wallet.ts

wallet.ts

A collection of utilities for building cryptocurrency wallets, written in TypeScript.

Hierarchical Deterministic Wallets (BIP 32)

const { randomBytes } = require('crypto')
const { HDKey } = require('wallet.ts')

const seed = randomBytes(66)

const masterKey = HDKey.parseMasterSeed(seed)
// => HDKey {...}

const extendedPrivateKey = masterKey.derive("m/44'/60'/0'/0").extendedPrivateKey
// => 'xprvA2FBfTJAyLjF5 ...'

const childKey = HDKey.parseExtendedKey(extendedPrivateKey)
// => HDKey {...}

const wallet = childKey.derive('0')
// => HDKey {...}

const walletPrivateKey = wallet.privateKey
// => <Buffer 44 04 ce 4a ...>

const walletPublicKey = wallet.publicKey
// => <Buffer 03 e9 f6 10 ...>

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Mnemonic code for generating deterministic keys (BIP 39)

const { randomBytes } = require('crypto')
const { Mnemonic } = require('wallet.ts')

const mnemonic = Mnemonic.generate(randomBytes(32))
// => Mnemonic {...}

const phrase = mnemonic.phrase
// => 'capital find public couple ...'

const words = mnemonic.words
// => [ 'capital', 'find', 'public', 'couple', ...]

const seed = mnemonic.toSeed()
// => <Buffer cd 07 60 43 ...>

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Bitcoin Address

const { BitcoinAddress } = require('wallet.ts')

const publicKey = Buffer.from(
  '0250863ad64a87ae8a2fe83c1af1a8403cb53f53e486d8511dad8a04887e5b2352',
  'hex'
)

const address = BitcoinAddress.from(publicKey).address
// => '16UwLL9Risc3QfPqBUvKofHmBQ7wMtjvM'

const valid = BitcoinAddress.isValid(address)
// => true

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Ethereum Address / EIP 55 checksum

const { EthereumAddress } = require('wallet.ts')

const publicKey = Buffer.from(
  '028a8c59fa27d1e0f1643081ff80c3cf0392902acbf76ab0dc9c414b8d115b0ab3',
  'hex'
)

const address = EthereumAddress.from(publicKey).address
// => 0xD11A13f484E2f2bD22d93c3C3131f61c05E876a

const valid = EthereumAddress.isValid(address)
// => true

const checksumAddress = EthereumAddress.checksumAddress('0xd11a13f484e2f2bd22d93c3c3131f61c05e876a')
// => 0xD11A13f484E2f2bD22d93c3C3131f61c05E876a

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Copyright © 2017 Peter Jihoon Kim. This project is licensed under the ISC license.