A crypto user has lost millions during a crypto swap on the decentralized finance protocol Aave, with a Maximal Extractable Value, or MEV, bot also front-running the transaction to make almost $10 million.

A recently funded wallet from Binance containing $50.4 million USDt (USDT) executed a swap via decentralized exchange aggregator CoW Protocol and the SushiSwap DEX on Thursday, aiming to convert the full amount into the Aave (AAVE) token.

However, the wallet only received 327 AAVE tokens valued at approximately $36,000, according to Etherscan.

The result was an almost total loss as the user paid around $154,000 per AAVE, compared to its market price of around $114.

Adding to the loss was a MEV bot that did a “sandwich attack” on the…