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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

// OZ dependencies
import {IERC1271} from "@openzeppelin/contracts/interfaces/IERC1271.sol";
import {IERC2981} from "@openzeppelin/contracts/interfaces/IERC2981.sol";
import {Address} from "@openzeppelin/contracts/utils/Address.sol";
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {IERC165, IERC721} from "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import {IERC1155} from "@openzeppelin/contracts/token/ERC1155/IERC1155.sol";

// LooksRare libraries and validation code constants
import {OrderTypes} from "../libraries/OrderTypes.sol";
import "./ValidationCodeConstants.sol";

// LooksRare interfaces
import {ICurrencyManager} from "../interfaces/ICurrencyManager.sol";
import {IExecutionManager} from "../interfaces/IExecutionManager.sol";
import {IExecutionStrategy} from "../interfaces/IExecutionStrategy.sol";
import {IRoyaltyFeeRegistry} from "../interfaces/IRoyaltyFeeRegistry.sol";
import {ITransferManagerNFT} from "../interfaces/ITransferManagerNFT.sol";
import {ITransferSelectorNFTExtended, IRoyaltyFeeManagerV1BExtended} from "./ExtendedInterfaces.sol";

// LooksRareExchange
import {LooksRareExchange} from "../LooksRareExchange.sol";

/**
 * @title OrderValidatorV1B
 * @notice This contract is used to check the validity of a maker order in the LooksRareProtocol (v1).
 *         It performs checks for:
 *         1. Nonce-related issues (e.g., nonce executed or cancelled)
 *         2. Amount-related issues (e.g. order amount being 0)
 *         3. Signature-related issues
 *         4. Whitelist-related issues (i.e., currency or strategy not whitelisted)
 *         5. Fee-related issues (e.g., minPercentageToAsk too high due to changes in royalties)
 *         6. Timestamp-related issues (e.g., order expired)
 *         7. Transfer-related issues for ERC20/ERC721/ERC1155 (approvals and balances)
 */
contract OrderValidatorV1B {
    using OrderTypes for OrderTypes.MakerOrder;

    // Number of distinct criteria groups checked to evaluate the validity
    uint256 public constant CRITERIA_GROUPS = 7;

    // ERC721 interfaceID
    bytes4 public constant INTERFACE_ID_ERC721 = 0x80ac58cd;

    // ERC1155 interfaceID
    bytes4 public constant INTERFACE_ID_ERC1155 = 0xd9b67a26;

    // ERC2981 interfaceId
    bytes4 public constant INTERFACE_ID_ERC2981 = 0x2a55205a;

    // EIP1271 magic value
    bytes4 public constant MAGIC_VALUE_EIP1271 = 0x1626ba7e;

    // TransferManager ERC721
    address public immutable TRANSFER_MANAGER_ERC721;

    // TransferManager ERC1155
    address public immutable TRANSFER_MANAGER_ERC1155;

    // Domain separator from LooksRare Exchange
    bytes32 public immutable DOMAIN_SEPARATOR;

    // Standard royalty fee
    uint256 public immutable STANDARD_ROYALTY_FEE;

    // Currency Manager
    ICurrencyManager public immutable currencyManager;

    // Execution Manager
    IExecutionManager public immutable executionManager;

    // Royalty Fee Registry
    IRoyaltyFeeRegistry public immutable royaltyFeeRegistry;

    // Transfer Selector
    ITransferSelectorNFTExtended public immutable transferSelectorNFT;

    // LooksRare Exchange
    LooksRareExchange public immutable looksRareExchange;

    /**
     * @notice Constructor
     * @param _looksRareExchange address of the LooksRare exchange (v1)
     */
    constructor(address _looksRareExchange) {
        looksRareExchange = LooksRareExchange(_looksRareExchange);
        DOMAIN_SEPARATOR = LooksRareExchange(_looksRareExchange).DOMAIN_SEPARATOR();

        TRANSFER_MANAGER_ERC721 = ITransferSelectorNFTExtended(
            address(LooksRareExchange(_looksRareExchange).transferSelectorNFT())
        ).TRANSFER_MANAGER_ERC721();

        TRANSFER_MANAGER_ERC1155 = ITransferSelectorNFTExtended(
            address(LooksRareExchange(_looksRareExchange).transferSelectorNFT())
        ).TRANSFER_MANAGER_ERC1155();

        currencyManager = LooksRareExchange(_looksRareExchange).currencyManager();
        executionManager = LooksRareExchange(_looksRareExchange).executionManager();
        transferSelectorNFT = ITransferSelectorNFTExtended(
            address(LooksRareExchange(_looksRareExchange).transferSelectorNFT())
        );

        royaltyFeeRegistry = IRoyaltyFeeManagerV1BExtended(
            address(LooksRareExchange(_looksRareExchange).royaltyFeeManager())
        ).royaltyFeeRegistry();

        STANDARD_ROYALTY_FEE = IRoyaltyFeeManagerV1BExtended(
            address(LooksRareExchange(_looksRareExchange).royaltyFeeManager())
        ).STANDARD_ROYALTY_FEE();
    }

    /**
     * @notice Check the validities for an array of maker orders
     * @param makerOrders Array of maker order structs
     * @return validationCodes Array of validation code arrays for the maker orders
     */
    function checkMultipleOrderValidities(OrderTypes.MakerOrder[] calldata makerOrders)
        public
        view
        returns (uint256[][] memory validationCodes)
    {
        validationCodes = new uint256[][](makerOrders.length);

        for (uint256 i; i < makerOrders.length; ) {
            validationCodes[i] = checkOrderValidity(makerOrders[i]);
            unchecked {
                ++i;
            }
        }
    }

    /**
     * @notice Check the validity of a maker order
     * @param makerOrder Maker order struct
     * @return validationCodes Array of validations code for each group
     */
    function checkOrderValidity(OrderTypes.MakerOrder calldata makerOrder)
        public
        view
        returns (uint256[] memory validationCodes)
    {
        validationCodes = new uint256[](CRITERIA_GROUPS);
        validationCodes[0] = checkValidityNonces(makerOrder);
        validationCodes[1] = checkValidityAmounts(makerOrder);
        validationCodes[2] = checkValiditySignature(makerOrder);
        validationCodes[3] = checkValidityWhitelists(makerOrder);
        validationCodes[4] = checkValidityMinPercentageToAsk(makerOrder);
        validationCodes[5] = checkValidityTimestamps(makerOrder);
        validationCodes[6] = checkValidityApprovalsAndBalances(makerOrder);
    }

    /**
     * @notice Check the validity for user nonces
     * @param makerOrder Maker order struct
     * @return validationCode Validation code
     */
    function checkValidityNonces(OrderTypes.MakerOrder calldata makerOrder)
        public
        view
        returns (uint256 validationCode)
    {
        if (looksRareExchange.isUserOrderNonceExecutedOrCancelled(makerOrder.signer, makerOrder.nonce))
            return NONCE_EXECUTED_OR_CANCELLED;
        if (makerOrder.nonce < looksRareExchange.userMinOrderNonce(makerOrder.signer))
            return NONCE_BELOW_MIN_ORDER_NONCE;
    }

    /**
     * @notice Check the validity of amounts
     * @param makerOrder Maker order struct
     * @return validationCode Validation code
     */
    function checkValidityAmounts(OrderTypes.MakerOrder calldata makerOrder)
        public
        pure
        returns (uint256 validationCode)
    {
        if (makerOrder.amount == 0) return ORDER_AMOUNT_CANNOT_BE_ZERO;
    }

    /**
     * @notice Check the validity of a signature
     * @param makerOrder Maker order struct
     * @return validationCode Validation code
     */
    function checkValiditySignature(OrderTypes.MakerOrder calldata makerOrder)
        public
        view
        returns (uint256 validationCode)
    {
        if (makerOrder.signer == address(0)) return MAKER_SIGNER_IS_NULL_SIGNER;

        bytes32 digest = keccak256(abi.encodePacked("\x19\x01", DOMAIN_SEPARATOR, makerOrder.hash()));

        if (!Address.isContract(makerOrder.signer)) {
            return _validateEOA(digest, makerOrder.signer, makerOrder.v, makerOrder.r, makerOrder.s);
        } else {
            return _validateERC1271(digest, makerOrder.signer, makerOrder.v, makerOrder.r, makerOrder.s);
        }
    }

    /**
     * @notice Check the validity for currency/strategy whitelists
     * @param makerOrder Maker order struct
     * @return validationCode Validation code
     */
    function checkValidityWhitelists(OrderTypes.MakerOrder calldata makerOrder)
        public
        view
        returns (uint256 validationCode)
    {
        // Verify whether the currency is whitelisted
        if (!currencyManager.isCurrencyWhitelisted(makerOrder.currency)) return CURRENCY_NOT_WHITELISTED;

        // Verify whether the strategy is whitelisted
        if (!executionManager.isStrategyWhitelisted(makerOrder.strategy)) return STRATEGY_NOT_WHITELISTED;
    }

    /**
     * @notice Check the validity of min percentage to ask
     * @param makerOrder Maker order struct
     * @return validationCode Validation code
     */
    function checkValidityMinPercentageToAsk(OrderTypes.MakerOrder calldata makerOrder)
        public
        view
        returns (uint256 validationCode)
    {
        // Return if order is bid since there is no protection for minPercentageToAsk
        if (!makerOrder.isOrderAsk) return ORDER_EXPECTED_TO_BE_VALID;

        uint256 minNetPriceToAsk = (makerOrder.minPercentageToAsk * makerOrder.price);

        uint256 finalSellerAmount = makerOrder.price;
        uint256 protocolFee = (makerOrder.price * IExecutionStrategy(makerOrder.strategy).viewProtocolFee()) / 10000;
        finalSellerAmount -= protocolFee;

        if ((finalSellerAmount * 10000) < minNetPriceToAsk) return MIN_NET_RATIO_ABOVE_PROTOCOL_FEE;

        uint256 royaltyFeeAmount = (makerOrder.price * STANDARD_ROYALTY_FEE) / 10000;

        (address receiver, ) = royaltyFeeRegistry.royaltyInfo(makerOrder.collection, makerOrder.price);

        if (receiver != address(0)) {
            // Royalty registry logic
            finalSellerAmount -= royaltyFeeAmount;
            if ((finalSellerAmount * 10000) < minNetPriceToAsk)
                return MIN_NET_RATIO_ABOVE_ROYALTY_FEE_REGISTRY_AND_PROTOCOL_FEE;
        } else {
            // ERC2981 logic
            if (IERC165(makerOrder.collection).supportsInterface(INTERFACE_ID_ERC2981)) {
                (bool success, bytes memory data) = makerOrder.collection.staticcall(
                    abi.encodeWithSelector(IERC2981.royaltyInfo.selector, makerOrder.tokenId, makerOrder.price)
                );

                if (!success) {
                    return MISSING_ROYALTY_INFO_FUNCTION_ERC2981;
                } else {
                    (receiver, ) = abi.decode(data, (address, uint256));
                }

                if (receiver != address(0)) {
                    finalSellerAmount -= royaltyFeeAmount;
                    if ((finalSellerAmount * 10000) < minNetPriceToAsk)
                        return MIN_NET_RATIO_ABOVE_ROYALTY_FEE_ERC2981_AND_PROTOCOL_FEE;
                }
            }
        }
    }

    /**
     * @notice Check the validity of order timestamps
     * @param makerOrder Maker order struct
     * @return validationCode Validation code
     */
    function checkValidityTimestamps(OrderTypes.MakerOrder calldata makerOrder)
        public
        view
        returns (uint256 validationCode)
    {
        if (makerOrder.startTime > block.timestamp) return TOO_EARLY_TO_EXECUTE_ORDER;
        if (makerOrder.endTime < block.timestamp) return TOO_LATE_TO_EXECUTE_ORDER;
    }

    /**
     * @notice Check the validity of approvals and balances
     * @param makerOrder Maker order struct
     * @return validationCode Validation code
     */
    function checkValidityApprovalsAndBalances(OrderTypes.MakerOrder calldata makerOrder)
        public
        view
        returns (uint256 validationCode)
    {
        if (makerOrder.isOrderAsk) {
            return
                _validateNFTApprovals(makerOrder.collection, makerOrder.signer, makerOrder.tokenId, makerOrder.amount);
        } else {
            return _validateERC20(makerOrder.currency, makerOrder.signer, makerOrder.price);
        }
    }

    /**
     * @notice Check the validity of NFT approvals and balances
     * @param collection Collection address
     * @param user User address
     * @param tokenId TokenId
     * @param amount Amount
     */
    function _validateNFTApprovals(
        address collection,
        address user,
        uint256 tokenId,
        uint256 amount
    ) internal view returns (uint256 validationCode) {
        address transferManager;

        if (IERC165(collection).supportsInterface(INTERFACE_ID_ERC721)) {
            transferManager = TRANSFER_MANAGER_ERC721;
        } else if (IERC165(collection).supportsInterface(INTERFACE_ID_ERC1155)) {
            transferManager = TRANSFER_MANAGER_ERC1155;
        } else {
            transferManager = transferSelectorNFT.transferManagerSelectorForCollection(collection);
        }

        if (transferManager == address(0)) return NO_TRANSFER_MANAGER_AVAILABLE_FOR_COLLECTION;

        if (transferManager == TRANSFER_MANAGER_ERC721) {
            return _validateERC721AndEquivalents(collection, user, transferManager, tokenId);
        } else if (transferManager == TRANSFER_MANAGER_ERC1155) {
            return _validateERC1155(collection, user, transferManager, tokenId, amount);
        } else {
            return CUSTOM_TRANSFER_MANAGER;
        }
    }

    /**
     * @notice Check the validity of ERC20 approvals and balances that are required to process the maker bid order
     * @param currency Currency address
     * @param user User address
     * @param price Price (defined by the maker order)
     */
    function _validateERC20(
        address currency,
        address user,
        uint256 price
    ) internal view returns (uint256 validationCode) {
        if (IERC20(currency).balanceOf(user) < price) return ERC20_BALANCE_INFERIOR_TO_PRICE;
        if (IERC20(currency).allowance(user, address(looksRareExchange)) < price)
            return ERC20_APPROVAL_INFERIOR_TO_PRICE;
    }

    /**
     * @notice Check the validity of ERC721 approvals and balances required to process the maker ask order
     * @param collection Collection address
     * @param user User address
     * @param transferManager Transfer manager address
     * @param tokenId TokenId
     */
    function _validateERC721AndEquivalents(
        address collection,
        address user,
        address transferManager,
        uint256 tokenId
    ) internal view returns (uint256 validationCode) {
        // 1. Verify tokenId is owned by user and catch revertion if ERC721 ownerOf fails
        (bool success, bytes memory data) = collection.staticcall(
            abi.encodeWithSelector(IERC721.ownerOf.selector, tokenId)
        );

        if (!success) return ERC721_TOKEN_ID_DOES_NOT_EXIST;
        if (abi.decode(data, (address)) != user) return ERC721_TOKEN_ID_NOT_IN_BALANCE;

        // 2. Verify if collection is approved by transfer manager
        (success, data) = collection.staticcall(
            abi.encodeWithSelector(IERC721.isApprovedForAll.selector, user, transferManager)
        );

        bool isApprovedAll;
        if (success) {
            isApprovedAll = abi.decode(data, (bool));
        }

        if (!isApprovedAll) {
            // 3. If collection is not approved by transfer manager, try to see if it is approved individually
            (success, data) = collection.staticcall(abi.encodeWithSelector(IERC721.getApproved.selector, tokenId));

            address approvedAddress;
            if (success) {
                approvedAddress = abi.decode(data, (address));
            }

            if (approvedAddress != transferManager) return ERC721_NO_APPROVAL_FOR_ALL_OR_TOKEN_ID;
        }
    }

    /**
     * @notice Check the validity of ERC1155 approvals and balances required to process the maker ask order
     * @param collection Collection address
     * @param user User address
     * @param transferManager Transfer manager address
     * @param tokenId TokenId
     * @param amount Amount
     */
    function _validateERC1155(
        address collection,
        address user,
        address transferManager,
        uint256 tokenId,
        uint256 amount
    ) internal view returns (uint256 validationCode) {
        (bool success, bytes memory data) = collection.staticcall(
            abi.encodeWithSelector(IERC1155.balanceOf.selector, user, tokenId)
        );

        if (!success) return ERC1155_BALANCE_OF_DOES_NOT_EXIST;
        if (abi.decode(data, (uint256)) < amount) return ERC1155_BALANCE_OF_TOKEN_ID_INFERIOR_TO_AMOUNT;

        (success, data) = collection.staticcall(
            abi.encodeWithSelector(IERC1155.isApprovedForAll.selector, user, transferManager)
        );

        if (!success) return ERC1155_IS_APPROVED_FOR_ALL_DOES_NOT_EXIST;
        if (!abi.decode(data, (bool))) return ERC1155_NO_APPROVAL_FOR_ALL;
    }

    /**
     * @notice Check the validity of EOA maker order
     * @param digest Digest
     * @param targetSigner Expected signer address to confirm message validity
     * @param v V parameter (27 or 28)
     * @param r R parameter
     * @param s S parameter
     */
    function _validateEOA(
        bytes32 digest,
        address targetSigner,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (uint256 validationCode) {
        if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0)
            return INVALID_S_PARAMETER_EOA;

        if (v != 27 && v != 28) return INVALID_V_PARAMETER_EOA;

        address signer = ecrecover(digest, v, r, s);
        if (signer == address(0)) return NULL_SIGNER_EOA;
        if (signer != targetSigner) return WRONG_SIGNER_EOA;
    }

    /**
     * @notice Check the validity for EIP1271 maker order
     * @param digest Digest
     * @param targetSigner Expected signer address to confirm message validity
     * @param v V parameter (27 or 28)
     * @param r R parameter
     * @param s S parameter
     */
    function _validateERC1271(
        bytes32 digest,
        address targetSigner,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal view returns (uint256 validationCode) {
        (bool success, bytes memory data) = targetSigner.staticcall(
            abi.encodeWithSelector(IERC1271.isValidSignature.selector, digest, abi.encodePacked(r, s, v))
        );

        if (!success) return MISSING_IS_VALID_SIGNATURE_FUNCTION_EIP1271;
        bytes4 magicValue = abi.decode(data, (bytes4));

        if (magicValue != MAGIC_VALUE_EIP1271) return SIGNATURE_INVALID_EIP1271;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (interfaces/IERC1271.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC1271 standard signature validation method for
 * contracts as defined in https://eips.ethereum.org/EIPS/eip-1271[ERC-1271].
 *
 * _Available since v4.1._
 */
interface IERC1271 {
    /**
     * @dev Should return whether the signature provided is valid for the provided data
     * @param hash      Hash of the data to be signed
     * @param signature Signature byte array associated with _data
     */
    function isValidSignature(bytes32 hash, bytes memory signature) external view returns (bytes4 magicValue);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (interfaces/IERC2981.sol)

pragma solidity ^0.8.0;

import "./IERC165.sol";

/**
 * @dev Interface for the NFT Royalty Standard
 */
interface IERC2981 is IERC165 {
    /**
     * @dev Called with the sale price to determine how much royalty is owed and to whom.
     * @param tokenId - the NFT asset queried for royalty information
     * @param salePrice - the sale price of the NFT asset specified by `tokenId`
     * @return receiver - address of who should be sent the royalty payment
     * @return royaltyAmount - the royalty payment amount for `salePrice`
     */
    function royaltyInfo(uint256 tokenId, uint256 salePrice)
        external
        view
        returns (address receiver, uint256 royaltyAmount);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Address.sol)

pragma solidity ^0.8.0;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

/**
 * @title OrderTypes
 * @notice This library contains order types for the LooksRare exchange.
 */
library OrderTypes {
    // keccak256("MakerOrder(bool isOrderAsk,address signer,address collection,uint256 price,uint256 tokenId,uint256 amount,address strategy,address currency,uint256 nonce,uint256 startTime,uint256 endTime,uint256 minPercentageToAsk,bytes params)")
    bytes32 internal constant MAKER_ORDER_HASH = 0x40261ade532fa1d2c7293df30aaadb9b3c616fae525a0b56d3d411c841a85028;

    struct MakerOrder {
        bool isOrderAsk; // true --> ask / false --> bid
        address signer; // signer of the maker order
        address collection; // collection address
        uint256 price; // price (used as )
        uint256 tokenId; // id of the token
        uint256 amount; // amount of tokens to sell/purchase (must be 1 for ERC721, 1+ for ERC1155)
        address strategy; // strategy for trade execution (e.g., DutchAuction, StandardSaleForFixedPrice)
        address currency; // currency (e.g., WETH)
        uint256 nonce; // order nonce (must be unique unless new maker order is meant to override existing one e.g., lower ask price)
        uint256 startTime; // startTime in timestamp
        uint256 endTime; // endTime in timestamp
        uint256 minPercentageToAsk; // slippage protection (9000 --> 90% of the final price must return to ask)
        bytes params; // additional parameters
        uint8 v; // v: parameter (27 or 28)
        bytes32 r; // r: parameter
        bytes32 s; // s: parameter
    }

    struct TakerOrder {
        bool isOrderAsk; // true --> ask / false --> bid
        address taker; // msg.sender
        uint256 price; // final price for the purchase
        uint256 tokenId;
        uint256 minPercentageToAsk; // // slippage protection (9000 --> 90% of the final price must return to ask)
        bytes params; // other params (e.g., tokenId)
    }

    function hash(MakerOrder memory makerOrder) internal pure returns (bytes32) {
        return
            keccak256(
                abi.encode(
                    MAKER_ORDER_HASH,
                    makerOrder.isOrderAsk,
                    makerOrder.signer,
                    makerOrder.collection,
                    makerOrder.price,
                    makerOrder.tokenId,
                    makerOrder.amount,
                    makerOrder.strategy,
                    makerOrder.currency,
                    makerOrder.nonce,
                    makerOrder.startTime,
                    makerOrder.endTime,
                    makerOrder.minPercentageToAsk,
                    keccak256(makerOrder.params)
                )
            );
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;

import "../../utils/introspection/IERC165.sol";

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of tokens in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256 balance);

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address owner);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool _approved) external;

    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}
     */
    function isApprovedForAll(address owner, address operator) external view returns (bool);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes calldata data
    ) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC1155/IERC1155.sol)

pragma solidity ^0.8.0;

import "../../utils/introspection/IERC165.sol";

/**
 * @dev Required interface of an ERC1155 compliant contract, as defined in the
 * https://eips.ethereum.org/EIPS/eip-1155[EIP].
 *
 * _Available since v3.1._
 */
interface IERC1155 is IERC165 {
    /**
     * @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
     */
    event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);

    /**
     * @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
     * transfers.
     */
    event TransferBatch(
        address indexed operator,
        address indexed from,
        address indexed to,
        uint256[] ids,
        uint256[] values
    );

    /**
     * @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
     * `approved`.
     */
    event ApprovalForAll(address indexed account, address indexed operator, bool approved);

    /**
     * @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
     *
     * If an {URI} event was emitted for `id`, the standard
     * https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
     * returned by {IERC1155MetadataURI-uri}.
     */
    event URI(string value, uint256 indexed id);

    /**
     * @dev Returns the amount of tokens of token type `id` owned by `account`.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function balanceOf(address account, uint256 id) external view returns (uint256);

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
     *
     * Requirements:
     *
     * - `accounts` and `ids` must have the same length.
     */
    function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids)
        external
        view
        returns (uint256[] memory);

    /**
     * @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
     *
     * Emits an {ApprovalForAll} event.
     *
     * Requirements:
     *
     * - `operator` cannot be the caller.
     */
    function setApprovalForAll(address operator, bool approved) external;

    /**
     * @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
     *
     * See {setApprovalForAll}.
     */
    function isApprovedForAll(address account, address operator) external view returns (bool);

    /**
     * @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
     *
     * Emits a {TransferSingle} event.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - If the caller is not `from`, it must be have been approved to spend ``from``'s tokens via {setApprovalForAll}.
     * - `from` must have a balance of tokens of type `id` of at least `amount`.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
     * acceptance magic value.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 id,
        uint256 amount,
        bytes calldata data
    ) external;

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
     *
     * Emits a {TransferBatch} event.
     *
     * Requirements:
     *
     * - `ids` and `amounts` must have the same length.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
     * acceptance magic value.
     */
    function safeBatchTransferFrom(
        address from,
        address to,
        uint256[] calldata ids,
        uint256[] calldata amounts,
        bytes calldata data
    ) external;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

// OpenZeppelin contracts
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {ReentrancyGuard} from "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import {IERC20, SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

// LooksRare interfaces
import {ICurrencyManager} from "./interfaces/ICurrencyManager.sol";
import {IExecutionManager} from "./interfaces/IExecutionManager.sol";
import {IExecutionStrategy} from "./interfaces/IExecutionStrategy.sol";
import {IRoyaltyFeeManager} from "./interfaces/IRoyaltyFeeManager.sol";
import {ILooksRareExchange} from "./interfaces/ILooksRareExchange.sol";
import {ITransferManagerNFT} from "./interfaces/ITransferManagerNFT.sol";
import {ITransferSelectorNFT} from "./interfaces/ITransferSelectorNFT.sol";
import {IWETH} from "./interfaces/IWETH.sol";

// LooksRare libraries
import {OrderTypes} from "./libraries/OrderTypes.sol";
import {SignatureChecker} from "./libraries/SignatureChecker.sol";

/**
 * @title LooksRareExchange
 * @notice It is the core contract of the LooksRare exchange.
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 */
contract LooksRareExchange is ILooksRareExchange, ReentrancyGuard, Ownable {
    using SafeERC20 for IERC20;

    using OrderTypes for OrderTypes.MakerOrder;
    using OrderTypes for OrderTypes.TakerOrder;

    address public immutable WETH;
    bytes32 public immutable DOMAIN_SEPARATOR;

    address public protocolFeeRecipient;

    ICurrencyManager public currencyManager;
    IExecutionManager public executionManager;
    IRoyaltyFeeManager public royaltyFeeManager;
    ITransferSelectorNFT public transferSelectorNFT;

    mapping(address => uint256) public userMinOrderNonce;
    mapping(address => mapping(uint256 => bool)) private _isUserOrderNonceExecutedOrCancelled;

    event CancelAllOrders(address indexed user, uint256 newMinNonce);
    event CancelMultipleOrders(address indexed user, uint256[] orderNonces);
    event NewCurrencyManager(address indexed currencyManager);
    event NewExecutionManager(address indexed executionManager);
    event NewProtocolFeeRecipient(address indexed protocolFeeRecipient);
    event NewRoyaltyFeeManager(address indexed royaltyFeeManager);
    event NewTransferSelectorNFT(address indexed transferSelectorNFT);

    event RoyaltyPayment(
        address indexed collection,
        uint256 indexed tokenId,
        address indexed royaltyRecipient,
        address currency,
        uint256 amount
    );

    event TakerAsk(
        bytes32 orderHash, // bid hash of the maker order
        uint256 orderNonce, // user order nonce
        address indexed taker, // sender address for the taker ask order
        address indexed maker, // maker address of the initial bid order
        address indexed strategy, // strategy that defines the execution
        address currency, // currency address
        address collection, // collection address
        uint256 tokenId, // tokenId transferred
        uint256 amount, // amount of tokens transferred
        uint256 price // final transacted price
    );

    event TakerBid(
        bytes32 orderHash, // ask hash of the maker order
        uint256 orderNonce, // user order nonce
        address indexed taker, // sender address for the taker bid order
        address indexed maker, // maker address of the initial ask order
        address indexed strategy, // strategy that defines the execution
        address currency, // currency address
        address collection, // collection address
        uint256 tokenId, // tokenId transferred
        uint256 amount, // amount of tokens transferred
        uint256 price // final transacted price
    );

    /**
     * @notice Constructor
     * @param _currencyManager currency manager address
     * @param _executionManager execution manager address
     * @param _royaltyFeeManager royalty fee manager address
     * @param _WETH wrapped ether address (for other chains, use wrapped native asset)
     * @param _protocolFeeRecipient protocol fee recipient
     */
    constructor(
        address _currencyManager,
        address _executionManager,
        address _royaltyFeeManager,
        address _WETH,
        address _protocolFeeRecipient
    ) {
        // Calculate the domain separator
        DOMAIN_SEPARATOR = keccak256(
            abi.encode(
                0x8b73c3c69bb8fe3d512ecc4cf759cc79239f7b179b0ffacaa9a75d522b39400f, // keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)")
                0xda9101ba92939daf4bb2e18cd5f942363b9297fbc3232c9dd964abb1fb70ed71, // keccak256("LooksRareExchange")
                0xc89efdaa54c0f20c7adf612882df0950f5a951637e0307cdcb4c672f298b8bc6, // keccak256(bytes("1")) for versionId = 1
                block.chainid,
                address(this)
            )
        );

        currencyManager = ICurrencyManager(_currencyManager);
        executionManager = IExecutionManager(_executionManager);
        royaltyFeeManager = IRoyaltyFeeManager(_royaltyFeeManager);
        WETH = _WETH;
        protocolFeeRecipient = _protocolFeeRecipient;
    }

    /**
     * @notice Cancel all pending orders for a sender
     * @param minNonce minimum user nonce
     */
    function cancelAllOrdersForSender(uint256 minNonce) external {
        require(minNonce > userMinOrderNonce[msg.sender], "Cancel: Order nonce lower than current");
        require(minNonce < userMinOrderNonce[msg.sender] + 500000, "Cancel: Cannot cancel more orders");
        userMinOrderNonce[msg.sender] = minNonce;

        emit CancelAllOrders(msg.sender, minNonce);
    }

    /**
     * @notice Cancel maker orders
     * @param orderNonces array of order nonces
     */
    function cancelMultipleMakerOrders(uint256[] calldata orderNonces) external {
        require(orderNonces.length > 0, "Cancel: Cannot be empty");

        for (uint256 i = 0; i < orderNonces.length; i++) {
            require(orderNonces[i] >= userMinOrderNonce[msg.sender], "Cancel: Order nonce lower than current");
            _isUserOrderNonceExecutedOrCancelled[msg.sender][orderNonces[i]] = true;
        }

        emit CancelMultipleOrders(msg.sender, orderNonces);
    }

    /**
     * @notice Match ask with a taker bid order using ETH
     * @param takerBid taker bid order
     * @param makerAsk maker ask order
     */
    function matchAskWithTakerBidUsingETHAndWETH(
        OrderTypes.TakerOrder calldata takerBid,
        OrderTypes.MakerOrder calldata makerAsk
    ) external payable override nonReentrant {
        require((makerAsk.isOrderAsk) && (!takerBid.isOrderAsk), "Order: Wrong sides");
        require(makerAsk.currency == WETH, "Order: Currency must be WETH");
        require(msg.sender == takerBid.taker, "Order: Taker must be the sender");

        // If not enough ETH to cover the price, use WETH
        if (takerBid.price > msg.value) {
            IERC20(WETH).safeTransferFrom(msg.sender, address(this), (takerBid.price - msg.value));
        } else {
            require(takerBid.price == msg.value, "Order: Msg.value too high");
        }

        // Wrap ETH sent to this contract
        IWETH(WETH).deposit{value: msg.value}();

        // Check the maker ask order
        bytes32 askHash = makerAsk.hash();
        _validateOrder(makerAsk, askHash);

        // Retrieve execution parameters
        (bool isExecutionValid, uint256 tokenId, uint256 amount) = IExecutionStrategy(makerAsk.strategy)
            .canExecuteTakerBid(takerBid, makerAsk);

        require(isExecutionValid, "Strategy: Execution invalid");

        // Update maker ask order status to true (prevents replay)
        _isUserOrderNonceExecutedOrCancelled[makerAsk.signer][makerAsk.nonce] = true;

        // Execution part 1/2
        _transferFeesAndFundsWithWETH(
            makerAsk.strategy,
            makerAsk.collection,
            tokenId,
            makerAsk.signer,
            takerBid.price,
            makerAsk.minPercentageToAsk
        );

        // Execution part 2/2
        _transferNonFungibleToken(makerAsk.collection, makerAsk.signer, takerBid.taker, tokenId, amount);

        emit TakerBid(
            askHash,
            makerAsk.nonce,
            takerBid.taker,
            makerAsk.signer,
            makerAsk.strategy,
            makerAsk.currency,
            makerAsk.collection,
            tokenId,
            amount,
            takerBid.price
        );
    }

    /**
     * @notice Match a takerBid with a matchAsk
     * @param takerBid taker bid order
     * @param makerAsk maker ask order
     */
    function matchAskWithTakerBid(OrderTypes.TakerOrder calldata takerBid, OrderTypes.MakerOrder calldata makerAsk)
        external
        override
        nonReentrant
    {
        require((makerAsk.isOrderAsk) && (!takerBid.isOrderAsk), "Order: Wrong sides");
        require(msg.sender == takerBid.taker, "Order: Taker must be the sender");

        // Check the maker ask order
        bytes32 askHash = makerAsk.hash();
        _validateOrder(makerAsk, askHash);

        (bool isExecutionValid, uint256 tokenId, uint256 amount) = IExecutionStrategy(makerAsk.strategy)
            .canExecuteTakerBid(takerBid, makerAsk);

        require(isExecutionValid, "Strategy: Execution invalid");

        // Update maker ask order status to true (prevents replay)
        _isUserOrderNonceExecutedOrCancelled[makerAsk.signer][makerAsk.nonce] = true;

        // Execution part 1/2
        _transferFeesAndFunds(
            makerAsk.strategy,
            makerAsk.collection,
            tokenId,
            makerAsk.currency,
            msg.sender,
            makerAsk.signer,
            takerBid.price,
            makerAsk.minPercentageToAsk
        );

        // Execution part 2/2
        _transferNonFungibleToken(makerAsk.collection, makerAsk.signer, takerBid.taker, tokenId, amount);

        emit TakerBid(
            askHash,
            makerAsk.nonce,
            takerBid.taker,
            makerAsk.signer,
            makerAsk.strategy,
            makerAsk.currency,
            makerAsk.collection,
            tokenId,
            amount,
            takerBid.price
        );
    }

    /**
     * @notice Match a takerAsk with a makerBid
     * @param takerAsk taker ask order
     * @param makerBid maker bid order
     */
    function matchBidWithTakerAsk(OrderTypes.TakerOrder calldata takerAsk, OrderTypes.MakerOrder calldata makerBid)
        external
        override
        nonReentrant
    {
        require((!makerBid.isOrderAsk) && (takerAsk.isOrderAsk), "Order: Wrong sides");
        require(msg.sender == takerAsk.taker, "Order: Taker must be the sender");

        // Check the maker bid order
        bytes32 bidHash = makerBid.hash();
        _validateOrder(makerBid, bidHash);

        (bool isExecutionValid, uint256 tokenId, uint256 amount) = IExecutionStrategy(makerBid.strategy)
            .canExecuteTakerAsk(takerAsk, makerBid);

        require(isExecutionValid, "Strategy: Execution invalid");

        // Update maker bid order status to true (prevents replay)
        _isUserOrderNonceExecutedOrCancelled[makerBid.signer][makerBid.nonce] = true;

        // Execution part 1/2
        _transferNonFungibleToken(makerBid.collection, msg.sender, makerBid.signer, tokenId, amount);

        // Execution part 2/2
        _transferFeesAndFunds(
            makerBid.strategy,
            makerBid.collection,
            tokenId,
            makerBid.currency,
            makerBid.signer,
            takerAsk.taker,
            takerAsk.price,
            takerAsk.minPercentageToAsk
        );

        emit TakerAsk(
            bidHash,
            makerBid.nonce,
            takerAsk.taker,
            makerBid.signer,
            makerBid.strategy,
            makerBid.currency,
            makerBid.collection,
            tokenId,
            amount,
            takerAsk.price
        );
    }

    /**
     * @notice Update currency manager
     * @param _currencyManager new currency manager address
     */
    function updateCurrencyManager(address _currencyManager) external onlyOwner {
        require(_currencyManager != address(0), "Owner: Cannot be null address");
        currencyManager = ICurrencyManager(_currencyManager);
        emit NewCurrencyManager(_currencyManager);
    }

    /**
     * @notice Update execution manager
     * @param _executionManager new execution manager address
     */
    function updateExecutionManager(address _executionManager) external onlyOwner {
        require(_executionManager != address(0), "Owner: Cannot be null address");
        executionManager = IExecutionManager(_executionManager);
        emit NewExecutionManager(_executionManager);
    }

    /**
     * @notice Update protocol fee and recipient
     * @param _protocolFeeRecipient new recipient for protocol fees
     */
    function updateProtocolFeeRecipient(address _protocolFeeRecipient) external onlyOwner {
        protocolFeeRecipient = _protocolFeeRecipient;
        emit NewProtocolFeeRecipient(_protocolFeeRecipient);
    }

    /**
     * @notice Update royalty fee manager
     * @param _royaltyFeeManager new fee manager address
     */
    function updateRoyaltyFeeManager(address _royaltyFeeManager) external onlyOwner {
        require(_royaltyFeeManager != address(0), "Owner: Cannot be null address");
        royaltyFeeManager = IRoyaltyFeeManager(_royaltyFeeManager);
        emit NewRoyaltyFeeManager(_royaltyFeeManager);
    }

    /**
     * @notice Update transfer selector NFT
     * @param _transferSelectorNFT new transfer selector address
     */
    function updateTransferSelectorNFT(address _transferSelectorNFT) external onlyOwner {
        require(_transferSelectorNFT != address(0), "Owner: Cannot be null address");
        transferSelectorNFT = ITransferSelectorNFT(_transferSelectorNFT);

        emit NewTransferSelectorNFT(_transferSelectorNFT);
    }

    /**
     * @notice Check whether user order nonce is executed or cancelled
     * @param user address of user
     * @param orderNonce nonce of the order
     */
    function isUserOrderNonceExecutedOrCancelled(address user, uint256 orderNonce) external view returns (bool) {
        return _isUserOrderNonceExecutedOrCancelled[user][orderNonce];
    }

    /**
     * @notice Transfer fees and funds to royalty recipient, protocol, and seller
     * @param strategy address of the execution strategy
     * @param collection non fungible token address for the transfer
     * @param tokenId tokenId
     * @param currency currency being used for the purchase (e.g., WETH/USDC)
     * @param from sender of the funds
     * @param to seller's recipient
     * @param amount amount being transferred (in currency)
     * @param minPercentageToAsk minimum percentage of the gross amount that goes to ask
     */
    function _transferFeesAndFunds(
        address strategy,
        address collection,
        uint256 tokenId,
        address currency,
        address from,
        address to,
        uint256 amount,
        uint256 minPercentageToAsk
    ) internal {
        // Initialize the final amount that is transferred to seller
        uint256 finalSellerAmount = amount;

        // 1. Protocol fee
        {
            uint256 protocolFeeAmount = _calculateProtocolFee(strategy, amount);

            // Check if the protocol fee is different than 0 for this strategy
            if ((protocolFeeRecipient != address(0)) && (protocolFeeAmount != 0)) {
                IERC20(currency).safeTransferFrom(from, protocolFeeRecipient, protocolFeeAmount);
                finalSellerAmount -= protocolFeeAmount;
            }
        }

        // 2. Royalty fee
        {
            (address royaltyFeeRecipient, uint256 royaltyFeeAmount) = royaltyFeeManager
                .calculateRoyaltyFeeAndGetRecipient(collection, tokenId, amount);

            // Check if there is a royalty fee and that it is different to 0
            if ((royaltyFeeRecipient != address(0)) && (royaltyFeeAmount != 0)) {
                IERC20(currency).safeTransferFrom(from, royaltyFeeRecipient, royaltyFeeAmount);
                finalSellerAmount -= royaltyFeeAmount;

                emit RoyaltyPayment(collection, tokenId, royaltyFeeRecipient, currency, royaltyFeeAmount);
            }
        }

        require((finalSellerAmount * 10000) >= (minPercentageToAsk * amount), "Fees: Higher than expected");

        // 3. Transfer final amount (post-fees) to seller
        {
            IERC20(currency).safeTransferFrom(from, to, finalSellerAmount);
        }
    }

    /**
     * @notice Transfer fees and funds to royalty recipient, protocol, and seller
     * @param strategy address of the execution strategy
     * @param collection non fungible token address for the transfer
     * @param tokenId tokenId
     * @param to seller's recipient
     * @param amount amount being transferred (in currency)
     * @param minPercentageToAsk minimum percentage of the gross amount that goes to ask
     */
    function _transferFeesAndFundsWithWETH(
        address strategy,
        address collection,
        uint256 tokenId,
        address to,
        uint256 amount,
        uint256 minPercentageToAsk
    ) internal {
        // Initialize the final amount that is transferred to seller
        uint256 finalSellerAmount = amount;

        // 1. Protocol fee
        {
            uint256 protocolFeeAmount = _calculateProtocolFee(strategy, amount);

            // Check if the protocol fee is different than 0 for this strategy
            if ((protocolFeeRecipient != address(0)) && (protocolFeeAmount != 0)) {
                IERC20(WETH).safeTransfer(protocolFeeRecipient, protocolFeeAmount);
                finalSellerAmount -= protocolFeeAmount;
            }
        }

        // 2. Royalty fee
        {
            (address royaltyFeeRecipient, uint256 royaltyFeeAmount) = royaltyFeeManager
                .calculateRoyaltyFeeAndGetRecipient(collection, tokenId, amount);

            // Check if there is a royalty fee and that it is different to 0
            if ((royaltyFeeRecipient != address(0)) && (royaltyFeeAmount != 0)) {
                IERC20(WETH).safeTransfer(royaltyFeeRecipient, royaltyFeeAmount);
                finalSellerAmount -= royaltyFeeAmount;

                emit RoyaltyPayment(collection, tokenId, royaltyFeeRecipient, address(WETH), royaltyFeeAmount);
            }
        }

        require((finalSellerAmount * 10000) >= (minPercentageToAsk * amount), "Fees: Higher than expected");

        // 3. Transfer final amount (post-fees) to seller
        {
            IERC20(WETH).safeTransfer(to, finalSellerAmount);
        }
    }

    /**
     * @notice Transfer NFT
     * @param collection address of the token collection
     * @param from address of the sender
     * @param to address of the recipient
     * @param tokenId tokenId
     * @param amount amount of tokens (1 for ERC721, 1+ for ERC1155)
     * @dev For ERC721, amount is not used
     */
    function _transferNonFungibleToken(
        address collection,
        address from,
        address to,
        uint256 tokenId,
        uint256 amount
    ) internal {
        // Retrieve the transfer manager address
        address transferManager = transferSelectorNFT.checkTransferManagerForToken(collection);

        // If no transfer manager found, it returns address(0)
        require(transferManager != address(0), "Transfer: No NFT transfer manager available");

        // If one is found, transfer the token
        ITransferManagerNFT(transferManager).transferNonFungibleToken(collection, from, to, tokenId, amount);
    }

    /**
     * @notice Calculate protocol fee for an execution strategy
     * @param executionStrategy strategy
     * @param amount amount to transfer
     */
    function _calculateProtocolFee(address executionStrategy, uint256 amount) internal view returns (uint256) {
        uint256 protocolFee = IExecutionStrategy(executionStrategy).viewProtocolFee();
        return (protocolFee * amount) / 10000;
    }

    /**
     * @notice Verify the validity of the maker order
     * @param makerOrder maker order
     * @param orderHash computed hash for the order
     */
    function _validateOrder(OrderTypes.MakerOrder calldata makerOrder, bytes32 orderHash) internal view {
        // Verify whether order nonce has expired
        require(
            (!_isUserOrderNonceExecutedOrCancelled[makerOrder.signer][makerOrder.nonce]) &&
                (makerOrder.nonce >= userMinOrderNonce[makerOrder.signer]),
            "Order: Matching order expired"
        );

        // Verify the signer is not address(0)
        require(makerOrder.signer != address(0), "Order: Invalid signer");

        // Verify the amount is not 0
        require(makerOrder.amount > 0, "Order: Amount cannot be 0");

        // Verify the validity of the signature
        require(
            SignatureChecker.verify(
                orderHash,
                makerOrder.signer,
                makerOrder.v,
                makerOrder.r,
                makerOrder.s,
                DOMAIN_SEPARATOR
            ),
            "Signature: Invalid"
        );

        // Verify whether the currency is whitelisted
        require(currencyManager.isCurrencyWhitelisted(makerOrder.currency), "Currency: Not whitelisted");

        // Verify whether strategy can be executed
        require(executionManager.isStrategyWhitelisted(makerOrder.strategy), "Strategy: Not whitelisted");
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface ICurrencyManager {
    function addCurrency(address currency) external;

    function removeCurrency(address currency) external;

    function isCurrencyWhitelisted(address currency) external view returns (bool);

    function viewWhitelistedCurrencies(uint256 cursor, uint256 size) external view returns (address[] memory, uint256);

    function viewCountWhitelistedCurrencies() external view returns (uint256);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface IExecutionManager {
    function addStrategy(address strategy) external;

    function removeStrategy(address strategy) external;

    function isStrategyWhitelisted(address strategy) external view returns (bool);

    function viewWhitelistedStrategies(uint256 cursor, uint256 size) external view returns (address[] memory, uint256);

    function viewCountWhitelistedStrategies() external view returns (uint256);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

uint256 constant ORDER_EXPECTED_TO_BE_VALID = 0;
uint256 constant NONCE_EXECUTED_OR_CANCELLED = 101;
uint256 constant NONCE_BELOW_MIN_ORDER_NONCE = 102;
uint256 constant ORDER_AMOUNT_CANNOT_BE_ZERO = 201;
uint256 constant MAKER_SIGNER_IS_NULL_SIGNER = 301;
uint256 constant INVALID_S_PARAMETER_EOA = 302;
uint256 constant INVALID_V_PARAMETER_EOA = 303;
uint256 constant NULL_SIGNER_EOA = 304;
uint256 constant WRONG_SIGNER_EOA = 305;
uint256 constant SIGNATURE_INVALID_EIP1271 = 311;
uint256 constant MISSING_IS_VALID_SIGNATURE_FUNCTION_EIP1271 = 312;
uint256 constant CURRENCY_NOT_WHITELISTED = 401;
uint256 constant STRATEGY_NOT_WHITELISTED = 402;
uint256 constant MIN_NET_RATIO_ABOVE_PROTOCOL_FEE = 501;
uint256 constant MIN_NET_RATIO_ABOVE_ROYALTY_FEE_REGISTRY_AND_PROTOCOL_FEE = 502;
uint256 constant MIN_NET_RATIO_ABOVE_ROYALTY_FEE_ERC2981_AND_PROTOCOL_FEE = 503;
uint256 constant MISSING_ROYALTY_INFO_FUNCTION_ERC2981 = 504;
uint256 constant TOO_EARLY_TO_EXECUTE_ORDER = 601;
uint256 constant TOO_LATE_TO_EXECUTE_ORDER = 602;
uint256 constant NO_TRANSFER_MANAGER_AVAILABLE_FOR_COLLECTION = 701;
uint256 constant CUSTOM_TRANSFER_MANAGER = 702;
uint256 constant ERC20_BALANCE_INFERIOR_TO_PRICE = 711;
uint256 constant ERC20_APPROVAL_INFERIOR_TO_PRICE = 712;
uint256 constant ERC721_TOKEN_ID_DOES_NOT_EXIST = 721;
uint256 constant ERC721_TOKEN_ID_NOT_IN_BALANCE = 722;
uint256 constant ERC721_NO_APPROVAL_FOR_ALL_OR_TOKEN_ID = 723;
uint256 constant ERC1155_BALANCE_OF_DOES_NOT_EXIST = 731;
uint256 constant ERC1155_BALANCE_OF_TOKEN_ID_INFERIOR_TO_AMOUNT = 732;
uint256 constant ERC1155_IS_APPROVED_FOR_ALL_DOES_NOT_EXIST = 733;
uint256 constant ERC1155_NO_APPROVAL_FOR_ALL = 734;

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface IRoyaltyFeeRegistry {
    function updateRoyaltyInfoForCollection(
        address collection,
        address setter,
        address receiver,
        uint256 fee
    ) external;

    function updateRoyaltyFeeLimit(uint256 _royaltyFeeLimit) external;

    function royaltyInfo(address collection, uint256 amount) external view returns (address, uint256);

    function royaltyFeeInfoCollection(address collection)
        external
        view
        returns (
            address,
            address,
            uint256
        );
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import {OrderTypes} from "../libraries/OrderTypes.sol";

interface IExecutionStrategy {
    function canExecuteTakerAsk(OrderTypes.TakerOrder calldata takerAsk, OrderTypes.MakerOrder calldata makerBid)
        external
        view
        returns (
            bool,
            uint256,
            uint256
        );

    function canExecuteTakerBid(OrderTypes.TakerOrder calldata takerBid, OrderTypes.MakerOrder calldata makerAsk)
        external
        view
        returns (
            bool,
            uint256,
            uint256
        );

    function viewProtocolFee() external view returns (uint256);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface ITransferManagerNFT {
    function transferNonFungibleToken(
        address collection,
        address from,
        address to,
        uint256 tokenId,
        uint256 amount
    ) external;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import {IRoyaltyFeeRegistry} from "../interfaces/IRoyaltyFeeRegistry.sol";
import {IRoyaltyFeeManager} from "../interfaces/IRoyaltyFeeManager.sol";
import {ITransferSelectorNFT} from "../interfaces/ITransferSelectorNFT.sol";

interface IRoyaltyFeeManagerExtended is IRoyaltyFeeManager {
    function royaltyFeeRegistry() external view returns (IRoyaltyFeeRegistry);
}

interface IRoyaltyFeeManagerV1BExtended is IRoyaltyFeeManager {
    function STANDARD_ROYALTY_FEE() external view returns (uint256);

    function royaltyFeeRegistry() external view returns (IRoyaltyFeeRegistry);
}

interface ITransferSelectorNFTExtended is ITransferSelectorNFT {
    function TRANSFER_MANAGER_ERC721() external view returns (address);

    function TRANSFER_MANAGER_ERC1155() external view returns (address);

    function transferManagerSelectorForCollection(address collection) external view returns (address);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (interfaces/IERC165.sol)

pragma solidity ^0.8.0;

import "../utils/introspection/IERC165.sol";

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;

        _;

        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import {OrderTypes} from "../libraries/OrderTypes.sol";

interface ILooksRareExchange {
    function matchAskWithTakerBidUsingETHAndWETH(
        OrderTypes.TakerOrder calldata takerBid,
        OrderTypes.MakerOrder calldata makerAsk
    ) external payable;

    function matchAskWithTakerBid(OrderTypes.TakerOrder calldata takerBid, OrderTypes.MakerOrder calldata makerAsk)
        external;

    function matchBidWithTakerAsk(OrderTypes.TakerOrder calldata takerAsk, OrderTypes.MakerOrder calldata makerBid)
        external;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface IRoyaltyFeeManager {
    function calculateRoyaltyFeeAndGetRecipient(
        address collection,
        uint256 tokenId,
        uint256 amount
    ) external view returns (address, uint256);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface ITransferSelectorNFT {
    function checkTransferManagerForToken(address collection) external view returns (address);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import {Address} from "@openzeppelin/contracts/utils/Address.sol";
import {IERC1271} from "@openzeppelin/contracts/interfaces/IERC1271.sol";

/**
 * @title SignatureChecker
 * @notice This library allows verification of signatures for both EOAs and contracts.
 */
library SignatureChecker {
    /**
     * @notice Recovers the signer of a signature (for EOA)
     * @param hash the hash containing the signed mesage
     * @param v parameter (27 or 28). This prevents maleability since the public key recovery equation has two possible solutions.
     * @param r parameter
     * @param s parameter
     */
    function recover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address) {
        // https://ethereum.stackexchange.com/questions/83174/is-it-best-practice-to-check-signature-malleability-in-ecrecover
        // https://crypto.iacr.org/2019/affevents/wac/medias/Heninger-BiasedNonceSense.pdf
        require(
            uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0,
            "Signature: Invalid s parameter"
        );

        require(v == 27 || v == 28, "Signature: Invalid v parameter");

        // If the signature is valid (and not malleable), return the signer address
        address signer = ecrecover(hash, v, r, s);
        require(signer != address(0), "Signature: Invalid signer");

        return signer;
    }

    /**
     * @notice Returns whether the signer matches the signed message
     * @param hash the hash containing the signed mesage
     * @param signer the signer address to confirm message validity
     * @param v parameter (27 or 28)
     * @param r parameter
     * @param s parameter
     * @param domainSeparator paramer to prevent signature being executed in other chains and environments
     * @return true --> if valid // false --> if invalid
     */
    function verify(
        bytes32 hash,
        address signer,
        uint8 v,
        bytes32 r,
        bytes32 s,
        bytes32 domainSeparator
    ) internal view returns (bool) {
        // \x19\x01 is the standardized encoding prefix
        // https://eips.ethereum.org/EIPS/eip-712#specification
        bytes32 digest = keccak256(abi.encodePacked("\x19\x01", domainSeparator, hash));
        if (Address.isContract(signer)) {
            // 0x1626ba7e is the interfaceId for signature contracts (see IERC1271)
            return IERC1271(signer).isValidSignature(digest, abi.encodePacked(r, s, v)) == 0x1626ba7e;
        } else {
            return recover(digest, v, r, s) == signer;
        }
    }
}

// SPDX-License-Identifier: GNU
pragma solidity >=0.5.0;

interface IWETH {
    function deposit() external payable;

    function transfer(address to, uint256 value) external returns (bool);

    function withdraw(uint256) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../../../utils/Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using Address for address;

    function safeTransfer(
        IERC20 token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(
        IERC20 token,
        address from,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            uint256 newAllowance = oldAllowance - value;
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
        }
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        if (returndata.length > 0) {
            // Return data is optional
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 888888
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"address","name":"_looksRareExchange","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"CRITERIA_GROUPS","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"DOMAIN_SEPARATOR","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"INTERFACE_ID_ERC1155","outputs":[{"internalType":"bytes4","name":"","type":"bytes4"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"INTERFACE_ID_ERC2981","outputs":[{"internalType":"bytes4","name":"","type":"bytes4"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"INTERFACE_ID_ERC721","outputs":[{"internalType":"bytes4","name":"","type":"bytes4"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"MAGIC_VALUE_EIP1271","outputs":[{"internalType":"bytes4","name":"","type":"bytes4"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"STANDARD_ROYALTY_FEE","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"TRANSFER_MANAGER_ERC1155","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"TRANSFER_MANAGER_ERC721","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"bool","name":"isOrderAsk","type":"bool"},{"internalType":"address","name":"signer","type":"address"},{"internalType":"address","name":"collection","type":"address"},{"internalType":"uint256","name":"price","type":"uint256"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"strategy","type":"address"},{"internalType":"address","name":"currency","type":"address"},{"internalType":"uint256","name":"nonce","type":"uint256"},{"internalType":"uint256","name":"startTime","type":"uint256"},{"internalType":"uint256","name":"endTime","type":"uint256"},{"internalType":"uint256","name":"minPercentageToAsk","type":"uint256"},{"internalType":"bytes","name":"params","type":"bytes"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"internalType":"struct OrderTypes.MakerOrder[]","name":"makerOrders","type":"tuple[]"}],"name":"checkMultipleOrderValidities","outputs":[{"internalType":"uint256[][]","name":"validationCodes","type":"uint256[][]"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"bool","name":"isOrderAsk","type":"bool"},{"internalType":"address","name":"signer","type":"address"},{"internalType":"address","name":"collection","type":"address"},{"internalType":"uint256","name":"price","type":"uint256"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"strategy","type":"address"},{"internalType":"address","name":"currency","type":"address"},{"internalType":"uint256","name":"nonce","type":"uint256"},{"internalType":"uint256","name":"startTime","type":"uint256"},{"internalType":"uint256","name":"endTime","type":"uint256"},{"internalType":"uint256","name":"minPercentageToAsk","type":"uint256"},{"internalType":"bytes","name":"params","type":"bytes"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"internalType":"struct OrderTypes.MakerOrder","name":"makerOrder","type":"tuple"}],"name":"checkOrderValidity","outputs":[{"internalType":"uint256[]","name":"validationCodes","type":"uint256[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"bool","name":"isOrderAsk","type":"bool"},{"internalType":"address","name":"signer","type":"address"},{"internalType":"address","name":"collection","type":"address"},{"internalType":"uint256","name":"price","type":"uint256"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"strategy","type":"address"},{"internalType":"address","name":"currency","type":"address"},{"internalType":"uint256","name":"nonce","type":"uint256"},{"internalType":"uint256","name":"startTime","type":"uint256"},{"internalType":"uint256","name":"endTime","type":"uint256"},{"internalType":"uint256","name":"minPercentageToAsk","type":"uint256"},{"internalType":"bytes","name":"params","type":"bytes"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"internalType":"struct OrderTypes.MakerOrder","name":"makerOrder","type":"tuple"}],"name":"checkValidityAmounts","outputs":[{"internalType":"uint256","name":"validationCode","type":"uint256"}],"stateMutability":"pure","type":"function"},{"inputs":[{"components":[{"internalType":"bool","name":"isOrderAsk","type":"bool"},{"internalType":"address","name":"signer","type":"address"},{"internalType":"address","name":"collection","type":"address"},{"internalType":"uint256","name":"price","type":"uint256"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"strategy","type":"address"},{"internalType":"address","name":"currency","type":"address"},{"internalType":"uint256","name":"nonce","type":"uint256"},{"internalType":"uint256","name":"startTime","type":"uint256"},{"internalType":"uint256","name":"endTime","type":"uint256"},{"internalType":"uint256","name":"minPercentageToAsk","type":"uint256"},{"internalType":"bytes","name":"params","type":"bytes"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"internalType":"struct OrderTypes.MakerOrder","name":"makerOrder","type":"tuple"}],"name":"checkValidityApprovalsAndBalances","outputs":[{"internalType":"uint256","name":"validationCode","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"bool","name":"isOrderAsk","type":"bool"},{"internalType":"address","name":"signer","type":"address"},{"internalType":"address","name":"collection","type":"address"},{"internalType":"uint256","name":"price","type":"uint256"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"strategy","type":"address"},{"internalType":"address","name":"currency","type":"address"},{"internalType":"uint256","name":"nonce","type":"uint256"},{"internalType":"uint256","name":"startTime","type":"uint256"},{"internalType":"uint256","name":"endTime","type":"uint256"},{"internalType":"uint256","name":"minPercentageToAsk","type":"uint256"},{"internalType":"bytes","name":"params","type":"bytes"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"internalType":"struct OrderTypes.MakerOrder","name":"makerOrder","type":"tuple"}],"name":"checkValidityMinPercentageToAsk","outputs":[{"internalType":"uint256","name":"validationCode","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"bool","name":"isOrderAsk","type":"bool"},{"internalType":"address","name":"signer","type":"address"},{"internalType":"address","name":"collection","type":"address"},{"internalType":"uint256","name":"price","type":"uint256"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"strategy","type":"address"},{"internalType":"address","name":"currency","type":"address"},{"internalType":"uint256","name":"nonce","type":"uint256"},{"internalType":"uint256","name":"startTime","type":"uint256"},{"internalType":"uint256","name":"endTime","type":"uint256"},{"internalType":"uint256","name":"minPercentageToAsk","type":"uint256"},{"internalType":"bytes","name":"params","type":"bytes"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"internalType":"struct OrderTypes.MakerOrder","name":"makerOrder","type":"tuple"}],"name":"checkValidityNonces","outputs":[{"internalType":"uint256","name":"validationCode","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"bool","name":"isOrderAsk","type":"bool"},{"internalType":"address","name":"signer","type":"address"},{"internalType":"address","name":"collection","type":"address"},{"internalType":"uint256","name":"price","type":"uint256"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"strategy","type":"address"},{"internalType":"address","name":"currency","type":"address"},{"internalType":"uint256","name":"nonce","type":"uint256"},{"internalType":"uint256","name":"startTime","type":"uint256"},{"internalType":"uint256","name":"endTime","type":"uint256"},{"internalType":"uint256","name":"minPercentageToAsk","type":"uint256"},{"internalType":"bytes","name":"params","type":"bytes"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"internalType":"struct OrderTypes.MakerOrder","name":"makerOrder","type":"tuple"}],"name":"checkValiditySignature","outputs":[{"internalType":"uint256","name":"validationCode","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"bool","name":"isOrderAsk","type":"bool"},{"internalType":"address","name":"signer","type":"address"},{"internalType":"address","name":"collection","type":"address"},{"internalType":"uint256","name":"price","type":"uint256"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"strategy","type":"address"},{"internalType":"address","name":"currency","type":"address"},{"internalType":"uint256","name":"nonce","type":"uint256"},{"internalType":"uint256","name":"startTime","type":"uint256"},{"internalType":"uint256","name":"endTime","type":"uint256"},{"internalType":"uint256","name":"minPercentageToAsk","type":"uint256"},{"internalType":"bytes","name":"params","type":"bytes"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"internalType":"struct OrderTypes.MakerOrder","name":"makerOrder","type":"tuple"}],"name":"checkValidityTimestamps","outputs":[{"internalType":"uint256","name":"validationCode","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"bool","name":"isOrderAsk","type":"bool"},{"internalType":"address","name":"signer","type":"address"},{"internalType":"address","name":"collection","type":"address"},{"internalType":"uint256","name":"price","type":"uint256"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"strategy","type":"address"},{"internalType":"address","name":"currency","type":"address"},{"internalType":"uint256","name":"nonce","type":"uint256"},{"internalType":"uint256","name":"startTime","type":"uint256"},{"internalType":"uint256","name":"endTime","type":"uint256"},{"internalType":"uint256","name":"minPercentageToAsk","type":"uint256"},{"internalType":"bytes","name":"params","type":"bytes"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"internalType":"struct OrderTypes.MakerOrder","name":"makerOrder","type":"tuple"}],"name":"checkValidityWhitelists","outputs":[{"internalType":"uint256","name":"validationCode","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"currencyManager","outputs":[{"internalType":"contract ICurrencyManager","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"executionManager","outputs":[{"internalType":"contract IExecutionManager","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"looksRareExchange","outputs":[{"internalType":"contract LooksRareExchange","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"royaltyFeeRegistry","outputs":[{"internalType":"contract IRoyaltyFeeRegistry","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"transferSelectorNFT","outputs":[{"internalType":"contract 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00000000000000000000000059728544b08ab483533076417fbbb2fd0b17ce3a

-----Decoded View---------------
Arg [0] : _looksRareExchange (address): 0x59728544B08AB483533076417FbBB2fD0B17CE3a

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 00000000000000000000000059728544b08ab483533076417fbbb2fd0b17ce3a