Sparkn

Summary

Total Percentage Calculation Vulnerability in Distributor Contract

Vulnerability Details

The vulnerability relates to the logic of summing up the percentages in the _distribute function of the Distributor contract. The contract assumes that the sum of percentages should be exactly (10000 - COMMISSION_FEE). Any rounding errors or inaccuracies in calculating the sum could result in an incorrect distribution or failed validation.

Impact

If the sum of the percentages deviates from the expected value, it could lead to incorrect token distribution or a failed distribution altogether. Inaccurate calculations may result in loss of funds or unexpected behavior in the contract.

Tools Used

Manual code review and analysis of the percentage calculation and validation logic in the _distribute function.

Recommendations

To address this vulnerability, consider the following recommendations:

1. Use SafeMath: Implement the use of SafeMath or similar libraries to handle arithmetic operations securely. This can help prevent rounding errors and ensure accurate calculations.

2. Allow Tolerance: Instead of expecting an exact sum of (10000 - COMMISSION_FEE), allow for a small tolerance to account for potential rounding issues. Use a range or margin of error when validating the total percentage.

3. Thorough Testing: Perform comprehensive testing with different percentage values to ensure that the distribution calculations produce accurate results and meet the desired criteria.