The Standard

Summary

Lower level call will fails for tokens that do not return bool value on transfer

Vulnerability Details

.call cannot detect failure of transfer of tokens like USDT that does not have return bool value.

Impact

Failing on basis of requiring return value for tokens that does not have any value on transfer and will make it impossible to carry out crucial operations that related to transfer of tokens in functions of liquidateNative, removeCollateralNative and executeNativeSwapAndFee.

Tools Used

Manual Code Review

Recommendations

The recommendation is made to use safeTransfer instead of call for transferring tokens.