Liquidity Management

Summary

In GmxProxy.sol, the condition require(msg.sender == perpVault, "invalid caller"); is used multiple times. Instead of repeating this line of code, a modifier can be introduced to enhance code reusability, readability, and maintainability.

Vulnerability Details

The repeated use of require(msg.sender == perpVault, "invalid caller"); across multiple functions violates the DRY (Don't Repeat Yourself) principle, making the contract harder to maintain and increasing the likelihood of inconsistencies.

Impact

• Code Maintainability: Any change to this validation must be manually updated across multiple occurrences, increasing the chance of errors.

• Readability: The contract becomes less readable due to redundant checks.

• Gas Optimization: Consolidating repeated code into a modifier can slightly optimize gas usage by reducing redundant bytecode.

Tools Used

• Manual Code Review

• Solidity Static Analysis Tools

Recommendations

Solution: Implementing a Modifier

To address this issue, a modifier should be created to enforce this condition consistently across all relevant functions.

Suggested Code Refactor

Applying the Modifier

Instead of writing the require statement repeatedly, apply the onlyPerpVault modifier to functions that require this check: