Flashbots Transaction Sender

Sending flashbot bundles to python

This repository provides a Python script for sending transactions via Flashbots to bypass the public mempool and avoid frontrunning. The script utilizes Web3.py and the Flashbots API to submit bundles directly to miners

Features

Web3 Integration: Connects to Ethereum using an Infura RPC Flashbots Compatibility: Uses Flashbots for transaction bundling Dynamic Gas Adjustments: Adjusts gas fees automatically to increase transaction success rate Mempool Monitoring: Checks whether a transaction has been included Automated Retries: Increases gas fees progressively in case of failures

Installation

1. Clone the repository:

git clone https://github.com/pydevtop/sending-bundles-flashbots.git
cd sending-bundles-flashbots

Create a virtual environment venv:

python -m venv venv

Activate the environment:

c:\sending-bundles-flashbots\venv\Scripts\activate

Install dependencies:

pip install -r requirements.txt  

Configuration

Set your Ethereum RPC, private key, and recipient wallet in config.py or directly in the script:

RPC_URL = "https://mainnet.infura.io/v3/YOUR_INFURA_KEY"
PRIVATE_KEY = "YOUR_PRIVATE_KEY"
SEND_WALLET = "0xRecipientAddress"

Usage

Run the script to send transactions via Flashbots:

python main.py  

Result

Connected to Ethereum network: Geth/v1.14.13-stable-eb00f169/linux-amd64/go1.23.5
Account address: 0xC3f78F263c6862EFfE82C887DB6C872cb9A64E46
Base Fee: 565751357
Initial Priority Fee: 57704721
Max Fee Per Gas: 680031213
Sending bundle to block 7712502...
Bundle: [{'signed_transaction': HexBytes('0x02f87783aa36a782059083580ce884288873ed83061a80941255a27b98c04dd2ec429908e0d03351c6af9c8e88016345785d8a000080c080a0f8c2d6da5c68c478012c728f82288ad7d90991d60c0e837d251bf8e2c3e14f85a02d93ed1ae3c2bebc956b80484ce05fb8aaa68a98ce3180ffda174c04b0aad7f3')}]
Transaction sent via Flashbots to block 7712502, waiting...
Transaction confirmed in block 7712502.
TX Hash: 0x09f56bf472ba580a7231b2dcb5b87c8d529cd495b3af710c9e6673089fd8777e
Transaction 0x09f56bf472ba580a7231b2dcb5b87c8d529cd495b3af710c9e6673089fd8777e not in mempool. Retrying... (1/10)
Transaction 0x09f56bf472ba580a7231b2dcb5b87c8d529cd495b3af710c9e6673089fd8777e not in mempool. Retrying... (2/10)
Transaction 0x09f56bf472ba580a7231b2dcb5b87c8d529cd495b3af710c9e6673089fd8777e not in mempool. Retrying... (3/10)
Transaction 0x09f56bf472ba580a7231b2dcb5b87c8d529cd495b3af710c9e6673089fd8777e not in mempool. Retrying... (4/10)
Transaction 0x09f56bf472ba580a7231b2dcb5b87c8d529cd495b3af710c9e6673089fd8777e not in mempool. Retrying... (5/10)
Transaction 0x09f56bf472ba580a7231b2dcb5b87c8d529cd495b3af710c9e6673089fd8777e not in mempool. Retrying... (6/10)
Transaction 0x09f56bf472ba580a7231b2dcb5b87c8d529cd495b3af710c9e6673089fd8777e not in mempool. Retrying... (7/10)
Transaction 0x09f56bf472ba580a7231b2dcb5b87c8d529cd495b3af710c9e6673089fd8777e not in mempool. Retrying... (8/10)
Transaction 0x09f56bf472ba580a7231b2dcb5b87c8d529cd495b3af710c9e6673089fd8777e not in mempool. Retrying... (9/10)
Transaction 0x09f56bf472ba580a7231b2dcb5b87c8d529cd495b3af710c9e6673089fd8777e not in mempool. Retrying... (10/10)
Transaction 0x09f56bf472ba580a7231b2dcb5b87c8d529cd495b3af710c9e6673089fd8777e is still missing. Increasing gas fees...
New Max Fee Per Gas: 1020046819, New Priority Fee: 63475193
Sending bundle to block 7712504...
Bundle: [{'signed_transaction': HexBytes('0x02f87783aa36a782059083580ce8843cccade383061a80941255a27b98c04dd2ec429908e0d03351c6af9c8e88016345785d8a000080c080a06eaff177a699ebdcc2c9b6ce1daeea37e8dc32e99bd39f929abdbb37d7d1fc29a07e5bfc3785636e6f54f39492a7238a97dbfe8d8085edd94828b7a6084bd0cb0a')}]
Transaction sent via Flashbots to block 7712504, waiting...
Transaction confirmed in block 7712504.
TX Hash: 0x64cd7616bd0447b8f20a6c6e1b75cb400ea4603ed269c8acf879ba58f2165faa
Transaction 0x64cd7616bd0447b8f20a6c6e1b75cb400ea4603ed269c8acf879ba58f2165faa not in mempool. Retrying... (1/10)
Transaction 0x64cd7616bd0447b8f20a6c6e1b75cb400ea4603ed269c8acf879ba58f2165faa not in mempool. Retrying... (2/10)
Transaction 0x64cd7616bd0447b8f20a6c6e1b75cb400ea4603ed269c8acf879ba58f2165faa not in mempool. Retrying... (3/10)
Transaction 0x64cd7616bd0447b8f20a6c6e1b75cb400ea4603ed269c8acf879ba58f2165faa not in mempool. Retrying... (4/10)
Transaction 0x64cd7616bd0447b8f20a6c6e1b75cb400ea4603ed269c8acf879ba58f2165faa not in mempool. Retrying... (5/10)
Transaction 0x64cd7616bd0447b8f20a6c6e1b75cb400ea4603ed269c8acf879ba58f2165faa not in mempool. Retrying... (6/10)
Transaction 0x64cd7616bd0447b8f20a6c6e1b75cb400ea4603ed269c8acf879ba58f2165faa not in mempool. Retrying... (7/10)
Transaction 0x64cd7616bd0447b8f20a6c6e1b75cb400ea4603ed269c8acf879ba58f2165faa not in mempool. Retrying... (8/10)
Transaction 0x64cd7616bd0447b8f20a6c6e1b75cb400ea4603ed269c8acf879ba58f2165faa not in mempool. Retrying... (9/10)
Transaction 0x64cd7616bd0447b8f20a6c6e1b75cb400ea4603ed269c8acf879ba58f2165faa not in mempool. Retrying... (10/10)
Transaction 0x64cd7616bd0447b8f20a6c6e1b75cb400ea4603ed269c8acf879ba58f2165faa is still missing. Increasing gas fees...
New Max Fee Per Gas: 1530070228, New Priority Fee: 69245665
Sending bundle to block 7712507...
Bundle: [{'signed_transaction': HexBytes('0x02f87783aa36a782059083580ce8845b3304d483061a80941255a27b98c04dd2ec429908e0d03351c6af9c8e88016345785d8a000080c001a03847b85bf9004ee7a819b303b7af99fb72488ce7dffa006e02dcdf9f836eb6f1a005a603426f05ed8f7c2fb4e4e61065d01ee8f3fe5addb2c882be4db15d40c89f')}]
Transaction sent via Flashbots to block 7712507, waiting...
Transaction confirmed in block 7712507.
TX Hash: 0xa34e58b5fd9207a6ff7d40fd2d8af61f1b74dc35b9ff212fee6cb02aac96e5a0
Transaction 0xa34e58b5fd9207a6ff7d40fd2d8af61f1b74dc35b9ff212fee6cb02aac96e5a0 is in mempool!  

Dependencies:

web3

eth-account

flashbots

License MIT

Contacts

Telegram: @morgan_sql
Telegram channel: https://t.me/pydevtop