Sending a Bundle Transaction

import { providers, Wallet } from "ethers.js";
import { FlashbotsBundleProvider } from "@flashbots/ethers-provider-bundle";
const provider = new providers.JsonRpcProvider({ url: ETHEREUM_RPC_URL });
// Standard json rpc provider directly from ethers.js. For example you can use Infura, Alchemy, or your own node.

const authSigner = new Wallet("0x0000000000000000000000000000000000000000000000000000000000000000");

// `authSigner` is an Ethereum private key that does NOT store funds and is NOT your bot's primary key.
// This is an identifying key for signing payloads to establish reputation and whitelisting

const flashbotsProvider = await FlashbotsBundleProvider.create(provider, authSigner);
// Flashbots provider requires passing in a standard provider and an auth signer

const ethers = require("ethers.js");
const { FlashbotsBundleProvider } = require("@flashbots/ethers-provider-bundle");
const provider = new ethers.providers.JsonRpcProvider({
    url: ETHEREUM_RPC_URL,
});

const authSigner = new ethers.Wallet("0x2000000000000000000000000000000000000000000000000000000000000000");
const flashbotsProvider = await FlashbotsBundleProvider.create(provider, authSigner);

const signedBundle = await flashbotsProvider.signBundle([
    {
        signer: SOME_SIGNER_TO_SEND_FROM,
        transaction: SOME_TRANSACTION_TO_SEND,
    },
]);

const bundleReceipt = await flashbotsProvider.sendRawBundle(signedBundle, TARGET_BLOCK_NUMBER);