Flashbots ENS domain transfer

ensDomainTransfer.js

const hre = require('hardhat');

const { map } = require('underscore');

require('dotenv').config();

const {
  FlashbotsBundleProvider,
} = require('@flashbots/ethers-provider-bundle');
const ENS = require('./ENSABI.json');
const FlashBotsABI = require('./FlashBotsABI.json');

const { provider } = hre.ethers;

const ENSAddr = '0x57f1887a8BF19b14fC0dF6Fd9B2acc9Af147eA85';

const FlashbotsCheckAndSendAddr = '0xC4595E3966e0Ce6E3c46854647611940A09448d3';

async function main() {
  const flashbotsProvider = await FlashbotsBundleProvider.create(
    provider,
    process.env.FLASHBOTS_KEY_ID,
    process.env.FLASHBOTS_SECRET
  );

  const ERC721 = new hre.ethers.Contract(ENSAddr, ENS, provider);

  const FlashbotsCheckAndSend = new hre.ethers.Contract(
    FlashbotsCheckAndSendAddr,
    FlashBotsABI,
    provider
  );

  const rogue = new hre.ethers.Wallet(process.env.ROGUE_PRIV_KEY, provider);

  const user = new hre.ethers.Wallet(process.env.USER_PRIV_KEY, provider);

  const transferENSDomain = await ERC721.populateTransaction.transferFrom(
    rogue.address,
    user.address,
    process.env.ENS_DOMAIN_ID,
    {
      from: rogue.address,
      gasPrice: hre.ethers.BigNumber.from('0'),
      gasLimit: hre.ethers.BigNumber.from('400000'),
    }
  );

  const checkDomainOwner = await ERC721.populateTransaction.ownerOf(
    process.env.ENS_DOMAIN_ID
  );

  const payload = checkDomainOwner.data;

  // 32 bytes, encoded user address
  const expectedResponse =
    '0x000000000000000000000000d745c80485ef2792c5fdc02e879f0124756ea065';

  const checkAndSend = await FlashbotsCheckAndSend.populateTransaction.check32BytesAndSend(
    ENSAddr,
    payload,
    expectedResponse,
    {
      gasPrice: hre.ethers.BigNumber.from('0'),
      gasLimit: hre.ethers.BigNumber.from('400000'),
      value: hre.ethers.utils.parseEther('0.04'),
    }
  );

  const blockNumber = await provider.getBlockNumber();
  const bundlePromises = map([...Array(20).keys()], (targetBlockNumber) =>
    flashbotsProvider.sendBundle(
      [
        { signer: rogue, transaction: transferENSDomain },
        { signer: user, transaction: checkAndSend },
      ],
      targetBlockNumber + 1 + blockNumber
    )
  );

  for (const bundle of bundlePromises) {
    await (await bundle).wait();
  }

  await main();
}

main()
  .then(() => main())
  .catch((error) => {
    console.error(error);
    main();
  });