Trick or Treat

Description:

Functions that are not called internally within the contract can be marked as external to optimize gas usage.

Instances:

1. setTreatCost Function (Line 43):

   function setTreatCost(string memory _treatName, uint256 _cost) public onlyOwner {

2. trickOrTreat Function (Line 48):

   function trickOrTreat(string memory _treatName) public payable nonReentrant {

3. resolveTrick Function (Line 118):

   function resolveTrick(uint256 tokenId) public payable nonReentrant {

4. withdrawFees Function (Line 146):

   function withdrawFees() public onlyOwner {

5. getTreats Function (Line 152):

   function getTreats() public view returns (string[] memory) {

6. changeOwner Function (Line 156):

   function changeOwner(address _newOwner) public onlyOwner {

Impact:

• Gas Efficiency:

  • Declaring functions as external can reduce gas consumption when the functions are called externally.

  • The Solidity compiler optimizes external function calls by avoiding unnecessary copying of arguments to memory.

Recommendation:

• Update Function Visibility:

  • Change the visibility of functions not used internally from public to external.

    function setTreatCost(string memory _treatName, uint256 _cost) external onlyOwner {

• Ensure No Internal Calls:

  • Verify that the functions are not called from within the contract before changing their visibility.