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// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.5;

import '@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol';
import '@openzeppelin/contracts-upgradeable/security/ReentrancyGuardUpgradeable.sol';
import '@openzeppelin/contracts-upgradeable/security/PausableUpgradeable.sol';
import '@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol';
import '@openzeppelin/contracts/token/ERC20/ERC20.sol';
import '@openzeppelin/contracts/utils/structs/EnumerableSet.sol';
import '@openzeppelin/contracts/utils/Address.sol';
import '@openzeppelin/contracts/utils/math/SafeMath.sol';

import './libraries/DSMath.sol';
import './interfaces/IVeWom.sol';
import './interfaces/IVoter.sol';
import './interfaces/IBribeRewarderFactory.sol';
import './interfaces/IBoostedMasterWombat.sol';
import './interfaces/IBoostedMultiRewarder.sol';
import './interfaces/IMultiRewarder.sol';

/// @title BoostedMasterWombat
/// @notice MasterWombat is a boss. He is not afraid of any snakes. In fact, he drinks their venoms. So, veWom holders boost
/// their (boosted) emissions. This contract rewards users in function of their amount of lp staked (base pool) factor (boosted pool)
/// Factor and sumOfFactors are updated by contract VeWom.sol after any veWom minting/burning (veERC20Upgradeable hook).
/// Note that it's ownable and the owner wields tremendous power. The ownership
/// will be transferred to a governance smart contract once Wombat is sufficiently
/// distributed and the community can show to govern itself.
/// @dev Updates:
/// - Compatible with gauge voting
/// - Add support for BoostedMultiRewarder
contract BoostedMasterWombat is
    IBoostedMasterWombat,
    Initializable,
    OwnableUpgradeable,
    ReentrancyGuardUpgradeable,
    PausableUpgradeable
{
    using EnumerableSet for EnumerableSet.AddressSet;

    // Use `Native` for generic purpose
    string internal constant NATIVE_TOKEN_SYMBOL = 'Native';

    // Info of each user.
    struct UserInfo {
        // storage slot 1
        uint128 amount; // 20.18 fixed point. How many LP tokens the user has provided.
        uint128 factor; // 20.18 fixed point. boosted factor = sqrt (lpAmount * veWom.balanceOf())
        // storage slot 2
        uint128 rewardDebt; // 20.18 fixed point. Reward debt. See explanation below.
        uint128 pendingWom; // 20.18 fixed point. Amount of pending wom
        //
        // We do some fancy math here. Basically, any point in time, the amount of WOMs
        // entitled to a user but is pending to be distributed is:
        //
        //   ((user.amount * pool.accWomPerShare + user.factor * pool.accWomPerFactorShare) / 1e12) -
        //        user.rewardDebt
        //
        // Whenever a user deposits or withdraws LP tokens to a pool. Here's what happens:
        //   1. The pool's `accWomPerShare`, `accWomPerFactorShare` (and `lastRewardTimestamp`) gets updated.
        //   2. User receives the pending reward sent to his/her address.
        //   3. User's `amount` gets updated.
        //   4. User's `rewardDebt` gets updated.
    }

    // Info of each pool.
    struct PoolInfoV3 {
        IERC20 lpToken; // Address of LP token contract.
        ////
        IMultiRewarder rewarder; // This rewarder will be deprecated, please also refer to the mapping of boostedRewarders
        uint40 periodFinish;
        ////
        uint128 sumOfFactors; // 20.18 fixed point. the sum of all boosted factors by all of the users in the pool
        uint128 rewardRate; // 20.18 fixed point.
        ////
        uint104 accWomPerShare; // 19.12 fixed point. Accumulated WOM per share, times 1e12.
        uint104 accWomPerFactorShare; // 19.12 fixed point. Accumulated WOM per factor share
        uint40 lastRewardTimestamp;
    }

    uint256 public constant REWARD_DURATION = 7 days;
    uint256 public constant ACC_TOKEN_PRECISION = 1e12;
    uint256 public constant TOTAL_PARTITION = 1000;

    // Wom token
    IERC20 public wom;
    // Venom does not seem to hurt the Wombat, it only makes it stronger.
    IVeWom public veWom;
    // New Master Wombat address for future migrations
    IMasterWombatV3 newMasterWombat;
    // Address of Voter
    address public voter;
    // Base partition emissions (e.g. 300 for 30%).
    // BasePartition and boostedPartition add up to TOTAL_PARTITION (1000) for 100%
    uint16 public basePartition;
    // Set of all LP tokens that have been added as pools
    EnumerableSet.AddressSet internal lpTokens;
    /// @notice Info of each pool.
    /// @dev Note that `poolInfoV3[pid].rewarder` will be deprecated and it may co-exist with boostedRewarders[pid]
    PoolInfoV3[] public poolInfoV3;
    // userInfo[pid][user], Info of each user that stakes LP tokens
    mapping(uint256 => mapping(address => UserInfo)) public userInfo;
    // Mapping of asset to pid. Offset by +1 to distinguish with default value
    mapping(address => uint256) internal assetPid;
    // pid => address of boostedRewarder
    mapping(uint256 => IBoostedMultiRewarder) public override boostedRewarders;

    IBribeRewarderFactory public bribeRewarderFactory;

    event Add(uint256 indexed pid, IERC20 indexed lpToken, IBoostedMultiRewarder boostedRewarder);
    event SetNewMasterWombat(IMasterWombatV3 masterWormbat);
    event SetBribeRewarderFactory(IBribeRewarderFactory bribeRewarderFactory);
    event SetRewarder(uint256 indexed pid, IMultiRewarder rewarder);
    event SetBoostedRewarder(uint256 indexed pid, IBoostedMultiRewarder boostedRewarder);
    event Deposit(address indexed user, uint256 indexed pid, uint256 amount);
    event DepositFor(address indexed user, uint256 indexed pid, uint256 amount);
    event Withdraw(address indexed user, uint256 indexed pid, uint256 amount);
    event Harvest(address indexed user, uint256 indexed pid, uint256 amount);
    event EmergencyWithdraw(address indexed user, uint256 indexed pid, uint256 amount);
    event UpdateEmissionPartition(address indexed user, uint256 basePartition, uint256 boostedPartition);
    event UpdateVeWOM(address indexed user, address oldVeWOM, address newVeWOM);
    event UpdateVoter(address indexed user, address oldVoter, address newVoter);
    event UpdateWOM(address indexed user, address oldWOM, address newWOM);
    event EmergencyWomWithdraw(address owner, uint256 balance);

    /// @dev Modifier ensuring that certain function can only be called by VeWom
    modifier onlyVeWom() {
        require(address(veWom) == msg.sender, 'MasterWombat: caller is not VeWom');
        _;
    }

    /// @dev Modifier ensuring that certain function can only be called by Voter
    modifier onlyVoter() {
        require(address(voter) == msg.sender, 'MasterWombat: caller is not Voter');
        _;
    }

    function initialize(IERC20 _wom, IVeWom _veWom, address _voter, uint16 _basePartition) external initializer {
        require(_basePartition <= TOTAL_PARTITION, 'base partition must be in range 0, 1000');

        __Ownable_init();
        __ReentrancyGuard_init_unchained();
        __Pausable_init_unchained();

        wom = _wom;
        veWom = _veWom;
        voter = _voter;
        basePartition = _basePartition;
    }

    /**
     * @dev pause pool, restricting certain operations
     */
    function pause() external onlyOwner {
        _pause();
    }

    /**
     * @dev unpause pool, enabling certain operations
     */
    function unpause() external onlyOwner {
        _unpause();
    }

    function setNewMasterWombat(IMasterWombatV3 _newMasterWombat) external onlyOwner {
        newMasterWombat = _newMasterWombat;
        emit SetNewMasterWombat(_newMasterWombat);
    }

    function setBribeRewarderFactory(IBribeRewarderFactory _bribeRewarderFactory) external onlyOwner {
        bribeRewarderFactory = _bribeRewarderFactory;
        emit SetBribeRewarderFactory(_bribeRewarderFactory);
    }

    /// @notice Add a new lp to the pool. Can only be called by the owner.
    /// @dev Reverts if the same LP token is added more than once.
    /// @param _lpToken the corresponding lp token
    /// @param _boostedRewarder the rewarder
    function add(IERC20 _lpToken, IBoostedMultiRewarder _boostedRewarder) external onlyOwner {
        require(Address.isContract(address(_lpToken)), 'add: LP token must be a valid contract');
        require(
            Address.isContract(address(_boostedRewarder)) || address(_boostedRewarder) == address(0),
            'add: boostedRewarder must be contract or zero'
        );
        require(!lpTokens.contains(address(_lpToken)), 'add: LP already added');

        // update PoolInfoV3 with the new LP
        poolInfoV3.push(
            PoolInfoV3({
                lpToken: _lpToken,
                lastRewardTimestamp: uint40(block.timestamp),
                accWomPerShare: 0,
                rewarder: IMultiRewarder(address(0)),
                accWomPerFactorShare: 0,
                sumOfFactors: 0,
                periodFinish: uint40(block.timestamp),
                rewardRate: 0
            })
        );
        uint256 pid = poolInfoV3.length - 1;
        assetPid[address(_lpToken)] = pid + 1; // offset by +1
        boostedRewarders[pid] = _boostedRewarder;

        // add lpToken to the lpTokens enumerable set
        lpTokens.add(address(_lpToken));
        emit Add(pid, _lpToken, _boostedRewarder);
    }

    /// @notice Update the given pool's boostedRewarder
    /// @param _pid the pool id
    /// @param _boostedRewarder the boostedRewarder
    function setBoostedRewarder(uint256 _pid, IBoostedMultiRewarder _boostedRewarder) external override {
        require(msg.sender == address(bribeRewarderFactory) || msg.sender == owner(), 'not authorized');
        require(
            Address.isContract(address(_boostedRewarder)) || address(_boostedRewarder) == address(0),
            'set: boostedRewarder must be contract or zero'
        );

        boostedRewarders[_pid] = _boostedRewarder;
        emit SetBoostedRewarder(_pid, _boostedRewarder);
    }

    /// @notice Update the given pool's rewarder
    /// @param _pid the pool id
    /// @param _rewarder the rewarder
    function setRewarder(uint256 _pid, IMultiRewarder _rewarder) external onlyOwner {
        require(
            Address.isContract(address(_rewarder)) || address(_rewarder) == address(0),
            'set: rewarder must be contract or zero'
        );

        PoolInfoV3 storage pool = poolInfoV3[_pid];

        pool.rewarder = _rewarder;
        emit SetRewarder(_pid, _rewarder);
    }

    /// @notice Update reward variables for all pools.
    /// @dev Be careful of gas spending!
    function massUpdatePools() public override {
        uint256 length = poolInfoV3.length;
        for (uint256 pid; pid < length; ++pid) {
            _updatePool(pid);
        }
    }

    /// @notice Update reward variables of the given pool
    /// @param _pid the pool id
    function updatePool(uint256 _pid) external override {
        _updatePool(_pid);
    }

    function _updatePool(uint256 _pid) private {
        PoolInfoV3 storage pool = poolInfoV3[_pid];

        if (block.timestamp > pool.lastRewardTimestamp) {
            (uint256 accWomPerShare, uint256 accWomPerFactorShare) = calRewardPerUnit(_pid);
            pool.accWomPerShare = to104(accWomPerShare);
            pool.accWomPerFactorShare = to104(accWomPerFactorShare);
            pool.lastRewardTimestamp = uint40(lastTimeRewardApplicable(pool.periodFinish));

            // We can consider to skip this function to minimize gas
            // voter address can be zero during a migration. See comment in setVoter.
            if (voter != address(0)) {
                IVoter(voter).distribute(pool.lpToken);
            }
        }
    }

    /// @notice Distribute WOM over a period of 7 days
    /// @dev Refer to synthetix/StakingRewards.sol notifyRewardAmount
    /// Note: This looks safe from reentrancy.
    function notifyRewardAmount(address _lpToken, uint256 _amount) external override onlyVoter {
        require(_amount > 0, 'notifyRewardAmount: zero amount');

        // this line reverts if asset is not in the list
        uint256 pid = assetPid[_lpToken] - 1;
        PoolInfoV3 storage pool = poolInfoV3[pid];
        if (pool.lastRewardTimestamp >= pool.periodFinish) {
            pool.rewardRate = to128(_amount / REWARD_DURATION);
        } else {
            uint256 remainingTime = pool.periodFinish - pool.lastRewardTimestamp;
            uint256 leftoverReward = remainingTime * pool.rewardRate;
            pool.rewardRate = to128((_amount + leftoverReward) / REWARD_DURATION);
        }

        pool.lastRewardTimestamp = uint40(block.timestamp);
        pool.periodFinish = uint40(block.timestamp + REWARD_DURATION);

        // Event is not emitted as Voter should have already emitted it
    }

    /// @notice Helper function to migrate fund from multiple pools to the new MasterWombat.
    /// @notice user must initiate transaction from masterchef
    /// @dev Assume the orginal MasterWombat has stopped emisions
    /// hence we skip IVoter(voter).distribute() to save gas cost
    function migrate(uint256[] calldata _pids) external override nonReentrant {
        require(address(newMasterWombat) != (address(0)), 'to where?');

        _multiClaim(_pids);
        for (uint256 i; i < _pids.length; ++i) {
            uint256 pid = _pids[i];
            UserInfo storage user = userInfo[pid][msg.sender];

            if (user.amount > 0) {
                PoolInfoV3 storage pool = poolInfoV3[pid];
                pool.lpToken.approve(address(newMasterWombat), user.amount);
                uint256 newPid = newMasterWombat.getAssetPid(address(pool.lpToken));
                newMasterWombat.depositFor(newPid, user.amount, msg.sender);

                pool.sumOfFactors -= user.factor;
                // remove user
                delete userInfo[pid][msg.sender];
            }
        }
    }

    /// @notice Deposit LP tokens to MasterChef for WOM allocation on behalf of user
    /// @dev user must initiate transaction from masterchef
    /// @param _pid the pool id
    /// @param _amount amount to deposit
    /// @param _user the user being represented
    function depositFor(uint256 _pid, uint256 _amount, address _user) external override nonReentrant whenNotPaused {
        PoolInfoV3 storage pool = poolInfoV3[_pid];
        UserInfo storage user = userInfo[_pid][_user];

        // update pool in case user has deposited
        _updatePool(_pid);

        // update rewarders before we update lpSupply and sumOfFactors
        _updateUserAmount(_pid, _user, user.amount + _amount);

        // safe transfer is not needed for Asset
        pool.lpToken.transferFrom(msg.sender, address(this), _amount);
        emit DepositFor(_user, _pid, _amount);
    }

    /// @notice Deposit LP tokens to MasterChef for WOM allocation.
    /// @dev it is possible to call this function with _amount == 0 to claim current rewards
    /// @param _pid the pool id
    /// @param _amount amount to deposit
    function deposit(
        uint256 _pid,
        uint256 _amount
    ) external override nonReentrant whenNotPaused returns (uint256 reward, uint256[] memory additionalRewards) {
        PoolInfoV3 storage pool = poolInfoV3[_pid];
        UserInfo storage user = userInfo[_pid][msg.sender];

        // update pool in case user has deposited
        _updatePool(_pid);

        // update rewarders before we update lpSupply and sumOfFactors
        (reward, additionalRewards) = _updateUserAmount(_pid, msg.sender, user.amount + _amount);

        // safe transfer is not needed for Asset
        pool.lpToken.transferFrom(address(msg.sender), address(this), _amount);
        emit Deposit(msg.sender, _pid, _amount);
    }

    /// @notice claims rewards for multiple pids
    /// @param _pids array pids, pools to claim
    function multiClaim(
        uint256[] calldata _pids
    )
        external
        override
        nonReentrant
        whenNotPaused
        returns (uint256 reward, uint256[] memory amounts, uint256[][] memory additionalRewards)
    {
        return _multiClaim(_pids);
    }

    /// @notice private function to claim rewards for multiple pids
    /// @param _pids array pids, pools to claim
    function _multiClaim(
        uint256[] memory _pids
    ) private returns (uint256 reward, uint256[] memory amounts, uint256[][] memory additionalRewards) {
        // accumulate rewards for each one of the pids in pending
        amounts = new uint256[](_pids.length);
        additionalRewards = new uint256[][](_pids.length);
        for (uint256 i; i < _pids.length; ++i) {
            UserInfo storage user = userInfo[_pids[i]][msg.sender];
            _updatePool(_pids[i]);

            if (user.amount > 0) {
                PoolInfoV3 storage pool = poolInfoV3[_pids[i]];
                if (address(wom) != address(0)) {
                    // increase pending to send all rewards once
                    uint128 newRewardDebt = _getRewardDebt(
                        user.amount,
                        pool.accWomPerShare,
                        user.factor,
                        pool.accWomPerFactorShare
                    );
                    uint256 poolRewards = newRewardDebt + user.pendingWom - user.rewardDebt;

                    user.pendingWom = 0;

                    // update reward debt
                    user.rewardDebt = newRewardDebt;

                    // increase reward
                    reward += poolRewards;

                    amounts[i] = poolRewards;
                    emit Harvest(msg.sender, _pids[i], amounts[i]);
                }

                // if exist, update external rewarder
                IMultiRewarder rewarder = pool.rewarder;
                if (address(rewarder) != address(0)) {
                    additionalRewards[i] = rewarder.onReward(msg.sender, user.amount);
                }
                IBoostedMultiRewarder boostedRewarder = boostedRewarders[_pids[i]];
                if (address(boostedRewarder) != address(0)) {
                    // update rewarders before we update lpSupply and sumOfFactors
                    additionalRewards[i] = boostedRewarder.onReward(msg.sender, user.amount, user.factor);
                }
            }
        }

        // transfer all rewards
        // SafeERC20 is not needed as WOM will revert if transfer fails
        if (reward > 0) {
            wom.transfer(payable(msg.sender), reward);
        }
    }

    /// @notice Withdraw LP tokens from MasterWombat.
    /// @notice Automatically harvest pending rewards and sends to user
    /// @param _pid the pool id
    /// @param _amount the amount to withdraw
    function withdraw(
        uint256 _pid,
        uint256 _amount
    ) external override nonReentrant whenNotPaused returns (uint256 reward, uint256[] memory additionalRewards) {
        PoolInfoV3 storage pool = poolInfoV3[_pid];
        UserInfo storage user = userInfo[_pid][msg.sender];
        require(user.amount >= _amount, 'withdraw: not enough balance');

        _updatePool(_pid);

        // update rewarders before we update lpSupply and sumOfFactors
        (reward, additionalRewards) = _updateUserAmount(_pid, msg.sender, user.amount - _amount);

        // SafeERC20 is not needed as Asset will revert if transfer fails
        pool.lpToken.transfer(msg.sender, _amount);
        emit Withdraw(msg.sender, _pid, _amount);
    }

    /// @notice Update user balance and distribute WOM rewards
    function _updateUserAmount(
        uint256 _pid,
        address _user,
        uint256 _amount
    ) internal returns (uint256 reward, uint256[] memory additionalRewards) {
        PoolInfoV3 storage pool = poolInfoV3[_pid];
        UserInfo storage user = userInfo[_pid][_user];

        // Harvest WOM
        if (user.amount > 0 || user.pendingWom > 0) {
            if (address(wom) != address(0)) {
                reward =
                    _getRewardDebt(user.amount, pool.accWomPerShare, user.factor, pool.accWomPerFactorShare) +
                    user.pendingWom -
                    user.rewardDebt;
                user.pendingWom = 0;

                // SafeERC20 is not needed as WOM will revert if transfer fails
                if (reward > 0) {
                    wom.transfer(payable(_user), reward);
                }
                emit Harvest(_user, _pid, reward);
            }
        }

        // update amount of lp staked
        user.amount = to128(_amount);

        // update sumOfFactors
        uint256 oldFactor = user.factor;
        if (address(veWom) != address(0)) {
            user.factor = to128(DSMath.sqrt(user.amount * veWom.balanceOf(_user), user.amount));
        } else {
            user.factor = 0;
        }

        if (address(wom) != address(0)) {
            // update reward debt
            user.rewardDebt = _getRewardDebt(_amount, pool.accWomPerShare, user.factor, pool.accWomPerFactorShare);
        }

        // update rewarder before we update lpSupply and sumOfFactors
        // aggregate result from both rewardewrs
        IMultiRewarder rewarder = pool.rewarder;
        IBoostedMultiRewarder boostedRewarder = boostedRewarders[_pid];
        if (address(rewarder) != address(0) || address(boostedRewarder) != address(0)) {
            if (address(rewarder) == address(0)) {
                additionalRewards = boostedRewarder.onReward(_user, _amount, user.factor);
            } else if (address(boostedRewarder) == address(0)) {
                additionalRewards = rewarder.onReward(_user, _amount);
            } else {
                uint256[] memory temp1 = rewarder.onReward(_user, _amount);
                uint256[] memory temp2 = boostedRewarder.onReward(_user, _amount, user.factor);

                additionalRewards = concatArrays(temp1, temp2);
            }
        }

        pool.sumOfFactors = to128(pool.sumOfFactors + user.factor - oldFactor);
    }

    /// @notice Withdraw without caring about rewards. EMERGENCY ONLY.
    /// @param _pid the pool id
    function emergencyWithdraw(uint256 _pid) external override nonReentrant {
        PoolInfoV3 storage pool = poolInfoV3[_pid];
        UserInfo storage user = userInfo[_pid][msg.sender];

        // update rewarders before we update lpSupply and sumOfFactors
        IMultiRewarder rewarder = poolInfoV3[_pid].rewarder;
        if (address(rewarder) != address(0)) {
            rewarder.onReward(msg.sender, 0);
        }
        IBoostedMultiRewarder boostedRewarder = boostedRewarders[_pid];
        if (address(boostedRewarder) != address(0)) {
            boostedRewarder.onReward(msg.sender, 0, 0);
        }

        // safe transfer is not needed for Asset
        uint256 oldUserAmount = user.amount;
        pool.lpToken.transfer(address(msg.sender), oldUserAmount);

        pool.sumOfFactors = pool.sumOfFactors - user.factor;

        user.amount = 0;
        user.factor = 0;
        user.rewardDebt = 0;

        emit EmergencyWithdraw(msg.sender, _pid, oldUserAmount);
    }

    /// @notice updates emission partition
    /// @param _basePartition the future base partition
    function updateEmissionPartition(uint16 _basePartition) external onlyOwner {
        require(_basePartition <= TOTAL_PARTITION);
        massUpdatePools();
        basePartition = _basePartition;
        emit UpdateEmissionPartition(msg.sender, _basePartition, TOTAL_PARTITION - _basePartition);
    }

    /// @notice updates veWom address
    /// @param _newVeWom the new VeWom address
    function setVeWom(IVeWom _newVeWom) external onlyOwner {
        require(address(_newVeWom) != address(0));
        IVeWom oldVeWom = veWom;
        veWom = _newVeWom;
        emit UpdateVeWOM(msg.sender, address(oldVeWom), address(_newVeWom));
    }

    /// @notice updates wom address
    /// @param _newWom the new VeWom address
    function setWom(IERC20 _newWom) external onlyOwner {
        require(address(_newWom) != address(0));
        IERC20 oldWom = wom;
        wom = _newWom;
        emit UpdateWOM(msg.sender, address(oldWom), address(_newWom));
    }

    /// @notice updates voter address
    /// @param _newVoter the new Voter address
    function setVoter(address _newVoter) external onlyOwner {
        // voter address can be zero during a migration. This is done to avoid
        // the scenario where both old and new MasterWombat claims in migrate,
        // which calls voter.distribute. But only one can succeed as voter.distribute
        // is only callable from gauge manager.
        address oldVoter = voter;
        voter = _newVoter;
        emit UpdateVoter(msg.sender, oldVoter, _newVoter);
    }

    /// @notice updates factor after any veWom token operation (minting/burning)
    /// @param _user the user to update
    /// @param _newVeWomBalance the amount of veWOM
    /// @dev can only be called by veWom
    function updateFactor(address _user, uint256 _newVeWomBalance) external override onlyVeWom {
        // loop over each pool : beware gas cost!
        uint256 length = poolInfoV3.length;

        for (uint256 pid = 0; pid < length; ++pid) {
            UserInfo storage user = userInfo[pid][_user];

            // skip if user doesn't have any deposit in the pool
            if (user.amount == 0) {
                continue;
            }

            // first, update pool
            _updatePool(pid);
            PoolInfoV3 storage pool = poolInfoV3[pid];

            // calculate pending
            uint256 pending = _getRewardDebt(user.amount, pool.accWomPerShare, user.factor, pool.accWomPerFactorShare) -
                user.rewardDebt;
            // increase pendingWom
            user.pendingWom += to128(pending);

            // update boosted partition factor
            uint256 oldFactor = user.factor;
            uint256 newFactor = DSMath.sqrt(user.amount * _newVeWomBalance, user.amount);
            user.factor = to128(newFactor);
            // update reward debt, take into account newFactor
            user.rewardDebt = _getRewardDebt(user.amount, pool.accWomPerShare, newFactor, pool.accWomPerFactorShare);

            // update boostedRewarder before we update sumOfFactors
            IBoostedMultiRewarder boostedRewarder = boostedRewarders[pid];
            if (address(boostedRewarder) != address(0)) {
                boostedRewarder.onUpdateFactor(_user, user.factor);
            }

            // also, update sumOfFactors
            pool.sumOfFactors = to128(pool.sumOfFactors + newFactor - oldFactor);
        }
    }

    /// @notice In case we need to manually migrate WOM funds from MasterChef
    /// Sends all remaining wom from the contract to the owner
    function emergencyWomWithdraw() external onlyOwner {
        // safe transfer is not needed for WOM
        wom.transfer(address(msg.sender), wom.balanceOf(address(this)));
        emit EmergencyWomWithdraw(address(msg.sender), wom.balanceOf(address(this)));
    }

    /**
     * Read-only functions
     */

    /// @notice Get bonus token info from the rewarder contract for a given pool, if it is a double reward farm
    /// @param _pid the pool id
    function rewarderBonusTokenInfo(
        uint256 _pid
    ) public view override returns (IERC20[] memory bonusTokenAddresses, string[] memory bonusTokenSymbols) {
        // aggregate result from both rewardewrs
        IMultiRewarder rewarder = poolInfoV3[_pid].rewarder;
        IBoostedMultiRewarder boostedRewarder = boostedRewarders[_pid];
        if (address(rewarder) != address(0) || address(boostedRewarder) != address(0)) {
            if (address(rewarder) == address(0)) {
                bonusTokenAddresses = boostedRewarder.rewardTokens();
            } else if (address(boostedRewarder) == address(0)) {
                bonusTokenAddresses = rewarder.rewardTokens();
            } else {
                IERC20[] memory temp1 = rewarder.rewardTokens();
                IERC20[] memory temp2 = boostedRewarder.rewardTokens();

                bonusTokenAddresses = concatArrays(temp1, temp2);
            }
        }

        uint256 len = bonusTokenAddresses.length;
        bonusTokenSymbols = new string[](len);
        for (uint256 i; i < len; ++i) {
            if (address(bonusTokenAddresses[i]) == address(0)) {
                bonusTokenSymbols[i] = NATIVE_TOKEN_SYMBOL;
            } else {
                bonusTokenSymbols[i] = IERC20Metadata(address(bonusTokenAddresses[i])).symbol();
            }
        }
    }

    function boostedPartition() external view returns (uint256) {
        return TOTAL_PARTITION - basePartition;
    }

    /// @notice returns pool length
    function poolLength() external view override returns (uint256) {
        return poolInfoV3.length;
    }

    function getAssetPid(address asset) external view override returns (uint256) {
        uint256 pidBeforeOffset = assetPid[asset];
        if (pidBeforeOffset == 0) revert('invalid pid');
        // revert if asset not exist
        return pidBeforeOffset - 1;
    }

    function lastTimeRewardApplicable(uint256 _periodFinish) public view returns (uint256) {
        return block.timestamp < _periodFinish ? block.timestamp : _periodFinish;
    }

    function calRewardPerUnit(uint256 _pid) public view returns (uint256 accWomPerShare, uint256 accWomPerFactorShare) {
        PoolInfoV3 storage pool = poolInfoV3[_pid];
        uint256 lpSupply = pool.lpToken.balanceOf(address(this));

        accWomPerShare = pool.accWomPerShare;
        accWomPerFactorShare = pool.accWomPerFactorShare;

        if (lpSupply == 0 || block.timestamp <= pool.lastRewardTimestamp) {
            // update only if now > lastRewardTimestamp
            return (accWomPerShare, accWomPerFactorShare);
        }

        uint256 secondsElapsed = lastTimeRewardApplicable(pool.periodFinish) - pool.lastRewardTimestamp;
        uint256 womReward = secondsElapsed * pool.rewardRate;
        accWomPerShare += (womReward * ACC_TOKEN_PRECISION * basePartition) / (lpSupply * TOTAL_PARTITION);

        if (pool.sumOfFactors != 0) {
            accWomPerFactorShare +=
                (womReward * ACC_TOKEN_PRECISION * (TOTAL_PARTITION - basePartition)) /
                (pool.sumOfFactors * TOTAL_PARTITION);
        }
    }

    /// @notice View function to see pending WOMs on frontend.
    /// @param _pid the pool id
    /// @param _user the user address
    function pendingTokens(
        uint256 _pid,
        address _user
    )
        external
        view
        override
        returns (
            uint256 pendingRewards,
            IERC20[] memory bonusTokenAddresses,
            string[] memory bonusTokenSymbols,
            uint256[] memory pendingBonusRewards
        )
    {
        // calculate accWomPerShare and accWomPerFactorShare
        (uint256 accWomPerShare, uint256 accWomPerFactorShare) = calRewardPerUnit(_pid);

        UserInfo storage user = userInfo[_pid][_user];
        pendingRewards =
            ((user.amount * accWomPerShare + user.factor * accWomPerFactorShare) / ACC_TOKEN_PRECISION) +
            user.pendingWom -
            user.rewardDebt;

        // If it's a double reward farm, return info about the bonus token
        (bonusTokenAddresses, bonusTokenSymbols) = rewarderBonusTokenInfo(_pid);

        // aggregate result from both rewardewrs
        IMultiRewarder rewarder = poolInfoV3[_pid].rewarder;
        IBoostedMultiRewarder boostedRewarder = boostedRewarders[_pid];
        if (address(rewarder) != address(0) || address(boostedRewarder) != address(0)) {
            if (address(rewarder) == address(0)) {
                pendingBonusRewards = boostedRewarder.pendingTokens(_user);
            } else if (address(boostedRewarder) == address(0)) {
                pendingBonusRewards = rewarder.pendingTokens(_user);
            } else {
                uint256[] memory temp1 = rewarder.pendingTokens(_user);
                uint256[] memory temp2 = boostedRewarder.pendingTokens(_user);

                pendingBonusRewards = concatArrays(temp1, temp2);
            }
        }
    }

    /// @notice [Deprecated] A backward compatible function to return the PoolInfo struct in MasterWombatV2
    function poolInfo(
        uint256 _pid
    )
        external
        view
        returns (
            IERC20 lpToken,
            uint96 allocPoint,
            IMultiRewarder rewarder,
            uint256 sumOfFactors,
            uint104 accWomPerShare,
            uint104 accWomPerFactorShare,
            uint40 lastRewardTimestamp
        )
    {
        PoolInfoV3 memory pool = poolInfoV3[_pid];

        return (
            pool.lpToken,
            0,
            pool.rewarder,
            pool.sumOfFactors,
            pool.accWomPerShare,
            pool.accWomPerFactorShare,
            pool.lastRewardTimestamp
        );
    }

    function getSumOfFactors(uint256 _pid) external view override returns (uint256) {
        return poolInfoV3[_pid].sumOfFactors;
    }

    function _getRewardDebt(
        uint256 amount,
        uint256 accWomPerShare,
        uint256 factor,
        uint256 accWomPerFactorShare
    ) internal pure returns (uint128) {
        return to128((amount * accWomPerShare + factor * accWomPerFactorShare) / ACC_TOKEN_PRECISION);
    }

    function concatArrays(uint256[] memory A, uint256[] memory B) internal pure returns (uint256[] memory returnArr) {
        returnArr = new uint256[](A.length + B.length);

        uint256 i;
        for (; i < A.length; i++) {
            returnArr[i] = A[i];
        }

        for (uint256 j; j < B.length; ) {
            returnArr[i++] = B[j++];
        }
    }

    function concatArrays(IERC20[] memory A, IERC20[] memory B) internal pure returns (IERC20[] memory returnArr) {
        returnArr = new IERC20[](A.length + B.length);

        uint256 i;
        for (; i < A.length; i++) {
            returnArr[i] = A[i];
        }

        for (uint256 j; j < B.length; ) {
            returnArr[i++] = B[j++];
        }
    }

    function to128(uint256 val) internal pure returns (uint128) {
        if (val > type(uint128).max) revert('uint128 overflow');
        return uint128(val);
    }

    function to104(uint256 val) internal pure returns (uint104) {
        if (val > type(uint104).max) revert('uint104 overflow');
        return uint104(val);
    }
}

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

pragma solidity ^0.8.0;

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

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {
    address private _owner;

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    function __Ownable_init() internal onlyInitializing {
        __Ownable_init_unchained();
    }

    function __Ownable_init_unchained() internal onlyInitializing {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

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

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

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

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

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

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[49] private __gap;
}

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

pragma solidity ^0.8.2;

import "../../utils/AddressUpgradeable.sol";

/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
 * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
 * case an upgrade adds a module that needs to be initialized.
 *
 * For example:
 *
 * [.hljs-theme-light.nopadding]
 * ```solidity
 * contract MyToken is ERC20Upgradeable {
 *     function initialize() initializer public {
 *         __ERC20_init("MyToken", "MTK");
 *     }
 * }
 *
 * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
 *     function initializeV2() reinitializer(2) public {
 *         __ERC20Permit_init("MyToken");
 *     }
 * }
 * ```
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
 * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() {
 *     _disableInitializers();
 * }
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     * @custom:oz-retyped-from bool
     */
    uint8 private _initialized;

    /**
     * @dev Indicates that the contract is in the process of being initialized.
     */
    bool private _initializing;

    /**
     * @dev Triggered when the contract has been initialized or reinitialized.
     */
    event Initialized(uint8 version);

    /**
     * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
     * `onlyInitializing` functions can be used to initialize parent contracts.
     *
     * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a
     * constructor.
     *
     * Emits an {Initialized} event.
     */
    modifier initializer() {
        bool isTopLevelCall = !_initializing;
        require(
            (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1),
            "Initializable: contract is already initialized"
        );
        _initialized = 1;
        if (isTopLevelCall) {
            _initializing = true;
        }
        _;
        if (isTopLevelCall) {
            _initializing = false;
            emit Initialized(1);
        }
    }

    /**
     * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
     * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
     * used to initialize parent contracts.
     *
     * A reinitializer may be used after the original initialization step. This is essential to configure modules that
     * are added through upgrades and that require initialization.
     *
     * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`
     * cannot be nested. If one is invoked in the context of another, execution will revert.
     *
     * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
     * a contract, executing them in the right order is up to the developer or operator.
     *
     * WARNING: setting the version to 255 will prevent any future reinitialization.
     *
     * Emits an {Initialized} event.
     */
    modifier reinitializer(uint8 version) {
        require(!_initializing && _initialized < version, "Initializable: contract is already initialized");
        _initialized = version;
        _initializing = true;
        _;
        _initializing = false;
        emit Initialized(version);
    }

    /**
     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
     * {initializer} and {reinitializer} modifiers, directly or indirectly.
     */
    modifier onlyInitializing() {
        require(_initializing, "Initializable: contract is not initializing");
        _;
    }

    /**
     * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
     * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
     * to any version. It is recommended to use this to lock implementation contracts that are designed to be called
     * through proxies.
     *
     * Emits an {Initialized} event the first time it is successfully executed.
     */
    function _disableInitializers() internal virtual {
        require(!_initializing, "Initializable: contract is initializing");
        if (_initialized != type(uint8).max) {
            _initialized = type(uint8).max;
            emit Initialized(type(uint8).max);
        }
    }

    /**
     * @dev Returns the highest version that has been initialized. See {reinitializer}.
     */
    function _getInitializedVersion() internal view returns (uint8) {
        return _initialized;
    }

    /**
     * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.
     */
    function _isInitializing() internal view returns (bool) {
        return _initializing;
    }
}

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

pragma solidity ^0.8.0;

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

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

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

    bool private _paused;

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

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

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

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

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

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

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

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

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

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[49] private __gap;
}

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

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

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

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

    uint256 private _status;

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

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

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

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

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

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _status == _ENTERED;
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[49] private __gap;
}

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

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library AddressUpgradeable {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     *
     * 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 v4.4.1 (utils/Context.sol)

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

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract ContextUpgradeable is Initializable {
    function __Context_init() internal onlyInitializing {
    }

    function __Context_init_unchained() internal onlyInitializing {
    }
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[50] private __gap;
}

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

pragma solidity ^0.8.0;

import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.sol";

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * The default value of {decimals} is 18. To change this, you should override
 * this function so it returns a different value.
 *
 * We have followed general OpenZeppelin Contracts guidelines: functions revert
 * instead returning `false` on failure. This behavior is nonetheless
 * conventional and does not conflict with the expectations of ERC20
 * applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20, IERC20Metadata {
    mapping(address => uint256) private _balances;

    mapping(address => mapping(address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5.05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the default value returned by this function, unless
     * it's overridden.
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address to, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _transfer(owner, to, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
     * `transferFrom`. This is semantically equivalent to an infinite approval.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * NOTE: Does not update the allowance if the current allowance
     * is the maximum `uint256`.
     *
     * Requirements:
     *
     * - `from` and `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     * - the caller must have allowance for ``from``'s tokens of at least
     * `amount`.
     */
    function transferFrom(address from, address to, uint256 amount) public virtual override returns (bool) {
        address spender = _msgSender();
        _spendAllowance(from, spender, amount);
        _transfer(from, to, amount);
        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, allowance(owner, spender) + addedValue);
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        address owner = _msgSender();
        uint256 currentAllowance = allowance(owner, spender);
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(owner, spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    /**
     * @dev Moves `amount` of tokens from `from` to `to`.
     *
     * This internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     */
    function _transfer(address from, address to, uint256 amount) internal virtual {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(from, to, amount);

        uint256 fromBalance = _balances[from];
        require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[from] = fromBalance - amount;
            // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by
            // decrementing then incrementing.
            _balances[to] += amount;
        }

        emit Transfer(from, to, amount);

        _afterTokenTransfer(from, to, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply += amount;
        unchecked {
            // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above.
            _balances[account] += amount;
        }
        emit Transfer(address(0), account, amount);

        _afterTokenTransfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        unchecked {
            _balances[account] = accountBalance - amount;
            // Overflow not possible: amount <= accountBalance <= totalSupply.
            _totalSupply -= amount;
        }

        emit Transfer(account, address(0), amount);

        _afterTokenTransfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(address owner, address spender, uint256 amount) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @dev Updates `owner` s allowance for `spender` based on spent `amount`.
     *
     * Does not update the allowance amount in case of infinite allowance.
     * Revert if not enough allowance is available.
     *
     * Might emit an {Approval} event.
     */
    function _spendAllowance(address owner, address spender, uint256 amount) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance != type(uint256).max) {
            require(currentAllowance >= amount, "ERC20: insufficient allowance");
            unchecked {
                _approve(owner, spender, currentAllowance - amount);
            }
        }
    }

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual {}

    /**
     * @dev Hook that is called after any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * has been transferred to `to`.
     * - when `from` is zero, `amount` tokens have been minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens have been burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(address from, address to, uint256 amount) internal virtual {}
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

// 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 v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

// 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) (utils/structs/EnumerableSet.sol)
// This file was procedurally generated from scripts/generate/templates/EnumerableSet.js.

pragma solidity ^0.8.0;

/**
 * @dev Library for managing
 * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
 * types.
 *
 * Sets have the following properties:
 *
 * - Elements are added, removed, and checked for existence in constant time
 * (O(1)).
 * - Elements are enumerated in O(n). No guarantees are made on the ordering.
 *
 * ```solidity
 * contract Example {
 *     // Add the library methods
 *     using EnumerableSet for EnumerableSet.AddressSet;
 *
 *     // Declare a set state variable
 *     EnumerableSet.AddressSet private mySet;
 * }
 * ```
 *
 * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
 * and `uint256` (`UintSet`) are supported.
 *
 * [WARNING]
 * ====
 * Trying to delete such a structure from storage will likely result in data corruption, rendering the structure
 * unusable.
 * See https://github.com/ethereum/solidity/pull/11843[ethereum/solidity#11843] for more info.
 *
 * In order to clean an EnumerableSet, you can either remove all elements one by one or create a fresh instance using an
 * array of EnumerableSet.
 * ====
 */
library EnumerableSet {
    // To implement this library for multiple types with as little code
    // repetition as possible, we write it in terms of a generic Set type with
    // bytes32 values.
    // The Set implementation uses private functions, and user-facing
    // implementations (such as AddressSet) are just wrappers around the
    // underlying Set.
    // This means that we can only create new EnumerableSets for types that fit
    // in bytes32.

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

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

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

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

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

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

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

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

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

            return true;
        } else {
            return false;
        }
    }

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

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

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

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

    // Bytes32Set

    struct Bytes32Set {
        Set _inner;
    }

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

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

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

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

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

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

        /// @solidity memory-safe-assembly
        assembly {
            result := store
        }

        return result;
    }

    // AddressSet

    struct AddressSet {
        Set _inner;
    }

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

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

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

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

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

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

        /// @solidity memory-safe-assembly
        assembly {
            result := store
        }

        return result;
    }

    // UintSet

    struct UintSet {
        Set _inner;
    }

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

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

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

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

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

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

        /// @solidity memory-safe-assembly
        assembly {
            result := store
        }

        return result;
    }
}

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.5;

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

import './IMasterWombatV3.sol';
import './IBoostedMultiRewarder.sol';

/**
 * @dev Interface of BoostedMasterWombat
 */
interface IBoostedMasterWombat is IMasterWombatV3 {
    function getSumOfFactors(uint256 pid) external view returns (uint256 sum);

    function basePartition() external view returns (uint16);

    function add(IERC20 _lpToken, IBoostedMultiRewarder _boostedRewarder) external;

    function boostedRewarders(uint256 _pid) external view returns (IBoostedMultiRewarder);

    function setBoostedRewarder(uint256 _pid, IBoostedMultiRewarder _boostedRewarder) external;
}

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.5;

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

interface IBoostedMultiRewarder {
    function lpToken() external view returns (IERC20 lpToken);

    function onReward(
        address _user,
        uint256 _newLpAmount,
        uint256 _newFactor
    ) external returns (uint256[] memory rewards);

    function addRewardToken(IERC20 _rewardToken, uint40 _startTimestamp, uint96 _tokenPerSec) external;

    function pendingTokens(address _user) external view returns (uint256[] memory rewards);

    function rewardTokens() external view returns (IERC20[] memory tokens);

    function rewardLength() external view returns (uint256);

    function onUpdateFactor(address _user, uint256 _newFactor) external;
}

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.15;

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

interface IBribe {
    function onVote(
        address user,
        uint256 newVote,
        uint256 originalTotalVotes
    ) external returns (uint256[] memory rewards);

    function pendingTokens(address _user) external view returns (uint256[] memory rewards);

    function rewardTokens() external view returns (IERC20[] memory tokens);

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

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.15;

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

interface IBribeRewarderFactory {
    function isRewardTokenWhitelisted(IERC20 _token) external view returns (bool);
}

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.5;

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

/**
 * @dev Interface of the MasterWombatV3
 */
interface IMasterWombatV3 {
    function getAssetPid(address asset) external view returns (uint256 pid);

    function poolLength() external view returns (uint256);

    function pendingTokens(
        uint256 _pid,
        address _user
    )
        external
        view
        returns (
            uint256 pendingRewards,
            IERC20[] memory bonusTokenAddresses,
            string[] memory bonusTokenSymbols,
            uint256[] memory pendingBonusRewards
        );

    function rewarderBonusTokenInfo(
        uint256 _pid
    ) external view returns (IERC20[] memory bonusTokenAddresses, string[] memory bonusTokenSymbols);

    function massUpdatePools() external;

    function updatePool(uint256 _pid) external;

    function deposit(uint256 _pid, uint256 _amount) external returns (uint256, uint256[] memory);

    function multiClaim(
        uint256[] memory _pids
    ) external returns (uint256 transfered, uint256[] memory rewards, uint256[][] memory additionalRewards);

    function withdraw(uint256 _pid, uint256 _amount) external returns (uint256, uint256[] memory);

    function emergencyWithdraw(uint256 _pid) external;

    function migrate(uint256[] calldata _pids) external;

    function depositFor(uint256 _pid, uint256 _amount, address _user) external;

    function updateFactor(address _user, uint256 _newVeWomBalance) external;

    function notifyRewardAmount(address _lpToken, uint256 _amount) external;
}

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.5;

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

interface IMultiRewarder {
    function lpToken() external view returns (IERC20 lpToken);

    function onReward(address _user, uint256 _lpAmount) external returns (uint256[] memory rewards);

    function pendingTokens(address _user) external view returns (uint256[] memory rewards);

    function rewardTokens() external view returns (IERC20[] memory tokens);

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

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.5;

/**
 * @dev Interface of the VeWom
 */
interface IVeWom {
    struct Breeding {
        uint48 unlockTime;
        uint104 womAmount;
        uint104 veWomAmount;
    }

    struct UserInfo {
        // reserve usage for future upgrades
        uint256[10] reserved;
        Breeding[] breedings;
    }

    function totalSupply() external view returns (uint256);

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

    function isUser(address _addr) external view returns (bool);

    function getUserOverview(address _addr) external view returns (uint256 womLocked, uint256 veWomBalance);

    function getUserInfo(address addr) external view returns (UserInfo memory);

    function mint(uint256 amount, uint256 lockDays) external returns (uint256 veWomAmount);

    function burn(uint256 slot) external;

    function update(uint256 slot, uint256 lockDays) external returns (uint256 newVeWomAmount);
}

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.15;

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

import './IBribe.sol';

interface IGauge {
    function notifyRewardAmount(IERC20 token, uint256 amount) external;
}

interface IVoter {
    struct GaugeWeight {
        uint128 allocPoint;
        uint128 voteWeight; // total amount of votes for an LP-token
    }

    function infos(
        IERC20 _lpToken
    )
        external
        view
        returns (
            uint104 supplyBaseIndex,
            uint104 supplyVoteIndex,
            uint40 nextEpochStartTime,
            uint128 claimable,
            bool whitelist,
            IGauge gaugeManager,
            IBribe bribe
        );

    // lpToken => weight, equals to sum of votes for a LP token
    function weights(IERC20 _lpToken) external view returns (uint128 allocPoint, uint128 voteWeight);

    // user address => lpToken => votes
    function votes(address _user, IERC20 _lpToken) external view returns (uint256);

    function setBribe(IERC20 _lpToken, IBribe _bribe) external;

    function distribute(IERC20 _lpToken) external;
}

// SPDX-License-Identifier: GPL-3.0

/// math.sol -- mixin for inline numerical wizardry

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity ^0.8.5;

library DSMath {
    uint256 public constant WAD = 10 ** 18;

    // Babylonian Method
    function sqrt(uint256 y) internal pure returns (uint256 z) {
        if (y > 3) {
            z = y;
            uint256 x = y / 2 + 1;
            while (x < z) {
                z = x;
                x = (y / x + x) / 2;
            }
        } else if (y != 0) {
            z = 1;
        }
    }

    // Babylonian Method with initial guess
    function sqrt(uint256 y, uint256 guess) internal pure returns (uint256 z) {
        if (y > 3) {
            if (guess > y || guess == 0) {
                z = y;
            } else {
                z = guess;
            }
            uint256 x = (y / z + z) / 2;
            while (x != z) {
                z = x;
                x = (y / x + x) / 2;
            }
        } else if (y != 0) {
            z = 1;
        }
    }

    //rounds to zero if x*y < WAD / 2
    function wmul(uint256 x, uint256 y) internal pure returns (uint256) {
        return ((x * y) + (WAD / 2)) / WAD;
    }

    function wdiv(uint256 x, uint256 y) internal pure returns (uint256) {
        return ((x * WAD) + (y / 2)) / y;
    }
}

{
  "viaIR": true,
  "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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IBoostedMultiRewarder","name":"boostedRewarder","type":"address"}],"name":"Add","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"uint256","name":"pid","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Deposit","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"uint256","name":"pid","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"DepositFor","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"uint256","name":"pid","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"EmergencyWithdraw","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"owner","type":"address"},{"indexed":false,"internalType":"uint256","name":"balance","type":"uint256"}],"name":"EmergencyWomWithdraw","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"uint256","name":"pid","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Harvest","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint8","name":"version","type":"uint8"}],"name":"Initialized","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"}],"name":"Paused","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"pid","type":"uint256"},{"indexed":false,"internalType":"contract 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IERC20[]","name":"bonusTokenAddresses","type":"address[]"},{"internalType":"string[]","name":"bonusTokenSymbols","type":"string[]"},{"internalType":"uint256[]","name":"pendingBonusRewards","type":"uint256[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_pid","type":"uint256"}],"name":"poolInfo","outputs":[{"internalType":"contract IERC20","name":"lpToken","type":"address"},{"internalType":"uint96","name":"allocPoint","type":"uint96"},{"internalType":"contract IMultiRewarder","name":"rewarder","type":"address"},{"internalType":"uint256","name":"sumOfFactors","type":"uint256"},{"internalType":"uint104","name":"accWomPerShare","type":"uint104"},{"internalType":"uint104","name":"accWomPerFactorShare","type":"uint104"},{"internalType":"uint40","name":"lastRewardTimestamp","type":"uint40"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"poolInfoV3","outputs":[{"internalType":"contract IERC20","name":"lpToken","type":"address"},{"internalType":"contract IMultiRewarder","name":"rewarder","type":"address"},{"internalType":"uint40","name":"periodFinish","type":"uint40"},{"internalType":"uint128","name":"sumOfFactors","type":"uint128"},{"internalType":"uint128","name":"rewardRate","type":"uint128"},{"internalType":"uint104","name":"accWomPerShare","type":"uint104"},{"internalType":"uint104","name":"accWomPerFactorShare","type":"uint104"},{"internalType":"uint40","name":"lastRewardTimestamp","type":"uint40"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"poolLength","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_pid","type":"uint256"}],"name":"rewarderBonusTokenInfo","outputs":[{"internalType":"contract IERC20[]","name":"bonusTokenAddresses","type":"address[]"},{"internalType":"string[]","name":"bonusTokenSymbols","type":"string[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_pid","type":"uint256"},{"internalType":"contract IBoostedMultiRewarder","name":"_boostedRewarder","type":"address"}],"name":"setBoostedRewarder","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IBribeRewarderFactory","name":"_bribeRewarderFactory","type":"address"}],"name":"setBribeRewarderFactory","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IMasterWombatV3","name":"_newMasterWombat","type":"address"}],"name":"setNewMasterWombat","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_pid","type":"uint256"},{"internalType":"contract IMultiRewarder","name":"_rewarder","type":"address"}],"name":"setRewarder","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IVeWom","name":"_newVeWom","type":"address"}],"name":"setVeWom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_newVoter","type":"address"}],"name":"setVoter","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IERC20","name":"_newWom","type":"address"}],"name":"setWom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"unpause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint16","name":"_basePartition","type":"uint16"}],"name":"updateEmissionPartition","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_user","type":"address"},{"internalType":"uint256","name":"_newVeWomBalance","type":"uint256"}],"name":"updateFactor","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_pid","type":"uint256"}],"name":"updatePool","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"address","name":"","type":"address"}],"name":"userInfo","outputs":[{"internalType":"uint128","name":"amount","type":"uint128"},{"internalType":"uint128","name":"factor","type":"uint128"},{"internalType":"uint128","name":"rewardDebt","type":"uint128"},{"internalType":"uint128","name":"pendingWom","type":"uint128"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"veWom","outputs":[{"internalType":"contract IVeWom","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"voter","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_pid","type":"uint256"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"withdraw","outputs":[{"internalType":"uint256","name":"reward","type":"uint256"},{"internalType":"uint256[]","name":"additionalRewards","type":"uint256[]"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"wom","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"}]

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