organized_contracts/1e/1e0d605330869654324c50f57a3007b275b4f1ae720b578c4924b04a158fe0c5/contract.json

{
  "language": "Solidity",
  "sources": {
    "/contracts/AutoMinterERC721A.sol": {
      "content": "pragma solidity ^0.8.4;\r\n\r\nimport 'erc721a-upgradeable/contracts/ERC721AUpgradeable.sol';\r\nimport '@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol';\r\nimport \"@openzeppelin/contracts/utils/cryptography/ECDSA.sol\";\r\nimport \"@openzeppelin/contracts/token/ERC20/IERC20.sol\";\r\nimport \"@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol\";\r\nimport \"@openzeppelin/contracts-upgradeable/utils/StringsUpgradeable.sol\";\r\nimport \"./Base64.sol\";\r\nimport \"./IERC2981Upgradable.sol\";\r\n\r\n\r\n/**\r\n* @title ERC721A Minting Contract\r\n* @author Osaka Toni Thomas - Autominter\r\n*/\r\ncontract AutoMinterERC721A is Initializable, ERC721AUpgradeable, OwnableUpgradeable, IERC2981Upgradeable\r\n{\r\n    string private baseURI;\r\n    address constant private shareAddress = 0xE28564784a0f57554D8beEc807E8609b40A97241;\r\n    uint256 public MINT_FEE;\r\n    bool private publicMintEnabled;\r\n    \r\n    uint256 public remaining;\r\n    mapping(address => uint256) public accountMintCount;\r\n\r\n    address private whiteListSignerAddress;\r\n    uint256 public MAX_MINTS_PER_WALLET;\r\n    uint256 public royaltyBasis = 1000;\r\n    uint256 public ammountWithdrawn = 0;\r\n    string public placeholderImage;\r\n    bool public lockBaseUri;\r\n    uint256 public reserve;\r\n\r\n    constructor(){}\r\n\r\n    function initialize(string memory name_,\r\n        string memory symbol_,\r\n        string memory baseURI_,\r\n        address ownerAddress_,\r\n        uint256 mintFee_,\r\n        uint256 size_,\r\n        address whiteListSignerAddress_,\r\n        uint256 mintLimit_,\r\n        uint256 royaltyBasis_,\r\n        string memory placeholderImage_) public initializer  {\r\n\r\n        __ERC721A_init(name_, symbol_);\r\n        baseURI = baseURI_;\r\n        MINT_FEE = mintFee_;\r\n        publicMintEnabled = true;\r\n        _transferOwnership(ownerAddress_);\r\n        remaining = size_;\r\n        whiteListSignerAddress = whiteListSignerAddress_;\r\n        MAX_MINTS_PER_WALLET = mintLimit_;\r\n        royaltyBasis = royaltyBasis_;\r\n        placeholderImage = placeholderImage_;\r\n    }\r\n    \r\n    function _baseURI() internal view virtual override returns (string memory) {\r\n        return baseURI;\r\n    }\r\n    \r\n    /**\r\n     * @notice Mint a \"quantity\" of NFTs from the collection\r\n     * @dev You can mint using this function only when public mint is enabled\r\n     * @param quantity The quantity of tokens that you want to mint\r\n     */\r\n    function mint(uint256 quantity) payable public\r\n    {\r\n        require(quantity > 0, 'Quantity must be greater than zero');\r\n        require(publicMintEnabled == true, 'Public minting is not enabled for this contract yet');\r\n        require(msg.value == MINT_FEE * quantity, 'Eth sent does not match the mint fee');\r\n        \r\n        _updateUserMintCount(msg.sender, quantity, 0);\r\n\r\n        _updateMintCount(quantity);\r\n        _safeMint(msg.sender, quantity);\r\n    }\r\n    \r\n    /**\r\n     * @notice Mint tokens if you are on the access list. It is recommended to use the minting app for this\r\n     * @dev Signature and parameters must be provided by the project creator\r\n     */\r\n    function mintWithSignature(bool isFree, address to, uint256 customFee, uint256 limit, uint256 quantity, bytes calldata signature) payable public\r\n    {\r\n        require(quantity > 0, 'Quantity must be greater than zero');\r\n        require(quantity <= limit || limit == 0, 'You are not able to mint more than the allocated limit at once');\r\n\r\n        _updateUserMintCount(to, quantity, limit);\r\n\r\n        /* Hash the content (isFree, to, tokenID) and verify the signature from the owner address */\r\n        address signer = ECDSA.recover(\r\n                ECDSA.toEthSignedMessageHash(keccak256(abi.encodePacked(isFree, to, uint256(0), true, limit, customFee))),\r\n                signature);\r\n            \r\n        require(signer == owner() || signer == whiteListSignerAddress, \"The signature provided does not match\");\r\n        \r\n        /* If isFree then do not splitPayment, else splitPayment */\r\n        if(!isFree){\r\n\r\n            /* If custom fee is not provided use, mint fee */\r\n            if(customFee == 0){\r\n                require(msg.value == MINT_FEE * quantity, 'Eth sent does not match the mint fee');\r\n            }\r\n            /* If custom fee is provided use, the custom fee */\r\n            else{\r\n                require(msg.value == customFee * quantity, 'Eth sent does not match the mint fee');\r\n            }\r\n\r\n            // _splitPayment();\r\n        }\r\n        \r\n        _updateMintCount(quantity);\r\n        _safeMint(to, quantity);\r\n    }\r\n    \r\n    /**\r\n     * @notice Airdrop tokens  (ADMIN ONLY FUNCTION)\r\n     * @dev Admins can mint tokens to specific wallets \r\n     * @param to Address to mint the token too\r\n     * @param quantity The quantity of tokens that you want to airdrop\r\n     */\r\n    function airdrop(address to, uint256 quantity) onlyOwner() public\r\n    {\r\n        _updateMintCount(quantity);\r\n        _safeMint(to, quantity);\r\n    }\r\n    \r\n    /**\r\n     * @notice Airdrop tokens to multipl wallets (ADMIN ONLY FUNCTION)\r\n     * @dev Admins can mint tokens to specific wallets, use this to airdrop to multiple addresses \r\n     * @param to List of addresses to mint the token too\r\n     */\r\n    function airdrop(address[] calldata to) onlyOwner() public\r\n    {\r\n        for (uint i=0; i<to.length; i++) {\r\n            _updateMintCount(1);\r\n            _safeMint(to[i], 1);\r\n        }\r\n    }\r\n    \r\n    function _updateUserMintCount(address account, uint256 quantity, uint256 customLimit) internal {\r\n        // increment a mapping for user on how many mints they have\r\n        uint256 count = accountMintCount[account];\r\n\r\n        if(customLimit == 0){\r\n            require(count + quantity <= MAX_MINTS_PER_WALLET || MAX_MINTS_PER_WALLET == 0, \"Mint limit for this account has been exceeded\");\r\n        }\r\n        else{\r\n            require(count + quantity <= customLimit, \"Mint limit for this account has been exceeded\");\r\n        }\r\n\r\n        accountMintCount[account] = count + quantity;\r\n    }\r\n    \r\n    function _updateMintCount(uint256 quantity) internal {\r\n        require(quantity <= remaining, \"Not enough mints remaining\");\r\n        require(quantity <= remaining - reserve, \"Not enough unreserved mints available\");\r\n        remaining -= quantity;\r\n    }\r\n    \r\n    function isTokenAvailable(uint256 tokenID) external view returns (bool)\r\n    {\r\n        return !_exists(tokenID);\r\n    }\r\n\r\n    /**\r\n     * @notice Turn on or off the ability for anyone to mint (ADMIN ONLY FUNCTION)\r\n     * @dev Admins can mint tokens to specific wallets, use this to airdrop to multiple addresses \r\n     */\r\n    function togglePublicMinting() onlyOwner() public\r\n    {\r\n        publicMintEnabled = !publicMintEnabled;\r\n    }\r\n\r\n    /**\r\n     * @notice Change the default mint price (ADMIN ONLY FUNCTION)\r\n     * @dev Admins can change the mint price for the initial minting of tokens\r\n     * @param mintFee_ The price to set the mint too in WEI\r\n     */\r\n    function changeMintFee(uint256 mintFee_) onlyOwner() public\r\n    {\r\n        MINT_FEE = mintFee_;\r\n    }\r\n\r\n    /**\r\n     * @notice Change the max mints per wallet (ADMIN ONLY FUNCTION)\r\n     * @dev Admins can change the max number of mints per wallet (0 = unlimitted)\r\n     * @param mintLimit_ The maximum number of mints per wallet\r\n     */\r\n    function changeMintLimit(uint256 mintLimit_) onlyOwner() public\r\n    {\r\n        MAX_MINTS_PER_WALLET = mintLimit_;\r\n    }\r\n\r\n\r\n    /**\r\n     * @notice Change the number of reserved NFTs (ADMIN ONLY FUNCTION)\r\n     * @dev Admins can change the number of NFTs which cannot be minted and will be reserved\r\n     * @param ammount The number of tokens to reserve\r\n     */\r\n    function updateReserveAmmount(uint256 ammount) onlyOwner() public\r\n    {\r\n        require(ammount <= remaining, \"Reserve ammount must be less than remaining quantity\");\r\n        reserve = ammount;\r\n    }\r\n\r\n    /**\r\n     * @notice Change the image for delayed reveal (ADMIN ONLY FUNCTION)\r\n     * @dev Admins can change the delayed reveal image, only if the artwork has not been revealed yet\r\n     * @param placeholderImage_ the uri of the image to use\r\n     */\r\n    function changePlaceholderImage(string memory placeholderImage_) onlyOwner() public\r\n    {\r\n        require(bytes(placeholderImage).length != 0, \"Metadata has already been revealed\");\r\n        require(bytes(placeholderImage_).length != 0, \"Placeholder image cannot be empty\");\r\n\r\n        placeholderImage = placeholderImage_;\r\n    }\r\n\r\n    function royaltyInfo(uint _tokenId, uint _salePrice) external view returns (address receiver, uint royaltyAmount) {\r\n        return (address(this), uint((_salePrice * royaltyBasis)/10000));\r\n    }\r\n    \r\n\r\n    /**\r\n     * @notice Transfer the balance of in contract (ADMIN ONLY FUNCTION)\r\n     * @dev Admins can transfer the balance in the contract\r\n     * @param to the address to send funds too\r\n     * @param ammount the ammount to transfer in WEI ((Make equal to balance)\r\n     */\r\n    function transferBalance(address payable to, uint256 ammount) onlyOwner() public{\r\n        \r\n        if(address(this).balance != 0){\r\n            require(address(this).balance <= ammount, \"Not enought Balance to Transfer\");\r\n\r\n            uint256 splitValue = ammount / 10;\r\n            uint256 remainingValue = ammount - splitValue;\r\n            \r\n            payable(shareAddress).transfer(splitValue);\r\n            payable(to).transfer(remainingValue);\r\n            ammountWithdrawn += ammount;\r\n        }\r\n    }\r\n    \r\n    /**\r\n     * @notice Transfer ERC20  balance of in contract (ADMIN ONLY FUNCTION)\r\n     * @dev Admins can transfer the balance in the contract\r\n     * @param erc20ContractAddress the address of the ERC20 token which is held and should be transfered\r\n     * @param to the address to send\r\n     * @param ammount the ammount to transfer in the base unit of the ERC20 token\r\n     */\r\n    function transferERC20Balance(address erc20ContractAddress, address payable to, uint256 ammount) onlyOwner() public{\r\n        uint256 splitValue = ammount / 10;\r\n        uint256 remainingValue = ammount - splitValue;\r\n\r\n        IERC20(erc20ContractAddress).transfer(shareAddress, splitValue);\r\n        IERC20(erc20ContractAddress).transfer(to, remainingValue);\r\n    }\r\n    \r\n    function contractURI() public view returns (string memory) {\r\n        return string(abi.encodePacked(\r\n            \"data:application/json;base64,\",\r\n            Base64.encode(\r\n                bytes(\r\n                    string(abi.encodePacked('{\"name\":\"', name(), '\",\"seller_fee_basis_points\":', Strings.toString(royaltyBasis), ',\"fee_recipient\":\"', \"0x\", toAsciiString(address(this)), '\"}' ))\r\n                )\r\n            )\r\n        ));\r\n    }\r\n\r\n    function toAsciiString(address x) internal pure returns (string memory) {\r\n        bytes memory s = new bytes(40);\r\n        for (uint i = 0; i < 20; i++) {\r\n            bytes1 b = bytes1(uint8(uint(uint160(x)) / (2**(8*(19 - i)))));\r\n            bytes1 hi = bytes1(uint8(b) / 16);\r\n            bytes1 lo = bytes1(uint8(b) - 16 * uint8(hi));\r\n            s[2*i] = char(hi);\r\n            s[2*i+1] = char(lo);            \r\n        }\r\n        return string(s);\r\n    }\r\n\r\n    function char(bytes1 b) internal pure returns (bytes1 c) {\r\n        if (uint8(b) < 10) return bytes1(uint8(b) + 0x30);\r\n        else return bytes1(uint8(b) + 0x57);\r\n    }\r\n\r\n    /**\r\n     * @dev See {IERC165-supportsInterface}.\r\n     */\r\n    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC721AUpgradeable, IERC165Upgradeable) returns (bool) {\r\n        return\r\n            interfaceId == type(IERC721AUpgradeable).interfaceId ||\r\n            // interfaceId == type(IERC721AMetadataUpgradeable).interfaceId ||\r\n            interfaceId == type(IERC2981Upgradeable).interfaceId ||\r\n            super.supportsInterface(interfaceId);\r\n    }\r\n\r\n    function IS_PUBLIC_MINTING_OPEN() external view returns (bool){\r\n        return publicMintEnabled;\r\n    }\r\n    \r\n    /**\r\n     * @dev See {IERC721Metadata-tokenURI}.\r\n     */\r\n    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {\r\n        require(_exists(tokenId), \"ERC721Metadata: URI query for nonexistent token\");\r\n\r\n        string memory baseURI = _baseURI();\r\n\r\n        if(bytes(placeholderImage).length > 0){\r\n            return placeholderImage;\r\n        }\r\n        else{\r\n            return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, Strings.toString(tokenId))) : \"\";\r\n        }\r\n\r\n    }\r\n\r\n    /**\r\n     * @notice Reveal the artwork (ADMIN ONLY FUNCTION)\r\n     * @dev Reveal the artwork if you have delayed reveal on\r\n     */\r\n    function reveal() onlyOwner() public {\r\n        placeholderImage = \"\";\r\n    }\r\n\r\n    /**\r\n     * @notice Change the base URI for the artwork and metadata (ADMIN ONLY FUNCTION)\r\n     * @dev You can change the base tokenURI if you have not locked the base uri from being updated\r\n     * @param baseURI_ URI of the collection\r\n     */\r\n    function changeBaseUri(string memory baseURI_) onlyOwner() public {\r\n        require(!lockBaseUri, \"Base URI is locked, it cannot be edited\");\r\n\r\n        baseURI = baseURI_;\r\n    }\r\n\r\n    /**\r\n     * @notice Permenantly lock the base URI so the artwork can never be changed (ADMIN ONLY FUNCTION)\r\n     * @dev Lock the base uri so that it is permenant and cannot be changed in the future ever\r\n     */\r\n    function permanentlyLockBaseUri() onlyOwner() public {\r\n        lockBaseUri = true;\r\n    }\r\n\r\n    function getMintsUsed(address account) external view returns (uint256) {\r\n        return accountMintCount[account];\r\n    }\r\n    \r\n    function version() external pure returns (string memory)\r\n    {\r\n        return \"2.0.0\";\r\n    }\r\n\r\n    receive() external payable {}\r\n}\r\n"
    },
    "/contracts/IERC2981Upgradable.sol": {
      "content": "// SPDX-License-Identifier: UNLICENSED\r\n\r\nimport \"@openzeppelin/contracts-upgradeable/utils/introspection/ERC165Upgradeable.sol\";\r\n\r\npragma solidity >=0.7.0 <0.9.0;\r\n// import \"@openzeppelin/contracts-upgradeable/interfaces/IERC2981Upgradeable.sol\";\r\n/**\r\n * @dev Interface for the NFT Royalty Standard\r\n */\r\ninterface IERC2981Upgradeable is IERC165Upgradeable {\r\n    /**\r\n     * @dev Called with the sale price to determine how much royalty is owed and to whom.\r\n     * @param tokenId - the NFT asset queried for royalty information\r\n     * @param salePrice - the sale price of the NFT asset specified by `tokenId`\r\n     * @return receiver - address of who should be sent the royalty payment\r\n     * @return royaltyAmount - the royalty payment amount for `salePrice`\r\n     */\r\n    function royaltyInfo(uint256 tokenId, uint256 salePrice)\r\n        external\r\n        view\r\n        returns (address receiver, uint256 royaltyAmount);\r\n}\r\n"
    },
    "/contracts/Base64.sol": {
      "content": "// SPDX-License-Identifier: MIT\r\npragma solidity ^0.8.0;\r\n\r\n/// @title Base64\r\n/// @author Brecht Devos - <brecht@loopring.org>\r\n/// @notice Provides a function for encoding some bytes in base64\r\nlibrary Base64 {\r\n    string internal constant TABLE =\r\n        \"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/\";\r\n\r\n    function encode(bytes memory data) internal pure returns (string memory) {\r\n        if (data.length == 0) return \"\";\r\n\r\n        // load the table into memory\r\n        string memory table = TABLE;\r\n\r\n        // multiply by 4/3 rounded up\r\n        uint256 encodedLen = 4 * ((data.length + 2) / 3);\r\n\r\n        // add some extra buffer at the end required for the writing\r\n        string memory result = new string(encodedLen + 32);\r\n\r\n        assembly {\r\n            // set the actual output length\r\n            mstore(result, encodedLen)\r\n\r\n            // prepare the lookup table\r\n            let tablePtr := add(table, 1)\r\n\r\n            // input ptr\r\n            let dataPtr := data\r\n            let endPtr := add(dataPtr, mload(data))\r\n\r\n            // result ptr, jump over length\r\n            let resultPtr := add(result, 32)\r\n\r\n            // run over the input, 3 bytes at a time\r\n            for {\r\n\r\n            } lt(dataPtr, endPtr) {\r\n\r\n            } {\r\n                dataPtr := add(dataPtr, 3)\r\n\r\n                // read 3 bytes\r\n                let input := mload(dataPtr)\r\n\r\n                // write 4 characters\r\n                mstore(\r\n                    resultPtr,\r\n                    shl(248, mload(add(tablePtr, and(shr(18, input), 0x3F))))\r\n                )\r\n                resultPtr := add(resultPtr, 1)\r\n                mstore(\r\n                    resultPtr,\r\n                    shl(248, mload(add(tablePtr, and(shr(12, input), 0x3F))))\r\n                )\r\n                resultPtr := add(resultPtr, 1)\r\n                mstore(\r\n                    resultPtr,\r\n                    shl(248, mload(add(tablePtr, and(shr(6, input), 0x3F))))\r\n                )\r\n                resultPtr := add(resultPtr, 1)\r\n                mstore(\r\n                    resultPtr,\r\n                    shl(248, mload(add(tablePtr, and(input, 0x3F))))\r\n                )\r\n                resultPtr := add(resultPtr, 1)\r\n            }\r\n\r\n            // padding with '='\r\n            switch mod(mload(data), 3)\r\n            case 1 {\r\n                mstore(sub(resultPtr, 2), shl(240, 0x3d3d))\r\n            }\r\n            case 2 {\r\n                mstore(sub(resultPtr, 1), shl(248, 0x3d))\r\n            }\r\n        }\r\n\r\n        return result;\r\n    }\r\n}"
    },
    "erc721a-upgradeable/contracts/IERC721AUpgradeable.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// ERC721A Contracts v3.3.0\n// Creator: Chiru Labs\n\npragma solidity ^0.8.4;\n\nimport \"@openzeppelin/contracts-upgradeable/token/ERC721/IERC721Upgradeable.sol\";\nimport \"@openzeppelin/contracts-upgradeable/token/ERC721/extensions/IERC721MetadataUpgradeable.sol\";\n\n/**\n * @dev Interface of an ERC721A compliant contract.\n */\ninterface IERC721AUpgradeable is IERC721Upgradeable, IERC721MetadataUpgradeable {\n    /**\n     * The caller must own the token or be an approved operator.\n     */\n    error ApprovalCallerNotOwnerNorApproved();\n\n    /**\n     * The token does not exist.\n     */\n    error ApprovalQueryForNonexistentToken();\n\n    /**\n     * The caller cannot approve to their own address.\n     */\n    error ApproveToCaller();\n\n    /**\n     * The caller cannot approve to the current owner.\n     */\n    error ApprovalToCurrentOwner();\n\n    /**\n     * Cannot query the balance for the zero address.\n     */\n    error BalanceQueryForZeroAddress();\n\n    /**\n     * Cannot mint to the zero address.\n     */\n    error MintToZeroAddress();\n\n    /**\n     * The quantity of tokens minted must be more than zero.\n     */\n    error MintZeroQuantity();\n\n    /**\n     * The token does not exist.\n     */\n    error OwnerQueryForNonexistentToken();\n\n    /**\n     * The caller must own the token or be an approved operator.\n     */\n    error TransferCallerNotOwnerNorApproved();\n\n    /**\n     * The token must be owned by `from`.\n     */\n    error TransferFromIncorrectOwner();\n\n    /**\n     * Cannot safely transfer to a contract that does not implement the ERC721Receiver interface.\n     */\n    error TransferToNonERC721ReceiverImplementer();\n\n    /**\n     * Cannot transfer to the zero address.\n     */\n    error TransferToZeroAddress();\n\n    /**\n     * The token does not exist.\n     */\n    error URIQueryForNonexistentToken();\n\n    // Compiler will pack this into a single 256bit word.\n    struct TokenOwnership {\n        // The address of the owner.\n        address addr;\n        // Keeps track of the start time of ownership with minimal overhead for tokenomics.\n        uint64 startTimestamp;\n        // Whether the token has been burned.\n        bool burned;\n    }\n\n    // Compiler will pack this into a single 256bit word.\n    struct AddressData {\n        // Realistically, 2**64-1 is more than enough.\n        uint64 balance;\n        // Keeps track of mint count with minimal overhead for tokenomics.\n        uint64 numberMinted;\n        // Keeps track of burn count with minimal overhead for tokenomics.\n        uint64 numberBurned;\n        // For miscellaneous variable(s) pertaining to the address\n        // (e.g. number of whitelist mint slots used).\n        // If there are multiple variables, please pack them into a uint64.\n        uint64 aux;\n    }\n\n    /**\n     * @dev Returns the total amount of tokens stored by the contract.\n     * \n     * Burned tokens are calculated here, use `_totalMinted()` if you want to count just minted tokens.\n     */\n    function totalSupply() external view returns (uint256);\n}\n"
    },
    "erc721a-upgradeable/contracts/ERC721AUpgradeable.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// ERC721A Contracts v3.3.0\n// Creator: Chiru Labs\n\npragma solidity ^0.8.4;\n\nimport \"./IERC721AUpgradeable.sol\";\nimport \"@openzeppelin/contracts-upgradeable/token/ERC721/IERC721ReceiverUpgradeable.sol\";\nimport \"@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol\";\nimport \"@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol\";\nimport \"@openzeppelin/contracts-upgradeable/utils/StringsUpgradeable.sol\";\nimport \"@openzeppelin/contracts-upgradeable/utils/introspection/ERC165Upgradeable.sol\";\nimport \"@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol\";\n\n/**\n * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including\n * the Metadata extension. Built to optimize for lower gas during batch mints.\n *\n * Assumes serials are sequentially minted starting at _startTokenId() (defaults to 0, e.g. 0, 1, 2, 3..).\n *\n * Assumes that an owner cannot have more than 2**64 - 1 (max value of uint64) of supply.\n *\n * Assumes that the maximum token id cannot exceed 2**256 - 1 (max value of uint256).\n */\ncontract ERC721AUpgradeable is Initializable, ContextUpgradeable, ERC165Upgradeable, IERC721AUpgradeable {\n    using AddressUpgradeable for address;\n    using StringsUpgradeable for uint256;\n\n    // The tokenId of the next token to be minted.\n    uint256 internal _currentIndex;\n\n    // The number of tokens burned.\n    uint256 internal _burnCounter;\n\n    // Token name\n    string private _name;\n\n    // Token symbol\n    string private _symbol;\n\n    // Mapping from token ID to ownership details\n    // An empty struct value does not necessarily mean the token is unowned. See _ownershipOf implementation for details.\n    mapping(uint256 => TokenOwnership) internal _ownerships;\n\n    // Mapping owner address to address data\n    mapping(address => AddressData) private _addressData;\n\n    // Mapping from token ID to approved address\n    mapping(uint256 => address) private _tokenApprovals;\n\n    // Mapping from owner to operator approvals\n    mapping(address => mapping(address => bool)) private _operatorApprovals;\n\n    function __ERC721A_init(string memory name_, string memory symbol_) internal onlyInitializing {\n        __ERC721A_init_unchained(name_, symbol_);\n    }\n\n    function __ERC721A_init_unchained(string memory name_, string memory symbol_) internal onlyInitializing {\n        _name = name_;\n        _symbol = symbol_;\n        _currentIndex = _startTokenId();\n    }\n\n    /**\n     * To change the starting tokenId, please override this function.\n     */\n    function _startTokenId() internal view virtual returns (uint256) {\n        return 0;\n    }\n\n    /**\n     * @dev Burned tokens are calculated here, use _totalMinted() if you want to count just minted tokens.\n     */\n    function totalSupply() public view override returns (uint256) {\n        // Counter underflow is impossible as _burnCounter cannot be incremented\n        // more than _currentIndex - _startTokenId() times\n        unchecked {\n            return _currentIndex - _burnCounter - _startTokenId();\n        }\n    }\n\n    /**\n     * Returns the total amount of tokens minted in the contract.\n     */\n    function _totalMinted() internal view returns (uint256) {\n        // Counter underflow is impossible as _currentIndex does not decrement,\n        // and it is initialized to _startTokenId()\n        unchecked {\n            return _currentIndex - _startTokenId();\n        }\n    }\n\n    /**\n     * @dev See {IERC165-supportsInterface}.\n     */\n    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165Upgradeable, IERC165Upgradeable) returns (bool) {\n        return\n            interfaceId == type(IERC721Upgradeable).interfaceId ||\n            interfaceId == type(IERC721MetadataUpgradeable).interfaceId ||\n            super.supportsInterface(interfaceId);\n    }\n\n    /**\n     * @dev See {IERC721-balanceOf}.\n     */\n    function balanceOf(address owner) public view override returns (uint256) {\n        if (owner == address(0)) revert BalanceQueryForZeroAddress();\n        return uint256(_addressData[owner].balance);\n    }\n\n    /**\n     * Returns the number of tokens minted by `owner`.\n     */\n    function _numberMinted(address owner) internal view returns (uint256) {\n        return uint256(_addressData[owner].numberMinted);\n    }\n\n    /**\n     * Returns the number of tokens burned by or on behalf of `owner`.\n     */\n    function _numberBurned(address owner) internal view returns (uint256) {\n        return uint256(_addressData[owner].numberBurned);\n    }\n\n    /**\n     * Returns the auxillary data for `owner`. (e.g. number of whitelist mint slots used).\n     */\n    function _getAux(address owner) internal view returns (uint64) {\n        return _addressData[owner].aux;\n    }\n\n    /**\n     * Sets the auxillary data for `owner`. (e.g. number of whitelist mint slots used).\n     * If there are multiple variables, please pack them into a uint64.\n     */\n    function _setAux(address owner, uint64 aux) internal {\n        _addressData[owner].aux = aux;\n    }\n\n    /**\n     * Gas spent here starts off proportional to the maximum mint batch size.\n     * It gradually moves to O(1) as tokens get transferred around in the collection over time.\n     */\n    function _ownershipOf(uint256 tokenId) internal view returns (TokenOwnership memory) {\n        uint256 curr = tokenId;\n\n        unchecked {\n            if (_startTokenId() <= curr) if (curr < _currentIndex) {\n                TokenOwnership memory ownership = _ownerships[curr];\n                if (!ownership.burned) {\n                    if (ownership.addr != address(0)) {\n                        return ownership;\n                    }\n                    // Invariant:\n                    // There will always be an ownership that has an address and is not burned\n                    // before an ownership that does not have an address and is not burned.\n                    // Hence, curr will not underflow.\n                    while (true) {\n                        curr--;\n                        ownership = _ownerships[curr];\n                        if (ownership.addr != address(0)) {\n                            return ownership;\n                        }\n                    }\n                }\n            }\n        }\n        revert OwnerQueryForNonexistentToken();\n    }\n\n    /**\n     * @dev See {IERC721-ownerOf}.\n     */\n    function ownerOf(uint256 tokenId) public view override returns (address) {\n        return _ownershipOf(tokenId).addr;\n    }\n\n    /**\n     * @dev See {IERC721Metadata-name}.\n     */\n    function name() public view virtual override returns (string memory) {\n        return _name;\n    }\n\n    /**\n     * @dev See {IERC721Metadata-symbol}.\n     */\n    function symbol() public view virtual override returns (string memory) {\n        return _symbol;\n    }\n\n    /**\n     * @dev See {IERC721Metadata-tokenURI}.\n     */\n    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {\n        if (!_exists(tokenId)) revert URIQueryForNonexistentToken();\n\n        string memory baseURI = _baseURI();\n        return bytes(baseURI).length != 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : '';\n    }\n\n    /**\n     * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each\n     * token will be the concatenation of the `baseURI` and the `tokenId`. Empty\n     * by default, can be overriden in child contracts.\n     */\n    function _baseURI() internal view virtual returns (string memory) {\n        return '';\n    }\n\n    /**\n     * @dev See {IERC721-approve}.\n     */\n    function approve(address to, uint256 tokenId) public override {\n        address owner = ERC721AUpgradeable.ownerOf(tokenId);\n        if (to == owner) revert ApprovalToCurrentOwner();\n\n        if (_msgSender() != owner) if(!isApprovedForAll(owner, _msgSender())) {\n            revert ApprovalCallerNotOwnerNorApproved();\n        }\n\n        _approve(to, tokenId, owner);\n    }\n\n    /**\n     * @dev See {IERC721-getApproved}.\n     */\n    function getApproved(uint256 tokenId) public view override returns (address) {\n        if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken();\n\n        return _tokenApprovals[tokenId];\n    }\n\n    /**\n     * @dev See {IERC721-setApprovalForAll}.\n     */\n    function setApprovalForAll(address operator, bool approved) public virtual override {\n        if (operator == _msgSender()) revert ApproveToCaller();\n\n        _operatorApprovals[_msgSender()][operator] = approved;\n        emit ApprovalForAll(_msgSender(), operator, approved);\n    }\n\n    /**\n     * @dev See {IERC721-isApprovedForAll}.\n     */\n    function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {\n        return _operatorApprovals[owner][operator];\n    }\n\n    /**\n     * @dev See {IERC721-transferFrom}.\n     */\n    function transferFrom(\n        address from,\n        address to,\n        uint256 tokenId\n    ) public virtual override {\n        _transfer(from, to, tokenId);\n    }\n\n    /**\n     * @dev See {IERC721-safeTransferFrom}.\n     */\n    function safeTransferFrom(\n        address from,\n        address to,\n        uint256 tokenId\n    ) public virtual override {\n        safeTransferFrom(from, to, tokenId, '');\n    }\n\n    /**\n     * @dev See {IERC721-safeTransferFrom}.\n     */\n    function safeTransferFrom(\n        address from,\n        address to,\n        uint256 tokenId,\n        bytes memory _data\n    ) public virtual override {\n        _transfer(from, to, tokenId);\n        if (to.isContract()) if(!_checkContractOnERC721Received(from, to, tokenId, _data)) {\n            revert TransferToNonERC721ReceiverImplementer();\n        }\n    }\n\n    /**\n     * @dev Returns whether `tokenId` exists.\n     *\n     * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.\n     *\n     * Tokens start existing when they are minted (`_mint`),\n     */\n    function _exists(uint256 tokenId) internal view returns (bool) {\n        return _startTokenId() <= tokenId && tokenId < _currentIndex && !_ownerships[tokenId].burned;\n    }\n\n    /**\n     * @dev Equivalent to `_safeMint(to, quantity, '')`.\n     */\n    function _safeMint(address to, uint256 quantity) internal {\n        _safeMint(to, quantity, '');\n    }\n\n    /**\n     * @dev Safely mints `quantity` tokens and transfers them to `to`.\n     *\n     * Requirements:\n     *\n     * - If `to` refers to a smart contract, it must implement\n     *   {IERC721Receiver-onERC721Received}, which is called for each safe transfer.\n     * - `quantity` must be greater than 0.\n     *\n     * Emits a {Transfer} event.\n     */\n    function _safeMint(\n        address to,\n        uint256 quantity,\n        bytes memory _data\n    ) internal {\n        uint256 startTokenId = _currentIndex;\n        if (to == address(0)) revert MintToZeroAddress();\n        if (quantity == 0) revert MintZeroQuantity();\n\n        _beforeTokenTransfers(address(0), to, startTokenId, quantity);\n\n        // Overflows are incredibly unrealistic.\n        // balance or numberMinted overflow if current value of either + quantity > 1.8e19 (2**64) - 1\n        // updatedIndex overflows if _currentIndex + quantity > 1.2e77 (2**256) - 1\n        unchecked {\n            _addressData[to].balance += uint64(quantity);\n            _addressData[to].numberMinted += uint64(quantity);\n\n            _ownerships[startTokenId].addr = to;\n            _ownerships[startTokenId].startTimestamp = uint64(block.timestamp);\n\n            uint256 updatedIndex = startTokenId;\n            uint256 end = updatedIndex + quantity;\n\n            if (to.isContract()) {\n                do {\n                    emit Transfer(address(0), to, updatedIndex);\n                    if (!_checkContractOnERC721Received(address(0), to, updatedIndex++, _data)) {\n                        revert TransferToNonERC721ReceiverImplementer();\n                    }\n                } while (updatedIndex < end);\n                // Reentrancy protection\n                if (_currentIndex != startTokenId) revert();\n            } else {\n                do {\n                    emit Transfer(address(0), to, updatedIndex++);\n                } while (updatedIndex < end);\n            }\n            _currentIndex = updatedIndex;\n        }\n        _afterTokenTransfers(address(0), to, startTokenId, quantity);\n    }\n\n    /**\n     * @dev Mints `quantity` tokens and transfers them to `to`.\n     *\n     * Requirements:\n     *\n     * - `to` cannot be the zero address.\n     * - `quantity` must be greater than 0.\n     *\n     * Emits a {Transfer} event.\n     */\n    function _mint(address to, uint256 quantity) internal {\n        uint256 startTokenId = _currentIndex;\n        if (to == address(0)) revert MintToZeroAddress();\n        if (quantity == 0) revert MintZeroQuantity();\n\n        _beforeTokenTransfers(address(0), to, startTokenId, quantity);\n\n        // Overflows are incredibly unrealistic.\n        // balance or numberMinted overflow if current value of either + quantity > 1.8e19 (2**64) - 1\n        // updatedIndex overflows if _currentIndex + quantity > 1.2e77 (2**256) - 1\n        unchecked {\n            _addressData[to].balance += uint64(quantity);\n            _addressData[to].numberMinted += uint64(quantity);\n\n            _ownerships[startTokenId].addr = to;\n            _ownerships[startTokenId].startTimestamp = uint64(block.timestamp);\n\n            uint256 updatedIndex = startTokenId;\n            uint256 end = updatedIndex + quantity;\n\n            do {\n                emit Transfer(address(0), to, updatedIndex++);\n            } while (updatedIndex < end);\n\n            _currentIndex = updatedIndex;\n        }\n        _afterTokenTransfers(address(0), to, startTokenId, quantity);\n    }\n\n    /**\n     * @dev Transfers `tokenId` from `from` to `to`.\n     *\n     * Requirements:\n     *\n     * - `to` cannot be the zero address.\n     * - `tokenId` token must be owned by `from`.\n     *\n     * Emits a {Transfer} event.\n     */\n    function _transfer(\n        address from,\n        address to,\n        uint256 tokenId\n    ) private {\n        TokenOwnership memory prevOwnership = _ownershipOf(tokenId);\n\n        if (prevOwnership.addr != from) revert TransferFromIncorrectOwner();\n\n        bool isApprovedOrOwner = (_msgSender() == from ||\n            isApprovedForAll(from, _msgSender()) ||\n            getApproved(tokenId) == _msgSender());\n\n        if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();\n        if (to == address(0)) revert TransferToZeroAddress();\n\n        _beforeTokenTransfers(from, to, tokenId, 1);\n\n        // Clear approvals from the previous owner\n        _approve(address(0), tokenId, from);\n\n        // Underflow of the sender's balance is impossible because we check for\n        // ownership above and the recipient's balance can't realistically overflow.\n        // Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.\n        unchecked {\n            _addressData[from].balance -= 1;\n            _addressData[to].balance += 1;\n\n            TokenOwnership storage currSlot = _ownerships[tokenId];\n            currSlot.addr = to;\n            currSlot.startTimestamp = uint64(block.timestamp);\n\n            // If the ownership slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it.\n            // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.\n            uint256 nextTokenId = tokenId + 1;\n            TokenOwnership storage nextSlot = _ownerships[nextTokenId];\n            if (nextSlot.addr == address(0)) {\n                // This will suffice for checking _exists(nextTokenId),\n                // as a burned slot cannot contain the zero address.\n                if (nextTokenId != _currentIndex) {\n                    nextSlot.addr = from;\n                    nextSlot.startTimestamp = prevOwnership.startTimestamp;\n                }\n            }\n        }\n\n        emit Transfer(from, to, tokenId);\n        _afterTokenTransfers(from, to, tokenId, 1);\n    }\n\n    /**\n     * @dev Equivalent to `_burn(tokenId, false)`.\n     */\n    function _burn(uint256 tokenId) internal virtual {\n        _burn(tokenId, false);\n    }\n\n    /**\n     * @dev Destroys `tokenId`.\n     * The approval is cleared when the token is burned.\n     *\n     * Requirements:\n     *\n     * - `tokenId` must exist.\n     *\n     * Emits a {Transfer} event.\n     */\n    function _burn(uint256 tokenId, bool approvalCheck) internal virtual {\n        TokenOwnership memory prevOwnership = _ownershipOf(tokenId);\n\n        address from = prevOwnership.addr;\n\n        if (approvalCheck) {\n            bool isApprovedOrOwner = (_msgSender() == from ||\n                isApprovedForAll(from, _msgSender()) ||\n                getApproved(tokenId) == _msgSender());\n\n            if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();\n        }\n\n        _beforeTokenTransfers(from, address(0), tokenId, 1);\n\n        // Clear approvals from the previous owner\n        _approve(address(0), tokenId, from);\n\n        // Underflow of the sender's balance is impossible because we check for\n        // ownership above and the recipient's balance can't realistically overflow.\n        // Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.\n        unchecked {\n            AddressData storage addressData = _addressData[from];\n            addressData.balance -= 1;\n            addressData.numberBurned += 1;\n\n            // Keep track of who burned the token, and the timestamp of burning.\n            TokenOwnership storage currSlot = _ownerships[tokenId];\n            currSlot.addr = from;\n            currSlot.startTimestamp = uint64(block.timestamp);\n            currSlot.burned = true;\n\n            // If the ownership slot of tokenId+1 is not explicitly set, that means the burn initiator owns it.\n            // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.\n            uint256 nextTokenId = tokenId + 1;\n            TokenOwnership storage nextSlot = _ownerships[nextTokenId];\n            if (nextSlot.addr == address(0)) {\n                // This will suffice for checking _exists(nextTokenId),\n                // as a burned slot cannot contain the zero address.\n                if (nextTokenId != _currentIndex) {\n                    nextSlot.addr = from;\n                    nextSlot.startTimestamp = prevOwnership.startTimestamp;\n                }\n            }\n        }\n\n        emit Transfer(from, address(0), tokenId);\n        _afterTokenTransfers(from, address(0), tokenId, 1);\n\n        // Overflow not possible, as _burnCounter cannot be exceed _currentIndex times.\n        unchecked {\n            _burnCounter++;\n        }\n    }\n\n    /**\n     * @dev Approve `to` to operate on `tokenId`\n     *\n     * Emits a {Approval} event.\n     */\n    function _approve(\n        address to,\n        uint256 tokenId,\n        address owner\n    ) private {\n        _tokenApprovals[tokenId] = to;\n        emit Approval(owner, to, tokenId);\n    }\n\n    /**\n     * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target contract.\n     *\n     * @param from address representing the previous owner of the given token ID\n     * @param to target address that will receive the tokens\n     * @param tokenId uint256 ID of the token to be transferred\n     * @param _data bytes optional data to send along with the call\n     * @return bool whether the call correctly returned the expected magic value\n     */\n    function _checkContractOnERC721Received(\n        address from,\n        address to,\n        uint256 tokenId,\n        bytes memory _data\n    ) private returns (bool) {\n        try IERC721ReceiverUpgradeable(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {\n            return retval == IERC721ReceiverUpgradeable(to).onERC721Received.selector;\n        } catch (bytes memory reason) {\n            if (reason.length == 0) {\n                revert TransferToNonERC721ReceiverImplementer();\n            } else {\n                assembly {\n                    revert(add(32, reason), mload(reason))\n                }\n            }\n        }\n    }\n\n    /**\n     * @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting.\n     * And also called before burning one token.\n     *\n     * startTokenId - the first token id to be transferred\n     * quantity - the amount to be transferred\n     *\n     * Calling conditions:\n     *\n     * - When `from` and `to` are both non-zero, `from`'s `tokenId` will be\n     * transferred to `to`.\n     * - When `from` is zero, `tokenId` will be minted for `to`.\n     * - When `to` is zero, `tokenId` will be burned by `from`.\n     * - `from` and `to` are never both zero.\n     */\n    function _beforeTokenTransfers(\n        address from,\n        address to,\n        uint256 startTokenId,\n        uint256 quantity\n    ) internal virtual {}\n\n    /**\n     * @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes\n     * minting.\n     * And also called after one token has been burned.\n     *\n     * startTokenId - the first token id to be transferred\n     * quantity - the amount to be transferred\n     *\n     * Calling conditions:\n     *\n     * - When `from` and `to` are both non-zero, `from`'s `tokenId` has been\n     * transferred to `to`.\n     * - When `from` is zero, `tokenId` has been minted for `to`.\n     * - When `to` is zero, `tokenId` has been burned by `from`.\n     * - `from` and `to` are never both zero.\n     */\n    function _afterTokenTransfers(\n        address from,\n        address to,\n        uint256 startTokenId,\n        uint256 quantity\n    ) internal virtual {}\n\n    /**\n     * @dev This empty reserved space is put in place to allow future versions to add new\n     * variables without shifting down storage in the inheritance chain.\n     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n     */\n    uint256[42] private __gap;\n}\n"
    },
    "@openzeppelin/contracts/utils/cryptography/ECDSA.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/cryptography/ECDSA.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../Strings.sol\";\n\n/**\n * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.\n *\n * These functions can be used to verify that a message was signed by the holder\n * of the private keys of a given address.\n */\nlibrary ECDSA {\n    enum RecoverError {\n        NoError,\n        InvalidSignature,\n        InvalidSignatureLength,\n        InvalidSignatureS,\n        InvalidSignatureV\n    }\n\n    function _throwError(RecoverError error) private pure {\n        if (error == RecoverError.NoError) {\n            return; // no error: do nothing\n        } else if (error == RecoverError.InvalidSignature) {\n            revert(\"ECDSA: invalid signature\");\n        } else if (error == RecoverError.InvalidSignatureLength) {\n            revert(\"ECDSA: invalid signature length\");\n        } else if (error == RecoverError.InvalidSignatureS) {\n            revert(\"ECDSA: invalid signature 's' value\");\n        } else if (error == RecoverError.InvalidSignatureV) {\n            revert(\"ECDSA: invalid signature 'v' value\");\n        }\n    }\n\n    /**\n     * @dev Returns the address that signed a hashed message (`hash`) with\n     * `signature` or error string. This address can then be used for verification purposes.\n     *\n     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:\n     * this function rejects them by requiring the `s` value to be in the lower\n     * half order, and the `v` value to be either 27 or 28.\n     *\n     * IMPORTANT: `hash` _must_ be the result of a hash operation for the\n     * verification to be secure: it is possible to craft signatures that\n     * recover to arbitrary addresses for non-hashed data. A safe way to ensure\n     * this is by receiving a hash of the original message (which may otherwise\n     * be too long), and then calling {toEthSignedMessageHash} on it.\n     *\n     * Documentation for signature generation:\n     * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]\n     * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]\n     *\n     * _Available since v4.3._\n     */\n    function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {\n        // Check the signature length\n        // - case 65: r,s,v signature (standard)\n        // - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._\n        if (signature.length == 65) {\n            bytes32 r;\n            bytes32 s;\n            uint8 v;\n            // ecrecover takes the signature parameters, and the only way to get them\n            // currently is to use assembly.\n            assembly {\n                r := mload(add(signature, 0x20))\n                s := mload(add(signature, 0x40))\n                v := byte(0, mload(add(signature, 0x60)))\n            }\n            return tryRecover(hash, v, r, s);\n        } else if (signature.length == 64) {\n            bytes32 r;\n            bytes32 vs;\n            // ecrecover takes the signature parameters, and the only way to get them\n            // currently is to use assembly.\n            assembly {\n                r := mload(add(signature, 0x20))\n                vs := mload(add(signature, 0x40))\n            }\n            return tryRecover(hash, r, vs);\n        } else {\n            return (address(0), RecoverError.InvalidSignatureLength);\n        }\n    }\n\n    /**\n     * @dev Returns the address that signed a hashed message (`hash`) with\n     * `signature`. This address can then be used for verification purposes.\n     *\n     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:\n     * this function rejects them by requiring the `s` value to be in the lower\n     * half order, and the `v` value to be either 27 or 28.\n     *\n     * IMPORTANT: `hash` _must_ be the result of a hash operation for the\n     * verification to be secure: it is possible to craft signatures that\n     * recover to arbitrary addresses for non-hashed data. A safe way to ensure\n     * this is by receiving a hash of the original message (which may otherwise\n     * be too long), and then calling {toEthSignedMessageHash} on it.\n     */\n    function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {\n        (address recovered, RecoverError error) = tryRecover(hash, signature);\n        _throwError(error);\n        return recovered;\n    }\n\n    /**\n     * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.\n     *\n     * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]\n     *\n     * _Available since v4.3._\n     */\n    function tryRecover(\n        bytes32 hash,\n        bytes32 r,\n        bytes32 vs\n    ) internal pure returns (address, RecoverError) {\n        bytes32 s;\n        uint8 v;\n        assembly {\n            s := and(vs, 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff)\n            v := add(shr(255, vs), 27)\n        }\n        return tryRecover(hash, v, r, s);\n    }\n\n    /**\n     * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.\n     *\n     * _Available since v4.2._\n     */\n    function recover(\n        bytes32 hash,\n        bytes32 r,\n        bytes32 vs\n    ) internal pure returns (address) {\n        (address recovered, RecoverError error) = tryRecover(hash, r, vs);\n        _throwError(error);\n        return recovered;\n    }\n\n    /**\n     * @dev Overload of {ECDSA-tryRecover} that receives the `v`,\n     * `r` and `s` signature fields separately.\n     *\n     * _Available since v4.3._\n     */\n    function tryRecover(\n        bytes32 hash,\n        uint8 v,\n        bytes32 r,\n        bytes32 s\n    ) internal pure returns (address, RecoverError) {\n        // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature\n        // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines\n        // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most\n        // signatures from current libraries generate a unique signature with an s-value in the lower half order.\n        //\n        // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value\n        // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or\n        // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept\n        // these malleable signatures as well.\n        if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {\n            return (address(0), RecoverError.InvalidSignatureS);\n        }\n        if (v != 27 && v != 28) {\n            return (address(0), RecoverError.InvalidSignatureV);\n        }\n\n        // If the signature is valid (and not malleable), return the signer address\n        address signer = ecrecover(hash, v, r, s);\n        if (signer == address(0)) {\n            return (address(0), RecoverError.InvalidSignature);\n        }\n\n        return (signer, RecoverError.NoError);\n    }\n\n    /**\n     * @dev Overload of {ECDSA-recover} that receives the `v`,\n     * `r` and `s` signature fields separately.\n     */\n    function recover(\n        bytes32 hash,\n        uint8 v,\n        bytes32 r,\n        bytes32 s\n    ) internal pure returns (address) {\n        (address recovered, RecoverError error) = tryRecover(hash, v, r, s);\n        _throwError(error);\n        return recovered;\n    }\n\n    /**\n     * @dev Returns an Ethereum Signed Message, created from a `hash`. This\n     * produces hash corresponding to the one signed with the\n     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]\n     * JSON-RPC method as part of EIP-191.\n     *\n     * See {recover}.\n     */\n    function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {\n        // 32 is the length in bytes of hash,\n        // enforced by the type signature above\n        return keccak256(abi.encodePacked(\"\\x19Ethereum Signed Message:\\n32\", hash));\n    }\n\n    /**\n     * @dev Returns an Ethereum Signed Message, created from `s`. This\n     * produces hash corresponding to the one signed with the\n     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]\n     * JSON-RPC method as part of EIP-191.\n     *\n     * See {recover}.\n     */\n    function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {\n        return keccak256(abi.encodePacked(\"\\x19Ethereum Signed Message:\\n\", Strings.toString(s.length), s));\n    }\n\n    /**\n     * @dev Returns an Ethereum Signed Typed Data, created from a\n     * `domainSeparator` and a `structHash`. This produces hash corresponding\n     * to the one signed with the\n     * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]\n     * JSON-RPC method as part of EIP-712.\n     *\n     * See {recover}.\n     */\n    function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {\n        return keccak256(abi.encodePacked(\"\\x19\\x01\", domainSeparator, structHash));\n    }\n}\n"
    },
    "@openzeppelin/contracts/utils/Strings.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev String operations.\n */\nlibrary Strings {\n    bytes16 private constant _HEX_SYMBOLS = \"0123456789abcdef\";\n\n    /**\n     * @dev Converts a `uint256` to its ASCII `string` decimal representation.\n     */\n    function toString(uint256 value) internal pure returns (string memory) {\n        // Inspired by OraclizeAPI's implementation - MIT licence\n        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol\n\n        if (value == 0) {\n            return \"0\";\n        }\n        uint256 temp = value;\n        uint256 digits;\n        while (temp != 0) {\n            digits++;\n            temp /= 10;\n        }\n        bytes memory buffer = new bytes(digits);\n        while (value != 0) {\n            digits -= 1;\n            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));\n            value /= 10;\n        }\n        return string(buffer);\n    }\n\n    /**\n     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.\n     */\n    function toHexString(uint256 value) internal pure returns (string memory) {\n        if (value == 0) {\n            return \"0x00\";\n        }\n        uint256 temp = value;\n        uint256 length = 0;\n        while (temp != 0) {\n            length++;\n            temp >>= 8;\n        }\n        return toHexString(value, length);\n    }\n\n    /**\n     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.\n     */\n    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {\n        bytes memory buffer = new bytes(2 * length + 2);\n        buffer[0] = \"0\";\n        buffer[1] = \"x\";\n        for (uint256 i = 2 * length + 1; i > 1; --i) {\n            buffer[i] = _HEX_SYMBOLS[value & 0xf];\n            value >>= 4;\n        }\n        require(value == 0, \"Strings: hex length insufficient\");\n        return string(buffer);\n    }\n}\n"
    },
    "@openzeppelin/contracts/token/ERC20/IERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (token/ERC20/IERC20.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC20 standard as defined in the EIP.\n */\ninterface IERC20 {\n    /**\n     * @dev Returns the amount of tokens in existence.\n     */\n    function totalSupply() external view returns (uint256);\n\n    /**\n     * @dev Returns the amount of tokens owned by `account`.\n     */\n    function balanceOf(address account) external view returns (uint256);\n\n    /**\n     * @dev Moves `amount` tokens from the caller's account to `recipient`.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * Emits a {Transfer} event.\n     */\n    function transfer(address recipient, uint256 amount) external returns (bool);\n\n    /**\n     * @dev Returns the remaining number of tokens that `spender` will be\n     * allowed to spend on behalf of `owner` through {transferFrom}. This is\n     * zero by default.\n     *\n     * This value changes when {approve} or {transferFrom} are called.\n     */\n    function allowance(address owner, address spender) external view returns (uint256);\n\n    /**\n     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * IMPORTANT: Beware that changing an allowance with this method brings the risk\n     * that someone may use both the old and the new allowance by unfortunate\n     * transaction ordering. One possible solution to mitigate this race\n     * condition is to first reduce the spender's allowance to 0 and set the\n     * desired value afterwards:\n     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729\n     *\n     * Emits an {Approval} event.\n     */\n    function approve(address spender, uint256 amount) external returns (bool);\n\n    /**\n     * @dev Moves `amount` tokens from `sender` to `recipient` using the\n     * allowance mechanism. `amount` is then deducted from the caller's\n     * allowance.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * Emits a {Transfer} event.\n     */\n    function transferFrom(\n        address sender,\n        address recipient,\n        uint256 amount\n    ) external returns (bool);\n\n    /**\n     * @dev Emitted when `value` tokens are moved from one account (`from`) to\n     * another (`to`).\n     *\n     * Note that `value` may be zero.\n     */\n    event Transfer(address indexed from, address indexed to, uint256 value);\n\n    /**\n     * @dev Emitted when the allowance of a `spender` for an `owner` is set by\n     * a call to {approve}. `value` is the new allowance.\n     */\n    event Approval(address indexed owner, address indexed spender, uint256 value);\n}\n"
    },
    "@openzeppelin/contracts-upgradeable/utils/introspection/IERC165Upgradeable.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC165 standard, as defined in the\n * https://eips.ethereum.org/EIPS/eip-165[EIP].\n *\n * Implementers can declare support of contract interfaces, which can then be\n * queried by others ({ERC165Checker}).\n *\n * For an implementation, see {ERC165}.\n */\ninterface IERC165Upgradeable {\n    /**\n     * @dev Returns true if this contract implements the interface defined by\n     * `interfaceId`. See the corresponding\n     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]\n     * to learn more about how these ids are created.\n     *\n     * This function call must use less than 30 000 gas.\n     */\n    function supportsInterface(bytes4 interfaceId) external view returns (bool);\n}\n"
    },
    "@openzeppelin/contracts-upgradeable/utils/introspection/ERC165Upgradeable.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)\n\npragma solidity ^0.8.0;\n\nimport \"./IERC165Upgradeable.sol\";\nimport \"../../proxy/utils/Initializable.sol\";\n\n/**\n * @dev Implementation of the {IERC165} interface.\n *\n * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check\n * for the additional interface id that will be supported. For example:\n *\n * ```solidity\n * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {\n *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);\n * }\n * ```\n *\n * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.\n */\nabstract contract ERC165Upgradeable is Initializable, IERC165Upgradeable {\n    function __ERC165_init() internal onlyInitializing {\n        __ERC165_init_unchained();\n    }\n\n    function __ERC165_init_unchained() internal onlyInitializing {\n    }\n    /**\n     * @dev See {IERC165-supportsInterface}.\n     */\n    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {\n        return interfaceId == type(IERC165Upgradeable).interfaceId;\n    }\n    uint256[50] private __gap;\n}\n"
    },
    "@openzeppelin/contracts-upgradeable/utils/StringsUpgradeable.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev String operations.\n */\nlibrary StringsUpgradeable {\n    bytes16 private constant _HEX_SYMBOLS = \"0123456789abcdef\";\n\n    /**\n     * @dev Converts a `uint256` to its ASCII `string` decimal representation.\n     */\n    function toString(uint256 value) internal pure returns (string memory) {\n        // Inspired by OraclizeAPI's implementation - MIT licence\n        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol\n\n        if (value == 0) {\n            return \"0\";\n        }\n        uint256 temp = value;\n        uint256 digits;\n        while (temp != 0) {\n            digits++;\n            temp /= 10;\n        }\n        bytes memory buffer = new bytes(digits);\n        while (value != 0) {\n            digits -= 1;\n            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));\n            value /= 10;\n        }\n        return string(buffer);\n    }\n\n    /**\n     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.\n     */\n    function toHexString(uint256 value) internal pure returns (string memory) {\n        if (value == 0) {\n            return \"0x00\";\n        }\n        uint256 temp = value;\n        uint256 length = 0;\n        while (temp != 0) {\n            length++;\n            temp >>= 8;\n        }\n        return toHexString(value, length);\n    }\n\n    /**\n     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.\n     */\n    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {\n        bytes memory buffer = new bytes(2 * length + 2);\n        buffer[0] = \"0\";\n        buffer[1] = \"x\";\n        for (uint256 i = 2 * length + 1; i > 1; --i) {\n            buffer[i] = _HEX_SYMBOLS[value & 0xf];\n            value >>= 4;\n        }\n        require(value == 0, \"Strings: hex length insufficient\");\n        return string(buffer);\n    }\n}\n"
    },
    "@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\npragma solidity ^0.8.0;\nimport \"../proxy/utils/Initializable.sol\";\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract ContextUpgradeable is Initializable {\n    function __Context_init() internal onlyInitializing {\n        __Context_init_unchained();\n    }\n\n    function __Context_init_unchained() internal onlyInitializing {\n    }\n    function _msgSender() internal view virtual returns (address) {\n        return msg.sender;\n    }\n\n    function _msgData() internal view virtual returns (bytes calldata) {\n        return msg.data;\n    }\n    uint256[50] private __gap;\n}\n"
    },
    "@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/Address.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary AddressUpgradeable {\n    /**\n     * @dev Returns true if `account` is a contract.\n     *\n     * [IMPORTANT]\n     * ====\n     * It is unsafe to assume that an address for which this function returns\n     * false is an externally-owned account (EOA) and not a contract.\n     *\n     * Among others, `isContract` will return false for the following\n     * types of addresses:\n     *\n     *  - an externally-owned account\n     *  - a contract in construction\n     *  - an address where a contract will be created\n     *  - an address where a contract lived, but was destroyed\n     * ====\n     */\n    function isContract(address account) internal view returns (bool) {\n        // This method relies on extcodesize, which returns 0 for contracts in\n        // construction, since the code is only stored at the end of the\n        // constructor execution.\n\n        uint256 size;\n        assembly {\n            size := extcodesize(account)\n        }\n        return size > 0;\n    }\n\n    /**\n     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n     * `recipient`, forwarding all available gas and reverting on errors.\n     *\n     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n     * of certain opcodes, possibly making contracts go over the 2300 gas limit\n     * imposed by `transfer`, making them unable to receive funds via\n     * `transfer`. {sendValue} removes this limitation.\n     *\n     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n     *\n     * IMPORTANT: because control is transferred to `recipient`, care must be\n     * taken to not create reentrancy vulnerabilities. Consider using\n     * {ReentrancyGuard} or the\n     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n     */\n    function sendValue(address payable recipient, uint256 amount) internal {\n        require(address(this).balance >= amount, \"Address: insufficient balance\");\n\n        (bool success, ) = recipient.call{value: amount}(\"\");\n        require(success, \"Address: unable to send value, recipient may have reverted\");\n    }\n\n    /**\n     * @dev Performs a Solidity function call using a low level `call`. A\n     * plain `call` is an unsafe replacement for a function call: use this\n     * function instead.\n     *\n     * If `target` reverts with a revert reason, it is bubbled up by this\n     * function (like regular Solidity function calls).\n     *\n     * Returns the raw returned data. To convert to the expected return value,\n     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n     *\n     * Requirements:\n     *\n     * - `target` must be a contract.\n     * - calling `target` with `data` must not revert.\n     *\n     * _Available since v3.1._\n     */\n    function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n        return functionCall(target, data, \"Address: low-level call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n     * `errorMessage` as a fallback revert reason when `target` reverts.\n     *\n     * _Available since v3.1._\n     */\n    function functionCall(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) internal returns (bytes memory) {\n        return functionCallWithValue(target, data, 0, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but also transferring `value` wei to `target`.\n     *\n     * Requirements:\n     *\n     * - the calling contract must have an ETH balance of at least `value`.\n     * - the called Solidity function must be `payable`.\n     *\n     * _Available since v3.1._\n     */\n    function functionCallWithValue(\n        address target,\n        bytes memory data,\n        uint256 value\n    ) internal returns (bytes memory) {\n        return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n     * with `errorMessage` as a fallback revert reason when `target` reverts.\n     *\n     * _Available since v3.1._\n     */\n    function functionCallWithValue(\n        address target,\n        bytes memory data,\n        uint256 value,\n        string memory errorMessage\n    ) internal returns (bytes memory) {\n        require(address(this).balance >= value, \"Address: insufficient balance for call\");\n        require(isContract(target), \"Address: call to non-contract\");\n\n        (bool success, bytes memory returndata) = target.call{value: value}(data);\n        return verifyCallResult(success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but performing a static call.\n     *\n     * _Available since v3.3._\n     */\n    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n        return functionStaticCall(target, data, \"Address: low-level static call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n     * but performing a static call.\n     *\n     * _Available since v3.3._\n     */\n    function functionStaticCall(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) internal view returns (bytes memory) {\n        require(isContract(target), \"Address: static call to non-contract\");\n\n        (bool success, bytes memory returndata) = target.staticcall(data);\n        return verifyCallResult(success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the\n     * revert reason using the provided one.\n     *\n     * _Available since v4.3._\n     */\n    function verifyCallResult(\n        bool success,\n        bytes memory returndata,\n        string memory errorMessage\n    ) internal pure returns (bytes memory) {\n        if (success) {\n            return returndata;\n        } else {\n            // Look for revert reason and bubble it up if present\n            if (returndata.length > 0) {\n                // The easiest way to bubble the revert reason is using memory via assembly\n\n                assembly {\n                    let returndata_size := mload(returndata)\n                    revert(add(32, returndata), returndata_size)\n                }\n            } else {\n                revert(errorMessage);\n            }\n        }\n    }\n}\n"
    },
    "@openzeppelin/contracts-upgradeable/token/ERC721/extensions/IERC721MetadataUpgradeable.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../IERC721Upgradeable.sol\";\n\n/**\n * @title ERC-721 Non-Fungible Token Standard, optional metadata extension\n * @dev See https://eips.ethereum.org/EIPS/eip-721\n */\ninterface IERC721MetadataUpgradeable is IERC721Upgradeable {\n    /**\n     * @dev Returns the token collection name.\n     */\n    function name() external view returns (string memory);\n\n    /**\n     * @dev Returns the token collection symbol.\n     */\n    function symbol() external view returns (string memory);\n\n    /**\n     * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.\n     */\n    function tokenURI(uint256 tokenId) external view returns (string memory);\n}\n"
    },
    "@openzeppelin/contracts-upgradeable/token/ERC721/IERC721Upgradeable.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../../utils/introspection/IERC165Upgradeable.sol\";\n\n/**\n * @dev Required interface of an ERC721 compliant contract.\n */\ninterface IERC721Upgradeable is IERC165Upgradeable {\n    /**\n     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.\n     */\n    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);\n\n    /**\n     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.\n     */\n    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);\n\n    /**\n     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.\n     */\n    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);\n\n    /**\n     * @dev Returns the number of tokens in ``owner``'s account.\n     */\n    function balanceOf(address owner) external view returns (uint256 balance);\n\n    /**\n     * @dev Returns the owner of the `tokenId` token.\n     *\n     * Requirements:\n     *\n     * - `tokenId` must exist.\n     */\n    function ownerOf(uint256 tokenId) external view returns (address owner);\n\n    /**\n     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients\n     * are aware of the ERC721 protocol to prevent tokens from being forever locked.\n     *\n     * Requirements:\n     *\n     * - `from` cannot be the zero address.\n     * - `to` cannot be the zero address.\n     * - `tokenId` token must exist and be owned by `from`.\n     * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.\n     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.\n     *\n     * Emits a {Transfer} event.\n     */\n    function safeTransferFrom(\n        address from,\n        address to,\n        uint256 tokenId\n    ) external;\n\n    /**\n     * @dev Transfers `tokenId` token from `from` to `to`.\n     *\n     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.\n     *\n     * Requirements:\n     *\n     * - `from` cannot be the zero address.\n     * - `to` cannot be the zero address.\n     * - `tokenId` token must be owned by `from`.\n     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.\n     *\n     * Emits a {Transfer} event.\n     */\n    function transferFrom(\n        address from,\n        address to,\n        uint256 tokenId\n    ) external;\n\n    /**\n     * @dev Gives permission to `to` to transfer `tokenId` token to another account.\n     * The approval is cleared when the token is transferred.\n     *\n     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.\n     *\n     * Requirements:\n     *\n     * - The caller must own the token or be an approved operator.\n     * - `tokenId` must exist.\n     *\n     * Emits an {Approval} event.\n     */\n    function approve(address to, uint256 tokenId) external;\n\n    /**\n     * @dev Returns the account approved for `tokenId` token.\n     *\n     * Requirements:\n     *\n     * - `tokenId` must exist.\n     */\n    function getApproved(uint256 tokenId) external view returns (address operator);\n\n    /**\n     * @dev Approve or remove `operator` as an operator for the caller.\n     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.\n     *\n     * Requirements:\n     *\n     * - The `operator` cannot be the caller.\n     *\n     * Emits an {ApprovalForAll} event.\n     */\n    function setApprovalForAll(address operator, bool _approved) external;\n\n    /**\n     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.\n     *\n     * See {setApprovalForAll}\n     */\n    function isApprovedForAll(address owner, address operator) external view returns (bool);\n\n    /**\n     * @dev Safely transfers `tokenId` token from `from` to `to`.\n     *\n     * Requirements:\n     *\n     * - `from` cannot be the zero address.\n     * - `to` cannot be the zero address.\n     * - `tokenId` token must exist and be owned by `from`.\n     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.\n     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.\n     *\n     * Emits a {Transfer} event.\n     */\n    function safeTransferFrom(\n        address from,\n        address to,\n        uint256 tokenId,\n        bytes calldata data\n    ) external;\n}\n"
    },
    "@openzeppelin/contracts-upgradeable/token/ERC721/IERC721ReceiverUpgradeable.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @title ERC721 token receiver interface\n * @dev Interface for any contract that wants to support safeTransfers\n * from ERC721 asset contracts.\n */\ninterface IERC721ReceiverUpgradeable {\n    /**\n     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}\n     * by `operator` from `from`, this function is called.\n     *\n     * It must return its Solidity selector to confirm the token transfer.\n     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.\n     *\n     * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.\n     */\n    function onERC721Received(\n        address operator,\n        address from,\n        uint256 tokenId,\n        bytes calldata data\n    ) external returns (bytes4);\n}\n"
    },
    "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (proxy/utils/Initializable.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../../utils/AddressUpgradeable.sol\";\n\n/**\n * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed\n * behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an\n * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer\n * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.\n *\n * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as\n * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.\n *\n * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure\n * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.\n *\n * [CAUTION]\n * ====\n * Avoid leaving a contract uninitialized.\n *\n * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation\n * contract, which may impact the proxy. To initialize the implementation contract, you can either invoke the\n * initializer manually, or you can include a constructor to automatically mark it as initialized when it is deployed:\n *\n * [.hljs-theme-light.nopadding]\n * ```\n * /// @custom:oz-upgrades-unsafe-allow constructor\n * constructor() initializer {}\n * ```\n * ====\n */\nabstract contract Initializable {\n    /**\n     * @dev Indicates that the contract has been initialized.\n     */\n    bool private _initialized;\n\n    /**\n     * @dev Indicates that the contract is in the process of being initialized.\n     */\n    bool private _initializing;\n\n    /**\n     * @dev Modifier to protect an initializer function from being invoked twice.\n     */\n    modifier initializer() {\n        // If the contract is initializing we ignore whether _initialized is set in order to support multiple\n        // inheritance patterns, but we only do this in the context of a constructor, because in other contexts the\n        // contract may have been reentered.\n        require(_initializing ? _isConstructor() : !_initialized, \"Initializable: contract is already initialized\");\n\n        bool isTopLevelCall = !_initializing;\n        if (isTopLevelCall) {\n            _initializing = true;\n            _initialized = true;\n        }\n\n        _;\n\n        if (isTopLevelCall) {\n            _initializing = false;\n        }\n    }\n\n    /**\n     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the\n     * {initializer} modifier, directly or indirectly.\n     */\n    modifier onlyInitializing() {\n        require(_initializing, \"Initializable: contract is not initializing\");\n        _;\n    }\n\n    function _isConstructor() private view returns (bool) {\n        return !AddressUpgradeable.isContract(address(this));\n    }\n}\n"
    },
    "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../utils/ContextUpgradeable.sol\";\nimport \"../proxy/utils/Initializable.sol\";\n\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {\n    address private _owner;\n\n    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n    /**\n     * @dev Initializes the contract setting the deployer as the initial owner.\n     */\n    function __Ownable_init() internal onlyInitializing {\n        __Context_init_unchained();\n        __Ownable_init_unchained();\n    }\n\n    function __Ownable_init_unchained() internal onlyInitializing {\n        _transferOwnership(_msgSender());\n    }\n\n    /**\n     * @dev Returns the address of the current owner.\n     */\n    function owner() public view virtual returns (address) {\n        return _owner;\n    }\n\n    /**\n     * @dev Throws if called by any account other than the owner.\n     */\n    modifier onlyOwner() {\n        require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n        _;\n    }\n\n    /**\n     * @dev Leaves the contract without owner. It will not be possible to call\n     * `onlyOwner` functions anymore. Can only be called by the current owner.\n     *\n     * NOTE: Renouncing ownership will leave the contract without an owner,\n     * thereby removing any functionality that is only available to the owner.\n     */\n    function renounceOwnership() public virtual onlyOwner {\n        _transferOwnership(address(0));\n    }\n\n    /**\n     * @dev Transfers ownership of the contract to a new account (`newOwner`).\n     * Can only be called by the current owner.\n     */\n    function transferOwnership(address newOwner) public virtual onlyOwner {\n        require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n        _transferOwnership(newOwner);\n    }\n\n    /**\n     * @dev Transfers ownership of the contract to a new account (`newOwner`).\n     * Internal function without access restriction.\n     */\n    function _transferOwnership(address newOwner) internal virtual {\n        address oldOwner = _owner;\n        _owner = newOwner;\n        emit OwnershipTransferred(oldOwner, newOwner);\n    }\n    uint256[49] private __gap;\n}\n"
    }
  },
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    "remappings": [],
    "optimizer": {
      "enabled": true,
      "runs": 200
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    "evmVersion": "london",
    "libraries": {},
    "outputSelection": {
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}