bitcoinjs-message

bitcoinjs-message

Examples

var bitcoin = require('bitcoinjs-lib') // v2.x.x
var bitcoinMessage = require('bitcoinjs-message')

Sign a Bitcoin message

var keyPair = bitcoin.ECPair.fromWIF('5KYZdUEo39z3FPrtuX2QbbwGnNP5zTd7yyr2SC1j299sBCnWjss')
var privateKey = keyPair.d.toBuffer(32)
var message = 'This is an example of a signed message.'
var messagePrefix = bitcoin.networks.bitcoin.messagePrefix

var signature = bitcoinMessage.sign(message, messagePrefix, privateKey, keyPair.compressed)
console.log(signature.toString('base64'))
// => 'G9L5yLFjti0QTHhPyFrZCT1V/MMnBtXKmoiKDZ78NDBjERki6ZTQZdSMCtkgoNmp17By9ItJr8o7ChX0XxY91nk='

Verify a Bitcoin message

var address = '1HZwkjkeaoZfTSaJxDw6aKkxp45agDiEzN'
var signature = 'HJLQlDWLyb1Ef8bQKEISzFbDAKctIlaqOpGbrk3YVtRsjmC61lpE5ErkPRUFtDKtx98vHFGUWlFhsh3DiW6N0rE'
var message = 'This is an example of a signed message.'
var messagePrefix = bitcoin.networks.bitcoin.messagePrefix

console.log(bitcoinMessage.verify(message, messagePrefix, address, signature))
// => true

LICENSE MIT