constellationJS

constellationJS worked directly with dappJS provides a Javascript library for Merkle tree state, with LevelUP persistence and a super simple interface.

constellationJS uses the ES6 Proxy API to give the best possible interface, it's just an object. Behind the scenes, constellationJS uses a Merkle AVL tree, which lets us do cool things like efficiently iterating through keys, making range proofs, etc. Since every child object is its own tree node, it's fast to update the db and recompute the hash even for very large states.

Install constellationJS (Adding to dappJS)

yarn add constellationsjs --save

let constellation = require('constellationsjs')

let state = await constellation(levelUpDb)

state.foo = 'bar'
state.baz = { x: 123, y: { z: 456 } }
delete state.baz.x

await constellation.commit(state)

constellation.rollback(state)

let rootHash = constellation.hash(state)

let proof = await constellation.proof(state, 'baz.y')

let value = constellation.verify(rootHash, proof, 'baz.y')

Version

0.1.4

LICENSE & ATTRIBUTES

Copyright 2018 Bench Computer, Inc.

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