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contracts...tokens...Token721...Hellonft.sol

//SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/security/Pausable.sol";
import "@openzeppelin/contracts/utils/Counters.sol";

/// @custom:security contact [email protected]
contract HelloNFT is ERC721,ERC721URIStorage,Ownable,Pausable {

    using Counters for Counters.Counter;
    Counters.Counter private _tokenIds;

    constructor() ERC721("HelloNFT","HHFT"){
    }

    function awardNFT(address receiver,string memory uri)
    public onlyOwner
    returns(uint256)
    {
        uint256 newItemId = _tokenIds.current();
        _safeMint(receiver,newItemId);
        _setTokenURI(newItemId,uri);
        _tokenIds.increment();

        return newItemId;

    }

    function pause() public onlyOwner{
        _pause();
    }

    function unpause() public onlyOwner{
        _unpause();
    }

    function _beforeTokenTransfer(address from,address to,uint256 tokenId,uint256 batchSize)
    internal
    whenNotPaused
    override
    {
        super._beforeTokenTransfer(from,to,tokenId,batchSize);
    }

    //required by solidity when addd ERC721 in derived seciton

    function _burn(uint256 tokenId) internal onlyOwner
    override(ERC721,ERC721URIStorage)
    {
        super._burn(tokenId);
    }

    function tokenURI(uint256 tokenId)
    public view
    override(ERC721,ERC721URIStorage)
    returns(string memory)
    {
        return super.tokenURI(tokenId);
    }



}