Checks-Effects-Interactions Pattern
The fundamental pattern for writing secure smart contracts. Learn how to structure your functions to prevent reentrancy.
Proven patterns and strategies for building secure smart contracts. From basic patterns to advanced deployment strategies.
Always follow the CEI pattern
Use ReentrancyGuard for sensitive functions
Check return values from external calls
Implement access control on admin functions
Use TWAP for price oracle data
Write comprehensive tests before deploy
Start with these foundational best practices
The fundamental pattern for writing secure smart contracts. Learn how to structure your functions to prevent reentrancy.
Best practices for role-based access control using OpenZeppelin AccessControl and custom solutions.
Complete checklist and guide for getting your smart contracts ready for a professional security audit.
Complete collection of security guides
How to implement upgradeable contracts safely using proxy patterns and avoiding storage collisions.
Best practices for integrating Chainlink and other oracles safely to prevent price manipulation attacks.
How to optimize gas costs while maintaining security. Common pitfalls to avoid.
Unit testing, integration testing, fuzzing, and formal verification strategies for bulletproof contracts.
How to build circuit breakers and pause functionality for emergency situations.
Understanding Solidity 0.8+ overflow protection and when you still need to be careful.
How to safely interact with external contracts and handle return values properly.
Use our comprehensive pre-deployment checklist to ensure your contracts are audit-ready.