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 prefix = new Uint8Array([6, 161, 159]);
function decodeRaw(buffer) {
    let payload = buffer.slice(0, -4);
    let checksum = buffer.slice(-4);
    let 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;
}
export default {
    isValidAddress(address) {
        try {
            let buffer = base58.decode(getAddress(address));
            let payload = decodeRaw(buffer);
            if (!payload)
                return false;
            payload.slice(prefix.length);
            return true;
        }
        catch (e) {
            return false;
        }
    }
};