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Outline

•    - function _msgSender()
•    - function _msgData()
•    - function owner()
•    - function renounceOwnership()
•    - function transferOwnership(address ne ...
•    - function _transferOwnership(address n ...
•  contract MarketRegistry is Ownable
•    - function addMarket(address proxy, boo ...
•    - function setMarketStatus(uint256 mark ...
•    - function setMarketProxy(
•    - function getMarketInfo(uint256 market ...
•  contract OkxNFTMarketAggregator is ... *
•    - function init(address newOwner)
•    - function setMarketRegistry(address _m ...
•    - function trade(MarketRegistry.TradeDe ...
•    - function withdraw(address to, uint256 ...

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/**
 *Submitted for verification at Etherscan.io on 2022-05-13
*/

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)

// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

/**
 * @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() {
        _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);
    }
}

// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)

/**
 * @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;
    }
}

contract MarketRegistry is Ownable {
    struct TradeDetails {
        uint256 marketId;
        uint256 value;
        bytes32 orderHash;
        bytes tradeData;
    }

    struct Market {
        address proxy;
        bool isLib;
        bool isActive;
    }

    event NewMarketAdded(
        address indexed proxy,
        uint256 indexed marketId,
        bool isLib
    );

    event MarketStatusChanged(
        uint256 indexed marketId,
        bool indexed oldStatus,
        bool indexed newStatus
    );

    event MarketProxyChanged(
        uint256 indexed marketId,
        address indexed oldProxy,
        address indexed newProxy,
        bool oldIsLib,
        bool newIsLib
    );

    Market[] public markets;

    constructor(address[] memory proxies, bool[] memory isLibs) {
        for (uint256 i = 0; i < proxies.length; i++) {
            markets.push(Market(proxies[i], isLibs[i], true));
        }
    }

    function addMarket(address proxy, bool isLib) external onlyOwner {
        markets.push(Market(proxy, isLib, true));
        emit NewMarketAdded(proxy, markets.length - 1, isLib);
    }

    function setMarketStatus(uint256 marketId, bool newStatus)
        external
        onlyOwner
    {
        Market storage market = markets[marketId];
        emit MarketStatusChanged(marketId, market.isActive, newStatus);
        market.isActive = newStatus;
    }

    function setMarketProxy(
        uint256 marketId,
        address newProxy,
        bool isLib
    ) external onlyOwner {
        Market storage market = markets[marketId];
        emit MarketProxyChanged(
            marketId,
            market.proxy,
            newProxy,
            market.isLib,
            isLib
        );
        market.proxy = newProxy;
        market.isLib = isLib;
    }

    function getMarketInfo(uint256 marketId)
        external
        view
        returns (
            address proxy,
            bool isLib,
            bool isActive
        )
    {
        Market memory marketInfo = markets[marketId];
        proxy = marketInfo.proxy;
        isLib = marketInfo.isLib;
        isActive = marketInfo.isActive;
    }
}

contract OkxNFTMarketAggregator is Ownable, ReentrancyGuard {
    bool private _initialized;
    MarketRegistry public marketRegistry;

    event MatchOrderResults(bytes32[] orderHashes, bool[] results);

    function init(address newOwner) external {
        require(!_initialized, "Already initialized");
        _initialized = true;
        _transferOwnership(newOwner);
    }

    function setMarketRegistry(address _marketRegistry) external onlyOwner {
        marketRegistry = MarketRegistry(_marketRegistry);
    }

    function trade(MarketRegistry.TradeDetails[] memory tradeDetails)
        external
        payable
        nonReentrant
    {
        uint256 length = tradeDetails.length;
        bytes32[] memory orderHashes = new bytes32[](length);
        bool[] memory results = new bool[](length);
        uint256 giveBackValue;

        for (uint256 i; i < length; ) {
            (address proxy, bool isLib, bool isActive) = marketRegistry.markets(
                tradeDetails[i].marketId
            );
            require(isActive, "Market inactive");

            bytes memory tradeData = tradeDetails[i].tradeData;
            uint256 ethValue = tradeDetails[i].value;

            (bool success, ) = isLib
                ? proxy.delegatecall(tradeData)
                : proxy.call{value: ethValue}(tradeData);

            orderHashes[i] = tradeDetails[i].orderHash;
            results[i] = success;

            if (!success) {
                giveBackValue += ethValue;
            }

            unchecked {
                ++i;
            }
        }

        if (giveBackValue > 0) {
            (bool transfered, bytes memory reason) = msg.sender.call{
                value: giveBackValue
            }("");
            require(transfered, string(reason));
        }

        emit MatchOrderResults(orderHashes, results);
    }

    // emergency withdraw
    function withdraw(address to, uint256 amount) external onlyOwner {
        (bool success, ) = payable(to).call{value: amount}("");
        require(success, "Withdraw failed");
    }
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bytes32[]","name":"orderHashes","type":"bytes32[]"},{"indexed":false,"internalType":"bool[]","name":"results","type":"bool[]"}],"name":"MatchOrderResults","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"init","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"marketRegistry","outputs":[{"internalType":"contract MarketRegistry","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_marketRegistry","type":"address"}],"name":"setMarketRegistry","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"uint256","name":"marketId","type":"uint256"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"bytes32","name":"orderHash","type":"bytes32"},{"internalType":"bytes","name":"tradeData","type":"bytes"}],"internalType":"struct MarketRegistry.TradeDetails[]","name":"tradeDetails","type":"tuple[]"}],"name":"trade","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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