solutaut/src/siacoin_validator.js

Multicoin address validator for Bitcoin and other Altcoins.

var cryptoUtils = require('./crypto/utils')
var isEqual = require('lodash.isequal')

function hexToBytes(hex) {
  var bytes = []
  for (var c = 0; c < hex.length; c += 2) {
    bytes.push(parseInt(hex.substr(c, 2), 16))
  }
  return bytes
}

module.exports = {
  isValidAddress: function(address) {
    if (address.length !== 76) {
      // Check if it has the basic requirements of an address
      return false
    }

    // Otherwise check each case
    return this.verifyChecksum(address)
  },
  verifyChecksum: function(address) {
    var checksumBytes = address.slice(0, 32*2)
    var check = address.slice(32*2, 38*2)
    var blakeHash = cryptoUtils.blake2b(checksumBytes, 32).slice(0, 6*2)
    return !!isEqual(blakeHash, check)
  }
}