ERC20.approve can be error prone. It is known issue. ERC20.sol could not be safe.

Lines of code Vulnerability details Impact ERC20 - approve is not safe. Proof of Concept For approve, the entire contract depend on ERC20.approve assetContract.approveswapperAddress, borrowAmount; collateralContract.approveswapperAddress, collateralToSwap; Refer following articles for this issue...