not an integer: {v}'
            // 'config() DECIMAL_PLACES out of range: {v}'
            ifExceptionsThrow( v, p, c );
        }
    }
    r[p] = DECIMAL_PLACES;

    // [ROUNDING_MODE] {number} Integer, 0 to 8 inclusive.
    if ( has( p = 'ROUNDING_MODE' ) ) {

        if ( inRange( v, 0, 8 ) ) {
            ROUNDING_MODE = v | 0;
        } else {

            // 'config() ROUNDING_MODE not an integer: {v}'
            // 'config() ROUNDING_MODE out of range: {v}'
            ifExceptionsThrow( v, p, c );
        }
    }
    r[p] = ROUNDING_MODE;

    /*
     * [EXPONENTIAL_AT] {number|number[]} Integer, -MAX to MAX inclusive or
     * [ integer -MAX to 0 inclusive, 0 to MAX inclusive ].
     */
    if ( has( p = 'EXPONENTIAL_AT' ) ) {

        if ( inRange( v, -MAX, MAX ) ) {
            TO_EXP_NEG = -( TO_EXP_POS = ~~( v < 0 ? -v : +v ) );
        } else if ( !outOfRange && v && inRange( v[0], -MAX, 0 ) &&
          inRange( v[1], 0, MAX ) ) {
            TO_EXP_NEG = ~~v[0];
            TO_EXP_POS = ~~v[1];
        } else {

            // 'config() EXPONENTIAL_AT not an integer or not [integer, integer]: {v}'
            // 'config() EXPONENTIAL_AT out of range or not [negative, positive: {v}'
            ifExceptionsThrow( v, p, c, 1 );
        }
    }
    r[p] = [ TO_EXP_NEG, TO_EXP_POS ];

    /*
     * [RANGE][ {number|number[]} Non-zero integer, -MAX to MAX inclusive or
     * [ integer -MAX to -1 inclusive, integer 1 to MAX inclusive ].
     */
    if ( has( p = 'RANGE' ) ) {

        if ( inRange( v, -MAX, MAX ) && ~~v ) {
            MIN_EXP = -( MAX_EXP = ~~( v < 0 ? -v : +v ) );
        } else if ( !outOfRange && v && inRange( v[0], -MAX, -1 ) &&
          inRange( v[1], 1, MAX ) ) {
            MIN_EXP = ~~v[0], MAX_EXP = ~~v[1];
        } else {

            // 'config() RANGE not a non-zero integer or not [integer, integer]: {v}'
            // 'config() RANGE out of range or not [negative, positive: {v}'
            ifExceptionsThrow( v, p, c, 1, 1 );
        }
    }
    r[p] = [ MIN_EXP, MAX_EXP ];

    // [ERRORS] {boolean|number} true, false, 1 or 0.
    if ( has( p = 'ERRORS' ) ) {

        if ( v === !!v || v === 1 || v === 0 ) {
            parse = ( outOfRange = id = 0, ERRORS = !!v )
              ? parseInt
              : parseFloat;
        } else {

            // 'config() ERRORS not a boolean or binary digit: {v}'
            ifExceptionsThrow( v, p, c, 0, 0, 1 );
        }
    }
    r[p] = ERRORS;

    return r;
};


// PRIVATE FUNCTIONS


// Assemble error messages. Throw BigNumber Errors.
function ifExceptionsThrow( arg, i, j, isArray, isRange, isErrors) {

    if ( ERRORS ) {
        var error,
            method = ['new BigNumber', 'cmp', 'div', 'eq', 'gt', 'gte', 'lt',
                 'lte', 'minus', 'mod', 'plus', 'times', 'toFr'
                ][ id ? id < 0 ? -id : id : 1 / id < 0 ? 1 : 0 ] + '()',
            message = outOfRange ? ' out of range' : ' not a' +
              ( isRange ? ' non-zero' : 'n' ) + ' integer';

        message = ( [
            method + ' number type has more than 15 significant digits',
            method + ' not a base ' + j + ' number',
            method + ' base' + message,
            method + ' not a number' ][i] ||
              j + '() ' + i + ( isErrors
                ? ' not a boolean or binary digit'
                : message + ( isArray
                  ? ' or not [' + ( outOfRange
                    ? ' negative, positive'
                    : ' integer, integer' ) + ' ]'
                  : '' ) ) ) + ': ' + arg;

        outOfRange = id = 0;
        error = new Error(message);
        error['name'] = 'BigNumber Error';

        throw error;
    }
}


/*
 * Convert a numeric string of baseIn to a numeric string of baseOut.
 */
function convert( nStr, baseOut, baseIn, sign ) {
    var e, dvs, dvd, nArr, fracArr, fracBN;

    // Convert string of base bIn to an array of numbers of baseOut.
    // Eg. strToArr('255', 10) where baseOut is 16, returns [15, 15].
    // Eg. strToArr('ff', 16)  where baseOut is 10, returns [2, 5, 5].
    function strToArr( str, bIn ) {
        var j,
            i = 0,
            strL = str.length,
            arrL,
            arr = [0];

        for ( bIn = bIn || baseIn; i < strL; i++ ) {

            for ( arrL = arr.length, j = 0; j < arrL; arr[j] *= bIn, j++ ) {
            }

            for ( arr[0] += DIGITS.indexOf( str.charAt(i) ), j = 0;
                  j < arr.length;
                  j++ ) {

                if ( arr[j] > baseOut - 1 ) {

                    if ( arr[j + 1] == null ) {
                        arr[j + 1] = 0;
                    }
                    arr[j + 1] += arr[j] / baseOut ^ 0;
                    arr[j] %= baseOut;
                }
            }
        }

        return arr.reverse();
    }

    // Convert array to string.
    // E.g. arrToStr( [9, 10, 11] ) becomes '9ab' (in bases above 11).
    function arrToStr( arr ) {
        var i = 0,
            arrL = arr.length,
            str = '';

        for ( ; i < arrL; str += DIGITS.charAt( arr[i++] ) ) {
        }

        return str;
    }

    if ( baseIn < 37 ) {
        nStr = nStr.toLowerCase();
    }

    /*
     * If non-integer convert integer part and fraction part separately.
     * Convert the fraction part as if it is an integer than use division to
     * reduce it down again to a value less than one.
     */
    if ( ( e = nStr.indexOf( '.' ) ) > -1 ) {

        /*
         * Calculate the power to which to raise the base to get the number
         * to divide the fraction part by after it has been converted as an
         * integer to the required base.
         */
        e = nStr.length - e - 1;

        // Use toFixed to avoid possible exponential notation.
        dvs = strToArr( new BigNumber(baseIn)['pow'](e)['toF'](), 10 );

        nArr = nStr.split('.');

        // Convert the base of the fraction part (as integer).
        dvd = strToArr( nArr[1] );

        // Convert the base of the integer part.
        nArr = strToArr( nArr[0] );

        // Result will be a BigNumber with a value less than 1.
        fracBN = divide( dvd, dvs, dvd.length - dvs.length, sign, baseOut,
          // Is least significant digit of integer part an odd number?
          nArr[nArr.length - 1] & 1 );

        fracArr = fracBN['c'];

        // e can be <= 0  ( if e == 0, fracArr is [0] or [1] ).
        if ( e = fracBN['e'] ) {

            // Append zeros according to the exponent of the result.
            for ( ; ++e; fracArr.unshift(0) ) {
            }

            // Append the fraction part to the converted integer part.
            nStr = arrToStr(nArr) + '.' + arrToStr(fracArr);

        // fracArr is [1].
        // Fraction digits rounded up, so increment last digit of integer part.
        } else if ( fracArr[0] ) {

            if ( nArr[ e = nArr.length - 1 ] < baseOut - 1 ) {
                ++nArr[e];
                nStr = arrToStr(nArr);
            } else {
                nStr = new BigNumber( arrToStr(nArr),
                  baseOut )['plus'](ONE)['toS'](baseOut);
            }

        // fracArr is [0]. No fraction digits.
        } else {
            nStr = arrToStr(nArr);
        }
    } else {

        // Simple integer. Convert base.
        nStr = arrToStr( strToArr(nStr) );
    }

    return nStr;
}


// Perform division in the specified base. Called by div and convert.
function divide( dvd, dvs, exp, s, base, isOdd ) {
    var dvsL, dvsT, next, cmp, remI,
        dvsZ = dvs.slice(),
        dvdI = dvsL = dvs.length,
        dvdL = dvd.length,
        rem = dvd.slice( 0, dvsL ),
        remL = rem.length,
        quo = new BigNumber(ONE),
        qc = quo['c'] = [],
        qi = 0,
        dig = DECIMAL_PLACES + ( quo['e'] = exp ) + 1;

    quo['s'] = s;
    s = dig < 0 ? 0 : dig;

    // Add zeros to make remainder as long as divisor.
    for ( ; remL++ < dvsL; rem.push(0) ) {
    }

    // Create version of divisor with leading zero.
    dvsZ.unshift(0);

    do {

        // 'next' is how many times the divisor goes into the current remainder.
        for ( next = 0; next < base; next++ ) {

            // Compare divisor and remainder.
            if ( dvsL != ( remL = rem.length ) ) {
                cmp = dvsL > remL ? 1 : -1;
            } else {
                for ( remI = -1, cmp = 0; ++remI < dvsL; ) {

                    if ( dvs[remI] != rem[remI] ) {
                        cmp = dvs[remI] > rem[remI] ? 1 : -1;
                        break;
                    }
                }
            }

            // Subtract divisor from remainder (if divisor < remainder).
            if ( cmp < 0 ) {

                // Remainder cannot be more than one digit longer than divisor.
                // Equalise lengths using divisor with extra leading zero?
                for ( dvsT = remL == dvsL ? dvs : dvsZ; remL; ) {

                    if ( rem[--remL] < dvsT[remL] ) {

                        for ( remI = remL;
                          remI && !rem[--remI];
                            rem[remI] = base - 1 ) {
                        }
                        --rem[remI];
                        rem[remL] += base;
                    }
                    rem[remL] -= dvsT[remL];
                }
                for ( ; !rem[0]; rem.shift() ) {
                }
            } else {
                break;
            }
        }

        // Add the 'next' digit to the result array.
        qc[qi++] = cmp ? next : ++next;

        // Update the remainder.
        rem[0] && cmp
          ? ( rem[remL] = dvd[dvdI] || 0 )
          : ( rem = [ dvd[dvdI] ] );

    } while ( ( dvdI++ < dvdL || rem[0] != null ) && s-- );

    // Leading zero? Do not remove if result is simply zero (qi == 1).
    if ( !qc[0] && qi != 1 ) {

        // There can't be more than one zero.
        --quo['e'];
        qc.shift();
    }

    // Round?
    if ( qi > dig ) {
        rnd( quo, DECIMAL_PLACES, base, isOdd, rem[0] != null );
    }

    // Overflow?
    if ( quo['e'] > MAX_EXP ) {

        // Infinity.
        quo['c'] = quo['e'] = null;

    // Underflow?
    } else if ( quo['e'] < MIN_EXP ) {

        // Zero.
        quo['c'] = [quo['e'] = 0];
    }

    return quo;
}


/*
 * Return a string representing the value of BigNumber n in normal or
 * exponential notation rounded to the specified decimal places or
 * significant digits.
 * Called by toString, toExponential (exp 1), toFixed, and toPrecision (exp 2).
 * d is the index (with the value in normal notation) of the digit that may be
 * rounded up.
 */
function format( n, d, exp ) {

    // Initially, i is the number of decimal places required.
    var i = d - (n = new BigNumber(n))['e'],
        c = n['c'];

    // +-Infinity or NaN?
    if ( !c ) {
        return n['toS']();
    }

    // Round?
    if ( c.length > ++d ) {
        rnd( n, i, 10 );
    }

    // Recalculate d if toFixed as n['e'] may have changed if value rounded up.
    i = c[0] == 0 ? i + 1 : exp ? d : n['e'] + i + 1;

    // Append zeros?
    for ( ; c.length < i; c.push(0) ) {
    }
    i = n['e'];

    /*
     * toPrecision returns exponential notation if the number of significant
     * digits specified is less than the number of digits necessary to
     * represent the integer part of the value in normal notation.
     */
    return exp == 1 || exp == 2 && ( --d < i || i <= TO_EXP_NEG )

      // Exponential notation.
      ? ( n['s'] < 0 && c[0] ? '-' : '' ) + ( c.length > 1
        ? ( c.splice( 1, 0, '.' ), c.join('') )
        : c[0] ) + ( i < 0 ? 'e' : 'e+' ) + i

      // Normal notation.
      : n['toS']();
}


// Round if necessary.
// Called by divide, format, setMode and sqrt.
function rnd( x, dp, base, isOdd, r ) {
    var xc = x['c'],
        isNeg = x['s'] < 0,
        half = base / 2,
        i = x['e'] + dp + 1,

        // 'next' is the digit after the digit that may be rounded up.
        next = xc[i],

        /*
         * 'more' is whether there are digits after 'next'.
         * E.g.
         * 0.005 (e = -3) to be rounded to 0 decimal places (dp = 0) gives i = -2
         * The 'next' digit is zero, and there ARE 'more' digits after it.
         * 0.5 (e = -1) dp = 0 gives i = 0
         * The 'next' digit is 5 and there are no 'more' digits after it.
         */
        more = r || i < 0 || xc[i + 1] != null;

    r = ROUNDING_MODE < 4
      ? ( next != null || more ) &&
        ( ROUNDING_MODE == 0 ||
           ROUNDING_MODE == 2 && !isNeg ||
             ROUNDING_MODE == 3 && isNeg )
      : next > half || next == half &&
        ( ROUNDING_MODE == 4 || more ||

          /*
           * isOdd is used in base conversion and refers to the least significant
           * digit of the integer part of the value to be converted. The fraction
           * part is rounded by this method separately from the integer part.
           */
          ROUNDING_MODE == 6 && ( xc[i - 1] & 1 || !dp && isOdd ) ||
            ROUNDING_MODE == 7 && !isNeg ||
              ROUNDING_MODE == 8 && isNeg );

    if ( i < 1 || !xc[0] ) {
        xc.length = 0;
        xc.push(0);

        if ( r ) {

            // 1, 0.1, 0.01, 0.001, 0.0001 etc.
            xc[0] = 1;
            x['e'] = -dp;
        } else {

            // Zero.
            x['e'] = 0;
        }

        return x;
    }

    // Remove any digits after the required decimal places.
    xc.length = i--;

    // Round up?
    if ( r ) {

        // Rounding up may mean the previous digit has to be rounded up and so on.
        for ( --base; ++xc[i] > base; ) {
            xc[i] = 0;

            if ( !i-- ) {
                ++x['e'];
                xc.unshift(1);
            }
        }
    }

    // Remove trailing zeros.
    for ( i = xc.length; !xc[--i]; xc.pop() ) {
    }

    return x;
}


// Round after setting the appropriate rounding mode.
// Handles ceil, floor and round.
function setMode( x, dp, rm ) {
    var r = ROUNDING_MODE;

    ROUNDING_MODE = rm;
    x = new BigNumber(x);
    x['c'] && rnd( x, dp, 10 );
    ROUNDING_MODE = r;

    return x;
}


// PROTOTYPE/INSTANCE METHODS


/*
 * Return a new BigNumber whose value is the absolute value of this BigNumber.
 */
P['abs'] = P['absoluteValue'] = function () {
    var x = new BigNumber(this);

    if ( x['s'] < 0 ) {
        x['s'] = 1;
    }

    return x;
};

/*
 * Return the bit length of the number.
 */
P['bitLength'] = function () {
    return this.toString(2).length;
};


/*
 * Return a new BigNumber whose value is the value of this BigNumber
 * rounded to a whole number in the direction of Infinity.
 */
P['ceil'] = function () {
    return setMode( this, 0, 2 );
};


/*
 * Return
 * 1 if the value of this BigNumber is greater than the value of BigNumber(y, b),
 * -1 if the value of this BigNumber is less than the value of BigNumber(y, b),
 * 0 if they have the same value,
 * or null if the value of either is NaN.
 */
P['comparedTo'] = P['cmp'] = function ( y, b ) {
    var a,
        x = this,
        xc = x['c'],
        yc = ( id = -id, y = new BigNumber( y, b ) )['c'],
        i = x['s'],
        j = y['s'],
        k = x['e'],
        l = y['e'];

    // Either NaN?
    if ( !i || !j ) {
        return null;
    }

    a = xc && !xc[0], b = yc && !yc[0];

    // Either zero?
    if ( a || b ) {
        return a ? b ? 0 : -j : i;
    }

    // Signs differ?
    if ( i != j ) {
        return i;
    }

    // Either Infinity?
    if ( a = i < 0, b = k == l, !xc || !yc ) {
        return b ? 0 : !xc ^ a ? 1 : -1;
    }

    // Compare exponents.
    if ( !b ) {
        return k > l ^ a ? 1 : -1;
    }

    // Compare digit by digit.
    for ( i = -1,
          j = ( k = xc.length ) < ( l = yc.length ) ? k : l;
          ++i < j; ) {

        if ( xc[i] != yc[i] ) {
            return xc[i] > yc[i] ^ a ? 1 : -1;
        }
    }
    // Compare lengths.
    return k == l ? 0 : k > l ^ a ? 1 : -1;
};


/*
 *  n / 0 = I
 *  n / N = N
 *  n / I = 0
 *  0 / n = 0
 *  0 / 0 = N
 *  0 / N = N
 *  0 / I = 0
 *  N / n = N
 *  N / 0 = N
 *  N / N = N
 *  N / I = N
 *  I / n = I
 *  I / 0 = I
 *  I / N = N
 *  I / I = N
 *
 * Return a new BigNumber whose value is the value of this BigNumber
 * divided by the value of BigNumber(y, b), rounded according to
 * DECIMAL_PLACES and ROUNDING_MODE.
 */
P['dividedBy'] = P['div'] = function ( y, b ) {
    var xc = this['c'],
        xe = this['e'],
        xs = this['s'],
        yc = ( id = 2, y = new BigNumber( y, b ) )['c'],
        ye = y['e'],
        ys = y['s'],
        s = xs == ys ? 1 : -1;

    // Either NaN/Infinity/0?
    return !xe && ( !xc || !xc[0] ) || !ye && ( !yc || !yc[0] )

      // Either NaN?
      ? new BigNumber( !xs || !ys ||

        // Both 0 or both Infinity?
        ( xc ? yc && xc[0] == yc[0] : !yc )

          // Return NaN.
          ? NaN

          // x is 0 or y is Infinity?
          : xc && xc[0] == 0 || !yc

            // Return +-0.
            ? s * 0

            // y is 0. Return +-Infinity.
            : s / 0 )

      : divide( xc, yc, xe - ye, s, 10 );
};


/*
 * Return true if the value of this BigNumber is equal to the value of
 * BigNumber(n, b), otherwise returns false.
 */
P['equals'] = P['eq'] = function ( n, b ) {
    id = 3;
    return this['cmp']( n, b ) === 0;
};


/*
 * Return a new BigNumber whose value is the value of this BigNumber
 * rounded to a whole number in the direction of -Infinity.
 */
P['floor'] = function () {
    return setMode( this, 0, 3 );
};


/*
 * Return true if the value of this BigNumber is greater than the value of
 * BigNumber(n, b), otherwise returns false.
 */
P['greaterThan'] = P['gt'] = function ( n, b ) {
    id = 4;
    return this['cmp']( n, b ) > 0;
};


/*
 * Return true if the value of this BigNumber is greater than or equal to
 * the value of BigNumber(n, b), otherwise returns false.
 */
P['greaterThanOrEqualTo'] = P['gte'] = P['gt'] = function ( n, b ) {
    id = 5;
    return ( b = this['cmp']( n, b ) ) == 1 || b === 0;
};


/*
 * Return true if the value of this BigNumber is a finite number, otherwise
 * returns false.
 */
P['isFinite'] = P['isF'] = function () {
    return !!this['c'];
};


/*
 * Return true if the value of this BigNumber is NaN, otherwise returns
 * false.
 */
P['isNaN'] = function () {
    return !this['s'];
};


/*
 * Return true if the value of this BigNumber is negative, otherwise
 * returns false.
 */
P['isNegative'] = P['isNeg'] = function () {
    return this['s'] < 0;
};


/*
 * Return true if the value of this BigNumber is 0 or -0, otherwise returns
 * false.
 */
P['isZero'] = P['isZ'] = function () {
    return !!this['c'] && this['c'][0] == 0;
};


/*
 * Return true if the value of this BigNumber is less than the value of
 * BigNumber(n, b), otherwise returns false.
 */
P['lessThan'] = P['lt'] = function ( n, b ) {
    id = 6;
    return this['cmp']( n, b ) < 0;
};


/*
 * Return true if the value of this BigNumber is less than or equal to the
 * value of BigNumber(n, b), otherwise returns false.
 */
P['lessThanOrEqualTo'] = P['lte'] = P['le'] = function ( n, b ) {
    id = 7;
    return ( b = this['cmp']( n, b ) ) == -1 || b === 0;
};


/*
 *  n - 0 = n
 *  n - N = N
 *  n - I = -I
 *  0 - n = -n
 *  0 - 0 = 0
 *  0 - N = N
 *  0 - I = -I
 *  N - n = N
 *  N - 0 = N
 *  N - N = N
 *  N - I = N
 *  I - n = I
 *  I - 0 = I
 *  I - N = N
 *  I - I = N
 *
 * Return a new BigNumber whose value is the value of this BigNumber minus
 * the value of BigNumber(y, b).
 */
P['minus'] = P['sub'] = function ( y, b ) {
    var d, i, j, xLTy,
        x = this,
        a = x['s'];

    b = ( id = 8, y = new BigNumber( y, b ) )['s'];

    // Either NaN?
    if ( !a || !b ) {
        return new BigNumber(NaN);
    }

    // Signs differ?
    if ( a != b ) {
        return y['s'] = -b, x['plus'](y);
    }

    var xc = x['c'],
        xe = x['e'],
        yc = y['c'],
        ye = y['e'];

    if ( !xe || !ye ) {

        // Either Infinity?
        if ( !xc || !yc ) {
            return xc ? ( y['s'] = -b, y ) : new BigNumber( yc ? x : NaN );
        }

        // Either zero?
        if ( !xc[0] || !yc[0] ) {

            // y is non-zero?
            return yc[0]
              ? ( y['s'] = -b, y )

              // x is non-zero?
              : new BigNumber( xc[0]
                ? x

                // Both are zero.
                // IEEE 754 (2008) 6.3: n - n = -0 when rounding to -Infinity
                : ROUNDING_MODE == 3 ? -0 : 0 );
        }
    }

    // Determine which is the bigger number.
    // Prepend zeros to equalise exponents.
    if ( xc = xc.slice(), a = xe - ye ) {
        d = ( xLTy = a < 0 ) ? ( a = -a, xc ) : ( ye = xe, yc );

        for ( d.reverse(), b = a; b--; d.push(0) ) {
        }
        d.reverse();
    } else {

        // Exponents equal. Check digit by digit.
        j = ( ( xLTy = xc.length < yc.length ) ? xc : yc ).length;

        for ( a = b = 0; b < j; b++ ) {

            if ( xc[b] != yc[b] ) {
                xLTy = xc[b] < yc[b];
                break;
            }
        }
    }

    // x < y? Point xc to the array of the bigger number.
    if ( xLTy ) {
        d = xc, xc = yc, yc = d;
        y['s'] = -y['s'];
    }

    /*
     * Append zeros to xc if shorter. No need to add zeros to yc if shorter
     * as subtraction only needs to start at yc.length.
     */
    if ( ( b = -( ( j = xc.length ) - yc.length ) ) > 0 ) {

        for ( ; b--; xc[j++] = 0 ) {
        }
    }

    // Subtract yc from xc.
    for ( b = yc.length; b > a; ){

        if ( xc[--b] < yc[b] ) {

            for ( i = b; i && !xc[--i]; xc[i] = 9 ) {
            }
            --xc[i];
            xc[b] += 10;
        }
        xc[b] -= yc[b];
    }

    // Remove trailing zeros.
    for ( ; xc[--j] == 0; xc.pop() ) {
    }

    // Remove leading zeros and adjust exponent accordingly.
    for ( ; xc[0] == 0; xc.shift(), --ye ) {
    }

    /*
     * No need to check for Infinity as +x - +y != Infinity && -x - -y != Infinity
     * when neither x or y are Infinity.
     */

    // Underflow?
    if ( ye < MIN_EXP || !xc[0] ) {

        /*
         * Following IEEE 754 (2008) 6.3,
         * n - n = +0  but  n - n = -0 when rounding towards -Infinity.
         */
        if ( !xc[0] ) {
            y['s'] = ROUNDING_MODE == 3 ? -1 : 1;
        }

        // Result is zero.
        xc = [ye = 0];
    }

    return y['c'] = xc, y['e'] = ye, y;
};


/*
 *   n % 0 =  N
 *   n % N =  N
 *   0 % n =  0
 *  -0 % n = -0
 *   0 % 0 =  N
 *   0 % N =  N
 *   N % n =  N
 *   N % 0 =  N
 *   N % N =  N
 *
 * Return a new BigNumber whose value is the value of this BigNumber modulo
 * the value of BigNumber(y, b).
 */
P['modulo'] = P['mod'] = function ( y, b ) {
    var x = this,
        xc = x['c'],
        yc = ( id = 9, y = new BigNumber( y, b ) )['c'],
        i = x['s'],
        j = y['s'];

    // Is x or y NaN, or y zero?
    b = !i || !j || yc && !yc[0];

    if ( b || xc && !xc[0] ) {
        return new BigNumber( b ? NaN : x );
    }

    x['s'] = y['s'] = 1;
    b = y['cmp'](x) == 1;
    x['s'] = i, y['s'] = j;

    return b
      ? new BigNumber(x)
      : ( i = DECIMAL_PLACES, j = ROUNDING_MODE,
        DECIMAL_PLACES = 0, ROUNDING_MODE = 1,
          x = x['div'](y),
            DECIMAL_PLACES = i, ROUNDING_MODE = j,
              this['minus']( x['times'](y) ) );
};


/*
 * Return a new BigNumber whose value is the value of this BigNumber
 * negated, i.e. multiplied by -1.
 */
P['negated'] = P['neg'] = function () {
    var x = new BigNumber(this);

    return x['s'] = -x['s'] || null, x;
};


/*
 *  n + 0 = n
 *  n + N = N
 *  n + I = I
 *  0 + n = n
 *  0 + 0 = 0
 *  0 + N = N
 *  0 + I = I
 *  N + n = N
 *  N + 0 = N
 *  N + N = N
 *  N + I = N
 *  I + n = I
 *  I + 0 = I
 *  I + N = N
 *  I + I = I
 *
 * Return a new BigNumber whose value is the value of this BigNumber plus
 * the value of BigNumber(y, b).
 */
P['plus'] = P['add'] = function ( y, b ) {
    var d,
        x = this,
        a = x['s'];

    b = ( id = 10, y = new BigNumber( y, b ) )['s'];

    // Either NaN?
    if ( !a || !b ) {
        return new BigNumber(NaN);
    }

    // Signs differ?
    if ( a != b ) {
        return y['s'] = -b, x['minus'](y);
    }

    var xe = x['e'],
        xc = x['c'],
        ye = y['e'],
        yc = y['c'];

    if ( !xe || !ye ) {

        // Either Infinity?
        if ( !xc || !yc ) {

            // Return +-Infinity.
            return new BigNumber( a / 0 );
        }

        // Either zero?
        if ( !xc[0] || !yc[0] ) {

            // y is non-zero?
            return yc[0]
              ? y

              // x is non-zero?
              : new BigNumber( xc[0]
                ? x

                // Both are zero. Return zero.
                : a * 0 );
        }
    }

    // Prepend zeros to equalise exponents.
    // Note: Faster to use reverse then do unshifts.
    if ( xc = xc.slice(), a = xe - ye ) {
        d = a > 0 ? ( ye = xe, yc ) : ( a = -a, xc );

        for ( d.reverse(); a--; d.push(0) ) {
        }
        d.reverse();
    }

    // Point xc to the longer array.
    if ( xc.length - yc.length < 0 ) {
        d = yc, yc = xc, xc = d;
    }

    /*
     * Only start adding at yc.length - 1 as the
     * further digits of xc can be left as they are.
     */
    for ( a = yc.length, b = 0; a;
         b = ( xc[--a] = xc[a] + yc[a] + b ) / 10 ^ 0, xc[a] %= 10 ) {
    }

    // No need to check for zero, as +x + +y != 0 && -x + -y != 0

    if ( b ) {
        xc.unshift(b);

        // Overflow? (MAX_EXP + 1 possible)
        if ( ++ye > MAX_EXP ) {

            // Infinity.
            xc = ye = null;
        }
    }

     // Remove trailing zeros.
    for ( a = xc.length; xc[--a] == 0; xc.pop() ) {
    }

    return y['c'] = xc, y['e'] = ye, y;
};


/*
 * Return a BigNumber whose value is the value of this BigNumber raised to
 * the power e. If e is negative round according to DECIMAL_PLACES and
 * ROUNDING_MODE.
 *
 * e {number} Integer, -MAX_POWER to MAX_POWER inclusive.
 */
P['toPower'] = P['pow'] = function ( e ) {

    // e to integer, avoiding NaN or Infinity becoming 0.
    var i = e * 0 == 0 ? e | 0 : e,
        x = new BigNumber(this),
        y = new BigNumber(ONE);

    // Use Math.pow?
    // Pass +-Infinity for out of range exponents.
    if ( ( ( ( outOfRange = e < -MAX_POWER || e > MAX_POWER ) &&
      (i = e * 1 / 0) ) ||

         /*
          * Any exponent that fails the parse becomes NaN.
          *
          * Include 'e !== 0' because on Opera -0 == parseFloat(-0) is false,
          * despite -0 === parseFloat(-0) && -0 == parseFloat('-0') is true.
          */
         parse(e) != e && e !== 0 && !(i = NaN) ) &&

          // 'pow() exponent not an integer: {e}'
          // 'pow() exponent out of range: {e}'
          !ifExceptionsThrow( e, 'exponent', 'pow' ) ||

            // Pass zero to Math.pow, as any value to the power zero is 1.
            !i ) {

        // i is +-Infinity, NaN or 0.
        return new BigNumber( Math.pow( x['toS'](), i ) );
    }

    for ( i = i < 0 ? -i : i; ; ) {

        if ( i & 1 ) {
            y = y['times'](x);
        }
        i >>= 1;

        if ( !i ) {
            break;
        }
        x = x['times'](x);
    }

    return e < 0 ? ONE['div'](y) : y;
};


/*
 * Return a BigNumber whose value is the value of this BigNumber raised to
 * the power m modulo n.
 *
 * m {BigNumber} the value to take the power of
 * n {BigNumber} the value to modulo by
 */
P['powm'] = function ( m, n ) {
    return this.pow(m).mod(n);
};


/*
 * Return a new BigNumber whose value is the value of this BigNumber
 * rounded to a maximum of dp decimal places using rounding mode rm, or to
 * 0 and ROUNDING_MODE respectively if omitted.
 *
 * [dp] {number} Integer, 0 to MAX inclusive.
 * [rm] {number} Integer, 0 to 8 inclusive.
 */
P['round'] = function ( dp, rm ) {

    dp = dp == null || ( ( ( outOfRange = dp < 0 || dp > MAX ) ||
      parse(dp) != dp ) &&

        // 'round() decimal places out of range: {dp}'
        // 'round() decimal places not an integer: {dp}'
        !ifExceptionsThrow( dp, 'decimal places', 'round' ) )
          ? 0
          : dp | 0;

    rm = rm == null || ( ( ( outOfRange = rm < 0 || rm > 8 ) ||

      // Include '&& rm !== 0' because with Opera -0 == parseFloat(-0) is false.
      parse(rm) != rm && rm !== 0 ) &&

        // 'round() mode not an integer: {rm}'
        // 'round() mode out of range: {rm}'
        !ifExceptionsThrow( rm, 'mode', 'round' ) )
          ? ROUNDING_MODE
          : rm | 0;

    return setMode( this, dp, rm );
};


/*
 *  sqrt(-n) =  N
 *  sqrt( N) =  N
 *  sqrt(-I) =  N
 *  sqrt( I) =  I
 *  sqrt( 0) =  0
 *  sqrt(-0) = -0
 *
 * Return a new BigNumber whose value is the square root of the value of
 * this BigNumber, rounded according to DECIMAL_PLACES and ROUNDING_MODE.
 */
P['squareRoot'] = P['sqrt'] = function () {
    var n, r, re, t,
        x = this,
        c = x['c'],
        s = x['s'],
        e = x['e'],
        dp = DECIMAL_PLACES,
        rm = ROUNDING_MODE,
        half = new BigNumber('0.5');

    // Negative/NaN/Infinity/zero?
    if ( s !== 1 || !c || !c[0] ) {

        return new BigNumber( !s || s < 0 && ( !c || c[0] )
          ? NaN
          : c ? x : 1 / 0 );
    }

    // Initial estimate.
    s = Math.sqrt( x['toS']() );
    ROUNDING_MODE = 1;

    /*
      Math.sqrt underflow/overflow?
      Pass x to Math.sqrt as integer, then adjust the exponent of the result.
     */
    if ( s == 0 || s == 1 / 0 ) {
        n = c.join('');

        if ( !( n.length + e & 1 ) ) {
            n += '0';
        }
        r = new BigNumber( Math.sqrt(n) + '' );

        // r may still not be finite.
        if ( !r['c'] ) {
            r['c'] = [1];
        }
        r['e'] = ( ( ( e + 1 ) / 2 ) | 0 ) - ( e < 0 || e & 1 );
    } else {
        r = new BigNumber( n = s.toString() );
    }
    re = r['e'];
    s = re + ( DECIMAL_PLACES += 4 );

    if ( s < 3 ) {
        s = 0;
    }
    e = s;

    // Newton-Raphson iteration.
    for ( ; ; ) {
        t = r;
        r = half['times']( t['plus']( x['div'](t) ) );

        if ( t['c'].slice( 0, s ).join('') === r['c'].slice( 0, s ).join('') ) {
            c = r['c'];

            /*
              The exponent of r may here be one less than the final result
              exponent (re), e.g 0.0009999 (e-4) --> 0.001 (e-3), so adjust
              s so the rounding digits are indexed correctly.
             */
            s = s - ( n && r['e'] < re );

            /*
              The 4th rounding digit may be in error by -1 so if the 4 rounding
              digits are 9999 or 4999 (i.e. approaching a rounding boundary)
              continue the iteration.
             */
            if ( c[s] == 9 && c[s - 1] == 9 && c[s - 2] == 9 &&
                    ( c[s - 3] == 9 || n && c[s - 3] == 4 ) ) {

                /*
                  If 9999 on first run through, check to see if rounding up
                  gives the exact result as the nines may infinitely repeat.
                 */
                if ( n && c[s - 3] == 9 ) {
                    t = r['round']( dp, 0 );

                    if ( t['times'](t)['eq'](x) ) {
                        ROUNDING_MODE = rm;
                        DECIMAL_PLACES = dp;

                        return t;
                    }
                }
                DECIMAL_PLACES += 4;
                s += 4;
                n = '';
            } else {

                /*
                  If the rounding digits are null, 0000 or 5000, check for an
                  exact result. If not, then there are further digits so
                  increment the 1st rounding digit to ensure correct rounding.
                 */
                if ( !c[e] && !c[e - 1] && !c[e - 2] &&
                        ( !c[e - 3] || c[e - 3] == 5 ) ) {

                    // Truncate to the first rounding digit.
                    if ( c.length > e - 2 ) {
                        c.length = e - 2;
                    }

                    if ( !r['times'](r)['eq'](x) ) {

                        while ( c.length < e - 3 ) {
                            c.push(0);
                        }
                        c[e - 3]++;
                    }
                }
                ROUNDING_MODE = rm;
                rnd( r, DECIMAL_PLACES = dp, 10 );

                return r;
            }
        }
    }
};


/*
 *  n * 0 = 0
 *  n * N = N
 *  n * I = I
 *  0 * n = 0
 *  0 * 0 = 0
 *  0 * N = N
 *  0 * I = N
 *  N * n = N
 *  N * 0 = N
 *  N * N = N
 *  N * I = N
 *  I * n = I
 *  I * 0 = N
 *  I * N = N
 *  I * I = I
 *
 * Return a new BigNumber whose value is the value of this BigNumber times
 * the value of BigNumber(y, b).
 */
P['times'] = P['mul'] = function ( y, b ) {
    var c,
        x = this,
        xc = x['c'],
        yc = ( id = 11, y = new BigNumber( y, b ) )['c'],
        i = x['e'],
        j = y['e'],
        a = x['s'];

    y['s'] = a == ( b = y['s'] ) ? 1 : -1;

    // Either NaN/Infinity/0?
    if ( !i && ( !xc || !xc[0] ) || !j && ( !yc || !yc[0] ) ) {

        // Either NaN?
        return new BigNumber( !a || !b ||

          // x is 0 and y is Infinity  or  y is 0 and x is Infinity?
          xc && !xc[0] && !yc || yc && !yc[0] && !xc

            // Return NaN.
            ? NaN

            // Either Infinity?
            : !xc || !yc

              // Return +-Infinity.
              ? y['s'] / 0

              // x or y is 0. Return +-0.
              : y['s'] * 0 );
    }
    y['e'] = i + j;

    if ( ( a = xc.length ) < ( b = yc.length ) ) {
        c = xc, xc = yc, yc = c, j = a, a = b, b = j;
    }

    for ( j = a + b, c = []; j--; c.push(0) ) {
    }

    // Multiply!
    for ( i = b - 1; i > -1; i-- ) {

        for ( b = 0, j = a + i;
              j > i;
              b = c[j] + yc[i] * xc[j - i - 1] + b,
              c[j--] = b % 10 | 0,
              b = b / 10 | 0 ) {
        }

        if ( b ) {
            c[j] = ( c[j] + b ) % 10;
        }
    }

    b && ++y['e'];

    // Remove any leading zero.
    !c[0] && c.shift();

    // Remove trailing zeros.
    for ( j = c.length; !c[--j]; c.pop() ) {
    }

    // No zero check needed as only x * 0 == 0 etc.

    // Overflow?
    y['c'] = y['e'] > MAX_EXP

      // Infinity.
      ? ( y['e'] = null )

      // Underflow?
      : y['e'] < MIN_EXP

        // Zero.
        ? [ y['e'] = 0 ]

        // Neither.
        : c;

    return y;
};

/*
 * Return a buffer containing the 
 */
P['toBuffer'] = function ( opts ) {

    if (typeof opts === 'string') {
        if (opts !== 'mpint') return 'Unsupported Buffer representation';

        var abs = this.abs();
        var buf = abs.toBuffer({ size : 1, endian : 'big' });
        var len = buf.length === 1 && buf[0] === 0 ? 0 : buf.length;
        if (buf[0] & 0x80) len ++;

        var ret = new Buffer(4 + len);
        if (len > 0) buf.copy(ret, 4 + (buf[0] & 0x80 ? 1 : 0));
        if (buf[0] & 0x80) ret[4] = 0;

        ret[0] = len & (0xff << 24);
        ret[1] = len & (0xff << 16);
        ret[2] = len & (0xff << 8);
        ret[3] = len & (0xff << 0);

        // two's compliment for negative integers:
        var isNeg = this.lt(0);
        if (isNeg) {
            for (var i = 4; i < ret.length; i++) {
                ret[i] = 0xff - ret[i];
            }
        }
        ret[4] = (ret[4] & 0x7f) | (isNeg ? 0x80 : 0);
        if (isNeg) ret[ret.length - 1] ++;

        return ret;
    }

    if (!opts) opts = {};

    var endian = { 1 : 'big', '-1' : 'little' }[opts.endian]
        || opts.endian || 'big'
    ;

    var hex = this.toString(16);
    if (hex.charAt(0) === '-') throw new Error(
        'converting negative numbers to Buffers not supported yet'
    );

    var size = opts.size === 'auto' ? Math.ceil(hex.length / 2) : (opts.size || 1);

    var len = Math.ceil(hex.length / (2 * size)) * size;
    var buf = new Buffer(len);

    // zero-pad the hex string so the chunks are all `size` long
    while (hex.length < 2 * len) hex = '0' + hex;

    var hx = hex
        .split(new RegExp('(.{' + (2 * size) + '})'))
        .filter(function (s) { return s.length > 0 })
    ;

    hx.forEach(function (chunk, i) {
        for (var j = 0; j < size; j++) {
            var ix = i * size + (endian === 'big' ? j : size - j - 1);
            buf[ix] = parseInt(chunk.slice(j*2,j*2+2), 16);
        }
    });

    return buf;
};

/*
 * Return a string representing the value of this BigNumber in exponential
 * notation to dp fixed decimal places and rounded using ROUNDING_MODE if
 * necessary.
 *
 * [dp] {number} Integer, 0 to MAX inclusive.
 */
P['toExponential'] = P['toE'] = function ( dp ) {

    return format( this,
      ( dp == null || ( ( outOfRange = dp < 0 || dp > MAX ) ||

        /*
         * Include '&& dp !== 0' because with Opera -0 == parseFloat(-0) is
         * false, despite -0 == parseFloat('-0') && 0 == -0 being true.
         */
        parse(dp) != dp && dp !== 0 ) &&

          // 'toE() decimal places not an integer: {dp}'
          // 'toE() decimal places out of range: {dp}'
          !ifExceptionsThrow( dp, 'decimal places', 'toE' ) ) && this['c']
            ? this['c'].length - 1
            : dp | 0, 1 );
};


/*
 * Return a string representing the value of this BigNumber in normal
 * notation to dp fixed decimal places and rounded using ROUNDING_MODE if
 * necessary.
 *
 * Note: as with JavaScript's number type, (-0).toFixed(0) is '0',
 * but e.g. (-0.00001).toFixed(0) is '-0'.
 *
 * [dp] {number} Integer, 0 to MAX inclusive.
 */
P['toFixed'] = P['toF'] = function ( dp ) {
    var n, str, d,
        x = this;

    if ( !( dp == null || ( ( outOfRange = dp < 0 || dp > MAX ) ||
        parse(dp) != dp && dp !== 0 ) &&

        // 'toF() decimal places not an integer: {dp}'
        // 'toF() decimal places out of range: {dp}'
        !ifExceptionsThrow( dp, 'decimal places', 'toF' ) ) ) {
          d = x['e'] + ( dp | 0 );
    }

    n = TO_EXP_NEG, dp = TO_EXP_POS;
    TO_EXP_NEG = -( TO_EXP_POS = 1 / 0 );

    // Note: str is initially undefined.
    if ( d == str ) {
        str = x['toS']();
    } else {
        str = format( x, d );

        // (-0).toFixed() is '0', but (-0.1).toFixed() is '-0'.
        // (-0).toFixed(1) is '0.0', but (-0.01).toFixed(1) is '-0.0'.
        if ( x['s'] < 0 && x['c'] ) {

            // As e.g. -0 toFixed(3), will wrongly be returned as -0.000 from toString.
            if ( !x['c'][0] ) {
                str = str.replace(/^-/, '');

            // As e.g. -0.5 if rounded to -0 will cause toString to omit the minus sign.
            } else if ( str.indexOf('-') < 0 ) {
                str = '-' + str;
            }
        }
    }
    TO_EXP_NEG = n, TO_EXP_POS = dp;

    return str;
};


/*
 * Return a string array representing the value of this BigNumber as a
 * simple fraction with an integer numerator and an integer denominator.
 * The denominator will be a positive non-zero value less than or equal to
 * the specified maximum denominator. If a maximum denominator is not
 * specified, the denominator will be the lowest value necessary to
 * represent the number exactly.
 *
 * [maxD] {number|string|BigNumber} Integer >= 1 and < Infinity.
 */
P['toFraction'] = P['toFr'] = function ( maxD ) {
    var q, frac, n0, d0, d2, n, e,
        n1 = d0 = new BigNumber(ONE),
        d1 = n0 = new BigNumber('0'),
        x = this,
        xc = x['c'],
        exp = MAX_EXP,
        dp = DECIMAL_PLACES,
        rm = ROUNDING_MODE,
        d = new BigNumber(ONE);

    // NaN, Infinity.
    if ( !xc ) {
        return x['toS']();
    }

    e = d['e'] = xc.length - x['e'] - 1;

    // If max denominator is undefined or null...
    if ( maxD == null ||

         // or NaN...
         ( !( id = 12, n = new BigNumber(maxD) )['s'] ||

           // or less than 1, or Infinity...
           ( outOfRange = n['cmp'](n1) < 0 || !n['c'] ) ||

             // or not an integer...
             ( ERRORS && n['e'] < n['c'].length - 1 ) ) &&

               // 'toFr() max denominator not an integer: {maxD}'
               // 'toFr() max denominator out of range: {maxD}'
               !ifExceptionsThrow( maxD, 'max denominator', 'toFr' ) ||

                 // or greater than the maxD needed to specify the value exactly...
                 ( maxD = n )['cmp'](d) > 0 ) {

        // d is e.g. 10, 100, 1000, 10000... , n1 is 1.
        maxD = e > 0 ? d : n1;
    }

    MAX_EXP = 1 / 0;
    n = new BigNumber( xc.join('') );

    for ( DECIMAL_PLACES = 0, ROUNDING_MODE = 1; ; )  {
        q = n['div'](d);
        d2 = d0['plus']( q['times'](d1) );

        if ( d2['cmp'](maxD) == 1 ) {
            break;
        }

        d0 = d1, d1 = d2;

        n1 = n0['plus']( q['times']( d2 = n1 ) );
        n0 = d2;

        d = n['minus']( q['times']( d2 = d ) );
        n = d2;
    }

    d2 = maxD['minus'](d0)['div'](d1);
    n0 = n0['plus']( d2['times'](n1) );
    d0 = d0['plus']( d2['times'](d1) );

    n0['s'] = n1['s'] = x['s'];

    DECIMAL_PLACES = e * 2;
    ROUNDING_MODE = rm;

    // Determine which fraction is closer to x, n0 / d0 or n1 / d1?
    frac = n1['div'](d1)['minus'](x)['abs']()['cmp'](
      n0['div'](d0)['minus'](x)['abs']() ) < 1
      ? [ n1['toS'](), d1['toS']() ]
      : [ n0['toS'](), d0['toS']() ];

    return MAX_EXP = exp, DECIMAL_PLACES = dp, frac;
};


/*
 * Return a string representing the value of this BigNumber to sd significant
 * digits and rounded using ROUNDING_MODE if necessary.
 * If sd is less than the number of digits necessary to represent the integer
 * part of the value in normal notation, then use exponential notation.
 *
 * sd {number} Integer, 1 to MAX inclusive.
 */
P['toPrecision'] = P['toP'] = function ( sd ) {

    /*
     * ERRORS true: Throw if sd not undefined, null or an integer in range.
     * ERRORS false: Ignore sd if not a number or not in range.
     * Truncate non-integers.
     */
    return sd == null || ( ( ( outOfRange = sd < 1 || sd > MAX ) ||
      parse(sd) != sd ) &&

        // 'toP() precision not an integer: {sd}'
        // 'toP() precision out of range: {sd}'
        !ifExceptionsThrow( sd, 'precision', 'toP' ) )
          ? this['toS']()
          : format( this, --sd | 0, 2 );
};


/*
 * Return a string representing the value of this BigNumber in base b, or
 * base 10 if b is omitted. If a base is specified, including base 10,
 * round according to DECIMAL_PLACES and ROUNDING_MODE.
 * If a base is not specified, and this BigNumber has a positive exponent
 * that is equal to or greater than TO_EXP_POS, or a negative exponent equal
 * to or less than TO_EXP_NEG, return exponential notation.
 *
 * [b] {number} Integer, 2 to 64 inclusive.
 */
P['toString'] = P['toS'] = function ( b ) {
    var u, str, strL,
        x = this,
        xe = x['e'];

    // Infinity or NaN?
    if ( xe === null ) {
        str = x['s'] ? 'Infinity' : 'NaN';

    // Exponential format?
    } else if ( b === u && ( xe <= TO_EXP_NEG || xe >= TO_EXP_POS ) ) {
        return format( x, x['c'].length - 1, 1 );
    } else {
        str = x['c'].join('');

        // Negative exponent?
        if ( xe < 0 ) {

            // Prepend zeros.
            for ( ; ++xe; str = '0' + str ) {
            }
            str = '0.' + str;

        // Positive exponent?
        } else if ( strL = str.length, xe > 0 ) {

            if ( ++xe > strL ) {

                // Append zeros.
                for ( xe -= strL; xe-- ; str += '0' ) {
                }
            } else if ( xe < strL ) {
                str = str.slice( 0, xe ) + '.' + str.slice(xe);
            }

        // Exponent zero.
        } else {
            if ( u = str.charAt(0), strL > 1 ) {
                str = u + '.' + str.slice(1);

            // Avoid '-0'
            } else if ( u == '0' ) {
                return u;
            }
        }

        if ( b != null ) {

            if ( !( outOfRange = !( b >= 2 && b < 65 ) ) &&
              ( b == (b | 0) || !ERRORS ) ) {
                str = convert( str, b | 0, 10, x['s'] );

                // Avoid '-0'
                if ( str == '0' ) {
                    return str;
                }
            } else {

                // 'toS() base not an integer: {b}'
                // 'toS() base out of range: {b}'
                ifExceptionsThrow( b, 'base', 'toS' );
            }
        }

    }

    return x['s'] < 0 ? '-' + str : str;
};


/*
 * Return as toString, but do not accept a base argument.
 */
P['valueOf'] = function () {
    return this['toS']();
};


// Add aliases for BigDecimal methods.
//P['add'] = P['plus'];
//P['subtract'] = P['minus'];
//P['multiply'] = P['times'];
//P['divide'] = P['div'];
//P['remainder'] = P['mod'];
//P['compareTo'] = P['cmp'];
//P['negate'] = P['neg'];


// EXPORT
module.exports = BigNumber;

}).call(this,require("buffer").Buffer)
},{"buffer":24}],24:[function(require,module,exports){
(function (global){
/*!
 * The buffer module from node.js, for the browser.
 *
 * @author   Feross Aboukhadijeh <feross@feross.org> <http://feross.org>
 * @license  MIT
 */
/* eslint-disable no-proto */

'use strict'

var base64 = require('base64-js')
var ieee754 = require('ieee754')
var isArray = require('isarray')

exports.Buffer = Buffer
exports.SlowBuffer = SlowBuffer
exports.INSPECT_MAX_BYTES = 50

/**
 * If `Buffer.TYPED_ARRAY_SUPPORT`:
 *   === true    Use Uint8Array implementation (fastest)
 *   === false   Use Object implementation (most compatible, even IE6)
 *
 * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,
 * Opera 11.6+, iOS 4.2+.
 *
 * Due to various browser bugs, sometimes the Object implementation will be used even
 * when the browser supports typed arrays.
 *
 * Note:
 *
 *   - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,
 *     See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.
 *
 *   - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.
 *
 *   - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of
 *     incorrect length in some situations.

 * We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they
 * get the Object implementation, which is slower but behaves correctly.
 */
Buffer.TYPED_ARRAY_SUPPORT = global.TYPED_ARRAY_SUPPORT !== undefined
  ? global.TYPED_ARRAY_SUPPORT
  : typedArraySupport()

/*
 * Export kMaxLength after typed array support is determined.
 */
exports.kMaxLength = kMaxLength()

function typedArraySupport () {
  try {
    var arr = new Uint8Array(1)
    arr.__proto__ = {__proto__: Uint8Array.prototype, foo: function () { return 42 }}
    return arr.foo() === 42 && // typed array instances can be augmented
        typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray`
        arr.subarray(1, 1).byteLength === 0 // ie10 has broken `subarray`
  } catch (e) {
    return false
  }
}

function kMaxLength () {
  return Buffer.TYPED_ARRAY_SUPPORT
    ? 0x7fffffff
    : 0x3fffffff
}

function createBuffer (that, length) {
  if (kMaxLength() < length) {
    throw new RangeError('Invalid typed array length')
  }
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    // Return an augmented `Uint8Array` instance, for best performance
    that = new Uint8Array(length)
    that.__proto__ = Buffer.prototype
  } else {
    // Fallback: Return an object instance of the Buffer class
    if (that === null) {
      that = new Buffer(length)
    }
    that.length = length
  }

  return that
}

/**
 * The Buffer constructor returns instances of `Uint8Array` that have their
 * prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of
 * `Uint8Array`, so the returned instances will have all the node `Buffer` methods
 * and the `Uint8Array` methods. Square bracket notation works as expected -- it
 * returns a single octet.
 *
 * The `Uint8Array` prototype remains unmodified.
 */

function Buffer (arg, encodingOrOffset, length) {
  if (!Buffer.TYPED_ARRAY_SUPPORT && !(this instanceof Buffer)) {
    return new Buffer(arg, encodingOrOffset, length)
  }

  // Common case.
  if (typeof arg === 'number') {
    if (typeof encodingOrOffset === 'string') {
      throw new Error(
        'If encoding is specified then the first argument must be a string'
      )
    }
    return allocUnsafe(this, arg)
  }
  return from(this, arg, encodingOrOffset, length)
}

Buffer.poolSize = 8192 // not used by this implementation

// TODO: Legacy, not needed anymore. Remove in next major version.
Buffer._augment = function (arr) {
  arr.__proto__ = Buffer.prototype
  return arr
}

function from (that, value, encodingOrOffset, length) {
  if (typeof value === 'number') {
    throw new TypeError('"value" argument must not be a number')
  }

  if (typeof ArrayBuffer !== 'undefined' && value instanceof ArrayBuffer) {
    return fromArrayBuffer(that, value, encodingOrOffset, length)
  }

  if (typeof value === 'string') {
    return fromString(that, value, encodingOrOffset)
  }

  return fromObject(that, value)
}

/**
 * Functionally equivalent to Buffer(arg, encoding) but throws a TypeError
 * if value is a number.
 * Buffer.from(str[, encoding])
 * Buffer.from(array)
 * Buffer.from(buffer)
 * Buffer.from(arrayBuffer[, byteOffset[, length]])
 **/
Buffer.from = function (value, encodingOrOffset, length) {
  return from(null, value, encodingOrOffset, length)
}

if (Buffer.TYPED_ARRAY_SUPPORT) {
  Buffer.prototype.__proto__ = Uint8Array.prototype
  Buffer.__proto__ = Uint8Array
  if (typeof Symbol !== 'undefined' && Symbol.species &&
      Buffer[Symbol.species] === Buffer) {
    // Fix subarray() in ES2016. See: https://github.com/feross/buffer/pull/97
    Object.defineProperty(Buffer, Symbol.species, {
      value: null,
      configurable: true
    })
  }
}

function assertSize (size) {
  if (typeof size !== 'number') {
    throw new TypeError('"size" argument must be a number')
  }
}

function alloc (that, size, fill, encoding) {
  assertSize(size)
  if (size <= 0) {
    return createBuffer(that, size)
  }
  if (fill !== undefined) {
    // Only pay attention to encoding if it's a string. This
    // prevents accidentally sending in a number that would
    // be interpretted as a start offset.
    return typeof encoding === 'string'
      ? createBuffer(that, size).fill(fill, encoding)
      : createBuffer(that, size).fill(fill)
  }
  return createBuffer(that, size)
}

/**
 * Creates a new filled Buffer instance.
 * alloc(size[, fill[, encoding]])
 **/
Buffer.alloc = function (size, fill, encoding) {
  return alloc(null, size, fill, encoding)
}

function allocUnsafe (that, size) {
  assertSize(size)
  that = createBuffer(that, size < 0 ? 0 : checked(size) | 0)
  if (!Buffer.TYPED_ARRAY_SUPPORT) {
    for (var i = 0; i < size; ++i) {
      that[i] = 0
    }
  }
  return that
}

/**
 * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.
 * */
Buffer.allocUnsafe = function (size) {
  return allocUnsafe(null, size)
}
/**
 * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.
 */
Buffer.allocUnsafeSlow = function (size) {
  return allocUnsafe(null, size)
}

function fromString (that, string, encoding) {
  if (typeof encoding !== 'string' || encoding === '') {
    encoding = 'utf8'
  }

  if (!Buffer.isEncoding(encoding)) {
    throw new TypeError('"encoding" must be a valid string encoding')
  }

  var length = byteLength(string, encoding) | 0
  that = createBuffer(that, length)

  that.write(string, encoding)
  return that
}

function fromArrayLike (that, array) {
  var length = checked(array.length) | 0
  that = createBuffer(that, length)
  for (var i = 0; i < length; i += 1) {
    that[i] = array[i] & 255
  }
  return that
}

function fromArrayBuffer (that, array, byteOffset, length) {
  array.byteLength // this throws if `array` is not a valid ArrayBuffer

  if (byteOffset < 0 || array.byteLength < byteOffset) {
    throw new RangeError('\'offset\' is out of bounds')
  }

  if (array.byteLength < byteOffset + (length || 0)) {
    throw new RangeError('\'length\' is out of bounds')
  }

  if (length === undefined) {
    array = new Uint8Array(array, byteOffset)
  } else {
    array = new Uint8Array(array, byteOffset, length)
  }

  if (Buffer.TYPED_ARRAY_SUPPORT) {
    // Return an augmented `Uint8Array` instance, for best performance
    that = array
    that.__proto__ = Buffer.prototype
  } else {
    // Fallback: Return an object instance of the Buffer class
    that = fromArrayLike(that, array)
  }
  return that
}

function fromObject (that, obj) {
  if (Buffer.isBuffer(obj)) {
    var len = checked(obj.length) | 0
    that = createBuffer(that, len)

    if (that.length === 0) {
      return that
    }

    obj.copy(that, 0, 0, len)
    return that
  }

  if (obj) {
    if ((typeof ArrayBuffer !== 'undefined' &&
        obj.buffer instanceof ArrayBuffer) || 'length' in obj) {
      if (typeof obj.length !== 'number' || isnan(obj.length)) {
        return createBuffer(that, 0)
      }
      return fromArrayLike(that, obj)
    }

    if (obj.type === 'Buffer' && isArray(obj.data)) {
      return fromArrayLike(that, obj.data)
    }
  }

  throw new TypeError('First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object.')
}

function checked (length) {
  // Note: cannot use `length < kMaxLength` here because that fails when
  // length is NaN (which is otherwise coerced to zero.)
  if (length >= kMaxLength()) {
    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +
                         'size: 0x' + kMaxLength().toString(16) + ' bytes')
  }
  return length | 0
}

function SlowBuffer (length) {
  if (+length != length) { // eslint-disable-line eqeqeq
    length = 0
  }
  return Buffer.alloc(+length)
}

Buffer.isBuffer = function isBuffer (b) {
  return !!(b != null && b._isBuffer)
}

Buffer.compare = function compare (a, b) {
  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {
    throw new TypeError('Arguments must be Buffers')
  }

  if (a === b) return 0

  var x = a.length
  var y = b.length

  for (var i = 0, len = Math.min(x, y); i < len; ++i) {
    if (a[i] !== b[i]) {
      x = a[i]
      y = b[i]
      break
    }
  }

  if (x < y) return -1
  if (y < x) return 1
  return 0
}

Buffer.isEncoding = function isEncoding (encoding) {
  switch (String(encoding).toLowerCase()) {
    case 'hex':
    case 'utf8':
    case 'utf-8':
    case 'ascii':
    case 'binary':
    case 'base64':
    case 'raw':
    case 'ucs2':
    case 'ucs-2':
    case 'utf16le':
    case 'utf-16le':
      return true
    default:
      return false
  }
}

Buffer.concat = function concat (list, length) {
  if (!isArray(list)) {
    throw new TypeError('"list" argument must be an Array of Buffers')
  }

  if (list.length === 0) {
    return Buffer.alloc(0)
  }

  var i
  if (length === undefined) {
    length = 0
    for (i = 0; i < list.length; ++i) {
      length += list[i].length
    }
  }

  var buffer = Buffer.allocUnsafe(length)
  var pos = 0
  for (i = 0; i < list.length; ++i) {
    var buf = list[i]
    if (!Buffer.isBuffer(buf)) {
      throw new TypeError('"list" argument must be an Array of Buffers')
    }
    buf.copy(buffer, pos)
    pos += buf.length
  }
  return buffer
}

function byteLength (string, encoding) {
  if (Buffer.isBuffer(string)) {
    return string.length
  }
  if (typeof ArrayBuffer !== 'undefined' && typeof ArrayBuffer.isView === 'function' &&
      (ArrayBuffer.isView(string) || string instanceof ArrayBuffer)) {
    return string.byteLength
  }
  if (typeof string !== 'string') {
    string = '' + string
  }

  var len = string.length
  if (len === 0) return 0

  // Use a for loop to avoid recursion
  var loweredCase = false
  for (;;) {
    switch (encoding) {
      case 'ascii':
      case 'binary':
      case 'raw':
      case 'raws':
        return len
      case 'utf8':
      case 'utf-8':
      case undefined:
        return utf8ToBytes(string).length
      case 'ucs2':
      case 'ucs-2':
      case 'utf16le':
      case 'utf-16le':
        return len * 2
      case 'hex':
        return len >>> 1
      case 'base64':
        return base64ToBytes(string).length
      default:
        if (loweredCase) return utf8ToBytes(string).length // assume utf8
        encoding = ('' + encoding).toLowerCase()
        loweredCase = true
    }
  }
}
Buffer.byteLength = byteLength

function slowToString (encoding, start, end) {
  var loweredCase = false

  // No need to verify that "this.length <= MAX_UINT32" since it's a read-only
  // property of a typed array.

  // This behaves neither like String nor Uint8Array in that we set start/end
  // to their upper/lower bounds if the value passed is out of range.
  // undefined is handled specially as per ECMA-262 6th Edition,
  // Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.
  if (start === undefined || start < 0) {
    start = 0
  }
  // Return early if start > this.length. Done here to prevent potential uint32
  // coercion fail below.
  if (start > this.length) {
    return ''
  }

  if (end === undefined || end > this.length) {
    end = this.length
  }

  if (end <= 0) {
    return ''
  }

  // Force coersion to uint32. This will also coerce falsey/NaN values to 0.
  end >>>= 0
  start >>>= 0

  if (end <= start) {
    return ''
  }

  if (!encoding) encoding = 'utf8'

  while (true) {
    switch (encoding) {
      case 'hex':
        return hexSlice(this, start, end)

      case 'utf8':
      case 'utf-8':
        return utf8Slice(this, start, end)

      case 'ascii':
        return asciiSlice(this, start, end)

      case 'binary':
        return binarySlice(this, start, end)

      case 'base64':
        return base64Slice(this, start, end)

      case 'ucs2':
      case 'ucs-2':
      case 'utf16le':
      case 'utf-16le':
        return utf16leSlice(this, start, end)

      default:
        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
        encoding = (encoding + '').toLowerCase()
        loweredCase = true
    }
  }
}

// The property is used by `Buffer.isBuffer` and `is-buffer` (in Safari 5-7) to detect
// Buffer instances.
Buffer.prototype._isBuffer = true

function swap (b, n, m) {
  var i = b[n]
  b[n] = b[m]
  b[m] = i
}

Buffer.prototype.swap16 = function swap16 () {
  var len = this.length
  if (len % 2 !== 0) {
    throw new RangeError('Buffer size must be a multiple of 16-bits')
  }
  for (var i = 0; i < len; i += 2) {
    swap(this, i, i + 1)
  }
  return this
}

Buffer.prototype.swap32 = function swap32 () {
  var len = this.length
  if (len % 4 !== 0) {
    throw new RangeError('Buffer size must be a multiple of 32-bits')
  }
  for (var i = 0; i < len; i += 4) {
    swap(this, i, i + 3)
    swap(this, i + 1, i + 2)
  }
  return this
}

Buffer.prototype.toString = function toString () {
  var length = this.length | 0
  if (length === 0) return ''
  if (arguments.length === 0) return utf8Slice(this, 0, length)
  return slowToString.apply(this, arguments)
}

Buffer.prototype.equals = function equals (b) {
  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')
  if (this === b) return true
  return Buffer.compare(this, b) === 0
}

Buffer.prototype.inspect = function inspect () {
  var str = ''
  var max = exports.INSPECT_MAX_BYTES
  if (this.length > 0) {
    str = this.toString('hex', 0, max).match(/.{2}/g).join(' ')
    if (this.length > max) str += ' ... '
  }
  return '<Buffer ' + str + '>'
}

Buffer.prototype.compare = function compare (target, start, end, thisStart, thisEnd) {
  if (!Buffer.isBuffer(target)) {
    throw new TypeError('Argument must be a Buffer')
  }

  if (start === undefined) {
    start = 0
  }
  if (end === undefined) {
    end = target ? target.length : 0
  }
  if (thisStart === undefined) {
    thisStart = 0
  }
  if (thisEnd === undefined) {
    thisEnd = this.length
  }

  if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) {
    throw new RangeError('out of range index')
  }

  if (thisStart >= thisEnd && start >= end) {
    return 0
  }
  if (thisStart >= thisEnd) {
    return -1
  }
  if (start >= end) {
    return 1
  }

  start >>>= 0
  end >>>= 0
  thisStart >>>= 0
  thisEnd >>>= 0

  if (this === target) return 0

  var x = thisEnd - thisStart
  var y = end - start
  var len = Math.min(x, y)

  var thisCopy = this.slice(thisStart, thisEnd)
  var targetCopy = target.slice(start, end)

  for (var i = 0; i < len; ++i) {
    if (thisCopy[i] !== targetCopy[i]) {
      x = thisCopy[i]
      y = targetCopy[i]
      break
    }
  }

  if (x < y) return -1
  if (y < x) return 1
  return 0
}

function arrayIndexOf (arr, val, byteOffset, encoding) {
  var indexSize = 1
  var arrLength = arr.length
  var valLength = val.length

  if (encoding !== undefined) {
    encoding = String(encoding).toLowerCase()
    if (encoding === 'ucs2' || encoding === 'ucs-2' ||
        encoding === 'utf16le' || encoding === 'utf-16le') {
      if (arr.length < 2 || val.length < 2) {
        return -1
      }
      indexSize = 2
      arrLength /= 2
      valLength /= 2
      byteOffset /= 2
    }
  }

  function read (buf, i) {
    if (indexSize === 1) {
      return buf[i]
    } else {
      return buf.readUInt16BE(i * indexSize)
    }
  }

  var foundIndex = -1
  for (var i = byteOffset; i < arrLength; ++i) {
    if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) {
      if (foundIndex === -1) foundIndex = i
      if (i - foundIndex + 1 === valLength) return foundIndex * indexSize
    } else {
      if (foundIndex !== -1) i -= i - foundIndex
      foundIndex = -1
    }
  }

  return -1
}

Buffer.prototype.indexOf = function indexOf (val, byteOffset, encoding) {
  if (typeof byteOffset === 'string') {
    encoding = byteOffset
    byteOffset = 0
  } else if (byteOffset > 0x7fffffff) {
    byteOffset = 0x7fffffff
  } else if (byteOffset < -0x80000000) {
    byteOffset = -0x80000000
  }
  byteOffset >>= 0

  if (this.length === 0) return -1
  if (byteOffset >= this.length) return -1

  // Negative offsets start from the end of the buffer
  if (byteOffset < 0) byteOffset = Math.max(this.length + byteOffset, 0)

  if (typeof val === 'string') {
    val = Buffer.from(val, encoding)
  }

  if (Buffer.isBuffer(val)) {
    // special case: looking for empty string/buffer always fails
    if (val.length === 0) {
      return -1
    }
    return arrayIndexOf(this, val, byteOffset, encoding)
  }
  if (typeof val === 'number') {
    if (Buffer.TYPED_ARRAY_SUPPORT && Uint8Array.prototype.indexOf === 'function') {
      return Uint8Array.prototype.indexOf.call(this, val, byteOffset)
    }
    return arrayIndexOf(this, [ val ], byteOffset, encoding)
  }

  throw new TypeError('val must be string, number or Buffer')
}

Buffer.prototype.includes = function includes (val, byteOffset, encoding) {
  return this.indexOf(val, byteOffset, encoding) !== -1
}

function hexWrite (buf, string, offset, length) {
  offset = Number(offset) || 0
  var remaining = buf.length - offset
  if (!length) {
    length = remaining
  } else {
    length = Number(length)
    if (length > remaining) {
      length = remaining
    }
  }

  // must be an even number of digits
  var strLen = string.length
  if (strLen % 2 !== 0) throw new Error('Invalid hex string')

  if (length > strLen / 2) {
    length = strLen / 2
  }
  for (var i = 0; i < length; ++i) {
    var parsed = parseInt(string.substr(i * 2, 2), 16)
    if (isNaN(parsed)) return i
    buf[offset + i] = parsed
  }
  return i
}

function utf8Write (buf, string, offset, length) {
  return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)
}

function asciiWrite (buf, string, offset, length) {
  return blitBuffer(asciiToBytes(string), buf, offset, length)
}

function binaryWrite (buf, string, offset, length) {
  return asciiWrite(buf, string, offset, length)
}

function base64Write (buf, string, offset, length) {
  return blitBuffer(base64ToBytes(string), buf, offset, length)
}

function ucs2Write (buf, string, offset, length) {
  return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)
}

Buffer.prototype.write = function write (string, offset, length, encoding) {
  // Buffer#write(string)
  if (offset === undefined) {
    encoding = 'utf8'
    length = this.length
    offset = 0
  // Buffer#write(string, encoding)
  } else if (length === undefined && typeof offset === 'string') {
    encoding = offset
    length = this.length
    offset = 0
  // Buffer#write(string, offset[, length][, encoding])
  } else if (isFinite(offset)) {
    offset = offset | 0
    if (isFinite(length)) {
      length = length | 0
      if (encoding === undefined) encoding = 'utf8'
    } else {
      encoding = length
      length = undefined
    }
  // legacy write(string, encoding, offset, length) - remove in v0.13
  } else {
    throw new Error(
      'Buffer.write(string, encoding, offset[, length]) is no longer supported'
    )
  }

  var remaining = this.length - offset
  if (length === undefined || length > remaining) length = remaining

  if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {
    throw new RangeError('Attempt to write outside buffer bounds')
  }

  if (!encoding) encoding = 'utf8'

  var loweredCase = false
  for (;;) {
    switch (encoding) {
      case 'hex':
        return hexWrite(this, string, offset, length)

      case 'utf8':
      case 'utf-8':
        return utf8Write(this, string, offset, length)

      case 'ascii':
        return asciiWrite(this, string, offset, length)

      case 'binary':
        return binaryWrite(this, string, offset, length)

      case 'base64':
        // Warning: maxLength not taken into account in base64Write
        return base64Write(this, string, offset, length)

      case 'ucs2':
      case 'ucs-2':
      case 'utf16le':
      case 'utf-16le':
        return ucs2Write(this, string, offset, length)

      default:
        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
        encoding = ('' + encoding).toLowerCase()
        loweredCase = true
    }
  }
}

Buffer.prototype.toJSON = function toJSON () {
  return {
    type: 'Buffer',
    data: Array.prototype.slice.call(this._arr || this, 0)
  }
}

function base64Slice (buf, start, end) {
  if (start === 0 && end === buf.length) {
    return base64.fromByteArray(buf)
  } else {
    return base64.fromByteArray(buf.slice(start, end))
  }
}

function utf8Slice (buf, start, end) {
  end = Math.min(buf.length, end)
  var res = []

  var i = start
  while (i < end) {
    var firstByte = buf[i]
    var codePoint = null
    var bytesPerSequence = (firstByte > 0xEF) ? 4
      : (firstByte > 0xDF) ? 3
      : (firstByte > 0xBF) ? 2
      : 1

    if (i + bytesPerSequence <= end) {
      var secondByte, thirdByte, fourthByte, tempCodePoint

      switch (bytesPerSequence) {
        case 1:
          if (firstByte < 0x80) {
            codePoint = firstByte
          }
          break
        case 2:
          secondByte = buf[i + 1]
          if ((secondByte & 0xC0) === 0x80) {
            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)
            if (tempCodePoint > 0x7F) {
              codePoint = tempCodePoint
            }
          }
          break
        case 3:
          secondByte = buf[i + 1]
          thirdByte = buf[i + 2]
          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {
            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)
            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {
              codePoint = tempCodePoint
            }
          }
          break
        case 4:
          secondByte = buf[i + 1]
          thirdByte = buf[i + 2]
          fourthByte = buf[i + 3]
          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {
            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)
            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {
              codePoint = tempCodePoint
            }
          }
      }
    }

    if (codePoint === null) {
      // we did not generate a valid codePoint so insert a
      // replacement char (U+FFFD) and advance only 1 byte
      codePoint = 0xFFFD
      bytesPerSequence = 1
    } else if (codePoint > 0xFFFF) {
      // encode to utf16 (surrogate pair dance)
      codePoint -= 0x10000
      res.push(codePoint >>> 10 & 0x3FF | 0xD800)
      codePoint = 0xDC00 | codePoint & 0x3FF
    }

    res.push(codePoint)
    i += bytesPerSequence
  }

  return decodeCodePointsArray(res)
}

// Based on http://stackoverflow.com/a/22747272/680742, the browser with
// the lowest limit is Chrome, with 0x10000 args.
// We go 1 magnitude less, for safety
var MAX_ARGUMENTS_LENGTH = 0x1000

function decodeCodePointsArray (codePoints) {
  var len = codePoints.length
  if (len <= MAX_ARGUMENTS_LENGTH) {
    return String.fromCharCode.apply(String, codePoints) // avoid extra slice()
  }

  // Decode in chunks to avoid "call stack size exceeded".
  var res = ''
  var i = 0
  while (i < len) {
    res += String.fromCharCode.apply(
      String,
      codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)
    )
  }
  return res
}

function asciiSlice (buf, start, end) {
  var ret = ''
  end = Math.min(buf.length, end)

  for (var i = start; i < end; ++i) {
    ret += String.fromCharCode(buf[i] & 0x7F)
  }
  return ret
}

function binarySlice (buf, start, end) {
  var ret = ''
  end = Math.min(buf.length, end)

  for (var i = start; i < end; ++i) {
    ret += String.fromCharCode(buf[i])
  }
  return ret
}

function hexSlice (buf, start, end) {
  var len = buf.length

  if (!start || start < 0) start = 0
  if (!end || end < 0 || end > len) end = len

  var out = ''
  for (var i = start; i < end; ++i) {
    out += toHex(buf[i])
  }
  return out
}

function utf16leSlice (buf, start, end) {
  var bytes = buf.slice(start, end)
  var res = ''
  for (var i = 0; i < bytes.length; i += 2) {
    res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256)
  }
  return res
}

Buffer.prototype.slice = function slice (start, end) {
  var len = this.length
  start = ~~start
  end = end === undefined ? len : ~~end

  if (start < 0) {
    start += len
    if (start < 0) start = 0
  } else if (start > len) {
    start = len
  }

  if (end < 0) {
    end += len
    if (end < 0) end = 0
  } else if (end > len) {
    end = len
  }

  if (end < start) end = start

  var newBuf
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    newBuf = this.subarray(start, end)
    newBuf.__proto__ = Buffer.prototype
  } else {
    var sliceLen = end - start
    newBuf = new Buffer(sliceLen, undefined)
    for (var i = 0; i < sliceLen; ++i) {
      newBuf[i] = this[i + start]
    }
  }

  return newBuf
}

/*
 * Need to make sure that buffer isn't trying to write out of bounds.
 */
function checkOffset (offset, ext, length) {
  if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')
  if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')
}

Buffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {
  offset = offset | 0
  byteLength = byteLength | 0
  if (!noAssert) checkOffset(offset, byteLength, this.length)

  var val = this[offset]
  var mul = 1
  var i = 0
  while (++i < byteLength && (mul *= 0x100)) {
    val += this[offset + i] * mul
  }

  return val
}

Buffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {
  offset = offset | 0
  byteLength = byteLength | 0
  if (!noAssert) {
    checkOffset(offset, byteLength, this.length)
  }

  var val = this[offset + --byteLength]
  var mul = 1
  while (byteLength > 0 && (mul *= 0x100)) {
    val += this[offset + --byteLength] * mul
  }

  return val
}

Buffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 1, this.length)
  return this[offset]
}

Buffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 2, this.length)
  return this[offset] | (this[offset + 1] << 8)
}

Buffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 2, this.length)
  return (this[offset] << 8) | this[offset + 1]
}

Buffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 4, this.length)

  return ((this[offset]) |
      (this[offset + 1] << 8) |
      (this[offset + 2] << 16)) +
      (this[offset + 3] * 0x1000000)
}

Buffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 4, this.length)

  return (this[offset] * 0x1000000) +
    ((this[offset + 1] << 16) |
    (this[offset + 2] << 8) |
    this[offset + 3])
}

Buffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {
  offset = offset | 0
  byteLength = byteLength | 0
  if (!noAssert) checkOffset(offset, byteLength, this.length)

  var val = this[offset]
  var mul = 1
  var i = 0
  while (++i < byteLength && (mul *= 0x100)) {
    val += this[offset + i] * mul
  }
  mul *= 0x80

  if (val >= mul) val -= Math.pow(2, 8 * byteLength)

  return val
}

Buffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {
  offset = offset | 0
  byteLength = byteLength | 0
  if (!noAssert) checkOffset(offset, byteLength, this.length)

  var i = byteLength
  var mul = 1
  var val = this[offset + --i]
  while (i > 0 && (mul *= 0x100)) {
    val += this[offset + --i] * mul
  }
  mul *= 0x80

  if (val >= mul) val -= Math.pow(2, 8 * byteLength)

  return val
}

Buffer.prototype.readInt8 = function readInt8 (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 1, this.length)
  if (!(this[offset] & 0x80)) return (this[offset])
  return ((0xff - this[offset] + 1) * -1)
}

Buffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 2, this.length)
  var val = this[offset] | (this[offset + 1] << 8)
  return (val & 0x8000) ? val | 0xFFFF0000 : val
}

Buffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 2, this.length)
  var val = this[offset + 1] | (this[offset] << 8)
  return (val & 0x8000) ? val | 0xFFFF0000 : val
}

Buffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 4, this.length)

  return (this[offset]) |
    (this[offset + 1] << 8) |
    (this[offset + 2] << 16) |
    (this[offset + 3] << 24)
}

Buffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 4, this.length)

  return (this[offset] << 24) |
    (this[offset + 1] << 16) |
    (this[offset + 2] << 8) |
    (this[offset + 3])
}

Buffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 4, this.length)
  return ieee754.read(this, offset, true, 23, 4)
}

Buffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 4, this.length)
  return ieee754.read(this, offset, false, 23, 4)
}

Buffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 8, this.length)
  return ieee754.read(this, offset, true, 52, 8)
}

Buffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 8, this.length)
  return ieee754.read(this, offset, false, 52, 8)
}

function checkInt (buf, value, offset, ext, max, min) {
  if (!Buffer.isBuffer(buf)) throw new TypeError('"buffer" argument must be a Buffer instance')
  if (value > max || value < min) throw new RangeError('"value" argument is out of bounds')
  if (offset + ext > buf.length) throw new RangeError('Index out of range')
}

Buffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {
  value = +value
  offset = offset | 0
  byteLength = byteLength | 0
  if (!noAssert) {
    var maxBytes = Math.pow(2, 8 * byteLength) - 1
    checkInt(this, value, offset, byteLength, maxBytes, 0)
  }

  var mul = 1
  var i = 0
  this[offset] = value & 0xFF
  while (++i < byteLength && (mul *= 0x100)) {
    this[offset + i] = (value / mul) & 0xFF
  }

  return offset + byteLength
}

Buffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {
  value = +value
  offset = offset | 0
  byteLength = byteLength | 0
  if (!noAssert) {
    var maxBytes = Math.pow(2, 8 * byteLength) - 1
    checkInt(this, value, offset, byteLength, maxBytes, 0)
  }

  var i = byteLength - 1
  var mul = 1
  this[offset + i] = value & 0xFF
  while (--i >= 0 && (mul *= 0x100)) {
    this[offset + i] = (value / mul) & 0xFF
  }

  return offset + byteLength
}

Buffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)
  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)
  this[offset] = (value & 0xff)
  return offset + 1
}

function objectWriteUInt16 (buf, value, offset, littleEndian) {
  if (value < 0) value = 0xffff + value + 1
  for (var i = 0, j = Math.min(buf.length - offset, 2); i < j; ++i) {
    buf[offset + i] = (value & (0xff << (8 * (littleEndian ? i : 1 - i)))) >>>
      (littleEndian ? i : 1 - i) * 8
  }
}

Buffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    this[offset] = (value & 0xff)
    this[offset + 1] = (value >>> 8)
  } else {
    objectWriteUInt16(this, value, offset, true)
  }
  return offset + 2
}

Buffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    this[offset] = (value >>> 8)
    this[offset + 1] = (value & 0xff)
  } else {
    objectWriteUInt16(this, value, offset, false)
  }
  return offset + 2
}

function objectWriteUInt32 (buf, value, offset, littleEndian) {
  if (value < 0) value = 0xffffffff + value + 1
  for (var i = 0, j = Math.min(buf.length - offset, 4); i < j; ++i) {
    buf[offset + i] = (value >>> (littleEndian ? i : 3 - i) * 8) & 0xff
  }
}

Buffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    this[offset + 3] = (value >>> 24)
    this[offset + 2] = (value >>> 16)
    this[offset + 1] = (value >>> 8)
    this[offset] = (value & 0xff)
  } else {
    objectWriteUInt32(this, value, offset, true)
  }
  return offset + 4
}

Buffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    this[offset] = (value >>> 24)
    this[offset + 1] = (value >>> 16)
    this[offset + 2] = (value >>> 8)
    this[offset + 3] = (value & 0xff)
  } else {
    objectWriteUInt32(this, value, offset, false)
  }
  return offset + 4
}

Buffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) {
    var limit = Math.pow(2, 8 * byteLength - 1)

    checkInt(this, value, offset, byteLength, limit - 1, -limit)
  }

  var i = 0
  var mul = 1
  var sub = 0
  this[offset] = value & 0xFF
  while (++i < byteLength && (mul *= 0x100)) {
    if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) {
      sub = 1
    }
    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
  }

  return offset + byteLength
}

Buffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) {
    var limit = Math.pow(2, 8 * byteLength - 1)

    checkInt(this, value, offset, byteLength, limit - 1, -limit)
  }

  var i = byteLength - 1
  var mul = 1
  var sub = 0
  this[offset + i] = value & 0xFF
  while (--i >= 0 && (mul *= 0x100)) {
    if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) {
      sub = 1
    }
    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
  }

  return offset + byteLength
}

Buffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)
  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)
  if (value < 0) value = 0xff + value + 1
  this[offset] = (value & 0xff)
  return offset + 1
}

Buffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    this[offset] = (value & 0xff)
    this[offset + 1] = (value >>> 8)
  } else {
    objectWriteUInt16(this, value, offset, true)
  }
  return offset + 2
}

Buffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    this[offset] = (value >>> 8)
    this[offset + 1] = (value & 0xff)
  } else {
    objectWriteUInt16(this, value, offset, false)
  }
  return offset + 2
}

Buffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    this[offset] = (value & 0xff)
    this[offset + 1] = (value >>> 8)
    this[offset + 2] = (value >>> 16)
    this[offset + 3] = (value >>> 24)
  } else {
    objectWriteUInt32(this, value, offset, true)
  }
  return offset + 4
}

Buffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
  if (value < 0) value = 0xffffffff + value + 1
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    this[offset] = (value >>> 24)
    this[offset + 1] = (value >>> 16)
    this[offset + 2] = (value >>> 8)
    this[offset + 3] = (value & 0xff)
  } else {
    objectWriteUInt32(this, value, offset, false)
  }
  return offset + 4
}

function checkIEEE754 (buf, value, offset, ext, max, min) {
  if (offset + ext > buf.length) throw new RangeError('Index out of range')
  if (offset < 0) throw new RangeError('Index out of range')
}

function writeFloat (buf, value, offset, littleEndian, noAssert) {
  if (!noAssert) {
    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)
  }
  ieee754.write(buf, value, offset, littleEndian, 23, 4)
  return offset + 4
}

Buffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {
  return writeFloat(this, value, offset, true, noAssert)
}

Buffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {
  return writeFloat(this, value, offset, false, noAssert)
}

function writeDouble (buf, value, offset, littleEndian, noAssert) {
  if (!noAssert) {
    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)
  }
  ieee754.write(buf, value, offset, littleEndian, 52, 8)
  return offset + 8
}

Buffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {
  return writeDouble(this, value, offset, true, noAssert)
}

Buffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {
  return writeDouble(this, value, offset, false, noAssert)
}

// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)
Buffer.prototype.copy = function copy (target, targetStart, start, end) {
  if (!start) start = 0
  if (!end && end !== 0) end = this.length
  if (targetStart >= target.length) targetStart = target.length
  if (!targetStart) targetStart = 0
  if (end > 0 && end < start) end = start

  // Copy 0 bytes; we're done
  if (end === start) return 0
  if (target.length === 0 || this.length === 0) return 0

  // Fatal error conditions
  if (targetStart < 0) {
    throw new RangeError('targetStart out of bounds')
  }
  if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds')
  if (end < 0) throw new RangeError('sourceEnd out of bounds')

  // Are we oob?
  if (end > this.length) end = this.length
  if (target.length - targetStart < end - start) {
    end = target.length - targetStart + start
  }

  var len = end - start
  var i

  if (this === target && start < targetStart && targetStart < end) {
    // descending copy from end
    for (i = len - 1; i >= 0; --i) {
      target[i + targetStart] = this[i + start]
    }
  } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {
    // ascending copy from start
    for (i = 0; i < len; ++i) {
      target[i + targetStart] = this[i + start]
    }
  } else {
    Uint8Array.prototype.set.call(
      target,
      this.subarray(start, start + len),
      targetStart
    )
  }

  return len
}

// Usage:
//    buffer.fill(number[, offset[, end]])
//    buffer.fill(buffer[, offset[, end]])
//    buffer.fill(string[, offset[, end]][, encoding])
Buffer.prototype.fill = function fill (val, start, end, encoding) {
  // Handle string cases:
  if (typeof val === 'string') {
    if (typeof start === 'string') {
      encoding = start
      start = 0
      end = this.length
    } else if (typeof end === 'string') {
      encoding = end
      end = this.length
    }
    if (val.length === 1) {
      var code = val.charCodeAt(0)
      if (code < 256) {
        val = code
      }
    }
    if (encoding !== undefined && typeof encoding !== 'string') {
      throw new TypeError('encoding must be a string')
    }
    if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {
      throw new TypeError('Unknown encoding: ' + encoding)
    }
  } else if (typeof val === 'number') {
    val = val & 255
  }

  // Invalid ranges are not set to a default, so can range check early.
  if (start < 0 || this.length < start || this.length < end) {
    throw new RangeError('Out of range index')
  }

  if (end <= start) {
    return this
  }

  start = start >>> 0
  end = end === undefined ? this.length : end >>> 0

  if (!val) val = 0

  var i
  if (typeof val === 'number') {
    for (i = start; i < end; ++i) {
      this[i] = val
    }
  } else {
    var bytes = Buffer.isBuffer(val)
      ? val
      : utf8ToBytes(new Buffer(val, encoding).toString())
    var len = bytes.length
    for (i = 0; i < end - start; ++i) {
      this[i + start] = bytes[i % len]
    }
  }

  return this
}

// HELPER FUNCTIONS
// ================

var INVALID_BASE64_RE = /[^+\/0-9A-Za-z-_]/g

function base64clean (str) {
  // Node strips out invalid characters like \n and \t from the string, base64-js does not
  str = stringtrim(str).replace(INVALID_BASE64_RE, '')
  // Node converts strings with length < 2 to ''
  if (str.length < 2) return ''
  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not
  while (str.length % 4 !== 0) {
    str = str + '='
  }
  return str
}

function stringtrim (str) {
  if (str.trim) return str.trim()
  return str.replace(/^\s+|\s+$/g, '')
}

function toHex (n) {
  if (n < 16) return '0' + n.toString(16)
  return n.toString(16)
}

function utf8ToBytes (string, units) {
  units = units || Infinity
  var codePoint
  var length = string.length
  var leadSurrogate = null
  var bytes = []

  for (var i = 0; i < length; ++i) {
    codePoint = string.charCodeAt(i)

    // is surrogate component
    if (codePoint > 0xD7FF && codePoint < 0xE000) {
      // last char was a lead
      if (!leadSurrogate) {
        // no lead yet
        if (codePoint > 0xDBFF) {
          // unexpected trail
          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
          continue
        } else if (i + 1 === length) {
          // unpaired lead
          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
          continue
        }

        // valid lead
        leadSurrogate = codePoint

        continue
      }

      // 2 leads in a row
      if (codePoint < 0xDC00) {
        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
        leadSurrogate = codePoint
        continue
      }

      // valid surrogate pair
      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000
    } else if (leadSurrogate) {
      // valid bmp char, but last char was a lead
      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
    }

    leadSurrogate = null

    // encode utf8
    if (codePoint < 0x80) {
      if ((units -= 1) < 0) break
      bytes.push(codePoint)
    } else if (codePoint < 0x800) {
      if ((units -= 2) < 0) break
      bytes.push(
        codePoint >> 0x6 | 0xC0,
        codePoint & 0x3F | 0x80
      )
    } else if (codePoint < 0x10000) {
      if ((units -= 3) < 0) break
      bytes.push(
        codePoint >> 0xC | 0xE0,
        codePoint >> 0x6 & 0x3F | 0x80,
        codePoint & 0x3F | 0x80
      )
    } else if (codePoint < 0x110000) {
      if ((units -= 4) < 0) break
      bytes.push(
        codePoint >> 0x12 | 0xF0,
        codePoint >> 0xC & 0x3F | 0x80,
        codePoint >> 0x6 & 0x3F | 0x80,
        codePoint & 0x3F | 0x80
      )
    } else {
      throw new Error('Invalid code point')
    }
  }

  return bytes
}

function asciiToBytes (str) {
  var byteArray = []
  for (var i = 0; i < str.length; ++i) {
    // Node's code seems to be doing this and not & 0x7F..
    byteArray.push(str.charCodeAt(i) & 0xFF)
  }
  return byteArray
}

function utf16leToBytes (str, units) {
  var c, hi, lo
  var byteArray = []
  for (var i = 0; i < str.length; ++i) {
    if ((units -= 2) < 0) break

    c = str.charCodeAt(i)
    hi = c >> 8
    lo = c % 256
    byteArray.push(lo)
    byteArray.push(hi)
  }

  return byteArray
}

function base64ToBytes (str) {
  return base64.toByteArray(base64clean(str))
}

function blitBuffer (src, dst, offset, length) {
  for (var i = 0; i < length; ++i) {
    if ((i + offset >= dst.length) || (i >= src.length)) break
    dst[i + offset] = src[i]
  }
  return i
}

function isnan (val) {
  return val !== val // eslint-disable-line no-self-compare
}

}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"base64-js":21,"ieee754":30,"isarray":33}],25:[function(require,module,exports){
/*
 Copyright 2013-2014 Daniel Wirtz <dcode@dcode.io>

 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at

 http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 */

/**
 * @license bytebuffer.js (c) 2015 Daniel Wirtz <dcode@dcode.io>
 * Backing buffer: ArrayBuffer, Accessor: Uint8Array
 * Released under the Apache License, Version 2.0
 * see: https://github.com/dcodeIO/bytebuffer.js for details
 */
(function(global, factory) {

    /* AMD */ if (typeof define === 'function' && define["amd"])
        define(["long"], factory);
    /* CommonJS */ else if (typeof require === 'function' && typeof module === "object" && module && module["exports"])
        module['exports'] = (function() {
            var Long; try { Long = require("long"); } catch (e) {}
            return factory(Long);
        })();
    /* Global */ else
        (global["dcodeIO"] = global["dcodeIO"] || {})["ByteBuffer"] = factory(global["dcodeIO"]["Long"]);

})(this, function(Long) {
    "use strict";

    /**
     * Constructs a new ByteBuffer.
     * @class The swiss army knife for binary data in JavaScript.
     * @exports ByteBuffer
     * @constructor
     * @param {number=} capacity Initial capacity. Defaults to {@link ByteBuffer.DEFAULT_CAPACITY}.
     * @param {boolean=} littleEndian Whether to use little or big endian byte order. Defaults to
     *  {@link ByteBuffer.DEFAULT_ENDIAN}.
     * @param {boolean=} noAssert Whether to skip assertions of offsets and values. Defaults to
     *  {@link ByteBuffer.DEFAULT_NOASSERT}.
     * @expose
     */
    var ByteBuffer = function(capacity, littleEndian, noAssert) {
        if (typeof capacity === 'undefined')
            capacity = ByteBuffer.DEFAULT_CAPACITY;
        if (typeof littleEndian === 'undefined')
            littleEndian = ByteBuffer.DEFAULT_ENDIAN;
        if (typeof noAssert === 'undefined')
            noAssert = ByteBuffer.DEFAULT_NOASSERT;
        if (!noAssert) {
            capacity = capacity | 0;
            if (capacity < 0)
                throw RangeError("Illegal capacity");
            littleEndian = !!littleEndian;
            noAssert = !!noAssert;
        }

        /**
         * Backing ArrayBuffer.
         * @type {!ArrayBuffer}
         * @expose
         */
        this.buffer = capacity === 0 ? EMPTY_BUFFER : new ArrayBuffer(capacity);

        /**
         * Uint8Array utilized to manipulate the backing buffer. Becomes `null` if the backing buffer has a capacity of `0`.
         * @type {?Uint8Array}
         * @expose
         */
        this.view = capacity === 0 ? null : new Uint8Array(this.buffer);

        /**
         * Absolute read/write offset.
         * @type {number}
         * @expose
         * @see ByteBuffer#flip
         * @see ByteBuffer#clear
         */
        this.offset = 0;

        /**
         * Marked offset.
         * @type {number}
         * @expose
         * @see ByteBuffer#mark
         * @see ByteBuffer#reset
         */
        this.markedOffset = -1;

        /**
         * Absolute limit of the contained data. Set to the backing buffer's capacity upon allocation.
         * @type {number}
         * @expose
         * @see ByteBuffer#flip
         * @see ByteBuffer#clear
         */
        this.limit = capacity;

        /**
         * Whether to use little endian byte order, defaults to `false` for big endian.
         * @type {boolean}
         * @expose
         */
        this.littleEndian = littleEndian;

        /**
         * Whether to skip assertions of offsets and values, defaults to `false`.
         * @type {boolean}
         * @expose
         */
        this.noAssert = noAssert;
    };

    /**
     * ByteBuffer version.
     * @type {string}
     * @const
     * @expose
     */
    ByteBuffer.VERSION = "5.0.1";

    /**
     * Little endian constant that can be used instead of its boolean value. Evaluates to `true`.
     * @type {boolean}
     * @const
     * @expose
     */
    ByteBuffer.LITTLE_ENDIAN = true;

    /**
     * Big endian constant that can be used instead of its boolean value. Evaluates to `false`.
     * @type {boolean}
     * @const
     * @expose
     */
    ByteBuffer.BIG_ENDIAN = false;

    /**
     * Default initial capacity of `16`.
     * @type {number}
     * @expose
     */
    ByteBuffer.DEFAULT_CAPACITY = 16;

    /**
     * Default endianess of `false` for big endian.
     * @type {boolean}
     * @expose
     */
    ByteBuffer.DEFAULT_ENDIAN = ByteBuffer.BIG_ENDIAN;

    /**
     * Default no assertions flag of `false`.
     * @type {boolean}
     * @expose
     */
    ByteBuffer.DEFAULT_NOASSERT = false;

    /**
     * A `Long` class for representing a 64-bit two's-complement integer value. May be `null` if Long.js has not been loaded
     *  and int64 support is not available.
     * @type {?Long}
     * @const
     * @see https://github.com/dcodeIO/long.js
     * @expose
     */
    ByteBuffer.Long = Long || null;

    /**
     * @alias ByteBuffer.prototype
     * @inner
     */
    var ByteBufferPrototype = ByteBuffer.prototype;

    /**
     * An indicator used to reliably determine if an object is a ByteBuffer or not.
     * @type {boolean}
     * @const
     * @expose
     * @private
     */
    ByteBufferPrototype.__isByteBuffer__;

    Object.defineProperty(ByteBufferPrototype, "__isByteBuffer__", {
        value: true,
        enumerable: false,
        configurable: false
    });

    // helpers

    /**
     * @type {!ArrayBuffer}
     * @inner
     */
    var EMPTY_BUFFER = new ArrayBuffer(0);

    /**
     * String.fromCharCode reference for compile-time renaming.
     * @type {function(...number):string}
     * @inner
     */
    var stringFromCharCode = String.fromCharCode;

    /**
     * Creates a source function for a string.
     * @param {string} s String to read from
     * @returns {function():number|null} Source function returning the next char code respectively `null` if there are
     *  no more characters left.
     * @throws {TypeError} If the argument is invalid
     * @inner
     */
    function stringSource(s) {
        var i=0; return function() {
            return i < s.length ? s.charCodeAt(i++) : null;
        };
    }

    /**
     * Creates a destination function for a string.
     * @returns {function(number=):undefined|string} Destination function successively called with the next char code.
     *  Returns the final string when called without arguments.
     * @inner
     */
    function stringDestination() {
        var cs = [], ps = []; return function() {
            if (arguments.length === 0)
                return ps.join('')+stringFromCharCode.apply(String, cs);
            if (cs.length + arguments.length > 1024)
                ps.push(stringFromCharCode.apply(String, cs)),
                    cs.length = 0;
            Array.prototype.push.apply(cs, arguments);
        };
    }

    /**
     * Gets the accessor type.
     * @returns {Function} `Buffer` under node.js, `Uint8Array` respectively `DataView` in the browser (classes)
     * @expose
     */
    ByteBuffer.accessor = function() {
        return Uint8Array;
    };
    /**
     * Allocates a new ByteBuffer backed by a buffer of the specified capacity.
     * @param {number=} capacity Initial capacity. Defaults to {@link ByteBuffer.DEFAULT_CAPACITY}.
     * @param {boolean=} littleEndian Whether to use little or big endian byte order. Defaults to
     *  {@link ByteBuffer.DEFAULT_ENDIAN}.
     * @param {boolean=} noAssert Whether to skip assertions of offsets and values. Defaults to
     *  {@link ByteBuffer.DEFAULT_NOASSERT}.
     * @returns {!ByteBuffer}
     * @expose
     */
    ByteBuffer.allocate = function(capacity, littleEndian, noAssert) {
        return new ByteBuffer(capacity, littleEndian, noAssert);
    };

    /**
     * Concatenates multiple ByteBuffers into one.
     * @param {!Array.<!ByteBuffer|!ArrayBuffer|!Uint8Array|string>} buffers Buffers to concatenate
     * @param {(string|boolean)=} encoding String encoding if `buffers` contains a string ("base64", "hex", "binary",
     *  defaults to "utf8")
     * @param {boolean=} littleEndian Whether to use little or big endian byte order for the resulting ByteBuffer. Defaults
     *  to {@link ByteBuffer.DEFAULT_ENDIAN}.
     * @param {boolean=} noAssert Whether to skip assertions of offsets and values for the resulting ByteBuffer. Defaults to
     *  {@link ByteBuffer.DEFAULT_NOASSERT}.
     * @returns {!ByteBuffer} Concatenated ByteBuffer
     * @expose
     */
    ByteBuffer.concat = function(buffers, encoding, littleEndian, noAssert) {
        if (typeof encoding === 'boolean' || typeof encoding !== 'string') {
            noAssert = littleEndian;
            littleEndian = encoding;
            encoding = undefined;
        }
        var capacity = 0;
        for (var i=0, k=buffers.length, length; i<k; ++i) {
            if (!ByteBuffer.isByteBuffer(buffers[i]))
                buffers[i] = ByteBuffer.wrap(buffers[i], encoding);
            length = buffers[i].limit - buffers[i].offset;
            if (length > 0) capacity += length;
        }
        if (capacity === 0)
            return new ByteBuffer(0, littleEndian, noAssert);
        var bb = new ByteBuffer(capacity, littleEndian, noAssert),
            bi;
        i=0; while (i<k) {
            bi = buffers[i++];
            length = bi.limit - bi.offset;
            if (length <= 0) continue;
            bb.view.set(bi.view.subarray(bi.offset, bi.limit), bb.offset);
            bb.offset += length;
        }
        bb.limit = bb.offset;
        bb.offset = 0;
        return bb;
    };

    /**
     * Tests if the specified type is a ByteBuffer.
     * @param {*} bb ByteBuffer to test
     * @returns {boolean} `true` if it is a ByteBuffer, otherwise `false`
     * @expose
     */
    ByteBuffer.isByteBuffer = function(bb) {
        return (bb && bb["__isByteBuffer__"]) === true;
    };
    /**
     * Gets the backing buffer type.
     * @returns {Function} `Buffer` under node.js, `ArrayBuffer` in the browser (classes)
     * @expose
     */
    ByteBuffer.type = function() {
        return ArrayBuffer;
    };
    /**
     * Wraps a buffer or a string. Sets the allocated ByteBuffer's {@link ByteBuffer#offset} to `0` and its
     *  {@link ByteBuffer#limit} to the length of the wrapped data.
     * @param {!ByteBuffer|!ArrayBuffer|!Uint8Array|string|!Array.<number>} buffer Anything that can be wrapped
     * @param {(string|boolean)=} encoding String encoding if `buffer` is a string ("base64", "hex", "binary", defaults to
     *  "utf8")
     * @param {boolean=} littleEndian Whether to use little or big endian byte order. Defaults to
     *  {@link ByteBuffer.DEFAULT_ENDIAN}.
     * @param {boolean=} noAssert Whether to skip assertions of offsets and values. Defaults to
     *  {@link ByteBuffer.DEFAULT_NOASSERT}.
     * @returns {!ByteBuffer} A ByteBuffer wrapping `buffer`
     * @expose
     */
    ByteBuffer.wrap = function(buffer, encoding, littleEndian, noAssert) {
        if (typeof encoding !== 'string') {
            noAssert = littleEndian;
            littleEndian = encoding;
            encoding = undefined;
        }
        if (typeof buffer === 'string') {
            if (typeof encoding === 'undefined')
                encoding = "utf8";
            switch (encoding) {
                case "base64":
                    return ByteBuffer.fromBase64(buffer, littleEndian);
                case "hex":
                    return ByteBuffer.fromHex(buffer, littleEndian);
                case "binary":
                    return ByteBuffer.fromBinary(buffer, littleEndian);
                case "utf8":
                    return ByteBuffer.fromUTF8(buffer, littleEndian);
                case "debug":
                    return ByteBuffer.fromDebug(buffer, littleEndian);
                default:
                    throw Error("Unsupported encoding: "+encoding);
            }
        }
        if (buffer === null || typeof buffer !== 'object')
            throw TypeError("Illegal buffer");
        var bb;
        if (ByteBuffer.isByteBuffer(buffer)) {
            bb = ByteBufferPrototype.clone.call(buffer);
            bb.markedOffset = -1;
            return bb;
        }
        if (buffer instanceof Uint8Array) { // Extract ArrayBuffer from Uint8Array
            bb = new ByteBuffer(0, littleEndian, noAssert);
            if (buffer.length > 0) { // Avoid references to more than one EMPTY_BUFFER
                bb.buffer = buffer.buffer;
                bb.offset = buffer.byteOffset;
                bb.limit = buffer.byteOffset + buffer.byteLength;
                bb.view = new Uint8Array(buffer.buffer);
            }
        } else if (buffer instanceof ArrayBuffer) { // Reuse ArrayBuffer
            bb = new ByteBuffer(0, littleEndian, noAssert);
            if (buffer.byteLength > 0) {
                bb.buffer = buffer;
                bb.offset = 0;
                bb.limit = buffer.byteLength;
                bb.view = buffer.byteLength > 0 ? new Uint8Array(buffer) : null;
            }
        } else if (Object.prototype.toString.call(buffer) === "[object Array]") { // Create from octets
            bb = new ByteBuffer(buffer.length, littleEndian, noAssert);
            bb.limit = buffer.length;
            for (var i=0; i<buffer.length; ++i)
                bb.view[i] = buffer[i];
        } else
            throw TypeError("Illegal buffer"); // Otherwise fail
        return bb;
    };

    /**
     * Writes the array as a bitset.
     * @param {Array<boolean>} value Array of booleans to write
     * @param {number=} offset Offset to read from. Will use and increase {@link ByteBuffer#offset} by `length` if omitted.
     * @returns {!ByteBuffer}
     * @expose
     */
    ByteBufferPrototype.writeBitSet = function(value, offset) {
      var relative = typeof offset === 'undefined';
      if (relative) offset = this.offset;
      if (!this.noAssert) {
        if (!(value instanceof Array))
          throw TypeError("Illegal BitSet: Not an array");
        if (typeof offset !== 'number' || offset % 1 !== 0)
            throw TypeError("Illegal offset: "+offset+" (not an integer)");
        offset >>>= 0;
        if (offset < 0 || offset + 0 > this.buffer.byteLength)
            throw RangeError("Illegal offset: 0 <= "+offset+" (+"+0+") <= "+this.buffer.byteLength);
      }

      var start = offset,
          bits = value.length,
          bytes = (bits >> 3),
          bit = 0,
          k;

      offset += this.writeVarint32(bits,offset);

      while(bytes--) {
        k = (!!value[bit++] & 1) |
            ((!!value[bit++] & 1) << 1) |
            ((!!value[bit++] & 1) << 2) |
            ((!!value[bit++] & 1) << 3) |
            ((!!value[bit++] & 1) << 4) |
            ((!!value[bit++] & 1) << 5) |
            ((!!value[bit++] & 1) << 6) |
            ((!!value[bit++] & 1) << 7);
        this.writeByte(k,offset++);
      }

      if(bit < bits) {
        var m = 0; k = 0;
        while(bit < bits) k = k | ((!!value[bit++] & 1) << (m++));
        this.writeByte(k,offset++);
      }

      if (relative) {
        this.offset = offset;
        return this;
      }
      return offset - start;
    }

    /**
     * Reads a BitSet as an array of booleans.
     * @param {number=} offset Offset to read from. Will use and increase {@link ByteBuffer#offset} by `length` if omitted.
     * @returns {Array<boolean>
     * @expose
     */
    ByteBufferPrototype.readBitSet = function(offset) {
      var relative = typeof offset === 'undefined';
      if (relative) offset = this.offset;

      var ret = this.readVarint32(offset),
          bits = ret.value,
          bytes = (bits >> 3),
          bit = 0,
          value = [],
          k;

      offset += ret.length;

      while(bytes--) {
        k = this.readByte(offset++);
        value[bit++] = !!(k & 0x01);
        value[bit++] = !!(k & 0x02);
        value[bit++] = !!(k & 0x04);
        value[bit++] = !!(k & 0x08);
        value[bit++] = !!(k & 0x10);
        value[bit++] = !!(k & 0x20);
        value[bit++] = !!(k & 0x40);
        value[bit++] = !!(k & 0x80);
      }

      if(bit < bits) {
        var m = 0;
        k = this.readByte(offset++);
        while(bit < bits) value[bit++] = !!((k >> (m++)) & 1);
      }

      if (relative) {
        this.offset = offset;
      }
      return value;
    }
    /**
     * Reads the specified number of bytes.
     * @param {number} length Number of bytes to read
     * @param {number=} offset Offset to read from. Will use and increase {@link ByteBuffer#offset} by `length` if omitted.
     * @returns {!ByteBuffer}
     * @expose
     */
    ByteBufferPrototype.readBytes = function(length, offset) {
        var relative = typeof offset === 'undefined';
        if (relative) offset = this.offset;
        if (!this.noAssert) {
            if (typeof offset !== 'number' || offset % 1 !== 0)
                throw TypeError("Illegal offset: "+offset+" (not an integer)");
            offset >>>= 0;
            if (offset < 0 || offset + length > this.buffer.byteLength)
                throw RangeError("Illegal offset: 0 <= "+offset+" (+"+length+") <= "+this.buffer.byteLength);
        }
        var slice = this.slice(offset, offset + length);
        if (relative) this.offset += length;
        return slice;
    };

    /**
     * Writes a payload of bytes. This is an alias of {@link ByteBuffer#append}.
     * @function
     * @param {!ByteBuffer|!ArrayBuffer|!Uint8Array|string} source Data to write. If `source` is a ByteBuffer, its offsets
     *  will be modified according to the performed read operation.
     * @param {(string|number)=} encoding Encoding if `data` is a string ("base64", "hex", "binary", defaults to "utf8")
     * @param {number=} offset Offset to write to. Will use and increase {@link ByteBuffer#offset} by the number of bytes
     *  written if omitted.
     * @returns {!ByteBuffer} this
     * @expose
     */
    ByteBufferPrototype.writeBytes = ByteBufferPrototype.append;

    // types/ints/int8

    /**
     * Writes an 8bit signed integer.
     * @param {number} value Value to write
     * @param {number=} offset Offset to write to. Will use and advance {@link ByteBuffer#offset} by `1` if omitted.
     * @returns {!ByteBuffer} this
     * @expose
     */
    ByteBufferPrototype.writeInt8 = function(value, offset) {
        var relative = typeof offset === 'undefined';
        if (relative) offset = this.offset;
        if (!this.noAssert) {
            if (typeof value !== 'number' || value % 1 !== 0)
                throw TypeError("Illegal value: "+value+" (not an integer)");
            value |= 0;
            if (typeof offset !== 'number' || offset % 1 !== 0)
                throw TypeError("Illegal offset: "+offset+" (not an integer)");
            offset >>>= 0;
            if (offset < 0 || offset + 0 > this.buffer.byteLength)
                throw RangeError("Illegal offset: 0 <= "+offset+" (+"+0+") <= "+this.buffer.byteLength);
        }
        offset += 1;
        var capacity0 = this.buffer.byteLength;
        if (offset > capacity0)
            this.resize((capacity0 *= 2) > offset ? capacity0 : offset);
        offset -= 1;
        this.view[offset] = value;
        if (relative) this.offset += 1;
        return this;
    };

    /**
     * Writes an 8bit signed integer. This is an alias of {@link ByteBuffer#writeInt8}.
     * @function
     * @param {number} value Value to write
     * @param {number=} offset Offset to write to. Will use and advance {@link ByteBuffer#offset} by `1` if omitted.
     * @returns {!ByteBuffer} this
     * @expose
     */
    ByteBufferPrototype.writeByte = ByteBufferPrototype.writeInt8;

    /**
     * Reads an 8bit signed integer.
     * @param {number=} offset Offset to read from. Will use and advance {@link ByteBuffer#offset} by `1` if omitted.
     * @returns {number} Value read
     * @expose
     */
    ByteBufferPrototype.readInt8 = function(offset) {
        var relative = typeof offset === 'undefined';
        if (relative) offset = this.offset;
        if (!this.noAssert) {
            if (typeof offset !== 'number' || offset % 1 !== 0)
                throw TypeError("Illegal offset: "+offset+" (not an integer)");
            offset >>>= 0;
            if (offset < 0 || offset + 1 > this.buffer.byteLength)
                throw RangeError("Illegal offset: 0 <= "+offset+" (+"+1+") <= "+this.buffer.byteLength);
        }
        var value = this.view[offset];
        if ((value & 0x80) === 0x80) value = -(0xFF - value + 1); // Cast to signed
        if (relative) this.offset += 1;
        return value;
    };

    /**
     * Reads an 8bit signed integer. This is an alias of {@link ByteBuffer#readInt8}.
     * @function
     * @param {number=} offset Offset to read from. Will use and advance {@link ByteBuffer#offset} by `1` if omitted.
     * @returns {number} Value read
     * @expose
     */
    ByteBufferPrototype.readByte = ByteBufferPrototype.readInt8;

    /**
     * Writes an 8bit unsigned integer.
     * @param {number} value Value to write
     * @param {number=} offset Offset to write to. Will use and advance {@link ByteBuffer#offset} by `1` if omitted.
     * @returns {!ByteBuffer} this
     * @expose
     */
    ByteBufferPrototype.writeUint8 = function(value, offset) {
        var relative = typeof offset === 'undefined';
        if (relative) offset = this.offset;
        if (!this.noAssert) {
            if (typeof value !== 'number' || value % 1 !== 0)
                throw TypeError("Illegal value: "+value+" (not an integer)");
            value >>>= 0;
            if (typeof offset !== 'number' || offset % 1 !== 0)
                throw TypeError("Illegal offset: "+offset+" (not an integer)");
            offset >>>= 0;
            if (offset < 0 || offset + 0 > this.buffer.byteLength)
                throw RangeError("Illegal offset: 0 <= "+offset+" (+"+0+") <= "+this.buffer.byteLength);
        }
        offset += 1;
        var capacity1 = this.buffer.byteLength;
        if (offset > capacity1)
            this.resize((capacity1 *= 2) > offset ? capacity1 : offset);
        offset -= 1;
        this.view[offset] = value;
        if (relative) this.offset += 1;
        return this;
    };

    /**
     * Writes an 8bit unsigned integer. This is an alias of {@link ByteBuffer#writeUint8}.
     * @function
     * @param {number} value Value to write
     * @param {number=} offset Offset to write to. Will use and advance {@link ByteBuffer#offset} by `1` if omitted.
     * @returns {!ByteBuffer} this
     * @expose
     */
    ByteBufferPrototype.writeUInt8 = ByteBufferPrototype.writeUint8;

    /**
     * Reads an 8bit unsigned integer.
     * @param {number=} offset Offset to read from. Will use and advance {@link ByteBuffer#offset} by `1` if omitted.
     * @returns {number} Value read
     * @expose
     */
    ByteBufferPrototype.readUint8 = function(offset) {
        var relative = typeof offset === 'undefined';
        if (relative) offset = this.offset;
        if (!this.noAssert) {
            if (typeof offset !== 'number' || offset % 1 !== 0)
                throw TypeError("Illegal offset: "+offset+" (not an integer)");
            offset >>>= 0;
            if (offset < 0 || offset + 1 > this.buffer.byteLength)
                throw RangeError("Illegal offset: 0 <= "+offset+" (+"+1+") <= "+this.buffer.byteLength);
        }
        var value = this.view[offset];
        if (relative) this.offset += 1;
        return value;
    };

    /**
     * Reads an 8bit unsigned integer. This is an alias of {@link ByteBuffer#readUint8}.
     * @function
     * @param {number=} offset Offset to read from. Will use and advance {@link ByteBuffer#offset} by `1` if omitted.
     * @returns {number} Value read
     * @expose
     */
    ByteBufferPrototype.readUInt8 = ByteBufferPrototype.readUint8;

    // types/ints/int16

    /**
     * Writes a 16bit signed integer.
     * @param {number} value Value to write
     * @param {number=} offset Offset to write to. Will use and advance {@link ByteBuffer#offset} by `2` if omitted.
     * @throws {TypeError} If `offset` or `value` is not a valid number
     * @throws {RangeError} If `offset` is out of bounds
     * @expose
     */
    ByteBufferPrototype.writeInt16 = function(value, offset) {
        var relative = typeof offset === 'undefined';
        if (relative) offset = this.offset;
        if (!this.noAssert) {
            if (typeof value !== 'number' || value % 1 !== 0)
                throw TypeError("Illegal value: "+value+" (not an integer)");
            value |= 0;
            if (typeof offset !== 'number' || offset % 1 !== 0)
                throw TypeError("Illegal offset: "+offset+" (not an integer)");
            offset >>>= 0;
            if (offset < 0 || offset + 0 > this.buffer.byteLength)
                throw RangeError("Illegal offset: 0 <= "+offset+" (+"+0+") <= "+this.buffer.byteLength);
        }
        offset += 2;
        var capacity2 = this.buffer.byteLength;
        if (offset > capacity2)
            this.resize((capacity2 *= 2) > offset ? capacity2 : offset);
        offset -= 2;
        if (this.littleEndian) {
            this.view[offset+1] = (value & 0xFF00) >>> 8;
            this.view[offset  ] =  value & 0x00FF;
        } else {
            this.view[offset]   = (value & 0xFF00) >>> 8;
            this.view[offset+1] =  value & 0x00FF;
        }
        if (relative) this.offset += 2;
        return this;
    };

    /**
     * Writes a 16bit signed integer. This is an alias of {@link ByteBuffer#writeInt16}.
     * @function
     * @param {number} value Value to write
     * @param {number=} offset Offset to write to. Will use and advance {@link ByteBuffer#offset} by `2` if omitted.
     * @throws {TypeError} If `offset` or `value` is not a valid number
     * @throws {RangeError} If `offset` is out of bounds
     * @expose
     */
    ByteBufferPrototype.writeShort = ByteBufferPrototype.writeInt16;

    /**
     * Reads a 16bit signed integer.
     * @param {number=} offset Offset to read from. Will use and advance {@link ByteBuffer#offset} by `2` if omitted.
     * @returns {number} Value read
     * @throws {TypeError} If `offset` is not a valid number
     * @throws {RangeError} If `offset` is out of bounds
     * @expose
     */
    ByteBufferPrototype.readInt16 = function(offset) {
        var relative = typeof offset === 'undefined';
        if (relative) offset = this.offset;
        if (!this.noAssert) {
            if (typeof offset !== 'number' || offset % 1 !== 0)
                throw TypeError("Illegal offset: "+offset+" (not an integer)");
            offset >>>= 0;
            if (offset < 0 || offset + 2 > this.buffer.byteLength)
                throw RangeError("Illegal offset: 0 <= "+offset+" (+"+2+") <= "+this.buffer.byteLength);
        }
        var value = 0;
        if (this.littleEndian) {
            value  = this.view[offset  ];
            value |= this.view[offset+1] << 8;
        } else {
            value  = this.view[offset  ] << 8;
            value |= this.view[offset+1];
        }
        if ((value & 0x8000) === 0x8000) value = -(0xFFFF - value + 1); // Cast to signed
        if (relative) this.offset += 2;
        return value;
    };

    /**
     * Reads a 16bit signed integer. This is an alias of {@link ByteBuffer#readInt16}.
     * @function
     * @param {number=} offset Offset to read from. Will use and advance {@link ByteBuffer#offset} by `2` if omitted.
     * @returns {number} Value read
     * @throws {TypeError} If `offset` is not a valid number
     * @throws {RangeError} If `offset` is out of bounds
     * @expose
     */
    ByteBufferPrototype.readShort = ByteBufferPrototype.readInt16;

    /**
     * Writes a 16bit unsigned integer.
     * @param {number} value Value to write
     * @param {number=} offset Offset to write to. Will use and advance {@link ByteBuffer#offset} by `2` if omitted.
     * @throws {TypeError} If `offset` or `value` is not a valid number
     * @throws {RangeError} If `offset` is out of bounds
     * @expose
     */
    ByteBufferPrototype.writeUint16 = function(value, offset) {
        var relative = typeof offset === 'undefined';
        if (relative) offset = this.offset;
        if (!this.noAssert) {
            if (typeof value !== 'number' || value % 1 !== 0)
                throw TypeError("Illegal value: "+value+" (not an integer)");
            value >>>= 0;
            if (typeof offset !== 'number' || offset % 1 !== 0)
                throw TypeError("Illegal offset: "+offset+" (not an integer)");
            offset >>>= 0;
            if (offset < 0 || offset + 0 > this.buffer.byteLength)
                throw RangeError("Illegal offset: 0 <= "+offset+" (+"+0+") <= "+this.buffer.byteLength);
        }
        offset += 2;
        var capacity3 = this.buffer.byteLength;
        if (offset > capacity3)
            this.resize((capacity3 *= 2) > offset ? capacity3 : offset);
        offset -= 2;
        if (this.littleEndian) {
            this.view[offset+1] = (value & 0xFF00) >>> 8;
            this.view[offset  ] =  value & 0x00FF;
        } else {
            this.view[offset]   = (value & 0xFF00) >>> 8;
            this.view[offset+1] =  value & 0x00FF;
        }
        if (relative) this.offset += 2;
        return this;
    };

    /**
     * Writes a 16bit unsigned integer. This is an alias of {@link ByteBuffer#writeUint16}.
     * @function
     * @param {number} value Value to write
     * @param {number=} offset Offset to write to. Will use and advance {@link ByteBuffer#offset} by `2` if omitted.
     * @throws {TypeError} If `offset` or `value` is not a valid number
     * @throws {RangeError} If `offset` is out of bounds
     * @expose
     */
    ByteBufferPrototype.writeUInt16 = ByteBufferPrototype.writeUint16;

    /**
     * Reads a 16bit unsigned integer.
     * @param {number=} offset Offset to read from. Will use and advance {@link ByteBuffer#offset} by `2` if omitted.
     * @returns {number} Value read
     * @throws {TypeError} If `offset` is not a valid number
     * @throws {RangeError} If `offset` is out of bounds
     * @expose
     */
    ByteBufferPrototype.readUint16 = function(offset) {
        var relative = typeof offset === 'undefined';
        if (relative) offset = this.offset;
        if (!this.noAssert) {
            if (typeof offset !== 'number' || offset % 1 !== 0)
                throw TypeError("Illegal offset: "+offset+" (not an integer)");
            offset >>>= 0;
            if (offset < 0 || offset + 2 > this.buffer.byteLength)
                throw RangeError("Illegal offset: 0 <= "+offset+" (+"+2+") <= "+this.buffer.byteLength);
        }
        var value = 0;
        if (this.littleEndian) {
            value  = this.view[offset  ];
            value |= this.view[offset+1] << 8;
        } else {
            value  = this.view[offset  ] << 8;
            value |= this.view[offset+1];
        }
        if (relative) this.offset += 2;
        return value;
    };

    /**
     * Reads a 16bit unsigned integer. This is an alias of {@link ByteBuffer#readUint16}.
     * @function
     * @param {number=} offset Offset to read from. Will use and advance {@link ByteBuffer#offset} by `2` if omitted.
     * @returns {number} Value read
     * @throws {TypeError} If `offset` is not a valid number
     * @throws {RangeError} If `offset` is out of bounds
     * @expose
     */
    ByteBufferPrototype.readUInt16 = ByteBufferPrototype.readUint16;

    // types/ints/int32

    /**
     * Writes a 32bit signed integer.
     * @param {number} value Value to write
     * @param {number=} offset Offset to write to. Will use and increase {@link ByteBuffer#offset} by `4` if omitted.
     * @expose
     */
    ByteBufferPrototype.writeInt32 = function(value, offset) {
        var relative = typeof offset === 'undefined';
        if (relative) offset = this.offset;
        if (!this.noAssert) {
            if (typeof value !== 'number' || value % 1 !== 0)
                throw TypeError("Illegal value: "+value+" (not an integer)");
            value |= 0;
            if (typeof offset !== 'number' || offset % 1 !== 0)
                throw TypeError("Illegal offset: "+offset+" (not an integer)");
            offset >>>= 0;
            if (offset < 0 || offset + 0 > this.buffer.byteLength)
                throw RangeError("Illegal offset: 0 <= "+offset+" (+"+0+") <= "+this.buffer.byteLength);
        }
        offset += 4;
        var capacity4 = this.buffer.byteLength;
        if (offset > capacity4)
            this.resize((capacity4 *= 2) > offset ? capacity4 : offset);
        offset -= 4;
        if (this.littleEndian) {
            this.view[offset+3] = (value >>> 24) & 0xFF;
            this.view[offset+2] = (value >>> 16) & 0xFF;
            this.view[offset+1] = (value >>>  8) & 0xFF;
            this.view[offset  ] =  value         & 0xFF;
        } else {
            this.view[offset  ] = (value >>> 24) & 0xFF;
            this.view[offset+1] = (value >>> 16) & 0xFF;
            this.view[offset+2] = (value >>>  8) & 0xFF;
            this.view[offset+3] =  value         & 0xFF;
        }
        if (relative) this.offset += 4;
        return this;
    };

    /**
     * Writes a 32bit signed integer. This is an alias of {@link ByteBuffer#writeInt32}.
     * @param {number} value Value to write
     * @param {number=} offset Offset to write to. Will use and increase {@link ByteBuffer#offset} by `4` if omitted.
     * @expose
     */
    ByteBufferPrototype.writeInt = ByteBufferPrototype.writeInt32;

    /**
     * Reads a 32bit signed integer.
     * @param {number=} offset Offset to read from. Will use and increase {@link ByteBuffer#offset} by `4` if omitted.
     * @returns {number} Value read
     * @expose
     */
    ByteBufferPrototype.readInt32 = function(offset) {
        var relative = typeof offset === 'undefined';
        if (relative) offset = this.offset;
        if (!this.noAssert) {
            if (typeof offset !== 'number' || offset % 1 !== 0)
                throw TypeError("Illegal offset: "+offset+" (not an integer)");
            offset >>>= 0;
            if (offset < 0 || offset + 4 > this.buffer.byteLength)
                throw RangeError("Illegal offset: 0 <= "+offset+" (+"+4+") <= "+this.buffer.byteLength);
        }
        var value = 0;
        if (this.littleEndian) {
            value  = this.view[offset+2] << 16;
            value |= this.view[offset+1] <<  8;
            value |= this.view[offset  ];
            value += this.view[offset+3] << 24 >>> 0;
        } else {
            value  = this.view[offset+1] << 16;
            value |= this.view[offset+2] <<  8;
            value |= this.view[offset+3];
            value += this.view[offset  ] << 24 >>> 0;
        }
        value |= 0; // Cast to signed
        if (relative) this.offset += 4;
        return value;
    };

    /**
     * Reads a 32bit signed integer. This is an alias of {@link ByteBuffer#readInt32}.
     * @param {number=} offset Offset to read from. Will use and advance {@link ByteBuffer#offset} by `4` if omitted.
     * @returns {number} Value read
     * @expose
     */
    ByteBufferPrototype.readInt = ByteBufferPrototype.readInt32;

    /**
     * Writes a 32bit unsigned integer.
     * @param {number} value Value to write
     * @param {number=} offset Offset to write to. Will use and increase {@link ByteBuffer#offset} by `4` if omitted.
     * @expose
     */
    ByteBufferPrototype.writeUint32 = function(value, offset) {
        var relative = typeof offset === 'undefined';
        if (relative) offset = this.offset;
        if (!this.noAssert) {
            if (typeof value !== 'number' || value % 1 !== 0)
                throw TypeError("Illegal value: "+value+" (not an integer)");
            value >>>= 0;
            if (typeof offset !== 'number' || offset % 1 !== 0)
                throw TypeError("Illegal offset: "+offset+" (not an integer)");
            offset >>>= 0;
            if (offset < 0 || offset + 0 > this.buffer.byteLength)
                throw RangeError("Illegal offset: 0 <= "+offset+" (+"+0+") <= "+this.buffer.byteLength);
        }
        offset += 4;
        var capacity5 = this.buffer.byteLength;
        if (offset > capacity5)
            this.resize((capacity5 *= 2) > offset ? capacity5 : offset);
        offset -= 4;
        if (this.littleEndian) {
            this.view[offset+3] = (value >>> 24) & 0xFF;
            this.view[offset+2] = (value >>> 16) & 0xFF;
            this.view[offset+1] = (value >>>  8) & 0xFF;
            this.view[offset  ] =  value         & 0xFF;
        } else {
            this.view[offset  ] = (value >>> 24) & 0xFF;
            this.view[offset+1] = (value >>> 16) & 0xFF;
            this.view[offset+2] = (value >>>  8) & 0xFF;
            this.view[offset+3] =  value         & 0xFF;
        }
        if (relative) this.offset += 4;
        return this;
    };

    /**
     * Writes a 32bit unsigned integer. This is an alias of {@link ByteBuffer#writeUint32}.
     * @function
     * @param {number} value Value to write
     * @param {number=} offset Offset to write to. Will use and increase {@link ByteBuffer#offset} by `4` if omitted.
     * @expose
     */
    ByteBufferPrototype.writeUInt32 = ByteBufferPrototype.writeUint32;

    /**
     * Reads a 32bit unsigned integer.
     * @param {number=} offset Offset to read from. Will use and increase {@link ByteBuffer#offset} by `4` if omitted.
     * @returns {number} Value read
     * @expose
     */
    ByteBufferPrototype.readUint32 = function(offset) {
        var relative = typeof offset === 'undefined';
        if (relative) offset = this.offset;
        if (!this.noAssert) {
            if (typeof offset !== 'number' || offset % 1 !== 0)
                throw TypeError("Illegal offset: "+offset+" (not an integer)");
            offset >>>= 0;
            if (offset < 0 || offset + 4 > this.buffer.byteLength)
                throw RangeError("Illegal offset: 0 <= "+offset+" (+"+4+") <= "+this.buffer.byteLength);
        }
        var value = 0;
        if (this.littleEndian) {
            value  = this.view[offset+2] << 16;
            value |= this.view[offset+1] <<  8;
            value |= this.view[offset  ];
            value += this.view[offset+3] << 24 >>> 0;
        } else {
            value  = this.view[offset+1] << 16;
            value |= this.view[offset+2] <<  8;
            value |= this.view[offset+3];
            value += this.view[offset  ] << 24 >>> 0;
        }
        if (relative) this.offset += 4;
        return value;
    };

    /**
     * Reads a 32bit unsigned integer. This is an alias of {@link ByteBuffer#readUint32}.
     * @function
     * @param {number=} offset Offset to read from. Will use and increase {@link ByteBuffer#offset} by `4` if omitted.
     * @returns {number} Value read
     * @expose
     */
    ByteBufferPrototype.readUInt32 = ByteBufferPrototype.readUint32;

    // types/ints/int64

    if (Long) {

        /**
         * Writes a 64bit signed integer.
         * @param {number|!Long} value Value to write
         * @param {number=} offset Offset to write to. Will use and increase {@link ByteBuffer#offset} by `8` if omitted.
         * @returns {!ByteBuffer} this
         * @expose
         */
        ByteBufferPrototype.writeInt64 = function(value, offset) {
            var relative = typeof offset === 'undefined';
            if (relative) offset = this.offset;
            if (!this.noAssert) {
                if (typeof value === 'number')
                    value = Long.fromNumber(value);
                else if (typeof value === 'string')
                    value = Long.fromString(value);
                else if (!(value && value instanceof Long))
                    throw TypeError("Illegal value: "+value+" (not an integer or Long)");
                if (typeof offset !== 'number' || offset % 1 !== 0)
                    throw TypeError("Illegal offset: "+offset+" (not an integer)");
                offset >>>= 0;
                if (offset < 0 || offset + 0 > this.buffer.byteLength)
                    throw RangeError("Illegal offset: 0 <= "+offset+" (+"+0+") <= "+this.buffer.byteLength);
            }
            if (typeof value === 'number')
                value = Long.fromNumber(value);
            else if (typeof value === 'string')
                value = Long.fromString(value);
            offset += 8;
            var capacity6 = this.buffer.byteLength;
            if (offset > capacity6)
                this.resize((capacity6 *= 2) > offset ? capacity6 : offset);
            offset -= 8;
            var lo = value.low,
                hi = value.high;
            if (this.littleEndian) {
                this.view[offset+3] = (lo >>> 24) & 0xFF;
                this.view[offset+2] = (lo >>> 16) & 0xFF;
                this.view[offset+1] = (lo >>>  8) & 0xFF;
                this.view[offset  ] =  lo         & 0xFF;
                offset += 4;
                this.view[offset+3] = (hi >>> 24) & 0xFF;
                this.view[offset+2] = (hi >>> 16) & 0xFF;
                this.view[offset+1] = (hi >>>  8) & 0xFF;
                this.view[offset  ] =  hi         & 0xFF;
            } else {
                this.view[offset  ] = (hi >>> 24) & 0xFF;
                this.view[offset+1] = (hi >>> 16) & 0xFF;
                this.view[offset+2] = (hi >>>  8) & 0xFF;
                this.view[offset+3] =  hi         & 0xFF;
                offset += 4;
                this.view[offset  ] = (lo >>> 24) & 0xFF;
                this.view[offset+1] = (lo >>> 16) & 0xFF;
                this.view[offset+2] = (lo >>>  8) & 0xFF;
                this.view[offset+3] =  lo         & 0xFF;
            }
            if (relative) this.offset += 8;
            return this;
        };

        /**
         * Writes a 64bit signed integer. This is an alias of {@link ByteBuffer#writeInt64}.
         * @param {number|!Long} value Value to write
         * @param {number=} offset Offset to write to. Will use and increase {@link ByteBuffer#offset} by `8` if omitted.
         * @returns {!ByteBuffer} this
         * @expose
         */
        ByteBufferPrototype.writeLong = ByteBufferPrototype.writeInt64;

        /**
         * Reads a 64bit signed integer.
         * @param {number=} offset Offset to read from. Will use and increase {@link ByteBuffer#offset} by `8` if omitted.
         * @returns {!Long}
         * @expose
         */
        ByteBufferPrototype.readInt64 = function(offset) {
            var relative = typeof offset === 'undefined';
            if (relative) offset = this.offset;
            if (!this.noAssert) {
                if (typeof offset !== 'number' || offset % 1 !== 0)
                    throw TypeError("Illegal offset: "+offset+" (not an integer)");
                offset >>>= 0;
                if (offset < 0 || offset + 8 > this.buffer.byteLength)
                    throw RangeError("Illegal offset: 0 <= "+offset+" (+"+8+") <= "+this.buffer.byteLength);
            }
            var lo = 0,
                hi = 0;
            if (this.littleEndian) {
                lo  = this.view[offset+2] << 16;
                lo |= this.view[offset+1] <<  8;
                lo |= this.view[offset  ];
                lo += this.view[offset+3] << 24 >>> 0;
                offset += 4;
                hi  = this.view[offset+2] << 16;
                hi |= this.view[offset+1] <<  8;
                hi |= this.view[offset  ];
                hi += this.view[offset+3] << 24 >>> 0;
            } else {
                hi  = this.view[offset+1] << 16;
                hi |= this.view[offset+2] <<  8;
                hi |= this.view[offset+3];
                hi += this.view[offset  ] << 24 >>> 0;
                offset += 4;
                lo  = this.view[offset+1] << 16;
                lo |= this.view[offset+2] <<  8;
                lo |= this.view[offset+3];
                lo += this.view[offset  ] << 24 >>> 0;
            }
            var value = new Long(lo, hi, false);
            if (relative) this.offset += 8;
            return value;
        };

        /**
         * Reads a 64bit signed integer. This is an alias of {@link ByteBuffer#readInt64}.
         * @param {number=} offset Offset to read from. Will use and increase {@link ByteBuffer#offset} by `8` if omitted.
         * @returns {!Long}
         * @expose
         */
        ByteBufferPrototype.readLong = ByteBufferPrototype.readInt64;

        /**
         * Writes a 64bit unsigned integer.
         * @param {number|!Long} value Value to write
         * @param {number=} offset Offset to write to. Will use and increase {@link ByteBuffer#offset} by `8` if omitted.
         * @returns {!ByteBuffer} this
         * @expose
         */
        ByteBufferPrototype.writeUint64 = function(value, offset) {
            var relative = typeof offset === 'undefined';
            if (relative) offset = this.offset;
            if (!this.noAssert) {
                if (typeof value === 'number')
                    value = Long.fromNumber(value);
                else if (typeof value === 'string')
                    value = Long.fromString(value);
                else if (!(value && value instanceof Long))
                    throw TypeError("Illegal value: "+value+" (not an integer or Long)");
                if (typeof offset !== 'number' || offset % 1 !== 0)
                    throw TypeError("Illegal offset: "+offset+" (not an integer)");
                offset >>>= 0;
                if (offset < 0 || offset + 0 > this.buffer.byteLength)
                    throw RangeError("Illegal offset: 0 <= "+offset+" (+"+0+") <= "+this.buffer.byteLength);
            }
            if (typeof value === 'number')
                value = Long.fromNumber(value);
            else if (typeof value === 'string')
                value = Long.fromString(value);
            offset += 8;
            var capacity7 = this.buffer.byteLength;
            if (offset > capacity7)
                this.resize((capacity7 *= 2) > offset ? capacity7 : offset);
            offset -= 8;
            var lo = value.low,
                hi = value.high;
            if (this.littleEndian) {
                this.view[offset+3] = (lo >>> 24) & 0xFF;
                this.view[offset+2] = (lo >>> 16) & 0xFF;
                this.view[offset+1] = (lo >>>  8) & 0xFF;
                this.view[offset  ] =  lo         & 0xFF;
                offset += 4;
                this.view[offset+3] = (hi >>> 24) & 0xFF;
                this.view[offset+2] = (hi >>> 16) & 0xFF;
                this.view[offset+1] = (hi >>>  8) & 0xFF;
                this.view[offset  ] =  hi         & 0xFF;
            } else {
                this.view[offset  ] = (hi >>> 24) & 0xFF;
                this.view[offset+1] = (hi >>> 16) & 0xFF;
                this.view[offset+2] = (hi >>>  8) & 0xFF;
                this.view[offset+3] =  hi         & 0xFF;
                offset += 4;
                this.view[offset  ] = (lo >>> 24) & 0xFF;
                this.view[offset+1] = (lo >>> 16) & 0xFF;
                this.view[offset+2] = (lo >>>  8) & 0xFF;
                this.view[offset+3] =  lo         & 0xFF;
            }
            if (relative) this.offset += 8;
            return this;
        };

        /**
         * Writes a 64bit unsigned integer. This is an alias of {@link ByteBuffer#writeUint64}.
         * @function
         * @param {number|!Long} value Value to write
         * @param {number=} offset Offset to write to. Will use and increase {@link ByteBuffer#offset} by `8` if omitted.
         * @returns {!ByteBuffer} this
         * @expose
         */
        ByteBufferPrototype.writeUInt64 = ByteBufferPrototype.writeUint64;

        /**
         * Reads a 64bit unsigned integer.
         * @param {number=} offset Offset to read from. Will use and increase {@link ByteBuffer#offset} by `8` if omitted.
         * @returns {!Long}
         * @expose
         */
        ByteBufferPrototype.readUint64 = function(offset) {
            var relative = typeof offset === 'undefined';
            if (relative) offset = this.offset;
            if (!this.noAssert) {
                if (typeof offset !== 'number' || offset % 1 !== 0)
                    throw TypeError("Illegal offset: "+offset+" (not an integer)");
                offset >>>= 0;
                if (offset < 0 || offset + 8 > this.buffer.byteLength)
                    throw RangeError("Illegal offset: 0 <= "+offset+" (+"+8+") <= "+this.buffer.byteLength);
            }
            var lo = 0,
                hi = 0;
            if (this.littleEndian) {
                lo  = this.view[offset+2] << 16;
                lo |= this.view[offset+1] <<  8;
                lo |= this.view[offset  ];
                lo += this.view[offset+3] << 24 >>> 0;
                offset += 4;
                hi  = this.view[offset+2] << 16;
                hi |= this.view[offset+1] <<  8;
                hi |= this.view[offset  ];
                hi += this.view[offset+3] << 24 >>> 0;
            } else {
                hi  = this.view[offset+1] << 16;
                hi |= this.view[offset+2] <<  8;
                hi |= this.view[offset+3];
                hi += this.view[offset  ] << 24 >>> 0;
                offset += 4;
                lo  = this.view[offset+1] << 16;
                lo |= this.view[offset+2] <<  8;
                lo |= this.view[offset+3];
                lo += this.view[offset  ] << 24 >>> 0;
            }
            var value = new Long(lo, hi, true);
            if (relative) this.offset += 8;
            return value;
        };

        /**
         * Reads a 64bit unsigned integer. This is an alias of {@link ByteBuffer#readUint64}.
         * @function
         * @param {number=} offset Offset to read from. Will use and increase {@link ByteBuffer#offset} by `8` if omitted.
         * @returns {!Long}
         * @expose
         */
        ByteBufferPrototype.readUInt64 = ByteBufferPrototype.readUint64;

    } // Long


    // types/floats/float32

    /*
     ieee754 - https://github.com/feross/ieee754

     The MIT License (MIT)

     Copyright (c) Feross Aboukhadijeh

     Permission is hereby granted, free of charge, to any person obtaining a copy
     of this software and associated documentation files (the "Software"), to deal
     in the Software without restriction, including without limitation the rights
     to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     copies of the Software, and to permit persons to whom the Software is
     furnished to do so, subject to the following conditions:

     The above copyright notice and this permission notice shall be included in
     all copies or substantial portions of the Software.

     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
     AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
     THE SOFTWARE.
    */

    /**
     * Reads an IEEE754 float from a byte array.
     * @param {!Array} buffer
     * @param {number} offset
     * @param {boolean} isLE
     * @param {number} mLen
     * @param {number} nBytes
     * @returns {number}
     * @inner
     */
    function ieee754_read(buffer, offset, isLE, mLen, nBytes) {
        var e, m,
            eLen = nBytes * 8 - mLen - 1,
            eMax = (1 << eLen) - 1,
            eBias = eMax >> 1,
            nBits = -7,
            i = isLE ? (nBytes - 1) : 0,
            d = isLE ? -1 : 1,
            s = buffer[offset + i];

        i += d;

        e = s & ((1 << (-nBits)) - 1);
        s >>= (-nBits);
        nBits += eLen;
        for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8) {}

        m = e & ((1 << (-nBits)) - 1);
        e >>= (-nBits);
        nBits += mLen;
        for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8) {}

        if (e === 0) {
            e = 1 - eBias;
        } else if (e === eMax) {
            return m ? NaN : ((s ? -1 : 1) * Infinity);
        } else {
            m = m + Math.pow(2, mLen);
            e = e - eBias;
        }
        return (s ? -1 : 1) * m * Math.pow(2, e - mLen);
    }

    /**
     * Writes an IEEE754 float to a byte array.
     * @param {!Array} buffer
     * @param {number} value
     * @param {number} offset
     * @param {boolean} isLE
     * @param {number} mLen
     * @param {number} nBytes
     * @inner
     */
    function ieee754_write(buffer, value, offset, isLE, mLen, nBytes) {
        var e, m, c,
            eLen = nBytes * 8 - mLen - 1,
            eMax = (1 << eLen) - 1,
            eBias = eMax >> 1,
            rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0),
            i = isLE ? 0 : (nBytes - 1),
            d = isLE ? 1 : -1,
            s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0;

        value = Math.abs(value);

        if (isNaN(value) || value === Infinity) {
            m = isNaN(value) ? 1 : 0;
            e = eMax;
        } else {
            e = Math.floor(Math.log(value) / Math.LN2);
            if (value * (c = Math.pow(2, -e)) < 1) {
                e--;
                c *= 2;
            }
            if (e + eBias >= 1) {
                value += rt / c;
            } else {
                value += rt * Math.pow(2, 1 - eBias);
            }
            if (value * c >= 2) {
                e++;
                c /= 2;
            }

            if (e + eBias >= eMax) {
                m = 0;
                e = eMax;
            } else if (e + eBias >= 1) {
                m = (value * c - 1) * Math.pow(2, mLen);
                e = e + eBias;
            } else {
                m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen);
                e = 0;
            }
        }

        for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}

        e = (e << mLen) | m;
        eLen += mLen;
        for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}

        buffer[offset + i - d] |= s * 128;
    }

    /**
     * Writes a 32bit float.
     * @param {number} value Value to write
     * @param {number=} offset Offset to write to. Will use and increase {@link ByteBuffer#offset} by `4` if omitted.
     * @returns {!ByteBuffer} this
     * @expose
     */
    ByteBufferPrototype.writeFloat32 = function(value, offset) {
        var relative = typeof offset === 'undefined';
        if (relative) offset = this.offset;
        if (!this.noAssert) {
            if (typeof value !== 'number')
                throw TypeError("Illegal value: "+value+" (not a number)");
            if (typeof offset !== 'number' || offset % 1 !== 0)
                throw TypeError("Illegal offset: "+offset+" (not an integer)");
            offset >>>= 0;
            if (offset < 0 || offset + 0 > this.buffer.byteLength)
                throw RangeError("Illegal offset: 0 <= "+offset+" (+"+0+") <= "+this.buffer.byteLength);
        }
        offset += 4;
        var capacity8 = this.buffer.byteLength;
        if (offset > capacity8)
            this.resize((capacity8 *= 2) > offset ? capacity8 : offset);
        offset -= 4;
        ieee754_write(this.view, value, offset, this.littleEndian, 23, 4);
        if (relative) this.offset += 4;
        return this;
    };

    /**
     * Writes a 32bit float. This is an alias of {@link ByteBuffer#writeFloat32}.
     * @function
     * @param {number} value Value to write
     * @param {number=} offset Offset to write to. Will use and increase {@link ByteBuffer#offset} by `4` if omitted.
     * @returns {!ByteBuffer} this
     * @expose
     */
    ByteBufferPrototype.writeFloat = ByteBufferPrototype.writeFloat32;

    /**
     * Reads a 32bit float.
     * @param {number=} offset Offset to read from. Will use and increase {@link ByteBuffer#offset} by `4` if omitted.
     * @returns {number}
     * @expose
     */
    ByteBufferPrototype.readFloat32 = function(offset) {
        var relative = typeof offset === 'undefined';
        if (relative) offset = this.offset;
        if (!this.noAssert) {
            if (typeof offset !== 'number' || offset % 1 !== 0)
                throw TypeError("Illegal offset: "+offset+" (not an integer)");
            offset >>>= 0;
            if (offset < 0 || offset + 4 > this.buffer.byteLength)
                throw RangeError("Illegal offset: 0 <= "+offset+" (+"+4+") <= "+this.buffer.byteLength);
        }
        var value = ieee754_read(this.view, offset, this.littleEndian, 23, 4);
        if (relative) this.offset += 4;
        return value;
    };

    /**
     * Reads a 32bit float. This is an alias of {@link ByteBuffer#readFloat32}.
     * @function
     * @param {number=} offset Offset to read from. Will use and increase {@link ByteBuffer#offset} by `4` if omitted.
     * @returns {number}
     * @expose
     */
    ByteBufferPrototype.readFloat = ByteBufferPrototype.readFloat32;

    // types/floats/float64

    /**
     * Writes a 64bit float.
     * @param {number} value Value to write
     * @param {number=} offset Offset to write to. Will use and increase {@link ByteBuffer#offset} by `8` if omitted.
     * @returns {!ByteBuffer} this
     * @expose
     */
    ByteBufferPrototype.writeFloat64 = function(value, offset) {
        var relative = typeof offset === 'undefined';
        if (relative) offset = this.offset;
        if (!this.noAssert) {
            if (typeof value !== 'number')
                throw TypeError("Illegal value: "+value+" (not a number)");
            if (typeof offset !== 'number' || offset % 1 !== 0)
                throw TypeError("Illegal offset: "+offset+" (not an integer)");
            offset >>>= 0;
            if (offset < 0 || offset + 0 > this.buffer.byteLength)
                throw RangeError("Illegal offset: 0 <= "+offset+" (+"+0+") <= "+this.buffer.byteLength);
        }
        offset += 8;
        var capacity9 = this.buffer.byteLength;
        if (offset > capacity9)
            this.resize((capacity9 *= 2) > offset ? capacity9 : offset);
        offset -= 8;
        ieee754_write(this.view, value, offset, this.littleEndian, 52, 8);
        if (relative) this.offset += 8;
        return this;
    };

    /**
     * Writes a 64bit float. This is an alias of {@link ByteBuffer#writeFloat64}.
     * @function
     * @param {number} value Value to write
     * @param {number=} offset Offset to write to. Will use and increase {@link ByteBuffer#offset} by `8` if omitted.
     * @returns {!ByteBuffer} this
     * @expose
     */
    ByteBufferPrototype.writeDouble = ByteBufferPrototype.writeFloat64;

    /**
     * Reads a 64bit float.
     * @param {number=} offset Offset to read from. Will use and increase {@link ByteBuffer#offset} by `8` if omitted.
     * @returns {number}
     * @expose
     */
    ByteBufferPrototype.readFloat64 = function(offset) {
        var relative = typeof offset === 'undefined';
        if (relative) offset = this.offset;
        if (!this.noAssert) {
            if (typeof offset !== 'number' || offset % 1 !== 0)
                throw TypeError("Illegal offset: "+offset+" (not an integer)");
            offset >>>= 0;
            if (offset < 0 || offset + 8 > this.buffer.byteLength)
                throw RangeError("Illegal offset: 0 <= "+offset+" (+"+8+") <= "+this.buffer.byteLength);
        }
        var value = ieee754_read(this.view, offset, this.littleEndian, 52, 8);
        if (relative) this.offset += 8;
        return value;
    };

    /**
     * Reads a 64bit float. This is an alias of {@link ByteBuffer#readFloat64}.
     * @function
     * @param {number=} offset Offset to read from. Will use and increase {@link ByteBuffer#offset} by `8` if omitted.
     * @returns {number}
     * @expose
     */
    ByteBufferPrototype.readDouble = ByteBufferPrototype.readFloat64;


    // types/varints/varint32

    /**
     * Maximum number of bytes required to store a 32bit base 128 variable-length integer.
     * @type {number}
     * @const
     * @expose
     */
    ByteBuffer.MAX_VARINT32_BYTES = 5;

    /**
     * Calculates the actual number of bytes required to store a 32bit base 128 variable-length integer.
     * @param {number} value Value to encode
     * @returns {number} Number of bytes required. Capped to {@link ByteBuffer.MAX_VARINT32_BYTES}
     * @expose
     */
    ByteBuffer.calculateVarint32 = function(value) {
        // ref: src/google/protobuf/io/coded_stream.cc
        value = value >>> 0;
             if (value < 1 << 7 ) return 1;
        else if (value < 1 << 14) return 2;
        else if (value < 1 << 21) return 3;
        else if (value < 1 << 28) return 4;
        else                      return 5;
    };

    /**
     * Zigzag encodes a signed 32bit integer so that it can be effectively used with varint encoding.
     * @param {number} n Signed 32bit integer
     * @returns {number} Unsigned zigzag encoded 32bit integer
     * @expose
     */
    ByteBuffer.zigZagEncode32 = function(n) {
        return (((n |= 0) << 1) ^ (n >> 31)) >>> 0; // ref: src/google/protobuf/wire_format_lite.h
    };

    /**
     * Decodes a zigzag encoded signed 32bit integer.
     * @param {number} n Unsigned zigzag encoded 32bit integer
     * @returns {number} Signed 32bit integer
     * @expose
     */
    ByteBuffer.zigZagDecode32 = function(n) {
        return ((n >>> 1) ^ -(n & 1)) | 0; // // ref: src/google/protobuf/wire_format_lite.h
    };

    /**
     * Writes a 32bit base 128 variable-length integer.
     * @param {number} value Value to write
     * @param {number=} offset Offset to write to. Will use and increase {@link ByteBuffer#offset} by the number of bytes
     *  written if omitted.
     * @returns {!ByteBuffer|number} this if `offset` is omitted, else the actual number of bytes written
     * @expose
     */
    ByteBufferPrototype.writeVarint32 = function(value, offset) {
        var relative = typeof offset === 'undefined';
        if (relative) offset = this.offset;
        if (!this.noAssert) {
            if (typeof value !== 'number' || value % 1 !== 0)
                throw TypeError("Illegal value: "+value+" (not an integer)");
            value |= 0;
            if (typeof offset !== 'number' || offset % 1 !== 0)
                throw TypeError("Illegal offset: "+offset+" (not an integer)");
            offset >>>= 0;
            if (offset < 0 || offset + 0 > this.buffer.byteLength)
                throw RangeError("Illegal offset: 0 <= "+offset+" (+"+0+") <= "+this.buffer.byteLength);
        }
        var size = ByteBuffer.calculateVarint32(value),
            b;
        offset += size;
        var capacity10 = this.buffer.byteLength;
        if (offset > capacity10)
            this.resize((capacity10 *= 2) > offset ? capacity10 : offset);
        offset -= size;
        value >>>= 0;
        while (value >= 0x80) {
            b = (value & 0x7f) | 0x80;
            this.view[offset++] = b;
            value >>>= 7;
        }
        this.view[offset++] = value;
        if (relative) {
            this.offset = offset;
            return this;
        }
        return size;
    };

    /**
     * Writes a zig-zag encoded (signed) 32bit base 128 variable-length integer.
     * @param {number} value Value to write
     * @param {number=} offset Offset to write to. Will use and increase {@link ByteBuffer#offset} by the number of bytes
     *  written if omitted.
     * @returns {!ByteBuffer|number} this if `offset` is omitted, else the actual number of bytes written
     * @expose
     */
    ByteBufferPrototype.writeVarint32ZigZag = function(value, offset) {
        return this.writeVarint32(ByteBuffer.zigZagEncode32(value), offset);
    };

    /**
     * Reads a 32bit base 128 variable-length integer.
     * @param {number=} offset Offset to read from. Will use and increase {@link ByteBuffer#offset} by the number of bytes
     *  written if omitted.
     * @returns {number|!{value: number, length: number}} The value read if offset is omitted, else the value read
     *  and the actual number of bytes read.
     * @throws {Error} If it's not a valid varint. Has a property `truncated = true` if there is not enough data available
     *  to fully decode the varint.
     * @expose
     */
    ByteBufferPrototype.readVarint32 = function(offset) {
        var relative = typeof offset === 'undefined';
        if (relative) offset = this.offset;
        if (!this.noAssert) {
            if (typeof offset !== 'number' || offset % 1 !== 0)
                throw TypeError("Illegal offset: "+offset+" (not an integer)");
            offset >>>= 0;
            if (offset < 0 || offset + 1 > this.buffer.byteLength)
                throw RangeError("Illegal offset: 0 <= "+offset+" (+"+1+") <= "+this.buffer.byteLength);
        }
        var c = 0,
            value = 0 >>> 0,
            b;
        do {
            if (!this.noAssert && offset > this.limit) {
                var err = Error("Truncated");
                err['truncated'] = true;
                throw err;
            }
            b = this.view[offset++];
            if (c < 5)
                value |= (b & 0x7f) << (7*c);
            ++c;
        } while ((b & 0x80) !== 0);
        value |= 0;
        if (relative) {
            this.offset = offset;
            return value;
        }
        return {
            "value": value,
            "length": c
        };
    };

    /**
     * Reads a zig-zag encoded (signed) 32bit base 128 variable-length integer.
     * @param {number=} offset Offset to read from. Will use and increase {@link ByteBuffer#offset} by the number of bytes
     *  written if omitted.
     * @returns {number|!{value: number, length: number}} The value read if offset is omitted, else the value read
     *  and the actual number of bytes read.
     * @throws {Error} If it's not a valid varint
     * @expose
     */
    ByteBufferPrototype.readVarint32ZigZag = function(offset) {
        var val = this.readVarint32(offset);
        if (typeof val === 'object')
            val["value"] = ByteBuffer.zigZagDecode32(val["value"]);
        else
            val = ByteBuffer.zigZagDecode32(val);
        return val;
    };

    // types/varints/varint64

    if (Long) {

        /**
         * Maximum number of bytes required to store a 64bit base 128 variable-length integer.
         * @type {number}
         * @const
         * @expose
         */
        ByteBuffer.MAX_VARINT64_BYTES = 10;

        /**
         * Calculates the actual number of bytes required to store a 64bit base 128 variable-length integer.
         * @param {number|!Long} value Value to encode
         * @returns {number} Number of bytes required. Capped to {@link ByteBuffer.MAX_VARINT64_BYTES}
         * @expose
         */
        ByteBuffer.calculateVarint64 = function(value) {
            if (typeof value === 'number')
                value = Long.fromNumber(value);
            else if (typeof value === 'string')
                value = Long.fromString(value);
            // ref: src/google/protobuf/io/coded_stream.cc
            var part0 = value.toInt() >>> 0,
                part1 = value.shiftRightUnsigned(28).toInt() >>> 0,
                part2 = value.shiftRightUnsigned(56).toInt() >>> 0;
            if (part2 == 0) {
                if (part1 == 0) {
                    if (part0 < 1 << 14)
                        return part0 < 1 << 7 ? 1 : 2;
                    else
                        return part0 < 1 << 21 ? 3 : 4;
                } else {
                    if (part1 < 1 << 14)
                        return part1 < 1 << 7 ? 5 : 6;
                    else
                        return part1 < 1 << 21 ? 7 : 8;
                }
            } else
                return part2 < 1 << 7 ? 9 : 10;
        };

        /**
         * Zigzag encodes a signed 64bit integer so that it can be effectively used with varint encoding.
         * @param {number|!Long} value Signed long
         * @returns {!Long} Unsigned zigzag encoded long
         * @expose
         */
        ByteBuffer.zigZagEncode64 = function(value) {
            if (typeof value === 'number')
                value = Long.fromNumber(value, false);
            else if (typeof value === 'string')
                value = Long.fromString(value, false);
            else if (value.unsigned !== false) value = value.toSigned();
            // ref: src/google/protobuf/wire_format_lite.h
            return value.shiftLeft(1).xor(value.shiftRight(63)).toUnsigned();
        };

        /**
         * Decodes a zigzag encoded signed 64bit integer.
         * @param {!Long|number} value Unsigned zigzag encoded long or JavaScript number
         * @returns {!Long} Signed long
         * @expose
         */
        ByteBuffer.zigZagDecode64 = function(value) {
            if (typeof value === 'number')
                value = Long.fromNumber(value, false);
            else if (typeof value === 'string')
                value = Long.fromString(value, false);
            else if (value.unsigned !== false) value = value.toSigned();
            // ref: src/google/protobuf/wire_format_lite.h
            return value.shiftRightUnsigned(1).xor(value.and(Long.ONE).toSigned().negate()).toSigned();
        };

        /**
         * Writes a 64bit base 128 variable-length integer.
         * @param {number|Long} value Value to write
         * @param {number=} offset Offset to write to. Will use and increase {@link ByteBuffer#offset} by the number of bytes
         *  written if omitted.
         * @returns {!ByteBuffer|number} `this` if offset is omitted, else the actual number of bytes written.
         * @expose
         */
        ByteBufferPrototype.writeVarint64 = function(value, offset) {
            var relative = typeof offset === 'undefined';
            if (relative) offset = this.offset;
            if (!this.noAssert) {
                if (typeof value === 'number')
                    value = Long.fromNumber(value);
                else if (typeof value === 'string')
                    value = Long.fromString(value);
                else if (!(value && value instanceof Long))
                    throw TypeError("Illegal value: "+value+" (not an integer or Long)");
                if (typeof offset !== 'number' || offset % 1 !== 0)
                    throw TypeError("Illegal offset: "+offset+" (not an integer)");
                offset >>>= 0;
                if (offset < 0 || offset + 0 > this.buffer.byteLength)
                    throw RangeError("Illegal offset: 0 <= "+offset+" (+"+0+") <= "+this.buffer.byteLength);
            }
            if (typeof value === 'number')
                value = Long.fromNumber(value, false);
            else if (typeof value === 'string')
                value = Long.fromString(value, false);
            else if (value.unsigned !== false) value = value.toSigned();
            var size = ByteBuffer.calculateVarint64(value),
                part0 = value.toInt() >>> 0,
                part1 = value.shiftRightUnsigned(28).toInt() >>> 0,
                part2 = value.shiftRightUnsigned(56).toInt() >>> 0;
            offset += size;
            var capacity11 = this.buffer.byteLength;
            if (offset > capacity11)
                this.resize((capacity11 *= 2) > offset ? capacity11 : offset);
            offset -= size;
            switch (size) {
                case 10: this.view[offset+9] = (part2 >>>  7) & 0x01;
                case 9 : this.view[offset+8] = size !== 9 ? (part2       ) | 0x80 : (part2       ) & 0x7F;
                case 8 : this.view[offset+7] = size !== 8 ? (part1 >>> 21) | 0x80 : (part1 >>> 21) & 0x7F;
                case 7 : this.view[offset+6] = size !== 7 ? (part1 >>> 14) | 0x80 : (part1 >>> 14) & 0x7F;
                case 6 : this.view[offset+5] = size !== 6 ? (part1 >>>  7) | 0x80 : (part1 >>>  7) & 0x7F;
                case 5 : this.view[offset+4] = size !== 5 ? (part1       ) | 0x80 : (part1       ) & 0x7F;
                case 4 : this.view[offset+3] = size !== 4 ? (part0 >>> 21) | 0x80 : (part0 >>> 21) & 0x7F;
                case 3 : this.view[offset+2] = size !== 3 ? (part0 >>> 14) | 0x80 : (part0 >>> 14) & 0x7F;
                case 2 : this.view[offset+1] = size !== 2 ? (part0 >>>  7) | 0x80 : (part0 >>>  7) & 0x7F;
                case 1 : this.view[offset  ] = size !== 1 ? (part0       ) | 0x80 : (part0       ) & 0x7F;
            }
            if (relative) {
                this.offset += size;
                return this;
            } else {
                return size;
            }
        };

        /**
         * Writes a zig-zag encoded 64bit base 128 variable-length integer.
         * @param {number|Long} value Value to write
         * @param {number=} offset Offset to write to. Will use and increase {@link ByteBuffer#offset} by the number of bytes
         *  written if omitted.
         * @returns {!ByteBuffer|number} `this` if offset is omitted, else the actual number of bytes written.
         * @expose
         */
        ByteBufferPrototype.writeVarint64ZigZag = function(value, offset) {
            return this.writeVarint64(ByteBuffer.zigZagEncode64(value), offset);
        };

        /**
         * Reads a 64bit base 128 variable-length integer. Requires Long.js.
         * @param {number=} offset Offset to read from. Will use and increase {@link ByteBuffer#offset} by the number of bytes
         *  read if omitted.
         * @returns {!Long|!{value: Long, length: number}} The value read if offset is omitted, else the value read and
         *  the actual number of bytes read.
         * @throws {Error} If it's not a valid varint
         * @expose
         */
        ByteBufferPrototype.readVarint64 = function(offset) {
            var relative = typeof offset === 'undefined';
            if (relative) offset = this.offset;
            if (!this.noAssert) {
                if (typeof offset !== 'number' || offset % 1 !== 0)
                    throw TypeError("Illegal offset: "+offset+" (not an integer)");
                offset >>>= 0;
                if (offset < 0 || offset + 1 > this.buffer.byteLength)
                    throw RangeError("Illegal offset: 0 <= "+offset+" (+"+1+") <= "+this.buffer.byteLength);
            }
            // ref: src/google/protobuf/io/coded_stream.cc
            var start = offset,
                part0 = 0,
                part1 = 0,
                part2 = 0,
                b  = 0;
            b = this.view[offset++]; part0  = (b & 0x7F)      ; if ( b & 0x80                                                   ) {
            b = this.view[offset++]; part0 |= (b & 0x7F) <<  7; if ((b & 0x80) || (this.noAssert && typeof b === 'undefined')) {
            b = this.view[offset++]; part0 |= (b & 0x7F) << 14; if ((b & 0x80) || (this.noAssert && typeof b === 'undefined')) {
            b = this.view[offset++]; part0 |= (b & 0x7F) << 21; if ((b & 0x80) || (this.noAssert && typeof b === 'undefined')) {
            b = this.view[offset++]; part1  = (b & 0x7F)      ; if ((b & 0x80) || (this.noAssert && typeof b === 'undefined')) {
            b = this.view[offset++]; part1 |= (b & 0x7F) <<  7; if ((b & 0x80) || (this.noAssert && typeof b === 'undefined')) {
            b = this.view[offset++]; part1 |= (b & 0x7F) << 14; if ((b & 0x80) || (this.noAssert && typeof b === 'undefined')) {
            b = this.view[offset++]; part1 |= (b & 0x7F) << 21; if ((b & 0x80) || (this.noAssert && typeof b === 'undefined')) {
            b = this.view[offset++]; part2  = (b & 0x7F)      ; if ((b & 0x80) || (this.noAssert && typeof b === 'undefined')) {
            b = this.view[offset++]; part2 |= (b & 0x7F) <<  7; if ((b & 0x80) || (this.noAssert && typeof b === 'undefined')) {
            throw Error("Buffer overrun"); }}}}}}}}}}
            var value = Long.fromBits(part0 | (part1 << 28), (part1 >>> 4) | (part2) << 24, false);
            if (relative) {
                this.offset = offset;
                return value;
            } else {
                return {
                    'value': value,
                    'length': offset-start
                };
            }
        };

        /**
         * Reads a zig-zag encoded 64bit base 128 variable-length integer. Requires Long.js.
         * @param {number=} offset Offset to read from. Will use and increase {@link ByteBuffer#offset} by the number of bytes
         *  read if omitted.
         * @returns {!Long|!{value: Long, length: number}} The value read if offset is omitted, else the value read and
         *  the actual number of bytes read.
         * @throws {Error} If it's not a valid varint
         * @expose
         */
        ByteBufferPrototype.readVarint64ZigZag = function(offset) {
            var val = this.readVarint64(offset);
            if (val && val['value'] instanceof Long)
                val["value"] = ByteBuffer.zigZagDecode64(val["value"]);
            else
                val = ByteBuffer.zigZagDecode64(val);
            return val;
        };

    } // Long


    // types/strings/cstring

    /**
     * Writes a NULL-terminated UTF8 encoded string. For this to work the specified string must not contain any NULL
     *  characters itself.
     * @param {string} str String to write
     * @param {number=} offset Offset to write to. Will use and increase {@link ByteBuffer#offset} by the number of bytes
     *  contained in `str` + 1 if omitted.
     * @returns {!ByteBuffer|number} this if offset is omitted, else the actual number of bytes written
     * @expose
     */
    ByteBufferPrototype.writeCString = function(str, offset) {
        var relative = typeof offset === 'undefined';
        if (relative) offset = this.offset;
        var i,
            k = str.length;
        if (!this.noAssert) {
            if (typeof str !== 'string')
                throw TypeError("Illegal str: Not a string");
            for (i=0; i<k; ++i) {
                if (str.charCodeAt(i) === 0)
                    throw RangeError("Illegal str: Contains NULL-characters");
            }
            if (typeof offset !== 'number' || offset % 1 !== 0)
                throw TypeError("Illegal offset: "+offset+" (not an integer)");
            offset >>>= 0;
            if (offset < 0 || offset + 0 > this.buffer.byteLength)
                throw RangeError("Illegal offset: 0 <= "+offset+" (+"+0+") <= "+this.buffer.byteLength);
        }
        // UTF8 strings do not contain zero bytes in between except for the zero character, so:
        k = utfx.calculateUTF16asUTF8(stringSource(str))[1];
        offset += k+1;
        var capacity12 = this.buffer.byteLength;
        if (offset > capacity12)
            this.resize((capacity12 *= 2) > offset ? capacity12 : offset);
        offset -= k+1;
        utfx.encodeUTF16toUTF8(stringSource(str), function(b) {
            this.view[offset++] = b;
        }.bind(this));
        this.view[offset++] = 0;
        if (relative) {
            this.offset = offset;
            return this;
        }
        return k;
    };

    /**
     * Reads a NULL-terminated UTF8 encoded string. For this to work the string read must not contain any NULL characters
     *  itself.
     * @param {number=} offset Offset to read from. Will use and increase {@link ByteBuffer#offset} by the number of bytes
     *  read if omitted.
     * @returns {string|!{string: string, length: number}} The string read if offset is omitted, else the string
     *  read and the actual number of bytes read.
     * @expose
     */
    ByteBufferPrototype.readCString = function(offset) {
        var relative = typeof offset === 'undefined';
        if (relative) offset = this.offset;
        if (!this.noAssert) {
            if (typeof offset !== 'number' || offset % 1 !== 0)
                throw TypeError("Illegal offset: "+offset+" (not an integer)");
            offset >>>= 0;
            if (offset < 0 || offset + 1 > this.buffer.byteLength)
                throw RangeError("Illegal offset: 0 <= "+offset+" (+"+1+") <= "+this.buffer.byteLength);
        }
        var start = offset,
            temp;
        // UTF8 strings do not contain zero bytes in between except for the zero character itself, so:
        var sd, b = -1;
        utfx.decodeUTF8toUTF16(function() {
            if (b === 0) return null;
            if (offset >= this.limit)
                throw RangeError("Illegal range: Truncated data, "+offset+" < "+this.limit);
            b = this.view[offset++];
            return b === 0 ? null : b;
        }.bind(this), sd = stringDestination(), true);
        if (relative) {
            this.offset = offset;
            return sd();
        } else {
            return {
                "string": sd(),
                "length": offset - start
            };
        }
    };

    // types/strings/istring

    /**
     * Writes a length as uint32 prefixed UTF8 encoded string.
     * @param {string} str String to write
     * @param {number=} offset Offset to write to. Will use and increase {@link ByteBuffer#offset} by the number of bytes
     *  written if omitted.
     * @returns {!ByteBuffer|number} `this` if `offset` is omitted, else the actual number of bytes written
     * @expose
     * @see ByteBuffer#writeVarint32
     */
    ByteBufferPrototype.writeIString = function(str, offset) {
        var relative = typeof offset === 'undefined';
        if (relative) offset = this.offset;
        if (!this.noAssert) {
            if (typeof str !== 'string')
                throw TypeError("Illegal str: Not a string");
            if (typeof offset !== 'number' || offset % 1 !== 0)
                throw TypeError("Illegal offset: "+offset+" (not an integer)");
            offset >>>= 0;
            if (offset < 0 || offset + 0 > this.buffer.byteLength)
                throw RangeError("Illegal offset: 0 <= "+offset+" (+"+0+") <= "+this.buffer.byteLength);
        }
        var start = offset,
            k;
        k = utfx.calculateUTF16asUTF8(stringSource(str), this.noAssert)[1];
        offset += 4+k;
        var capacity13 = this.buffer.byteLength;
        if (offset > capacity13)
            this.resize((capacity13 *= 2) > offset ? capacity13 : offset);
        offset -= 4+k;
        if (this.littleEndian) {
            this.view[offset+3] = (k >>> 24) & 0xFF;
            this.view[offset+2] = (k >>> 16) & 0xFF;
            this.view[offset+1] = (k >>>  8) & 0xFF;
            this.view[offset  ] =  k         & 0xFF;
        } else {
            this.view[offset  ] = (k >>> 24) & 0xFF;
            this.view[offset+1] = (k >>> 16) & 0xFF;
            this.view[offset+2] = (k >>>  8) & 0xFF;
            this.view[offset+3] =  k         & 0xFF;
        }
        offset += 4;
        utfx.encodeUTF16toUTF8(stringSource(str), function(b) {
            this.view[offset++] = b;
        }.bind(this));
        if (offset !== start + 4 + k)
            throw RangeError("Illegal range: Truncated data, "+offset+" == "+(offset+4+k));
        if (relative) {
            this.offset = offset;
            return this;
        }
        return offset - start;
    };

    /**
     * Reads a length as uint32 prefixed UTF8 encoded string.
     * @param {number=} offset Offset to read from. Will use and increase {@link ByteBuffer#offset} by the number of bytes
     *  read if omitted.
     * @returns {string|!{string: string, length: number}} The string read if offset is omitted, else the string
     *  read and the actual number of bytes read.
     * @expose
     * @see ByteBuffer#readVarint32
     */
    ByteBufferPrototype.readIString = function(offset) {
        var relative = typeof offset === 'undefined';
        if (relative) offset = this.offset;
        if (!this.noAssert) {
            if (typeof offset !== 'number' || offset % 1 !== 0)
                throw TypeError("Illegal offset: "+offset+" (not an integer)");
            offset >>>= 0;
            if (offset < 0 || offset + 4 > this.buffer.byteLength)
                throw RangeError("Illegal offset: 0 <= "+offset+" (+"+4+") <= "+this.buffer.byteLength);
        }
        var start = offset;
        var len = this.readUint32(offset);
        var str = this.readUTF8String(len, ByteBuffer.METRICS_BYTES, offset += 4);
        offset += str['length'];
        if (relative) {
            this.offset = offset;
            return str['string'];
        } else {
            return {
                'string': str['string'],
                'length': offset - start
            };
        }
    };

    // types/strings/utf8string

    /**
     * Metrics representing number of UTF8 characters. Evaluates to `c`.
     * @type {string}
     * @const
     * @expose
     */
    ByteBuffer.METRICS_CHARS = 'c';

    /**
     * Metrics representing number of bytes. Evaluates to `b`.
     * @type {string}
     * @const
     * @expose
     */
    ByteBuffer.METRICS_BYTES = 'b';

    /**
     * Writes an UTF8 encoded string.
     * @param {string} str String to write
     * @param {number=} offset Offset to write to. Will use and increase {@link ByteBuffer#offset} if omitted.
     * @returns {!ByteBuffer|number} this if offset is omitted, else the actual number of bytes written.
     * @expose
     */
    ByteBufferPrototype.writeUTF8String = function(str, offset) {
        var relative = typeof offset === 'undefined';
        if (relative) offset = this.offset;
        if (!this.noAssert) {
            if (typeof offset !== 'number' || offset % 1 !== 0)
                throw TypeError("Illegal offset: "+offset+" (not an integer)");
            offset >>>= 0;
            if (offset < 0 || offset + 0 > this.buffer.byteLength)
                throw RangeError("Illegal offset: 0 <= "+offset+" (+"+0+") <= "+this.buffer.byteLength);
        }
        var k;
        var start = offset;
        k = utfx.calculateUTF16asUTF8(stringSource(str))[1];
        offset += k;
        var capacity14 = this.buffer.byteLength;
        if (offset > capacity14)
            this.resize((capacity14 *= 2) > offset ? capacity14 : offset);
        offset -= k;
        utfx.encodeUTF16toUTF8(stringSource(str), function(b) {
            this.view[offset++] = b;
        }.bind(this));
        if (relative) {
            this.offset = offset;
            return this;
        }
        return offset - start;
    };

    /**
     * Writes an UTF8 encoded string. This is an alias of {@link ByteBuffer#writeUTF8String}.
     * @function
     * @param {string} str String to write
     * @param {number=} offset Offset to write to. Will use and increase {@link ByteBuffer#offset} if omitted.
     * @returns {!ByteBuffer|number} this if offset is omitted, else the actual number of bytes written.
     * @expose
     */
    ByteBufferPrototype.writeString = ByteBufferPrototype.writeUTF8String;

    /**
     * Calculates the number of UTF8 characters of a string. JavaScript itself uses UTF-16, so that a string's
     *  `length` property does not reflect its actual UTF8 size if it contains code points larger than 0xFFFF.
     * @param {string} str String to calculate
     * @returns {number} Number of UTF8 characters
     * @expose
     */
    ByteBuffer.calculateUTF8Chars = function(str) {
        return utfx.calculateUTF16asUTF8(stringSource(str))[0];
    };

    /**
     * Calculates the number of UTF8 bytes of a string.
     * @param {string} str String to calculate
     * @returns {number} Number of UTF8 bytes
     * @expose
     */
    ByteBuffer.calculateUTF8Bytes = function(str) {
        return utfx.calculateUTF16asUTF8(stringSource(str))[1];
    };

    /**
     * Calculates the number of UTF8 bytes of a string. This is an alias of {@link ByteBuffer.calculateUTF8Bytes}.
     * @function
     * @param {string} str String to calculate
     * @returns {number} Number of UTF8 bytes
     * @expose
     */
    ByteBuffer.calculateString = ByteBuffer.calculateUTF8Bytes;

    /**
     * Reads an UTF8 encoded string.
     * @param {number} length Number of characters or bytes to read.
     * @param {string=} metrics Metrics specifying what `length` is meant to count. Defaults to
     *  {@link ByteBuffer.METRICS_CHARS}.
     * @param {number=} offset Offset to read from. Will use and increase {@link ByteBuffer#offset} by the number of bytes
     *  read if omitted.
     * @returns {string|!{string: string, length: number}} The string read if offset is omitted, else the string
     *  read and the actual number of bytes read.
     * @expose
     */
    ByteBufferPrototype.readUTF8String = function(length, metrics, offset) {
        if (typeof metrics === 'number') {
            offset = metrics;
            metrics = undefined;
        }
        var relative = typeof offset === 'undefined';
        if (relative) offset = this.offset;
        if (typeof metrics === 'undefined') metrics = ByteBuffer.METRICS_CHARS;
        if (!this.noAssert) {
            if (typeof length !== 'number' || length % 1 !== 0)
                throw TypeError("Illegal length: "+length+" (not an integer)");
            length |= 0;
            if (typeof offset !== 'number' || offset % 1 !== 0)
                throw TypeError("Illegal offset: "+offset+" (not an integer)");
            offset >>>= 0;
            if (offset < 0 || offset + 0 > this.buffer.byteLength)
                throw RangeError("Illegal offset: 0 <= "+offset+" (+"+0+") <= "+this.buffer.byteLength);
        }
        var i = 0,
            start = offset,
            sd;
        if (metrics === ByteBuffer.METRICS_CHARS) { // The same for node and the browser
            sd = stringDestination();
            utfx.decodeUTF8(function() {
                return i < length && offset < this.limit ? this.view[offset++] : null;
            }.bind(this), function(cp) {
                ++i; utfx.UTF8toUTF16(cp, sd);
            });
            if (i !== length)
                throw RangeError("Illegal range: Truncated data, "+i+" == "+length);
            if (relative) {
                this.offset = offset;
                return sd();
            } else {
                return {
                    "string": sd(),
                    "length": offset - start
                };
            }
        } else if (metrics === ByteBuffer.METRICS_BYTES) {
            if (!this.noAssert) {
                if (typeof offset !== 'number' || offset % 1 !== 0)
                    throw TypeError("Illegal offset: "+offset+" (not an integer)");
                offset >>>= 0;
                if (offset < 0 || offset + length > this.buffer.byteLength)
                    throw RangeError("Illegal offset: 0 <= "+offset+" (+"+length+") <= "+this.buffer.byteLength);
            }
            var k = offset + length;
            utfx.decodeUTF8toUTF16(function() {
                return offset < k ? this.view[offset++] : null;
            }.bind(this), sd = stringDestination(), this.noAssert);
            if (offset !== k)
                throw RangeError("Illegal range: Truncated data, "+offset+" == "+k);
            if (relative) {
                this.offset = offset;
                return sd();
            } else {
                return {
                    'string': sd(),
                    'length': offset - start
                };
            }
        } else
            throw TypeError("Unsupported metrics: "+metrics);
    };

    /**
     * Reads an UTF8 encoded string. This is an alias of {@link ByteBuffer#readUTF8String}.
     * @function
     * @param {number} length Number of characters or bytes to read
     * @param {number=} metrics Metrics specifying what `n` is meant to count. Defaults to
     *  {@link ByteBuffer.METRICS_CHARS}.
     * @param {number=} offset Offset to read from. Will use and increase {@link ByteBuffer#offset} by the number of bytes
     *  read if omitted.
     * @returns {string|!{string: string, length: number}} The string read if offset is omitted, else the string
     *  read and the actual number of bytes read.
     * @expose
     */
    ByteBufferPrototype.readString = ByteBufferPrototype.readUTF8String;

    // types/strings/vstring

    /**
     * Writes a length as varint32 prefixed UTF8 encoded string.
     * @param {string} str String to write
     * @param {number=} offset Offset to write to. Will use and increase {@link ByteBuffer#offset} by the number of bytes
     *  written if omitted.
     * @returns {!ByteBuffer|number} `this` if `offset` is omitted, else the actual number of bytes written
     * @expose
     * @see ByteBuffer#writeVarint32
     */
    ByteBufferPrototype.writeVString = function(str, offset) {
        var relative = typeof offset === 'undefined';
        if (relative) offset = this.offset;
        if (!this.noAssert) {
            if (typeof str !== 'string')
                throw TypeError("Illegal str: Not a string");
            if (typeof offset !== 'number' || offset % 1 !== 0)
                throw TypeError("Illegal offset: "+offset+" (not an integer)");
            offset >>>= 0;
            if (offset < 0 || offset + 0 > this.buffer.byteLength)
                throw RangeError("Illegal offset: 0 <= "+offset+" (+"+0+") <= "+this.buffer.byteLength);
        }
        var start = offset,
            k, l;
        k = utfx.calculateUTF16asUTF8(stringSource(str), this.noAssert)[1];
        l = ByteBuffer.calculateVarint32(k);
        offset += l+k;
        var capacity15 = this.buffer.byteLength;
        if (offset > capacity15)
            this.resize((capacity15 *= 2) > offset ? capacity15 : offset);
        offset -= l+k;
        offset += this.writeVarint32(k, offset);
        utfx.encodeUTF16toUTF8(stringSource(str), function(b) {
            this.view[offset++] = b;
        }.bind(this));
        if (offset !== start+k+l)
            throw RangeError("Illegal range: Truncated data, "+offset+" == "+(offset+k+l));
        if (relative) {
            this.offset = offset;
            return this;
        }
        return offset - start;
    };

    /**
     * Reads a length as varint32 prefixed UTF8 encoded string.
     * @param {number=} offset Offset to read from. Will use and increase {@link ByteBuffer#offset} by the number of bytes
     *  read if omitted.
     * @returns {string|!{string: string, length: number}} The string read if offset is omitted, else the string
     *  read and the actual number of bytes read.
     * @expose
     * @see ByteBuffer#readVarint32
     */
    ByteBufferPrototype.readVString = function(offset) {
        var relative = typeof offset === 'undefined';
        if (relative) offset = this.offset;
        if (!this.noAssert) {
            if (typeof offset !== 'number' || offset % 1 !== 0)
                throw TypeError("Illegal offset: "+offset+" (not an integer)");
            offset >>>= 0;
            if (offset < 0 || offset + 1 > this.buffer.byteLength)
                throw RangeError("Illegal offset: 0 <= "+offset+" (+"+1+") <= "+this.buffer.byteLength);
        }
        var start = offset;
        var len = this.readVarint32(offset);
        var str = this.readUTF8String(len['value'], ByteBuffer.METRICS_BYTES, offset += len['length']);
        offset += str['length'];
        if (relative) {
            this.offset = offset;
            return str['string'];
        } else {
            return {
                'string': str['string'],
                'length': offset - start
            };
        }
    };


    /**
     * Appends some data to this ByteBuffer. This will overwrite any contents behind the specified offset up to the appended
     *  data's length.
     * @param {!ByteBuffer|!ArrayBuffer|!Uint8Array|string} source Data to append. If `source` is a ByteBuffer, its offsets
     *  will be modified according to the performed read operation.
     * @param {(string|number)=} encoding Encoding if `data` is a string ("base64", "hex", "binary", defaults to "utf8")
     * @param {number=} offset Offset to append at. Will use and increase {@link ByteBuffer#offset} by the number of bytes
     *  written if omitted.
     * @returns {!ByteBuffer} this
     * @expose
     * @example A relative `<01 02>03.append(<04 05>)` will result in `<01 02 04 05>, 04 05|`
     * @example An absolute `<01 02>03.append(04 05>, 1)` will result in `<01 04>05, 04 05|`
     */
    ByteBufferPrototype.append = function(source, encoding, offset) {
        if (typeof encoding === 'number' || typeof encoding !== 'string') {
            offset = encoding;
            encoding = undefined;
        }
        var relative = typeof offset === 'undefined';
        if (relative) offset = this.offset;
        if (!this.noAssert) {
            if (typeof offset !== 'number' || offset % 1 !== 0)
                throw TypeError("Illegal offset: "+offset+" (not an integer)");
            offset >>>= 0;
            if (offset < 0 || offset + 0 > this.buffer.byteLength)
                throw RangeError("Illegal offset: 0 <= "+offset+" (+"+0+") <= "+this.buffer.byteLength);
        }
        if (!(source instanceof ByteBuffer))
            source = ByteBuffer.wrap(source, encoding);
        var length = source.limit - source.offset;
        if (length <= 0) return this; // Nothing to append
        offset += length;
        var capacity16 = this.buffer.byteLength;
        if (offset > capacity16)
            this.resize((capacity16 *= 2) > offset ? capacity16 : offset);
        offset -= length;
        this.view.set(source.view.subarray(source.offset, source.limit), offset);
        source.offset += length;
        if (relative) this.offset += length;
        return this;
    };

    /**
     * Appends this ByteBuffer's contents to another ByteBuffer. This will overwrite any contents at and after the
        specified offset up to the length of this ByteBuffer's data.
     * @param {!ByteBuffer} target Target ByteBuffer
     * @param {number=} offset Offset to append to. Will use and increase {@link ByteBuffer#offset} by the number of bytes
     *  read if omitted.
     * @returns {!ByteBuffer} this
     * @expose
     * @see ByteBuffer#append
     */
    ByteBufferPrototype.appendTo = function(target, offset) {
        target.append(this, offset);
        return this;
    };

    /**
     * Enables or disables assertions of argument types and offsets. Assertions are enabled by default but you can opt to
     *  disable them if your code already makes sure that everything is valid.
     * @param {boolean} assert `true` to enable assertions, otherwise `false`
     * @returns {!ByteBuffer} this
     * @expose
     */
    ByteBufferPrototype.assert = function(assert) {
        this.noAssert = !assert;
        return this;
    };

    /**
     * Gets the capacity of this ByteBuffer's backing buffer.
     * @returns {number} Capacity of the backing buffer
     * @expose
     */
    ByteBufferPrototype.capacity = function() {
        return this.buffer.byteLength;
    };
    /**
     * Clears this ByteBuffer's offsets by setting {@link ByteBuffer#offset} to `0` and {@link ByteBuffer#limit} to the
     *  backing buffer's capacity. Discards {@link ByteBuffer#markedOffset}.
     * @returns {!ByteBuffer} this
     * @expose
     */
    ByteBufferPrototype.clear = function() {
        this.offset = 0;
        this.limit = this.buffer.byteLength;
        this.markedOffset = -1;
        return this;
    };

    /**
     * Creates a cloned instance of this ByteBuffer, preset with this ByteBuffer's values for {@link ByteBuffer#offset},
     *  {@link ByteBuffer#markedOffset} and {@link ByteBuffer#limit}.
     * @param {boolean=} copy Whether to copy the backing buffer or to return another view on the same, defaults to `false`
     * @returns {!ByteBuffer} Cloned instance
     * @expose
     */
    ByteBufferPrototype.clone = function(copy) {
        var bb = new ByteBuffer(0, this.littleEndian, this.noAssert);
        if (copy) {
            bb.buffer = new ArrayBuffer(this.buffer.byteLength);
            bb.view = new Uint8Array(bb.buffer);
        } else {
            bb.buffer = this.buffer;
            bb.view = this.view;
        }
        bb.offset = this.offset;
        bb.markedOffset = this.markedOffset;
        bb.limit = this.limit;
        return bb;
    };

    /**
     * Compacts this ByteBuffer to be backed by a {@link ByteBuffer#buffer} of its contents' length. Contents are the bytes
     *  between {@link ByteBuffer#offset} and {@link ByteBuffer#limit}. Will set `offset = 0` and `limit = capacity` and
     *  adapt {@link ByteBuffer#markedOffset} to the same relative position if set.
     * @param {number=} begin Offset to start at, defaults to {@link ByteBuffer#offset}
     * @param {number=} end Offset to end at, defaults to {@link ByteBuffer#limit}
     * @returns {!ByteBuffer} this
     * @expose
     */
    ByteBufferPrototype.compact = function(begin, end) {
        if (typeof begin === 'undefined') begin = this.offset;
        if (typeof end === 'undefined') end = this.limit;
        if (!this.noAssert) {
            if (typeof begin !== 'number' || begin % 1 !== 0)
                throw TypeError("Illegal begin: Not an integer");
            begin >>>= 0;
            if (typeof end !== 'number' || end % 1 !== 0)
                throw TypeError("Illegal end: Not an integer");
            end >>>= 0;
            if (begin < 0 || begin > end || end > this.buffer.byteLength)
                throw RangeError("Illegal range: 0 <= "+begin+" <= "+end+" <= "+this.buffer.byteLength);
        }
        if (begin === 0 && end === this.buffer.byteLength)
            return this; // Already compacted
        var len = end - begin;
        if (len === 0) {
            this.buffer = EMPTY_BUFFER;
            this.view = null;
            if (this.markedOffset >= 0) this.markedOffset -= begin;
            this.offset = 0;
            this.limit = 0;
            return this;
        }
        var buffer = new ArrayBuffer(len);
        var view = new Uint8Array(buffer);
        view.set(this.view.subarray(begin, end));
        this.buffer = buffer;
        this.view = view;
        if (this.markedOffset >= 0) this.markedOffset -= begin;
        this.offset = 0;
        this.limit = len;
        return this;
    };

    /**
     * Creates a copy of this ByteBuffer's contents. Contents are the bytes between {@link ByteBuffer#offset} and
     *  {@link ByteBuffer#limit}.
     * @param {number=} begin Begin offset, defaults to {@link ByteBuffer#offset}.
     * @param {number=} end End offset, defaults to {@link ByteBuffer#limit}.
     * @returns {!ByteBuffer} Copy
     * @expose
     */
    ByteBufferPrototype.copy = function(begin, end) {
        if (typeof begin === 'undefined') begin = this.offset;
        if (typeof end === 'undefined') end = this.limit;
        if (!this.noAssert) {
            if (typeof begin !== 'number' || begin % 1 !== 0)
                throw TypeError("Illegal begin: Not an integer");
            begin >>>= 0;
            if (typeof end !== 'number' || end % 1 !== 0)
                throw TypeError("Illegal end: Not an integer");
            end >>>= 0;
            if (begin < 0 || begin > end || end > this.buffer.byteLength)
                throw RangeError("Illegal range: 0 <= "+begin+" <= "+end+" <= "+this.buffer.byteLength);
        }
        if (begin === end)
            return new ByteBuffer(0, this.littleEndian, this.noAssert);
        var capacity = end - begin,
            bb = new ByteBuffer(capacity, this.littleEndian, this.noAssert);
        bb.offset = 0;
        bb.limit = capacity;
        if (bb.markedOffset >= 0) bb.markedOffset -= begin;
        this.copyTo(bb, 0, begin, end);
        return bb;
    };

    /**
     * Copies this ByteBuffer's contents to another ByteBuffer. Contents are the bytes between {@link ByteBuffer#offset} and
     *  {@link ByteBuffer#limit}.
     * @param {!ByteBuffer} target Target ByteBuffer
     * @param {number=} targetOffset Offset to copy to. Will use and increase the target's {@link ByteBuffer#offset}
     *  by the number of bytes copied if omitted.
     * @param {number=} sourceOffset Offset to start copying from. Will use and increase {@link ByteBuffer#offset} by the
     *  number of bytes copied if omitted.
     * @param {number=} sourceLimit Offset to end copying from, defaults to {@link ByteBuffer#limit}
     * @returns {!ByteBuffer} this
     * @expose
     */
    ByteBufferPrototype.copyTo = function(target, targetOffset, sourceOffset, sourceLimit) {
        var relative,
            targetRelative;
        if (!this.noAssert) {
            if (!ByteBuffer.isByteBuffer(target))
                throw TypeError("Illegal target: Not a ByteBuffer");
        }
        targetOffset = (targetRelative = typeof targetOffset === 'undefined') ? target.offset : targetOffset | 0;
        sourceOffset = (relative = typeof sourceOffset === 'undefined') ? this.offset : sourceOffset | 0;
        sourceLimit = typeof sourceLimit === 'undefined' ? this.limit : sourceLimit | 0;

        if (targetOffset < 0 || targetOffset > target.buffer.byteLength)
            throw RangeError("Illegal target range: 0 <= "+targetOffset+" <= "+target.buffer.byteLength);
        if (sourceOffset < 0 || sourceLimit > this.buffer.byteLength)
            throw RangeError("Illegal source range: 0 <= "+sourceOffset+" <= "+this.buffer.byteLength);

        var len = sourceLimit - sourceOffset;
        if (len === 0)
            return target; // Nothing to copy

        target.ensureCapacity(targetOffset + len);

        target.view.set(this.view.subarray(sourceOffset, sourceLimit), targetOffset);

        if (relative) this.offset += len;
        if (targetRelative) target.offset += len;

        return this;
    };

    /**
     * Makes sure that this ByteBuffer is backed by a {@link ByteBuffer#buffer} of at least the specified capacity. If the
     *  current capacity is exceeded, it will be doubled. If double the current capacity is less than the required capacity,
     *  the required capacity will be used instead.
     * @param {number} capacity Required capacity
     * @returns {!ByteBuffer} this
     * @expose
     */
    ByteBufferPrototype.ensureCapacity = function(capacity) {
        var current = this.buffer.byteLength;
        if (current < capacity)
            return this.resize((current *= 2) > capacity ? current : capacity);
        return this;
    };

    /**
     * Overwrites this ByteBuffer's contents with the specified value. Contents are the bytes between
     *  {@link ByteBuffer#offset} and {@link ByteBuffer#limit}.
     * @param {number|string} value Byte value to fill with. If given as a string, the first character is used.
     * @param {number=} begin Begin offset. Will use and increase {@link ByteBuffer#offset} by the number of bytes
     *  written if omitted. defaults to {@link ByteBuffer#offset}.
     * @param {number=} end End offset, defaults to {@link ByteBuffer#limit}.
     * @returns {!ByteBuffer} this
     * @expose
     * @example `someByteBuffer.clear().fill(0)` fills the entire backing buffer with zeroes
     */
    ByteBufferPrototype.fill = function(value, begin, end) {
        var relative = typeof begin === 'undefined';
        if (relative) begin = this.offset;
        if (typeof value === 'string' && value.length > 0)
            value = value.charCodeAt(0);
        if (typeof begin === 'undefined') begin = this.offset;
        if (typeof end === 'undefined') end = this.limit;
        if (!this.noAssert) {
            if (typeof value !== 'number' || value % 1 !== 0)
                throw TypeError("Illegal value: "+value+" (not an integer)");
            value |= 0;
            if (typeof begin !== 'number' || begin % 1 !== 0)
                throw TypeError("Illegal begin: Not an integer");
            begin >>>= 0;
            if (typeof end !== 'number' || end % 1 !== 0)
                throw TypeError("Illegal end: Not an integer");
            end >>>= 0;
            if (begin < 0 || begin > end || end > this.buffer.byteLength)
                throw RangeError("Illegal range: 0 <= "+begin+" <= "+end+" <= "+this.buffer.byteLength);
        }
        if (begin >= end)
            return this; // Nothing to fill
        while (begin < end) this.view[begin++] = value;
        if (relative) this.offset = begin;
        return this;
    };

    /**
     * Makes this ByteBuffer ready for a new sequence of write or relative read operations. Sets `limit = offset` and
     *  `offset = 0`. Make sure always to flip a ByteBuffer when all relative read or write operations are complete.
     * @returns {!ByteBuffer} this
     * @expose
     */
    ByteBufferPrototype.flip = function() {
        this.limit = this.offset;
        this.offset = 0;
        return this;
    };
    /**
     * Marks an offset on this ByteBuffer to be used later.
     * @param {number=} offset Offset to mark. Defaults to {@link ByteBuffer#offset}.
     * @returns {!ByteBuffer} this
     * @throws {TypeError} If `offset` is not a valid number
     * @throws {RangeError} If `offset` is out of bounds
     * @see ByteBuffer#reset
     * @expose
     */
    ByteBufferPrototype.mark = function(offset) {
        offset = typeof offset === 'undefined' ? this.offset : offset;
        if (!this.noAssert) {
            if (typeof offset !== 'number' || offset % 1 !== 0)
                throw TypeError("Illegal offset: "+offset+" (not an integer)");
            offset >>>= 0;
            if (offset < 0 || offset + 0 > this.buffer.byteLength)
                throw RangeError("Illegal offset: 0 <= "+offset+" (+"+0+") <= "+this.buffer.byteLength);
        }
        this.markedOffset = offset;
        return this;
    };
    /**
     * Sets the byte order.
     * @param {boolean} littleEndian `true` for little endian byte order, `false` for big endian
     * @returns {!ByteBuffer} this
     * @expose
     */
    ByteBufferPrototype.order = function(littleEndian) {
        if (!this.noAssert) {
            if (typeof littleEndian !== 'boolean')
                throw TypeError("Illegal littleEndian: Not a boolean");
        }
        this.littleEndian = !!littleEndian;
        return this;
    };

    /**
     * Switches (to) little endian byte order.
     * @param {boolean=} littleEndian Defaults to `true`, otherwise uses big endian
     * @returns {!ByteBuffer} this
     * @expose
     */
    ByteBufferPrototype.LE = function(littleEndian) {
        this.littleEndian = typeof littleEndian !== 'undefined' ? !!littleEndian : true;
        return this;
    };

    /**
     * Switches (to) big endian byte order.
     * @param {boolean=} bigEndian Defaults to `true`, otherwise uses little endian
     * @returns {!ByteBuffer} this
     * @expose
     */
    ByteBufferPrototype.BE = function(bigEndian) {
        this.littleEndian = typeof bigEndian !== 'undefined' ? !bigEndian : false;
        return this;
    };
    /**
     * Prepends some data to this ByteBuffer. This will overwrite any contents before the specified offset up to the
     *  prepended data's length. If there is not enough space available before the specified `offset`, the backing buffer
     *  will be resized and its contents moved accordingly.
     * @param {!ByteBuffer|string|!ArrayBuffer} source Data to prepend. If `source` is a ByteBuffer, its offset will be
     *  modified according to the performed read operation.
     * @param {(string|number)=} encoding Encoding if `data` is a string ("base64", "hex", "binary", defaults to "utf8")
     * @param {number=} offset Offset to prepend at. Will use and decrease {@link ByteBuffer#offset} by the number of bytes
     *  prepended if omitted.
     * @returns {!ByteBuffer} this
     * @expose
     * @example A relative `00<01 02 03>.prepend(<04 05>)` results in `<04 05 01 02 03>, 04 05|`
     * @example An absolute `00<01 02 03>.prepend(<04 05>, 2)` results in `04<05 02 03>, 04 05|`
     */
    ByteBufferPrototype.prepend = function(source, encoding, offset) {
        if (typeof encoding === 'number' || typeof encoding !== 'string') {
            offset = encoding;
            encoding = undefined;
        }
        var relative = typeof offset === 'undefined';
        if (relative) offset = this.offset;
        if (!this.noAssert) {
            if (typeof offset !== 'number' || offset % 1 !== 0)
                throw TypeError("Illegal offset: "+offset+" (not an integer)");
            offset >>>= 0;
            if (offset < 0 || offset + 0 > this.buffer.byteLength)
                throw RangeError("Illegal offset: 0 <= "+offset+" (+"+0+") <= "+this.buffer.byteLength);
        }
        if (!(source instanceof ByteBuffer))
            source = ByteBuffer.wrap(source, encoding);
        var len = source.limit - source.offset;
        if (len <= 0) return this; // Nothing to prepend
        var diff = len - offset;
        if (diff > 0) { // Not enough space before offset, so resize + move
            var buffer = new ArrayBuffer(this.buffer.byteLength + diff);
            var view = new Uint8Array(buffer);
            view.set(this.view.subarray(offset, this.buffer.byteLength), len);
            this.buffer = buffer;
            this.view = view;
            this.offset += diff;
            if (this.markedOffset >= 0) this.markedOffset += diff;
            this.limit += diff;
            offset += diff;
        } else {
            var arrayView = new Uint8Array(this.buffer);
        }
        this.view.set(source.view.subarray(source.offset, source.limit), offset - len);

        source.offset = source.limit;
        if (relative)
            this.offset -= len;
        return this;
    };

    /**
     * Prepends this ByteBuffer to another ByteBuffer. This will overwrite any contents before the specified offset up to the
     *  prepended data's length. If there is not enough space available before the specified `offset`, the backing buffer
     *  will be resized and its contents moved accordingly.
     * @param {!ByteBuffer} target Target ByteBuffer
     * @param {number=} offset Offset to prepend at. Will use and decrease {@link ByteBuffer#offset} by the number of bytes
     *  prepended if omitted.
     * @returns {!ByteBuffer} this
     * @expose
     * @see ByteBuffer#prepend
     */
    ByteBufferPrototype.prependTo = function(target, offset) {
        target.prepend(this, offset);
        return this;
    };
    /**
     * Prints debug information about this ByteBuffer's contents.
     * @param {function(string)=} out Output function to call, defaults to console.log
     * @expose
     */
    ByteBufferPrototype.printDebug = function(out) {
        if (typeof out !== 'function') out = console.log.bind(console);
        out(
            this.toString()+"\n"+
            "-------------------------------------------------------------------\n"+
            this.toDebug(/* columns */ true)
        );
    };

    /**
     * Gets the number of remaining readable bytes. Contents are the bytes between {@link ByteBuffer#offset} and
     *  {@link ByteBuffer#limit}, so this returns `limit - offset`.
     * @returns {number} Remaining readable bytes. May be negative if `offset > limit`.
     * @expose
     */
    ByteBufferPrototype.remaining = function() {
        return this.limit - this.offset;
    };
    /**
     * Resets this ByteBuffer's {@link ByteBuffer#offset}. If an offset has been marked through {@link ByteBuffer#mark}
     *  before, `offset` will be set to {@link ByteBuffer#markedOffset}, which will then be discarded. If no offset has been
     *  marked, sets `offset = 0`.
     * @returns {!ByteBuffer} this
     * @see ByteBuffer#mark
     * @expose
     */
    ByteBufferPrototype.reset = function() {
        if (this.markedOffset >= 0) {
            this.offset = this.markedOffset;
            this.markedOffset = -1;
        } else {
            this.offset = 0;
        }
        return this;
    };
    /**
     * Resizes this ByteBuffer to be backed by a buffer of at least the given capacity. Will do nothing if already that
     *  large or larger.
     * @param {number} capacity Capacity required
     * @returns {!ByteBuffer} this
     * @throws {TypeError} If `capacity` is not a number
     * @throws {RangeError} If `capacity < 0`
     * @expose
     */
    ByteBufferPrototype.resize = function(capacity) {
        if (!this.noAssert) {
            if (typeof capacity !== 'number' || capacity % 1 !== 0)
                throw TypeError("Illegal capacity: "+capacity+" (not an integer)");
            capacity |= 0;
            if (capacity < 0)
                throw RangeError("Illegal capacity: 0 <= "+capacity);
        }
        if (this.buffer.byteLength < capacity) {
            var buffer = new ArrayBuffer(capacity);
            var view = new Uint8Array(buffer);
            view.set(this.view);
            this.buffer = buffer;
            this.view = view;
        }
        return this;
    };
    /**
     * Reverses this ByteBuffer's contents.
     * @param {number=} begin Offset to start at, defaults to {@link ByteBuffer#offset}
     * @param {number=} end Offset to end at, defaults to {@link ByteBuffer#limit}
     * @returns {!ByteBuffer} this
     * @expose
     */
    ByteBufferPrototype.reverse = function(begin, end) {
        if (typeof begin === 'undefined') begin = this.offset;
        if (typeof end === 'undefined') end = this.limit;
        if (!this.noAssert) {
            if (typeof begin !== 'number' || begin % 1 !== 0)
                throw TypeError("Illegal begin: Not an integer");
            begin >>>= 0;
            if (typeof end !== 'number' || end % 1 !== 0)
                throw TypeError("Illegal end: Not an integer");
            end >>>= 0;
            if (begin < 0 || begin > end || end > this.buffer.byteLength)
                throw RangeError("Illegal range: 0 <= "+begin+" <= "+end+" <= "+this.buffer.byteLength);
        }
        if (begin === end)
            return this; // Nothing to reverse
        Array.prototype.reverse.call(this.view.subarray(begin, end));
        return this;
    };
    /**
     * Skips the next `length` bytes. This will just advance
     * @param {number} length Number of bytes to skip. May also be negative to move the offset back.
     * @returns {!ByteBuffer} this
     * @expose
     */
    ByteBufferPrototype.skip = function(length) {
        if (!this.noAssert) {
            if (typeof length !== 'number' || length % 1 !== 0)
                throw TypeError("Illegal length: "+length+" (not an integer)");
            length |= 0;
        }
        var offset = this.offset + length;
        if (!this.noAssert) {
            if (offset < 0 || offset > this.buffer.byteLength)
                throw RangeError("Illegal length: 0 <= "+this.offset+" + "+length+" <= "+this.buffer.byteLength);
        }
        this.offset = offset;
        return this;
    };

    /**
     * Slices this ByteBuffer by creating a cloned instance with `offset = begin` and `limit = end`.
     * @param {number=} begin Begin offset, defaults to {@link ByteBuffer#offset}.
     * @param {number=} end End offset, defaults to {@link ByteBuffer#limit}.
     * @returns {!ByteBuffer} Clone of this ByteBuffer with slicing applied, backed by the same {@link ByteBuffer#buffer}
     * @expose
     */
    ByteBufferPrototype.slice = function(begin, end) {
        if (typeof begin === 'undefined') begin = this.offset;
        if (typeof end === 'undefined') end = this.limit;
        if (!this.noAssert) {
            if (typeof begin !== 'number' || begin % 1 !== 0)
                throw TypeError("Illegal begin: Not an integer");
            begin >>>= 0;
            if (typeof end !== 'number' || end % 1 !== 0)
                throw TypeError("Illegal end: Not an integer");
            end >>>= 0;
            if (begin < 0 || begin > end || end > this.buffer.byteLength)
                throw RangeError("Illegal range: 0 <= "+begin+" <= "+end+" <= "+this.buffer.byteLength);
        }
        var bb = this.clone();
        bb.offset = begin;
        bb.limit = end;
        return bb;
    };
    /**
     * Returns a copy of the backing buffer that contains this ByteBuffer's contents. Contents are the bytes between
     *  {@link ByteBuffer#offset} and {@link ByteBuffer#limit}.
     * @param {boolean=} forceCopy If `true` returns a copy, otherwise returns a view referencing the same memory if
     *  possible. Defaults to `false`
     * @returns {!ArrayBuffer} Contents as an ArrayBuffer
     * @expose
     */
    ByteBufferPrototype.toBuffer = function(forceCopy) {
        var offset = this.offset,
            limit = this.limit;
        if (!this.noAssert) {
            if (typeof offset !== 'number' || offset % 1 !== 0)
                throw TypeError("Illegal offset: Not an integer");
            offset >>>= 0;
            if (typeof limit !== 'number' || limit % 1 !== 0)
                throw TypeError("Illegal limit: Not an integer");
            limit >>>= 0;
            if (offset < 0 || offset > limit || limit > this.buffer.byteLength)
                throw RangeError("Illegal range: 0 <= "+offset+" <= "+limit+" <= "+this.buffer.byteLength);
        }
        // NOTE: It's not possible to have another ArrayBuffer reference the same memory as the backing buffer. This is
        // possible with Uint8Array#subarray only, but we have to return an ArrayBuffer by contract. So:
        if (!forceCopy && offset === 0 && limit === this.buffer.byteLength)
            return this.buffer;
        if (offset === limit)
            return EMPTY_BUFFER;
        var buffer = new ArrayBuffer(limit - offset);
        new Uint8Array(buffer).set(new Uint8Array(this.buffer).subarray(offset, limit), 0);
        return buffer;
    };

    /**
     * Returns a raw buffer compacted to contain this ByteBuffer's contents. Contents are the bytes between
     *  {@link ByteBuffer#offset} and {@link ByteBuffer#limit}. This is an alias of {@link ByteBuffer#toBuffer}.
     * @function
     * @param {boolean=} forceCopy If `true` returns a copy, otherwise returns a view referencing the same memory.
     *  Defaults to `false`
     * @returns {!ArrayBuffer} Contents as an ArrayBuffer
     * @expose
     */
    ByteBufferPrototype.toArrayBuffer = ByteBufferPrototype.toBuffer;

    /**
     * Converts the ByteBuffer's contents to a string.
     * @param {string=} encoding Output encoding. Returns an informative string representation if omitted but also allows
     *  direct conversion to "utf8", "hex", "base64" and "binary" encoding. "debug" returns a hex representation with
     *  highlighted offsets.
     * @param {number=} begin Offset to begin at, defaults to {@link ByteBuffer#offset}
     * @param {number=} end Offset to end at, defaults to {@link ByteBuffer#limit}
     * @returns {string} String representation
     * @throws {Error} If `encoding` is invalid
     * @expose
     */
    ByteBufferPrototype.toString = function(encoding, begin, end) {
        if (typeof encoding === 'undefined')
            return "ByteBufferAB(offset="+this.offset+",markedOffset="+this.markedOffset+",limit="+this.limit+",capacity="+this.capacity()+")";
        if (typeof encoding === 'number')
            encoding = "utf8",
            begin = encoding,
            end = begin;
        switch (encoding) {
            case "utf8":
                return this.toUTF8(begin, end);
            case "base64":
                return this.toBase64(begin, end);
            case "hex":
                return this.toHex(begin, end);
            case "binary":
                return this.toBinary(begin, end);
            case "debug":
                return this.toDebug();
            case "columns":
                return this.toColumns();
            default:
                throw Error("Unsupported encoding: "+encoding);
        }
    };

    // lxiv-embeddable

    /**
     * lxiv-embeddable (c) 2014 Daniel Wirtz <dcode@dcode.io>
     * Released under the Apache License, Version 2.0
     * see: https://github.com/dcodeIO/lxiv for details
     */
    var lxiv = function() {
        "use strict";

        /**
         * lxiv namespace.
         * @type {!Object.<string,*>}
         * @exports lxiv
         */
        var lxiv = {};

        /**
         * Character codes for output.
         * @type {!Array.<number>}
         * @inner
         */
        var aout = [
            65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80,
            81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 97, 98, 99, 100, 101, 102,
            103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118,
            119, 120, 121, 122, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 43, 47
        ];

        /**
         * Character codes for input.
         * @type {!Array.<number>}
         * @inner
         */
        var ain = [];
        for (var i=0, k=aout.length; i<k; ++i)
            ain[aout[i]] = i;

        /**
         * Encodes bytes to base64 char codes.
         * @param {!function():number|null} src Bytes source as a function returning the next byte respectively `null` if
         *  there are no more bytes left.
         * @param {!function(number)} dst Characters destination as a function successively called with each encoded char
         *  code.
         */
        lxiv.encode = function(src, dst) {
            var b, t;
            while ((b = src()) !== null) {
                dst(aout[(b>>2)&0x3f]);
                t = (b&0x3)<<4;
                if ((b = src()) !== null) {
                    t |= (b>>4)&0xf;
                    dst(aout[(t|((b>>4)&0xf))&0x3f]);
                    t = (b&0xf)<<2;
                    if ((b = src()) !== null)
                        dst(aout[(t|((b>>6)&0x3))&0x3f]),
                        dst(aout[b&0x3f]);
                    else
                        dst(aout[t&0x3f]),
                        dst(61);
                } else
                    dst(aout[t&0x3f]),
                    dst(61),
                    dst(61);
            }
        };

        /**
         * Decodes base64 char codes to bytes.
         * @param {!function():number|null} src Characters source as a function returning the next char code respectively
         *  `null` if there are no more characters left.
         * @param {!function(number)} dst Bytes destination as a function successively called with the next byte.
         * @throws {Error} If a character code is invalid
         */
        lxiv.decode = function(src, dst) {
            var c, t1, t2;
            function fail(c) {
                throw Error("Illegal character code: "+c);
            }
            while ((c = src()) !== null) {
                t1 = ain[c];
                if (typeof t1 === 'undefined') fail(c);
                if ((c = src()) !== null) {
                    t2 = ain[c];
                    if (typeof t2 === 'undefined') fail(c);
                    dst((t1<<2)>>>0|(t2&0x30)>>4);
                    if ((c = src()) !== null) {
                        t1 = ain[c];
                        if (typeof t1 === 'undefined')
                            if (c === 61) break; else fail(c);
                        dst(((t2&0xf)<<4)>>>0|(t1&0x3c)>>2);
                        if ((c = src()) !== null) {
                            t2 = ain[c];
                            if (typeof t2 === 'undefined')
                                if (c === 61) break; else fail(c);
                            dst(((t1&0x3)<<6)>>>0|t2);
                        }
                    }
                }
            }
        };

        /**
         * Tests if a string is valid base64.
         * @param {string} str String to test
         * @returns {boolean} `true` if valid, otherwise `false`
         */
        lxiv.test = function(str) {
            return /^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=)?$/.test(str);
        };

        return lxiv;
    }();

    // encodings/base64

    /**
     * Encodes this ByteBuffer's contents to a base64 encoded string.
     * @param {number=} begin Offset to begin at, defaults to {@link ByteBuffer#offset}.
     * @param {number=} end Offset to end at, defaults to {@link ByteBuffer#limit}.
     * @returns {string} Base64 encoded string
     * @throws {RangeError} If `begin` or `end` is out of bounds
     * @expose
     */
    ByteBufferPrototype.toBase64 = function(begin, end) {
        if (typeof begin === 'undefined')
            begin = this.offset;
        if (typeof end === 'undefined')
            end = this.limit;
        begin = begin | 0; end = end | 0;
        if (begin < 0 || end > this.capacity || begin > end)
            throw RangeError("begin, end");
        var sd; lxiv.encode(function() {
            return begin < end ? this.view[begin++] : null;
        }.bind(this), sd = stringDestination());
        return sd();
    };

    /**
     * Decodes a base64 encoded string to a ByteBuffer.
     * @param {string} str String to decode
     * @param {boolean=} littleEndian Whether to use little or big endian byte order. Defaults to
     *  {@link ByteBuffer.DEFAULT_ENDIAN}.
     * @returns {!ByteBuffer} ByteBuffer
     * @expose
     */
    ByteBuffer.fromBase64 = function(str, littleEndian) {
        if (typeof str !== 'string')
            throw TypeError("str");
        var bb = new ByteBuffer(str.length/4*3, littleEndian),
            i = 0;
        lxiv.decode(stringSource(str), function(b) {
            bb.view[i++] = b;
        });
        bb.limit = i;
        return bb;
    };

    /**
     * Encodes a binary string to base64 like `window.btoa` does.
     * @param {string} str Binary string
     * @returns {string} Base64 encoded string
     * @see https://developer.mozilla.org/en-US/docs/Web/API/Window.btoa
     * @expose
     */
    ByteBuffer.btoa = function(str) {
        return ByteBuffer.fromBinary(str).toBase64();
    };

    /**
     * Decodes a base64 encoded string to binary like `window.atob` does.
     * @param {string} b64 Base64 encoded string
     * @returns {string} Binary string
     * @see https://developer.mozilla.org/en-US/docs/Web/API/Window.atob
     * @expose
     */
    ByteBuffer.atob = function(b64) {
        return ByteBuffer.fromBase64(b64).toBinary();
    };

    // encodings/binary

    /**
     * Encodes this ByteBuffer to a binary encoded string, that is using only characters 0x00-0xFF as bytes.
     * @param {number=} begin Offset to begin at. Defaults to {@link ByteBuffer#offset}.
     * @param {number=} end Offset to end at. Defaults to {@link ByteBuffer#limit}.
     * @returns {string} Binary encoded string
     * @throws {RangeError} If `offset > limit`
     * @expose
     */
    ByteBufferPrototype.toBinary = function(begin, end) {
        if (typeof begin === 'undefined')
            begin = this.offset;
        if (typeof end === 'undefined')
            end = this.limit;
        begin |= 0; end |= 0;
        if (begin < 0 || end > this.capacity() || begin > end)
            throw RangeError("begin, end");
        if (begin === end)
            return "";
        var chars = [],
            parts = [];
        while (begin < end) {
            chars.push(this.view[begin++]);
            if (chars.length >= 1024)
                parts.push(String.fromCharCode.apply(String, chars)),
                chars = [];
        }
        return parts.join('') + String.fromCharCode.apply(String, chars);
    };

    /**
     * Decodes a binary encoded string, that is using only characters 0x00-0xFF as bytes, to a ByteBuffer.
     * @param {string} str String to decode
     * @param {boolean=} littleEndian Whether to use little or big endian byte order. Defaults to
     *  {@link ByteBuffer.DEFAULT_ENDIAN}.
     * @returns {!ByteBuffer} ByteBuffer
     * @expose
     */
    ByteBuffer.fromBinary = function(str, littleEndian) {
        if (typeof str !== 'string')
            throw TypeError("str");
        var i = 0,
            k = str.length,
            charCode,
            bb = new ByteBuffer(k, littleEndian);
        while (i<k) {
            charCode = str.charCodeAt(i);
            if (charCode > 0xff)
                throw RangeError("illegal char code: "+charCode);
            bb.view[i++] = charCode;
        }
        bb.limit = k;
        return bb;
    };

    // encodings/debug

    /**
     * Encodes this ByteBuffer to a hex encoded string with marked offsets. Offset symbols are:
     * * `<` : offset,
     * * `'` : markedOffset,
     * * `>` : limit,
     * * `|` : offset and limit,
     * * `[` : offset and markedOffset,
     * * `]` : markedOffset and limit,
     * * `!` : offset, markedOffset and limit
     * @param {boolean=} columns If `true` returns two columns hex + ascii, defaults to `false`
     * @returns {string|!Array.<string>} Debug string or array of lines if `asArray = true`
     * @expose
     * @example `>00'01 02<03` contains four bytes with `limit=0, markedOffset=1, offset=3`
     * @example `00[01 02 03>` contains four bytes with `offset=markedOffset=1, limit=4`
     * @example `00|01 02 03` contains four bytes with `offset=limit=1, markedOffset=-1`
     * @example `|` contains zero bytes with `offset=limit=0, markedOffset=-1`
     */
    ByteBufferPrototype.toDebug = function(columns) {
        var i = -1,
            k = this.buffer.byteLength,
            b,
            hex = "",
            asc = "",
            out = "";
        while (i<k) {
            if (i !== -1) {
                b = this.view[i];
                if (b < 0x10) hex += "0"+b.toString(16).toUpperCase();
                else hex += b.toString(16).toUpperCase();
                if (columns)
                    asc += b > 32 && b < 127 ? String.fromCharCode(b) : '.';
            }
            ++i;
            if (columns) {
                if (i > 0 && i % 16 === 0 && i !== k) {
                    while (hex.length < 3*16+3) hex += " ";
                    out += hex+asc+"\n";
                    hex = asc = "";
                }
            }
            if (i === this.offset && i === this.limit)
                hex += i === this.markedOffset ? "!" : "|";
            else if (i === this.offset)
                hex += i === this.markedOffset ? "[" : "<";
            else if (i === this.limit)
                hex += i === this.markedOffset ? "]" : ">";
            else
                hex += i === this.markedOffset ? "'" : (columns || (i !== 0 && i !== k) ? " " : "");
        }
        if (columns && hex !== " ") {
            while (hex.length < 3*16+3)
                hex += " ";
            out += hex + asc + "\n";
        }
        return columns ? out : hex;
    };

    /**
     * Decodes a hex encoded string with marked offsets to a ByteBuffer.
     * @param {string} str Debug string to decode (not be generated with `columns = true`)
     * @param {boolean=} littleEndian Whether to use little or big endian byte order. Defaults to
     *  {@link ByteBuffer.DEFAULT_ENDIAN}.
     * @param {boolean=} noAssert Whether to skip assertions of offsets and values. Defaults to
     *  {@link ByteBuffer.DEFAULT_NOASSERT}.
     * @returns {!ByteBuffer} ByteBuffer
     * @expose
     * @see ByteBuffer#toDebug
     */
    ByteBuffer.fromDebug = function(str, littleEndian, noAssert) {
        var k = str.length,
            bb = new ByteBuffer(((k+1)/3)|0, littleEndian, noAssert);
        var i = 0, j = 0, ch, b,
            rs = false, // Require symbol next
            ho = false, hm = false, hl = false, // Already has offset (ho), markedOffset (hm), limit (hl)?
            fail = false;
        while (i<k) {
            switch (ch = str.charAt(i++)) {
                case '!':
                    if (!noAssert) {
                        if (ho || hm || hl) {
                            fail = true;
                            break;
                        }
                        ho = hm = hl = true;
                    }
                    bb.offset = bb.markedOffset = bb.limit = j;
                    rs = false;
                    break;
                case '|':
                    if (!noAssert) {
                        if (ho || hl) {
                            fail = true;
                            break;
                        }
                        ho = hl = true;
                    }
                    bb.offset = bb.limit = j;
                    rs = false;
                    break;
                case '[':
                    if (!noAssert) {
                        if (ho || hm) {
                            fail = true;
                            break;
                        }
                        ho = hm = true;
                    }
                    bb.offset = bb.markedOffset = j;
                    rs = false;
                    break;
                case '<':
                    if (!noAssert) {
                        if (ho) {
                            fail = true;
                            break;
                        }
                        ho = true;
                    }
                    bb.offset = j;
                    rs = false;
                    break;
                case ']':
                    if (!noAssert) {
                        if (hl || hm) {
                            fail = true;
                            break;
                        }
                        hl = hm = true;
                    }
                    bb.limit = bb.markedOffset = j;
                    rs = false;
                    break;
                case '>':
                    if (!noAssert) {
                        if (hl) {
                            fail = true;
                            break;
                        }
                        hl = true;
                    }
                    bb.limit = j;
                    rs = false;
                    break;
                case "'":
                    if (!noAssert) {
                        if (hm) {
                            fail = true;
                            break;
                        }
                        hm = true;
                    }
                    bb.markedOffset = j;
                    rs = false;
                    break;
                case ' ':
                    rs = false;
                    break;
                default:
                    if (!noAssert) {
                        if (rs) {
                            fail = true;
                            break;
                        }
                    }
                    b = parseInt(ch+str.charAt(i++), 16);
                    if (!noAssert) {
                        if (isNaN(b) || b < 0 || b > 255)
                            throw TypeError("Illegal str: Not a debug encoded string");
                    }
                    bb.view[j++] = b;
                    rs = true;
            }
            if (fail)
                throw TypeError("Illegal str: Invalid symbol at "+i);
        }
        if (!noAssert) {
            if (!ho || !hl)
                throw TypeError("Illegal str: Missing offset or limit");
            if (j<bb.buffer.byteLength)
                throw TypeError("Illegal str: Not a debug encoded string (is it hex?) "+j+" < "+k);
        }
        return bb;
    };

    // encodings/hex

    /**
     * Encodes this ByteBuffer's contents to a hex encoded string.
     * @param {number=} begin Offset to begin at. Defaults to {@link ByteBuffer#offset}.
     * @param {number=} end Offset to end at. Defaults to {@link ByteBuffer#limit}.
     * @returns {string} Hex encoded string
     * @expose
     */
    ByteBufferPrototype.toHex = function(begin, end) {
        begin = typeof begin === 'undefined' ? this.offset : begin;
        end = typeof end === 'undefined' ? this.limit : end;
        if (!this.noAssert) {
            if (typeof begin !== 'number' || begin % 1 !== 0)
                throw TypeError("Illegal begin: Not an integer");
            begin >>>= 0;
            if (typeof end !== 'number' || end % 1 !== 0)
                throw TypeError("Illegal end: Not an integer");
            end >>>= 0;
            if (begin < 0 || begin > end || end > this.buffer.byteLength)
                throw RangeError("Illegal range: 0 <= "+begin+" <= "+end+" <= "+this.buffer.byteLength);
        }
        var out = new Array(end - begin),
            b;
        while (begin < end) {
            b = this.view[begin++];
            if (b < 0x10)
                out.push("0", b.toString(16));
            else out.push(b.toString(16));
        }
        return out.join('');
    };

    /**
     * Decodes a hex encoded string to a ByteBuffer.
     * @param {string} str String to decode
     * @param {boolean=} littleEndian Whether to use little or big endian byte order. Defaults to
     *  {@link ByteBuffer.DEFAULT_ENDIAN}.
     * @param {boolean=} noAssert Whether to skip assertions of offsets and values. Defaults to
     *  {@link ByteBuffer.DEFAULT_NOASSERT}.
     * @returns {!ByteBuffer} ByteBuffer
     * @expose
     */
    ByteBuffer.fromHex = function(str, littleEndian, noAssert) {
        if (!noAssert) {
            if (typeof str !== 'string')
                throw TypeError("Illegal str: Not a string");
            if (str.length % 2 !== 0)
                throw TypeError("Illegal str: Length not a multiple of 2");
        }
        var k = str.length,
            bb = new ByteBuffer((k / 2) | 0, littleEndian),
            b;
        for (var i=0, j=0; i<k; i+=2) {
            b = parseInt(str.substring(i, i+2), 16);
            if (!noAssert)
                if (!isFinite(b) || b < 0 || b > 255)
                    throw TypeError("Illegal str: Contains non-hex characters");
            bb.view[j++] = b;
        }
        bb.limit = j;
        return bb;
    };

    // utfx-embeddable

    /**
     * utfx-embeddable (c) 2014 Daniel Wirtz <dcode@dcode.io>
     * Released under the Apache License, Version 2.0
     * see: https://github.com/dcodeIO/utfx for details
     */
    var utfx = function() {
        "use strict";

        /**
         * utfx namespace.
         * @inner
         * @type {!Object.<string,*>}
         */
        var utfx = {};

        /**
         * Maximum valid code point.
         * @type {number}
         * @const
         */
        utfx.MAX_CODEPOINT = 0x10FFFF;

        /**
         * Encodes UTF8 code points to UTF8 bytes.
         * @param {(!function():number|null) | number} src Code points source, either as a function returning the next code point
         *  respectively `null` if there are no more code points left or a single numeric code point.
         * @param {!function(number)} dst Bytes destination as a function successively called with the next byte
         */
        utfx.encodeUTF8 = function(src, dst) {
            var cp = null;
            if (typeof src === 'number')
                cp = src,
                src = function() { return null; };
            while (cp !== null || (cp = src()) !== null) {
                if (cp < 0x80)
                    dst(cp&0x7F);
                else if (cp < 0x800)
                    dst(((cp>>6)&0x1F)|0xC0),
                    dst((cp&0x3F)|0x80);
                else if (cp < 0x10000)
                    dst(((cp>>12)&0x0F)|0xE0),
                    dst(((cp>>6)&0x3F)|0x80),
                    dst((cp&0x3F)|0x80);
                else
                    dst(((cp>>18)&0x07)|0xF0),
                    dst(((cp>>12)&0x3F)|0x80),
                    dst(((cp>>6)&0x3F)|0x80),
                    dst((cp&0x3F)|0x80);
                cp = null;
            }
        };

        /**
         * Decodes UTF8 bytes to UTF8 code points.
         * @param {!function():number|null} src Bytes source as a function returning the next byte respectively `null` if there
         *  are no more bytes left.
         * @param {!function(number)} dst Code points destination as a function successively called with each decoded code point.
         * @throws {RangeError} If a starting byte is invalid in UTF8
         * @throws {Error} If the last sequence is truncated. Has an array property `bytes` holding the
         *  remaining bytes.
         */
        utfx.decodeUTF8 = function(src, dst) {
            var a, b, c, d, fail = function(b) {
                b = b.slice(0, b.indexOf(null));
                var err = Error(b.toString());
                err.name = "TruncatedError";
                err['bytes'] = b;
                throw err;
            };
            while ((a = src()) !== null) {
                if ((a&0x80) === 0)
                    dst(a);
                else if ((a&0xE0) === 0xC0)
                    ((b = src()) === null) && fail([a, b]),
                    dst(((a&0x1F)<<6) | (b&0x3F));
                else if ((a&0xF0) === 0xE0)
                    ((b=src()) === null || (c=src()) === null) && fail([a, b, c]),
                    dst(((a&0x0F)<<12) | ((b&0x3F)<<6) | (c&0x3F));
                else if ((a&0xF8) === 0xF0)
                    ((b=src()) === null || (c=src()) === null || (d=src()) === null) && fail([a, b, c ,d]),
                    dst(((a&0x07)<<18) | ((b&0x3F)<<12) | ((c&0x3F)<<6) | (d&0x3F));
                else throw RangeError("Illegal starting byte: "+a);
            }
        };

        /**
         * Converts UTF16 characters to UTF8 code points.
         * @param {!function():number|null} src Characters source as a function returning the next char code respectively
         *  `null` if there are no more characters left.
         * @param {!function(number)} dst Code points destination as a function successively called with each converted code
         *  point.
         */
        utfx.UTF16toUTF8 = function(src, dst) {
            var c1, c2 = null;
            while (true) {
                if ((c1 = c2 !== null ? c2 : src()) === null)
                    break;
                if (c1 >= 0xD800 && c1 <= 0xDFFF) {
                    if ((c2 = src()) !== null) {
                        if (c2 >= 0xDC00 && c2 <= 0xDFFF) {
                            dst((c1-0xD800)*0x400+c2-0xDC00+0x10000);
                            c2 = null; continue;
                        }
                    }
                }
                dst(c1);
            }
            if (c2 !== null) dst(c2);
        };

        /**
         * Converts UTF8 code points to UTF16 characters.
         * @param {(!function():number|null) | number} src Code points source, either as a function returning the next code point
         *  respectively `null` if there are no more code points left or a single numeric code point.
         * @param {!function(number)} dst Characters destination as a function successively called with each converted char code.
         * @throws {RangeError} If a code point is out of range
         */
        utfx.UTF8toUTF16 = function(src, dst) {
            var cp = null;
            if (typeof src === 'number')
                cp = src, src = function() { return null; };
            while (cp !== null || (cp = src()) !== null) {
                if (cp <= 0xFFFF)
                    dst(cp);
                else
                    cp -= 0x10000,
                    dst((cp>>10)+0xD800),
                    dst((cp%0x400)+0xDC00);
                cp = null;
            }
        };

        /**
         * Converts and encodes UTF16 characters to UTF8 bytes.
         * @param {!function():number|null} src Characters source as a function returning the next char code respectively `null`
         *  if there are no more characters left.
         * @param {!function(number)} dst Bytes destination as a function successively called with the next byte.
         */
        utfx.encodeUTF16toUTF8 = function(src, dst) {
            utfx.UTF16toUTF8(src, function(cp) {
                utfx.encodeUTF8(cp, dst);
            });
        };

        /**
         * Decodes and converts UTF8 bytes to UTF16 characters.
         * @param {!function():number|null} src Bytes source as a function returning the next byte respectively `null` if there
         *  are no more bytes left.
         * @param {!function(number)} dst Characters destination as a function successively called with each converted char code.
         * @throws {RangeError} If a starting byte is invalid in UTF8
         * @throws {Error} If the last sequence is truncated. Has an array property `bytes` holding the remaining bytes.
         */
        utfx.decodeUTF8toUTF16 = function(src, dst) {
            utfx.decodeUTF8(src, function(cp) {
                utfx.UTF8toUTF16(cp, dst);
            });
        };

        /**
         * Calculates the byte length of an UTF8 code point.
         * @param {number} cp UTF8 code point
         * @returns {number} Byte length
         */
        utfx.calculateCodePoint = function(cp) {
            return (cp < 0x80) ? 1 : (cp < 0x800) ? 2 : (cp < 0x10000) ? 3 : 4;
        };

        /**
         * Calculates the number of UTF8 bytes required to store UTF8 code points.
         * @param {(!function():number|null)} src Code points source as a function returning the next code point respectively
         *  `null` if there are no more code points left.
         * @returns {number} The number of UTF8 bytes required
         */
        utfx.calculateUTF8 = function(src) {
            var cp, l=0;
            while ((cp = src()) !== null)
                l += (cp < 0x80) ? 1 : (cp < 0x800) ? 2 : (cp < 0x10000) ? 3 : 4;
            return l;
        };

        /**
         * Calculates the number of UTF8 code points respectively UTF8 bytes required to store UTF16 char codes.
         * @param {(!function():number|null)} src Characters source as a function returning the next char code respectively
         *  `null` if there are no more characters left.
         * @returns {!Array.<number>} The number of UTF8 code points at index 0 and the number of UTF8 bytes required at index 1.
         */
        utfx.calculateUTF16asUTF8 = function(src) {
            var n=0, l=0;
            utfx.UTF16toUTF8(src, function(cp) {
                ++n; l += (cp < 0x80) ? 1 : (cp < 0x800) ? 2 : (cp < 0x10000) ? 3 : 4;
            });
            return [n,l];
        };

        return utfx;
    }();

    // encodings/utf8

    /**
     * Encodes this ByteBuffer's contents between {@link ByteBuffer#offset} and {@link ByteBuffer#limit} to an UTF8 encoded
     *  string.
     * @returns {string} Hex encoded string
     * @throws {RangeError} If `offset > limit`
     * @expose
     */
    ByteBufferPrototype.toUTF8 = function(begin, end) {
        if (typeof begin === 'undefined') begin = this.offset;
        if (typeof end === 'undefined') end = this.limit;
        if (!this.noAssert) {
            if (typeof begin !== 'number' || begin % 1 !== 0)
                throw TypeError("Illegal begin: Not an integer");
            begin >>>= 0;
            if (typeof end !== 'number' || end % 1 !== 0)
                throw TypeError("Illegal end: Not an integer");
            end >>>= 0;
            if (begin < 0 || begin > end || end > this.buffer.byteLength)
                throw RangeError("Illegal range: 0 <= "+begin+" <= "+end+" <= "+this.buffer.byteLength);
        }
        var sd; try {
            utfx.decodeUTF8toUTF16(function() {
                return begin < end ? this.view[begin++] : null;
            }.bind(this), sd = stringDestination());
        } catch (e) {
            if (begin !== end)
                throw RangeError("Illegal range: Truncated data, "+begin+" != "+end);
        }
        return sd();
    };

    /**
     * Decodes an UTF8 encoded string to a ByteBuffer.
     * @param {string} str String to decode
     * @param {boolean=} littleEndian Whether to use little or big endian byte order. Defaults to
     *  {@link ByteBuffer.DEFAULT_ENDIAN}.
     * @param {boolean=} noAssert Whether to skip assertions of offsets and values. Defaults to
     *  {@link ByteBuffer.DEFAULT_NOASSERT}.
     * @returns {!ByteBuffer} ByteBuffer
     * @expose
     */
    ByteBuffer.fromUTF8 = function(str, littleEndian, noAssert) {
        if (!noAssert)
            if (typeof str !== 'string')
                throw TypeError("Illegal str: Not a string");
        var bb = new ByteBuffer(utfx.calculateUTF16asUTF8(stringSource(str), true)[1], littleEndian, noAssert),
            i = 0;
        utfx.encodeUTF16toUTF8(stringSource(str), function(b) {
            bb.view[i++] = b;
        });
        bb.limit = i;
        return bb;
    };

    return ByteBuffer;
});

},{"long":34}],26:[function(require,module,exports){
(function (Buffer){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

// NOTE: These type checking functions intentionally don't use `instanceof`
// because it is fragile and can be easily faked with `Object.create()`.

function isArray(arg) {
  if (Array.isArray) {
    return Array.isArray(arg);
  }
  return objectToString(arg) === '[object Array]';
}
exports.isArray = isArray;

function isBoolean(arg) {
  return typeof arg === 'boolean';
}
exports.isBoolean = isBoolean;

function isNull(arg) {
  return arg === null;
}
exports.isNull = isNull;

function isNullOrUndefined(arg) {
  return arg == null;
}
exports.isNullOrUndefined = isNullOrUndefined;

function isNumber(arg) {
  return typeof arg === 'number';
}
exports.isNumber = isNumber;

function isString(arg) {
  return typeof arg === 'string';
}
exports.isString = isString;

function isSymbol(arg) {
  return typeof arg === 'symbol';
}
exports.isSymbol = isSymbol;

function isUndefined(arg) {
  return arg === void 0;
}
exports.isUndefined = isUndefined;

function isRegExp(re) {
  return objectToString(re) === '[object RegExp]';
}
exports.isRegExp = isRegExp;

function isObject(arg) {
  return typeof arg === 'object' && arg !== null;
}
exports.isObject = isObject;

function isDate(d) {
  return objectToString(d) === '[object Date]';
}
exports.isDate = isDate;

function isError(e) {
  return (objectToString(e) === '[object Error]' || e instanceof Error);
}
exports.isError = isError;

function isFunction(arg) {
  return typeof arg === 'function';
}
exports.isFunction = isFunction;

function isPrimitive(arg) {
  return arg === null ||
         typeof arg === 'boolean' ||
         typeof arg === 'number' ||
         typeof arg === 'string' ||
         typeof arg === 'symbol' ||  // ES6 symbol
         typeof arg === 'undefined';
}
exports.isPrimitive = isPrimitive;

exports.isBuffer = Buffer.isBuffer;

function objectToString(o) {
  return Object.prototype.toString.call(o);
}

}).call(this,{"isBuffer":require("../../is-buffer/index.js")})
},{"../../is-buffer/index.js":32}],27:[function(require,module,exports){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

function EventEmitter() {
  this._events = this._events || {};
  this._maxListeners = this._maxListeners || undefined;
}
module.exports = EventEmitter;

// Backwards-compat with node 0.10.x
EventEmitter.EventEmitter = EventEmitter;

EventEmitter.prototype._events = undefined;
EventEmitter.prototype._maxListeners = undefined;

// By default EventEmitters will print a warning if more than 10 listeners are
// added to it. This is a useful default which helps finding memory leaks.
EventEmitter.defaultMaxListeners = 10;

// Obviously not all Emitters should be limited to 10. This function allows
// that to be increased. Set to zero for unlimited.
EventEmitter.prototype.setMaxListeners = function(n) {
  if (!isNumber(n) || n < 0 || isNaN(n))
    throw TypeError('n must be a positive number');
  this._maxListeners = n;
  return this;
};

EventEmitter.prototype.emit = function(type) {
  var er, handler, len, args, i, listeners;

  if (!this._events)
    this._events = {};

  // If there is no 'error' event listener then throw.
  if (type === 'error') {
    if (!this._events.error ||
        (isObject(this._events.error) && !this._events.error.length)) {
      er = arguments[1];
      if (er instanceof Error) {
        throw er; // Unhandled 'error' event
      } else {
        // At least give some kind of context to the user
        var err = new Error('Uncaught, unspecified "error" event. (' + er + ')');
        err.context = er;
        throw err;
      }
    }
  }

  handler = this._events[type];

  if (isUndefined(handler))
    return false;

  if (isFunction(handler)) {
    switch (arguments.length) {
      // fast cases
      case 1:
        handler.call(this);
        break;
      case 2:
        handler.call(this, arguments[1]);
        break;
      case 3:
        handler.call(this, arguments[1], arguments[2]);
        break;
      // slower
      default:
        args = Array.prototype.slice.call(arguments, 1);
        handler.apply(this, args);
    }
  } else if (isObject(handler)) {
    args = Array.prototype.slice.call(arguments, 1);
    listeners = handler.slice();
    len = listeners.length;
    for (i = 0; i < len; i++)
      listeners[i].apply(this, args);
  }

  return true;
};

EventEmitter.prototype.addListener = function(type, listener) {
  var m;

  if (!isFunction(listener))
    throw TypeError('listener must be a function');

  if (!this._events)
    this._events = {};

  // To avoid recursion in the case that type === "newListener"! Before
  // adding it to the listeners, first emit "newListener".
  if (this._events.newListener)
    this.emit('newListener', type,
              isFunction(listener.listener) ?
              listener.listener : listener);

  if (!this._events[type])
    // Optimize the case of one listener. Don't need the extra array object.
    this._events[type] = listener;
  else if (isObject(this._events[type]))
    // If we've already got an array, just append.
    this._events[type].push(listener);
  else
    // Adding the second element, need to change to array.
    this._events[type] = [this._events[type], listener];

  // Check for listener leak
  if (isObject(this._events[type]) && !this._events[type].warned) {
    if (!isUndefined(this._maxListeners)) {
      m = this._maxListeners;
    } else {
      m = EventEmitter.defaultMaxListeners;
    }

    if (m && m > 0 && this._events[type].length > m) {
      this._events[type].warned = true;
      console.error('(node) warning: possible EventEmitter memory ' +
                    'leak detected. %d listeners added. ' +
                    'Use emitter.setMaxListeners() to increase limit.',
                    this._events[type].length);
      if (typeof console.trace === 'function') {
        // not supported in IE 10
        console.trace();
      }
    }
  }

  return this;
};

EventEmitter.prototype.on = EventEmitter.prototype.addListener;

EventEmitter.prototype.once = function(type, listener) {
  if (!isFunction(listener))
    throw TypeError('listener must be a function');

  var fired = false;

  function g() {
    this.removeListener(type, g);

    if (!fired) {
      fired = true;
      listener.apply(this, arguments);
    }
  }

  g.listener = listener;
  this.on(type, g);

  return this;
};

// emits a 'removeListener' event iff the listener was removed
EventEmitter.prototype.removeListener = function(type, listener) {
  var list, position, length, i;

  if (!isFunction(listener))
    throw TypeError('listener must be a function');

  if (!this._events || !this._events[type])
    return this;

  list = this._events[type];
  length = list.length;
  position = -1;

  if (list === listener ||
      (isFunction(list.listener) && list.listener === listener)) {
    delete this._events[type];
    if (this._events.removeListener)
      this.emit('removeListener', type, listener);

  } else if (isObject(list)) {
    for (i = length; i-- > 0;) {
      if (list[i] === listener ||
          (list[i].listener && list[i].listener === listener)) {
        position = i;
        break;
      }
    }

    if (position < 0)
      return this;

    if (list.length === 1) {
      list.length = 0;
      delete this._events[type];
    } else {
      list.splice(position, 1);
    }

    if (this._events.removeListener)
      this.emit('removeListener', type, listener);
  }

  return this;
};

EventEmitter.prototype.removeAllListeners = function(type) {
  var key, listeners;

  if (!this._events)
    return this;

  // not listening for removeListener, no need to emit
  if (!this._events.removeListener) {
    if (arguments.length === 0)
      this._events = {};
    else if (this._events[type])
      delete this._events[type];
    return this;
  }

  // emit removeListener for all listeners on all events
  if (arguments.length === 0) {
    for (key in this._events) {
      if (key === 'removeListener') continue;
      this.removeAllListeners(key);
    }
    this.removeAllListeners('removeListener');
    this._events = {};
    return this;
  }

  listeners = this._events[type];

  if (isFunction(listeners)) {
    this.removeListener(type, listeners);
  } else if (listeners) {
    // LIFO order
    while (listeners.length)
      this.removeListener(type, listeners[listeners.length - 1]);
  }
  delete this._events[type];

  return this;
};

EventEmitter.prototype.listeners = function(type) {
  var ret;
  if (!this._events || !this._events[type])
    ret = [];
  else if (isFunction(this._events[type]))
    ret = [this._events[type]];
  else
    ret = this._events[type].slice();
  return ret;
};

EventEmitter.prototype.listenerCount = function(type) {
  if (this._events) {
    var evlistener = this._events[type];

    if (isFunction(evlistener))
      return 1;
    else if (evlistener)
      return evlistener.length;
  }
  return 0;
};

EventEmitter.listenerCount = function(emitter, type) {
  return emitter.listenerCount(type);
};

function isFunction(arg) {
  return typeof arg === 'function';
}

function isNumber(arg) {
  return typeof arg === 'number';
}

function isObject(arg) {
  return typeof arg === 'object' && arg !== null;
}

function isUndefined(arg) {
  return arg === void 0;
}

},{}],28:[function(require,module,exports){
(function (root, factory) {
    // Hack to make all exports of this module sha256 function object properties.
    var exports = {};
    factory(exports);
    var sha256 = exports["default"];
    for (var k in exports) {
        sha256[k] = exports[k];
    }
        
    if (typeof module === 'object' && typeof module.exports === 'object') {
        module.exports = sha256;
    } else if (typeof define === 'function' && define.amd) {
        define(function() { return sha256; }); 
    } else {
        root.sha256 = sha256;
    }
})(this, function(exports) {
"use strict";
// SHA-256 (+ HMAC and PBKDF2) for JavaScript.
//
// Written in 2014-2016 by Dmitry Chestnykh.
// Public domain, no warranty.
//
// Functions (accept and return Uint8Arrays):
//
//   sha256(message) -> hash
//   sha256.hmac(key, message) -> mac
//   sha256.pbkdf2(password, salt, rounds, dkLen) -> dk
//
//  Classes:
//
//   new sha256.Hash()
//   new sha256.HMAC(key)
//
exports.digestLength = 32;
exports.blockSize = 64;
// SHA-256 constants
var K = new Uint32Array([
    0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b,
    0x59f111f1, 0x923f82a4, 0xab1c5ed5, 0xd807aa98, 0x12835b01,
    0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7,
    0xc19bf174, 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,
    0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da, 0x983e5152,
    0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147,
    0x06ca6351, 0x14292967, 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc,
    0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
    0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819,
    0xd6990624, 0xf40e3585, 0x106aa070, 0x19a4c116, 0x1e376c08,
    0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f,
    0x682e6ff3, 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
    0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
]);
function hashBlocks(w, v, p, pos, len) {
    var a, b, c, d, e, f, g, h, u, i, j, t1, t2;
    while (len >= 64) {
        a = v[0];
        b = v[1];
        c = v[2];
        d = v[3];
        e = v[4];
        f = v[5];
        g = v[6];
        h = v[7];
        for (i = 0; i < 16; i++) {
            j = pos + i * 4;
            w[i] = (((p[j] & 0xff) << 24) | ((p[j + 1] & 0xff) << 16) |
                ((p[j + 2] & 0xff) << 8) | (p[j + 3] & 0xff));
        }
        for (i = 16; i < 64; i++) {
            u = w[i - 2];
            t1 = (u >>> 17 | u << (32 - 17)) ^ (u >>> 19 | u << (32 - 19)) ^ (u >>> 10);
            u = w[i - 15];
            t2 = (u >>> 7 | u << (32 - 7)) ^ (u >>> 18 | u << (32 - 18)) ^ (u >>> 3);
            w[i] = (t1 + w[i - 7] | 0) + (t2 + w[i - 16] | 0);
        }
        for (i = 0; i < 64; i++) {
            t1 = (((((e >>> 6 | e << (32 - 6)) ^ (e >>> 11 | e << (32 - 11)) ^
                (e >>> 25 | e << (32 - 25))) + ((e & f) ^ (~e & g))) | 0) +
                ((h + ((K[i] + w[i]) | 0)) | 0)) | 0;
            t2 = (((a >>> 2 | a << (32 - 2)) ^ (a >>> 13 | a << (32 - 13)) ^
                (a >>> 22 | a << (32 - 22))) + ((a & b) ^ (a & c) ^ (b & c))) | 0;
            h = g;
            g = f;
            f = e;
            e = (d + t1) | 0;
            d = c;
            c = b;
            b = a;
            a = (t1 + t2) | 0;
        }
        v[0] += a;
        v[1] += b;
        v[2] += c;
        v[3] += d;
        v[4] += e;
        v[5] += f;
        v[6] += g;
        v[7] += h;
        pos += 64;
        len -= 64;
    }
    return pos;
}
// Hash implements SHA256 hash algorithm.
var Hash = (function () {
    function Hash() {
        this.digestLength = exports.digestLength;
        this.blockSize = exports.blockSize;
        // Note: Int32Array is used instead of Uint32Array for performance reasons.
        this.state = new Int32Array(8); // hash state
        this.temp = new Int32Array(64); // temporary state
        this.buffer = new Uint8Array(128); // buffer for data to hash
        this.bufferLength = 0; // number of bytes in buffer
        this.bytesHashed = 0; // number of total bytes hashed
        this.finished = false; // indicates whether the hash was finalized
        this.reset();
    }
    // Resets hash state making it possible
    // to re-use this instance to hash other data.
    Hash.prototype.reset = function () {
        this.state[0] = 0x6a09e667;
        this.state[1] = 0xbb67ae85;
        this.state[2] = 0x3c6ef372;
        this.state[3] = 0xa54ff53a;
        this.state[4] = 0x510e527f;
        this.state[5] = 0x9b05688c;
        this.state[6] = 0x1f83d9ab;
        this.state[7] = 0x5be0cd19;
        this.bufferLength = 0;
        this.bytesHashed = 0;
        this.finished = false;
        return this;
    };
    // Cleans internal buffers and re-initializes hash state.
    Hash.prototype.clean = function () {
        for (var i = 0; i < this.buffer.length; i++)
            this.buffer[i] = 0;
        for (var i = 0; i < this.temp.length; i++)
            this.temp[i] = 0;
        this.reset();
    };
    // Updates hash state with the given data.
    //
    // Optionally, length of the data can be specified to hash
    // fewer bytes than data.length.
    //
    // Throws error when trying to update already finalized hash:
    // instance must be reset to use it again.
    Hash.prototype.update = function (data, dataLength) {
        if (dataLength === void 0) { dataLength = data.length; }
        if (this.finished) {
            throw new Error("SHA256: can't update because hash was finished.");
        }
        var dataPos = 0;
        this.bytesHashed += dataLength;
        if (this.bufferLength > 0) {
            while (this.bufferLength < 64 && dataLength > 0) {
                this.buffer[this.bufferLength++] = data[dataPos++];
                dataLength--;
            }
            if (this.bufferLength === 64) {
                hashBlocks(this.temp, this.state, this.buffer, 0, 64);
                this.bufferLength = 0;
            }
        }
        if (dataLength >= 64) {
            dataPos = hashBlocks(this.temp, this.state, data, dataPos, dataLength);
            dataLength %= 64;
        }
        while (dataLength > 0) {
            this.buffer[this.bufferLength++] = data[dataPos++];
            dataLength--;
        }
        return this;
    };
    // Finalizes hash state and puts hash into out.
    //
    // If hash was already finalized, puts the same value.
    Hash.prototype.finish = function (out) {
        if (!this.finished) {
            var bytesHashed = this.bytesHashed;
            var left = this.bufferLength;
            var bitLenHi = (bytesHashed / 0x20000000) | 0;
            var bitLenLo = bytesHashed << 3;
            var padLength = (bytesHashed % 64 < 56) ? 64 : 128;
            this.buffer[left] = 0x80;
            for (var i = left + 1; i < padLength - 8; i++) {
                this.buffer[i] = 0;
            }
            this.buffer[padLength - 8] = (bitLenHi >>> 24) & 0xff;
            this.buffer[padLength - 7] = (bitLenHi >>> 16) & 0xff;
            this.buffer[padLength - 6] = (bitLenHi >>> 8) & 0xff;
            this.buffer[padLength - 5] = (bitLenHi >>> 0) & 0xff;
            this.buffer[padLength - 4] = (bitLenLo >>> 24) & 0xff;
            this.buffer[padLength - 3] = (bitLenLo >>> 16) & 0xff;
            this.buffer[padLength - 2] = (bitLenLo >>> 8) & 0xff;
            this.buffer[padLength - 1] = (bitLenLo >>> 0) & 0xff;
            hashBlocks(this.temp, this.state, this.buffer, 0, padLength);
            this.finished = true;
        }
        for (var i = 0; i < 8; i++) {
            out[i * 4 + 0] = (this.state[i] >>> 24) & 0xff;
            out[i * 4 + 1] = (this.state[i] >>> 16) & 0xff;
            out[i * 4 + 2] = (this.state[i] >>> 8) & 0xff;
            out[i * 4 + 3] = (this.state[i] >>> 0) & 0xff;
        }
        return this;
    };
    // Returns the final hash digest.
    Hash.prototype.digest = function () {
        var out = new Uint8Array(this.digestLength);
        this.finish(out);
        return out;
    };
    // Internal function for use in HMAC for optimization.
    Hash.prototype._saveState = function (out) {
        for (var i = 0; i < this.state.length; i++) {
            out[i] = this.state[i];
        }
    };
    // Internal function for use in HMAC for optimization.
    Hash.prototype._restoreState = function (from, bytesHashed) {
        for (var i = 0; i < this.state.length; i++) {
            this.state[i] = from[i];
        }
        this.bytesHashed = bytesHashed;
        this.finished = false;
        this.bufferLength = 0;
    };
    return Hash;
}());
exports.Hash = Hash;
// HMAC implements HMAC-SHA256 message authentication algorithm.
var HMAC = (function () {
    function HMAC(key) {
        this.inner = new Hash();
        this.outer = new Hash();
        this.blockSize = this.inner.blockSize;
        this.digestLength = this.inner.digestLength;
        var pad = new Uint8Array(this.blockSize);
        if (key.length > this.blockSize) {
            (new Hash()).update(key).finish(pad).clean();
        }
        else {
            for (var i = 0; i < key.length; i++) {
                pad[i] = key[i];
            }
        }
        for (var i = 0; i < pad.length; i++) {
            pad[i] ^= 0x36;
        }
        this.inner.update(pad);
        for (var i = 0; i < pad.length; i++) {
            pad[i] ^= 0x36 ^ 0x5c;
        }
        this.outer.update(pad);
        this.istate = new Uint32Array(this.digestLength / 4);
        this.ostate = new Uint32Array(this.digestLength / 4);
        this.inner._saveState(this.istate);
        this.outer._saveState(this.ostate);
        for (var i = 0; i < pad.length; i++) {
            pad[i] = 0;
        }
    }
    // Returns HMAC state to the state initialized with key
    // to make it possible to run HMAC over the other data with the same
    // key without creating a new instance.
    HMAC.prototype.reset = function () {
        this.inner._restoreState(this.istate, this.inner.blockSize);
        this.outer._restoreState(this.ostate, this.outer.blockSize);
        return this;
    };
    // Cleans HMAC state.
    HMAC.prototype.clean = function () {
        for (var i = 0; i < this.istate.length; i++) {
            this.ostate[i] = this.istate[i] = 0;
        }
        this.inner.clean();
        this.outer.clean();
    };
    // Updates state with provided data.
    HMAC.prototype.update = function (data) {
        this.inner.update(data);
        return this;
    };
    // Finalizes HMAC and puts the result in out.
    HMAC.prototype.finish = function (out) {
        if (this.outer.finished) {
            this.outer.finish(out);
        }
        else {
            this.inner.finish(out);
            this.outer.update(out, this.digestLength).finish(out);
        }
        return this;
    };
    // Returns message authentication code.
    HMAC.prototype.digest = function () {
        var out = new Uint8Array(this.digestLength);
        this.finish(out);
        return out;
    };
    return HMAC;
}());
exports.HMAC = HMAC;
// Returns SHA256 hash of data.
function hash(data) {
    var h = (new Hash()).update(data);
    var digest = h.digest();
    h.clean();
    return digest;
}
exports.hash = hash;
exports.__esModule = true;
exports["default"] = hash;
// Returns HMAC-SHA256 of data under the key.
function hmac(key, data) {
    var h = (new HMAC(key)).update(data);
    var digest = h.digest();
    h.clean();
    return digest;
}
exports.hmac = hmac;
// Derives a key from password and salt using PBKDF2-HMAC-SHA256
// with the given number of iterations.
//
// The number of bytes returned is equal to dkLen.
//
// (For better security, avoid dkLen greater than hash length - 32 bytes).
function pbkdf2(password, salt, iterations, dkLen) {
    var prf = new HMAC(password);
    var len = prf.digestLength;
    var ctr = new Uint8Array(4);
    var t = new Uint8Array(len);
    var u = new Uint8Array(len);
    var dk = new Uint8Array(dkLen);
    for (var i = 0; i * len < dkLen; i++) {
        var c = i + 1;
        ctr[0] = (c >>> 24) & 0xff;
        ctr[1] = (c >>> 16) & 0xff;
        ctr[2] = (c >>> 8) & 0xff;
        ctr[3] = (c >>> 0) & 0xff;
        prf.reset();
        prf.update(salt);
        prf.update(ctr);
        prf.finish(u);
        for (var j = 0; j < len; j++) {
            t[j] = u[j];
        }
        for (var j = 2; j <= iterations; j++) {
            prf.reset();
            prf.update(u).finish(u);
            for (var k = 0; k < len; k++) {
                t[k] ^= u[k];
            }
        }
        for (var j = 0; j < len && i * len + j < dkLen; j++) {
            dk[i * len + j] = t[j];
        }
    }
    for (var i = 0; i < len; i++) {
        t[i] = u[i] = 0;
    }
    for (var i = 0; i < 4; i++) {
        ctr[i] = 0;
    }
    prf.clean();
    return dk;
}
exports.pbkdf2 = pbkdf2;
});

},{}],29:[function(require,module,exports){
(function (Buffer){
'use strict'
var Transform = require('stream').Transform
var inherits = require('inherits')

function HashBase (blockSize) {
  Transform.call(this)

  this._block = new Buffer(blockSize)
  this._blockSize = blockSize
  this._blockOffset = 0
  this._length = [0, 0, 0, 0]

  this._finalized = false
}

inherits(HashBase, Transform)

HashBase.prototype._transform = function (chunk, encoding, callback) {
  var error = null
  try {
    if (encoding !== 'buffer') chunk = new Buffer(chunk, encoding)
    this.update(chunk)
  } catch (err) {
    error = err
  }

  callback(error)
}

HashBase.prototype._flush = function (callback) {
  var error = null
  try {
    this.push(this._digest())
  } catch (err) {
    error = err
  }

  callback(error)
}

HashBase.prototype.update = function (data, encoding) {
  if (!Buffer.isBuffer(data) && typeof data !== 'string') throw new TypeError('Data must be a string or a buffer')
  if (this._finalized) throw new Error('Digest already called')
  if (!Buffer.isBuffer(data)) data = new Buffer(data, encoding || 'binary')

  // consume data
  var block = this._block
  var offset = 0
  while (this._blockOffset + data.length - offset >= this._blockSize) {
    for (var i = this._blockOffset; i < this._blockSize;) block[i++] = data[offset++]
    this._update()
    this._blockOffset = 0
  }
  while (offset < data.length) block[this._blockOffset++] = data[offset++]

  // update length
  for (var j = 0, carry = data.length * 8; carry > 0; ++j) {
    this._length[j] += carry
    carry = (this._length[j] / 0x0100000000) | 0
    if (carry > 0) this._length[j] -= 0x0100000000 * carry
  }

  return this
}

HashBase.prototype._update = function (data) {
  throw new Error('_update is not implemented')
}

HashBase.prototype.digest = function (encoding) {
  if (this._finalized) throw new Error('Digest already called')
  this._finalized = true

  var digest = this._digest()
  if (encoding !== undefined) digest = digest.toString(encoding)
  return digest
}

HashBase.prototype._digest = function () {
  throw new Error('_digest is not implemented')
}

module.exports = HashBase

}).call(this,require("buffer").Buffer)
},{"buffer":24,"inherits":31,"stream":52}],30:[function(require,module,exports){
exports.read = function (buffer, offset, isLE, mLen, nBytes) {
  var e, m
  var eLen = (nBytes * 8) - mLen - 1
  var eMax = (1 << eLen) - 1
  var eBias = eMax >> 1
  var nBits = -7
  var i = isLE ? (nBytes - 1) : 0
  var d = isLE ? -1 : 1
  var s = buffer[offset + i]

  i += d

  e = s & ((1 << (-nBits)) - 1)
  s >>= (-nBits)
  nBits += eLen
  for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) {}

  m = e & ((1 << (-nBits)) - 1)
  e >>= (-nBits)
  nBits += mLen
  for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) {}

  if (e === 0) {
    e = 1 - eBias
  } else if (e === eMax) {
    return m ? NaN : ((s ? -1 : 1) * Infinity)
  } else {
    m = m + Math.pow(2, mLen)
    e = e - eBias
  }
  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)
}

exports.write = function (buffer, value, offset, isLE, mLen, nBytes) {
  var e, m, c
  var eLen = (nBytes * 8) - mLen - 1
  var eMax = (1 << eLen) - 1
  var eBias = eMax >> 1
  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)
  var i = isLE ? 0 : (nBytes - 1)
  var d = isLE ? 1 : -1
  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0

  value = Math.abs(value)

  if (isNaN(value) || value === Infinity) {
    m = isNaN(value) ? 1 : 0
    e = eMax
  } else {
    e = Math.floor(Math.log(value) / Math.LN2)
    if (value * (c = Math.pow(2, -e)) < 1) {
      e--
      c *= 2
    }
    if (e + eBias >= 1) {
      value += rt / c
    } else {
      value += rt * Math.pow(2, 1 - eBias)
    }
    if (value * c >= 2) {
      e++
      c /= 2
    }

    if (e + eBias >= eMax) {
      m = 0
      e = eMax
    } else if (e + eBias >= 1) {
      m = ((value * c) - 1) * Math.pow(2, mLen)
      e = e + eBias
    } else {
      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)
      e = 0
    }
  }

  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}

  e = (e << mLen) | m
  eLen += mLen
  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}

  buffer[offset + i - d] |= s * 128
}

},{}],31:[function(require,module,exports){
if (typeof Object.create === 'function') {
  // implementation from standard node.js 'util' module
  module.exports = function inherits(ctor, superCtor) {
    ctor.super_ = superCtor
    ctor.prototype = Object.create(superCtor.prototype, {
      constructor: {
        value: ctor,
        enumerable: false,
        writable: true,
        configurable: true
      }
    });
  };
} else {
  // old school shim for old browsers
  module.exports = function inherits(ctor, superCtor) {
    ctor.super_ = superCtor
    var TempCtor = function () {}
    TempCtor.prototype = superCtor.prototype
    ctor.prototype = new TempCtor()
    ctor.prototype.constructor = ctor
  }
}

},{}],32:[function(require,module,exports){
/*!
 * Determine if an object is a Buffer
 *
 * @author   Feross Aboukhadijeh <https://feross.org>
 * @license  MIT
 */

// The _isBuffer check is for Safari 5-7 support, because it's missing
// Object.prototype.constructor. Remove this eventually
module.exports = function (obj) {
  return obj != null && (isBuffer(obj) || isSlowBuffer(obj) || !!obj._isBuffer)
}

function isBuffer (obj) {
  return !!obj.constructor && typeof obj.constructor.isBuffer === 'function' && obj.constructor.isBuffer(obj)
}

// For Node v0.10 support. Remove this eventually.
function isSlowBuffer (obj) {
  return typeof obj.readFloatLE === 'function' && typeof obj.slice === 'function' && isBuffer(obj.slice(0, 0))
}

},{}],33:[function(require,module,exports){
var toString = {}.toString;

module.exports = Array.isArray || function (arr) {
  return toString.call(arr) == '[object Array]';
};

},{}],34:[function(require,module,exports){
/*
 Copyright 2013 Daniel Wirtz <dcode@dcode.io>
 Copyright 2009 The Closure Library Authors. All Rights Reserved.

 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at

 http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS-IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 */

/**
 * @license long.js (c) 2013 Daniel Wirtz <dcode@dcode.io>
 * Released under the Apache License, Version 2.0
 * see: https://github.com/dcodeIO/long.js for details
 */
(function(global, factory) {

    /* AMD */ if (typeof define === 'function' && define["amd"])
        define([], factory);
    /* CommonJS */ else if (typeof require === 'function' && typeof module === "object" && module && module["exports"])
        module["exports"] = factory();
    /* Global */ else
        (global["dcodeIO"] = global["dcodeIO"] || {})["Long"] = factory();

})(this, function() {
    "use strict";

    /**
     * Constructs a 64 bit two's-complement integer, given its low and high 32 bit values as *signed* integers.
     *  See the from* functions below for more convenient ways of constructing Longs.
     * @exports Long
     * @class A Long class for representing a 64 bit two's-complement integer value.
     * @param {number} low The low (signed) 32 bits of the long
     * @param {number} high The high (signed) 32 bits of the long
     * @param {boolean=} unsigned Whether unsigned or not, defaults to `false` for signed
     * @constructor
     */
    function Long(low, high, unsigned) {

        /**
         * The low 32 bits as a signed value.
         * @type {number}
         */
        this.low = low | 0;

        /**
         * The high 32 bits as a signed value.
         * @type {number}
         */
        this.high = high | 0;

        /**
         * Whether unsigned or not.
         * @type {boolean}
         */
        this.unsigned = !!unsigned;
    }

    // The internal representation of a long is the two given signed, 32-bit values.
    // We use 32-bit pieces because these are the size of integers on which
    // Javascript performs bit-operations.  For operations like addition and
    // multiplication, we split each number into 16 bit pieces, which can easily be
    // multiplied within Javascript's floating-point representation without overflow
    // or change in sign.
    //
    // In the algorithms below, we frequently reduce the negative case to the
    // positive case by negating the input(s) and then post-processing the result.
    // Note that we must ALWAYS check specially whether those values are MIN_VALUE
    // (-2^63) because -MIN_VALUE == MIN_VALUE (since 2^63 cannot be represented as
    // a positive number, it overflows back into a negative).  Not handling this
    // case would often result in infinite recursion.
    //
    // Common constant values ZERO, ONE, NEG_ONE, etc. are defined below the from*
    // methods on which they depend.

    /**
     * An indicator used to reliably determine if an object is a Long or not.
     * @type {boolean}
     * @const
     * @private
     */
    Long.prototype.__isLong__;

    Object.defineProperty(Long.prototype, "__isLong__", {
        value: true,
        enumerable: false,
        configurable: false
    });

    /**
     * @function
     * @param {*} obj Object
     * @returns {boolean}
     * @inner
     */
    function isLong(obj) {
        return (obj && obj["__isLong__"]) === true;
    }

    /**
     * Tests if the specified object is a Long.
     * @function
     * @param {*} obj Object
     * @returns {boolean}
     */
    Long.isLong = isLong;

    /**
     * A cache of the Long representations of small integer values.
     * @type {!Object}
     * @inner
     */
    var INT_CACHE = {};

    /**
     * A cache of the Long representations of small unsigned integer values.
     * @type {!Object}
     * @inner
     */
    var UINT_CACHE = {};

    /**
     * @param {number} value
     * @param {boolean=} unsigned
     * @returns {!Long}
     * @inner
     */
    function fromInt(value, unsigned) {
        var obj, cachedObj, cache;
        if (unsigned) {
            value >>>= 0;
            if (cache = (0 <= value && value < 256)) {
                cachedObj = UINT_CACHE[value];
                if (cachedObj)
                    return cachedObj;
            }
            obj = fromBits(value, (value | 0) < 0 ? -1 : 0, true);
            if (cache)
                UINT_CACHE[value] = obj;
            return obj;
        } else {
            value |= 0;
            if (cache = (-128 <= value && value < 128)) {
                cachedObj = INT_CACHE[value];
                if (cachedObj)
                    return cachedObj;
            }
            obj = fromBits(value, value < 0 ? -1 : 0, false);
            if (cache)
                INT_CACHE[value] = obj;
            return obj;
        }
    }

    /**
     * Returns a Long representing the given 32 bit integer value.
     * @function
     * @param {number} value The 32 bit integer in question
     * @param {boolean=} unsigned Whether unsigned or not, defaults to `false` for signed
     * @returns {!Long} The corresponding Long value
     */
    Long.fromInt = fromInt;

    /**
     * @param {number} value
     * @param {boolean=} unsigned
     * @returns {!Long}
     * @inner
     */
    function fromNumber(value, unsigned) {
        if (isNaN(value) || !isFinite(value))
            return unsigned ? UZERO : ZERO;
        if (unsigned) {
            if (value < 0)
                return UZERO;
            if (value >= TWO_PWR_64_DBL)
                return MAX_UNSIGNED_VALUE;
        } else {
            if (value <= -TWO_PWR_63_DBL)
                return MIN_VALUE;
            if (value + 1 >= TWO_PWR_63_DBL)
                return MAX_VALUE;
        }
        if (value < 0)
            return fromNumber(-value, unsigned).neg();
        return fromBits((value % TWO_PWR_32_DBL) | 0, (value / TWO_PWR_32_DBL) | 0, unsigned);
    }

    /**
     * Returns a Long representing the given value, provided that it is a finite number. Otherwise, zero is returned.
     * @function
     * @param {number} value The number in question
     * @param {boolean=} unsigned Whether unsigned or not, defaults to `false` for signed
     * @returns {!Long} The corresponding Long value
     */
    Long.fromNumber = fromNumber;

    /**
     * @param {number} lowBits
     * @param {number} highBits
     * @param {boolean=} unsigned
     * @returns {!Long}
     * @inner
     */
    function fromBits(lowBits, highBits, unsigned) {
        return new Long(lowBits, highBits, unsigned);
    }

    /**
     * Returns a Long representing the 64 bit integer that comes by concatenating the given low and high bits. Each is
     *  assumed to use 32 bits.
     * @function
     * @param {number} lowBits The low 32 bits
     * @param {number} highBits The high 32 bits
     * @param {boolean=} unsigned Whether unsigned or not, defaults to `false` for signed
     * @returns {!Long} The corresponding Long value
     */
    Long.fromBits = fromBits;

    /**
     * @function
     * @param {number} base
     * @param {number} exponent
     * @returns {number}
     * @inner
     */
    var pow_dbl = Math.pow; // Used 4 times (4*8 to 15+4)

    /**
     * @param {string} str
     * @param {(boolean|number)=} unsigned
     * @param {number=} radix
     * @returns {!Long}
     * @inner
     */
    function fromString(str, unsigned, radix) {
        if (str.length === 0)
            throw Error('empty string');
        if (str === "NaN" || str === "Infinity" || str === "+Infinity" || str === "-Infinity")
            return ZERO;
        if (typeof unsigned === 'number') {
            // For goog.math.long compatibility
            radix = unsigned,
            unsigned = false;
        } else {
            unsigned = !! unsigned;
        }
        radix = radix || 10;
        if (radix < 2 || 36 < radix)
            throw RangeError('radix');

        var p;
        if ((p = str.indexOf('-')) > 0)
            throw Error('interior hyphen');
        else if (p === 0) {
            return fromString(str.substring(1), unsigned, radix).neg();
        }

        // Do several (8) digits each time through the loop, so as to
        // minimize the calls to the very expensive emulated div.
        var radixToPower = fromNumber(pow_dbl(radix, 8));

        var result = ZERO;
        for (var i = 0; i < str.length; i += 8) {
            var size = Math.min(8, str.length - i),
                value = parseInt(str.substring(i, i + size), radix);
            if (size < 8) {
                var power = fromNumber(pow_dbl(radix, size));
                result = result.mul(power).add(fromNumber(value));
            } else {
                result = result.mul(radixToPower);
                result = result.add(fromNumber(value));
            }
        }
        result.unsigned = unsigned;
        return result;
    }

    /**
     * Returns a Long representation of the given string, written using the specified radix.
     * @function
     * @param {string} str The textual representation of the Long
     * @param {(boolean|number)=} unsigned Whether unsigned or not, defaults to `false` for signed
     * @param {number=} radix The radix in which the text is written (2-36), defaults to 10
     * @returns {!Long} The corresponding Long value
     */
    Long.fromString = fromString;

    /**
     * @function
     * @param {!Long|number|string|!{low: number, high: number, unsigned: boolean}} val
     * @returns {!Long}
     * @inner
     */
    function fromValue(val) {
        if (val /* is compatible */ instanceof Long)
            return val;
        if (typeof val === 'number')
            return fromNumber(val);
        if (typeof val === 'string')
            return fromString(val);
        // Throws for non-objects, converts non-instanceof Long:
        return fromBits(val.low, val.high, val.unsigned);
    }

    /**
     * Converts the specified value to a Long.
     * @function
     * @param {!Long|number|string|!{low: number, high: number, unsigned: boolean}} val Value
     * @returns {!Long}
     */
    Long.fromValue = fromValue;

    // NOTE: the compiler should inline these constant values below and then remove these variables, so there should be
    // no runtime penalty for these.

    /**
     * @type {number}
     * @const
     * @inner
     */
    var TWO_PWR_16_DBL = 1 << 16;

    /**
     * @type {number}
     * @const
     * @inner
     */
    var TWO_PWR_24_DBL = 1 << 24;

    /**
     * @type {number}
     * @const
     * @inner
     */
    var TWO_PWR_32_DBL = TWO_PWR_16_DBL * TWO_PWR_16_DBL;

    /**
     * @type {number}
     * @const
     * @inner
     */
    var TWO_PWR_64_DBL = TWO_PWR_32_DBL * TWO_PWR_32_DBL;

    /**
     * @type {number}
     * @const
     * @inner
     */
    var TWO_PWR_63_DBL = TWO_PWR_64_DBL / 2;

    /**
     * @type {!Long}
     * @const
     * @inner
     */
    var TWO_PWR_24 = fromInt(TWO_PWR_24_DBL);

    /**
     * @type {!Long}
     * @inner
     */
    var ZERO = fromInt(0);

    /**
     * Signed zero.
     * @type {!Long}
     */
    Long.ZERO = ZERO;

    /**
     * @type {!Long}
     * @inner
     */
    var UZERO = fromInt(0, true);

    /**
     * Unsigned zero.
     * @type {!Long}
     */
    Long.UZERO = UZERO;

    /**
     * @type {!Long}
     * @inner
     */
    var ONE = fromInt(1);

    /**
     * Signed one.
     * @type {!Long}
     */
    Long.ONE = ONE;

    /**
     * @type {!Long}
     * @inner
     */
    var UONE = fromInt(1, true);

    /**
     * Unsigned one.
     * @type {!Long}
     */
    Long.UONE = UONE;

    /**
     * @type {!Long}
     * @inner
     */
    var NEG_ONE = fromInt(-1);

    /**
     * Signed negative one.
     * @type {!Long}
     */
    Long.NEG_ONE = NEG_ONE;

    /**
     * @type {!Long}
     * @inner
     */
    var MAX_VALUE = fromBits(0xFFFFFFFF|0, 0x7FFFFFFF|0, false);

    /**
     * Maximum signed value.
     * @type {!Long}
     */
    Long.MAX_VALUE = MAX_VALUE;

    /**
     * @type {!Long}
     * @inner
     */
    var MAX_UNSIGNED_VALUE = fromBits(0xFFFFFFFF|0, 0xFFFFFFFF|0, true);

    /**
     * Maximum unsigned value.
     * @type {!Long}
     */
    Long.MAX_UNSIGNED_VALUE = MAX_UNSIGNED_VALUE;

    /**
     * @type {!Long}
     * @inner
     */
    var MIN_VALUE = fromBits(0, 0x80000000|0, false);

    /**
     * Minimum signed value.
     * @type {!Long}
     */
    Long.MIN_VALUE = MIN_VALUE;

    /**
     * @alias Long.prototype
     * @inner
     */
    var LongPrototype = Long.prototype;

    /**
     * Converts the Long to a 32 bit integer, assuming it is a 32 bit integer.
     * @returns {number}
     */
    LongPrototype.toInt = function toInt() {
        return this.unsigned ? this.low >>> 0 : this.low;
    };

    /**
     * Converts the Long to a the nearest floating-point representation of this value (double, 53 bit mantissa).
     * @returns {number}
     */
    LongPrototype.toNumber = function toNumber() {
        if (this.unsigned)
            return ((this.high >>> 0) * TWO_PWR_32_DBL) + (this.low >>> 0);
        return this.high * TWO_PWR_32_DBL + (this.low >>> 0);
    };

    /**
     * Converts the Long to a string written in the specified radix.
     * @param {number=} radix Radix (2-36), defaults to 10
     * @returns {string}
     * @override
     * @throws {RangeError} If `radix` is out of range
     */
    LongPrototype.toString = function toString(radix) {
        radix = radix || 10;
        if (radix < 2 || 36 < radix)
            throw RangeError('radix');
        if (this.isZero())
            return '0';
        if (this.isNegative()) { // Unsigned Longs are never negative
            if (this.eq(MIN_VALUE)) {
                // We need to change the Long value before it can be negated, so we remove
                // the bottom-most digit in this base and then recurse to do the rest.
                var radixLong = fromNumber(radix),
                    div = this.div(radixLong),
                    rem1 = div.mul(radixLong).sub(this);
                return div.toString(radix) + rem1.toInt().toString(radix);
            } else
                return '-' + this.neg().toString(radix);
        }

        // Do several (6) digits each time through the loop, so as to
        // minimize the calls to the very expensive emulated div.
        var radixToPower = fromNumber(pow_dbl(radix, 6), this.unsigned),
            rem = this;
        var result = '';
        while (true) {
            var remDiv = rem.div(radixToPower),
                intval = rem.sub(remDiv.mul(radixToPower)).toInt() >>> 0,
                digits = intval.toString(radix);
            rem = remDiv;
            if (rem.isZero())
                return digits + result;
            else {
                while (digits.length < 6)
                    digits = '0' + digits;
                result = '' + digits + result;
            }
        }
    };

    /**
     * Gets the high 32 bits as a signed integer.
     * @returns {number} Signed high bits
     */
    LongPrototype.getHighBits = function getHighBits() {
        return this.high;
    };

    /**
     * Gets the high 32 bits as an unsigned integer.
     * @returns {number} Unsigned high bits
     */
    LongPrototype.getHighBitsUnsigned = function getHighBitsUnsigned() {
        return this.high >>> 0;
    };

    /**
     * Gets the low 32 bits as a signed integer.
     * @returns {number} Signed low bits
     */
    LongPrototype.getLowBits = function getLowBits() {
        return this.low;
    };

    /**
     * Gets the low 32 bits as an unsigned integer.
     * @returns {number} Unsigned low bits
     */
    LongPrototype.getLowBitsUnsigned = function getLowBitsUnsigned() {
        return this.low >>> 0;
    };

    /**
     * Gets the number of bits needed to represent the absolute value of this Long.
     * @returns {number}
     */
    LongPrototype.getNumBitsAbs = function getNumBitsAbs() {
        if (this.isNegative()) // Unsigned Longs are never negative
            return this.eq(MIN_VALUE) ? 64 : this.neg().getNumBitsAbs();
        var val = this.high != 0 ? this.high : this.low;
        for (var bit = 31; bit > 0; bit--)
            if ((val & (1 << bit)) != 0)
                break;
        return this.high != 0 ? bit + 33 : bit + 1;
    };

    /**
     * Tests if this Long's value equals zero.
     * @returns {boolean}
     */
    LongPrototype.isZero = function isZero() {
        return this.high === 0 && this.low === 0;
    };

    /**
     * Tests if this Long's value is negative.
     * @returns {boolean}
     */
    LongPrototype.isNegative = function isNegative() {
        return !this.unsigned && this.high < 0;
    };

    /**
     * Tests if this Long's value is positive.
     * @returns {boolean}
     */
    LongPrototype.isPositive = function isPositive() {
        return this.unsigned || this.high >= 0;
    };

    /**
     * Tests if this Long's value is odd.
     * @returns {boolean}
     */
    LongPrototype.isOdd = function isOdd() {
        return (this.low & 1) === 1;
    };

    /**
     * Tests if this Long's value is even.
     * @returns {boolean}
     */
    LongPrototype.isEven = function isEven() {
        return (this.low & 1) === 0;
    };

    /**
     * Tests if this Long's value equals the specified's.
     * @param {!Long|number|string} other Other value
     * @returns {boolean}
     */
    LongPrototype.equals = function equals(other) {
        if (!isLong(other))
            other = fromValue(other);
        if (this.unsigned !== other.unsigned && (this.high >>> 31) === 1 && (other.high >>> 31) === 1)
            return false;
        return this.high === other.high && this.low === other.low;
    };

    /**
     * Tests if this Long's value equals the specified's. This is an alias of {@link Long#equals}.
     * @function
     * @param {!Long|number|string} other Other value
     * @returns {boolean}
     */
    LongPrototype.eq = LongPrototype.equals;

    /**
     * Tests if this Long's value differs from the specified's.
     * @param {!Long|number|string} other Other value
     * @returns {boolean}
     */
    LongPrototype.notEquals = function notEquals(other) {
        return !this.eq(/* validates */ other);
    };

    /**
     * Tests if this Long's value differs from the specified's. This is an alias of {@link Long#notEquals}.
     * @function
     * @param {!Long|number|string} other Other value
     * @returns {boolean}
     */
    LongPrototype.neq = LongPrototype.notEquals;

    /**
     * Tests if this Long's value is less than the specified's.
     * @param {!Long|number|string} other Other value
     * @returns {boolean}
     */
    LongPrototype.lessThan = function lessThan(other) {
        return this.comp(/* validates */ other) < 0;
    };

    /**
     * Tests if this Long's value is less than the specified's. This is an alias of {@link Long#lessThan}.
     * @function
     * @param {!Long|number|string} other Other value
     * @returns {boolean}
     */
    LongPrototype.lt = LongPrototype.lessThan;

    /**
     * Tests if this Long's value is less than or equal the specified's.
     * @param {!Long|number|string} other Other value
     * @returns {boolean}
     */
    LongPrototype.lessThanOrEqual = function lessThanOrEqual(other) {
        return this.comp(/* validates */ other) <= 0;
    };

    /**
     * Tests if this Long's value is less than or equal the specified's. This is an alias of {@link Long#lessThanOrEqual}.
     * @function
     * @param {!Long|number|string} other Other value
     * @returns {boolean}
     */
    LongPrototype.lte = LongPrototype.lessThanOrEqual;

    /**
     * Tests if this Long's value is greater than the specified's.
     * @param {!Long|number|string} other Other value
     * @returns {boolean}
     */
    LongPrototype.greaterThan = function greaterThan(other) {
        return this.comp(/* validates */ other) > 0;
    };

    /**
     * Tests if this Long's value is greater than the specified's. This is an alias of {@link Long#greaterThan}.
     * @function
     * @param {!Long|number|string} other Other value
     * @returns {boolean}
     */
    LongPrototype.gt = LongPrototype.greaterThan;

    /**
     * Tests if this Long's value is greater than or equal the specified's.
     * @param {!Long|number|string} other Other value
     * @returns {boolean}
     */
    LongPrototype.greaterThanOrEqual = function greaterThanOrEqual(other) {
        return this.comp(/* validates */ other) >= 0;
    };

    /**
     * Tests if this Long's value is greater than or equal the specified's. This is an alias of {@link Long#greaterThanOrEqual}.
     * @function
     * @param {!Long|number|string} other Other value
     * @returns {boolean}
     */
    LongPrototype.gte = LongPrototype.greaterThanOrEqual;

    /**
     * Compares this Long's value with the specified's.
     * @param {!Long|number|string} other Other value
     * @returns {number} 0 if they are the same, 1 if the this is greater and -1
     *  if the given one is greater
     */
    LongPrototype.compare = function compare(other) {
        if (!isLong(other))
            other = fromValue(other);
        if (this.eq(other))
            return 0;
        var thisNeg = this.isNegative(),
            otherNeg = other.isNegative();
        if (thisNeg && !otherNeg)
            return -1;
        if (!thisNeg && otherNeg)
            return 1;
        // At this point the sign bits are the same
        if (!this.unsigned)
            return this.sub(other).isNegative() ? -1 : 1;
        // Both are positive if at least one is unsigned
        return (other.high >>> 0) > (this.high >>> 0) || (other.high === this.high && (other.low >>> 0) > (this.low >>> 0)) ? -1 : 1;
    };

    /**
     * Compares this Long's value with the specified's. This is an alias of {@link Long#compare}.
     * @function
     * @param {!Long|number|string} other Other value
     * @returns {number} 0 if they are the same, 1 if the this is greater and -1
     *  if the given one is greater
     */
    LongPrototype.comp = LongPrototype.compare;

    /**
     * Negates this Long's value.
     * @returns {!Long} Negated Long
     */
    LongPrototype.negate = function negate() {
        if (!this.unsigned && this.eq(MIN_VALUE))
            return MIN_VALUE;
        return this.not().add(ONE);
    };

    /**
     * Negates this Long's value. This is an alias of {@link Long#negate}.
     * @function
     * @returns {!Long} Negated Long
     */
    LongPrototype.neg = LongPrototype.negate;

    /**
     * Returns the sum of this and the specified Long.
     * @param {!Long|number|string} addend Addend
     * @returns {!Long} Sum
     */
    LongPrototype.add = function add(addend) {
        if (!isLong(addend))
            addend = fromValue(addend);

        // Divide each number into 4 chunks of 16 bits, and then sum the chunks.

        var a48 = this.high >>> 16;
        var a32 = this.high & 0xFFFF;
        var a16 = this.low >>> 16;
        var a00 = this.low & 0xFFFF;

        var b48 = addend.high >>> 16;
        var b32 = addend.high & 0xFFFF;
        var b16 = addend.low >>> 16;
        var b00 = addend.low & 0xFFFF;

        var c48 = 0, c32 = 0, c16 = 0, c00 = 0;
        c00 += a00 + b00;
        c16 += c00 >>> 16;
        c00 &= 0xFFFF;
        c16 += a16 + b16;
        c32 += c16 >>> 16;
        c16 &= 0xFFFF;
        c32 += a32 + b32;
        c48 += c32 >>> 16;
        c32 &= 0xFFFF;
        c48 += a48 + b48;
        c48 &= 0xFFFF;
        return fromBits((c16 << 16) | c00, (c48 << 16) | c32, this.unsigned);
    };

    /**
     * Returns the difference of this and the specified Long.
     * @param {!Long|number|string} subtrahend Subtrahend
     * @returns {!Long} Difference
     */
    LongPrototype.subtract = function subtract(subtrahend) {
        if (!isLong(subtrahend))
            subtrahend = fromValue(subtrahend);
        return this.add(subtrahend.neg());
    };

    /**
     * Returns the difference of this and the specified Long. This is an alias of {@link Long#subtract}.
     * @function
     * @param {!Long|number|string} subtrahend Subtrahend
     * @returns {!Long} Difference
     */
    LongPrototype.sub = LongPrototype.subtract;

    /**
     * Returns the product of this and the specified Long.
     * @param {!Long|number|string} multiplier Multiplier
     * @returns {!Long} Product
     */
    LongPrototype.multiply = function multiply(multiplier) {
        if (this.isZero())
            return ZERO;
        if (!isLong(multiplier))
            multiplier = fromValue(multiplier);
        if (multiplier.isZero())
            return ZERO;
        if (this.eq(MIN_VALUE))
            return multiplier.isOdd() ? MIN_VALUE : ZERO;
        if (multiplier.eq(MIN_VALUE))
            return this.isOdd() ? MIN_VALUE : ZERO;

        if (this.isNegative()) {
            if (multiplier.isNegative())
                return this.neg().mul(multiplier.neg());
            else
                return this.neg().mul(multiplier).neg();
        } else if (multiplier.isNegative())
            return this.mul(multiplier.neg()).neg();

        // If both longs are small, use float multiplication
        if (this.lt(TWO_PWR_24) && multiplier.lt(TWO_PWR_24))
            return fromNumber(this.toNumber() * multiplier.toNumber(), this.unsigned);

        // Divide each long into 4 chunks of 16 bits, and then add up 4x4 products.
        // We can skip products that would overflow.

        var a48 = this.high >>> 16;
        var a32 = this.high & 0xFFFF;
        var a16 = this.low >>> 16;
        var a00 = this.low & 0xFFFF;

        var b48 = multiplier.high >>> 16;
        var b32 = multiplier.high & 0xFFFF;
        var b16 = multiplier.low >>> 16;
        var b00 = multiplier.low & 0xFFFF;

        var c48 = 0, c32 = 0, c16 = 0, c00 = 0;
        c00 += a00 * b00;
        c16 += c00 >>> 16;
        c00 &= 0xFFFF;
        c16 += a16 * b00;
        c32 += c16 >>> 16;
        c16 &= 0xFFFF;
        c16 += a00 * b16;
        c32 += c16 >>> 16;
        c16 &= 0xFFFF;
        c32 += a32 * b00;
        c48 += c32 >>> 16;
        c32 &= 0xFFFF;
        c32 += a16 * b16;
        c48 += c32 >>> 16;
        c32 &= 0xFFFF;
        c32 += a00 * b32;
        c48 += c32 >>> 16;
        c32 &= 0xFFFF;
        c48 += a48 * b00 + a32 * b16 + a16 * b32 + a00 * b48;
        c48 &= 0xFFFF;
        return fromBits((c16 << 16) | c00, (c48 << 16) | c32, this.unsigned);
    };

    /**
     * Returns the product of this and the specified Long. This is an alias of {@link Long#multiply}.
     * @function
     * @param {!Long|number|string} multiplier Multiplier
     * @returns {!Long} Product
     */
    LongPrototype.mul = LongPrototype.multiply;

    /**
     * Returns this Long divided by the specified. The result is signed if this Long is signed or
     *  unsigned if this Long is unsigned.
     * @param {!Long|number|string} divisor Divisor
     * @returns {!Long} Quotient
     */
    LongPrototype.divide = function divide(divisor) {
        if (!isLong(divisor))
            divisor = fromValue(divisor);
        if (divisor.isZero())
            throw Error('division by zero');
        if (this.isZero())
            return this.unsigned ? UZERO : ZERO;
        var approx, rem, res;
        if (!this.unsigned) {
            // This section is only relevant for signed longs and is derived from the
            // closure library as a whole.
            if (this.eq(MIN_VALUE)) {
                if (divisor.eq(ONE) || divisor.eq(NEG_ONE))
                    return MIN_VALUE;  // recall that -MIN_VALUE == MIN_VALUE
                else if (divisor.eq(MIN_VALUE))
                    return ONE;
                else {
                    // At this point, we have |other| >= 2, so |this/other| < |MIN_VALUE|.
                    var halfThis = this.shr(1);
                    approx = halfThis.div(divisor).shl(1);
                    if (approx.eq(ZERO)) {
                        return divisor.isNegative() ? ONE : NEG_ONE;
                    } else {
                        rem = this.sub(divisor.mul(approx));
                        res = approx.add(rem.div(divisor));
                        return res;
                    }
                }
            } else if (divisor.eq(MIN_VALUE))
                return this.unsigned ? UZERO : ZERO;
            if (this.isNegative()) {
                if (divisor.isNegative())
                    return this.neg().div(divisor.neg());
                return this.neg().div(divisor).neg();
            } else if (divisor.isNegative())
                return this.div(divisor.neg()).neg();
            res = ZERO;
        } else {
            // The algorithm below has not been made for unsigned longs. It's therefore
            // required to take special care of the MSB prior to running it.
            if (!divisor.unsigned)
                divisor = divisor.toUnsigned();
            if (divisor.gt(this))
                return UZERO;
            if (divisor.gt(this.shru(1))) // 15 >>> 1 = 7 ; with divisor = 8 ; true
                return UONE;
            res = UZERO;
        }

        // Repeat the following until the remainder is less than other:  find a
        // floating-point that approximates remainder / other *from below*, add this
        // into the result, and subtract it from the remainder.  It is critical that
        // the approximate value is less than or equal to the real value so that the
        // remainder never becomes negative.
        rem = this;
        while (rem.gte(divisor)) {
            // Approximate the result of division. This may be a little greater or
            // smaller than the actual value.
            approx = Math.max(1, Math.floor(rem.toNumber() / divisor.toNumber()));

            // We will tweak the approximate result by changing it in the 48-th digit or
            // the smallest non-fractional digit, whichever is larger.
            var log2 = Math.ceil(Math.log(approx) / Math.LN2),
                delta = (log2 <= 48) ? 1 : pow_dbl(2, log2 - 48),

            // Decrease the approximation until it is smaller than the remainder.  Note
            // that if it is too large, the product overflows and is negative.
                approxRes = fromNumber(approx),
                approxRem = approxRes.mul(divisor);
            while (approxRem.isNegative() || approxRem.gt(rem)) {
                approx -= delta;
                approxRes = fromNumber(approx, this.unsigned);
                approxRem = approxRes.mul(divisor);
            }

            // We know the answer can't be zero... and actually, zero would cause
            // infinite recursion since we would make no progress.
            if (approxRes.isZero())
                approxRes = ONE;

            res = res.add(approxRes);
            rem = rem.sub(approxRem);
        }
        return res;
    };

    /**
     * Returns this Long divided by the specified. This is an alias of {@link Long#divide}.
     * @function
     * @param {!Long|number|string} divisor Divisor
     * @returns {!Long} Quotient
     */
    LongPrototype.div = LongPrototype.divide;

    /**
     * Returns this Long modulo the specified.
     * @param {!Long|number|string} divisor Divisor
     * @returns {!Long} Remainder
     */
    LongPrototype.modulo = function modulo(divisor) {
        if (!isLong(divisor))
            divisor = fromValue(divisor);
        return this.sub(this.div(divisor).mul(divisor));
    };

    /**
     * Returns this Long modulo the specified. This is an alias of {@link Long#modulo}.
     * @function
     * @param {!Long|number|string} divisor Divisor
     * @returns {!Long} Remainder
     */
    LongPrototype.mod = LongPrototype.modulo;

    /**
     * Returns the bitwise NOT of this Long.
     * @returns {!Long}
     */
    LongPrototype.not = function not() {
        return fromBits(~this.low, ~this.high, this.unsigned);
    };

    /**
     * Returns the bitwise AND of this Long and the specified.
     * @param {!Long|number|string} other Other Long
     * @returns {!Long}
     */
    LongPrototype.and = function and(other) {
        if (!isLong(other))
            other = fromValue(other);
        return fromBits(this.low & other.low, this.high & other.high, this.unsigned);
    };

    /**
     * Returns the bitwise OR of this Long and the specified.
     * @param {!Long|number|string} other Other Long
     * @returns {!Long}
     */
    LongPrototype.or = function or(other) {
        if (!isLong(other))
            other = fromValue(other);
        return fromBits(this.low | other.low, this.high | other.high, this.unsigned);
    };

    /**
     * Returns the bitwise XOR of this Long and the given one.
     * @param {!Long|number|string} other Other Long
     * @returns {!Long}
     */
    LongPrototype.xor = function xor(other) {
        if (!isLong(other))
            other = fromValue(other);
        return fromBits(this.low ^ other.low, this.high ^ other.high, this.unsigned);
    };

    /**
     * Returns this Long with bits shifted to the left by the given amount.
     * @param {number|!Long} numBits Number of bits
     * @returns {!Long} Shifted Long
     */
    LongPrototype.shiftLeft = function shiftLeft(numBits) {
        if (isLong(numBits))
            numBits = numBits.toInt();
        if ((numBits &= 63) === 0)
            return this;
        else if (numBits < 32)
            return fromBits(this.low << numBits, (this.high << numBits) | (this.low >>> (32 - numBits)), this.unsigned);
        else
            return fromBits(0, this.low << (numBits - 32), this.unsigned);
    };

    /**
     * Returns this Long with bits shifted to the left by the given amount. This is an alias of {@link Long#shiftLeft}.
     * @function
     * @param {number|!Long} numBits Number of bits
     * @returns {!Long} Shifted Long
     */
    LongPrototype.shl = LongPrototype.shiftLeft;

    /**
     * Returns this Long with bits arithmetically shifted to the right by the given amount.
     * @param {number|!Long} numBits Number of bits
     * @returns {!Long} Shifted Long
     */
    LongPrototype.shiftRight = function shiftRight(numBits) {
        if (isLong(numBits))
            numBits = numBits.toInt();
        if ((numBits &= 63) === 0)
            return this;
        else if (numBits < 32)
            return fromBits((this.low >>> numBits) | (this.high << (32 - numBits)), this.high >> numBits, this.unsigned);
        else
            return fromBits(this.high >> (numBits - 32), this.high >= 0 ? 0 : -1, this.unsigned);
    };

    /**
     * Returns this Long with bits arithmetically shifted to the right by the given amount. This is an alias of {@link Long#shiftRight}.
     * @function
     * @param {number|!Long} numBits Number of bits
     * @returns {!Long} Shifted Long
     */
    LongPrototype.shr = LongPrototype.shiftRight;

    /**
     * Returns this Long with bits logically shifted to the right by the given amount.
     * @param {number|!Long} numBits Number of bits
     * @returns {!Long} Shifted Long
     */
    LongPrototype.shiftRightUnsigned = function shiftRightUnsigned(numBits) {
        if (isLong(numBits))
            numBits = numBits.toInt();
        numBits &= 63;
        if (numBits === 0)
            return this;
        else {
            var high = this.high;
            if (numBits < 32) {
                var low = this.low;
                return fromBits((low >>> numBits) | (high << (32 - numBits)), high >>> numBits, this.unsigned);
            } else if (numBits === 32)
                return fromBits(high, 0, this.unsigned);
            else
                return fromBits(high >>> (numBits - 32), 0, this.unsigned);
        }
    };

    /**
     * Returns this Long with bits logically shifted to the right by the given amount. This is an alias of {@link Long#shiftRightUnsigned}.
     * @function
     * @param {number|!Long} numBits Number of bits
     * @returns {!Long} Shifted Long
     */
    LongPrototype.shru = LongPrototype.shiftRightUnsigned;

    /**
     * Converts this Long to signed.
     * @returns {!Long} Signed long
     */
    LongPrototype.toSigned = function toSigned() {
        if (!this.unsigned)
            return this;
        return fromBits(this.low, this.high, false);
    };

    /**
     * Converts this Long to unsigned.
     * @returns {!Long} Unsigned long
     */
    LongPrototype.toUnsigned = function toUnsigned() {
        if (this.unsigned)
            return this;
        return fromBits(this.low, this.high, true);
    };

    /**
     * Converts this Long to its byte representation.
     * @param {boolean=} le Whether little or big endian, defaults to big endian
     * @returns {!Array.<number>} Byte representation
     */
    LongPrototype.toBytes = function(le) {
        return le ? this.toBytesLE() : this.toBytesBE();
    }

    /**
     * Converts this Long to its little endian byte representation.
     * @returns {!Array.<number>} Little endian byte representation
     */
    LongPrototype.toBytesLE = function() {
        var hi = this.high,
            lo = this.low;
        return [
             lo         & 0xff,
            (lo >>>  8) & 0xff,
            (lo >>> 16) & 0xff,
            (lo >>> 24) & 0xff,
             hi         & 0xff,
            (hi >>>  8) & 0xff,
            (hi >>> 16) & 0xff,
            (hi >>> 24) & 0xff
        ];
    }

    /**
     * Converts this Long to its big endian byte representation.
     * @returns {!Array.<number>} Big endian byte representation
     */
    LongPrototype.toBytesBE = function() {
        var hi = this.high,
            lo = this.low;
        return [
            (hi >>> 24) & 0xff,
            (hi >>> 16) & 0xff,
            (hi >>>  8) & 0xff,
             hi         & 0xff,
            (lo >>> 24) & 0xff,
            (lo >>> 16) & 0xff,
            (lo >>>  8) & 0xff,
             lo         & 0xff
        ];
    }

    return Long;
});

},{}],35:[function(require,module,exports){
(function (process){
'use strict';

if (!process.version ||
    process.version.indexOf('v0.') === 0 ||
    process.version.indexOf('v1.') === 0 && process.version.indexOf('v1.8.') !== 0) {
  module.exports = { nextTick: nextTick };
} else {
  module.exports = process
}

function nextTick(fn, arg1, arg2, arg3) {
  if (typeof fn !== 'function') {
    throw new TypeError('"callback" argument must be a function');
  }
  var len = arguments.length;
  var args, i;
  switch (len) {
  case 0:
  case 1:
    return process.nextTick(fn);
  case 2:
    return process.nextTick(function afterTickOne() {
      fn.call(null, arg1);
    });
  case 3:
    return process.nextTick(function afterTickTwo() {
      fn.call(null, arg1, arg2);
    });
  case 4:
    return process.nextTick(function afterTickThree() {
      fn.call(null, arg1, arg2, arg3);
    });
  default:
    args = new Array(len - 1);
    i = 0;
    while (i < args.length) {
      args[i++] = arguments[i];
    }
    return process.nextTick(function afterTick() {
      fn.apply(null, args);
    });
  }
}


}).call(this,require('_process'))
},{"_process":36}],36:[function(require,module,exports){
// shim for using process in browser
var process = module.exports = {};

// cached from whatever global is present so that test runners that stub it
// don't break things.  But we need to wrap it in a try catch in case it is
// wrapped in strict mode code which doesn't define any globals.  It's inside a
// function because try/catches deoptimize in certain engines.

var cachedSetTimeout;
var cachedClearTimeout;

function defaultSetTimout() {
    throw new Error('setTimeout has not been defined');
}
function defaultClearTimeout () {
    throw new Error('clearTimeout has not been defined');
}
(function () {
    try {
        if (typeof setTimeout === 'function') {
            cachedSetTimeout = setTimeout;
        } else {
            cachedSetTimeout = defaultSetTimout;
        }
    } catch (e) {
        cachedSetTimeout = defaultSetTimout;
    }
    try {
        if (typeof clearTimeout === 'function') {
            cachedClearTimeout = clearTimeout;
        } else {
            cachedClearTimeout = defaultClearTimeout;
        }
    } catch (e) {
        cachedClearTimeout = defaultClearTimeout;
    }
} ())
function runTimeout(fun) {
    if (cachedSetTimeout === setTimeout) {
        //normal enviroments in sane situations
        return setTimeout(fun, 0);
    }
    // if setTimeout wasn't available but was latter defined
    if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {
        cachedSetTimeout = setTimeout;
        return setTimeout(fun, 0);
    }
    try {
        // when when somebody has screwed with setTimeout but no I.E. maddness
        return cachedSetTimeout(fun, 0);
    } catch(e){
        try {
            // When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
            return cachedSetTimeout.call(null, fun, 0);
        } catch(e){
            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error
            return cachedSetTimeout.call(this, fun, 0);
        }
    }


}
function runClearTimeout(marker) {
    if (cachedClearTimeout === clearTimeout) {
        //normal enviroments in sane situations
        return clearTimeout(marker);
    }
    // if clearTimeout wasn't available but was latter defined
    if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {
        cachedClearTimeout = clearTimeout;
        return clearTimeout(marker);
    }
    try {
        // when when somebody has screwed with setTimeout but no I.E. maddness
        return cachedClearTimeout(marker);
    } catch (e){
        try {
            // When we are in I.E. but the script has been evaled so I.E. doesn't  trust the global object when called normally
            return cachedClearTimeout.call(null, marker);
        } catch (e){
            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.
            // Some versions of I.E. have different rules for clearTimeout vs setTimeout
            return cachedClearTimeout.call(this, marker);
        }
    }



}
var queue = [];
var draining = false;
var currentQueue;
var queueIndex = -1;

function cleanUpNextTick() {
    if (!draining || !currentQueue) {
        return;
    }
    draining = false;
    if (currentQueue.length) {
        queue = currentQueue.concat(queue);
    } else {
        queueIndex = -1;
    }
    if (queue.length) {
        drainQueue();
    }
}

function drainQueue() {
    if (draining) {
        return;
    }
    var timeout = runTimeout(cleanUpNextTick);
    draining = true;

    var len = queue.length;
    while(len) {
        currentQueue = queue;
        queue = [];
        while (++queueIndex < len) {
            if (currentQueue) {
                currentQueue[queueIndex].run();
            }
        }
        queueIndex = -1;
        len = queue.length;
    }
    currentQueue = null;
    draining = false;
    runClearTimeout(timeout);
}

process.nextTick = function (fun) {
    var args = new Array(arguments.length - 1);
    if (arguments.length > 1) {
        for (var i = 1; i < arguments.length; i++) {
            args[i - 1] = arguments[i];
        }
    }
    queue.push(new Item(fun, args));
    if (queue.length === 1 && !draining) {
        runTimeout(drainQueue);
    }
};

// v8 likes predictible objects
function Item(fun, array) {
    this.fun = fun;
    this.array = array;
}
Item.prototype.run = function () {
    this.fun.apply(null, this.array);
};
process.title = 'browser';
process.browser = true;
process.env = {};
process.argv = [];
process.version = ''; // empty string to avoid regexp issues
process.versions = {};

function noop() {}

process.on = noop;
process.addListener = noop;
process.once = noop;
process.off = noop;
process.removeListener = noop;
process.removeAllListeners = noop;
process.emit = noop;
process.prependListener = noop;
process.prependOnceListener = noop;

process.listeners = function (name) { return [] }

process.binding = function (name) {
    throw new Error('process.binding is not supported');
};

process.cwd = function () { return '/' };
process.chdir = function (dir) {
    throw new Error('process.chdir is not supported');
};
process.umask = function() { return 0; };

},{}],37:[function(require,module,exports){
module.exports = require('./lib/_stream_duplex.js');

},{"./lib/_stream_duplex.js":38}],38:[function(require,module,exports){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

// a duplex stream is just a stream that is both readable and writable.
// Since JS doesn't have multiple prototypal inheritance, this class
// prototypally inherits from Readable, and then parasitically from
// Writable.

'use strict';

/*<replacement>*/

var pna = require('process-nextick-args');
/*</replacement>*/

/*<replacement>*/
var objectKeys = Object.keys || function (obj) {
  var keys = [];
  for (var key in obj) {
    keys.push(key);
  }return keys;
};
/*</replacement>*/

module.exports = Duplex;

/*<replacement>*/
var util = require('core-util-is');
util.inherits = require('inherits');
/*</replacement>*/

var Readable = require('./_stream_readable');
var Writable = require('./_stream_writable');

util.inherits(Duplex, Readable);

var keys = objectKeys(Writable.prototype);
for (var v = 0; v < keys.length; v++) {
  var method = keys[v];
  if (!Duplex.prototype[method]) Duplex.prototype[method] = Writable.prototype[method];
}

function Duplex(options) {
  if (!(this instanceof Duplex)) return new Duplex(options);

  Readable.call(this, options);
  Writable.call(this, options);

  if (options && options.readable === false) this.readable = false;

  if (options && options.writable === false) this.writable = false;

  this.allowHalfOpen = true;
  if (options && options.allowHalfOpen === false) this.allowHalfOpen = false;

  this.once('end', onend);
}

// the no-half-open enforcer
function onend() {
  // if we allow half-open state, or if the writable side ended,
  // then we're ok.
  if (this.allowHalfOpen || this._writableState.ended) return;

  // no more data can be written.
  // But allow more writes to happen in this tick.
  pna.nextTick(onEndNT, this);
}

function onEndNT(self) {
  self.end();
}

Object.defineProperty(Duplex.prototype, 'destroyed', {
  get: function () {
    if (this._readableState === undefined || this._writableState === undefined) {
      return false;
    }
    return this._readableState.destroyed && this._writableState.destroyed;
  },
  set: function (value) {
    // we ignore the value if the stream
    // has not been initialized yet
    if (this._readableState === undefined || this._writableState === undefined) {
      return;
    }

    // backward compatibility, the user is explicitly
    // managing destroyed
    this._readableState.destroyed = value;
    this._writableState.destroyed = value;
  }
});

Duplex.prototype._destroy = function (err, cb) {
  this.push(null);
  this.end();

  pna.nextTick(cb, err);
};

function forEach(xs, f) {
  for (var i = 0, l = xs.length; i < l; i++) {
    f(xs[i], i);
  }
}
},{"./_stream_readable":40,"./_stream_writable":42,"core-util-is":26,"inherits":31,"process-nextick-args":35}],39:[function(require,module,exports){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

// a passthrough stream.
// basically just the most minimal sort of Transform stream.
// Every written chunk gets output as-is.

'use strict';

module.exports = PassThrough;

var Transform = require('./_stream_transform');

/*<replacement>*/
var util = require('core-util-is');
util.inherits = require('inherits');
/*</replacement>*/

util.inherits(PassThrough, Transform);

function PassThrough(options) {
  if (!(this instanceof PassThrough)) return new PassThrough(options);

  Transform.call(this, options);
}

PassThrough.prototype._transform = function (chunk, encoding, cb) {
  cb(null, chunk);
};
},{"./_stream_transform":41,"core-util-is":26,"inherits":31}],40:[function(require,module,exports){
(function (process,global){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

'use strict';

/*<replacement>*/

var pna = require('process-nextick-args');
/*</replacement>*/

module.exports = Readable;

/*<replacement>*/
var isArray = require('isarray');
/*</replacement>*/

/*<replacement>*/
var Duplex;
/*</replacement>*/

Readable.ReadableState = ReadableState;

/*<replacement>*/
var EE = require('events').EventEmitter;

var EElistenerCount = function (emitter, type) {
  return emitter.listeners(type).length;
};
/*</replacement>*/

/*<replacement>*/
var Stream = require('./internal/streams/stream');
/*</replacement>*/

/*<replacement>*/

var Buffer = require('safe-buffer').Buffer;
var OurUint8Array = global.Uint8Array || function () {};
function _uint8ArrayToBuffer(chunk) {
  return Buffer.from(chunk);
}
function _isUint8Array(obj) {
  return Buffer.isBuffer(obj) || obj instanceof OurUint8Array;
}

/*</replacement>*/

/*<replacement>*/
var util = require('core-util-is');
util.inherits = require('inherits');
/*</replacement>*/

/*<replacement>*/
var debugUtil = require('util');
var debug = void 0;
if (debugUtil && debugUtil.debuglog) {
  debug = debugUtil.debuglog('stream');
} else {
  debug = function () {};
}
/*</replacement>*/

var BufferList = require('./internal/streams/BufferList');
var destroyImpl = require('./internal/streams/destroy');
var StringDecoder;

util.inherits(Readable, Stream);

var kProxyEvents = ['error', 'close', 'destroy', 'pause', 'resume'];

function prependListener(emitter, event, fn) {
  // Sadly this is not cacheable as some libraries bundle their own
  // event emitter implementation with them.
  if (typeof emitter.prependListener === 'function') return emitter.prependListener(event, fn);

  // This is a hack to make sure that our error handler is attached before any
  // userland ones.  NEVER DO THIS. This is here only because this code needs
  // to continue to work with older versions of Node.js that do not include
  // the prependListener() method. The goal is to eventually remove this hack.
  if (!emitter._events || !emitter._events[event]) emitter.on(event, fn);else if (isArray(emitter._events[event])) emitter._events[event].unshift(fn);else emitter._events[event] = [fn, emitter._events[event]];
}

function ReadableState(options, stream) {
  Duplex = Duplex || require('./_stream_duplex');

  options = options || {};

  // Duplex streams are both readable and writable, but share
  // the same options object.
  // However, some cases require setting options to different
  // values for the readable and the writable sides of the duplex stream.
  // These options can be provided separately as readableXXX and writableXXX.
  var isDuplex = stream instanceof Duplex;

  // object stream flag. Used to make read(n) ignore n and to
  // make all the buffer merging and length checks go away
  this.objectMode = !!options.objectMode;

  if (isDuplex) this.objectMode = this.objectMode || !!options.readableObjectMode;

  // the point at which it stops calling _read() to fill the buffer
  // Note: 0 is a valid value, means "don't call _read preemptively ever"
  var hwm = options.highWaterMark;
  var readableHwm = options.readableHighWaterMark;
  var defaultHwm = this.objectMode ? 16 : 16 * 1024;

  if (hwm || hwm === 0) this.highWaterMark = hwm;else if (isDuplex && (readableHwm || readableHwm === 0)) this.highWaterMark = readableHwm;else this.highWaterMark = defaultHwm;

  // cast to ints.
  this.highWaterMark = Math.floor(this.highWaterMark);

  // A linked list is used to store data chunks instead of an array because the
  // linked list can remove elements from the beginning faster than
  // array.shift()
  this.buffer = new BufferList();
  this.length = 0;
  this.pipes = null;
  this.pipesCount = 0;
  this.flowing = null;
  this.ended = false;
  this.endEmitted = false;
  this.reading = false;

  // a flag to be able to tell if the event 'readable'/'data' is emitted
  // immediately, or on a later tick.  We set this to true at first, because
  // any actions that shouldn't happen until "later" should generally also
  // not happen before the first read call.
  this.sync = true;

  // whenever we return null, then we set a flag to say
  // that we're awaiting a 'readable' event emission.
  this.needReadable = false;
  this.emittedReadable = false;
  this.readableListening = false;
  this.resumeScheduled = false;

  // has it been destroyed
  this.destroyed = false;

  // Crypto is kind of old and crusty.  Historically, its default string
  // encoding is 'binary' so we have to make this configurable.
  // Everything else in the universe uses 'utf8', though.
  this.defaultEncoding = options.defaultEncoding || 'utf8';

  // the number of writers that are awaiting a drain event in .pipe()s
  this.awaitDrain = 0;

  // if true, a maybeReadMore has been scheduled
  this.readingMore = false;

  this.decoder = null;
  this.encoding = null;
  if (options.encoding) {
    if (!StringDecoder) StringDecoder = require('string_decoder/').StringDecoder;
    this.decoder = new StringDecoder(options.encoding);
    this.encoding = options.encoding;
  }
}

function Readable(options) {
  Duplex = Duplex || require('./_stream_duplex');

  if (!(this instanceof Readable)) return new Readable(options);

  this._readableState = new ReadableState(options, this);

  // legacy
  this.readable = true;

  if (options) {
    if (typeof options.read === 'function') this._read = options.read;

    if (typeof options.destroy === 'function') this._destroy = options.destroy;
  }

  Stream.call(this);
}

Object.defineProperty(Readable.prototype, 'destroyed', {
  get: function () {
    if (this._readableState === undefined) {
      return false;
    }
    return this._readableState.destroyed;
  },
  set: function (value) {
    // we ignore the value if the stream
    // has not been initialized yet
    if (!this._readableState) {
      return;
    }

    // backward compatibility, the user is explicitly
    // managing destroyed
    this._readableState.destroyed = value;
  }
});

Readable.prototype.destroy = destroyImpl.destroy;
Readable.prototype._undestroy = destroyImpl.undestroy;
Readable.prototype._destroy = function (err, cb) {
  this.push(null);
  cb(err);
};

// Manually shove something into the read() buffer.
// This returns true if the highWaterMark has not been hit yet,
// similar to how Writable.write() returns true if you should
// write() some more.
Readable.prototype.push = function (chunk, encoding) {
  var state = this._readableState;
  var skipChunkCheck;

  if (!state.objectMode) {
    if (typeof chunk === 'string') {
      encoding = encoding || state.defaultEncoding;
      if (encoding !== state.encoding) {
        chunk = Buffer.from(chunk, encoding);
        encoding = '';
      }
      skipChunkCheck = true;
    }
  } else {
    skipChunkCheck = true;
  }

  return readableAddChunk(this, chunk, encoding, false, skipChunkCheck);
};

// Unshift should *always* be something directly out of read()
Readable.prototype.unshift = function (chunk) {
  return readableAddChunk(this, chunk, null, true, false);
};

function readableAddChunk(stream, chunk, encoding, addToFront, skipChunkCheck) {
  var state = stream._readableState;
  if (chunk === null) {
    state.reading = false;
    onEofChunk(stream, state);
  } else {
    var er;
    if (!skipChunkCheck) er = chunkInvalid(state, chunk);
    if (er) {
      stream.emit('error', er);
    } else if (state.objectMode || chunk && chunk.length > 0) {
      if (typeof chunk !== 'string' && !state.objectMode && Object.getPrototypeOf(chunk) !== Buffer.prototype) {
        chunk = _uint8ArrayToBuffer(chunk);
      }

      if (addToFront) {
        if (state.endEmitted) stream.emit('error', new Error('stream.unshift() after end event'));else addChunk(stream, state, chunk, true);
      } else if (state.ended) {
        stream.emit('error', new Error('stream.push() after EOF'));
      } else {
        state.reading = false;
        if (state.decoder && !encoding) {
          chunk = state.decoder.write(chunk);
          if (state.objectMode || chunk.length !== 0) addChunk(stream, state, chunk, false);else maybeReadMore(stream, state);
        } else {
          addChunk(stream, state, chunk, false);
        }
      }
    } else if (!addToFront) {
      state.reading = false;
    }
  }

  return needMoreData(state);
}

function addChunk(stream, state, chunk, addToFront) {
  if (state.flowing && state.length === 0 && !state.sync) {
    stream.emit('data', chunk);
    stream.read(0);
  } else {
    // update the buffer info.
    state.length += state.objectMode ? 1 : chunk.length;
    if (addToFront) state.buffer.unshift(chunk);else state.buffer.push(chunk);

    if (state.needReadable) emitReadable(stream);
  }
  maybeReadMore(stream, state);
}

function chunkInvalid(state, chunk) {
  var er;
  if (!_isUint8Array(chunk) && typeof chunk !== 'string' && chunk !== undefined && !state.objectMode) {
    er = new TypeError('Invalid non-string/buffer chunk');
  }
  return er;
}

// if it's past the high water mark, we can push in some more.
// Also, if we have no data yet, we can stand some
// more bytes.  This is to work around cases where hwm=0,
// such as the repl.  Also, if the push() triggered a
// readable event, and the user called read(largeNumber) such that
// needReadable was set, then we ought to push more, so that another
// 'readable' event will be triggered.
function needMoreData(state) {
  return !state.ended && (state.needReadable || state.length < state.highWaterMark || state.length === 0);
}

Readable.prototype.isPaused = function () {
  return this._readableState.flowing === false;
};

// backwards compatibility.
Readable.prototype.setEncoding = function (enc) {
  if (!StringDecoder) StringDecoder = require('string_decoder/').StringDecoder;
  this._readableState.decoder = new StringDecoder(enc);
  this._readableState.encoding = enc;
  return this;
};

// Don't raise the hwm > 8MB
var MAX_HWM = 0x800000;
function computeNewHighWaterMark(n) {
  if (n >= MAX_HWM) {
    n = MAX_HWM;
  } else {
    // Get the next highest power of 2 to prevent increasing hwm excessively in
    // tiny amounts
    n--;
    n |= n >>> 1;
    n |= n >>> 2;
    n |= n >>> 4;
    n |= n >>> 8;
    n |= n >>> 16;
    n++;
  }
  return n;
}

// This function is designed to be inlinable, so please take care when making
// changes to the function body.
function howMuchToRead(n, state) {
  if (n <= 0 || state.length === 0 && state.ended) return 0;
  if (state.objectMode) return 1;
  if (n !== n) {
    // Only flow one buffer at a time
    if (state.flowing && state.length) return state.buffer.head.data.length;else return state.length;
  }
  // If we're asking for more than the current hwm, then raise the hwm.
  if (n > state.highWaterMark) state.highWaterMark = computeNewHighWaterMark(n);
  if (n <= state.length) return n;
  // Don't have enough
  if (!state.ended) {
    state.needReadable = true;
    return 0;
  }
  return state.length;
}

// you can override either this method, or the async _read(n) below.
Readable.prototype.read = function (n) {
  debug('read', n);
  n = parseInt(n, 10);
  var state = this._readableState;
  var nOrig = n;

  if (n !== 0) state.emittedReadable = false;

  // if we're doing read(0) to trigger a readable event, but we
  // already have a bunch of data in the buffer, then just trigger
  // the 'readable' event and move on.
  if (n === 0 && state.needReadable && (state.length >= state.highWaterMark || state.ended)) {
    debug('read: emitReadable', state.length, state.ended);
    if (state.length === 0 && state.ended) endReadable(this);else emitReadable(this);
    return null;
  }

  n = howMuchToRead(n, state);

  // if we've ended, and we're now clear, then finish it up.
  if (n === 0 && state.ended) {
    if (state.length === 0) endReadable(this);
    return null;
  }

  // All the actual chunk generation logic needs to be
  // *below* the call to _read.  The reason is that in certain
  // synthetic stream cases, such as passthrough streams, _read
  // may be a completely synchronous operation which may change
  // the state of the read buffer, providing enough data when
  // before there was *not* enough.
  //
  // So, the steps are:
  // 1. Figure out what the state of things will be after we do
  // a read from the buffer.
  //
  // 2. If that resulting state will trigger a _read, then call _read.
  // Note that this may be asynchronous, or synchronous.  Yes, it is
  // deeply ugly to write APIs this way, but that still doesn't mean
  // that the Readable class should behave improperly, as streams are
  // designed to be sync/async agnostic.
  // Take note if the _read call is sync or async (ie, if the read call
  // has returned yet), so that we know whether or not it's safe to emit
  // 'readable' etc.
  //
  // 3. Actually pull the requested chunks out of the buffer and return.

  // if we need a readable event, then we need to do some reading.
  var doRead = state.needReadable;
  debug('need readable', doRead);

  // if we currently have less than the highWaterMark, then also read some
  if (state.length === 0 || state.length - n < state.highWaterMark) {
    doRead = true;
    debug('length less than watermark', doRead);
  }

  // however, if we've ended, then there's no point, and if we're already
  // reading, then it's unnecessary.
  if (state.ended || state.reading) {
    doRead = false;
    debug('reading or ended', doRead);
  } else if (doRead) {
    debug('do read');
    state.reading = true;
    state.sync = true;
    // if the length is currently zero, then we *need* a readable event.
    if (state.length === 0) state.needReadable = true;
    // call internal read method
    this._read(state.highWaterMark);
    state.sync = false;
    // If _read pushed data synchronously, then `reading` will be false,
    // and we need to re-evaluate how much data we can return to the user.
    if (!state.reading) n = howMuchToRead(nOrig, state);
  }

  var ret;
  if (n > 0) ret = fromList(n, state);else ret = null;

  if (ret === null) {
    state.needReadable = true;
    n = 0;
  } else {
    state.length -= n;
  }

  if (state.length === 0) {
    // If we have nothing in the buffer, then we want to know
    // as soon as we *do* get something into the buffer.
    if (!state.ended) state.needReadable = true;

    // If we tried to read() past the EOF, then emit end on the next tick.
    if (nOrig !== n && state.ended) endReadable(this);
  }

  if (ret !== null) this.emit('data', ret);

  return ret;
};

function onEofChunk(stream, state) {
  if (state.ended) return;
  if (state.decoder) {
    var chunk = state.decoder.end();
    if (chunk && chunk.length) {
      state.buffer.push(chunk);
      state.length += state.objectMode ? 1 : chunk.length;
    }
  }
  state.ended = true;

  // emit 'readable' now to make sure it gets picked up.
  emitReadable(stream);
}

// Don't emit readable right away in sync mode, because this can trigger
// another read() call => stack overflow.  This way, it might trigger
// a nextTick recursion warning, but that's not so bad.
function emitReadable(stream) {
  var state = stream._readableState;
  state.needReadable = false;
  if (!state.emittedReadable) {
    debug('emitReadable', state.flowing);
    state.emittedReadable = true;
    if (state.sync) pna.nextTick(emitReadable_, stream);else emitReadable_(stream);
  }
}

function emitReadable_(stream) {
  debug('emit readable');
  stream.emit('readable');
  flow(stream);
}

// at this point, the user has presumably seen the 'readable' event,
// and called read() to consume some data.  that may have triggered
// in turn another _read(n) call, in which case reading = true if
// it's in progress.
// However, if we're not ended, or reading, and the length < hwm,
// then go ahead and try to read some more preemptively.
function maybeReadMore(stream, state) {
  if (!state.readingMore) {
    state.readingMore = true;
    pna.nextTick(maybeReadMore_, stream, state);
  }
}

function maybeReadMore_(stream, state) {
  var len = state.length;
  while (!state.reading && !state.flowing && !state.ended && state.length < state.highWaterMark) {
    debug('maybeReadMore read 0');
    stream.read(0);
    if (len === state.length)
      // didn't get any data, stop spinning.
      break;else len = state.length;
  }
  state.readingMore = false;
}

// abstract method.  to be overridden in specific implementation classes.
// call cb(er, data) where data is <= n in length.
// for virtual (non-string, non-buffer) streams, "length" is somewhat
// arbitrary, and perhaps not very meaningful.
Readable.prototype._read = function (n) {
  this.emit('error', new Error('_read() is not implemented'));
};

Readable.prototype.pipe = function (dest, pipeOpts) {
  var src = this;
  var state = this._readableState;

  switch (state.pipesCount) {
    case 0:
      state.pipes = dest;
      break;
    case 1:
      state.pipes = [state.pipes, dest];
      break;
    default:
      state.pipes.push(dest);
      break;
  }
  state.pipesCount += 1;
  debug('pipe count=%d opts=%j', state.pipesCount, pipeOpts);

  var doEnd = (!pipeOpts || pipeOpts.end !== false) && dest !== process.stdout && dest !== process.stderr;

  var endFn = doEnd ? onend : unpipe;
  if (state.endEmitted) pna.nextTick(endFn);else src.once('end', endFn);

  dest.on('unpipe', onunpipe);
  function onunpipe(readable, unpipeInfo) {
    debug('onunpipe');
    if (readable === src) {
      if (unpipeInfo && unpipeInfo.hasUnpiped === false) {
        unpipeInfo.hasUnpiped = true;
        cleanup();
      }
    }
  }

  function onend() {
    debug('onend');
    dest.end();
  }

  // when the dest drains, it reduces the awaitDrain counter
  // on the source.  This would be more elegant with a .once()
  // handler in flow(), but adding and removing repeatedly is
  // too slow.
  var ondrain = pipeOnDrain(src);
  dest.on('drain', ondrain);

  var cleanedUp = false;
  function cleanup() {
    debug('cleanup');
    // cleanup event handlers once the pipe is broken
    dest.removeListener('close', onclose);
    dest.removeListener('finish', onfinish);
    dest.removeListener('drain', ondrain);
    dest.removeListener('error', onerror);
    dest.removeListener('unpipe', onunpipe);
    src.removeListener('end', onend);
    src.removeListener('end', unpipe);
    src.removeListener('data', ondata);

    cleanedUp = true;

    // if the reader is waiting for a drain event from this
    // specific writer, then it would cause it to never start
    // flowing again.
    // So, if this is awaiting a drain, then we just call it now.
    // If we don't know, then assume that we are waiting for one.
    if (state.awaitDrain && (!dest._writableState || dest._writableState.needDrain)) ondrain();
  }

  // If the user pushes more data while we're writing to dest then we'll end up
  // in ondata again. However, we only want to increase awaitDrain once because
  // dest will only emit one 'drain' event for the multiple writes.
  // => Introduce a guard on increasing awaitDrain.
  var increasedAwaitDrain = false;
  src.on('data', ondata);
  function ondata(chunk) {
    debug('ondata');
    increasedAwaitDrain = false;
    var ret = dest.write(chunk);
    if (false === ret && !increasedAwaitDrain) {
      // If the user unpiped during `dest.write()`, it is possible
      // to get stuck in a permanently paused state if that write
      // also returned false.
      // => Check whether `dest` is still a piping destination.
      if ((state.pipesCount === 1 && state.pipes === dest || state.pipesCount > 1 && indexOf(state.pipes, dest) !== -1) && !cleanedUp) {
        debug('false write response, pause', src._readableState.awaitDrain);
        src._readableState.awaitDrain++;
        increasedAwaitDrain = true;
      }
      src.pause();
    }
  }

  // if the dest has an error, then stop piping into it.
  // however, don't suppress the throwing behavior for this.
  function onerror(er) {
    debug('onerror', er);
    unpipe();
    dest.removeListener('error', onerror);
    if (EElistenerCount(dest, 'error') === 0) dest.emit('error', er);
  }

  // Make sure our error handler is attached before userland ones.
  prependListener(dest, 'error', onerror);

  // Both close and finish should trigger unpipe, but only once.
  function onclose() {
    dest.removeListener('finish', onfinish);
    unpipe();
  }
  dest.once('close', onclose);
  function onfinish() {
    debug('onfinish');
    dest.removeListener('close', onclose);
    unpipe();
  }
  dest.once('finish', onfinish);

  function unpipe() {
    debug('unpipe');
    src.unpipe(dest);
  }

  // tell the dest that it's being piped to
  dest.emit('pipe', src);

  // start the flow if it hasn't been started already.
  if (!state.flowing) {
    debug('pipe resume');
    src.resume();
  }

  return dest;
};

function pipeOnDrain(src) {
  return function () {
    var state = src._readableState;
    debug('pipeOnDrain', state.awaitDrain);
    if (state.awaitDrain) state.awaitDrain--;
    if (state.awaitDrain === 0 && EElistenerCount(src, 'data')) {
      state.flowing = true;
      flow(src);
    }
  };
}

Readable.prototype.unpipe = function (dest) {
  var state = this._readableState;
  var unpipeInfo = { hasUnpiped: false };

  // if we're not piping anywhere, then do nothing.
  if (state.pipesCount === 0) return this;

  // just one destination.  most common case.
  if (state.pipesCount === 1) {
    // passed in one, but it's not the right one.
    if (dest && dest !== state.pipes) return this;

    if (!dest) dest = state.pipes;

    // got a match.
    state.pipes = null;
    state.pipesCount = 0;
    state.flowing = false;
    if (dest) dest.emit('unpipe', this, unpipeInfo);
    return this;
  }

  // slow case. multiple pipe destinations.

  if (!dest) {
    // remove all.
    var dests = state.pipes;
    var len = state.pipesCount;
    state.pipes = null;
    state.pipesCount = 0;
    state.flowing = false;

    for (var i = 0; i < len; i++) {
      dests[i].emit('unpipe', this, unpipeInfo);
    }return this;
  }

  // try to find the right one.
  var index = indexOf(state.pipes, dest);
  if (index === -1) return this;

  state.pipes.splice(index, 1);
  state.pipesCount -= 1;
  if (state.pipesCount === 1) state.pipes = state.pipes[0];

  dest.emit('unpipe', this, unpipeInfo);

  return this;
};

// set up data events if they are asked for
// Ensure readable listeners eventually get something
Readable.prototype.on = function (ev, fn) {
  var res = Stream.prototype.on.call(this, ev, fn);

  if (ev === 'data') {
    // Start flowing on next tick if stream isn't explicitly paused
    if (this._readableState.flowing !== false) this.resume();
  } else if (ev === 'readable') {
    var state = this._readableState;
    if (!state.endEmitted && !state.readableListening) {
      state.readableListening = state.needReadable = true;
      state.emittedReadable = false;
      if (!state.reading) {
        pna.nextTick(nReadingNextTick, this);
      } else if (state.length) {
        emitReadable(this);
      }
    }
  }

  return res;
};
Readable.prototype.addListener = Readable.prototype.on;

function nReadingNextTick(self) {
  debug('readable nexttick read 0');
  self.read(0);
}

// pause() and resume() are remnants of the legacy readable stream API
// If the user uses them, then switch into old mode.
Readable.prototype.resume = function () {
  var state = this._readableState;
  if (!state.flowing) {
    debug('resume');
    state.flowing = true;
    resume(this, state);
  }
  return this;
};

function resume(stream, state) {
  if (!state.resumeScheduled) {
    state.resumeScheduled = true;
    pna.nextTick(resume_, stream, state);
  }
}

function resume_(stream, state) {
  if (!state.reading) {
    debug('resume read 0');
    stream.read(0);
  }

  state.resumeScheduled = false;
  state.awaitDrain = 0;
  stream.emit('resume');
  flow(stream);
  if (state.flowing && !state.reading) stream.read(0);
}

Readable.prototype.pause = function () {
  debug('call pause flowing=%j', this._readableState.flowing);
  if (false !== this._readableState.flowing) {
    debug('pause');
    this._readableState.flowing = false;
    this.emit('pause');
  }
  return this;
};

function flow(stream) {
  var state = stream._readableState;
  debug('flow', state.flowing);
  while (state.flowing && stream.read() !== null) {}
}

// wrap an old-style stream as the async data source.
// This is *not* part of the readable stream interface.
// It is an ugly unfortunate mess of history.
Readable.prototype.wrap = function (stream) {
  var _this = this;

  var state = this._readableState;
  var paused = false;

  stream.on('end', function () {
    debug('wrapped end');
    if (state.decoder && !state.ended) {
      var chunk = state.decoder.end();
      if (chunk && chunk.length) _this.push(chunk);
    }

    _this.push(null);
  });

  stream.on('data', function (chunk) {
    debug('wrapped data');
    if (state.decoder) chunk = state.decoder.write(chunk);

    // don't skip over falsy values in objectMode
    if (state.objectMode && (chunk === null || chunk === undefined)) return;else if (!state.objectMode && (!chunk || !chunk.length)) return;

    var ret = _this.push(chunk);
    if (!ret) {
      paused = true;
      stream.pause();
    }
  });

  // proxy all the other methods.
  // important when wrapping filters and duplexes.
  for (var i in stream) {
    if (this[i] === undefined && typeof stream[i] === 'function') {
      this[i] = function (method) {
        return function () {
          return stream[method].apply(stream, arguments);
        };
      }(i);
    }
  }

  // proxy certain important events.
  for (var n = 0; n < kProxyEvents.length; n++) {
    stream.on(kProxyEvents[n], this.emit.bind(this, kProxyEvents[n]));
  }

  // when we try to consume some more bytes, simply unpause the
  // underlying stream.
  this._read = function (n) {
    debug('wrapped _read', n);
    if (paused) {
      paused = false;
      stream.resume();
    }
  };

  return this;
};

// exposed for testing purposes only.
Readable._fromList = fromList;

// Pluck off n bytes from an array of buffers.
// Length is the combined lengths of all the buffers in the list.
// This function is designed to be inlinable, so please take care when making
// changes to the function body.
function fromList(n, state) {
  // nothing buffered
  if (state.length === 0) return null;

  var ret;
  if (state.objectMode) ret = state.buffer.shift();else if (!n || n >= state.length) {
    // read it all, truncate the list
    if (state.decoder) ret = state.buffer.join('');else if (state.buffer.length === 1) ret = state.buffer.head.data;else ret = state.buffer.concat(state.length);
    state.buffer.clear();
  } else {
    // read part of list
    ret = fromListPartial(n, state.buffer, state.decoder);
  }

  return ret;
}

// Extracts only enough buffered data to satisfy the amount requested.
// This function is designed to be inlinable, so please take care when making
// changes to the function body.
function fromListPartial(n, list, hasStrings) {
  var ret;
  if (n < list.head.data.length) {
    // slice is the same for buffers and strings
    ret = list.head.data.slice(0, n);
    list.head.data = list.head.data.slice(n);
  } else if (n === list.head.data.length) {
    // first chunk is a perfect match
    ret = list.shift();
  } else {
    // result spans more than one buffer
    ret = hasStrings ? copyFromBufferString(n, list) : copyFromBuffer(n, list);
  }
  return ret;
}

// Copies a specified amount of characters from the list of buffered data
// chunks.
// This function is designed to be inlinable, so please take care when making
// changes to the function body.
function copyFromBufferString(n, list) {
  var p = list.head;
  var c = 1;
  var ret = p.data;
  n -= ret.length;
  while (p = p.next) {
    var str = p.data;
    var nb = n > str.length ? str.length : n;
    if (nb === str.length) ret += str;else ret += str.slice(0, n);
    n -= nb;
    if (n === 0) {
      if (nb === str.length) {
        ++c;
        if (p.next) list.head = p.next;else list.head = list.tail = null;
      } else {
        list.head = p;
        p.data = str.slice(nb);
      }
      break;
    }
    ++c;
  }
  list.length -= c;
  return ret;
}

// Copies a specified amount of bytes from the list of buffered data chunks.
// This function is designed to be inlinable, so please take care when making
// changes to the function body.
function copyFromBuffer(n, list) {
  var ret = Buffer.allocUnsafe(n);
  var p = list.head;
  var c = 1;
  p.data.copy(ret);
  n -= p.data.length;
  while (p = p.next) {
    var buf = p.data;
    var nb = n > buf.length ? buf.length : n;
    buf.copy(ret, ret.length - n, 0, nb);
    n -= nb;
    if (n === 0) {
      if (nb === buf.length) {
        ++c;
        if (p.next) list.head = p.next;else list.head = list.tail = null;
      } else {
        list.head = p;
        p.data = buf.slice(nb);
      }
      break;
    }
    ++c;
  }
  list.length -= c;
  return ret;
}

function endReadable(stream) {
  var state = stream._readableState;

  // If we get here before consuming all the bytes, then that is a
  // bug in node.  Should never happen.
  if (state.length > 0) throw new Error('"endReadable()" called on non-empty stream');

  if (!state.endEmitted) {
    state.ended = true;
    pna.nextTick(endReadableNT, state, stream);
  }
}

function endReadableNT(state, stream) {
  // Check that we didn't get one last unshift.
  if (!state.endEmitted && state.length === 0) {
    state.endEmitted = true;
    stream.readable = false;
    stream.emit('end');
  }
}

function forEach(xs, f) {
  for (var i = 0, l = xs.length; i < l; i++) {
    f(xs[i], i);
  }
}

function indexOf(xs, x) {
  for (var i = 0, l = xs.length; i < l; i++) {
    if (xs[i] === x) return i;
  }
  return -1;
}
}).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"./_stream_duplex":38,"./internal/streams/BufferList":43,"./internal/streams/destroy":44,"./internal/streams/stream":45,"_process":36,"core-util-is":26,"events":27,"inherits":31,"isarray":33,"process-nextick-args":35,"safe-buffer":51,"string_decoder/":53,"util":22}],41:[function(require,module,exports){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

// a transform stream is a readable/writable stream where you do
// something with the data.  Sometimes it's called a "filter",
// but that's not a great name for it, since that implies a thing where
// some bits pass through, and others are simply ignored.  (That would
// be a valid example of a transform, of course.)
//
// While the output is causally related to the input, it's not a
// necessarily symmetric or synchronous transformation.  For example,
// a zlib stream might take multiple plain-text writes(), and then
// emit a single compressed chunk some time in the future.
//
// Here's how this works:
//
// The Transform stream has all the aspects of the readable and writable
// stream classes.  When you write(chunk), that calls _write(chunk,cb)
// internally, and returns false if there's a lot of pending writes
// buffered up.  When you call read(), that calls _read(n) until
// there's enough pending readable data buffered up.
//
// In a transform stream, the written data is placed in a buffer.  When
// _read(n) is called, it transforms the queued up data, calling the
// buffered _write cb's as it consumes chunks.  If consuming a single
// written chunk would result in multiple output chunks, then the first
// outputted bit calls the readcb, and subsequent chunks just go into
// the read buffer, and will cause it to emit 'readable' if necessary.
//
// This way, back-pressure is actually determined by the reading side,
// since _read has to be called to start processing a new chunk.  However,
// a pathological inflate type of transform can cause excessive buffering
// here.  For example, imagine a stream where every byte of input is
// interpreted as an integer from 0-255, and then results in that many
// bytes of output.  Writing the 4 bytes {ff,ff,ff,ff} would result in
// 1kb of data being output.  In this case, you could write a very small
// amount of input, and end up with a very large amount of output.  In
// such a pathological inflating mechanism, there'd be no way to tell
// the system to stop doing the transform.  A single 4MB write could
// cause the system to run out of memory.
//
// However, even in such a pathological case, only a single written chunk
// would be consumed, and then the rest would wait (un-transformed) until
// the results of the previous transformed chunk were consumed.

'use strict';

module.exports = Transform;

var Duplex = require('./_stream_duplex');

/*<replacement>*/
var util = require('core-util-is');
util.inherits = require('inherits');
/*</replacement>*/

util.inherits(Transform, Duplex);

function afterTransform(er, data) {
  var ts = this._transformState;
  ts.transforming = false;

  var cb = ts.writecb;

  if (!cb) {
    return this.emit('error', new Error('write callback called multiple times'));
  }

  ts.writechunk = null;
  ts.writecb = null;

  if (data != null) // single equals check for both `null` and `undefined`
    this.push(data);

  cb(er);

  var rs = this._readableState;
  rs.reading = false;
  if (rs.needReadable || rs.length < rs.highWaterMark) {
    this._read(rs.highWaterMark);
  }
}

function Transform(options) {
  if (!(this instanceof Transform)) return new Transform(options);

  Duplex.call(this, options);

  this._transformState = {
    afterTransform: afterTransform.bind(this),
    needTransform: false,
    transforming: false,
    writecb: null,
    writechunk: null,
    writeencoding: null
  };

  // start out asking for a readable event once data is transformed.
  this._readableState.needReadable = true;

  // we have implemented the _read method, and done the other things
  // that Readable wants before the first _read call, so unset the
  // sync guard flag.
  this._readableState.sync = false;

  if (options) {
    if (typeof options.transform === 'function') this._transform = options.transform;

    if (typeof options.flush === 'function') this._flush = options.flush;
  }

  // When the writable side finishes, then flush out anything remaining.
  this.on('prefinish', prefinish);
}

function prefinish() {
  var _this = this;

  if (typeof this._flush === 'function') {
    this._flush(function (er, data) {
      done(_this, er, data);
    });
  } else {
    done(this, null, null);
  }
}

Transform.prototype.push = function (chunk, encoding) {
  this._transformState.needTransform = false;
  return Duplex.prototype.push.call(this, chunk, encoding);
};

// This is the part where you do stuff!
// override this function in implementation classes.
// 'chunk' is an input chunk.
//
// Call `push(newChunk)` to pass along transformed output
// to the readable side.  You may call 'push' zero or more times.
//
// Call `cb(err)` when you are done with this chunk.  If you pass
// an error, then that'll put the hurt on the whole operation.  If you
// never call cb(), then you'll never get another chunk.
Transform.prototype._transform = function (chunk, encoding, cb) {
  throw new Error('_transform() is not implemented');
};

Transform.prototype._write = function (chunk, encoding, cb) {
  var ts = this._transformState;
  ts.writecb = cb;
  ts.writechunk = chunk;
  ts.writeencoding = encoding;
  if (!ts.transforming) {
    var rs = this._readableState;
    if (ts.needTransform || rs.needReadable || rs.length < rs.highWaterMark) this._read(rs.highWaterMark);
  }
};

// Doesn't matter what the args are here.
// _transform does all the work.
// That we got here means that the readable side wants more data.
Transform.prototype._read = function (n) {
  var ts = this._transformState;

  if (ts.writechunk !== null && ts.writecb && !ts.transforming) {
    ts.transforming = true;
    this._transform(ts.writechunk, ts.writeencoding, ts.afterTransform);
  } else {
    // mark that we need a transform, so that any data that comes in
    // will get processed, now that we've asked for it.
    ts.needTransform = true;
  }
};

Transform.prototype._destroy = function (err, cb) {
  var _this2 = this;

  Duplex.prototype._destroy.call(this, err, function (err2) {
    cb(err2);
    _this2.emit('close');
  });
};

function done(stream, er, data) {
  if (er) return stream.emit('error', er);

  if (data != null) // single equals check for both `null` and `undefined`
    stream.push(data);

  // if there's nothing in the write buffer, then that means
  // that nothing more will ever be provided
  if (stream._writableState.length) throw new Error('Calling transform done when ws.length != 0');

  if (stream._transformState.transforming) throw new Error('Calling transform done when still transforming');

  return stream.push(null);
}
},{"./_stream_duplex":38,"core-util-is":26,"inherits":31}],42:[function(require,module,exports){
(function (process,global){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

// A bit simpler than readable streams.
// Implement an async ._write(chunk, encoding, cb), and it'll handle all
// the drain event emission and buffering.

'use strict';

/*<replacement>*/

var pna = require('process-nextick-args');
/*</replacement>*/

module.exports = Writable;

/* <replacement> */
function WriteReq(chunk, encoding, cb) {
  this.chunk = chunk;
  this.encoding = encoding;
  this.callback = cb;
  this.next = null;
}

// It seems a linked list but it is not
// there will be only 2 of these for each stream
function CorkedRequest(state) {
  var _this = this;

  this.next = null;
  this.entry = null;
  this.finish = function () {
    onCorkedFinish(_this, state);
  };
}
/* </replacement> */

/*<replacement>*/
var asyncWrite = !process.browser && ['v0.10', 'v0.9.'].indexOf(process.version.slice(0, 5)) > -1 ? setImmediate : pna.nextTick;
/*</replacement>*/

/*<replacement>*/
var Duplex;
/*</replacement>*/

Writable.WritableState = WritableState;

/*<replacement>*/
var util = require('core-util-is');
util.inherits = require('inherits');
/*</replacement>*/

/*<replacement>*/
var internalUtil = {
  deprecate: require('util-deprecate')
};
/*</replacement>*/

/*<replacement>*/
var Stream = require('./internal/streams/stream');
/*</replacement>*/

/*<replacement>*/

var Buffer = require('safe-buffer').Buffer;
var OurUint8Array = global.Uint8Array || function () {};
function _uint8ArrayToBuffer(chunk) {
  return Buffer.from(chunk);
}
function _isUint8Array(obj) {
  return Buffer.isBuffer(obj) || obj instanceof OurUint8Array;
}

/*</replacement>*/

var destroyImpl = require('./internal/streams/destroy');

util.inherits(Writable, Stream);

function nop() {}

function WritableState(options, stream) {
  Duplex = Duplex || require('./_stream_duplex');

  options = options || {};

  // Duplex streams are both readable and writable, but share
  // the same options object.
  // However, some cases require setting options to different
  // values for the readable and the writable sides of the duplex stream.
  // These options can be provided separately as readableXXX and writableXXX.
  var isDuplex = stream instanceof Duplex;

  // object stream flag to indicate whether or not this stream
  // contains buffers or objects.
  this.objectMode = !!options.objectMode;

  if (isDuplex) this.objectMode = this.objectMode || !!options.writableObjectMode;

  // the point at which write() starts returning false
  // Note: 0 is a valid value, means that we always return false if
  // the entire buffer is not flushed immediately on write()
  var hwm = options.highWaterMark;
  var writableHwm = options.writableHighWaterMark;
  var defaultHwm = this.objectMode ? 16 : 16 * 1024;

  if (hwm || hwm === 0) this.highWaterMark = hwm;else if (isDuplex && (writableHwm || writableHwm === 0)) this.highWaterMark = writableHwm;else this.highWaterMark = defaultHwm;

  // cast to ints.
  this.highWaterMark = Math.floor(this.highWaterMark);

  // if _final has been called
  this.finalCalled = false;

  // drain event flag.
  this.needDrain = false;
  // at the start of calling end()
  this.ending = false;
  // when end() has been called, and returned
  this.ended = false;
  // when 'finish' is emitted
  this.finished = false;

  // has it been destroyed
  this.destroyed = false;

  // should we decode strings into buffers before passing to _write?
  // this is here so that some node-core streams can optimize string
  // handling at a lower level.
  var noDecode = options.decodeStrings === false;
  this.decodeStrings = !noDecode;

  // Crypto is kind of old and crusty.  Historically, its default string
  // encoding is 'binary' so we have to make this configurable.
  // Everything else in the universe uses 'utf8', though.
  this.defaultEncoding = options.defaultEncoding || 'utf8';

  // not an actual buffer we keep track of, but a measurement
  // of how much we're waiting to get pushed to some underlying
  // socket or file.
  this.length = 0;

  // a flag to see when we're in the middle of a write.
  this.writing = false;

  // when true all writes will be buffered until .uncork() call
  this.corked = 0;

  // a flag to be able to tell if the onwrite cb is called immediately,
  // or on a later tick.  We set this to true at first, because any
  // actions that shouldn't happen until "later" should generally also
  // not happen before the first write call.
  this.sync = true;

  // a flag to know if we're processing previously buffered items, which
  // may call the _write() callback in the same tick, so that we don't
  // end up in an overlapped onwrite situation.
  this.bufferProcessing = false;

  // the callback that's passed to _write(chunk,cb)
  this.onwrite = function (er) {
    onwrite(stream, er);
  };

  // the callback that the user supplies to write(chunk,encoding,cb)
  this.writecb = null;

  // the amount that is being written when _write is called.
  this.writelen = 0;

  this.bufferedRequest = null;
  this.lastBufferedRequest = null;

  // number of pending user-supplied write callbacks
  // this must be 0 before 'finish' can be emitted
  this.pendingcb = 0;

  // emit prefinish if the only thing we're waiting for is _write cbs
  // This is relevant for synchronous Transform streams
  this.prefinished = false;

  // True if the error was already emitted and should not be thrown again
  this.errorEmitted = false;

  // count buffered requests
  this.bufferedRequestCount = 0;

  // allocate the first CorkedRequest, there is always
  // one allocated and free to use, and we maintain at most two
  this.corkedRequestsFree = new CorkedRequest(this);
}

WritableState.prototype.getBuffer = function getBuffer() {
  var current = this.bufferedRequest;
  var out = [];
  while (current) {
    out.push(current);
    current = current.next;
  }
  return out;
};

(function () {
  try {
    Object.defineProperty(WritableState.prototype, 'buffer', {
      get: internalUtil.deprecate(function () {
        return this.getBuffer();
      }, '_writableState.buffer is deprecated. Use _writableState.getBuffer ' + 'instead.', 'DEP0003')
    });
  } catch (_) {}
})();

// Test _writableState for inheritance to account for Duplex streams,
// whose prototype chain only points to Readable.
var realHasInstance;
if (typeof Symbol === 'function' && Symbol.hasInstance && typeof Function.prototype[Symbol.hasInstance] === 'function') {
  realHasInstance = Function.prototype[Symbol.hasInstance];
  Object.defineProperty(Writable, Symbol.hasInstance, {
    value: function (object) {
      if (realHasInstance.call(this, object)) return true;
      if (this !== Writable) return false;

      return object && object._writableState instanceof WritableState;
    }
  });
} else {
  realHasInstance = function (object) {
    return object instanceof this;
  };
}

function Writable(options) {
  Duplex = Duplex || require('./_stream_duplex');

  // Writable ctor is applied to Duplexes, too.
  // `realHasInstance` is necessary because using plain `instanceof`
  // would return false, as no `_writableState` property is attached.

  // Trying to use the custom `instanceof` for Writable here will also break the
  // Node.js LazyTransform implementation, which has a non-trivial getter for
  // `_writableState` that would lead to infinite recursion.
  if (!realHasInstance.call(Writable, this) && !(this instanceof Duplex)) {
    return new Writable(options);
  }

  this._writableState = new WritableState(options, this);

  // legacy.
  this.writable = true;

  if (options) {
    if (typeof options.write === 'function') this._write = options.write;

    if (typeof options.writev === 'function') this._writev = options.writev;

    if (typeof options.destroy === 'function') this._destroy = options.destroy;

    if (typeof options.final === 'function') this._final = options.final;
  }

  Stream.call(this);
}

// Otherwise people can pipe Writable streams, which is just wrong.
Writable.prototype.pipe = function () {
  this.emit('error', new Error('Cannot pipe, not readable'));
};

function writeAfterEnd(stream, cb) {
  var er = new Error('write after end');
  // TODO: defer error events consistently everywhere, not just the cb
  stream.emit('error', er);
  pna.nextTick(cb, er);
}

// Checks that a user-supplied chunk is valid, especially for the particular
// mode the stream is in. Currently this means that `null` is never accepted
// and undefined/non-string values are only allowed in object mode.
function validChunk(stream, state, chunk, cb) {
  var valid = true;
  var er = false;

  if (chunk === null) {
    er = new TypeError('May not write null values to stream');
  } else if (typeof chunk !== 'string' && chunk !== undefined && !state.objectMode) {
    er = new TypeError('Invalid non-string/buffer chunk');
  }
  if (er) {
    stream.emit('error', er);
    pna.nextTick(cb, er);
    valid = false;
  }
  return valid;
}

Writable.prototype.write = function (chunk, encoding, cb) {
  var state = this._writableState;
  var ret = false;
  var isBuf = !state.objectMode && _isUint8Array(chunk);

  if (isBuf && !Buffer.isBuffer(chunk)) {
    chunk = _uint8ArrayToBuffer(chunk);
  }

  if (typeof encoding === 'function') {
    cb = encoding;
    encoding = null;
  }

  if (isBuf) encoding = 'buffer';else if (!encoding) encoding = state.defaultEncoding;

  if (typeof cb !== 'function') cb = nop;

  if (state.ended) writeAfterEnd(this, cb);else if (isBuf || validChunk(this, state, chunk, cb)) {
    state.pendingcb++;
    ret = writeOrBuffer(this, state, isBuf, chunk, encoding, cb);
  }

  return ret;
};

Writable.prototype.cork = function () {
  var state = this._writableState;

  state.corked++;
};

Writable.prototype.uncork = function () {
  var state = this._writableState;

  if (state.corked) {
    state.corked--;

    if (!state.writing && !state.corked && !state.finished && !state.bufferProcessing && state.bufferedRequest) clearBuffer(this, state);
  }
};

Writable.prototype.setDefaultEncoding = function setDefaultEncoding(encoding) {
  // node::ParseEncoding() requires lower case.
  if (typeof encoding === 'string') encoding = encoding.toLowerCase();
  if (!(['hex', 'utf8', 'utf-8', 'ascii', 'binary', 'base64', 'ucs2', 'ucs-2', 'utf16le', 'utf-16le', 'raw'].indexOf((encoding + '').toLowerCase()) > -1)) throw new TypeError('Unknown encoding: ' + encoding);
  this._writableState.defaultEncoding = encoding;
  return this;
};

function decodeChunk(state, chunk, encoding) {
  if (!state.objectMode && state.decodeStrings !== false && typeof chunk === 'string') {
    chunk = Buffer.from(chunk, encoding);
  }
  return chunk;
}

// if we're already writing something, then just put this
// in the queue, and wait our turn.  Otherwise, call _write
// If we return false, then we need a drain event, so set that flag.
function writeOrBuffer(stream, state, isBuf, chunk, encoding, cb) {
  if (!isBuf) {
    var newChunk = decodeChunk(state, chunk, encoding);
    if (chunk !== newChunk) {
      isBuf = true;
      encoding = 'buffer';
      chunk = newChunk;
    }
  }
  var len = state.objectMode ? 1 : chunk.length;

  state.length += len;

  var ret = state.length < state.highWaterMark;
  // we must ensure that previous needDrain will not be reset to false.
  if (!ret) state.needDrain = true;

  if (state.writing || state.corked) {
    var last = state.lastBufferedRequest;
    state.lastBufferedRequest = {
      chunk: chunk,
      encoding: encoding,
      isBuf: isBuf,
      callback: cb,
      next: null
    };
    if (last) {
      last.next = state.lastBufferedRequest;
    } else {
      state.bufferedRequest = state.lastBufferedRequest;
    }
    state.bufferedRequestCount += 1;
  } else {
    doWrite(stream, state, false, len, chunk, encoding, cb);
  }

  return ret;
}

function doWrite(stream, state, writev, len, chunk, encoding, cb) {
  state.writelen = len;
  state.writecb = cb;
  state.writing = true;
  state.sync = true;
  if (writev) stream._writev(chunk, state.onwrite);else stream._write(chunk, encoding, state.onwrite);
  state.sync = false;
}

function onwriteError(stream, state, sync, er, cb) {
  --state.pendingcb;

  if (sync) {
    // defer the callback if we are being called synchronously
    // to avoid piling up things on the stack
    pna.nextTick(cb, er);
    // this can emit finish, and it will always happen
    // after error
    pna.nextTick(finishMaybe, stream, state);
    stream._writableState.errorEmitted = true;
    stream.emit('error', er);
  } else {
    // the caller expect this to happen before if
    // it is async
    cb(er);
    stream._writableState.errorEmitted = true;
    stream.emit('error', er);
    // this can emit finish, but finish must
    // always follow error
    finishMaybe(stream, state);
  }
}

function onwriteStateUpdate(state) {
  state.writing = false;
  state.writecb = null;
  state.length -= state.writelen;
  state.writelen = 0;
}

function onwrite(stream, er) {
  var state = stream._writableState;
  var sync = state.sync;
  var cb = state.writecb;

  onwriteStateUpdate(state);

  if (er) onwriteError(stream, state, sync, er, cb);else {
    // Check if we're actually ready to finish, but don't emit yet
    var finished = needFinish(state);

    if (!finished && !state.corked && !state.bufferProcessing && state.bufferedRequest) {
      clearBuffer(stream, state);
    }

    if (sync) {
      /*<replacement>*/
      asyncWrite(afterWrite, stream, state, finished, cb);
      /*</replacement>*/
    } else {
      afterWrite(stream, state, finished, cb);
    }
  }
}

function afterWrite(stream, state, finished, cb) {
  if (!finished) onwriteDrain(stream, state);
  state.pendingcb--;
  cb();
  finishMaybe(stream, state);
}

// Must force callback to be called on nextTick, so that we don't
// emit 'drain' before the write() consumer gets the 'false' return
// value, and has a chance to attach a 'drain' listener.
function onwriteDrain(stream, state) {
  if (state.length === 0 && state.needDrain) {
    state.needDrain = false;
    stream.emit('drain');
  }
}

// if there's something in the buffer waiting, then process it
function clearBuffer(stream, state) {
  state.bufferProcessing = true;
  var entry = state.bufferedRequest;

  if (stream._writev && entry && entry.next) {
    // Fast case, write everything using _writev()
    var l = state.bufferedRequestCount;
    var buffer = new Array(l);
    var holder = state.corkedRequestsFree;
    holder.entry = entry;

    var count = 0;
    var allBuffers = true;
    while (entry) {
      buffer[count] = entry;
      if (!entry.isBuf) allBuffers = false;
      entry = entry.next;
      count += 1;
    }
    buffer.allBuffers = allBuffers;

    doWrite(stream, state, true, state.length, buffer, '', holder.finish);

    // doWrite is almost always async, defer these to save a bit of time
    // as the hot path ends with doWrite
    state.pendingcb++;
    state.lastBufferedRequest = null;
    if (holder.next) {
      state.corkedRequestsFree = holder.next;
      holder.next = null;
    } else {
      state.corkedRequestsFree = new CorkedRequest(state);
    }
    state.bufferedRequestCount = 0;
  } else {
    // Slow case, write chunks one-by-one
    while (entry) {
      var chunk = entry.chunk;
      var encoding = entry.encoding;
      var cb = entry.callback;
      var len = state.objectMode ? 1 : chunk.length;

      doWrite(stream, state, false, len, chunk, encoding, cb);
      entry = entry.next;
      state.bufferedRequestCount--;
      // if we didn't call the onwrite immediately, then
      // it means that we need to wait until it does.
      // also, that means that the chunk and cb are currently
      // being processed, so move the buffer counter past them.
      if (state.writing) {
        break;
      }
    }

    if (entry === null) state.lastBufferedRequest = null;
  }

  state.bufferedRequest = entry;
  state.bufferProcessing = false;
}

Writable.prototype._write = function (chunk, encoding, cb) {
  cb(new Error('_write() is not implemented'));
};

Writable.prototype._writev = null;

Writable.prototype.end = function (chunk, encoding, cb) {
  var state = this._writableState;

  if (typeof chunk === 'function') {
    cb = chunk;
    chunk = null;
    encoding = null;
  } else if (typeof encoding === 'function') {
    cb = encoding;
    encoding = null;
  }

  if (chunk !== null && chunk !== undefined) this.write(chunk, encoding);

  // .end() fully uncorks
  if (state.corked) {
    state.corked = 1;
    this.uncork();
  }

  // ignore unnecessary end() calls.
  if (!state.ending && !state.finished) endWritable(this, state, cb);
};

function needFinish(state) {
  return state.ending && state.length === 0 && state.bufferedRequest === null && !state.finished && !state.writing;
}
function callFinal(stream, state) {
  stream._final(function (err) {
    state.pendingcb--;
    if (err) {
      stream.emit('error', err);
    }
    state.prefinished = true;
    stream.emit('prefinish');
    finishMaybe(stream, state);
  });
}
function prefinish(stream, state) {
  if (!state.prefinished && !state.finalCalled) {
    if (typeof stream._final === 'function') {
      state.pendingcb++;
      state.finalCalled = true;
      pna.nextTick(callFinal, stream, state);
    } else {
      state.prefinished = true;
      stream.emit('prefinish');
    }
  }
}

function finishMaybe(stream, state) {
  var need = needFinish(state);
  if (need) {
    prefinish(stream, state);
    if (state.pendingcb === 0) {
      state.finished = true;
      stream.emit('finish');
    }
  }
  return need;
}

function endWritable(stream, state, cb) {
  state.ending = true;
  finishMaybe(stream, state);
  if (cb) {
    if (state.finished) pna.nextTick(cb);else stream.once('finish', cb);
  }
  state.ended = true;
  stream.writable = false;
}

function onCorkedFinish(corkReq, state, err) {
  var entry = corkReq.entry;
  corkReq.entry = null;
  while (entry) {
    var cb = entry.callback;
    state.pendingcb--;
    cb(err);
    entry = entry.next;
  }
  if (state.corkedRequestsFree) {
    state.corkedRequestsFree.next = corkReq;
  } else {
    state.corkedRequestsFree = corkReq;
  }
}

Object.defineProperty(Writable.prototype, 'destroyed', {
  get: function () {
    if (this._writableState === undefined) {
      return false;
    }
    return this._writableState.destroyed;
  },
  set: function (value) {
    // we ignore the value if the stream
    // has not been initialized yet
    if (!this._writableState) {
      return;
    }

    // backward compatibility, the user is explicitly
    // managing destroyed
    this._writableState.destroyed = value;
  }
});

Writable.prototype.destroy = destroyImpl.destroy;
Writable.prototype._undestroy = destroyImpl.undestroy;
Writable.prototype._destroy = function (err, cb) {
  this.end();
  cb(err);
};
}).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"./_stream_duplex":38,"./internal/streams/destroy":44,"./internal/streams/stream":45,"_process":36,"core-util-is":26,"inherits":31,"process-nextick-args":35,"safe-buffer":51,"util-deprecate":55}],43:[function(require,module,exports){
'use strict';

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

var Buffer = require('safe-buffer').Buffer;
var util = require('util');

function copyBuffer(src, target, offset) {
  src.copy(target, offset);
}

module.exports = function () {
  function BufferList() {
    _classCallCheck(this, BufferList);

    this.head = null;
    this.tail = null;
    this.length = 0;
  }

  BufferList.prototype.push = function push(v) {
    var entry = { data: v, next: null };
    if (this.length > 0) this.tail.next = entry;else this.head = entry;
    this.tail = entry;
    ++this.length;
  };

  BufferList.prototype.unshift = function unshift(v) {
    var entry = { data: v, next: this.head };
    if (this.length === 0) this.tail = entry;
    this.head = entry;
    ++this.length;
  };

  BufferList.prototype.shift = function shift() {
    if (this.length === 0) return;
    var ret = this.head.data;
    if (this.length === 1) this.head = this.tail = null;else this.head = this.head.next;
    --this.length;
    return ret;
  };

  BufferList.prototype.clear = function clear() {
    this.head = this.tail = null;
    this.length = 0;
  };

  BufferList.prototype.join = function join(s) {
    if (this.length === 0) return '';
    var p = this.head;
    var ret = '' + p.data;
    while (p = p.next) {
      ret += s + p.data;
    }return ret;
  };

  BufferList.prototype.concat = function concat(n) {
    if (this.length === 0) return Buffer.alloc(0);
    if (this.length === 1) return this.head.data;
    var ret = Buffer.allocUnsafe(n >>> 0);
    var p = this.head;
    var i = 0;
    while (p) {
      copyBuffer(p.data, ret, i);
      i += p.data.length;
      p = p.next;
    }
    return ret;
  };

  return BufferList;
}();

if (util && util.inspect && util.inspect.custom) {
  module.exports.prototype[util.inspect.custom] = function () {
    var obj = util.inspect({ length: this.length });
    return this.constructor.name + ' ' + obj;
  };
}
},{"safe-buffer":51,"util":22}],44:[function(require,module,exports){
'use strict';

/*<replacement>*/

var pna = require('process-nextick-args');
/*</replacement>*/

// undocumented cb() API, needed for core, not for public API
function destroy(err, cb) {
  var _this = this;

  var readableDestroyed = this._readableState && this._readableState.destroyed;
  var writableDestroyed = this._writableState && this._writableState.destroyed;

  if (readableDestroyed || writableDestroyed) {
    if (cb) {
      cb(err);
    } else if (err && (!this._writableState || !this._writableState.errorEmitted)) {
      pna.nextTick(emitErrorNT, this, err);
    }
    return this;
  }

  // we set destroyed to true before firing error callbacks in order
  // to make it re-entrance safe in case destroy() is called within callbacks

  if (this._readableState) {
    this._readableState.destroyed = true;
  }

  // if this is a duplex stream mark the writable part as destroyed as well
  if (this._writableState) {
    this._writableState.destroyed = true;
  }

  this._destroy(err || null, function (err) {
    if (!cb && err) {
      pna.nextTick(emitErrorNT, _this, err);
      if (_this._writableState) {
        _this._writableState.errorEmitted = true;
      }
    } else if (cb) {
      cb(err);
    }
  });

  return this;
}

function undestroy() {
  if (this._readableState) {
    this._readableState.destroyed = false;
    this._readableState.reading = false;
    this._readableState.ended = false;
    this._readableState.endEmitted = false;
  }

  if (this._writableState) {
    this._writableState.destroyed = false;
    this._writableState.ended = false;
    this._writableState.ending = false;
    this._writableState.finished = false;
    this._writableState.errorEmitted = false;
  }
}

function emitErrorNT(self, err) {
  self.emit('error', err);
}

module.exports = {
  destroy: destroy,
  undestroy: undestroy
};
},{"process-nextick-args":35}],45:[function(require,module,exports){
module.exports = require('events').EventEmitter;

},{"events":27}],46:[function(require,module,exports){
module.exports = require('./readable').PassThrough

},{"./readable":47}],47:[function(require,module,exports){
exports = module.exports = require('./lib/_stream_readable.js');
exports.Stream = exports;
exports.Readable = exports;
exports.Writable = require('./lib/_stream_writable.js');
exports.Duplex = require('./lib/_stream_duplex.js');
exports.Transform = require('./lib/_stream_transform.js');
exports.PassThrough = require('./lib/_stream_passthrough.js');

},{"./lib/_stream_duplex.js":38,"./lib/_stream_passthrough.js":39,"./lib/_stream_readable.js":40,"./lib/_stream_transform.js":41,"./lib/_stream_writable.js":42}],48:[function(require,module,exports){
module.exports = require('./readable').Transform

},{"./readable":47}],49:[function(require,module,exports){
module.exports = require('./lib/_stream_writable.js');

},{"./lib/_stream_writable.js":42}],50:[function(require,module,exports){
(function (Buffer){
'use strict'
var inherits = require('inherits')
var HashBase = require('hash-base')

function RIPEMD160 () {
  HashBase.call(this, 64)

  // state
  this._a = 0x67452301
  this._b = 0xefcdab89
  this._c = 0x98badcfe
  this._d = 0x10325476
  this._e = 0xc3d2e1f0
}

inherits(RIPEMD160, HashBase)

RIPEMD160.prototype._update = function () {
  var m = new Array(16)
  for (var i = 0; i < 16; ++i) m[i] = this._block.readInt32LE(i * 4)

  var al = this._a
  var bl = this._b
  var cl = this._c
  var dl = this._d
  var el = this._e

  // Mj = 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
  // K = 0x00000000
  // Sj = 11, 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8
  al = fn1(al, bl, cl, dl, el, m[0], 0x00000000, 11); cl = rotl(cl, 10)
  el = fn1(el, al, bl, cl, dl, m[1], 0x00000000, 14); bl = rotl(bl, 10)
  dl = fn1(dl, el, al, bl, cl, m[2], 0x00000000, 15); al = rotl(al, 10)
  cl = fn1(cl, dl, el, al, bl, m[3], 0x00000000, 12); el = rotl(el, 10)
  bl = fn1(bl, cl, dl, el, al, m[4], 0x00000000, 5); dl = rotl(dl, 10)
  al = fn1(al, bl, cl, dl, el, m[5], 0x00000000, 8); cl = rotl(cl, 10)
  el = fn1(el, al, bl, cl, dl, m[6], 0x00000000, 7); bl = rotl(bl, 10)
  dl = fn1(dl, el, al, bl, cl, m[7], 0x00000000, 9); al = rotl(al, 10)
  cl = fn1(cl, dl, el, al, bl, m[8], 0x00000000, 11); el = rotl(el, 10)
  bl = fn1(bl, cl, dl, el, al, m[9], 0x00000000, 13); dl = rotl(dl, 10)
  al = fn1(al, bl, cl, dl, el, m[10], 0x00000000, 14); cl = rotl(cl, 10)
  el = fn1(el, al, bl, cl, dl, m[11], 0x00000000, 15); bl = rotl(bl, 10)
  dl = fn1(dl, el, al, bl, cl, m[12], 0x00000000, 6); al = rotl(al, 10)
  cl = fn1(cl, dl, el, al, bl, m[13], 0x00000000, 7); el = rotl(el, 10)
  bl = fn1(bl, cl, dl, el, al, m[14], 0x00000000, 9); dl = rotl(dl, 10)
  al = fn1(al, bl, cl, dl, el, m[15], 0x00000000, 8); cl = rotl(cl, 10)

  // Mj = 7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8
  // K = 0x5a827999
  // Sj = 7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12
  el = fn2(el, al, bl, cl, dl, m[7], 0x5a827999, 7); bl = rotl(bl, 10)
  dl = fn2(dl, el, al, bl, cl, m[4], 0x5a827999, 6); al = rotl(al, 10)
  cl = fn2(cl, dl, el, al, bl, m[13], 0x5a827999, 8); el = rotl(el, 10)
  bl = fn2(bl, cl, dl, el, al, m[1], 0x5a827999, 13); dl = rotl(dl, 10)
  al = fn2(al, bl, cl, dl, el, m[10], 0x5a827999, 11); cl = rotl(cl, 10)
  el = fn2(el, al, bl, cl, dl, m[6], 0x5a827999, 9); bl = rotl(bl, 10)
  dl = fn2(dl, el, al, bl, cl, m[15], 0x5a827999, 7); al = rotl(al, 10)
  cl = fn2(cl, dl, el, al, bl, m[3], 0x5a827999, 15); el = rotl(el, 10)
  bl = fn2(bl, cl, dl, el, al, m[12], 0x5a827999, 7); dl = rotl(dl, 10)
  al = fn2(al, bl, cl, dl, el, m[0], 0x5a827999, 12); cl = rotl(cl, 10)
  el = fn2(el, al, bl, cl, dl, m[9], 0x5a827999, 15); bl = rotl(bl, 10)
  dl = fn2(dl, el, al, bl, cl, m[5], 0x5a827999, 9); al = rotl(al, 10)
  cl = fn2(cl, dl, el, al, bl, m[2], 0x5a827999, 11); el = rotl(el, 10)
  bl = fn2(bl, cl, dl, el, al, m[14], 0x5a827999, 7); dl = rotl(dl, 10)
  al = fn2(al, bl, cl, dl, el, m[11], 0x5a827999, 13); cl = rotl(cl, 10)
  el = fn2(el, al, bl, cl, dl, m[8], 0x5a827999, 12); bl = rotl(bl, 10)

  // Mj = 3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12
  // K = 0x6ed9eba1
  // Sj = 11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5
  dl = fn3(dl, el, al, bl, cl, m[3], 0x6ed9eba1, 11); al = rotl(al, 10)
  cl = fn3(cl, dl, el, al, bl, m[10], 0x6ed9eba1, 13); el = rotl(el, 10)
  bl = fn3(bl, cl, dl, el, al, m[14], 0x6ed9eba1, 6); dl = rotl(dl, 10)
  al = fn3(al, bl, cl, dl, el, m[4], 0x6ed9eba1, 7); cl = rotl(cl, 10)
  el = fn3(el, al, bl, cl, dl, m[9], 0x6ed9eba1, 14); bl = rotl(bl, 10)
  dl = fn3(dl, el, al, bl, cl, m[15], 0x6ed9eba1, 9); al = rotl(al, 10)
  cl = fn3(cl, dl, el, al, bl, m[8], 0x6ed9eba1, 13); el = rotl(el, 10)
  bl = fn3(bl, cl, dl, el, al, m[1], 0x6ed9eba1, 15); dl = rotl(dl, 10)
  al = fn3(al, bl, cl, dl, el, m[2], 0x6ed9eba1, 14); cl = rotl(cl, 10)
  el = fn3(el, al, bl, cl, dl, m[7], 0x6ed9eba1, 8); bl = rotl(bl, 10)
  dl = fn3(dl, el, al, bl, cl, m[0], 0x6ed9eba1, 13); al = rotl(al, 10)
  cl = fn3(cl, dl, el, al, bl, m[6], 0x6ed9eba1, 6); el = rotl(el, 10)
  bl = fn3(bl, cl, dl, el, al, m[13], 0x6ed9eba1, 5); dl = rotl(dl, 10)
  al = fn3(al, bl, cl, dl, el, m[11], 0x6ed9eba1, 12); cl = rotl(cl, 10)
  el = fn3(el, al, bl, cl, dl, m[5], 0x6ed9eba1, 7); bl = rotl(bl, 10)
  dl = fn3(dl, el, al, bl, cl, m[12], 0x6ed9eba1, 5); al = rotl(al, 10)

  // Mj = 1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2
  // K = 0x8f1bbcdc
  // Sj = 11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12
  cl = fn4(cl, dl, el, al, bl, m[1], 0x8f1bbcdc, 11); el = rotl(el, 10)
  bl = fn4(bl, cl, dl, el, al, m[9], 0x8f1bbcdc, 12); dl = rotl(dl, 10)
  al = fn4(al, bl, cl, dl, el, m[11], 0x8f1bbcdc, 14); cl = rotl(cl, 10)
  el = fn4(el, al, bl, cl, dl, m[10], 0x8f1bbcdc, 15); bl = rotl(bl, 10)
  dl = fn4(dl, el, al, bl, cl, m[0], 0x8f1bbcdc, 14); al = rotl(al, 10)
  cl = fn4(cl, dl, el, al, bl, m[8], 0x8f1bbcdc, 15); el = rotl(el, 10)
  bl = fn4(bl, cl, dl, el, al, m[12], 0x8f1bbcdc, 9); dl = rotl(dl, 10)
  al = fn4(al, bl, cl, dl, el, m[4], 0x8f1bbcdc, 8); cl = rotl(cl, 10)
  el = fn4(el, al, bl, cl, dl, m[13], 0x8f1bbcdc, 9); bl = rotl(bl, 10)
  dl = fn4(dl, el, al, bl, cl, m[3], 0x8f1bbcdc, 14); al = rotl(al, 10)
  cl = fn4(cl, dl, el, al, bl, m[7], 0x8f1bbcdc, 5); el = rotl(el, 10)
  bl = fn4(bl, cl, dl, el, al, m[15], 0x8f1bbcdc, 6); dl = rotl(dl, 10)
  al = fn4(al, bl, cl, dl, el, m[14], 0x8f1bbcdc, 8); cl = rotl(cl, 10)
  el = fn4(el, al, bl, cl, dl, m[5], 0x8f1bbcdc, 6); bl = rotl(bl, 10)
  dl = fn4(dl, el, al, bl, cl, m[6], 0x8f1bbcdc, 5); al = rotl(al, 10)
  cl = fn4(cl, dl, el, al, bl, m[2], 0x8f1bbcdc, 12); el = rotl(el, 10)

  // Mj = 4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13
  // K = 0xa953fd4e
  // Sj = 9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6
  bl = fn5(bl, cl, dl, el, al, m[4], 0xa953fd4e, 9); dl = rotl(dl, 10)
  al = fn5(al, bl, cl, dl, el, m[0], 0xa953fd4e, 15); cl = rotl(cl, 10)
  el = fn5(el, al, bl, cl, dl, m[5], 0xa953fd4e, 5); bl = rotl(bl, 10)
  dl = fn5(dl, el, al, bl, cl, m[9], 0xa953fd4e, 11); al = rotl(al, 10)
  cl = fn5(cl, dl, el, al, bl, m[7], 0xa953fd4e, 6); el = rotl(el, 10)
  bl = fn5(bl, cl, dl, el, al, m[12], 0xa953fd4e, 8); dl = rotl(dl, 10)
  al = fn5(al, bl, cl, dl, el, m[2], 0xa953fd4e, 13); cl = rotl(cl, 10)
  el = fn5(el, al, bl, cl, dl, m[10], 0xa953fd4e, 12); bl = rotl(bl, 10)
  dl = fn5(dl, el, al, bl, cl, m[14], 0xa953fd4e, 5); al = rotl(al, 10)
  cl = fn5(cl, dl, el, al, bl, m[1], 0xa953fd4e, 12); el = rotl(el, 10)
  bl = fn5(bl, cl, dl, el, al, m[3], 0xa953fd4e, 13); dl = rotl(dl, 10)
  al = fn5(al, bl, cl, dl, el, m[8], 0xa953fd4e, 14); cl = rotl(cl, 10)
  el = fn5(el, al, bl, cl, dl, m[11], 0xa953fd4e, 11); bl = rotl(bl, 10)
  dl = fn5(dl, el, al, bl, cl, m[6], 0xa953fd4e, 8); al = rotl(al, 10)
  cl = fn5(cl, dl, el, al, bl, m[15], 0xa953fd4e, 5); el = rotl(el, 10)
  bl = fn5(bl, cl, dl, el, al, m[13], 0xa953fd4e, 6); dl = rotl(dl, 10)

  var ar = this._a
  var br = this._b
  var cr = this._c
  var dr = this._d
  var er = this._e

  // M'j = 5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12
  // K' = 0x50a28be6
  // S'j = 8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6
  ar = fn5(ar, br, cr, dr, er, m[5], 0x50a28be6, 8); cr = rotl(cr, 10)
  er = fn5(er, ar, br, cr, dr, m[14], 0x50a28be6, 9); br = rotl(br, 10)
  dr = fn5(dr, er, ar, br, cr, m[7], 0x50a28be6, 9); ar = rotl(ar, 10)
  cr = fn5(cr, dr, er, ar, br, m[0], 0x50a28be6, 11); er = rotl(er, 10)
  br = fn5(br, cr, dr, er, ar, m[9], 0x50a28be6, 13); dr = rotl(dr, 10)
  ar = fn5(ar, br, cr, dr, er, m[2], 0x50a28be6, 15); cr = rotl(cr, 10)
  er = fn5(er, ar, br, cr, dr, m[11], 0x50a28be6, 15); br = rotl(br, 10)
  dr = fn5(dr, er, ar, br, cr, m[4], 0x50a28be6, 5); ar = rotl(ar, 10)
  cr = fn5(cr, dr, er, ar, br, m[13], 0x50a28be6, 7); er = rotl(er, 10)
  br = fn5(br, cr, dr, er, ar, m[6], 0x50a28be6, 7); dr = rotl(dr, 10)
  ar = fn5(ar, br, cr, dr, er, m[15], 0x50a28be6, 8); cr = rotl(cr, 10)
  er = fn5(er, ar, br, cr, dr, m[8], 0x50a28be6, 11); br = rotl(br, 10)
  dr = fn5(dr, er, ar, br, cr, m[1], 0x50a28be6, 14); ar = rotl(ar, 10)
  cr = fn5(cr, dr, er, ar, br, m[10], 0x50a28be6, 14); er = rotl(er, 10)
  br = fn5(br, cr, dr, er, ar, m[3], 0x50a28be6, 12); dr = rotl(dr, 10)
  ar = fn5(ar, br, cr, dr, er, m[12], 0x50a28be6, 6); cr = rotl(cr, 10)

  // M'j = 6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2
  // K' = 0x5c4dd124
  // S'j = 9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11
  er = fn4(er, ar, br, cr, dr, m[6], 0x5c4dd124, 9); br = rotl(br, 10)
  dr = fn4(dr, er, ar, br, cr, m[11], 0x5c4dd124, 13); ar = rotl(ar, 10)
  cr = fn4(cr, dr, er, ar, br, m[3], 0x5c4dd124, 15); er = rotl(er, 10)
  br = fn4(br, cr, dr, er, ar, m[7], 0x5c4dd124, 7); dr = rotl(dr, 10)
  ar = fn4(ar, br, cr, dr, er, m[0], 0x5c4dd124, 12); cr = rotl(cr, 10)
  er = fn4(er, ar, br, cr, dr, m[13], 0x5c4dd124, 8); br = rotl(br, 10)
  dr = fn4(dr, er, ar, br, cr, m[5], 0x5c4dd124, 9); ar = rotl(ar, 10)
  cr = fn4(cr, dr, er, ar, br, m[10], 0x5c4dd124, 11); er = rotl(er, 10)
  br = fn4(br, cr, dr, er, ar, m[14], 0x5c4dd124, 7); dr = rotl(dr, 10)
  ar = fn4(ar, br, cr, dr, er, m[15], 0x5c4dd124, 7); cr = rotl(cr, 10)
  er = fn4(er, ar, br, cr, dr, m[8], 0x5c4dd124, 12); br = rotl(br, 10)
  dr = fn4(dr, er, ar, br, cr, m[12], 0x5c4dd124, 7); ar = rotl(ar, 10)
  cr = fn4(cr, dr, er, ar, br, m[4], 0x5c4dd124, 6); er = rotl(er, 10)
  br = fn4(br, cr, dr, er, ar, m[9], 0x5c4dd124, 15); dr = rotl(dr, 10)
  ar = fn4(ar, br, cr, dr, er, m[1], 0x5c4dd124, 13); cr = rotl(cr, 10)
  er = fn4(er, ar, br, cr, dr, m[2], 0x5c4dd124, 11); br = rotl(br, 10)

  // M'j = 15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13
  // K' = 0x6d703ef3
  // S'j = 9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5
  dr = fn3(dr, er, ar, br, cr, m[15], 0x6d703ef3, 9); ar = rotl(ar, 10)
  cr = fn3(cr, dr, er, ar, br, m[5], 0x6d703ef3, 7); er = rotl(er, 10)
  br = fn3(br, cr, dr, er, ar, m[1], 0x6d703ef3, 15); dr = rotl(dr, 10)
  ar = fn3(ar, br, cr, dr, er, m[3], 0x6d703ef3, 11); cr = rotl(cr, 10)
  er = fn3(er, ar, br, cr, dr, m[7], 0x6d703ef3, 8); br = rotl(br, 10)
  dr = fn3(dr, er, ar, br, cr, m[14], 0x6d703ef3, 6); ar = rotl(ar, 10)
  cr = fn3(cr, dr, er, ar, br, m[6], 0x6d703ef3, 6); er = rotl(er, 10)
  br = fn3(br, cr, dr, er, ar, m[9], 0x6d703ef3, 14); dr = rotl(dr, 10)
  ar = fn3(ar, br, cr, dr, er, m[11], 0x6d703ef3, 12); cr = rotl(cr, 10)
  er = fn3(er, ar, br, cr, dr, m[8], 0x6d703ef3, 13); br = rotl(br, 10)
  dr = fn3(dr, er, ar, br, cr, m[12], 0x6d703ef3, 5); ar = rotl(ar, 10)
  cr = fn3(cr, dr, er, ar, br, m[2], 0x6d703ef3, 14); er = rotl(er, 10)
  br = fn3(br, cr, dr, er, ar, m[10], 0x6d703ef3, 13); dr = rotl(dr, 10)
  ar = fn3(ar, br, cr, dr, er, m[0], 0x6d703ef3, 13); cr = rotl(cr, 10)
  er = fn3(er, ar, br, cr, dr, m[4], 0x6d703ef3, 7); br = rotl(br, 10)
  dr = fn3(dr, er, ar, br, cr, m[13], 0x6d703ef3, 5); ar = rotl(ar, 10)

  // M'j = 8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14
  // K' = 0x7a6d76e9
  // S'j = 15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8
  cr = fn2(cr, dr, er, ar, br, m[8], 0x7a6d76e9, 15); er = rotl(er, 10)
  br = fn2(br, cr, dr, er, ar, m[6], 0x7a6d76e9, 5); dr = rotl(dr, 10)
  ar = fn2(ar, br, cr, dr, er, m[4], 0x7a6d76e9, 8); cr = rotl(cr, 10)
  er = fn2(er, ar, br, cr, dr, m[1], 0x7a6d76e9, 11); br = rotl(br, 10)
  dr = fn2(dr, er, ar, br, cr, m[3], 0x7a6d76e9, 14); ar = rotl(ar, 10)
  cr = fn2(cr, dr, er, ar, br, m[11], 0x7a6d76e9, 14); er = rotl(er, 10)
  br = fn2(br, cr, dr, er, ar, m[15], 0x7a6d76e9, 6); dr = rotl(dr, 10)
  ar = fn2(ar, br, cr, dr, er, m[0], 0x7a6d76e9, 14); cr = rotl(cr, 10)
  er = fn2(er, ar, br, cr, dr, m[5], 0x7a6d76e9, 6); br = rotl(br, 10)
  dr = fn2(dr, er, ar, br, cr, m[12], 0x7a6d76e9, 9); ar = rotl(ar, 10)
  cr = fn2(cr, dr, er, ar, br, m[2], 0x7a6d76e9, 12); er = rotl(er, 10)
  br = fn2(br, cr, dr, er, ar, m[13], 0x7a6d76e9, 9); dr = rotl(dr, 10)
  ar = fn2(ar, br, cr, dr, er, m[9], 0x7a6d76e9, 12); cr = rotl(cr, 10)
  er = fn2(er, ar, br, cr, dr, m[7], 0x7a6d76e9, 5); br = rotl(br, 10)
  dr = fn2(dr, er, ar, br, cr, m[10], 0x7a6d76e9, 15); ar = rotl(ar, 10)
  cr = fn2(cr, dr, er, ar, br, m[14], 0x7a6d76e9, 8); er = rotl(er, 10)

  // M'j = 12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11
  // K' = 0x00000000
  // S'j = 8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11
  br = fn1(br, cr, dr, er, ar, m[12], 0x00000000, 8); dr = rotl(dr, 10)
  ar = fn1(ar, br, cr, dr, er, m[15], 0x00000000, 5); cr = rotl(cr, 10)
  er = fn1(er, ar, br, cr, dr, m[10], 0x00000000, 12); br = rotl(br, 10)
  dr = fn1(dr, er, ar, br, cr, m[4], 0x00000000, 9); ar = rotl(ar, 10)
  cr = fn1(cr, dr, er, ar, br, m[1], 0x00000000, 12); er = rotl(er, 10)
  br = fn1(br, cr, dr, er, ar, m[5], 0x00000000, 5); dr = rotl(dr, 10)
  ar = fn1(ar, br, cr, dr, er, m[8], 0x00000000, 14); cr = rotl(cr, 10)
  er = fn1(er, ar, br, cr, dr, m[7], 0x00000000, 6); br = rotl(br, 10)
  dr = fn1(dr, er, ar, br, cr, m[6], 0x00000000, 8); ar = rotl(ar, 10)
  cr = fn1(cr, dr, er, ar, br, m[2], 0x00000000, 13); er = rotl(er, 10)
  br = fn1(br, cr, dr, er, ar, m[13], 0x00000000, 6); dr = rotl(dr, 10)
  ar = fn1(ar, br, cr, dr, er, m[14], 0x00000000, 5); cr = rotl(cr, 10)
  er = fn1(er, ar, br, cr, dr, m[0], 0x00000000, 15); br = rotl(br, 10)
  dr = fn1(dr, er, ar, br, cr, m[3], 0x00000000, 13); ar = rotl(ar, 10)
  cr = fn1(cr, dr, er, ar, br, m[9], 0x00000000, 11); er = rotl(er, 10)
  br = fn1(br, cr, dr, er, ar, m[11], 0x00000000, 11); dr = rotl(dr, 10)

  // change state
  var t = (this._b + cl + dr) | 0
  this._b = (this._c + dl + er) | 0
  this._c = (this._d + el + ar) | 0
  this._d = (this._e + al + br) | 0
  this._e = (this._a + bl + cr) | 0
  this._a = t
}

RIPEMD160.prototype._digest = function () {
  // create padding and handle blocks
  this._block[this._blockOffset++] = 0x80
  if (this._blockOffset > 56) {
    this._block.fill(0, this._blockOffset, 64)
    this._update()
    this._blockOffset = 0
  }

  this._block.fill(0, this._blockOffset, 56)
  this._block.writeUInt32LE(this._length[0], 56)
  this._block.writeUInt32LE(this._length[1], 60)
  this._update()

  // produce result
  var buffer = new Buffer(20)
  buffer.writeInt32LE(this._a, 0)
  buffer.writeInt32LE(this._b, 4)
  buffer.writeInt32LE(this._c, 8)
  buffer.writeInt32LE(this._d, 12)
  buffer.writeInt32LE(this._e, 16)
  return buffer
}

function rotl (x, n) {
  return (x << n) | (x >>> (32 - n))
}

function fn1 (a, b, c, d, e, m, k, s) {
  return (rotl((a + (b ^ c ^ d) + m + k) | 0, s) + e) | 0
}

function fn2 (a, b, c, d, e, m, k, s) {
  return (rotl((a + ((b & c) | ((~b) & d)) + m + k) | 0, s) + e) | 0
}

function fn3 (a, b, c, d, e, m, k, s) {
  return (rotl((a + ((b | (~c)) ^ d) + m + k) | 0, s) + e) | 0
}

function fn4 (a, b, c, d, e, m, k, s) {
  return (rotl((a + ((b & d) | (c & (~d))) + m + k) | 0, s) + e) | 0
}

function fn5 (a, b, c, d, e, m, k, s) {
  return (rotl((a + (b ^ (c | (~d))) + m + k) | 0, s) + e) | 0
}

module.exports = RIPEMD160

}).call(this,require("buffer").Buffer)
},{"buffer":24,"hash-base":29,"inherits":31}],51:[function(require,module,exports){
/* eslint-disable node/no-deprecated-api */
var buffer = require('buffer')
var Buffer = buffer.Buffer

// alternative to using Object.keys for old browsers
function copyProps (src, dst) {
  for (var key in src) {
    dst[key] = src[key]
  }
}
if (Buffer.from && Buffer.alloc && Buffer.allocUnsafe && Buffer.allocUnsafeSlow) {
  module.exports = buffer
} else {
  // Copy properties from require('buffer')
  copyProps(buffer, exports)
  exports.Buffer = SafeBuffer
}

function SafeBuffer (arg, encodingOrOffset, length) {
  return Buffer(arg, encodingOrOffset, length)
}

// Copy static methods from Buffer
copyProps(Buffer, SafeBuffer)

SafeBuffer.from = function (arg, encodingOrOffset, length) {
  if (typeof arg === 'number') {
    throw new TypeError('Argument must not be a number')
  }
  return Buffer(arg, encodingOrOffset, length)
}

SafeBuffer.alloc = function (size, fill, encoding) {
  if (typeof size !== 'number') {
    throw new TypeError('Argument must be a number')
  }
  var buf = Buffer(size)
  if (fill !== undefined) {
    if (typeof encoding === 'string') {
      buf.fill(fill, encoding)
    } else {
      buf.fill(fill)
    }
  } else {
    buf.fill(0)
  }
  return buf
}

SafeBuffer.allocUnsafe = function (size) {
  if (typeof size !== 'number') {
    throw new TypeError('Argument must be a number')
  }
  return Buffer(size)
}

SafeBuffer.allocUnsafeSlow = function (size) {
  if (typeof size !== 'number') {
    throw new TypeError('Argument must be a number')
  }
  return buffer.SlowBuffer(size)
}

},{"buffer":24}],52:[function(require,module,exports){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

module.exports = Stream;

var EE = require('events').EventEmitter;
var inherits = require('inherits');

inherits(Stream, EE);
Stream.Readable = require('readable-stream/readable.js');
Stream.Writable = require('readable-stream/writable.js');
Stream.Duplex = require('readable-stream/duplex.js');
Stream.Transform = require('readable-stream/transform.js');
Stream.PassThrough = require('readable-stream/passthrough.js');

// Backwards-compat with node 0.4.x
Stream.Stream = Stream;



// old-style streams.  Note that the pipe method (the only relevant
// part of this class) is overridden in the Readable class.

function Stream() {
  EE.call(this);
}

Stream.prototype.pipe = function(dest, options) {
  var source = this;

  function ondata(chunk) {
    if (dest.writable) {
      if (false === dest.write(chunk) && source.pause) {
        source.pause();
      }
    }
  }

  source.on('data', ondata);

  function ondrain() {
    if (source.readable && source.resume) {
      source.resume();
    }
  }

  dest.on('drain', ondrain);

  // If the 'end' option is not supplied, dest.end() will be called when
  // source gets the 'end' or 'close' events.  Only dest.end() once.
  if (!dest._isStdio && (!options || options.end !== false)) {
    source.on('end', onend);
    source.on('close', onclose);
  }

  var didOnEnd = false;
  function onend() {
    if (didOnEnd) return;
    didOnEnd = true;

    dest.end();
  }


  function onclose() {
    if (didOnEnd) return;
    didOnEnd = true;

    if (typeof dest.destroy === 'function') dest.destroy();
  }

  // don't leave dangling pipes when there are errors.
  function onerror(er) {
    cleanup();
    if (EE.listenerCount(this, 'error') === 0) {
      throw er; // Unhandled stream error in pipe.
    }
  }

  source.on('error', onerror);
  dest.on('error', onerror);

  // remove all the event listeners that were added.
  function cleanup() {
    source.removeListener('data', ondata);
    dest.removeListener('drain', ondrain);

    source.removeListener('end', onend);
    source.removeListener('close', onclose);

    source.removeListener('error', onerror);
    dest.removeListener('error', onerror);

    source.removeListener('end', cleanup);
    source.removeListener('close', cleanup);

    dest.removeListener('close', cleanup);
  }

  source.on('end', cleanup);
  source.on('close', cleanup);

  dest.on('close', cleanup);

  dest.emit('pipe', source);

  // Allow for unix-like usage: A.pipe(B).pipe(C)
  return dest;
};

},{"events":27,"inherits":31,"readable-stream/duplex.js":37,"readable-stream/passthrough.js":46,"readable-stream/readable.js":47,"readable-stream/transform.js":48,"readable-stream/writable.js":49}],53:[function(require,module,exports){
'use strict';

var Buffer = require('safe-buffer').Buffer;

var isEncoding = Buffer.isEncoding || function (encoding) {
  encoding = '' + encoding;
  switch (encoding && encoding.toLowerCase()) {
    case 'hex':case 'utf8':case 'utf-8':case 'ascii':case 'binary':case 'base64':case 'ucs2':case 'ucs-2':case 'utf16le':case 'utf-16le':case 'raw':
      return true;
    default:
      return false;
  }
};

function _normalizeEncoding(enc) {
  if (!enc) return 'utf8';
  var retried;
  while (true) {
    switch (enc) {
      case 'utf8':
      case 'utf-8':
        return 'utf8';
      case 'ucs2':
      case 'ucs-2':
      case 'utf16le':
      case 'utf-16le':
        return 'utf16le';
      case 'latin1':
      case 'binary':
        return 'latin1';
      case 'base64':
      case 'ascii':
      case 'hex':
        return enc;
      default:
        if (retried) return; // undefined
        enc = ('' + enc).toLowerCase();
        retried = true;
    }
  }
};

// Do not cache `Buffer.isEncoding` when checking encoding names as some
// modules monkey-patch it to support additional encodings
function normalizeEncoding(enc) {
  var nenc = _normalizeEncoding(enc);
  if (typeof nenc !== 'string' && (Buffer.isEncoding === isEncoding || !isEncoding(enc))) throw new Error('Unknown encoding: ' + enc);
  return nenc || enc;
}

// StringDecoder provides an interface for efficiently splitting a series of
// buffers into a series of JS strings without breaking apart multi-byte
// characters.
exports.StringDecoder = StringDecoder;
function StringDecoder(encoding) {
  this.encoding = normalizeEncoding(encoding);
  var nb;
  switch (this.encoding) {
    case 'utf16le':
      this.text = utf16Text;
      this.end = utf16End;
      nb = 4;
      break;
    case 'utf8':
      this.fillLast = utf8FillLast;
      nb = 4;
      break;
    case 'base64':
      this.text = base64Text;
      this.end = base64End;
      nb = 3;
      break;
    default:
      this.write = simpleWrite;
      this.end = simpleEnd;
      return;
  }
  this.lastNeed = 0;
  this.lastTotal = 0;
  this.lastChar = Buffer.allocUnsafe(nb);
}

StringDecoder.prototype.write = function (buf) {
  if (buf.length === 0) return '';
  var r;
  var i;
  if (this.lastNeed) {
    r = this.fillLast(buf);
    if (r === undefined) return '';
    i = this.lastNeed;
    this.lastNeed = 0;
  } else {
    i = 0;
  }
  if (i < buf.length) return r ? r + this.text(buf, i) : this.text(buf, i);
  return r || '';
};

StringDecoder.prototype.end = utf8End;

// Returns only complete characters in a Buffer
StringDecoder.prototype.text = utf8Text;

// Attempts to complete a partial non-UTF-8 character using bytes from a Buffer
StringDecoder.prototype.fillLast = function (buf) {
  if (this.lastNeed <= buf.length) {
    buf.copy(this.lastChar, this.lastTotal - this.lastNeed, 0, this.lastNeed);
    return this.lastChar.toString(this.encoding, 0, this.lastTotal);
  }
  buf.copy(this.lastChar, this.lastTotal - this.lastNeed, 0, buf.length);
  this.lastNeed -= buf.length;
};

// Checks the type of a UTF-8 byte, whether it's ASCII, a leading byte, or a
// continuation byte.
function utf8CheckByte(byte) {
  if (byte <= 0x7F) return 0;else if (byte >> 5 === 0x06) return 2;else if (byte >> 4 === 0x0E) return 3;else if (byte >> 3 === 0x1E) return 4;
  return -1;
}

// Checks at most 3 bytes at the end of a Buffer in order to detect an
// incomplete multi-byte UTF-8 character. The total number of bytes (2, 3, or 4)
// needed to complete the UTF-8 character (if applicable) are returned.
function utf8CheckIncomplete(self, buf, i) {
  var j = buf.length - 1;
  if (j < i) return 0;
  var nb = utf8CheckByte(buf[j]);
  if (nb >= 0) {
    if (nb > 0) self.lastNeed = nb - 1;
    return nb;
  }
  if (--j < i) return 0;
  nb = utf8CheckByte(buf[j]);
  if (nb >= 0) {
    if (nb > 0) self.lastNeed = nb - 2;
    return nb;
  }
  if (--j < i) return 0;
  nb = utf8CheckByte(buf[j]);
  if (nb >= 0) {
    if (nb > 0) {
      if (nb === 2) nb = 0;else self.lastNeed = nb - 3;
    }
    return nb;
  }
  return 0;
}

// Validates as many continuation bytes for a multi-byte UTF-8 character as
// needed or are available. If we see a non-continuation byte where we expect
// one, we "replace" the validated continuation bytes we've seen so far with
// UTF-8 replacement characters ('\ufffd'), to match v8's UTF-8 decoding
// behavior. The continuation byte check is included three times in the case
// where all of the continuation bytes for a character exist in the same buffer.
// It is also done this way as a slight performance increase instead of using a
// loop.
function utf8CheckExtraBytes(self, buf, p) {
  if ((buf[0] & 0xC0) !== 0x80) {
    self.lastNeed = 0;
    return '\ufffd'.repeat(p);
  }
  if (self.lastNeed > 1 && buf.length > 1) {
    if ((buf[1] & 0xC0) !== 0x80) {
      self.lastNeed = 1;
      return '\ufffd'.repeat(p + 1);
    }
    if (self.lastNeed > 2 && buf.length > 2) {
      if ((buf[2] & 0xC0) !== 0x80) {
        self.lastNeed = 2;
        return '\ufffd'.repeat(p + 2);
      }
    }
  }
}

// Attempts to complete a multi-byte UTF-8 character using bytes from a Buffer.
function utf8FillLast(buf) {
  var p = this.lastTotal - this.lastNeed;
  var r = utf8CheckExtraBytes(this, buf, p);
  if (r !== undefined) return r;
  if (this.lastNeed <= buf.length) {
    buf.copy(this.lastChar, p, 0, this.lastNeed);
    return this.lastChar.toString(this.encoding, 0, this.lastTotal);
  }
  buf.copy(this.lastChar, p, 0, buf.length);
  this.lastNeed -= buf.length;
}

// Returns all complete UTF-8 characters in a Buffer. If the Buffer ended on a
// partial character, the character's bytes are buffered until the required
// number of bytes are available.
function utf8Text(buf, i) {
  var total = utf8CheckIncomplete(this, buf, i);
  if (!this.lastNeed) return buf.toString('utf8', i);
  this.lastTotal = total;
  var end = buf.length - (total - this.lastNeed);
  buf.copy(this.lastChar, 0, end);
  return buf.toString('utf8', i, end);
}

// For UTF-8, a replacement character for each buffered byte of a (partial)
// character needs to be added to the output.
function utf8End(buf) {
  var r = buf && buf.length ? this.write(buf) : '';
  if (this.lastNeed) return r + '\ufffd'.repeat(this.lastTotal - this.lastNeed);
  return r;
}

// UTF-16LE typically needs two bytes per character, but even if we have an even
// number of bytes available, we need to check if we end on a leading/high
// surrogate. In that case, we need to wait for the next two bytes in order to
// decode the last character properly.
function utf16Text(buf, i) {
  if ((buf.length - i) % 2 === 0) {
    var r = buf.toString('utf16le', i);
    if (r) {
      var c = r.charCodeAt(r.length - 1);
      if (c >= 0xD800 && c <= 0xDBFF) {
        this.lastNeed = 2;
        this.lastTotal = 4;
        this.lastChar[0] = buf[buf.length - 2];
        this.lastChar[1] = buf[buf.length - 1];
        return r.slice(0, -1);
      }
    }
    return r;
  }
  this.lastNeed = 1;
  this.lastTotal = 2;
  this.lastChar[0] = buf[buf.length - 1];
  return buf.toString('utf16le', i, buf.length - 1);
}

// For UTF-16LE we do not explicitly append special replacement characters if we
// end on a partial character, we simply let v8 handle that.
function utf16End(buf) {
  var r = buf && buf.length ? this.write(buf) : '';
  if (this.lastNeed) {
    var end = this.lastTotal - this.lastNeed;
    return r + this.lastChar.toString('utf16le', 0, end);
  }
  return r;
}

function base64Text(buf, i) {
  var n = (buf.length - i) % 3;
  if (n === 0) return buf.toString('base64', i);
  this.lastNeed = 3 - n;
  this.lastTotal = 3;
  if (n === 1) {
    this.lastChar[0] = buf[buf.length - 1];
  } else {
    this.lastChar[0] = buf[buf.length - 2];
    this.lastChar[1] = buf[buf.length - 1];
  }
  return buf.toString('base64', i, buf.length - n);
}

function base64End(buf) {
  var r = buf && buf.length ? this.write(buf) : '';
  if (this.lastNeed) return r + this.lastChar.toString('base64', 0, 3 - this.lastNeed);
  return r;
}

// Pass bytes on through for single-byte encodings (e.g. ascii, latin1, hex)
function simpleWrite(buf) {
  return buf.toString(this.encoding);
}

function simpleEnd(buf) {
  return buf && buf.length ? this.write(buf) : '';
}
},{"safe-buffer":51}],54:[function(require,module,exports){
(function(nacl) {
'use strict';

// Ported in 2014 by Dmitry Chestnykh and Devi Mandiri.
// Public domain.
//
// Implementation derived from TweetNaCl version 20140427.
// See for details: http://tweetnacl.cr.yp.to/

var gf = function(init) {
  var i, r = new Float64Array(16);
  if (init) for (i = 0; i < init.length; i++) r[i] = init[i];
  return r;
};

//  Pluggable, initialized in high-level API below.
var randombytes = function(/* x, n */) { throw new Error('no PRNG'); };

var _0 = new Uint8Array(16);
var _9 = new Uint8Array(32); _9[0] = 9;

var gf0 = gf(),
    gf1 = gf([1]),
    _121665 = gf([0xdb41, 1]),
    D = gf([0x78a3, 0x1359, 0x4dca, 0x75eb, 0xd8ab, 0x4141, 0x0a4d, 0x0070, 0xe898, 0x7779, 0x4079, 0x8cc7, 0xfe73, 0x2b6f, 0x6cee, 0x5203]),
    D2 = gf([0xf159, 0x26b2, 0x9b94, 0xebd6, 0xb156, 0x8283, 0x149a, 0x00e0, 0xd130, 0xeef3, 0x80f2, 0x198e, 0xfce7, 0x56df, 0xd9dc, 0x2406]),
    X = gf([0xd51a, 0x8f25, 0x2d60, 0xc956, 0xa7b2, 0x9525, 0xc760, 0x692c, 0xdc5c, 0xfdd6, 0xe231, 0xc0a4, 0x53fe, 0xcd6e, 0x36d3, 0x2169]),
    Y = gf([0x6658, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666]),
    I = gf([0xa0b0, 0x4a0e, 0x1b27, 0xc4ee, 0xe478, 0xad2f, 0x1806, 0x2f43, 0xd7a7, 0x3dfb, 0x0099, 0x2b4d, 0xdf0b, 0x4fc1, 0x2480, 0x2b83]);

function ts64(x, i, h, l) {
  x[i]   = (h >> 24) & 0xff;
  x[i+1] = (h >> 16) & 0xff;
  x[i+2] = (h >>  8) & 0xff;
  x[i+3] = h & 0xff;
  x[i+4] = (l >> 24)  & 0xff;
  x[i+5] = (l >> 16)  & 0xff;
  x[i+6] = (l >>  8)  & 0xff;
  x[i+7] = l & 0xff;
}

function vn(x, xi, y, yi, n) {
  var i,d = 0;
  for (i = 0; i < n; i++) d |= x[xi+i]^y[yi+i];
  return (1 & ((d - 1) >>> 8)) - 1;
}

function crypto_verify_16(x, xi, y, yi) {
  return vn(x,xi,y,yi,16);
}

function crypto_verify_32(x, xi, y, yi) {
  return vn(x,xi,y,yi,32);
}

function core_salsa20(o, p, k, c) {
  var j0  = c[ 0] & 0xff | (c[ 1] & 0xff)<<8 | (c[ 2] & 0xff)<<16 | (c[ 3] & 0xff)<<24,
      j1  = k[ 0] & 0xff | (k[ 1] & 0xff)<<8 | (k[ 2] & 0xff)<<16 | (k[ 3] & 0xff)<<24,
      j2  = k[ 4] & 0xff | (k[ 5] & 0xff)<<8 | (k[ 6] & 0xff)<<16 | (k[ 7] & 0xff)<<24,
      j3  = k[ 8] & 0xff | (k[ 9] & 0xff)<<8 | (k[10] & 0xff)<<16 | (k[11] & 0xff)<<24,
      j4  = k[12] & 0xff | (k[13] & 0xff)<<8 | (k[14] & 0xff)<<16 | (k[15] & 0xff)<<24,
      j5  = c[ 4] & 0xff | (c[ 5] & 0xff)<<8 | (c[ 6] & 0xff)<<16 | (c[ 7] & 0xff)<<24,
      j6  = p[ 0] & 0xff | (p[ 1] & 0xff)<<8 | (p[ 2] & 0xff)<<16 | (p[ 3] & 0xff)<<24,
      j7  = p[ 4] & 0xff | (p[ 5] & 0xff)<<8 | (p[ 6] & 0xff)<<16 | (p[ 7] & 0xff)<<24,
      j8  = p[ 8] & 0xff | (p[ 9] & 0xff)<<8 | (p[10] & 0xff)<<16 | (p[11] & 0xff)<<24,
      j9  = p[12] & 0xff | (p[13] & 0xff)<<8 | (p[14] & 0xff)<<16 | (p[15] & 0xff)<<24,
      j10 = c[ 8] & 0xff | (c[ 9] & 0xff)<<8 | (c[10] & 0xff)<<16 | (c[11] & 0xff)<<24,
      j11 = k[16] & 0xff | (k[17] & 0xff)<<8 | (k[18] & 0xff)<<16 | (k[19] & 0xff)<<24,
      j12 = k[20] & 0xff | (k[21] & 0xff)<<8 | (k[22] & 0xff)<<16 | (k[23] & 0xff)<<24,
      j13 = k[24] & 0xff | (k[25] & 0xff)<<8 | (k[26] & 0xff)<<16 | (k[27] & 0xff)<<24,
      j14 = k[28] & 0xff | (k[29] & 0xff)<<8 | (k[30] & 0xff)<<16 | (k[31] & 0xff)<<24,
      j15 = c[12] & 0xff | (c[13] & 0xff)<<8 | (c[14] & 0xff)<<16 | (c[15] & 0xff)<<24;

  var x0 = j0, x1 = j1, x2 = j2, x3 = j3, x4 = j4, x5 = j5, x6 = j6, x7 = j7,
      x8 = j8, x9 = j9, x10 = j10, x11 = j11, x12 = j12, x13 = j13, x14 = j14,
      x15 = j15, u;

  for (var i = 0; i < 20; i += 2) {
    u = x0 + x12 | 0;
    x4 ^= u<<7 | u>>>(32-7);
    u = x4 + x0 | 0;
    x8 ^= u<<9 | u>>>(32-9);
    u = x8 + x4 | 0;
    x12 ^= u<<13 | u>>>(32-13);
    u = x12 + x8 | 0;
    x0 ^= u<<18 | u>>>(32-18);

    u = x5 + x1 | 0;
    x9 ^= u<<7 | u>>>(32-7);
    u = x9 + x5 | 0;
    x13 ^= u<<9 | u>>>(32-9);
    u = x13 + x9 | 0;
    x1 ^= u<<13 | u>>>(32-13);
    u = x1 + x13 | 0;
    x5 ^= u<<18 | u>>>(32-18);

    u = x10 + x6 | 0;
    x14 ^= u<<7 | u>>>(32-7);
    u = x14 + x10 | 0;
    x2 ^= u<<9 | u>>>(32-9);
    u = x2 + x14 | 0;
    x6 ^= u<<13 | u>>>(32-13);
    u = x6 + x2 | 0;
    x10 ^= u<<18 | u>>>(32-18);

    u = x15 + x11 | 0;
    x3 ^= u<<7 | u>>>(32-7);
    u = x3 + x15 | 0;
    x7 ^= u<<9 | u>>>(32-9);
    u = x7 + x3 | 0;
    x11 ^= u<<13 | u>>>(32-13);
    u = x11 + x7 | 0;
    x15 ^= u<<18 | u>>>(32-18);

    u = x0 + x3 | 0;
    x1 ^= u<<7 | u>>>(32-7);
    u = x1 + x0 | 0;
    x2 ^= u<<9 | u>>>(32-9);
    u = x2 + x1 | 0;
    x3 ^= u<<13 | u>>>(32-13);
    u = x3 + x2 | 0;
    x0 ^= u<<18 | u>>>(32-18);

    u = x5 + x4 | 0;
    x6 ^= u<<7 | u>>>(32-7);
    u = x6 + x5 | 0;
    x7 ^= u<<9 | u>>>(32-9);
    u = x7 + x6 | 0;
    x4 ^= u<<13 | u>>>(32-13);
    u = x4 + x7 | 0;
    x5 ^= u<<18 | u>>>(32-18);

    u = x10 + x9 | 0;
    x11 ^= u<<7 | u>>>(32-7);
    u = x11 + x10 | 0;
    x8 ^= u<<9 | u>>>(32-9);
    u = x8 + x11 | 0;
    x9 ^= u<<13 | u>>>(32-13);
    u = x9 + x8 | 0;
    x10 ^= u<<18 | u>>>(32-18);

    u = x15 + x14 | 0;
    x12 ^= u<<7 | u>>>(32-7);
    u = x12 + x15 | 0;
    x13 ^= u<<9 | u>>>(32-9);
    u = x13 + x12 | 0;
    x14 ^= u<<13 | u>>>(32-13);
    u = x14 + x13 | 0;
    x15 ^= u<<18 | u>>>(32-18);
  }
   x0 =  x0 +  j0 | 0;
   x1 =  x1 +  j1 | 0;
   x2 =  x2 +  j2 | 0;
   x3 =  x3 +  j3 | 0;
   x4 =  x4 +  j4 | 0;
   x5 =  x5 +  j5 | 0;
   x6 =  x6 +  j6 | 0;
   x7 =  x7 +  j7 | 0;
   x8 =  x8 +  j8 | 0;
   x9 =  x9 +  j9 | 0;
  x10 = x10 + j10 | 0;
  x11 = x11 + j11 | 0;
  x12 = x12 + j12 | 0;
  x13 = x13 + j13 | 0;
  x14 = x14 + j14 | 0;
  x15 = x15 + j15 | 0;

  o[ 0] = x0 >>>  0 & 0xff;
  o[ 1] = x0 >>>  8 & 0xff;
  o[ 2] = x0 >>> 16 & 0xff;
  o[ 3] = x0 >>> 24 & 0xff;

  o[ 4] = x1 >>>  0 & 0xff;
  o[ 5] = x1 >>>  8 & 0xff;
  o[ 6] = x1 >>> 16 & 0xff;
  o[ 7] = x1 >>> 24 & 0xff;

  o[ 8] = x2 >>>  0 & 0xff;
  o[ 9] = x2 >>>  8 & 0xff;
  o[10] = x2 >>> 16 & 0xff;
  o[11] = x2 >>> 24 & 0xff;

  o[12] = x3 >>>  0 & 0xff;
  o[13] = x3 >>>  8 & 0xff;
  o[14] = x3 >>> 16 & 0xff;
  o[15] = x3 >>> 24 & 0xff;

  o[16] = x4 >>>  0 & 0xff;
  o[17] = x4 >>>  8 & 0xff;
  o[18] = x4 >>> 16 & 0xff;
  o[19] = x4 >>> 24 & 0xff;

  o[20] = x5 >>>  0 & 0xff;
  o[21] = x5 >>>  8 & 0xff;
  o[22] = x5 >>> 16 & 0xff;
  o[23] = x5 >>> 24 & 0xff;

  o[24] = x6 >>>  0 & 0xff;
  o[25] = x6 >>>  8 & 0xff;
  o[26] = x6 >>> 16 & 0xff;
  o[27] = x6 >>> 24 & 0xff;

  o[28] = x7 >>>  0 & 0xff;
  o[29] = x7 >>>  8 & 0xff;
  o[30] = x7 >>> 16 & 0xff;
  o[31] = x7 >>> 24 & 0xff;

  o[32] = x8 >>>  0 & 0xff;
  o[33] = x8 >>>  8 & 0xff;
  o[34] = x8 >>> 16 & 0xff;
  o[35] = x8 >>> 24 & 0xff;

  o[36] = x9 >>>  0 & 0xff;
  o[37] = x9 >>>  8 & 0xff;
  o[38] = x9 >>> 16 & 0xff;
  o[39] = x9 >>> 24 & 0xff;

  o[40] = x10 >>>  0 & 0xff;
  o[41] = x10 >>>  8 & 0xff;
  o[42] = x10 >>> 16 & 0xff;
  o[43] = x10 >>> 24 & 0xff;

  o[44] = x11 >>>  0 & 0xff;
  o[45] = x11 >>>  8 & 0xff;
  o[46] = x11 >>> 16 & 0xff;
  o[47] = x11 >>> 24 & 0xff;

  o[48] = x12 >>>  0 & 0xff;
  o[49] = x12 >>>  8 & 0xff;
  o[50] = x12 >>> 16 & 0xff;
  o[51] = x12 >>> 24 & 0xff;

  o[52] = x13 >>>  0 & 0xff;
  o[53] = x13 >>>  8 & 0xff;
  o[54] = x13 >>> 16 & 0xff;
  o[55] = x13 >>> 24 & 0xff;

  o[56] = x14 >>>  0 & 0xff;
  o[57] = x14 >>>  8 & 0xff;
  o[58] = x14 >>> 16 & 0xff;
  o[59] = x14 >>> 24 & 0xff;

  o[60] = x15 >>>  0 & 0xff;
  o[61] = x15 >>>  8 & 0xff;
  o[62] = x15 >>> 16 & 0xff;
  o[63] = x15 >>> 24 & 0xff;
}

function core_hsalsa20(o,p,k,c) {
  var j0  = c[ 0] & 0xff | (c[ 1] & 0xff)<<8 | (c[ 2] & 0xff)<<16 | (c[ 3] & 0xff)<<24,
      j1  = k[ 0] & 0xff | (k[ 1] & 0xff)<<8 | (k[ 2] & 0xff)<<16 | (k[ 3] & 0xff)<<24,
      j2  = k[ 4] & 0xff | (k[ 5] & 0xff)<<8 | (k[ 6] & 0xff)<<16 | (k[ 7] & 0xff)<<24,
      j3  = k[ 8] & 0xff | (k[ 9] & 0xff)<<8 | (k[10] & 0xff)<<16 | (k[11] & 0xff)<<24,
      j4  = k[12] & 0xff | (k[13] & 0xff)<<8 | (k[14] & 0xff)<<16 | (k[15] & 0xff)<<24,
      j5  = c[ 4] & 0xff | (c[ 5] & 0xff)<<8 | (c[ 6] & 0xff)<<16 | (c[ 7] & 0xff)<<24,
      j6  = p[ 0] & 0xff | (p[ 1] & 0xff)<<8 | (p[ 2] & 0xff)<<16 | (p[ 3] & 0xff)<<24,
      j7  = p[ 4] & 0xff | (p[ 5] & 0xff)<<8 | (p[ 6] & 0xff)<<16 | (p[ 7] & 0xff)<<24,
      j8  = p[ 8] & 0xff | (p[ 9] & 0xff)<<8 | (p[10] & 0xff)<<16 | (p[11] & 0xff)<<24,
      j9  = p[12] & 0xff | (p[13] & 0xff)<<8 | (p[14] & 0xff)<<16 | (p[15] & 0xff)<<24,
      j10 = c[ 8] & 0xff | (c[ 9] & 0xff)<<8 | (c[10] & 0xff)<<16 | (c[11] & 0xff)<<24,
      j11 = k[16] & 0xff | (k[17] & 0xff)<<8 | (k[18] & 0xff)<<16 | (k[19] & 0xff)<<24,
      j12 = k[20] & 0xff | (k[21] & 0xff)<<8 | (k[22] & 0xff)<<16 | (k[23] & 0xff)<<24,
      j13 = k[24] & 0xff | (k[25] & 0xff)<<8 | (k[26] & 0xff)<<16 | (k[27] & 0xff)<<24,
      j14 = k[28] & 0xff | (k[29] & 0xff)<<8 | (k[30] & 0xff)<<16 | (k[31] & 0xff)<<24,
      j15 = c[12] & 0xff | (c[13] & 0xff)<<8 | (c[14] & 0xff)<<16 | (c[15] & 0xff)<<24;

  var x0 = j0, x1 = j1, x2 = j2, x3 = j3, x4 = j4, x5 = j5, x6 = j6, x7 = j7,
      x8 = j8, x9 = j9, x10 = j10, x11 = j11, x12 = j12, x13 = j13, x14 = j14,
      x15 = j15, u;

  for (var i = 0; i < 20; i += 2) {
    u = x0 + x12 | 0;
    x4 ^= u<<7 | u>>>(32-7);
    u = x4 + x0 | 0;
    x8 ^= u<<9 | u>>>(32-9);
    u = x8 + x4 | 0;
    x12 ^= u<<13 | u>>>(32-13);
    u = x12 + x8 | 0;
    x0 ^= u<<18 | u>>>(32-18);

    u = x5 + x1 | 0;
    x9 ^= u<<7 | u>>>(32-7);
    u = x9 + x5 | 0;
    x13 ^= u<<9 | u>>>(32-9);
    u = x13 + x9 | 0;
    x1 ^= u<<13 | u>>>(32-13);
    u = x1 + x13 | 0;
    x5 ^= u<<18 | u>>>(32-18);

    u = x10 + x6 | 0;
    x14 ^= u<<7 | u>>>(32-7);
    u = x14 + x10 | 0;
    x2 ^= u<<9 | u>>>(32-9);
    u = x2 + x14 | 0;
    x6 ^= u<<13 | u>>>(32-13);
    u = x6 + x2 | 0;
    x10 ^= u<<18 | u>>>(32-18);

    u = x15 + x11 | 0;
    x3 ^= u<<7 | u>>>(32-7);
    u = x3 + x15 | 0;
    x7 ^= u<<9 | u>>>(32-9);
    u = x7 + x3 | 0;
    x11 ^= u<<13 | u>>>(32-13);
    u = x11 + x7 | 0;
    x15 ^= u<<18 | u>>>(32-18);

    u = x0 + x3 | 0;
    x1 ^= u<<7 | u>>>(32-7);
    u = x1 + x0 | 0;
    x2 ^= u<<9 | u>>>(32-9);
    u = x2 + x1 | 0;
    x3 ^= u<<13 | u>>>(32-13);
    u = x3 + x2 | 0;
    x0 ^= u<<18 | u>>>(32-18);

    u = x5 + x4 | 0;
    x6 ^= u<<7 | u>>>(32-7);
    u = x6 + x5 | 0;
    x7 ^= u<<9 | u>>>(32-9);
    u = x7 + x6 | 0;
    x4 ^= u<<13 | u>>>(32-13);
    u = x4 + x7 | 0;
    x5 ^= u<<18 | u>>>(32-18);

    u = x10 + x9 | 0;
    x11 ^= u<<7 | u>>>(32-7);
    u = x11 + x10 | 0;
    x8 ^= u<<9 | u>>>(32-9);
    u = x8 + x11 | 0;
    x9 ^= u<<13 | u>>>(32-13);
    u = x9 + x8 | 0;
    x10 ^= u<<18 | u>>>(32-18);

    u = x15 + x14 | 0;
    x12 ^= u<<7 | u>>>(32-7);
    u = x12 + x15 | 0;
    x13 ^= u<<9 | u>>>(32-9);
    u = x13 + x12 | 0;
    x14 ^= u<<13 | u>>>(32-13);
    u = x14 + x13 | 0;
    x15 ^= u<<18 | u>>>(32-18);
  }

  o[ 0] = x0 >>>  0 & 0xff;
  o[ 1] = x0 >>>  8 & 0xff;
  o[ 2] = x0 >>> 16 & 0xff;
  o[ 3] = x0 >>> 24 & 0xff;

  o[ 4] = x5 >>>  0 & 0xff;
  o[ 5] = x5 >>>  8 & 0xff;
  o[ 6] = x5 >>> 16 & 0xff;
  o[ 7] = x5 >>> 24 & 0xff;

  o[ 8] = x10 >>>  0 & 0xff;
  o[ 9] = x10 >>>  8 & 0xff;
  o[10] = x10 >>> 16 & 0xff;
  o[11] = x10 >>> 24 & 0xff;

  o[12] = x15 >>>  0 & 0xff;
  o[13] = x15 >>>  8 & 0xff;
  o[14] = x15 >>> 16 & 0xff;
  o[15] = x15 >>> 24 & 0xff;

  o[16] = x6 >>>  0 & 0xff;
  o[17] = x6 >>>  8 & 0xff;
  o[18] = x6 >>> 16 & 0xff;
  o[19] = x6 >>> 24 & 0xff;

  o[20] = x7 >>>  0 & 0xff;
  o[21] = x7 >>>  8 & 0xff;
  o[22] = x7 >>> 16 & 0xff;
  o[23] = x7 >>> 24 & 0xff;

  o[24] = x8 >>>  0 & 0xff;
  o[25] = x8 >>>  8 & 0xff;
  o[26] = x8 >>> 16 & 0xff;
  o[27] = x8 >>> 24 & 0xff;

  o[28] = x9 >>>  0 & 0xff;
  o[29] = x9 >>>  8 & 0xff;
  o[30] = x9 >>> 16 & 0xff;
  o[31] = x9 >>> 24 & 0xff;
}

function crypto_core_salsa20(out,inp,k,c) {
  core_salsa20(out,inp,k,c);
}

function crypto_core_hsalsa20(out,inp,k,c) {
  core_hsalsa20(out,inp,k,c);
}

var sigma = new Uint8Array([101, 120, 112, 97, 110, 100, 32, 51, 50, 45, 98, 121, 116, 101, 32, 107]);
            // "expand 32-byte k"

function crypto_stream_salsa20_xor(c,cpos,m,mpos,b,n,k) {
  var z = new Uint8Array(16), x = new Uint8Array(64);
  var u, i;
  for (i = 0; i < 16; i++) z[i] = 0;
  for (i = 0; i < 8; i++) z[i] = n[i];
  while (b >= 64) {
    crypto_core_salsa20(x,z,k,sigma);
    for (i = 0; i < 64; i++) c[cpos+i] = m[mpos+i] ^ x[i];
    u = 1;
    for (i = 8; i < 16; i++) {
      u = u + (z[i] & 0xff) | 0;
      z[i] = u & 0xff;
      u >>>= 8;
    }
    b -= 64;
    cpos += 64;
    mpos += 64;
  }
  if (b > 0) {
    crypto_core_salsa20(x,z,k,sigma);
    for (i = 0; i < b; i++) c[cpos+i] = m[mpos+i] ^ x[i];
  }
  return 0;
}

function crypto_stream_salsa20(c,cpos,b,n,k) {
  var z = new Uint8Array(16), x = new Uint8Array(64);
  var u, i;
  for (i = 0; i < 16; i++) z[i] = 0;
  for (i = 0; i < 8; i++) z[i] = n[i];
  while (b >= 64) {
    crypto_core_salsa20(x,z,k,sigma);
    for (i = 0; i < 64; i++) c[cpos+i] = x[i];
    u = 1;
    for (i = 8; i < 16; i++) {
      u = u + (z[i] & 0xff) | 0;
      z[i] = u & 0xff;
      u >>>= 8;
    }
    b -= 64;
    cpos += 64;
  }
  if (b > 0) {
    crypto_core_salsa20(x,z,k,sigma);
    for (i = 0; i < b; i++) c[cpos+i] = x[i];
  }
  return 0;
}

function crypto_stream(c,cpos,d,n,k) {
  var s = new Uint8Array(32);
  crypto_core_hsalsa20(s,n,k,sigma);
  var sn = new Uint8Array(8);
  for (var i = 0; i < 8; i++) sn[i] = n[i+16];
  return crypto_stream_salsa20(c,cpos,d,sn,s);
}

function crypto_stream_xor(c,cpos,m,mpos,d,n,k) {
  var s = new Uint8Array(32);
  crypto_core_hsalsa20(s,n,k,sigma);
  var sn = new Uint8Array(8);
  for (var i = 0; i < 8; i++) sn[i] = n[i+16];
  return crypto_stream_salsa20_xor(c,cpos,m,mpos,d,sn,s);
}

/*
* Port of Andrew Moon's Poly1305-donna-16. Public domain.
* https://github.com/floodyberry/poly1305-donna
*/

var poly1305 = function(key) {
  this.buffer = new Uint8Array(16);
  this.r = new Uint16Array(10);
  this.h = new Uint16Array(10);
  this.pad = new Uint16Array(8);
  this.leftover = 0;
  this.fin = 0;

  var t0, t1, t2, t3, t4, t5, t6, t7;

  t0 = key[ 0] & 0xff | (key[ 1] & 0xff) << 8; this.r[0] = ( t0                     ) & 0x1fff;
  t1 = key[ 2] & 0xff | (key[ 3] & 0xff) << 8; this.r[1] = ((t0 >>> 13) | (t1 <<  3)) & 0x1fff;
  t2 = key[ 4] & 0xff | (key[ 5] & 0xff) << 8; this.r[2] = ((t1 >>> 10) | (t2 <<  6)) & 0x1f03;
  t3 = key[ 6] & 0xff | (key[ 7] & 0xff) << 8; this.r[3] = ((t2 >>>  7) | (t3 <<  9)) & 0x1fff;
  t4 = key[ 8] & 0xff | (key[ 9] & 0xff) << 8; this.r[4] = ((t3 >>>  4) | (t4 << 12)) & 0x00ff;
  this.r[5] = ((t4 >>>  1)) & 0x1ffe;
  t5 = key[10] & 0xff | (key[11] & 0xff) << 8; this.r[6] = ((t4 >>> 14) | (t5 <<  2)) & 0x1fff;
  t6 = key[12] & 0xff | (key[13] & 0xff) << 8; this.r[7] = ((t5 >>> 11) | (t6 <<  5)) & 0x1f81;
  t7 = key[14] & 0xff | (key[15] & 0xff) << 8; this.r[8] = ((t6 >>>  8) | (t7 <<  8)) & 0x1fff;
  this.r[9] = ((t7 >>>  5)) & 0x007f;

  this.pad[0] = key[16] & 0xff | (key[17] & 0xff) << 8;
  this.pad[1] = key[18] & 0xff | (key[19] & 0xff) << 8;
  this.pad[2] = key[20] & 0xff | (key[21] & 0xff) << 8;
  this.pad[3] = key[22] & 0xff | (key[23] & 0xff) << 8;
  this.pad[4] = key[24] & 0xff | (key[25] & 0xff) << 8;
  this.pad[5] = key[26] & 0xff | (key[27] & 0xff) << 8;
  this.pad[6] = key[28] & 0xff | (key[29] & 0xff) << 8;
  this.pad[7] = key[30] & 0xff | (key[31] & 0xff) << 8;
};

poly1305.prototype.blocks = function(m, mpos, bytes) {
  var hibit = this.fin ? 0 : (1 << 11);
  var t0, t1, t2, t3, t4, t5, t6, t7, c;
  var d0, d1, d2, d3, d4, d5, d6, d7, d8, d9;

  var h0 = this.h[0],
      h1 = this.h[1],
      h2 = this.h[2],
      h3 = this.h[3],
      h4 = this.h[4],
      h5 = this.h[5],
      h6 = this.h[6],
      h7 = this.h[7],
      h8 = this.h[8],
      h9 = this.h[9];

  var r0 = this.r[0],
      r1 = this.r[1],
      r2 = this.r[2],
      r3 = this.r[3],
      r4 = this.r[4],
      r5 = this.r[5],
      r6 = this.r[6],
      r7 = this.r[7],
      r8 = this.r[8],
      r9 = this.r[9];

  while (bytes >= 16) {
    t0 = m[mpos+ 0] & 0xff | (m[mpos+ 1] & 0xff) << 8; h0 += ( t0                     ) & 0x1fff;
    t1 = m[mpos+ 2] & 0xff | (m[mpos+ 3] & 0xff) << 8; h1 += ((t0 >>> 13) | (t1 <<  3)) & 0x1fff;
    t2 = m[mpos+ 4] & 0xff | (m[mpos+ 5] & 0xff) << 8; h2 += ((t1 >>> 10) | (t2 <<  6)) & 0x1fff;
    t3 = m[mpos+ 6] & 0xff | (m[mpos+ 7] & 0xff) << 8; h3 += ((t2 >>>  7) | (t3 <<  9)) & 0x1fff;
    t4 = m[mpos+ 8] & 0xff | (m[mpos+ 9] & 0xff) << 8; h4 += ((t3 >>>  4) | (t4 << 12)) & 0x1fff;
    h5 += ((t4 >>>  1)) & 0x1fff;
    t5 = m[mpos+10] & 0xff | (m[mpos+11] & 0xff) << 8; h6 += ((t4 >>> 14) | (t5 <<  2)) & 0x1fff;
    t6 = m[mpos+12] & 0xff | (m[mpos+13] & 0xff) << 8; h7 += ((t5 >>> 11) | (t6 <<  5)) & 0x1fff;
    t7 = m[mpos+14] & 0xff | (m[mpos+15] & 0xff) << 8; h8 += ((t6 >>>  8) | (t7 <<  8)) & 0x1fff;
    h9 += ((t7 >>> 5)) | hibit;

    c = 0;

    d0 = c;
    d0 += h0 * r0;
    d0 += h1 * (5 * r9);
    d0 += h2 * (5 * r8);
    d0 += h3 * (5 * r7);
    d0 += h4 * (5 * r6);
    c = (d0 >>> 13); d0 &= 0x1fff;
    d0 += h5 * (5 * r5);
    d0 += h6 * (5 * r4);
    d0 += h7 * (5 * r3);
    d0 += h8 * (5 * r2);
    d0 += h9 * (5 * r1);
    c += (d0 >>> 13); d0 &= 0x1fff;

    d1 = c;
    d1 += h0 * r1;
    d1 += h1 * r0;
    d1 += h2 * (5 * r9);
    d1 += h3 * (5 * r8);
    d1 += h4 * (5 * r7);
    c = (d1 >>> 13); d1 &= 0x1fff;
    d1 += h5 * (5 * r6);
    d1 += h6 * (5 * r5);
    d1 += h7 * (5 * r4);
    d1 += h8 * (5 * r3);
    d1 += h9 * (5 * r2);
    c += (d1 >>> 13); d1 &= 0x1fff;

    d2 = c;
    d2 += h0 * r2;
    d2 += h1 * r1;
    d2 += h2 * r0;
    d2 += h3 * (5 * r9);
    d2 += h4 * (5 * r8);
    c = (d2 >>> 13); d2 &= 0x1fff;
    d2 += h5 * (5 * r7);
    d2 += h6 * (5 * r6);
    d2 += h7 * (5 * r5);
    d2 += h8 * (5 * r4);
    d2 += h9 * (5 * r3);
    c += (d2 >>> 13); d2 &= 0x1fff;

    d3 = c;
    d3 += h0 * r3;
    d3 += h1 * r2;
    d3 += h2 * r1;
    d3 += h3 * r0;
    d3 += h4 * (5 * r9);
    c = (d3 >>> 13); d3 &= 0x1fff;
    d3 += h5 * (5 * r8);
    d3 += h6 * (5 * r7);
    d3 += h7 * (5 * r6);
    d3 += h8 * (5 * r5);
    d3 += h9 * (5 * r4);
    c += (d3 >>> 13); d3 &= 0x1fff;

    d4 = c;
    d4 += h0 * r4;
    d4 += h1 * r3;
    d4 += h2 * r2;
    d4 += h3 * r1;
    d4 += h4 * r0;
    c = (d4 >>> 13); d4 &= 0x1fff;
    d4 += h5 * (5 * r9);
    d4 += h6 * (5 * r8);
    d4 += h7 * (5 * r7);
    d4 += h8 * (5 * r6);
    d4 += h9 * (5 * r5);
    c += (d4 >>> 13); d4 &= 0x1fff;

    d5 = c;
    d5 += h0 * r5;
    d5 += h1 * r4;
    d5 += h2 * r3;
    d5 += h3 * r2;
    d5 += h4 * r1;
    c = (d5 >>> 13); d5 &= 0x1fff;
    d5 += h5 * r0;
    d5 += h6 * (5 * r9);
    d5 += h7 * (5 * r8);
    d5 += h8 * (5 * r7);
    d5 += h9 * (5 * r6);
    c += (d5 >>> 13); d5 &= 0x1fff;

    d6 = c;
    d6 += h0 * r6;
    d6 += h1 * r5;
    d6 += h2 * r4;
    d6 += h3 * r3;
    d6 += h4 * r2;
    c = (d6 >>> 13); d6 &= 0x1fff;
    d6 += h5 * r1;
    d6 += h6 * r0;
    d6 += h7 * (5 * r9);
    d6 += h8 * (5 * r8);
    d6 += h9 * (5 * r7);
    c += (d6 >>> 13); d6 &= 0x1fff;

    d7 = c;
    d7 += h0 * r7;
    d7 += h1 * r6;
    d7 += h2 * r5;
    d7 += h3 * r4;
    d7 += h4 * r3;
    c = (d7 >>> 13); d7 &= 0x1fff;
    d7 += h5 * r2;
    d7 += h6 * r1;
    d7 += h7 * r0;
    d7 += h8 * (5 * r9);
    d7 += h9 * (5 * r8);
    c += (d7 >>> 13); d7 &= 0x1fff;

    d8 = c;
    d8 += h0 * r8;
    d8 += h1 * r7;
    d8 += h2 * r6;
    d8 += h3 * r5;
    d8 += h4 * r4;
    c = (d8 >>> 13); d8 &= 0x1fff;
    d8 += h5 * r3;
    d8 += h6 * r2;
    d8 += h7 * r1;
    d8 += h8 * r0;
    d8 += h9 * (5 * r9);
    c += (d8 >>> 13); d8 &= 0x1fff;

    d9 = c;
    d9 += h0 * r9;
    d9 += h1 * r8;
    d9 += h2 * r7;
    d9 += h3 * r6;
    d9 += h4 * r5;
    c = (d9 >>> 13); d9 &= 0x1fff;
    d9 += h5 * r4;
    d9 += h6 * r3;
    d9 += h7 * r2;
    d9 += h8 * r1;
    d9 += h9 * r0;
    c += (d9 >>> 13); d9 &= 0x1fff;

    c = (((c << 2) + c)) | 0;
    c = (c + d0) | 0;
    d0 = c & 0x1fff;
    c = (c >>> 13);
    d1 += c;

    h0 = d0;
    h1 = d1;
    h2 = d2;
    h3 = d3;
    h4 = d4;
    h5 = d5;
    h6 = d6;
    h7 = d7;
    h8 = d8;
    h9 = d9;

    mpos += 16;
    bytes -= 16;
  }
  this.h[0] = h0;
  this.h[1] = h1;
  this.h[2] = h2;
  this.h[3] = h3;
  this.h[4] = h4;
  this.h[5] = h5;
  this.h[6] = h6;
  this.h[7] = h7;
  this.h[8] = h8;
  this.h[9] = h9;
};

poly1305.prototype.finish = function(mac, macpos) {
  var g = new Uint16Array(10);
  var c, mask, f, i;

  if (this.leftover) {
    i = this.leftover;
    this.buffer[i++] = 1;
    for (; i < 16; i++) this.buffer[i] = 0;
    this.fin = 1;
    this.blocks(this.buffer, 0, 16);
  }

  c = this.h[1] >>> 13;
  this.h[1] &= 0x1fff;
  for (i = 2; i < 10; i++) {
    this.h[i] += c;
    c = this.h[i] >>> 13;
    this.h[i] &= 0x1fff;
  }
  this.h[0] += (c * 5);
  c = this.h[0] >>> 13;
  this.h[0] &= 0x1fff;
  this.h[1] += c;
  c = this.h[1] >>> 13;
  this.h[1] &= 0x1fff;
  this.h[2] += c;

  g[0] = this.h[0] + 5;
  c = g[0] >>> 13;
  g[0] &= 0x1fff;
  for (i = 1; i < 10; i++) {
    g[i] = this.h[i] + c;
    c = g[i] >>> 13;
    g[i] &= 0x1fff;
  }
  g[9] -= (1 << 13);

  mask = (c ^ 1) - 1;
  for (i = 0; i < 10; i++) g[i] &= mask;
  mask = ~mask;
  for (i = 0; i < 10; i++) this.h[i] = (this.h[i] & mask) | g[i];

  this.h[0] = ((this.h[0]       ) | (this.h[1] << 13)                    ) & 0xffff;
  this.h[1] = ((this.h[1] >>>  3) | (this.h[2] << 10)                    ) & 0xffff;
  this.h[2] = ((this.h[2] >>>  6) | (this.h[3] <<  7)                    ) & 0xffff;
  this.h[3] = ((this.h[3] >>>  9) | (this.h[4] <<  4)                    ) & 0xffff;
  this.h[4] = ((this.h[4] >>> 12) | (this.h[5] <<  1) | (this.h[6] << 14)) & 0xffff;
  this.h[5] = ((this.h[6] >>>  2) | (this.h[7] << 11)                    ) & 0xffff;
  this.h[6] = ((this.h[7] >>>  5) | (this.h[8] <<  8)                    ) & 0xffff;
  this.h[7] = ((this.h[8] >>>  8) | (this.h[9] <<  5)                    ) & 0xffff;

  f = this.h[0] + this.pad[0];
  this.h[0] = f & 0xffff;
  for (i = 1; i < 8; i++) {
    f = (((this.h[i] + this.pad[i]) | 0) + (f >>> 16)) | 0;
    this.h[i] = f & 0xffff;
  }

  mac[macpos+ 0] = (this.h[0] >>> 0) & 0xff;
  mac[macpos+ 1] = (this.h[0] >>> 8) & 0xff;
  mac[macpos+ 2] = (this.h[1] >>> 0) & 0xff;
  mac[macpos+ 3] = (this.h[1] >>> 8) & 0xff;
  mac[macpos+ 4] = (this.h[2] >>> 0) & 0xff;
  mac[macpos+ 5] = (this.h[2] >>> 8) & 0xff;
  mac[macpos+ 6] = (this.h[3] >>> 0) & 0xff;
  mac[macpos+ 7] = (this.h[3] >>> 8) & 0xff;
  mac[macpos+ 8] = (this.h[4] >>> 0) & 0xff;
  mac[macpos+ 9] = (this.h[4] >>> 8) & 0xff;
  mac[macpos+10] = (this.h[5] >>> 0) & 0xff;
  mac[macpos+11] = (this.h[5] >>> 8) & 0xff;
  mac[macpos+12] = (this.h[6] >>> 0) & 0xff;
  mac[macpos+13] = (this.h[6] >>> 8) & 0xff;
  mac[macpos+14] = (this.h[7] >>> 0) & 0xff;
  mac[macpos+15] = (this.h[7] >>> 8) & 0xff;
};

poly1305.prototype.update = function(m, mpos, bytes) {
  var i, want;

  if (this.leftover) {
    want = (16 - this.leftover);
    if (want > bytes)
      want = bytes;
    for (i = 0; i < want; i++)
      this.buffer[this.leftover + i] = m[mpos+i];
    bytes -= want;
    mpos += want;
    this.leftover += want;
    if (this.leftover < 16)
      return;
    this.blocks(this.buffer, 0, 16);
    this.leftover = 0;
  }

  if (bytes >= 16) {
    want = bytes - (bytes % 16);
    this.blocks(m, mpos, want);
    mpos += want;
    bytes -= want;
  }

  if (bytes) {
    for (i = 0; i < bytes; i++)
      this.buffer[this.leftover + i] = m[mpos+i];
    this.leftover += bytes;
  }
};

function crypto_onetimeauth(out, outpos, m, mpos, n, k) {
  var s = new poly1305(k);
  s.update(m, mpos, n);
  s.finish(out, outpos);
  return 0;
}

function crypto_onetimeauth_verify(h, hpos, m, mpos, n, k) {
  var x = new Uint8Array(16);
  crypto_onetimeauth(x,0,m,mpos,n,k);
  return crypto_verify_16(h,hpos,x,0);
}

function crypto_secretbox(c,m,d,n,k) {
  var i;
  if (d < 32) return -1;
  crypto_stream_xor(c,0,m,0,d,n,k);
  crypto_onetimeauth(c, 16, c, 32, d - 32, c);
  for (i = 0; i < 16; i++) c[i] = 0;
  return 0;
}

function crypto_secretbox_open(m,c,d,n,k) {
  var i;
  var x = new Uint8Array(32);
  if (d < 32) return -1;
  crypto_stream(x,0,32,n,k);
  if (crypto_onetimeauth_verify(c, 16,c, 32,d - 32,x) !== 0) return -1;
  crypto_stream_xor(m,0,c,0,d,n,k);
  for (i = 0; i < 32; i++) m[i] = 0;
  return 0;
}

function set25519(r, a) {
  var i;
  for (i = 0; i < 16; i++) r[i] = a[i]|0;
}

function car25519(o) {
  var i, v, c = 1;
  for (i = 0; i < 16; i++) {
    v = o[i] + c + 65535;
    c = Math.floor(v / 65536);
    o[i] = v - c * 65536;
  }
  o[0] += c-1 + 37 * (c-1);
}

function sel25519(p, q, b) {
  var t, c = ~(b-1);
  for (var i = 0; i < 16; i++) {
    t = c & (p[i] ^ q[i]);
    p[i] ^= t;
    q[i] ^= t;
  }
}

function pack25519(o, n) {
  var i, j, b;
  var m = gf(), t = gf();
  for (i = 0; i < 16; i++) t[i] = n[i];
  car25519(t);
  car25519(t);
  car25519(t);
  for (j = 0; j < 2; j++) {
    m[0] = t[0] - 0xffed;
    for (i = 1; i < 15; i++) {
      m[i] = t[i] - 0xffff - ((m[i-1]>>16) & 1);
      m[i-1] &= 0xffff;
    }
    m[15] = t[15] - 0x7fff - ((m[14]>>16) & 1);
    b = (m[15]>>16) & 1;
    m[14] &= 0xffff;
    sel25519(t, m, 1-b);
  }
  for (i = 0; i < 16; i++) {
    o[2*i] = t[i] & 0xff;
    o[2*i+1] = t[i]>>8;
  }
}

function neq25519(a, b) {
  var c = new Uint8Array(32), d = new Uint8Array(32);
  pack25519(c, a);
  pack25519(d, b);
  return crypto_verify_32(c, 0, d, 0);
}

function par25519(a) {
  var d = new Uint8Array(32);
  pack25519(d, a);
  return d[0] & 1;
}

function unpack25519(o, n) {
  var i;
  for (i = 0; i < 16; i++) o[i] = n[2*i] + (n[2*i+1] << 8);
  o[15] &= 0x7fff;
}

function A(o, a, b) {
  for (var i = 0; i < 16; i++) o[i] = a[i] + b[i];
}

function Z(o, a, b) {
  for (var i = 0; i < 16; i++) o[i] = a[i] - b[i];
}

function M(o, a, b) {
  var v, c,
     t0 = 0,  t1 = 0,  t2 = 0,  t3 = 0,  t4 = 0,  t5 = 0,  t6 = 0,  t7 = 0,
     t8 = 0,  t9 = 0, t10 = 0, t11 = 0, t12 = 0, t13 = 0, t14 = 0, t15 = 0,
    t16 = 0, t17 = 0, t18 = 0, t19 = 0, t20 = 0, t21 = 0, t22 = 0, t23 = 0,
    t24 = 0, t25 = 0, t26 = 0, t27 = 0, t28 = 0, t29 = 0, t30 = 0,
    b0 = b[0],
    b1 = b[1],
    b2 = b[2],
    b3 = b[3],
    b4 = b[4],
    b5 = b[5],
    b6 = b[6],
    b7 = b[7],
    b8 = b[8],
    b9 = b[9],
    b10 = b[10],
    b11 = b[11],
    b12 = b[12],
    b13 = b[13],
    b14 = b[14],
    b15 = b[15];

  v = a[0];
  t0 += v * b0;
  t1 += v * b1;
  t2 += v * b2;
  t3 += v * b3;
  t4 += v * b4;
  t5 += v * b5;
  t6 += v * b6;
  t7 += v * b7;
  t8 += v * b8;
  t9 += v * b9;
  t10 += v * b10;
  t11 += v * b11;
  t12 += v * b12;
  t13 += v * b13;
  t14 += v * b14;
  t15 += v * b15;
  v = a[1];
  t1 += v * b0;
  t2 += v * b1;
  t3 += v * b2;
  t4 += v * b3;
  t5 += v * b4;
  t6 += v * b5;
  t7 += v * b6;
  t8 += v * b7;
  t9 += v * b8;
  t10 += v * b9;
  t11 += v * b10;
  t12 += v * b11;
  t13 += v * b12;
  t14 += v * b13;
  t15 += v * b14;
  t16 += v * b15;
  v = a[2];
  t2 += v * b0;
  t3 += v * b1;
  t4 += v * b2;
  t5 += v * b3;
  t6 += v * b4;
  t7 += v * b5;
  t8 += v * b6;
  t9 += v * b7;
  t10 += v * b8;
  t11 += v * b9;
  t12 += v * b10;
  t13 += v * b11;
  t14 += v * b12;
  t15 += v * b13;
  t16 += v * b14;
  t17 += v * b15;
  v = a[3];
  t3 += v * b0;
  t4 += v * b1;
  t5 += v * b2;
  t6 += v * b3;
  t7 += v * b4;
  t8 += v * b5;
  t9 += v * b6;
  t10 += v * b7;
  t11 += v * b8;
  t12 += v * b9;
  t13 += v * b10;
  t14 += v * b11;
  t15 += v * b12;
  t16 += v * b13;
  t17 += v * b14;
  t18 += v * b15;
  v = a[4];
  t4 += v * b0;
  t5 += v * b1;
  t6 += v * b2;
  t7 += v * b3;
  t8 += v * b4;
  t9 += v * b5;
  t10 += v * b6;
  t11 += v * b7;
  t12 += v * b8;
  t13 += v * b9;
  t14 += v * b10;
  t15 += v * b11;
  t16 += v * b12;
  t17 += v * b13;
  t18 += v * b14;
  t19 += v * b15;
  v = a[5];
  t5 += v * b0;
  t6 += v * b1;
  t7 += v * b2;
  t8 += v * b3;
  t9 += v * b4;
  t10 += v * b5;
  t11 += v * b6;
  t12 += v * b7;
  t13 += v * b8;
  t14 += v * b9;
  t15 += v * b10;
  t16 += v * b11;
  t17 += v * b12;
  t18 += v * b13;
  t19 += v * b14;
  t20 += v * b15;
  v = a[6];
  t6 += v * b0;
  t7 += v * b1;
  t8 += v * b2;
  t9 += v * b3;
  t10 += v * b4;
  t11 += v * b5;
  t12 += v * b6;
  t13 += v * b7;
  t14 += v * b8;
  t15 += v * b9;
  t16 += v * b10;
  t17 += v * b11;
  t18 += v * b12;
  t19 += v * b13;
  t20 += v * b14;
  t21 += v * b15;
  v = a[7];
  t7 += v * b0;
  t8 += v * b1;
  t9 += v * b2;
  t10 += v * b3;
  t11 += v * b4;
  t12 += v * b5;
  t13 += v * b6;
  t14 += v * b7;
  t15 += v * b8;
  t16 += v * b9;
  t17 += v * b10;
  t18 += v * b11;
  t19 += v * b12;
  t20 += v * b13;
  t21 += v * b14;
  t22 += v * b15;
  v = a[8];
  t8 += v * b0;
  t9 += v * b1;
  t10 += v * b2;
  t11 += v * b3;
  t12 += v * b4;
  t13 += v * b5;
  t14 += v * b6;
  t15 += v * b7;
  t16 += v * b8;
  t17 += v * b9;
  t18 += v * b10;
  t19 += v * b11;
  t20 += v * b12;
  t21 += v * b13;
  t22 += v * b14;
  t23 += v * b15;
  v = a[9];
  t9 += v * b0;
  t10 += v * b1;
  t11 += v * b2;
  t12 += v * b3;
  t13 += v * b4;
  t14 += v * b5;
  t15 += v * b6;
  t16 += v * b7;
  t17 += v * b8;
  t18 += v * b9;
  t19 += v * b10;
  t20 += v * b11;
  t21 += v * b12;
  t22 += v * b13;
  t23 += v * b14;
  t24 += v * b15;
  v = a[10];
  t10 += v * b0;
  t11 += v * b1;
  t12 += v * b2;
  t13 += v * b3;
  t14 += v * b4;
  t15 += v * b5;
  t16 += v * b6;
  t17 += v * b7;
  t18 += v * b8;
  t19 += v * b9;
  t20 += v * b10;
  t21 += v * b11;
  t22 += v * b12;
  t23 += v * b13;
  t24 += v * b14;
  t25 += v * b15;
  v = a[11];
  t11 += v * b0;
  t12 += v * b1;
  t13 += v * b2;
  t14 += v * b3;
  t15 += v * b4;
  t16 += v * b5;
  t17 += v * b6;
  t18 += v * b7;
  t19 += v * b8;
  t20 += v * b9;
  t21 += v * b10;
  t22 += v * b11;
  t23 += v * b12;
  t24 += v * b13;
  t25 += v * b14;
  t26 += v * b15;
  v = a[12];
  t12 += v * b0;
  t13 += v * b1;
  t14 += v * b2;
  t15 += v * b3;
  t16 += v * b4;
  t17 += v * b5;
  t18 += v * b6;
  t19 += v * b7;
  t20 += v * b8;
  t21 += v * b9;
  t22 += v * b10;
  t23 += v * b11;
  t24 += v * b12;
  t25 += v * b13;
  t26 += v * b14;
  t27 += v * b15;
  v = a[13];
  t13 += v * b0;
  t14 += v * b1;
  t15 += v * b2;
  t16 += v * b3;
  t17 += v * b4;
  t18 += v * b5;
  t19 += v * b6;
  t20 += v * b7;
  t21 += v * b8;
  t22 += v * b9;
  t23 += v * b10;
  t24 += v * b11;
  t25 += v * b12;
  t26 += v * b13;
  t27 += v * b14;
  t28 += v * b15;
  v = a[14];
  t14 += v * b0;
  t15 += v * b1;
  t16 += v * b2;
  t17 += v * b3;
  t18 += v * b4;
  t19 += v * b5;
  t20 += v * b6;
  t21 += v * b7;
  t22 += v * b8;
  t23 += v * b9;
  t24 += v * b10;
  t25 += v * b11;
  t26 += v * b12;
  t27 += v * b13;
  t28 += v * b14;
  t29 += v * b15;
  v = a[15];
  t15 += v * b0;
  t16 += v * b1;
  t17 += v * b2;
  t18 += v * b3;
  t19 += v * b4;
  t20 += v * b5;
  t21 += v * b6;
  t22 += v * b7;
  t23 += v * b8;
  t24 += v * b9;
  t25 += v * b10;
  t26 += v * b11;
  t27 += v * b12;
  t28 += v * b13;
  t29 += v * b14;
  t30 += v * b15;

  t0  += 38 * t16;
  t1  += 38 * t17;
  t2  += 38 * t18;
  t3  += 38 * t19;
  t4  += 38 * t20;
  t5  += 38 * t21;
  t6  += 38 * t22;
  t7  += 38 * t23;
  t8  += 38 * t24;
  t9  += 38 * t25;
  t10 += 38 * t26;
  t11 += 38 * t27;
  t12 += 38 * t28;
  t13 += 38 * t29;
  t14 += 38 * t30;
  // t15 left as is

  // first car
  c = 1;
  v =  t0 + c + 65535; c = Math.floor(v / 65536);  t0 = v - c * 65536;
  v =  t1 + c + 65535; c = Math.floor(v / 65536);  t1 = v - c * 65536;
  v =  t2 + c + 65535; c = Math.floor(v / 65536);  t2 = v - c * 65536;
  v =  t3 + c + 65535; c = Math.floor(v / 65536);  t3 = v - c * 65536;
  v =  t4 + c + 65535; c = Math.floor(v / 65536);  t4 = v - c * 65536;
  v =  t5 + c + 65535; c = Math.floor(v / 65536);  t5 = v - c * 65536;
  v =  t6 + c + 65535; c = Math.floor(v / 65536);  t6 = v - c * 65536;
  v =  t7 + c + 65535; c = Math.floor(v / 65536);  t7 = v - c * 65536;
  v =  t8 + c + 65535; c = Math.floor(v / 65536);  t8 = v - c * 65536;
  v =  t9 + c + 65535; c = Math.floor(v / 65536);  t9 = v - c * 65536;
  v = t10 + c + 65535; c = Math.floor(v / 65536); t10 = v - c * 65536;
  v = t11 + c + 65535; c = Math.floor(v / 65536); t11 = v - c * 65536;
  v = t12 + c + 65535; c = Math.floor(v / 65536); t12 = v - c * 65536;
  v = t13 + c + 65535; c = Math.floor(v / 65536); t13 = v - c * 65536;
  v = t14 + c + 65535; c = Math.floor(v / 65536); t14 = v - c * 65536;
  v = t15 + c + 65535; c = Math.floor(v / 65536); t15 = v - c * 65536;
  t0 += c-1 + 37 * (c-1);

  // second car
  c = 1;
  v =  t0 + c + 65535; c = Math.floor(v / 65536);  t0 = v - c * 65536;
  v =  t1 + c + 65535; c = Math.floor(v / 65536);  t1 = v - c * 65536;
  v =  t2 + c + 65535; c = Math.floor(v / 65536);  t2 = v - c * 65536;
  v =  t3 + c + 65535; c = Math.floor(v / 65536);  t3 = v - c * 65536;
  v =  t4 + c + 65535; c = Math.floor(v / 65536);  t4 = v - c * 65536;
  v =  t5 + c + 65535; c = Math.floor(v / 65536);  t5 = v - c * 65536;
  v =  t6 + c + 65535; c = Math.floor(v / 65536);  t6 = v - c * 65536;
  v =  t7 + c + 65535; c = Math.floor(v / 65536);  t7 = v - c * 65536;
  v =  t8 + c + 65535; c = Math.floor(v / 65536);  t8 = v - c * 65536;
  v =  t9 + c + 65535; c = Math.floor(v / 65536);  t9 = v - c * 65536;
  v = t10 + c + 65535; c = Math.floor(v / 65536); t10 = v - c * 65536;
  v = t11 + c + 65535; c = Math.floor(v / 65536); t11 = v - c * 65536;
  v = t12 + c + 65535; c = Math.floor(v / 65536); t12 = v - c * 65536;
  v = t13 + c + 65535; c = Math.floor(v / 65536); t13 = v - c * 65536;
  v = t14 + c + 65535; c = Math.floor(v / 65536); t14 = v - c * 65536;
  v = t15 + c + 65535; c = Math.floor(v / 65536); t15 = v - c * 65536;
  t0 += c-1 + 37 * (c-1);

  o[ 0] = t0;
  o[ 1] = t1;
  o[ 2] = t2;
  o[ 3] = t3;
  o[ 4] = t4;
  o[ 5] = t5;
  o[ 6] = t6;
  o[ 7] = t7;
  o[ 8] = t8;
  o[ 9] = t9;
  o[10] = t10;
  o[11] = t11;
  o[12] = t12;
  o[13] = t13;
  o[14] = t14;
  o[15] = t15;
}

function S(o, a) {
  M(o, a, a);
}

function inv25519(o, i) {
  var c = gf();
  var a;
  for (a = 0; a < 16; a++) c[a] = i[a];
  for (a = 253; a >= 0; a--) {
    S(c, c);
    if(a !== 2 && a !== 4) M(c, c, i);
  }
  for (a = 0; a < 16; a++) o[a] = c[a];
}

function pow2523(o, i) {
  var c = gf();
  var a;
  for (a = 0; a < 16; a++) c[a] = i[a];
  for (a = 250; a >= 0; a--) {
      S(c, c);
      if(a !== 1) M(c, c, i);
  }
  for (a = 0; a < 16; a++) o[a] = c[a];
}

function crypto_scalarmult(q, n, p) {
  var z = new Uint8Array(32);
  var x = new Float64Array(80), r, i;
  var a = gf(), b = gf(), c = gf(),
      d = gf(), e = gf(), f = gf();
  for (i = 0; i < 31; i++) z[i] = n[i];
  z[31]=(n[31]&127)|64;
  z[0]&=248;
  unpack25519(x,p);
  for (i = 0; i < 16; i++) {
    b[i]=x[i];
    d[i]=a[i]=c[i]=0;
  }
  a[0]=d[0]=1;
  for (i=254; i>=0; --i) {
    r=(z[i>>>3]>>>(i&7))&1;
    sel25519(a,b,r);
    sel25519(c,d,r);
    A(e,a,c);
    Z(a,a,c);
    A(c,b,d);
    Z(b,b,d);
    S(d,e);
    S(f,a);
    M(a,c,a);
    M(c,b,e);
    A(e,a,c);
    Z(a,a,c);
    S(b,a);
    Z(c,d,f);
    M(a,c,_121665);
    A(a,a,d);
    M(c,c,a);
    M(a,d,f);
    M(d,b,x);
    S(b,e);
    sel25519(a,b,r);
    sel25519(c,d,r);
  }
  for (i = 0; i < 16; i++) {
    x[i+16]=a[i];
    x[i+32]=c[i];
    x[i+48]=b[i];
    x[i+64]=d[i];
  }
  var x32 = x.subarray(32);
  var x16 = x.subarray(16);
  inv25519(x32,x32);
  M(x16,x16,x32);
  pack25519(q,x16);
  return 0;
}

function crypto_scalarmult_base(q, n) {
  return crypto_scalarmult(q, n, _9);
}

function crypto_box_keypair(y, x) {
  randombytes(x, 32);
  return crypto_scalarmult_base(y, x);
}

function crypto_box_beforenm(k, y, x) {
  var s = new Uint8Array(32);
  crypto_scalarmult(s, x, y);
  return crypto_core_hsalsa20(k, _0, s, sigma);
}

var crypto_box_afternm = crypto_secretbox;
var crypto_box_open_afternm = crypto_secretbox_open;

function crypto_box(c, m, d, n, y, x) {
  var k = new Uint8Array(32);
  crypto_box_beforenm(k, y, x);
  return crypto_box_afternm(c, m, d, n, k);
}

function crypto_box_open(m, c, d, n, y, x) {
  var k = new Uint8Array(32);
  crypto_box_beforenm(k, y, x);
  return crypto_box_open_afternm(m, c, d, n, k);
}

var K = [
  0x428a2f98, 0xd728ae22, 0x71374491, 0x23ef65cd,
  0xb5c0fbcf, 0xec4d3b2f, 0xe9b5dba5, 0x8189dbbc,
  0x3956c25b, 0xf348b538, 0x59f111f1, 0xb605d019,
  0x923f82a4, 0xaf194f9b, 0xab1c5ed5, 0xda6d8118,
  0xd807aa98, 0xa3030242, 0x12835b01, 0x45706fbe,
  0x243185be, 0x4ee4b28c, 0x550c7dc3, 0xd5ffb4e2,
  0x72be5d74, 0xf27b896f, 0x80deb1fe, 0x3b1696b1,
  0x9bdc06a7, 0x25c71235, 0xc19bf174, 0xcf692694,
  0xe49b69c1, 0x9ef14ad2, 0xefbe4786, 0x384f25e3,
  0x0fc19dc6, 0x8b8cd5b5, 0x240ca1cc, 0x77ac9c65,
  0x2de92c6f, 0x592b0275, 0x4a7484aa, 0x6ea6e483,
  0x5cb0a9dc, 0xbd41fbd4, 0x76f988da, 0x831153b5,
  0x983e5152, 0xee66dfab, 0xa831c66d, 0x2db43210,
  0xb00327c8, 0x98fb213f, 0xbf597fc7, 0xbeef0ee4,
  0xc6e00bf3, 0x3da88fc2, 0xd5a79147, 0x930aa725,
  0x06ca6351, 0xe003826f, 0x14292967, 0x0a0e6e70,
  0x27b70a85, 0x46d22ffc, 0x2e1b2138, 0x5c26c926,
  0x4d2c6dfc, 0x5ac42aed, 0x53380d13, 0x9d95b3df,
  0x650a7354, 0x8baf63de, 0x766a0abb, 0x3c77b2a8,
  0x81c2c92e, 0x47edaee6, 0x92722c85, 0x1482353b,
  0xa2bfe8a1, 0x4cf10364, 0xa81a664b, 0xbc423001,
  0xc24b8b70, 0xd0f89791, 0xc76c51a3, 0x0654be30,
  0xd192e819, 0xd6ef5218, 0xd6990624, 0x5565a910,
  0xf40e3585, 0x5771202a, 0x106aa070, 0x32bbd1b8,
  0x19a4c116, 0xb8d2d0c8, 0x1e376c08, 0x5141ab53,
  0x2748774c, 0xdf8eeb99, 0x34b0bcb5, 0xe19b48a8,
  0x391c0cb3, 0xc5c95a63, 0x4ed8aa4a, 0xe3418acb,
  0x5b9cca4f, 0x7763e373, 0x682e6ff3, 0xd6b2b8a3,
  0x748f82ee, 0x5defb2fc, 0x78a5636f, 0x43172f60,
  0x84c87814, 0xa1f0ab72, 0x8cc70208, 0x1a6439ec,
  0x90befffa, 0x23631e28, 0xa4506ceb, 0xde82bde9,
  0xbef9a3f7, 0xb2c67915, 0xc67178f2, 0xe372532b,
  0xca273ece, 0xea26619c, 0xd186b8c7, 0x21c0c207,
  0xeada7dd6, 0xcde0eb1e, 0xf57d4f7f, 0xee6ed178,
  0x06f067aa, 0x72176fba, 0x0a637dc5, 0xa2c898a6,
  0x113f9804, 0xbef90dae, 0x1b710b35, 0x131c471b,
  0x28db77f5, 0x23047d84, 0x32caab7b, 0x40c72493,
  0x3c9ebe0a, 0x15c9bebc, 0x431d67c4, 0x9c100d4c,
  0x4cc5d4be, 0xcb3e42b6, 0x597f299c, 0xfc657e2a,
  0x5fcb6fab, 0x3ad6faec, 0x6c44198c, 0x4a475817
];

function crypto_hashblocks_hl(hh, hl, m, n) {
  var wh = new Int32Array(16), wl = new Int32Array(16),
      bh0, bh1, bh2, bh3, bh4, bh5, bh6, bh7,
      bl0, bl1, bl2, bl3, bl4, bl5, bl6, bl7,
      th, tl, i, j, h, l, a, b, c, d;

  var ah0 = hh[0],
      ah1 = hh[1],
      ah2 = hh[2],
      ah3 = hh[3],
      ah4 = hh[4],
      ah5 = hh[5],
      ah6 = hh[6],
      ah7 = hh[7],

      al0 = hl[0],
      al1 = hl[1],
      al2 = hl[2],
      al3 = hl[3],
      al4 = hl[4],
      al5 = hl[5],
      al6 = hl[6],
      al7 = hl[7];

  var pos = 0;
  while (n >= 128) {
    for (i = 0; i < 16; i++) {
      j = 8 * i + pos;
      wh[i] = (m[j+0] << 24) | (m[j+1] << 16) | (m[j+2] << 8) | m[j+3];
      wl[i] = (m[j+4] << 24) | (m[j+5] << 16) | (m[j+6] << 8) | m[j+7];
    }
    for (i = 0; i < 80; i++) {
      bh0 = ah0;
      bh1 = ah1;
      bh2 = ah2;
      bh3 = ah3;
      bh4 = ah4;
      bh5 = ah5;
      bh6 = ah6;
      bh7 = ah7;

      bl0 = al0;
      bl1 = al1;
      bl2 = al2;
      bl3 = al3;
      bl4 = al4;
      bl5 = al5;
      bl6 = al6;
      bl7 = al7;

      // add
      h = ah7;
      l = al7;

      a = l & 0xffff; b = l >>> 16;
      c = h & 0xffff; d = h >>> 16;

      // Sigma1
      h = ((ah4 >>> 14) | (al4 << (32-14))) ^ ((ah4 >>> 18) | (al4 << (32-18))) ^ ((al4 >>> (41-32)) | (ah4 << (32-(41-32))));
      l = ((al4 >>> 14) | (ah4 << (32-14))) ^ ((al4 >>> 18) | (ah4 << (32-18))) ^ ((ah4 >>> (41-32)) | (al4 << (32-(41-32))));

      a += l & 0xffff; b += l >>> 16;
      c += h & 0xffff; d += h >>> 16;

      // Ch
      h = (ah4 & ah5) ^ (~ah4 & ah6);
      l = (al4 & al5) ^ (~al4 & al6);

      a += l & 0xffff; b += l >>> 16;
      c += h & 0xffff; d += h >>> 16;

      // K
      h = K[i*2];
      l = K[i*2+1];

      a += l & 0xffff; b += l >>> 16;
      c += h & 0xffff; d += h >>> 16;

      // w
      h = wh[i%16];
      l = wl[i%16];

      a += l & 0xffff; b += l >>> 16;
      c += h & 0xffff; d += h >>> 16;

      b += a >>> 16;
      c += b >>> 16;
      d += c >>> 16;

      th = c & 0xffff | d << 16;
      tl = a & 0xffff | b << 16;

      // add
      h = th;
      l = tl;

      a = l & 0xffff; b = l >>> 16;
      c = h & 0xffff; d = h >>> 16;

      // Sigma0
      h = ((ah0 >>> 28) | (al0 << (32-28))) ^ ((al0 >>> (34-32)) | (ah0 << (32-(34-32)))) ^ ((al0 >>> (39-32)) | (ah0 << (32-(39-32))));
      l = ((al0 >>> 28) | (ah0 << (32-28))) ^ ((ah0 >>> (34-32)) | (al0 << (32-(34-32)))) ^ ((ah0 >>> (39-32)) | (al0 << (32-(39-32))));

      a += l & 0xffff; b += l >>> 16;
      c += h & 0xffff; d += h >>> 16;

      // Maj
      h = (ah0 & ah1) ^ (ah0 & ah2) ^ (ah1 & ah2);
      l = (al0 & al1) ^ (al0 & al2) ^ (al1 & al2);

      a += l & 0xffff; b += l >>> 16;
      c += h & 0xffff; d += h >>> 16;

      b += a >>> 16;
      c += b >>> 16;
      d += c >>> 16;

      bh7 = (c & 0xffff) | (d << 16);
      bl7 = (a & 0xffff) | (b << 16);

      // add
      h = bh3;
      l = bl3;

      a = l & 0xffff; b = l >>> 16;
      c = h & 0xffff; d = h >>> 16;

      h = th;
      l = tl;

      a += l & 0xffff; b += l >>> 16;
      c += h & 0xffff; d += h >>> 16;

      b += a >>> 16;
      c += b >>> 16;
      d += c >>> 16;

      bh3 = (c & 0xffff) | (d << 16);
      bl3 = (a & 0xffff) | (b << 16);

      ah1 = bh0;
      ah2 = bh1;
      ah3 = bh2;
      ah4 = bh3;
      ah5 = bh4;
      ah6 = bh5;
      ah7 = bh6;
      ah0 = bh7;

      al1 = bl0;
      al2 = bl1;
      al3 = bl2;
      al4 = bl3;
      al5 = bl4;
      al6 = bl5;
      al7 = bl6;
      al0 = bl7;

      if (i%16 === 15) {
        for (j = 0; j < 16; j++) {
          // add
          h = wh[j];
          l = wl[j];

          a = l & 0xffff; b = l >>> 16;
          c = h & 0xffff; d = h >>> 16;

          h = wh[(j+9)%16];
          l = wl[(j+9)%16];

          a += l & 0xffff; b += l >>> 16;
          c += h & 0xffff; d += h >>> 16;

          // sigma0
          th = wh[(j+1)%16];
          tl = wl[(j+1)%16];
          h = ((th >>> 1) | (tl << (32-1))) ^ ((th >>> 8) | (tl << (32-8))) ^ (th >>> 7);
          l = ((tl >>> 1) | (th << (32-1))) ^ ((tl >>> 8) | (th << (32-8))) ^ ((tl >>> 7) | (th << (32-7)));

          a += l & 0xffff; b += l >>> 16;
          c += h & 0xffff; d += h >>> 16;

          // sigma1
          th = wh[(j+14)%16];
          tl = wl[(j+14)%16];
          h = ((th >>> 19) | (tl << (32-19))) ^ ((tl >>> (61-32)) | (th << (32-(61-32)))) ^ (th >>> 6);
          l = ((tl >>> 19) | (th << (32-19))) ^ ((th >>> (61-32)) | (tl << (32-(61-32)))) ^ ((tl >>> 6) | (th << (32-6)));

          a += l & 0xffff; b += l >>> 16;
          c += h & 0xffff; d += h >>> 16;

          b += a >>> 16;
          c += b >>> 16;
          d += c >>> 16;

          wh[j] = (c & 0xffff) | (d << 16);
          wl[j] = (a & 0xffff) | (b << 16);
        }
      }
    }

    // add
    h = ah0;
    l = al0;

    a = l & 0xffff; b = l >>> 16;
    c = h & 0xffff; d = h >>> 16;

    h = hh[0];
    l = hl[0];

    a += l & 0xffff; b += l >>> 16;
    c += h & 0xffff; d += h >>> 16;

    b += a >>> 16;
    c += b >>> 16;
    d += c >>> 16;

    hh[0] = ah0 = (c & 0xffff) | (d << 16);
    hl[0] = al0 = (a & 0xffff) | (b << 16);

    h = ah1;
    l = al1;

    a = l & 0xffff; b = l >>> 16;
    c = h & 0xffff; d = h >>> 16;

    h = hh[1];
    l = hl[1];

    a += l & 0xffff; b += l >>> 16;
    c += h & 0xffff; d += h >>> 16;

    b += a >>> 16;
    c += b >>> 16;
    d += c >>> 16;

    hh[1] = ah1 = (c & 0xffff) | (d << 16);
    hl[1] = al1 = (a & 0xffff) | (b << 16);

    h = ah2;
    l = al2;

    a = l & 0xffff; b = l >>> 16;
    c = h & 0xffff; d = h >>> 16;

    h = hh[2];
    l = hl[2];

    a += l & 0xffff; b += l >>> 16;
    c += h & 0xffff; d += h >>> 16;

    b += a >>> 16;
    c += b >>> 16;
    d += c >>> 16;

    hh[2] = ah2 = (c & 0xffff) | (d << 16);
    hl[2] = al2 = (a & 0xffff) | (b << 16);

    h = ah3;
    l = al3;

    a = l & 0xffff; b = l >>> 16;
    c = h & 0xffff; d = h >>> 16;

    h = hh[3];
    l = hl[3];

    a += l & 0xffff; b += l >>> 16;
    c += h & 0xffff; d += h >>> 16;

    b += a >>> 16;
    c += b >>> 16;
    d += c >>> 16;

    hh[3] = ah3 = (c & 0xffff) | (d << 16);
    hl[3] = al3 = (a & 0xffff) | (b << 16);

    h = ah4;
    l = al4;

    a = l & 0xffff; b = l >>> 16;
    c = h & 0xffff; d = h >>> 16;

    h = hh[4];
    l = hl[4];

    a += l & 0xffff; b += l >>> 16;
    c += h & 0xffff; d += h >>> 16;

    b += a >>> 16;
    c += b >>> 16;
    d += c >>> 16;

    hh[4] = ah4 = (c & 0xffff) | (d << 16);
    hl[4] = al4 = (a & 0xffff) | (b << 16);

    h = ah5;
    l = al5;

    a = l & 0xffff; b = l >>> 16;
    c = h & 0xffff; d = h >>> 16;

    h = hh[5];
    l = hl[5];

    a += l & 0xffff; b += l >>> 16;
    c += h & 0xffff; d += h >>> 16;

    b += a >>> 16;
    c += b >>> 16;
    d += c >>> 16;

    hh[5] = ah5 = (c & 0xffff) | (d << 16);
    hl[5] = al5 = (a & 0xffff) | (b << 16);

    h = ah6;
    l = al6;

    a = l & 0xffff; b = l >>> 16;
    c = h & 0xffff; d = h >>> 16;

    h = hh[6];
    l = hl[6];

    a += l & 0xffff; b += l >>> 16;
    c += h & 0xffff; d += h >>> 16;

    b += a >>> 16;
    c += b >>> 16;
    d += c >>> 16;

    hh[6] = ah6 = (c & 0xffff) | (d << 16);
    hl[6] = al6 = (a & 0xffff) | (b << 16);

    h = ah7;
    l = al7;

    a = l & 0xffff; b = l >>> 16;
    c = h & 0xffff; d = h >>> 16;

    h = hh[7];
    l = hl[7];

    a += l & 0xffff; b += l >>> 16;
    c += h & 0xffff; d += h >>> 16;

    b += a >>> 16;
    c += b >>> 16;
    d += c >>> 16;

    hh[7] = ah7 = (c & 0xffff) | (d << 16);
    hl[7] = al7 = (a & 0xffff) | (b << 16);

    pos += 128;
    n -= 128;
  }

  return n;
}

function crypto_hash(out, m, n) {
  var hh = new Int32Array(8),
      hl = new Int32Array(8),
      x = new Uint8Array(256),
      i, b = n;

  hh[0] = 0x6a09e667;
  hh[1] = 0xbb67ae85;
  hh[2] = 0x3c6ef372;
  hh[3] = 0xa54ff53a;
  hh[4] = 0x510e527f;
  hh[5] = 0x9b05688c;
  hh[6] = 0x1f83d9ab;
  hh[7] = 0x5be0cd19;

  hl[0] = 0xf3bcc908;
  hl[1] = 0x84caa73b;
  hl[2] = 0xfe94f82b;
  hl[3] = 0x5f1d36f1;
  hl[4] = 0xade682d1;
  hl[5] = 0x2b3e6c1f;
  hl[6] = 0xfb41bd6b;
  hl[7] = 0x137e2179;

  crypto_hashblocks_hl(hh, hl, m, n);
  n %= 128;

  for (i = 0; i < n; i++) x[i] = m[b-n+i];
  x[n] = 128;

  n = 256-128*(n<112?1:0);
  x[n-9] = 0;
  ts64(x, n-8,  (b / 0x20000000) | 0, b << 3);
  crypto_hashblocks_hl(hh, hl, x, n);

  for (i = 0; i < 8; i++) ts64(out, 8*i, hh[i], hl[i]);

  return 0;
}

function add(p, q) {
  var a = gf(), b = gf(), c = gf(),
      d = gf(), e = gf(), f = gf(),
      g = gf(), h = gf(), t = gf();

  Z(a, p[1], p[0]);
  Z(t, q[1], q[0]);
  M(a, a, t);
  A(b, p[0], p[1]);
  A(t, q[0], q[1]);
  M(b, b, t);
  M(c, p[3], q[3]);
  M(c, c, D2);
  M(d, p[2], q[2]);
  A(d, d, d);
  Z(e, b, a);
  Z(f, d, c);
  A(g, d, c);
  A(h, b, a);

  M(p[0], e, f);
  M(p[1], h, g);
  M(p[2], g, f);
  M(p[3], e, h);
}

function cswap(p, q, b) {
  var i;
  for (i = 0; i < 4; i++) {
    sel25519(p[i], q[i], b);
  }
}

function pack(r, p) {
  var tx = gf(), ty = gf(), zi = gf();
  inv25519(zi, p[2]);
  M(tx, p[0], zi);
  M(ty, p[1], zi);
  pack25519(r, ty);
  r[31] ^= par25519(tx) << 7;
}

function scalarmult(p, q, s) {
  var b, i;
  set25519(p[0], gf0);
  set25519(p[1], gf1);
  set25519(p[2], gf1);
  set25519(p[3], gf0);
  for (i = 255; i >= 0; --i) {
    b = (s[(i/8)|0] >> (i&7)) & 1;
    cswap(p, q, b);
    add(q, p);
    add(p, p);
    cswap(p, q, b);
  }
}

function scalarbase(p, s) {
  var q = [gf(), gf(), gf(), gf()];
  set25519(q[0], X);
  set25519(q[1], Y);
  set25519(q[2], gf1);
  M(q[3], X, Y);
  scalarmult(p, q, s);
}

function crypto_sign_keypair(pk, sk, seeded) {
  var d = new Uint8Array(64);
  var p = [gf(), gf(), gf(), gf()];
  var i;

  if (!seeded) randombytes(sk, 32);
  crypto_hash(d, sk, 32);
  d[0] &= 248;
  d[31] &= 127;
  d[31] |= 64;

  scalarbase(p, d);
  pack(pk, p);

  for (i = 0; i < 32; i++) sk[i+32] = pk[i];
  return 0;
}

var L = new Float64Array([0xed, 0xd3, 0xf5, 0x5c, 0x1a, 0x63, 0x12, 0x58, 0xd6, 0x9c, 0xf7, 0xa2, 0xde, 0xf9, 0xde, 0x14, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x10]);

function modL(r, x) {
  var carry, i, j, k;
  for (i = 63; i >= 32; --i) {
    carry = 0;
    for (j = i - 32, k = i - 12; j < k; ++j) {
      x[j] += carry - 16 * x[i] * L[j - (i - 32)];
      carry = (x[j] + 128) >> 8;
      x[j] -= carry * 256;
    }
    x[j] += carry;
    x[i] = 0;
  }
  carry = 0;
  for (j = 0; j < 32; j++) {
    x[j] += carry - (x[31] >> 4) * L[j];
    carry = x[j] >> 8;
    x[j] &= 255;
  }
  for (j = 0; j < 32; j++) x[j] -= carry * L[j];
  for (i = 0; i < 32; i++) {
    x[i+1] += x[i] >> 8;
    r[i] = x[i] & 255;
  }
}

function reduce(r) {
  var x = new Float64Array(64), i;
  for (i = 0; i < 64; i++) x[i] = r[i];
  for (i = 0; i < 64; i++) r[i] = 0;
  modL(r, x);
}

// Note: difference from C - smlen returned, not passed as argument.
function crypto_sign(sm, m, n, sk) {
  var d = new Uint8Array(64), h = new Uint8Array(64), r = new Uint8Array(64);
  var i, j, x = new Float64Array(64);
  var p = [gf(), gf(), gf(), gf()];

  crypto_hash(d, sk, 32);
  d[0] &= 248;
  d[31] &= 127;
  d[31] |= 64;

  var smlen = n + 64;
  for (i = 0; i < n; i++) sm[64 + i] = m[i];
  for (i = 0; i < 32; i++) sm[32 + i] = d[32 + i];

  crypto_hash(r, sm.subarray(32), n+32);
  reduce(r);
  scalarbase(p, r);
  pack(sm, p);

  for (i = 32; i < 64; i++) sm[i] = sk[i];
  crypto_hash(h, sm, n + 64);
  reduce(h);

  for (i = 0; i < 64; i++) x[i] = 0;
  for (i = 0; i < 32; i++) x[i] = r[i];
  for (i = 0; i < 32; i++) {
    for (j = 0; j < 32; j++) {
      x[i+j] += h[i] * d[j];
    }
  }

  modL(sm.subarray(32), x);
  return smlen;
}

function unpackneg(r, p) {
  var t = gf(), chk = gf(), num = gf(),
      den = gf(), den2 = gf(), den4 = gf(),
      den6 = gf();

  set25519(r[2], gf1);
  unpack25519(r[1], p);
  S(num, r[1]);
  M(den, num, D);
  Z(num, num, r[2]);
  A(den, r[2], den);

  S(den2, den);
  S(den4, den2);
  M(den6, den4, den2);
  M(t, den6, num);
  M(t, t, den);

  pow2523(t, t);
  M(t, t, num);
  M(t, t, den);
  M(t, t, den);
  M(r[0], t, den);

  S(chk, r[0]);
  M(chk, chk, den);
  if (neq25519(chk, num)) M(r[0], r[0], I);

  S(chk, r[0]);
  M(chk, chk, den);
  if (neq25519(chk, num)) return -1;

  if (par25519(r[0]) === (p[31]>>7)) Z(r[0], gf0, r[0]);

  M(r[3], r[0], r[1]);
  return 0;
}

function crypto_sign_open(m, sm, n, pk) {
  var i, mlen;
  var t = new Uint8Array(32), h = new Uint8Array(64);
  var p = [gf(), gf(), gf(), gf()],
      q = [gf(), gf(), gf(), gf()];

  mlen = -1;
  if (n < 64) return -1;

  if (unpackneg(q, pk)) return -1;

  for (i = 0; i < n; i++) m[i] = sm[i];
  for (i = 0; i < 32; i++) m[i+32] = pk[i];
  crypto_hash(h, m, n);
  reduce(h);
  scalarmult(p, q, h);

  scalarbase(q, sm.subarray(32));
  add(p, q);
  pack(t, p);

  n -= 64;
  if (crypto_verify_32(sm, 0, t, 0)) {
    for (i = 0; i < n; i++) m[i] = 0;
    return -1;
  }

  for (i = 0; i < n; i++) m[i] = sm[i + 64];
  mlen = n;
  return mlen;
}

var crypto_secretbox_KEYBYTES = 32,
    crypto_secretbox_NONCEBYTES = 24,
    crypto_secretbox_ZEROBYTES = 32,
    crypto_secretbox_BOXZEROBYTES = 16,
    crypto_scalarmult_BYTES = 32,
    crypto_scalarmult_SCALARBYTES = 32,
    crypto_box_PUBLICKEYBYTES = 32,
    crypto_box_SECRETKEYBYTES = 32,
    crypto_box_BEFORENMBYTES = 32,
    crypto_box_NONCEBYTES = crypto_secretbox_NONCEBYTES,
    crypto_box_ZEROBYTES = crypto_secretbox_ZEROBYTES,
    crypto_box_BOXZEROBYTES = crypto_secretbox_BOXZEROBYTES,
    crypto_sign_BYTES = 64,
    crypto_sign_PUBLICKEYBYTES = 32,
    crypto_sign_SECRETKEYBYTES = 64,
    crypto_sign_SEEDBYTES = 32,
    crypto_hash_BYTES = 64;

nacl.lowlevel = {
  crypto_core_hsalsa20: crypto_core_hsalsa20,
  crypto_stream_xor: crypto_stream_xor,
  crypto_stream: crypto_stream,
  crypto_stream_salsa20_xor: crypto_stream_salsa20_xor,
  crypto_stream_salsa20: crypto_stream_salsa20,
  crypto_onetimeauth: crypto_onetimeauth,
  crypto_onetimeauth_verify: crypto_onetimeauth_verify,
  crypto_verify_16: crypto_verify_16,
  crypto_verify_32: crypto_verify_32,
  crypto_secretbox: crypto_secretbox,
  crypto_secretbox_open: crypto_secretbox_open,
  crypto_scalarmult: crypto_scalarmult,
  crypto_scalarmult_base: crypto_scalarmult_base,
  crypto_box_beforenm: crypto_box_beforenm,
  crypto_box_afternm: crypto_box_afternm,
  crypto_box: crypto_box,
  crypto_box_open: crypto_box_open,
  crypto_box_keypair: crypto_box_keypair,
  crypto_hash: crypto_hash,
  crypto_sign: crypto_sign,
  crypto_sign_keypair: crypto_sign_keypair,
  crypto_sign_open: crypto_sign_open,

  crypto_secretbox_KEYBYTES: crypto_secretbox_KEYBYTES,
  crypto_secretbox_NONCEBYTES: crypto_secretbox_NONCEBYTES,
  crypto_secretbox_ZEROBYTES: crypto_secretbox_ZEROBYTES,
  crypto_secretbox_BOXZEROBYTES: crypto_secretbox_BOXZEROBYTES,
  crypto_scalarmult_BYTES: crypto_scalarmult_BYTES,
  crypto_scalarmult_SCALARBYTES: crypto_scalarmult_SCALARBYTES,
  crypto_box_PUBLICKEYBYTES: crypto_box_PUBLICKEYBYTES,
  crypto_box_SECRETKEYBYTES: crypto_box_SECRETKEYBYTES,
  crypto_box_BEFORENMBYTES: crypto_box_BEFORENMBYTES,
  crypto_box_NONCEBYTES: crypto_box_NONCEBYTES,
  crypto_box_ZEROBYTES: crypto_box_ZEROBYTES,
  crypto_box_BOXZEROBYTES: crypto_box_BOXZEROBYTES,
  crypto_sign_BYTES: crypto_sign_BYTES,
  crypto_sign_PUBLICKEYBYTES: crypto_sign_PUBLICKEYBYTES,
  crypto_sign_SECRETKEYBYTES: crypto_sign_SECRETKEYBYTES,
  crypto_sign_SEEDBYTES: crypto_sign_SEEDBYTES,
  crypto_hash_BYTES: crypto_hash_BYTES
};

/* High-level API */

function checkLengths(k, n) {
  if (k.length !== crypto_secretbox_KEYBYTES) throw new Error('bad key size');
  if (n.length !== crypto_secretbox_NONCEBYTES) throw new Error('bad nonce size');
}

function checkBoxLengths(pk, sk) {
  if (pk.length !== crypto_box_PUBLICKEYBYTES) throw new Error('bad public key size');
  if (sk.length !== crypto_box_SECRETKEYBYTES) throw new Error('bad secret key size');
}

function checkArrayTypes() {
  for (var i = 0; i < arguments.length; i++) {
    if (!(arguments[i] instanceof Uint8Array))
      throw new TypeError('unexpected type, use Uint8Array');
  }
}

function cleanup(arr) {
  for (var i = 0; i < arr.length; i++) arr[i] = 0;
}

nacl.randomBytes = function(n) {
  var b = new Uint8Array(n);
  randombytes(b, n);
  return b;
};

nacl.secretbox = function(msg, nonce, key) {
  checkArrayTypes(msg, nonce, key);
  checkLengths(key, nonce);
  var m = new Uint8Array(crypto_secretbox_ZEROBYTES + msg.length);
  var c = new Uint8Array(m.length);
  for (var i = 0; i < msg.length; i++) m[i+crypto_secretbox_ZEROBYTES] = msg[i];
  crypto_secretbox(c, m, m.length, nonce, key);
  return c.subarray(crypto_secretbox_BOXZEROBYTES);
};

nacl.secretbox.open = function(box, nonce, key) {
  checkArrayTypes(box, nonce, key);
  checkLengths(key, nonce);
  var c = new Uint8Array(crypto_secretbox_BOXZEROBYTES + box.length);
  var m = new Uint8Array(c.length);
  for (var i = 0; i < box.length; i++) c[i+crypto_secretbox_BOXZEROBYTES] = box[i];
  if (c.length < 32) return null;
  if (crypto_secretbox_open(m, c, c.length, nonce, key) !== 0) return null;
  return m.subarray(crypto_secretbox_ZEROBYTES);
};

nacl.secretbox.keyLength = crypto_secretbox_KEYBYTES;
nacl.secretbox.nonceLength = crypto_secretbox_NONCEBYTES;
nacl.secretbox.overheadLength = crypto_secretbox_BOXZEROBYTES;

nacl.scalarMult = function(n, p) {
  checkArrayTypes(n, p);
  if (n.length !== crypto_scalarmult_SCALARBYTES) throw new Error('bad n size');
  if (p.length !== crypto_scalarmult_BYTES) throw new Error('bad p size');
  var q = new Uint8Array(crypto_scalarmult_BYTES);
  crypto_scalarmult(q, n, p);
  return q;
};

nacl.scalarMult.base = function(n) {
  checkArrayTypes(n);
  if (n.length !== crypto_scalarmult_SCALARBYTES) throw new Error('bad n size');
  var q = new Uint8Array(crypto_scalarmult_BYTES);
  crypto_scalarmult_base(q, n);
  return q;
};

nacl.scalarMult.scalarLength = crypto_scalarmult_SCALARBYTES;
nacl.scalarMult.groupElementLength = crypto_scalarmult_BYTES;

nacl.box = function(msg, nonce, publicKey, secretKey) {
  var k = nacl.box.before(publicKey, secretKey);
  return nacl.secretbox(msg, nonce, k);
};

nacl.box.before = function(publicKey, secretKey) {
  checkArrayTypes(publicKey, secretKey);
  checkBoxLengths(publicKey, secretKey);
  var k = new Uint8Array(crypto_box_BEFORENMBYTES);
  crypto_box_beforenm(k, publicKey, secretKey);
  return k;
};

nacl.box.after = nacl.secretbox;

nacl.box.open = function(msg, nonce, publicKey, secretKey) {
  var k = nacl.box.before(publicKey, secretKey);
  return nacl.secretbox.open(msg, nonce, k);
};

nacl.box.open.after = nacl.secretbox.open;

nacl.box.keyPair = function() {
  var pk = new Uint8Array(crypto_box_PUBLICKEYBYTES);
  var sk = new Uint8Array(crypto_box_SECRETKEYBYTES);
  crypto_box_keypair(pk, sk);
  return {publicKey: pk, secretKey: sk};
};

nacl.box.keyPair.fromSecretKey = function(secretKey) {
  checkArrayTypes(secretKey);
  if (secretKey.length !== crypto_box_SECRETKEYBYTES)
    throw new Error('bad secret key size');
  var pk = new Uint8Array(crypto_box_PUBLICKEYBYTES);
  crypto_scalarmult_base(pk, secretKey);
  return {publicKey: pk, secretKey: new Uint8Array(secretKey)};
};

nacl.box.publicKeyLength = crypto_box_PUBLICKEYBYTES;
nacl.box.secretKeyLength = crypto_box_SECRETKEYBYTES;
nacl.box.sharedKeyLength = crypto_box_BEFORENMBYTES;
nacl.box.nonceLength = crypto_box_NONCEBYTES;
nacl.box.overheadLength = nacl.secretbox.overheadLength;

nacl.sign = function(msg, secretKey) {
  checkArrayTypes(msg, secretKey);
  if (secretKey.length !== crypto_sign_SECRETKEYBYTES)
    throw new Error('bad secret key size');
  var signedMsg = new Uint8Array(crypto_sign_BYTES+msg.length);
  crypto_sign(signedMsg, msg, msg.length, secretKey);
  return signedMsg;
};

nacl.sign.open = function(signedMsg, publicKey) {
  checkArrayTypes(signedMsg, publicKey);
  if (publicKey.length !== crypto_sign_PUBLICKEYBYTES)
    throw new Error('bad public key size');
  var tmp = new Uint8Array(signedMsg.length);
  var mlen = crypto_sign_open(tmp, signedMsg, signedMsg.length, publicKey);
  if (mlen < 0) return null;
  var m = new Uint8Array(mlen);
  for (var i = 0; i < m.length; i++) m[i] = tmp[i];
  return m;
};

nacl.sign.detached = function(msg, secretKey) {
  var signedMsg = nacl.sign(msg, secretKey);
  var sig = new Uint8Array(crypto_sign_BYTES);
  for (var i = 0; i < sig.length; i++) sig[i] = signedMsg[i];
  return sig;
};

nacl.sign.detached.verify = function(msg, sig, publicKey) {
  checkArrayTypes(msg, sig, publicKey);
  if (sig.length !== crypto_sign_BYTES)
    throw new Error('bad signature size');
  if (publicKey.length !== crypto_sign_PUBLICKEYBYTES)
    throw new Error('bad public key size');
  var sm = new Uint8Array(crypto_sign_BYTES + msg.length);
  var m = new Uint8Array(crypto_sign_BYTES + msg.length);
  var i;
  for (i = 0; i < crypto_sign_BYTES; i++) sm[i] = sig[i];
  for (i = 0; i < msg.length; i++) sm[i+crypto_sign_BYTES] = msg[i];
  return (crypto_sign_open(m, sm, sm.length, publicKey) >= 0);
};

nacl.sign.keyPair = function() {
  var pk = new Uint8Array(crypto_sign_PUBLICKEYBYTES);
  var sk = new Uint8Array(crypto_sign_SECRETKEYBYTES);
  crypto_sign_keypair(pk, sk);
  return {publicKey: pk, secretKey: sk};
};

nacl.sign.keyPair.fromSecretKey = function(secretKey) {
  checkArrayTypes(secretKey);
  if (secretKey.length !== crypto_sign_SECRETKEYBYTES)
    throw new Error('bad secret key size');
  var pk = new Uint8Array(crypto_sign_PUBLICKEYBYTES);
  for (var i = 0; i < pk.length; i++) pk[i] = secretKey[32+i];
  return {publicKey: pk, secretKey: new Uint8Array(secretKey)};
};

nacl.sign.keyPair.fromSeed = function(seed) {
  checkArrayTypes(seed);
  if (seed.length !== crypto_sign_SEEDBYTES)
    throw new Error('bad seed size');
  var pk = new Uint8Array(crypto_sign_PUBLICKEYBYTES);
  var sk = new Uint8Array(crypto_sign_SECRETKEYBYTES);
  for (var i = 0; i < 32; i++) sk[i] = seed[i];
  crypto_sign_keypair(pk, sk, true);
  return {publicKey: pk, secretKey: sk};
};

nacl.sign.publicKeyLength = crypto_sign_PUBLICKEYBYTES;
nacl.sign.secretKeyLength = crypto_sign_SECRETKEYBYTES;
nacl.sign.seedLength = crypto_sign_SEEDBYTES;
nacl.sign.signatureLength = crypto_sign_BYTES;

nacl.hash = function(msg) {
  checkArrayTypes(msg);
  var h = new Uint8Array(crypto_hash_BYTES);
  crypto_hash(h, msg, msg.length);
  return h;
};

nacl.hash.hashLength = crypto_hash_BYTES;

nacl.verify = function(x, y) {
  checkArrayTypes(x, y);
  // Zero length arguments are considered not equal.
  if (x.length === 0 || y.length === 0) return false;
  if (x.length !== y.length) return false;
  return (vn(x, 0, y, 0, x.length) === 0) ? true : false;
};

nacl.setPRNG = function(fn) {
  randombytes = fn;
};

(function() {
  // Initialize PRNG if environment provides CSPRNG.
  // If not, methods calling randombytes will throw.
  var crypto = typeof self !== 'undefined' ? (self.crypto || self.msCrypto) : null;
  if (crypto && crypto.getRandomValues) {
    // Browsers.
    var QUOTA = 65536;
    nacl.setPRNG(function(x, n) {
      var i, v = new Uint8Array(n);
      for (i = 0; i < n; i += QUOTA) {
        crypto.getRandomValues(v.subarray(i, i + Math.min(n - i, QUOTA)));
      }
      for (i = 0; i < n; i++) x[i] = v[i];
      cleanup(v);
    });
  } else if (typeof require !== 'undefined') {
    // Node.js.
    crypto = require('crypto');
    if (crypto && crypto.randomBytes) {
      nacl.setPRNG(function(x, n) {
        var i, v = crypto.randomBytes(n);
        for (i = 0; i < n; i++) x[i] = v[i];
        cleanup(v);
      });
    }
  }
})();

})(typeof module !== 'undefined' && module.exports ? module.exports : (self.nacl = self.nacl || {}));

},{"crypto":22}],55:[function(require,module,exports){
(function (global){

/**
 * Module exports.
 */

module.exports = deprecate;

/**
 * Mark that a method should not be used.
 * Returns a modified function which warns once by default.
 *
 * If `localStorage.noDeprecation = true` is set, then it is a no-op.
 *
 * If `localStorage.throwDeprecation = true` is set, then deprecated functions
 * will throw an Error when invoked.
 *
 * If `localStorage.traceDeprecation = true` is set, then deprecated functions
 * will invoke `console.trace()` instead of `console.error()`.
 *
 * @param {Function} fn - the function to deprecate
 * @param {String} msg - the string to print to the console when `fn` is invoked
 * @returns {Function} a new "deprecated" version of `fn`
 * @api public
 */

function deprecate (fn, msg) {
  if (config('noDeprecation')) {
    return fn;
  }

  var warned = false;
  function deprecated() {
    if (!warned) {
      if (config('throwDeprecation')) {
        throw new Error(msg);
      } else if (config('traceDeprecation')) {
        console.trace(msg);
      } else {
        console.warn(msg);
      }
      warned = true;
    }
    return fn.apply(this, arguments);
  }

  return deprecated;
}

/**
 * Checks `localStorage` for boolean values for the given `name`.
 *
 * @param {String} name
 * @returns {Boolean}
 * @api private
 */

function config (name) {
  // accessing global.localStorage can trigger a DOMException in sandboxed iframes
  try {
    if (!global.localStorage) return false;
  } catch (_) {
    return false;
  }
  var val = global.localStorage[name];
  if (null == val) return false;
  return String(val).toLowerCase() === 'true';
}

}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{}],56:[function(require,module,exports){
arguments[4][31][0].apply(exports,arguments)
},{"dup":31}],57:[function(require,module,exports){
module.exports = function isBuffer(arg) {
  return arg && typeof arg === 'object'
    && typeof arg.copy === 'function'
    && typeof arg.fill === 'function'
    && typeof arg.readUInt8 === 'function';
}
},{}],58:[function(require,module,exports){
(function (process,global){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

var formatRegExp = /%[sdj%]/g;
exports.format = function(f) {
  if (!isString(f)) {
    var objects = [];
    for (var i = 0; i < arguments.length; i++) {
      objects.push(inspect(arguments[i]));
    }
    return objects.join(' ');
  }

  var i = 1;
  var args = arguments;
  var len = args.length;
  var str = String(f).replace(formatRegExp, function(x) {
    if (x === '%%') return '%';
    if (i >= len) return x;
    switch (x) {
      case '%s': return String(args[i++]);
      case '%d': return Number(args[i++]);
      case '%j':
        try {
          return JSON.stringify(args[i++]);
        } catch (_) {
          return '[Circular]';
        }
      default:
        return x;
    }
  });
  for (var x = args[i]; i < len; x = args[++i]) {
    if (isNull(x) || !isObject(x)) {
      str += ' ' + x;
    } else {
      str += ' ' + inspect(x);
    }
  }
  return str;
};


// Mark that a method should not be used.
// Returns a modified function which warns once by default.
// If --no-deprecation is set, then it is a no-op.
exports.deprecate = function(fn, msg) {
  // Allow for deprecating things in the process of starting up.
  if (isUndefined(global.process)) {
    return function() {
      return exports.deprecate(fn, msg).apply(this, arguments);
    };
  }

  if (process.noDeprecation === true) {
    return fn;
  }

  var warned = false;
  function deprecated() {
    if (!warned) {
      if (process.throwDeprecation) {
        throw new Error(msg);
      } else if (process.traceDeprecation) {
        console.trace(msg);
      } else {
        console.error(msg);
      }
      warned = true;
    }
    return fn.apply(this, arguments);
  }

  return deprecated;
};


var debugs = {};
var debugEnviron;
exports.debuglog = function(set) {
  if (isUndefined(debugEnviron))
    debugEnviron = process.env.NODE_DEBUG || '';
  set = set.toUpperCase();
  if (!debugs[set]) {
    if (new RegExp('\\b' + set + '\\b', 'i').test(debugEnviron)) {
      var pid = process.pid;
      debugs[set] = function() {
        var msg = exports.format.apply(exports, arguments);
        console.error('%s %d: %s', set, pid, msg);
      };
    } else {
      debugs[set] = function() {};
    }
  }
  return debugs[set];
};


/**
 * Echos the value of a value. Trys to print the value out
 * in the best way possible given the different types.
 *
 * @param {Object} obj The object to print out.
 * @param {Object} opts Optional options object that alters the output.
 */
/* legacy: obj, showHidden, depth, colors*/
function inspect(obj, opts) {
  // default options
  var ctx = {
    seen: [],
    stylize: stylizeNoColor
  };
  // legacy...
  if (arguments.length >= 3) ctx.depth = arguments[2];
  if (arguments.length >= 4) ctx.colors = arguments[3];
  if (isBoolean(opts)) {
    // legacy...
    ctx.showHidden = opts;
  } else if (opts) {
    // got an "options" object
    exports._extend(ctx, opts);
  }
  // set default options
  if (isUndefined(ctx.showHidden)) ctx.showHidden = false;
  if (isUndefined(ctx.depth)) ctx.depth = 2;
  if (isUndefined(ctx.colors)) ctx.colors = false;
  if (isUndefined(ctx.customInspect)) ctx.customInspect = true;
  if (ctx.colors) ctx.stylize = stylizeWithColor;
  return formatValue(ctx, obj, ctx.depth);
}
exports.inspect = inspect;


// http://en.wikipedia.org/wiki/ANSI_escape_code#graphics
inspect.colors = {
  'bold' : [1, 22],
  'italic' : [3, 23],
  'underline' : [4, 24],
  'inverse' : [7, 27],
  'white' : [37, 39],
  'grey' : [90, 39],
  'black' : [30, 39],
  'blue' : [34, 39],
  'cyan' : [36, 39],
  'green' : [32, 39],
  'magenta' : [35, 39],
  'red' : [31, 39],
  'yellow' : [33, 39]
};

// Don't use 'blue' not visible on cmd.exe
inspect.styles = {
  'special': 'cyan',
  'number': 'yellow',
  'boolean': 'yellow',
  'undefined': 'grey',
  'null': 'bold',
  'string': 'green',
  'date': 'magenta',
  // "name": intentionally not styling
  'regexp': 'red'
};


function stylizeWithColor(str, styleType) {
  var style = inspect.styles[styleType];

  if (style) {
    return '\u001b[' + inspect.colors[style][0] + 'm' + str +
           '\u001b[' + inspect.colors[style][1] + 'm';
  } else {
    return str;
  }
}


function stylizeNoColor(str, styleType) {
  return str;
}


function arrayToHash(array) {
  var hash = {};

  array.forEach(function(val, idx) {
    hash[val] = true;
  });

  return hash;
}


function formatValue(ctx, value, recurseTimes) {
  // Provide a hook for user-specified inspect functions.
  // Check that value is an object with an inspect function on it
  if (ctx.customInspect &&
      value &&
      isFunction(value.inspect) &&
      // Filter out the util module, it's inspect function is special
      value.inspect !== exports.inspect &&
      // Also filter out any prototype objects using the circular check.
      !(value.constructor && value.constructor.prototype === value)) {
    var ret = value.inspect(recurseTimes, ctx);
    if (!isString(ret)) {
      ret = formatValue(ctx, ret, recurseTimes);
    }
    return ret;
  }

  // Primitive types cannot have properties
  var primitive = formatPrimitive(ctx, value);
  if (primitive) {
    return primitive;
  }

  // Look up the keys of the object.
  var keys = Object.keys(value);
  var visibleKeys = arrayToHash(keys);

  if (ctx.showHidden) {
    keys = Object.getOwnPropertyNames(value);
  }

  // IE doesn't make error fields non-enumerable
  // http://msdn.microsoft.com/en-us/library/ie/dww52sbt(v=vs.94).aspx
  if (isError(value)
      && (keys.indexOf('message') >= 0 || keys.indexOf('description') >= 0)) {
    return formatError(value);
  }

  // Some type of object without properties can be shortcutted.
  if (keys.length === 0) {
    if (isFunction(value)) {
      var name = value.name ? ': ' + value.name : '';
      return ctx.stylize('[Function' + name + ']', 'special');
    }
    if (isRegExp(value)) {
      return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
    }
    if (isDate(value)) {
      return ctx.stylize(Date.prototype.toString.call(value), 'date');
    }
    if (isError(value)) {
      return formatError(value);
    }
  }

  var base = '', array = false, braces = ['{', '}'];

  // Make Array say that they are Array
  if (isArray(value)) {
    array = true;
    braces = ['[', ']'];
  }

  // Make functions say that they are functions
  if (isFunction(value)) {
    var n = value.name ? ': ' + value.name : '';
    base = ' [Function' + n + ']';
  }

  // Make RegExps say that they are RegExps
  if (isRegExp(value)) {
    base = ' ' + RegExp.prototype.toString.call(value);
  }

  // Make dates with properties first say the date
  if (isDate(value)) {
    base = ' ' + Date.prototype.toUTCString.call(value);
  }

  // Make error with message first say the error
  if (isError(value)) {
    base = ' ' + formatError(value);
  }

  if (keys.length === 0 && (!array || value.length == 0)) {
    return braces[0] + base + braces[1];
  }

  if (recurseTimes < 0) {
    if (isRegExp(value)) {
      return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
    } else {
      return ctx.stylize('[Object]', 'special');
    }
  }

  ctx.seen.push(value);

  var output;
  if (array) {
    output = formatArray(ctx, value, recurseTimes, visibleKeys, keys);
  } else {
    output = keys.map(function(key) {
      return formatProperty(ctx, value, recurseTimes, visibleKeys, key, array);
    });
  }

  ctx.seen.pop();

  return reduceToSingleString(output, base, braces);
}


function formatPrimitive(ctx, value) {
  if (isUndefined(value))
    return ctx.stylize('undefined', 'undefined');
  if (isString(value)) {
    var simple = '\'' + JSON.stringify(value).replace(/^"|"$/g, '')
                                             .replace(/'/g, "\\'")
                                             .replace(/\\"/g, '"') + '\'';
    return ctx.stylize(simple, 'string');
  }
  if (isNumber(value))
    return ctx.stylize('' + value, 'number');
  if (isBoolean(value))
    return ctx.stylize('' + value, 'boolean');
  // For some reason typeof null is "object", so special case here.
  if (isNull(value))
    return ctx.stylize('null', 'null');
}


function formatError(value) {
  return '[' + Error.prototype.toString.call(value) + ']';
}


function formatArray(ctx, value, recurseTimes, visibleKeys, keys) {
  var output = [];
  for (var i = 0, l = value.length; i < l; ++i) {
    if (hasOwnProperty(value, String(i))) {
      output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
          String(i), true));
    } else {
      output.push('');
    }
  }
  keys.forEach(function(key) {
    if (!key.match(/^\d+$/)) {
      output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
          key, true));
    }
  });
  return output;
}


function formatProperty(ctx, value, recurseTimes, visibleKeys, key, array) {
  var name, str, desc;
  desc = Object.getOwnPropertyDescriptor(value, key) || { value: value[key] };
  if (desc.get) {
    if (desc.set) {
      str = ctx.stylize('[Getter/Setter]', 'special');
    } else {
      str = ctx.stylize('[Getter]', 'special');
    }
  } else {
    if (desc.set) {
      str = ctx.stylize('[Setter]', 'special');
    }
  }
  if (!hasOwnProperty(visibleKeys, key)) {
    name = '[' + key + ']';
  }
  if (!str) {
    if (ctx.seen.indexOf(desc.value) < 0) {
      if (isNull(recurseTimes)) {
        str = formatValue(ctx, desc.value, null);
      } else {
        str = formatValue(ctx, desc.value, recurseTimes - 1);
      }
      if (str.indexOf('\n') > -1) {
        if (array) {
          str = str.split('\n').map(function(line) {
            return '  ' + line;
          }).join('\n').substr(2);
        } else {
          str = '\n' + str.split('\n').map(function(line) {
            return '   ' + line;
          }).join('\n');
        }
      }
    } else {
      str = ctx.stylize('[Circular]', 'special');
    }
  }
  if (isUndefined(name)) {
    if (array && key.match(/^\d+$/)) {
      return str;
    }
    name = JSON.stringify('' + key);
    if (name.match(/^"([a-zA-Z_][a-zA-Z_0-9]*)"$/)) {
      name = name.substr(1, name.length - 2);
      name = ctx.stylize(name, 'name');
    } else {
      name = name.replace(/'/g, "\\'")
                 .replace(/\\"/g, '"')
                 .replace(/(^"|"$)/g, "'");
      name = ctx.stylize(name, 'string');
    }
  }

  return name + ': ' + str;
}


function reduceToSingleString(output, base, braces) {
  var numLinesEst = 0;
  var length = output.reduce(function(prev, cur) {
    numLinesEst++;
    if (cur.indexOf('\n') >= 0) numLinesEst++;
    return prev + cur.replace(/\u001b\[\d\d?m/g, '').length + 1;
  }, 0);

  if (length > 60) {
    return braces[0] +
           (base === '' ? '' : base + '\n ') +
           ' ' +
           output.join(',\n  ') +
           ' ' +
           braces[1];
  }

  return braces[0] + base + ' ' + output.join(', ') + ' ' + braces[1];
}


// NOTE: These type checking functions intentionally don't use `instanceof`
// because it is fragile and can be easily faked with `Object.create()`.
function isArray(ar) {
  return Array.isArray(ar);
}
exports.isArray = isArray;

function isBoolean(arg) {
  return typeof arg === 'boolean';
}
exports.isBoolean = isBoolean;

function isNull(arg) {
  return arg === null;
}
exports.isNull = isNull;

function isNullOrUndefined(arg) {
  return arg == null;
}
exports.isNullOrUndefined = isNullOrUndefined;

function isNumber(arg) {
  return typeof arg === 'number';
}
exports.isNumber = isNumber;

function isString(arg) {
  return typeof arg === 'string';
}
exports.isString = isString;

function isSymbol(arg) {
  return typeof arg === 'symbol';
}
exports.isSymbol = isSymbol;

function isUndefined(arg) {
  return arg === void 0;
}
exports.isUndefined = isUndefined;

function isRegExp(re) {
  return isObject(re) && objectToString(re) === '[object RegExp]';
}
exports.isRegExp = isRegExp;

function isObject(arg) {
  return typeof arg === 'object' && arg !== null;
}
exports.isObject = isObject;

function isDate(d) {
  return isObject(d) && objectToString(d) === '[object Date]';
}
exports.isDate = isDate;

function isError(e) {
  return isObject(e) &&
      (objectToString(e) === '[object Error]' || e instanceof Error);
}
exports.isError = isError;

function isFunction(arg) {
  return typeof arg === 'function';
}
exports.isFunction = isFunction;

function isPrimitive(arg) {
  return arg === null ||
         typeof arg === 'boolean' ||
         typeof arg === 'number' ||
         typeof arg === 'string' ||
         typeof arg === 'symbol' ||  // ES6 symbol
         typeof arg === 'undefined';
}
exports.isPrimitive = isPrimitive;

exports.isBuffer = require('./support/isBuffer');

function objectToString(o) {
  return Object.prototype.toString.call(o);
}


function pad(n) {
  return n < 10 ? '0' + n.toString(10) : n.toString(10);
}


var months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep',
              'Oct', 'Nov', 'Dec'];

// 26 Feb 16:19:34
function timestamp() {
  var d = new Date();
  var time = [pad(d.getHours()),
              pad(d.getMinutes()),
              pad(d.getSeconds())].join(':');
  return [d.getDate(), months[d.getMonth()], time].join(' ');
}


// log is just a thin wrapper to console.log that prepends a timestamp
exports.log = function() {
  console.log('%s - %s', timestamp(), exports.format.apply(exports, arguments));
};


/**
 * Inherit the prototype methods from one constructor into another.
 *
 * The Function.prototype.inherits from lang.js rewritten as a standalone
 * function (not on Function.prototype). NOTE: If this file is to be loaded
 * during bootstrapping this function needs to be rewritten using some native
 * functions as prototype setup using normal JavaScript does not work as
 * expected during bootstrapping (see mirror.js in r114903).
 *
 * @param {function} ctor Constructor function which needs to inherit the
 *     prototype.
 * @param {function} superCtor Constructor function to inherit prototype from.
 */
exports.inherits = require('inherits');

exports._extend = function(origin, add) {
  // Don't do anything if add isn't an object
  if (!add || !isObject(add)) return origin;

  var keys = Object.keys(add);
  var i = keys.length;
  while (i--) {
    origin[keys[i]] = add[keys[i]];
  }
  return origin;
};

function hasOwnProperty(obj, prop) {
  return Object.prototype.hasOwnProperty.call(obj, prop);
}

}).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"./support/isBuffer":57,"_process":36,"inherits":56}]},{},[1]);