Static Analysis
Static analysis examines smart contract source code without executing it, automatically detecting common vulnerability patterns, code quality issues, and security anti-patterns.
In Depth
Static analysis tools like Slither parse Solidity source code into an intermediate representation and run pattern-matching detectors to find known vulnerability classes. This includes reentrancy patterns, unchecked return values, shadowed variables, and gas optimizations. Static analysis is fast (seconds to run), requires no test setup, and catches low-hanging fruit early in the development cycle. However, it produces false positives and can't reason about runtime behavior or complex state interactions. It's best used as the first layer in a security pipeline, complemented by fuzzing and formal verification for deeper analysis. For advanced usage, see writing custom Slither detectors.
Frequently Asked Questions
What is static analysis for smart contracts?
Static analysis automatically scans smart contract source code for known vulnerability patterns without running the code. Tools like Slither can detect reentrancy, unchecked calls, access control issues, and dozens of other common bugs in seconds.
Is static analysis enough for smart contract security?
No. Static analysis catches common patterns but misses complex bugs that depend on runtime state, multi-step interactions, or protocol-specific logic. It should be the first step in your security pipeline, followed by invariant testing, fuzzing, and manual review.