Buy nft problem, caller is not token owner nor approved

Moralis General
#1

hello, I am creating my first nft project and in this project I will sell with metamask from my own web page, but there is an error I get every time, only the contract owner can transact, different wallets cannot transact and I could not solve this problem.

nfterror
nfterror1739×142 18.7 KB

// SPDX-License-Identifier: GPL-3.0
pragma solidity >= 0.7.0 < 0.8.7;

import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

contract NFT is ERC721Enumerable, Ownable {
  using Strings for uint256;

    string public baseURI;
    string public baseExtension = ".json";
    string public notRevealedUri; 
    uint256 public cost = 0.01 ether;
    uint256 public maxSupply = 10000;
    uint256 public maxMintAmount = 20;
    uint256 public nftPerAddressLimit = 3;
    bool public paused = false;
    bool public onlyWhiteListed = true;
    address[] public whitelistedAddresses;

  constructor(
    string memory _name,
    string memory _symbol,
    string memory _initBaseURI
  ) ERC721(_name, _symbol) {
    setBaseURI(_initBaseURI);
  }

  // internal
  function _baseURI() internal view virtual override returns (string memory) {
    return baseURI;
  }

  // public
  function mint(uint256 _mintAmount) public payable {
    require(!paused);
    uint256 supply = totalSupply();
    require(!paused);
    require(_mintAmount > 0);
    require(_mintAmount <= maxMintAmount);
    require(supply + _mintAmount <= maxSupply);

    if (msg.sender != owner()) {
        if(onlyWhiteListed == true) {
            require(isWhitelisted(msg.sender), "user not whitelisted");
            uint256 ownerTokenCount = balanceOf(msg.sender); 
            require(ownerTokenCount < nftPerAddressLimit);
        }
        require(msg.value >= cost * _mintAmount);
    }

    for (uint256 i = 1; i <= _mintAmount; i++) {
      _safeMint(msg.sender, supply + i);
    }
  }
    function isWhitelisted(address _user) public view returns (bool) {
        for(uint256 i = 0; i < whitelistedAddresses.length; i++) {
            if(whitelistedAddresses[i] == _user){
                return true;
            }
        }
        return false;
    }

  function walletOfOwner(address _owner)
    public
    view
    returns (uint256[] memory)
  {
    uint256 ownerTokenCount = balanceOf(_owner);
    uint256[] memory tokenIds = new uint256[](ownerTokenCount);
    for (uint256 i; i < ownerTokenCount; i++) {
      tokenIds[i] = tokenOfOwnerByIndex(_owner, i);
    }
    return tokenIds;
  }

  function tokenURI(uint256 tokenId)
    public
    view
    virtual
    override
    returns (string memory)
  {
    require(
      _exists(tokenId),
      "ERC721Metadata: URI query for nonexistent token"
    );

    string memory currentBaseURI = _baseURI();
    return bytes(currentBaseURI).length > 0
        ? string(abi.encodePacked(currentBaseURI, tokenId.toString(), baseExtension))
        : "";
  }

  //only owner
  function setNftAddressLimit(uint256 _limit) public onlyOwner {
    nftPerAddressLimit = _limit;
  }

  function setCost(uint256 _newCost) public onlyOwner {
    cost = _newCost;
  }

  function setmaxMintAmount(uint256 _newmaxMintAmount) public onlyOwner {
    maxMintAmount = _newmaxMintAmount;
  }

  function setBaseURI(string memory _newBaseURI) public onlyOwner {
    baseURI = _newBaseURI;
  }

  function setBaseExtension(string memory _newBaseExtension) public onlyOwner {
    baseExtension = _newBaseExtension;
  }

  function pause(bool _state) public onlyOwner {
    paused = _state;
  }
 
  function setOnlyWhitelisted(bool _state) public onlyOwner {
    onlyWhiteListed = _state;
  }

 function whitelistUsers(address[] calldata _users) public onlyOwner {
    delete whitelistedAddresses;
    whitelistedAddresses = _users;
  }
    
}
#2

the owner of an nft can transfer an nft, or an address that is approved to transfer that nft

1 Like
#3

so how can i solve this problem, i am so confused as i am new, i have been dealing with this for days