MEV-share CTF script

backrunoooooooor.ts

```typescript
import { Wallet, JsonRpcProvider, TransactionRequest, toBigInt, keccak256 } from "ethers"
import MevShareClient, {
    IPendingTransaction, IPendingBundle, BundleParams
} from ".."
import Env from './lib/env'
import { Mutex } from "async-mutex"

const provider = new JsonRpcProvider(Env.providerUrl)
const authSigner = new Wallet(Env.authKey, provider)
const mevShareClient = MevShareClient.useEthereumGoerli(authSigner)
const NUM_TARGET_BLOCKS = 25;

async function main() {

    mevShareClient.on("transaction", async (tx: IPendingTransaction) => {        
        if (<CONDITION_HERE>) {
            console.log("found tx: " + tx.hash);
            const wallet = new Wallet(Env.senderKey).connect(provider);
            const feeData = await provider.getFeeData();//stop alchemy from shouting
            const unsignedtx: TransactionRequest = {
                type: 2,
                chainId: provider._network.chainId,
                to: "0x20a1A5857fDff817aa1BD8097027a841D4969AA5".toLocaleLowerCase(),
                nonce: await wallet.getNonce(),
                value: 0,
                gasLimit: 400000,
                data: "0xb88a802f",
                maxFeePerGas: toBigInt(feeData.maxFeePerGas || 42) + BigInt(1e3),
                maxPriorityFeePerGas: toBigInt(feeData.maxPriorityFeePerGas || 2) + BigInt(1e3),
            };

            const bundle = [
                { hash: tx.hash },
                { tx: await wallet.signTransaction(unsignedtx), canRevert: false },
            ]
            const targetBlock = await provider.getBlockNumber() + 1;
            const bundleParams: BundleParams = {
                inclusion: {
                    block: targetBlock,
                    maxBlock: await provider.getBlockNumber() + NUM_TARGET_BLOCKS,
                },
                body: bundle,
            }

            const bundleResult = await mevShareClient.sendBundle(bundleParams);
            console.log("sending bundle, bundleResult: ", bundleResult)

        }
    })


}
main();

```