ETH Price: $2,780.21 (+6.79%)

Transaction Decoder

Block:
22877059 at Jul-08-2025 09:08:47 PM +UTC
Transaction Fee:
0.00010521543 ETH $0.29
Gas Used:
93,111 Gas / 1.13 Gwei

Emitted Events:

299 WLYBox.Approval( owner=[Receiver] 0xbfe6a440a5fe0822dfe72b0fa1893f68462555eb, approved=0x00000000...000000000, tokenId=356 )
300 WLYBox.Transfer( from=[Receiver] 0xbfe6a440a5fe0822dfe72b0fa1893f68462555eb, to=[Sender] 0xc1df99d6a67be1fbab258b9b334811ae672707a0, tokenId=356 )
301 0xbfe6a440a5fe0822dfe72b0fa1893f68462555eb.0x446928f7fd842bfa1ad8f7d2aadcfdda1bf5b4c1fef6fcec88d2484bc4478e48( 0x446928f7fd842bfa1ad8f7d2aadcfdda1bf5b4c1fef6fcec88d2484bc4478e48, 0x000000000000000000000000c1df99d6a67be1fbab258b9b334811ae672707a0, 0000000000000000000000000000000000000000000000000000000000000040, 00000000000000000000000000000000000000000000000000000000000001c0, 0000000000000000000000000000000000000000000000000000000000000001, 0000000000000000000000000000000000000000000000000000000000000020, 00000000000000000000000002360405a8a1044267e844d1be6543482fe40ab3, 0000000000000000000000000000000000000000000000000000000000000000, 0000000000000000000000000000000000000000000000000000000000000060, 00000000000000000000000000000000000000000000000000000000000000a4, b88d4fde000000000000000000000000bfe6a440a5fe0822dfe72b0fa1893f68, 462555eb000000000000000000000000c1df99d6a67be1fbab258b9b334811ae, 672707a000000000000000000000000000000000000000000000000000000000, 0000016400000000000000000000000000000000000000000000000000000000, 0000008000000000000000000000000000000000000000000000000000000000, 0000000000000000000000000000000000000000000000000000000000000000, 0000000000000000000000000000000000000000000000000000000000000001, 0000000000000000000000000000000000000000000000000000000000000020, 0000000000000000000000000000000000000000000000000000000000000000 )

Account State Difference:

  Address   Before After State Difference Code
0x02360405...82FE40Ab3
0xbFE6a440...8462555eB From: 22892027069488871726777845421492261844457874613051320068 To: 22892027718979953966499050587140250401159018568423161883
0xc1df99d6...E672707a0
0.031742642420925168 Eth
Nonce: 598
0.031637426990925168 Eth
Nonce: 599
0.00010521543
(BuilderNet)
60.792585842687520798 Eth60.792599579164056135 Eth0.000013736476535337

Execution Trace

0xbfe6a440a5fe0822dfe72b0fa1893f68462555eb.34fcd5be( )
  • WLYBox.safeTransferFrom( from=0xbFE6a440A5Fe0822dFe72b0Fa1893f68462555eB, to=0xc1df99d6A67bE1Fbab258B9B334811aE672707a0, tokenId=356, _data=0x )
    // SPDX-License-Identifier: MIT
    import "@openzeppelin/contracts/access/Ownable.sol";
    import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
    import "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol";
    import "@openzeppelin/contracts/security/Pausable.sol";
    import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
    import "@openzeppelin/contracts/utils/Counters.sol";
    pragma solidity ^0.8.7;
    abstract contract WLYInterface {
        function mint(address address_, uint256 tokenId_) public virtual returns (uint256);
    }
    contract WLYBox is ERC721, Ownable, Pausable, ReentrancyGuard {
        event BaseURIChanged(string newBaseURI);
        event WhitelistSaleConfigChanged(WhitelistSaleConfig config);
        event PublicSaleConfigChanged(PublicSaleConfig config);
        event RevealConfigChanged(RevealConfig config);
        event Withdraw(address indexed account, uint256 amount);
        event ContractSealed();
        struct WhitelistSaleConfig {
            uint64 mintQuota;
            uint256 startTime;
            uint256 endTime;
            bytes32 merkleRoot;
            uint256 price;
        }
        struct WaitlistSaleConfig {
            uint64 mintQuota;
            uint256 startTime;
            uint256 endTime;
            bytes32 merkleRoot;
            uint256 price;
        }
        struct PublicSaleConfig {
            uint256 startTime;
            uint256 price;
            uint64 mintQuota;
        }
        struct RevealConfig {
            uint64 startTime;
            address wlyContractAddress;
        }
        struct AirdropConfig {
            address airdropAddress;
            uint64 num;
        }
        uint256 public MAX_TOKEN = 3000;
        uint256 public totalMinted=0;
        bool public contractSealed;
        string public baseURI;
        mapping(address=>uint256) userMintCount;
        WhitelistSaleConfig public whitelistSaleConfig;
        WaitlistSaleConfig public waitlistSaleConfig;
        PublicSaleConfig public publicSaleConfig;
        RevealConfig public revealConfig;
        using Counters for Counters.Counter;
        Counters.Counter private _tokenIdCounter;
        constructor(string memory baseURI_, WhitelistSaleConfig memory whiteSaleConfig_) ERC721("Wuliangye NFT", "WLY") {
            baseURI = baseURI_;
            whitelistSaleConfig = whiteSaleConfig_;
        }
        function giveaway(AirdropConfig[] memory air) external onlyOwner nonReentrant {
            for (uint256 j;j<air.length;j++){
                require(air[j].airdropAddress != address(0), "zero address");
                require(air[j].num > 0, "invalid number of tokens");
                require(totalMinted + air[j].num <= MAX_TOKEN, "max supply exceeded");
                for(uint64 i=0;i<air[j].num;i++){
                    mintNFT(air[j].airdropAddress);
                }
            }
        }
        function whitelistSale(bytes32[] calldata signature_) external payable callerIsUser nonReentrant {
            require(isWhitelistSaleEnabled(), "whitelist sale has not enabled");
            require(isWhitelistAddress(_msgSender(), signature_), "caller is not in whitelist or invalid signature");
            require(userMintCount[_msgSender()] < whitelistSaleConfig.mintQuota, "every account max supply exceeded");
            _sale(getWhitelistSalePrice());
        }
        function waitlistSale(bytes32[] calldata signature_) external payable callerIsUser nonReentrant {
            require(isWaitlistSaleEnabled(), "waitlist sale has not enabled");
            require(isWaitlistAddress(_msgSender(), signature_), "caller is not in waitlist or invalid signature");
            require(userMintCount[_msgSender()] < waitlistSaleConfig.mintQuota, "every account max supply exceeded");
            _sale(getWaitlistSalePrice());
        }
        function publicSale() external payable callerIsUser nonReentrant {
            require(isPublicSaleEnabled(), "public sale has not enabled");
            require(userMintCount[_msgSender()] < publicSaleConfig.mintQuota, "every account max supply exceeded");
            _sale(getPublicSalePrice());
        }
        function _sale(uint256 price_) internal {
            require(totalMinted+1 <= MAX_TOKEN, "max supply exceeded");
            require(price_ <= msg.value, "ether value sent is not correct");
            mintNFT(_msgSender());
        }
        function mintNFT(address to) internal {
            totalMinted++;
            userMintCount[_msgSender()]+=1;
            _tokenIdCounter.increment();
            uint256 tokenId = _tokenIdCounter.current();
            _safeMint(to, tokenId);
        }
        function reveal(uint256 tokenId_) external callerIsUser nonReentrant returns (uint256) {
            require(isRevealEnabled(), "reveal has not enabled");
            require(ownerOf(tokenId_) == _msgSender(), "caller is not owner");
            _burn(tokenId_);
            WLYInterface wlyContract = WLYInterface(revealConfig.wlyContractAddress);
            uint256 wlyTokenId = wlyContract.mint(_msgSender(), tokenId_);
            return wlyTokenId;
        }
        function withdraw(uint256 _amount) external onlyOwner nonReentrant {
            payable(_msgSender()).transfer(_amount);
            emit Withdraw(_msgSender(), _amount);
        }
        function isWhitelistSaleEnabled() public view returns (bool) {
            if (whitelistSaleConfig.endTime > 0 && block.timestamp > whitelistSaleConfig.endTime) {
                return false;
            }
            return whitelistSaleConfig.startTime > 0 &&
            block.timestamp > whitelistSaleConfig.startTime &&
            whitelistSaleConfig.price > 0 &&
            whitelistSaleConfig.merkleRoot != "";
        }
        function isWaitlistSaleEnabled() public view returns (bool) {
            if (waitlistSaleConfig.endTime > 0 && block.timestamp > waitlistSaleConfig.endTime) {
                return false;
            }
            return waitlistSaleConfig.startTime > 0 &&
            block.timestamp > waitlistSaleConfig.startTime &&
            waitlistSaleConfig.price > 0 &&
            waitlistSaleConfig.merkleRoot != "";
        }
        function isRevealEnabled() public view returns (bool) {
            return revealConfig.startTime > 0 &&
            block.timestamp > revealConfig.startTime &&
            revealConfig.wlyContractAddress != address(0);
        }
        function isWhitelistAddress(address address_, bytes32[] calldata signature_) public view returns (bool) {
            if (whitelistSaleConfig.merkleRoot == "") {
                return false;
            }
            return MerkleProof.verify(
                signature_,
                whitelistSaleConfig.merkleRoot,
                keccak256(abi.encodePacked(address_))
            );
        }
        function isWaitlistAddress(address address_, bytes32[] calldata signature_) public view returns (bool) {
            if (waitlistSaleConfig.merkleRoot == "") {
                return false;
            }
            return MerkleProof.verify(
                signature_,
                waitlistSaleConfig.merkleRoot,
                keccak256(abi.encodePacked(address_))
            );
        }
        function getWhitelistSalePrice() public view returns (uint256) {
            return whitelistSaleConfig.price;
        }
        function getWaitlistSalePrice() public view returns (uint256) {
            return waitlistSaleConfig.price;
        }
        function _baseURI() internal view virtual override returns (string memory) {
            return baseURI;
        }
        function setBaseURI(string calldata baseURI_) external onlyOwner {
            baseURI = baseURI_;
            emit BaseURIChanged(baseURI_);
        }
        function setWhitelistSaleConfig(WhitelistSaleConfig calldata config_) external onlyOwner {
            require(config_.price > 0, "sale price must greater than zero");
            whitelistSaleConfig = config_;
            emit WhitelistSaleConfigChanged(config_);
        }
        function setWaitlistSaleConfig(WaitlistSaleConfig calldata config_) external onlyOwner {
            require(config_.price > 0, "sale price must greater than zero");
            waitlistSaleConfig = config_;
        }
        function setPublicSaleConfig(PublicSaleConfig calldata config_) external onlyOwner {
            require(config_.price > 0, "sale price must greater than zero");
            publicSaleConfig = config_;
            emit PublicSaleConfigChanged(config_);
        }
        function setRevealConfig(RevealConfig calldata config_) external onlyOwner {
            revealConfig = config_;
            emit RevealConfigChanged(config_);
        }
        function isPublicSaleEnabled() public view returns (bool) {
            return publicSaleConfig.startTime > 0 &&
            block.timestamp > publicSaleConfig.startTime &&
            publicSaleConfig.price > 0;
        }
        function getPublicSalePrice() public view returns (uint256) {
            return publicSaleConfig.price;
        }
        function _beforeTokenTransfer(
            address from,
            address to,
            uint256 startTokenId
        ) internal override{
            super._beforeTokenTransfer(from, to, startTokenId);
            require(!paused(), "token transfer paused");
        }
        function emergencyPause() external onlyOwner notSealed {
            _pause();
        }
        function unpause() external onlyOwner notSealed {
            _unpause();
        }
        function sealContract() external onlyOwner {
            contractSealed = true;
            emit ContractSealed();
        }
        modifier callerIsUser() {
            require(tx.origin == _msgSender(), "caller is another contract");
            _;
        }
        modifier notSealed() {
            require(!contractSealed, "contract sealed");
            _;
        }
    }
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts v4.4.1 (utils/Counters.sol)
    pragma solidity ^0.8.0;
    /**
     * @title Counters
     * @author Matt Condon (@shrugs)
     * @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
     * of elements in a mapping, issuing ERC721 ids, or counting request ids.
     *
     * Include with `using Counters for Counters.Counter;`
     */
    library Counters {
        struct Counter {
            // This variable should never be directly accessed by users of the library: interactions must be restricted to
            // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
            // this feature: see https://github.com/ethereum/solidity/issues/4637
            uint256 _value; // default: 0
        }
        function current(Counter storage counter) internal view returns (uint256) {
            return counter._value;
        }
        function increment(Counter storage counter) internal {
            unchecked {
                counter._value += 1;
            }
        }
        function decrement(Counter storage counter) internal {
            uint256 value = counter._value;
            require(value > 0, "Counter: decrement overflow");
            unchecked {
                counter._value = value - 1;
            }
        }
        function reset(Counter storage counter) internal {
            counter._value = 0;
        }
    }
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/ERC721.sol)
    pragma solidity ^0.8.0;
    import "./IERC721.sol";
    import "./IERC721Receiver.sol";
    import "./extensions/IERC721Metadata.sol";
    import "../../utils/Address.sol";
    import "../../utils/Context.sol";
    import "../../utils/Strings.sol";
    import "../../utils/introspection/ERC165.sol";
    /**
     * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
     * the Metadata extension, but not including the Enumerable extension, which is available separately as
     * {ERC721Enumerable}.
     */
    contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
        using Address for address;
        using Strings for uint256;
        // Token name
        string private _name;
        // Token symbol
        string private _symbol;
        // Mapping from token ID to owner address
        mapping(uint256 => address) private _owners;
        // Mapping owner address to token count
        mapping(address => uint256) private _balances;
        // Mapping from token ID to approved address
        mapping(uint256 => address) private _tokenApprovals;
        // Mapping from owner to operator approvals
        mapping(address => mapping(address => bool)) private _operatorApprovals;
        /**
         * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
         */
        constructor(string memory name_, string memory symbol_) {
            _name = name_;
            _symbol = symbol_;
        }
        /**
         * @dev See {IERC165-supportsInterface}.
         */
        function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
            return
                interfaceId == type(IERC721).interfaceId ||
                interfaceId == type(IERC721Metadata).interfaceId ||
                super.supportsInterface(interfaceId);
        }
        /**
         * @dev See {IERC721-balanceOf}.
         */
        function balanceOf(address owner) public view virtual override returns (uint256) {
            require(owner != address(0), "ERC721: balance query for the zero address");
            return _balances[owner];
        }
        /**
         * @dev See {IERC721-ownerOf}.
         */
        function ownerOf(uint256 tokenId) public view virtual override returns (address) {
            address owner = _owners[tokenId];
            require(owner != address(0), "ERC721: owner query for nonexistent token");
            return owner;
        }
        /**
         * @dev See {IERC721Metadata-name}.
         */
        function name() public view virtual override returns (string memory) {
            return _name;
        }
        /**
         * @dev See {IERC721Metadata-symbol}.
         */
        function symbol() public view virtual override returns (string memory) {
            return _symbol;
        }
        /**
         * @dev See {IERC721Metadata-tokenURI}.
         */
        function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
            require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
            string memory baseURI = _baseURI();
            return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
        }
        /**
         * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
         * token will be the concatenation of the `baseURI` and the `tokenId`. Empty
         * by default, can be overridden in child contracts.
         */
        function _baseURI() internal view virtual returns (string memory) {
            return "";
        }
        /**
         * @dev See {IERC721-approve}.
         */
        function approve(address to, uint256 tokenId) public virtual override {
            address owner = ERC721.ownerOf(tokenId);
            require(to != owner, "ERC721: approval to current owner");
            require(
                _msgSender() == owner || isApprovedForAll(owner, _msgSender()),
                "ERC721: approve caller is not owner nor approved for all"
            );
            _approve(to, tokenId);
        }
        /**
         * @dev See {IERC721-getApproved}.
         */
        function getApproved(uint256 tokenId) public view virtual override returns (address) {
            require(_exists(tokenId), "ERC721: approved query for nonexistent token");
            return _tokenApprovals[tokenId];
        }
        /**
         * @dev See {IERC721-setApprovalForAll}.
         */
        function setApprovalForAll(address operator, bool approved) public virtual override {
            _setApprovalForAll(_msgSender(), operator, approved);
        }
        /**
         * @dev See {IERC721-isApprovedForAll}.
         */
        function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
            return _operatorApprovals[owner][operator];
        }
        /**
         * @dev See {IERC721-transferFrom}.
         */
        function transferFrom(
            address from,
            address to,
            uint256 tokenId
        ) public virtual override {
            //solhint-disable-next-line max-line-length
            require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
            _transfer(from, to, tokenId);
        }
        /**
         * @dev See {IERC721-safeTransferFrom}.
         */
        function safeTransferFrom(
            address from,
            address to,
            uint256 tokenId
        ) public virtual override {
            safeTransferFrom(from, to, tokenId, "");
        }
        /**
         * @dev See {IERC721-safeTransferFrom}.
         */
        function safeTransferFrom(
            address from,
            address to,
            uint256 tokenId,
            bytes memory _data
        ) public virtual override {
            require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
            _safeTransfer(from, to, tokenId, _data);
        }
        /**
         * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
         * are aware of the ERC721 protocol to prevent tokens from being forever locked.
         *
         * `_data` is additional data, it has no specified format and it is sent in call to `to`.
         *
         * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
         * implement alternative mechanisms to perform token transfer, such as signature-based.
         *
         * Requirements:
         *
         * - `from` cannot be the zero address.
         * - `to` cannot be the zero address.
         * - `tokenId` token must exist and be owned by `from`.
         * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
         *
         * Emits a {Transfer} event.
         */
        function _safeTransfer(
            address from,
            address to,
            uint256 tokenId,
            bytes memory _data
        ) internal virtual {
            _transfer(from, to, tokenId);
            require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
        }
        /**
         * @dev Returns whether `tokenId` exists.
         *
         * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
         *
         * Tokens start existing when they are minted (`_mint`),
         * and stop existing when they are burned (`_burn`).
         */
        function _exists(uint256 tokenId) internal view virtual returns (bool) {
            return _owners[tokenId] != address(0);
        }
        /**
         * @dev Returns whether `spender` is allowed to manage `tokenId`.
         *
         * Requirements:
         *
         * - `tokenId` must exist.
         */
        function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
            require(_exists(tokenId), "ERC721: operator query for nonexistent token");
            address owner = ERC721.ownerOf(tokenId);
            return (spender == owner || isApprovedForAll(owner, spender) || getApproved(tokenId) == spender);
        }
        /**
         * @dev Safely mints `tokenId` and transfers it to `to`.
         *
         * Requirements:
         *
         * - `tokenId` must not exist.
         * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
         *
         * Emits a {Transfer} event.
         */
        function _safeMint(address to, uint256 tokenId) internal virtual {
            _safeMint(to, tokenId, "");
        }
        /**
         * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
         * forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
         */
        function _safeMint(
            address to,
            uint256 tokenId,
            bytes memory _data
        ) internal virtual {
            _mint(to, tokenId);
            require(
                _checkOnERC721Received(address(0), to, tokenId, _data),
                "ERC721: transfer to non ERC721Receiver implementer"
            );
        }
        /**
         * @dev Mints `tokenId` and transfers it to `to`.
         *
         * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
         *
         * Requirements:
         *
         * - `tokenId` must not exist.
         * - `to` cannot be the zero address.
         *
         * Emits a {Transfer} event.
         */
        function _mint(address to, uint256 tokenId) internal virtual {
            require(to != address(0), "ERC721: mint to the zero address");
            require(!_exists(tokenId), "ERC721: token already minted");
            _beforeTokenTransfer(address(0), to, tokenId);
            _balances[to] += 1;
            _owners[tokenId] = to;
            emit Transfer(address(0), to, tokenId);
            _afterTokenTransfer(address(0), to, tokenId);
        }
        /**
         * @dev Destroys `tokenId`.
         * The approval is cleared when the token is burned.
         *
         * Requirements:
         *
         * - `tokenId` must exist.
         *
         * Emits a {Transfer} event.
         */
        function _burn(uint256 tokenId) internal virtual {
            address owner = ERC721.ownerOf(tokenId);
            _beforeTokenTransfer(owner, address(0), tokenId);
            // Clear approvals
            _approve(address(0), tokenId);
            _balances[owner] -= 1;
            delete _owners[tokenId];
            emit Transfer(owner, address(0), tokenId);
            _afterTokenTransfer(owner, address(0), tokenId);
        }
        /**
         * @dev Transfers `tokenId` from `from` to `to`.
         *  As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
         *
         * Requirements:
         *
         * - `to` cannot be the zero address.
         * - `tokenId` token must be owned by `from`.
         *
         * Emits a {Transfer} event.
         */
        function _transfer(
            address from,
            address to,
            uint256 tokenId
        ) internal virtual {
            require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner");
            require(to != address(0), "ERC721: transfer to the zero address");
            _beforeTokenTransfer(from, to, tokenId);
            // Clear approvals from the previous owner
            _approve(address(0), tokenId);
            _balances[from] -= 1;
            _balances[to] += 1;
            _owners[tokenId] = to;
            emit Transfer(from, to, tokenId);
            _afterTokenTransfer(from, to, tokenId);
        }
        /**
         * @dev Approve `to` to operate on `tokenId`
         *
         * Emits a {Approval} event.
         */
        function _approve(address to, uint256 tokenId) internal virtual {
            _tokenApprovals[tokenId] = to;
            emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
        }
        /**
         * @dev Approve `operator` to operate on all of `owner` tokens
         *
         * Emits a {ApprovalForAll} event.
         */
        function _setApprovalForAll(
            address owner,
            address operator,
            bool approved
        ) internal virtual {
            require(owner != operator, "ERC721: approve to caller");
            _operatorApprovals[owner][operator] = approved;
            emit ApprovalForAll(owner, operator, approved);
        }
        /**
         * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
         * The call is not executed if the target address is not a contract.
         *
         * @param from address representing the previous owner of the given token ID
         * @param to target address that will receive the tokens
         * @param tokenId uint256 ID of the token to be transferred
         * @param _data bytes optional data to send along with the call
         * @return bool whether the call correctly returned the expected magic value
         */
        function _checkOnERC721Received(
            address from,
            address to,
            uint256 tokenId,
            bytes memory _data
        ) private returns (bool) {
            if (to.isContract()) {
                try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
                    return retval == IERC721Receiver.onERC721Received.selector;
                } catch (bytes memory reason) {
                    if (reason.length == 0) {
                        revert("ERC721: transfer to non ERC721Receiver implementer");
                    } else {
                        assembly {
                            revert(add(32, reason), mload(reason))
                        }
                    }
                }
            } else {
                return true;
            }
        }
        /**
         * @dev Hook that is called before any token transfer. This includes minting
         * and burning.
         *
         * Calling conditions:
         *
         * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
         * transferred to `to`.
         * - When `from` is zero, `tokenId` will be minted for `to`.
         * - When `to` is zero, ``from``'s `tokenId` will be burned.
         * - `from` and `to` are never both zero.
         *
         * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
         */
        function _beforeTokenTransfer(
            address from,
            address to,
            uint256 tokenId
        ) internal virtual {}
        /**
         * @dev Hook that is called after any transfer of tokens. This includes
         * minting and burning.
         *
         * Calling conditions:
         *
         * - when `from` and `to` are both non-zero.
         * - `from` and `to` are never both zero.
         *
         * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
         */
        function _afterTokenTransfer(
            address from,
            address to,
            uint256 tokenId
        ) internal virtual {}
    }
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)
    pragma solidity ^0.8.0;
    import "../utils/Context.sol";
    /**
     * @dev Contract module which allows children to implement an emergency stop
     * mechanism that can be triggered by an authorized account.
     *
     * This module is used through inheritance. It will make available the
     * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
     * the functions of your contract. Note that they will not be pausable by
     * simply including this module, only once the modifiers are put in place.
     */
    abstract contract Pausable is Context {
        /**
         * @dev Emitted when the pause is triggered by `account`.
         */
        event Paused(address account);
        /**
         * @dev Emitted when the pause is lifted by `account`.
         */
        event Unpaused(address account);
        bool private _paused;
        /**
         * @dev Initializes the contract in unpaused state.
         */
        constructor() {
            _paused = false;
        }
        /**
         * @dev Returns true if the contract is paused, and false otherwise.
         */
        function paused() public view virtual returns (bool) {
            return _paused;
        }
        /**
         * @dev Modifier to make a function callable only when the contract is not paused.
         *
         * Requirements:
         *
         * - The contract must not be paused.
         */
        modifier whenNotPaused() {
            require(!paused(), "Pausable: paused");
            _;
        }
        /**
         * @dev Modifier to make a function callable only when the contract is paused.
         *
         * Requirements:
         *
         * - The contract must be paused.
         */
        modifier whenPaused() {
            require(paused(), "Pausable: not paused");
            _;
        }
        /**
         * @dev Triggers stopped state.
         *
         * Requirements:
         *
         * - The contract must not be paused.
         */
        function _pause() internal virtual whenNotPaused {
            _paused = true;
            emit Paused(_msgSender());
        }
        /**
         * @dev Returns to normal state.
         *
         * Requirements:
         *
         * - The contract must be paused.
         */
        function _unpause() internal virtual whenPaused {
            _paused = false;
            emit Unpaused(_msgSender());
        }
    }
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v4.7.0) (utils/cryptography/MerkleProof.sol)
    pragma solidity ^0.8.0;
    /**
     * @dev These functions deal with verification of Merkle Tree proofs.
     *
     * The proofs can be generated using the JavaScript library
     * https://github.com/miguelmota/merkletreejs[merkletreejs].
     * Note: the hashing algorithm should be keccak256 and pair sorting should be enabled.
     *
     * See `test/utils/cryptography/MerkleProof.test.js` for some examples.
     *
     * WARNING: You should avoid using leaf values that are 64 bytes long prior to
     * hashing, or use a hash function other than keccak256 for hashing leaves.
     * This is because the concatenation of a sorted pair of internal nodes in
     * the merkle tree could be reinterpreted as a leaf value.
     */
    library MerkleProof {
        /**
         * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
         * defined by `root`. For this, a `proof` must be provided, containing
         * sibling hashes on the branch from the leaf to the root of the tree. Each
         * pair of leaves and each pair of pre-images are assumed to be sorted.
         */
        function verify(
            bytes32[] memory proof,
            bytes32 root,
            bytes32 leaf
        ) internal pure returns (bool) {
            return processProof(proof, leaf) == root;
        }
        /**
         * @dev Calldata version of {verify}
         *
         * _Available since v4.7._
         */
        function verifyCalldata(
            bytes32[] calldata proof,
            bytes32 root,
            bytes32 leaf
        ) internal pure returns (bool) {
            return processProofCalldata(proof, leaf) == root;
        }
        /**
         * @dev Returns the rebuilt hash obtained by traversing a Merkle tree up
         * from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt
         * hash matches the root of the tree. When processing the proof, the pairs
         * of leafs & pre-images are assumed to be sorted.
         *
         * _Available since v4.4._
         */
        function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) {
            bytes32 computedHash = leaf;
            for (uint256 i = 0; i < proof.length; i++) {
                computedHash = _hashPair(computedHash, proof[i]);
            }
            return computedHash;
        }
        /**
         * @dev Calldata version of {processProof}
         *
         * _Available since v4.7._
         */
        function processProofCalldata(bytes32[] calldata proof, bytes32 leaf) internal pure returns (bytes32) {
            bytes32 computedHash = leaf;
            for (uint256 i = 0; i < proof.length; i++) {
                computedHash = _hashPair(computedHash, proof[i]);
            }
            return computedHash;
        }
        /**
         * @dev Returns true if the `leaves` can be proved to be a part of a Merkle tree defined by
         * `root`, according to `proof` and `proofFlags` as described in {processMultiProof}.
         *
         * _Available since v4.7._
         */
        function multiProofVerify(
            bytes32[] memory proof,
            bool[] memory proofFlags,
            bytes32 root,
            bytes32[] memory leaves
        ) internal pure returns (bool) {
            return processMultiProof(proof, proofFlags, leaves) == root;
        }
        /**
         * @dev Calldata version of {multiProofVerify}
         *
         * _Available since v4.7._
         */
        function multiProofVerifyCalldata(
            bytes32[] calldata proof,
            bool[] calldata proofFlags,
            bytes32 root,
            bytes32[] memory leaves
        ) internal pure returns (bool) {
            return processMultiProofCalldata(proof, proofFlags, leaves) == root;
        }
        /**
         * @dev Returns the root of a tree reconstructed from `leaves` and the sibling nodes in `proof`,
         * consuming from one or the other at each step according to the instructions given by
         * `proofFlags`.
         *
         * _Available since v4.7._
         */
        function processMultiProof(
            bytes32[] memory proof,
            bool[] memory proofFlags,
            bytes32[] memory leaves
        ) internal pure returns (bytes32 merkleRoot) {
            // This function rebuild the root hash by traversing the tree up from the leaves. The root is rebuilt by
            // consuming and producing values on a queue. The queue starts with the `leaves` array, then goes onto the
            // `hashes` array. At the end of the process, the last hash in the `hashes` array should contain the root of
            // the merkle tree.
            uint256 leavesLen = leaves.length;
            uint256 totalHashes = proofFlags.length;
            // Check proof validity.
            require(leavesLen + proof.length - 1 == totalHashes, "MerkleProof: invalid multiproof");
            // The xxxPos values are "pointers" to the next value to consume in each array. All accesses are done using
            // `xxx[xxxPos++]`, which return the current value and increment the pointer, thus mimicking a queue's "pop".
            bytes32[] memory hashes = new bytes32[](totalHashes);
            uint256 leafPos = 0;
            uint256 hashPos = 0;
            uint256 proofPos = 0;
            // At each step, we compute the next hash using two values:
            // - a value from the "main queue". If not all leaves have been consumed, we get the next leaf, otherwise we
            //   get the next hash.
            // - depending on the flag, either another value for the "main queue" (merging branches) or an element from the
            //   `proof` array.
            for (uint256 i = 0; i < totalHashes; i++) {
                bytes32 a = leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++];
                bytes32 b = proofFlags[i] ? leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++] : proof[proofPos++];
                hashes[i] = _hashPair(a, b);
            }
            if (totalHashes > 0) {
                return hashes[totalHashes - 1];
            } else if (leavesLen > 0) {
                return leaves[0];
            } else {
                return proof[0];
            }
        }
        /**
         * @dev Calldata version of {processMultiProof}
         *
         * _Available since v4.7._
         */
        function processMultiProofCalldata(
            bytes32[] calldata proof,
            bool[] calldata proofFlags,
            bytes32[] memory leaves
        ) internal pure returns (bytes32 merkleRoot) {
            // This function rebuild the root hash by traversing the tree up from the leaves. The root is rebuilt by
            // consuming and producing values on a queue. The queue starts with the `leaves` array, then goes onto the
            // `hashes` array. At the end of the process, the last hash in the `hashes` array should contain the root of
            // the merkle tree.
            uint256 leavesLen = leaves.length;
            uint256 totalHashes = proofFlags.length;
            // Check proof validity.
            require(leavesLen + proof.length - 1 == totalHashes, "MerkleProof: invalid multiproof");
            // The xxxPos values are "pointers" to the next value to consume in each array. All accesses are done using
            // `xxx[xxxPos++]`, which return the current value and increment the pointer, thus mimicking a queue's "pop".
            bytes32[] memory hashes = new bytes32[](totalHashes);
            uint256 leafPos = 0;
            uint256 hashPos = 0;
            uint256 proofPos = 0;
            // At each step, we compute the next hash using two values:
            // - a value from the "main queue". If not all leaves have been consumed, we get the next leaf, otherwise we
            //   get the next hash.
            // - depending on the flag, either another value for the "main queue" (merging branches) or an element from the
            //   `proof` array.
            for (uint256 i = 0; i < totalHashes; i++) {
                bytes32 a = leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++];
                bytes32 b = proofFlags[i] ? leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++] : proof[proofPos++];
                hashes[i] = _hashPair(a, b);
            }
            if (totalHashes > 0) {
                return hashes[totalHashes - 1];
            } else if (leavesLen > 0) {
                return leaves[0];
            } else {
                return proof[0];
            }
        }
        function _hashPair(bytes32 a, bytes32 b) private pure returns (bytes32) {
            return a < b ? _efficientHash(a, b) : _efficientHash(b, a);
        }
        function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) {
            /// @solidity memory-safe-assembly
            assembly {
                mstore(0x00, a)
                mstore(0x20, b)
                value := keccak256(0x00, 0x40)
            }
        }
    }
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)
    pragma solidity ^0.8.0;
    /**
     * @dev Contract module that helps prevent reentrant calls to a function.
     *
     * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
     * available, which can be applied to functions to make sure there are no nested
     * (reentrant) calls to them.
     *
     * Note that because there is a single `nonReentrant` guard, functions marked as
     * `nonReentrant` may not call one another. This can be worked around by making
     * those functions `private`, and then adding `external` `nonReentrant` entry
     * points to them.
     *
     * TIP: If you would like to learn more about reentrancy and alternative ways
     * to protect against it, check out our blog post
     * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
     */
    abstract contract ReentrancyGuard {
        // Booleans are more expensive than uint256 or any type that takes up a full
        // word because each write operation emits an extra SLOAD to first read the
        // slot's contents, replace the bits taken up by the boolean, and then write
        // back. This is the compiler's defense against contract upgrades and
        // pointer aliasing, and it cannot be disabled.
        // The values being non-zero value makes deployment a bit more expensive,
        // but in exchange the refund on every call to nonReentrant will be lower in
        // amount. Since refunds are capped to a percentage of the total
        // transaction's gas, it is best to keep them low in cases like this one, to
        // increase the likelihood of the full refund coming into effect.
        uint256 private constant _NOT_ENTERED = 1;
        uint256 private constant _ENTERED = 2;
        uint256 private _status;
        constructor() {
            _status = _NOT_ENTERED;
        }
        /**
         * @dev Prevents a contract from calling itself, directly or indirectly.
         * Calling a `nonReentrant` function from another `nonReentrant`
         * function is not supported. It is possible to prevent this from happening
         * by making the `nonReentrant` function external, and making it call a
         * `private` function that does the actual work.
         */
        modifier nonReentrant() {
            // On the first call to nonReentrant, _notEntered will be true
            require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
            // Any calls to nonReentrant after this point will fail
            _status = _ENTERED;
            _;
            // By storing the original value once again, a refund is triggered (see
            // https://eips.ethereum.org/EIPS/eip-2200)
            _status = _NOT_ENTERED;
        }
    }
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)
    pragma solidity ^0.8.0;
    import "../utils/Context.sol";
    /**
     * @dev Contract module which provides a basic access control mechanism, where
     * there is an account (an owner) that can be granted exclusive access to
     * specific functions.
     *
     * By default, the owner account will be the one that deploys the contract. This
     * can later be changed with {transferOwnership}.
     *
     * This module is used through inheritance. It will make available the modifier
     * `onlyOwner`, which can be applied to your functions to restrict their use to
     * the owner.
     */
    abstract contract Ownable is Context {
        address private _owner;
        event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
        /**
         * @dev Initializes the contract setting the deployer as the initial owner.
         */
        constructor() {
            _transferOwnership(_msgSender());
        }
        /**
         * @dev Returns the address of the current owner.
         */
        function owner() public view virtual returns (address) {
            return _owner;
        }
        /**
         * @dev Throws if called by any account other than the owner.
         */
        modifier onlyOwner() {
            require(owner() == _msgSender(), "Ownable: caller is not the owner");
            _;
        }
        /**
         * @dev Leaves the contract without owner. It will not be possible to call
         * `onlyOwner` functions anymore. Can only be called by the current owner.
         *
         * NOTE: Renouncing ownership will leave the contract without an owner,
         * thereby removing any functionality that is only available to the owner.
         */
        function renounceOwnership() public virtual onlyOwner {
            _transferOwnership(address(0));
        }
        /**
         * @dev Transfers ownership of the contract to a new account (`newOwner`).
         * Can only be called by the current owner.
         */
        function transferOwnership(address newOwner) public virtual onlyOwner {
            require(newOwner != address(0), "Ownable: new owner is the zero address");
            _transferOwnership(newOwner);
        }
        /**
         * @dev Transfers ownership of the contract to a new account (`newOwner`).
         * Internal function without access restriction.
         */
        function _transferOwnership(address newOwner) internal virtual {
            address oldOwner = _owner;
            _owner = newOwner;
            emit OwnershipTransferred(oldOwner, newOwner);
        }
    }
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
    pragma solidity ^0.8.0;
    import "./IERC165.sol";
    /**
     * @dev Implementation of the {IERC165} interface.
     *
     * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
     * for the additional interface id that will be supported. For example:
     *
     * ```solidity
     * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
     *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
     * }
     * ```
     *
     * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
     */
    abstract contract ERC165 is IERC165 {
        /**
         * @dev See {IERC165-supportsInterface}.
         */
        function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
            return interfaceId == type(IERC165).interfaceId;
        }
    }
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)
    pragma solidity ^0.8.0;
    /**
     * @dev String operations.
     */
    library Strings {
        bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
        /**
         * @dev Converts a `uint256` to its ASCII `string` decimal representation.
         */
        function toString(uint256 value) internal pure returns (string memory) {
            // Inspired by OraclizeAPI's implementation - MIT licence
            // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
            if (value == 0) {
                return "0";
            }
            uint256 temp = value;
            uint256 digits;
            while (temp != 0) {
                digits++;
                temp /= 10;
            }
            bytes memory buffer = new bytes(digits);
            while (value != 0) {
                digits -= 1;
                buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
                value /= 10;
            }
            return string(buffer);
        }
        /**
         * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
         */
        function toHexString(uint256 value) internal pure returns (string memory) {
            if (value == 0) {
                return "0x00";
            }
            uint256 temp = value;
            uint256 length = 0;
            while (temp != 0) {
                length++;
                temp >>= 8;
            }
            return toHexString(value, length);
        }
        /**
         * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
         */
        function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
            bytes memory buffer = new bytes(2 * length + 2);
            buffer[0] = "0";
            buffer[1] = "x";
            for (uint256 i = 2 * length + 1; i > 1; --i) {
                buffer[i] = _HEX_SYMBOLS[value & 0xf];
                value >>= 4;
            }
            require(value == 0, "Strings: hex length insufficient");
            return string(buffer);
        }
    }
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
    pragma solidity ^0.8.0;
    /**
     * @dev Provides information about the current execution context, including the
     * sender of the transaction and its data. While these are generally available
     * via msg.sender and msg.data, they should not be accessed in such a direct
     * manner, since when dealing with meta-transactions the account sending and
     * paying for execution may not be the actual sender (as far as an application
     * is concerned).
     *
     * This contract is only required for intermediate, library-like contracts.
     */
    abstract contract Context {
        function _msgSender() internal view virtual returns (address) {
            return msg.sender;
        }
        function _msgData() internal view virtual returns (bytes calldata) {
            return msg.data;
        }
    }
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)
    pragma solidity ^0.8.1;
    /**
     * @dev Collection of functions related to the address type
     */
    library Address {
        /**
         * @dev Returns true if `account` is a contract.
         *
         * [IMPORTANT]
         * ====
         * It is unsafe to assume that an address for which this function returns
         * false is an externally-owned account (EOA) and not a contract.
         *
         * Among others, `isContract` will return false for the following
         * types of addresses:
         *
         *  - an externally-owned account
         *  - a contract in construction
         *  - an address where a contract will be created
         *  - an address where a contract lived, but was destroyed
         * ====
         *
         * [IMPORTANT]
         * ====
         * You shouldn't rely on `isContract` to protect against flash loan attacks!
         *
         * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
         * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
         * constructor.
         * ====
         */
        function isContract(address account) internal view returns (bool) {
            // This method relies on extcodesize/address.code.length, which returns 0
            // for contracts in construction, since the code is only stored at the end
            // of the constructor execution.
            return account.code.length > 0;
        }
        /**
         * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
         * `recipient`, forwarding all available gas and reverting on errors.
         *
         * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
         * of certain opcodes, possibly making contracts go over the 2300 gas limit
         * imposed by `transfer`, making them unable to receive funds via
         * `transfer`. {sendValue} removes this limitation.
         *
         * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
         *
         * IMPORTANT: because control is transferred to `recipient`, care must be
         * taken to not create reentrancy vulnerabilities. Consider using
         * {ReentrancyGuard} or the
         * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
         */
        function sendValue(address payable recipient, uint256 amount) internal {
            require(address(this).balance >= amount, "Address: insufficient balance");
            (bool success, ) = recipient.call{value: amount}("");
            require(success, "Address: unable to send value, recipient may have reverted");
        }
        /**
         * @dev Performs a Solidity function call using a low level `call`. A
         * plain `call` is an unsafe replacement for a function call: use this
         * function instead.
         *
         * If `target` reverts with a revert reason, it is bubbled up by this
         * function (like regular Solidity function calls).
         *
         * Returns the raw returned data. To convert to the expected return value,
         * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
         *
         * Requirements:
         *
         * - `target` must be a contract.
         * - calling `target` with `data` must not revert.
         *
         * _Available since v3.1._
         */
        function functionCall(address target, bytes memory data) internal returns (bytes memory) {
            return functionCall(target, data, "Address: low-level call failed");
        }
        /**
         * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
         * `errorMessage` as a fallback revert reason when `target` reverts.
         *
         * _Available since v3.1._
         */
        function functionCall(
            address target,
            bytes memory data,
            string memory errorMessage
        ) internal returns (bytes memory) {
            return functionCallWithValue(target, data, 0, errorMessage);
        }
        /**
         * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
         * but also transferring `value` wei to `target`.
         *
         * Requirements:
         *
         * - the calling contract must have an ETH balance of at least `value`.
         * - the called Solidity function must be `payable`.
         *
         * _Available since v3.1._
         */
        function functionCallWithValue(
            address target,
            bytes memory data,
            uint256 value
        ) internal returns (bytes memory) {
            return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
        }
        /**
         * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
         * with `errorMessage` as a fallback revert reason when `target` reverts.
         *
         * _Available since v3.1._
         */
        function functionCallWithValue(
            address target,
            bytes memory data,
            uint256 value,
            string memory errorMessage
        ) internal returns (bytes memory) {
            require(address(this).balance >= value, "Address: insufficient balance for call");
            require(isContract(target), "Address: call to non-contract");
            (bool success, bytes memory returndata) = target.call{value: value}(data);
            return verifyCallResult(success, returndata, errorMessage);
        }
        /**
         * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
         * but performing a static call.
         *
         * _Available since v3.3._
         */
        function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
            return functionStaticCall(target, data, "Address: low-level static call failed");
        }
        /**
         * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
         * but performing a static call.
         *
         * _Available since v3.3._
         */
        function functionStaticCall(
            address target,
            bytes memory data,
            string memory errorMessage
        ) internal view returns (bytes memory) {
            require(isContract(target), "Address: static call to non-contract");
            (bool success, bytes memory returndata) = target.staticcall(data);
            return verifyCallResult(success, returndata, errorMessage);
        }
        /**
         * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
         * but performing a delegate call.
         *
         * _Available since v3.4._
         */
        function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
            return functionDelegateCall(target, data, "Address: low-level delegate call failed");
        }
        /**
         * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
         * but performing a delegate call.
         *
         * _Available since v3.4._
         */
        function functionDelegateCall(
            address target,
            bytes memory data,
            string memory errorMessage
        ) internal returns (bytes memory) {
            require(isContract(target), "Address: delegate call to non-contract");
            (bool success, bytes memory returndata) = target.delegatecall(data);
            return verifyCallResult(success, returndata, errorMessage);
        }
        /**
         * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
         * revert reason using the provided one.
         *
         * _Available since v4.3._
         */
        function verifyCallResult(
            bool success,
            bytes memory returndata,
            string memory errorMessage
        ) internal pure returns (bytes memory) {
            if (success) {
                return returndata;
            } else {
                // Look for revert reason and bubble it up if present
                if (returndata.length > 0) {
                    // The easiest way to bubble the revert reason is using memory via assembly
                    assembly {
                        let returndata_size := mload(returndata)
                        revert(add(32, returndata), returndata_size)
                    }
                } else {
                    revert(errorMessage);
                }
            }
        }
    }
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)
    pragma solidity ^0.8.0;
    import "../IERC721.sol";
    /**
     * @title ERC-721 Non-Fungible Token Standard, optional metadata extension
     * @dev See https://eips.ethereum.org/EIPS/eip-721
     */
    interface IERC721Metadata is IERC721 {
        /**
         * @dev Returns the token collection name.
         */
        function name() external view returns (string memory);
        /**
         * @dev Returns the token collection symbol.
         */
        function symbol() external view returns (string memory);
        /**
         * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
         */
        function tokenURI(uint256 tokenId) external view returns (string memory);
    }
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol)
    pragma solidity ^0.8.0;
    /**
     * @title ERC721 token receiver interface
     * @dev Interface for any contract that wants to support safeTransfers
     * from ERC721 asset contracts.
     */
    interface IERC721Receiver {
        /**
         * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
         * by `operator` from `from`, this function is called.
         *
         * It must return its Solidity selector to confirm the token transfer.
         * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
         *
         * The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`.
         */
        function onERC721Received(
            address operator,
            address from,
            uint256 tokenId,
            bytes calldata data
        ) external returns (bytes4);
    }
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721.sol)
    pragma solidity ^0.8.0;
    import "../../utils/introspection/IERC165.sol";
    /**
     * @dev Required interface of an ERC721 compliant contract.
     */
    interface IERC721 is IERC165 {
        /**
         * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
         */
        event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
        /**
         * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
         */
        event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
        /**
         * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
         */
        event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
        /**
         * @dev Returns the number of tokens in ``owner``'s account.
         */
        function balanceOf(address owner) external view returns (uint256 balance);
        /**
         * @dev Returns the owner of the `tokenId` token.
         *
         * Requirements:
         *
         * - `tokenId` must exist.
         */
        function ownerOf(uint256 tokenId) external view returns (address owner);
        /**
         * @dev Safely transfers `tokenId` token from `from` to `to`.
         *
         * Requirements:
         *
         * - `from` cannot be the zero address.
         * - `to` cannot be the zero address.
         * - `tokenId` token must exist and be owned by `from`.
         * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
         * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
         *
         * Emits a {Transfer} event.
         */
        function safeTransferFrom(
            address from,
            address to,
            uint256 tokenId,
            bytes calldata data
        ) external;
        /**
         * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
         * are aware of the ERC721 protocol to prevent tokens from being forever locked.
         *
         * Requirements:
         *
         * - `from` cannot be the zero address.
         * - `to` cannot be the zero address.
         * - `tokenId` token must exist and be owned by `from`.
         * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
         * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
         *
         * Emits a {Transfer} event.
         */
        function safeTransferFrom(
            address from,
            address to,
            uint256 tokenId
        ) external;
        /**
         * @dev Transfers `tokenId` token from `from` to `to`.
         *
         * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
         *
         * Requirements:
         *
         * - `from` cannot be the zero address.
         * - `to` cannot be the zero address.
         * - `tokenId` token must be owned by `from`.
         * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
         *
         * Emits a {Transfer} event.
         */
        function transferFrom(
            address from,
            address to,
            uint256 tokenId
        ) external;
        /**
         * @dev Gives permission to `to` to transfer `tokenId` token to another account.
         * The approval is cleared when the token is transferred.
         *
         * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
         *
         * Requirements:
         *
         * - The caller must own the token or be an approved operator.
         * - `tokenId` must exist.
         *
         * Emits an {Approval} event.
         */
        function approve(address to, uint256 tokenId) external;
        /**
         * @dev Approve or remove `operator` as an operator for the caller.
         * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
         *
         * Requirements:
         *
         * - The `operator` cannot be the caller.
         *
         * Emits an {ApprovalForAll} event.
         */
        function setApprovalForAll(address operator, bool _approved) external;
        /**
         * @dev Returns the account approved for `tokenId` token.
         *
         * Requirements:
         *
         * - `tokenId` must exist.
         */
        function getApproved(uint256 tokenId) external view returns (address operator);
        /**
         * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
         *
         * See {setApprovalForAll}
         */
        function isApprovedForAll(address owner, address operator) external view returns (bool);
    }
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
    pragma solidity ^0.8.0;
    /**
     * @dev Interface of the ERC165 standard, as defined in the
     * https://eips.ethereum.org/EIPS/eip-165[EIP].
     *
     * Implementers can declare support of contract interfaces, which can then be
     * queried by others ({ERC165Checker}).
     *
     * For an implementation, see {ERC165}.
     */
    interface IERC165 {
        /**
         * @dev Returns true if this contract implements the interface defined by
         * `interfaceId`. See the corresponding
         * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
         * to learn more about how these ids are created.
         *
         * This function call must use less than 30 000 gas.
         */
        function supportsInterface(bytes4 interfaceId) external view returns (bool);
    }