// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;

interface ICurveGauge {
    function deposit(uint256) external;
    function balanceOf(address) external view returns (uint256);
    function withdraw(uint256) external;
    function claim_rewards() external;
    function reward_tokens(uint256) external view returns(address);//v2
    function rewarded_token() external view returns(address);//v1
}

interface ICurveVoteEscrow {
    function create_lock(uint256, uint256) external;
    function increase_amount(uint256) external;
    function increase_unlock_time(uint256) external;
    function withdraw() external;
    function smart_wallet_checker() external view returns (address);
}

interface IWalletChecker {
    function check(address) external view returns (bool);
}

interface IVoting{
    function vote(uint256, bool, bool) external; //voteId, support, executeIfDecided
    function getVote(uint256) external view returns(bool,bool,uint64,uint64,uint64,uint64,uint256,uint256,uint256,bytes memory); 
    function vote_for_gauge_weights(address,uint256) external;
}

interface IMinter{
    function mint(address) external;
}

interface IRegistry{
    function get_registry() external view returns(address);
    function get_address(uint256 _id) external view returns(address);
    function gauge_controller() external view returns(address);
    function get_lp_token(address) external view returns(address);
    function get_gauges(address) external view returns(address[10] memory,uint128[10] memory);
}

interface IStaker{
    function deposit(address, address) external;
    function withdraw(address) external;
    function withdraw(address, address, uint256) external;
    function withdrawAll(address, address) external;
    function createLock(uint256, uint256) external;
    function increaseAmount(uint256) external;
    function increaseTime(uint256) external;
    function release() external;
    function claimCrv(address) external returns (uint256);
    function claimRewards(address) external;
    function claimFees(address,address) external;
    function setStashAccess(address, bool) external;
    function vote(uint256,address,bool) external;
    function voteGaugeWeight(address,uint256) external;
    function balanceOfPool(address) external view returns (uint256);
    function operator() external view returns (address);
    function execute(address _to, uint256 _value, bytes calldata _data) external returns (bool, bytes memory);
}

interface IRewards{
    function stake(address, uint256) external;
    function stakeFor(address, uint256) external;
    function withdraw(address, uint256) external;
    function exit(address) external;
    function getReward(address) external;
    function queueNewRewards(uint256) external;
    function notifyRewardAmount(uint256) external;
    function addExtraReward(address) external;
    function stakingToken() external view returns (address);
    function rewardToken() external view returns(address);
    function earned(address account) external view returns (uint256);
}

interface IStash{
    function stashRewards() external returns (bool);
    function processStash() external returns (bool);
    function claimRewards() external returns (bool);
}

interface IFeeDistro{
    function claim() external;
    function token() external view returns(address);
}

interface ITokenMinter{
    function mint(address,uint256) external;
    function burn(address,uint256) external;
}

interface IDeposit{
    function isShutdown() external view returns(bool);
    function balanceOf(address _account) external view returns(uint256);
    function totalSupply() external view returns(uint256);
    function poolInfo(uint256) external view returns(address,address,address,address,address, bool);
    function rewardClaimed(uint256,address,uint256) external;
    function withdrawTo(uint256,uint256,address) external;
    function claimRewards(uint256,address) external returns(bool);
    function rewardArbitrator() external returns(address);
    function setGaugeRedirect(uint256 _pid) external returns(bool);
    function owner() external returns(address);
}

interface ICrvDeposit{
    function deposit(uint256, bool) external;
    function lockIncentive() external view returns(uint256);
}

interface IRewardFactory{
    function setAccess(address,bool) external;
    function CreateCrvRewards(uint256,address) external returns(address);
    function CreateTokenRewards(address,address,address) external returns(address);
    function activeRewardCount(address) external view returns(uint256);
    function addActiveReward(address,uint256) external returns(bool);
    function removeActiveReward(address,uint256) external returns(bool);
}

interface IStashFactory{
    function CreateStash(uint256,address,address,uint256) external returns(address);
}

interface ITokenFactory{
    function CreateDepositToken(address) external returns(address);
}

interface IPools{
    function addPool(address _lptoken, address _gauge, uint256 _stashVersion) external returns(bool);
    function shutdownPool(uint256 _pid) external returns(bool);
    function poolInfo(uint256) external view returns(address,address,address,address,address,bool);
    function poolLength() external view returns (uint256);
    function gaugeMap(address) external view returns(bool);
    function setPoolManager(address _poolM) external;
}

interface IVestedEscrow{
    function fund(address[] calldata _recipient, uint256[] calldata _amount) external returns(bool);
}

// File: @openzeppelin\contracts\math\SafeMath.sol
pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        uint256 c = a + b;
        if (c < a) return (false, 0);
        return (true, c);
    }

    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b > a) return (false, 0);
        return (true, a - b);
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, 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 (true, 0);
        uint256 c = a * b;
        if (c / a != b) return (false, 0);
        return (true, c);
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a / b);
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a % b);
    }

    /**
     * @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) {
        require(b <= a, "SafeMath: subtraction overflow");
        return a - b;
    }

    /**
     * @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) {
        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, reverting 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) {
        require(b > 0, "SafeMath: division by zero");
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting 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) {
        require(b > 0, "SafeMath: modulo by zero");
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * 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);
        return a - b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryDiv}.
     *
     * 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);
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * 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: @openzeppelin\contracts\token\ERC20\IERC20.sol

pragma solidity >=0.6.0 <0.8.0;

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

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

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

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

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

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

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

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

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

pragma solidity >=0.6.2 <0.8.0;

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

        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly { size := extcodesize(account) }
        return size > 0;
    }

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

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (bool success, ) = recipient.call{ value: amount }("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

pragma solidity >=0.6.0 <0.8.0;


/**
 * @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\ExtraRewardStashV1.sol


pragma solidity 0.6.12;


contract ExtraRewardStashV1 {
    using SafeERC20 for IERC20;
    using Address for address;
    using SafeMath for uint256;

    uint256 private constant WEEK = 7 * 86400;
    uint256 private constant maxRewards = 8;

    uint256 public pid;
    address public operator;
    address public staker;
    address public gauge;
    address public rewardFactory;
   
    uint256 public historicalRewards = 0;

    struct TokenInfo {
        address token;
        address rewardAddress;
        uint256 lastActiveTime;
    }
    TokenInfo public tokenInfo;

    constructor(uint256 _pid, address _operator, address _staker, address _gauge, address _rFactory) public {
        pid = _pid;
        operator = _operator;
        staker = _staker;
        gauge = _gauge;
        rewardFactory = _rFactory;
    }


    function getName() external pure returns (string memory) {
        return "ExtraRewardStashV1";
    }

    function setToken() internal {
        address token = ICurveGauge(gauge).rewarded_token();

        if(token != address(0)){
            //set token address
            tokenInfo.token = token;

            //create new reward contract
            (,,,address mainRewardContract,,) = IDeposit(operator).poolInfo(pid);
        	address rewardContract = IRewardFactory(rewardFactory).CreateTokenRewards(
	        	token,
	        	mainRewardContract,
	        	address(this));
            tokenInfo.rewardAddress = rewardContract;
            tokenInfo.lastActiveTime = block.timestamp;
        }
    }

    function claimRewards() external returns (bool) {
        require(msg.sender == operator, "!authorized");
        //first time init
        if(tokenInfo.token == address(0)){
            setToken();
        }

        if(tokenInfo.token != address(0)){
            uint256 before = IERC20(tokenInfo.token).balanceOf(staker);
            IDeposit(operator).claimRewards(pid,gauge);
            uint256 newbalance = IERC20(tokenInfo.token).balanceOf(staker);
            if(newbalance > before){
                IStaker(staker).withdraw(tokenInfo.token);
                tokenInfo.lastActiveTime = block.timestamp;

                //make sure this pool is in active list,
                IRewardFactory(rewardFactory).addActiveReward(tokenInfo.token,pid);

                //check if other stashes are also active, and if so, send to arbitrator
                //do this here because processStash will have tokens from the arbitrator
                uint256 activeCount = IRewardFactory(rewardFactory).activeRewardCount(tokenInfo.token);
                if(activeCount > 1){
                    //send to arbitrator
                    address arb = IDeposit(operator).rewardArbitrator();
                    if(arb != address(0)){
                        IERC20(tokenInfo.token).safeTransfer(arb, newbalance);
                    }
                }

            }else{
                //check if this reward has been inactive too long
                if(block.timestamp > tokenInfo.lastActiveTime + WEEK){
                    //set as inactive
                    IRewardFactory(rewardFactory).removeActiveReward(tokenInfo.token,pid);
                }else{
                    //edge case around reward ending periods
                    if(newbalance > 0){
                        // - recently active pool
                        // - rewards claimed to staker contract via someone manually calling claim_rewards() on the gauge
                        // - rewards ended before the above call, which claimed the last available tokens
                        // - thus claimRewards doesnt see any new rewards, but there are rewards on the staker contract
                        // - i think its safe to assume claim will be called within the timeframe, or else these rewards
                        //     will be unretrievable until some pool starts rewards again 

                        //claim the tokens
                        IStaker(staker).withdraw(tokenInfo.token);

                        uint256 activeCount = IRewardFactory(rewardFactory).activeRewardCount(tokenInfo.token);
                        if(activeCount > 1){
                            //send to arbitrator
                            address arb = IDeposit(operator).rewardArbitrator();
                            if(arb != address(0)){
                                IERC20(tokenInfo.token).safeTransfer(arb, newbalance);
                            }
                        }
                    }
                }
            }
        }
        return true;
    }

    //pull assigned tokens from staker to stash
    function stashRewards() external pure returns(bool){
        //stashRewards() is also called on deposit
        //so dont need to try withdrawing here for v1
        // -> move withdraw() call to processStash() which is only called during reward claiming
        return true;
    }

    //send all extra rewards to their reward contracts
    function processStash() external returns(bool){
        require(msg.sender == operator, "!authorized");

        address token = tokenInfo.token;
        if(token == address(0)) return true;

        //send to rewards
        uint256 amount = IERC20(token).balanceOf(address(this));
        if (amount > 0) {
            historicalRewards = historicalRewards.add(amount);
        	//add to reward contract
        	address rewards = tokenInfo.rewardAddress;
        	if(rewards == address(0)) return true;
        	IERC20(token).safeTransfer(rewards, amount);
        	IRewards(rewards).queueNewRewards(amount);
        }
        return true;
    }
}

// File: contracts\ExtraRewardStashV2.sol

pragma solidity 0.6.12;

contract ExtraRewardStashV2 {
    using SafeERC20 for IERC20;
    using Address for address;
    using SafeMath for uint256;

    address public constant crv = address(0xD533a949740bb3306d119CC777fa900bA034cd52);
    uint256 private constant maxRewards = 8;
    uint256 private constant WEEK = 7 * 86400;

    uint256 public immutable pid;
    address public immutable operator;
    address public immutable staker;
    address public immutable gauge;
    address public immutable rewardFactory;
   
    mapping(address => uint256) public historicalRewards;

    struct TokenInfo {
        address token;
        address rewardAddress;
        uint256 lastActiveTime;
    }
    uint256 public tokenCount;
    TokenInfo[maxRewards] public tokenInfo;

    constructor(uint256 _pid, address _operator, address _staker, address _gauge, address _rFactory) public {
        pid = _pid;
        operator = _operator;
        staker = _staker;
        gauge = _gauge;
        rewardFactory = _rFactory;
    }

    function getName() external pure returns (string memory) {
        return "ExtraRewardStashV2";
    }

    //try claiming if there are reward tokens registered
    function claimRewards() external returns (bool) {
        require(msg.sender == operator, "!authorized");

        //this is updateable in v2 gauges now so must check each time.
        checkForNewRewardTokens();

        uint256 length = tokenCount;
        if(length > 0){
            //get previous balances of all tokens
            uint256[] memory balances = new uint256[](length);
            for(uint256 i=0; i < length; i++){
                balances[i] = IERC20(tokenInfo[i].token).balanceOf(staker);
            }
            //claim rewards on gauge for staker
            //booster will call for future proofing (cant assume anyone will always be able to call)
            IDeposit(operator).claimRewards(pid,gauge);

            for(uint256 i=0; i < length; i++){
                address token = tokenInfo[i].token;
                uint256 newbalance = IERC20(token).balanceOf(staker);
                //stash if balance increased
                if(newbalance > balances[i]){
                    IStaker(staker).withdraw(token);
                    tokenInfo[i].lastActiveTime = block.timestamp;

                    //make sure this pool is in active list,
                    IRewardFactory(rewardFactory).addActiveReward(token,pid);


                    //check if other stashes are also active, and if so, send to arbitrator
                    //do this here because processStash will have tokens from the arbitrator
                    uint256 activeCount = IRewardFactory(rewardFactory).activeRewardCount(token);
                    if(activeCount > 1){
                        //send to arbitrator
                        address arb = IDeposit(operator).rewardArbitrator();
                        if(arb != address(0)){
                            IERC20(token).safeTransfer(arb, newbalance);
                        }
                    }

                }else{
                    //check if this reward has been inactive too long
                    if(block.timestamp > tokenInfo[i].lastActiveTime + WEEK){
                        //set as inactive
                        IRewardFactory(rewardFactory).removeActiveReward(token,pid);
                    }else{
                        //edge case around reward ending periods
                        if(newbalance > 0){
                            // - recently active pool
                            // - rewards claimed to staker contract via a deposit/withdraw(or someone manually calling on the gauge)
                            // - rewards ended before the deposit, thus deposit took the last available tokens
                            // - thus claimRewards doesnt see any new rewards, but there are rewards on the staker contract
                            // - i think its safe to assume claim will be called within the timeframe, or else these rewards
                            //     will be unretrievable until some pool starts rewards again 

                            //claim the tokens
                            IStaker(staker).withdraw(token);

                            uint256 activeCount = IRewardFactory(rewardFactory).activeRewardCount(token);
                            if(activeCount > 1){
                                //send to arbitrator
                                address arb = IDeposit(operator).rewardArbitrator();
                                if(arb != address(0)){
                                    IERC20(token).safeTransfer(arb, newbalance);
                                }
                            }
                        }
                    }
                }
            }
        }
        return true;
    }
   

    //check if gauge rewards have changed
    function checkForNewRewardTokens() internal {
        for(uint256 i = 0; i < maxRewards; i++){
            address token = ICurveGauge(gauge).reward_tokens(i);
            if (token == address(0)) {
                for (uint256 x = i; x < tokenCount; x++) {
                    IRewardFactory(rewardFactory).removeActiveReward(tokenInfo[x].token,pid);
                }
                if (i != tokenCount) {
                    tokenCount = i;
                }
                break;
            }
            setToken(i, token);
        }
    }

    //replace a token on token list
    function setToken(uint256 _tid, address _token) internal {
        TokenInfo storage t = tokenInfo[_tid];
        address currentToken = t.token;
        if(currentToken != _token){
            //set old as inactive
            IRewardFactory(rewardFactory).removeActiveReward(currentToken,pid);

            //set token address
            t.token = _token;

            //create new reward contract
                (,,,address mainRewardContract,,) = IDeposit(operator).poolInfo(pid);
            address rewardContract = IRewardFactory(rewardFactory).CreateTokenRewards(
                _token,
                mainRewardContract,
                address(this));
            t.rewardAddress = rewardContract;
            t.lastActiveTime = 0;
            //do not set as active yet, wait for first earmark
        }
    }

    //pull assigned tokens from staker to stash
    function stashRewards() external returns(bool){
        require(msg.sender == operator, "!authorized");

        //after depositing/withdrawing, extra incentive tokens are transfered to the staking contract
        //need to pull them off and stash here.
        for(uint i=0; i < tokenCount; i++){
            TokenInfo storage t = tokenInfo[i];
            address token = t.token;
            if(token == address(0)) continue;
            
            //only stash if rewards are active
            if(block.timestamp <= t.lastActiveTime + WEEK){
                uint256 before = IERC20(token).balanceOf(address(this));
                IStaker(staker).withdraw(token);
               

                //check for multiple pools claiming same token
                uint256 activeCount = IRewardFactory(rewardFactory).activeRewardCount(token);
                if(activeCount > 1){
                    //take difference of before/after(only send new tokens)
                    uint256 amount = IERC20(token).balanceOf(address(this));
                    amount = amount.sub(before);

                    //send to arbitrator
                    address arb = IDeposit(operator).rewardArbitrator();
                    if(arb != address(0)){
                        IERC20(token).safeTransfer(arb, amount);
                    }
                }
            }
        }
        return true;
    }

    //send all extra rewards to their reward contracts
    function processStash() external returns(bool){
        require(msg.sender == operator, "!authorized");

        for(uint i=0; i < tokenCount; i++){
            TokenInfo storage t = tokenInfo[i];
            address token = t.token;
            if(token == address(0)) continue;
            
            uint256 amount = IERC20(token).balanceOf(address(this));
            if (amount > 0) {
                historicalRewards[token] = historicalRewards[token].add(amount);
                if(token == crv){
                    //if crv, send back to booster to distribute
                    IERC20(token).safeTransfer(operator, amount);
                    continue;
                }
            	//add to reward contract
            	address rewards = t.rewardAddress;
            	if(rewards == address(0)) continue;
            	IERC20(token).safeTransfer(rewards, amount);
            	IRewards(rewards).queueNewRewards(amount);
            }
        }
        return true;
    }

}

// File: contracts\interfaces\IRewardHook.sol
pragma solidity 0.6.12;

interface IRewardHook {
    function onRewardClaim() external;
}

// File: contracts\ExtraRewardStashV3.sol

pragma solidity 0.6.12;

//Stash v3: support for curve gauge reward redirect
//v3.1: support for arbitrary token rewards outside of gauge rewards
//      add reward hook to pull rewards during claims

contract ExtraRewardStashV3 {
    using SafeERC20 for IERC20;
    using Address for address;
    using SafeMath for uint256;

    address public constant crv = address(0xD533a949740bb3306d119CC777fa900bA034cd52);
    uint256 private constant maxRewards = 8;

    uint256 public immutable pid;
    address public immutable operator;
    address public immutable staker;
    address public immutable gauge;
    address public immutable rewardFactory;
   
    mapping(address => uint256) public historicalRewards;
    bool public hasRedirected;
    bool public hasCurveRewards;

    struct TokenInfo {
        address token;
        address rewardAddress;
    }

    //use mapping+array so that we dont have to loop check each time setToken is called
    mapping(address => TokenInfo) public tokenInfo;
    address[] public tokenList;

    //address to call for reward pulls
    address public rewardHook;

    constructor(uint256 _pid, address _operator, address _staker, address _gauge, address _rFactory) public {
        pid = _pid;
        operator = _operator;
        staker = _staker;
        gauge = _gauge;
        rewardFactory = _rFactory;
    }

    function getName() external pure returns (string memory) {
        return "ExtraRewardStashV3.1";
    }

    function tokenCount() external view returns (uint256){
        return tokenList.length;
    }

    //try claiming if there are reward tokens registered
    function claimRewards() external returns (bool) {
        require(msg.sender == operator, "!operator");

        //this is updateable from v2 gauges now so must check each time.
        checkForNewRewardTokens();

        //make sure we're redirected
        if(!hasRedirected){
            IDeposit(operator).setGaugeRedirect(pid);
            hasRedirected = true;
        }

        if(hasCurveRewards){
            //claim rewards on gauge for staker
            //using reward_receiver so all rewards will be moved to this stash
            IDeposit(operator).claimRewards(pid,gauge);
        }

        //hook for reward pulls
        if(rewardHook != address(0)){
            try IRewardHook(rewardHook).onRewardClaim(){
            }catch{}
        }
        return true;
    }
   

    //check if gauge rewards have changed
    function checkForNewRewardTokens() internal {
        for(uint256 i = 0; i < maxRewards; i++){
            address token = ICurveGauge(gauge).reward_tokens(i);
            if (token == address(0)) {
                break;
            }
            if(!hasCurveRewards){
                hasCurveRewards = true;
            }
            setToken(token);
        }
    }

    //register an extra reward token to be handled
    // (any new incentive that is not directly on curve gauges)
    function setExtraReward(address _token) external{
        //owner of booster can set extra rewards
        require(IDeposit(operator).owner() == msg.sender, "!owner");
        setToken(_token);
    }

    function setRewardHook(address _hook) external{
        //owner of booster can set reward hook
        require(IDeposit(operator).owner() == msg.sender, "!owner");
        rewardHook = _hook;
    }


    //replace a token on token list
    function setToken(address _token) internal {
        TokenInfo storage t = tokenInfo[_token];

        if(t.token == address(0)){
            //set token address
            t.token = _token;

            //check if crv
            if(_token != crv){
                //create new reward contract (for NON-crv tokens only)
                (,,,address mainRewardContract,,) = IDeposit(operator).poolInfo(pid);
                address rewardContract = IRewardFactory(rewardFactory).CreateTokenRewards(
                    _token,
                    mainRewardContract,
                    address(this));
                
                t.rewardAddress = rewardContract;
            }
            //add token to list of known rewards
            tokenList.push(_token);
        }
    }

    //pull assigned tokens from staker to stash
    function stashRewards() external pure returns(bool){

        //after depositing/withdrawing, extra incentive tokens are claimed
        //but from v3 this is default to off, and this stash is the reward receiver too.

        return true;
    }

    //send all extra rewards to their reward contracts
    function processStash() external returns(bool){
        require(msg.sender == operator, "!operator");

        uint256 tCount = tokenList.length;
        for(uint i=0; i < tCount; i++){
            TokenInfo storage t = tokenInfo[tokenList[i]];
            address token = t.token;
            if(token == address(0)) continue;
            
            uint256 amount = IERC20(token).balanceOf(address(this));
            if (amount > 0) {
                historicalRewards[token] = historicalRewards[token].add(amount);
                if(token == crv){
                    //if crv, send back to booster to distribute
                    IERC20(token).safeTransfer(operator, amount);
                    continue;
                }
            	//add to reward contract
            	address rewards = t.rewardAddress;
            	if(rewards == address(0)) continue;
            	IERC20(token).safeTransfer(rewards, amount);
            	IRewards(rewards).queueNewRewards(amount);
            }
        }
        return true;
    }

}

// File: contracts\StashFactory.sol

pragma solidity 0.6.12;


contract StashFactory {
    using Address for address;

    bytes4 private constant rewarded_token = 0x16fa50b1; //rewarded_token()
    bytes4 private constant reward_tokens = 0x54c49fe9; //reward_tokens(uint256)
    bytes4 private constant rewards_receiver = 0x01ddabf1; //rewards_receiver(address)

    address public operator;
    address public rewardFactory;

    constructor(address _operator, address _rewardFactory) public {
        operator = _operator;
        rewardFactory = _rewardFactory;
    }

    //Create a stash contract for the given gauge.
    //function calls are different depending on the version of curve gauges so determine which stash type is needed
    function CreateStash(uint256 _pid, address _gauge, address _staker, uint256 _stashVersion) external returns(address){
        require(msg.sender == operator, "!authorized");

        if(_stashVersion == uint256(3) && IsV3(_gauge)){
            //v3
            ExtraRewardStashV3 stash = new ExtraRewardStashV3(_pid,operator,_staker,_gauge,rewardFactory);
            return address(stash);
        }else if(_stashVersion == uint256(1) && IsV1(_gauge)){
            //v1
            ExtraRewardStashV1 stash = new ExtraRewardStashV1(_pid,operator,_staker,_gauge,rewardFactory);
            return address(stash);
        }else if(_stashVersion == uint256(2) && !IsV3(_gauge) && IsV2(_gauge)){
            //v2
            ExtraRewardStashV2 stash = new ExtraRewardStashV2(_pid,operator,_staker,_gauge,rewardFactory);
            return address(stash);
        }
        bool isV1 = IsV1(_gauge);
        bool isV2 = IsV2(_gauge);
        bool isV3 = IsV3(_gauge);
        require(!isV1 && !isV2 && !isV3,"stash version mismatch");
        return address(0);
    }

    function IsV1(address _gauge) private returns(bool){
        bytes memory data = abi.encode(rewarded_token);
        (bool success,) = _gauge.call(data);
        return success;
    }

    function IsV2(address _gauge) private returns(bool){
        bytes memory data = abi.encodeWithSelector(reward_tokens,uint256(0));
        (bool success,) = _gauge.call(data);
        return success;
    }

    function IsV3(address _gauge) private returns(bool){
        bytes memory data = abi.encodeWithSelector(rewards_receiver,address(0));
        (bool success,) = _gauge.call(data);
        return success;
    }
}
{"success": true, "error": null, "results": {"detectors": [{"check": "reentrancy-no-eth", "impact": "Medium", "confidence": "Medium"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "unused-return", "impact": "Medium", "confidence": "Medium"}]}}