trezor-address-validator/src/nem_validator.js

Multicoin address validator for Bitcoin and other altcoins.

const { addressType } = require('../src/crypto/utils');
var cryptoUtils = require('./crypto/utils');

 /**
* Check if an address is valid
*
* @param {string} _address - An address
*
* @return {boolean} - True if address is valid, false otherwise
*/
var isValidAddress = function(_address) {
    var address = _address.toString().toUpperCase().replace(/-/g, '');
    if (!address || address.length !== 40) {
        return false;
    }
    var decoded = cryptoUtils.toHex(cryptoUtils.base32.b32decode(address));
    var stepThreeChecksum = cryptoUtils.keccak256Checksum(Buffer.from(decoded.slice(0, 42), 'hex'));

    return stepThreeChecksum === decoded.slice(42);
};

module.exports = {
    isValidAddress: isValidAddress,

    getAddressType: function(address, currency, networkType) {
        if (this.isValidAddress(address, currency, networkType)) {
            return addressType.ADDRESS;
        }
        return undefined;
    },
}