BIP322-JS

A Javascript library that provides utility functions related to the BIP-322 signature scheme. This is a fork of https://github.com/ACken2/bip322-js with dependencies change in order to reduce audit load. No breaking API changes present at the moment.

Limitations

Only P2PKH, P2SH-P2WPKH, P2WPKH, and single-key-spend P2TR are supported in this library.

Documentation

Available at https://acken2.github.io/bip322-js/

Supported Features

1. Generate raw toSpend and toSign BIP-322 transactions
2. Sign a BIP-322 signature using a private key
3. Verify a simple BIP-322 signature

Example

// Import modules that are useful to you
const { BIP322, Signer, Verifier } = require('bip322-js')

// Signing a BIP-322 signature with a private key
const privateKey = 'L3VFeEujGtevx9w18HD1fhRbCH67Az2dpCymeRE1SoPK6XQtaN2k'
const address = 'bc1q9vza2e8x573nczrlzms0wvx3gsqjx7vavgkx0l'
const message = 'Hello World'
const signature = Signer.sign(privateKey, address, message)
console.log(signature)

// Verifying a simple BIP-322 signature
const validity = Verifier.verifySignature(address, message, signature)
console.log(validity) // True

// You can also get the raw unsigned BIP-322 toSpend and toSign transaction directly
const scriptPubKey = Buffer.from('00142b05d564e6a7a33c087f16e0f730d1440123799d', 'hex')
const toSpend = BIP322.buildToSpendTx(message, scriptPubKey) // bitcoin.Transaction
const toSpendTxId = toSpend.getId()
const toSign = BIP322.buildToSignTx(toSpendTxId, scriptPubKey) // bitcoin.Psbt
// Do whatever you want to do with the PSBT

More working examples can be found within the unit test for BIP322, Signer, and Verifier.