High-Intensity Cybersecurity & Offensive Depths
Smart Contract Auditing for Web3
Smart contracts are immutable once deployed, so a single bug can drain funds with no rollback. Auditing focuses on reentrancy, access control, integer and decimal handling, oracle manipulation, and economic logic that static tools miss. Good audits combine automated analysis with manual review of invariants and threat modeling of how value moves through the system.
Points clés
- Run Slither, Mythril, and Foundry fuzzing early in development, not only before deployment.
- Define and test invariants such as total supply conservation and solvency across actions.
- Review access control on every state-changing function, including admin and upgrade paths.
- Check reentrancy on all external calls and use checks-effects-interactions ordering.
- Validate oracle usage for staleness, manipulation, and decimal mismatches.
- Audit upgradeability mechanisms and timelocks for governance capture risks.
- Test with mainnet forking to reproduce real liquidity and price conditions.
- Publish a bug bounty and monitor deployed contracts for anomalous transactions.
Questions fréquentes
Is an automated scan enough?
No, automation catches known patterns but misses economic and logic flaws that manual review finds.
Can a deployed contract be fixed?
Only if it was designed as upgradeable, which itself introduces governance risk.
What is the most common critical bug?
Reentrancy and access control mistakes, followed by oracle and decimal handling errors.
How long should an audit take?
It depends on complexity, but rushing a high-value contract is the most expensive shortcut in Web3.
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