BlockchainAdvanced#On-chain#Tech
MEV (Maximal Extractable Value)
M
Definition
The profit that can be gained by users (searchers/validators) by including, excluding, or reordering transactions in a block.
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Concept Diagram
Key Takeaways
1
MEV is the 'invisible tax' of on-chain trading — profit extracted by reordering or front-running your transactions.
2
Sandwich attacks are the most common MEV: a bot buys before you and sells after, forcing you to pay more.
3
Using MEV protection RPCs or private transaction broadcasting can shield your trades from being exploited.
4
Validators and sophisticated bots have an inherent advantage over standard users in the mempool.
Practical Example
You submit a swap on Uniswap: 1 ETH → USDC. A sandwich bot detects your pending tx, buys ETH before you (pushing price up), then sells immediately after your trade executes. You receive fewer USDC than expected — the difference is MEV captured by the bot.
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Related Terms
Blockchain
Flash LoansUncollateralized loans that must be borrowed and repaid within the same blockchain transaction, often used for arbitrage.
Blockchain
SequencerA node in a Rollup (L2) responsible for ordering transactions before they are batched and sent to the L1 (Ethereum).
Blockchain
Proposer-Builder Separation (PBS)A design where the task of proposing a block is separated from the task of building it, aimed at mitigating MEV centralization.
AI
Latency-Optimized AIDeployment of AI agents on hardware close to blockchain nodes to minimize the time between seeing data and executing a trade.
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