Building a smart contracts fuzzer for fun and profit

The article discusses the importance of security in Web3 and how smart contracts are vulnerable to attacks due to their open-source and public nature.

The author suggests that unit testing is not enough to ensure security and instead proposes the use of property-based testing or "fuzzing" to generate thousands or millions of tests to improve confidence in code security.

The author also explains the difference between formal methods and fuzzing and how they can be complementary.

The article introduces the "Fuzzing Like A Smarter Degen" software for detecting vulnerabilities in smart contract code using the Hypothesis Python library. The software uses invariant-based testing and coverage guidance to generate random tests and check if invariants hold true.