import { Transaction } from 'bitcoinjs-lib';
import * as bitcoin from 'bitcoinjs-lib';

const Number2Buffer = (num: number) => {
  // bigendia
  let str = num.toString(16);
  if (str.length & 1) str = '0' + str;
  return Buffer.from(str, 'hex');
};

export function issue_tx_mock(
  issue_id: number,
  vault_address: string,
  issue_value: number,
): Transaction {
  const valut_script = bitcoin.address.toOutputScript(vault_address);
  const tx = new bitcoin.Transaction();
  tx.addInput(Buffer.alloc(32, 1), 0, 4294967295, Buffer.alloc(32));
  tx.addOutput(valut_script, issue_value);
  if (issue_id != undefined) {
    const OpData = Number2Buffer(issue_id);
    const embed = bitcoin.payments.embed({ data: [OpData] });
    tx.addOutput(embed.output, 0);
  }
  return tx;
}