Blockchain

This course is a deep dive into how smart contracts actually fail in production and how professional auditors go about finding those failures before they cost anyone anything. Rather than teaching exploitation for its own sake, it builds a mental model of the major vulnerability classes, reentrancy, arithmetic bugs, access control gaps, and oracle manipulation, and pairs each one with the specific defensive pattern that neutralizes it. The back half of the course steps back from individual bugs to look at the audit process itself: what a manual review actually involves, where automated tools and formal verification fit, and why an audit is a risk-reduction exercise with real limits rather than a guarantee. By the end, you should be able to read a contract the way an auditor does, spot the shapes of these vulnerability classes, and understand why 'audited' is a claim about a moment in time, not a permanent property of the code.