@fordefi-public/crypto-address-validator-ts/dist/validators/bip173_validator.js

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

const bech32 = require('../crypto/externals/bech32');
const DEFAULT_NETWORK_TYPE = 'prod';
// bip 173 bech 32 addresses (https://github.com/bitcoin/bips/blob/master/bip-0173.mediawiki)
export function isValidAddress(address, currency, opts) {
    const networkType = opts ? opts.networkType : DEFAULT_NETWORK_TYPE;
    const decoded = bech32.decode(address, bech32.encodings.BECH32);
    if (!decoded) {
        return false;
    }
    const bech32Hrp = decoded.hrp;
    let correctBech32Hrps;
    if (networkType === 'prod' || networkType === 'testnet') {
        correctBech32Hrps = currency.bech32Hrp[networkType];
    }
    else if (currency.bech32Hrp) {
        correctBech32Hrps = currency.bech32Hrp.prod.concat(currency.bech32Hrp.testnet);
    }
    else {
        return false;
    }
    if (correctBech32Hrps.indexOf(bech32Hrp) === -1) {
        return false;
    }
    return true;
}
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