{
  "language": "Solidity",
  "sources": {
    "contracts/LendingNFT.sol": {
      "content": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.4;\n\nimport \"@openzeppelin/contracts/token/ERC721/utils/ERC721Holder.sol\";\nimport \"@openzeppelin/contracts/token/ERC721/IERC721.sol\";\nimport \"@openzeppelin/contracts/security/ReentrancyGuard.sol\";\nimport \"@openzeppelin/contracts/security/Pausable.sol\";\nimport \"@openzeppelin/contracts/utils/Counters.sol\";\nimport \"@openzeppelin/contracts/utils/Address.sol\";\nimport \"@openzeppelin/contracts/access/AccessControl.sol\";\nimport \"@openzeppelin/contracts/utils/cryptography/ECDSA.sol\";\nimport \"./interfaces/ILendingNFT.sol\";\nimport \"./interfaces/IERC4907.sol\";\nimport \"./common/TransferHelper.sol\";\nimport \"./LendingStorage.sol\";\n\ncontract LendingNFT is AccessControl, ILendingNFT, ReentrancyGuard, Pausable, ERC721Holder\n{\n  using ECDSA for bytes32;\n  using Address for address;\n\n  bytes32 private constant OPERATOR = keccak256(\"OPERATOR\");\n\n  uint32 public constant timeADay = 1 days;\n  LendingStorage private _storageAddress;\n\n  event ORDERCREATE(address lender, address borrower, uint8 status, uint256 orderId, uint8 nftType, uint256 nftId, uint64 rentalDuration, uint256 dailyRentalPrice, uint256 timeStamp);\n  event ORDERCANCEL(address canceler, uint8 status, uint256 orderId, uint8 nftType, uint256 nftId, uint256 timeStamp);\n  event LENDINGPAYMENT(address borrower, uint8 status, uint256 orderId, uint8 nftType, uint256 nftId, uint256 receivedPrice, uint256 commissionPrice, uint256 expiredTime, uint256 timeStamp);\n  event CLAIMPRICE(address lender, uint8 status, uint256 orderId, uint8 nftType, uint256 nftId, uint256 receivedPrice, uint256 timeStamp);\n  event CLAIMNFT(address lender, uint8 status, uint256 orderId, uint8 nftType, uint256 nftId, uint256 timeStamp);\n\n  constructor(address _storage) {\n    _storageAddress = LendingStorage(_storage);\n    _setupRole(DEFAULT_ADMIN_ROLE, msg.sender);\n  }\n\n  modifier onlyAdmin() {\n    require(hasRole(DEFAULT_ADMIN_ROLE, msg.sender), \"Restricted to admin.\");\n    _;\n  }\n\n  modifier onlyOperator() {\n    require(hasRole(OPERATOR, msg.sender), \"Restricted to OPERATOR.\");\n    _;\n  }\n\n  function setOperator(address _operator) external onlyAdmin {\n    _setupRole(OPERATOR, _operator);\n  }\n\n  function setCommissionPercent(uint32 _value) external onlyAdmin {\n    LendingStorage.StorageInfor memory info = _storageAddress.getInfor();\n    require(_value > 0 && _value < info.percentDecimals, \"VALUE_INVALID\");\n    _storageAddress.setCommissionVal(_value);\n  }\n\n  function getCommissionPercent() external view returns(uint32) {\n    return _storageAddress.getCommistionVal();\n  }\n\n  function setPause(bool _isPause) external onlyOperator {\n    require(paused() != _isPause, \"PAUSEABLE_IS_NOT_CHANGE\");\n    if (_isPause) {\n      _pause();\n    } else {\n      _unpause();\n    }\n  }\n\n  function orderNFT(\n    address _borrower,\n    uint8 _nftType,\n    uint256 _nftId,\n    uint64 _rentalDuration,\n    uint256 _dailyRentalPrice\n  ) external override\n    nonReentrant whenNotPaused {\n    LendingStorage.StorageInfor memory info = _storageAddress.getInfor();\n    require(_borrower != address(0), \"ADDRESS_INVALID\");\n    require(_nftType >= 0 && _nftType < info.countNFTContract, \"NFT_TYPE_INVALID\");\n    require(_rentalDuration > 0, \"RENTAL_DURATION_INVALID\");\n    require(_dailyRentalPrice > 0, \"DAILY_RENTAL_PRICE_INVALID\");\n    require(_nftId > 0, \"NFTID_INVALID\");\n    IERC721 nft = IERC721(_storageAddress.getNFTContractAddress(_nftType));\n    require(nft.ownerOf(_nftId) == msg.sender, \"YOU_MUST_OWNER_OF_TOKEN\");\n    address lender = _msgSender();\n    uint256 orderId = _storageAddress.createItemOrder(_nftId, _nftType, _dailyRentalPrice, _rentalDuration, lender, _borrower);\n    nft.safeTransferFrom(lender, address(this), _nftId, \"\");\n    emit ORDERCREATE(lender, _borrower, uint8(LendingStorage.OrderStatus.WaitPayment), orderId, _nftType, _nftId, _rentalDuration, _dailyRentalPrice, block.timestamp);\n  }\n\n  function cancelOrderItem(\n    uint256 _nftId,\n    uint8 _nftType\n  ) external override\n    nonReentrant whenNotPaused {\n    LendingStorage.StorageInfor memory info = _storageAddress.getInfor();\n    require(_nftId > 0, \"NFT_INVALID\");\n    require(_nftType >= 0 && _nftType < info.countNFTContract, \"NFT_TYPE_INVALID\");\n    LendingStorage.OrderERC4907 memory orderItem = _storageAddress.getOrder(_nftId, _nftType);\n    require(msg.sender == orderItem.lender || msg.sender == orderItem.borrower , \"UNAUTHORIZED\");\n    require(orderItem.status == uint8(LendingStorage.OrderStatus.WaitPayment), \"METHOD_NOT_ALLOWED\");\n    _storageAddress.deleteSellOrder(_nftId, _nftType);\n    IERC721 nft = IERC721(_storageAddress.getNFTContractAddress(_nftType));\n    nft.safeTransferFrom(address(this), orderItem.lender, _nftId, \"\");\n    emit ORDERCANCEL(msg.sender, uint8(LendingStorage.OrderStatus.Cancel), orderItem.id, _nftType, _nftId, block.timestamp);\n  }\n\n  function paymentOrder(\n    uint256 _nftId,\n    uint8 _nftType,\n    uint256 _startTime,\n    string memory _orderUUid,\n    bytes memory _signature\n  ) external override\n    nonReentrant whenNotPaused {\n    LendingStorage.StorageInfor memory info = _storageAddress.getInfor();\n    require(_nftId > 0, \"NFT_INVALID\");\n    require(_nftType >= 0 && _nftType < info.countNFTContract, \"NFT_TYPE_INVALID\");\n    require(_startTime > 0 && _startTime < block.timestamp + info.maxWaitingTime, \"STARTTIME_ERROR\");\n    address borrower = _msgSender();\n    require(_storageAddress.isExecutedOrder(_orderUUid) == false, \"ORDER_IS_EXECUTED\");\n    _storageAddress.setExecutedOrder(_orderUUid, true);\n    LendingStorage.OrderERC4907 memory orderItem = _storageAddress.getOrder(_nftId, _nftType);\n    require(verifySignature(_nftId, _nftType, _signature, _orderUUid, info.adminVerify, orderItem.lender, msg.sender), \"SIGNATURE_INVALID\");\n    require(orderItem.borrower == borrower, \"UNAUTHORIZED\");\n    require(orderItem.status == uint8(LendingStorage.OrderStatus.WaitPayment), \"ORDER_STATUS_NOT_ACTION\");\n    uint8 nftType = _nftType;\n    uint256 expiredTime = block.timestamp + orderItem.rentalDuration * timeADay;\n    uint256 nftId = _nftId;\n    IERC4907 nft = IERC4907(_storageAddress.getNFTContractAddress(nftType));\n    nft.setUser(nftId, borrower, uint64(expiredTime));\n    uint8 statusPaid = uint8(LendingStorage.OrderStatus.Paid);\n    _storageAddress.updateOrderItem(nftId, nftType, statusPaid, expiredTime);\n    uint256 rentalPrice = orderItem.dailyRentalPrice * orderItem.rentalDuration;\n    uint256 commissionPrice = (rentalPrice * orderItem.commissionPercent) / orderItem.percentDecimals;\n    uint256 receivedPrice = rentalPrice - commissionPrice;\n    _payment(address(this), info.commissionWallet, info.currencyToken, borrower, receivedPrice, commissionPrice);\n    emit LENDINGPAYMENT(borrower, statusPaid, orderItem.id, nftType, nftId, receivedPrice, commissionPrice, expiredTime, block.timestamp);\n  }\n\n  function lenderRewardClaim(\n    uint256 _nftId,\n    uint8 _nftType,\n    string memory _orderUUid,\n    bytes memory _signature\n  ) external override\n    nonReentrant whenNotPaused {\n    LendingStorage.StorageInfor memory info = _storageAddress.getInfor();\n    require(_nftId > 0, \"NFT_INVALID\");\n    require(_nftType >= 0 && _nftType < info.countNFTContract, \"NFT_TYPE_INVALID\");\n    require(_storageAddress.isExecutedOrder(_orderUUid) == false, \"ORDER_IS_EXECUTED\");\n    _storageAddress.setExecutedOrder(_orderUUid, true);\n    LendingStorage.OrderERC4907 memory orderItem = _storageAddress.getOrder(_nftId, _nftType);\n    require(verifySignature(_nftId, _nftType, _signature, _orderUUid, info.adminVerify, msg.sender, orderItem.borrower), \"SIGNATURE_INVALID\");\n    require(orderItem.lender == msg.sender, \"UNAUTHORIZED\");\n    uint8 statusPaid = uint8(LendingStorage.OrderStatus.Paid);\n    uint8 statusClaimPrice = uint8(LendingStorage.OrderStatus.IsClaimPrice);\n    uint8 statusExpired = uint8(LendingStorage.OrderStatus.Expired);\n    require(orderItem.status == statusPaid || orderItem.status == statusExpired, \"METHOD_NOT_ALLOWED\");\n    _storageAddress.updateOrderItem(_nftId, _nftType, statusClaimPrice, 0);\n    uint256 rentalPrice = orderItem.dailyRentalPrice * orderItem.rentalDuration;\n    uint256 receivedPrice = (rentalPrice * (orderItem.percentDecimals - orderItem.commissionPercent)) / orderItem.percentDecimals;\n    TransferHelper.contractTransfer(info.currencyToken, msg.sender, receivedPrice);\n    emit CLAIMPRICE(msg.sender, statusClaimPrice, orderItem.id, _nftType, _nftId, receivedPrice, block.timestamp);\n  }\n\n  function lenderClaimNFT(\n    uint256 _nftId,\n    uint8 _nftType,\n    string memory _orderUUid,\n    bytes memory _signature\n  ) external override\n    nonReentrant whenNotPaused {\n    LendingStorage.StorageInfor memory info = _storageAddress.getInfor();\n    require(_nftId > 0, \"NFT_INVALID\");\n    require(_nftType >= 0 && _nftType < info.countNFTContract, \"NFT_TYPE_INVALID\");\n    require(_storageAddress.isExecutedOrder(_orderUUid) == false, \"ORDER_IS_EXECUTED\");\n    _storageAddress.setExecutedOrder(_orderUUid, true);\n    LendingStorage.OrderERC4907 memory orderItem = _storageAddress.getOrder(_nftId, _nftType);\n    require(verifySignature(_nftId, _nftType, _signature, _orderUUid, info.adminVerify, msg.sender, orderItem.borrower), \"SIGNATURE_INVALID\");\n    require(orderItem.lender == msg.sender, \"UNAUTHORIZED\");\n    require(orderItem.status == uint8(LendingStorage.OrderStatus.IsClaimPrice) && orderItem.expiredTime < block.timestamp, \"METHOD_NOT_ALLOWED\");\n    _storageAddress.deleteSellOrder(_nftId, _nftType);\n    IERC721 nft = IERC721(_storageAddress.getNFTContractAddress(_nftType));\n    nft.safeTransferFrom(address(this), msg.sender, _nftId, \"\");\n    emit CLAIMNFT(msg.sender, uint8(LendingStorage.OrderStatus.IsClaimNFT), orderItem.id, _nftType, _nftId, block.timestamp);\n  }\n\n  function _payment(\n    address transactionWallet,\n    address commisionWallet,\n    address currencyExchange,\n    address sender,\n    uint256 receivedPrice,\n    uint256 commissionPrice\n  ) private {\n    TransferHelper.safeTransferFrom(currencyExchange, sender, transactionWallet, receivedPrice);\n    TransferHelper.safeTransferFrom(currencyExchange, sender, commisionWallet, commissionPrice);\n  }\n\n  function verifySignature(\n    uint256 nftId,\n    uint256 nftType,\n    bytes memory signature,\n    string memory orderUUid,\n    address verifier,\n    address lender,\n    address borrower\n  ) private pure returns (bool) {\n    bytes32 hashValue = keccak256(abi.encodePacked(nftId, nftType, orderUUid, lender, borrower));\n    address recover = hashValue.toEthSignedMessageHash().recover(signature);\n    return recover == verifier;\n  }\n}"
    },
    "contracts/LendingStorage.sol": {
      "content": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.4;\n\nimport \"@openzeppelin/contracts/access/AccessControl.sol\";\nimport \"@openzeppelin/contracts/utils/Address.sol\";\nimport \"@openzeppelin/contracts/utils/Counters.sol\";\nimport \"@openzeppelin/contracts/security/ReentrancyGuard.sol\";\nimport \"@openzeppelin/contracts/security/Pausable.sol\";\nimport \"@openzeppelin/contracts/utils/cryptography/ECDSA.sol\";\n\ncontract LendingStorage is AccessControl, ReentrancyGuard, Pausable {\n  using ECDSA for bytes32;\n  using Address for address;\n  using Counters for Counters.Counter;\n\n  enum OrderStatus {\n    default_zero,\n    WaitPayment,\n    Paid,\n    IsClaimPrice,\n    Expired,\n    Cancel,\n    IsClaimNFT\n  }\n\n  struct OrderERC4907 {\n    uint256 id;\n    address lender;\n    address borrower;\n    uint8 status;\n    uint64 rentalDuration;\n    uint256 dailyRentalPrice;\n    uint256 startTime;\n    uint256 expiredTime;\n    uint32 commissionPercent;\n    uint32 percentDecimals;\n  }\n\n  struct StorageInfor {\n    uint256 countNFTContract;\n    uint32 maxWaitingTime;\n    uint32 percentDecimals;\n    address adminVerify;\n    address commissionWallet;\n    address currencyToken;\n  }\n\n  bytes32 private constant OPERATOR = keccak256(\"OPERATOR\");\n  bytes32 private constant MARKET = keccak256(\"MARKET\");\n  address private _transactionWallet;\n  address private _commissionWallet;\n  address private _verifier;\n  address private _currencyToken;\n  uint32 private _commissionPercent;\n\n  mapping(uint256 => Counters.Counter) private _orderIds;\n  mapping(uint256 => mapping(uint256 => OrderERC4907)) private orders;\n  mapping(string => bool) private _orderUUids;\n  address[] private _contractAddresses;\n  uint32 private _percentDecimals;\n  uint32 private _maxWaitingTime;\n\n  constructor() {\n    _setupRole(DEFAULT_ADMIN_ROLE, msg.sender);\n  }\n\n  modifier onlyAdmin() {\n    require(hasRole(DEFAULT_ADMIN_ROLE, msg.sender), \"Restricted to admin.\");\n    _;\n  }\n\n  modifier onlyOperator() {\n    require(hasRole(OPERATOR, msg.sender), \"Restricted to OPERATOR.\");\n    _;\n  }\n\n  function setPause(bool _isPause) external onlyOperator {\n    require(paused() != _isPause, \"PAUSEABLE_IS_NOT_CHANGE\");\n    if (_isPause) {\n      _pause();\n    } else {\n      _unpause();\n    }\n  }\n\n  modifier onlyMarket() {\n    require(hasRole(MARKET, msg.sender), \"Restricted to market.\");\n    _;\n  }\n\n  function setOperator(address _operator) external onlyAdmin {\n    _setupRole(OPERATOR, _operator);\n  }\n\n  function setMarket(address _market) external onlyOperator {\n    _setupRole(MARKET, _market);\n  }\n\n  function setMaxWaitingTime(uint32 _minutes) external onlyOperator {\n    require(_minutes > 0 && _minutes <= 60, \"VALUE_INVALID\");\n    _maxWaitingTime = _minutes * 60;\n  }\n\n  function setPercentDecimals(uint32 _decimals) external onlyOperator {\n    require(_decimals > 0 && _decimals <= 10000, \"VALUE_INVALID\");\n    _percentDecimals = _decimals * 100; // decimal * 100%\n  }\n\n  function setCommissionWallet(address _address) external onlyOperator {\n    require(_address != address(0), \"ADDRESS_CAN_NOT_IS_ZERO\");\n    _commissionWallet = _address;\n  }\n\n  function setCurrencyToken(address _token) external onlyOperator {\n    require(_token != address(0), \"ADDRESS_CAN_NOT_IS_ZERO\");\n    _currencyToken = _token;\n  }\n\n  function setCommissionVal(uint32 _value) external onlyMarket {\n    _commissionPercent = _value;\n  }\n\n  function getCommistionVal() external onlyMarket view returns(uint32) {\n    return _commissionPercent;\n  }\n\n  function setAddressVerify(address _address) external onlyOperator {\n    require(_address != address(0), \"ADDRESS_CAN_NOT_IS_ZERO\");\n    _verifier = _address;\n  }\n\n  function addNFTContractAddress(address[] memory _nftContractAddresses) external onlyOperator {\n    for(uint256 i = 0; i < _nftContractAddresses.length; i++) {\n      _contractAddresses.push(_nftContractAddresses[i]);\n    }\n  }\n\n  function reloadNFTContractAddress(address[] memory _nftContractAddresses) external onlyOperator {\n    require(_nftContractAddresses.length > 0, \"INVALD_WALLET\");\n    require(_contractAddresses.length >= _nftContractAddresses.length, \"INVALID_PARAMS\");\n    for(uint256 i = 0; i < _nftContractAddresses.length; i++) {\n      _contractAddresses[i] = _nftContractAddresses[i];\n    }\n  }\n\n  function createItemOrder(\n    uint256 _nftId,\n    uint8 _nftType,\n    uint256 _dailyRentalPrice,\n    uint64 _rentalDuration,\n    address _lender,\n    address _borrower\n  ) external onlyMarket nonReentrant whenNotPaused returns (uint256) {\n    OrderERC4907 memory existedOrder = orders[_nftId][_nftType];\n    require(existedOrder.id == 0, \"Sell order is already existed\");\n    _orderIds[_nftType].increment();\n    uint256 orderId = _orderIds[_nftType].current();\n    orders[_nftId][_nftType] = OrderERC4907({\n      id: orderId,\n      lender: _lender,\n      borrower: _borrower,\n      status: uint8(OrderStatus.WaitPayment),\n      rentalDuration: _rentalDuration,\n      dailyRentalPrice: _dailyRentalPrice,\n      startTime: 0,\n      expiredTime: 0,\n      commissionPercent: _commissionPercent,\n      percentDecimals: _percentDecimals\n    });\n    return orderId;\n  }\n\n  function getOrder(uint256 _nftId, uint256 _nftType) external onlyMarket view returns (OrderERC4907 memory) {\n    return orders[_nftId][_nftType];\n  }\n\n  function updateOrderItem(\n    uint256 _nftId,\n    uint8 _nftType,\n    uint8 _newStatus,\n    uint256 _expiredTime\n  ) external onlyMarket {\n    if (_newStatus != uint8(OrderStatus.default_zero)) {\n      orders[_nftId][_nftType].status = _newStatus;\n    }\n    if (_expiredTime != 0) {\n      orders[_nftId][_nftType].startTime = block.timestamp;\n      orders[_nftId][_nftType].expiredTime = _expiredTime;\n    }\n  }\n\n  function deleteSellOrder(\n    uint256 _nftId,\n    uint8 _nftType\n  ) external onlyMarket {\n    orders[_nftId][_nftType].id = 0;\n    delete orders[_nftId][_nftType];\n  }\n\n  function getNFTContractAddress(uint256 _nftType) external onlyMarket view returns(address) {\n    return _contractAddresses[_nftType];\n  }\n\n  function isExecutedOrder(string memory _orderUUid) external onlyMarket view returns(bool) {\n    return _orderUUids[_orderUUid];\n  }\n\n  function setExecutedOrder(string memory _orderUUid, bool _status) external onlyMarket {\n    _orderUUids[_orderUUid] = _status;\n  }\n\n  function getInfor() onlyMarket external view returns (StorageInfor memory) {\n    StorageInfor memory info = StorageInfor({\n      countNFTContract: _contractAddresses.length,\n      maxWaitingTime: _maxWaitingTime,\n      percentDecimals: _percentDecimals,\n      adminVerify: _verifier,\n      commissionWallet: _commissionWallet,\n      currencyToken: _currencyToken\n    });\n    return info;\n  }\n}"
    },
    "contracts/interfaces/ILendingNFT.sol": {
      "content": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.4;\n\ninterface ILendingNFT\n{\n  function orderNFT(\n    address _borrower,\n    uint8 _nftType,\n    uint256 _nftId,\n    uint64 _rentalDuration,\n    uint256 _dailyRentalPrice\n  ) external;\n\n  function cancelOrderItem(\n    uint256 _nftId,\n    uint8 _nftType\n  ) external;\n\n  function paymentOrder(\n    uint256 _nftId,\n    uint8 _nftType,\n    uint256 _startTime,\n    string memory _orderUUid,\n    bytes memory _signature\n  ) external;\n\n  function lenderRewardClaim(\n    uint256 _nftId,\n    uint8 _nftType,\n    string memory _orderUUid,\n    bytes memory _signature\n  ) external;\n\n  function lenderClaimNFT(\n    uint256 _nftId,\n    uint8 _nftType,\n    string memory _orderUUid,\n    bytes memory _signature\n  ) external;\n}"
    },
    "contracts/interfaces/IERC4907.sol": {
      "content": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.7;\n\ninterface IERC4907 {\n\n    // Logged when the user of an NFT is changed or expires is changed\n    /// @notice Emitted when the `user` of an NFT or the `expires` of the `user` is changed\n    /// The zero address for user indicates that there is no user address\n    event UpdateUser(uint256 indexed tokenId, address indexed user, uint64 expires);\n\n    /// @notice set the user and expires of an NFT\n    /// @dev The zero address indicates there is no user\n    /// Throws if `tokenId` is not valid NFT\n    /// @param user  The new user of the NFT\n    /// @param expires  UNIX timestamp, The new user could use the NFT before expires\n    function setUser(uint256 tokenId, address user, uint64 expires) external;\n\n    /// @notice Get the user address of an NFT\n    /// @dev The zero address indicates that there is no user or the user is expired\n    /// @param tokenId The NFT to get the user address for\n    /// @return The user address for this NFT\n    function userOf(uint256 tokenId) external view returns(address);\n\n    /// @notice Get the user expires of an NFT\n    /// @dev The zero value indicates that there is no user\n    /// @param tokenId The NFT to get the user expires for\n    /// @return The user expires for this NFT\n    function userExpires(uint256 tokenId) external view returns(uint256);\n}\n"
    },
    "contracts/common/TransferHelper.sol": {
      "content": "//SPDX-License-Identifier: MIT\npragma solidity ^0.8.4;\n\nlibrary TransferHelper {\n    function safeTransferFrom(\n        address token,\n        address from,\n        address to,\n        uint256 value\n    ) internal {\n        // bytes4(keccak256(bytes('transferFrom(address,address,uint256)')));\n        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value));\n        require(\n            success && (data.length == 0 || abi.decode(data, (bool))),\n            'TransferHelper::transferFrom: transferFrom failed'\n        );\n    }\n\n    function contractTransfer(\n        address token,\n        address to,\n        uint256 value\n    ) internal {\n        // bytes4(keccak256(bytes('transfer(address,uint256)')));\n        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value));\n        require(\n            success && (data.length == 0 || abi.decode(data, (bool))),\n            'TransferHelper::transferFrom: transferFrom failed'\n        );\n    }\n}\n"
    },
    "@openzeppelin/contracts/security/ReentrancyGuard.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Contract module that helps prevent reentrant calls to a function.\n *\n * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier\n * available, which can be applied to functions to make sure there are no nested\n * (reentrant) calls to them.\n *\n * Note that because there is a single `nonReentrant` guard, functions marked as\n * `nonReentrant` may not call one another. This can be worked around by making\n * those functions `private`, and then adding `external` `nonReentrant` entry\n * points to them.\n *\n * TIP: If you would like to learn more about reentrancy and alternative ways\n * to protect against it, check out our blog post\n * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].\n */\nabstract contract ReentrancyGuard {\n    // Booleans are more expensive than uint256 or any type that takes up a full\n    // word because each write operation emits an extra SLOAD to first read the\n    // slot's contents, replace the bits taken up by the boolean, and then write\n    // back. This is the compiler's defense against contract upgrades and\n    // pointer aliasing, and it cannot be disabled.\n\n    // The values being non-zero value makes deployment a bit more expensive,\n    // but in exchange the refund on every call to nonReentrant will be lower in\n    // amount. Since refunds are capped to a percentage of the total\n    // transaction's gas, it is best to keep them low in cases like this one, to\n    // increase the likelihood of the full refund coming into effect.\n    uint256 private constant _NOT_ENTERED = 1;\n    uint256 private constant _ENTERED = 2;\n\n    uint256 private _status;\n\n    constructor() {\n        _status = _NOT_ENTERED;\n    }\n\n    /**\n     * @dev Prevents a contract from calling itself, directly or indirectly.\n     * Calling a `nonReentrant` function from another `nonReentrant`\n     * function is not supported. It is possible to prevent this from happening\n     * by making the `nonReentrant` function external, and making it call a\n     * `private` function that does the actual work.\n     */\n    modifier nonReentrant() {\n        // On the first call to nonReentrant, _notEntered will be true\n        require(_status != _ENTERED, \"ReentrancyGuard: reentrant call\");\n\n        // Any calls to nonReentrant after this point will fail\n        _status = _ENTERED;\n\n        _;\n\n        // By storing the original value once again, a refund is triggered (see\n        // https://eips.ethereum.org/EIPS/eip-2200)\n        _status = _NOT_ENTERED;\n    }\n}\n"
    },
    "@openzeppelin/contracts/security/Pausable.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (security/Pausable.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../utils/Context.sol\";\n\n/**\n * @dev Contract module which allows children to implement an emergency stop\n * mechanism that can be triggered by an authorized account.\n *\n * This module is used through inheritance. It will make available the\n * modifiers `whenNotPaused` and `whenPaused`, which can be applied to\n * the functions of your contract. Note that they will not be pausable by\n * simply including this module, only once the modifiers are put in place.\n */\nabstract contract Pausable is Context {\n    /**\n     * @dev Emitted when the pause is triggered by `account`.\n     */\n    event Paused(address account);\n\n    /**\n     * @dev Emitted when the pause is lifted by `account`.\n     */\n    event Unpaused(address account);\n\n    bool private _paused;\n\n    /**\n     * @dev Initializes the contract in unpaused state.\n     */\n    constructor() {\n        _paused = false;\n    }\n\n    /**\n     * @dev Modifier to make a function callable only when the contract is not paused.\n     *\n     * Requirements:\n     *\n     * - The contract must not be paused.\n     */\n    modifier whenNotPaused() {\n        _requireNotPaused();\n        _;\n    }\n\n    /**\n     * @dev Modifier to make a function callable only when the contract is paused.\n     *\n     * Requirements:\n     *\n     * - The contract must be paused.\n     */\n    modifier whenPaused() {\n        _requirePaused();\n        _;\n    }\n\n    /**\n     * @dev Returns true if the contract is paused, and false otherwise.\n     */\n    function paused() public view virtual returns (bool) {\n        return _paused;\n    }\n\n    /**\n     * @dev Throws if the contract is paused.\n     */\n    function _requireNotPaused() internal view virtual {\n        require(!paused(), \"Pausable: paused\");\n    }\n\n    /**\n     * @dev Throws if the contract is not paused.\n     */\n    function _requirePaused() internal view virtual {\n        require(paused(), \"Pausable: not paused\");\n    }\n\n    /**\n     * @dev Triggers stopped state.\n     *\n     * Requirements:\n     *\n     * - The contract must not be paused.\n     */\n    function _pause() internal virtual whenNotPaused {\n        _paused = true;\n        emit Paused(_msgSender());\n    }\n\n    /**\n     * @dev Returns to normal state.\n     *\n     * Requirements:\n     *\n     * - The contract must be paused.\n     */\n    function _unpause() internal virtual whenPaused {\n        _paused = false;\n        emit Unpaused(_msgSender());\n    }\n}\n"
    },
    "@openzeppelin/contracts/utils/Counters.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/Counters.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @title Counters\n * @author Matt Condon (@shrugs)\n * @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number\n * of elements in a mapping, issuing ERC721 ids, or counting request ids.\n *\n * Include with `using Counters for Counters.Counter;`\n */\nlibrary Counters {\n    struct Counter {\n        // This variable should never be directly accessed by users of the library: interactions must be restricted to\n        // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add\n        // this feature: see https://github.com/ethereum/solidity/issues/4637\n        uint256 _value; // default: 0\n    }\n\n    function current(Counter storage counter) internal view returns (uint256) {\n        return counter._value;\n    }\n\n    function increment(Counter storage counter) internal {\n        unchecked {\n            counter._value += 1;\n        }\n    }\n\n    function decrement(Counter storage counter) internal {\n        uint256 value = counter._value;\n        require(value > 0, \"Counter: decrement overflow\");\n        unchecked {\n            counter._value = value - 1;\n        }\n    }\n\n    function reset(Counter storage counter) internal {\n        counter._value = 0;\n    }\n}\n"
    },
    "@openzeppelin/contracts/utils/Address.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (utils/Address.sol)\n\npragma solidity ^0.8.1;\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary Address {\n    /**\n     * @dev Returns true if `account` is a contract.\n     *\n     * [IMPORTANT]\n     * ====\n     * It is unsafe to assume that an address for which this function returns\n     * false is an externally-owned account (EOA) and not a contract.\n     *\n     * Among others, `isContract` will return false for the following\n     * types of addresses:\n     *\n     *  - an externally-owned account\n     *  - a contract in construction\n     *  - an address where a contract will be created\n     *  - an address where a contract lived, but was destroyed\n     * ====\n     *\n     * [IMPORTANT]\n     * ====\n     * You shouldn't rely on `isContract` to protect against flash loan attacks!\n     *\n     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n     * constructor.\n     * ====\n     */\n    function isContract(address account) internal view returns (bool) {\n        // This method relies on extcodesize/address.code.length, which returns 0\n        // for contracts in construction, since the code is only stored at the end\n        // of the constructor execution.\n\n        return account.code.length > 0;\n    }\n\n    /**\n     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n     * `recipient`, forwarding all available gas and reverting on errors.\n     *\n     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n     * of certain opcodes, possibly making contracts go over the 2300 gas limit\n     * imposed by `transfer`, making them unable to receive funds via\n     * `transfer`. {sendValue} removes this limitation.\n     *\n     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n     *\n     * IMPORTANT: because control is transferred to `recipient`, care must be\n     * taken to not create reentrancy vulnerabilities. Consider using\n     * {ReentrancyGuard} or the\n     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n     */\n    function sendValue(address payable recipient, uint256 amount) internal {\n        require(address(this).balance >= amount, \"Address: insufficient balance\");\n\n        (bool success, ) = recipient.call{value: amount}(\"\");\n        require(success, \"Address: unable to send value, recipient may have reverted\");\n    }\n\n    /**\n     * @dev Performs a Solidity function call using a low level `call`. A\n     * plain `call` is an unsafe replacement for a function call: use this\n     * function instead.\n     *\n     * If `target` reverts with a revert reason, it is bubbled up by this\n     * function (like regular Solidity function calls).\n     *\n     * Returns the raw returned data. To convert to the expected return value,\n     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n     *\n     * Requirements:\n     *\n     * - `target` must be a contract.\n     * - calling `target` with `data` must not revert.\n     *\n     * _Available since v3.1._\n     */\n    function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n        return functionCall(target, data, \"Address: low-level call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n     * `errorMessage` as a fallback revert reason when `target` reverts.\n     *\n     * _Available since v3.1._\n     */\n    function functionCall(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) internal returns (bytes memory) {\n        return functionCallWithValue(target, data, 0, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but also transferring `value` wei to `target`.\n     *\n     * Requirements:\n     *\n     * - the calling contract must have an ETH balance of at least `value`.\n     * - the called Solidity function must be `payable`.\n     *\n     * _Available since v3.1._\n     */\n    function functionCallWithValue(\n        address target,\n        bytes memory data,\n        uint256 value\n    ) internal returns (bytes memory) {\n        return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n     * with `errorMessage` as a fallback revert reason when `target` reverts.\n     *\n     * _Available since v3.1._\n     */\n    function functionCallWithValue(\n        address target,\n        bytes memory data,\n        uint256 value,\n        string memory errorMessage\n    ) internal returns (bytes memory) {\n        require(address(this).balance >= value, \"Address: insufficient balance for call\");\n        require(isContract(target), \"Address: call to non-contract\");\n\n        (bool success, bytes memory returndata) = target.call{value: value}(data);\n        return verifyCallResult(success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but performing a static call.\n     *\n     * _Available since v3.3._\n     */\n    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n        return functionStaticCall(target, data, \"Address: low-level static call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n     * but performing a static call.\n     *\n     * _Available since v3.3._\n     */\n    function functionStaticCall(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) internal view returns (bytes memory) {\n        require(isContract(target), \"Address: static call to non-contract\");\n\n        (bool success, bytes memory returndata) = target.staticcall(data);\n        return verifyCallResult(success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but performing a delegate call.\n     *\n     * _Available since v3.4._\n     */\n    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n        return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n     * but performing a delegate call.\n     *\n     * _Available since v3.4._\n     */\n    function functionDelegateCall(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) internal returns (bytes memory) {\n        require(isContract(target), \"Address: delegate call to non-contract\");\n\n        (bool success, bytes memory returndata) = target.delegatecall(data);\n        return verifyCallResult(success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the\n     * revert reason using the provided one.\n     *\n     * _Available since v4.3._\n     */\n    function verifyCallResult(\n        bool success,\n        bytes memory returndata,\n        string memory errorMessage\n    ) internal pure returns (bytes memory) {\n        if (success) {\n            return returndata;\n        } else {\n            // Look for revert reason and bubble it up if present\n            if (returndata.length > 0) {\n                // The easiest way to bubble the revert reason is using memory via assembly\n                /// @solidity memory-safe-assembly\n                assembly {\n                    let returndata_size := mload(returndata)\n                    revert(add(32, returndata), returndata_size)\n                }\n            } else {\n                revert(errorMessage);\n            }\n        }\n    }\n}\n"
    },
    "@openzeppelin/contracts/access/AccessControl.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (access/AccessControl.sol)\n\npragma solidity ^0.8.0;\n\nimport \"./IAccessControl.sol\";\nimport \"../utils/Context.sol\";\nimport \"../utils/Strings.sol\";\nimport \"../utils/introspection/ERC165.sol\";\n\n/**\n * @dev Contract module that allows children to implement role-based access\n * control mechanisms. This is a lightweight version that doesn't allow enumerating role\n * members except through off-chain means by accessing the contract event logs. Some\n * applications may benefit from on-chain enumerability, for those cases see\n * {AccessControlEnumerable}.\n *\n * Roles are referred to by their `bytes32` identifier. These should be exposed\n * in the external API and be unique. The best way to achieve this is by\n * using `public constant` hash digests:\n *\n * ```\n * bytes32 public constant MY_ROLE = keccak256(\"MY_ROLE\");\n * ```\n *\n * Roles can be used to represent a set of permissions. To restrict access to a\n * function call, use {hasRole}:\n *\n * ```\n * function foo() public {\n *     require(hasRole(MY_ROLE, msg.sender));\n *     ...\n * }\n * ```\n *\n * Roles can be granted and revoked dynamically via the {grantRole} and\n * {revokeRole} functions. Each role has an associated admin role, and only\n * accounts that have a role's admin role can call {grantRole} and {revokeRole}.\n *\n * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means\n * that only accounts with this role will be able to grant or revoke other\n * roles. More complex role relationships can be created by using\n * {_setRoleAdmin}.\n *\n * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to\n * grant and revoke this role. Extra precautions should be taken to secure\n * accounts that have been granted it.\n */\nabstract contract AccessControl is Context, IAccessControl, ERC165 {\n    struct RoleData {\n        mapping(address => bool) members;\n        bytes32 adminRole;\n    }\n\n    mapping(bytes32 => RoleData) private _roles;\n\n    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;\n\n    /**\n     * @dev Modifier that checks that an account has a specific role. Reverts\n     * with a standardized message including the required role.\n     *\n     * The format of the revert reason is given by the following regular expression:\n     *\n     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/\n     *\n     * _Available since v4.1._\n     */\n    modifier onlyRole(bytes32 role) {\n        _checkRole(role);\n        _;\n    }\n\n    /**\n     * @dev See {IERC165-supportsInterface}.\n     */\n    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {\n        return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId);\n    }\n\n    /**\n     * @dev Returns `true` if `account` has been granted `role`.\n     */\n    function hasRole(bytes32 role, address account) public view virtual override returns (bool) {\n        return _roles[role].members[account];\n    }\n\n    /**\n     * @dev Revert with a standard message if `_msgSender()` is missing `role`.\n     * Overriding this function changes the behavior of the {onlyRole} modifier.\n     *\n     * Format of the revert message is described in {_checkRole}.\n     *\n     * _Available since v4.6._\n     */\n    function _checkRole(bytes32 role) internal view virtual {\n        _checkRole(role, _msgSender());\n    }\n\n    /**\n     * @dev Revert with a standard message if `account` is missing `role`.\n     *\n     * The format of the revert reason is given by the following regular expression:\n     *\n     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/\n     */\n    function _checkRole(bytes32 role, address account) internal view virtual {\n        if (!hasRole(role, account)) {\n            revert(\n                string(\n                    abi.encodePacked(\n                        \"AccessControl: account \",\n                        Strings.toHexString(uint160(account), 20),\n                        \" is missing role \",\n                        Strings.toHexString(uint256(role), 32)\n                    )\n                )\n            );\n        }\n    }\n\n    /**\n     * @dev Returns the admin role that controls `role`. See {grantRole} and\n     * {revokeRole}.\n     *\n     * To change a role's admin, use {_setRoleAdmin}.\n     */\n    function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) {\n        return _roles[role].adminRole;\n    }\n\n    /**\n     * @dev Grants `role` to `account`.\n     *\n     * If `account` had not been already granted `role`, emits a {RoleGranted}\n     * event.\n     *\n     * Requirements:\n     *\n     * - the caller must have ``role``'s admin role.\n     *\n     * May emit a {RoleGranted} event.\n     */\n    function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {\n        _grantRole(role, account);\n    }\n\n    /**\n     * @dev Revokes `role` from `account`.\n     *\n     * If `account` had been granted `role`, emits a {RoleRevoked} event.\n     *\n     * Requirements:\n     *\n     * - the caller must have ``role``'s admin role.\n     *\n     * May emit a {RoleRevoked} event.\n     */\n    function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {\n        _revokeRole(role, account);\n    }\n\n    /**\n     * @dev Revokes `role` from the calling account.\n     *\n     * Roles are often managed via {grantRole} and {revokeRole}: this function's\n     * purpose is to provide a mechanism for accounts to lose their privileges\n     * if they are compromised (such as when a trusted device is misplaced).\n     *\n     * If the calling account had been revoked `role`, emits a {RoleRevoked}\n     * event.\n     *\n     * Requirements:\n     *\n     * - the caller must be `account`.\n     *\n     * May emit a {RoleRevoked} event.\n     */\n    function renounceRole(bytes32 role, address account) public virtual override {\n        require(account == _msgSender(), \"AccessControl: can only renounce roles for self\");\n\n        _revokeRole(role, account);\n    }\n\n    /**\n     * @dev Grants `role` to `account`.\n     *\n     * If `account` had not been already granted `role`, emits a {RoleGranted}\n     * event. Note that unlike {grantRole}, this function doesn't perform any\n     * checks on the calling account.\n     *\n     * May emit a {RoleGranted} event.\n     *\n     * [WARNING]\n     * ====\n     * This function should only be called from the constructor when setting\n     * up the initial roles for the system.\n     *\n     * Using this function in any other way is effectively circumventing the admin\n     * system imposed by {AccessControl}.\n     * ====\n     *\n     * NOTE: This function is deprecated in favor of {_grantRole}.\n     */\n    function _setupRole(bytes32 role, address account) internal virtual {\n        _grantRole(role, account);\n    }\n\n    /**\n     * @dev Sets `adminRole` as ``role``'s admin role.\n     *\n     * Emits a {RoleAdminChanged} event.\n     */\n    function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {\n        bytes32 previousAdminRole = getRoleAdmin(role);\n        _roles[role].adminRole = adminRole;\n        emit RoleAdminChanged(role, previousAdminRole, adminRole);\n    }\n\n    /**\n     * @dev Grants `role` to `account`.\n     *\n     * Internal function without access restriction.\n     *\n     * May emit a {RoleGranted} event.\n     */\n    function _grantRole(bytes32 role, address account) internal virtual {\n        if (!hasRole(role, account)) {\n            _roles[role].members[account] = true;\n            emit RoleGranted(role, account, _msgSender());\n        }\n    }\n\n    /**\n     * @dev Revokes `role` from `account`.\n     *\n     * Internal function without access restriction.\n     *\n     * May emit a {RoleRevoked} event.\n     */\n    function _revokeRole(bytes32 role, address account) internal virtual {\n        if (hasRole(role, account)) {\n            _roles[role].members[account] = false;\n            emit RoleRevoked(role, account, _msgSender());\n        }\n    }\n}\n"
    },
    "@openzeppelin/contracts/token/ERC721/IERC721.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC721/IERC721.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../../utils/introspection/IERC165.sol\";\n\n/**\n * @dev Required interface of an ERC721 compliant contract.\n */\ninterface IERC721 is IERC165 {\n    /**\n     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.\n     */\n    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);\n\n    /**\n     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.\n     */\n    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);\n\n    /**\n     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.\n     */\n    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);\n\n    /**\n     * @dev Returns the number of tokens in ``owner``'s account.\n     */\n    function balanceOf(address owner) external view returns (uint256 balance);\n\n    /**\n     * @dev Returns the owner of the `tokenId` token.\n     *\n     * Requirements:\n     *\n     * - `tokenId` must exist.\n     */\n    function ownerOf(uint256 tokenId) external view returns (address owner);\n\n    /**\n     * @dev Safely transfers `tokenId` token from `from` to `to`.\n     *\n     * Requirements:\n     *\n     * - `from` cannot be the zero address.\n     * - `to` cannot be the zero address.\n     * - `tokenId` token must exist and be owned by `from`.\n     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.\n     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.\n     *\n     * Emits a {Transfer} event.\n     */\n    function safeTransferFrom(\n        address from,\n        address to,\n        uint256 tokenId,\n        bytes calldata data\n    ) external;\n\n    /**\n     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients\n     * are aware of the ERC721 protocol to prevent tokens from being forever locked.\n     *\n     * Requirements:\n     *\n     * - `from` cannot be the zero address.\n     * - `to` cannot be the zero address.\n     * - `tokenId` token must exist and be owned by `from`.\n     * - If the caller is not `from`, it must have been allowed to move this token by either {approve} or {setApprovalForAll}.\n     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.\n     *\n     * Emits a {Transfer} event.\n     */\n    function safeTransferFrom(\n        address from,\n        address to,\n        uint256 tokenId\n    ) external;\n\n    /**\n     * @dev Transfers `tokenId` token from `from` to `to`.\n     *\n     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.\n     *\n     * Requirements:\n     *\n     * - `from` cannot be the zero address.\n     * - `to` cannot be the zero address.\n     * - `tokenId` token must be owned by `from`.\n     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.\n     *\n     * Emits a {Transfer} event.\n     */\n    function transferFrom(\n        address from,\n        address to,\n        uint256 tokenId\n    ) external;\n\n    /**\n     * @dev Gives permission to `to` to transfer `tokenId` token to another account.\n     * The approval is cleared when the token is transferred.\n     *\n     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.\n     *\n     * Requirements:\n     *\n     * - The caller must own the token or be an approved operator.\n     * - `tokenId` must exist.\n     *\n     * Emits an {Approval} event.\n     */\n    function approve(address to, uint256 tokenId) external;\n\n    /**\n     * @dev Approve or remove `operator` as an operator for the caller.\n     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.\n     *\n     * Requirements:\n     *\n     * - The `operator` cannot be the caller.\n     *\n     * Emits an {ApprovalForAll} event.\n     */\n    function setApprovalForAll(address operator, bool _approved) external;\n\n    /**\n     * @dev Returns the account approved for `tokenId` token.\n     *\n     * Requirements:\n     *\n     * - `tokenId` must exist.\n     */\n    function getApproved(uint256 tokenId) external view returns (address operator);\n\n    /**\n     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.\n     *\n     * See {setApprovalForAll}\n     */\n    function isApprovedForAll(address owner, address operator) external view returns (bool);\n}\n"
    },
    "@openzeppelin/contracts/token/ERC721/utils/ERC721Holder.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (token/ERC721/utils/ERC721Holder.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../IERC721Receiver.sol\";\n\n/**\n * @dev Implementation of the {IERC721Receiver} interface.\n *\n * Accepts all token transfers.\n * Make sure the contract is able to use its token with {IERC721-safeTransferFrom}, {IERC721-approve} or {IERC721-setApprovalForAll}.\n */\ncontract ERC721Holder is IERC721Receiver {\n    /**\n     * @dev See {IERC721Receiver-onERC721Received}.\n     *\n     * Always returns `IERC721Receiver.onERC721Received.selector`.\n     */\n    function onERC721Received(\n        address,\n        address,\n        uint256,\n        bytes memory\n    ) public virtual override returns (bytes4) {\n        return this.onERC721Received.selector;\n    }\n}\n"
    },
    "@openzeppelin/contracts/utils/cryptography/ECDSA.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.3) (utils/cryptography/ECDSA.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../Strings.sol\";\n\n/**\n * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.\n *\n * These functions can be used to verify that a message was signed by the holder\n * of the private keys of a given address.\n */\nlibrary ECDSA {\n    enum RecoverError {\n        NoError,\n        InvalidSignature,\n        InvalidSignatureLength,\n        InvalidSignatureS,\n        InvalidSignatureV\n    }\n\n    function _throwError(RecoverError error) private pure {\n        if (error == RecoverError.NoError) {\n            return; // no error: do nothing\n        } else if (error == RecoverError.InvalidSignature) {\n            revert(\"ECDSA: invalid signature\");\n        } else if (error == RecoverError.InvalidSignatureLength) {\n            revert(\"ECDSA: invalid signature length\");\n        } else if (error == RecoverError.InvalidSignatureS) {\n            revert(\"ECDSA: invalid signature 's' value\");\n        } else if (error == RecoverError.InvalidSignatureV) {\n            revert(\"ECDSA: invalid signature 'v' value\");\n        }\n    }\n\n    /**\n     * @dev Returns the address that signed a hashed message (`hash`) with\n     * `signature` or error string. This address can then be used for verification purposes.\n     *\n     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:\n     * this function rejects them by requiring the `s` value to be in the lower\n     * half order, and the `v` value to be either 27 or 28.\n     *\n     * IMPORTANT: `hash` _must_ be the result of a hash operation for the\n     * verification to be secure: it is possible to craft signatures that\n     * recover to arbitrary addresses for non-hashed data. A safe way to ensure\n     * this is by receiving a hash of the original message (which may otherwise\n     * be too long), and then calling {toEthSignedMessageHash} on it.\n     *\n     * Documentation for signature generation:\n     * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]\n     * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]\n     *\n     * _Available since v4.3._\n     */\n    function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {\n        if (signature.length == 65) {\n            bytes32 r;\n            bytes32 s;\n            uint8 v;\n            // ecrecover takes the signature parameters, and the only way to get them\n            // currently is to use assembly.\n            /// @solidity memory-safe-assembly\n            assembly {\n                r := mload(add(signature, 0x20))\n                s := mload(add(signature, 0x40))\n                v := byte(0, mload(add(signature, 0x60)))\n            }\n            return tryRecover(hash, v, r, s);\n        } else {\n            return (address(0), RecoverError.InvalidSignatureLength);\n        }\n    }\n\n    /**\n     * @dev Returns the address that signed a hashed message (`hash`) with\n     * `signature`. This address can then be used for verification purposes.\n     *\n     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:\n     * this function rejects them by requiring the `s` value to be in the lower\n     * half order, and the `v` value to be either 27 or 28.\n     *\n     * IMPORTANT: `hash` _must_ be the result of a hash operation for the\n     * verification to be secure: it is possible to craft signatures that\n     * recover to arbitrary addresses for non-hashed data. A safe way to ensure\n     * this is by receiving a hash of the original message (which may otherwise\n     * be too long), and then calling {toEthSignedMessageHash} on it.\n     */\n    function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {\n        (address recovered, RecoverError error) = tryRecover(hash, signature);\n        _throwError(error);\n        return recovered;\n    }\n\n    /**\n     * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.\n     *\n     * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]\n     *\n     * _Available since v4.3._\n     */\n    function tryRecover(\n        bytes32 hash,\n        bytes32 r,\n        bytes32 vs\n    ) internal pure returns (address, RecoverError) {\n        bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);\n        uint8 v = uint8((uint256(vs) >> 255) + 27);\n        return tryRecover(hash, v, r, s);\n    }\n\n    /**\n     * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.\n     *\n     * _Available since v4.2._\n     */\n    function recover(\n        bytes32 hash,\n        bytes32 r,\n        bytes32 vs\n    ) internal pure returns (address) {\n        (address recovered, RecoverError error) = tryRecover(hash, r, vs);\n        _throwError(error);\n        return recovered;\n    }\n\n    /**\n     * @dev Overload of {ECDSA-tryRecover} that receives the `v`,\n     * `r` and `s` signature fields separately.\n     *\n     * _Available since v4.3._\n     */\n    function tryRecover(\n        bytes32 hash,\n        uint8 v,\n        bytes32 r,\n        bytes32 s\n    ) internal pure returns (address, RecoverError) {\n        // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature\n        // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines\n        // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most\n        // signatures from current libraries generate a unique signature with an s-value in the lower half order.\n        //\n        // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value\n        // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or\n        // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept\n        // these malleable signatures as well.\n        if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {\n            return (address(0), RecoverError.InvalidSignatureS);\n        }\n        if (v != 27 && v != 28) {\n            return (address(0), RecoverError.InvalidSignatureV);\n        }\n\n        // If the signature is valid (and not malleable), return the signer address\n        address signer = ecrecover(hash, v, r, s);\n        if (signer == address(0)) {\n            return (address(0), RecoverError.InvalidSignature);\n        }\n\n        return (signer, RecoverError.NoError);\n    }\n\n    /**\n     * @dev Overload of {ECDSA-recover} that receives the `v`,\n     * `r` and `s` signature fields separately.\n     */\n    function recover(\n        bytes32 hash,\n        uint8 v,\n        bytes32 r,\n        bytes32 s\n    ) internal pure returns (address) {\n        (address recovered, RecoverError error) = tryRecover(hash, v, r, s);\n        _throwError(error);\n        return recovered;\n    }\n\n    /**\n     * @dev Returns an Ethereum Signed Message, created from a `hash`. This\n     * produces hash corresponding to the one signed with the\n     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]\n     * JSON-RPC method as part of EIP-191.\n     *\n     * See {recover}.\n     */\n    function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {\n        // 32 is the length in bytes of hash,\n        // enforced by the type signature above\n        return keccak256(abi.encodePacked(\"\\x19Ethereum Signed Message:\\n32\", hash));\n    }\n\n    /**\n     * @dev Returns an Ethereum Signed Message, created from `s`. This\n     * produces hash corresponding to the one signed with the\n     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]\n     * JSON-RPC method as part of EIP-191.\n     *\n     * See {recover}.\n     */\n    function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {\n        return keccak256(abi.encodePacked(\"\\x19Ethereum Signed Message:\\n\", Strings.toString(s.length), s));\n    }\n\n    /**\n     * @dev Returns an Ethereum Signed Typed Data, created from a\n     * `domainSeparator` and a `structHash`. This produces hash corresponding\n     * to the one signed with the\n     * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]\n     * JSON-RPC method as part of EIP-712.\n     *\n     * See {recover}.\n     */\n    function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {\n        return keccak256(abi.encodePacked(\"\\x19\\x01\", domainSeparator, structHash));\n    }\n}\n"
    },
    "@openzeppelin/contracts/access/IAccessControl.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev External interface of AccessControl declared to support ERC165 detection.\n */\ninterface IAccessControl {\n    /**\n     * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`\n     *\n     * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite\n     * {RoleAdminChanged} not being emitted signaling this.\n     *\n     * _Available since v3.1._\n     */\n    event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);\n\n    /**\n     * @dev Emitted when `account` is granted `role`.\n     *\n     * `sender` is the account that originated the contract call, an admin role\n     * bearer except when using {AccessControl-_setupRole}.\n     */\n    event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);\n\n    /**\n     * @dev Emitted when `account` is revoked `role`.\n     *\n     * `sender` is the account that originated the contract call:\n     *   - if using `revokeRole`, it is the admin role bearer\n     *   - if using `renounceRole`, it is the role bearer (i.e. `account`)\n     */\n    event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);\n\n    /**\n     * @dev Returns `true` if `account` has been granted `role`.\n     */\n    function hasRole(bytes32 role, address account) external view returns (bool);\n\n    /**\n     * @dev Returns the admin role that controls `role`. See {grantRole} and\n     * {revokeRole}.\n     *\n     * To change a role's admin, use {AccessControl-_setRoleAdmin}.\n     */\n    function getRoleAdmin(bytes32 role) external view returns (bytes32);\n\n    /**\n     * @dev Grants `role` to `account`.\n     *\n     * If `account` had not been already granted `role`, emits a {RoleGranted}\n     * event.\n     *\n     * Requirements:\n     *\n     * - the caller must have ``role``'s admin role.\n     */\n    function grantRole(bytes32 role, address account) external;\n\n    /**\n     * @dev Revokes `role` from `account`.\n     *\n     * If `account` had been granted `role`, emits a {RoleRevoked} event.\n     *\n     * Requirements:\n     *\n     * - the caller must have ``role``'s admin role.\n     */\n    function revokeRole(bytes32 role, address account) external;\n\n    /**\n     * @dev Revokes `role` from the calling account.\n     *\n     * Roles are often managed via {grantRole} and {revokeRole}: this function's\n     * purpose is to provide a mechanism for accounts to lose their privileges\n     * if they are compromised (such as when a trusted device is misplaced).\n     *\n     * If the calling account had been granted `role`, emits a {RoleRevoked}\n     * event.\n     *\n     * Requirements:\n     *\n     * - the caller must be `account`.\n     */\n    function renounceRole(bytes32 role, address account) external;\n}\n"
    },
    "@openzeppelin/contracts/utils/Context.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract Context {\n    function _msgSender() internal view virtual returns (address) {\n        return msg.sender;\n    }\n\n    function _msgData() internal view virtual returns (bytes calldata) {\n        return msg.data;\n    }\n}\n"
    },
    "@openzeppelin/contracts/utils/Strings.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (utils/Strings.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev String operations.\n */\nlibrary Strings {\n    bytes16 private constant _HEX_SYMBOLS = \"0123456789abcdef\";\n    uint8 private constant _ADDRESS_LENGTH = 20;\n\n    /**\n     * @dev Converts a `uint256` to its ASCII `string` decimal representation.\n     */\n    function toString(uint256 value) internal pure returns (string memory) {\n        // Inspired by OraclizeAPI's implementation - MIT licence\n        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol\n\n        if (value == 0) {\n            return \"0\";\n        }\n        uint256 temp = value;\n        uint256 digits;\n        while (temp != 0) {\n            digits++;\n            temp /= 10;\n        }\n        bytes memory buffer = new bytes(digits);\n        while (value != 0) {\n            digits -= 1;\n            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));\n            value /= 10;\n        }\n        return string(buffer);\n    }\n\n    /**\n     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.\n     */\n    function toHexString(uint256 value) internal pure returns (string memory) {\n        if (value == 0) {\n            return \"0x00\";\n        }\n        uint256 temp = value;\n        uint256 length = 0;\n        while (temp != 0) {\n            length++;\n            temp >>= 8;\n        }\n        return toHexString(value, length);\n    }\n\n    /**\n     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.\n     */\n    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {\n        bytes memory buffer = new bytes(2 * length + 2);\n        buffer[0] = \"0\";\n        buffer[1] = \"x\";\n        for (uint256 i = 2 * length + 1; i > 1; --i) {\n            buffer[i] = _HEX_SYMBOLS[value & 0xf];\n            value >>= 4;\n        }\n        require(value == 0, \"Strings: hex length insufficient\");\n        return string(buffer);\n    }\n\n    /**\n     * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.\n     */\n    function toHexString(address addr) internal pure returns (string memory) {\n        return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);\n    }\n}\n"
    },
    "@openzeppelin/contracts/utils/introspection/ERC165.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)\n\npragma solidity ^0.8.0;\n\nimport \"./IERC165.sol\";\n\n/**\n * @dev Implementation of the {IERC165} interface.\n *\n * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check\n * for the additional interface id that will be supported. For example:\n *\n * ```solidity\n * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {\n *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);\n * }\n * ```\n *\n * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.\n */\nabstract contract ERC165 is IERC165 {\n    /**\n     * @dev See {IERC165-supportsInterface}.\n     */\n    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {\n        return interfaceId == type(IERC165).interfaceId;\n    }\n}\n"
    },
    "@openzeppelin/contracts/utils/introspection/IERC165.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC165 standard, as defined in the\n * https://eips.ethereum.org/EIPS/eip-165[EIP].\n *\n * Implementers can declare support of contract interfaces, which can then be\n * queried by others ({ERC165Checker}).\n *\n * For an implementation, see {ERC165}.\n */\ninterface IERC165 {\n    /**\n     * @dev Returns true if this contract implements the interface defined by\n     * `interfaceId`. See the corresponding\n     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]\n     * to learn more about how these ids are created.\n     *\n     * This function call must use less than 30 000 gas.\n     */\n    function supportsInterface(bytes4 interfaceId) external view returns (bool);\n}\n"
    },
    "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @title ERC721 token receiver interface\n * @dev Interface for any contract that wants to support safeTransfers\n * from ERC721 asset contracts.\n */\ninterface IERC721Receiver {\n    /**\n     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}\n     * by `operator` from `from`, this function is called.\n     *\n     * It must return its Solidity selector to confirm the token transfer.\n     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.\n     *\n     * The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`.\n     */\n    function onERC721Received(\n        address operator,\n        address from,\n        uint256 tokenId,\n        bytes calldata data\n    ) external returns (bytes4);\n}\n"
    }
  },
  "settings": {
    "optimizer": {
      "enabled": true,
      "runs": 1
    },
    "outputSelection": {
      "*": {
        "*": [
          "evm.bytecode",
          "evm.deployedBytecode",
          "devdoc",
          "userdoc",
          "metadata",
          "abi"
        ]
      }
    },
    "libraries": {}
  }
}