Web3 More Bundlers

This library works by injecting flashbots (bundler) as a new module in the Web3.py instance, which allows submitting "bundles" of transactions directly to miners. This is done by also creating a middleware which captures calls to eth_sendBundle and eth_callBundle, and sends them to an RPC endpoint which you have specified, which corresponds to mev-geth.

To apply correct headers we use the flashbot method which injects the correct header on POST.

This is a superset project of Flashbot's package for Web3.py, and originally adapted from TitanBuilder's PR (flashbots/web3-flashbots#76). Flashbots currently only supports Web3.py version ^5.22.0 (not >=6).

Quick Start

Installing

Install package with Poetry.

poetry add web3morebundlers

Example

import os

from eth_account.account import Account
from eth_account.signers.local import LocalAccount
from web3 import HTTPProvider, Web3

from web3morebundlers import bundler

ETH_ACCOUNT_SIGNATURE: LocalAccount = Account.from_key(os.environ.get("ETH_SIGNER_KEY"))
BUNDLER_ENDPOINTS = ["https://relay.flashbots.net", "https://rpc.titanbuilder.xyz", ...]

w3 = Web3(HTTPProvider("http://localhost:8545"))
bundler(w3=w3, signature_account=ETH_ACCOUNT_SIGNATURE, endpoint_uris=BUNDLER_ENDPOINTS)

Now the w3.flashbots.sendBundle method should be available to you. Look in examples/simple.py for usage examples.

Using Testnets

Currently, the base flashbots package only supports Goerli. To use Goerli, add the Goerli relay RPC to the bundler function arguments.

bundler(w3=w3, signature_account=ETH_ACCOUNT_SIGNATURE, endpoint_uris=BUNDLER_ENDPOINTS, flashbots_uri="https://relay-goerli.flashbots.net")

Migrating

Switching from the base Flashbots package to web3morebundlers is simple. This package initializes flashbot under the hood and exposes all existing w3.flashbot functions; only the initializer function needs to be changed (with an additional param).

Let's migrate flashbot's quickstart example:

from eth_account.signers.local import LocalAccount
from web3 import Web3, HTTPProvider
- from flashbots import flashbot
+ from web3morebundlers import bundler
from eth_account.account import Account
import os

ETH_ACCOUNT_SIGNATURE: LocalAccount = Account.from_key(os.environ.get("ETH_SIGNER_KEY"))
+ BUNDLER_ENDPOINTS = ["https://relay.flashbots.net", "https://rpc.titanbuilder.xyz", ...]

w3 = Web3(HTTPProvider("http://localhost:8545"))
- flashbot(w3, ETH_ACCOUNT_SIGNATURE)
+ bundler(w3=w3, signature_account=ETH_ACCOUNT_SIGNATURE, endpoint_uris=BUNDLER_ENDPOINTS)