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MEV Protection Strategies for DeFi Protocols

Comprehensive guide to protecting DeFi protocols and users from Maximal Extractable Value attacks.

ExVul Research Team

Security Researchers

11 min
  • MEV
  • Front-running
  • DeFi Security
MEV Protection Strategies for DeFi Protocols

What is MEV?

Maximal Extractable Value (MEV) refers to the profit that can be extracted by reordering, inserting, or censoring transactions within a block.

Common MEV Attacks

  • Front-running: Inserting transactions before profitable trades
  • Back-running: Following profitable transactions
  • Sandwich attacks: Surrounding victim transactions
  • Liquidation sniping: Racing to liquidate positions

Protection Strategies

mev-protection.sol
// Commit-reveal scheme for MEV protection
mapping(bytes32 => uint256) public commits;
function commit(bytes32 hash) external {
commits[hash] = block.number;
}
function reveal(uint256 amount, bytes32 secret) external {
bytes32 hash = keccak256(abi.encode(msg.sender, amount, secret));
require(commits[hash] != 0, "No commit");
require(block.number > commits[hash] + 1, "Too early");
// Execute protected action
}
Private Mempools

Use Flashbots or similar services

Commit-Reveal

Hide transaction details until execution

Slippage Protection

Set appropriate slippage tolerances