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// SPDX-License-Identifier: MIT
pragma solidity 0.8.11;

import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

import { ICrvDepositor } from "../interfaces/ICrvDepositor.sol";
import { ILitDepositorHelper } from "../interfaces/ILitDepositorHelper.sol";
import { ICrvVoteEscrow } from "../interfaces/ICrvVoteEscrow.sol";

import { Math } from "../utils/Math.sol";

/**
 * @title   PrelaunchRewardsPool
 * @author  LiquisFinance
 * @notice  Staking rewards contract for the prelaunch of Liquis Protocol.
 */
contract PrelaunchRewardsPool {
    using SafeMath for uint256;
    using SafeERC20 for IERC20;

    IERC20 public rewardToken;
    IERC20 public immutable stakingToken;
    IERC20 public immutable lit;
    uint256 public constant duration = 7 days;

    address public owner;
    address public crvDepositor;
    address public litConvertor;
    address public voterProxy;
    address public immutable escrow;

    uint256 public periodFinish = 0;
    uint256 public rewardRate = 0;
    uint256 public lastUpdateTime;
    uint256 public rewardPerTokenStored;
    uint256 public currentRewards = 0;
    uint256 public historicalRewards = 0;

    uint256 public totalSupply;

    uint256 public immutable START_WITHDRAWALS;
    uint256 public immutable START_VESTING_DATE;
    uint256 public immutable END_VESTING_DATE;

    uint256 public totalRenounced;

    mapping(address => uint256) public userRewardPerTokenPaid;
    mapping(address => uint256) public rewards;
    mapping(address => uint256) public balances;
    mapping(address => uint256) public claimed;
    mapping(address => bool) public isVestingUser;

    event Staked(address indexed user, uint256 amount);
    event Converted(address indexed user, uint256 amount);
    event Withdrawn(address indexed user, uint256 amount);
    event Claimed(address indexed user, uint256 reward);
    event Recovered(address token, uint256 amount);
    event RewardAdded(uint256 reward);
    event OwnerUpdated(address newOwner);
    event CrvDepositorUpdated(address indexed crvDepositor);
    event VoterProxyUpdated(address indexed voterProxy);
    event RewardTokenUpdated(address indexed rewardToken);

    /**
     * @dev Initializes variables, approves lit and sets target dates.
     * @param _stakingToken  BPT token BAL 20-80 WETH/LIT
     * @param _rewardToken   LIQ
     * @param _litConvertor  Contract that converts LIT to BPT
     * @param _lit           LIT
     * @param _crvDepositor  Contract that locks BPT for liqLIT
     * @param _voterProxy    Contract that holds veLIT voting power (is whitelisted on veLIT)
     * @param _escrow        veLIT
     */
    constructor(
        address _stakingToken,
        address _rewardToken,
        address _litConvertor,
        address _lit,
        address _crvDepositor,
        address _voterProxy,
        address _escrow
    ) {
        owner = msg.sender;

        stakingToken = IERC20(_stakingToken);
        rewardToken = IERC20(_rewardToken);

        litConvertor = _litConvertor;
        crvDepositor = _crvDepositor;
        voterProxy = _voterProxy;
        escrow = _escrow;

        lit = IERC20(_lit);
        lit.safeApprove(litConvertor, type(uint256).max);

        START_VESTING_DATE = block.timestamp + 28 days;
        END_VESTING_DATE = START_VESTING_DATE + 180 days;

        START_WITHDRAWALS = START_VESTING_DATE + 60 days;
    }

    // ----- Reward Functions ----- //

    modifier updateReward(address account) {
        rewardPerTokenStored = rewardPerToken();
        lastUpdateTime = lastTimeRewardApplicable();
        if (account != address(0)) {
            rewards[account] = earned(account);
            userRewardPerTokenPaid[account] = rewardPerTokenStored;
        }
        _;
    }

    /**
     * @dev Returns how many rewards a given account has earned
     * @param account    Address for which the request is made
     */
    function earned(address account) public view returns (uint256) {
        return (balances[account] * (rewardPerToken() - userRewardPerTokenPaid[account])) / 1e18 + rewards[account];
    }

    function rewardPerToken() public view returns (uint256) {
        if (totalSupply == 0) {
            return rewardPerTokenStored;
        }
        return
            rewardPerTokenStored + (((lastTimeRewardApplicable() - lastUpdateTime) * rewardRate * 1e18) / totalSupply);
    }

    function lastTimeRewardApplicable() public view returns (uint256) {
        return Math.min(block.timestamp, periodFinish);
    }

    // ----- Stake Functions ----- //

    function stake(uint256 _amount) public returns (bool) {
        // pull tokens from msg.sender
        stakingToken.safeTransferFrom(msg.sender, address(this), _amount);

        _processStake(_amount, msg.sender);
        return true;
    }

    function stakeAll() external returns (bool) {
        uint256 balance = stakingToken.balanceOf(msg.sender);

        stake(balance);
        return true;
    }

    function stakeFor(address _for, uint256 _amount) external returns (bool) {
        // pull tokens from msg.sender
        stakingToken.safeTransferFrom(msg.sender, address(this), _amount);

        _processStake(_amount, _for);
        return true;
    }

    /**
     * @dev Converts user LIT into BPT and stakes it, reward is updated in low level func _processStake
     */
    function stakeLit(uint256 amount, uint256 minOut) external {
        lit.safeTransferFrom(msg.sender, address(this), amount);

        uint256 bptReceived = ILitDepositorHelper(litConvertor).convertLitToBpt(amount, minOut);

        _processStake(bptReceived, msg.sender);
    }

    /**
     * @dev Generic internal staking function that updates rewards based on previous balances, then update balances
     * @param _amount    Units to add to the users balance
     * @param _receiver  Address of user who will receive the stake
     */
    function _processStake(uint256 _amount, address _receiver) internal updateReward(_receiver) {
        require(_amount > 0, "Cannot stake 0");

        // update storage variables
        totalSupply = totalSupply + _amount;
        balances[_receiver] = balances[_receiver] + _amount;

        emit Staked(_receiver, _amount);
    }

    /**
     * @dev Called by a staker to convert all their staked BPT balance to liqLIT (if target address set)
     * Note crvDepositor address should be populated after rewards have ended
     */
    function convert() external updateReward(msg.sender) onlyAfterDate(START_VESTING_DATE) {
        require(ICrvVoteEscrow(escrow).balanceOf(voterProxy) > 0, "Not activated");

        uint256 userStake = balances[msg.sender];

        // update state variables
        totalSupply = totalSupply - userStake;
        balances[msg.sender] = 0;

        // deposit to crvDepositor for the user, liqLit is sent directly to the user
        ICrvDepositor(crvDepositor).depositFor(msg.sender, userStake, true, address(0));

        // register the user as vesting user
        isVestingUser[msg.sender] = true;

        emit Converted(msg.sender, userStake);
    }

    // ----- Withdraw Functions ----- //

    /**
     * @dev Called by a staker to withdraw all their BPT stake
     * Note Rewards accumulated are renounced, users that withdraw are not eligible for rewards vesting
     */
    function withdraw() external updateReward(msg.sender) onlyAfterDate(START_WITHDRAWALS) {
        require(ICrvVoteEscrow(escrow).balanceOf(voterProxy) == 0, "Activated");

        uint256 userStake = balances[msg.sender];

        require(userStake > 0, "Cannot withdraw 0");

        totalSupply = totalSupply - userStake;
        balances[msg.sender] = 0;

        // track renounced reward balances from users that withdraw
        uint256 rewardAccrued = rewards[msg.sender];
        totalRenounced += rewardAccrued;
        rewards[msg.sender] = 0;

        stakingToken.safeTransfer(msg.sender, userStake);

        emit Withdrawn(msg.sender, userStake);
    }

    // ----- Vesting Functions ----- //

    /**
     * @dev Called by a staker to get their vested LIQ rewards
     * Note In convertStakeToLiqLit() we make sure that rewards[msg.sender] mapping reflects all rewards
     */
    function claim() external onlyAfterDate(START_VESTING_DATE) {
        require(isVestingUser[msg.sender], "Not vesting User");

        uint256 unclaimedAmount = getClaimableLiqVesting(msg.sender);
        if (unclaimedAmount == 0) return;

        // update rewards claimed mapping
        claimed[msg.sender] += unclaimedAmount;

        rewardToken.safeTransfer(msg.sender, unclaimedAmount);

        emit Claimed(msg.sender, unclaimedAmount);
    }

    function getClaimableLiqVesting(address _account) public view returns (uint256 claimable) {
        if (block.timestamp < START_VESTING_DATE) return 0;

        if (block.timestamp >= END_VESTING_DATE) {
            claimable = rewards[_account] - claimed[_account];
        } else {
            claimable =
                ((rewards[_account] * (block.timestamp - START_VESTING_DATE)) /
                    (END_VESTING_DATE - START_VESTING_DATE)) -
                claimed[_account];
        }
    }

    // ----- Protected Functions ----- //

    /**
     * @dev Called by authorized addresses to allocate new LIQ rewards to this pool
     *      Rewards need to be first sent and subsequently call notifyRewardAmount
     *      There is no pull method in the function
     *      Can only be called before START_VESTING_DATE
     */
    function notifyRewardAmount(uint256 reward)
        external
        updateReward(address(0))
        onlyAuthorized
        onlyBeforeDate(START_VESTING_DATE)
    {
        rewardToken.safeTransferFrom(msg.sender, address(this), reward);

        historicalRewards = historicalRewards + reward;

        if (block.timestamp >= periodFinish) {
            rewardRate = reward / duration;
        } else {
            uint256 remaining = periodFinish - block.timestamp;
            uint256 leftover = remaining * rewardRate;
            reward = reward + leftover;
            rewardRate = reward / duration;
        }

        // Ensure the provided reward amount is not more than the balance in the contract.
        // This keeps the reward rate in the right range, preventing overflows due to
        // very high values of rewardRate in the earned and rewardsPerToken functions;
        // Reward + leftover must be less than 2^256 / 10^18 to avoid overflow.
        uint256 balance = rewardToken.balanceOf(address(this));
        require(rewardRate <= balance.div(duration), "Provided reward too high");

        currentRewards = reward;
        lastUpdateTime = block.timestamp;
        periodFinish = block.timestamp + duration;

        emit RewardAdded(reward);
    }

    function setOwner(address _owner) external onlyAuthorized {
        owner = _owner;

        emit OwnerUpdated(_owner);
    }

    function setCrvDepositor(address _crvDepositor) external onlyAuthorized {
        crvDepositor = _crvDepositor;

        // approve crvDepositor to convert contract BPT to liqLIT
        IERC20(stakingToken).safeApprove(crvDepositor, type(uint256).max);

        emit CrvDepositorUpdated(_crvDepositor);
    }

    function setVoterProxy(address _voterProxy) external onlyAuthorized {
        voterProxy = _voterProxy;

        emit VoterProxyUpdated(_voterProxy);
    }

    function setRewardToken(address _rewardToken) external onlyAuthorized {
        IERC20(_rewardToken).safeTransferFrom(owner, address(this), rewardToken.balanceOf(address(this)));

        rewardToken = IERC20(_rewardToken);

        emit RewardTokenUpdated(_rewardToken);
    }

    /**
     * @dev Allows the owner to pull the renounced balances from people that withdrew
     */
    function recoverRenouncedLiq() external onlyAuthorized {
        uint256 _totalRenounced = totalRenounced;

        totalRenounced = 0;
        rewardToken.safeTransfer(msg.sender, _totalRenounced);

        emit Recovered(address(rewardToken), _totalRenounced);
    }

    /**
     * @dev Allows the owner to recover other ERC20s mistakingly sent to this contract
     */
    function recoverERC20(address tokenAddress, uint256 tokenAmount) external onlyAuthorized {
        require(tokenAddress != address(stakingToken) && tokenAddress != address(rewardToken), "Not valid token");
        IERC20(tokenAddress).safeTransfer(owner, tokenAmount);

        emit Recovered(tokenAddress, tokenAmount);
    }

    // ----- Modifiers ----- //

    modifier onlyAuthorized() {
        require(msg.sender == owner, "!auth");
        _;
    }

    modifier onlyAfterDate(uint256 limitDate) {
        require(block.timestamp > limitDate, "Currently not possible");
        _;
    }

    modifier onlyBeforeDate(uint256 limitDate) {
        require(block.timestamp < limitDate, "No longer possible");
        _;
    }
}

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

pragma solidity ^0.8.0;

// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
 * now has built in overflow checking.
 */
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) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            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) {
        unchecked {
            // 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) {
        unchecked {
            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) {
        unchecked {
            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) {
        return a + b;
    }

    /**
     * @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 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) {
        return a * b;
    }

    /**
     * @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.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        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) {
        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) {
        unchecked {
            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.
     *
     * 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) {
        unchecked {
            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) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}

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

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

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

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

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

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

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

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

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

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

pragma solidity ^0.8.1;

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

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

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

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

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

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

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

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

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

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

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

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

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../extensions/IERC20Permit.sol";
import "../../../utils/Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using Address for address;

    /**
     * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    /**
     * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
     * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
     */
    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'
        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));
    }

    /**
     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value));
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));
        }
    }

    /**
     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful. Compatible with tokens that require the approval to be set to
     * 0 before setting it to a non-zero value.
     */
    function forceApprove(IERC20 token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);

        if (!_callOptionalReturnBool(token, approvalCall)) {
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0));
            _callOptionalReturn(token, approvalCall);
        }
    }

    /**
     * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.
     * Revert on invalid signature.
     */
    function safePermit(
        IERC20Permit token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }

    /**
     * @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");
        require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
    }

    /**
     * @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).
     *
     * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        // 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 cannot use {Address-functionCall} here since this should return false
        // and not revert is the subcall reverts.

        (bool success, bytes memory returndata) = address(token).call(data);
        return
            success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token));
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.11;

interface ICrvDepositor {
    function depositFor(
        address to,
        uint256 _amount,
        bool _lock,
        address _stakeAddress
    ) external;
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.11;

interface ILitDepositorHelper {
    function deposit(
        uint256 _amount,
        uint256 _minOut,
        bool _lock,
        address _stakeAddress
    ) external returns (uint256 bptOut);

    function depositFor(
        address _for,
        uint256 _amount,
        uint256 _minOut,
        bool _lock,
        address _stakeAddress
    ) external returns (uint256 bptOut);

    function convertLitToBpt(uint256 _amount, uint256 _minOut) external returns (uint256 bptOut);
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.11;

interface ICrvVoteEscrow {
    function balanceOf(address) external view returns (uint256);
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.11;

/// @notice A library for performing overflow-/underflow-safe math,
/// updated with awesomeness from of DappHub (https://github.com/dapphub/ds-math).
library Math {
    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
        c = a + b;
    }

    function sub(uint256 a, uint256 b) internal pure returns (uint256 c) {
        c = a - b;
    }

    function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
        c = a * b;
    }

    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow, so we distribute.
        return (a / 2) + (b / 2) + (((a % 2) + (b % 2)) / 2);
    }

    function to224(uint256 a) internal pure returns (uint224 c) {
        require(a <= type(uint224).max, "Math: uint224 Overflow");
        c = uint224(a);
    }

    function to128(uint256 a) internal pure returns (uint128 c) {
        require(a <= type(uint128).max, "Math: uint128 Overflow");
        c = uint128(a);
    }

    function to112(uint256 a) internal pure returns (uint112 c) {
        require(a <= type(uint112).max, "Math: uint112 Overflow");
        c = uint112(a);
    }

    function to96(uint256 a) internal pure returns (uint96 c) {
        require(a <= type(uint96).max, "Math: uint96 Overflow");
        c = uint96(a);
    }

    function to32(uint256 a) internal pure returns (uint32 c) {
        require(a <= type(uint32).max, "Math: uint32 Overflow");
        c = uint32(a);
    }
}

/// @notice A library for performing overflow-/underflow-safe addition and subtraction on uint32.
library Math32 {
    function sub(uint32 a, uint32 b) internal pure returns (uint32 c) {
        c = a - b;
    }
}

/// @notice A library for performing overflow-/underflow-safe addition and subtraction on uint112.
library Math112 {
    function add(uint112 a, uint112 b) internal pure returns (uint112 c) {
        c = a + b;
    }

    function sub(uint112 a, uint112 b) internal pure returns (uint112 c) {
        c = a - b;
    }
}

/// @notice A library for performing overflow-/underflow-safe addition and subtraction on uint224.
library Math224 {
    function add(uint224 a, uint224 b) internal pure returns (uint224 c) {
        c = a + b;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/extensions/IERC20Permit.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /**
     * @dev Returns the current nonce for `owner`. This value must be
     * included whenever a signature is generated for {permit}.
     *
     * Every successful call to {permit} increases ``owner``'s nonce by one. This
     * prevents a signature from being used multiple times.
     */
    function nonces(address owner) external view returns (uint256);

    /**
     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view returns (bytes32);
}

{
  "optimizer": {
    "enabled": true,
    "runs": 1000
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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"inputs":[],"name":"lit","outputs":[{"internalType":"contract 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IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalRenounced","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"userRewardPerTokenPaid","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"voterProxy","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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0000000000000000000000009232a548dd9e81bac65500b5e0d918f8ba93675c000000000000000000000000d82fd4d6d62f89a1e50b1db69ad19932314aa40800000000000000000000000097a2585ddb121db8e9a3b6575e302f9c610af08c000000000000000000000000fd0205066521550d7d7ab19da8f72bb004b4c341000000000000000000000000b96bce10480d2a8eb2995ee4f04a70d48997856a00000000000000000000000037aeb332d6e57112f1bfe36923a7ee670ee9278b000000000000000000000000f17d23136b4fead139f54fb766c8795faae09660

-----Decoded View---------------
Arg [0] : _stakingToken (address): 0x9232a548DD9E81BaC65500b5e0d918F8Ba93675C
Arg [1] : _rewardToken (address): 0xD82fd4D6D62f89A1E50b1db69AD19932314aa408
Arg [2] : _litConvertor (address): 0x97a2585Ddb121db8E9a3B6575E302F9c610AF08c
Arg [3] : _lit (address): 0xfd0205066521550D7d7AB19DA8F72bb004b4C341
Arg [4] : _crvDepositor (address): 0xB96Bce10480d2a8eb2995Ee4f04a70d48997856a
Arg [5] : _voterProxy (address): 0x37aeB332D6E57112f1BFE36923a7ee670Ee9278b
Arg [6] : _escrow (address): 0xf17d23136B4FeAd139f54fB766c8795faae09660

-----Encoded View---------------
7 Constructor Arguments found :
Arg [0] : 0000000000000000000000009232a548dd9e81bac65500b5e0d918f8ba93675c
Arg [1] : 000000000000000000000000d82fd4d6d62f89a1e50b1db69ad19932314aa408
Arg [2] : 00000000000000000000000097a2585ddb121db8e9a3b6575e302f9c610af08c
Arg [3] : 000000000000000000000000fd0205066521550d7d7ab19da8f72bb004b4c341
Arg [4] : 000000000000000000000000b96bce10480d2a8eb2995ee4f04a70d48997856a
Arg [5] : 00000000000000000000000037aeb332d6e57112f1bfe36923a7ee670ee9278b
Arg [6] : 000000000000000000000000f17d23136b4fead139f54fb766c8795faae09660