ERC721Base

    /**
     *  @notice         Returns the metadata URI for an NFT.
     *  @dev            See `BatchMintMetadata` for handling of metadata in this contract.
     *
     *  @param _tokenId The tokenId of an NFT.
     */
    function tokenURI(uint256 _tokenId) public view virtual override returns (string memory) {
        string memory fullUriForToken = fullURI[_tokenId];
        if (bytes(fullUriForToken).length > 0) {
            return fullUriForToken;
        }
 
        string memory batchUri = _getBaseURI(_tokenId);
        return string(abi.encodePacked(batchUri, _tokenId.toString()));
    }
 

    /**
     *  @notice          Lets an authorized address mint an NFT to a recipient.
     *  @dev             The logic in the `_canMint` function determines whether the caller is authorized to mint NFTs.
     *
     *  @param _to       The recipient of the NFT to mint.
     *  @param _tokenURI The full metadata URI for the NFT minted.
     */
    function mintTo(address _to, string memory _tokenURI) public virtual {
        require(_canMint(), "Not authorized to mint.");
        _setTokenURI(nextTokenIdToMint(), _tokenURI);
        _safeMint(_to, 1, "");
    }

    /**
     *  @notice          Lets an authorized address mint multiple NFTs at once to a recipient.
     *  @dev             The logic in the `_canMint` function determines whether the caller is authorized to mint NFTs.
     *
     *  @param _to       The recipient of the NFT to mint.
     *  @param _quantity The number of NFTs to mint.
     *  @param _baseURI  The baseURI for the `n` number of NFTs minted. The metadata for each NFT is `baseURI/tokenId`
     *  @param _data     Additional data to pass along during the minting of the NFT.
     */
    function batchMintTo(
        address _to,
        uint256 _quantity,
        string memory _baseURI,
        bytes memory _data
    ) public virtual {
        require(_canMint(), "Not authorized to mint.");
        _batchMintMetadata(nextTokenIdToMint(), _quantity, _baseURI);
        _safeMint(_to, _quantity, _data);
    }

    /**
     *  @notice         Lets an owner or approved operator burn the NFT of the given tokenId.
     *  @dev            ERC721A's `_burn(uint256,bool)` internally checks for token approvals.
     *
     *  @param _tokenId The tokenId of the NFT to burn.
     */
    function burn(uint256 _tokenId) external virtual {
        _burn(_tokenId, true);
    }
 
    /*//////////////////////////////////////////////////////////////
                        Public getters
    //////////////////////////////////////////////////////////////*/
 
    /// @notice The tokenId assigned to the next new NFT to be minted.
    function nextTokenIdToMint() public view virtual returns (uint256) {
        return _currentIndex;
    }
 

    /// @dev See {ERC721-_transferFrom}.
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public virtual override(ERC721A) onlyAllowedOperator(from) {
        super.transferFrom(from, to, tokenId);
    }

    /// @dev See {ERC721-_safeTransferFrom}.
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public virtual override(ERC721A) onlyAllowedOperator(from) {
        super.safeTransferFrom(from, to, tokenId);
    }