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    coinmsg

    0.1.3 • Public • Published

    coinmsg

    Message signing for Bitcoin and other cryptocurrencies.

    Install

    npm install --save coinmsg
    

    Example

    var coinmsg  = require('coinmsg'),
     
        privkey = new Buffer('e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855', 'hex'),
        addr    = '1F3sAm6ZtwLAUnj7d38pGFxtP3RVEvtsbV',
        message = 'Hello, World!'
     
    var sig = coinmsg.sign(privkey, message) // => Buffer
     
    coinmsg.verify(addr, sig, message) // => true
     
    // With other cryptocurrencies:
    var coinmsg = require('coinmsg')({
      coinname: 'DOGECOIN',
      curve: 'secp256k1', // optional, defaults to secp256k1
      magicPrefix: '\x19Dogecoin Signed Message:\n'
    })
     
    // ... and use coinmsg as above

    API

    Methods

    sign(privkey, message[, compressed])

    Sign message with privkey and return the signature as a Buffer.

    compressed defaults to true.

    verify(address|pubkey, sig, message)

    Verify that sig is valid signature for the message signed by address|pubkey.

    sig can be provided as a Buffer or base64 string.

    The first argument, address|pubkey, can either be an address provided as a String, or a public key provided as a Buffer.

    format(addr, sig, message)

    Return a "BEGIN BITCOIN SIGNED MESSAGE ..." formatted message.

    Other cryptocurrencies

    coinmsg({ coinname: ..., curve: ..., magicPrefix: ... })

    Returns an object with sign(), verify() and format() for the provided options.

    curve is optional and defaults to secp256k1

    Test

    $ git clone https://github.com/cryptocoinjs/coinmsg.git && cd coinmsg
    $ npm install && npm test
    

    License

    MIT

    Credits

    Based on the bitcoinjs-lib implementation.

    Install

    npm i coinmsg

    DownloadsWeekly Downloads

    9

    Version

    0.1.3

    License

    MIT

    Last publish

    Collaborators

    • nadav
    • vbuterin
    • midnightlightning
    • sidazhang
    • jprichardson