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Reentrancy vulnerabilities.md

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13 - Reentrancy vulnerabilities

Untrusted external contract calls could callback leading to unexpected results such as multiple withdrawals or out-of-order events. Use check-effects-interactions pattern or reentrancy guards. (see here)

Slide Screenshot

013.jpg

Slide Text

  • External Contract Calls -> Reentrancy
  • Contract Callbacks
    • C1 -> C2 -> C1
  • Multiple Withdrawals -> 000 Events
  • CEI Patterns
  • Reentrancy Guards

References

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