// File: @openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/ContextUpgradeable.sol";
import "../proxy/utils/Initializable.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 OwnableUpgradeable is Initializable, ContextUpgradeable {
    address private _owner;

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    function __Ownable_init() internal onlyInitializing {
        __Ownable_init_unchained();
    }

    function __Ownable_init_unchained() internal onlyInitializing {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

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

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling 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);
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[49] private __gap;
}

// File: @openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol)

pragma solidity ^0.8.2;

import "../../utils/AddressUpgradeable.sol";

/**
 * @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 proxied contracts do not make use of 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.
 *
 * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
 * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
 * case an upgrade adds a module that needs to be initialized.
 *
 * For example:
 *
 * [.hljs-theme-light.nopadding]
 * ```solidity
 * contract MyToken is ERC20Upgradeable {
 *     function initialize() initializer public {
 *         __ERC20_init("MyToken", "MTK");
 *     }
 * }
 *
 * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
 *     function initializeV2() reinitializer(2) public {
 *         __ERC20Permit_init("MyToken");
 *     }
 * }
 * ```
 *
 * 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.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
 * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() {
 *     _disableInitializers();
 * }
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     * @custom:oz-retyped-from bool
     */
    uint8 private _initialized;

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

    /**
     * @dev Triggered when the contract has been initialized or reinitialized.
     */
    event Initialized(uint8 version);

    /**
     * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
     * `onlyInitializing` functions can be used to initialize parent contracts.
     *
     * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a
     * constructor.
     *
     * Emits an {Initialized} event.
     */
    modifier initializer() {
        bool isTopLevelCall = !_initializing;
        require(
            (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1),
            "Initializable: contract is already initialized"
        );
        _initialized = 1;
        if (isTopLevelCall) {
            _initializing = true;
        }
        _;
        if (isTopLevelCall) {
            _initializing = false;
            emit Initialized(1);
        }
    }

    /**
     * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
     * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
     * used to initialize parent contracts.
     *
     * A reinitializer may be used after the original initialization step. This is essential to configure modules that
     * are added through upgrades and that require initialization.
     *
     * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`
     * cannot be nested. If one is invoked in the context of another, execution will revert.
     *
     * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
     * a contract, executing them in the right order is up to the developer or operator.
     *
     * WARNING: setting the version to 255 will prevent any future reinitialization.
     *
     * Emits an {Initialized} event.
     */
    modifier reinitializer(uint8 version) {
        require(!_initializing && _initialized < version, "Initializable: contract is already initialized");
        _initialized = version;
        _initializing = true;
        _;
        _initializing = false;
        emit Initialized(version);
    }

    /**
     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
     * {initializer} and {reinitializer} modifiers, directly or indirectly.
     */
    modifier onlyInitializing() {
        require(_initializing, "Initializable: contract is not initializing");
        _;
    }

    /**
     * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
     * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
     * to any version. It is recommended to use this to lock implementation contracts that are designed to be called
     * through proxies.
     *
     * Emits an {Initialized} event the first time it is successfully executed.
     */
    function _disableInitializers() internal virtual {
        require(!_initializing, "Initializable: contract is initializing");
        if (_initialized != type(uint8).max) {
            _initialized = type(uint8).max;
            emit Initialized(type(uint8).max);
        }
    }

    /**
     * @dev Returns the highest version that has been initialized. See {reinitializer}.
     */
    function _getInitializedVersion() internal view returns (uint8) {
        return _initialized;
    }

    /**
     * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.
     */
    function _isInitializing() internal view returns (bool) {
        return _initializing;
    }
}

// File: @openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library AddressUpgradeable {
    /**
     * @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
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 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://consensys.net/diligence/blog/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/v0.8.0/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 functionCallWithValue(target, data, 0, "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");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, 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) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, 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) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or 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 {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // 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
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

// File: @openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol



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

pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.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 ContextUpgradeable is Initializable {
    function __Context_init() internal onlyInitializing {
    }

    function __Context_init_unchained() internal onlyInitializing {
    }
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

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

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[50] private __gap;
}

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



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @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);

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

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



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, uint 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: APPROVE_FAILED');
    }

    function safeTransfer(address token, address to, uint 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: TRANSFER_FAILED');
    }

    function safeTransferFrom(address token, address from, address to, uint 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: TRANSFER_FROM_FAILED');
    }

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

// File: @uniswap/v2-core/contracts/interfaces/IUniswapV2Factory.sol



pragma solidity >=0.5.0;

interface IUniswapV2Factory {
    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;
}

// File: @uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router01.sol



pragma solidity >=0.6.2;

interface IUniswapV2Router01 {
    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) external pure returns (uint amountOut);
    function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) 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);
}

// File: @uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router02.sol



pragma solidity >=0.6.2;

import './IUniswapV2Router01.sol';

interface IUniswapV2Router02 is IUniswapV2Router01 {
    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: @uniswap/v2-periphery/contracts/interfaces/IWETH.sol



pragma solidity >=0.5.0;

interface IWETH {
    function deposit() external payable;
    function transfer(address to, uint value) external returns (bool);
    function withdraw(uint) external;
}

// File: contracts/EGSmartRouter.sol



// SPDX-License-Identifier: MIT

/*
  ______ _____  _____                                _____                      _     _____             _            
 |  ____/ ____|/ ____|                              / ____|                    | |   |  __ \           | |           
 | |__ | |  __| (_____      ____ _ _ __    ______  | (___  _ __ ___   __ _ _ __| |_  | |__) |___  _   _| |_ ___ _ __ 
 |  __|| | |_ |\___ \ \ /\ / / _` | '_ \  |______|  \___ \| '_ ` _ \ / _` | '__| __| |  _  // _ \| | | | __/ _ \ '__|
 | |___| |__| |____) \ V  V / (_| | |_) |           ____) | | | | | | (_| | |  | |_  | | \ \ (_) | |_| | ||  __/ |   
 |______\_____|_____/ \_/\_/ \__,_| .__/           |_____/|_| |_| |_|\__,_|_|   \__| |_|  \_\___/ \__,_|\__\___|_|   
                                  | |                                                                                
                                  |_|                                                                                

*/

pragma solidity >=0.8.17;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router02.sol";
import "@uniswap/v2-core/contracts/interfaces/IUniswapV2Factory.sol";
import "@uniswap/v2-periphery/contracts/interfaces/IWETH.sol";
import "@uniswap/lib/contracts/libraries/TransferHelper.sol";
import "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";

contract EGSmartRouter is OwnableUpgradeable {
    using TransferHelper for address;
    address public routerAddress;
    address public WETH;

    address public burnAddress;
    uint public burnFee;

    address public treasuryAddress;
    uint public treasuryFee;

    receive() external payable {}

    /**
     * @param _routerAddress address of the router
     *
     * @dev initialize the router address
     */
    function initialize(address _routerAddress) external initializer {
        require(
            _routerAddress != address(0),
            "EGSwapSmartRouter: zero address"
        );
        __Ownable_init();
        routerAddress = _routerAddress;
        WETH = IUniswapV2Router02(routerAddress).WETH();
    }

    /**
     * @param _burnAddress address of the burn wallet
     *
     * @dev set the address of the burn wallet
     */
    function setBurnAddress(address _burnAddress) external onlyOwner {
        require(_burnAddress != address(0), "EGSwapSmartRouter: zero address");
        burnAddress = _burnAddress;
    }

    /**
     * @param _treasuryAddress address of the treasury wallet
     *
     * @dev set the address of the treasury wallet
     */
    function setTreasuryAddress(address _treasuryAddress) external onlyOwner {
        require(
            _treasuryAddress != address(0),
            "EGSwapSmartRouter: zero address"
        );
        treasuryAddress = _treasuryAddress;
    }

    /**
     * @param _burnFee range [0 ~ 99999], 125 means 0.125%
     *
     * @dev set the burn fee
     */
    function setBurnFee(uint _burnFee) external onlyOwner {
        burnFee = _burnFee;
    }

    /**
     * @param _treasuryFee range [0 ~ 99999], 125 means 0.125%
     *
     * @dev set the treasury fee
     */
    function setTreasuryFee(uint _treasuryFee) external onlyOwner {
        treasuryFee = _treasuryFee;
    }

    /**
     * @param amount amount
     *
     * @dev calculate the burn amount
     */
    function calcBurnFee(uint amount) public view returns (uint) {
        return (amount * burnFee) / 100000;
    }

    /**
     * @param amount amount
     *
     * @dev calculate the treasury amount
     */
    function calcTreasuryFee(uint amount) public view returns (uint) {
        return (amount * treasuryFee) / 100000;
    }

    /**
     * @param amount amount
     *
     * @dev calculate the total fee amount (burn amount + treasury amount)
     */
    function calcRouterFee(uint amount) public view returns (uint) {
        return calcBurnFee(amount) + calcTreasuryFee(amount);
    }

    /**
     * @param token input token address for swap
     * @param amount amount of token
     * @param deadline deadline of swap
     *
     * @dev swap token to ETH and send to treasury wallet
     */
    function transferToTreasury(address token, uint amount, uint deadline) internal {
        require(amount > 0, "EGSwapSmartRouter: zero amount");
        require(
            IERC20(token).balanceOf(address(this)) >= amount,
            "EGSwapSmartRouter: insufficient balance"
        );

        token.safeApprove(routerAddress, amount);
        address[] memory path = new address[](2);
        path[0] = token;
        path[1] = WETH;
        IUniswapV2Router02(routerAddress)
            .swapExactTokensForETHSupportingFeeOnTransferTokens(
                amount,
                0,
                path,
                treasuryAddress,
                deadline
            );
    }

    /**
     * @param token output token address for swap
     * @param amount amount of ETH
     * @param deadline deadline of swap
     *
     * @dev swap ETH to token and send to burn wallet
     */
    function transferToBurn(address token, uint amount, uint deadline) internal {
        require(amount > 0, "EGSwapSmartRouter: zero amount");
        require(
            address(this).balance >= amount,
            "EGSwapSmartRouter: insufficient balance"
        );

        address[] memory path = new address[](2);
        path[0] = WETH;
        path[1] = token;
        IUniswapV2Router02(routerAddress)
            .swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(
            0,
            path,
            burnAddress,
            deadline
        );
    }

    /**
     * @param amountIn amountIn
     * @param path swap path
     *
     * @dev get amounts of swap, cut router fee from output amount
     */
    function getAmountsOut(
        uint amountIn,
        address[] calldata path
    ) public view returns (uint[] memory amounts) {
        amounts = IUniswapV2Router02(routerAddress).getAmountsOut(
            amountIn,
            path
        );
        amounts[amounts.length - 1] =
            amounts[amounts.length - 1] -
            calcRouterFee(amounts[amounts.length - 1]);
    }

    /**
     * @param amountIn amountIn
     * @param amountOutMin minium amount of the output token
     * @param path swap path
     * @param to recieve address to receive output amount
     * @param deadline deadline
     *
     * @dev swap token and cut router fee from output and send to burn and treasury wallet
     */
    function swapExactTokensForTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts) {
        amounts = getAmountsOut(amountIn, path);
        address tokenIn = path[0];
        address tokenOut = path[path.length - 1];
        uint _contractBalance = IERC20(tokenOut).balanceOf(address(this));

        tokenIn.safeTransferFrom(msg.sender, address(this), amountIn);
        tokenIn.safeApprove(routerAddress, amountIn);
        IUniswapV2Router02(routerAddress).swapExactTokensForTokens(
            amountIn,
            amountOutMin,
            path,
            address(this),
            deadline
        );

        uint _amountOut = IERC20(tokenOut).balanceOf(address(this)) -
            _contractBalance;
        tokenOut.safeTransfer(to, _amountOut - calcRouterFee(_amountOut));
        if (burnFee > 0) {
            tokenOut.safeTransfer(burnAddress, calcBurnFee(_amountOut));
        }
        if (treasuryFee > 0) {
            transferToTreasury(tokenOut, calcTreasuryFee(_amountOut), deadline);
        }
    }

    /**
     * @param amountIn amountIn
     * @param amountOutMin minium amount of the output token
     * @param path swap path
     * @param to recieve address to receive output amount
     * @param deadline deadline
     *
     * @dev swap token and cut router fee from output and send to burn and treasury wallet
     */
    function swapExactTokensForETH(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts) {
        amounts = getAmountsOut(amountIn, path);
        address tokenIn = path[0];
        uint _contractBalance = address(this).balance;

        tokenIn.safeTransferFrom(msg.sender, address(this), amountIn);
        tokenIn.safeApprove(routerAddress, amountIn);
        IUniswapV2Router02(routerAddress).swapExactTokensForETH(
            amountIn,
            amountOutMin,
            path,
            address(this),
            deadline
        );

        uint _amountOut = address(this).balance - _contractBalance;
        TransferHelper.safeTransferETH(
            to,
            _amountOut - calcRouterFee(_amountOut)
        );
        if (burnFee > 0) {
            transferToBurn(tokenIn, calcBurnFee(_amountOut), deadline);
        }
        if (treasuryFee > 0) {
            TransferHelper.safeTransferETH(
                treasuryAddress,
                calcTreasuryFee(_amountOut)
            );
        }
    }

    /**
     * @param amountOutMin minium amount of the output token
     * @param path swap path
     * @param to recieve address to receive output amount
     * @param deadline deadline
     *
     * @dev swap token and cut router fee from output and send to burn and treasury wallet
     */
    function swapExactETHForTokens(
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external payable returns (uint[] memory amounts) {
        amounts = getAmountsOut(msg.value, path);
        address tokenOut = path[path.length - 1];
        uint _contractBalance = IERC20(tokenOut).balanceOf(address(this));

        IUniswapV2Router02(routerAddress).swapExactETHForTokens{
            value: msg.value
        }(amountOutMin, path, address(this), deadline);

        uint _amountOut = IERC20(tokenOut).balanceOf(address(this)) -
            _contractBalance;
        tokenOut.safeTransfer(to, _amountOut - calcRouterFee(_amountOut));
        if (burnFee > 0) {
            tokenOut.safeTransfer(burnAddress, calcBurnFee(_amountOut));
        }
        if (treasuryFee > 0) {
            transferToTreasury(tokenOut, calcTreasuryFee(_amountOut), deadline);
        }
    }

    /**
     * @param amountOut amountOut
     * @param path swap path
     *
     * @dev get amounts of swap, cut router fee from output amount
     */
    function getAmountsIn(
        uint amountOut,
        address[] calldata path
    ) public view returns (uint[] memory amounts) {
        amounts = IUniswapV2Router02(routerAddress).getAmountsIn(
            amountOut,
            path
        );
        amounts[amounts.length - 1] =
            amounts[amounts.length - 1] -
            calcRouterFee(amounts[amounts.length - 1]);
    }

    /**
     * @param amountOut amount of the output token
     * @param amountInMax maximum amount of the input token
     * @param path swap path
     * @param to recieve address to receive output amount
     * @param deadline deadline
     *
     * @dev swap token and cut router fee from output and send to burn and treasury wallet
     */
    function swapTokensForExactTokens(
        uint amountOut,
        uint amountInMax,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts) {
        amounts = getAmountsIn(amountOut, path);
        address tokenIn = path[0];
        address tokenOut = path[path.length - 1];
        uint _contractBalance = IERC20(tokenOut).balanceOf(address(this));

        tokenIn.safeTransferFrom(msg.sender, address(this), amounts[0]);
        tokenIn.safeApprove(routerAddress, amounts[0]);
        IUniswapV2Router02(routerAddress).swapTokensForExactTokens(
            amountOut,
            amountInMax,
            path,
            address(this),
            deadline
        );

        uint _amountOut = IERC20(tokenOut).balanceOf(address(this)) -
            _contractBalance;
        tokenOut.safeTransfer(to, _amountOut - calcRouterFee(_amountOut));
        if (burnFee > 0) {
            tokenOut.safeTransfer(burnAddress, calcBurnFee(_amountOut));
        }
        if (treasuryFee > 0) {
            transferToTreasury(tokenOut, calcTreasuryFee(_amountOut), deadline);
        }
    }

    /**
     * @param amountOut amount of the output token
     * @param path swap path
     * @param to recieve address to receive output amount
     * @param deadline deadline
     *
     * @dev swap token and cut router fee from output and send to burn and treasury wallet
     */
    function swapETHForExactTokens(
        uint amountOut,
        address[] calldata path,
        address to,
        uint deadline
    ) external payable returns (uint[] memory amounts) {
        amounts = getAmountsIn(amountOut, path);
        address tokenOut = path[path.length - 1];
        uint _contractBalance = IERC20(tokenOut).balanceOf(address(this));

        IUniswapV2Router02(routerAddress).swapETHForExactTokens{
            value: msg.value
        }(amountOut, path, address(this), deadline);

        uint _amountOut = IERC20(tokenOut).balanceOf(address(this)) -
            _contractBalance;
        tokenOut.safeTransfer(to, _amountOut - calcRouterFee(_amountOut));
        if (burnFee > 0) {
            tokenOut.safeTransfer(burnAddress, calcBurnFee(_amountOut));
        }
        if (treasuryFee > 0) {
            transferToTreasury(tokenOut, calcTreasuryFee(_amountOut), deadline);
        }
        if (msg.value > amounts[0])
            TransferHelper.safeTransferETH(msg.sender, msg.value - amounts[0]); // refund dust eth, if any
    }

    /**
     * @param amountOut amount of the output token
     * @param amountInMax maximum amount of the input token
     * @param path swap path
     * @param to recieve address to receive output amount
     * @param deadline deadline
     *
     * @dev swap token and cut router fee from output and send to burn and treasury wallet
     */
    function swapTokensForExactETH(
        uint amountOut,
        uint amountInMax,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts) {
        amounts = getAmountsIn(amountOut, path);
        address tokenIn = path[0];
        uint _contractBalance = address(this).balance;

        tokenIn.safeTransferFrom(msg.sender, address(this), amounts[0]);
        tokenIn.safeApprove(routerAddress, amounts[0]);
        IUniswapV2Router02(routerAddress).swapTokensForExactETH(
            amountOut,
            amountInMax,
            path,
            address(this),
            deadline
        );

        uint _amountOut = address(this).balance - _contractBalance;
        TransferHelper.safeTransferETH(
            to,
            _amountOut - calcRouterFee(_amountOut)
        );
        if (burnFee > 0) {
            transferToBurn(tokenIn, calcBurnFee(_amountOut), deadline);
        }
        if (treasuryFee > 0) {
            TransferHelper.safeTransferETH(
                treasuryAddress,
                calcTreasuryFee(_amountOut)
            );
        }
    }

    /**
     * @param amountIn amount of the input token
     * @param amountOutMin minimum amount of the output token
     * @param path swap path
     * @param to recieve address to receive output amount
     * @param deadline deadline
     *
     * @dev swap token and cut router fee from output and send to burn and treasury wallet
     */
    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external {
        address tokenIn = path[0];
        address tokenOut = path[path.length - 1];

        uint _contractBalance = IERC20(tokenIn).balanceOf(address(this));
        tokenIn.safeTransferFrom(msg.sender, address(this), amountIn);
        uint _amountIn = IERC20(tokenIn).balanceOf(address(this)) -
            _contractBalance;

        _contractBalance = IERC20(tokenOut).balanceOf(address(this));
        tokenIn.safeApprove(routerAddress, _amountIn);
        IUniswapV2Router02(routerAddress)
            .swapExactTokensForTokensSupportingFeeOnTransferTokens(
                _amountIn,
                amountOutMin,
                path,
                address(this),
                deadline
            );

        uint _amountOut = IERC20(tokenOut).balanceOf(address(this)) -
            _contractBalance;
        tokenOut.safeTransfer(to, _amountOut - calcRouterFee(_amountOut));
        if (burnFee > 0) {
            tokenOut.safeTransfer(burnAddress, calcBurnFee(_amountOut));
        }
        if (treasuryFee > 0) {
            transferToTreasury(tokenOut, calcTreasuryFee(_amountOut), deadline);
        }
    }

    /**
     * @param amountIn amount of the input token
     * @param amountOutMin maximum amount of the output token
     * @param path swap path
     * @param to recieve address to receive output amount
     * @param deadline deadline
     *
     * @dev swap token and cut router fee from output and send to burn and treasury wallet
     */
    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external {
        address tokenIn = path[0];
        uint _contractBalance = IERC20(tokenIn).balanceOf(address(this));
        tokenIn.safeTransferFrom(msg.sender, address(this), amountIn);
        uint _amountIn = IERC20(tokenIn).balanceOf(address(this)) -
            _contractBalance;

        _contractBalance = address(this).balance;
        tokenIn.safeApprove(routerAddress, _amountIn);
        IUniswapV2Router02(routerAddress)
            .swapExactTokensForETHSupportingFeeOnTransferTokens(
                _amountIn,
                amountOutMin,
                path,
                address(this),
                deadline
            );

        uint _amountOut = address(this).balance - _contractBalance;
        TransferHelper.safeTransferETH(
            to,
            _amountOut - calcRouterFee(_amountOut)
        );
        if (burnFee > 0) {
            transferToBurn(tokenIn, calcBurnFee(_amountOut), deadline);
        }
        if (treasuryFee > 0) {
            TransferHelper.safeTransferETH(
                treasuryAddress,
                calcTreasuryFee(_amountOut)
            );
        }
    }

    /**
     * @param amountOutMin minimum amount of the output token
     * @param path swap path
     * @param to recieve address to receive output amount
     * @param deadline deadline
     *
     * @dev swap token and cut router fee from output and send to burn and treasury wallet
     */
    function swapExactETHForTokensSupportingFeeOnTransferTokens(
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external payable {
        address tokenOut = path[path.length - 1];
        uint _contractBalance = IERC20(tokenOut).balanceOf(address(this));

        IUniswapV2Router02(routerAddress)
            .swapExactETHForTokensSupportingFeeOnTransferTokens{
            value: msg.value
        }(amountOutMin, path, address(this), deadline);

        uint _amountOut = IERC20(tokenOut).balanceOf(address(this)) -
            _contractBalance;
        tokenOut.safeTransfer(to, _amountOut - calcRouterFee(_amountOut));
        if (burnFee > 0) {
            tokenOut.safeTransfer(burnAddress, calcBurnFee(_amountOut));
        }
        if (treasuryFee > 0) {
            transferToTreasury(tokenOut, calcTreasuryFee(_amountOut), deadline);
        }
    }
}