If _totalCollateral and _collValidationBuffer are large enough, their multiplication could overflow before the division by BPS, resulting in an incorrect expectedCollateral value. This could cause the function to return invalid post-check parameters.
Look at the _getPostCheckParams function:
Looking at the order of operations, if _totalCollateral and _collValidationBuffer are large enough, their multiplication could exceed the maximum value represented by uint256, causing an overflow. This overflow would occur before the division by BPS, leading to an incorrect expectedCollateral value.
To prevent the potential overflow, divide _collValidationBuffer by BPS before multiplying it with _totalCollateral.
