Puppy Raffle
AI First Flight #1
Beginner FriendlyFoundrySolidityNFT
EXP
View results
Previous Next
Submission Details
Impact: low
Likelihood: low
Invalid

Dead Code: Unused _isActivePlayer Function

dod4ufn

Root + Impact

The _isActivePlayer internal function is defined but never called anywhere in the contract, representing dead code that increases contract size and reduces code clarity. This is a code quality issue that suggests incomplete refactoring or abandoned development effort.

Description

  • The normal behavior is for all defined functions to serve a purpose and be utilized within the contract logic to accomplish the intended protocol functionality.

  • The issue is that _isActivePlayer is defined with proper documentation but is never invoked by any function in the contract, including internal functions and external entry points. This suggests the function was either planned for future use, leftover from refactoring, or replaced by other mechanisms (like the mapping-based duplicate checks).

// Root cause in the codebase with @> marks to highlight the relevant section
@> /// @notice this function will return true if the msg.sender is an active player
@> function _isActivePlayer() internal view returns (bool) {
@> for (uint256 i = 0; i < players.length; i++) {
@> if (players[i] == msg.sender) {
@> return true;
@> }
@> }
@> return false;
@> }

Risk

Likelihood:

  • This is definitively dead code—static analysis confirms the function is never called by any other contract function

  • The function has been part of the contract since deployment and remains unused

Impact:

  • Contract Size: Increases compiled bytecode size by approximately 100-150 bytes, slightly increasing deployment gas costs

  • Code Clarity: Dead code confuses auditors, developers, and future maintainers who must determine if it serves a hidden purpose

  • Maintenance Burden: Future developers may waste time analyzing this function to understand its intended role

  • Security Review Overhead: Security auditors must spend extra effort verifying that unused code poses no risk

  • Architecture Signal: Indicates incomplete refactoring or abandoned design patterns, reducing confidence in code quality

Proof of Concept

// _isActivePlayer is never called in:
// - enterRaffle()
// - refund()
// - selectWinner()
// - withdrawFees()
// - changeFeeAddress()
// - Any other function

Recommended Mitigation

- /// @notice this function will return true if the msg.sender is an active player
- function _isActivePlayer() internal view returns (bool) {
- for (uint256 i = 0; i < players.length; i++) {
- if (players[i] == msg.sender) {
- return true;
- }
- }
- return false;
- }
Updates

Lead Judging Commences

ai-first-flight-judge Lead Judge about 8 hours ago
Submission Judgement Published
Invalidated
Reason: Incorrect statement

Support

FAQs

Can't find an answer? Chat with us on Discord, Twitter or Linkedin.

Give us feedback!