Security quizzes

Short, self-graded quizzes on real smart contract vulnerabilities. Test the reflex, see the explanation, learn the method.

Shadow Audits

Full audit debriefs from live sessions. The real findings, the false positives that trap good auditors, and the method that separates them.

Shadow Audit #1

ElasticSwap Audit Quiz

Ten questions from the ElasticSwap shadow audit debrief: the three real findings, the seven false positives that trap good auditors, and the method that separates a real finding from a reflex.

10 questions

Spot the Bug

One real vulnerability at a time. Catch it before the reveal. New ones drop with the daily ZLX-Check.

ZLX-Check

Spot the Bug: the empty-address trap

A call to an address with no code does not fail. It succeeds and does nothing. Three questions on the trap a zero-address check does not catch.

3 questions