How I Added MEV Protection to a Telegram Trading Bot on Solana

If you're building anything that submits transactions on Solana — especially swaps — you need to think about MEV. Maximal Extractable Value is the profit that searchers and validators can extract by reordering, inserting, or censoring transactions in a block. On Solana, the most common MEV attack is the sandwich: a bot sees your pending swap, buys the token before you (pushing the price up), lets your trade execute at the worse price, then sells immediately after. You lose, they profit. I run a Telegram trading bot for Solana (@solscanitbot) that processes hundreds of swaps. Without MEV protection, my users were getting consistently worse fills than they should have. Here's how I fixed it. The Problem When you submit a transaction to a regular Solana RPC endpoint, it enters the public mempool. Searcher bots monitor this mempool and can front-run your trades in milliseconds. The typical flow without protection: User wants to buy token X for 1 SOL Bot creates Jupiter swap transaction Bot