multichain-address-validator/dist/esm/validators/tezos_validator.js

Multichain address validator for Bitcoin and other blockchains.

import base58 from '../crypto/base58.js';
import cryptoUtils from '../crypto/utils.js';
import { getAddress } from '../helpers.js';
const VALID_PREFIXES = [
    [6, 161, 159], // tz1 (ed25519)
    [6, 161, 161], // tz2 (secp256k1)
    [6, 161, 164], // tz3 (p256)
    [2, 90, 121], // KT1 (originated)
];
function decodeRaw(buffer) {
    const payload = buffer.slice(0, -4);
    const checksum = buffer.slice(-4);
    const 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;
}
function hasValidPrefix(payload) {
    return VALID_PREFIXES.some(prefix => prefix.every((byte, i) => payload[i] === byte));
}
export default {
    isValidAddress(address) {
        try {
            const buffer = base58.decode(getAddress(address));
            const payload = decodeRaw(buffer);
            if (!payload)
                return false;
            return hasValidPrefix(payload);
        }
        catch {
            return false;
        }
    }
};