First Flight #21: KittyFi

First Flight #21
Beginner FriendlyDeFiFoundry
100 EXP
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Submission Details
Severity: low
Invalid

MISSING EVENT HANDLER

Summary

In the KityVault.sol contract some of the functions do not emit events after the progress. Events are a method of informing the transaction initiator about the actions taken by the called function. It logs its
emitted parameters in a specific log history, which can be accessed outside of the contract using some filter parameters

Vulnerability Details

The contract lacks events for key actions, including deposits, withdrawals, and interactions with Aave. Without these events, it becomes challenging to track and monitor important actions on the blockchain.

Events Should Be Added (Examples)

event CollateralDeposited(address indexed user, uint256 amount, uint256 cattyNipGenerated);
event CollateralWithdrawn(address indexed user, uint256 amount, uint256 cattyNipWithdrawn);
event CollateralSuppliedToAave(uint256 amount);
event CollateralWithdrawnFromAave(uint256 amount);

Impact

The absence of events in the KittyVault contract can significantly impact its usability and maintainability. Events are crucial for logging important actions and state changes, providing transparency and traceability for users and developers. Without events:

  1. Monitoring Difficulties:
    Users and external monitoring tools will have difficulty tracking contract activities. This can make it challenging to verify transactions, audit operations, and troubleshoot issues.

  2. Debugging Challenges:
    In the absence of events, debugging and identifying the cause of unexpected behavior or errors becomes more complex. Events provide critical data points that help in diagnosing issues.

  3. Increased Risk of Fraud or Misuse:
    Without events, fraudulent or malicious activities may go unnoticed. Events help in detecting unusual patterns or unauthorized actions.

  4. Reduced Transparency:
    Events provide a clear and verifiable log of interactions with the contract. Missing events reduce the transparency of contract operations, affecting trust and confidence among users and stakeholders.

Recommendations

Consider as much as possible declaring events at the end of the function. Events can be used to detect the end of the operation.

Updates

Lead Judging Commences

shikhar229169 Lead Judge about 1 year ago
Submission Judgement Published
Invalidated
Reason: Non-acceptable severity

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