multicoin-address-validator-ts/lib/lisk_validator.js

Multicoin address validator for Bitcoin and other Altcoins. TS version

"use strict";
var cryptoUtils = require('./crypto/utils');
var regexp = new RegExp('^[0-9]{1,20}L$');
module.exports = {
    isValidAddress: function (address) {
        if (!regexp.test(address)) {
            return false;
        }
        return this.verifyAddress(address);
    },
    verifyAddress: function (address) {
        var BUFFER_SIZE = 8;
        var bigNumber = address.substring(0, address.length - 1);
        var addressBufferO = cryptoUtils.bigNumberToBuffer(bigNumber);
        var addressBuffer = Buffer.from(cryptoUtils.base10ToBase256(bigNumber).reverse());
        return Buffer.from(addressBuffer).slice(0, BUFFER_SIZE).equals(addressBuffer);
    }
};