What is a MEV-protected swap service?

It's a swap tool that uses pre-trade price checks, slippage limits, and private RPCs to block sandwich bots from front-running your trades.

How do I build MEV protection in TypeScript?

Grab viem, hit swapapi.dev for quotes, validate impact/slippage, submit via Flashbots Protect RPC – full guide above.

Does private RPC stop all Ethereum sandwich attacks?

Mostly, but pair with pre-validation; thin pools still slip, and not all bots are foiled.

📦 Open Source

Sandwich Bots Pilfered $289M Last Year – Build TypeScript Swaps That Punch Back

Every time you swap tokens on Ethereum, bots might be sandwiching you for profit. Here's how to code a TypeScript service that slams the door on those $289 million thieves.

theAIcatchup Apr 10, 2026 4 min read

TypeScript code building MEV-protected token swap service with validation functions

⚡ Key Takeaways

Sandwich bots stole $289M from swaps in 2025 – protect with pre-trade validation and private RPCs. 𝕏
Use swapapi.dev for quotes with built-in slippage and impact checks in TypeScript. 𝕏
Private submission like Flashbots isn't enough alone – history shows multi-layer defense wins. 𝕏

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theAIcatchup

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#Ethereum DeFi #Ethereum bots #Flashbots Protect #MEV protection #TypeScript swaps #private RPC #sandwich attacks

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Originally reported by dev.to

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