{"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"},"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 \u0027s\u0027 value\");\n        } else if (error == RecoverError.InvalidSignatureV) {\n            revert(\"ECDSA: invalid signature \u0027v\u0027 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 \u0026 bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);\n        uint8 v = uint8((uint256(vs) \u003e\u003e 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 \u003c s \u003c 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) \u003e 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {\n            return (address(0), RecoverError.InvalidSignatureS);\n        }\n        if (v != 27 \u0026\u0026 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"},"EIP712Whitelisting.sol":{"content":"//SPDX-License-Identifier: Unlicense\npragma solidity ^0.8.0;\n\nimport \"./ECDSA.sol\";\n\ncontract EIP712Whitelisting {\n  using ECDSA for bytes32;\n\n  // The key used to sign whitelist signatures.\n  // We will check to ensure that the key that signed the signature\n  // is this one that we expect.\n  address whitelistSigningKey = address(0);\n\n  // Domain Separator is the EIP-712 defined structure that defines what contract\n  // and chain these signatures can be used for.  This ensures people can\u0027t take\n  // a signature used to mint on one contract and use it for another, or a signature\n  // from testnet to replay on mainnet.\n  // It has to be created in the constructor so we can dynamically grab the chainId.\n  // https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md#definition-of-domainseparator\n  bytes32 public DOMAIN_SEPARATOR;\n\n  // The typehash for the data type specified in the structured data\n  // https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md#rationale-for-typehash\n  // This should match whats in the client side whitelist signing code\n  // https://github.com/msfeldstein/EIP712-whitelisting/blob/main/test/signWhitelist.ts#L22\n  bytes32 public constant MINTER_TYPEHASH = keccak256(\"Minter(address wallet)\");\n\n  constructor(string memory tokenName, string memory version) {\n    // This should match whats in the client side whitelist signing code\n    // https://github.com/msfeldstein/EIP712-whitelisting/blob/main/test/signWhitelist.ts#L12\n    DOMAIN_SEPARATOR = keccak256(\n      abi.encode(\n        keccak256(\"EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)\"),\n        // This should match the domain you set in your client side signing.\n        keccak256(bytes(tokenName)),\n        keccak256(bytes(version)),\n        block.chainid,\n        address(this)\n      )\n    );\n  }\n\n  function _setWhitelistSigningAddress(address newSigningKey) internal {\n    whitelistSigningKey = newSigningKey;\n  }\n\n  modifier requiresWhitelist(bytes calldata signature) {\n    require(whitelistSigningKey != address(0), \"Whitelist not enabled; please set the private key.\");\n    // Verify EIP-712 signature by recreating the data structure\n    // that we signed on the client side, and then using that to recover\n    // the address that signed the signature for this data.\n    bytes32 digest = keccak256(abi.encodePacked(\"\\x19\\x01\", DOMAIN_SEPARATOR, keccak256(abi.encode(MINTER_TYPEHASH, msg.sender))));\n    // Use the recover method to see what address was used to create\n    // the signature on this data.\n    // Note that if the digest doesn\u0027t exactly match what was signed we\u0027ll\n    // get a random recovered address.\n    address recoveredAddress = digest.recover(signature);\n    require(recoveredAddress == whitelistSigningKey, \"Invalid signature\");\n    _;\n  }\n}\n"},"MintingRouter.sol":{"content":"//SPDX-License-Identifier: UNLICENSED\n\n// ███████╗███╗   ██╗███████╗ █████╗ ██╗  ██╗██╗   ██╗     ██████╗  ██████╗ ██████╗ ██╗     ██╗███╗   ██╗███████╗\n// ██╔════╝████╗  ██║██╔════╝██╔══██╗██║ ██╔╝╚██╗ ██╔╝    ██╔════╝ ██╔═══██╗██╔══██╗██║     ██║████╗  ██║██╔════╝\n// ███████╗██╔██╗ ██║█████╗  ███████║█████╔╝  ╚████╔╝     ██║  ███╗██║   ██║██████╔╝██║     ██║██╔██╗ ██║███████╗\n// ╚════██║██║╚██╗██║██╔══╝  ██╔══██║██╔═██╗   ╚██╔╝      ██║   ██║██║   ██║██╔══██╗██║     ██║██║╚██╗██║╚════██║\n// ███████║██║ ╚████║███████╗██║  ██║██║  ██╗   ██║       ╚██████╔╝╚██████╔╝██████╔╝███████╗██║██║ ╚████║███████║\n// ╚══════╝╚═╝  ╚═══╝╚══════╝╚═╝  ╚═╝╚═╝  ╚═╝   ╚═╝        ╚═════╝  ╚═════╝ ╚═════╝ ╚══════╝╚═╝╚═╝  ╚═══╝╚══════╝\n\npragma solidity 0.8.13;\n\n// Imports\nimport \"./ReentrancyGuard.sol\";\nimport \"./Ownable.sol\";\nimport \"./EIP712Whitelisting.sol\";\n\n/// NFT Interface\ninterface INFT {\n    function mint(address recipient, uint256 quantity) external;\n    function preminted() external view returns (bool);\n    function MAX_SUPPLY() external view returns(uint256);\n    function totalSupply() external view returns(uint256);\n}\n\n/**\n * @title The Minting Router contract.\n */\ncontract MintingRouter is EIP712Whitelisting, ReentrancyGuard, Ownable {\n    // The available sale types.\n    enum SaleRoundType {\n        WHITELIST,\n        PUBLIC\n    }\n\n    // The sale round details.\n    struct SaleRound {\n        // The type of the sale.\n        SaleRoundType saleType;\n        // The price of a token during the sale round.\n        uint256 price;\n        // The total number of tokens available for minting during the sale round.\n        uint256 totalAmount;\n        // The total number of tokens available for minting by a single wallet during the sale round.\n        uint256 limitAmountPerWallet;\n        // The maximum number of tokens available for minting per single transaction.\n        uint256 maxAmountPerMint;\n        // The flag that indicates if the sale round is enabled.\n        bool enabled;\n    }\n\n    /// @notice Indicates that tokens are unlimited.\n    uint256 private constant UNLIMITED_AMOUNT = 0;\n    /// @notice The current sale round details.\n    SaleRound public saleRound;\n    /// @notice The current sale round index.\n    uint256 public currentSaleIndex;\n    /// @notice The number of NFTs minted during an ongoing sale round.\n    uint256 public totalMintedAmountCurrentRound;\n    /// @notice The number of NFTs minted during a sale round.\n    mapping(uint256 =\u003e uint256) public mintedAmountPerRound;\n    /// @notice The NFT contract.\n    INFT private _nftContract;\n    /// @notice The number of NFTs minted during a sale round per wallet.\n    mapping(uint256 =\u003e mapping(address =\u003e uint256)) private _mintedAmountPerAddress;\n\n    /**\n     * @notice The smart contract constructor that initializes the minting router.\n     * @param nftContract_ The NFT contract.\n     * @param tokenName The name of the NFT token.\n     * @param version The version of the project.\n     */\n    constructor(INFT nftContract_, string memory tokenName, string memory version) EIP712Whitelisting(tokenName, version)   {\n        // Initialize the variables.\n        _nftContract = nftContract_;\n        // Set the initial dummy value for the current sale index.\n        currentSaleIndex = type(uint256).max;\n    }\n\n    /**\n     * @notice Changes the current sale details.\n     * @param price The price of an NFT for the current sale round.\n     * @param totalAmount The total amount of NFTs available for the current sale round.\n     * @param limitAmountPerWallet The total number of NFTs that can be minted by a single wallet during the sale round.\n     * @param maxAmountPerMint The maximum number of tokens available for minting per single transaction.\n     */\n    function changeSaleRoundParams(\n        uint256 price,\n        uint256 totalAmount,\n        uint8 limitAmountPerWallet,\n        uint256 maxAmountPerMint\n    ) external onlyOwner {\n        saleRound.price = price;\n        saleRound.totalAmount = totalAmount;\n        saleRound.limitAmountPerWallet = limitAmountPerWallet;\n        saleRound.maxAmountPerMint = maxAmountPerMint;\n    }\n\n    /**\n     * @notice Creates a new sale round.\n     * @dev Requires sales to be disabled and reserves to be minted.\n     * @param saleType The type of the sale round (WHITELIST - 0, PUBLIC SALE - 1).\n     * @param price The price of an NFT for the current sale round.\n     * @param totalAmount The total amount of NFTs available for the current sale round.\n     * @param limitAmountPerWallet The total number of NFTs that can be minted by a single wallet during the sale round.\n     * @param maxAmountPerMint The maximum number of tokens available for minting per single transaction.\n     */\n    function createSaleRound(\n        SaleRoundType saleType,\n        uint256 price,\n        uint256 totalAmount,\n        uint256 limitAmountPerWallet,\n        uint256 maxAmountPerMint\n    ) external onlyOwner {\n        // Check if the reserves are minted.\n        bool preminted = _nftContract.preminted();\n        require(preminted == true, \"Must mint reserved tokens\");\n        // Check if the sales are closed.\n        require(saleRound.enabled == false, \"Must disable the current round\");\n        // Increment the sale round index.\n        if (currentSaleIndex == type(uint256).max) {\n            currentSaleIndex = 0;\n        } else {\n            currentSaleIndex += 1;\n        }\n        // Set new sale parameters.\n        saleRound.price = price;\n        saleRound.totalAmount = totalAmount;\n        saleRound.limitAmountPerWallet = limitAmountPerWallet;\n        saleRound.maxAmountPerMint = maxAmountPerMint;\n        saleRound.saleType = saleType;\n\n        // Reset the number of tokens minted during the round.\n        totalMintedAmountCurrentRound = 0;\n    }\n\n    /**\n     * @notice Starts the sale round.\n     */\n    function enableSaleRound() external onlyOwner {\n        require(saleRound.enabled == false, \"Sale round was already enabled\");\n        saleRound.enabled = true;\n    }\n\n    /**\n     * @notice Closes the sale round.\n     */\n    function disableSaleRound() external onlyOwner {\n        require(saleRound.enabled == true, \"Sale round was already disabled\");\n        saleRound.enabled = false;\n    }\n\n    /**\n     * @notice Mints NFTs during whitelist sale rounds.\n     * @dev Requires the current sale round to be a WHITELIST round.\n     * @param recipient The address that will receive the minted NFT.\n     * @param quantity The number of NFTs to mint.\n     * @param signature The signature of a whitelisted minter.\n     */\n    function whitelistMint(address recipient, uint256 quantity, bytes calldata signature) external payable requiresWhitelist(signature) nonReentrant {\n        require(saleRound.saleType == SaleRoundType.WHITELIST, \"Not a whitelist round\");\n        _mint(msg.value, recipient, quantity);\n    }\n\n    /**\n     * @notice Mints NFTs during public sale rounds.\n     * @dev Requires the current sale round to be a PUBLIC round.\n     * @param recipient The address that will receive the minted NFT.\n     * @param quantity The number of NFTs to mint.\n     */\n    function publicMint(address recipient, uint256 quantity) external payable nonReentrant {\n        require(saleRound.saleType == SaleRoundType.PUBLIC, \"Not a public round\");\n        _mint(msg.value, recipient, quantity);\n    }\n\n    /**\n     * @notice Sets the address that is used during whitelist generation.\n     * @param signer The address used during whitelist generation.\n     */\n    function setWhitelistSigningAddress(address signer) public onlyOwner {\n        _setWhitelistSigningAddress(signer);\n    }\n\n    /**\n     * @notice Withdraws funds to the owner wallet.\n     */\n    function withdraw() public onlyOwner returns(bool) {\n        uint256 balance = address(this).balance;\n        payable(msg.sender).transfer(balance);\n        return true;\n    }\n\n    /**\n     * @notice Calculates the number of tokens a minter is allowed to mint.\n     * @param minter The minter address.\n     * @return The number of tokens that a minter can mint.\n     */\n    function allowedTokenCount(address minter) public view returns (uint256) {\n        if (saleRound.enabled == false) {\n            return 0;\n        }\n        // Calculate the allowed number of tokens to mint by a wallet.\n        uint256 allowedWalletCount = saleRound.limitAmountPerWallet != UNLIMITED_AMOUNT\n        ? (saleRound.limitAmountPerWallet \u003e _mintedAmountPerAddress[currentSaleIndex][minter]\n        ? saleRound.limitAmountPerWallet - _mintedAmountPerAddress[currentSaleIndex][minter] : 0)\n        : _nftContract.MAX_SUPPLY() - _nftContract.totalSupply();\n        // Calculate the total number of tokens left.\n        uint256 availableTokenCount = saleRound.totalAmount != UNLIMITED_AMOUNT\n        ? (saleRound.totalAmount \u003e mintedAmountPerRound[currentSaleIndex]\n        ? saleRound.totalAmount - mintedAmountPerRound[currentSaleIndex] : 0)\n        : _nftContract.MAX_SUPPLY() - _nftContract.totalSupply();\n        // Calculate the limit of the number of tokens per single mint.\n        uint256 allowedAmountPerMint = saleRound.maxAmountPerMint != UNLIMITED_AMOUNT\n        ? saleRound.maxAmountPerMint : _nftContract.MAX_SUPPLY() - _nftContract.totalSupply();\n        // Get the minimum of all values.\n        uint256 allowedTokens = allowedWalletCount \u003c availableTokenCount ? allowedWalletCount : availableTokenCount;\n        allowedTokens = allowedAmountPerMint \u003c allowedTokens ? allowedAmountPerMint : allowedTokens;\n        return allowedTokens;\n    }\n\n    /**\n     * @notice Returns the number of tokens left for the running sale round.\n     */\n    function tokensLeft() public view returns (uint256) {\n        if (saleRound.enabled == false) {\n            return 0;\n        }\n\n        return saleRound.totalAmount != UNLIMITED_AMOUNT\n        ? (saleRound.totalAmount \u003e mintedAmountPerRound[currentSaleIndex]\n        ? saleRound.totalAmount - mintedAmountPerRound[currentSaleIndex] : 0)\n        : _nftContract.MAX_SUPPLY() - _nftContract.totalSupply();\n    }\n\n    /**\n     * @notice Mints NFTs.\n     * @param value The purchase fee.\n     * @param recipient The address that will receive the minted NFT.\n     * @param quantity The number of NFTs to mint.\n     */\n    function _mint(uint256 value, address recipient, uint256 quantity) private {\n        require(saleRound.enabled == true, \"Sale round is disabled\");\n        require(quantity \u003e 0, \"Quantity must be \u003e 0\");\n\n        if (saleRound.maxAmountPerMint != UNLIMITED_AMOUNT) {\n            require(quantity \u003c= saleRound.maxAmountPerMint, \"Max mint amount exceeded\");\n        }\n\n        if (saleRound.totalAmount != UNLIMITED_AMOUNT) {\n            require(totalMintedAmountCurrentRound + quantity \u003c= saleRound.totalAmount, \"Max sale amount reached\");\n        }\n\n        if (saleRound.limitAmountPerWallet != UNLIMITED_AMOUNT) {\n            uint256 mintedAmountSoFar = _mintedAmountPerAddress[currentSaleIndex][recipient];\n            require(mintedAmountSoFar + quantity \u003c= saleRound.limitAmountPerWallet, \"Max minted per address reached\");\n        }\n\n        require(value \u003e= saleRound.price * quantity, \"Insufficient funds\");\n        _nftContract.mint(recipient, quantity);\n        totalMintedAmountCurrentRound += quantity;\n        // update total minted amount of this address\n        _mintedAmountPerAddress[currentSaleIndex][recipient] += quantity;\n        mintedAmountPerRound[currentSaleIndex] += quantity;\n    }\n}\n"},"Ownable.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)\n\npragma solidity ^0.8.0;\n\nimport \"./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"},"ReentrancyGuard.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Contract module that helps prevent reentrant calls to a function.\n *\n * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier\n * available, which can be applied to functions to make sure there are no nested\n * (reentrant) calls to them.\n *\n * Note that because there is a single `nonReentrant` guard, functions marked as\n * `nonReentrant` may not call one another. This can be worked around by making\n * those functions `private`, and then adding `external` `nonReentrant` entry\n * points to them.\n *\n * TIP: If you would like to learn more about reentrancy and alternative ways\n * to protect against it, check out our blog post\n * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].\n */\nabstract contract ReentrancyGuard {\n    // Booleans are more expensive than uint256 or any type that takes up a full\n    // word because each write operation emits an extra SLOAD to first read the\n    // slot\u0027s contents, replace the bits taken up by the boolean, and then write\n    // back. This is the compiler\u0027s 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\u0027s gas, it is best to keep them low in cases like this one, to\n    // increase the likelihood of the full refund coming into effect.\n    uint256 private constant _NOT_ENTERED = 1;\n    uint256 private constant _ENTERED = 2;\n\n    uint256 private _status;\n\n    constructor() {\n        _status = _NOT_ENTERED;\n    }\n\n    /**\n     * @dev Prevents a contract from calling itself, directly or indirectly.\n     * Calling a `nonReentrant` function from another `nonReentrant`\n     * function is not supported. It is possible to prevent this from happening\n     * by making the `nonReentrant` function external, and making it call a\n     * `private` function that does the actual work.\n     */\n    modifier nonReentrant() {\n        // On the first call to nonReentrant, _notEntered will be true\n        require(_status != _ENTERED, \"ReentrancyGuard: reentrant call\");\n\n        // Any calls to nonReentrant after this point will fail\n        _status = _ENTERED;\n\n        _;\n\n        // By storing the original value once again, a refund is triggered (see\n        // https://eips.ethereum.org/EIPS/eip-2200)\n        _status = _NOT_ENTERED;\n    }\n}\n"},"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\u0027s 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 \u003e\u003e= 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 \u003e 1; --i) {\n            buffer[i] = _HEX_SYMBOLS[value \u0026 0xf];\n            value \u003e\u003e= 4;\n        }\n        require(value == 0, \"Strings: hex length insufficient\");\n        return string(buffer);\n    }\n}\n"}}

{"AccessControl.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.5.0) (access/AccessControl.sol)\n\npragma solidity ^0.8.0;\n\nimport \"./IAccessControl.sol\";\nimport \"./Context.sol\";\nimport \"./Strings.sol\";\nimport \"./ERC165.sol\";\n\n/**\n * @dev Contract module that allows children to implement role-based access\n * control mechanisms. This is a lightweight version that doesn\u0027t allow enumerating role\n * members except through off-chain means by accessing the contract event logs. Some\n * applications may benefit from on-chain enumerability, for those cases see\n * {AccessControlEnumerable}.\n *\n * Roles are referred to by their `bytes32` identifier. These should be exposed\n * in the external API and be unique. The best way to achieve this is by\n * using `public constant` hash digests:\n *\n * ```\n * bytes32 public constant MY_ROLE = keccak256(\"MY_ROLE\");\n * ```\n *\n * Roles can be used to represent a set of permissions. To restrict access to a\n * function call, use {hasRole}:\n *\n * ```\n * function foo() public {\n *     require(hasRole(MY_ROLE, msg.sender));\n *     ...\n * }\n * ```\n *\n * Roles can be granted and revoked dynamically via the {grantRole} and\n * {revokeRole} functions. Each role has an associated admin role, and only\n * accounts that have a role\u0027s admin role can call {grantRole} and {revokeRole}.\n *\n * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means\n * that only accounts with this role will be able to grant or revoke other\n * roles. More complex role relationships can be created by using\n * {_setRoleAdmin}.\n *\n * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to\n * grant and revoke this role. Extra precautions should be taken to secure\n * accounts that have been granted it.\n */\nabstract contract AccessControl is Context, IAccessControl, ERC165 {\n    struct RoleData {\n        mapping(address =\u003e bool) members;\n        bytes32 adminRole;\n    }\n\n    mapping(bytes32 =\u003e RoleData) private _roles;\n\n    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;\n\n    /**\n     * @dev Modifier that checks that an account has a specific role. Reverts\n     * with a standardized message including the required role.\n     *\n     * The format of the revert reason is given by the following regular expression:\n     *\n     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/\n     *\n     * _Available since v4.1._\n     */\n    modifier onlyRole(bytes32 role) {\n        _checkRole(role, _msgSender());\n        _;\n    }\n\n    /**\n     * @dev See {IERC165-supportsInterface}.\n     */\n    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {\n        return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId);\n    }\n\n    /**\n     * @dev Returns `true` if `account` has been granted `role`.\n     */\n    function hasRole(bytes32 role, address account) public view virtual override returns (bool) {\n        return _roles[role].members[account];\n    }\n\n    /**\n     * @dev Revert with a standard message if `account` is missing `role`.\n     *\n     * The format of the revert reason is given by the following regular expression:\n     *\n     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/\n     */\n    function _checkRole(bytes32 role, address account) internal view virtual {\n        if (!hasRole(role, account)) {\n            revert(\n                string(\n                    abi.encodePacked(\n                        \"AccessControl: account \",\n                        Strings.toHexString(uint160(account), 20),\n                        \" is missing role \",\n                        Strings.toHexString(uint256(role), 32)\n                    )\n                )\n            );\n        }\n    }\n\n    /**\n     * @dev Returns the admin role that controls `role`. See {grantRole} and\n     * {revokeRole}.\n     *\n     * To change a role\u0027s admin, use {_setRoleAdmin}.\n     */\n    function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) {\n        return _roles[role].adminRole;\n    }\n\n    /**\n     * @dev Grants `role` to `account`.\n     *\n     * If `account` had not been already granted `role`, emits a {RoleGranted}\n     * event.\n     *\n     * Requirements:\n     *\n     * - the caller must have ``role``\u0027s admin role.\n     */\n    function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {\n        _grantRole(role, account);\n    }\n\n    /**\n     * @dev Revokes `role` from `account`.\n     *\n     * If `account` had been granted `role`, emits a {RoleRevoked} event.\n     *\n     * Requirements:\n     *\n     * - the caller must have ``role``\u0027s admin role.\n     */\n    function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {\n        _revokeRole(role, account);\n    }\n\n    /**\n     * @dev Revokes `role` from the calling account.\n     *\n     * Roles are often managed via {grantRole} and {revokeRole}: this function\u0027s\n     * purpose is to provide a mechanism for accounts to lose their privileges\n     * if they are compromised (such as when a trusted device is misplaced).\n     *\n     * If the calling account had been revoked `role`, emits a {RoleRevoked}\n     * event.\n     *\n     * Requirements:\n     *\n     * - the caller must be `account`.\n     */\n    function renounceRole(bytes32 role, address account) public virtual override {\n        require(account == _msgSender(), \"AccessControl: can only renounce roles for self\");\n\n        _revokeRole(role, account);\n    }\n\n    /**\n     * @dev Grants `role` to `account`.\n     *\n     * If `account` had not been already granted `role`, emits a {RoleGranted}\n     * event. Note that unlike {grantRole}, this function doesn\u0027t perform any\n     * checks on the calling account.\n     *\n     * [WARNING]\n     * ====\n     * This function should only be called from the constructor when setting\n     * up the initial roles for the system.\n     *\n     * Using this function in any other way is effectively circumventing the admin\n     * system imposed by {AccessControl}.\n     * ====\n     *\n     * NOTE: This function is deprecated in favor of {_grantRole}.\n     */\n    function _setupRole(bytes32 role, address account) internal virtual {\n        _grantRole(role, account);\n    }\n\n    /**\n     * @dev Sets `adminRole` as ``role``\u0027s admin role.\n     *\n     * Emits a {RoleAdminChanged} event.\n     */\n    function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {\n        bytes32 previousAdminRole = getRoleAdmin(role);\n        _roles[role].adminRole = adminRole;\n        emit RoleAdminChanged(role, previousAdminRole, adminRole);\n    }\n\n    /**\n     * @dev Grants `role` to `account`.\n     *\n     * Internal function without access restriction.\n     */\n    function _grantRole(bytes32 role, address account) internal virtual {\n        if (!hasRole(role, account)) {\n            _roles[role].members[account] = true;\n            emit RoleGranted(role, account, _msgSender());\n        }\n    }\n\n    /**\n     * @dev Revokes `role` from `account`.\n     *\n     * Internal function without access restriction.\n     */\n    function _revokeRole(bytes32 role, address account) internal virtual {\n        if (hasRole(role, account)) {\n            _roles[role].members[account] = false;\n            emit RoleRevoked(role, account, _msgSender());\n        }\n    }\n}\n"},"Address.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)\n\npragma solidity ^0.8.1;\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary Address {\n    /**\n     * @dev Returns true if `account` is a contract.\n     *\n     * [IMPORTANT]\n     * ====\n     * It is unsafe to assume that an address for which this function returns\n     * false is an externally-owned account (EOA) and not a contract.\n     *\n     * Among others, `isContract` will return false for the following\n     * types of addresses:\n     *\n     *  - an externally-owned account\n     *  - a contract in construction\n     *  - an address where a contract will be created\n     *  - an address where a contract lived, but was destroyed\n     * ====\n     *\n     * [IMPORTANT]\n     * ====\n     * You shouldn\u0027t 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 \u003e 0;\n    }\n\n    /**\n     * @dev Replacement for Solidity\u0027s `transfer`: sends `amount` wei to\n     * `recipient`, forwarding all available gas and reverting on errors.\n     *\n     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n     * of certain opcodes, possibly making contracts go over the 2300 gas limit\n     * imposed by `transfer`, making them unable to receive funds via\n     * `transfer`. {sendValue} removes this limitation.\n     *\n     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n     *\n     * IMPORTANT: because control is transferred to `recipient`, care must be\n     * taken to not create reentrancy vulnerabilities. Consider using\n     * {ReentrancyGuard} or the\n     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n     */\n    function sendValue(address payable recipient, uint256 amount) internal {\n        require(address(this).balance \u003e= amount, \"Address: insufficient balance\");\n\n        (bool success, ) = recipient.call{value: amount}(\"\");\n        require(success, \"Address: unable to send value, recipient may have reverted\");\n    }\n\n    /**\n     * @dev Performs a Solidity function call using a low level `call`. A\n     * plain `call` is an unsafe replacement for a function call: use this\n     * function instead.\n     *\n     * If `target` reverts with a revert reason, it is bubbled up by this\n     * function (like regular Solidity function calls).\n     *\n     * Returns the raw returned data. To convert to the expected return value,\n     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n     *\n     * Requirements:\n     *\n     * - `target` must be a contract.\n     * - calling `target` with `data` must not revert.\n     *\n     * _Available since v3.1._\n     */\n    function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n        return functionCall(target, data, \"Address: low-level call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n     * `errorMessage` as a fallback revert reason when `target` reverts.\n     *\n     * _Available since v3.1._\n     */\n    function functionCall(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) internal returns (bytes memory) {\n        return functionCallWithValue(target, data, 0, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but also transferring `value` wei to `target`.\n     *\n     * Requirements:\n     *\n     * - the calling contract must have an ETH balance of at least `value`.\n     * - the called Solidity function must be `payable`.\n     *\n     * _Available since v3.1._\n     */\n    function functionCallWithValue(\n        address target,\n        bytes memory data,\n        uint256 value\n    ) internal returns (bytes memory) {\n        return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n     * with `errorMessage` as a fallback revert reason when `target` reverts.\n     *\n     * _Available since v3.1._\n     */\n    function functionCallWithValue(\n        address target,\n        bytes memory data,\n        uint256 value,\n        string memory errorMessage\n    ) internal returns (bytes memory) {\n        require(address(this).balance \u003e= value, \"Address: insufficient balance for call\");\n        require(isContract(target), \"Address: call to non-contract\");\n\n        (bool success, bytes memory returndata) = target.call{value: value}(data);\n        return verifyCallResult(success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but performing a static call.\n     *\n     * _Available since v3.3._\n     */\n    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n        return functionStaticCall(target, data, \"Address: low-level static call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n     * but performing a static call.\n     *\n     * _Available since v3.3._\n     */\n    function functionStaticCall(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) internal view returns (bytes memory) {\n        require(isContract(target), \"Address: static call to non-contract\");\n\n        (bool success, bytes memory returndata) = target.staticcall(data);\n        return verifyCallResult(success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but performing a delegate call.\n     *\n     * _Available since v3.4._\n     */\n    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n        return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n     * but performing a delegate call.\n     *\n     * _Available since v3.4._\n     */\n    function functionDelegateCall(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) internal returns (bytes memory) {\n        require(isContract(target), \"Address: delegate call to non-contract\");\n\n        (bool success, bytes memory returndata) = target.delegatecall(data);\n        return verifyCallResult(success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Tool to verifies that a low level call was successful, and revert if it wasn\u0027t, either by bubbling the\n     * revert reason using the provided one.\n     *\n     * _Available since v4.3._\n     */\n    function verifyCallResult(\n        bool success,\n        bytes memory returndata,\n        string memory errorMessage\n    ) internal pure returns (bytes memory) {\n        if (success) {\n            return returndata;\n        } else {\n            // Look for revert reason and bubble it up if present\n            if (returndata.length \u003e 0) {\n                // The easiest way to bubble the revert reason is using memory via assembly\n\n                assembly {\n                    let returndata_size := mload(returndata)\n                    revert(add(32, returndata), returndata_size)\n                }\n            } else {\n                revert(errorMessage);\n            }\n        }\n    }\n}\n"},"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"},"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"},"ERC721A.sol":{"content":"// SPDX-License-Identifier: MIT\n// Creator: Chiru Labs\n\npragma solidity ^0.8.4;\n\nimport \u0027./IERC721.sol\u0027;\nimport \u0027./IERC721Receiver.sol\u0027;\nimport \u0027./IERC721Metadata.sol\u0027;\nimport \u0027./IERC721Enumerable.sol\u0027;\nimport \u0027./Address.sol\u0027;\nimport \u0027./Context.sol\u0027;\nimport \u0027./Strings.sol\u0027;\nimport \u0027./ERC165.sol\u0027;\n\n    error ApprovalCallerNotOwnerNorApproved();\n    error ApprovalQueryForNonexistentToken();\n    error ApproveToCaller();\n    error ApprovalToCurrentOwner();\n    error BalanceQueryForZeroAddress();\n    error MintedQueryForZeroAddress();\n    error BurnedQueryForZeroAddress();\n    error AuxQueryForZeroAddress();\n    error MintToZeroAddress();\n    error MintZeroQuantity();\n    error OwnerIndexOutOfBounds();\n    error OwnerQueryForNonexistentToken();\n    error TokenIndexOutOfBounds();\n    error TransferCallerNotOwnerNorApproved();\n    error TransferFromIncorrectOwner();\n    error TransferToNonERC721ReceiverImplementer();\n    error TransferToZeroAddress();\n    error URIQueryForNonexistentToken();\n\n/**\n * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including\n * the Metadata extension. Built to optimize for lower gas during batch mints.\n *\n * Assumes serials are sequentially minted starting at 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 Context, ERC165, IERC721, IERC721Metadata, IERC721Enumerable {\n    using Address for address;\n    using Strings for uint256;\n\n    // Compiler will pack this into a single 256bit word.\n    struct TokenOwnership {\n        // The address of the owner.\n        address addr;\n        // Keeps track of the start time of ownership with minimal overhead for tokenomics.\n        uint64 startTimestamp;\n        // Whether the token has been burned.\n        bool burned;\n    }\n\n    // Compiler will pack this into a single 256bit word.\n    struct AddressData {\n        // Realistically, 2**64-1 is more than enough.\n        uint64 balance;\n        // Keeps track of mint count with minimal overhead for tokenomics.\n        uint64 numberMinted;\n        // Keeps track of burn count with minimal overhead for tokenomics.\n        uint64 numberBurned;\n        // For miscellaneous variable(s) pertaining to the address\n        // (e.g. number of whitelist mint slots used).\n        // If there are multiple variables, please pack them into a uint64.\n        uint64 aux;\n    }\n\n    // The tokenId of the next token to be minted.\n    uint256 internal _currentIndex;\n\n    // The number of tokens burned.\n    uint256 internal _burnCounter;\n\n    // Token name\n    string private _name;\n\n    // Token symbol\n    string private _symbol;\n\n    // Mapping from token ID to ownership details\n    // An empty struct value does not necessarily mean the token is unowned. See ownershipOf implementation for details.\n    mapping(uint256 =\u003e TokenOwnership) internal _ownerships;\n\n    // Mapping owner address to address data\n    mapping(address =\u003e AddressData) private _addressData;\n\n    // Mapping from token ID to approved address\n    mapping(uint256 =\u003e address) private _tokenApprovals;\n\n    // Mapping from owner to operator approvals\n    mapping(address =\u003e mapping(address =\u003e bool)) private _operatorApprovals;\n\n    constructor(string memory name_, string memory symbol_) {\n        _name = name_;\n        _symbol = symbol_;\n    }\n\n    /**\n     * @dev See {IERC721Enumerable-totalSupply}.\n     */\n    function totalSupply() public view override returns (uint256) {\n        // Counter underflow is impossible as _burnCounter cannot be incremented\n        // more than _currentIndex times\n    unchecked {\n        return _currentIndex - _burnCounter;\n    }\n    }\n\n    /**\n     * @dev See {IERC165-supportsInterface}.\n     */\n    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {\n        return\n        interfaceId == type(IERC721).interfaceId ||\n        interfaceId == type(IERC721Metadata).interfaceId ||\n        interfaceId == type(IERC721Enumerable).interfaceId ||\n        super.supportsInterface(interfaceId);\n    }\n\n    /**\n     * @dev See {IERC721-balanceOf}.\n     */\n    function balanceOf(address owner) public view override returns (uint256) {\n        if (owner == address(0)) revert BalanceQueryForZeroAddress();\n        return uint256(_addressData[owner].balance);\n    }\n\n    /**\n     * Returns the number of tokens minted by `owner`.\n     */\n    function _numberMinted(address owner) internal view returns (uint256) {\n        if (owner == address(0)) revert MintedQueryForZeroAddress();\n        return uint256(_addressData[owner].numberMinted);\n    }\n\n    /**\n     * Returns the number of tokens burned by or on behalf of `owner`.\n     */\n    function _numberBurned(address owner) internal view returns (uint256) {\n        if (owner == address(0)) revert BurnedQueryForZeroAddress();\n        return uint256(_addressData[owner].numberBurned);\n    }\n\n    /**\n     * Returns the auxillary data for `owner`. (e.g. number of whitelist mint slots used).\n     */\n    function _getAux(address owner) internal view returns (uint64) {\n        if (owner == address(0)) revert AuxQueryForZeroAddress();\n        return _addressData[owner].aux;\n    }\n\n    /**\n     * Sets the auxillary data for `owner`. (e.g. number of whitelist mint slots used).\n     * If there are multiple variables, please pack them into a uint64.\n     */\n    function _setAux(address owner, uint64 aux) internal {\n        if (owner == address(0)) revert AuxQueryForZeroAddress();\n        _addressData[owner].aux = aux;\n    }\n\n    /**\n     * Gas spent here starts off proportional to the maximum mint batch size.\n     * It gradually moves to O(1) as tokens get transferred around in the collection over time.\n     */\n    function ownershipOf(uint256 tokenId) internal view returns (TokenOwnership memory) {\n        uint256 curr = tokenId;\n\n    unchecked {\n        if (curr \u003c _currentIndex) {\n            TokenOwnership memory ownership = _ownerships[curr];\n            if (!ownership.burned) {\n                if (ownership.addr != address(0)) {\n                    return ownership;\n                }\n                // Invariant:\n                // There will always be an ownership that has an address and is not burned\n                // before an ownership that does not have an address and is not burned.\n                // Hence, curr will not underflow.\n                while (true) {\n                    curr--;\n                    ownership = _ownerships[curr];\n                    if (ownership.addr != address(0)) {\n                        return ownership;\n                    }\n                }\n            }\n        }\n    }\n        revert OwnerQueryForNonexistentToken();\n    }\n\n    /**\n     * @dev See {IERC721-ownerOf}.\n     */\n    function ownerOf(uint256 tokenId) public view override returns (address) {\n        return ownershipOf(tokenId).addr;\n    }\n\n    /**\n     * @dev See {IERC721Metadata-name}.\n     */\n    function name() public view virtual override returns (string memory) {\n        return _name;\n    }\n\n    /**\n     * @dev See {IERC721Metadata-symbol}.\n     */\n    function symbol() public view virtual override returns (string memory) {\n        return _symbol;\n    }\n\n    /**\n     * @dev See {IERC721Metadata-tokenURI}.\n     */\n    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {\n        if (!_exists(tokenId)) revert URIQueryForNonexistentToken();\n\n        string memory baseURI = _baseURI();\n        return bytes(baseURI).length != 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : \u0027\u0027;\n    }\n\n    /**\n     * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each\n     * token will be the concatenation of the `baseURI` and the `tokenId`. Empty\n     * by default, can be overriden in child contracts.\n     */\n    function _baseURI() internal view virtual returns (string memory) {\n        return \u0027\u0027;\n    }\n\n    /**\n     * @dev See {IERC721-approve}.\n     */\n    function approve(address to, uint256 tokenId) public override {\n        address owner = ERC721A.ownerOf(tokenId);\n        if (to == owner) revert ApprovalToCurrentOwner();\n\n        if (_msgSender() != owner \u0026\u0026 !isApprovedForAll(owner, _msgSender())) {\n            revert ApprovalCallerNotOwnerNorApproved();\n        }\n\n        _approve(to, tokenId, owner);\n    }\n\n    /**\n     * @dev See {IERC721-getApproved}.\n     */\n    function getApproved(uint256 tokenId) public view override returns (address) {\n        if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken();\n\n        return _tokenApprovals[tokenId];\n    }\n\n    /**\n     * @dev See {IERC721-setApprovalForAll}.\n     */\n    function setApprovalForAll(address operator, bool approved) public override {\n        if (operator == _msgSender()) revert ApproveToCaller();\n\n        _operatorApprovals[_msgSender()][operator] = approved;\n        emit ApprovalForAll(_msgSender(), operator, approved);\n    }\n\n    /**\n     * @dev See {IERC721-isApprovedForAll}.\n     */\n    function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {\n        return _operatorApprovals[owner][operator];\n    }\n\n    /**\n     * @dev See {IERC721-transferFrom}.\n     */\n    function transferFrom(\n        address from,\n        address to,\n        uint256 tokenId\n    ) public virtual override {\n        _transfer(from, to, tokenId);\n    }\n\n    /**\n     * @dev See {IERC721-safeTransferFrom}.\n     */\n    function safeTransferFrom(\n        address from,\n        address to,\n        uint256 tokenId\n    ) public virtual override {\n        safeTransferFrom(from, to, tokenId, \u0027\u0027);\n    }\n\n    /**\n     * @dev See {IERC721-safeTransferFrom}.\n     */\n    function safeTransferFrom(\n        address from,\n        address to,\n        uint256 tokenId,\n        bytes memory _data\n    ) public virtual override {\n        _transfer(from, to, tokenId);\n        if (!_checkOnERC721Received(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 tokenId \u003c _currentIndex \u0026\u0026 !_ownerships[tokenId].burned;\n    }\n\n    function _safeMint(address to, uint256 quantity) internal {\n        _safeMint(to, quantity, \u0027\u0027);\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 {IERC721Receiver-onERC721Received}, which is called for each safe transfer.\n     * - `quantity` must be greater than 0.\n     *\n     * Emits a {Transfer} event.\n     */\n    function _safeMint(\n        address to,\n        uint256 quantity,\n        bytes memory _data\n    ) internal {\n        _mint(to, quantity, _data, true);\n    }\n\n    /**\n     * @dev Mints `quantity` tokens and transfers them to `to`.\n     *\n     * Requirements:\n     *\n     * - `to` cannot be the zero address.\n     * - `quantity` must be greater than 0.\n     *\n     * Emits a {Transfer} event.\n     */\n    function _mint(\n        address to,\n        uint256 quantity,\n        bytes memory _data,\n        bool safe\n    ) internal {\n        uint256 startTokenId = _currentIndex;\n        if (to == address(0)) revert MintToZeroAddress();\n        if (quantity == 0) revert MintZeroQuantity();\n\n        _beforeTokenTransfers(address(0), to, startTokenId, quantity);\n\n        // Overflows are incredibly unrealistic.\n        // balance or numberMinted overflow if current value of either + quantity \u003e 1.8e19 (2**64) - 1\n        // updatedIndex overflows if _currentIndex + quantity \u003e 1.2e77 (2**256) - 1\n    unchecked {\n        _addressData[to].balance += uint64(quantity);\n        _addressData[to].numberMinted += uint64(quantity);\n\n        _ownerships[startTokenId].addr = to;\n        _ownerships[startTokenId].startTimestamp = uint64(block.timestamp);\n\n        uint256 updatedIndex = startTokenId;\n\n        for (uint256 i; i \u003c quantity; i++) {\n            emit Transfer(address(0), to, updatedIndex);\n            if (safe \u0026\u0026 !_checkOnERC721Received(address(0), to, updatedIndex, _data)) {\n                revert TransferToNonERC721ReceiverImplementer();\n            }\n            updatedIndex++;\n        }\n\n        _currentIndex = updatedIndex;\n    }\n        _afterTokenTransfers(address(0), to, startTokenId, quantity);\n    }\n\n    /**\n     * @dev Transfers `tokenId` from `from` to `to`.\n     *\n     * Requirements:\n     *\n     * - `to` cannot be the zero address.\n     * - `tokenId` token must be owned by `from`.\n     *\n     * Emits a {Transfer} event.\n     */\n    function _transfer(\n        address from,\n        address to,\n        uint256 tokenId\n    ) private {\n        TokenOwnership memory prevOwnership = ownershipOf(tokenId);\n\n        bool isApprovedOrOwner = (_msgSender() == prevOwnership.addr ||\n        isApprovedForAll(prevOwnership.addr, _msgSender()) ||\n        getApproved(tokenId) == _msgSender());\n\n        if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();\n        if (prevOwnership.addr != from) revert TransferFromIncorrectOwner();\n        if (to == address(0)) revert TransferToZeroAddress();\n\n        _beforeTokenTransfers(from, to, tokenId, 1);\n\n        // Clear approvals from the previous owner\n        _approve(address(0), tokenId, prevOwnership.addr);\n\n        // Underflow of the sender\u0027s balance is impossible because we check for\n        // ownership above and the recipient\u0027s balance can\u0027t realistically overflow.\n        // Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.\n    unchecked {\n        _addressData[from].balance -= 1;\n        _addressData[to].balance += 1;\n\n        _ownerships[tokenId].addr = to;\n        _ownerships[tokenId].startTimestamp = uint64(block.timestamp);\n\n        // If the ownership slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it.\n        // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.\n        uint256 nextTokenId = tokenId + 1;\n        if (_ownerships[nextTokenId].addr == address(0)) {\n            // This will suffice for checking _exists(nextTokenId),\n            // as a burned slot cannot contain the zero address.\n            if (nextTokenId \u003c _currentIndex) {\n                _ownerships[nextTokenId].addr = prevOwnership.addr;\n                _ownerships[nextTokenId].startTimestamp = prevOwnership.startTimestamp;\n            }\n        }\n    }\n\n        emit Transfer(from, to, tokenId);\n        _afterTokenTransfers(from, to, tokenId, 1);\n    }\n\n    /**\n     * @dev Destroys `tokenId`.\n     * The approval is cleared when the token is burned.\n     *\n     * Requirements:\n     *\n     * - `tokenId` must exist.\n     *\n     * Emits a {Transfer} event.\n     */\n    function _burn(uint256 tokenId) internal virtual {\n        TokenOwnership memory prevOwnership = ownershipOf(tokenId);\n\n        _beforeTokenTransfers(prevOwnership.addr, address(0), tokenId, 1);\n\n        // Clear approvals from the previous owner\n        _approve(address(0), tokenId, prevOwnership.addr);\n\n        // Underflow of the sender\u0027s balance is impossible because we check for\n        // ownership above and the recipient\u0027s balance can\u0027t realistically overflow.\n        // Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.\n    unchecked {\n        _addressData[prevOwnership.addr].balance -= 1;\n        _addressData[prevOwnership.addr].numberBurned += 1;\n\n        // Keep track of who burned the token, and the timestamp of burning.\n        _ownerships[tokenId].addr = prevOwnership.addr;\n        _ownerships[tokenId].startTimestamp = uint64(block.timestamp);\n        _ownerships[tokenId].burned = true;\n\n        // If the ownership slot of tokenId+1 is not explicitly set, that means the burn initiator owns it.\n        // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.\n        uint256 nextTokenId = tokenId + 1;\n        if (_ownerships[nextTokenId].addr == address(0)) {\n            // This will suffice for checking _exists(nextTokenId),\n            // as a burned slot cannot contain the zero address.\n            if (nextTokenId \u003c _currentIndex) {\n                _ownerships[nextTokenId].addr = prevOwnership.addr;\n                _ownerships[nextTokenId].startTimestamp = prevOwnership.startTimestamp;\n            }\n        }\n    }\n\n        emit Transfer(prevOwnership.addr, address(0), tokenId);\n        _afterTokenTransfers(prevOwnership.addr, address(0), tokenId, 1);\n\n        // Overflow not possible, as _burnCounter cannot be exceed _currentIndex times.\n    unchecked {\n        _burnCounter++;\n    }\n    }\n\n    /**\n     * @dev Approve `to` to operate on `tokenId`\n     *\n     * Emits a {Approval} event.\n     */\n    function _approve(\n        address to,\n        uint256 tokenId,\n        address owner\n    ) private {\n        _tokenApprovals[tokenId] = to;\n        emit Approval(owner, to, tokenId);\n    }\n\n    /**\n     * @dev See {IERC721Enumerable-tokenByIndex}.\n     * This read function is O(totalSupply). If calling from a separate contract, be sure to test gas first.\n     * It may also degrade with extremely large collection sizes (e.g \u003e\u003e 10000), test for your use case.\n     */\n    function tokenByIndex(uint256 index) public view override returns (uint256) {\n        uint256 numMintedSoFar = _currentIndex;\n        uint256 tokenIdsIdx;\n\n        // Counter overflow is impossible as the loop breaks when\n        // uint256 i is equal to another uint256 numMintedSoFar.\n        unchecked {\n            for (uint256 i; i \u003c numMintedSoFar; i++) {\n                TokenOwnership memory ownership = _ownerships[i];\n                if (!ownership.burned) {\n                    if (tokenIdsIdx == index) {\n                        return i;\n                    }\n                    tokenIdsIdx++;\n                }\n            }\n        }\n        revert TokenIndexOutOfBounds();\n    }\n\n    /**\n     * @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.\n     * This read function is O(totalSupply). If calling from a separate contract, be sure to test gas first.\n     * It may also degrade with extremely large collection sizes (e.g \u003e\u003e 10000), test for your use case.\n     */\n    function tokenOfOwnerByIndex(address owner, uint256 index) public view override returns (uint256) {\n        if (index \u003e= balanceOf(owner)) revert OwnerIndexOutOfBounds();\n        uint256 numMintedSoFar = _currentIndex;\n        uint256 tokenIdsIdx;\n        address currOwnershipAddr;\n\n        // Counter overflow is impossible as the loop breaks when\n        // uint256 i is equal to another uint256 numMintedSoFar.\n        unchecked {\n            for (uint256 i; i \u003c numMintedSoFar; i++) {\n                TokenOwnership memory ownership = _ownerships[i];\n                if (ownership.burned) {\n                    continue;\n                }\n                if (ownership.addr != address(0)) {\n                    currOwnershipAddr = ownership.addr;\n                }\n                if (currOwnershipAddr == owner) {\n                    if (tokenIdsIdx == index) {\n                        return i;\n                    }\n                    tokenIdsIdx++;\n                }\n            }\n        }\n\n        // Execution should never reach this point.\n        revert();\n    }\n\n    /**\n     * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.\n     * The call is not executed if the target address is not a contract.\n     *\n     * @param from address representing the previous owner of the given token ID\n     * @param to target address that will receive the tokens\n     * @param tokenId uint256 ID of the token to be transferred\n     * @param _data bytes optional data to send along with the call\n     * @return bool whether the call correctly returned the expected magic value\n     */\n    function _checkOnERC721Received(\n        address from,\n        address to,\n        uint256 tokenId,\n        bytes memory _data\n    ) private returns (bool) {\n        if (to.isContract()) {\n            try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {\n                return retval == IERC721Receiver(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        } else {\n            return true;\n        }\n    }\n\n    /**\n     * @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting.\n     * And also called before burning one token.\n     *\n     * startTokenId - the first token id to be transferred\n     * quantity - the amount to be transferred\n     *\n     * Calling conditions:\n     *\n     * - When `from` and `to` are both non-zero, `from`\u0027s `tokenId` will be\n     * transferred to `to`.\n     * - When `from` is zero, `tokenId` will be minted for `to`.\n     * - When `to` is zero, `tokenId` will be burned by `from`.\n     * - `from` and `to` are never both zero.\n     */\n    function _beforeTokenTransfers(\n        address from,\n        address to,\n        uint256 startTokenId,\n        uint256 quantity\n    ) internal virtual {}\n\n    /**\n     * @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes\n     * minting.\n     * And also called after one token has been burned.\n     *\n     * startTokenId - the first token id to be transferred\n     * quantity - the amount to be transferred\n     *\n     * Calling conditions:\n     *\n     * - When `from` and `to` are both non-zero, `from`\u0027s `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"},"IAccessControl.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev External interface of AccessControl declared to support ERC165 detection.\n */\ninterface IAccessControl {\n    /**\n     * @dev Emitted when `newAdminRole` is set as ``role``\u0027s admin role, replacing `previousAdminRole`\n     *\n     * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite\n     * {RoleAdminChanged} not being emitted signaling this.\n     *\n     * _Available since v3.1._\n     */\n    event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);\n\n    /**\n     * @dev Emitted when `account` is granted `role`.\n     *\n     * `sender` is the account that originated the contract call, an admin role\n     * bearer except when using {AccessControl-_setupRole}.\n     */\n    event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);\n\n    /**\n     * @dev Emitted when `account` is revoked `role`.\n     *\n     * `sender` is the account that originated the contract call:\n     *   - if using `revokeRole`, it is the admin role bearer\n     *   - if using `renounceRole`, it is the role bearer (i.e. `account`)\n     */\n    event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);\n\n    /**\n     * @dev Returns `true` if `account` has been granted `role`.\n     */\n    function hasRole(bytes32 role, address account) external view returns (bool);\n\n    /**\n     * @dev Returns the admin role that controls `role`. See {grantRole} and\n     * {revokeRole}.\n     *\n     * To change a role\u0027s admin, use {AccessControl-_setRoleAdmin}.\n     */\n    function getRoleAdmin(bytes32 role) external view returns (bytes32);\n\n    /**\n     * @dev Grants `role` to `account`.\n     *\n     * If `account` had not been already granted `role`, emits a {RoleGranted}\n     * event.\n     *\n     * Requirements:\n     *\n     * - the caller must have ``role``\u0027s admin role.\n     */\n    function grantRole(bytes32 role, address account) external;\n\n    /**\n     * @dev Revokes `role` from `account`.\n     *\n     * If `account` had been granted `role`, emits a {RoleRevoked} event.\n     *\n     * Requirements:\n     *\n     * - the caller must have ``role``\u0027s admin role.\n     */\n    function revokeRole(bytes32 role, address account) external;\n\n    /**\n     * @dev Revokes `role` from the calling account.\n     *\n     * Roles are often managed via {grantRole} and {revokeRole}: this function\u0027s\n     * purpose is to provide a mechanism for accounts to lose their privileges\n     * if they are compromised (such as when a trusted device is misplaced).\n     *\n     * If the calling account had been granted `role`, emits a {RoleRevoked}\n     * event.\n     *\n     * Requirements:\n     *\n     * - the caller must be `account`.\n     */\n    function renounceRole(bytes32 role, address account) external;\n}\n"},"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"},"IERC721.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)\n\npragma solidity ^0.8.0;\n\nimport \"./IERC165.sol\";\n\n/**\n * @dev Required interface of an ERC721 compliant contract.\n */\ninterface IERC721 is IERC165 {\n    /**\n     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.\n     */\n    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);\n\n    /**\n     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.\n     */\n    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);\n\n    /**\n     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.\n     */\n    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);\n\n    /**\n     * @dev Returns the number of tokens in ``owner``\u0027s account.\n     */\n    function balanceOf(address owner) external view returns (uint256 balance);\n\n    /**\n     * @dev Returns the owner of the `tokenId` token.\n     *\n     * Requirements:\n     *\n     * - `tokenId` must exist.\n     */\n    function ownerOf(uint256 tokenId) external view returns (address owner);\n\n    /**\n     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients\n     * are aware of the ERC721 protocol to prevent tokens from being forever locked.\n     *\n     * Requirements:\n     *\n     * - `from` cannot be the zero address.\n     * - `to` cannot be the zero address.\n     * - `tokenId` token must exist and be owned by `from`.\n     * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.\n     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.\n     *\n     * Emits a {Transfer} event.\n     */\n    function safeTransferFrom(\n        address from,\n        address to,\n        uint256 tokenId\n    ) external;\n\n    /**\n     * @dev Transfers `tokenId` token from `from` to `to`.\n     *\n     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.\n     *\n     * Requirements:\n     *\n     * - `from` cannot be the zero address.\n     * - `to` cannot be the zero address.\n     * - `tokenId` token must be owned by `from`.\n     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.\n     *\n     * Emits a {Transfer} event.\n     */\n    function transferFrom(\n        address from,\n        address to,\n        uint256 tokenId\n    ) external;\n\n    /**\n     * @dev Gives permission to `to` to transfer `tokenId` token to another account.\n     * The approval is cleared when the token is transferred.\n     *\n     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.\n     *\n     * Requirements:\n     *\n     * - The caller must own the token or be an approved operator.\n     * - `tokenId` must exist.\n     *\n     * Emits an {Approval} event.\n     */\n    function approve(address to, uint256 tokenId) external;\n\n    /**\n     * @dev Returns the account approved for `tokenId` token.\n     *\n     * Requirements:\n     *\n     * - `tokenId` must exist.\n     */\n    function getApproved(uint256 tokenId) external view returns (address operator);\n\n    /**\n     * @dev Approve or remove `operator` as an operator for the caller.\n     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.\n     *\n     * Requirements:\n     *\n     * - The `operator` cannot be the caller.\n     *\n     * Emits an {ApprovalForAll} event.\n     */\n    function setApprovalForAll(address operator, bool _approved) external;\n\n    /**\n     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.\n     *\n     * See {setApprovalForAll}\n     */\n    function isApprovedForAll(address owner, address operator) external view returns (bool);\n\n    /**\n     * @dev Safely transfers `tokenId` token from `from` to `to`.\n     *\n     * Requirements:\n     *\n     * - `from` cannot be the zero address.\n     * - `to` cannot be the zero address.\n     * - `tokenId` token must exist and be owned by `from`.\n     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.\n     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.\n     *\n     * Emits a {Transfer} event.\n     */\n    function safeTransferFrom(\n        address from,\n        address to,\n        uint256 tokenId,\n        bytes calldata data\n    ) external;\n}\n"},"IERC721Enumerable.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol)\n\npragma solidity ^0.8.0;\n\nimport \"./IERC721.sol\";\n\n/**\n * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension\n * @dev See https://eips.ethereum.org/EIPS/eip-721\n */\ninterface IERC721Enumerable is IERC721 {\n    /**\n     * @dev Returns the total amount of tokens stored by the contract.\n     */\n    function totalSupply() external view returns (uint256);\n\n    /**\n     * @dev Returns a token ID owned by `owner` at a given `index` of its token list.\n     * Use along with {balanceOf} to enumerate all of ``owner``\u0027s tokens.\n     */\n    function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256);\n\n    /**\n     * @dev Returns a token ID at a given `index` of all the tokens stored by the contract.\n     * Use along with {totalSupply} to enumerate all tokens.\n     */\n    function tokenByIndex(uint256 index) external view returns (uint256);\n}\n"},"IERC721Metadata.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)\n\npragma solidity ^0.8.0;\n\nimport \"./IERC721.sol\";\n\n/**\n * @title ERC-721 Non-Fungible Token Standard, optional metadata extension\n * @dev See https://eips.ethereum.org/EIPS/eip-721\n */\ninterface IERC721Metadata is IERC721 {\n    /**\n     * @dev Returns the token collection name.\n     */\n    function name() external view returns (string memory);\n\n    /**\n     * @dev Returns the token collection symbol.\n     */\n    function symbol() external view returns (string memory);\n\n    /**\n     * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.\n     */\n    function tokenURI(uint256 tokenId) external view returns (string memory);\n}\n"},"IERC721Receiver.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @title ERC721 token receiver interface\n * @dev Interface for any contract that wants to support safeTransfers\n * from ERC721 asset contracts.\n */\ninterface IERC721Receiver {\n    /**\n     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}\n     * by `operator` from `from`, this function is called.\n     *\n     * It must return its Solidity selector to confirm the token transfer.\n     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.\n     *\n     * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.\n     */\n    function onERC721Received(\n        address operator,\n        address from,\n        uint256 tokenId,\n        bytes calldata data\n    ) external returns (bytes4);\n}\n"},"NFT.sol":{"content":"// SPDX-License-Identifier: UNLICENSED\npragma solidity 0.8.13;\n\nimport \"./ERC721A.sol\";\nimport \"./Reveal.sol\";\nimport \"./AccessControl.sol\";\nimport \"./Ownable.sol\";\n\n/**\n * @title The NFT smart contract.\n */\ncontract NFT is ERC721A, AccessControl, Ownable, Reveal {\n  /// @notice Minter Access Role - allows users and smart contracts with this role to mint standard tokens (not reserves).\n  bytes32 public constant MINTER_ROLE = keccak256(\"MINTER_ROLE\");\n  /// @notice The amount of available NFT tokens (including the reserved tokens).\n  uint256 public MAX_SUPPLY;\n  /// @notice The amount of reserved NFT tokens.\n  uint256 public MAX_RESERVED_SUPPLY;\n  /// @notice Indicates if the reserves have been minted.\n  bool public preminted = false;\n\n  /**\n     * @notice The smart contract constructor that initializes the contract.\n     * @param tokenName The name of the token.\n     * @param tokenSymbol The symbol of the token.\n     * @param unrevealedUri The URL of a media that is shown for unrevealed NFTs.\n     * @param maxSupply The total amount of available NFT tokens (including the reserved tokens).\n     * @param maxReservedSupply The amount of reserved NFT tokens.\n     */\n  constructor(\n    string memory tokenName,\n    string memory tokenSymbol,\n    string memory unrevealedUri,\n    uint256 maxSupply,\n    uint256 maxReservedSupply\n  )\n    ERC721A(tokenName, tokenSymbol)\n    Reveal(unrevealedUri) {\n    // Set the roles.\n    _grantRole(DEFAULT_ADMIN_ROLE, msg.sender);\n    _grantRole(MINTER_ROLE, msg.sender);\n    // Set the variables.\n    MAX_SUPPLY = maxSupply;\n    MAX_RESERVED_SUPPLY = maxReservedSupply;\n  }\n\n  /**\n   * @notice Sets the total amounts of tokens.\n   * @param quantity The number of tokens to set.\n   */\n  function setMaxSupply(uint256 quantity) external onlyRole(DEFAULT_ADMIN_ROLE) {\n    require(quantity \u003e 0, \"Quantity must be greater than 0\");\n    MAX_SUPPLY = quantity;\n  }\n\n  /**\n    * @notice Mints the reserved NFT tokens.\n    * @param recipient The NFT tokens recipient.\n    * @param quantity The number of NFT tokens to mint.\n    */\n  function premint(address recipient, uint256 quantity) external onlyRole(DEFAULT_ADMIN_ROLE) {\n    // Check if there are any reserved tokens available to mint.\n    require(preminted == false, \"Reserved tokens minted already\");\n    // Check if the desired quantity of the reserved tokens to mint doesn\u0027t exceed the reserve.\n    require(totalSupply() + quantity \u003c= MAX_RESERVED_SUPPLY, \"MAX_RESERVED_SUPPLY exceeded\");\n    // Mint the tokens.\n    _safeMint(recipient, quantity);\n    // Set the flag only if we have minted the whole reserve.\n    preminted = totalSupply() == MAX_RESERVED_SUPPLY;\n  }\n\n  /**\n   * @notice Grants the specified address the minter role.\n   * @param mintingRouter The address to grant the minter role.\n   */\n  function setMinter(address mintingRouter) external onlyRole(DEFAULT_ADMIN_ROLE) {\n    _setupRole(MINTER_ROLE, mintingRouter);\n  }\n\n  /**\n   * @notice Mints the NFT tokens.\n   * @param recipient The NFT tokens recipient.\n   * @param quantity The number of NFT tokens to mint.\n   */\n  function mint(address recipient, uint256 quantity) external onlyRole(MINTER_ROLE)   {\n    // Reserves should be minted before minting standard tokens.\n    require(preminted == true, \"TEAM_RESERVE_NOT_PREMINTED_YET\");\n    // Check that the number of tokens to mint does not exceed the total amount.\n    require(totalSupply() + quantity \u003c= MAX_SUPPLY, \"Exceeds max supply\");\n    // Mint the tokens.\n    _safeMint(recipient, quantity);\n  }\n\n  /**\n   * @notice Burns the NFT tokens.\n   * @param tokenIds The IDs of the NFTs to burn.\n   */\n  function burnTokens(uint256[] calldata tokenIds) external {\n    for (uint i = 0; i \u003c tokenIds.length; i++) {\n      TokenOwnership memory ownership = ownershipOf(tokenIds[i]);\n      if (ownership.addr != _msgSender() || ownership.burned) {\n        revert(\"Not owner or already burned\");\n      }\n\n      _burn(tokenIds[i]);\n    }\n  }\n\n  /**\n    * @notice Returns a URI of an NFT.\n    * @param tokenId The ID of the NFT.\n    * @return The URI of the token.\n    */\n  function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {\n    if (!_exists(tokenId)) revert URIQueryForNonexistentToken();\n\n    return getTokenUri(tokenId);\n  }\n\n  /**\n   * @notice Returns true if this contract implements the interface defined by interfaceId.\n   * @dev The following functions are overrides required by Solidity.\n   * @param interfaceId The interface ID.\n   */\n  function supportsInterface(bytes4 interfaceId) public view virtual override(ERC721A, AccessControl) returns (bool) {\n    return super.supportsInterface(interfaceId);\n  }\n\n  /**\n   * @notice Returns the base URL.\n   */\n  function _baseURI() internal view override returns (string memory) {\n     return getBaseUri();\n  }\n}\n"},"Ownable.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)\n\npragma solidity ^0.8.0;\n\nimport \"./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"},"Reveal.sol":{"content":"// SPDX-License-Identifier: UNLICENSED\npragma solidity 0.8.13;\n\nimport \"./Strings.sol\";\nimport \"./AccessControl.sol\";\n\n/// @title The NFT reveal contract.\ncontract Reveal is AccessControl {\n  using Strings for uint256;\n  // The base URI.\n  string private baseUri = \"ipfs://none\";\n  // The URI that used until NFTs are revealed.\n  string private unrevealedUri;\n  // The flag that indicates if NFTs have been revealed.\n  bool public revealed = false;\n\n  constructor(string memory _unrevealedUri) {\n    unrevealedUri = _unrevealedUri;\n  }\n\n  /// Reveals the NFTs.\n  function reveal() external onlyRole(DEFAULT_ADMIN_ROLE) {\n    revealed = true;\n  }\n\n  /// Unreveals the NFTs.\n  function unreveal() external onlyRole(DEFAULT_ADMIN_ROLE) {\n    revealed = false;\n  }\n\n  /// Sets base URI that is used when NFTs are revealed.\n  function setBaseUri(string memory uri) external onlyRole(DEFAULT_ADMIN_ROLE) {\n    baseUri = uri;\n    revealed = true;\n  }\n\n  /// Sets URI to be used while NFTs are unrevealed.\n  function setUnrevealedUri(string memory uri) external onlyRole(DEFAULT_ADMIN_ROLE) {\n    unrevealedUri = uri;\n  }\n\n  /// Gets the base URI.\n  function getBaseUri() public view returns (string memory) {\n    return baseUri;\n  }\n\n  /// Gets a token URI.\n  function getTokenUri(uint256 tokenId) internal view returns (string memory) {\n    if (!revealed) {\n      return unrevealedUri;\n    }\n\n    return bytes(baseUri).length != 0 ? string(abi.encodePacked(baseUri, tokenId.toString())) : \"\";\n  }\n}"},"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\u0027s 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 \u003e\u003e= 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 \u003e 1; --i) {\n            buffer[i] = _HEX_SYMBOLS[value \u0026 0xf];\n            value \u003e\u003e= 4;\n        }\n        require(value == 0, \"Strings: hex length insufficient\");\n        return string(buffer);\n    }\n}\n"}}