// File: contracts/SphynxOrder.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
pragma experimental ABIEncoderV2;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@uniswap/lib/contracts/libraries/TransferHelper.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@chainlink/contracts/src/v0.8/KeeperCompatible.sol";
import "./interfaces/ISphynxRouter.sol";
import "./interfaces/ISphynxFactory.sol";

contract SphynxOrder is Ownable, ReentrancyGuard, KeeperCompatible {
    using SafeERC20 for IERC20;
    struct Order {
        uint256 id;
        uint256 amountA;
        uint256 amountB;
        address tokenA;
        address tokenB;
        address user;
        uint256 expiredAt;
        address router;
        bool isCanceled;
        bool isSuccessed;
    }

    struct OrderMatchHelper {
        address tokenA;
        address tokenB;
        uint256 tokenIn;
        uint256 tokenOut;
    }

    uint256 public currentOrderId;
    mapping(uint256 => Order) public orders;
    mapping(address => uint256[]) public userOrderIds;
    mapping(address => bool) public routers;
    uint256 public staticFee = 100000000000000000; // 0.1 BNB INITIAL FEE
    uint256 public sphynxFee = 100000000000000000000; // 100 SPHYNX TOKEN INITIAL FEE
    uint256 public maxTxPoolLength = 20; // Initial max Tx Length
    address public keepersRegistry; // Keepers Registry Contract address for performUpkeep
    address public sphynxToken;
    address payable public feeWallet;
    uint256[] public activeOrderIds;

    event OrderCreated(
        uint256 id,
        uint256 amountA,
        uint256 amountB,
        address tokenA,
        address tokenB,
        address owner,
        address router
    );
    event OrderCanceled(uint256 id);
    event RouterUpdated(address router, bool value);
    event FeeUpdated(uint256 fee);
    event OrderMatched(
        uint256 id,
        address token0,
        address token1,
        uint256 amount0,
        uint256 amount1
    );
    event FeeWalletUpdated(address newWallet);
    event SphynxTokenUpdated(address newSphynx);
    event SphynxFeeUpdated(uint256 newFee);
    event MaxTxPoolUpdated(uint256 newLength);
    event KeepersRegistryUpdated(address newKeepersRegistry);

    constructor() {
        feeWallet = payable(msg.sender);
    }

    function addRouter(address _router, bool _value) external onlyOwner {
        routers[_router] = _value;
        emit RouterUpdated(_router, _value);
    }

    function updatedFee(uint256 _value) external onlyOwner {
        staticFee = _value;
        emit FeeUpdated(_value);
    }

    function updateFeeWallet(address _feeWallet) external onlyOwner {
        feeWallet = payable(_feeWallet);
        emit FeeWalletUpdated(_feeWallet);
    }

    function updateSphynxToken(address _sphynx) external onlyOwner {
        sphynxToken = _sphynx;
        emit SphynxTokenUpdated(_sphynx);
    }

    function updateSphynxFee(uint256 _newFee) external onlyOwner {
        sphynxFee = _newFee;
        emit SphynxFeeUpdated(_newFee);
    }

    function updateMaxTxPoolLength(uint256 _newLength) external onlyOwner {
        maxTxPoolLength = _newLength;
        emit MaxTxPoolUpdated(_newLength);
    }

    function updateKeepersRegistry(address _keepersRegistry)
        external
        onlyOwner
    {
        keepersRegistry = _keepersRegistry;
        emit KeepersRegistryUpdated(_keepersRegistry);
    }

    function createOrder(
        uint256 _amountA,
        uint256 _amountB,
        address _tokenA,
        address _tokenB,
        uint256 _expiredAt,
        address _router,
        bool _isSphynxFee
    ) external payable nonReentrant {
        require(routers[_router], "not-router");
        address pair = ISphynxFactory(ISphynxRouter(_router).factory()).getPair(
            _tokenA,
            _tokenB
        );
        require(pair != address(0), "pair-does-not-exist");
        require(
            msg.value >= staticFee ||
                (_isSphynxFee && sphynxToken != address(0)),
            "insuffient-fee"
        );
        if (sphynxToken != address(0) && _isSphynxFee) {
            IERC20(sphynxToken).safeTransferFrom(
                msg.sender,
                feeWallet,
                sphynxFee
            );
        } else {
            feeWallet.transfer(msg.value);
        }
        Order memory newOrder;
        newOrder.id = currentOrderId;
        newOrder.amountA = _amountA;
        newOrder.amountB = _amountB;
        newOrder.tokenA = _tokenA;
        newOrder.tokenB = _tokenB;
        newOrder.user = msg.sender;
        newOrder.router = _router;
        newOrder.expiredAt = _expiredAt;
        orders[currentOrderId] = newOrder;
        activeOrderIds.push(currentOrderId);
        userOrderIds[msg.sender].push(currentOrderId);
        emit OrderCreated(
            currentOrderId,
            _amountA,
            _amountB,
            _tokenA,
            _tokenB,
            msg.sender,
            _router
        );
        currentOrderId++;
    }

    function _removeActiveOrderId(uint256 _orderId) internal {
        bool isRemoved = false;
        for (uint256 i = 0; i < activeOrderIds.length; i++) {
            if (activeOrderIds[i] == _orderId) {
                activeOrderIds[i] = orders[activeOrderIds.length - 1].id;
                activeOrderIds.pop();
                isRemoved = true;
                break;
            }
        }
        require(isRemoved, "not-exist-on-active-order-list"); // check if removed or not
    }

    function _removeOrderIds(uint256 _orderId) internal {
        uint256 i = 0;
        for (; i < userOrderIds[msg.sender].length; i++) {
            if (userOrderIds[msg.sender][i] == _orderId) {
                userOrderIds[msg.sender][i] = orders[
                    userOrderIds[msg.sender].length - 1
                ].id;
                userOrderIds[msg.sender].pop();
                break;
            }
        }
        _removeActiveOrderId(_orderId);
    }

    function _performOrders(uint256 _orderId) internal {
        Order memory currentOrder = orders[_orderId];
        orders[_orderId].isSuccessed = true;
        address[] memory path = new address[](2);
        path[0] = currentOrder.tokenA;
        path[1] = currentOrder.tokenB;
        address creator = currentOrder.user;
        IERC20 tokenAContract = IERC20(path[0]);
        tokenAContract.safeTransferFrom(
            creator,
            address(this),
            currentOrder.amountA
        );
        ISphynxRouter router = ISphynxRouter(currentOrder.router);
        tokenAContract.approve(
            currentOrder.router,
            tokenAContract.balanceOf(address(this))
        );
        router.swapExactTokensForTokensSupportingFeeOnTransferTokens(
            tokenAContract.balanceOf(address(this)),
            0,
            path,
            creator,
            block.timestamp + 120
        );
        emit OrderMatched(
            currentOrder.id,
            currentOrder.tokenA,
            currentOrder.tokenB,
            currentOrder.amountA,
            currentOrder.amountB
        );
        _removeActiveOrderId(_orderId);
    }

    function executeOrders(
        uint256[] memory _orderIds,
        uint256 _index,
        uint256[] memory matchOrderIds,
        uint256 matchedIndex
    ) public {
        require(msg.sender == address(this), "permission-denied");
        for (uint256 i = 0; i < _index; i++) {
            _removeActiveOrderId(_orderIds[i]);
        }
        for (uint256 j = 0; j < matchedIndex; j++) {
            _performOrders(matchOrderIds[j]);
        }
    }

    function checkUpkeep(bytes calldata)
        external
        view
        override
        returns (bool upkeepNeeded, bytes memory performData)
    {
        uint256[] memory expiredOrderIds = new uint256[](activeOrderIds.length);
        uint256[] memory matchOrderIds = new uint256[](activeOrderIds.length);
        OrderMatchHelper[] memory matchHelpers = new OrderMatchHelper[](
            activeOrderIds.length
        );
        uint256 matchedIndex;
        uint256 tokenIndex;
        uint256 expiredIndex;
        for (uint256 i = 0; i < activeOrderIds.length; i++) {
            if (expiredIndex + matchedIndex > maxTxPoolLength) {
                // check if it's reach max Tx length
                break;
            }
            Order memory currentOrder = orders[activeOrderIds[i]];
            ISphynxRouter router = ISphynxRouter(currentOrder.router);
            if (currentOrder.expiredAt < block.timestamp) {
                expiredOrderIds[expiredIndex] = activeOrderIds[i];
                expiredIndex++;
                continue;
            }
            bool tokenIndexFlag = false;
            uint256 curTokenIn;
            uint256 curTokenOut;
            uint256 curTokenIndex;
            address[] memory path = new address[](2);
            path[0] = currentOrder.tokenA;
            path[1] = currentOrder.tokenB;
            for (uint256 tokenKey = 0; tokenKey < tokenIndex; tokenKey++) {
                if (
                    matchHelpers[tokenKey].tokenA == path[0] &&
                    matchHelpers[tokenKey].tokenB == path[1]
                ) {
                    tokenIndexFlag = true;
                    curTokenIn = matchHelpers[tokenKey].tokenIn;
                    curTokenOut = matchHelpers[tokenKey].tokenOut;
                    curTokenIndex = tokenKey;
                    break;
                }
            }
            if (
                IERC20(path[0]).balanceOf(currentOrder.user) >=
                currentOrder.amountA
            ) {
                if (tokenIndexFlag) {
                    uint256[] memory amountsOut = router.getAmountsOut(
                        curTokenIn + currentOrder.amountA,
                        path
                    );
                    uint256 amountOut = amountsOut[1];
                    if (amountOut > currentOrder.amountB + curTokenOut) {
                        matchOrderIds[matchedIndex] = activeOrderIds[i];
                        matchedIndex++;
                        matchHelpers[curTokenIndex].tokenIn =
                            curTokenIn +
                            currentOrder.amountA;
                        matchHelpers[curTokenIndex].tokenOut =
                            curTokenOut +
                            currentOrder.amountB;
                    }
                } else {
                    uint256[] memory amountsOut = router.getAmountsOut(
                        currentOrder.amountA,
                        path
                    );
                    uint256 amountOut = amountsOut[1];
                    if (amountOut > currentOrder.amountB) {
                        matchOrderIds[matchedIndex] = activeOrderIds[i];
                        matchedIndex++;
                        matchHelpers[tokenIndex].tokenIn = currentOrder.amountA;
                        matchHelpers[tokenIndex].tokenOut = currentOrder
                            .amountB;
                        matchHelpers[tokenIndex].tokenA = currentOrder.tokenA;
                        matchHelpers[tokenIndex].tokenB = currentOrder.tokenB;
                        tokenIndex++;
                    }
                }
            }
        }

        if (expiredIndex > 0 || matchedIndex > 0) {
            upkeepNeeded = true;
            performData = abi.encodeWithSignature(
                "executeOrders(uint256[],uint256,uint256[],uint256)",
                expiredOrderIds,
                expiredIndex,
                matchOrderIds,
                matchedIndex
            );
        }
    }

    function performUpkeep(bytes calldata performData)
        external
        override
        nonReentrant
    {
        require(msg.sender == keepersRegistry, "not-keepers-registry");
        (bool success, ) = address(this).call(performData);
        require(success, "not-success");
    }

    function cancelOrder(uint256 _orderId) external nonReentrant {
        require(orders[_orderId].user == msg.sender, "not-an-owner");
        orders[_orderId].isCanceled = true;
        _removeOrderIds(_orderId);
        emit OrderCanceled(_orderId);
    }

    function getUserOrders() external view returns (Order[] memory) {
        Order[] memory userOrders = new Order[](
            userOrderIds[msg.sender].length
        );
        uint256 orderIndex;
        for (uint256 i = 0; i < userOrderIds[msg.sender].length; i++) {
            uint256 orderId = userOrderIds[msg.sender][i];
            userOrders[orderIndex] = orders[orderId];
            orderIndex++;
        }

        return userOrders;
    }
}

// File: @openzeppelin/contracts/access/Ownable.sol



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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

// File: @openzeppelin/contracts/security/ReentrancyGuard.sol



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

pragma solidity ^0.8.0;

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

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

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

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

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

        _;

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

// File: @uniswap/lib/contracts/libraries/TransferHelper.sol



// SPDX-License-Identifier: GPL-3.0-or-later

pragma solidity >=0.6.0;

// helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false
library TransferHelper {
    function safeApprove(
        address token,
        address to,
        uint256 value
    ) internal {
        // bytes4(keccak256(bytes('approve(address,uint256)')));
        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value));
        require(
            success && (data.length == 0 || abi.decode(data, (bool))),
            'TransferHelper::safeApprove: approve failed'
        );
    }

    function safeTransfer(
        address token,
        address to,
        uint256 value
    ) internal {
        // bytes4(keccak256(bytes('transfer(address,uint256)')));
        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value));
        require(
            success && (data.length == 0 || abi.decode(data, (bool))),
            'TransferHelper::safeTransfer: transfer failed'
        );
    }

    function safeTransferFrom(
        address token,
        address from,
        address to,
        uint256 value
    ) internal {
        // bytes4(keccak256(bytes('transferFrom(address,address,uint256)')));
        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value));
        require(
            success && (data.length == 0 || abi.decode(data, (bool))),
            'TransferHelper::transferFrom: transferFrom failed'
        );
    }

    function safeTransferETH(address to, uint256 value) internal {
        (bool success, ) = to.call{value: value}(new bytes(0));
        require(success, 'TransferHelper::safeTransferETH: ETH transfer failed');
    }
}

// File: @openzeppelin/contracts/token/ERC20/IERC20.sol



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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

// File: @openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol



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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

// File: @chainlink/contracts/src/v0.8/KeeperCompatible.sol



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

import "./KeeperBase.sol";
import "./interfaces/KeeperCompatibleInterface.sol";

abstract contract KeeperCompatible is KeeperBase, KeeperCompatibleInterface {}

// File: contracts/interfaces/ISphynxRouter.sol



// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2;

import './ISphynxRouter01.sol';

interface ISphynxRouter is ISphynxRouter01 {
    function removeLiquidityETHSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountETH);
    function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountETH);

    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
    function swapExactETHForTokensSupportingFeeOnTransferTokens(
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external payable;
    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
}
// File: contracts/interfaces/ISphynxFactory.sol



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

interface ISphynxFactory {
    event PairCreated(address indexed token0, address indexed token1, address pair, uint);

    function feeTo() external view returns (address);
    function feeToSetter() external view returns (address);

    function getPair(address tokenA, address tokenB) external view returns (address pair);
    function allPairs(uint) external view returns (address pair);
    function allPairsLength() external view returns (uint);

    function createPair(address tokenA, address tokenB) external returns (address pair);

    function setFeeTo(address) external;
    function setFeeToSetter(address) external;
    function setSwapFee(address _pair, uint32 _swapFee) external;
}
// File: @openzeppelin/contracts/utils/Context.sol



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

pragma solidity ^0.8.0;

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

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

// File: @openzeppelin/contracts/utils/Address.sol



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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

// File: @chainlink/contracts/src/v0.8/KeeperBase.sol



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

contract KeeperBase {
  error OnlySimulatedBackend();

  /**
   * @notice method that allows it to be simulated via eth_call by checking that
   * the sender is the zero address.
   */
  function preventExecution() internal view {
    if (tx.origin != address(0)) {
      revert OnlySimulatedBackend();
    }
  }

  /**
   * @notice modifier that allows it to be simulated via eth_call by checking
   * that the sender is the zero address.
   */
  modifier cannotExecute() {
    preventExecution();
    _;
  }
}

// File: @chainlink/contracts/src/v0.8/interfaces/KeeperCompatibleInterface.sol



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

interface KeeperCompatibleInterface {
  /**
   * @notice method that is simulated by the keepers to see if any work actually
   * needs to be performed. This method does does not actually need to be
   * executable, and since it is only ever simulated it can consume lots of gas.
   * @dev To ensure that it is never called, you may want to add the
   * cannotExecute modifier from KeeperBase to your implementation of this
   * method.
   * @param checkData specified in the upkeep registration so it is always the
   * same for a registered upkeep. This can easilly be broken down into specific
   * arguments using `abi.decode`, so multiple upkeeps can be registered on the
   * same contract and easily differentiated by the contract.
   * @return upkeepNeeded boolean to indicate whether the keeper should call
   * performUpkeep or not.
   * @return performData bytes that the keeper should call performUpkeep with, if
   * upkeep is needed. If you would like to encode data to decode later, try
   * `abi.encode`.
   */
  function checkUpkeep(bytes calldata checkData) external returns (bool upkeepNeeded, bytes memory performData);

  /**
   * @notice method that is actually executed by the keepers, via the registry.
   * The data returned by the checkUpkeep simulation will be passed into
   * this method to actually be executed.
   * @dev The input to this method should not be trusted, and the caller of the
   * method should not even be restricted to any single registry. Anyone should
   * be able call it, and the input should be validated, there is no guarantee
   * that the data passed in is the performData returned from checkUpkeep. This
   * could happen due to malicious keepers, racing keepers, or simply a state
   * change while the performUpkeep transaction is waiting for confirmation.
   * Always validate the data passed in.
   * @param performData is the data which was passed back from the checkData
   * simulation. If it is encoded, it can easily be decoded into other types by
   * calling `abi.decode`. This data should not be trusted, and should be
   * validated against the contract's current state.
   */
  function performUpkeep(bytes calldata performData) external;
}

// File: contracts/interfaces/ISphynxRouter01.sol



// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2;

interface ISphynxRouter01 {
    function factory() external pure returns (address);
    function WETH() external pure returns (address);

    function addLiquidity(
        address tokenA,
        address tokenB,
        uint amountADesired,
        uint amountBDesired,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB, uint liquidity);
    function addLiquidityETH(
        address token,
        uint amountTokenDesired,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external payable returns (uint amountToken, uint amountETH, uint liquidity);
    function removeLiquidity(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB);
    function removeLiquidityETH(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountToken, uint amountETH);
    function removeLiquidityWithPermit(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountA, uint amountB);
    function removeLiquidityETHWithPermit(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountToken, uint amountETH);
    function swapExactTokensForTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);
    function swapTokensForExactTokens(
        uint amountOut,
        uint amountInMax,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);
    function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        payable
        returns (uint[] memory amounts);
    function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);
    function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);
    function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
        external
        payable
        returns (uint[] memory amounts);

    function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
    function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut, uint swapFee) external pure returns (uint amountOut);
    function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut, uint swapFee) external pure returns (uint amountIn);
    function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
    function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}