Piedao: Logical flaws in the donations and liquidation of Euler Finance led to the attack

According to ChainCatcher's message and analysis by PeckShield, Euler Finance was exploited in a series of transactions on Ethereum due to logical flaws in its donation and liquidation processes (hacker transaction address), resulting in a loss of approximately $197 million for the project. Specifically, donateToReserves needs to ensure that donors are still over-collateralized, and liquidation needs to ensure the "correct" conversion rate from borrowed to collateralized assets, as illustrated in the diagram. Additionally, there were two hackers involved in the attack: 0x5F2…8B8c and 0xBcA…7c5C. (source link)