Pieces Protocol

Summary

The contract declares an error TokenDivier__InvalidAmount, but it is never used within the code. This results in unnecessary code bloat and potential confusion for developers and auditors reviewing the contract.

Vulnerability Details

The error TokenDivier__InvalidAmount is defined but not utilized anywhere in the contract. However, a suitable place to implement it could be in functions where token amounts are checked, such as:

• transferErcTokens: The contract currently checks if the amount is zero, but additional validation could be added to verify logical correctness.

  if (amount <= 0) {

  revert TokenDivier__InvalidAmount();

  }

• sellErc20: Similar checks could be implemented to ensure valid amounts are provided.

By using this error in relevant locations, the contract can improve error reporting and avoid confusion.

Impact

• Code Maintainability: Unused errors introduce unnecessary complexity and can mislead developers.

• Gas Efficiency: Keeping unused code may slightly increase contract deployment costs.

• Potential Logical Gaps: If the error was intended to be used, its absence might indicate a missing validation check.

Tools Used

• Manual code review

• Solidity static analysis tools

Recommendations

1. Remove Unused Error: If the error is not needed, remove it to clean up the code.
   *

   - error TokenDivier__InvalidAmount();

2. Implement Where Necessary: If amount validation is needed, apply the error in functions dealing with token transfers.

3. Code Review: Conduct a thorough review to check if any other unused code exists.