Summary

Lack of Duplicate ID Check in combineShorts Function".

Vulnerability Details

The contract does not validate if the provided IDs array in the combineShorts function contains unique IDs.

Impact

The impact of not checking for duplicate IDs in the combineShorts function could potentially be significant. If duplicate IDs are provided, the same short record could be processed multiple times, leading to incorrect calculations and potentially causing the state of the contract to be updated incorrectly. This could lead to loss of funds or other unexpected behavior.

Tools Used

Manual

Recommendations

To resolve this issue, you should add a check to ensure that the IDs provided in the array are unique. This can be done by using a mapping to track the IDs that have already been processed. If an ID is found more than once, the function should revert. Here is a sample code snippet:

This will ensure that each ID is only processed once, preventing potential issues caused by duplicate IDs.