NFTOperatorFilter.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

import "@klaytn/contracts/KIP/token/KIP17/KIP17.sol";
import "@klaytn/contracts/KIP/token/KIP17/extensions/KIP17URIStorage.sol";
import "@klaytn/contracts/access/Ownable.sol";
import "@klaytn/contracts/utils/Counters.sol";
import "operator-filter-registry/src/DefaultOperatorFilterer.sol";

contract MyToken is KIP17, KIP17URIStorage, Ownable, DefaultOperatorFilterer {
    using Counters for Counters.Counter;

    Counters.Counter private _tokenIdCounter;

    constructor() KIP17("MyToken", "MTK") {}

    function safeMint(address to, string memory uri) public onlyOwner {
        uint256 tokenId = _tokenIdCounter.current();
        _tokenIdCounter.increment();
        _safeMint(to, tokenId);
        _setTokenURI(tokenId, uri);
    }

    // The following functions are overrides required by Solidity.

    function _burn(uint256 tokenId) internal override(KIP17, KIP17URIStorage) {
        super._burn(tokenId);
    }

        function setApprovalForAll(address operator, bool approved) public override onlyAllowedOperatorApproval(operator) {
        super.setApprovalForAll(operator, approved);
    }

    function approve(address operator, uint256 tokenId) public override onlyAllowedOperatorApproval(operator) {
        super.approve(operator, tokenId);
    }

    function transferFrom(address from, address to, uint256 tokenId) public override onlyAllowedOperator(from) {
        super.transferFrom(from, to, tokenId);
    }

    function safeTransferFrom(address from, address to, uint256 tokenId) public override onlyAllowedOperator(from) {
        super.safeTransferFrom(from, to, tokenId);
    }

    function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory data)
        public
        override
        onlyAllowedOperator(from)
    {
        super.safeTransferFrom(from, to, tokenId, data);
    }

    function tokenURI(uint256 tokenId)
        public
        view
        override(KIP17, KIP17URIStorage)
        returns (string memory)
    {
        return super.tokenURI(tokenId);
    }
}