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



// SPDX-License-Identifier: MIT

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

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'
        // solhint-disable-next-line max-line-length
        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
            // solhint-disable-next-line max-line-length
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

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



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        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");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (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");

        // solhint-disable-next-line avoid-low-level-calls
        (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");

        // solhint-disable-next-line avoid-low-level-calls
        (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");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

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



// SPDX-License-Identifier: MIT

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) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

// 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: contracts/dependencies/openzeppelin/contracts/utils/structs/EnumerableSet.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Library for managing
 * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
 * types.
 *
 * Sets have the following properties:
 *
 * - Elements are added, removed, and checked for existence in constant time
 * (O(1)).
 * - Elements are enumerated in O(n). No guarantees are made on the ordering.
 *
 * ```
 * contract Example {
 *     // Add the library methods
 *     using EnumerableSet for EnumerableSet.AddressSet;
 *
 *     // Declare a set state variable
 *     EnumerableSet.AddressSet private mySet;
 * }
 * ```
 *
 * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
 * and `uint256` (`UintSet`) are supported.
 */
library EnumerableSet {
    // To implement this library for multiple types with as little code
    // repetition as possible, we write it in terms of a generic Set type with
    // bytes32 values.
    // The Set implementation uses private functions, and user-facing
    // implementations (such as AddressSet) are just wrappers around the
    // underlying Set.
    // This means that we can only create new EnumerableSets for types that fit
    // in bytes32.

    struct Set {
        // Storage of set values
        bytes32[] _values;
        // Position of the value in the `values` array, plus 1 because index 0
        // means a value is not in the set.
        mapping(bytes32 => uint256) _indexes;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function _add(Set storage set, bytes32 value) private returns (bool) {
        if (!_contains(set, value)) {
            set._values.push(value);
            // The value is stored at length-1, but we add 1 to all indexes
            // and use 0 as a sentinel value
            set._indexes[value] = set._values.length;
            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function _remove(Set storage set, bytes32 value) private returns (bool) {
        // We read and store the value's index to prevent multiple reads from the same storage slot
        uint256 valueIndex = set._indexes[value];

        if (valueIndex != 0) {
            // Equivalent to contains(set, value)
            // To delete an element from the _values array in O(1), we swap the element to delete with the last one in
            // the array, and then remove the last element (sometimes called as 'swap and pop').
            // This modifies the order of the array, as noted in {at}.

            uint256 toDeleteIndex = valueIndex - 1;
            uint256 lastIndex = set._values.length - 1;

            if (lastIndex != toDeleteIndex) {
                bytes32 lastvalue = set._values[lastIndex];

                // Move the last value to the index where the value to delete is
                set._values[toDeleteIndex] = lastvalue;
                // Update the index for the moved value
                set._indexes[lastvalue] = valueIndex; // Replace lastvalue's index to valueIndex
            }

            // Delete the slot where the moved value was stored
            set._values.pop();

            // Delete the index for the deleted slot
            delete set._indexes[value];

            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function _contains(Set storage set, bytes32 value) private view returns (bool) {
        return set._indexes[value] != 0;
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function _length(Set storage set) private view returns (uint256) {
        return set._values.length;
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function _at(Set storage set, uint256 index) private view returns (bytes32) {
        return set._values[index];
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function _values(Set storage set) private view returns (bytes32[] memory) {
        return set._values;
    }

    // Bytes32Set

    struct Bytes32Set {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _add(set._inner, value);
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _remove(set._inner, value);
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
        return _contains(set._inner, value);
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(Bytes32Set storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
        return _at(set._inner, index);
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(Bytes32Set storage set) internal view returns (bytes32[] memory) {
        return _values(set._inner);
    }

    // AddressSet

    struct AddressSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(AddressSet storage set, address value) internal returns (bool) {
        return _add(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(AddressSet storage set, address value) internal returns (bool) {
        return _remove(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(AddressSet storage set, address value) internal view returns (bool) {
        return _contains(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(AddressSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(AddressSet storage set, uint256 index) internal view returns (address) {
        return address(uint160(uint256(_at(set._inner, index))));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(AddressSet storage set) internal view returns (address[] memory) {
        bytes32[] memory store = _values(set._inner);
        address[] memory result;

        assembly {
            result := store
        }

        return result;
    }

    // UintSet

    struct UintSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(UintSet storage set, uint256 value) internal returns (bool) {
        return _add(set._inner, bytes32(value));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(UintSet storage set, uint256 value) internal returns (bool) {
        return _remove(set._inner, bytes32(value));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(UintSet storage set, uint256 value) internal view returns (bool) {
        return _contains(set._inner, bytes32(value));
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function length(UintSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(UintSet storage set, uint256 index) internal view returns (uint256) {
        return uint256(_at(set._inner, index));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(UintSet storage set) internal view returns (uint256[] memory) {
        bytes32[] memory store = _values(set._inner);
        uint256[] memory result;

        assembly {
            result := store
        }

        return result;
    }
}

// File: contracts/interfaces/aave/IAave.sol



// SPDX-License-Identifier: MIT

pragma solidity 0.8.9;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

interface AaveLendingPoolAddressesProvider {
    function getLendingPool() external view returns (address);

    function getAddress(bytes32 id) external view returns (address);
}

interface AToken is IERC20 {
    /**
     * @dev Returns the address of the incentives controller contract
     **/
    function getIncentivesController() external view returns (address);

    function mint(
        address user,
        uint256 amount,
        uint256 index
    ) external returns (bool);

    function burn(
        address user,
        address receiverOfUnderlying,
        uint256 amount,
        uint256 index
    ) external;
}

interface AaveIncentivesController {
    function getRewardsBalance(address[] calldata assets, address user) external view returns (uint256);

    function claimRewards(
        address[] calldata assets,
        uint256 amount,
        address to
    ) external returns (uint256);
}

interface AaveLendingPool {
    function deposit(
        address asset,
        uint256 amount,
        address onBehalfOf,
        uint16 referralCode
    ) external;

    function withdraw(
        address asset,
        uint256 amount,
        address to
    ) external returns (uint256);

    function flashLoan(
        address receiverAddress,
        address[] calldata assets,
        uint256[] calldata amounts,
        uint256[] calldata modes,
        address onBehalfOf,
        bytes calldata params,
        uint16 referralCode
    ) external;

    function borrow(
        address asset,
        uint256 amount,
        uint256 interestRateMode,
        uint16 referralCode,
        address onBehalfOf
    ) external;

    function repay(
        address asset,
        uint256 amount,
        uint256 rateMode,
        address onBehalfOf
    ) external;
}

interface AaveProtocolDataProvider {
    function getReserveTokensAddresses(address asset)
        external
        view
        returns (
            address aTokenAddress,
            address stableDebtTokenAddress,
            address variableDebtTokenAddress
        );

    function getReserveData(address asset)
        external
        view
        returns (
            uint256 availableLiquidity,
            uint256 totalStableDebt,
            uint256 totalVariableDebt,
            uint256 liquidityRate,
            uint256 variableBorrowRate,
            uint256 stableBorrowRate,
            uint256 averageStableBorrowRate,
            uint256 liquidityIndex,
            uint256 variableBorrowIndex,
            uint40 lastUpdateTimestamp
        );

    function getReserveConfigurationData(address asset)
        external
        view
        returns (
            uint256 decimals,
            uint256 ltv,
            uint256 liquidationThreshold,
            uint256 liquidationBonus,
            uint256 reserveFactor,
            bool usageAsCollateralEnabled,
            bool borrowingEnabled,
            bool stableBorrowRateEnabled,
            bool isActive,
            bool isFrozen
        );
}

//solhint-disable func-name-mixedcase
interface StakedAave is IERC20 {
    function claimRewards(address to, uint256 amount) external;

    function cooldown() external;

    function stake(address onBehalfOf, uint256 amount) external;

    function redeem(address to, uint256 amount) external;

    function getTotalRewardsBalance(address staker) external view returns (uint256);

    function stakersCooldowns(address staker) external view returns (uint256);

    function COOLDOWN_SECONDS() external view returns (uint256);

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

// File: contracts/interfaces/bloq/ISwapManager.sol



// SPDX-License-Identifier: MIT

pragma solidity 0.8.9;

/* solhint-disable func-name-mixedcase */

import "@uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router02.sol";

interface ISwapManager {
    event OracleCreated(address indexed _sender, address indexed _newOracle, uint256 _period);

    function N_DEX() external view returns (uint256);

    function ROUTERS(uint256 i) external view returns (IUniswapV2Router02);

    function bestOutputFixedInput(
        address _from,
        address _to,
        uint256 _amountIn
    )
        external
        view
        returns (
            address[] memory path,
            uint256 amountOut,
            uint256 rIdx
        );

    function bestPathFixedInput(
        address _from,
        address _to,
        uint256 _amountIn,
        uint256 _i
    ) external view returns (address[] memory path, uint256 amountOut);

    function bestInputFixedOutput(
        address _from,
        address _to,
        uint256 _amountOut
    )
        external
        view
        returns (
            address[] memory path,
            uint256 amountIn,
            uint256 rIdx
        );

    function bestPathFixedOutput(
        address _from,
        address _to,
        uint256 _amountOut,
        uint256 _i
    ) external view returns (address[] memory path, uint256 amountIn);

    function safeGetAmountsOut(
        uint256 _amountIn,
        address[] memory _path,
        uint256 _i
    ) external view returns (uint256[] memory result);

    function unsafeGetAmountsOut(
        uint256 _amountIn,
        address[] memory _path,
        uint256 _i
    ) external view returns (uint256[] memory result);

    function safeGetAmountsIn(
        uint256 _amountOut,
        address[] memory _path,
        uint256 _i
    ) external view returns (uint256[] memory result);

    function unsafeGetAmountsIn(
        uint256 _amountOut,
        address[] memory _path,
        uint256 _i
    ) external view returns (uint256[] memory result);

    function comparePathsFixedInput(
        address[] memory pathA,
        address[] memory pathB,
        uint256 _amountIn,
        uint256 _i
    ) external view returns (address[] memory path, uint256 amountOut);

    function comparePathsFixedOutput(
        address[] memory pathA,
        address[] memory pathB,
        uint256 _amountOut,
        uint256 _i
    ) external view returns (address[] memory path, uint256 amountIn);

    function ours(address a) external view returns (bool);

    function oracleCount() external view returns (uint256);

    function oracleAt(uint256 idx) external view returns (address);

    function getOracle(
        address _tokenA,
        address _tokenB,
        uint256 _period,
        uint256 _i
    ) external view returns (address);

    function createOrUpdateOracle(
        address _tokenA,
        address _tokenB,
        uint256 _period,
        uint256 _i
    ) external returns (address oracleAddr);

    function consultForFree(
        address _from,
        address _to,
        uint256 _amountIn,
        uint256 _period,
        uint256 _i
    ) external view returns (uint256 amountOut, uint256 lastUpdatedAt);

    /// get the data we want and pay the gas to update
    function consult(
        address _from,
        address _to,
        uint256 _amountIn,
        uint256 _period,
        uint256 _i
    )
        external
        returns (
            uint256 amountOut,
            uint256 lastUpdatedAt,
            bool updated
        );

    function updateOracles() external returns (uint256 updated, uint256 expected);

    function updateOracles(address[] memory _oracleAddrs) external returns (uint256 updated, uint256 expected);
}

// File: contracts/interfaces/compound/ICompound.sol



// SPDX-License-Identifier: MIT

pragma solidity 0.8.9;

interface CToken {
    function accrueInterest() external returns (uint256);

    function balanceOf(address owner) external view returns (uint256);

    function balanceOfUnderlying(address owner) external returns (uint256);

    function borrowBalanceCurrent(address account) external returns (uint256);

    function borrowBalanceStored(address account) external view returns (uint256);

    function exchangeRateCurrent() external returns (uint256);

    function exchangeRateStored() external view returns (uint256);

    function getAccountSnapshot(address account)
        external
        view
        returns (
            uint256,
            uint256,
            uint256,
            uint256
        );

    function borrow(uint256 borrowAmount) external returns (uint256);

    function mint() external payable; // For ETH

    function mint(uint256 mintAmount) external returns (uint256); // For ERC20

    function redeem(uint256 redeemTokens) external returns (uint256);

    function redeemUnderlying(uint256 redeemAmount) external returns (uint256);

    function repayBorrow() external payable; // For ETH

    function repayBorrow(uint256 repayAmount) external returns (uint256); // For ERC20

    function transfer(address user, uint256 amount) external returns (bool);

    function getCash() external view returns (uint256);

    function transferFrom(
        address owner,
        address user,
        uint256 amount
    ) external returns (bool);

    function underlying() external view returns (address);
}

interface Comptroller {
    function claimComp(address holder, address[] memory) external;

    function enterMarkets(address[] memory cTokens) external returns (uint256[] memory);

    function exitMarket(address cToken) external returns (uint256);

    function compAccrued(address holder) external view returns (uint256);

    function getAccountLiquidity(address account)
        external
        view
        returns (
            uint256,
            uint256,
            uint256
        );

    function markets(address market)
        external
        view
        returns (
            bool isListed,
            uint256 collateralFactorMantissa,
            bool isCompted
        );
}

// File: contracts/interfaces/rari-fuse/IComptroller.sol



// SPDX-License-Identifier: MIT

pragma solidity 0.8.9;

interface IComptroller {
    function cTokensByUnderlying(address) external view returns (address cToken);

    function rewardsDistributors(uint256 index) external view returns (address);

    function markets(address market) external view returns (bool isListed, uint256 collateralFactorMantissa);
}

interface IRariRewardDistributor {
    function rewardToken() external view returns (address);

    function compAccrued(address holder) external view returns (uint256);

    function claimRewards(address holder) external;

    function getAllMarkets() external view returns (address[] calldata);
}

// File: contracts/interfaces/rari-fuse/IFusePoolDirectory.sol



// SPDX-License-Identifier: MIT

pragma solidity 0.8.9;

interface IFusePoolDirectory {
    function pools(uint256)
        external
        view
        returns (
            string memory name,
            address creator,
            address comptroller,
            uint256 blockPosted,
            uint256 timestampPosted
        );
}

// File: contracts/interfaces/vesper/IStrategy.sol



// SPDX-License-Identifier: MIT

pragma solidity 0.8.9;

interface IStrategy {
    function rebalance() external;

    function sweepERC20(address _fromToken) external;

    function withdraw(uint256 _amount) external;

    function feeCollector() external view returns (address);

    function isReservedToken(address _token) external view returns (bool);

    function keepers() external view returns (address[] memory);

    function migrate(address _newStrategy) external;

    function token() external view returns (address);

    function totalValue() external view returns (uint256);

    function totalValueCurrent() external returns (uint256);

    function pool() external view returns (address);
}

// File: contracts/interfaces/vesper/IVesperPool.sol



// SPDX-License-Identifier: MIT

pragma solidity 0.8.9;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

interface IVesperPool is IERC20 {
    function calculateUniversalFee(uint256 _profit) external view returns (uint256 _fee);

    function deposit() external payable;

    function deposit(uint256 _share) external;

    function multiTransfer(address[] memory _recipients, uint256[] memory _amounts) external returns (bool);

    function excessDebt(address _strategy) external view returns (uint256);

    function permit(
        address,
        address,
        uint256,
        uint256,
        uint8,
        bytes32,
        bytes32
    ) external;

    function poolRewards() external returns (address);

    function reportEarning(
        uint256 _profit,
        uint256 _loss,
        uint256 _payback
    ) external;

    function reportLoss(uint256 _loss) external;

    function resetApproval() external;

    function sweepERC20(address _fromToken) external;

    function withdraw(uint256 _amount) external;

    function withdrawETH(uint256 _amount) external;

    function whitelistedWithdraw(uint256 _amount) external;

    function governor() external view returns (address);

    function keepers() external view returns (address[] memory);

    function isKeeper(address _address) external view returns (bool);

    function maintainers() external view returns (address[] memory);

    function isMaintainer(address _address) external view returns (bool);

    function pricePerShare() external view returns (uint256);

    function strategy(address _strategy)
        external
        view
        returns (
            bool _active,
            uint256 interestFeeObsolete,
            uint256 _debtRate,
            uint256 _lastRebalance,
            uint256 _totalDebt,
            uint256 _totalLoss,
            uint256 _totalProfit,
            uint256 _debtRatio,
            uint256 _externalDepositFee
        );

    function stopEverything() external view returns (bool);

    function token() external view returns (IERC20);

    function tokensHere() external view returns (uint256);

    function totalDebtOf(address _strategy) external view returns (uint256);

    function totalValue() external view returns (uint256);

    // Function to get pricePerShare from V2 pools
    function getPricePerShare() external view returns (uint256);
}

// File: contracts/strategies/Strategy.sol



// SPDX-License-Identifier: MIT

pragma solidity 0.8.9;

import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/utils/Context.sol";
import "../dependencies/openzeppelin/contracts/utils/structs/EnumerableSet.sol";
import "../interfaces/bloq/ISwapManager.sol";
import "../interfaces/vesper/IStrategy.sol";
import "../interfaces/vesper/IVesperPool.sol";

abstract contract Strategy is IStrategy, Context {
    using SafeERC20 for IERC20;
    using EnumerableSet for EnumerableSet.AddressSet;

    address internal constant ETH = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
    uint256 internal constant MAX_UINT_VALUE = type(uint256).max;

    // solhint-disable-next-line  var-name-mixedcase
    address internal WETH = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
    IERC20 public immutable collateralToken;
    address public receiptToken;
    address public immutable override pool;
    address public override feeCollector;
    ISwapManager public swapManager;

    uint256 public oraclePeriod = 3600; // 1h
    uint256 public oracleRouterIdx = 0; // Uniswap V2
    uint256 public swapSlippage = 10000; // 100% Don't use oracles by default

    EnumerableSet.AddressSet private _keepers;

    event UpdatedFeeCollector(address indexed previousFeeCollector, address indexed newFeeCollector);
    event UpdatedSwapManager(address indexed previousSwapManager, address indexed newSwapManager);
    event UpdatedSwapSlippage(uint256 oldSwapSlippage, uint256 newSwapSlippage);
    event UpdatedOracleConfig(uint256 oldPeriod, uint256 newPeriod, uint256 oldRouterIdx, uint256 newRouterIdx);

    constructor(
        address _pool,
        address _swapManager,
        address _receiptToken
    ) {
        require(_pool != address(0), "pool-address-is-zero");
        require(_swapManager != address(0), "sm-address-is-zero");
        swapManager = ISwapManager(_swapManager);
        pool = _pool;
        collateralToken = IVesperPool(_pool).token();
        receiptToken = _receiptToken;
        require(_keepers.add(_msgSender()), "add-keeper-failed");
    }

    modifier onlyGovernor() {
        require(_msgSender() == IVesperPool(pool).governor(), "caller-is-not-the-governor");
        _;
    }

    modifier onlyKeeper() {
        require(_keepers.contains(_msgSender()), "caller-is-not-a-keeper");
        _;
    }

    modifier onlyPool() {
        require(_msgSender() == pool, "caller-is-not-vesper-pool");
        _;
    }

    /**
     * @notice Add given address in keepers list.
     * @param _keeperAddress keeper address to add.
     */
    function addKeeper(address _keeperAddress) external onlyGovernor {
        require(_keepers.add(_keeperAddress), "add-keeper-failed");
    }

    /// @notice Return list of keepers
    function keepers() external view override returns (address[] memory) {
        return _keepers.values();
    }

    /**
     * @notice Migrate all asset and vault ownership,if any, to new strategy
     * @dev _beforeMigration hook can be implemented in child strategy to do extra steps.
     * @param _newStrategy Address of new strategy
     */
    function migrate(address _newStrategy) external virtual override onlyPool {
        require(_newStrategy != address(0), "new-strategy-address-is-zero");
        require(IStrategy(_newStrategy).pool() == pool, "not-valid-new-strategy");
        _beforeMigration(_newStrategy);
        IERC20(receiptToken).safeTransfer(_newStrategy, IERC20(receiptToken).balanceOf(address(this)));
        collateralToken.safeTransfer(_newStrategy, collateralToken.balanceOf(address(this)));
    }

    /**
     * @notice Remove given address from keepers list.
     * @param _keeperAddress keeper address to remove.
     */
    function removeKeeper(address _keeperAddress) external onlyGovernor {
        require(_keepers.remove(_keeperAddress), "remove-keeper-failed");
    }

    /**
     * @notice Update fee collector
     * @param _feeCollector fee collector address
     */
    function updateFeeCollector(address _feeCollector) external onlyGovernor {
        require(_feeCollector != address(0), "fee-collector-address-is-zero");
        require(_feeCollector != feeCollector, "fee-collector-is-same");
        emit UpdatedFeeCollector(feeCollector, _feeCollector);
        feeCollector = _feeCollector;
    }

    /**
     * @notice Update swap manager address
     * @param _swapManager swap manager address
     */
    function updateSwapManager(address _swapManager) external onlyGovernor {
        require(_swapManager != address(0), "sm-address-is-zero");
        require(_swapManager != address(swapManager), "sm-is-same");
        emit UpdatedSwapManager(address(swapManager), _swapManager);
        swapManager = ISwapManager(_swapManager);
    }

    function updateSwapSlippage(uint256 _newSwapSlippage) external onlyGovernor {
        require(_newSwapSlippage <= 10000, "invalid-slippage-value");
        emit UpdatedSwapSlippage(swapSlippage, _newSwapSlippage);
        swapSlippage = _newSwapSlippage;
    }

    function updateOracleConfig(uint256 _newPeriod, uint256 _newRouterIdx) external onlyGovernor {
        require(_newRouterIdx < swapManager.N_DEX(), "invalid-router-index");
        if (_newPeriod == 0) _newPeriod = oraclePeriod;
        require(_newPeriod > 59, "invalid-oracle-period");
        emit UpdatedOracleConfig(oraclePeriod, _newPeriod, oracleRouterIdx, _newRouterIdx);
        oraclePeriod = _newPeriod;
        oracleRouterIdx = _newRouterIdx;
    }

    /// @dev Approve all required tokens
    function approveToken() external onlyKeeper {
        _approveToken(0);
        _approveToken(MAX_UINT_VALUE);
    }

    function setupOracles() external onlyKeeper {
        _setupOracles();
    }

    /**
     * @dev Withdraw collateral token from lending pool.
     * @param _amount Amount of collateral token
     */
    function withdraw(uint256 _amount) external override onlyPool {
        _withdraw(_amount);
    }

    /**
     * @dev Rebalance profit, loss and investment of this strategy
     */
    function rebalance() external virtual override onlyKeeper {
        (uint256 _profit, uint256 _loss, uint256 _payback) = _generateReport();
        IVesperPool(pool).reportEarning(_profit, _loss, _payback);
        _reinvest();
    }

    /**
     * @dev sweep given token to feeCollector of strategy
     * @param _fromToken token address to sweep
     */
    function sweepERC20(address _fromToken) external override onlyKeeper {
        require(feeCollector != address(0), "fee-collector-not-set");
        require(_fromToken != address(collateralToken), "not-allowed-to-sweep-collateral");
        require(!isReservedToken(_fromToken), "not-allowed-to-sweep");
        if (_fromToken == ETH) {
            Address.sendValue(payable(feeCollector), address(this).balance);
        } else {
            uint256 _amount = IERC20(_fromToken).balanceOf(address(this));
            IERC20(_fromToken).safeTransfer(feeCollector, _amount);
        }
    }

    /// @notice Returns address of token correspond to collateral token
    function token() external view override returns (address) {
        return receiptToken;
    }

    /**
     * @notice Calculate total value of asset under management
     * @dev Report total value in collateral token
     */
    function totalValue() public view virtual override returns (uint256 _value);

    /**
     * @notice Calculate total value of asset under management (in real-time)
     * @dev Report total value in collateral token
     */
    function totalValueCurrent() external virtual override returns (uint256) {
        return totalValue();
    }

    /// @notice Check whether given token is reserved or not. Reserved tokens are not allowed to sweep.
    function isReservedToken(address _token) public view virtual override returns (bool);

    /**
     * @notice some strategy may want to prepare before doing migration.
        Example In Maker old strategy want to give vault ownership to new strategy
     * @param _newStrategy .
     */
    function _beforeMigration(address _newStrategy) internal virtual;

    /**
     *  @notice Generate report for current profit and loss. Also liquidate asset to payback
     * excess debt, if any.
     * @return _profit Calculate any realized profit and convert it to collateral, if not already.
     * @return _loss Calculate any loss that strategy has made on investment. Convert into collateral token.
     * @return _payback If strategy has any excess debt, we have to liquidate asset to payback excess debt.
     */
    function _generateReport()
        internal
        virtual
        returns (
            uint256 _profit,
            uint256 _loss,
            uint256 _payback
        )
    {
        uint256 _excessDebt = IVesperPool(pool).excessDebt(address(this));
        uint256 _totalDebt = IVesperPool(pool).totalDebtOf(address(this));
        _profit = _realizeProfit(_totalDebt);
        _loss = _realizeLoss(_totalDebt);
        _payback = _liquidate(_excessDebt);
    }

    function _calcAmtOutAfterSlippage(uint256 _amount, uint256 _slippage) internal pure returns (uint256) {
        return (_amount * (10000 - _slippage)) / (10000);
    }

    function _simpleOraclePath(address _from, address _to) internal view returns (address[] memory path) {
        if (_from == WETH || _to == WETH) {
            path = new address[](2);
            path[0] = _from;
            path[1] = _to;
        } else {
            path = new address[](3);
            path[0] = _from;
            path[1] = WETH;
            path[2] = _to;
        }
    }

    function _consultOracle(
        address _from,
        address _to,
        uint256 _amt
    ) internal returns (uint256, bool) {
        for (uint256 i = 0; i < swapManager.N_DEX(); i++) {
            (bool _success, bytes memory _returnData) =
                address(swapManager).call(
                    abi.encodePacked(swapManager.consult.selector, abi.encode(_from, _to, _amt, oraclePeriod, i))
                );
            if (_success) {
                (uint256 rate, uint256 lastUpdate, ) = abi.decode(_returnData, (uint256, uint256, bool));
                if ((lastUpdate > (block.timestamp - oraclePeriod)) && (rate != 0)) return (rate, true);
                return (0, false);
            }
        }
        return (0, false);
    }

    function _getOracleRate(address[] memory path, uint256 _amountIn) internal returns (uint256 amountOut) {
        require(path.length > 1, "invalid-oracle-path");
        amountOut = _amountIn;
        bool isValid;
        for (uint256 i = 0; i < path.length - 1; i++) {
            (amountOut, isValid) = _consultOracle(path[i], path[i + 1], amountOut);
            require(isValid, "invalid-oracle-rate");
        }
    }

    /**
     * @notice Safe swap via Uniswap / Sushiswap (better rate of the two)
     * @dev There are many scenarios when token swap via Uniswap can fail, so this
     * method will wrap Uniswap call in a 'try catch' to make it fail safe.
     * however, this method will throw minAmountOut is not met
     * @param _from address of from token
     * @param _to address of to token
     * @param _amountIn Amount to be swapped
     * @param _minAmountOut minimum amount out
     */
    function _safeSwap(
        address _from,
        address _to,
        uint256 _amountIn,
        uint256 _minAmountOut
    ) internal {
        (address[] memory path, uint256 amountOut, uint256 rIdx) =
            swapManager.bestOutputFixedInput(_from, _to, _amountIn);
        if (_minAmountOut == 0) _minAmountOut = 1;
        if (amountOut != 0) {
            swapManager.ROUTERS(rIdx).swapExactTokensForTokens(
                _amountIn,
                _minAmountOut,
                path,
                address(this),
                block.timestamp
            );
        }
    }

    // These methods can be implemented by the inheriting strategy.
    /* solhint-disable no-empty-blocks */
    function _claimRewardsAndConvertTo(address _toToken) internal virtual {}

    /**
     * @notice Set up any oracles that are needed for this strategy.
     */
    function _setupOracles() internal virtual {}

    /* solhint-enable */

    // These methods must be implemented by the inheriting strategy
    function _withdraw(uint256 _amount) internal virtual;

    function _approveToken(uint256 _amount) internal virtual;

    /**
     * @notice Withdraw collateral to payback excess debt in pool.
     * @param _excessDebt Excess debt of strategy in collateral token
     * @return _payback amount in collateral token. Usually it is equal to excess debt.
     */
    function _liquidate(uint256 _excessDebt) internal virtual returns (uint256 _payback);

    /**
     * @notice Calculate earning and withdraw/convert it into collateral token.
     * @param _totalDebt Total collateral debt of this strategy
     * @return _profit Profit in collateral token
     */
    function _realizeProfit(uint256 _totalDebt) internal virtual returns (uint256 _profit);

    /**
     * @notice Calculate loss
     * @param _totalDebt Total collateral debt of this strategy
     * @return _loss Realized loss in collateral token
     */
    function _realizeLoss(uint256 _totalDebt) internal virtual returns (uint256 _loss);

    /**
     * @notice Reinvest collateral.
     * @dev Once we file report back in pool, we might have some collateral in hand
     * which we want to reinvest aka deposit in lender/provider.
     */
    function _reinvest() internal virtual;
}

// File: contracts/strategies/compound/CompoundStrategy.sol



// SPDX-License-Identifier: MIT

pragma solidity 0.8.9;

import "../Strategy.sol";
import "../../interfaces/compound/ICompound.sol";

/// @title This strategy will deposit collateral token in Compound and earn interest.
contract CompoundStrategy is Strategy {
    using SafeERC20 for IERC20;

    // solhint-disable-next-line var-name-mixedcase
    string public NAME;
    string public constant VERSION = "4.0.0";

    CToken internal cToken;

    // solhint-disable-next-line var-name-mixedcase
    Comptroller public immutable COMPTROLLER;
    address public rewardToken;

    constructor(
        address _pool,
        address _swapManager,
        address _comptroller,
        address _rewardToken,
        address _receiptToken,
        string memory _name
    ) Strategy(_pool, _swapManager, _receiptToken) {
        require(_receiptToken != address(0), "cToken-address-is-zero");
        cToken = CToken(_receiptToken);
        swapSlippage = 10000; // disable oracles on reward swaps by default
        NAME = _name;

        // Either can be address(0), for example in Rari Strategy
        COMPTROLLER = Comptroller(_comptroller);
        rewardToken = _rewardToken;
    }

    /**
     * @notice Calculate total value using COMP accrued and cToken
     * @dev Report total value in collateral token
     */
    function totalValue() public view virtual override returns (uint256 _totalValue) {
        _totalValue = _calculateTotalValue((rewardToken != address(0)) ? _getRewardAccrued() : 0);
    }

    function totalValueCurrent() public virtual override returns (uint256 _totalValue) {
        if (rewardToken != address(0)) {
            _claimRewards();
            _totalValue = _calculateTotalValue(IERC20(rewardToken).balanceOf(address(this)));
        } else {
            _totalValue = _calculateTotalValue(0);
        }
    }

    function _calculateTotalValue(uint256 _rewardAccrued) internal view returns (uint256 _totalValue) {
        if (_rewardAccrued != 0) {
            (, _totalValue) = swapManager.bestPathFixedInput(rewardToken, address(collateralToken), _rewardAccrued, 0);
        }
        _totalValue += _convertToCollateral(cToken.balanceOf(address(this)));
    }

    function isReservedToken(address _token) public view virtual override returns (bool) {
        return _token == address(cToken) || _token == rewardToken;
    }

    /// @notice Approve all required tokens
    function _approveToken(uint256 _amount) internal virtual override {
        collateralToken.safeApprove(pool, _amount);
        collateralToken.safeApprove(address(cToken), _amount);
        if (rewardToken != address(0)) {
            for (uint256 i = 0; i < swapManager.N_DEX(); i++) {
                IERC20(rewardToken).safeApprove(address(swapManager.ROUTERS(i)), _amount);
            }
        }
    }

    //solhint-disable-next-line no-empty-blocks
    function _beforeMigration(address _newStrategy) internal virtual override {}

    /// @notice Claim comp
    function _claimRewards() internal virtual {
        address[] memory _markets = new address[](1);
        _markets[0] = address(cToken);
        COMPTROLLER.claimComp(address(this), _markets);
    }

    function _getRewardAccrued() internal view virtual returns (uint256 _rewardAccrued) {
        _rewardAccrued = COMPTROLLER.compAccrued(address(this));
    }

    /// @notice Claim COMP and convert COMP into collateral token.
    function _claimRewardsAndConvertTo(address _toToken) internal virtual override {
        if (rewardToken != address(0)) {
            _claimRewards();
            uint256 _rewardAmount = IERC20(rewardToken).balanceOf(address(this));
            if (_rewardAmount != 0) {
                uint256 minAmtOut =
                    (swapSlippage != 10000)
                        ? _calcAmtOutAfterSlippage(
                            _getOracleRate(_simpleOraclePath(rewardToken, _toToken), _rewardAmount),
                            swapSlippage
                        )
                        : 1;
                _safeSwap(rewardToken, _toToken, _rewardAmount, minAmtOut);
            }
        }
    }

    /// @notice Withdraw collateral to payback excess debt
    function _liquidate(uint256 _excessDebt) internal override returns (uint256 _payback) {
        if (_excessDebt != 0) {
            _payback = _safeWithdraw(_excessDebt);
        }
    }

    /**
     * @notice Calculate earning and withdraw it from Compound.
     * @dev Claim COMP and convert into collateral
     * @dev If somehow we got some collateral token in strategy then we want to
     *  include those in profit. That's why we used 'return' outside 'if' condition.
     * @param _totalDebt Total collateral debt of this strategy
     * @return profit in collateral token
     */
    function _realizeProfit(uint256 _totalDebt) internal virtual override returns (uint256) {
        _claimRewardsAndConvertTo(address(collateralToken));
        uint256 _collateralBalance = _convertToCollateral(cToken.balanceOf(address(this)));
        if (_collateralBalance > _totalDebt) {
            _withdrawHere(_collateralBalance - _totalDebt);
        }
        return collateralToken.balanceOf(address(this));
    }

    /**
     * @notice Calculate realized loss.
     * @return _loss Realized loss in collateral token
     */
    function _realizeLoss(uint256 _totalDebt) internal view override returns (uint256 _loss) {
        uint256 _collateralBalance = _convertToCollateral(cToken.balanceOf(address(this)));
        if (_collateralBalance < _totalDebt) {
            _loss = _totalDebt - _collateralBalance;
        }
    }

    /// @notice Deposit collateral in Compound
    function _reinvest() internal virtual override {
        uint256 _collateralBalance = collateralToken.balanceOf(address(this));
        if (_collateralBalance != 0) {
            require(cToken.mint(_collateralBalance) == 0, "deposit-to-compound-failed");
        }
    }

    /// @dev Withdraw collateral and transfer it to pool
    function _withdraw(uint256 _amount) internal override {
        _safeWithdraw(_amount);
        collateralToken.safeTransfer(pool, collateralToken.balanceOf(address(this)));
    }

    /**
     * @notice Safe withdraw will make sure to check asking amount against available amount.
     * @param _amount Amount of collateral to withdraw.
     * @return Actual collateral withdrawn
     */
    function _safeWithdraw(uint256 _amount) internal returns (uint256) {
        uint256 _collateralBalance = _convertToCollateral(cToken.balanceOf(address(this)));
        // Get available liquidity from Compound
        uint256 _availableLiquidity = cToken.getCash();
        // Get minimum of _amount and _avaialbleLiquidity
        uint256 _withdrawAmount = _amount < _availableLiquidity ? _amount : _availableLiquidity;
        // Get minimum of _withdrawAmount and _collateralBalance
        return _withdrawHere(_withdrawAmount < _collateralBalance ? _withdrawAmount : _collateralBalance);
    }

    /// @dev Withdraw collateral here. Do not transfer to pool
    function _withdrawHere(uint256 _amount) internal returns (uint256) {
        if (_amount != 0) {
            require(cToken.redeemUnderlying(_amount) == 0, "withdraw-from-compound-failed");
            _afterRedeem();
        }
        return _amount;
    }

    function _setupOracles() internal virtual override {
        if (rewardToken != address(0))
            swapManager.createOrUpdateOracle(rewardToken, WETH, oraclePeriod, oracleRouterIdx);
        if (address(collateralToken) != WETH) {
            swapManager.createOrUpdateOracle(WETH, address(collateralToken), oraclePeriod, oracleRouterIdx);
        }
    }

    /**
     * @dev Compound support ETH as collateral not WETH. This hook will take
     * care of conversion from WETH to ETH and vice versa.
     * @dev This will be used in ETH strategy only, hence empty implementation
     */
    //solhint-disable-next-line no-empty-blocks
    function _afterRedeem() internal virtual {}

    function _convertToCollateral(uint256 _cTokenAmount) internal view returns (uint256) {
        return (_cTokenAmount * cToken.exchangeRateStored()) / 1e18;
    }
}

// File: contracts/strategies/rari-fuse/RariCore.sol



// SPDX-License-Identifier: MIT

pragma solidity 0.8.9;

import "../../interfaces/aave/IAave.sol";
import "../../interfaces/rari-fuse/IComptroller.sol";
import "../compound/CompoundStrategy.sol";
import "../../interfaces/rari-fuse/IFusePoolDirectory.sol";

/// @title This library provide core operations for Rari
library RariCore {
    /**
     * @notice Gets Comptroller
     * @param _fusePoolDir address of the Fuse Pool Directory
     * @param _fusePoolId Fuse Pool ID
     */
    function getComptroller(IFusePoolDirectory _fusePoolDir, uint256 _fusePoolId)
        internal
        view
        returns (address _comptroller)
    {
        (, , _comptroller, , ) = _fusePoolDir.pools(_fusePoolId);
    }

    /**
     * @notice Gets the cToken to mint for a Fuse Pool
     * @param _fusePoolDir address of the Fuse Pool Directory
     * @param _fusePoolId Fuse Pool ID
     * @param _collateralToken address of the collateralToken
     */
    function getCTokenByUnderlying(
        IFusePoolDirectory _fusePoolDir,
        uint256 _fusePoolId,
        address _collateralToken
    ) internal view returns (address _cToken) {
        address _comptroller = getComptroller(_fusePoolDir, _fusePoolId);
        require(_comptroller != address(0), "rari-fuse-invalid-comptroller");
        _cToken = IComptroller(_comptroller).cTokensByUnderlying(_collateralToken);
        require(_cToken != address(0), "rari-fuse-invalid-ctoken");
    }

    /**
     * @notice Automatically finds rewardToken set for the current Fuse Pool
     * @param _fusePoolDir address of the Fuse Pool Directory
     * @param _fusePoolId Fuse Pool ID
     */
    function getRewardToken(IFusePoolDirectory _fusePoolDir, uint256 _fusePoolId)
        internal
        view
        returns (address _rewardDistributor, address _rewardToken)
    {
        uint256 _success;
        address _comptroller = getComptroller(_fusePoolDir, _fusePoolId);
        bytes4 _selector = IComptroller(_comptroller).rewardsDistributors.selector;

        // Low level static call to prevent revert in case the Comptroller doesn't have
        // rewardsDistributors function exposed
        // which may happen to older Fuse Pools
        uint256 _comptrollerSize;
        assembly {
            _comptrollerSize := extcodesize(_comptroller)
        }
        require(_comptrollerSize > 0, "comptroller-not-a-contract");

        assembly {
            let x := mload(0x40) // Find empty storage location using "free memory pointer"
            mstore(x, _selector) // Place signature at beginning of empty storage
            mstore(add(x, 0x04), 0) // Place first argument directly next to signature

            _success := staticcall(
                30000, // 30k gas
                _comptroller, // To addr
                x, // Inputs are stored at location x
                0x24, // Inputs are 36 bytes long
                x, // Store output over input (saves space)
                0x20
            ) // Outputs are 32 bytes long

            _rewardDistributor := mload(x) // Load the result
        }
        if (_rewardDistributor != address(0)) {
            _rewardToken = IRariRewardDistributor(_rewardDistributor).rewardToken();
        }
    }
}

// File: contracts/strategies/rari-fuse/RariFuseStrategy.sol



// SPDX-License-Identifier: MIT

pragma solidity 0.8.9;

import "./RariCore.sol";
import "../compound/CompoundStrategy.sol";
import "../../interfaces/rari-fuse/IComptroller.sol";
import "../../interfaces/rari-fuse/IFusePoolDirectory.sol";

/// @title This strategy will deposit collateral token in a Rari Fuse Pool and earn interest.
contract RariFuseStrategy is CompoundStrategy {
    using SafeERC20 for IERC20;
    using RariCore for IFusePoolDirectory;

    uint256 public fusePoolId;
    IFusePoolDirectory public immutable fusePoolDirectory;
    address public rewardDistributor;
    event FusePoolChanged(uint256 indexed newFusePoolId, address indexed oldCToken, address indexed newCToken);

    constructor(
        address _pool,
        address _swapManager,
        uint256 _fusePoolId,
        IFusePoolDirectory _fusePoolDirectory,
        string memory _name
    )
        CompoundStrategy(
            _pool,
            _swapManager,
            _fusePoolDirectory.getComptroller(_fusePoolId),
            address(0), // rewardToken
            _fusePoolDirectory.getCTokenByUnderlying(
                _fusePoolId,
                address(IVesperPool(_pool).token()) == WETH ? address(0x0) : address(IVesperPool(_pool).token())
            ),
            _name
        )
    {
        fusePoolId = _fusePoolId;
        fusePoolDirectory = _fusePoolDirectory;
        // Find and set the rewardToken from the fuse pool data
        (rewardDistributor, rewardToken) = _fusePoolDirectory.getRewardToken(_fusePoolId);
    }

    // solhint-enable no-empty-blocks

    /**
     * @notice Calculate total value using underlying token
     * @dev Report total value in collateral token
     */
    function totalValue() public view override returns (uint256 _totalValue) {
        _totalValue = _convertToCollateral(cToken.balanceOf(address(this)));
    }

    /**
     * @notice Changes the underlying Fuse Pool to a new one
     * @dev Redeems cTokens from current fuse pool and mints cTokens of new Fuse Pool
     * @param _newPoolId Fuse Pool ID
     */
    function migrateFusePool(uint256 _newPoolId) external virtual onlyGovernor {
        address _newCToken = fusePoolDirectory.getCTokenByUnderlying(_newPoolId, address(collateralToken));
        require(address(cToken) != _newCToken, "same-fuse-pool");
        require(cToken.redeem(cToken.balanceOf(address(this))) == 0, "withdraw-from-fuse-pool-failed");
        collateralToken.safeApprove(address(cToken), 0);
        // We usually do infinite approval via approveToken() any way
        collateralToken.safeApprove(_newCToken, MAX_UINT_VALUE);
        require(CToken(_newCToken).mint(collateralToken.balanceOf(address(this))) == 0, "deposit-to-fuse-pool-failed");
        emit FusePoolChanged(_newPoolId, address(cToken), _newCToken);
        cToken = CToken(_newCToken);
        receiptToken = _newCToken;
        fusePoolId = _newPoolId;
        (rewardDistributor, rewardToken) = fusePoolDirectory.getRewardToken(fusePoolId);
    }

    /// @dev Manually claim rewards from rewardDistributor by keeper
    /// @notice Properly tests if reward claim works
    function claimRewards() external onlyKeeper {
        _claimRewards();
    }

    /// @notice Claim rewards from Fuse Pool' rewardDistributor
    function _claimRewards() internal virtual override {
        IRariRewardDistributor(rewardDistributor).claimRewards(address(this));
    }

    /// @notice Get rewards accrued in Fuse Pool' rewardDistributor
    function _getRewardAccrued() internal view virtual override returns (uint256 _rewardAccrued) {
        _rewardAccrued = IRariRewardDistributor(rewardDistributor).compAccrued(address(this));
    }

    // solhint-disable-next-line
    function _beforeMigration(address _newStrategy) internal override {}
}

// File: contracts/strategies/rari-fuse/RariFuseStrategyAPE.sol



// SPDX-License-Identifier: MIT

pragma solidity 0.8.9;

import "./RariFuseStrategy.sol";

/// @title This strategy will deposit collateral token in a Rari Fuse Pool and earn interest.
contract RariFuseStrategyAPE is RariFuseStrategy {
    constructor(
        address _pool,
        address _swapManager,
        uint256 _fusePoolId,
        IFusePoolDirectory _fusePoolDirectory,
        string memory _name
    ) RariFuseStrategy(_pool, _swapManager, _fusePoolId, _fusePoolDirectory, _name) {
        oracleRouterIdx = 1;
    }
}