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How to Build a MEV-Protected Swap Service in...
Sandwich bots extracted $289 million from Ethereum swaps in 2025 alone, accounting for over 51% of all MEV activity on the network (ScienceDirect, 2025). Every unprotected swap is a potential victim. If you are building a swap service, wallet, or trading bot, MEV protection is not optional. This guide walks you through building a MEV-protected token swap service in TypeScript. You will learn what MEV is, how sandwich attacks work, and how to use pre-trade validation, slippage enforcement, and pr
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