src/node_modules/validator/es/lib/isBtcAddress.js


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import assertString from './util/assertString'; // supports Bech32 addresses

var btc = /^(bc1|[13])[a-zA-HJ-NP-Z0-9]{25,39}$/;
export default function isBtcAddress(str) {
  assertString(str);
  return btc.test(str);
}