Recently, the Aave protocol experienced a highly publicized transaction involving a swap of $50 million worth of USDT for AAVE tokens. What made this event unique was that the transaction wasn't executed directly within the core Aave protocol but rather through a frontend component that integrated the CoW Swap solution. CoW Swap's solvers are responsible for routing user trade requests to various decentralized exchanges to seek optimal execution.
However, in this incident, the trade size far exceeded the available liquidity for the token pair, causing the price quoted by the solver to be significantly lower than market expectations, with a drop of up to 99.9%. Aave stated that its frontend interface clearly displayed warnings about extreme price impact to the user before the transaction was executed.
The user involved in the transaction confirmed the high-risk quote with full knowledge. The platform only enabled the 'Swap' button after the user explicitly checked a box to agree to the risk disclosure. It is understood that this operation ultimately purchased approximately 331 AAVE tokens, which were then deposited into Aave V3 to generate aEthAAVE. The user ultimately received aEthAAVE valued at approximately $36,425.
In response to this incident, the Aave team plans to introduce a new security feature called "Aave Shield." This feature will automatically block swaps where the price impact exceeds 25%, requiring users to manually disable this protection mechanism to execute higher-risk trades. This move aims to increase friction for trades while preserving the option for users to conduct permissionless transactions. Aave has indicated that it has not yet received proactive contact from the user involved in this incident.