multicoin-address-validator-ts
Version:
Multicoin address validator for Bitcoin and other Altcoins. TS version
58 lines (57 loc) • 2.28 kB
JavaScript
;
var cryptoUtils = require('./crypto/utils');
var cnBase58 = require('./crypto/cnBase58');
var DEFAULT_NETWORK_TYPE = 'prod';
var addressRegTest = new RegExp('^[123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz]{95}$');
var integratedAddressRegTest = new RegExp('^[123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz]{106}$');
function validateNetwork(decoded, currency, networkType, addressType) {
var network = currency.addressTypes;
if (addressType == 'integrated') {
network = currency.iAddressTypes;
}
var at = parseInt(decoded.substr(0, 2), 16).toString();
switch (networkType) {
case 'prod':
return network.prod.indexOf(at) >= 0;
case 'testnet':
return network.testnet.indexOf(at) >= 0;
case 'stagenet':
return network.stagenet.indexOf(at) >= 0;
case 'both':
return network.prod.indexOf(at) >= 0 || network.testnet.indexOf(at) >= 0 || network.stagenet.indexOf(at) >= 0;
default:
return false;
}
}
function hextobin(hex) {
if (hex.length % 2 !== 0)
return null;
var res = new Uint8Array(hex.length / 2);
for (var i = 0; i < hex.length / 2; ++i) {
res[i] = parseInt(hex.slice(i * 2, i * 2 + 2), 16);
}
return res;
}
module.exports = {
isValidAddress: function (address, currency, opts) {
if (opts === void 0) { opts = {}; }
var _a = opts.networkType, networkType = _a === void 0 ? DEFAULT_NETWORK_TYPE : _a;
var addressType = 'standard';
if (!addressRegTest.test(address)) {
if (integratedAddressRegTest.test(address)) {
addressType = 'integrated';
}
else {
return false;
}
}
var decodedAddrStr = cnBase58.decode(address);
if (!decodedAddrStr)
return false;
if (!validateNetwork(decodedAddrStr, currency, networkType, addressType))
return false;
var addrChecksum = decodedAddrStr.slice(-8);
var hashChecksum = cryptoUtils.keccak256Checksum(hextobin(decodedAddrStr.slice(0, -8)));
return addrChecksum === hashChecksum;
}
};