Trick or Treat

Description:

Events are defined without indexed parameters, which are crucial for efficient event filtering and querying off-chain.

Instances:

1. TreatAdded Event (Line 25):

   event TreatAdded(string name, uint256 cost, string metadataURI);

2. Swapped Event (Line 26):

   event Swapped(address indexed user, string treatName, uint256 tokenId);

3. FeeWithdrawn Event (Line 27):

   event FeeWithdrawn(address owner, uint256 amount);

Impact:

• Inefficient Event Filtering:

  • Without indexed parameters, it's more challenging to search and filter events based on specific criteria, which can hinder data retrieval and analysis.

• Developer and User Inconvenience:

  • Off-chain applications and users may find it difficult to track events related to specific treats, token IDs, or owners.

Recommendation:

• Add Indexed Parameters to Events:

  • Modify events to include indexed keywords for relevant fields.

  • Updated TreatAdded Event:

    event TreatAdded(string indexed name, uint256 cost, string metadataURI);

  • Updated Swapped Event:

    event Swapped(address indexed user, string indexed treatName, uint256 tokenId);

  • Updated FeeWithdrawn Event:

    event FeeWithdrawn(address indexed owner, uint256 amount);

• Limit Indexing to Essential Fields:

  • Remember that a maximum of three parameters can be indexed per event. Choose the most critical fields for indexing.