Smart Contract Security and Auditing

About this course

Smart contract bugs cost DeFi protocols hundreds of millions every year — and most of them are patterns an auditor is trained to catch before mainnet. This hands-on course takes you from Solidity developer to working auditor.

You’ll start by building the auditor’s mindset: how to threat-model a contract before you read a single line, and how to set up a real toolkit with Foundry, Slither and Mythril. From there you’ll go deep on the vulnerability classes that actually show up in post-mortems — reentrancy, access control flaws, unsafe math and precision loss, and oracle/flash-loan manipulation — each with a live exploit you reproduce yourself.

Next comes the auditor’s actual workflow: running automated static and dynamic analysis, writing Foundry fuzz and invariant tests that find bugs humans miss, and doing a disciplined manual line-by-line review with a repeatable checklist instead of guesswork.

The course closes with the part most tutorials skip: turning findings into a professional deliverable. You’ll learn an industry-standard severity/likelihood risk matrix, how to write remediation guidance a dev team can act on, and how to structure a full audit report. The capstone is a complete audit of a sample DeFi protocol — proof-of-concept exploits, severity ratings and report included — so you finish with a portfolio piece, not just notes.

By the end you’ll be able to vet a contract before launch, speak the language of professional audit firms, and produce a report worth charging for. Includes a certificate of completion.