A backrunning bot is an arbitrage tool used in decentralized finance (DeFi) to profit from price imbalances caused by large trades on decentralized exchanges (DEXs). The bot identifies large trades, calculates profitable arbitrage routes, and executes transactions to restore market balance.
Steps to Build the MEV Bot
Identify Trades to Backrun:
Monitor the mempool for large transactions that might disrupt market prices.
Use lookup tables to analyze transactions and detect imbalances.
Find Profitable Arbitrage Routes:
Evaluate 2-hop and 3-hop trading routes to identify the most profitable paths.
Use tools like the Jupiter SDK and real-time pool data to calculate potential profits.
Execute Arbitrage Transactions:
Borrow funds using flashloans from Solend.
Perform the arbitrage route using multi-hop swaps.
Repay the flashloan and tip the validator.
How to Run the Bot:
Requirements:
API keypair for the block engine.
A running RPC without rate limits.
A wallet with some SOL.
A multicore Linux machine with at least 16GB RAM.
Setup:
Configure environment variables in a .env file.
Install dependencies and start the bot using:
yarn install
yarn start
Alternatively, use Docker for deployment.
Conclusion
An MEV bot like this can capitalize on arbitrage opportunities in the Solana blockchain. While the setup requires technical knowledge and the right infrastructure, it offers significant potential for profit. By following these steps, you can build a functional and efficient backrunning bot tailored for Solana.