Flashbots — Bundle and Simulate

Simulation Confirmed

In the previous lesson we covered the basics of Flashbots and installed some Python modules that allow us to communicate with the Flashbots relay.

In this lesson, we will do the following:

• Get some Ether for the Goerli testnet

• Connect to the Flashbots Goerli test relay

• Build two transactions

• Bundle the two transactions together

• Simulate the bundle via the Flashbots relay

• Submit the bundle for mining

Goerli Testnet

To interact with the Goerli testnet, you’ll need a node or a Goerli RPC. I recommend using the public RPC from Ankr, accessible from https://rpc.ankr.com/eth_goerli without the need to create an account.

To run tests on Goerli, you need Goerli Ether. Happily for us, testnet Ether is free. You can request 0.25 ETH using the Goerli Faucet.

We will use Brownie to manage our private keys, but otherwise this is a web3.py-centric lesson.

I recommend generating a dedicated account for playing on testnets. In Brownie, you can generate a new account with the command brownie accounts generate test_1 or similar. This will give you a mnemonic seed phrase and an external address, which you will use at the Goerli Faucet.

In this example I am using two generated accounts, test_1 and test_2, along with my dedicated flashbots_id account which is used exclusively for signing and reputation.

Prepare the Environment

This will feel quite familiar if you worked through the Snowsight posts.

Start a Python console and load the required modules: