creation_sourcecode: {{
    "language": "Solidity",
    "sources": {
      "contracts/ERC721CMRoyalties.sol": {
        "content": "//SPDX-License-Identifier: MIT\n\npragma solidity ^0.8.4;\n\nimport {ERC2981, UpdatableRoyalties} from \"./royalties/UpdatableRoyalties.sol\";\nimport {ERC721CM, ERC721ACQueryable, IERC721A} from \"./ERC721CM.sol\";\n\n/**\n * @title ERC721CMRoyalties\n */\ncontract ERC721CMRoyalties is ERC721CM, UpdatableRoyalties {\n    constructor(\n        string memory collectionName,\n        string memory collectionSymbol,\n        string memory tokenURISuffix,\n        uint256 maxMintableSupply,\n        uint256 globalWalletLimit,\n        address cosigner,\n        uint64 timestampExpirySeconds,\n        address mintCurrency,\n        address royaltyReceiver,\n        uint96 royaltyFeeNumerator\n    )\n        ERC721CM(\n            collectionName,\n            collectionSymbol,\n            tokenURISuffix,\n            maxMintableSupply,\n            globalWalletLimit,\n            cosigner,\n            timestampExpirySeconds,\n            mintCurrency\n        )\n        UpdatableRoyalties(royaltyReceiver, royaltyFeeNumerator)\n    {}\n\n    function supportsInterface(\n        bytes4 interfaceId\n    )\n        public\n        view\n        virtual\n        override(ERC2981, ERC721ACQueryable, IERC721A)\n        returns (bool)\n    {\n        return\n            ERC721ACQueryable.supportsInterface(interfaceId) ||\n            ERC2981.supportsInterface(interfaceId);\n    }\n}\n"
      },
      "contracts/royalties/UpdatableRoyalties.sol": {
        "content": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.4;\n\nimport {Ownable} from \"@openzeppelin/contracts/access/Ownable.sol\";\nimport {ERC2981} from \"@openzeppelin/contracts/token/common/ERC2981.sol\";\n\n/**\n * @title BasicRoyaltiesBase\n */\nabstract contract UpdatableRoyalties is ERC2981, Ownable {\n    event DefaultRoyaltySet(address indexed receiver, uint96 feeNumerator);\n    event TokenRoyaltySet(\n        uint256 indexed tokenId,\n        address indexed receiver,\n        uint96 feeNumerator\n    );\n\n    constructor(address receiver, uint96 feeNumerator) {\n        _setDefaultRoyalty(receiver, feeNumerator);\n    }\n\n    function setDefaultRoyalty(\n        address receiver,\n        uint96 feeNumerator\n    ) public onlyOwner {\n        super._setDefaultRoyalty(receiver, feeNumerator);\n        emit DefaultRoyaltySet(receiver, feeNumerator);\n    }\n\n    function setTokenRoyalty(\n        uint256 tokenId,\n        address receiver,\n        uint96 feeNumerator\n    ) public onlyOwner {\n        super._setTokenRoyalty(tokenId, receiver, feeNumerator);\n        emit TokenRoyaltySet(tokenId, receiver, feeNumerator);\n    }\n}\n"
      },
      "contracts/ERC721CM.sol": {
        "content": "//SPDX-License-Identifier: MIT\n\npragma solidity ^0.8.4;\n\nimport \"@openzeppelin/contracts/access/Ownable.sol\";\nimport \"@openzeppelin/contracts/security/ReentrancyGuard.sol\";\nimport \"@openzeppelin/contracts/token/common/ERC2981.sol\";\nimport \"@openzeppelin/contracts/utils/cryptography/ECDSA.sol\";\nimport \"@openzeppelin/contracts/utils/cryptography/MerkleProof.sol\";\nimport \"@openzeppelin/contracts/utils/cryptography/SignatureChecker.sol\";\nimport \"@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol\";\nimport \"contracts/creator-token-standards/ERC721ACQueryable.sol\";\nimport \"./IERC721M.sol\";\n\n/**\n * @title ERC721CM\n *\n * @dev ERC721ACQueryable and ERC721C subclass with MagicEden launchpad features including\n *  - multiple minting stages with time-based auto stage switch\n *  - global and stage wallet-level minting limit\n *  - whitelist using merkle tree\n *  - crossmint support\n *  - anti-botting\n */\ncontract ERC721CM is IERC721M, ERC721ACQueryable, Ownable, ReentrancyGuard {\n    using ECDSA for bytes32;\n    using SafeERC20 for IERC20;\n\n    // Whether this contract is mintable.\n    bool private _mintable;\n\n    // Whether base URI is permanent. Once set, base URI is immutable.\n    bool private _baseURIPermanent;\n\n    // Specify how long a signature from cosigner is valid for, recommend 300 seconds.\n    uint64 private _timestampExpirySeconds;\n\n    // The address of the cosigner server.\n    address private _cosigner;\n\n    // The crossmint address. Need to set if using crossmint.\n    address private _crossmintAddress;\n\n    // The total mintable supply.\n    uint256 internal _maxMintableSupply;\n\n    // Global wallet limit, across all stages.\n    uint256 private _globalWalletLimit;\n\n    // Current base URI.\n    string private _currentBaseURI;\n\n    // The suffix for the token URL, e.g. \".json\".\n    string private _tokenURISuffix;\n\n    // The uri for the storefront-level metadata for better indexing. e.g. \"ipfs://UyNGgv3jx2HHfBjQX9RnKtxj2xv2xQDtbVXoRi5rJ31234\"\n    string private _contractURI;\n\n    // Mint stage infomation. See MintStageInfo for details.\n    MintStageInfo[] private _mintStages;\n\n    // Minted count per stage per wallet.\n    mapping(uint256 => mapping(address => uint32))\n        private _stageMintedCountsPerWallet;\n\n    // Minted count per stage.\n    mapping(uint256 => uint256) private _stageMintedCounts;\n\n    // Address of ERC-20 token used to pay for minting. If 0 address, use native currency.\n    address private _mintCurrency;\n\n    constructor(\n        string memory collectionName,\n        string memory collectionSymbol,\n        string memory tokenURISuffix,\n        uint256 maxMintableSupply,\n        uint256 globalWalletLimit,\n        address cosigner,\n        uint64 timestampExpirySeconds,\n        address mintCurrency\n    ) ERC721ACQueryable(collectionName, collectionSymbol) {\n        if (globalWalletLimit > maxMintableSupply)\n            revert GlobalWalletLimitOverflow();\n        _mintable = true;\n        _maxMintableSupply = maxMintableSupply;\n        _globalWalletLimit = globalWalletLimit;\n        _tokenURISuffix = tokenURISuffix;\n        _cosigner = cosigner; // ethers.constants.AddressZero for no cosigning\n        _timestampExpirySeconds = timestampExpirySeconds;\n        _mintCurrency = mintCurrency;\n    }\n\n    /**\n     * @dev Returns whether mintable.\n     */\n    modifier canMint() {\n        if (!_mintable) revert NotMintable();\n        _;\n    }\n\n    /**\n     * @dev Returns whether it has enough supply for the given qty.\n     */\n    modifier hasSupply(uint256 qty) {\n        if (totalSupply() + qty > _maxMintableSupply) revert NoSupplyLeft();\n        _;\n    }\n\n    /**\n     * @dev Returns cosign nonce.\n     */\n    function getCosignNonce(address minter) public view returns (uint256) {\n        return _numberMinted(minter);\n    }\n\n    /**\n     * @dev Sets cosigner.\n     */\n    function setCosigner(address cosigner) external onlyOwner {\n        _cosigner = cosigner;\n        emit SetCosigner(cosigner);\n    }\n\n    /**\n     * @dev Sets expiry in seconds. This timestamp specifies how long a signature from cosigner is valid for.\n     */\n    function setTimestampExpirySeconds(uint64 expiry) external onlyOwner {\n        _timestampExpirySeconds = expiry;\n        emit SetTimestampExpirySeconds(expiry);\n    }\n\n    /**\n     * @dev Sets crossmint address if using crossmint. This allows the specified address to call `crossmint`.\n     */\n    function setCrossmintAddress(address crossmintAddress) external onlyOwner {\n        _crossmintAddress = crossmintAddress;\n        emit SetCrossmintAddress(crossmintAddress);\n    }\n\n    /**\n     * @dev Sets stages in the format of an array of `MintStageInfo`.\n     *\n     * Following is an example of launch with two stages. The first stage is exclusive for whitelisted wallets\n     * specified by merkle root.\n     *    [{\n     *      price: 10000000000000000000,\n     *      maxStageSupply: 2000,\n     *      walletLimit: 1,\n     *      merkleRoot: 0x559fadeb887449800b7b320bf1e92d309f329b9641ac238bebdb74e15c0a5218,\n     *      startTimeUnixSeconds: 1667768000,\n     *      endTimeUnixSeconds: 1667771600,\n     *     },\n     *     {\n     *      price: 20000000000000000000,\n     *      maxStageSupply: 3000,\n     *      walletLimit: 2,\n     *      merkleRoot: 0,\n     *      startTimeUnixSeconds: 1667771600,\n     *      endTimeUnixSeconds: 1667775200,\n     *     }\n     * ]\n     */\n    function setStages(MintStageInfo[] calldata newStages) external onlyOwner {\n        uint256 originalSize = _mintStages.length;\n        for (uint256 i = 0; i < originalSize; i++) {\n            _mintStages.pop();\n        }\n\n        for (uint256 i = 0; i < newStages.length; i++) {\n            if (i >= 1) {\n                if (\n                    newStages[i].startTimeUnixSeconds <\n                    newStages[i - 1].endTimeUnixSeconds +\n                        _timestampExpirySeconds\n                ) {\n                    revert InsufficientStageTimeGap();\n                }\n            }\n            _assertValidStartAndEndTimestamp(\n                newStages[i].startTimeUnixSeconds,\n                newStages[i].endTimeUnixSeconds\n            );\n            _mintStages.push(\n                MintStageInfo({\n                    price: newStages[i].price,\n                    walletLimit: newStages[i].walletLimit,\n                    merkleRoot: newStages[i].merkleRoot,\n                    maxStageSupply: newStages[i].maxStageSupply,\n                    startTimeUnixSeconds: newStages[i].startTimeUnixSeconds,\n                    endTimeUnixSeconds: newStages[i].endTimeUnixSeconds\n                })\n            );\n            emit UpdateStage(\n                i,\n                newStages[i].price,\n                newStages[i].walletLimit,\n                newStages[i].merkleRoot,\n                newStages[i].maxStageSupply,\n                newStages[i].startTimeUnixSeconds,\n                newStages[i].endTimeUnixSeconds\n            );\n        }\n    }\n\n    /**\n     * @dev Gets whether mintable.\n     */\n    function getMintable() external view returns (bool) {\n        return _mintable;\n    }\n\n    /**\n     * @dev Sets mintable.\n     */\n    function setMintable(bool mintable) external onlyOwner {\n        _mintable = mintable;\n        emit SetMintable(mintable);\n    }\n\n    /**\n     * @dev Returns number of stages.\n     */\n    function getNumberStages() external view override returns (uint256) {\n        return _mintStages.length;\n    }\n\n    /**\n     * @dev Returns maximum mintable supply.\n     */\n    function getMaxMintableSupply() external view override returns (uint256) {\n        return _maxMintableSupply;\n    }\n\n    /**\n     * @dev Sets maximum mintable supply.\n     *\n     * New supply cannot be larger than the old.\n     */\n    function setMaxMintableSupply(\n        uint256 maxMintableSupply\n    ) external virtual onlyOwner {\n        if (maxMintableSupply > _maxMintableSupply) {\n            revert CannotIncreaseMaxMintableSupply();\n        }\n        _maxMintableSupply = maxMintableSupply;\n        emit SetMaxMintableSupply(maxMintableSupply);\n    }\n\n    /**\n     * @dev Returns global wallet limit. This is the max number of tokens can be minted by one wallet.\n     */\n    function getGlobalWalletLimit() external view override returns (uint256) {\n        return _globalWalletLimit;\n    }\n\n    /**\n     * @dev Sets global wallet limit.\n     */\n    function setGlobalWalletLimit(\n        uint256 globalWalletLimit\n    ) external onlyOwner {\n        if (globalWalletLimit > _maxMintableSupply)\n            revert GlobalWalletLimitOverflow();\n        _globalWalletLimit = globalWalletLimit;\n        emit SetGlobalWalletLimit(globalWalletLimit);\n    }\n\n    /**\n     * @dev Returns number of minted token for a given address.\n     */\n    function totalMintedByAddress(\n        address a\n    ) external view virtual override returns (uint256) {\n        return _numberMinted(a);\n    }\n\n    /**\n     * @dev Returns info for one stage specified by index (starting from 0).\n     */\n    function getStageInfo(\n        uint256 index\n    ) external view override returns (MintStageInfo memory, uint32, uint256) {\n        if (index >= _mintStages.length) {\n            revert(\"InvalidStage\");\n        }\n        uint32 walletMinted = _stageMintedCountsPerWallet[index][msg.sender];\n        uint256 stageMinted = _stageMintedCounts[index];\n        return (_mintStages[index], walletMinted, stageMinted);\n    }\n\n    /**\n     * @dev Updates info for one stage specified by index (starting from 0).\n     */\n    function updateStage(\n        uint256 index,\n        uint80 price,\n        uint32 walletLimit,\n        bytes32 merkleRoot,\n        uint24 maxStageSupply,\n        uint64 startTimeUnixSeconds,\n        uint64 endTimeUnixSeconds\n    ) external onlyOwner {\n        if (index >= _mintStages.length) revert InvalidStage();\n        if (index >= 1) {\n            if (\n                startTimeUnixSeconds <\n                _mintStages[index - 1].endTimeUnixSeconds +\n                    _timestampExpirySeconds\n            ) {\n                revert InsufficientStageTimeGap();\n            }\n        }\n        _assertValidStartAndEndTimestamp(\n            startTimeUnixSeconds,\n            endTimeUnixSeconds\n        );\n        _mintStages[index].price = price;\n        _mintStages[index].walletLimit = walletLimit;\n        _mintStages[index].merkleRoot = merkleRoot;\n        _mintStages[index].maxStageSupply = maxStageSupply;\n        _mintStages[index].startTimeUnixSeconds = startTimeUnixSeconds;\n        _mintStages[index].endTimeUnixSeconds = endTimeUnixSeconds;\n\n        emit UpdateStage(\n            index,\n            price,\n            walletLimit,\n            merkleRoot,\n            maxStageSupply,\n            startTimeUnixSeconds,\n            endTimeUnixSeconds\n        );\n    }\n\n    /**\n     * @dev Returns mint currency address.\n     */\n    function getMintCurrency() external view returns (address) {\n        return _mintCurrency;\n    }\n\n    /**\n     * @dev Mints token(s).\n     *\n     * qty - number of tokens to mint\n     * proof - the merkle proof generated on client side. This applies if using whitelist.\n     * timestamp - the current timestamp\n     * signature - the signature from cosigner if using cosigner.\n     */\n    function mint(\n        uint32 qty,\n        bytes32[] calldata proof,\n        uint64 timestamp,\n        bytes calldata signature\n    ) external payable virtual nonReentrant {\n        _mintInternal(qty, msg.sender, 0, proof, timestamp, signature);\n    }\n\n    /**\n     * @dev Mints token(s) with limit.\n     *\n     * qty - number of tokens to mint\n     * limit - limit for the given minter\n     * proof - the merkle proof generated on client side. This applies if using whitelist.\n     * timestamp - the current timestamp\n     * signature - the signature from cosigner if using cosigner.\n     */\n    function mintWithLimit(\n        uint32 qty,\n        uint32 limit,\n        bytes32[] calldata proof,\n        uint64 timestamp,\n        bytes calldata signature\n    ) external payable virtual nonReentrant {\n        _mintInternal(qty, msg.sender, limit, proof, timestamp, signature);\n    }\n\n    /**\n     * @dev Mints token(s) through crossmint. This function is supposed to be called by crossmint.\n     *\n     * qty - number of tokens to mint\n     * to - the address to mint tokens to\n     * proof - the merkle proof generated on client side. This applies if using whitelist.\n     * timestamp - the current timestamp\n     * signature - the signature from cosigner if using cosigner.\n     */\n    function crossmint(\n        uint32 qty,\n        address to,\n        bytes32[] calldata proof,\n        uint64 timestamp,\n        bytes calldata signature\n    ) external payable nonReentrant {\n        if (_crossmintAddress == address(0)) revert CrossmintAddressNotSet();\n\n        // Check the caller is Crossmint\n        if (msg.sender != _crossmintAddress) revert CrossmintOnly();\n\n        _mintInternal(qty, to, 0, proof, timestamp, signature);\n    }\n\n    /**\n     * @dev Implementation of minting.\n     */\n    function _mintInternal(\n        uint32 qty,\n        address to,\n        uint32 limit,\n        bytes32[] calldata proof,\n        uint64 timestamp,\n        bytes calldata signature\n    ) internal canMint hasSupply(qty) {\n        uint64 stageTimestamp = uint64(block.timestamp);\n\n        MintStageInfo memory stage;\n        if (_cosigner != address(0)) {\n            assertValidCosign(msg.sender, qty, timestamp, signature);\n            _assertValidTimestamp(timestamp);\n            stageTimestamp = timestamp;\n        }\n\n        uint256 activeStage = getActiveStageFromTimestamp(stageTimestamp);\n\n        stage = _mintStages[activeStage];\n\n        // Check value if minting with ETH\n        if (_mintCurrency == address(0) && msg.value < stage.price * qty)\n            revert NotEnoughValue();\n\n        // Check stage supply if applicable\n        if (stage.maxStageSupply > 0) {\n            if (_stageMintedCounts[activeStage] + qty > stage.maxStageSupply)\n                revert StageSupplyExceeded();\n        }\n\n        // Check global wallet limit if applicable\n        if (_globalWalletLimit > 0) {\n            if (_numberMinted(to) + qty > _globalWalletLimit)\n                revert WalletGlobalLimitExceeded();\n        }\n\n        // Check wallet limit for stage if applicable, limit == 0 means no limit enforced\n        if (stage.walletLimit > 0) {\n            if (\n                _stageMintedCountsPerWallet[activeStage][to] + qty >\n                stage.walletLimit\n            ) revert WalletStageLimitExceeded();\n        }\n\n        // Check merkle proof if applicable, merkleRoot == 0x00...00 means no proof required\n        if (stage.merkleRoot != 0) {\n            if (\n                MerkleProof.processProof(\n                    proof,\n                    keccak256(abi.encodePacked(to, limit))\n                ) != stage.merkleRoot\n            ) revert InvalidProof();\n\n            // Verify merkle proof mint limit\n            if (limit > 0 && _stageMintedCountsPerWallet[activeStage][to] + qty > limit) {\n                revert WalletStageLimitExceeded();\n            }\n        }\n\n        if (_mintCurrency != address(0)) {\n            IERC20(_mintCurrency).safeTransferFrom(\n                msg.sender,\n                address(this),\n                stage.price * qty\n            );\n        }\n\n        _stageMintedCountsPerWallet[activeStage][to] += qty;\n        _stageMintedCounts[activeStage] += qty;\n        _safeMint(to, qty);\n    }\n\n    /**\n     * @dev Mints token(s) by owner.\n     *\n     * NOTE: This function bypasses validations thus only available for owner.\n     * This is typically used for owner to  pre-mint or mint the remaining of the supply.\n     */\n    function ownerMint(\n        uint32 qty,\n        address to\n    ) external onlyOwner hasSupply(qty) {\n        _safeMint(to, qty);\n    }\n\n    /**\n     * @dev Withdraws funds by owner.\n     */\n    function withdraw() external onlyOwner {\n        uint256 value = address(this).balance;\n        (bool success, ) = msg.sender.call{value: value}(\"\");\n        if (!success) revert WithdrawFailed();\n        emit Withdraw(value);\n    }\n\n    /**\n     * @dev Withdraws ERC-20 funds by owner.\n     */\n    function withdrawERC20() external onlyOwner {\n        if (_mintCurrency == address(0)) revert WrongMintCurrency();\n        uint256 value = IERC20(_mintCurrency).balanceOf(address(this));\n        IERC20(_mintCurrency).safeTransfer(msg.sender, value);\n        emit WithdrawERC20(_mintCurrency, value);\n    }\n\n    /**\n     * @dev Sets token base URI.\n     */\n    function setBaseURI(string calldata baseURI) external onlyOwner {\n        if (_baseURIPermanent) revert CannotUpdatePermanentBaseURI();\n        _currentBaseURI = baseURI;\n        emit SetBaseURI(baseURI);\n    }\n\n    /**\n     * @dev Sets token base URI permanent. Cannot revert.\n     */\n    function setBaseURIPermanent() external onlyOwner {\n        _baseURIPermanent = true;\n        emit PermanentBaseURI(_currentBaseURI);\n    }\n\n    /**\n     * @dev Sets token URI suffix. e.g. \".json\".\n     */\n    function setTokenURISuffix(string calldata suffix) external onlyOwner {\n        _tokenURISuffix = suffix;\n    }\n\n    /**\n     * @dev Returns token URI for a given token id.\n     */\n    function tokenURI(\n        uint256 tokenId\n    ) public view override(ERC721A, IERC721A) returns (string memory) {\n        if (!_exists(tokenId)) revert URIQueryForNonexistentToken();\n\n        string memory baseURI = _currentBaseURI;\n        return\n            bytes(baseURI).length != 0\n                ? string(\n                    abi.encodePacked(\n                        baseURI,\n                        _toString(tokenId),\n                        _tokenURISuffix\n                    )\n                )\n                : \"\";\n    }\n\n    /**\n     * @dev Returns URI for the collection-level metadata.\n     */\n    function contractURI() public view returns (string memory) {\n        return _contractURI;\n    }\n\n    /**\n     * @dev Set the URI for the collection-level metadata.\n     */\n    function setContractURI(string calldata uri) external onlyOwner {\n        _contractURI = uri;\n    }\n\n    /**\n     * @dev Returns data hash for the given minter, qty and timestamp.\n     */\n    function getCosignDigest(\n        address minter,\n        uint32 qty,\n        uint64 timestamp\n    ) public view returns (bytes32) {\n        if (_cosigner == address(0)) revert CosignerNotSet();\n        return\n            keccak256(\n                abi.encodePacked(\n                    address(this),\n                    minter,\n                    qty,\n                    _cosigner,\n                    timestamp,\n                    _chainID(),\n                    getCosignNonce(minter)\n                )\n            ).toEthSignedMessageHash();\n    }\n\n    /**\n     * @dev Validates the the given signature.\n     */\n    function assertValidCosign(\n        address minter,\n        uint32 qty,\n        uint64 timestamp,\n        bytes memory signature\n    ) public view {\n        if (\n            !SignatureChecker.isValidSignatureNow(\n                _cosigner,\n                getCosignDigest(minter, qty, timestamp),\n                signature\n            )\n        ) revert InvalidCosignSignature();\n    }\n\n    /**\n     * @dev Returns the current active stage based on timestamp.\n     */\n    function getActiveStageFromTimestamp(\n        uint64 timestamp\n    ) public view returns (uint256) {\n        for (uint256 i = 0; i < _mintStages.length; i++) {\n            if (\n                timestamp >= _mintStages[i].startTimeUnixSeconds &&\n                timestamp < _mintStages[i].endTimeUnixSeconds\n            ) {\n                return i;\n            }\n        }\n        revert InvalidStage();\n    }\n\n    /**\n     * @dev Validates the timestamp is not expired.\n     */\n    function _assertValidTimestamp(uint64 timestamp) internal view {\n        if (timestamp < block.timestamp - _timestampExpirySeconds)\n            revert TimestampExpired();\n    }\n\n    /**\n     * @dev Validates the start timestamp is before end timestamp. Used when updating stages.\n     */\n    function _assertValidStartAndEndTimestamp(\n        uint64 start,\n        uint64 end\n    ) internal pure {\n        if (start >= end) revert InvalidStartAndEndTimestamp();\n    }\n\n    /**\n     * @dev Returns chain id.\n     */\n    function _chainID() private view returns (uint256) {\n        uint256 chainID;\n        assembly {\n            chainID := chainid()\n        }\n        return chainID;\n    }\n\n    function _requireCallerIsContractOwner() internal view virtual override {\n        _checkOwner();\n    }\n}\n"
      },
      "@openzeppelin/contracts/access/Ownable.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../utils/Context.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 Ownable is Context {\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    constructor() {\n        _transferOwnership(_msgSender());\n    }\n\n    /**\n     * @dev Throws if called by any account other than the owner.\n     */\n    modifier onlyOwner() {\n        _checkOwner();\n        _;\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 the sender is not the owner.\n     */\n    function _checkOwner() internal view virtual {\n        require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n    }\n\n    /**\n     * @dev Leaves the contract without owner. It will not be possible to call\n     * `onlyOwner` functions. Can only be called by the current owner.\n     *\n     * NOTE: Renouncing ownership will leave the contract without an owner,\n     * thereby disabling 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}\n"
      },
      "@openzeppelin/contracts/token/common/ERC2981.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.0) (token/common/ERC2981.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../../interfaces/IERC2981.sol\";\nimport \"../../utils/introspection/ERC165.sol\";\n\n/**\n * @dev Implementation of the NFT Royalty Standard, a standardized way to retrieve royalty payment information.\n *\n * Royalty information can be specified globally for all token ids via {_setDefaultRoyalty}, and/or individually for\n * specific token ids via {_setTokenRoyalty}. The latter takes precedence over the first.\n *\n * Royalty is specified as a fraction of sale price. {_feeDenominator} is overridable but defaults to 10000, meaning the\n * fee is specified in basis points by default.\n *\n * IMPORTANT: ERC-2981 only specifies a way to signal royalty information and does not enforce its payment. See\n * https://eips.ethereum.org/EIPS/eip-2981#optional-royalty-payments[Rationale] in the EIP. Marketplaces are expected to\n * voluntarily pay royalties together with sales, but note that this standard is not yet widely supported.\n *\n * _Available since v4.5._\n */\nabstract contract ERC2981 is IERC2981, ERC165 {\n    struct RoyaltyInfo {\n        address receiver;\n        uint96 royaltyFraction;\n    }\n\n    RoyaltyInfo private _defaultRoyaltyInfo;\n    mapping(uint256 => RoyaltyInfo) private _tokenRoyaltyInfo;\n\n    /**\n     * @dev See {IERC165-supportsInterface}.\n     */\n    function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC165) returns (bool) {\n        return interfaceId == type(IERC2981).interfaceId || super.supportsInterface(interfaceId);\n    }\n\n    /**\n     * @inheritdoc IERC2981\n     */\n    function royaltyInfo(uint256 tokenId, uint256 salePrice) public view virtual override returns (address, uint256) {\n        RoyaltyInfo memory royalty = _tokenRoyaltyInfo[tokenId];\n\n        if (royalty.receiver == address(0)) {\n            royalty = _defaultRoyaltyInfo;\n        }\n\n        uint256 royaltyAmount = (salePrice * royalty.royaltyFraction) / _feeDenominator();\n\n        return (royalty.receiver, royaltyAmount);\n    }\n\n    /**\n     * @dev The denominator with which to interpret the fee set in {_setTokenRoyalty} and {_setDefaultRoyalty} as a\n     * fraction of the sale price. Defaults to 10000 so fees are expressed in basis points, but may be customized by an\n     * override.\n     */\n    function _feeDenominator() internal pure virtual returns (uint96) {\n        return 10000;\n    }\n\n    /**\n     * @dev Sets the royalty information that all ids in this contract will default to.\n     *\n     * Requirements:\n     *\n     * - `receiver` cannot be the zero address.\n     * - `feeNumerator` cannot be greater than the fee denominator.\n     */\n    function _setDefaultRoyalty(address receiver, uint96 feeNumerator) internal virtual {\n        require(feeNumerator <= _feeDenominator(), \"ERC2981: royalty fee will exceed salePrice\");\n        require(receiver != address(0), \"ERC2981: invalid receiver\");\n\n        _defaultRoyaltyInfo = RoyaltyInfo(receiver, feeNumerator);\n    }\n\n    /**\n     * @dev Removes default royalty information.\n     */\n    function _deleteDefaultRoyalty() internal virtual {\n        delete _defaultRoyaltyInfo;\n    }\n\n    /**\n     * @dev Sets the royalty information for a specific token id, overriding the global default.\n     *\n     * Requirements:\n     *\n     * - `receiver` cannot be the zero address.\n     * - `feeNumerator` cannot be greater than the fee denominator.\n     */\n    function _setTokenRoyalty(uint256 tokenId, address receiver, uint96 feeNumerator) internal virtual {\n        require(feeNumerator <= _feeDenominator(), \"ERC2981: royalty fee will exceed salePrice\");\n        require(receiver != address(0), \"ERC2981: Invalid parameters\");\n\n        _tokenRoyaltyInfo[tokenId] = RoyaltyInfo(receiver, feeNumerator);\n    }\n\n    /**\n     * @dev Resets royalty information for the token id back to the global default.\n     */\n    function _resetTokenRoyalty(uint256 tokenId) internal virtual {\n        delete _tokenRoyaltyInfo[tokenId];\n    }\n}\n"
      },
      "@openzeppelin/contracts/utils/Context.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.4) (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    function _contextSuffixLength() internal view virtual returns (uint256) {\n        return 0;\n    }\n}\n"
      },
      "@openzeppelin/contracts/interfaces/IERC2981.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.0) (interfaces/IERC2981.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../utils/introspection/IERC165.sol\";\n\n/**\n * @dev Interface for the NFT Royalty Standard.\n *\n * A standardized way to retrieve royalty payment information for non-fungible tokens (NFTs) to enable universal\n * support for royalty payments across all NFT marketplaces and ecosystem participants.\n *\n * _Available since v4.5._\n */\ninterface IERC2981 is IERC165 {\n    /**\n     * @dev Returns how much royalty is owed and to whom, based on a sale price that may be denominated in any unit of\n     * exchange. The royalty amount is denominated and should be paid in that same unit of exchange.\n     */\n    function royaltyInfo(\n        uint256 tokenId,\n        uint256 salePrice\n    ) external view returns (address receiver, uint256 royaltyAmount);\n}\n"
      },
      "@openzeppelin/contracts/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/contracts/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"
      },
      "contracts/IERC721M.sol": {
        "content": "//SPDX-License-Identifier: MIT\npragma solidity ^0.8.4;\n\nimport \"erc721a/contracts/extensions/IERC721AQueryable.sol\";\n\ninterface IERC721M is IERC721AQueryable {\n    error CannotIncreaseMaxMintableSupply();\n    error CannotUpdatePermanentBaseURI();\n    error CosignerNotSet();\n    error CrossmintAddressNotSet();\n    error CrossmintOnly();\n    error GlobalWalletLimitOverflow();\n    error InsufficientStageTimeGap();\n    error InvalidCosignSignature();\n    error InvalidProof();\n    error InvalidStage();\n    error InvalidStageArgsLength();\n    error InvalidStartAndEndTimestamp();\n    error NoSupplyLeft();\n    error NotEnoughValue();\n    error NotMintable();\n    error Mintable();\n    error StageSupplyExceeded();\n    error TimestampExpired();\n    error WalletGlobalLimitExceeded();\n    error WalletStageLimitExceeded();\n    error WithdrawFailed();\n    error WrongMintCurrency();\n    error NotSupported();\n\n    struct MintStageInfo {\n        uint80 price;\n        uint32 walletLimit; // 0 for unlimited\n        bytes32 merkleRoot; // 0x0 for no presale enforced\n        uint24 maxStageSupply; // 0 for unlimited\n        uint64 startTimeUnixSeconds;\n        uint64 endTimeUnixSeconds;\n    }\n\n    event UpdateStage(\n        uint256 stage,\n        uint80 price,\n        uint32 walletLimit,\n        bytes32 merkleRoot,\n        uint24 maxStageSupply,\n        uint64 startTimeUnixSeconds,\n        uint64 endTimeUnixSeconds\n    );\n\n    event SetCosigner(address cosigner);\n    event SetCrossmintAddress(address crossmintAddress);\n    event SetMintable(bool mintable);\n    event SetMaxMintableSupply(uint256 maxMintableSupply);\n    event SetGlobalWalletLimit(uint256 globalWalletLimit);\n    event SetActiveStage(uint256 activeStage);\n    event SetBaseURI(string baseURI);\n    event SetTimestampExpirySeconds(uint64 expiry);\n    event SetMintCurrency(address mintCurrency);\n    event PermanentBaseURI(string baseURI);\n    event Withdraw(uint256 value);\n    event WithdrawERC20(address mintCurrency, uint256 value);\n\n    function getNumberStages() external view returns (uint256);\n\n    function getGlobalWalletLimit() external view returns (uint256);\n\n    function getMaxMintableSupply() external view returns (uint256);\n\n    function totalMintedByAddress(address a) external view returns (uint256);\n\n    function getStageInfo(\n        uint256 index\n    ) external view returns (MintStageInfo memory, uint32, uint256);\n    \n    function mint(uint32 qty, bytes32[] calldata proof, uint64 timestamp, bytes calldata signature) external payable;\n\n    function mintWithLimit(uint32 qty, uint32 limit, bytes32[] calldata proof, uint64 timestamp, bytes calldata signature) external payable;\n\n    function crossmint(uint32 qty, address to, bytes32[] calldata proof, uint64 timestamp, bytes calldata signature) external payable;\n}\n"
      },
      "contracts/creator-token-standards/ERC721ACQueryable.sol": {
        "content": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.4;\n\nimport \"./CreatorTokenBase.sol\";\nimport \"erc721a/contracts/extensions/ERC721AQueryable.sol\";\n\n/**\n * @title ERC721ACQueryable\n */\nabstract contract ERC721ACQueryable is ERC721AQueryable, CreatorTokenBase {\n    constructor(\n        string memory name_,\n        string memory symbol_\n    ) CreatorTokenBase() ERC721A(name_, symbol_) {}\n\n    function supportsInterface(\n        bytes4 interfaceId\n    ) public view virtual override(ERC721A, IERC721A) returns (bool) {\n        return\n            interfaceId == type(ICreatorToken).interfaceId ||\n            ERC721A.supportsInterface(interfaceId);\n    }\n\n    /// @dev Ties the erc721a _beforeTokenTransfers hook to more granular transfer validation logic\n    function _beforeTokenTransfers(\n        address from,\n        address to,\n        uint256 startTokenId,\n        uint256 quantity\n    ) internal virtual override {\n        for (uint256 i = 0; i < quantity; ) {\n            _validateBeforeTransfer(from, to, startTokenId + i);\n            unchecked {\n                ++i;\n            }\n        }\n    }\n\n    /// @dev Ties the erc721a _afterTokenTransfer hook to more granular transfer validation logic\n    function _afterTokenTransfers(\n        address from,\n        address to,\n        uint256 startTokenId,\n        uint256 quantity\n    ) internal virtual override {\n        for (uint256 i = 0; i < quantity; ) {\n            _validateAfterTransfer(from, to, startTokenId + i);\n            unchecked {\n                ++i;\n            }\n        }\n    }\n\n    function _msgSenderERC721A()\n        internal\n        view\n        virtual\n        override\n        returns (address)\n    {\n        return _msgSender();\n    }\n}\n"
      },
      "@openzeppelin/contracts/security/ReentrancyGuard.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.0) (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        _nonReentrantBefore();\n        _;\n        _nonReentrantAfter();\n    }\n\n    function _nonReentrantBefore() private {\n        // On the first call to nonReentrant, _status will be _NOT_ENTERED\n        require(_status != _ENTERED, \"ReentrancyGuard: reentrant call\");\n\n        // Any calls to nonReentrant after this point will fail\n        _status = _ENTERED;\n    }\n\n    function _nonReentrantAfter() private {\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    /**\n     * @dev Returns true if the reentrancy guard is currently set to \"entered\", which indicates there is a\n     * `nonReentrant` function in the call stack.\n     */\n    function _reentrancyGuardEntered() internal view returns (bool) {\n        return _status == _ENTERED;\n    }\n}\n"
      },
      "@openzeppelin/contracts/utils/cryptography/ECDSA.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.0) (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 // Deprecated in v4.8\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        }\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        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            /// @solidity memory-safe-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 {\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(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address, RecoverError) {\n        bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);\n        uint8 v = uint8((uint256(vs) >> 255) + 27);\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(bytes32 hash, bytes32 r, bytes32 vs) 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(bytes32 hash, uint8 v, bytes32 r, bytes32 s) 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\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(bytes32 hash, uint8 v, bytes32 r, bytes32 s) 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 message) {\n        // 32 is the length in bytes of hash,\n        // enforced by the type signature above\n        /// @solidity memory-safe-assembly\n        assembly {\n            mstore(0x00, \"\\x19Ethereum Signed Message:\\n32\")\n            mstore(0x1c, hash)\n            message := keccak256(0x00, 0x3c)\n        }\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 data) {\n        /// @solidity memory-safe-assembly\n        assembly {\n            let ptr := mload(0x40)\n            mstore(ptr, \"\\x19\\x01\")\n            mstore(add(ptr, 0x02), domainSeparator)\n            mstore(add(ptr, 0x22), structHash)\n            data := keccak256(ptr, 0x42)\n        }\n    }\n\n    /**\n     * @dev Returns an Ethereum Signed Data with intended validator, created from a\n     * `validator` and `data` according to the version 0 of EIP-191.\n     *\n     * See {recover}.\n     */\n    function toDataWithIntendedValidatorHash(address validator, bytes memory data) internal pure returns (bytes32) {\n        return keccak256(abi.encodePacked(\"\\x19\\x00\", validator, data));\n    }\n}\n"
      },
      "@openzeppelin/contracts/utils/cryptography/SignatureChecker.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.0) (utils/cryptography/SignatureChecker.sol)\n\npragma solidity ^0.8.0;\n\nimport \"./ECDSA.sol\";\nimport \"../../interfaces/IERC1271.sol\";\n\n/**\n * @dev Signature verification helper that can be used instead of `ECDSA.recover` to seamlessly support both ECDSA\n * signatures from externally owned accounts (EOAs) as well as ERC1271 signatures from smart contract wallets like\n * Argent and Gnosis Safe.\n *\n * _Available since v4.1._\n */\nlibrary SignatureChecker {\n    /**\n     * @dev Checks if a signature is valid for a given signer and data hash. If the signer is a smart contract, the\n     * signature is validated against that smart contract using ERC1271, otherwise it's validated using `ECDSA.recover`.\n     *\n     * NOTE: Unlike ECDSA signatures, contract signatures are revocable, and the outcome of this function can thus\n     * change through time. It could return true at block N and false at block N+1 (or the opposite).\n     */\n    function isValidSignatureNow(address signer, bytes32 hash, bytes memory signature) internal view returns (bool) {\n        (address recovered, ECDSA.RecoverError error) = ECDSA.tryRecover(hash, signature);\n        return\n            (error == ECDSA.RecoverError.NoError && recovered == signer) ||\n            isValidERC1271SignatureNow(signer, hash, signature);\n    }\n\n    /**\n     * @dev Checks if a signature is valid for a given signer and data hash. The signature is validated\n     * against the signer smart contract using ERC1271.\n     *\n     * NOTE: Unlike ECDSA signatures, contract signatures are revocable, and the outcome of this function can thus\n     * change through time. It could return true at block N and false at block N+1 (or the opposite).\n     */\n    function isValidERC1271SignatureNow(\n        address signer,\n        bytes32 hash,\n        bytes memory signature\n    ) internal view returns (bool) {\n        (bool success, bytes memory result) = signer.staticcall(\n            abi.encodeWithSelector(IERC1271.isValidSignature.selector, hash, signature)\n        );\n        return (success &&\n            result.length >= 32 &&\n            abi.decode(result, (bytes32)) == bytes32(IERC1271.isValidSignature.selector));\n    }\n}\n"
      },
      "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.2) (utils/cryptography/MerkleProof.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev These functions deal with verification of Merkle Tree proofs.\n *\n * The tree and the proofs can be generated using our\n * https://github.com/OpenZeppelin/merkle-tree[JavaScript library].\n * You will find a quickstart guide in the readme.\n *\n * WARNING: You should avoid using leaf values that are 64 bytes long prior to\n * hashing, or use a hash function other than keccak256 for hashing leaves.\n * This is because the concatenation of a sorted pair of internal nodes in\n * the merkle tree could be reinterpreted as a leaf value.\n * OpenZeppelin's JavaScript library generates merkle trees that are safe\n * against this attack out of the box.\n */\nlibrary MerkleProof {\n    /**\n     * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree\n     * defined by `root`. For this, a `proof` must be provided, containing\n     * sibling hashes on the branch from the leaf to the root of the tree. Each\n     * pair of leaves and each pair of pre-images are assumed to be sorted.\n     */\n    function verify(bytes32[] memory proof, bytes32 root, bytes32 leaf) internal pure returns (bool) {\n        return processProof(proof, leaf) == root;\n    }\n\n    /**\n     * @dev Calldata version of {verify}\n     *\n     * _Available since v4.7._\n     */\n    function verifyCalldata(bytes32[] calldata proof, bytes32 root, bytes32 leaf) internal pure returns (bool) {\n        return processProofCalldata(proof, leaf) == root;\n    }\n\n    /**\n     * @dev Returns the rebuilt hash obtained by traversing a Merkle tree up\n     * from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt\n     * hash matches the root of the tree. When processing the proof, the pairs\n     * of leafs & pre-images are assumed to be sorted.\n     *\n     * _Available since v4.4._\n     */\n    function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) {\n        bytes32 computedHash = leaf;\n        for (uint256 i = 0; i < proof.length; i++) {\n            computedHash = _hashPair(computedHash, proof[i]);\n        }\n        return computedHash;\n    }\n\n    /**\n     * @dev Calldata version of {processProof}\n     *\n     * _Available since v4.7._\n     */\n    function processProofCalldata(bytes32[] calldata proof, bytes32 leaf) internal pure returns (bytes32) {\n        bytes32 computedHash = leaf;\n        for (uint256 i = 0; i < proof.length; i++) {\n            computedHash = _hashPair(computedHash, proof[i]);\n        }\n        return computedHash;\n    }\n\n    /**\n     * @dev Returns true if the `leaves` can be simultaneously proven to be a part of a merkle tree defined by\n     * `root`, according to `proof` and `proofFlags` as described in {processMultiProof}.\n     *\n     * CAUTION: Not all merkle trees admit multiproofs. See {processMultiProof} for details.\n     *\n     * _Available since v4.7._\n     */\n    function multiProofVerify(\n        bytes32[] memory proof,\n        bool[] memory proofFlags,\n        bytes32 root,\n        bytes32[] memory leaves\n    ) internal pure returns (bool) {\n        return processMultiProof(proof, proofFlags, leaves) == root;\n    }\n\n    /**\n     * @dev Calldata version of {multiProofVerify}\n     *\n     * CAUTION: Not all merkle trees admit multiproofs. See {processMultiProof} for details.\n     *\n     * _Available since v4.7._\n     */\n    function multiProofVerifyCalldata(\n        bytes32[] calldata proof,\n        bool[] calldata proofFlags,\n        bytes32 root,\n        bytes32[] memory leaves\n    ) internal pure returns (bool) {\n        return processMultiProofCalldata(proof, proofFlags, leaves) == root;\n    }\n\n    /**\n     * @dev Returns the root of a tree reconstructed from `leaves` and sibling nodes in `proof`. The reconstruction\n     * proceeds by incrementally reconstructing all inner nodes by combining a leaf/inner node with either another\n     * leaf/inner node or a proof sibling node, depending on whether each `proofFlags` item is true or false\n     * respectively.\n     *\n     * CAUTION: Not all merkle trees admit multiproofs. To use multiproofs, it is sufficient to ensure that: 1) the tree\n     * is complete (but not necessarily perfect), 2) the leaves to be proven are in the opposite order they are in the\n     * tree (i.e., as seen from right to left starting at the deepest layer and continuing at the next layer).\n     *\n     * _Available since v4.7._\n     */\n    function processMultiProof(\n        bytes32[] memory proof,\n        bool[] memory proofFlags,\n        bytes32[] memory leaves\n    ) internal pure returns (bytes32 merkleRoot) {\n        // This function rebuilds the root hash by traversing the tree up from the leaves. The root is rebuilt by\n        // consuming and producing values on a queue. The queue starts with the `leaves` array, then goes onto the\n        // `hashes` array. At the end of the process, the last hash in the `hashes` array should contain the root of\n        // the merkle tree.\n        uint256 leavesLen = leaves.length;\n        uint256 proofLen = proof.length;\n        uint256 totalHashes = proofFlags.length;\n\n        // Check proof validity.\n        require(leavesLen + proofLen - 1 == totalHashes, \"MerkleProof: invalid multiproof\");\n\n        // The xxxPos values are \"pointers\" to the next value to consume in each array. All accesses are done using\n        // `xxx[xxxPos++]`, which return the current value and increment the pointer, thus mimicking a queue's \"pop\".\n        bytes32[] memory hashes = new bytes32[](totalHashes);\n        uint256 leafPos = 0;\n        uint256 hashPos = 0;\n        uint256 proofPos = 0;\n        // At each step, we compute the next hash using two values:\n        // - a value from the \"main queue\". If not all leaves have been consumed, we get the next leaf, otherwise we\n        //   get the next hash.\n        // - depending on the flag, either another value from the \"main queue\" (merging branches) or an element from the\n        //   `proof` array.\n        for (uint256 i = 0; i < totalHashes; i++) {\n            bytes32 a = leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++];\n            bytes32 b = proofFlags[i]\n                ? (leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++])\n                : proof[proofPos++];\n            hashes[i] = _hashPair(a, b);\n        }\n\n        if (totalHashes > 0) {\n            require(proofPos == proofLen, \"MerkleProof: invalid multiproof\");\n            unchecked {\n                return hashes[totalHashes - 1];\n            }\n        } else if (leavesLen > 0) {\n            return leaves[0];\n        } else {\n            return proof[0];\n        }\n    }\n\n    /**\n     * @dev Calldata version of {processMultiProof}.\n     *\n     * CAUTION: Not all merkle trees admit multiproofs. See {processMultiProof} for details.\n     *\n     * _Available since v4.7._\n     */\n    function processMultiProofCalldata(\n        bytes32[] calldata proof,\n        bool[] calldata proofFlags,\n        bytes32[] memory leaves\n    ) internal pure returns (bytes32 merkleRoot) {\n        // This function rebuilds the root hash by traversing the tree up from the leaves. The root is rebuilt by\n        // consuming and producing values on a queue. The queue starts with the `leaves` array, then goes onto the\n        // `hashes` array. At the end of the process, the last hash in the `hashes` array should contain the root of\n        // the merkle tree.\n        uint256 leavesLen = leaves.length;\n        uint256 proofLen = proof.length;\n        uint256 totalHashes = proofFlags.length;\n\n        // Check proof validity.\n        require(leavesLen + proofLen - 1 == totalHashes, \"MerkleProof: invalid multiproof\");\n\n        // The xxxPos values are \"pointers\" to the next value to consume in each array. All accesses are done using\n        // `xxx[xxxPos++]`, which return the current value and increment the pointer, thus mimicking a queue's \"pop\".\n        bytes32[] memory hashes = new bytes32[](totalHashes);\n        uint256 leafPos = 0;\n        uint256 hashPos = 0;\n        uint256 proofPos = 0;\n        // At each step, we compute the next hash using two values:\n        // - a value from the \"main queue\". If not all leaves have been consumed, we get the next leaf, otherwise we\n        //   get the next hash.\n        // - depending on the flag, either another value from the \"main queue\" (merging branches) or an element from the\n        //   `proof` array.\n        for (uint256 i = 0; i < totalHashes; i++) {\n            bytes32 a = leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++];\n            bytes32 b = proofFlags[i]\n                ? (leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++])\n                : proof[proofPos++];\n            hashes[i] = _hashPair(a, b);\n        }\n\n        if (totalHashes > 0) {\n            require(proofPos == proofLen, \"MerkleProof: invalid multiproof\");\n            unchecked {\n                return hashes[totalHashes - 1];\n            }\n        } else if (leavesLen > 0) {\n            return leaves[0];\n        } else {\n            return proof[0];\n        }\n    }\n\n    function _hashPair(bytes32 a, bytes32 b) private pure returns (bytes32) {\n        return a < b ? _efficientHash(a, b) : _efficientHash(b, a);\n    }\n\n    function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) {\n        /// @solidity memory-safe-assembly\n        assembly {\n            mstore(0x00, a)\n            mstore(0x20, b)\n            value := keccak256(0x00, 0x40)\n        }\n    }\n}\n"
      },
      "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../IERC20.sol\";\nimport \"../extensions/IERC20Permit.sol\";\nimport \"../../../utils/Address.sol\";\n\n/**\n * @title SafeERC20\n * @dev Wrappers around ERC20 operations that throw on failure (when the token\n * contract returns false). Tokens that return no value (and instead revert or\n * throw on failure) are also supported, non-reverting calls are assumed to be\n * successful.\n * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,\n * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.\n */\nlibrary SafeERC20 {\n    using Address for address;\n\n    /**\n     * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,\n     * non-reverting calls are assumed to be successful.\n     */\n    function safeTransfer(IERC20 token, address to, uint256 value) internal {\n        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));\n    }\n\n    /**\n     * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the\n     * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.\n     */\n    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {\n        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));\n    }\n\n    /**\n     * @dev Deprecated. This function has issues similar to the ones found in\n     * {IERC20-approve}, and its usage is discouraged.\n     *\n     * Whenever possible, use {safeIncreaseAllowance} and\n     * {safeDecreaseAllowance} instead.\n     */\n    function safeApprove(IERC20 token, address spender, uint256 value) internal {\n        // safeApprove should only be called when setting an initial allowance,\n        // or when resetting it to zero. To increase and decrease it, use\n        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'\n        require(\n            (value == 0) || (token.allowance(address(this), spender) == 0),\n            \"SafeERC20: approve from non-zero to non-zero allowance\"\n        );\n        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));\n    }\n\n    /**\n     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,\n     * non-reverting calls are assumed to be successful.\n     */\n    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {\n        uint256 oldAllowance = token.allowance(address(this), spender);\n        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value));\n    }\n\n    /**\n     * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,\n     * non-reverting calls are assumed to be successful.\n     */\n    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {\n        unchecked {\n            uint256 oldAllowance = token.allowance(address(this), spender);\n            require(oldAllowance >= value, \"SafeERC20: decreased allowance below zero\");\n            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));\n        }\n    }\n\n    /**\n     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,\n     * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval\n     * to be set to zero before setting it to a non-zero value, such as USDT.\n     */\n    function forceApprove(IERC20 token, address spender, uint256 value) internal {\n        bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);\n\n        if (!_callOptionalReturnBool(token, approvalCall)) {\n            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0));\n            _callOptionalReturn(token, approvalCall);\n        }\n    }\n\n    /**\n     * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.\n     * Revert on invalid signature.\n     */\n    function safePermit(\n        IERC20Permit token,\n        address owner,\n        address spender,\n        uint256 value,\n        uint256 deadline,\n        uint8 v,\n        bytes32 r,\n        bytes32 s\n    ) internal {\n        uint256 nonceBefore = token.nonces(owner);\n        token.permit(owner, spender, value, deadline, v, r, s);\n        uint256 nonceAfter = token.nonces(owner);\n        require(nonceAfter == nonceBefore + 1, \"SafeERC20: permit did not succeed\");\n    }\n\n    /**\n     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement\n     * on the return value: the return value is optional (but if data is returned, it must not be false).\n     * @param token The token targeted by the call.\n     * @param data The call data (encoded using abi.encode or one of its variants).\n     */\n    function _callOptionalReturn(IERC20 token, bytes memory data) private {\n        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since\n        // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that\n        // the target address contains contract code and also asserts for success in the low-level call.\n\n        bytes memory returndata = address(token).functionCall(data, \"SafeERC20: low-level call failed\");\n        require(returndata.length == 0 || abi.decode(returndata, (bool)), \"SafeERC20: ERC20 operation did not succeed\");\n    }\n\n    /**\n     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement\n     * on the return value: the return value is optional (but if data is returned, it must not be false).\n     * @param token The token targeted by the call.\n     * @param data The call data (encoded using abi.encode or one of its variants).\n     *\n     * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.\n     */\n    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {\n        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since\n        // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false\n        // and not revert is the subcall reverts.\n\n        (bool success, bytes memory returndata) = address(token).call(data);\n        return\n            success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token));\n    }\n}\n"
      },
      "erc721a/contracts/extensions/IERC721AQueryable.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// ERC721A Contracts v4.2.3\n// Creator: Chiru Labs\n\npragma solidity ^0.8.4;\n\nimport '../IERC721A.sol';\n\n/**\n * @dev Interface of ERC721AQueryable.\n */\ninterface IERC721AQueryable is IERC721A {\n    /**\n     * Invalid query range (`start` >= `stop`).\n     */\n    error InvalidQueryRange();\n\n    /**\n     * @dev Returns the `TokenOwnership` struct at `tokenId` without reverting.\n     *\n     * If the `tokenId` is out of bounds:\n     *\n     * - `addr = address(0)`\n     * - `startTimestamp = 0`\n     * - `burned = false`\n     * - `extraData = 0`\n     *\n     * If the `tokenId` is burned:\n     *\n     * - `addr = <Address of owner before token was burned>`\n     * - `startTimestamp = <Timestamp when token was burned>`\n     * - `burned = true`\n     * - `extraData = <Extra data when token was burned>`\n     *\n     * Otherwise:\n     *\n     * - `addr = <Address of owner>`\n     * - `startTimestamp = <Timestamp of start of ownership>`\n     * - `burned = false`\n     * - `extraData = <Extra data at start of ownership>`\n     */\n    function explicitOwnershipOf(uint256 tokenId) external view returns (TokenOwnership memory);\n\n    /**\n     * @dev Returns an array of `TokenOwnership` structs at `tokenIds` in order.\n     * See {ERC721AQueryable-explicitOwnershipOf}\n     */\n    function explicitOwnershipsOf(uint256[] memory tokenIds) external view returns (TokenOwnership[] memory);\n\n    /**\n     * @dev Returns an array of token IDs owned by `owner`,\n     * in the range [`start`, `stop`)\n     * (i.e. `start <= tokenId < stop`).\n     *\n     * This function allows for tokens to be queried if the collection\n     * grows too big for a single call of {ERC721AQueryable-tokensOfOwner}.\n     *\n     * Requirements:\n     *\n     * - `start < stop`\n     */\n    function tokensOfOwnerIn(\n        address owner,\n        uint256 start,\n        uint256 stop\n    ) external view returns (uint256[] memory);\n\n    /**\n     * @dev Returns an array of token IDs owned by `owner`.\n     *\n     * This function scans the ownership mapping and is O(`totalSupply`) in complexity.\n     * It is meant to be called off-chain.\n     *\n     * See {ERC721AQueryable-tokensOfOwnerIn} for splitting the scan into\n     * multiple smaller scans if the collection is large enough to cause\n     * an out-of-gas error (10K collections should be fine).\n     */\n    function tokensOfOwner(address owner) external view returns (uint256[] memory);\n}\n"
      },
      "erc721a/contracts/IERC721A.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// ERC721A Contracts v4.2.3\n// Creator: Chiru Labs\n\npragma solidity ^0.8.4;\n\n/**\n * @dev Interface of ERC721A.\n */\ninterface IERC721A {\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     * 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\n     * 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    /**\n     * The `quantity` minted with ERC2309 exceeds the safety limit.\n     */\n    error MintERC2309QuantityExceedsLimit();\n\n    /**\n     * The `extraData` cannot be set on an unintialized ownership slot.\n     */\n    error OwnershipNotInitializedForExtraData();\n\n    // =============================================================\n    //                            STRUCTS\n    // =============================================================\n\n    struct TokenOwnership {\n        // The address of the owner.\n        address addr;\n        // Stores the start time of ownership with minimal overhead for tokenomics.\n        uint64 startTimestamp;\n        // Whether the token has been burned.\n        bool burned;\n        // Arbitrary data similar to `startTimestamp` that can be set via {_extraData}.\n        uint24 extraData;\n    }\n\n    // =============================================================\n    //                         TOKEN COUNTERS\n    // =============================================================\n\n    /**\n     * @dev Returns the total number of tokens in existence.\n     * Burned tokens will reduce the count.\n     * To get the total number of tokens minted, please see {_totalMinted}.\n     */\n    function totalSupply() external view returns (uint256);\n\n    // =============================================================\n    //                            IERC165\n    // =============================================================\n\n    /**\n     * @dev Returns true if this contract implements the interface defined by\n     * `interfaceId`. See the corresponding\n     * [EIP section](https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified)\n     * to learn more about how these ids are created.\n     *\n     * This function call must use less than 30000 gas.\n     */\n    function supportsInterface(bytes4 interfaceId) external view returns (bool);\n\n    // =============================================================\n    //                            IERC721\n    // =============================================================\n\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\n     * (`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     * checking first that contract recipients are aware of the ERC721 protocol\n     * 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\n     * this token by either {approve} or {setApprovalForAll}.\n     * - If `to` refers to a smart contract, it must implement\n     * {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 payable;\n\n    /**\n     * @dev Equivalent to `safeTransferFrom(from, to, tokenId, '')`.\n     */\n    function safeTransferFrom(\n        address from,\n        address to,\n        uint256 tokenId\n    ) external payable;\n\n    /**\n     * @dev Transfers `tokenId` from `from` to `to`.\n     *\n     * WARNING: Usage of this method is discouraged, use {safeTransferFrom}\n     * 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\n     * 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 payable;\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\n     * 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 payable;\n\n    /**\n     * @dev Approve or remove `operator` as an operator for the caller.\n     * Operators can call {transferFrom} or {safeTransferFrom}\n     * 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    // =============================================================\n    //                        IERC721Metadata\n    // =============================================================\n\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    // =============================================================\n    //                           IERC2309\n    // =============================================================\n\n    /**\n     * @dev Emitted when tokens in `fromTokenId` to `toTokenId`\n     * (inclusive) is transferred from `from` to `to`, as defined in the\n     * [ERC2309](https://eips.ethereum.org/EIPS/eip-2309) standard.\n     *\n     * See {_mintERC2309} for more details.\n     */\n    event ConsecutiveTransfer(uint256 indexed fromTokenId, uint256 toTokenId, address indexed from, address indexed to);\n}\n"
      },
      "contracts/creator-token-standards/CreatorTokenBase.sol": {
        "content": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.4;\n\nimport \"@limitbreak/creator-token-standards/src/access/OwnablePermissions.sol\";\nimport \"@limitbreak/creator-token-standards/src/interfaces/ICreatorToken.sol\";\nimport \"@limitbreak/creator-token-standards/src/interfaces/ICreatorTokenTransferValidator.sol\";\nimport \"@limitbreak/creator-token-standards/src/utils/TransferValidation.sol\";\nimport \"@openzeppelin/contracts/interfaces/IERC165.sol\";\n\n/**\n * @title CreatorTokenBase\n * @author Limit Break, Inc.\n * @notice CreatorTokenBase is an abstract contract that provides basic functionality for managing token\n * transfer policies through an implementation of ICreatorTokenTransferValidator. This contract is intended to be used\n * as a base for creator-specific token contracts, enabling customizable transfer restrictions and security policies.\n *\n * <h4>Features:</h4>\n * <ul>Ownable: This contract can have an owner who can set and update the transfer validator.</ul>\n * <ul>TransferValidation: Implements the basic token transfer validation interface.</ul>\n * <ul>ICreatorToken: Implements the interface for creator tokens, providing view functions for token security policies.</ul>\n *\n * <h4>Benefits:</h4>\n * <ul>Provides a flexible and modular way to implement custom token transfer restrictions and security policies.</ul>\n * <ul>Allows creators to enforce policies such as whitelisted operators and permitted contract receivers.</ul>\n * <ul>Can be easily integrated into other token contracts as a base contract.</ul>\n *\n * <h4>Intended Usage:</h4>\n * <ul>Use as a base contract for creator token implementations that require advanced transfer restrictions and\n *   security policies.</ul>\n * <ul>Set and update the ICreatorTokenTransferValidator implementation contract to enforce desired policies for the\n *   creator token.</ul>\n */\nabstract contract CreatorTokenBase is\n    OwnablePermissions,\n    TransferValidation,\n    ICreatorToken\n{\n    /**\n     * @dev Thrown when the transfer validator address is the zero address\n     * @dev or it does not implement the `ICreatorTokenTransferValidator` interface.\n     */\n    error CreatorTokenBase__InvalidTransferValidatorContract();\n\n    /// @dev Thrown when attempting to set transfer security settings before a transfer validator is set.\n    error CreatorTokenBase__SetTransferValidatorFirst();\n\n    /// @dev The default transfer validator address for calls to `setToDefaultSecurityPolicy`.\n    address public constant DEFAULT_TRANSFER_VALIDATOR =\n        address(0x721C00182a990771244d7A71B9FA2ea789A3b433);\n\n    /// @dev The default transfer security level for calls to `setToDefaultSecurityPolicy`.\n    TransferSecurityLevels public constant DEFAULT_TRANSFER_SECURITY_LEVEL =\n        TransferSecurityLevels.Two;\n\n    /// @dev The default operator whitelist id for calls to `setToDefaultSecurityPolicy`.\n    uint120 public constant DEFAULT_OPERATOR_WHITELIST_ID = uint120(1);\n\n    ICreatorTokenTransferValidator private transferValidator;\n\n    /**\n     * @notice Allows the contract owner to set the transfer validator to the official validator contract\n     *         and set the security policy to the recommended default settings.\n     * @dev    May be overridden to change the default behavior of an individual collection.\n     */\n    function setToDefaultSecurityPolicy() public virtual {\n        _requireCallerIsContractOwner();\n        setTransferValidator(DEFAULT_TRANSFER_VALIDATOR);\n        ICreatorTokenTransferValidator(DEFAULT_TRANSFER_VALIDATOR)\n            .setTransferSecurityLevelOfCollection(\n                address(this),\n                DEFAULT_TRANSFER_SECURITY_LEVEL\n            );\n        ICreatorTokenTransferValidator(DEFAULT_TRANSFER_VALIDATOR)\n            .setOperatorWhitelistOfCollection(\n                address(this),\n                DEFAULT_OPERATOR_WHITELIST_ID\n            );\n    }\n\n    /**\n     * @notice Allows the contract owner to set the transfer validator to a custom validator contract\n     *         and set the security policy to their own custom settings.\n     */\n    function setToCustomValidatorAndSecurityPolicy(\n        address validator,\n        TransferSecurityLevels level,\n        uint120 operatorWhitelistId,\n        uint120 permittedContractReceiversAllowlistId\n    ) public {\n        _requireCallerIsContractOwner();\n\n        setTransferValidator(validator);\n\n        ICreatorTokenTransferValidator(validator)\n            .setTransferSecurityLevelOfCollection(address(this), level);\n\n        ICreatorTokenTransferValidator(validator)\n            .setOperatorWhitelistOfCollection(\n                address(this),\n                operatorWhitelistId\n            );\n\n        ICreatorTokenTransferValidator(validator)\n            .setPermittedContractReceiverAllowlistOfCollection(\n                address(this),\n                permittedContractReceiversAllowlistId\n            );\n    }\n\n    /**\n     * @notice Allows the contract owner to set the security policy to their own custom settings.\n     * @dev    Reverts if the transfer validator has not been set.\n     */\n    function setToCustomSecurityPolicy(\n        TransferSecurityLevels level,\n        uint120 operatorWhitelistId,\n        uint120 permittedContractReceiversAllowlistId\n    ) public {\n        _requireCallerIsContractOwner();\n\n        ICreatorTokenTransferValidator validator = getTransferValidator();\n        if (address(validator) == address(0)) {\n            revert CreatorTokenBase__SetTransferValidatorFirst();\n        }\n\n        validator.setTransferSecurityLevelOfCollection(address(this), level);\n        validator.setOperatorWhitelistOfCollection(\n            address(this),\n            operatorWhitelistId\n        );\n        validator.setPermittedContractReceiverAllowlistOfCollection(\n            address(this),\n            permittedContractReceiversAllowlistId\n        );\n    }\n\n    /**\n     * @notice Sets the transfer validator for the token contract.\n     *\n     * @dev    Throws when provided validator contract is not the zero address and doesn't support\n     *         the ICreatorTokenTransferValidator interface.\n     * @dev    Throws when the caller is not the contract owner.\n     *\n     * @dev    <h4>Postconditions:</h4>\n     *         1. The transferValidator address is updated.\n     *         2. The `TransferValidatorUpdated` event is emitted.\n     *\n     * @param transferValidator_ The address of the transfer validator contract.\n     */\n    function setTransferValidator(address transferValidator_) public {\n        _requireCallerIsContractOwner();\n\n        bool isValidTransferValidator = false;\n\n        if (transferValidator_.code.length > 0) {\n            try\n                IERC165(transferValidator_).supportsInterface(\n                    type(ICreatorTokenTransferValidator).interfaceId\n                )\n            returns (bool supportsInterface) {\n                isValidTransferValidator = supportsInterface;\n            } catch {}\n        }\n\n        if (transferValidator_ != address(0) && !isValidTransferValidator) {\n            revert CreatorTokenBase__InvalidTransferValidatorContract();\n        }\n\n        emit TransferValidatorUpdated(\n            address(transferValidator),\n            transferValidator_\n        );\n\n        transferValidator = ICreatorTokenTransferValidator(transferValidator_);\n    }\n\n    /**\n     * @notice Returns the transfer validator contract address for this token contract.\n     */\n    function getTransferValidator()\n        public\n        view\n        override\n        returns (ICreatorTokenTransferValidator)\n    {\n        return transferValidator;\n    }\n\n    /**\n     * @notice Returns the security policy for this token contract, which includes:\n     *         Transfer security level, operator whitelist id, permitted contract receiver allowlist id.\n     */\n    function getSecurityPolicy()\n        public\n        view\n        override\n        returns (CollectionSecurityPolicy memory)\n    {\n        if (address(transferValidator) != address(0)) {\n            return transferValidator.getCollectionSecurityPolicy(address(this));\n        }\n\n        return\n            CollectionSecurityPolicy({\n                transferSecurityLevel: TransferSecurityLevels.Recommended,\n                operatorWhitelistId: 0,\n                permittedContractReceiversId: 0\n            });\n    }\n\n    /**\n     * @notice Returns the list of all whitelisted operators for this token contract.\n     * @dev    This can be an expensive call and should only be used in view-only functions.\n     */\n    function getWhitelistedOperators()\n        public\n        view\n        override\n        returns (address[] memory)\n    {\n        if (address(transferValidator) != address(0)) {\n            return\n                transferValidator.getWhitelistedOperators(\n                    transferValidator\n                        .getCollectionSecurityPolicy(address(this))\n                        .operatorWhitelistId\n                );\n        }\n\n        return new address[](0);\n    }\n\n    /**\n     * @notice Returns the list of permitted contract receivers for this token contract.\n     * @dev    This can be an expensive call and should only be used in view-only functions.\n     */\n    function getPermittedContractReceivers()\n        public\n        view\n        override\n        returns (address[] memory)\n    {\n        if (address(transferValidator) != address(0)) {\n            return\n                transferValidator.getPermittedContractReceivers(\n                    transferValidator\n                        .getCollectionSecurityPolicy(address(this))\n                        .permittedContractReceiversId\n                );\n        }\n\n        return new address[](0);\n    }\n\n    /**\n     * @notice Checks if an operator is whitelisted for this token contract.\n     * @param operator The address of the operator to check.\n     */\n    function isOperatorWhitelisted(\n        address operator\n    ) public view override returns (bool) {\n        if (address(transferValidator) != address(0)) {\n            return\n                transferValidator.isOperatorWhitelisted(\n                    transferValidator\n                        .getCollectionSecurityPolicy(address(this))\n                        .operatorWhitelistId,\n                    operator\n                );\n        }\n\n        return false;\n    }\n\n    /**\n     * @notice Checks if a contract receiver is permitted for this token contract.\n     * @param receiver The address of the receiver to check.\n     */\n    function isContractReceiverPermitted(\n        address receiver\n    ) public view override returns (bool) {\n        if (address(transferValidator) != address(0)) {\n            return\n                transferValidator.isContractReceiverPermitted(\n                    transferValidator\n                        .getCollectionSecurityPolicy(address(this))\n                        .permittedContractReceiversId,\n                    receiver\n                );\n        }\n\n        return false;\n    }\n\n    /**\n     * @notice Determines if a transfer is allowed based on the token contract's security policy.  Use this function\n     *         to simulate whether or not a transfer made by the specified `caller` from the `from` address to the `to`\n     *         address would be allowed by this token's security policy.\n     *\n     * @notice This function only checks the security policy restrictions and does not check whether token ownership\n     *         or approvals are in place.\n     *\n     * @param caller The address of the simulated caller.\n     * @param from   The address of the sender.\n     * @param to     The address of the receiver.\n     * @return       True if the transfer is allowed, false otherwise.\n     */\n    function isTransferAllowed(\n        address caller,\n        address from,\n        address to\n    ) public view override returns (bool) {\n        if (address(transferValidator) != address(0)) {\n            try\n                transferValidator.applyCollectionTransferPolicy(\n                    caller,\n                    from,\n                    to\n                )\n            {\n                return true;\n            } catch {\n                return false;\n            }\n        }\n        return true;\n    }\n\n    /**\n     * @dev Pre-validates a token transfer, reverting if the transfer is not allowed by this token's security policy.\n     *      Inheriting contracts are responsible for overriding the _beforeTokenTransfer function, or its equivalent\n     *      and calling _validateBeforeTransfer so that checks can be properly applied during token transfers.\n     *\n     * @dev Throws when the transfer doesn't comply with the collection's transfer policy, if the transferValidator is\n     *      set to a non-zero address.\n     *\n     * @param caller  The address of the caller.\n     * @param from    The address of the sender.\n     * @param to      The address of the receiver.\n     */\n    function _preValidateTransfer(\n        address caller,\n        address from,\n        address to,\n        uint256 /*tokenId*/,\n        uint256 /*value*/\n    ) internal virtual override {\n        if (address(transferValidator) != address(0)) {\n            transferValidator.applyCollectionTransferPolicy(caller, from, to);\n        }\n    }\n}\n"
      },
      "erc721a/contracts/extensions/ERC721AQueryable.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// ERC721A Contracts v4.2.3\n// Creator: Chiru Labs\n\npragma solidity ^0.8.4;\n\nimport './IERC721AQueryable.sol';\nimport '../ERC721A.sol';\n\n/**\n * @title ERC721AQueryable.\n *\n * @dev ERC721A subclass with convenience query functions.\n */\nabstract contract ERC721AQueryable is ERC721A, IERC721AQueryable {\n    /**\n     * @dev Returns the `TokenOwnership` struct at `tokenId` without reverting.\n     *\n     * If the `tokenId` is out of bounds:\n     *\n     * - `addr = address(0)`\n     * - `startTimestamp = 0`\n     * - `burned = false`\n     * - `extraData = 0`\n     *\n     * If the `tokenId` is burned:\n     *\n     * - `addr = <Address of owner before token was burned>`\n     * - `startTimestamp = <Timestamp when token was burned>`\n     * - `burned = true`\n     * - `extraData = <Extra data when token was burned>`\n     *\n     * Otherwise:\n     *\n     * - `addr = <Address of owner>`\n     * - `startTimestamp = <Timestamp of start of ownership>`\n     * - `burned = false`\n     * - `extraData = <Extra data at start of ownership>`\n     */\n    function explicitOwnershipOf(uint256 tokenId) public view virtual override returns (TokenOwnership memory) {\n        TokenOwnership memory ownership;\n        if (tokenId < _startTokenId() || tokenId >= _nextTokenId()) {\n            return ownership;\n        }\n        ownership = _ownershipAt(tokenId);\n        if (ownership.burned) {\n            return ownership;\n        }\n        return _ownershipOf(tokenId);\n    }\n\n    /**\n     * @dev Returns an array of `TokenOwnership` structs at `tokenIds` in order.\n     * See {ERC721AQueryable-explicitOwnershipOf}\n     */\n    function explicitOwnershipsOf(uint256[] calldata tokenIds)\n        external\n        view\n        virtual\n        override\n        returns (TokenOwnership[] memory)\n    {\n        unchecked {\n            uint256 tokenIdsLength = tokenIds.length;\n            TokenOwnership[] memory ownerships = new TokenOwnership[](tokenIdsLength);\n            for (uint256 i; i != tokenIdsLength; ++i) {\n                ownerships[i] = explicitOwnershipOf(tokenIds[i]);\n            }\n            return ownerships;\n        }\n    }\n\n    /**\n     * @dev Returns an array of token IDs owned by `owner`,\n     * in the range [`start`, `stop`)\n     * (i.e. `start <= tokenId < stop`).\n     *\n     * This function allows for tokens to be queried if the collection\n     * grows too big for a single call of {ERC721AQueryable-tokensOfOwner}.\n     *\n     * Requirements:\n     *\n     * - `start < stop`\n     */\n    function tokensOfOwnerIn(\n        address owner,\n        uint256 start,\n        uint256 stop\n    ) external view virtual override returns (uint256[] memory) {\n        unchecked {\n            if (start >= stop) revert InvalidQueryRange();\n            uint256 tokenIdsIdx;\n            uint256 stopLimit = _nextTokenId();\n            // Set `start = max(start, _startTokenId())`.\n            if (start < _startTokenId()) {\n                start = _startTokenId();\n            }\n            // Set `stop = min(stop, stopLimit)`.\n            if (stop > stopLimit) {\n                stop = stopLimit;\n            }\n            uint256 tokenIdsMaxLength = balanceOf(owner);\n            // Set `tokenIdsMaxLength = min(balanceOf(owner), stop - start)`,\n            // to cater for cases where `balanceOf(owner)` is too big.\n            if (start < stop) {\n                uint256 rangeLength = stop - start;\n                if (rangeLength < tokenIdsMaxLength) {\n                    tokenIdsMaxLength = rangeLength;\n                }\n            } else {\n                tokenIdsMaxLength = 0;\n            }\n            uint256[] memory tokenIds = new uint256[](tokenIdsMaxLength);\n            if (tokenIdsMaxLength == 0) {\n                return tokenIds;\n            }\n            // We need to call `explicitOwnershipOf(start)`,\n            // because the slot at `start` may not be initialized.\n            TokenOwnership memory ownership = explicitOwnershipOf(start);\n            address currOwnershipAddr;\n            // If the starting slot exists (i.e. not burned), initialize `currOwnershipAddr`.\n            // `ownership.address` will not be zero, as `start` is clamped to the valid token ID range.\n            if (!ownership.burned) {\n                currOwnershipAddr = ownership.addr;\n            }\n            for (uint256 i = start; i != stop && tokenIdsIdx != tokenIdsMaxLength; ++i) {\n                ownership = _ownershipAt(i);\n                if (ownership.burned) {\n                    continue;\n                }\n                if (ownership.addr != address(0)) {\n                    currOwnershipAddr = ownership.addr;\n                }\n                if (currOwnershipAddr == owner) {\n                    tokenIds[tokenIdsIdx++] = i;\n                }\n            }\n            // Downsize the array to fit.\n            assembly {\n                mstore(tokenIds, tokenIdsIdx)\n            }\n            return tokenIds;\n        }\n    }\n\n    /**\n     * @dev Returns an array of token IDs owned by `owner`.\n     *\n     * This function scans the ownership mapping and is O(`totalSupply`) in complexity.\n     * It is meant to be called off-chain.\n     *\n     * See {ERC721AQueryable-tokensOfOwnerIn} for splitting the scan into\n     * multiple smaller scans if the collection is large enough to cause\n     * an out-of-gas error (10K collections should be fine).\n     */\n    function tokensOfOwner(address owner) external view virtual override returns (uint256[] memory) {\n        unchecked {\n            uint256 tokenIdsIdx;\n            address currOwnershipAddr;\n            uint256 tokenIdsLength = balanceOf(owner);\n            uint256[] memory tokenIds = new uint256[](tokenIdsLength);\n            TokenOwnership memory ownership;\n            for (uint256 i = _startTokenId(); tokenIdsIdx != tokenIdsLength; ++i) {\n                ownership = _ownershipAt(i);\n                if (ownership.burned) {\n                    continue;\n                }\n                if (ownership.addr != address(0)) {\n                    currOwnershipAddr = ownership.addr;\n                }\n                if (currOwnershipAddr == owner) {\n                    tokenIds[tokenIdsIdx++] = i;\n                }\n            }\n            return tokenIds;\n        }\n    }\n}\n"
      },
      "@limitbreak/creator-token-standards/src/access/OwnablePermissions.sol": {
        "content": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.4;\n\nimport \"@openzeppelin/contracts/utils/Context.sol\";\n\nabstract contract OwnablePermissions is Context {\n    function _requireCallerIsContractOwner() internal view virtual;\n}\n"
      },
      "@limitbreak/creator-token-standards/src/utils/TransferValidation.sol": {
        "content": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.4;\n\nimport \"@openzeppelin/contracts/utils/Context.sol\";\n\n/**\n * @title TransferValidation\n * @author Limit Break, Inc.\n * @notice A mix-in that can be combined with ERC-721 contracts to provide more granular hooks.\n * Openzeppelin's ERC721 contract only provides hooks for before and after transfer.  This allows\n * developers to validate or customize transfers within the context of a mint, a burn, or a transfer.\n */\nabstract contract TransferValidation is Context {\n    \n    /// @dev Thrown when the from and to address are both the zero address.\n    error ShouldNotMintToBurnAddress();\n\n    /// @dev Inheriting contracts should call this function in the _beforeTokenTransfer function to get more granular hooks.\n    function _validateBeforeTransfer(address from, address to, uint256 tokenId) internal virtual {\n        bool fromZeroAddress = from == address(0);\n        bool toZeroAddress = to == address(0);\n\n        if(fromZeroAddress && toZeroAddress) {\n            revert ShouldNotMintToBurnAddress();\n        } else if(fromZeroAddress) {\n            _preValidateMint(_msgSender(), to, tokenId, msg.value);\n        } else if(toZeroAddress) {\n            _preValidateBurn(_msgSender(), from, tokenId, msg.value);\n        } else {\n            _preValidateTransfer(_msgSender(), from, to, tokenId, msg.value);\n        }\n    }\n\n    /// @dev Inheriting contracts should call this function in the _afterTokenTransfer function to get more granular hooks.\n    function _validateAfterTransfer(address from, address to, uint256 tokenId) internal virtual {\n        bool fromZeroAddress = from == address(0);\n        bool toZeroAddress = to == address(0);\n\n        if(fromZeroAddress && toZeroAddress) {\n            revert ShouldNotMintToBurnAddress();\n        } else if(fromZeroAddress) {\n            _postValidateMint(_msgSender(), to, tokenId, msg.value);\n        } else if(toZeroAddress) {\n            _postValidateBurn(_msgSender(), from, tokenId, msg.value);\n        } else {\n            _postValidateTransfer(_msgSender(), from, to, tokenId, msg.value);\n        }\n    }\n\n    /// @dev Optional validation hook that fires before a mint\n    function _preValidateMint(address caller, address to, uint256 tokenId, uint256 value) internal virtual {}\n\n    /// @dev Optional validation hook that fires after a mint\n    function _postValidateMint(address caller, address to, uint256 tokenId, uint256 value) internal virtual {}\n\n    /// @dev Optional validation hook that fires before a burn\n    function _preValidateBurn(address caller, address from, uint256 tokenId, uint256 value) internal virtual {}\n\n    /// @dev Optional validation hook that fires after a burn\n    function _postValidateBurn(address caller, address from, uint256 tokenId, uint256 value) internal virtual {}\n\n    /// @dev Optional validation hook that fires before a transfer\n    function _preValidateTransfer(address caller, address from, address to, uint256 tokenId, uint256 value) internal virtual {}\n\n    /// @dev Optional validation hook that fires after a transfer\n    function _postValidateTransfer(address caller, address from, address to, uint256 tokenId, uint256 value) internal virtual {}\n}\n"
      },
      "@limitbreak/creator-token-standards/src/interfaces/ICreatorTokenTransferValidator.sol": {
        "content": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.4;\n\nimport \"./IEOARegistry.sol\";\nimport \"./ITransferSecurityRegistry.sol\";\nimport \"./ITransferValidator.sol\";\n\ninterface ICreatorTokenTransferValidator is ITransferSecurityRegistry, ITransferValidator, IEOARegistry {}"
      },
      "@limitbreak/creator-token-standards/src/interfaces/ICreatorToken.sol": {
        "content": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.4;\n\nimport \"./ICreatorTokenTransferValidator.sol\";\n\ninterface ICreatorToken {\n    event TransferValidatorUpdated(address oldValidator, address newValidator);\n\n    function getTransferValidator() external view returns (ICreatorTokenTransferValidator);\n    function getSecurityPolicy() external view returns (CollectionSecurityPolicy memory);\n    function getWhitelistedOperators() external view returns (address[] memory);\n    function getPermittedContractReceivers() external view returns (address[] memory);\n    function isOperatorWhitelisted(address operator) external view returns (bool);\n    function isContractReceiverPermitted(address receiver) external view returns (bool);\n    function isTransferAllowed(address caller, address from, address to) external view returns (bool);\n}\n"
      },
      "@openzeppelin/contracts/interfaces/IERC165.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (interfaces/IERC165.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../utils/introspection/IERC165.sol\";\n"
      },
      "@limitbreak/creator-token-standards/src/interfaces/IEOARegistry.sol": {
        "content": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.4;\n\nimport \"@openzeppelin/contracts/utils/introspection/IERC165.sol\";\n\ninterface IEOARegistry is IERC165 {\n    function isVerifiedEOA(address account) external view returns (bool);\n}"
      },
      "@limitbreak/creator-token-standards/src/interfaces/ITransferSecurityRegistry.sol": {
        "content": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.4;\n\nimport \"../utils/TransferPolicy.sol\";\n\ninterface ITransferSecurityRegistry {\n    event AddedToAllowlist(AllowlistTypes indexed kind, uint256 indexed id, address indexed account);\n    event CreatedAllowlist(AllowlistTypes indexed kind, uint256 indexed id, string indexed name);\n    event ReassignedAllowlistOwnership(AllowlistTypes indexed kind, uint256 indexed id, address indexed newOwner);\n    event RemovedFromAllowlist(AllowlistTypes indexed kind, uint256 indexed id, address indexed account);\n    event SetAllowlist(AllowlistTypes indexed kind, address indexed collection, uint120 indexed id);\n    event SetTransferSecurityLevel(address indexed collection, TransferSecurityLevels level);\n\n    function createOperatorWhitelist(string calldata name) external returns (uint120);\n    function createPermittedContractReceiverAllowlist(string calldata name) external returns (uint120);\n    function reassignOwnershipOfOperatorWhitelist(uint120 id, address newOwner) external;\n    function reassignOwnershipOfPermittedContractReceiverAllowlist(uint120 id, address newOwner) external;\n    function renounceOwnershipOfOperatorWhitelist(uint120 id) external;\n    function renounceOwnershipOfPermittedContractReceiverAllowlist(uint120 id) external;\n    function setTransferSecurityLevelOfCollection(address collection, TransferSecurityLevels level) external;\n    function setOperatorWhitelistOfCollection(address collection, uint120 id) external;\n    function setPermittedContractReceiverAllowlistOfCollection(address collection, uint120 id) external;\n    function addOperatorToWhitelist(uint120 id, address operator) external;\n    function addPermittedContractReceiverToAllowlist(uint120 id, address receiver) external;\n    function removeOperatorFromWhitelist(uint120 id, address operator) external;\n    function removePermittedContractReceiverFromAllowlist(uint120 id, address receiver) external;\n    function getCollectionSecurityPolicy(address collection) external view returns (CollectionSecurityPolicy memory);\n    function getWhitelistedOperators(uint120 id) external view returns (address[] memory);\n    function getPermittedContractReceivers(uint120 id) external view returns (address[] memory);\n    function isOperatorWhitelisted(uint120 id, address operator) external view returns (bool);\n    function isContractReceiverPermitted(uint120 id, address receiver) external view returns (bool);\n}"
      },
      "@limitbreak/creator-token-standards/src/interfaces/ITransferValidator.sol": {
        "content": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.4;\n\nimport \"../utils/TransferPolicy.sol\";\n\ninterface ITransferValidator {\n    function applyCollectionTransferPolicy(address caller, address from, address to) external view;\n}"
      },
      "@limitbreak/creator-token-standards/src/utils/TransferPolicy.sol": {
        "content": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.4;\n\n/** \n * @dev Used in events to indicate the list type that an account or \n * @dev codehash is being added to or removed from.\n * \n * @dev Used in Creator Token Standards V2.\n */\nenum ListTypes {\n    // 0: List type that will block a matching address/codehash that is on the list.\n    Blacklist,\n\n    // 1: List type that will block any matching address/codehash that is not on the list.\n    Whitelist\n}\n\n/** \n * @dev Used in events to indicate the list type that event relates to.\n * \n * @dev Used in Creator Token Standards V1.\n */\nenum AllowlistTypes {\n    // 0: List type that defines the allowed operator addresses.\n    Operators,\n\n    // 1: List type that defines the allowed contract receivers.\n    PermittedContractReceivers\n}\n\n/**\n @dev Defines the constraints that will be applied for receipt of tokens.\n */\nenum ReceiverConstraints {\n    // 0: Any address may receive tokens.\n    None,\n\n    // 1: Address must not have deployed bytecode.\n    NoCode,\n\n    // 2: Address must verify a signature with the EOA Registry to prove it is an EOA.\n    EOA\n}\n\n/**\n * @dev Defines the constraints that will be applied to the transfer caller.\n */\nenum CallerConstraints {\n    // 0: Any address may transfer tokens.\n    None,\n\n    // 1: Addresses and codehashes not on the blacklist may transfer tokens.\n    OperatorBlacklistEnableOTC,\n\n    // 2: Addresses and codehashes on the whitelist and the owner of the token may transfer tokens.\n    OperatorWhitelistEnableOTC,\n\n    // 3: Addresses and codehashes on the whitelist may transfer tokens.\n    OperatorWhitelistDisableOTC\n}\n\n/**\n * @dev Defines constraints for staking tokens in token wrapper contracts.\n */\nenum StakerConstraints {\n    // 0: No constraints applied to staker.\n    None,\n\n    // 1: Transaction originator must be the address that will receive the wrapped tokens.\n    CallerIsTxOrigin,\n\n    // 2: Address that will receive the wrapped tokens must be a verified EOA.\n    EOA\n}\n\n/**\n * @dev Used in both Creator Token Standards V1 and V2.\n * @dev Levels may have different transfer restrictions in V1 and V2. Refer to the \n * @dev Creator Token Transfer Validator implementation for the version being utilized\n * @dev to determine the effect of the selected level.\n */\nenum TransferSecurityLevels {\n    Recommended,\n    One,\n    Two,\n    Three,\n    Four,\n    Five,\n    Six,\n    Seven,\n    Eight\n}\n\n/**\n * @dev Defines the caller and receiver constraints for a transfer security level.\n * @dev Used in Creator Token Standards V1.\n * \n * @dev **callerConstraints**: The restrictions applied to the transfer caller.\n * @dev **receiverConstraints**: The restrictions applied to the transfer recipient.\n */\nstruct TransferSecurityPolicy {\n    CallerConstraints callerConstraints;\n    ReceiverConstraints receiverConstraints;\n}\n\n/**\n * @dev Defines the security policy for a token collection in Creator Token Standards V1.\n * \n * @dev **transferSecurityLevel**: The transfer security level set for the collection.\n * @dev **operatorWhitelistId**: The list id for the operator whitelist.\n * @dev **permittedContractReceiversId: The list id for the contracts that are allowed to receive tokens.\n */\nstruct CollectionSecurityPolicy {\n    TransferSecurityLevels transferSecurityLevel;\n    uint120 operatorWhitelistId;\n    uint120 permittedContractReceiversId;\n}\n\n/**\n * @dev Defines the security policy for a token collection in Creator Token Standards V2.\n * \n * @dev **transferSecurityLevel**: The transfer security level set for the collection.\n * @dev **listId**: The list id that contains the blacklist and whitelist to apply to the collection.\n */\nstruct CollectionSecurityPolicyV2 {\n    TransferSecurityLevels transferSecurityLevel;\n    uint120 listId;\n}\n\n/** \n * @dev Used internally in the Creator Token Base V2 contract to pack transfer validator configuration.\n * \n * @dev **isInitialized**: If not initialized by the collection owner or admin the default validator will be used.\n * @dev **version**: The transfer validator version.\n * @dev **transferValidator**: The address of the transfer validator to use for applying collection security settings.\n */\nstruct TransferValidatorReference {\n    bool isInitialized;\n    uint16 version;\n    address transferValidator;\n}"
      },
      "erc721a/contracts/ERC721A.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// ERC721A Contracts v4.2.3\n// Creator: Chiru Labs\n\npragma solidity ^0.8.4;\n\nimport './IERC721A.sol';\n\n/**\n * @dev Interface of ERC721 token receiver.\n */\ninterface ERC721A__IERC721Receiver {\n    function onERC721Received(\n        address operator,\n        address from,\n        uint256 tokenId,\n        bytes calldata data\n    ) external returns (bytes4);\n}\n\n/**\n * @title ERC721A\n *\n * @dev Implementation of the [ERC721](https://eips.ethereum.org/EIPS/eip-721)\n * Non-Fungible Token Standard, including the Metadata extension.\n * Optimized for lower gas during batch mints.\n *\n * Token IDs are minted in sequential order (e.g. 0, 1, 2, 3, ...)\n * starting from `_startTokenId()`.\n *\n * Assumptions:\n *\n * - An owner cannot have more than 2**64 - 1 (max value of uint64) of supply.\n * - The maximum token ID cannot exceed 2**256 - 1 (max value of uint256).\n */\ncontract ERC721A is IERC721A {\n    // Bypass for a `--via-ir` bug (https://github.com/chiru-labs/ERC721A/pull/364).\n    struct TokenApprovalRef {\n        address value;\n    }\n\n    // =============================================================\n    //                           CONSTANTS\n    // =============================================================\n\n    // Mask of an entry in packed address data.\n    uint256 private constant _BITMASK_ADDRESS_DATA_ENTRY = (1 << 64) - 1;\n\n    // The bit position of `numberMinted` in packed address data.\n    uint256 private constant _BITPOS_NUMBER_MINTED = 64;\n\n    // The bit position of `numberBurned` in packed address data.\n    uint256 private constant _BITPOS_NUMBER_BURNED = 128;\n\n    // The bit position of `aux` in packed address data.\n    uint256 private constant _BITPOS_AUX = 192;\n\n    // Mask of all 256 bits in packed address data except the 64 bits for `aux`.\n    uint256 private constant _BITMASK_AUX_COMPLEMENT = (1 << 192) - 1;\n\n    // The bit position of `startTimestamp` in packed ownership.\n    uint256 private constant _BITPOS_START_TIMESTAMP = 160;\n\n    // The bit mask of the `burned` bit in packed ownership.\n    uint256 private constant _BITMASK_BURNED = 1 << 224;\n\n    // The bit position of the `nextInitialized` bit in packed ownership.\n    uint256 private constant _BITPOS_NEXT_INITIALIZED = 225;\n\n    // The bit mask of the `nextInitialized` bit in packed ownership.\n    uint256 private constant _BITMASK_NEXT_INITIALIZED = 1 << 225;\n\n    // The bit position of `extraData` in packed ownership.\n    uint256 private constant _BITPOS_EXTRA_DATA = 232;\n\n    // Mask of all 256 bits in a packed ownership except the 24 bits for `extraData`.\n    uint256 private constant _BITMASK_EXTRA_DATA_COMPLEMENT = (1 << 232) - 1;\n\n    // The mask of the lower 160 bits for addresses.\n    uint256 private constant _BITMASK_ADDRESS = (1 << 160) - 1;\n\n    // The maximum `quantity` that can be minted with {_mintERC2309}.\n    // This limit is to prevent overflows on the address data entries.\n    // For a limit of 5000, a total of 3.689e15 calls to {_mintERC2309}\n    // is required to cause an overflow, which is unrealistic.\n    uint256 private constant _MAX_MINT_ERC2309_QUANTITY_LIMIT = 5000;\n\n    // The `Transfer` event signature is given by:\n    // `keccak256(bytes(\"Transfer(address,address,uint256)\"))`.\n    bytes32 private constant _TRANSFER_EVENT_SIGNATURE =\n        0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef;\n\n    // =============================================================\n    //                            STORAGE\n    // =============================================================\n\n    // The next token ID to be minted.\n    uint256 private _currentIndex;\n\n    // The number of tokens burned.\n    uint256 private _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.\n    // See {_packedOwnershipOf} implementation for details.\n    //\n    // Bits Layout:\n    // - [0..159]   `addr`\n    // - [160..223] `startTimestamp`\n    // - [224]      `burned`\n    // - [225]      `nextInitialized`\n    // - [232..255] `extraData`\n    mapping(uint256 => uint256) private _packedOwnerships;\n\n    // Mapping owner address to address data.\n    //\n    // Bits Layout:\n    // - [0..63]    `balance`\n    // - [64..127]  `numberMinted`\n    // - [128..191] `numberBurned`\n    // - [192..255] `aux`\n    mapping(address => uint256) private _packedAddressData;\n\n    // Mapping from token ID to approved address.\n    mapping(uint256 => TokenApprovalRef) private _tokenApprovals;\n\n    // Mapping from owner to operator approvals\n    mapping(address => mapping(address => bool)) private _operatorApprovals;\n\n    // =============================================================\n    //                          CONSTRUCTOR\n    // =============================================================\n\n    constructor(string memory name_, string memory symbol_) {\n        _name = name_;\n        _symbol = symbol_;\n        _currentIndex = _startTokenId();\n    }\n\n    // =============================================================\n    //                   TOKEN COUNTING OPERATIONS\n    // =============================================================\n\n    /**\n     * @dev Returns the starting token ID.\n     * To change the starting token ID, please override this function.\n     */\n    function _startTokenId() internal view virtual returns (uint256) {\n        return 0;\n    }\n\n    /**\n     * @dev Returns the next token ID to be minted.\n     */\n    function _nextTokenId() internal view virtual returns (uint256) {\n        return _currentIndex;\n    }\n\n    /**\n     * @dev Returns the total number of tokens in existence.\n     * Burned tokens will reduce the count.\n     * To get the total number of tokens minted, please see {_totalMinted}.\n     */\n    function totalSupply() public view virtual 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     * @dev Returns the total amount of tokens minted in the contract.\n     */\n    function _totalMinted() internal view virtual 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 Returns the total number of tokens burned.\n     */\n    function _totalBurned() internal view virtual returns (uint256) {\n        return _burnCounter;\n    }\n\n    // =============================================================\n    //                    ADDRESS DATA OPERATIONS\n    // =============================================================\n\n    /**\n     * @dev Returns the number of tokens in `owner`'s account.\n     */\n    function balanceOf(address owner) public view virtual override returns (uint256) {\n        if (owner == address(0)) revert BalanceQueryForZeroAddress();\n        return _packedAddressData[owner] & _BITMASK_ADDRESS_DATA_ENTRY;\n    }\n\n    /**\n     * Returns the number of tokens minted by `owner`.\n     */\n    function _numberMinted(address owner) internal view returns (uint256) {\n        return (_packedAddressData[owner] >> _BITPOS_NUMBER_MINTED) & _BITMASK_ADDRESS_DATA_ENTRY;\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 (_packedAddressData[owner] >> _BITPOS_NUMBER_BURNED) & _BITMASK_ADDRESS_DATA_ENTRY;\n    }\n\n    /**\n     * Returns the auxiliary data for `owner`. (e.g. number of whitelist mint slots used).\n     */\n    function _getAux(address owner) internal view returns (uint64) {\n        return uint64(_packedAddressData[owner] >> _BITPOS_AUX);\n    }\n\n    /**\n     * Sets the auxiliary 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 virtual {\n        uint256 packed = _packedAddressData[owner];\n        uint256 auxCasted;\n        // Cast `aux` with assembly to avoid redundant masking.\n        assembly {\n            auxCasted := aux\n        }\n        packed = (packed & _BITMASK_AUX_COMPLEMENT) | (auxCasted << _BITPOS_AUX);\n        _packedAddressData[owner] = packed;\n    }\n\n    // =============================================================\n    //                            IERC165\n    // =============================================================\n\n    /**\n     * @dev Returns true if this contract implements the interface defined by\n     * `interfaceId`. See the corresponding\n     * [EIP section](https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified)\n     * to learn more about how these ids are created.\n     *\n     * This function call must use less than 30000 gas.\n     */\n    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {\n        // The interface IDs are constants representing the first 4 bytes\n        // of the XOR of all function selectors in the interface.\n        // See: [ERC165](https://eips.ethereum.org/EIPS/eip-165)\n        // (e.g. `bytes4(i.functionA.selector ^ i.functionB.selector ^ ...)`)\n        return\n            interfaceId == 0x01ffc9a7 || // ERC165 interface ID for ERC165.\n            interfaceId == 0x80ac58cd || // ERC165 interface ID for ERC721.\n            interfaceId == 0x5b5e139f; // ERC165 interface ID for ERC721Metadata.\n    }\n\n    // =============================================================\n    //                        IERC721Metadata\n    // =============================================================\n\n    /**\n     * @dev Returns the token collection name.\n     */\n    function name() public view virtual override returns (string memory) {\n        return _name;\n    }\n\n    /**\n     * @dev Returns the token collection symbol.\n     */\n    function symbol() public view virtual override returns (string memory) {\n        return _symbol;\n    }\n\n    /**\n     * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.\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, _toString(tokenId))) : '';\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, it can be overridden in child contracts.\n     */\n    function _baseURI() internal view virtual returns (string memory) {\n        return '';\n    }\n\n    // =============================================================\n    //                     OWNERSHIPS OPERATIONS\n    // =============================================================\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) public view virtual override returns (address) {\n        return address(uint160(_packedOwnershipOf(tokenId)));\n    }\n\n    /**\n     * @dev Gas spent here starts off proportional to the maximum mint batch size.\n     * It gradually moves to O(1) as tokens get transferred around over time.\n     */\n    function _ownershipOf(uint256 tokenId) internal view virtual returns (TokenOwnership memory) {\n        return _unpackedOwnership(_packedOwnershipOf(tokenId));\n    }\n\n    /**\n     * @dev Returns the unpacked `TokenOwnership` struct at `index`.\n     */\n    function _ownershipAt(uint256 index) internal view virtual returns (TokenOwnership memory) {\n        return _unpackedOwnership(_packedOwnerships[index]);\n    }\n\n    /**\n     * @dev Initializes the ownership slot minted at `index` for efficiency purposes.\n     */\n    function _initializeOwnershipAt(uint256 index) internal virtual {\n        if (_packedOwnerships[index] == 0) {\n            _packedOwnerships[index] = _packedOwnershipOf(index);\n        }\n    }\n\n    /**\n     * Returns the packed ownership data of `tokenId`.\n     */\n    function _packedOwnershipOf(uint256 tokenId) private view returns (uint256) {\n        uint256 curr = tokenId;\n\n        unchecked {\n            if (_startTokenId() <= curr)\n                if (curr < _currentIndex) {\n                    uint256 packed = _packedOwnerships[curr];\n                    // If not burned.\n                    if (packed & _BITMASK_BURNED == 0) {\n                        // Invariant:\n                        // There will always be an initialized ownership slot\n                        // (i.e. `ownership.addr != address(0) && ownership.burned == false`)\n                        // before an unintialized ownership slot\n                        // (i.e. `ownership.addr == address(0) && ownership.burned == false`)\n                        // Hence, `curr` will not underflow.\n                        //\n                        // We can directly compare the packed value.\n                        // If the address is zero, packed will be zero.\n                        while (packed == 0) {\n                            packed = _packedOwnerships[--curr];\n                        }\n                        return packed;\n                    }\n                }\n        }\n        revert OwnerQueryForNonexistentToken();\n    }\n\n    /**\n     * @dev Returns the unpacked `TokenOwnership` struct from `packed`.\n     */\n    function _unpackedOwnership(uint256 packed) private pure returns (TokenOwnership memory ownership) {\n        ownership.addr = address(uint160(packed));\n        ownership.startTimestamp = uint64(packed >> _BITPOS_START_TIMESTAMP);\n        ownership.burned = packed & _BITMASK_BURNED != 0;\n        ownership.extraData = uint24(packed >> _BITPOS_EXTRA_DATA);\n    }\n\n    /**\n     * @dev Packs ownership data into a single uint256.\n     */\n    function _packOwnershipData(address owner, uint256 flags) private view returns (uint256 result) {\n        assembly {\n            // Mask `owner` to the lower 160 bits, in case the upper bits somehow aren't clean.\n            owner := and(owner, _BITMASK_ADDRESS)\n            // `owner | (block.timestamp << _BITPOS_START_TIMESTAMP) | flags`.\n            result := or(owner, or(shl(_BITPOS_START_TIMESTAMP, timestamp()), flags))\n        }\n    }\n\n    /**\n     * @dev Returns the `nextInitialized` flag set if `quantity` equals 1.\n     */\n    function _nextInitializedFlag(uint256 quantity) private pure returns (uint256 result) {\n        // For branchless setting of the `nextInitialized` flag.\n        assembly {\n            // `(quantity == 1) << _BITPOS_NEXT_INITIALIZED`.\n            result := shl(_BITPOS_NEXT_INITIALIZED, eq(quantity, 1))\n        }\n    }\n\n    // =============================================================\n    //                      APPROVAL OPERATIONS\n    // =============================================================\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\n     * 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) public payable virtual override {\n        address owner = ownerOf(tokenId);\n\n        if (_msgSenderERC721A() != owner)\n            if (!isApprovedForAll(owner, _msgSenderERC721A())) {\n                revert ApprovalCallerNotOwnerNorApproved();\n            }\n\n        _tokenApprovals[tokenId].value = to;\n        emit Approval(owner, to, tokenId);\n    }\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) public view virtual override returns (address) {\n        if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken();\n\n        return _tokenApprovals[tokenId].value;\n    }\n\n    /**\n     * @dev Approve or remove `operator` as an operator for the caller.\n     * Operators can call {transferFrom} or {safeTransferFrom}\n     * 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) public virtual override {\n        _operatorApprovals[_msgSenderERC721A()][operator] = approved;\n        emit ApprovalForAll(_msgSenderERC721A(), operator, approved);\n    }\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) public view virtual override returns (bool) {\n        return _operatorApprovals[owner][operator];\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. See {_mint}.\n     */\n    function _exists(uint256 tokenId) internal view virtual returns (bool) {\n        return\n            _startTokenId() <= tokenId &&\n            tokenId < _currentIndex && // If within bounds,\n            _packedOwnerships[tokenId] & _BITMASK_BURNED == 0; // and not burned.\n    }\n\n    /**\n     * @dev Returns whether `msgSender` is equal to `approvedAddress` or `owner`.\n     */\n    function _isSenderApprovedOrOwner(\n        address approvedAddress,\n        address owner,\n        address msgSender\n    ) private pure returns (bool result) {\n        assembly {\n            // Mask `owner` to the lower 160 bits, in case the upper bits somehow aren't clean.\n            owner := and(owner, _BITMASK_ADDRESS)\n            // Mask `msgSender` to the lower 160 bits, in case the upper bits somehow aren't clean.\n            msgSender := and(msgSender, _BITMASK_ADDRESS)\n            // `msgSender == owner || msgSender == approvedAddress`.\n            result := or(eq(msgSender, owner), eq(msgSender, approvedAddress))\n        }\n    }\n\n    /**\n     * @dev Returns the storage slot and value for the approved address of `tokenId`.\n     */\n    function _getApprovedSlotAndAddress(uint256 tokenId)\n        private\n        view\n        returns (uint256 approvedAddressSlot, address approvedAddress)\n    {\n        TokenApprovalRef storage tokenApproval = _tokenApprovals[tokenId];\n        // The following is equivalent to `approvedAddress = _tokenApprovals[tokenId].value`.\n        assembly {\n            approvedAddressSlot := tokenApproval.slot\n            approvedAddress := sload(approvedAddressSlot)\n        }\n    }\n\n    // =============================================================\n    //                      TRANSFER OPERATIONS\n    // =============================================================\n\n    /**\n     * @dev Transfers `tokenId` 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 be owned by `from`.\n     * - If the caller is not `from`, it must be approved to move this token\n     * 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    ) public payable virtual override {\n        uint256 prevOwnershipPacked = _packedOwnershipOf(tokenId);\n\n        if (address(uint160(prevOwnershipPacked)) != from) revert TransferFromIncorrectOwner();\n\n        (uint256 approvedAddressSlot, address approvedAddress) = _getApprovedSlotAndAddress(tokenId);\n\n        // The nested ifs save around 20+ gas over a compound boolean condition.\n        if (!_isSenderApprovedOrOwner(approvedAddress, from, _msgSenderERC721A()))\n            if (!isApprovedForAll(from, _msgSenderERC721A())) revert TransferCallerNotOwnerNorApproved();\n\n        if (to == address(0)) revert TransferToZeroAddress();\n\n        _beforeTokenTransfers(from, to, tokenId, 1);\n\n        // Clear approvals from the previous owner.\n        assembly {\n            if approvedAddress {\n                // This is equivalent to `delete _tokenApprovals[tokenId]`.\n                sstore(approvedAddressSlot, 0)\n            }\n        }\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            // We can directly increment and decrement the balances.\n            --_packedAddressData[from]; // Updates: `balance -= 1`.\n            ++_packedAddressData[to]; // Updates: `balance += 1`.\n\n            // Updates:\n            // - `address` to the next owner.\n            // - `startTimestamp` to the timestamp of transfering.\n            // - `burned` to `false`.\n            // - `nextInitialized` to `true`.\n            _packedOwnerships[tokenId] = _packOwnershipData(\n                to,\n                _BITMASK_NEXT_INITIALIZED | _nextExtraData(from, to, prevOwnershipPacked)\n            );\n\n            // If the next slot may not have been initialized (i.e. `nextInitialized == false`) .\n            if (prevOwnershipPacked & _BITMASK_NEXT_INITIALIZED == 0) {\n                uint256 nextTokenId = tokenId + 1;\n                // If the next slot's address is zero and not burned (i.e. packed value is zero).\n                if (_packedOwnerships[nextTokenId] == 0) {\n                    // If the next slot is within bounds.\n                    if (nextTokenId != _currentIndex) {\n                        // Initialize the next slot to maintain correctness for `ownerOf(tokenId + 1)`.\n                        _packedOwnerships[nextTokenId] = prevOwnershipPacked;\n                    }\n                }\n            }\n        }\n\n        emit Transfer(from, to, tokenId);\n        _afterTokenTransfers(from, to, tokenId, 1);\n    }\n\n    /**\n     * @dev Equivalent to `safeTransferFrom(from, to, tokenId, '')`.\n     */\n    function safeTransferFrom(\n        address from,\n        address to,\n        uint256 tokenId\n    ) public payable virtual override {\n        safeTransferFrom(from, to, tokenId, '');\n    }\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\n     * by either {approve} or {setApprovalForAll}.\n     * - If `to` refers to a smart contract, it must implement\n     * {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 memory _data\n    ) public payable virtual override {\n        transferFrom(from, to, tokenId);\n        if (to.code.length != 0)\n            if (!_checkContractOnERC721Received(from, to, tokenId, _data)) {\n                revert TransferToNonERC721ReceiverImplementer();\n            }\n    }\n\n    /**\n     * @dev Hook that is called before a set of serially-ordered token IDs\n     * 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\n     * have been transferred. This includes 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 Private function to invoke {IERC721Receiver-onERC721Received} on a target contract.\n     *\n     * `from` - Previous owner of the given token ID.\n     * `to` - Target address that will receive the token.\n     * `tokenId` - Token ID to be transferred.\n     * `_data` - Optional data to send along with the call.\n     *\n     * Returns 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 ERC721A__IERC721Receiver(to).onERC721Received(_msgSenderERC721A(), from, tokenId, _data) returns (\n            bytes4 retval\n        ) {\n            return retval == ERC721A__IERC721Receiver(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    //                        MINT OPERATIONS\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 for each mint.\n     */\n    function _mint(address to, uint256 quantity) internal virtual {\n        uint256 startTokenId = _currentIndex;\n        if (quantity == 0) revert MintZeroQuantity();\n\n        _beforeTokenTransfers(address(0), to, startTokenId, quantity);\n\n        // Overflows are incredibly unrealistic.\n        // `balance` and `numberMinted` have a maximum limit of 2**64.\n        // `tokenId` has a maximum limit of 2**256.\n        unchecked {\n            // Updates:\n            // - `balance += quantity`.\n            // - `numberMinted += quantity`.\n            //\n            // We can directly add to the `balance` and `numberMinted`.\n            _packedAddressData[to] += quantity * ((1 << _BITPOS_NUMBER_MINTED) | 1);\n\n            // Updates:\n            // - `address` to the owner.\n            // - `startTimestamp` to the timestamp of minting.\n            // - `burned` to `false`.\n            // - `nextInitialized` to `quantity == 1`.\n            _packedOwnerships[startTokenId] = _packOwnershipData(\n                to,\n                _nextInitializedFlag(quantity) | _nextExtraData(address(0), to, 0)\n            );\n\n            uint256 toMasked;\n            uint256 end = startTokenId + quantity;\n\n            // Use assembly to loop and emit the `Transfer` event for gas savings.\n            // The duplicated `log4` removes an extra check and reduces stack juggling.\n            // The assembly, together with the surrounding Solidity code, have been\n            // delicately arranged to nudge the compiler into producing optimized opcodes.\n            assembly {\n                // Mask `to` to the lower 160 bits, in case the upper bits somehow aren't clean.\n                toMasked := and(to, _BITMASK_ADDRESS)\n                // Emit the `Transfer` event.\n                log4(\n                    0, // Start of data (0, since no data).\n                    0, // End of data (0, since no data).\n                    _TRANSFER_EVENT_SIGNATURE, // Signature.\n                    0, // `address(0)`.\n                    toMasked, // `to`.\n                    startTokenId // `tokenId`.\n                )\n\n                // The `iszero(eq(,))` check ensures that large values of `quantity`\n                // that overflows uint256 will make the loop run out of gas.\n                // The compiler will optimize the `iszero` away for performance.\n                for {\n                    let tokenId := add(startTokenId, 1)\n                } iszero(eq(tokenId, end)) {\n                    tokenId := add(tokenId, 1)\n                } {\n                    // Emit the `Transfer` event. Similar to above.\n                    log4(0, 0, _TRANSFER_EVENT_SIGNATURE, 0, toMasked, tokenId)\n                }\n            }\n            if (toMasked == 0) revert MintToZeroAddress();\n\n            _currentIndex = end;\n        }\n        _afterTokenTransfers(address(0), to, startTokenId, quantity);\n    }\n\n    /**\n     * @dev Mints `quantity` tokens and transfers them to `to`.\n     *\n     * This function is intended for efficient minting only during contract creation.\n     *\n     * It emits only one {ConsecutiveTransfer} as defined in\n     * [ERC2309](https://eips.ethereum.org/EIPS/eip-2309),\n     * instead of a sequence of {Transfer} event(s).\n     *\n     * Calling this function outside of contract creation WILL make your contract\n     * non-compliant with the ERC721 standard.\n     * For full ERC721 compliance, substituting ERC721 {Transfer} event(s) with the ERC2309\n     * {ConsecutiveTransfer} event is only permissible during contract creation.\n     *\n     * Requirements:\n     *\n     * - `to` cannot be the zero address.\n     * - `quantity` must be greater than 0.\n     *\n     * Emits a {ConsecutiveTransfer} event.\n     */\n    function _mintERC2309(address to, uint256 quantity) internal virtual {\n        uint256 startTokenId = _currentIndex;\n        if (to == address(0)) revert MintToZeroAddress();\n        if (quantity == 0) revert MintZeroQuantity();\n        if (quantity > _MAX_MINT_ERC2309_QUANTITY_LIMIT) revert MintERC2309QuantityExceedsLimit();\n\n        _beforeTokenTransfers(address(0), to, startTokenId, quantity);\n\n        // Overflows are unrealistic due to the above check for `quantity` to be below the limit.\n        unchecked {\n            // Updates:\n            // - `balance += quantity`.\n            // - `numberMinted += quantity`.\n            //\n            // We can directly add to the `balance` and `numberMinted`.\n            _packedAddressData[to] += quantity * ((1 << _BITPOS_NUMBER_MINTED) | 1);\n\n            // Updates:\n            // - `address` to the owner.\n            // - `startTimestamp` to the timestamp of minting.\n            // - `burned` to `false`.\n            // - `nextInitialized` to `quantity == 1`.\n            _packedOwnerships[startTokenId] = _packOwnershipData(\n                to,\n                _nextInitializedFlag(quantity) | _nextExtraData(address(0), to, 0)\n            );\n\n            emit ConsecutiveTransfer(startTokenId, startTokenId + quantity - 1, address(0), to);\n\n            _currentIndex = startTokenId + quantity;\n        }\n        _afterTokenTransfers(address(0), to, startTokenId, 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     * See {_mint}.\n     *\n     * Emits a {Transfer} event for each mint.\n     */\n    function _safeMint(\n        address to,\n        uint256 quantity,\n        bytes memory _data\n    ) internal virtual {\n        _mint(to, quantity);\n\n        unchecked {\n            if (to.code.length != 0) {\n                uint256 end = _currentIndex;\n                uint256 index = end - quantity;\n                do {\n                    if (!_checkContractOnERC721Received(address(0), to, index++, _data)) {\n                        revert TransferToNonERC721ReceiverImplementer();\n                    }\n                } while (index < end);\n                // Reentrancy protection.\n                if (_currentIndex != end) revert();\n            }\n        }\n    }\n\n    /**\n     * @dev Equivalent to `_safeMint(to, quantity, '')`.\n     */\n    function _safeMint(address to, uint256 quantity) internal virtual {\n        _safeMint(to, quantity, '');\n    }\n\n    // =============================================================\n    //                        BURN OPERATIONS\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        uint256 prevOwnershipPacked = _packedOwnershipOf(tokenId);\n\n        address from = address(uint160(prevOwnershipPacked));\n\n        (uint256 approvedAddressSlot, address approvedAddress) = _getApprovedSlotAndAddress(tokenId);\n\n        if (approvalCheck) {\n            // The nested ifs save around 20+ gas over a compound boolean condition.\n            if (!_isSenderApprovedOrOwner(approvedAddress, from, _msgSenderERC721A()))\n                if (!isApprovedForAll(from, _msgSenderERC721A())) revert TransferCallerNotOwnerNorApproved();\n        }\n\n        _beforeTokenTransfers(from, address(0), tokenId, 1);\n\n        // Clear approvals from the previous owner.\n        assembly {\n            if approvedAddress {\n                // This is equivalent to `delete _tokenApprovals[tokenId]`.\n                sstore(approvedAddressSlot, 0)\n            }\n        }\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            // Updates:\n            // - `balance -= 1`.\n            // - `numberBurned += 1`.\n            //\n            // We can directly decrement the balance, and increment the number burned.\n            // This is equivalent to `packed -= 1; packed += 1 << _BITPOS_NUMBER_BURNED;`.\n            _packedAddressData[from] += (1 << _BITPOS_NUMBER_BURNED) - 1;\n\n            // Updates:\n            // - `address` to the last owner.\n            // - `startTimestamp` to the timestamp of burning.\n            // - `burned` to `true`.\n            // - `nextInitialized` to `true`.\n            _packedOwnerships[tokenId] = _packOwnershipData(\n                from,\n                (_BITMASK_BURNED | _BITMASK_NEXT_INITIALIZED) | _nextExtraData(from, address(0), prevOwnershipPacked)\n            );\n\n            // If the next slot may not have been initialized (i.e. `nextInitialized == false`) .\n            if (prevOwnershipPacked & _BITMASK_NEXT_INITIALIZED == 0) {\n                uint256 nextTokenId = tokenId + 1;\n                // If the next slot's address is zero and not burned (i.e. packed value is zero).\n                if (_packedOwnerships[nextTokenId] == 0) {\n                    // If the next slot is within bounds.\n                    if (nextTokenId != _currentIndex) {\n                        // Initialize the next slot to maintain correctness for `ownerOf(tokenId + 1)`.\n                        _packedOwnerships[nextTokenId] = prevOwnershipPacked;\n                    }\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    //                     EXTRA DATA OPERATIONS\n    // =============================================================\n\n    /**\n     * @dev Directly sets the extra data for the ownership data `index`.\n     */\n    function _setExtraDataAt(uint256 index, uint24 extraData) internal virtual {\n        uint256 packed = _packedOwnerships[index];\n        if (packed == 0) revert OwnershipNotInitializedForExtraData();\n        uint256 extraDataCasted;\n        // Cast `extraData` with assembly to avoid redundant masking.\n        assembly {\n            extraDataCasted := extraData\n        }\n        packed = (packed & _BITMASK_EXTRA_DATA_COMPLEMENT) | (extraDataCasted << _BITPOS_EXTRA_DATA);\n        _packedOwnerships[index] = packed;\n    }\n\n    /**\n     * @dev Called during each token transfer to set the 24bit `extraData` field.\n     * Intended to be overridden by the cosumer contract.\n     *\n     * `previousExtraData` - the value of `extraData` before transfer.\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 _extraData(\n        address from,\n        address to,\n        uint24 previousExtraData\n    ) internal view virtual returns (uint24) {}\n\n    /**\n     * @dev Returns the next extra data for the packed ownership data.\n     * The returned result is shifted into position.\n     */\n    function _nextExtraData(\n        address from,\n        address to,\n        uint256 prevOwnershipPacked\n    ) private view returns (uint256) {\n        uint24 extraData = uint24(prevOwnershipPacked >> _BITPOS_EXTRA_DATA);\n        return uint256(_extraData(from, to, extraData)) << _BITPOS_EXTRA_DATA;\n    }\n\n    // =============================================================\n    //                       OTHER OPERATIONS\n    // =============================================================\n\n    /**\n     * @dev Returns the message sender (defaults to `msg.sender`).\n     *\n     * If you are writing GSN compatible contracts, you need to override this function.\n     */\n    function _msgSenderERC721A() internal view virtual returns (address) {\n        return msg.sender;\n    }\n\n    /**\n     * @dev Converts a uint256 to its ASCII string decimal representation.\n     */\n    function _toString(uint256 value) internal pure virtual returns (string memory str) {\n        assembly {\n            // The maximum value of a uint256 contains 78 digits (1 byte per digit), but\n            // we allocate 0xa0 bytes to keep the free memory pointer 32-byte word aligned.\n            // We will need 1 word for the trailing zeros padding, 1 word for the length,\n            // and 3 words for a maximum of 78 digits. Total: 5 * 0x20 = 0xa0.\n            let m := add(mload(0x40), 0xa0)\n            // Update the free memory pointer to allocate.\n            mstore(0x40, m)\n            // Assign the `str` to the end.\n            str := sub(m, 0x20)\n            // Zeroize the slot after the string.\n            mstore(str, 0)\n\n            // Cache the end of the memory to calculate the length later.\n            let end := str\n\n            // We write the string from rightmost digit to leftmost digit.\n            // The following is essentially a do-while loop that also handles the zero case.\n            // prettier-ignore\n            for { let temp := value } 1 {} {\n                str := sub(str, 1)\n                // Write the character to the pointer.\n                // The ASCII index of the '0' character is 48.\n                mstore8(str, add(48, mod(temp, 10)))\n                // Keep dividing `temp` until zero.\n                temp := div(temp, 10)\n                // prettier-ignore\n                if iszero(temp) { break }\n            }\n\n            let length := sub(end, str)\n            // Move the pointer 32 bytes leftwards to make room for the length.\n            str := sub(str, 0x20)\n            // Store the length.\n            mstore(str, length)\n        }\n    }\n}\n"
      },
      "@openzeppelin/contracts/utils/Strings.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.0) (utils/Strings.sol)\n\npragma solidity ^0.8.0;\n\nimport \"./math/Math.sol\";\nimport \"./math/SignedMath.sol\";\n\n/**\n * @dev String operations.\n */\nlibrary Strings {\n    bytes16 private constant _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        unchecked {\n            uint256 length = Math.log10(value) + 1;\n            string memory buffer = new string(length);\n            uint256 ptr;\n            /// @solidity memory-safe-assembly\n            assembly {\n                ptr := add(buffer, add(32, length))\n            }\n            while (true) {\n                ptr--;\n                /// @solidity memory-safe-assembly\n                assembly {\n                    mstore8(ptr, byte(mod(value, 10), _SYMBOLS))\n                }\n                value /= 10;\n                if (value == 0) break;\n            }\n            return buffer;\n        }\n    }\n\n    /**\n     * @dev Converts a `int256` to its ASCII `string` decimal representation.\n     */\n    function toString(int256 value) internal pure returns (string memory) {\n        return string(abi.encodePacked(value < 0 ? \"-\" : \"\", toString(SignedMath.abs(value))));\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        unchecked {\n            return toHexString(value, Math.log256(value) + 1);\n        }\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] = _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    /**\n     * @dev Returns true if the two strings are equal.\n     */\n    function equal(string memory a, string memory b) internal pure returns (bool) {\n        return keccak256(bytes(a)) == keccak256(bytes(b));\n    }\n}\n"
      },
      "@openzeppelin/contracts/utils/math/Math.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.0) (utils/math/Math.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Standard math utilities missing in the Solidity language.\n */\nlibrary Math {\n    enum Rounding {\n        Down, // Toward negative infinity\n        Up, // Toward infinity\n        Zero // Toward zero\n    }\n\n    /**\n     * @dev Returns the largest of two numbers.\n     */\n    function max(uint256 a, uint256 b) internal pure returns (uint256) {\n        return a > b ? a : b;\n    }\n\n    /**\n     * @dev Returns the smallest of two numbers.\n     */\n    function min(uint256 a, uint256 b) internal pure returns (uint256) {\n        return a < b ? a : b;\n    }\n\n    /**\n     * @dev Returns the average of two numbers. The result is rounded towards\n     * zero.\n     */\n    function average(uint256 a, uint256 b) internal pure returns (uint256) {\n        // (a + b) / 2 can overflow.\n        return (a & b) + (a ^ b) / 2;\n    }\n\n    /**\n     * @dev Returns the ceiling of the division of two numbers.\n     *\n     * This differs from standard division with `/` in that it rounds up instead\n     * of rounding down.\n     */\n    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {\n        // (a + b - 1) / b can overflow on addition, so we distribute.\n        return a == 0 ? 0 : (a - 1) / b + 1;\n    }\n\n    /**\n     * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0\n     * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)\n     * with further edits by Uniswap Labs also under MIT license.\n     */\n    function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {\n        unchecked {\n            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use\n            // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256\n            // variables such that product = prod1 * 2^256 + prod0.\n            uint256 prod0; // Least significant 256 bits of the product\n            uint256 prod1; // Most significant 256 bits of the product\n            assembly {\n                let mm := mulmod(x, y, not(0))\n                prod0 := mul(x, y)\n                prod1 := sub(sub(mm, prod0), lt(mm, prod0))\n            }\n\n            // Handle non-overflow cases, 256 by 256 division.\n            if (prod1 == 0) {\n                // Solidity will revert if denominator == 0, unlike the div opcode on its own.\n                // The surrounding unchecked block does not change this fact.\n                // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.\n                return prod0 / denominator;\n            }\n\n            // Make sure the result is less than 2^256. Also prevents denominator == 0.\n            require(denominator > prod1, \"Math: mulDiv overflow\");\n\n            ///////////////////////////////////////////////\n            // 512 by 256 division.\n            ///////////////////////////////////////////////\n\n            // Make division exact by subtracting the remainder from [prod1 prod0].\n            uint256 remainder;\n            assembly {\n                // Compute remainder using mulmod.\n                remainder := mulmod(x, y, denominator)\n\n                // Subtract 256 bit number from 512 bit number.\n                prod1 := sub(prod1, gt(remainder, prod0))\n                prod0 := sub(prod0, remainder)\n            }\n\n            // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.\n            // See https://cs.stackexchange.com/q/138556/92363.\n\n            // Does not overflow because the denominator cannot be zero at this stage in the function.\n            uint256 twos = denominator & (~denominator + 1);\n            assembly {\n                // Divide denominator by twos.\n                denominator := div(denominator, twos)\n\n                // Divide [prod1 prod0] by twos.\n                prod0 := div(prod0, twos)\n\n                // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.\n                twos := add(div(sub(0, twos), twos), 1)\n            }\n\n            // Shift in bits from prod1 into prod0.\n            prod0 |= prod1 * twos;\n\n            // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such\n            // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for\n            // four bits. That is, denominator * inv = 1 mod 2^4.\n            uint256 inverse = (3 * denominator) ^ 2;\n\n            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works\n            // in modular arithmetic, doubling the correct bits in each step.\n            inverse *= 2 - denominator * inverse; // inverse mod 2^8\n            inverse *= 2 - denominator * inverse; // inverse mod 2^16\n            inverse *= 2 - denominator * inverse; // inverse mod 2^32\n            inverse *= 2 - denominator * inverse; // inverse mod 2^64\n            inverse *= 2 - denominator * inverse; // inverse mod 2^128\n            inverse *= 2 - denominator * inverse; // inverse mod 2^256\n\n            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.\n            // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is\n            // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1\n            // is no longer required.\n            result = prod0 * inverse;\n            return result;\n        }\n    }\n\n    /**\n     * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.\n     */\n    function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {\n        uint256 result = mulDiv(x, y, denominator);\n        if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {\n            result += 1;\n        }\n        return result;\n    }\n\n    /**\n     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.\n     *\n     * Inspired by Henry S. Warren, Jr.'s \"Hacker's Delight\" (Chapter 11).\n     */\n    function sqrt(uint256 a) internal pure returns (uint256) {\n        if (a == 0) {\n            return 0;\n        }\n\n        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.\n        //\n        // We know that the \"msb\" (most significant bit) of our target number `a` is a power of 2 such that we have\n        // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.\n        //\n        // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`\n        // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`\n        // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`\n        //\n        // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.\n        uint256 result = 1 << (log2(a) >> 1);\n\n        // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,\n        // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at\n        // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision\n        // into the expected uint128 result.\n        unchecked {\n            result = (result + a / result) >> 1;\n            result = (result + a / result) >> 1;\n            result = (result + a / result) >> 1;\n            result = (result + a / result) >> 1;\n            result = (result + a / result) >> 1;\n            result = (result + a / result) >> 1;\n            result = (result + a / result) >> 1;\n            return min(result, a / result);\n        }\n    }\n\n    /**\n     * @notice Calculates sqrt(a), following the selected rounding direction.\n     */\n    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {\n        unchecked {\n            uint256 result = sqrt(a);\n            return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);\n        }\n    }\n\n    /**\n     * @dev Return the log in base 2, rounded down, of a positive value.\n     * Returns 0 if given 0.\n     */\n    function log2(uint256 value) internal pure returns (uint256) {\n        uint256 result = 0;\n        unchecked {\n            if (value >> 128 > 0) {\n                value >>= 128;\n                result += 128;\n            }\n            if (value >> 64 > 0) {\n                value >>= 64;\n                result += 64;\n            }\n            if (value >> 32 > 0) {\n                value >>= 32;\n                result += 32;\n            }\n            if (value >> 16 > 0) {\n                value >>= 16;\n                result += 16;\n            }\n            if (value >> 8 > 0) {\n                value >>= 8;\n                result += 8;\n            }\n            if (value >> 4 > 0) {\n                value >>= 4;\n                result += 4;\n            }\n            if (value >> 2 > 0) {\n                value >>= 2;\n                result += 2;\n            }\n            if (value >> 1 > 0) {\n                result += 1;\n            }\n        }\n        return result;\n    }\n\n    /**\n     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.\n     * Returns 0 if given 0.\n     */\n    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {\n        unchecked {\n            uint256 result = log2(value);\n            return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);\n        }\n    }\n\n    /**\n     * @dev Return the log in base 10, rounded down, of a positive value.\n     * Returns 0 if given 0.\n     */\n    function log10(uint256 value) internal pure returns (uint256) {\n        uint256 result = 0;\n        unchecked {\n            if (value >= 10 ** 64) {\n                value /= 10 ** 64;\n                result += 64;\n            }\n            if (value >= 10 ** 32) {\n                value /= 10 ** 32;\n                result += 32;\n            }\n            if (value >= 10 ** 16) {\n                value /= 10 ** 16;\n                result += 16;\n            }\n            if (value >= 10 ** 8) {\n                value /= 10 ** 8;\n                result += 8;\n            }\n            if (value >= 10 ** 4) {\n                value /= 10 ** 4;\n                result += 4;\n            }\n            if (value >= 10 ** 2) {\n                value /= 10 ** 2;\n                result += 2;\n            }\n            if (value >= 10 ** 1) {\n                result += 1;\n            }\n        }\n        return result;\n    }\n\n    /**\n     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.\n     * Returns 0 if given 0.\n     */\n    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {\n        unchecked {\n            uint256 result = log10(value);\n            return result + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0);\n        }\n    }\n\n    /**\n     * @dev Return the log in base 256, rounded down, of a positive value.\n     * Returns 0 if given 0.\n     *\n     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.\n     */\n    function log256(uint256 value) internal pure returns (uint256) {\n        uint256 result = 0;\n        unchecked {\n            if (value >> 128 > 0) {\n                value >>= 128;\n                result += 16;\n            }\n            if (value >> 64 > 0) {\n                value >>= 64;\n                result += 8;\n            }\n            if (value >> 32 > 0) {\n                value >>= 32;\n                result += 4;\n            }\n            if (value >> 16 > 0) {\n                value >>= 16;\n                result += 2;\n            }\n            if (value >> 8 > 0) {\n                result += 1;\n            }\n        }\n        return result;\n    }\n\n    /**\n     * @dev Return the log in base 256, following the selected rounding direction, of a positive value.\n     * Returns 0 if given 0.\n     */\n    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {\n        unchecked {\n            uint256 result = log256(value);\n            return result + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0);\n        }\n    }\n}\n"
      },
      "@openzeppelin/contracts/utils/math/SignedMath.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SignedMath.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Standard signed math utilities missing in the Solidity language.\n */\nlibrary SignedMath {\n    /**\n     * @dev Returns the largest of two signed numbers.\n     */\n    function max(int256 a, int256 b) internal pure returns (int256) {\n        return a > b ? a : b;\n    }\n\n    /**\n     * @dev Returns the smallest of two signed numbers.\n     */\n    function min(int256 a, int256 b) internal pure returns (int256) {\n        return a < b ? a : b;\n    }\n\n    /**\n     * @dev Returns the average of two signed numbers without overflow.\n     * The result is rounded towards zero.\n     */\n    function average(int256 a, int256 b) internal pure returns (int256) {\n        // Formula from the book \"Hacker's Delight\"\n        int256 x = (a & b) + ((a ^ b) >> 1);\n        return x + (int256(uint256(x) >> 255) & (a ^ b));\n    }\n\n    /**\n     * @dev Returns the absolute unsigned value of a signed value.\n     */\n    function abs(int256 n) internal pure returns (uint256) {\n        unchecked {\n            // must be unchecked in order to support `n = type(int256).min`\n            return uint256(n >= 0 ? n : -n);\n        }\n    }\n}\n"
      },
      "@openzeppelin/contracts/interfaces/IERC1271.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (interfaces/IERC1271.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC1271 standard signature validation method for\n * contracts as defined in https://eips.ethereum.org/EIPS/eip-1271[ERC-1271].\n *\n * _Available since v4.1._\n */\ninterface IERC1271 {\n    /**\n     * @dev Should return whether the signature provided is valid for the provided data\n     * @param hash      Hash of the data to be signed\n     * @param signature Signature byte array associated with _data\n     */\n    function isValidSignature(bytes32 hash, bytes memory signature) external view returns (bytes4 magicValue);\n}\n"
      },
      "@openzeppelin/contracts/utils/Address.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.0) (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     * Furthermore, `isContract` will also return true if the target contract within\n     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,\n     * which only has an effect at the end of a transaction.\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://consensys.net/diligence/blog/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/v0.8.0/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 functionCallWithValue(target, data, 0, \"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(address target, bytes memory data, uint256 value) 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        (bool success, bytes memory returndata) = target.call{value: value}(data);\n        return verifyCallResultFromTarget(target, 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        (bool success, bytes memory returndata) = target.staticcall(data);\n        return verifyCallResultFromTarget(target, 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        (bool success, bytes memory returndata) = target.delegatecall(data);\n        return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling\n     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.\n     *\n     * _Available since v4.8._\n     */\n    function verifyCallResultFromTarget(\n        address target,\n        bool success,\n        bytes memory returndata,\n        string memory errorMessage\n    ) internal view returns (bytes memory) {\n        if (success) {\n            if (returndata.length == 0) {\n                // only check isContract if the call was successful and the return data is empty\n                // otherwise we already know that it was a contract\n                require(isContract(target), \"Address: call to non-contract\");\n            }\n            return returndata;\n        } else {\n            _revert(returndata, errorMessage);\n        }\n    }\n\n    /**\n     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the\n     * revert reason or 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            _revert(returndata, errorMessage);\n        }\n    }\n\n    function _revert(bytes memory returndata, string memory errorMessage) private pure {\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"
      },
      "@openzeppelin/contracts/token/ERC20/IERC20.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.0) (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 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    /**\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 `to`.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * Emits a {Transfer} event.\n     */\n    function transfer(address to, 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 `from` to `to` 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(address from, address to, uint256 amount) external returns (bool);\n}\n"
      },
      "@openzeppelin/contracts/token/ERC20/extensions/IERC20Permit.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.4) (token/ERC20/extensions/IERC20Permit.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in\n * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].\n *\n * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by\n * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't\n * need to send a transaction, and thus is not required to hold Ether at all.\n *\n * ==== Security Considerations\n *\n * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature\n * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be\n * considered as an intention to spend the allowance in any specific way. The second is that because permits have\n * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should\n * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be\n * generally recommended is:\n *\n * ```solidity\n * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {\n *     try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}\n *     doThing(..., value);\n * }\n *\n * function doThing(..., uint256 value) public {\n *     token.safeTransferFrom(msg.sender, address(this), value);\n *     ...\n * }\n * ```\n *\n * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of\n * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also\n * {SafeERC20-safeTransferFrom}).\n *\n * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so\n * contracts should have entry points that don't rely on permit.\n */\ninterface IERC20Permit {\n    /**\n     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,\n     * given ``owner``'s signed approval.\n     *\n     * IMPORTANT: The same issues {IERC20-approve} has related to transaction\n     * ordering also apply here.\n     *\n     * Emits an {Approval} event.\n     *\n     * Requirements:\n     *\n     * - `spender` cannot be the zero address.\n     * - `deadline` must be a timestamp in the future.\n     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`\n     * over the EIP712-formatted function arguments.\n     * - the signature must use ``owner``'s current nonce (see {nonces}).\n     *\n     * For more information on the signature format, see the\n     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP\n     * section].\n     *\n     * CAUTION: See Security Considerations above.\n     */\n    function permit(\n        address owner,\n        address spender,\n        uint256 value,\n        uint256 deadline,\n        uint8 v,\n        bytes32 r,\n        bytes32 s\n    ) external;\n\n    /**\n     * @dev Returns the current nonce for `owner`. This value must be\n     * included whenever a signature is generated for {permit}.\n     *\n     * Every successful call to {permit} increases ``owner``'s nonce by one. This\n     * prevents a signature from being used multiple times.\n     */\n    function nonces(address owner) external view returns (uint256);\n\n    /**\n     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.\n     */\n    // solhint-disable-next-line func-name-mixedcase\n    function DOMAIN_SEPARATOR() external view returns (bytes32);\n}\n"
      }
    },
    "settings": {
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        "runs": 200
      },
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