Best practices for smart contract auditing
I've been doing audits for a few months now and wanted to share some insights and also learn from the community.
Tools I've found helpful:
- Slither for static analysis
- Foundry for testing and fuzzing
- Echidna for property-based testing
My process:
1. Initial code review for obvious issues
2. Run automated tools
3. Manual review focusing on business logic
4. Write comprehensive report
What tools and methodologies do you all prefer? I'm especially curious about how experienced auditors approach complex DeFi protocols.
3 Comments
Great overview! I'd add Mythril to your toolkit - it's excellent for detecting common vulnerabilities. For DeFi specifically, I always check for flash loan attack vectors first.
Thanks Bob! I've heard of Mythril but haven't used it much. Any specific settings you recommend for DeFi audits?
I usually run it with --execution-timeout 300 for complex contracts. Also combine it with manual analysis - automated tools miss context-specific issues.
Don't forget about formal verification for critical components! Certora is great for this, though it has a learning curve. Also, always check the token integration - non-standard ERC20s cause a lot of issues.
For business logic review, I create a state machine diagram first. Helps visualize all possible transitions and find edge cases. Happy to share my template if anyone's interested.