{
  "language": "Solidity",
  "sources": {
    "contracts/Tokens/RAIR721_Contract.sol": {
      "content": "// SPDX-License-Identifier: GPL-3.0\npragma solidity 0.8.17;\n\nimport \"openzeppelin-v4.7.1/token/ERC721/ERC721.sol\";\nimport \"openzeppelin-v4.7.1/access/AccessControl.sol\";\nimport \"openzeppelin-v4.7.1/utils/introspection/ERC165.sol\";\nimport \"@openzeppelin/contracts/security/ReentrancyGuard.sol\";\nimport \"openzeppelin-v4.7.1/utils/Strings.sol\";\nimport \"./IERC2981.sol\";\nimport \"./IRAIR721_Contract.sol\";\n\n/// @title  Extended ERC721 contract for the RAIR system\n/// @notice Uses ERC2981 and ERC165 for standard royalty info\n/// @notice Uses AccessControl for the minting mechanisms\n/// @author Juan M. Sanchez M.\n/// @dev    Ideally generated by a RAIR Token Factory\ncontract RAIR721_Contract is\n    IERC2981,\n    ERC165,\n    IRAIR721_Contract,\n    ERC721,\n    AccessControl,\n    ReentrancyGuard\n{\n    // Allows the conversion of numbers to strings (used in the token URI functions)\n    using Strings for uint;\n\n    // Auxiliary struct used to avoid Stack too deep errors\n    struct rangeData {\n        uint rangeLength;\n        uint price;\n        uint tokensAllowed;\n        uint lockedTokens;\n        string name;\n    }\n\n    mapping(uint => uint) public tokenToRange;\n    mapping(uint => uint) public rangeToCollection;\n\n    //URIs\n    mapping(uint => string) internal uniqueTokenURI;\n    mapping(uint => string) internal collectionURI;\n    mapping(uint => string) internal rangeURI;\n    mapping(uint => bool) internal appendTokenIndexToCollectionURI;\n    mapping(uint => bool) internal appendTokenIndexToRangeURI;\n\n    string internal baseURI;\n    string internal contractMetadataURI;\n\n    bool appendTokenIndexToContractURI;\n    bool _requireTrader;\n\n    range[] private _ranges;\n    collection[] private _collections;\n\n    // Roles\n    bytes32 public constant MINTER = keccak256(\"MINTER\");\n    bytes32 public constant TRADER = keccak256(\"TRADER\");\n\n    address public owner;\n    address public factory;\n    string private _symbol;\n    uint16 private _royaltyFee;\n    string private _metadataExtension;\n\n    /// @notice\tMakes sure the collection exists before doing changes to it\n    /// @param\tcollectionID\tCollection to verify\n    modifier collectionExists(uint collectionID) {\n        require(\n            _collections.length > collectionID,\n            \"RAIR ERC721: Collection does not exist\"\n        );\n        _;\n    }\n\n    /// @notice\tMakes sure the range exists\n    /// @param\trangeIndex\tRange to verify\n    modifier rangeExists(uint rangeIndex) {\n        require(\n            _ranges.length > rangeIndex,\n            \"RAIR ERC721: Range does not exist\"\n        );\n        _;\n    }\n\n    /// @notice\tSets up the role system from AccessControl\n    /// @dev\tRAIR is the default symbol for the token, this can be updated with setTokenSymbol\n    /// @param\t_contractName\tName of the contract\n    /// @param\t_creatorAddress\tAddress of the creator of the contract\n    constructor(string memory _contractName, address _creatorAddress)\n        ERC721(_contractName, \"RAIR\")\n    {\n        factory = msg.sender;\n        _symbol = \"RAIR\";\n        _royaltyFee = 30000;\n        _setupRole(DEFAULT_ADMIN_ROLE, _creatorAddress);\n        _setupRole(MINTER, _creatorAddress);\n        _setupRole(TRADER, _creatorAddress);\n        _requireTrader = false;\n        owner = _creatorAddress;\n    }\n\n    /// @notice  Updates the metadata extension added at the end of all tokens\n    /// @dev     Must include the . before the extension\n    /// @param extension     Extension to be added at the end of all contract wide tokens\n    function setMetadataExtension(string calldata extension) external onlyRole(DEFAULT_ADMIN_ROLE) {\n        require(bytes(extension)[0] == '.', \"RAIR ERC721: Extension must start with a '.'\");\n        _metadataExtension = extension;\n        emit UpdatedURIExtension(_metadataExtension);\n    }\n\n    /// @notice \tTransfers the ownership of a contract to a new address\n    /// @param \tnewOwner \tAddress of the new owner of the contract\n    function transferOwnership(address newOwner)\n        public\n        onlyRole(DEFAULT_ADMIN_ROLE)\n    {\n        _grantRole(DEFAULT_ADMIN_ROLE, newOwner);\n        owner = newOwner;\n        renounceRole(DEFAULT_ADMIN_ROLE, msg.sender);\n    }\n\n    /// @notice \tUpdates the royalty fee used by the 2981 standard\n    /// @param \tnewRoyalty \tPercentage that should be sent to the owner of the contract (3 decimals, 30% = 30000)\n    function setRoyaltyFee(uint16 newRoyalty)\n        public\n        onlyRole(DEFAULT_ADMIN_ROLE)\n    {\n        _royaltyFee = newRoyalty;\n    }\n\n    /// @notice \tUpdates the token symbol\n    /// @param \tnewSymbol \tNew symbol to be returned from the symbol() function\n    function setTokenSymbol(string calldata newSymbol)\n        external\n        onlyRole(DEFAULT_ADMIN_ROLE)\n    {\n        _symbol = newSymbol;\n    }\n\n    /// @notice \tReturns the symbol for this contract\n    /// @dev \tBy default, the symbol is RAIR\n    function symbol() public view override returns (string memory) {\n        return _symbol;\n    }\n\n    /// @notice \tEnables or disables the requirement of the TRADER role to do NFT transfers\n    function requireTraderRole(bool required) public onlyRole(DEFAULT_ADMIN_ROLE) {\n        _requireTrader = required;\n    }\n\n    /// @notice \tEmits an event that OpenSea recognizes as a signal to never update the metadata for this token\n    /// @dev \tThe metadata can still be updated, but OpenSea won't update it on their platform\n    /// @param \ttokenId \tIdentifier of the token to be frozen\n    function freezeMetadataOpensea(uint tokenId) public onlyRole(DEFAULT_ADMIN_ROLE) {\n        emit PermanentURI(tokenURI(tokenId), tokenId);\n    }\n\n    /// @notice \tUpdates the URL that OpenSea uses to fetch the contract's metadata\n    /// @param \tnewURI \tURL of the metadata for the token\n    function setContractURI(string calldata newURI)\n        external\n        onlyRole(DEFAULT_ADMIN_ROLE)\n    {\n        contractMetadataURI = newURI;\n        emit UpdatedContractURI(newURI);\n    }\n\n    /// @notice \tReturns the metadata for the entire contract\n    /// @dev \tNot the NFTs, this is information about the contract itself\n    function contractURI() public view returns (string memory) {\n        return contractMetadataURI;\n    }\n\n    /// @notice\tSets the Base URI for ALL tokens\n    /// @dev\tCan be overriden by the collection-wide URI or the specific token URI\n    /// @param\tnewURI\tURI to be used\n    function setBaseURI(string calldata newURI, bool appendTokenIndex)\n        external\n        onlyRole(DEFAULT_ADMIN_ROLE)\n    {\n        baseURI = newURI;\n        appendTokenIndexToContractURI = appendTokenIndex;\n        emit UpdatedBaseURI(newURI, appendTokenIndex, _metadataExtension);\n    }\n\n    /// @notice\tOverridden function from the ERC721 contract that returns our\n    ///\t\t\tvariable base URI instead of the hardcoded URI\n    function _baseURI() internal view override(ERC721) returns (string memory) {\n        return baseURI;\n    }\n\n    /// @notice\tUpdates the unique URI of a token, but in a single transaction\n    /// @dev\tUses the single function so it also emits an event\n    /// @param\ttokenIds\tToken Indexes that will be given an URI\n    /// @param\tnewURIs\t\tNew URIs to be set\n    function setUniqueURIBatch(\n        uint[] calldata tokenIds,\n        string[] calldata newURIs\n    ) external onlyRole(DEFAULT_ADMIN_ROLE) {\n        require(\n            tokenIds.length == newURIs.length,\n            \"RAIR ERC721: Token IDs and URIs should have the same length\"\n        );\n        for (uint i = 0; i < tokenIds.length; i++) {\n            setUniqueURI(tokenIds[i], newURIs[i]);\n        }\n    }\n\n    /// @notice\tGives an individual token an unique URI\n    /// @dev\tEmits an event so there's provenance\n    /// @param\ttokenId\tToken Index that will be given an URI\n    /// @param\tnewURI\tNew URI to be given\n    function setUniqueURI(uint tokenId, string calldata newURI)\n        public\n        onlyRole(DEFAULT_ADMIN_ROLE)\n    {\n        uniqueTokenURI[tokenId] = newURI;\n        emit UpdatedTokenURI(tokenId, newURI);\n    }\n\n    /// @notice\tGives all tokens within a range a specific URI\n    /// @dev\tEmits an event so there's provenance\n    /// @param\trangeId\tToken Index that will be given an URI\n    /// @param\tnewURI\t\t    New URI to be given\n    function setRangeURI(\n        uint rangeId,\n        string calldata newURI,\n        bool appendTokenIndex\n    ) public onlyRole(DEFAULT_ADMIN_ROLE) {\n        rangeURI[rangeId] = newURI;\n        appendTokenIndexToRangeURI[rangeId] = appendTokenIndex;\n        emit UpdatedRangeURI(rangeId, newURI, appendTokenIndex, _metadataExtension);\n    }\n\n    /// @notice\tGives all tokens within a collection a specific URI\n    /// @dev\tEmits an event so there's provenance\n    /// @param\tcollectionId\tToken Index that will be given an URI\n    /// @param\tnewURI\t\tNew URI to be given\n    function setCollectionURI(\n        uint collectionId,\n        string calldata newURI,\n        bool appendTokenIndex\n    ) public onlyRole(DEFAULT_ADMIN_ROLE) {\n        collectionURI[collectionId] = newURI;\n        appendTokenIndexToCollectionURI[collectionId] = appendTokenIndex;\n        emit UpdatedProductURI(collectionId, newURI, appendTokenIndex, _metadataExtension);\n    }\n\n\tfunction tokenToCollection(uint tokenId) internal view returns (uint) {\n\t\treturn rangeToCollection[tokenToRange[tokenId]];\n\t}\n\n    /// @notice\tReturns a token's URI\n    /// @dev\tWill return unique token URI or product URI or contract URI\n    /// @param\ttokenId\t\tToken Index to look for\n    function tokenURI(uint tokenId)\n        public\n        view\n        override(ERC721)\n        returns (string memory)\n    {\n        // Unique token URI\n        string memory URI = uniqueTokenURI[tokenId];\n        if (bytes(URI).length > 0) {\n            return URI;\n        }\n\n        // Range wide URI\n        URI = rangeURI[tokenToRange[tokenId]];\n        if (bytes(URI).length > 0) {\n            if (appendTokenIndexToRangeURI[tokenToRange[tokenId]]) {\n                return\n                    string(\n                        abi.encodePacked(\n                            URI,\n                            tokenToCollectionIndex(tokenId).toString(),\n                            _metadataExtension\n                        )\n                    );\n            }\n            return URI;\n        }\n\n        // Collection wide URI\n        URI = collectionURI[tokenToCollection(tokenId)];\n        if (bytes(URI).length > 0) {\n            if (appendTokenIndexToCollectionURI[tokenToCollection(tokenId)]) {\n                return\n                    string(\n                        abi.encodePacked(\n                            URI,\n                            tokenToCollectionIndex(tokenId).toString(),\n                            _metadataExtension\n                        )\n                    );\n            }\n            return URI;\n        }\n\n        URI = baseURI;\n        if (appendTokenIndexToContractURI) {\n            return\n                string(\n                    abi.encodePacked(\n                        URI,\n                        tokenId.toString(),\n                        _metadataExtension\n                    )\n                );\n        }\n        return URI;\n    }\n\n    /// @notice\tCreates a subdivision of tokens inside the contract (collection is the same as product)\n    /// @dev\tThe collections are generated sequentially, there can be no gaps between collections\n    /// @param\t_collectionName \tName of the collection\n    /// @param\t_copies\t\t\t\tAmount of tokens inside the collection\n    function createProduct(string memory _collectionName, uint _copies)\n        public\n        onlyRole(DEFAULT_ADMIN_ROLE)\n    {\n        uint lastTokenFromPreviousCollection;\n        if (_collections.length != 0) {\n            lastTokenFromPreviousCollection =\n                _collections[_collections.length - 1].endingToken +\n                1;\n        }\n\n        collection storage newCollection = _collections.push();\n\n        newCollection.startingToken = lastTokenFromPreviousCollection;\n        // -1 because we include the initial token\n        newCollection.endingToken = newCollection.startingToken + _copies - 1;\n        newCollection.name = string(_collectionName);\n\n        emit CreatedCollection(\n            _collections.length - 1,\n            _collectionName,\n            lastTokenFromPreviousCollection,\n            _copies\n        );\n    }\n\n    /// @notice This function will create ranges in batches\n    /// @dev \tThere isn't any gas savings here\n    /// @param\tcollectionId\tContains the identification for the product\n    /// @param\tdata \t\t\tAn array with the data for all the ranges that we want to implement\n    function createRangeBatch(uint collectionId, rangeData[] calldata data)\n        external\n        onlyRole(DEFAULT_ADMIN_ROLE)\n        collectionExists(collectionId)\n    {\n        require(data.length > 0, \"RAIR ERC721: Empty array\");\n        collection storage selectedCollection = _collections[collectionId];\n        for (uint i = 0; i < data.length; i++) {\n            _createRange(\n                collectionId,\n                data[i].rangeLength,\n                data[i].tokensAllowed,\n                data[i].lockedTokens,\n                data[i].price,\n                data[i].name,\n                selectedCollection\n            );\n        }\n    }\n\n    /// @notice Creates a range inside a collection\n    /// @dev \tThis function is only available to an account with the `DEFAULT_ADMIN_ROLE` role\n    /// @dev \tThis function require thar the collection ID match a valid collection\n    /// @param\tcollectionId\tContains the identification for the product\n    /// @param\trangeLength\t\tNumber of tokens to be contained in this new range\n    /// @param \tprice \t\t\tContains the selling price for the range of NFT\n    /// @param \ttokensAllowed \tContains all the allowed NFT tokens in the range that are available for sell\n    /// @param \tlockedTokens \tContains all the NFT tokens in the range that are unavailable for sell\n    /// @param \tname \t\t\tContains the name for the created NFT collection range\n    function createRange(\n        uint collectionId,\n        uint rangeLength,\n        uint price,\n        uint tokensAllowed,\n        uint lockedTokens,\n        string calldata name\n    ) external onlyRole(DEFAULT_ADMIN_ROLE) collectionExists(collectionId) {\n        collection storage selectedCollection = _collections[collectionId];\n        _createRange(\n            collectionId,\n            rangeLength,\n            price,\n            tokensAllowed,\n            lockedTokens,\n            name,\n            selectedCollection\n        );\n    }\n\n    /// @notice This is a internal function that will create the NFT range if the requirements are met\n    /// @param\tcollectionIndex\t\tCollection identifier\n    /// @param\t_rangeLength\t\tNumber of NFTs in the range\n    /// @param \t_allowedTokens \t\tContains all the allowed NFT tokens in the range that are available for sell\n    /// @param \t_lockedTokens \t\tContains all the NFT tokens in the range that are unavailable for sell\n    /// @param \t_price \t\t\t\tContains the selling price for the range of NFT\n    /// @param \t_name \t\t\t\tContains the name for the created NFT collection range\n    function _createRange(\n        uint collectionIndex,\n        uint _rangeLength,\n        uint _allowedTokens,\n        uint _lockedTokens,\n        uint _price,\n        string calldata _name,\n        collection storage selectedCollection\n    ) internal {\n        uint nextSequentialToken = selectedCollection.startingToken;\n        if (selectedCollection.rangeList.length > 0) {\n            nextSequentialToken = (\n                _ranges[\n                    selectedCollection.rangeList[\n                        selectedCollection.rangeList.length - 1\n                    ]\n                ]\n            ).rangeEnd;\n            nextSequentialToken++;\n        }\n\n        // -1 because it includes the first token inside the range\n        require(\n            nextSequentialToken + _rangeLength - 1 <=\n                selectedCollection.endingToken,\n            \"RAIR ERC721: Invalid range length\"\n        );\n        require(\n            _allowedTokens <= _rangeLength,\n            \"RAIR ERC721: Number of allowed tokens must be less or equal than the range's length\"\n        );\n        require(\n            _lockedTokens <= _rangeLength,\n            \"RAIR ERC721: Number of locked tokens must be less or equal than the range's length\"\n        );\n        require(_price == 0 || _price >= 100, \"RAIR ERC721: Minimum price for a range is 100\");\n\n        range storage newRange = _ranges.push();\n\n        newRange.rangeStart = nextSequentialToken;\n        newRange.rangeEnd = nextSequentialToken + _rangeLength - 1;\n        newRange.mintableTokens = _rangeLength;\n        newRange.tokensAllowed = _allowedTokens;\n        newRange.lockedTokens = _lockedTokens;\n        newRange.rangePrice = _price;\n        newRange.rangeName = _name;\n\n        rangeToCollection[_ranges.length - 1] = collectionIndex;\n\n        // No need to initialize minted tokens, the default value is 0\n\n        selectedCollection.rangeList.push(_ranges.length - 1);\n\n        emit CreatedRange(\n            collectionIndex,\n            newRange.rangeStart,\n            newRange.rangeEnd,\n            newRange.rangePrice,\n            newRange.tokensAllowed,\n            newRange.lockedTokens,\n            newRange.rangeName,\n            _ranges.length - 1\n        );\n    }\n\n    /// @notice\tUpdates a range\n    /// @dev \tBecause they are sequential, the length of the range can't be modified\n    /// @param\trangeId \t\t\tIndex of the collection on the contract\n    /// @param\tname \t\t\t\tName of the range\n    /// @param\tprice_ \t\t\t\tPrice for the tokens in the range\n    /// @param\ttokensAllowed_ \t\tNumber of tokens allowed to be sold\n    /// @param\tlockedTokens_ \t\tNumber of tokens that have to be minted in order to unlock transfers\n    function updateRange(\n        uint rangeId,\n        string memory name,\n        uint price_,\n        uint tokensAllowed_,\n        uint lockedTokens_\n    ) external onlyRole(DEFAULT_ADMIN_ROLE) rangeExists(rangeId) nonReentrant {\n        range storage selectedRange = _ranges[rangeId];\n        require(price_ == 0 || price_ >= 100, \"RAIR ERC721: Range price must be greater or equal than 100\");\n        require(\n            tokensAllowed_ <= selectedRange.mintableTokens,\n            \"RAIR ERC721: Tokens allowed should be less than the number of mintable tokens\"\n        );\n        require(\n            lockedTokens_ <= selectedRange.mintableTokens,\n            \"RAIR ERC721: Locked tokens should be less than the number of mintable tokens\"\n        );\n\n        selectedRange.tokensAllowed = tokensAllowed_;\n        if (lockedTokens_ > 0 && selectedRange.lockedTokens == 0) {\n            emit TradingLocked(\n                rangeId,\n                selectedRange.rangeStart,\n                selectedRange.rangeEnd,\n                lockedTokens_\n            );\n        } else if (lockedTokens_ == 0 && selectedRange.lockedTokens > 0) {\n            emit TradingUnlocked(\n                rangeId,\n                selectedRange.rangeStart,\n                selectedRange.rangeEnd\n            );\n        }\n        selectedRange.lockedTokens = lockedTokens_;\n        selectedRange.rangePrice = price_;\n        selectedRange.rangeName = name;\n\n        emit UpdatedRange(rangeId, name, price_, tokensAllowed_, lockedTokens_);\n    }\n\n    /// @notice\tReturns the number of collections on the contract\n    /// @dev\tUse with get collection to list all of the collections\n    function getCollectionCount()\n        external\n        view\n        override(IRAIR721_Contract)\n        returns (uint)\n    {\n        return _collections.length;\n    }\n\n    /// @notice\tReturns information about a collection\n    /// @param\tcollectionIndex\tIndex of the collection\n    function getCollection(uint collectionIndex)\n        external\n        view\n        override(IRAIR721_Contract)\n        returns (collection memory)\n    {\n        return _collections[collectionIndex];\n    }\n\n    /// @notice\tTranslates the unique index of an NFT to it's collection index\n    /// @param\ttoken\tToken ID to find\n    function tokenToCollectionIndex(uint token)\n        public\n        view\n        returns (uint tokenIndex)\n    {\n        return token - _collections[tokenToCollection(token)].startingToken;\n    }\n\n    /// @notice\tFinds the first token inside a collection that doesn't have an owner\n    /// @param\tcollectionID\tIndex of the collection to search\n    /// @param\tstartingIndex\tStarting token for the search\n    /// @param\tendingIndex\t\tEnding token for the search\n    function getNextSequentialIndex(\n        uint collectionID,\n        uint startingIndex,\n        uint endingIndex\n    ) public view collectionExists(collectionID) returns (uint nextIndex) {\n        collection memory currentCollection = _collections[collectionID];\n        return\n            _getNextSequentialIndexInRange(\n                currentCollection.startingToken + startingIndex,\n                currentCollection.startingToken + endingIndex\n            );\n    }\n\n    /// @notice\t\tLoops through a range of tokens and returns the first token without an owner\n    /// @dev \t\tLoops are expensive in solidity, do not use this in a gas-consuming function\n    /// @param \t\tstartingToken \tStarting token for the search\n    /// @param \t\tendingToken \tEnding token for the search\n    function _getNextSequentialIndexInRange(\n        uint startingToken,\n        uint endingToken\n    ) internal view returns (uint nextIndex) {\n        for (nextIndex = startingToken; nextIndex <= endingToken; nextIndex++) {\n            if (!_exists(nextIndex)) {\n                break;\n            }\n        }\n        require(\n            startingToken <= nextIndex && nextIndex <= endingToken,\n            \"RAIR ERC721: There are no available tokens in this range.\"\n        );\n    }\n\n    /// @notice This functions allow us to check the information of the range\n    /// @dev \tThis function requires that the rangeIndex_ points to an existing range\n    /// @param\trangeIndex\t\tIdentification of the range to verify\n    /// @return data \t\t\tInformation about the range\n    /// @return productIndex \tContains the index of the product in the range\n    function rangeInfo(uint rangeIndex)\n        external\n        view\n        override(IRAIR721_Contract)\n        rangeExists(rangeIndex)\n        returns (range memory data, uint productIndex)\n    {\n        data = _ranges[rangeIndex];\n        productIndex = rangeToCollection[rangeIndex];\n    }\n\n    /// @notice\tVerifies if the range where a token is located is locked or not\n    /// @param\t_tokenId\tIndex of the token to search\n    function isTokenLocked(uint256 _tokenId) public view returns (bool) {\n        return _ranges[tokenToRange[_tokenId]].lockedTokens > 0;\n    }\n\n\tfunction mintFromRange(\n\t\taddress buyerAddress,\n        uint rangeIndex,\n        uint indexInCollection\n\t) \n        external\n\t\toverride(IRAIR721_Contract)\n        onlyRole(MINTER)\n        rangeExists(rangeIndex)\n\t{\n\t\t_mintFromRange(\n\t\t\tbuyerAddress,\n\t\t\trangeIndex,\n\t\t\tindexInCollection,\n\t\t\t1\n\t\t);\n\t}\n\n    /// @notice\tLoops over the user's tokens looking for one that belongs to a product and a specific range\n\t/// @dev\tLoops are expensive in solidity, so don't use this in a function that requires gas\n\t/// @param\tuserAddress\t\t\tUser to search\n\t/// @param\tcollectionIndex\t\tProduct to search\n\t/// @param\tstartingToken\t\tProduct to search\n\t/// @param\tendingToken\t\t\tProduct to search\n\tfunction hasTokenInProduct(\n        address userAddress,\n        uint collectionIndex,\n        uint startingToken,\n        uint endingToken\n    )\n        collectionExists(collectionIndex)\n        public\n        view\n        returns (bool)\n    {\n\t\tcollection memory aux = _collections[collectionIndex];\n        require(\n            aux.endingToken - aux.startingToken + 1 > startingToken &&\n            aux.endingToken - aux.startingToken + 1 > endingToken, \n            \"RAIR ERC721: Invalid parameters\"\n        );\n\t\tif (aux.endingToken != 0) {\n            uint end = aux.startingToken + endingToken;\n\t\t\tfor (uint i = aux.startingToken + startingToken; i < end; i++) {\n\t\t\t\tif (_exists(i) && ownerOf(i) == userAddress) {\n                    return true;\n                }\n\t\t\t}\n\t\t}\n\t\treturn false;\n\t}\n\n    /// @notice\tMints a specific token within a range\n    /// @dev\tHas to be used alongside getNextSequentialIndex to simulate a sequential minting\n    /// @dev\tAnyone that wants a specific token just has to call this function with the index they want\n    /// @param\tbuyerAddress\t\tAddress of the new token's owner\n    /// @param\trangeIndex\t\t\tIndex of the range\n    /// @param\tindexInCollection\tIndex of the token inside the collection\n    function _mintFromRange(\n        address buyerAddress,\n        uint rangeIndex,\n        uint indexInCollection,\n\t\tuint tokenQuantity\n    )\n        internal\n    {\n        range storage selectedRange = _ranges[rangeIndex];\n        collection storage selectedCollection = _collections[\n            rangeToCollection[rangeIndex]\n        ];\n\n        require(\n            selectedRange.tokensAllowed >= tokenQuantity,\n            \"RAIR ERC721: Not allowed to mint that many tokens\"\n        );\n        require(\n            selectedRange.rangeStart <=\n                selectedCollection.startingToken + indexInCollection &&\n                selectedCollection.startingToken + indexInCollection + tokenQuantity - 1 <=\n                selectedRange.rangeEnd,\n            \"RAIR ERC721: Tried to mint token outside of range\"\n        );\n\n        selectedRange.tokensAllowed -= tokenQuantity;\n\n        if (selectedRange.lockedTokens > 0) {\n\t\t\tif (selectedRange.lockedTokens <= tokenQuantity) {\n\t            selectedRange.lockedTokens = 0;\n\t\t\t} else {\n\t            selectedRange.lockedTokens -= tokenQuantity;\n\t\t\t}\n            if (selectedRange.lockedTokens == 0) {\n                emit TradingUnlocked(\n                    rangeIndex,\n                    selectedRange.rangeStart,\n                    selectedRange.rangeEnd\n                );\n            }\n        }\n\n\t\tfor (; tokenQuantity > 0; tokenQuantity--) {\n\t\t\t_safeMint(\n\t\t\t\tbuyerAddress,\n\t\t\t\tselectedCollection.startingToken + indexInCollection + tokenQuantity - 1\n\t\t\t);\n\t\t\ttokenToRange[\n\t\t\t\tselectedCollection.startingToken + indexInCollection + tokenQuantity - 1\n\t\t\t] = rangeIndex;\n\t\t}\n    }\n\n    /// @notice Returns the fee for the NFT sale\n    /// @param _tokenId - the NFT asset queried for royalty information\n    /// @param _salePrice - the sale price of the NFT asset specified by _tokenId\n    /// @return receiver - address of who should be sent the royalty payment\n    /// @return royaltyAmount - the royalty payment amount for _salePrice sale price\n    function royaltyInfo(uint256 _tokenId, uint256 _salePrice)\n        external\n        view\n        override(IRAIR721_Contract, IERC2981)\n        returns (address receiver, uint256 royaltyAmount)\n    {\n        require(\n            _exists(_tokenId),\n            \"RAIR ERC721: Royalty query for a non-existing token\"\n        );\n        return (owner, (_salePrice * _royaltyFee) / 100000);\n    }\n\n    function supportsInterface(bytes4 interfaceId)\n        public\n        view\n        virtual\n        override(IERC165, ERC165, AccessControl, ERC721, IERC2981)\n        returns (bool)\n    {\n        return\n            interfaceId == type(IERC2981).interfaceId ||\n            super.supportsInterface(interfaceId);\n    }\n\n    /// @notice Hook being called before every transfer\n    /// @dev\tLocks and the requirement of the TRADER role happe here\n    /// @param\t_from\t\tToken's original owner\n    /// @param\t_to\t\t\tToken's new owner\n    /// @param\t_tokenId\tToken's ID\n    function _beforeTokenTransfer(\n        address _from,\n        address _to,\n        uint256 _tokenId\n    ) internal virtual override(ERC721) nonReentrant{\n        // If the transfer isn't to mint (from = address(0)) and it's not a burn (to = address(0))\n        if (_from != address(0) && _to != address(0)) {\n            //\n            if (\n                _ranges.length > 0 &&\n                rangeToCollection[tokenToRange[_tokenId]] ==\n                tokenToCollection(_tokenId)\n            ) {\n                require(\n                    _ranges[tokenToRange[_tokenId]].lockedTokens == 0,\n                    \"RAIR ERC721: Transfers for this range are currently locked\"\n                );\n            }\n            if (_requireTrader) {\n                _checkRole(TRADER, msg.sender);\n            }\n        }\n        super._beforeTokenTransfer(_from, _to, _tokenId);\n    }\n}\n"
    },
    "contracts/Tokens/IERC2981.sol": {
      "content": "// SPDX-License-Identifier: GPL-3.0\npragma solidity ^0.8.10; \n\ninterface IERC2981 {\n    /// ERC165 bytes to add to interface array - set in parent contract\n    /// implementing this standard\n    ///\n    /// bytes4(keccak256(\"royaltyInfo(uint256,uint256,bytes)\")) == 0xc155531d\n    /// bytes4 private constant _INTERFACE_ID_ERC2981 = 0xc155531d;\n    /// _registerInterface(_INTERFACE_ID_ERC2981);\n\n    /// @notice Called with the sale price to determine how much royalty\n    //          is owed and to whom.\n    /// @param _tokenId - the NFT asset queried for royalty information\n    /// @param _salePrice - the sale price of the NFT asset specified by _tokenId\n    /// @return receiver - address of who should be sent the royalty payment\n    /// @return royaltyAmount - the royalty payment amount for _value sale price\n    function royaltyInfo(\n    \tuint256 _tokenId,\n    \tuint256 _salePrice)\n    external returns (\n    \taddress receiver,\n    \tuint256 royaltyAmount);\n\n    /// @notice Informs callers that this contract supports ERC2981\n    /// @dev If `_registerInterface(_INTERFACE_ID_ERC2981)` is called\n    ///      in the initializer, this should be automatic\n    /// @param interfaceID The interface identifier, as specified in ERC-165\n    /// @return `true` if the contract implements\n    ///         `_INTERFACE_ID_ERC2981` and `false` otherwise\n    function supportsInterface(bytes4 interfaceID) external view returns (bool);\n}"
    },
    "contracts/Tokens/IRAIR721_Contract.sol": {
      "content": "// SPDX-License-Identifier: GPL-3.0\npragma solidity ^0.8.17;\n\nimport \"openzeppelin-v4.7.1/token/ERC721/IERC721.sol\";\n\ninterface IRAIR721_Contract is IERC721 {\n    struct range {\n        uint rangeStart;\n        uint rangeEnd;\n        uint tokensAllowed;\n        uint mintableTokens;\n        uint lockedTokens;\n        uint rangePrice;\n        string rangeName;\n    }\n\n    struct collection {\n        uint startingToken;\n        uint endingToken;\n        string name;\n        uint[] rangeList;\n    }\n\n    event CreatedCollection(\n        uint indexed collectionIndex,\n        string collectionName,\n        uint startingToken,\n        uint collectionLength\n    );\n\n    event CreatedRange(\n        uint collectionIndex,\n        uint start,\n        uint end,\n        uint price,\n        uint tokensAllowed,\n        uint lockedTokens,\n        string name,\n        uint rangeIndex\n    );\n    event UpdatedRange(\n        uint rangeIndex,\n        string name,\n        uint price,\n        uint tokensAllowed,\n        uint lockedTokens\n    );\n    event TradingLocked(\n        uint indexed rangeIndex,\n        uint from,\n        uint to,\n        uint lockedTokens\n    );\n    event TradingUnlocked(uint indexed rangeIndex, uint from, uint to);\n\n    event UpdatedBaseURI(string newURI, bool appendTokenIndex, string _metadataExtension);\n    event UpdatedTokenURI(uint tokenId, string newURI);\n    event UpdatedProductURI(\n        uint productId,\n        string newURI,\n        bool appendTokenIndex,\n        string _metadataExtension\n    );\n    event UpdatedRangeURI(\n        uint rangeId,\n        string newURI,\n        bool appendTokenIndex,\n        string _metadataExtension\n    );\n    event UpdatedURIExtension(string newExtension);\n    event UpdatedContractURI(string newURI);\n\n    // For OpenSea's Freezing\n    event PermanentURI(string _value, uint256 indexed _id);\n\n    // Get the total number of collections in the contract\n    function getCollectionCount() external view returns (uint);\n\n    // Get a specific collection in the contract\n    function getCollection(uint collectionIndex)\n        external\n        view\n        returns (collection memory);\n\n    function rangeInfo(uint rangeIndex)\n        external\n        view\n        returns (range memory data, uint collectionIndex);\n\n    // Mint a token inside a collection\n    function mintFromRange(\n        address to,\n        uint collectionID,\n        uint index\n    ) external;\n\n    // Ask for the royalty info of the creator\n    function royaltyInfo(uint256 _tokenId, uint256 _salePrice)\n        external\n        view\n        returns (address receiver, uint256 royaltyAmount);\n}\n"
    },
    "openzeppelin-v4.7.1/access/AccessControl.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (access/AccessControl.sol)\n\npragma solidity ^0.8.0;\n\nimport \"./IAccessControl.sol\";\nimport \"../utils/Context.sol\";\nimport \"../utils/Strings.sol\";\nimport \"../utils/introspection/ERC165.sol\";\n\n/**\n * @dev Contract module that allows children to implement role-based access\n * control mechanisms. This is a lightweight version that doesn't allow enumerating role\n * members except through off-chain means by accessing the contract event logs. Some\n * applications may benefit from on-chain enumerability, for those cases see\n * {AccessControlEnumerable}.\n *\n * Roles are referred to by their `bytes32` identifier. These should be exposed\n * in the external API and be unique. The best way to achieve this is by\n * using `public constant` hash digests:\n *\n * ```\n * bytes32 public constant MY_ROLE = keccak256(\"MY_ROLE\");\n * ```\n *\n * Roles can be used to represent a set of permissions. To restrict access to a\n * function call, use {hasRole}:\n *\n * ```\n * function foo() public {\n *     require(hasRole(MY_ROLE, msg.sender));\n *     ...\n * }\n * ```\n *\n * Roles can be granted and revoked dynamically via the {grantRole} and\n * {revokeRole} functions. Each role has an associated admin role, and only\n * accounts that have a role's admin role can call {grantRole} and {revokeRole}.\n *\n * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means\n * that only accounts with this role will be able to grant or revoke other\n * roles. More complex role relationships can be created by using\n * {_setRoleAdmin}.\n *\n * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to\n * grant and revoke this role. Extra precautions should be taken to secure\n * accounts that have been granted it.\n */\nabstract contract AccessControl is Context, IAccessControl, ERC165 {\n    struct RoleData {\n        mapping(address => bool) members;\n        bytes32 adminRole;\n    }\n\n    mapping(bytes32 => RoleData) private _roles;\n\n    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;\n\n    /**\n     * @dev Modifier that checks that an account has a specific role. Reverts\n     * with a standardized message including the required role.\n     *\n     * The format of the revert reason is given by the following regular expression:\n     *\n     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/\n     *\n     * _Available since v4.1._\n     */\n    modifier onlyRole(bytes32 role) {\n        _checkRole(role);\n        _;\n    }\n\n    /**\n     * @dev See {IERC165-supportsInterface}.\n     */\n    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {\n        return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId);\n    }\n\n    /**\n     * @dev Returns `true` if `account` has been granted `role`.\n     */\n    function hasRole(bytes32 role, address account) public view virtual override returns (bool) {\n        return _roles[role].members[account];\n    }\n\n    /**\n     * @dev Revert with a standard message if `_msgSender()` is missing `role`.\n     * Overriding this function changes the behavior of the {onlyRole} modifier.\n     *\n     * Format of the revert message is described in {_checkRole}.\n     *\n     * _Available since v4.6._\n     */\n    function _checkRole(bytes32 role) internal view virtual {\n        _checkRole(role, _msgSender());\n    }\n\n    /**\n     * @dev Revert with a standard message if `account` is missing `role`.\n     *\n     * The format of the revert reason is given by the following regular expression:\n     *\n     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/\n     */\n    function _checkRole(bytes32 role, address account) internal view virtual {\n        if (!hasRole(role, account)) {\n            revert(\n                string(\n                    abi.encodePacked(\n                        \"AccessControl: account \",\n                        Strings.toHexString(uint160(account), 20),\n                        \" is missing role \",\n                        Strings.toHexString(uint256(role), 32)\n                    )\n                )\n            );\n        }\n    }\n\n    /**\n     * @dev Returns the admin role that controls `role`. See {grantRole} and\n     * {revokeRole}.\n     *\n     * To change a role's admin, use {_setRoleAdmin}.\n     */\n    function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) {\n        return _roles[role].adminRole;\n    }\n\n    /**\n     * @dev Grants `role` to `account`.\n     *\n     * If `account` had not been already granted `role`, emits a {RoleGranted}\n     * event.\n     *\n     * Requirements:\n     *\n     * - the caller must have ``role``'s admin role.\n     *\n     * May emit a {RoleGranted} event.\n     */\n    function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {\n        _grantRole(role, account);\n    }\n\n    /**\n     * @dev Revokes `role` from `account`.\n     *\n     * If `account` had been granted `role`, emits a {RoleRevoked} event.\n     *\n     * Requirements:\n     *\n     * - the caller must have ``role``'s admin role.\n     *\n     * May emit a {RoleRevoked} event.\n     */\n    function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {\n        _revokeRole(role, account);\n    }\n\n    /**\n     * @dev Revokes `role` from the calling account.\n     *\n     * Roles are often managed via {grantRole} and {revokeRole}: this function's\n     * purpose is to provide a mechanism for accounts to lose their privileges\n     * if they are compromised (such as when a trusted device is misplaced).\n     *\n     * If the calling account had been revoked `role`, emits a {RoleRevoked}\n     * event.\n     *\n     * Requirements:\n     *\n     * - the caller must be `account`.\n     *\n     * May emit a {RoleRevoked} event.\n     */\n    function renounceRole(bytes32 role, address account) public virtual override {\n        require(account == _msgSender(), \"AccessControl: can only renounce roles for self\");\n\n        _revokeRole(role, account);\n    }\n\n    /**\n     * @dev Grants `role` to `account`.\n     *\n     * If `account` had not been already granted `role`, emits a {RoleGranted}\n     * event. Note that unlike {grantRole}, this function doesn't perform any\n     * checks on the calling account.\n     *\n     * May emit a {RoleGranted} event.\n     *\n     * [WARNING]\n     * ====\n     * This function should only be called from the constructor when setting\n     * up the initial roles for the system.\n     *\n     * Using this function in any other way is effectively circumventing the admin\n     * system imposed by {AccessControl}.\n     * ====\n     *\n     * NOTE: This function is deprecated in favor of {_grantRole}.\n     */\n    function _setupRole(bytes32 role, address account) internal virtual {\n        _grantRole(role, account);\n    }\n\n    /**\n     * @dev Sets `adminRole` as ``role``'s admin role.\n     *\n     * Emits a {RoleAdminChanged} event.\n     */\n    function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {\n        bytes32 previousAdminRole = getRoleAdmin(role);\n        _roles[role].adminRole = adminRole;\n        emit RoleAdminChanged(role, previousAdminRole, adminRole);\n    }\n\n    /**\n     * @dev Grants `role` to `account`.\n     *\n     * Internal function without access restriction.\n     *\n     * May emit a {RoleGranted} event.\n     */\n    function _grantRole(bytes32 role, address account) internal virtual {\n        if (!hasRole(role, account)) {\n            _roles[role].members[account] = true;\n            emit RoleGranted(role, account, _msgSender());\n        }\n    }\n\n    /**\n     * @dev Revokes `role` from `account`.\n     *\n     * Internal function without access restriction.\n     *\n     * May emit a {RoleRevoked} event.\n     */\n    function _revokeRole(bytes32 role, address account) internal virtual {\n        if (hasRole(role, account)) {\n            _roles[role].members[account] = false;\n            emit RoleRevoked(role, account, _msgSender());\n        }\n    }\n}\n"
    },
    "openzeppelin-v4.7.1/token/ERC721/ERC721.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC721/ERC721.sol)\n\npragma solidity ^0.8.0;\n\nimport \"./IERC721.sol\";\nimport \"./IERC721Receiver.sol\";\nimport \"./extensions/IERC721Metadata.sol\";\nimport \"../../utils/Address.sol\";\nimport \"../../utils/Context.sol\";\nimport \"../../utils/Strings.sol\";\nimport \"../../utils/introspection/ERC165.sol\";\n\n/**\n * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including\n * the Metadata extension, but not including the Enumerable extension, which is available separately as\n * {ERC721Enumerable}.\n */\ncontract ERC721 is Context, ERC165, IERC721, IERC721Metadata {\n    using Address for address;\n    using Strings for uint256;\n\n    // Token name\n    string private _name;\n\n    // Token symbol\n    string private _symbol;\n\n    // Mapping from token ID to owner address\n    mapping(uint256 => address) private _owners;\n\n    // Mapping owner address to token count\n    mapping(address => uint256) private _balances;\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    /**\n     * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.\n     */\n    constructor(string memory name_, string memory symbol_) {\n        _name = name_;\n        _symbol = symbol_;\n    }\n\n    /**\n     * @dev See {IERC165-supportsInterface}.\n     */\n    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {\n        return\n            interfaceId == type(IERC721).interfaceId ||\n            interfaceId == type(IERC721Metadata).interfaceId ||\n            super.supportsInterface(interfaceId);\n    }\n\n    /**\n     * @dev See {IERC721-balanceOf}.\n     */\n    function balanceOf(address owner) public view virtual override returns (uint256) {\n        require(owner != address(0), \"ERC721: address zero is not a valid owner\");\n        return _balances[owner];\n    }\n\n    /**\n     * @dev See {IERC721-ownerOf}.\n     */\n    function ownerOf(uint256 tokenId) public view virtual override returns (address) {\n        address owner = _owners[tokenId];\n        require(owner != address(0), \"ERC721: invalid token ID\");\n        return owner;\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        _requireMinted(tokenId);\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 overridden 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 virtual override {\n        address owner = ERC721.ownerOf(tokenId);\n        require(to != owner, \"ERC721: approval to current owner\");\n\n        require(\n            _msgSender() == owner || isApprovedForAll(owner, _msgSender()),\n            \"ERC721: approve caller is not token owner nor approved for all\"\n        );\n\n        _approve(to, tokenId);\n    }\n\n    /**\n     * @dev See {IERC721-getApproved}.\n     */\n    function getApproved(uint256 tokenId) public view virtual override returns (address) {\n        _requireMinted(tokenId);\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        _setApprovalForAll(_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        //solhint-disable-next-line max-line-length\n        require(_isApprovedOrOwner(_msgSender(), tokenId), \"ERC721: caller is not token owner nor approved\");\n\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        require(_isApprovedOrOwner(_msgSender(), tokenId), \"ERC721: caller is not token owner nor approved\");\n        _safeTransfer(from, to, tokenId, data);\n    }\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     * `data` is additional data, it has no specified format and it is sent in call to `to`.\n     *\n     * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.\n     * implement alternative mechanisms to perform token transfer, such as signature-based.\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 `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 _safeTransfer(\n        address from,\n        address to,\n        uint256 tokenId,\n        bytes memory data\n    ) internal virtual {\n        _transfer(from, to, tokenId);\n        require(_checkOnERC721Received(from, to, tokenId, data), \"ERC721: transfer to non ERC721Receiver implementer\");\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     * and stop existing when they are burned (`_burn`).\n     */\n    function _exists(uint256 tokenId) internal view virtual returns (bool) {\n        return _owners[tokenId] != address(0);\n    }\n\n    /**\n     * @dev Returns whether `spender` is allowed to manage `tokenId`.\n     *\n     * Requirements:\n     *\n     * - `tokenId` must exist.\n     */\n    function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {\n        address owner = ERC721.ownerOf(tokenId);\n        return (spender == owner || isApprovedForAll(owner, spender) || getApproved(tokenId) == spender);\n    }\n\n    /**\n     * @dev Safely mints `tokenId` and transfers it to `to`.\n     *\n     * Requirements:\n     *\n     * - `tokenId` must not exist.\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 _safeMint(address to, uint256 tokenId) internal virtual {\n        _safeMint(to, tokenId, \"\");\n    }\n\n    /**\n     * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is\n     * forwarded in {IERC721Receiver-onERC721Received} to contract recipients.\n     */\n    function _safeMint(\n        address to,\n        uint256 tokenId,\n        bytes memory data\n    ) internal virtual {\n        _mint(to, tokenId);\n        require(\n            _checkOnERC721Received(address(0), to, tokenId, data),\n            \"ERC721: transfer to non ERC721Receiver implementer\"\n        );\n    }\n\n    /**\n     * @dev Mints `tokenId` and transfers it to `to`.\n     *\n     * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible\n     *\n     * Requirements:\n     *\n     * - `tokenId` must not exist.\n     * - `to` cannot be the zero address.\n     *\n     * Emits a {Transfer} event.\n     */\n    function _mint(address to, uint256 tokenId) internal virtual {\n        require(to != address(0), \"ERC721: mint to the zero address\");\n        require(!_exists(tokenId), \"ERC721: token already minted\");\n\n        _beforeTokenTransfer(address(0), to, tokenId);\n\n        _balances[to] += 1;\n        _owners[tokenId] = to;\n\n        emit Transfer(address(0), to, tokenId);\n\n        _afterTokenTransfer(address(0), to, tokenId);\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) internal virtual {\n        address owner = ERC721.ownerOf(tokenId);\n\n        _beforeTokenTransfer(owner, address(0), tokenId);\n\n        // Clear approvals\n        _approve(address(0), tokenId);\n\n        _balances[owner] -= 1;\n        delete _owners[tokenId];\n\n        emit Transfer(owner, address(0), tokenId);\n\n        _afterTokenTransfer(owner, address(0), tokenId);\n    }\n\n    /**\n     * @dev Transfers `tokenId` from `from` to `to`.\n     *  As opposed to {transferFrom}, this imposes no restrictions on msg.sender.\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    ) internal virtual {\n        require(ERC721.ownerOf(tokenId) == from, \"ERC721: transfer from incorrect owner\");\n        require(to != address(0), \"ERC721: transfer to the zero address\");\n\n        _beforeTokenTransfer(from, to, tokenId);\n\n        // Clear approvals from the previous owner\n        _approve(address(0), tokenId);\n\n        _balances[from] -= 1;\n        _balances[to] += 1;\n        _owners[tokenId] = to;\n\n        emit Transfer(from, to, tokenId);\n\n        _afterTokenTransfer(from, to, tokenId);\n    }\n\n    /**\n     * @dev Approve `to` to operate on `tokenId`\n     *\n     * Emits an {Approval} event.\n     */\n    function _approve(address to, uint256 tokenId) internal virtual {\n        _tokenApprovals[tokenId] = to;\n        emit Approval(ERC721.ownerOf(tokenId), to, tokenId);\n    }\n\n    /**\n     * @dev Approve `operator` to operate on all of `owner` tokens\n     *\n     * Emits an {ApprovalForAll} event.\n     */\n    function _setApprovalForAll(\n        address owner,\n        address operator,\n        bool approved\n    ) internal virtual {\n        require(owner != operator, \"ERC721: approve to caller\");\n        _operatorApprovals[owner][operator] = approved;\n        emit ApprovalForAll(owner, operator, approved);\n    }\n\n    /**\n     * @dev Reverts if the `tokenId` has not been minted yet.\n     */\n    function _requireMinted(uint256 tokenId) internal view virtual {\n        require(_exists(tokenId), \"ERC721: invalid token ID\");\n    }\n\n    /**\n     * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.\n     * The call is not executed if the target address is not a 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 _checkOnERC721Received(\n        address from,\n        address to,\n        uint256 tokenId,\n        bytes memory data\n    ) private returns (bool) {\n        if (to.isContract()) {\n            try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, data) returns (bytes4 retval) {\n                return retval == IERC721Receiver.onERC721Received.selector;\n            } catch (bytes memory reason) {\n                if (reason.length == 0) {\n                    revert(\"ERC721: transfer to non ERC721Receiver implementer\");\n                } else {\n                    /// @solidity memory-safe-assembly\n                    assembly {\n                        revert(add(32, reason), mload(reason))\n                    }\n                }\n            }\n        } else {\n            return true;\n        }\n    }\n\n    /**\n     * @dev Hook that is called before any token transfer. This includes minting\n     * and burning.\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, ``from``'s `tokenId` will be burned.\n     * - `from` and `to` are never both zero.\n     *\n     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].\n     */\n    function _beforeTokenTransfer(\n        address from,\n        address to,\n        uint256 tokenId\n    ) internal virtual {}\n\n    /**\n     * @dev Hook that is called after any transfer of tokens. This includes\n     * minting and burning.\n     *\n     * Calling conditions:\n     *\n     * - when `from` and `to` are both non-zero.\n     * - `from` and `to` are never both zero.\n     *\n     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].\n     */\n    function _afterTokenTransfer(\n        address from,\n        address to,\n        uint256 tokenId\n    ) internal virtual {}\n}\n"
    },
    "@openzeppelin/contracts/security/ReentrancyGuard.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Contract module that helps prevent reentrant calls to a function.\n *\n * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier\n * available, which can be applied to functions to make sure there are no nested\n * (reentrant) calls to them.\n *\n * Note that because there is a single `nonReentrant` guard, functions marked as\n * `nonReentrant` may not call one another. This can be worked around by making\n * those functions `private`, and then adding `external` `nonReentrant` entry\n * points to them.\n *\n * TIP: If you would like to learn more about reentrancy and alternative ways\n * to protect against it, check out our blog post\n * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].\n */\nabstract contract ReentrancyGuard {\n    // Booleans are more expensive than uint256 or any type that takes up a full\n    // word because each write operation emits an extra SLOAD to first read the\n    // slot's contents, replace the bits taken up by the boolean, and then write\n    // back. This is the compiler's defense against contract upgrades and\n    // pointer aliasing, and it cannot be disabled.\n\n    // The values being non-zero value makes deployment a bit more expensive,\n    // but in exchange the refund on every call to nonReentrant will be lower in\n    // amount. Since refunds are capped to a percentage of the total\n    // transaction's gas, it is best to keep them low in cases like this one, to\n    // increase the likelihood of the full refund coming into effect.\n    uint256 private constant _NOT_ENTERED = 1;\n    uint256 private constant _ENTERED = 2;\n\n    uint256 private _status;\n\n    constructor() {\n        _status = _NOT_ENTERED;\n    }\n\n    /**\n     * @dev Prevents a contract from calling itself, directly or indirectly.\n     * Calling a `nonReentrant` function from another `nonReentrant`\n     * function is not supported. It is possible to prevent this from happening\n     * by making the `nonReentrant` function external, and making it call a\n     * `private` function that does the actual work.\n     */\n    modifier nonReentrant() {\n        // On the first call to nonReentrant, _notEntered will be true\n        require(_status != _ENTERED, \"ReentrancyGuard: reentrant call\");\n\n        // Any calls to nonReentrant after this point will fail\n        _status = _ENTERED;\n\n        _;\n\n        // By storing the original value once again, a refund is triggered (see\n        // https://eips.ethereum.org/EIPS/eip-2200)\n        _status = _NOT_ENTERED;\n    }\n}\n"
    },
    "openzeppelin-v4.7.1/utils/introspection/ERC165.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)\n\npragma solidity ^0.8.0;\n\nimport \"./IERC165.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 ERC165 is IERC165 {\n    /**\n     * @dev See {IERC165-supportsInterface}.\n     */\n    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {\n        return interfaceId == type(IERC165).interfaceId;\n    }\n}\n"
    },
    "openzeppelin-v4.7.1/utils/Strings.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (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    uint8 private constant _ADDRESS_LENGTH = 20;\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    /**\n     * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.\n     */\n    function toHexString(address addr) internal pure returns (string memory) {\n        return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);\n    }\n}\n"
    },
    "openzeppelin-v4.7.1/token/ERC721/IERC721.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC721/IERC721.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../../utils/introspection/IERC165.sol\";\n\n/**\n * @dev Required interface of an ERC721 compliant contract.\n */\ninterface IERC721 is IERC165 {\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`.\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    /**\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 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 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 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 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"
    },
    "openzeppelin-v4.7.1/utils/introspection/IERC165.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 IERC165 {\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-v4.7.1/utils/Context.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\npragma solidity ^0.8.0;\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 Context {\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}\n"
    },
    "openzeppelin-v4.7.1/access/IAccessControl.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev External interface of AccessControl declared to support ERC165 detection.\n */\ninterface IAccessControl {\n    /**\n     * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`\n     *\n     * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite\n     * {RoleAdminChanged} not being emitted signaling this.\n     *\n     * _Available since v3.1._\n     */\n    event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);\n\n    /**\n     * @dev Emitted when `account` is granted `role`.\n     *\n     * `sender` is the account that originated the contract call, an admin role\n     * bearer except when using {AccessControl-_setupRole}.\n     */\n    event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);\n\n    /**\n     * @dev Emitted when `account` is revoked `role`.\n     *\n     * `sender` is the account that originated the contract call:\n     *   - if using `revokeRole`, it is the admin role bearer\n     *   - if using `renounceRole`, it is the role bearer (i.e. `account`)\n     */\n    event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);\n\n    /**\n     * @dev Returns `true` if `account` has been granted `role`.\n     */\n    function hasRole(bytes32 role, address account) external view returns (bool);\n\n    /**\n     * @dev Returns the admin role that controls `role`. See {grantRole} and\n     * {revokeRole}.\n     *\n     * To change a role's admin, use {AccessControl-_setRoleAdmin}.\n     */\n    function getRoleAdmin(bytes32 role) external view returns (bytes32);\n\n    /**\n     * @dev Grants `role` to `account`.\n     *\n     * If `account` had not been already granted `role`, emits a {RoleGranted}\n     * event.\n     *\n     * Requirements:\n     *\n     * - the caller must have ``role``'s admin role.\n     */\n    function grantRole(bytes32 role, address account) external;\n\n    /**\n     * @dev Revokes `role` from `account`.\n     *\n     * If `account` had been granted `role`, emits a {RoleRevoked} event.\n     *\n     * Requirements:\n     *\n     * - the caller must have ``role``'s admin role.\n     */\n    function revokeRole(bytes32 role, address account) external;\n\n    /**\n     * @dev Revokes `role` from the calling account.\n     *\n     * Roles are often managed via {grantRole} and {revokeRole}: this function's\n     * purpose is to provide a mechanism for accounts to lose their privileges\n     * if they are compromised (such as when a trusted device is misplaced).\n     *\n     * If the calling account had been granted `role`, emits a {RoleRevoked}\n     * event.\n     *\n     * Requirements:\n     *\n     * - the caller must be `account`.\n     */\n    function renounceRole(bytes32 role, address account) external;\n}\n"
    },
    "openzeppelin-v4.7.1/token/ERC721/extensions/IERC721Metadata.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 \"../IERC721.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 IERC721Metadata is IERC721 {\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-v4.7.1/token/ERC721/IERC721Receiver.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.6.0) (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 IERC721Receiver {\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 `IERC721Receiver.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-v4.7.1/utils/Address.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (utils/Address.sol)\n\npragma solidity ^0.8.1;\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary Address {\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     * [IMPORTANT]\n     * ====\n     * You shouldn't rely on `isContract` to protect against flash loan attacks!\n     *\n     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n     * constructor.\n     * ====\n     */\n    function isContract(address account) internal view returns (bool) {\n        // This method relies on extcodesize/address.code.length, which returns 0\n        // for contracts in construction, since the code is only stored at the end\n        // of the constructor execution.\n\n        return account.code.length > 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 Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but performing a delegate call.\n     *\n     * _Available since v3.4._\n     */\n    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n        return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n     * but performing a delegate call.\n     *\n     * _Available since v3.4._\n     */\n    function functionDelegateCall(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) internal returns (bytes memory) {\n        require(isContract(target), \"Address: delegate call to non-contract\");\n\n        (bool success, bytes memory returndata) = target.delegatecall(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                /// @solidity memory-safe-assembly\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"
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