Contract 0x3D78F47fc07185db380ea873FE970dD096b8c922

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

import "../MasterVault/interfaces/IMasterVault.sol";
import "../ceros/interfaces/ISwapPool.sol";
import "../MasterVault/interfaces/IWETH.sol";
import "../ceros/interfaces/ICertToken.sol";
import "../ceros/interfaces/ICerosRouter.sol";
import "./BaseStrategy.sol";

contract CerosYieldConverterStrategy is BaseStrategy {

    ICerosRouter private _ceRouter;
    ICertToken private _certToken;
    IMasterVault public vault;

    address private _swapPool;

    event SwapPoolChanged(address swapPool);
    event CeRouterChanged(address ceRouter);

    /// @dev initialize function - Constructor for Upgradable contract, can be only called once during deployment
    /// @param destination Address of the ceros router contract
    /// @param feeRecipient Address of the fee recipient
    /// @param underlyingToken Address of the underlying token(wMatic)
    /// @param certToekn Address of aMATICc token
    /// @param masterVault Address of the masterVault contract
    /// @param swapPool Address of swapPool contract
    function initialize(
        address destination,
        address feeRecipient,
        address underlyingToken,
        address certToekn,
        address masterVault,
        address swapPool
    ) public initializer {
        __BaseStrategy_init(destination, feeRecipient, underlyingToken);
        _ceRouter = ICerosRouter(destination);
        _certToken = ICertToken(certToekn);
        _swapPool = swapPool;
        vault = IMasterVault(masterVault);
        underlying.approve(address(destination), type(uint256).max);
        underlying.approve(address(vault), type(uint256).max);
        _certToken.approve(_swapPool, type(uint256).max);
    }

    /**
     * Modifiers
     */
    modifier onlyVault() {
        require(msg.sender == address(vault), "!vault");
        _;
    }

    /// @dev deposits the given amount of underlying tokens into ceros
    /// @param amount amount of underlying tokens
    function deposit(uint256 amount) external onlyVault returns(uint256 value) {
        require(amount <= underlying.balanceOf(address(this)), "insufficient balance");
        return _deposit(amount);
    }

    /// @dev internal function to deposit the given amount of underlying tokens into ceros
    /// @param amount amount of underlying tokens
    function _deposit(uint256 amount) internal returns (uint256 value) {
        require(!depositPaused, "deposits are paused");
        require(amount > 0, "invalid amount");
        _beforeDeposit(amount);
        (, bool enoughLiquidity) = ISwapPool(_swapPool).getAmountOut(true, amount, false); // (amount * ratio) / 1e18
        if (enoughLiquidity) {
            return _ceRouter.depositWMatic(amount);
        }
    }

    /// @dev withdraws the given amount of underlying tokens from ceros and transfers to masterVault
    /// @param amount amount of underlying tokens
    function withdraw(uint256 amount) onlyVault external returns(uint256 value) {
        return _withdraw(amount);
    }

    /// @dev internal function to withdraw the given amount of underlying tokens from ceros
    ///      and transfers to masterVault
    /// @param amount amount of underlying tokens
    /// @return value - returns the amount of underlying tokens withdrawn from ceros
    function _withdraw(uint256 amount) internal returns (uint256 value) {
        require(amount > 0, "invalid amount");
        uint256 wethBalance = underlying.balanceOf(address(this));
        if(amount < wethBalance) {
            underlying.transfer(address(vault), amount);
            return amount;
        }
        
        (uint256 amountOut, bool enoughLiquidity) = ISwapPool(_swapPool).getAmountOut(false, ((amount - wethBalance) * _certToken.ratio()) / 1e18, false); // (amount * ratio) / 1e18
        if (enoughLiquidity) {
            value = _ceRouter.withdrawWithSlippage(address(this), amount - wethBalance, amountOut);
            require(value >= amountOut, "invalid out amount");
            uint256 withdrawAmount = wethBalance + value;
            if (amount < withdrawAmount) {
                // transfer extra funds to feeRecipient 
                underlying.transfer(feeRecipient, withdrawAmount - amount);
            } else {
                amount = withdrawAmount;
            }
            underlying.transfer(address(vault), amount);
            return amount;
        }
    }

    receive() external payable {
        require(msg.sender == address(underlying)); // only accept ETH from the WETH contract
    }

    function canDeposit(uint256 amount) public view returns(bool) {
        (,bool enoughLiquidity) = ISwapPool(_swapPool).getAmountOut(true, amount, false);
        return enoughLiquidity;
    }

    /// @dev claims yeild from ceros in aMATICc and transfers to feeRecipient
    function harvest() external onlyStrategist {
        _harvestTo(feeRecipient);
    }

    /// @dev claims yeild from ceros in aMATICc, converts them to wMATIC and transfers them to feeRecipient
    function harvestAndSwap() external onlyStrategist {
        uint256 yield = _harvestTo(address(this));
        (uint256 amountOut, bool enoughLiquidity) = ISwapPool(_swapPool).getAmountOut(false, yield, true);
        if (enoughLiquidity && amountOut > 0) {
            amountOut = ISwapPool(_swapPool).swap(false, yield, address(this));
            underlying.transfer(feeRecipient, amountOut);
        }
    }

    /// @dev internal function to claim yeild from ceros in aMATICc and transfers to desired address
    function _harvestTo(address to) private returns(uint256 yield) {
        yield = _ceRouter.getYieldFor(address(this));
        if(yield > 0) {
            yield = _ceRouter.claim(to);  // TODO: handle: reverts if no yield
        }
        uint256 profit = _ceRouter.getProfitFor(address(this));
        if(profit > 0) {
            yield += profit;
            _ceRouter.claimProfit(to);
        }
    }

    /// @dev only owner can change swap pool address
    /// @param swapPool new swap pool address
    function changeSwapPool(address swapPool) external onlyOwner {
        require(swapPool != address(0));
        _certToken.approve(_swapPool, 0);
        _swapPool = swapPool;
        _certToken.approve(_swapPool, type(uint256).max);
        emit SwapPoolChanged(swapPool);
    }

    /// @dev only owner can change ceRouter
    /// @param ceRouter new ceros router address
    function changeCeRouter(address ceRouter) external onlyOwner {
        require(ceRouter != address(0));
        underlying.approve(address(_ceRouter), 0);
        destination = ceRouter;
        _ceRouter = ICerosRouter(ceRouter);
        underlying.approve(address(_ceRouter), type(uint256).max);
        emit CeRouterChanged(ceRouter);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

// import "./IERC4626Upgradeable.sol";

interface IMasterVault {
    event DepositFeeChanged(uint256 newDepositFee);
    event MaxDepositFeeChanged(uint256 newMaxDepositFee);
    event WithdrawalFeeChanged(uint256 newWithdrawalFee);
    event MaxWithdrawalFeeChanged(uint256 newMaxWithdrawalFee);
    event ProviderChanged(address provider);
    event RouterChanged(address ceRouter);
    event ManagerAdded(address newManager);
    event ManagerRemoved(address manager);
    event FeeReceiverChanged(address feeReceiver);
    event WaitingPoolChanged(address waitingPool);
    event WaitingPoolCapChanged(uint256 cap);
    event StrategyAllocationChanged(address strategy, uint256 allocation);
    event SwapPoolChanged(address swapPool);
    event StrategyAdded(address strategy, uint256 allocation);
    event StrategyMigrated(address oldStrategy, address newStrategy, uint256 newAllocation);
    event DepositedToStrategy(address strategy, uint256 amount);
    event WithdrawnFromStrategy(address strategy, uint256 value);

    function withdrawETH(address account, uint256 amount) external  returns (uint256);
    function depositETH() external payable returns (uint256);
    function feeReceiver() external returns (address payable);
    function withdrawalFee() external view returns (uint256);
    function strategyParams(address strategy) external view returns(bool active, uint256 allocation, uint256 debt);
}

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

interface ISwapPool {
    function swap(
        bool nativeToCeros,
        uint256 amountIn,
        address receiver
    ) external returns (uint256 amountOut);
    
    function getAmountOut(
        bool nativeToCeros,
        uint amountIn,
        bool isExcludedFromFee) 
        external view returns(uint amountOut, bool enoughLiquidity);
    
    function unstakeFee() external view returns (uint24 unstakeFee);
    function stakeFee() external view returns (uint24 stakeFee);

    function FEE_MAX() external view returns (uint24 feeMax);
}

// SPDX-License-Identifier: MIT

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

pragma solidity ^0.8.0;

interface IWETH is IERC20 {
    function deposit() external payable;

    function withdraw(uint256 wad) external;
}

// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.8.0;

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

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

    function burn(address account, uint256 amount) external;

    function mint(address account, uint256 amount) external;

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

    function isRebasing() external returns (bool);

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

// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.8.0;

interface ICerosRouter {
    /**
     * Events
     */

    event Deposit(
        address indexed account,
        address indexed token,
        uint256 amount,
        uint256 profit
    );

    event Claim(
        address indexed recipient,
        address indexed token,
        uint256 amount
    );

    event Withdrawal(
        address indexed owner,
        address indexed recipient,
        address indexed token,
        uint256 amount
    );

    event ChangeVault(address vault);

    event ChangeDex(address dex);

    event ChangeDexFactory(address factory);

    event ChangeSwapPool(address pool);

    event ChangeDao(address dao);

    event ChangeCeToken(address ceToken);

    event ChangeCeTokenJoin(address ceTokenJoin);

    event ChangeCertToken(address certToken);

    event ChangeCollateralToken(address collateralToken);

    event ChangeProvider(address provider);

    event ChangePairFee(uint24 fee);

    /**
     * Methods
     */

    /**
     * Deposit
     */

    // in MATIC
    function deposit() external payable returns (uint256);

    function depositWMatic(uint256 amount) external returns (uint256);

    // // in aMATICc
    // function depositAMATICcFrom(address owner, uint256 amount)
    // external
    // returns (uint256);

    // function depositAMATICc(uint256 amount) external returns (uint256);

    /**
     * Claim
     */

    // claim in aMATICc
    function claim(address recipient) external returns (uint256);

    function claimProfit(address recipient) external;

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

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

    /**
     * Withdrawal
     */

    // MATIC
    // function withdraw(address recipient, uint256 amount)
    // external
    // returns (uint256);

    // MATIC
    // function withdrawFor(address recipient, uint256 amount)
    // external
    // returns (uint256);

    // MATIC
    function withdrawWithSlippage(
        address recipient,
        uint256 amount,
        uint256 slippage
    ) external returns (uint256);

    // // aMATICc
    // function withdrawAMATICc(address recipient, uint256 amount)
    // external
    // returns (uint256);
}

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

import "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/security/ReentrancyGuardUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/security/PausableUpgradeable.sol";
import "../MasterVault/interfaces/IWETH.sol";
import "./IBaseStrategy.sol";

abstract contract BaseStrategy is
IBaseStrategy,
OwnableUpgradeable,
PausableUpgradeable,
ReentrancyGuardUpgradeable {

    address public strategist;
    address public destination;
    address public feeRecipient;

    IWETH public underlying;

    bool public depositPaused;

    event UpdatedStrategist(address strategist);
    event UpdatedFeeRecipient(address feeRecipient);
    event UpdatedPerformanceFee(uint256 performanceFee);

    function __BaseStrategy_init(
        address destinationAddr,
        address feeRecipientAddr,
        address underlyingToken
    ) internal initializer {
        __Ownable_init();
        __Pausable_init();
        __ReentrancyGuard_init();
        strategist = msg.sender;
        destination = destinationAddr;
        feeRecipient = feeRecipientAddr;
        underlying = IWETH(underlyingToken);
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyStrategist() {
        require(msg.sender == strategist);
        _;
    }

    function _beforeDeposit(uint256 amount) internal virtual returns (bool) {
    }

    function balanceOfWant() public view returns(uint256) {
        return underlying.balanceOf(address(this));
    }

    function balanceOfPool() public view returns(uint256) {
        return underlying.balanceOf(address(destination));
    }

    function balanceOf() public view returns(uint256) {
        return underlying.balanceOf(address(this)) + underlying.balanceOf(address(destination));
    }

    function pause() external onlyStrategist {
        depositPaused = true;
    }

    function unpause() external onlyStrategist {
        depositPaused = false;
    }

    function setStrategist(address newStrategist) external onlyOwner {
        require(newStrategist != address(0));
        strategist = newStrategist;
        emit UpdatedStrategist(newStrategist);
    }
    
    function setFeeRecipient(address newFeeRecipient) external onlyOwner {
        require(newFeeRecipient != address(0));
        feeRecipient = newFeeRecipient;
        emit UpdatedFeeRecipient(newFeeRecipient);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

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

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

    /**
     * @dev Moves `amount` tokens from the caller's account to `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);

    /**
     * @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);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (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 anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

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

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

    /**
     * @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;
}

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

pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.sol";

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

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

    uint256 private _status;

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

    function __ReentrancyGuard_init_unchained() internal onlyInitializing {
        _status = _NOT_ENTERED;
    }

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

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

        _;

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

    /**
     * @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;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (security/Pausable.sol)

pragma solidity ^0.8.0;

import "../utils/ContextUpgradeable.sol";
import "../proxy/utils/Initializable.sol";

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract PausableUpgradeable is Initializable, ContextUpgradeable {
    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    bool private _paused;

    /**
     * @dev Initializes the contract in unpaused state.
     */
    function __Pausable_init() internal onlyInitializing {
        __Pausable_init_unchained();
    }

    function __Pausable_init_unchained() internal onlyInitializing {
        _paused = false;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        _requireNotPaused();
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        _requirePaused();
        _;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        return _paused;
    }

    /**
     * @dev Throws if the contract is paused.
     */
    function _requireNotPaused() internal view virtual {
        require(!paused(), "Pausable: paused");
    }

    /**
     * @dev Throws if the contract is not paused.
     */
    function _requirePaused() internal view virtual {
        require(paused(), "Pausable: not paused");
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }

    /**
     * @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;
}

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

interface IBaseStrategy {

// to deposit funds to a destination contract
function deposit(uint256 amount) external returns(uint256);

// to withdraw funds from the destination contract
function withdraw(uint256 amount) external returns(uint256);

// claim or collect rewards functions
function harvest() external;

// disable deposit
function pause() external;

// enable deposit
function unpause() external;

// calculate the total underlying token in the strategy contract and destination contract
function balanceOf() external view returns(uint256);

// calculate the total amount of tokens in the strategy contract
function balanceOfWant() external view returns(uint256);

// calculate the total amount of tokens in the destination contract
function balanceOfPool() external view returns(uint256);

// set the recipient address of the collected fee
function setFeeRecipient(address newFeeRecipient) external;

function canDeposit(uint256 amount) external view returns(bool);
}

// 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;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (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]
 * ```
 * 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. Equivalent to `reinitializer(1)`.
     */
    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.
     *
     * `initializer` is equivalent to `reinitializer(1)`, so 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.
     *
     * 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.
     */
    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.
     */
    function _disableInitializers() internal virtual {
        require(!_initializing, "Initializable: contract is initializing");
        if (_initialized < type(uint8).max) {
            _initialized = type(uint8).max;
            emit Initialized(type(uint8).max);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (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
     * ====
     *
     * [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://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

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

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

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

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

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

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

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

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

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

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly
                /// @solidity memory-safe-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 100
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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IWETH","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"unpause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"vault","outputs":[{"internalType":"contract IMasterVault","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"withdraw","outputs":[{"internalType":"uint256","name":"value","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]

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