Summary

Lack of Precision Check in increaseCollateral and decreaseCollateral Functions

Vulnerability Details

The contract fails to verify whether the specified amount in the increaseCollateral and decreaseCollateral functions aligns with the precision limits of the underlying asset. This oversight may result in rounding discrepancies during the conversion of the amount to the asset's smallest unit for storage or computations.

Impact

It could potentially impact the accuracy of the contract's state and the balances of the users.

Tools Used

Manual

Recommendations

To resolve this issue, you should add a precision check in the increaseCollateral and decreaseCollateral functions. This check should ensure that the specified amount aligns with the precision limits of the underlying asset.

Here is a sample implementation:

In this example, 1e18 is used as the precision for Ether. If the underlying asset has a different precision, you should replace 1e18 with the appropriate value. This will ensure that the amount is always a multiple of the smallest unit of the asset, preventing any rounding discrepancies.