{
  "language": "Solidity",
  "sources": {
    "contracts/SwagSkulls.sol": {
      "content": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.13;\n\nimport \"erc721a/contracts/extensions/ERC721AQueryable.sol\";\nimport \"@openzeppelin/contracts/access/Ownable.sol\";\nimport \"@openzeppelin/contracts/utils/cryptography/ECDSA.sol\";\n\n/*\nkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk\nkkkkkkkkkkkkkkkkkkkxxkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxxxxkkkkkkkkkkkkkkkkkkkkkk\nkkkxxkkkkkkkkkkkxxxkkkxkkkkkkkkkkOOOOOOOkOOOkkkkkkkkxxkxxxkkxkkkkkkkkkkkkkkkxxkk\nkkxkkxxkkkkkkkkxkkkkxxxkkkkOkkdlc:;,,,,,,,;:cloxkOkkkxxxxxkkkkkkkkkkkkkxxxkkkxkk\nkkkkkkxxkkkkkkkkkkkkkkkkkxo:,..  ..'',,'''.    .';ldkkkkkkkkkkkkkkkkkkkkkxkxxkkk\nkkkkkkkkkkkkkkkkkkkkkkxl;.  .;lddkXNWWWWNNx..co:'. .'cdkOkkkkxkkkkxxkkkkkkkkkkkk\nkkkkkkkkkxkkkkkkkkkkxc.  'lxxxKNxkWMMMMMMK; 'oONN0d;. .;dkkkkkxxxxxxxkOkkkkkkkkk\nkkkkkkxxxxxkkkkkkkkl.  ;xOd:,c0MMMMMMMMMMXkd,'kWMMMW0l. .;dkkkkxxxkxxkOkkkkkkkkk\nkkkkkkxxkxxkkkxkkd,  ,k0l,;xXWMMMMMMMMMMMMWOdKMMMMMMMWKl. .ckOkkkkkkkkkkkkkkkkkk\nkkkkkkkxkxxxkkkko. .oXk';kNMMMMMMMMMMMMMMMN0NMMMMMMMMMMWO,  :xkkkkkkxxkkkkkkkkkk\nkkkkkkkkkkkkkkko. .xWWKONMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMK:  :kOkkxkxxkkkkkkkkkk\nkkkkkkkkkkkkkOd. .xWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMK;  ckkxxxkkxxkkkkkkkk\nkkkxkkxxkkkkOk;  cNMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMO. .dOkxxxkxxkkkkkkkk\nkkxkkxxxkkxkOd. .OMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMNc  :kkkkkkkkkkkkkkkk\nkkkkxxkkxxxkOl. ;XMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMx. ,kOkkkkkkkkkkxkkk\nkkkkkkkkxkkkkc  cNMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWNXXKK00XWk. 'xOkkkkkkkkkxxxkk\nkkkkkkkkkkkkOl. :NMMMMMMMMMMMMMMMMMMMMMMMMMMWX0kxooolcc:::xNx. 'xOkkkkkkxxxkkxkk\nkkkkkkkkkkkkOo. '0MMMMMMMMMMMMWWNNNNNNNXXKOxoc'...,::::::l0No  ;kkkkkkkkkkkkkkkk\nkkkkkkxkkkkkkk;  oWMMMWNXKOxxdodoooocoolcc:::,....;::::::lK0' .oOkkkkkkkkkkkkkkk\nkkkkkkxxkkkxkOo. .kWXkdlc;....,:::::::lO0Odc:' ..':::::::l0o  ;kOkkxxkkkkkkkkkkk\nkkkxkkkkxkkxkkkc. 'OXxc::' ..':::::::cOWWMNkl' ..':::::::dXd  'dOkkkkxkxxkxkkkkk\nkkkkxkkkxkkkkkkkc. .xN0o:. ..':::::::oKX0kx0Kd;'.':::cldONMNl  ,xkxxkkkkkxkkkkkk\nkkkkkkkkkkkkkkkkko. .c0Oc. ..,::::::l0Nl   .xNX0OkOO0KXWMMMMK, .oOkkkxxkkkkkkkkk\nkkkkkkkkkkkkkkkkkkx;. 'kO:...,:::coxKW0'    .oNMMMMMMMMMMMMM0' .oOkkkkkkkkkkkkkk\nkkkkkkkkkkxxkkkkxkOk:  lWXOxxxkO0KNWMMO.     ;KMMMMMMMMMMMW0;  :kkkkkkkkkkkkkkkk\nkkkkkkkkkkxxxkxxxkkk:  oWMMMMMMMMMMMMMWOoc;:o0WMMMMMMMN0xo:. .cxkkkkkkxxxkxxxkkk\nkkkkkkkkkkxxxxxkkkkOl. ,KMMMMMMMMMMMMMMMMMMMMMMMMMMMMK;     ,dkkkkkkkkxxxxxkkkkk\nkkkkkkkkkkkkkxkkkkkkk:  ,xXMMMMMMMMMMMMMMMMMMMMMMMMMMx. ;c  cOkkkkkOkkkxxxkkkkkk\nkkkkkxxkkkkkkkkkkkkkOkl.  .;cc:;:xNMMMMMMMMMMMMMWX0xc. .kO. ;kOkkkkkkkkkkkkkkkkk\nkkxkkxxkkkxkOkkkkkkkkkkxo:,.  ..  c0XDGAPX0Oxdl:,.. .,lKWK, 'xOkkkkkxxxkkkkkkkkk\nkkkxkxxkkkkkkkkxkkkxxkkkkkOx, .do. ........  ..';cokKWMMMWc .oOkkkkkxxkxxkkkkkkk\nkkkkkkkkkkkOkkkxxkkkkxkkkkkOo. :X0ooloooddxkO0XNWMMMMMMMMWl  cOkkkkxxkkxkkkkkkkk\nkkkkkkkkkkOkkkkkkkxxkkkkkkkkk: .dOdNVTQSWDHMMMMMMMMMMMMNk;. 'okkkkkkkkkkkOkkkkkk\nkkkkkkkkkkkkkkkkkkxxkkkkkkkkOx' '0WOccoxkOKWMMMMMMMMWKd, .,okkkkkkkkkkkkkkkkkkkk\nkkkkkkkkxxkkkkkkkkkkkkkkkkkkkOl. 'clcccc::dXMMMMMN0d:. .:dkkkkkkkkkkkkkxkkkxxkkk\nkkOkxxkkkxxxkkkkkkkkkkkkkxxxkkkl;'.....,;:cooool:'. .,lxkkkkkxxkkkkkkkxxxkkkkkkk\nkkkkxxxxxxkkxkkkkkkkkkkkxxxxxkkkOkkdoc:;,,'.....';coxkkkkkxxkxxxkkxkkkkxkkkkkkkk\nkkkkkkxxxkkkkkkkkkkOkkkxxkkxxkkkkkkkkkOOOkkkkxkkkOOkkkkkkkxxxkxxxkkkkkkkkkkkkkkk\nkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkOkkkkkkkkkkkkkkkkklancexwasxherextookkkk\nkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk\n*/\n\n/**\n * @title Swag Skulls\n * @author Swag Golf\n */\ncontract SwagSkulls is ERC721AQueryable, Ownable {\n\n    using ECDSA for bytes32;\n\n    uint public _maximumSupply = 8888;\n    bool private _maximumSupplyLocked = false;\n    uint256 private _mintingPrice;\n    uint256 private _maxMintingBatchQuantity = 10;\n    address private _mintingSigner;\n    bool private _publicMintAllowed = false;\n    mapping ( address => uint256 ) private privateMintAddressToQuantity;\n\n    bool private _isRevealed = false;\n    string public _revealUri;\n    string public _prerevealUri;\n\n    address public _withdrawalAddress;\n\n    function _startTokenId() internal pure override returns (uint256) {\n        return 1;\n    }\n\n    function startTokenId() external pure returns (uint256) {\n        return _startTokenId();\n    }\n\n    function setMaximumSupply( \n        uint maximumSupply\n    )\n        external \n        onlyOwner \n    {\n        require( !_maximumSupplyLocked, \"Max supply is locked and cannot be changed\" );\n        _maximumSupply = maximumSupply;\n    }\n\n    function lockMaximumSupply(\n        bool isLocked\n    )\n        external\n        onlyOwner \n    {\n        require( isLocked != _maximumSupplyLocked, \"New value idential to old value\" );\n        require( !_maximumSupplyLocked, \"Max supply is locked and cannot be changed\" );\n\n        _maximumSupplyLocked = isLocked;\n    }\n\n    function setMintingSigner(\n        address mintingSigner \n    )\n        external\n        onlyOwner\n    {\n        _mintingSigner = mintingSigner;\n    }\n\n    function setPublicMintAllowed(\n        bool publicMintAllowed\n    )\n        external\n        onlyOwner \n    {\n        _publicMintAllowed = publicMintAllowed;\n    }\n\n    function setMintingPrice(\n        uint256 mintingPrice\n    )\n        external\n        onlyOwner \n    {\n        _mintingPrice = mintingPrice;\n    }\n\n    function setMaxMintingBatchQuantity(\n        uint256 maxMintingBatchQuantity\n    )\n        external\n        onlyOwner \n    {\n        _maxMintingBatchQuantity = maxMintingBatchQuantity;\n    }\n\n        function setRevealUri(\n        string memory revealUri\n    )\n        external \n        onlyOwner \n    {\n        require( !_isRevealed, \"Reveal has already been done\" );\n        _revealUri = revealUri;\n    }\n\n    function setIsRevealed(\n        bool isRevealed\n    )\n        external \n        onlyOwner \n    {\n        require( !_isRevealed, \"Reveal has already been done\" );\n        _isRevealed = isRevealed;\n    }\n\n    constructor( \n        uint256 mintingPrice, \n        address mintingSigner,\n        uint256 maxMintingBatchQuantity,\n        string memory prerevealUri,\n        address withdrawalAddress ) ERC721A( \"Swag Skulls\", \"SWAG\" ) \n    {\n        _mintingPrice = mintingPrice;\n        _mintingSigner = mintingSigner;\n        _maxMintingBatchQuantity = maxMintingBatchQuantity;\n        _prerevealUri = prerevealUri;\n        _withdrawalAddress = withdrawalAddress;\n    }\n\n    function hashMessage(\n        address addressTo\n    )\n        public\n        pure\n        returns ( bytes32 ) \n    {\n        return keccak256( abi.encodePacked( addressTo ) );\n    }\n\n    function mint(\n        uint256 quantity, \n        bytes memory signedMessage) \n        external \n        payable\n    {\n        require( (totalSupply() + quantity) <= _maximumSupply, \"Minting would exceed max supply\" );\n        require( quantity <= _maxMintingBatchQuantity, \"Attempt to mint more than maximum allowed\" );\n        require( msg.value >= ( quantity * _mintingPrice ), \"Invalid payment amount\" );\n\n        bytes32 recomputedHash = hashMessage( msg.sender );\n        require( verifyMessageSigner( recomputedHash, signedMessage, _mintingSigner ), \"Signature doesn't match\");\n\n        if( !_publicMintAllowed )\n        {\n            require( ( privateMintAddressToQuantity[ msg.sender ] + quantity ) <= _maxMintingBatchQuantity, \"Mint request exceeds maximum during private minting period\" );\n            privateMintAddressToQuantity[ msg.sender ] += quantity;\n        }\n        \n        _mint( msg.sender, quantity );\n    } \n\n    function verifyMessageSigner(\n        bytes32 hashedMessage, \n        bytes memory signedMessage,\n        address expectedSigner) \n            private \n            pure \n            returns ( bool ) {\n        \n        return ECDSA.toEthSignedMessageHash( hashedMessage ).recover( signedMessage ) == expectedSigner;\n    } \n\n    function ownerMint(\n        address to,\n        uint256 quantity )\n        external\n        onlyOwner \n    {\n        require( (totalSupply() + quantity) <= _maximumSupply, \"Minting would exceed max supply\" );\n        _mint( to, quantity );\n    }\n\n    function tokenURI(\n        uint256 tokenId ) \n        public \n        view \n        override( ERC721A, IERC721A ) \n        returns ( string memory ) \n    {\n        require( _exists( tokenId ), \"URI query for nonexistent token\" );\n\n        if ( _isRevealed ) {\n            return string( abi.encodePacked( _revealUri, _toString( tokenId ), \".json\" ) );\n        } else {\n            return _prerevealUri;\n        }\n    }\n\n    //reminder:  Never set to Lance's address!!\n    function setWithdrawalAddress( address newAddress ) \n        external \n        onlyOwner \n    {\n        _withdrawalAddress = newAddress;\n    }\n\n    function withdraw() \n        external \n        onlyOwner \n    {\n        (bool success, ) = _withdrawalAddress.call{value: address(this).balance}(\"\");\n        require(success);\n    }\n}"
    },
    "erc721a/contracts/extensions/ERC721AQueryable.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// ERC721A Contracts v4.1.0\n// Creator: Chiru Labs\n\npragma solidity ^0.8.4;\n\nimport './IERC721AQueryable.sol';\nimport '../ERC721A.sol';\n\n/**\n * @title ERC721A Queryable\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     *   - `addr` = `address(0)`\n     *   - `startTimestamp` = `0`\n     *   - `burned` = `false`\n     *   - `extraData` = `0`\n     *\n     * If the `tokenId` is burned:\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     *   - `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 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[] memory tokenIds) external view override returns (TokenOwnership[] memory) {\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 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 pfp collections should be fine).\n     */\n    function tokensOfOwner(address owner) external view 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"
    },
    "@openzeppelin/contracts/access/Ownable.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (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 Returns the address of the current owner.\n     */\n    function owner() public view virtual returns (address) {\n        return _owner;\n    }\n\n    /**\n     * @dev Throws if called by any account other than the owner.\n     */\n    modifier onlyOwner() {\n        require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n        _;\n    }\n\n    /**\n     * @dev Leaves the contract without owner. It will not be possible to call\n     * `onlyOwner` functions anymore. Can only be called by the current owner.\n     *\n     * NOTE: Renouncing ownership will leave the contract without an owner,\n     * thereby removing any functionality that is only available to the owner.\n     */\n    function renounceOwnership() public virtual onlyOwner {\n        _transferOwnership(address(0));\n    }\n\n    /**\n     * @dev Transfers ownership of the contract to a new account (`newOwner`).\n     * Can only be called by the current owner.\n     */\n    function transferOwnership(address newOwner) public virtual onlyOwner {\n        require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n        _transferOwnership(newOwner);\n    }\n\n    /**\n     * @dev Transfers ownership of the contract to a new account (`newOwner`).\n     * Internal function without access restriction.\n     */\n    function _transferOwnership(address newOwner) internal virtual {\n        address oldOwner = _owner;\n        _owner = newOwner;\n        emit OwnershipTransferred(oldOwner, newOwner);\n    }\n}\n"
    },
    "@openzeppelin/contracts/utils/cryptography/ECDSA.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.5.0) (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\n    }\n\n    function _throwError(RecoverError error) private pure {\n        if (error == RecoverError.NoError) {\n            return; // no error: do nothing\n        } else if (error == RecoverError.InvalidSignature) {\n            revert(\"ECDSA: invalid signature\");\n        } else if (error == RecoverError.InvalidSignatureLength) {\n            revert(\"ECDSA: invalid signature length\");\n        } else if (error == RecoverError.InvalidSignatureS) {\n            revert(\"ECDSA: invalid signature 's' value\");\n        } else if (error == RecoverError.InvalidSignatureV) {\n            revert(\"ECDSA: invalid signature 'v' value\");\n        }\n    }\n\n    /**\n     * @dev Returns the address that signed a hashed message (`hash`) with\n     * `signature` or error string. This address can then be used for verification purposes.\n     *\n     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:\n     * this function rejects them by requiring the `s` value to be in the lower\n     * half order, and the `v` value to be either 27 or 28.\n     *\n     * IMPORTANT: `hash` _must_ be the result of a hash operation for the\n     * verification to be secure: it is possible to craft signatures that\n     * recover to arbitrary addresses for non-hashed data. A safe way to ensure\n     * this is by receiving a hash of the original message (which may otherwise\n     * be too long), and then calling {toEthSignedMessageHash} on it.\n     *\n     * Documentation for signature generation:\n     * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]\n     * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]\n     *\n     * _Available since v4.3._\n     */\n    function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {\n        // Check the signature length\n        // - case 65: r,s,v signature (standard)\n        // - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._\n        if (signature.length == 65) {\n            bytes32 r;\n            bytes32 s;\n            uint8 v;\n            // ecrecover takes the signature parameters, and the only way to get them\n            // currently is to use assembly.\n            assembly {\n                r := mload(add(signature, 0x20))\n                s := mload(add(signature, 0x40))\n                v := byte(0, mload(add(signature, 0x60)))\n            }\n            return tryRecover(hash, v, r, s);\n        } else if (signature.length == 64) {\n            bytes32 r;\n            bytes32 vs;\n            // ecrecover takes the signature parameters, and the only way to get them\n            // currently is to use assembly.\n            assembly {\n                r := mload(add(signature, 0x20))\n                vs := mload(add(signature, 0x40))\n            }\n            return tryRecover(hash, r, vs);\n        } else {\n            return (address(0), RecoverError.InvalidSignatureLength);\n        }\n    }\n\n    /**\n     * @dev Returns the address that signed a hashed message (`hash`) with\n     * `signature`. This address can then be used for verification purposes.\n     *\n     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:\n     * this function rejects them by requiring the `s` value to be in the lower\n     * half order, and the `v` value to be either 27 or 28.\n     *\n     * IMPORTANT: `hash` _must_ be the result of a hash operation for the\n     * verification to be secure: it is possible to craft signatures that\n     * recover to arbitrary addresses for non-hashed data. A safe way to ensure\n     * this is by receiving a hash of the original message (which may otherwise\n     * be too long), and then calling {toEthSignedMessageHash} on it.\n     */\n    function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {\n        (address recovered, RecoverError error) = tryRecover(hash, signature);\n        _throwError(error);\n        return recovered;\n    }\n\n    /**\n     * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.\n     *\n     * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]\n     *\n     * _Available since v4.3._\n     */\n    function tryRecover(\n        bytes32 hash,\n        bytes32 r,\n        bytes32 vs\n    ) internal pure returns (address, RecoverError) {\n        bytes32 s = 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(\n        bytes32 hash,\n        bytes32 r,\n        bytes32 vs\n    ) internal pure returns (address) {\n        (address recovered, RecoverError error) = tryRecover(hash, r, vs);\n        _throwError(error);\n        return recovered;\n    }\n\n    /**\n     * @dev Overload of {ECDSA-tryRecover} that receives the `v`,\n     * `r` and `s` signature fields separately.\n     *\n     * _Available since v4.3._\n     */\n    function tryRecover(\n        bytes32 hash,\n        uint8 v,\n        bytes32 r,\n        bytes32 s\n    ) internal pure returns (address, RecoverError) {\n        // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature\n        // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines\n        // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most\n        // signatures from current libraries generate a unique signature with an s-value in the lower half order.\n        //\n        // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value\n        // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or\n        // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept\n        // these malleable signatures as well.\n        if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {\n            return (address(0), RecoverError.InvalidSignatureS);\n        }\n        if (v != 27 && v != 28) {\n            return (address(0), RecoverError.InvalidSignatureV);\n        }\n\n        // If the signature is valid (and not malleable), return the signer address\n        address signer = ecrecover(hash, v, r, s);\n        if (signer == address(0)) {\n            return (address(0), RecoverError.InvalidSignature);\n        }\n\n        return (signer, RecoverError.NoError);\n    }\n\n    /**\n     * @dev Overload of {ECDSA-recover} that receives the `v`,\n     * `r` and `s` signature fields separately.\n     */\n    function recover(\n        bytes32 hash,\n        uint8 v,\n        bytes32 r,\n        bytes32 s\n    ) internal pure returns (address) {\n        (address recovered, RecoverError error) = tryRecover(hash, v, r, s);\n        _throwError(error);\n        return recovered;\n    }\n\n    /**\n     * @dev Returns an Ethereum Signed Message, created from a `hash`. This\n     * produces hash corresponding to the one signed with the\n     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]\n     * JSON-RPC method as part of EIP-191.\n     *\n     * See {recover}.\n     */\n    function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {\n        // 32 is the length in bytes of hash,\n        // enforced by the type signature above\n        return keccak256(abi.encodePacked(\"\\x19Ethereum Signed Message:\\n32\", hash));\n    }\n\n    /**\n     * @dev Returns an Ethereum Signed Message, created from `s`. This\n     * produces hash corresponding to the one signed with the\n     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]\n     * JSON-RPC method as part of EIP-191.\n     *\n     * See {recover}.\n     */\n    function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {\n        return keccak256(abi.encodePacked(\"\\x19Ethereum Signed Message:\\n\", Strings.toString(s.length), s));\n    }\n\n    /**\n     * @dev Returns an Ethereum Signed Typed Data, created from a\n     * `domainSeparator` and a `structHash`. This produces hash corresponding\n     * to the one signed with the\n     * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]\n     * JSON-RPC method as part of EIP-712.\n     *\n     * See {recover}.\n     */\n    function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {\n        return keccak256(abi.encodePacked(\"\\x19\\x01\", domainSeparator, structHash));\n    }\n}\n"
    },
    "erc721a/contracts/extensions/IERC721AQueryable.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// ERC721A Contracts v4.1.0\n// Creator: Chiru Labs\n\npragma solidity ^0.8.4;\n\nimport '../IERC721A.sol';\n\n/**\n * @dev Interface of an ERC721AQueryable compliant contract.\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     *   - `addr` = `address(0)`\n     *   - `startTimestamp` = `0`\n     *   - `burned` = `false`\n     *\n     * If the `tokenId` is burned:\n     *   - `addr` = `<Address of owner before token was burned>`\n     *   - `startTimestamp` = `<Timestamp when token was burned>`\n     *   - `burned = `true`\n     *\n     * Otherwise:\n     *   - `addr` = `<Address of owner>`\n     *   - `startTimestamp` = `<Timestamp of start of ownership>`\n     *   - `burned = `false`\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 pfp collections should be fine).\n     */\n    function tokensOfOwner(address owner) external view returns (uint256[] memory);\n}\n"
    },
    "erc721a/contracts/ERC721A.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// ERC721A Contracts v4.1.0\n// Creator: Chiru Labs\n\npragma solidity ^0.8.4;\n\nimport './IERC721A.sol';\n\n/**\n * @dev ERC721 token receiver interface.\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 * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard,\n * including the Metadata extension. Built to optimize for lower gas during batch mints.\n *\n * Assumes serials are sequentially minted starting at `_startTokenId()`\n * (defaults to 0, e.g. 0, 1, 2, 3..).\n *\n * Assumes that an owner cannot have more than 2**64 - 1 (max value of uint64) of supply.\n *\n * Assumes that the maximum token id cannot exceed 2**256 - 1 (max value of uint256).\n */\ncontract ERC721A is IERC721A {\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 tokenId of the next token 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 => address) private _tokenApprovals;\n\n    // Mapping from owner to operator approvals\n    mapping(address => mapping(address => bool)) private _operatorApprovals;\n\n    constructor(string memory name_, string memory symbol_) {\n        _name = name_;\n        _symbol = symbol_;\n        _currentIndex = _startTokenId();\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 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 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 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 returns (uint256) {\n        return _burnCounter;\n    }\n\n    /**\n     * @dev See {IERC165-supportsInterface}.\n     */\n    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {\n        // The interface IDs are constants representing the first 4 bytes of the XOR of\n        // all function selectors in the interface. See: 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     * @dev See {IERC721-balanceOf}.\n     */\n    function balanceOf(address owner) public view 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 {\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     * 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 ownership that has an address and is not burned\n                        // before an ownership that does not have an address and is not burned.\n                        // Hence, curr will not underflow.\n                        //\n                        // We can directly compare the packed value.\n                        // If the address is zero, packed is zero.\n                        while (packed == 0) {\n                            packed = _packedOwnerships[--curr];\n                        }\n                        return packed;\n                    }\n                }\n        }\n        revert OwnerQueryForNonexistentToken();\n    }\n\n    /**\n     * 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     * Returns the unpacked `TokenOwnership` struct at `index`.\n     */\n    function _ownershipAt(uint256 index) internal view 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 {\n        if (_packedOwnerships[index] == 0) {\n            _packedOwnerships[index] = _packedOwnershipOf(index);\n        }\n    }\n\n    /**\n     * Gas spent here starts off proportional to the maximum mint batch size.\n     * It gradually moves to O(1) as tokens get transferred around in the collection over time.\n     */\n    function _ownershipOf(uint256 tokenId) internal view returns (TokenOwnership memory) {\n        return _unpackedOwnership(_packedOwnershipOf(tokenId));\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 See {IERC721-ownerOf}.\n     */\n    function ownerOf(uint256 tokenId) public view override returns (address) {\n        return address(uint160(_packedOwnershipOf(tokenId)));\n    }\n\n    /**\n     * @dev See {IERC721Metadata-name}.\n     */\n    function name() public view virtual override returns (string memory) {\n        return _name;\n    }\n\n    /**\n     * @dev See {IERC721Metadata-symbol}.\n     */\n    function symbol() public view virtual override returns (string memory) {\n        return _symbol;\n    }\n\n    /**\n     * @dev See {IERC721Metadata-tokenURI}.\n     */\n    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {\n        if (!_exists(tokenId)) revert URIQueryForNonexistentToken();\n\n        string memory baseURI = _baseURI();\n        return bytes(baseURI).length != 0 ? string(abi.encodePacked(baseURI, _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     * @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     * @dev See {IERC721-approve}.\n     */\n    function approve(address to, uint256 tokenId) public override {\n        address owner = ownerOf(tokenId);\n\n        if (_msgSenderERC721A() != owner)\n            if (!isApprovedForAll(owner, _msgSenderERC721A())) {\n                revert ApprovalCallerNotOwnerNorApproved();\n            }\n\n        _tokenApprovals[tokenId] = to;\n        emit Approval(owner, to, tokenId);\n    }\n\n    /**\n     * @dev See {IERC721-getApproved}.\n     */\n    function getApproved(uint256 tokenId) public view override returns (address) {\n        if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken();\n\n        return _tokenApprovals[tokenId];\n    }\n\n    /**\n     * @dev See {IERC721-setApprovalForAll}.\n     */\n    function setApprovalForAll(address operator, bool approved) public virtual override {\n        if (operator == _msgSenderERC721A()) revert ApproveToCaller();\n\n        _operatorApprovals[_msgSenderERC721A()][operator] = approved;\n        emit ApprovalForAll(_msgSenderERC721A(), operator, approved);\n    }\n\n    /**\n     * @dev See {IERC721-isApprovedForAll}.\n     */\n    function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {\n        return _operatorApprovals[owner][operator];\n    }\n\n    /**\n     * @dev See {IERC721-safeTransferFrom}.\n     */\n    function safeTransferFrom(\n        address from,\n        address to,\n        uint256 tokenId\n    ) public virtual override {\n        safeTransferFrom(from, to, tokenId, '');\n    }\n\n    /**\n     * @dev See {IERC721-safeTransferFrom}.\n     */\n    function safeTransferFrom(\n        address from,\n        address to,\n        uint256 tokenId,\n        bytes memory _data\n    ) public virtual override {\n        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 Returns whether `tokenId` exists.\n     *\n     * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.\n     *\n     * Tokens start existing when they are minted (`_mint`),\n     */\n    function _exists(uint256 tokenId) internal view returns (bool) {\n        return\n            _startTokenId() <= tokenId &&\n            tokenId < _currentIndex && // If within bounds,\n            _packedOwnerships[tokenId] & BITMASK_BURNED == 0; // and not burned.\n    }\n\n    /**\n     * @dev Equivalent to `_safeMint(to, quantity, '')`.\n     */\n    function _safeMint(address to, uint256 quantity) internal {\n        _safeMint(to, quantity, '');\n    }\n\n    /**\n     * @dev Safely mints `quantity` tokens and transfers them to `to`.\n     *\n     * Requirements:\n     *\n     * - If `to` refers to a smart contract, it must implement\n     *   {IERC721Receiver-onERC721Received}, which is called for each safe transfer.\n     * - `quantity` must be greater than 0.\n     *\n     * 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 {\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 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 {\n        uint256 startTokenId = _currentIndex;\n        if (to == address(0)) revert MintToZeroAddress();\n        if (quantity == 0) revert MintZeroQuantity();\n\n        _beforeTokenTransfers(address(0), to, startTokenId, quantity);\n\n        // Overflows are incredibly unrealistic.\n        // `balance` 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 tokenId = startTokenId;\n            uint256 end = startTokenId + quantity;\n            do {\n                emit Transfer(address(0), to, tokenId++);\n            } while (tokenId < end);\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 {\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 Returns the storage slot and value for the approved address of `tokenId`.\n     */\n    function _getApprovedAddress(uint256 tokenId)\n        private\n        view\n        returns (uint256 approvedAddressSlot, address approvedAddress)\n    {\n        mapping(uint256 => address) storage tokenApprovalsPtr = _tokenApprovals;\n        // The following is equivalent to `approvedAddress = _tokenApprovals[tokenId]`.\n        assembly {\n            // Compute the slot.\n            mstore(0x00, tokenId)\n            mstore(0x20, tokenApprovalsPtr.slot)\n            approvedAddressSlot := keccak256(0x00, 0x40)\n            // Load the slot's value from storage.\n            approvedAddress := sload(approvedAddressSlot)\n        }\n    }\n\n    /**\n     * @dev Returns whether the `approvedAddress` is equals to `from` or `msgSender`.\n     */\n    function _isOwnerOrApproved(\n        address approvedAddress,\n        address from,\n        address msgSender\n    ) private pure returns (bool result) {\n        assembly {\n            // Mask `from` to the lower 160 bits, in case the upper bits somehow aren't clean.\n            from := and(from, 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 == from || msgSender == approvedAddress`.\n            result := or(eq(msgSender, from), eq(msgSender, approvedAddress))\n        }\n    }\n\n    /**\n     * @dev Transfers `tokenId` from `from` to `to`.\n     *\n     * Requirements:\n     *\n     * - `to` cannot be the zero address.\n     * - `tokenId` token must be owned by `from`.\n     *\n     * Emits a {Transfer} event.\n     */\n    function transferFrom(\n        address from,\n        address to,\n        uint256 tokenId\n    ) public virtual override {\n        uint256 prevOwnershipPacked = _packedOwnershipOf(tokenId);\n\n        if (address(uint160(prevOwnershipPacked)) != from) revert TransferFromIncorrectOwner();\n\n        (uint256 approvedAddressSlot, address approvedAddress) = _getApprovedAddress(tokenId);\n\n        // The nested ifs save around 20+ gas over a compound boolean condition.\n        if (!_isOwnerOrApproved(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 `_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) = _getApprovedAddress(tokenId);\n\n        if (approvalCheck) {\n            // The nested ifs save around 20+ gas over a compound boolean condition.\n            if (!_isOwnerOrApproved(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     * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target contract.\n     *\n     * @param from address representing the previous owner of the given token ID\n     * @param to target address that will receive the tokens\n     * @param tokenId uint256 ID of the token to be transferred\n     * @param _data bytes optional data to send along with the call\n     * @return bool whether the call correctly returned the expected magic value\n     */\n    function _checkContractOnERC721Received(\n        address from,\n        address to,\n        uint256 tokenId,\n        bytes memory _data\n    ) private returns (bool) {\n        try 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     * @dev Directly sets the extra data for the ownership data `index`.\n     */\n    function _setExtraDataAt(uint256 index, uint24 extraData) internal {\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 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     * @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 Hook that is called before a set of serially-ordered token ids are about to be transferred.\n     * This includes minting.\n     * And also called before burning one token.\n     *\n     * startTokenId - the first token id to be transferred\n     * quantity - the amount to be transferred\n     *\n     * Calling conditions:\n     *\n     * - When `from` and `to` are both non-zero, `from`'s `tokenId` will be\n     * transferred to `to`.\n     * - When `from` is zero, `tokenId` will be minted for `to`.\n     * - When `to` is zero, `tokenId` will be burned by `from`.\n     * - `from` and `to` are never both zero.\n     */\n    function _beforeTokenTransfers(\n        address from,\n        address to,\n        uint256 startTokenId,\n        uint256 quantity\n    ) internal virtual {}\n\n    /**\n     * @dev Hook that is called after a set of serially-ordered token ids have been transferred.\n     * 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 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 returns (string memory ptr) {\n        assembly {\n            // The maximum value of a uint256 contains 78 digits (1 byte per digit),\n            // but we allocate 128 bytes to keep the free memory pointer 32-byte word aliged.\n            // We will need 1 32-byte word to store the length,\n            // and 3 32-byte words to store a maximum of 78 digits. Total: 32 + 3 * 32 = 128.\n            ptr := add(mload(0x40), 128)\n            // Update the free memory pointer to allocate.\n            mstore(0x40, ptr)\n\n            // Cache the end of the memory to calculate the length later.\n            let end := ptr\n\n            // We write the string from the rightmost digit to the leftmost digit.\n            // The following is essentially a do-while loop that also handles the zero case.\n            // Costs a bit more than early returning for the zero case,\n            // but cheaper in terms of deployment and overall runtime costs.\n            for {\n                // Initialize and perform the first pass without check.\n                let temp := value\n                // Move the pointer 1 byte leftwards to point to an empty character slot.\n                ptr := sub(ptr, 1)\n                // Write the character to the pointer. 48 is the ASCII index of '0'.\n                mstore8(ptr, add(48, mod(temp, 10)))\n                temp := div(temp, 10)\n            } temp {\n                // Keep dividing `temp` until zero.\n                temp := div(temp, 10)\n            } {\n                // Body of the for loop.\n                ptr := sub(ptr, 1)\n                mstore8(ptr, add(48, mod(temp, 10)))\n            }\n\n            let length := sub(end, ptr)\n            // Move the pointer 32 bytes leftwards to make room for the length.\n            ptr := sub(ptr, 32)\n            // Store the length.\n            mstore(ptr, length)\n        }\n    }\n}\n"
    },
    "erc721a/contracts/IERC721A.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// ERC721A Contracts v4.1.0\n// Creator: Chiru Labs\n\npragma solidity ^0.8.4;\n\n/**\n * @dev Interface of an ERC721A compliant contract.\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     * The caller cannot approve to their own address.\n     */\n    error ApproveToCaller();\n\n    /**\n     * Cannot query the balance for the zero address.\n     */\n    error BalanceQueryForZeroAddress();\n\n    /**\n     * Cannot mint to the zero address.\n     */\n    error MintToZeroAddress();\n\n    /**\n     * The quantity of tokens minted must be more than zero.\n     */\n    error MintZeroQuantity();\n\n    /**\n     * The token does not exist.\n     */\n    error OwnerQueryForNonexistentToken();\n\n    /**\n     * The caller must own the token or be an approved operator.\n     */\n    error TransferCallerNotOwnerNorApproved();\n\n    /**\n     * The token must be owned by `from`.\n     */\n    error TransferFromIncorrectOwner();\n\n    /**\n     * Cannot safely transfer to a contract that does not implement the ERC721Receiver interface.\n     */\n    error TransferToNonERC721ReceiverImplementer();\n\n    /**\n     * Cannot transfer to the zero address.\n     */\n    error TransferToZeroAddress();\n\n    /**\n     * The token does not exist.\n     */\n    error URIQueryForNonexistentToken();\n\n    /**\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    struct TokenOwnership {\n        // The address of the owner.\n        address addr;\n        // Keeps track of the start time of ownership with minimal overhead for tokenomics.\n        uint64 startTimestamp;\n        // Whether the token has been burned.\n        bool burned;\n        // Arbitrary data similar to `startTimestamp` that can be set through `_extraData`.\n        uint24 extraData;\n    }\n\n    /**\n     * @dev Returns the total amount of tokens stored by the contract.\n     *\n     * Burned tokens are calculated here, use `_totalMinted()` if you want to count just minted tokens.\n     */\n    function totalSupply() external view returns (uint256);\n\n    // ==============================\n    //            IERC165\n    // ==============================\n\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    // ==============================\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 (`approved`) `operator` to manage all of its assets.\n     */\n    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);\n\n    /**\n     * @dev Returns the number of tokens in ``owner``'s account.\n     */\n    function balanceOf(address owner) external view returns (uint256 balance);\n\n    /**\n     * @dev Returns the owner of the `tokenId` token.\n     *\n     * Requirements:\n     *\n     * - `tokenId` must exist.\n     */\n    function ownerOf(uint256 tokenId) external view returns (address owner);\n\n    /**\n     * @dev Safely transfers `tokenId` token from `from` to `to`.\n     *\n     * Requirements:\n     *\n     * - `from` cannot be the zero address.\n     * - `to` cannot be the zero address.\n     * - `tokenId` token must exist and be owned by `from`.\n     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.\n     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.\n     *\n     * Emits a {Transfer} event.\n     */\n    function safeTransferFrom(\n        address from,\n        address to,\n        uint256 tokenId,\n        bytes calldata data\n    ) external;\n\n    /**\n     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients\n     * are aware of the ERC721 protocol to prevent tokens from being forever locked.\n     *\n     * Requirements:\n     *\n     * - `from` cannot be the zero address.\n     * - `to` cannot be the zero address.\n     * - `tokenId` token must exist and be owned by `from`.\n     * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.\n     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.\n     *\n     * Emits a {Transfer} event.\n     */\n    function safeTransferFrom(\n        address from,\n        address to,\n        uint256 tokenId\n    ) external;\n\n    /**\n     * @dev Transfers `tokenId` token from `from` to `to`.\n     *\n     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.\n     *\n     * Requirements:\n     *\n     * - `from` cannot be the zero address.\n     * - `to` cannot be the zero address.\n     * - `tokenId` token must be owned by `from`.\n     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.\n     *\n     * Emits a {Transfer} event.\n     */\n    function transferFrom(\n        address from,\n        address to,\n        uint256 tokenId\n    ) external;\n\n    /**\n     * @dev Gives permission to `to` to transfer `tokenId` token to another account.\n     * The approval is cleared when the token is transferred.\n     *\n     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.\n     *\n     * Requirements:\n     *\n     * - The caller must own the token or be an approved operator.\n     * - `tokenId` must exist.\n     *\n     * Emits an {Approval} event.\n     */\n    function approve(address to, uint256 tokenId) external;\n\n    /**\n     * @dev Approve or remove `operator` as an operator for the caller.\n     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.\n     *\n     * Requirements:\n     *\n     * - The `operator` cannot be the caller.\n     *\n     * Emits an {ApprovalForAll} event.\n     */\n    function setApprovalForAll(address operator, bool _approved) external;\n\n    /**\n     * @dev Returns the account approved for `tokenId` token.\n     *\n     * Requirements:\n     *\n     * - `tokenId` must exist.\n     */\n    function getApproved(uint256 tokenId) external view returns (address operator);\n\n    /**\n     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.\n     *\n     * See {setApprovalForAll}\n     */\n    function isApprovedForAll(address owner, address operator) external view returns (bool);\n\n    // ==============================\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` (inclusive) is transferred from `from` to `to`,\n     * as defined in the ERC2309 standard. See `_mintERC2309` for more details.\n     */\n    event ConsecutiveTransfer(uint256 indexed fromTokenId, uint256 toTokenId, address indexed from, address indexed to);\n}\n"
    },
    "@openzeppelin/contracts/utils/Context.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract Context {\n    function _msgSender() internal view virtual returns (address) {\n        return msg.sender;\n    }\n\n    function _msgData() internal view virtual returns (bytes calldata) {\n        return msg.data;\n    }\n}\n"
    },
    "@openzeppelin/contracts/utils/Strings.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev String operations.\n */\nlibrary Strings {\n    bytes16 private constant _HEX_SYMBOLS = \"0123456789abcdef\";\n\n    /**\n     * @dev Converts a `uint256` to its ASCII `string` decimal representation.\n     */\n    function toString(uint256 value) internal pure returns (string memory) {\n        // Inspired by OraclizeAPI's implementation - MIT licence\n        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol\n\n        if (value == 0) {\n            return \"0\";\n        }\n        uint256 temp = value;\n        uint256 digits;\n        while (temp != 0) {\n            digits++;\n            temp /= 10;\n        }\n        bytes memory buffer = new bytes(digits);\n        while (value != 0) {\n            digits -= 1;\n            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));\n            value /= 10;\n        }\n        return string(buffer);\n    }\n\n    /**\n     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.\n     */\n    function toHexString(uint256 value) internal pure returns (string memory) {\n        if (value == 0) {\n            return \"0x00\";\n        }\n        uint256 temp = value;\n        uint256 length = 0;\n        while (temp != 0) {\n            length++;\n            temp >>= 8;\n        }\n        return toHexString(value, length);\n    }\n\n    /**\n     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.\n     */\n    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {\n        bytes memory buffer = new bytes(2 * length + 2);\n        buffer[0] = \"0\";\n        buffer[1] = \"x\";\n        for (uint256 i = 2 * length + 1; i > 1; --i) {\n            buffer[i] = _HEX_SYMBOLS[value & 0xf];\n            value >>= 4;\n        }\n        require(value == 0, \"Strings: hex length insufficient\");\n        return string(buffer);\n    }\n}\n"
    }
  },
  "settings": {
    "optimizer": {
      "enabled": true,
      "runs": 200
    },
    "outputSelection": {
      "*": {
        "*": [
          "evm.bytecode",
          "evm.deployedBytecode",
          "devdoc",
          "userdoc",
          "metadata",
          "abi"
        ]
      }
    },
    "libraries": {}
  }
}