bitcoinjs-lib/ts_src/templates/nulldata.ts

// OP_RETURN {data}
import * as bscript from '../script';
const OPS = bscript.OPS;

export function check(script: Buffer | Array<number | Buffer>): boolean {
  const buffer = bscript.compile(script);

  return buffer.length > 1 && buffer[0] === OPS.OP_RETURN;
}
check.toJSON = () => {
  return 'null data output';
};

const output = { check };

export { output };