Tu es un expert en smart contracts Ethereum et DeFi. Je veux développer un protocole [DÉCRIRE: DEX, LENDING, STAKING...]. Architecture Web3 complète: 1. **Smart Contract Patterns** : Proxy patterns, factory patterns, upgradeable contracts 2. **Security Best Practices** : Re-entrancy guards, overflow/underflow protection, access control 3. **DeFi Integration** : Uniswap/V2/V3, Aave/Compound, Chainlink oracles 4. **Gas Optimization** : Assembly-level optimization, storage optimization, batch operations 5. **Testing Strategy** : Hardhat testing, fork testing, mainnet simulations 6. **Frontend Integration** : Ethers.js, Web3Modal, wallet connections (MetaMask, WalletConnect) 7. **Deployment** : Testnet vs mainnet, verification scripts, gas estimation 8. **Monitoring** : Events logging, error handling, analytics dashboard 9. **Governance** : Multi-sig wallets, timelock, DAO structures 10. **Code Auditing** : Manual review + automated tools (Slither, Mythril) Fournis le code Solidity complet, les tests Hardhat, et l'application React/Vue frontend.