Contract Address Details

/**
* Submitted for verification at blockscout.com on 2025-04-08 15:10:34.559860Z
*/
// SPDX-License-Identifier: MIT

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);
    }

    function _verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) private 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);
            }
        }
    }
}




/**
 * @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);
}









library ArrayUtils {

    /**
     * Replace bytes in an array with bytes in another array, guarded by a bitmask
     * Efficiency of this function is a bit unpredictable because of the EVM's word-specific model (arrays under 32 bytes will be slower)
     * 
     * @dev Mask must be the size of the byte array. A nonzero byte means the byte array can be changed.
     * @param array The original array
     * @param desired The target array
     * @param mask The mask specifying which bits can be changed
     * return The updated byte array (the parameter will be modified inplace)
     */
    function guardedArrayReplace(bytes memory array, bytes memory desired, bytes memory mask)
        internal
        pure
    {
        require(array.length == desired.length);
        require(array.length == mask.length);

        uint words = array.length / 0x20;
        uint index = words * 0x20;
        assert(index / 0x20 == words);
        uint i;

        for (i = 0; i < words; i++) {
            /* Conceptually: array[i] = (!mask[i] && array[i]) || (mask[i] && desired[i]), bitwise in word chunks. */
            assembly {
                let commonIndex := mul(0x20, add(1, i))
                let maskValue := mload(add(mask, commonIndex))
                mstore(add(array, commonIndex), or(and(not(maskValue), mload(add(array, commonIndex))), and(maskValue, mload(add(desired, commonIndex)))))
            }
        }

        /* Deal with the last section of the byte array. */
        if (words > 0) {
            /* This overlaps with bytes already set but is still more efficient than iterating through each of the remaining bytes individually. */
            i = words;
            assembly {
                let commonIndex := mul(0x20, add(1, i))
                let maskValue := mload(add(mask, commonIndex))
                mstore(add(array, commonIndex), or(and(not(maskValue), mload(add(array, commonIndex))), and(maskValue, mload(add(desired, commonIndex)))))
            }
        } else {
            /* If the byte array is shorter than a word, we must unfortunately do the whole thing bytewise.
               (bounds checks could still probably be optimized away in assembly, but this is a rare case) */
            for (i = index; i < array.length; i++) {
                array[i] = ((mask[i] ^ 0xff) & array[i]) | (mask[i] & desired[i]);
            }
        }
    }

    /**
     * Test if two arrays are equal
     * Source: https://github.com/GNSPS/solidity-bytes-utils/blob/master/contracts/BytesLib.sol
     * 
     * @dev Arrays must be of equal length, otherwise will return false
     * @param a First array
     * @param b Second array
     * @return Whether or not all bytes in the arrays are equal
     */
    function arrayEq(bytes memory a, bytes memory b)
        internal
        pure
        returns (bool)
    {
        bool success = true;

        assembly {
            let length := mload(a)

            // if lengths don't match the arrays are not equal
            switch eq(length, mload(b))
            case 1 {
                // cb is a circuit breaker in the for loop since there's
                //  no said feature for inline assembly loops
                // cb = 1 - don't breaker
                // cb = 0 - break
                let cb := 1

                let mc := add(a, 0x20)
                let end := add(mc, length)

                for {
                    let cc := add(b, 0x20)
                // the next line is the loop condition:
                // while(uint(mc < end) + cb == 2)
                } eq(add(lt(mc, end), cb), 2) {
                    mc := add(mc, 0x20)
                    cc := add(cc, 0x20)
                } {
                    // if any of these checks fails then arrays are not equal
                    if iszero(eq(mload(mc), mload(cc))) {
                        // unsuccess:
                        success := 0
                        cb := 0
                    }
                }
            }
            default {
                // unsuccess:
                success := 0
            }
        }

        return success;
    }

    /**
     * Unsafe write byte array into a memory location
     *
     * @param index Memory location
     * @param source Byte array to write
     * @return End memory index
     */
    function unsafeWriteBytes(uint index, bytes memory source)
        internal
        pure
        returns (uint)
    {
        if (source.length > 0) {
            assembly {
                let length := mload(source)
                let end := add(source, add(0x20, length))
                let arrIndex := add(source, 0x20)
                let tempIndex := index
                for { } eq(lt(arrIndex, end), 1) {
                    arrIndex := add(arrIndex, 0x20)
                    tempIndex := add(tempIndex, 0x20)
                } {
                    mstore(tempIndex, mload(arrIndex))
                }
                index := add(index, length)
            }
        }
        return index;
    }

    /**
     * Unsafe write address into a memory location
     *
     * @param index Memory location
     * @param source Address to write
     * @return End memory index
     */
    function unsafeWriteAddress(uint index, address source)
        internal
        pure
        returns (uint)
    {
        uint conv = uint(uint160(source)) << 0x60;
        assembly {
            mstore(index, conv)
            index := add(index, 0x14)
        }
        return index;
    }

    /**
     * Unsafe write bytes32 into a memory location
     *
     * @param index Memory location
     * @param source bytes32 to write
     * @return End memory index
     */
    function unsafeWriteBytes32(uint index, bytes32 source)
        internal
        pure
        returns (uint)
    {
        assembly {
            mstore(index, source)
            index := add(index, 0x20)
        }
        return index;
    }

    /**
     * Unsafe write uint into a memory location
     *
     * @param index Memory location
     * @param source uint to write
     * @return End memory index
     */
    function unsafeWriteUint(uint index, uint source)
        internal
        pure
        returns (uint)
    {
        assembly {
            mstore(index, source)
            index := add(index, 0x20)
        }
        return index;
    }

    /**
     * Unsafe write uint8 into a memory location
     *
     * @param index Memory location
     * @param source uint8 to write
     * @return End memory index
     */
    function unsafeWriteUint8(uint index, uint8 source)
        internal
        pure
        returns (uint)
    {
        assembly {
            mstore8(index, source)
            index := add(index, 0x1)
        }
        return index;
    }

}


library Orders {

    struct Ask {
        address signer;
        address token;
        uint256 tokenId;
        uint256 amount;
        address strategy;
        address currency;
        address recipient;
        uint256 deadline;   // timestamp
        address operationalFeeRecipient;
        uint8 operationalFeePermil;    // max is 255, base is 1000, for operationalFeeRecipient
        uint8 referFeePermil; // max is 255, base is 1000, for Bid.referrer
        bytes params;
        uint256 salt; /* Order salt, used to prevent duplicate hashes. */
        uint8 v;
        bytes32 r;
        bytes32 s;
    }

    struct Bid {
        bytes32 askHash;
        address signer;
        uint256 amount;
        uint256 price;
        address recipient;
        address referrer;
        uint8 v;
        bytes32 r;
        bytes32 s;
    }
    
    /**
     * @dev Hash an order ask, returning the canonical order ask hash, without the message prefix
     * @param ask Order ask to hash
     * @return askHash Hash of order
     */
    function hash(Ask memory ask)
        internal
        pure
        returns (bytes32 askHash)
    {
        /* Unfortunately abi.encodePacked doesn't work here, stack size constraints. */
        
        // address: 0x14 (160)
        // uint256(bytes32): 0x20 (256)
        // uint8: 0x1 (1)
        // address * 6 + uint256 * 4 + uint8 * 2 + params
        uint size = (0x14 * 6) + (0x20 * 4) + 2 + ask.params.length;
        bytes memory array = new bytes(size);
        uint index;
        assembly {
            index := add(array, 0x20)
        }
        index = ArrayUtils.unsafeWriteAddress(index, ask.signer);
        index = ArrayUtils.unsafeWriteAddress(index, ask.token);
        index = ArrayUtils.unsafeWriteUint(index, ask.tokenId);
        index = ArrayUtils.unsafeWriteUint(index, ask.amount);
        index = ArrayUtils.unsafeWriteAddress(index, ask.strategy);
        index = ArrayUtils.unsafeWriteAddress(index, ask.currency);
        index = ArrayUtils.unsafeWriteAddress(index, ask.recipient);
        index = ArrayUtils.unsafeWriteUint(index, ask.deadline);
        index = ArrayUtils.unsafeWriteAddress(index, ask.operationalFeeRecipient);
        index = ArrayUtils.unsafeWriteUint8(index, ask.operationalFeePermil);
        index = ArrayUtils.unsafeWriteUint8(index, ask.referFeePermil);
        index = ArrayUtils.unsafeWriteBytes(index, ask.params);
        index = ArrayUtils.unsafeWriteUint(index, ask.salt);
        assembly {
            askHash := keccak256(add(array, 0x20), size)
        }
        return askHash;
    }

    function hash(Bid memory bid) internal pure returns (bytes32) {
        return
            keccak256(
                abi.encodePacked(bid.askHash, bid.signer, bid.amount, bid.price, bid.recipient, bid.referrer)
            );
    }
 
    
}




/**
 * @dev Interface of the Registrar.
 */
interface IRegistrar {
    /**
     * @dev updateRoyaltyFeeInfo.
     * 
     * update the `recipient` and `permit` for `token`.
     * - the max value of permit is 255, the base is 1000
     * 
     */
    function updateRoyaltyFeeInfo(address token, address recipient, uint8 permit) external returns (bool);

    /**
     * @dev Returns the `recipient` and `permit` of `token`.
     *
     */
    function royaltyFeeInfo(address token) external view returns (address recipient, uint8 permil);
    
    /**
     * @dev Emitted when `updateRoyaltyFeeInfo` called.
     *
     * Note that `value` may be zero.
     */
    event Updated(address indexed token, address indexed recipient, uint8 indexed permit, address owner);
}


// 



interface IOrderBook {
    event SubmitOrder(bytes32 indexed hash, Orders.Ask order);

    function getOrderBaseInfo(bytes32 hash)
        external
        view
        returns (
            address signer,
            address nft,
            uint256 tokenId,
            uint256 amount,
            address strategy,
            address currency,
            address recipient,
            uint256 deadline,
            address operationalFeeRecipient,
            uint8 operationalFeePermil,
            uint8 referFeePermil,
            bytes memory params
        );
        
    function getOrderExInfo(bytes32 hash) external view returns (
            uint256 salt,
            uint8 v,
            bytes32 r,
            bytes32 s
        );
    

    function submitOrder(
        address nft,
        uint256 tokenId,
        uint256 amount,
        address strategy,
        address currency,
        address recipient,
        uint256 deadline,
        address operationalFeeRecipient,// address[] memory addrs, //
        uint8[] memory permils,
        // uint8 operationalFeePermil, 
        // uint8 referFeePermil, // uint8[] memory permils, // 
        bytes memory params,
        uint256 salt
    ) external returns (bytes32 hash);
}






interface IStrategy {
    function canClaim(
        uint256 deadline,
        bytes memory params,
        address bidder,
        uint256 bidPrice,
        address bestBidder,
        uint256 bestBidPrice,
        uint256 bestBidBlock
    ) external view returns (bool);

    function canBid(
        uint256 deadline,
        bytes memory params,
        address bidder,
        uint256 bidPrice,
        address bestBidder,
        uint256 bestBidPrice,
        uint256 bestBidBlock
    ) external view returns (bool);
    
    function canCancel(
        uint256 deadline,
        bytes memory params,
        address bidder,
        uint256 bidPrice,
        address bestBidder,
        uint256 bestBidPrice,
        uint256 bestBidBlock
    ) external view returns (bool);
}






interface IBaseExchange {
    event Cancel(bytes32 indexed hash);
    event Claim(
        bytes32 indexed hash,
        address bidder,
        uint256 amount,
        uint256 price,
        address recipient,
        address referrer
    );
    event Bid(bytes32 indexed hash, address bidder, uint256 amount, uint256 price, address recipient, address referrer);
    event Withdraw(
        bytes32 indexed hash,
        uint256 amount
    );

    function DOMAIN_SEPARATOR() external view returns (bytes32);

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

    function protocolFeeInfo() external view returns (address recipient, uint8 permil);

    function royaltyFeeInfo(address nft) external view returns (address recipient, uint8 permil);

    function bestBid(bytes32 hash)
        external
        view
        returns (
            address bidder,
            uint256 amount,
            uint256 price,
            address recipient,
            address referrer,
            uint256 blockNumber
        );

    function isCancelledOrClaimed(bytes32 hash) external view returns (bool);

    function amountFilled(bytes32 hash) external view returns (uint256);

    function cancel(Orders.Ask memory order) external;
    
    function cancelByHash(bytes32 askHash) external;

    function bidByOrders(Orders.Ask memory askOrder, Orders.Bid memory bidOrder) external payable returns (bool executed);

    function bid(
        Orders.Ask memory askOrder,
        uint256 bidAmount,
        uint256 bidPrice,
        address bidRecipient,
        address bidReferrer
    ) external payable returns (bool executed);
    
     function bidByHash(
        bytes32 askHash,
        uint256 bidAmount,
        uint256 bidPrice,
        address bidRecipient,
        address bidReferrer
    ) external payable returns (bool executed);

    // for `canBid`, such as `EnglishAuction`
    function claim(Orders.Ask memory order) external payable;
    function claimByHash(bytes32 askHash) external payable;

}




/**
 * @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);
}










/**
 * @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;
}







/**
 * @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;
}










/*
 * @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;
    }
}


/**
 * @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() {
        _setOwner(_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 {
        _setOwner(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");
        _setOwner(newOwner);
    }

    function _setOwner(address newOwner) private {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}














/**
 * @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");
        }
    }
}






// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
 * now has built in overflow checking.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}





/// @title Interface for verifying contract-based account signatures
/// @notice Interface that verifies provided signature for the data
/// @dev Interface defined by EIP-1271
interface IERC1271 {
    /// @notice Returns whether the provided signature is valid for the provided data
    /// @dev MUST return the bytes4 magic value 0x1626ba7e when function passes.
    /// MUST NOT modify state (using STATICCALL for solc < 0.5, view modifier for solc > 0.5).
    /// MUST allow external calls.
    /// @param hash Hash of the data to be signed
    /// @param signature Signature byte array associated with _data
    /// @return magicValue The bytes4 magic value 0x1626ba7e
    function isValidSignature(bytes32 hash, bytes memory signature) external view returns (bytes4 magicValue);
}












/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     */
    bool private _initialized;

    /**
     * @dev Indicates that the contract is in the process of being initialized.
     */
    bool private _initializing;

    /**
     * @dev Modifier to protect an initializer function from being invoked twice.
     */
    modifier initializer() {
        require(_initializing || !_initialized, "Initializable: contract is already initialized");

        bool isTopLevelCall = !_initializing;
        if (isTopLevelCall) {
            _initializing = true;
            _initialized = true;
        }

        _;

        if (isTopLevelCall) {
            _initializing = false;
        }
    }
}


/**
 * @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 ReentrancyGuardInitializable is Initializable {
    // 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;

    function __ReentrancyGuard_init() internal initializer {
        __ReentrancyGuard_init_unchained();
    }

    function __ReentrancyGuard_init_unchained() internal initializer {
        _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 make 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, "SHOYU: REENTRANT");

        // 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;
    }
}




abstract contract BaseExchange is ReentrancyGuardInitializable, IBaseExchange, IOrderBook {
    using SafeMath for uint256;
    using SafeERC20 for IERC20;
    using Orders for Orders.Ask;
    using Orders for Orders.Bid;

    mapping(bytes32 => Orders.Ask) private _orders;

    struct BestBid {
        address bidder;
        uint256 amount;
        uint256 price;
        address recipient;
        address referrer;
        uint256 blockNumber;
    }

    mapping(bytes32 => BestBid) public override bestBid;
    mapping(bytes32 => bool) public override isCancelledOrClaimed;
    mapping(bytes32 => uint256) public override amountFilled;

    struct Fees {
        address token;
        address currency;
        address from;
        address to;
        uint256 amount;
        address operationalFeeRecipient;
        uint8 operationalFeePermil;
        address referrer;
        uint8 referFeePermil;
    }

    function __BaseNFTExchange_init() internal {
        __ReentrancyGuard_init();
    }

    function DOMAIN_SEPARATOR() public view virtual override returns (bytes32);

    function isStrategyWhitelisted(address strategy) public view virtual override returns(bool);

    function protocolFeeInfo() public view virtual override returns (address recipient, uint8 permil);
   
    function royaltyFeeInfo(address token) public view virtual override returns (address recipient, uint8 permil) {
        return (token, uint8(0));
    }

    function _transfer(
        address token,
        address from,
        address to,
        uint256 tokenId,
        uint256 amount
    ) internal virtual;

    function cancel(Orders.Ask memory order) external override {
        require(order.signer == msg.sender, "BaseExchange: FORBIDDEN");

        bytes32 hash = order.hash();
        BestBid storage best = bestBid[hash];
        require(IStrategy(order.strategy).canCancel(
                order.deadline,
                order.params,
                best.bidder,
                best.price,
                best.bidder,
                best.price,
                best.blockNumber
            ), "BaseExchange: CAN_NOT_CANCEL");

        isCancelledOrClaimed[hash] = true;

        emit Cancel(hash);
    }
    
    function cancelByHash(bytes32 askHash) external override {
        Orders.Ask memory order = _orders[askHash];
        
        require(order.signer == msg.sender, "BaseExchange: FORBIDDEN");

        require(askHash == order.hash(), "BaseExchange: HASH_NOT_MATCH");
        
        BestBid storage best = bestBid[askHash];
        require(IStrategy(order.strategy).canCancel(
            order.deadline,
            order.params,
            best.bidder,
            best.price,
            best.bidder,
            best.price,
            best.blockNumber
        ), "BaseExchange: CAN_NOT_CANCEL");

        isCancelledOrClaimed[askHash] = true;
  
        emit Cancel(askHash);
    }

    function bidByOrders(Orders.Ask memory askOrder, Orders.Bid memory bidOrder)
        external
        payable
        override
        nonReentrant
        returns (bool executed)
    {
        bytes32 askHash = askOrder.hash();
        require(askHash == bidOrder.askHash, "BaseExchange: UNMATCHED_HASH");
        require(bidOrder.signer != address(0), "BaseExchange: INVALID_SIGNER");

        _verify(bidOrder.hash(), bidOrder.signer, bidOrder.v, bidOrder.r, bidOrder.s);
        _verify(askHash, askOrder.signer, askOrder.v, askOrder.r, askOrder.s);

        return
            _bid(
                askOrder,
                askHash,
                bidOrder.signer,
                bidOrder.amount,
                bidOrder.price,
                bidOrder.recipient,
                bidOrder.referrer
            );
    }

    function bid(
        Orders.Ask memory askOrder,
        uint256 bidAmount,
        uint256 bidPrice,
        address bidRecipient,
        address bidReferrer
    ) external payable override nonReentrant returns (bool executed) {
        bytes32 askHash = askOrder.hash();
        _verify(askHash, askOrder.signer, askOrder.v, askOrder.r, askOrder.s);
        return _bid(askOrder, askHash, msg.sender, bidAmount, bidPrice, bidRecipient, bidReferrer);
    }

    function bidByHash(
        bytes32 askHash,
        uint256 bidAmount,
        uint256 bidPrice,
        address bidRecipient,
        address bidReferrer
    ) external payable override nonReentrant returns (bool executed) {
        Orders.Ask memory askOrder = _orders[askHash];
        require(askHash == askOrder.hash(), "BaseExchange: UNMATCHED_ASK_ORDER_HASH");
        return _bid(askOrder, askHash, msg.sender, bidAmount, bidPrice, bidRecipient, bidReferrer);
    }


    function _bid(
        Orders.Ask memory askOrder,
        bytes32 askHash,
        address bidder,
        uint256 bidAmount,
        uint256 bidPrice,
        address bidRecipient,
        address bidReferrer
    ) internal returns (bool executed) {
        require(bidAmount > 0, "BaseExchange: INVALID_AMOUNT");
        require(amountFilled[askHash].add(bidAmount) <= askOrder.amount, "BaseExchange: SOLD_OUT");

        _validate(askOrder, askHash);

        BestBid storage best = bestBid[askHash];
        if (IStrategy(askOrder.strategy).canClaim(
            askOrder.deadline, 
            askOrder.params, 
            bidder, 
            bidPrice,
            best.bidder,
            best.price,
            best.blockNumber)
        ) {
            amountFilled[askHash] = amountFilled[askHash].add(bidAmount);

            address recipient = askOrder.recipient;
            if (recipient == address(0)) recipient = askOrder.signer;
            Fees memory fee = Fees(askOrder.token, askOrder.currency, bidder, recipient, bidPrice * bidAmount,
                  askOrder.operationalFeeRecipient, askOrder.operationalFeePermil,
                  bidReferrer, askOrder.referFeePermil);
            require(
                _transferFeesAndFunds(fee),
                "BaseExchange: FAILED_TO_TRANSFER_FUNDS"
            );

            if (bidRecipient == address(0)) bidRecipient = bidder;
            _transfer(askOrder.token, askOrder.signer, bidRecipient, askOrder.tokenId, bidAmount);

            emit Claim(askHash, bidder, bidAmount, bidPrice, bidRecipient, bidReferrer);
            return true;
        } else {
            if (
                IStrategy(askOrder.strategy).canBid(
                    askOrder.deadline,
                    askOrder.params,
                    bidder,
                    bidPrice,
                    best.bidder,
                    best.price,
                    best.blockNumber
                )
            ) {
                best.bidder = bidder;
                best.amount = bidAmount;
                best.price = bidPrice;
                best.recipient = bidRecipient;
                best.referrer = bidReferrer;
                best.blockNumber = block.number;

                emit Bid(askHash, bidder, bidAmount, bidPrice, bidRecipient, bidReferrer);
                return false;
            }
        }
        revert("BaseExchange: FAILURE");
    }


    function claim(Orders.Ask memory askOrder) external payable override nonReentrant {
        bytes32 askHash = askOrder.hash();
        _verify(askHash, askOrder.signer, askOrder.v, askOrder.r, askOrder.s);
        
        _claim(askOrder, askHash);
    }
    
        
    function claimByHash(
        bytes32 askHash
    ) external payable override nonReentrant {
        Orders.Ask memory askOrder = _orders[askHash];
        require(askHash == askOrder.hash(), "BaseExchange: UNMATCHED_ASK_ORDER_HASH");
        
        _claim(askOrder, askHash);
    }

    function _claim(Orders.Ask memory askOrder, bytes32 askHash) internal {
        _validate(askOrder, askHash);

        BestBid memory best = bestBid[askHash];
        require(
            IStrategy(askOrder.strategy).canClaim(
                askOrder.deadline,
                askOrder.params,
                best.bidder,
                best.price,
                best.bidder,
                best.price,
                best.blockNumber
            ),
            "BaseExchange: FAILURE"
        );

        address recipient = askOrder.recipient;
        if (recipient == address(0)) recipient = askOrder.signer;
        
        isCancelledOrClaimed[askHash] = true;
        
        Fees memory fee = Fees(askOrder.token, askOrder.currency, best.bidder, recipient, best.price * best.amount,
                askOrder.operationalFeeRecipient, askOrder.operationalFeePermil,
                 best.referrer, askOrder.referFeePermil);
        require(_transferFeesAndFunds(fee), "BaseExchange: FAILED_TO_TRANSFER_FUNDS");
        
        amountFilled[askHash] = amountFilled[askHash].add(best.amount);

        address bidRecipient = best.recipient;
        if (bidRecipient == address(0)) bidRecipient = best.bidder;
        _transfer(askOrder.token, askOrder.signer, bidRecipient, askOrder.tokenId, best.amount);
                 
        delete bestBid[askHash];

        emit Claim(askHash, best.bidder, best.amount, best.price, bidRecipient, best.referrer);
        
    }

    function submitOrder(
        address nft,
        uint256 tokenId,
        uint256 amount,
        address strategy,
        address currency,
        address recipient,
        uint256 deadline,
        address operationalFeeRecipient,
        uint8[] memory permils, // operationalFeePermil, referFeePermil
        bytes memory params,
        uint256 salt
    )  external override nonReentrant returns (bytes32 hash) {
        Orders.Ask memory order =
            Orders.Ask(
                msg.sender,
                nft,
                tokenId,
                amount,
                strategy,
                currency,
                recipient,
                deadline,
                operationalFeeRecipient,
                permils[0],
                permils[1],
                params,
                salt,
                0,
                bytes32(0),
                bytes32(0)
            );
                    
        hash = order.hash();
        _orders[hash] = order;
        
        emit SubmitOrder(hash, order);
    }

    function getOrderBaseInfo(bytes32 hash)
        public 
        override
        view
        returns (
            address signer,
            address nft,
            uint256 tokenId,
            uint256 amount,
            address strategy,
            address currency,
            address recipient,
            uint256 deadline,
            address operationalFeeRecipient,
            uint8 operationalFeePermil,
            uint8 referFeePermil,
            bytes memory params
        ) {
            Orders.Ask memory ask = _orders[hash];
            return (
                ask.signer,
                ask.token,
                ask.tokenId,
                ask.amount,
                ask.strategy,
                ask.currency,
                ask.recipient,
                ask.deadline,
                ask.operationalFeeRecipient,
                ask.operationalFeePermil,
                ask.referFeePermil,
                ask.params
            );
        }
        
    function getOrderExInfo(bytes32 hash) public override view returns (
            uint256 salt,
            uint8 v,
            bytes32 r,
            bytes32 s
        ) {
            Orders.Ask memory ask = _orders[hash];
            return (
                ask.salt,
                ask.v,
                ask.r,
                ask.s
            );
        }

    function _validate(Orders.Ask memory askOrder, bytes32 askHash) internal view {
        require(!isCancelledOrClaimed[askHash], "BaseExchange: CANCELLED");

        require(askOrder.signer != address(0), "BaseExchange: INVALID_MAKER");
        require(askOrder.token != address(0), "BaseExchange: INVALID_NFT");
        require(askOrder.amount > 0, "BaseExchange: INVALID_AMOUNT");
        require(askOrder.strategy != address(0), "BaseExchange: INVALID_STRATEGY");
        // require(askOrder.currency != address(0), "BaseExchange: INVALID_CURRENCY");
        require(isStrategyWhitelisted(askOrder.strategy), "BaseExchange: STRATEGY_NOT_WHITELISTED");
    }

    function _verify(
        bytes32 hash,
        address signer,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal view {
        bytes32 digest = keccak256(abi.encodePacked("\x19\x01", DOMAIN_SEPARATOR(), hash));
        if (Address.isContract(signer)) {
            require(
                IERC1271(signer).isValidSignature(digest, abi.encodePacked(r, s, v)) == 0x1626ba7e,
                "BaseExchange: UNAUTHORIZED"
            );
        } else {
            require(ecrecover(digest, v, r, s) == signer, "BaseExchange: UNAUTHORIZED");
        }
    }

    function _transferFeesAndFunds(
        Fees memory fee
    ) internal returns (bool) {
        if (fee.currency == address(0)) {
            if (fee.amount != msg.value) {
                return false;   
            }
            
            uint256 remainder = fee.amount;
            (address protocolFeeRecipient, uint8 protocolFeePermil) = protocolFeeInfo();
            if (protocolFeeRecipient != address(0)) {
                uint256 protocolFeeAmount = (fee.amount * protocolFeePermil) / 1000;
                if (protocolFeeAmount > 0) {
                    Address.sendValue(payable(protocolFeeRecipient), protocolFeeAmount);
                    remainder -= protocolFeeAmount;
                }
            }
    
            if (fee.operationalFeeRecipient != address(0)) {
                uint256 operationalFeeAmount = (fee.amount * fee.operationalFeePermil) / 1000;
                if (operationalFeeAmount > 0) {
                    Address.sendValue(payable(fee.operationalFeeRecipient), operationalFeeAmount);
                    remainder -= operationalFeeAmount;    
                } 
            }
    
            (address royaltyFeeRecipient, uint8 royaltyFeePermil) = royaltyFeeInfo(fee.token);
            if (royaltyFeeRecipient != address(0)) {
                if (royaltyFeePermil != type(uint8).max) {
                    uint256 royaltyFeeAmount = (fee.amount * royaltyFeePermil) / 1000;
                    if (royaltyFeeAmount > 0) {
                        remainder -= royaltyFeeAmount;
                        Address.sendValue(payable(royaltyFeeRecipient), royaltyFeeAmount);
                    }
                }
            }

            if (fee.referrer != address(0)) {
                uint256 referFeeAmount = (fee.amount * fee.referFeePermil) / 1000;
                if (referFeeAmount > 0) {
                    Address.sendValue(payable(fee.referrer), referFeeAmount);
                    remainder -= referFeeAmount;    
                } 
            }

            Address.sendValue(payable(fee.to), remainder);
            return true; 
        } else {
            if (!_safeTransferFrom(fee.currency, fee.from, address(this), fee.amount)) {
                return false;
            }
    
            uint256 remainder = fee.amount;
            (address protocolFeeRecipient, uint8 protocolFeePermil) = protocolFeeInfo();
            if (protocolFeeRecipient != address(0)) {
                uint256 protocolFeeAmount = (fee.amount * protocolFeePermil) / 1000;
                if (protocolFeeAmount > 0) {
                    IERC20(fee.currency).safeTransfer(protocolFeeRecipient, protocolFeeAmount);
                    remainder -= protocolFeeAmount;
                }  
            }
    
            if (fee.operationalFeeRecipient != address(0)) {
                uint256 operationalFeeAmount = (fee.amount * fee.operationalFeePermil) / 1000;
                if (operationalFeeAmount > 0) {
                    IERC20(fee.currency).safeTransfer(fee.operationalFeeRecipient, operationalFeeAmount);
                    remainder -= operationalFeeAmount;    
                }
            }
    
            (address royaltyFeeRecipient, uint8 royaltyFeePermil) = royaltyFeeInfo(fee.token);
            if (royaltyFeeRecipient != address(0)) {
                if (royaltyFeePermil != type(uint8).max) {
                    uint256 royaltyFeeAmount = (fee.amount * royaltyFeePermil) / 1000;
                    if (royaltyFeeAmount > 0) {
                        remainder -= royaltyFeeAmount;
                        IERC20(fee.currency).safeTransfer(royaltyFeeRecipient, royaltyFeeAmount);
                    }
                }
            }
    
            if (fee.referrer != address(0)) {
                uint256 referFeeAmount = (fee.amount * fee.referFeePermil) / 1000;
                if (referFeeAmount > 0) {
                    IERC20(fee.currency).safeTransfer(fee.referrer, referFeeAmount);
                    remainder -= referFeeAmount;
                }
            }
      
    
            IERC20(fee.currency).safeTransfer(fee.to, remainder);
            return true; 
        }
    }

    function _safeTransferFrom(
        address token,
        address from,
        address to,
        uint256 value
    ) private returns (bool) {
        (bool success, bytes memory returndata) =
            token.call(abi.encodeWithSelector(IERC20(token).transferFrom.selector, from, to, value));
        return success && (returndata.length == 0 || abi.decode(returndata, (bool)));
    }
}










/**
 * @dev {Registrar} token, including:
 *
 *  - store info by verify owner
 *  - mint token ID
 */
abstract contract Registrar is Ownable, IRegistrar {
    bytes4 public constant OwnerSelector = bytes4(keccak256("owner()")); // 0x8da5cb5b
    bytes public constant OwnerData = abi.encodeWithSelector(OwnerSelector);

    mapping (address => address) private _recipients;
    mapping (address => uint8) private _permils;

    function isReceiptOwner(address owner, address target) public view returns (bool) {
        if (target == owner) {
            return true;
        }
        
        if (Address.isContract(target)) {
            // refer Address.functionStaticCall(target, OwnerData);
            // solhint-disable-next-line avoid-low-level-calls
            (bool success, bytes memory returndata) = target.staticcall(OwnerData);
            if (success) {
                address targetOwner = abi.decode(returndata, (address));
                if (targetOwner == owner) {
                    return true;
                }
            }
        }
        
        return false;
    }
    
    /**
     * @dev Throws if called by any account other than the owner of the target token and the DAO.
     */
    modifier onlyTokenOwner(address target) {
        require(isReceiptOwner(_msgSender(), target) || _msgSender() == owner(), "Registrar: caller is not the owner of target");
        _;
    }
   
    function royaltyFeeInfo(address token) public view override virtual returns (address recipient, uint8 permil) {
        return (_recipients[token], _permils[token]);
    }
    
    
    function updateRoyaltyFeeInfo(address token, address recipient, uint8 permit) override virtual onlyTokenOwner(token) public returns (bool) {
         _recipients[token] = recipient;
         _permils[token] = permit;
        
        emit Updated(token, recipient, permit, _msgSender());
        
        return true;
    }
}


contract NewNFTExchange is BaseExchange, Ownable, Registrar {
    bytes32 internal immutable _DOMAIN_SEPARATOR;
    
    address internal _protocolFeeRecipient;
    uint8 internal _protocolFeePermil; // out of 1000

    mapping(address => bool) private _isStrategyWhitelisted;

    constructor() {
        __BaseNFTExchange_init();

        uint256 chainId;
        assembly {
            chainId := chainid()
        }
        _DOMAIN_SEPARATOR = keccak256(
            abi.encode(
                keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"),
                keccak256("NewNFTExchange"),
                keccak256(bytes("1")),
                chainId,
                address(this)
            )
        );
    }

    function DOMAIN_SEPARATOR() public view override returns (bytes32) {
        return _DOMAIN_SEPARATOR;
    }

    function _transfer(
        address nft,
        address from,
        address to,
        uint256 tokenId,
        uint256 amount
    ) internal override {
        if (IERC165(nft).supportsInterface(0x80ac58cd)) {
            IERC721(nft).safeTransferFrom(from, to, tokenId);    
        } else if (IERC165(nft).supportsInterface(0xd9b67a26)) {
            IERC1155(nft).safeTransferFrom(from, to, tokenId, amount, "");
        } else {
            // revert
            revert("NewNFTExchange: unsupported token");
        }
    }

    function isStrategyWhitelisted(address strategy) public view override returns(bool) {
        return _isStrategyWhitelisted[strategy];
    }

    function setStrategyWhitelisted(address strategy, bool whitelisted) public onlyOwner {
        require(strategy != address(0), "NewNFTExchange: INVALID_SALE");

        _isStrategyWhitelisted[strategy] = whitelisted;
    }

    function protocolFeeInfo() public view override returns (address recipient, uint8 permil) {
        return (_protocolFeeRecipient, _protocolFeePermil);
    }
    
    // This function should be called by a multi-sig `owner`, not an EOA
    function setProtocolInfo(address recipient, uint8 permil) external onlyOwner {
        _protocolFeeRecipient = recipient;
        _protocolFeePermil = permil;
    }

    function royaltyFeeInfo(address token) public view override(BaseExchange, Registrar) returns (address recipient, uint8 permil) {
        return Registrar.royaltyFeeInfo(token);
    }
}

[{"type":"constructor","stateMutability":"nonpayable","inputs":[]},{"type":"event","name":"Bid","inputs":[{"type":"bytes32","name":"hash","internalType":"bytes32","indexed":true},{"type":"address","name":"bidder","internalType":"address","indexed":false},{"type":"uint256","name":"amount","internalType":"uint256","indexed":false},{"type":"uint256","name":"price","internalType":"uint256","indexed":false},{"type":"address","name":"recipient","internalType":"address","indexed":false},{"type":"address","name":"referrer","internalType":"address","indexed":false}],"anonymous":false},{"type":"event","name":"Cancel","inputs":[{"type":"bytes32","name":"hash","internalType":"bytes32","indexed":true}],"anonymous":false},{"type":"event","name":"Claim","inputs":[{"type":"bytes32","name":"hash","internalType":"bytes32","indexed":true},{"type":"address","name":"bidder","internalType":"address","indexed":false},{"type":"uint256","name":"amount","internalType":"uint256","indexed":false},{"type":"uint256","name":"price","internalType":"uint256","indexed":false},{"type":"address","name":"recipient","internalType":"address","indexed":false},{"type":"address","name":"referrer","internalType":"address","indexed":false}],"anonymous":false},{"type":"event","name":"OwnershipTransferred","inputs":[{"type":"address","name":"previousOwner","internalType":"address","indexed":true},{"type":"address","name":"newOwner","internalType":"address","indexed":true}],"anonymous":false},{"type":"event","name":"SubmitOrder","inputs":[{"type":"bytes32","name":"hash","internalType":"bytes32","indexed":true},{"type":"tuple","name":"order","internalType":"struct Orders.Ask","indexed":false,"components":[{"type":"address","name":"signer","internalType":"address"},{"type":"address","name":"token","internalType":"address"},{"type":"uint256","name":"tokenId","internalType":"uint256"},{"type":"uint256","name":"amount","internalType":"uint256"},{"type":"address","name":"strategy","internalType":"address"},{"type":"address","name":"currency","internalType":"address"},{"type":"address","name":"recipient","internalType":"address"},{"type":"uint256","name":"deadline","internalType":"uint256"},{"type":"address","name":"operationalFeeRecipient","internalType":"address"},{"type":"uint8","name":"operationalFeePermil","internalType":"uint8"},{"type":"uint8","name":"referFeePermil","internalType":"uint8"},{"type":"bytes","name":"params","internalType":"bytes"},{"type":"uint256","name":"salt","internalType":"uint256"},{"type":"uint8","name":"v","internalType":"uint8"},{"type":"bytes32","name":"r","internalType":"bytes32"},{"type":"bytes32","name":"s","internalType":"bytes32"}]}],"anonymous":false},{"type":"event","name":"Updated","inputs":[{"type":"address","name":"token","internalType":"address","indexed":true},{"type":"address","name":"recipient","internalType":"address","indexed":true},{"type":"uint8","name":"permit","internalType":"uint8","indexed":true},{"type":"address","name":"owner","internalType":"address","indexed":false}],"anonymous":false},{"type":"event","name":"Withdraw","inputs":[{"type":"bytes32","name":"hash","internalType":"bytes32","indexed":true},{"type":"uint256","name":"amount","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"function","stateMutability":"view","outputs":[{"type":"bytes32","name":"","internalType":"bytes32"}],"name":"DOMAIN_SEPARATOR","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"bytes","name":"","internalType":"bytes"}],"name":"OwnerData","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"bytes4","name":"","internalType":"bytes4"}],"name":"OwnerSelector","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"amountFilled","inputs":[{"type":"bytes32","name":"","internalType":"bytes32"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"bidder","internalType":"address"},{"type":"uint256","name":"amount","internalType":"uint256"},{"type":"uint256","name":"price","internalType":"uint256"},{"type":"address","name":"recipient","internalType":"address"},{"type":"address","name":"referrer","internalType":"address"},{"type":"uint256","name":"blockNumber","internalType":"uint256"}],"name":"bestBid","inputs":[{"type":"bytes32","name":"","internalType":"bytes32"}]},{"type":"function","stateMutability":"payable","outputs":[{"type":"bool","name":"executed","internalType":"bool"}],"name":"bid","inputs":[{"type":"tuple","name":"askOrder","internalType":"struct Orders.Ask","components":[{"type":"address","name":"signer","internalType":"address"},{"type":"address","name":"token","internalType":"address"},{"type":"uint256","name":"tokenId","internalType":"uint256"},{"type":"uint256","name":"amount","internalType":"uint256"},{"type":"address","name":"strategy","internalType":"address"},{"type":"address","name":"currency","internalType":"address"},{"type":"address","name":"recipient","internalType":"address"},{"type":"uint256","name":"deadline","internalType":"uint256"},{"type":"address","name":"operationalFeeRecipient","internalType":"address"},{"type":"uint8","name":"operationalFeePermil","internalType":"uint8"},{"type":"uint8","name":"referFeePermil","internalType":"uint8"},{"type":"bytes","name":"params","internalType":"bytes"},{"type":"uint256","name":"salt","internalType":"uint256"},{"type":"uint8","name":"v","internalType":"uint8"},{"type":"bytes32","name":"r","internalType":"bytes32"},{"type":"bytes32","name":"s","internalType":"bytes32"}]},{"type":"uint256","name":"bidAmount","internalType":"uint256"},{"type":"uint256","name":"bidPrice","internalType":"uint256"},{"type":"address","name":"bidRecipient","internalType":"address"},{"type":"address","name":"bidReferrer","internalType":"address"}]},{"type":"function","stateMutability":"payable","outputs":[{"type":"bool","name":"executed","internalType":"bool"}],"name":"bidByHash","inputs":[{"type":"bytes32","name":"askHash","internalType":"bytes32"},{"type":"uint256","name":"bidAmount","internalType":"uint256"},{"type":"uint256","name":"bidPrice","internalType":"uint256"},{"type":"address","name":"bidRecipient","internalType":"address"},{"type":"address","name":"bidReferrer","internalType":"address"}]},{"type":"function","stateMutability":"payable","outputs":[{"type":"bool","name":"executed","internalType":"bool"}],"name":"bidByOrders","inputs":[{"type":"tuple","name":"askOrder","internalType":"struct Orders.Ask","components":[{"type":"address","name":"signer","internalType":"address"},{"type":"address","name":"token","internalType":"address"},{"type":"uint256","name":"tokenId","internalType":"uint256"},{"type":"uint256","name":"amount","internalType":"uint256"},{"type":"address","name":"strategy","internalType":"address"},{"type":"address","name":"currency","internalType":"address"},{"type":"address","name":"recipient","internalType":"address"},{"type":"uint256","name":"deadline","internalType":"uint256"},{"type":"address","name":"operationalFeeRecipient","internalType":"address"},{"type":"uint8","name":"operationalFeePermil","internalType":"uint8"},{"type":"uint8","name":"referFeePermil","internalType":"uint8"},{"type":"bytes","name":"params","internalType":"bytes"},{"type":"uint256","name":"salt","internalType":"uint256"},{"type":"uint8","name":"v","internalType":"uint8"},{"type":"bytes32","name":"r","internalType":"bytes32"},{"type":"bytes32","name":"s","internalType":"bytes32"}]},{"type":"tuple","name":"bidOrder","internalType":"struct Orders.Bid","components":[{"type":"bytes32","name":"askHash","internalType":"bytes32"},{"type":"address","name":"signer","internalType":"address"},{"type":"uint256","name":"amount","internalType":"uint256"},{"type":"uint256","name":"price","internalType":"uint256"},{"type":"address","name":"recipient","internalType":"address"},{"type":"address","name":"referrer","internalType":"address"},{"type":"uint8","name":"v","internalType":"uint8"},{"type":"bytes32","name":"r","internalType":"bytes32"},{"type":"bytes32","name":"s","internalType":"bytes32"}]}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"cancel","inputs":[{"type":"tuple","name":"order","internalType":"struct Orders.Ask","components":[{"type":"address","name":"signer","internalType":"address"},{"type":"address","name":"token","internalType":"address"},{"type":"uint256","name":"tokenId","internalType":"uint256"},{"type":"uint256","name":"amount","internalType":"uint256"},{"type":"address","name":"strategy","internalType":"address"},{"type":"address","name":"currency","internalType":"address"},{"type":"address","name":"recipient","internalType":"address"},{"type":"uint256","name":"deadline","internalType":"uint256"},{"type":"address","name":"operationalFeeRecipient","internalType":"address"},{"type":"uint8","name":"operationalFeePermil","internalType":"uint8"},{"type":"uint8","name":"referFeePermil","internalType":"uint8"},{"type":"bytes","name":"params","internalType":"bytes"},{"type":"uint256","name":"salt","internalType":"uint256"},{"type":"uint8","name":"v","internalType":"uint8"},{"type":"bytes32","name":"r","internalType":"bytes32"},{"type":"bytes32","name":"s","internalType":"bytes32"}]}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"cancelByHash","inputs":[{"type":"bytes32","name":"askHash","internalType":"bytes32"}]},{"type":"function","stateMutability":"payable","outputs":[],"name":"claim","inputs":[{"type":"tuple","name":"askOrder","internalType":"struct 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