DatingDapp
First Flight #33
Beginner FriendlyFoundrySolidityNFT
100 EXP
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Submission Details
Severity: low
Invalid

Inability to Remove Matches/Unlike Users

rare__one

Summary

The contract LikeRegistry.sol lacks functions to:

  • Remove entries from the matches array.

  • Reset likes to false (unlike a user).

Proof of Concept

  1. Alice likes Bob, but Bob deletes his profile.

  2. Alice’s matches array still includes Bob’s address, which points to a nonexistent profile.

Impact

  • Stale data accumulates in matches, bloating storage.

  • Users cannot undo accidental likes, harming UX.

  • Matched users remain linked even after burning profiles.

Tools Used

manual review

Recommendations

Add an unmatch function and track matches via mappings

mapping(address => mapping(address => bool)) public isMatched;
​
function unmatch(address user) external {
delete isMatched[msg.sender][user];
}
Updates

Appeal created

n0kto Lead Judge 4 months ago
Submission Judgement Published
Invalidated
Reason: Non-acceptable severity
Assigned finding tags:

Informational or Gas

Please read the CodeHawks documentation to know which submissions are valid. If you disagree, provide a coded PoC and explain the real likelyhood and the detailed impact on the mainnet without any supposition (if, it could, etc) to prove your point.

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