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

Multicoin address validator for Bitcoin and other Altcoins. TS version

"use strict";
var base58 = require('./crypto/base58');
var cryptoUtils = require('./crypto/utils');
var prefix = new Uint8Array([6, 161, 159]);
function decodeRaw(buffer) {
    var payload = buffer.slice(0, -4);
    var checksum = buffer.slice(-4);
    var newChecksum = cryptoUtils.hexStr2byteArray(cryptoUtils.sha256x2(cryptoUtils.byteArray2hexStr(payload)));
    if (checksum[0] ^ newChecksum[0] |
        checksum[1] ^ newChecksum[1] |
        checksum[2] ^ newChecksum[2] |
        checksum[3] ^ newChecksum[3])
        return;
    return payload;
}
var isValidAddress = function (address) {
    try {
        var buffer = base58.decode(address);
        var payload = decodeRaw(buffer);
        if (!payload)
            return false;
        payload.slice(prefix.length);
        return true;
    }
    catch (e) {
        return false;
    }
};
module.exports = {
    isValidAddress: isValidAddress
};