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

Multicoin address validator for Bitcoin and other Altcoins. TS version

"use strict";
var cryptoUtils = require('./crypto/utils');
var ALGORAND_CHECKSUM_BYTE_LENGTH = 4;
var ALGORAND_ADDRESS_LENGTH = 58;
module.exports = {
    isValidAddress: function (address, currency, opts) {
        if (opts === void 0) { opts = {}; }
        var _a = opts.networkType, networkType = _a === void 0 ? 'prod' : _a;
        return this.verifyChecksum(address);
    },
    verifyChecksum: function (address) {
        if (address.length !== ALGORAND_ADDRESS_LENGTH) {
            return false;
        }
        else {
            // Decode base32 Address
            var decoded = cryptoUtils.base32.b32decode(address);
            var addr = decoded.slice(0, decoded.length - ALGORAND_CHECKSUM_BYTE_LENGTH);
            var checksum = cryptoUtils.byteArray2hexStr(decoded.slice(-4)).toString('HEX');
            // Hash Address - Checksum
            var code = cryptoUtils.sha512_256(cryptoUtils.byteArray2hexStr(addr)).substr(-ALGORAND_CHECKSUM_BYTE_LENGTH * 2);
            return code === checksum;
        }
    }
};