gistfile1.txt

import { ethers, providers, Wallet } from "ethers";
import { FlashbotsBundleProvider } from "@flashbots/ethers-provider-bundle";
import axios from 'axios';

async function fetchProof(address) {
  let resp = await axios({
    method: 'get',
    url: 'https://api.otherside.xyz/proofs/'+address,
  });
  return resp.data;
}

async function main() {
  let base = new ethers.providers.JsonRpcProvider({url: "http://127.0.0.1:8545/"})
  await base.ready
  let basews = new ethers.providers.WebSocketProvider("ws://127.0.0.1:8546/")
  console.log(await basews.getNetwork())

  const user = new ethers.Wallet('...key...', base);
  let provider = new FlashbotsBundleProvider(base, user, {url: 'https://relay.flashbots.net/'});

  const accounts = [
    new ethers.Wallet('...key...', base),
  ];

  const proofs = await Promise.all(accounts.map(x => fetchProof(x.address)));

  console.log(proofs);

  const CONTRACT_ADDRESS = "0x34d85c9CDeB23FA97cb08333b511ac86E1C4E258"
  const ABI = ["function mintLands(uint256,bytes32[])"]
  const contracts = accounts.map(x => new ethers.Contract(CONTRACT_ADDRESS, ABI, x))

  const txs = [
    {
      signer: accounts[0],
      transaction: await contracts[0].populateTransaction.mintLands(2, proofs[0], {
        gasPrice: "200000000000",
        gasLimit: "500000",
      })
    },
  ];

  basews.on('pending', async (tx) => {
    let trans = await basews.getTransaction(tx)

    if(!trans) return;
    if(trans.to !== "0x34d85c9CDeB23FA97cb08333b511ac86E1C4E258") return;

    if(trans.from.toLowerCase() !== "0xcda9742761cb069ff70b5cd5fcb8dd636a453961") return;

    console.log(trans)

    if(trans.data.substr(0, 10) !== "0x848d075e") return;

    console.log(trans)

    let alltxs = [
      {
        signedTransaction: ethers.utils.serializeTransaction(trans, {v: trans.v, r: trans.r, s: trans.s}),
      },
      txs[0],
    ];

    const blk = await base.getBlockNumber()

    const result = await provider.sendBundle(alltxs, blk + 1);
    console.log(result)
  })
}

main().catch(console.error)