De-Risking EVM Smart Contracts: A 5-Point Security Audit Checklist

### Why Web3 Engineering Demands Zero Tolerances

Unlike Web2 applications where a broken endpoint can be patched with a quick hotfix, smart contract deployments are immutable. A single reentrancy bug or unchecked arithmetic error can result in total liquidity depletion.

### The 5-Point Pre-Deployment Verification: 1. **Checks-Effects-Interactions Pattern:** Always update internal state variables before making external calls or ether transfers. 2. **ReentrancyGuard Modifiers:** Enforce nonReentrant execution on all state-mutating functions. 3. **Automated Static Security Analysis:** Running Slither and Mythril to catch unchecked return values and access control oversights. 4. **Fuzzing & Invariant Testing with Foundry:** Testing edge cases with hundreds of thousands of pseudorandom inputs. 5. **Multi-Sig Governance & Timelocks:** Ensuring administrative upgrades require multi-party cryptographic authorization.