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⚡ Flashbots: Private Transaction Pool

Learn how Flashbots prevents public mempool front-running

Understand MEV and transaction ordering exploits

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Flashbots: The MEV Solution

**Flashbots** is a research and development organization working to mitigate the negative externalities of MEV. Their primary tool, **Flashbots Protect**, provides a private transaction pool that bypasses the public mempool entirely.

By submitting transactions through Flashbots, users can avoid front-running attacks while still benefiting from efficient block construction through MEV-Boost.

How Flashbots Works

1
Private Submission
Users submit transactions directly to Flashbots relay (not public mempool)
2
Bundle Creation
Searchers create transaction bundles with specific ordering requirements
3
Block Building
Flashbots relay constructs optimal blocks with private transactions
4
MEV-Share Revenue
Extracted MEV can be shared with users instead of pure profit for searchers

Interactive: Bundle Priority Simulator

Adjust bundle parameters to see how priority changes in Flashbots block construction.

1 tx10 txs
Bundle Size
3 txs
Mining Priority
0.0%
Front-run Risk
0%

✅ Flashbots Benefits

  • • No mempool exposure = no front-running
  • • Failed transactions don't cost gas
  • • MEV-Share revenue redistribution
  • • Free to use (no extra fees)

⚠️ Tradeoffs

  • • Requires trust in Flashbots relay
  • • May have longer confirmation times
  • • Not all validators use MEV-Boost
  • • Centralization concerns

Using Flashbots Protect

// Add Flashbots Protect RPC to wallet
Network: Ethereum Mainnet
RPC URL: https://rpc.flashbots.net
Chain ID: 1

// Or use in code
const provider = new JsonRpcProvider(
  'https://rpc.flashbots.net'
)

// Transactions automatically protected
await contract.swap(amountIn, amountOutMin)

That's it! No code changes needed. Just switch your RPC endpoint and all transactions go through Flashbots private mempool.

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