TechFlow news: According to blockchain intelligence from SlowMist Security Team, when the LDO token contract processes transfer operations, if the transfer amount exceeds the user's actual balance, the transaction does not revert. Instead, it simply returns "false" as the result. This behavior differs from many common ERC20 standard token contracts.
Due to this characteristic, there exists a potential "fake deposit" risk. Malicious attackers may attempt to exploit this feature for fraudulent activities.
SlowMist recommends the following:
1. When handling token deposit logic, do not rely solely on whether a transaction succeeds or fails; also verify the actual return value from the token contract.
2. Note that many non-ERC20 standard token contracts exist in the market. Before integrating any new token, thoroughly understand and analyze its contract code to ensure correct deposit handling logic.
3. It is recommended to conduct regular code audits and security reviews to ensure system robustness and security.
Token contract implementations and behaviors can vary significantly across projects. To ensure fund safety and transaction accuracy, it is strongly advised to fully understand the contract logic and perform comprehensive testing before integrating any new token.
