Contract Diff Checker

Contract Name:
StrategyV3_DynamicCAKE

Contract Source Code:

File 1 of 1 : StrategyV3_DynamicCAKE

// Sources flattened with hardhat v2.3.0 https://hardhat.org

// File contracts/interfaces/IERC20.sol

// SPDX-License-Identifier: MIT

pragma solidity ^0.6.12;

// import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/IERC20.sol";
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 contracts/libraries/SafeMath.sol

pragma solidity ^0.6.12;

// https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/math/SafeMath.sol
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}


// File contracts/libraries/Address.sol

pragma solidity 0.6.12;

// import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/SafeERC20.sol";
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 Converts an `address` into `address payable`. Note that this is
     * simply a type cast: the actual underlying value is not changed.
     *
     * _Available since v2.4.0._
     */
    function toPayable(address account)
        internal
        pure
        returns (address payable)
    {
        return address(uint160(account));
    }

    /**
     * @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 v3.3._
     */
    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 v3.3._
     */
    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 contracts/libraries/SafeERC20.sol

pragma solidity 0.6.12;
/**
 * @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 SafeMath for uint256;
    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).add(value);
        _callOptionalReturn(
            token,
            abi.encodeWithSelector(
                token.approve.selector,
                spender,
                newAllowance
            )
        );
    }

    function safeDecreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance =
            token.allowance(address(this), spender).sub(
                value,
                "SafeERC20: decreased allowance below zero"
            );
        _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 contracts/helpers/ReentrancyGuard.sol

pragma solidity 0.6.12;

// "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/ReentrancyGuard.sol";
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

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

    uint256 private _status;

    constructor() internal {
        _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 make it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

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

        _;

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


// File contracts/helpers/Context.sol

pragma solidity 0.6.12;

// https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/Context.sol
abstract contract Context {
    function _msgSender() internal view virtual returns (address payable) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}


// File contracts/helpers/Pausable.sol

pragma solidity 0.6.12;
// "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/Pausable.sol";
contract Pausable is Context {
    /**
     * @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.
     */
    constructor() internal {
        _paused = false;
    }

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

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

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


// File contracts/helpers/Ownable.sol

pragma solidity 0.6.12;
// import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/access/Ownable.sol";
abstract contract Ownable is Context {
    address private _owner;

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() internal {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

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

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

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


// File contracts/interfaces/IXswapFarm.sol

pragma solidity 0.6.12;

interface IXswapFarm {
    function poolLength() external view returns (uint256);

    function userInfo() external view returns (uint256);

    // Return reward multiplier over the given _from to _to block.
    function getMultiplier(uint256 _from, uint256 _to)
        external
        view
        returns (uint256);

    // View function to see pending CAKEs on frontend.
    // function pendingCake(uint256 _pid, address _user)
    //     external
    //     view
    //     returns (uint256);

    // Deposit LP tokens to the farm for farm's token allocation.
    function deposit(uint256 _pid, uint256 _amount) external;

    // Withdraw LP tokens from MasterChef.
    function withdraw(uint256 _pid, uint256 _amount) external;

    // Withdraw without caring about rewards. EMERGENCY ONLY.
    function emergencyWithdraw(uint256 _pid) external;
}


// File contracts/interfaces/IXRouter01.sol

pragma solidity 0.6.12;

interface IXRouter01 {
    function factory() external pure returns (address);

    function WETH() external pure returns (address);

    function addLiquidity(
        address tokenA,
        address tokenB,
        uint256 amountADesired,
        uint256 amountBDesired,
        uint256 amountAMin,
        uint256 amountBMin,
        address to,
        uint256 deadline
    )
        external
        returns (
            uint256 amountA,
            uint256 amountB,
            uint256 liquidity
        );

    function addLiquidityETH(
        address token,
        uint256 amountTokenDesired,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline
    )
        external
        payable
        returns (
            uint256 amountToken,
            uint256 amountETH,
            uint256 liquidity
        );

    function removeLiquidity(
        address tokenA,
        address tokenB,
        uint256 liquidity,
        uint256 amountAMin,
        uint256 amountBMin,
        address to,
        uint256 deadline
    ) external returns (uint256 amountA, uint256 amountB);

    function removeLiquidityETH(
        address token,
        uint256 liquidity,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline
    ) external returns (uint256 amountToken, uint256 amountETH);

    function removeLiquidityWithPermit(
        address tokenA,
        address tokenB,
        uint256 liquidity,
        uint256 amountAMin,
        uint256 amountBMin,
        address to,
        uint256 deadline,
        bool approveMax,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external returns (uint256 amountA, uint256 amountB);

    function removeLiquidityETHWithPermit(
        address token,
        uint256 liquidity,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline,
        bool approveMax,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external returns (uint256 amountToken, uint256 amountETH);

    function swapExactTokensForTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external returns (uint256[] memory amounts);

    function swapTokensForExactTokens(
        uint256 amountOut,
        uint256 amountInMax,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external returns (uint256[] memory amounts);

    function swapExactETHForTokens(
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external payable returns (uint256[] memory amounts);

    function swapTokensForExactETH(
        uint256 amountOut,
        uint256 amountInMax,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external returns (uint256[] memory amounts);

    function swapExactTokensForETH(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external returns (uint256[] memory amounts);

    function swapETHForExactTokens(
        uint256 amountOut,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external payable returns (uint256[] memory amounts);

    function quote(
        uint256 amountA,
        uint256 reserveA,
        uint256 reserveB
    ) external pure returns (uint256 amountB);

    function getAmountOut(
        uint256 amountIn,
        uint256 reserveIn,
        uint256 reserveOut
    ) external pure returns (uint256 amountOut);

    function getAmountIn(
        uint256 amountOut,
        uint256 reserveIn,
        uint256 reserveOut
    ) external pure returns (uint256 amountIn);

    function getAmountsOut(uint256 amountIn, address[] calldata path)
        external
        view
        returns (uint256[] memory amounts);

    function getAmountsIn(uint256 amountOut, address[] calldata path)
        external
        view
        returns (uint256[] memory amounts);
}


// File contracts/interfaces/IXRouter02.sol

pragma solidity 0.6.12;
interface IXRouter02 is IXRouter01 {
    function removeLiquidityETHSupportingFeeOnTransferTokens(
        address token,
        uint256 liquidity,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline
    ) external returns (uint256 amountETH);

    function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
        address token,
        uint256 liquidity,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline,
        bool approveMax,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external returns (uint256 amountETH);

    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;

    function swapExactETHForTokensSupportingFeeOnTransferTokens(
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external payable;

    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;
}


// File contracts/StrategyV3.sol

pragma solidity 0.6.12;
interface IWBNB is IERC20 {
    function deposit() external payable;

    function withdraw(uint256 wad) external;
}

abstract contract StrategyV3 is Ownable, ReentrancyGuard, Pausable {
    // Maximises yields in e.g. pancakeswap

    using SafeMath for uint256;
    using SafeERC20 for IERC20;

    bool public isSingleVault;
    bool public isAutoComp;

    address public farmContractAddress; // address of farm, eg, PCS, Thugs etc.
    uint256 public pid; // pid of pool in farmContractAddress
    address public wantAddress;
    address public token0Address;
    address public token1Address;
    address public earnedAddress;
    address public uniRouterAddress; // uniswap, pancakeswap etc
    address public buybackRouterAddress = 0x10ED43C718714eb63d5aA57B78B54704E256024E; // uniswap, pancakeswap etc
    uint256 public routerDeadlineDuration = 300;  // Set on global level, could be passed to functions via arguments

    address public wbnbAddress;
    address public nativeFarmAddress;
    address public NATIVEAddress;
    address public govAddress; // timelock contract

    uint256 public lastEarnBlock = 0;
    uint256 public wantLockedTotal = 0;
    uint256 public sharesTotal = 0;

    uint256 public controllerFee = 200;
    uint256 public constant controllerFeeMax = 10000; // 100 = 1%
    uint256 public constant controllerFeeUL = 300;

    uint256 public buyBackRate = 200;
    uint256 public constant buyBackRateMax = 10000; // 100 = 1%
    uint256 public constant buyBackRateUL = 800;
    address public constant buyBackAddress = 0x000000000000000000000000000000000000dEaD;
    
    uint256 public entranceFeeFactor; // < 0.1% entrance fee - goes to pool + prevents front-running
    uint256 public constant entranceFeeFactorMax = 10000;
    uint256 public constant entranceFeeFactorLL = 9950; // 0.5% is the max entrance fee settable. LL = lowerlimit

    uint256 public depositFeeFactor; // 9600 == 4% fee
    uint256 public constant depositFeeFactorMax = 10000; // 100 = 1%
    uint256 public constant depositFeeFactorLL = 9500;

    uint256 public withdrawFeeFactor;
    uint256 public constant withdrawFeeFactorMax = 10000;
    uint256 public constant withdrawFeeFactorLL = 9950;

    uint256 public slippageFactor = 950; // 5% default slippage tolerance
    uint256 public constant slippageFactorUL = 995;

    address[] public earnedToNATIVEPath;
    address[] public earnedToToken0Path;
    address[] public earnedToToken1Path;
    address[] public token0ToEarnedPath;
    address[] public token1ToEarnedPath;
    address[] public earnedToWBNBPath;
    address[] public WBNBToNATIVEPath;

    modifier onlyAllowGov() {
        require(msg.sender == govAddress, "Not authorised");
        _;
    }

    // Receives new deposits from user
    function deposit(address _userAddress, uint256 _wantAmt)
        public
        virtual
        onlyOwner
        nonReentrant
        whenNotPaused
        returns (uint256)
    {
        IERC20(wantAddress).safeTransferFrom(
            address(msg.sender),
            address(this),
            _wantAmt
        );

        // If depositFee in set, than _wantAmt - depositFee
        if (depositFeeFactor < depositFeeFactorMax) {
            _wantAmt = _wantAmt.mul(depositFeeFactor).div(depositFeeFactorMax);
        }

        uint256 sharesAdded = _wantAmt;
        if (wantLockedTotal > 0 && sharesTotal > 0) {
            sharesAdded = _wantAmt
                .mul(sharesTotal)
                .mul(entranceFeeFactor)
                .div(wantLockedTotal)
                .div(entranceFeeFactorMax);
        }
        sharesTotal = sharesTotal.add(sharesAdded);

        if (isAutoComp) {
            _farm();
        } else {
            wantLockedTotal = wantLockedTotal.add(_wantAmt);
        }

        return sharesAdded;
    }

    function farm() public virtual nonReentrant {
        _farm();
    }

    function _farm() internal virtual {
        require(isAutoComp, "!isAutoComp");
        uint256 wantAmt = IERC20(wantAddress).balanceOf(address(this));
        wantLockedTotal = wantLockedTotal.add(wantAmt);
        IERC20(wantAddress).safeIncreaseAllowance(farmContractAddress, wantAmt);

        IXswapFarm(farmContractAddress).deposit(pid, wantAmt);
    }

    function _unfarm(uint256 _wantAmt) internal virtual {
        IXswapFarm(farmContractAddress).withdraw(pid, _wantAmt);
    }

    function withdraw(address _userAddress, uint256 _wantAmt)
        public
        virtual
        onlyOwner
        nonReentrant
        returns (uint256)
    {
        require(_wantAmt > 0, "_wantAmt <= 0");

        uint256 sharesRemoved = _wantAmt.mul(sharesTotal).div(wantLockedTotal);
        if (sharesRemoved > sharesTotal) {
            sharesRemoved = sharesTotal;
        }
        sharesTotal = sharesTotal.sub(sharesRemoved);

        if (withdrawFeeFactor < withdrawFeeFactorMax) {
            _wantAmt = _wantAmt.mul(withdrawFeeFactor).div(withdrawFeeFactorMax);
        }

        if (isAutoComp) {
            _unfarm(_wantAmt);
        }

        uint256 wantAmt = IERC20(wantAddress).balanceOf(address(this));
        if (_wantAmt > wantAmt) {
            _wantAmt = wantAmt;
        }

        if (wantLockedTotal < _wantAmt) {
            _wantAmt = wantLockedTotal;
        }
    
        wantLockedTotal = wantLockedTotal.sub(_wantAmt);

        IERC20(wantAddress).safeTransfer(nativeFarmAddress, _wantAmt);

        return sharesRemoved;
    }

    // 1. Harvest farm tokens
    // 2. Converts farm tokens into want tokens
    // 3. Deposits want tokens

    function earn() public virtual nonReentrant whenNotPaused {
        require(isAutoComp, "!isAutoComp");

        // Harvest farm tokens
        _unfarm(0);

        // Converts farm tokens into want tokens
        uint256 earnedAmt = IERC20(earnedAddress).balanceOf(address(this));

        earnedAmt = distributeFees(earnedAmt);
        earnedAmt = buyBack(earnedAmt);

        if (isSingleVault) {
            if (earnedAddress != wantAddress) {
                IERC20(earnedAddress).safeIncreaseAllowance(
                    uniRouterAddress,
                    earnedAmt
                );

                // Swap earned to want
                _safeSwap(
                    uniRouterAddress,
                    earnedAmt,
                    slippageFactor,
                    earnedToToken0Path,
                    address(this),
                    now + routerDeadlineDuration
                );
            }
            lastEarnBlock = block.number;
            _farm();
            return;
        }

        IERC20(earnedAddress).safeIncreaseAllowance(
            uniRouterAddress,
            earnedAmt
        );

        if (earnedAddress != token0Address) {
            // Swap half earned to token0
            _safeSwap(
                uniRouterAddress,
                earnedAmt.div(2),
                slippageFactor,
                earnedToToken0Path,
                address(this),
                now + routerDeadlineDuration
            );
        }

        if (earnedAddress != token1Address) {
            // Swap half earned to token1
            _safeSwap(
                uniRouterAddress,
                earnedAmt.div(2),
                slippageFactor,
                earnedToToken1Path,
                address(this),
                now + routerDeadlineDuration
            );
        }

        // Get want tokens, ie. add liquidity
        uint256 token0Amt = IERC20(token0Address).balanceOf(address(this));
        uint256 token1Amt = IERC20(token1Address).balanceOf(address(this));
        if (token0Amt > 0 && token1Amt > 0) {
            IERC20(token0Address).safeIncreaseAllowance(
                uniRouterAddress,
                token0Amt
            );
            IERC20(token1Address).safeIncreaseAllowance(
                uniRouterAddress,
                token1Amt
            );
            IXRouter02(uniRouterAddress).addLiquidity(
                token0Address,
                token1Address,
                token0Amt,
                token1Amt,
                0,
                0,
                address(this),
                now + routerDeadlineDuration
            );
        }

        lastEarnBlock = block.number;

        _farm();
    }

    function buyBack(uint256 _earnedAmt) internal virtual returns (uint256) {
        if (buyBackRate <= 0) {
            return _earnedAmt;
        }

        uint256 buyBackAmt = _earnedAmt.mul(buyBackRate).div(buyBackRateMax);

        if (uniRouterAddress != buybackRouterAddress) {
            // Example case: LP token on ApeSwap and NATIVE token on PancakeSwap

            if (earnedAddress != wbnbAddress) {
                // First convert earn to wbnb
                IERC20(earnedAddress).safeIncreaseAllowance(
                    uniRouterAddress,
                    buyBackAmt
                );

                IXRouter02(uniRouterAddress)
                    .swapExactTokensForTokensSupportingFeeOnTransferTokens(
                    buyBackAmt,
                    0,
                    earnedToWBNBPath,
                    address(this),
                    now + routerDeadlineDuration
                );
            }

            // convert all wbnb to Native and burn them
            uint256 wbnbAmt = IERC20(wbnbAddress).balanceOf(address(this));
            if (wbnbAmt > 0) {
                IERC20(wbnbAddress).safeIncreaseAllowance(
                    buybackRouterAddress,
                    wbnbAmt
                );

                IXRouter02(buybackRouterAddress)
                    .swapExactTokensForTokensSupportingFeeOnTransferTokens(
                    wbnbAmt,
                    0,
                    WBNBToNATIVEPath,
                    buyBackAddress,
                    now + routerDeadlineDuration
                );
            }
        } else {
            IERC20(earnedAddress).safeIncreaseAllowance(
                uniRouterAddress,
                buyBackAmt
            );

            _safeSwap(
                uniRouterAddress,
                buyBackAmt,
                slippageFactor,
                earnedToNATIVEPath,
                buyBackAddress,
                now + routerDeadlineDuration
            );
        }

        return _earnedAmt.sub(buyBackAmt);
    }

    function distributeFees(uint256 _earnedAmt) internal virtual returns (uint256) {
        if (_earnedAmt > 0) {
            // Performance fee
            if (controllerFee > 0) {
                uint256 fee =
                    _earnedAmt.mul(controllerFee).div(controllerFeeMax);
                IERC20(earnedAddress).safeTransfer(govAddress, fee);
                _earnedAmt = _earnedAmt.sub(fee);
            }
        }

        return _earnedAmt;
    }

    function convertDustToEarned() public virtual whenNotPaused {
        require(isAutoComp, "!isAutoComp");
        require(!isSingleVault, "isSingleVault");

        // Converts dust tokens into earned tokens, which will be reinvested on the next earn().

        // Converts token0 dust (if any) to earned tokens
        uint256 token0Amt = IERC20(token0Address).balanceOf(address(this));
        if (token0Address != earnedAddress && token0Amt > 0) {
            IERC20(token0Address).safeIncreaseAllowance(
                uniRouterAddress,
                token0Amt
            );

            // Swap all dust tokens to earned tokens
            _safeSwap(
                uniRouterAddress,
                token0Amt,
                slippageFactor,
                token0ToEarnedPath,
                address(this),
                now + routerDeadlineDuration
            );
        }

        // Converts token1 dust (if any) to earned tokens
        uint256 token1Amt = IERC20(token1Address).balanceOf(address(this));
        if (token1Address != earnedAddress && token1Amt > 0) {
            IERC20(token1Address).safeIncreaseAllowance(
                uniRouterAddress,
                token1Amt
            );

            // Swap all dust tokens to earned tokens
            _safeSwap(
                uniRouterAddress,
                token1Amt,
                slippageFactor,
                token1ToEarnedPath,
                address(this),
                now + routerDeadlineDuration
            );
        }
    }

    function pause() public virtual onlyAllowGov {
        _pause();
    }

    function unpause() external virtual onlyAllowGov {
        _unpause();
    }

    function setEntranceFeeFactor(uint256 _entranceFeeFactor) public onlyAllowGov {
        require(_entranceFeeFactor > entranceFeeFactorLL, "!safe - too low");
        require(_entranceFeeFactor <= entranceFeeFactorMax, "!safe - too high");
        entranceFeeFactor = _entranceFeeFactor;
    }

    function setControllerFee(uint256 _controllerFee) public onlyAllowGov{
        require(_controllerFee <= controllerFeeUL, "too high");
        controllerFee = _controllerFee;
    }

    function setGov(address _govAddress) public virtual onlyAllowGov {
        govAddress = _govAddress;
    }

    function setDepositFeeFactor(uint256 _depositFeeFactor) public onlyAllowGov{
        require(_depositFeeFactor > depositFeeFactorLL, "!safe - too low");
        require(_depositFeeFactor <= depositFeeFactorMax, "!safe - too high");
        depositFeeFactor = _depositFeeFactor;
    }

    function setWithdrawFeeFactor(uint256 _withdrawFeeFactor) public onlyAllowGov {
        require(_withdrawFeeFactor > withdrawFeeFactorLL, "!safe - too low");
        require(_withdrawFeeFactor <= withdrawFeeFactorMax, "!safe - too high");
        withdrawFeeFactor = _withdrawFeeFactor;
    }

    function setbuyBackRate(uint256 _buyBackRate) public onlyAllowGov {
        require(buyBackRate <= buyBackRateUL, "too high");
        buyBackRate = _buyBackRate;
    }

    function setBuybackRouterAddress(address _buybackRouterAddress) public onlyAllowGov {
        buybackRouterAddress = _buybackRouterAddress;
    }

    function inCaseTokensGetStuck(
        address _token,
        uint256 _amount,
        address _to
    ) public virtual onlyAllowGov {
        require(_token != earnedAddress, "!safe");
        require(_token != wantAddress, "!safe");
        IERC20(_token).safeTransfer(_to, _amount);
    }

    function _wrapBNB() internal virtual onlyAllowGov {
        // BNB -> WBNB
        uint256 bnbBal = address(this).balance;
        if (bnbBal > 0) {
            IWBNB(wbnbAddress).deposit{value: bnbBal}(); // BNB -> WBNB
        }
    }

    function _safeSwap(
        address _uniRouterAddress,
        uint256 _amountIn,
        uint256 _slippageFactor,
        address[] memory _path,
        address _to,
        uint256 _deadline
    ) internal virtual {
        uint256[] memory amounts =
            IXRouter02(_uniRouterAddress).getAmountsOut(_amountIn, _path);
        uint256 amountOut = amounts[amounts.length.sub(1)];

        IXRouter02(_uniRouterAddress)
            .swapExactTokensForTokensSupportingFeeOnTransferTokens(
            _amountIn,
            amountOut.mul(_slippageFactor).div(1000),
            _path,
            _to,
            _deadline
        );
    }
}


// File contracts/StrategyV3_DynamicCAKE.sol

pragma solidity 0.6.12;
interface ISmartChef {
    function deposit(uint256 _amount) external;

    function withdraw(uint256 _amount) external;
}

contract StrategyV3_DynamicCAKE is StrategyV3 {
    constructor(
        address[] memory _addresses,
        address[] memory _tokenAddresses,
        uint256 _pid,
        address[] memory _earnedToNATIVEPath,
        address[] memory _earnedToToken0Path,
        address[] memory _earnedToToken1Path,
        address[] memory _token0ToEarnedPath,
        address[] memory _token1ToEarnedPath,
        uint256 _depositFeeFactor,
        uint256 _withdrawFeeFactor,
        uint256 _entranceFeeFactor
    ) public {
        nativeFarmAddress = _addresses[0];
        farmContractAddress = _addresses[1];
        govAddress = _addresses[2];
        uniRouterAddress = _addresses[3];

        NATIVEAddress = _tokenAddresses[0];
        wbnbAddress = _tokenAddresses[1];
        wantAddress = _tokenAddresses[2];
        earnedAddress = _tokenAddresses[3];
        token0Address = _tokenAddresses[4];
        token1Address = _tokenAddresses[5];

        pid = _pid;
        isSingleVault = true;
        isAutoComp = true;

        earnedToNATIVEPath = _earnedToNATIVEPath;
        earnedToToken0Path = _earnedToToken0Path;
        earnedToToken1Path = _earnedToToken1Path;
        token0ToEarnedPath = _token0ToEarnedPath;
        token1ToEarnedPath = _token1ToEarnedPath;

        depositFeeFactor = _depositFeeFactor;
        withdrawFeeFactor = _withdrawFeeFactor;
        entranceFeeFactor = _entranceFeeFactor;

        transferOwnership(nativeFarmAddress);
    }

    function _farm() internal override {
        require(isAutoComp, "!isAutoComp");
        uint256 wantAmt = IERC20(wantAddress).balanceOf(address(this));
        wantLockedTotal = wantLockedTotal.add(wantAmt);
        IERC20(wantAddress).safeIncreaseAllowance(farmContractAddress, wantAmt);

        ISmartChef(farmContractAddress).deposit(wantAmt);
    }

    function _unfarm(uint256 _wantAmt) internal override {
        ISmartChef(farmContractAddress).withdraw(_wantAmt);
    }

    function switchPool(
        address _farmContractAddress,
        address _earnedAddress,
        address[] memory _earnedToNATIVEPath,
        address[] memory _earnedToToken0Path
    )
        external
        nonReentrant
        onlyAllowGov 
    {
        _unfarm(wantLockedTotal);

         uint256 earnedAmt = IERC20(earnedAddress).balanceOf(address(this));

        earnedAmt = distributeFees(earnedAmt);
        earnedAmt = buyBack(earnedAmt);

        IERC20(earnedAddress).safeIncreaseAllowance(
            uniRouterAddress,
            earnedAmt
        );

        _safeSwap(
            uniRouterAddress,
            earnedAmt,
            slippageFactor,
            earnedToToken0Path,
            address(this),
            now + routerDeadlineDuration
        );

        lastEarnBlock = block.number;

        farmContractAddress = _farmContractAddress;
        earnedAddress = _earnedAddress;
        earnedToNATIVEPath = _earnedToNATIVEPath;
        earnedToToken0Path = _earnedToToken0Path;

        IERC20(wantAddress).safeIncreaseAllowance(farmContractAddress, wantLockedTotal);
        ISmartChef(farmContractAddress).deposit(wantLockedTotal);
    }
}

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