Chapter 5 of 10 · Web3 Security 50%

⚡ Euler Finance: $197M borrowed and gone in one transaction

March 2023, Euler Finance. An attacker borrowed unsecured liquidity, called donateToReserves on themselves, and walked out with $197M before the block closed. Learn the atomic exploit pattern before your audit hits one. 💸

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Web3 Security

⚡ Euler Finance: $197M borrowed and gone in one transaction

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Blockchain basics

Solidity security

Reentrancy attacks

Access control flaws

Flash loan attacks

Oracle manipulation

Analysis tools

DeFi attacks

Bridge security

Contract auditing