Update

Author: HashLips

contract/SimpleNft.sol

@@ -98,15 +98,15 @@ contract NFT is ERC721Enumerable, Ownable {
   }
 
   //only owner
-  function reveal() public onlyOwner() {
+  function reveal() public onlyOwner {
       revealed = true;
   }
 
-  function setCost(uint256 _newCost) public onlyOwner() {
+  function setCost(uint256 _newCost) public onlyOwner {
     cost = _newCost;
   }
 
-  function setmaxMintAmount(uint256 _newmaxMintAmount) public onlyOwner() {
+  function setmaxMintAmount(uint256 _newmaxMintAmount) public onlyOwner {
     maxMintAmount = _newmaxMintAmount;
   }
 
@@ -130,4 +130,4 @@ contract NFT is ERC721Enumerable, Ownable {
     (bool success, ) = payable(msg.sender).call{value: address(this).balance}("");
     require(success);
   }
-}
+}