@fordefi-public/crypto-address-validator-ts/dist/validators/nem_validator.js

Crypto address validator for Bitcoin and other Altcoins, forked to be used with typescript

import { toHex, keccak256Checksum } from '../crypto/utils';
const base32 = require('../crypto/externals/base32');
export function isValidAddress(_address) {
    const address = _address.toString().toUpperCase().replace(/-/g, '');
    if (!address || address.length !== 40) {
        return false;
    }
    const decoded = toHex(base32.b32decode(address));
    const stepThreeChecksum = keccak256Checksum(Buffer.from(decoded.slice(0, 42), 'hex'));
    return stepThreeChecksum === decoded.slice(42);
}
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