The DFX Finance project on the ETH chain was attacked, and the attackers made a profit of about $231,138. According to SlowMist analysis, the main reason for this attack is that the Curve contract flash loan function does not have re-entrancy protection, which causes the attack to re-enter the deposit function to transfer tokens to judge the balance of flash loan repayments. The account so that the attacker can successfully withdraw money to profit.