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//SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.20;

import "./oz/interfaces/IERC20.sol";
import "./oz/libraries/SafeERC20.sol";
import "./oz/utils/ReentrancyGuard.sol";
import "./libraries/QuestDataTypes.sol";
import "./interfaces/IQuestBoard.sol";
import "./interfaces/IRingsVoter.sol";
import "./MultiMerkleDistributor.sol";
import "./utils/Owner.sol";
import "./libraries/Errors.sol";

/** @title Warden Quest Board V2 - Rings protocol version  */
/// @author Paladin
/*
    V2 of Quest Board allowing to blacklist or whitelist veNFTs for Rings protocol
    and chose between fixed or ranged rewards distribution
*/

contract QuestBoardRings is IQuestBoard, Owner, ReentrancyGuard {
    using SafeERC20 for IERC20;

    // Storage

    /** @notice Address of the Voter contract */
    address public immutable VOTER;

    /** @notice Amount of decimals for the veNFT */
    uint256 public immutable VOTE_TOKEN_DECIMALS;

    /** @notice Seconds in a Week */
    uint256 private constant WEEK = 604800;
    /** @notice 1e18 scale */
    uint256 private constant UNIT = 1e18;
    /** @notice Max BPS value (100%) */
    uint256 private constant MAX_BPS = 10000;
    /** @notice Delay where contract can be unkilled */
    uint256 private constant KILL_DELAY = 2 * 604800; //2 weeks
    /** @notice Max VoterList size */
    uint256 private constant MAX_VOTERLIST_SIZE = 10;

    /** @notice ID for the next Quest to be created */
    uint256 public nextID;

    /** @notice List of Quest (indexed by ID) */
    // ID => Quest
    mapping(uint256 => Quest) public quests;
    /** @notice List of timestamp periods the Quest is active in */
    // QuestID => Periods (timestamps)
    mapping(uint256 => uint48[]) private questPeriods;
    /** @notice Mapping of all state for each period of each Quest */
    // QuestID => period => QuestDataTypes.PeriodState
    mapping(uint256 => mapping(uint256 => QuestDataTypes.PeriodState)) public periodStateByQuest;
    /** @notice Mapping of distributed reward amounts for each period of each Quest */
    // QuestID => period => uint256
    mapping(uint256 => mapping(uint256 => uint256)) public periodAmountDistributedByQuest;
    /** @notice Original Reward per period for Rollover Quests */
    // ID => amount
    mapping(uint256 => uint256) public originalRewardPerPeriod;
    /** @notice Used Reward per period for Rollover Quests (when closing a period) */
    // ID => period => amount
    mapping(uint256 => mapping(uint256 => uint256)) private usedRewardPerPeriod;
    /** @notice All the Quests present in this period */
    // period => array of Quest
    mapping(uint256 => uint256[]) private questsByPeriod;
    /** @notice All the Quests present in this period for each gauge */
    // gauge => period => array of Quest
    mapping(address => mapping(uint256 => uint256[])) private questsByGaugeByPeriod;
    /** @notice Mapping of Distributors used by each Quest to send rewards */
    // ID => Distributor
    mapping(uint256 => address) public questDistributors;
    /** @notice Amount not distributed, for Quest creators to redeem */
    mapping(uint256 => uint256) public questWithdrawableAmount;

    /** @notice Mapping of voter list (blacklist or whitelist) for each Quest, as NFT IDs */
    // ID => VoterList
    mapping(uint256 => uint256[]) private questVoterList;


    /** @notice Platform fees ratio (in BPS) */
    uint256 public platformFeeRatio = 400;
    /** @notice Mapping of specific fee ratio for some Quest creators */
    // Creator => specific fee
    mapping(address => uint256) public customPlatformFeeRatio;

    /** @notice Minimum Objective required */
    uint256 public objectiveMinimalThreshold;

    /** @notice Address of the Chest to receive platform fees */
    address public questChest;
    /** @notice Address of the reward Distributor contract */
    address public distributor;

    /** @notice Mapping of addresses allowed to call manager methods */
    mapping(address => bool) private approvedManagers;
    /** @notice Whitelisted tokens that can be used as reward tokens */
    mapping(address => bool) public whitelistedTokens;
    /** @notice Min rewardPerVote per token (to avoid spam creation of useless Quest) */
    mapping(address => uint256) public minRewardPerVotePerToken;

    /** @notice Boolean, true if the cotnract was killed, stopping main user functions */
    bool public isKilled;
    /** @notice Timestamp when the contract was killed */
    uint256 public killTs;

    

    // Modifiers

    /** @notice Check the caller is either the admin or an approved manager */
    modifier onlyAllowed(){
        if(!approvedManagers[msg.sender] && msg.sender != owner()) revert Errors.CallerNotAllowed();
        _;
    }

    /** @notice Check that contract was not killed */
    modifier isAlive(){
        if(isKilled) revert Errors.Killed();
        _;
    }

    /** @notice Check that contract was initialized */
    modifier isInitialized(){
        if(distributor == address(0)) revert Errors.NotInitialized();
        _;
    }


    // Constructor
    constructor(address _voter, address _chest, uint256 _veNFTDecimals){
        if(
            _voter == address(0)
            || _chest == address(0)
        ) revert Errors.AddressZero();

        VOTER = _voter;

        questChest = _chest;

        VOTE_TOKEN_DECIMALS = _veNFTDecimals;

        objectiveMinimalThreshold = 100 * UNIT;
    }

   
    /**
    * @notice Initialize the contract
    * @param _distributor Address of the Distributor
    */
    function init(address _distributor) external onlyOwner {
        if(distributor != address(0)) revert Errors.AlreadyInitialized();
        if(_distributor == address(0)) revert Errors.AddressZero();

        distributor = _distributor;

        emit Init(_distributor);
    }


    // View Functions
   
    /**
    * @notice Returns the current Period for the contract
    * @dev Returns the current Period for the contract
    */
    function getCurrentPeriod() public view returns(uint256) {
        return (block.timestamp / WEEK) * WEEK;
    }
   
    /**
    * @notice Returns the list of all Quest IDs active on a given period
    * @dev Returns the list of all Quest IDs active on a given period
    * @param period Timestamp of the period
    * @return uint256[] : Quest IDs for the period
    */
    function getQuestIdsForPeriodForGauge(address gauge, uint256 period) external view returns(uint256[] memory) {
        period = (period / WEEK) * WEEK;
        return questsByGaugeByPeriod[gauge][period];
    }
   
    /**
    * @notice Returns the list of all Quest IDs active on a given period
    * @dev Returns the list of all Quest IDs active on a given period
    * @param period Timestamp of the period
    * @return uint256[] : Quest IDs for the period
    */
    function getQuestIdsForPeriod(uint256 period) external view returns(uint256[] memory) {
        period = (period / WEEK) * WEEK;
        return questsByPeriod[period];
    }
   
    /**
    * @notice Returns all periods for a Quest
    * @dev Returns all period timestamps for a Quest ID
    * @param questID ID of the Quest
    * @return uint256[] : List of period timestamps
    */
    function getAllPeriodsForQuestId(uint256 questID) external view returns(uint48[] memory) {
        return questPeriods[questID];
    }
   
    /**
    * @notice Returns the number of periods to come for a given Quest
    * @dev Returns the number of periods to come for a given Quest
    * @param questID ID of the Quest
    * @return uint : remaining duration (non active periods)
    */
    function _getRemainingDuration(uint256 questID) internal view returns(uint256) {
        // Since we have the current period, the start period for the Quest, and each period is 1 WEEK
        // We can find the number of remaining periods in the Quest simply by dividing the remaining time between
        // currentPeriod and the last QuestPeriod start, plus 1 WEEK, by a WEEK.
        // If the current period is the last period of the Quest, we want to return 1
        if(questPeriods[questID].length == 0) revert Errors.EmptyQuest();
        uint256 lastPeriod = questPeriods[questID][questPeriods[questID].length - 1];
        uint256 currentPeriod = getCurrentPeriod();
        return lastPeriod < currentPeriod ? 0: ((lastPeriod - currentPeriod) + WEEK) / WEEK;
    }

    /**
    * @notice Returns the address of the Quest creator
    * @dev Returns the address of the Quest creator
    * @param questID ID of the Quest
    * @return address : creator of the Quest
    */
    function getQuestCreator(uint256 questID) external view returns(address){
        return quests[questID].creator;
    }

    /**
    * @notice Returns the voter list for a given Quest
    * @param questID ID of the Quest
    * @return uint256[] : vote list
    */
    function getQuestVoterList(uint256 questID) external view returns(uint256[] memory){
        return questVoterList[questID];
    }

    /**
    * @notice Returns the current reduced bias for a given gauge (based on a Quest's voter list)
    * @param questID ID of the Quest
    * @return uint256 : current reduced bias
    */
    function getCurrentReducedBias(uint256 questID) external view returns(uint256) {
        uint256 nextPeriod = getCurrentPeriod() + WEEK;

        return getReducedBias(nextPeriod, questID);
    }

    function _convertVotes(uint256 votes) internal view returns(uint256) {
        if(VOTE_TOKEN_DECIMALS == 18) return votes;
        else if(VOTE_TOKEN_DECIMALS > 18) {
            return votes / (10 ** (VOTE_TOKEN_DECIMALS - 18));
        }
        else {
            return votes * (10 ** (18 - VOTE_TOKEN_DECIMALS));
        }
    }

    /**
    * @notice Returns the reduced bias for a given gauge for a given period (based on a Quest's voter list)
    * @param period timestamp of the period
    * @param questID ID of the Quest
    * @return uint256 : current reduced bias
    */
    function getReducedBias(uint256 period, uint256 questID) public view returns(uint256) {
        uint256[] memory voterList = questVoterList[questID];
        address gauge = quests[questID].gauge;
        QuestDataTypes.QuestVoteType questType = quests[questID].types.voteType;

        IRingsVoter voter = IRingsVoter(VOTER);

        uint256 voterListSumBias;

        uint256 voterListLength = voterList.length;
            for(uint256 i; i < voterListLength;) {
                uint256 userVotes = _convertVotes(voter.getNftVotesOnGaugeAtPeriod(voterList[i], gauge, period));
                voterListSumBias += userVotes;
                unchecked { i++; }
            }

        // For a WHITELIST type, simply return the sum of voters bias
        if(questType == QuestDataTypes.QuestVoteType.WHITELIST) return voterListSumBias;

        // Get the bias of the Gauge for the given period
        uint256 periodAdjustedBias = _convertVotes(voter.getGaugeVotesAtPeriod(gauge, period));

        // If the Quest is a Blacklist, we need to remove the bias of the voters
        if(questType == QuestDataTypes.QuestVoteType.BLACKLIST) {
            periodAdjustedBias = voterListSumBias >= periodAdjustedBias ? 0 : periodAdjustedBias - voterListSumBias;
        }
        
        return periodAdjustedBias;
    }

    // Functions

    /**
    * @notice Creates a fixed rewards Quest based on the given parameters
    * @dev Creates a Quest based on the given parameters & the given types with the Fixed Rewards type
    * @param gauge Address of the gauge
    * @param rewardToken Address of the reward token
    * @param startNextPeriod (bool) true to start the Quest the next period
    * @param duration Duration of the Quest (in weeks)
    * @param rewardPerVote Amount of reward/vote (in wei)
    * @param totalRewardAmount Total amount of rewards available for the full Quest duration
    * @param feeAmount Amount of fees paid at creation
    * @param voteType Vote type for the Quest
    * @param closeType Close type for the Quest
    * @param voterList List of veNFT IDs for the Quest (to be used for Blacklist or Whitelist)
    * @return uint256 : ID of the newly created Quest
    */
    function createFixedQuest(
        address gauge,
        address rewardToken,
        bool startNextPeriod,
        uint48 duration,
        uint256 rewardPerVote,
        uint256 totalRewardAmount,
        uint256 feeAmount,
        QuestDataTypes.QuestVoteType voteType,
        QuestDataTypes.QuestCloseType closeType,
        uint256[] calldata voterList
    ) external nonReentrant isAlive isInitialized returns(uint256) {
        // Set the Quest Types for the new Quest
        QuestTypes memory types = QuestTypes({
            voteType: voteType,
            rewardsType: QuestDataTypes.QuestRewardsType.FIXED,
            closeType: closeType
        });

        return _createQuest(
            gauge,
            rewardToken,
            types,
            startNextPeriod,
            duration,
            rewardPerVote,
            rewardPerVote,
            totalRewardAmount,
            feeAmount,
            voterList
        );
    }

    /**
    * @notice Creates a ranged rewards Quest based on the given parameters
    * @dev Creates a Quest based on the given parameters & the given types with the Ranged Rewards type
    * @param gauge Address of the gauge
    * @param rewardToken Address of the reward token
    * @param startNextPeriod (bool) true to start the Quest the next period
    * @param duration Duration of the Quest (in weeks)
    * @param minRewardPerVote Minimum amount of reward/vote (in wei)
    * @param maxRewardPerVote Maximum amount of reward/vote (in wei)
    * @param totalRewardAmount Total amount of rewards available for the full Quest duration
    * @param feeAmount Amount of fees paid at creation
    * @param voteType Vote type for the Quest
    * @param closeType Close type for the Quest
    * @param voterList List of veNFT IDs for the Quest (to be used for Blacklist or Whitelist)
    * @return uint256 : ID of the newly created Quest
    */
    function createRangedQuest(
        address gauge,
        address rewardToken,
        bool startNextPeriod,
        uint48 duration,
        uint256 minRewardPerVote,
        uint256 maxRewardPerVote,
        uint256 totalRewardAmount,
        uint256 feeAmount,
        QuestDataTypes.QuestVoteType voteType,
        QuestDataTypes.QuestCloseType closeType,
        uint256[] calldata voterList
    ) external nonReentrant isAlive isInitialized returns(uint256) {
        // Set the Quest Types for the new Quest
        QuestTypes memory types = QuestTypes({
            voteType: voteType,
            rewardsType: QuestDataTypes.QuestRewardsType.RANGE,
            closeType: closeType
        });

        return _createQuest(
            gauge,
            rewardToken,
            types,
            startNextPeriod,
            duration,
            minRewardPerVote,
            maxRewardPerVote,
            totalRewardAmount,
            feeAmount,
            voterList
        );
    }

    /**
    * @notice Creates a Quest based on the given parameters
    * @dev Creates a Quest based on the given parameters & the given types
    * @param gauge Address of the gauge
    * @param rewardToken Address of the reward token
    * @param types Quest Types (Rewards, Vote & Close)
    * @param startNextPeriod (bool) true to start the Quest the next period
    * @param duration Duration of the Quest (in weeks)
    * @param minRewardPerVote Minimum amount of reward/vote (in wei)
    * @param maxRewardPerVote Maximum amount of reward/vote (in wei)
    * @param totalRewardAmount Total amount of rewards available for the full Quest duration
    * @param feeAmount Amount of fees paid at creation
    * @param voterList List of veNFT IDs for the Quest (to be used for Blacklist or Whitelist)
    * @return newQuestID (uint256) : ID of the newly created Quest
    */
    function _createQuest(
        address gauge,
        address rewardToken,
        QuestTypes memory types,
        bool startNextPeriod,
        uint48 duration,
        uint256 minRewardPerVote,
        uint256 maxRewardPerVote,
        uint256 totalRewardAmount,
        uint256 feeAmount,
        uint256[] calldata voterList
    ) internal returns(uint256 newQuestID) {
        // Local memory variables
        CreateVars memory vars;
        vars.creator = msg.sender;

        // Check all parameters
        if(gauge == address(0) || rewardToken == address(0)) revert Errors.AddressZero();
        if(!(IRingsVoter(VOTER).isGauge(gauge) && IRingsVoter(VOTER).isAlive(gauge))) revert Errors.InvalidGauge();
        if(!whitelistedTokens[rewardToken]) revert Errors.TokenNotWhitelisted();
        if(duration == 0) revert Errors.IncorrectDuration();
        if(minRewardPerVote == 0 || maxRewardPerVote == 0 || totalRewardAmount == 0 || feeAmount == 0) revert Errors.NullAmount();
        if(minRewardPerVote < minRewardPerVotePerToken[rewardToken]) revert Errors.RewardPerVoteTooLow();
        if(minRewardPerVote > maxRewardPerVote) revert Errors.MinValueOverMaxValue();
        if(types.rewardsType == QuestDataTypes.QuestRewardsType.FIXED && minRewardPerVote != maxRewardPerVote) revert Errors.InvalidQuestType();
        if((totalRewardAmount * _getFeeRatio(msg.sender))/MAX_BPS != feeAmount) revert Errors.IncorrectFeeAmount();
        if(types.closeType == QuestDataTypes.QuestCloseType.DISTRIBUTE) revert Errors.QuestTypeForbidden();

        // Calculate the reward per period, and the max vote objective per period
        vars.rewardPerPeriod = totalRewardAmount / duration;

        vars.minObjective = (vars.rewardPerPeriod * UNIT) / maxRewardPerVote;

        if(vars.minObjective < objectiveMinimalThreshold) revert Errors.ObjectiveTooLow();

        // Pull all the rewards in this contract
        IERC20(rewardToken).safeTransferFrom(vars.creator, address(this), totalRewardAmount);
        // And transfer the fees from the Quest creator to the Chest contract
        IERC20(rewardToken).safeTransferFrom(vars.creator, questChest, feeAmount);

        // Get the period when the Quest starts (current or next period)
        vars.startPeriod = getCurrentPeriod();
        if(startNextPeriod) vars.startPeriod += WEEK;

        // Get the ID for that new Quest and increment the nextID counter
        newQuestID = nextID;
        unchecked{ ++nextID; }

        // Fill the Quest struct data
        quests[newQuestID] = Quest({
            creator: vars.creator,
            rewardToken: rewardToken,
            gauge: gauge,
            duration: duration,
            periodStart: safe48(vars.startPeriod),
            totalRewardAmount: totalRewardAmount,
            rewardAmountPerPeriod: vars.rewardPerPeriod,
            minRewardPerVote: minRewardPerVote,
            maxRewardPerVote: maxRewardPerVote,
            minObjectiveVotes: vars.minObjective,
            maxObjectiveVotes: (vars.rewardPerPeriod * UNIT) / minRewardPerVote,
            types: types
        });

        //Set the current Distributor as the one to receive the rewards for users for that Quest
        questDistributors[newQuestID] = distributor;

        // Iterate on periods based on Quest duration
        vars.periodIterator = vars.startPeriod;
        for(uint256 i; i < duration;){
            // Add the Quest on the list of Quests active on the period
            questsByPeriod[vars.periodIterator].push(newQuestID);
            questsByGaugeByPeriod[gauge][vars.periodIterator].push(newQuestID);

            // Set the state of the period as ACTIVE
            periodStateByQuest[newQuestID][vars.periodIterator] = QuestDataTypes.PeriodState.ACTIVE;

            // And add the period in the list of periods of the Quest
            questPeriods[newQuestID].push(safe48(vars.periodIterator));

            vars.periodIterator += WEEK;

            unchecked{ ++i; }
        }

        vars.voterLength = voterList.length;
        if(vars.voterLength > 0) {
            if(vars.voterLength > MAX_VOTERLIST_SIZE) revert Errors.MaxListSize();

            for(uint256 i; i < vars.voterLength;){
                _addToVoterList(newQuestID, voterList[i]);
                unchecked { ++i; }
            }
        }

        if(types.closeType == QuestDataTypes.QuestCloseType.ROLLOVER){
            originalRewardPerPeriod[newQuestID] = vars.rewardPerPeriod;
        }

        // Add that Quest & the reward token in the Distributor
        if(!MultiMerkleDistributor(distributor).addQuest(newQuestID, rewardToken)) revert Errors.DisitributorFail();

        emit NewQuest(
            newQuestID,
            msg.sender,
            gauge,
            rewardToken,
            duration,
            vars.startPeriod
        );
    }

    /**
    * @notice Adds a given address to a Quest's voter list
    * @dev Adds a given address to a Quest's voter list
    * @param questID ID of the Quest
    * @param nftID ID of the veNFT
    */
    function _addToVoterList(uint256 questID, uint256 nftID) internal {
        //We don't want to have 2x the same address in the list
        uint256[] memory _list = questVoterList[questID];
        uint256 length = _list.length;
        for(uint256 i; i < length;){
            if(_list[i] == nftID) revert Errors.AlreadyListed();
            unchecked {
                ++i;
            }
        }

        questVoterList[questID].push(nftID);
    }

    /**
    * @notice Increases the duration of a Quest
    * @dev Adds more QuestPeriods and extends the duration of a Quest
    * @param questID ID of the Quest
    * @param addedDuration Number of period to add
    * @param addedRewardAmount Amount of reward to add for the new periods (in wei)
    * @param feeAmount Platform fees amount (in wei)
    */
    function extendQuestDuration(
        uint256 questID,
        uint48 addedDuration,
        uint256 addedRewardAmount,
        uint256 feeAmount
    ) external nonReentrant isAlive isInitialized {
        // Local memory variables
        ExtendVars memory vars;

        if(questID >= nextID) revert Errors.InvalidQuestID();
        if(msg.sender != quests[questID].creator) revert Errors.CallerNotAllowed();
        if(addedRewardAmount == 0 || feeAmount == 0) revert Errors.NullAmount();
        if(addedDuration == 0) revert Errors.IncorrectAddDuration();

        // We take data from the last period of the Quest to account for any other changes in the Quest parameters
        if(questPeriods[questID].length == 0) revert Errors.EmptyQuest();
        vars.lastPeriod = questPeriods[questID][questPeriods[questID].length - 1];
        
        if(quests[questID].periodStart >= block.timestamp) revert Errors.QuestNotStarted();
        if(vars.lastPeriod < getCurrentPeriod()) revert Errors.ExpiredQuest();

        // Check that the given amounts are correct
        vars.rewardPerPeriod = quests[questID].rewardAmountPerPeriod;
        if(quests[questID].types.closeType == QuestDataTypes.QuestCloseType.ROLLOVER){
            vars.rewardPerPeriod = originalRewardPerPeriod[questID];
        }

        if((vars.rewardPerPeriod * addedDuration) != addedRewardAmount) revert Errors.IncorrectAddedRewardAmount();
        if((addedRewardAmount * _getFeeRatio(msg.sender))/MAX_BPS != feeAmount) revert Errors.IncorrectFeeAmount();

        vars.gauge = quests[questID].gauge;
        vars.rewardToken = quests[questID].rewardToken;
        // Pull all the rewards in this contract
        IERC20(vars.rewardToken).safeTransferFrom(msg.sender, address(this), addedRewardAmount);
        // And transfer the fees from the Quest creator to the Chest contract
        IERC20(vars.rewardToken).safeTransferFrom(msg.sender, questChest, feeAmount);

        vars.periodIterator = ((vars.lastPeriod + WEEK) / WEEK) * WEEK;

        // Update the Quest struct with added reward admounts & added duration
        quests[questID].totalRewardAmount += addedRewardAmount;
        quests[questID].duration += addedDuration;

        // Add QuestPeriods for the new added duration
        for(uint256 i; i < addedDuration;){
            questsByPeriod[vars.periodIterator].push(questID);
            questsByGaugeByPeriod[quests[questID].gauge][vars.periodIterator].push(questID);

            questPeriods[questID].push(safe48(vars.periodIterator));

            // Set the state of the period as ACTIVE
            periodStateByQuest[questID][vars.periodIterator] = QuestDataTypes.PeriodState.ACTIVE;

            vars.periodIterator += WEEK;

            unchecked{ ++i; }
        }

        emit ExtendQuestDuration(questID, addedDuration, addedRewardAmount);

    }
      
    /**
    * @notice Updates the parametes of the Quest
    * @dev Updates the reward/vote parameters, allowing to update the Quest objectives too
    * @param questID ID of the Quest
    * @param newMinRewardPerVote New min reward/vote value (in wei)
    * @param newMaxRewardPerVote New max reward/vote value (in wei)
    * @param addedPeriodRewardAmount Amount of reward to add for each period (in wei)
    * @param addedTotalRewardAmount Amount of reward to add for all periods (in wei)
    * @param feeAmount Platform fees amount (in wei)
    */
    function updateQuestParameters(
        uint256 questID,
        uint256 newMinRewardPerVote,
        uint256 newMaxRewardPerVote,
        uint256 addedPeriodRewardAmount,
        uint256 addedTotalRewardAmount,
        uint256 feeAmount
    ) external nonReentrant isAlive isInitialized {
        // Local memory variables
        UpdateVars memory vars;

        Quest storage _quest = quests[questID];

        if(questID >= nextID) revert Errors.InvalidQuestID();
        if(msg.sender != _quest.creator) revert Errors.CallerNotAllowed();
        if(newMinRewardPerVote == 0 || newMaxRewardPerVote == 0) revert Errors.NullAmount();
        if(newMinRewardPerVote > newMaxRewardPerVote) revert Errors.MinValueOverMaxValue();
        if(_quest.types.rewardsType == QuestDataTypes.QuestRewardsType.FIXED && newMinRewardPerVote != newMaxRewardPerVote) revert Errors.InvalidQuestType();

        // Check the reamining duration, and that the given reward amounts are correct
        vars.remainingDuration = _getRemainingDuration(questID); //Also handles the Empty Quest check
        if(vars.remainingDuration == 0) revert Errors.ExpiredQuest();
        if(_quest.periodStart >= block.timestamp) revert Errors.QuestNotStarted();
        if((addedPeriodRewardAmount * vars.remainingDuration) != addedTotalRewardAmount) revert Errors.IncorrectAddedRewardAmount();
        if((addedTotalRewardAmount * _getFeeRatio(msg.sender))/MAX_BPS != feeAmount) revert Errors.IncorrectFeeAmount();

        // The new min reward amount must be higher 
        vars.currentPeriod = getCurrentPeriod();
        if(newMinRewardPerVote < _quest.minRewardPerVote) revert Errors.LowerRewardPerVote();

        // Get the amount of reward for each period
        vars.newRewardPerPeriod = _quest.rewardAmountPerPeriod + addedPeriodRewardAmount;
        if(quests[questID].types.closeType == QuestDataTypes.QuestCloseType.ROLLOVER){
            originalRewardPerPeriod[questID] += addedPeriodRewardAmount;
        }

        // Calculate the new max vote objective, and the min vote objective based on the Quest Rewards type
        vars.newMaxObjective = (vars.newRewardPerPeriod * UNIT) / newMinRewardPerVote;
        vars.newMinObjective;
        if(_quest.types.rewardsType == QuestDataTypes.QuestRewardsType.RANGE) {
            vars.newMinObjective = (vars.newRewardPerPeriod * UNIT) / newMaxRewardPerVote;
        } else {
            vars.newMinObjective = vars.newMaxObjective;
        }
        
        if(vars.newMinObjective < _quest.minObjectiveVotes) revert Errors.NewObjectiveTooLow();

        if(addedTotalRewardAmount > 0) {
            address rewardToken = _quest.rewardToken;
            // Pull all the rewards in this contract
            IERC20(rewardToken).safeTransferFrom(msg.sender, address(this), addedTotalRewardAmount);
            // And transfer the fees from the Quest creator to the Chest contract
            IERC20(rewardToken).safeTransferFrom(msg.sender, questChest, feeAmount);
        }

        // Update the Quest struct with the added reward amount
        _quest.totalRewardAmount += addedTotalRewardAmount;
        _quest.minRewardPerVote = newMinRewardPerVote;
        _quest.maxRewardPerVote = newMaxRewardPerVote;
        _quest.minObjectiveVotes = vars.newMinObjective;
        _quest.maxObjectiveVotes = vars.newMaxObjective;
        _quest.rewardAmountPerPeriod = vars.newRewardPerPeriod;

        emit UpdateQuestParameters(
            questID,
            vars.currentPeriod,
            newMinRewardPerVote,
            newMaxRewardPerVote,
            addedPeriodRewardAmount
        );
    }

    /**
    * @notice Adds a given list of addresses to a Quest's voter list
    * @param questID ID of the Quest
    * @param nftIDs list of veNFT IDs
    */
    function addToVoterList(uint256 questID, uint256[] calldata nftIDs) external {
        uint256 length = nftIDs.length;
        if(length == 0) revert Errors.EmptyArray();
        if(quests[questID].gauge == address(0)) revert Errors.InvalidQuestID();
        if(msg.sender != quests[questID].creator) revert Errors.CallerNotAllowed();
        if(length + questVoterList[questID].length > MAX_VOTERLIST_SIZE) revert Errors.MaxListSize();


        for(uint256 i = 0; i < length;){
            _addToVoterList(questID, nftIDs[i]);
            unchecked {
                ++i;
            }
        }

        emit VoterListUpdated(questID);
    }

    /**
    * @notice Removes a given address from a Quest's voter list
    * @param questID ID of the Quest
    * @param nftID ID of the veNFT
    */
    function removeFromVoterList(uint256 questID, uint256 nftID) external {
        if(quests[questID].gauge == address(0)) revert Errors.InvalidQuestID();
        if(msg.sender != quests[questID].creator) revert Errors.CallerNotAllowed();

        uint256[] memory _list = questVoterList[questID];
        uint256 length = _list.length;

        for(uint256 i; i < length;){
            if(_list[i] == nftID){
                if(i != length - 1){
                    questVoterList[questID][i] = _list[length - 1];
                }
                questVoterList[questID].pop();

                emit VoterListUpdated(questID);

                return;
            }

            unchecked {
                ++i;
            }
        }
    }
   
    /**
    * @notice Withdraw all undistributed rewards from Closed Quest Periods
    * @dev Withdraw all undistributed rewards from Closed Quest Periods
    * @param questID ID of the Quest
    * @param recipient Address to send the reward tokens to
    */
    function withdrawUnusedRewards(uint256 questID, address recipient) external nonReentrant isAlive isInitialized {
        if(questID >= nextID) revert Errors.InvalidQuestID();
        if(msg.sender != quests[questID].creator) revert Errors.CallerNotAllowed();
        if(recipient == address(0)) revert Errors.AddressZero();

        // Total amount available to withdraw
        uint256 withdrawAmount = questWithdrawableAmount[questID];
        questWithdrawableAmount[questID] = 0;

        // If there is a non null amount of token to withdraw, execute a transfer
        if(withdrawAmount != 0){
            address rewardToken = quests[questID].rewardToken;
            IERC20(rewardToken).safeTransfer(recipient, withdrawAmount);

            emit WithdrawUnusedRewards(questID, recipient, withdrawAmount);
        }
    }

    function multipleWithdrawUnusedRewards(uint256[] calldata questIDs, address recipient) external nonReentrant isAlive isInitialized {
        uint256 length = questIDs.length;
        if(length == 0) revert Errors.EmptyArray();
        if(recipient == address(0)) revert Errors.AddressZero();

        address lastToken;
        uint256 transferAmount;

        for(uint256 i; i < length;){
            if(questIDs[i] >= nextID) revert Errors.InvalidQuestID();
            if(msg.sender != quests[questIDs[i]].creator) revert Errors.CallerNotAllowed();

            // Total amount available to withdraw
            uint256 withdrawAmount = questWithdrawableAmount[questIDs[i]];
            questWithdrawableAmount[questIDs[i]] = 0;

            // If there is a non null amount of token to withdraw, execute a transfer
            if(withdrawAmount != 0){
                address rewardToken = quests[questIDs[i]].rewardToken;
                
                if(rewardToken != lastToken){
                    if(lastToken != address(0)){
                        IERC20(lastToken).safeTransfer(recipient, transferAmount);
                        transferAmount = 0;
                    }
                    lastToken = rewardToken;
                    transferAmount += withdrawAmount;
                } else {
                    transferAmount += withdrawAmount;
                }

                emit WithdrawUnusedRewards(questIDs[i], recipient, withdrawAmount);
            }

            unchecked{ ++i; }
        }

        if(lastToken != address(0) && transferAmount != 0){
            IERC20(lastToken).safeTransfer(recipient, transferAmount);
        }
    }
   
    /**
    * @notice Emergency withdraws all undistributed rewards from Closed Quest Periods & all rewards for Active Periods
    * @dev Emergency withdraws all undistributed rewards from Closed Quest Periods & all rewards for Active Periods
    * @param questID ID of the Quest
    * @param recipient Address to send the reward tokens to
    */
    function emergencyWithdraw(uint256 questID, address recipient) external nonReentrant {
        if(!isKilled) revert Errors.NotKilled();
        if(block.timestamp < killTs + KILL_DELAY) revert Errors.KillDelayNotExpired();

        if(questID >= nextID) revert Errors.InvalidQuestID();
        if(msg.sender != quests[questID].creator) revert Errors.CallerNotAllowed();
        if(recipient == address(0)) revert Errors.AddressZero();

        // Total amount to emergency withdraw
        uint256 withdrawAmount = questWithdrawableAmount[questID];
        questWithdrawableAmount[questID] = 0;

        uint48[] memory _questPeriods = questPeriods[questID];
        uint256 length = _questPeriods.length;
        Quest storage _questData = quests[questID];

        for(uint256 i; i < length;){
            // For ACTIVE periods
            if(periodStateByQuest[questID][_questPeriods[i]] == QuestDataTypes.PeriodState.ACTIVE){
                // For the active period, and the next ones, withdraw the total reward amount
                withdrawAmount += _questData.rewardAmountPerPeriod;
            }

            unchecked{ ++i; }
        }
        _questData.rewardAmountPerPeriod = 0;

        // If the total amount to emergency withdraw is non_null, execute a transfer
        if(withdrawAmount != 0){
            IERC20(quests[questID].rewardToken).safeTransfer(recipient, withdrawAmount);

            emit EmergencyWithdraw(questID, recipient, withdrawAmount);
        }

    }

    /**
    * @notice Get the fee ratio for a given Quest creator
    * @dev Returns the custom fee ratio for a Quest creator if set, otherwise returns the general fee ratio
    * @param questCreator address of the Quest creator
    * @return uint256 : fee ratio
    */
    function _getFeeRatio(address questCreator) internal view returns(uint256) {
        return customPlatformFeeRatio[questCreator] != 0 ? customPlatformFeeRatio[questCreator] : platformFeeRatio;
    }


    // Manager functions

    /**
    * @notice Gets the amount of rewards to be distributed for the period
    * @dev Gets the amount of rewards to be distributed for the
    * @param questRewardType Rewards type for the Quest
    * @param periodBias Bias of the gauge (reduced if nedded) for the given period
    * @param _questData Data for the Quest
    * @return uint256 : Amount to be distributed
    */
    function _getDistributionAmount(
        QuestDataTypes.QuestRewardsType questRewardType,
        uint256 periodBias,
        Quest memory _questData
    ) internal pure returns(uint256) {
        // Here, if the Gauge Bias is equal or greater than the objective, 
        // set all the period reward to be distributed.
        // If the bias is less, we take that bias, and calculate the amount of rewards based
        // on the rewardPerVote & the Gauge bias

        // If the votes received exceed the max objective of the Quest (for both types)
        // Distribute all the rewards for the period
        if(periodBias >= _questData.maxObjectiveVotes) return _questData.rewardAmountPerPeriod;

        if(questRewardType == QuestDataTypes.QuestRewardsType.FIXED) {
            return (periodBias * _questData.minRewardPerVote) / UNIT;
        } else { // For QuestDataTypes.QuestRewardsType.RANGE
                // If the bias is under the minimum objective, use max reward/vote
            if(periodBias <= _questData.minObjectiveVotes) return (periodBias * _questData.maxRewardPerVote) / UNIT;
            else return _questData.rewardAmountPerPeriod;
        }
    }

    /**
    * @notice Handles the Quest period undistributed rewards
    * @dev Handles the Quest period undistributed rewards based on the Quest Close type
    * @param questID ID of the Quest
    * @param currentPeriod Timestamp of the current period
    * @param questCloseType Close type for the Quest
    * @param undistributedAmount Amount of token not distributed for voter rewards
    */
    function _handleUndistributedRewards(
        uint256 questID,
        uint256 currentPeriod,
        QuestDataTypes.QuestCloseType questCloseType,
        uint256 undistributedAmount
    ) internal {
        if(questCloseType == QuestDataTypes.QuestCloseType.ROLLOVER) {
            // Since this type is only allowed for FIXED Rewards Quests
            // We simply recalculate the next period reward/vote based on the current Objective
            uint256 nextPeriod = currentPeriod + WEEK;
            // If not the last period
            if(nextPeriod > questPeriods[questID][questPeriods[questID].length - 1]) {
                // This the Quest last period, no period to rollover to
                questWithdrawableAmount[questID] += undistributedAmount;
                return;
            }
            Quest storage _questData = quests[questID];

            usedRewardPerPeriod[questID][currentPeriod] = _questData.rewardAmountPerPeriod;

            // Calculate the new period parameters by adding undistributed rewards to the base period reward amount
            // or reset to the original reward amount if the undistributed amount is 0
            // & update the next period parameters based on new calculated parameters
            uint256 newRewardPerPeriod = originalRewardPerPeriod[questID];

            if(undistributedAmount > 0) {
                newRewardPerPeriod += (undistributedAmount);
            }

            uint256 newMinRewardPerVote = (newRewardPerPeriod * UNIT) / _questData.maxObjectiveVotes;
            uint256 newMaxRewardPerVote = (newRewardPerPeriod * UNIT) / _questData.minObjectiveVotes;
            _questData.minRewardPerVote = newMinRewardPerVote;
            _questData.maxRewardPerVote = newMaxRewardPerVote;
            _questData.rewardAmountPerPeriod = newRewardPerPeriod;

            emit RewardsRollover(questID, newRewardPerPeriod, newMinRewardPerVote, newMaxRewardPerVote);
            
        } else { // For QuestDataTypes.QuestCloseType.NORMAL
            questWithdrawableAmount[questID] += undistributedAmount;
        }
    }

    /**
    * @notice Closes the Period, and all QuestPeriods for this period
    * @dev Closes all QuestPeriod for the given period, calculating rewards to distribute & send them to distributor
    * @param period Timestamp of the period
    */
    function _closeQuestPeriod(uint256 period, uint256 questID) internal returns(bool) {
        // We check that this period was not already closed
        if(periodStateByQuest[questID][period] != QuestDataTypes.PeriodState.ACTIVE) return false;

        Quest memory _quest = quests[questID];
        periodStateByQuest[questID][period] = QuestDataTypes.PeriodState.CLOSED;

        // Get the bias of the Gauge for the end of the period
        uint256 periodAdjustedBias = getReducedBias(
            period + WEEK,
            questID
        );

        uint256 undistributedAmount;

        if(periodAdjustedBias == 0) { 
            // Because we don't want to divide by 0 here since the bias is 0, we consider 0% completion
            // => no rewards to be distributed
            // We do not change _questPeriod.rewardAmountDistributed since the default value is already 0
            undistributedAmount = _quest.rewardAmountPerPeriod;
        }
        else{
            // Get the amount of rewards to be distributed
            uint256 distributionAmount = _getDistributionAmount(_quest.types.rewardsType, periodAdjustedBias, _quest);
            periodAmountDistributedByQuest[questID][period] = distributionAmount;

            // And the rest is set as withdrawable amount, that the Quest creator can retrieve
            undistributedAmount = _quest.rewardAmountPerPeriod - distributionAmount;

            // Send the rewards to be distributed to the Distrubutor
            address questDistributor = questDistributors[questID];
            if(!MultiMerkleDistributor(questDistributor).addQuestPeriod(questID, period, distributionAmount)) revert Errors.DisitributorFail();
            IERC20(_quest.rewardToken).safeTransfer(questDistributor, distributionAmount);
        }

        // Handle the undistributed rewards based on the Quest Close type
        _handleUndistributedRewards(questID, period, _quest.types.closeType, undistributedAmount);

        emit PeriodClosed(questID, period);

        return true;
    }
 
    /**
    * @notice Closes the Period, and all QuestPeriods for this period
    * @dev Closes all QuestPeriod for the given period, calculating rewards to distribute & send them to distributor
    * @param period Timestamp of the period
    */
    function closeQuestPeriod(uint256 period) external nonReentrant isAlive isInitialized onlyAllowed returns(uint256 closed, uint256 skipped) {
        period = (period / WEEK) * WEEK;
        if(period == 0) revert Errors.InvalidPeriod();
        if(period >= getCurrentPeriod()) revert Errors.PeriodStillActive();
        if(questsByPeriod[period].length == 0) revert Errors.EmptyPeriod();

        uint256[] memory questsForPeriod = questsByPeriod[period];

        // For each QuestPeriod
        uint256 length = questsForPeriod.length;
        for(uint256 i = 0; i < length;){
            bool result = _closeQuestPeriod(period, questsForPeriod[i]);

            if(result) closed++; 
            else skipped++;

            unchecked{ ++i; }
        }
    }

    /**
    * @notice Closes the given QuestPeriods for the Period
    * @dev Closes the given QuestPeriods for the Period, calculating rewards to distribute & send them to distributor
    * @param period Timestamp of the period
    * @param questIDs List of the Quest IDs to close
    */
    function closePartOfQuestPeriod(uint256 period, uint256[] calldata questIDs) external nonReentrant isAlive isInitialized onlyAllowed returns(uint256 closed, uint256 skipped) {
        period = (period / WEEK) * WEEK;
        uint256 questIDLength = questIDs.length;
        if(questIDLength == 0) revert Errors.EmptyArray();
        if(period == 0) revert Errors.InvalidPeriod();
        if(period >= getCurrentPeriod()) revert Errors.PeriodStillActive();
        if(questsByPeriod[period].length == 0) revert Errors.EmptyPeriod();

        // For each QuestPeriod for the given Quest IDs list
        for(uint256 i = 0; i < questIDLength;){
            bool result = _closeQuestPeriod(period, questIDs[i]);

            if(result) closed++; 
            else skipped++;

            unchecked{ ++i; }
        }
    }

    /**
    * @notice Sets a list of QuestPeriods as disitrbuted, and adds the MerkleRoot to the Distributor contract for each
    * @dev Loop and internal call to _addMerkleRoot()
    * @param questIDs List of Quest IDs
    * @param period Timestamp of the period
    * @param totalAmounts List of sums of all rewards for the Merkle Tree
    * @param merkleRoots List of MerkleRoots to add
    */
    function addMultipleMerkleRoot(
        uint256[] calldata questIDs,
        uint256 period,
        uint256[] calldata totalAmounts,
        bytes32[] calldata merkleRoots
    ) external nonReentrant isAlive isInitialized onlyAllowed {
        period = (period / WEEK) * WEEK;
        uint256 length = questIDs.length;

        if(length != merkleRoots.length) revert Errors.InequalArraySizes();
        if(length != totalAmounts.length) revert Errors.InequalArraySizes();

        for(uint256 i = 0; i < length;){
            if(questIDs[i] >= nextID) revert Errors.InvalidQuestID();
            if(merkleRoots[i] == 0) revert Errors.EmptyMerkleRoot();
            if(totalAmounts[i] == 0) revert Errors.NullAmount();

            // This also allows to check if the given period is correct => If not, the currentState is never set to CLOSED for the QuestPeriod
            if(periodStateByQuest[questIDs[i]][period] != QuestDataTypes.PeriodState.CLOSED) revert Errors.PeriodNotClosed();

            // Add the MerkleRoot to the Distributor & set the QuestPeriod as DISTRIBUTED
            if(!MultiMerkleDistributor(questDistributors[questIDs[i]]).updateQuestPeriod(questIDs[i], period, totalAmounts[i], merkleRoots[i])) revert Errors.DisitributorFail();

            periodStateByQuest[questIDs[i]][period] = QuestDataTypes.PeriodState.DISTRIBUTED;

            unchecked{ ++i; }
        }
    }
   
    /**
    * @notice Whitelists a list of reward tokens
    * @dev Whitelists a list of reward tokens
    * @param newTokens List of reward tokens addresses
    * @param minRewardPerVotes List of minimal threshold of reward per vote for the reward token
    */
    function whitelistMultipleTokens(address[] calldata newTokens, uint256[] calldata minRewardPerVotes) external onlyAllowed {
        uint256 length = newTokens.length;

        if(length == 0) revert Errors.EmptyArray();
        if(length != minRewardPerVotes.length) revert Errors.InequalArraySizes();

        for(uint256 i = 0; i < length;){
            if(newTokens[i] == address(0)) revert Errors.AddressZero();
            if(minRewardPerVotes[i] == 0) revert Errors.InvalidParameter();

            whitelistedTokens[newTokens[i]] = true;

            minRewardPerVotePerToken[newTokens[i]] = minRewardPerVotes[i];

            emit WhitelistToken(newTokens[i], minRewardPerVotes[i]);

            unchecked{ ++i; }
        }
    }
   
    /**
    * @notice Updates a reward token parameters
    * @dev Updates a reward token parameters
    * @param newToken Address of the reward token
    * @param newMinRewardPerVote New minimal threshold of reward per vote for the reward token
    */
    function updateRewardToken(address newToken, uint256 newMinRewardPerVote) external onlyAllowed {
        if(!whitelistedTokens[newToken]) revert Errors.TokenNotWhitelisted();
        if(newMinRewardPerVote == 0) revert Errors.InvalidParameter();

        minRewardPerVotePerToken[newToken] = newMinRewardPerVote;

        emit UpdateRewardToken(newToken, newMinRewardPerVote);
    }


    // Admin functions


    function _getPastDistributionAmountRollover(
        QuestDataTypes.QuestRewardsType questRewardType,
        uint256 periodBias,
        uint256 pastRewardPerPeriod,
        Quest memory _questData
    ) internal pure returns(uint256) {
        if(periodBias == 0) return 0;
        if(periodBias >= _questData.maxObjectiveVotes) return pastRewardPerPeriod;

        if(questRewardType == QuestDataTypes.QuestRewardsType.FIXED) {
            uint256 pastMinRewardPerVote = (pastRewardPerPeriod * UNIT) / _questData.maxObjectiveVotes;
            return (periodBias * pastMinRewardPerVote) / UNIT;
        } else { // For QuestDataTypes.QuestRewardsType.RANGE
            // If the bias is under the minimum objective, use max reward/vote
            uint256 pastMaxRewardPerVote = (pastRewardPerPeriod * UNIT) / _questData.minObjectiveVotes;
            if(periodBias <= _questData.minObjectiveVotes) return (periodBias * pastMaxRewardPerVote) / UNIT;
            else return pastRewardPerPeriod;
        }
    }

   
    /**
    * @notice Approves a new address as manager 
    * @dev Approves a new address as manager
    * @param period Timestamp fo the period to fix
    * @param questID ID of the Quest
    * @param correctReducedBias Currect bias to be used for the Quest period
    */
    function fixQuestPeriodBias(uint256 period, uint256 questID, uint256 correctReducedBias) external nonReentrant isAlive onlyOwner {
        period = (period / WEEK) * WEEK;
        if(questID >= nextID) revert Errors.InvalidQuestID();
        if(distributor == address(0)) revert Errors.NoDistributorSet();
        if(period == 0) revert Errors.InvalidPeriod();
        if(period > getCurrentPeriod()) revert Errors.InvalidPeriod();

        Quest storage _quest = quests[questID];

        // This also allows to check if the given period is correct => If not, the currentState is never set to CLOSED for the QuestPeriod
        if(periodStateByQuest[questID][period] != QuestDataTypes.PeriodState.CLOSED) revert Errors.PeriodNotClosed();

        uint256 previousRewardAmountDistributed = periodAmountDistributedByQuest[questID][period];
        uint256 previousWithdrawableAmount = _quest.rewardAmountPerPeriod - previousRewardAmountDistributed;

        address questDistributor = questDistributors[questID];

        if(correctReducedBias == 0 && _quest.types.closeType != QuestDataTypes.QuestCloseType.ROLLOVER) { 
            // Set rewardAmountDistributed back to 0, get all rewards token back to the Board
            periodAmountDistributedByQuest[questID][period] = 0;

            if(!MultiMerkleDistributor(questDistributor).fixQuestPeriod(questID, period, 0)) revert Errors.DisitributorFail();

            if(_quest.types.closeType == QuestDataTypes.QuestCloseType.NORMAL) {
                questWithdrawableAmount[questID] = questWithdrawableAmount[questID] + _quest.rewardAmountPerPeriod - previousWithdrawableAmount;
            } else {
                _handleUndistributedRewards(questID, period, _quest.types.closeType, previousRewardAmountDistributed);
            }
        }
        else{
            uint256 newToDistributeAmount = _getDistributionAmount(_quest.types.rewardsType, correctReducedBias, _quest);

            if(_quest.types.closeType == QuestDataTypes.QuestCloseType.ROLLOVER) {
                // Re-calculate the distribution amount for the period based on past data
                uint256 pastRewardPerPeriod = usedRewardPerPeriod[questID][period];
                newToDistributeAmount = _getPastDistributionAmountRollover(_quest.types.rewardsType, correctReducedBias, pastRewardPerPeriod, _quest);

                // We simply recalculate the next period reward/vote based on the current Objective
                uint256 nextPeriod = period + WEEK;
                uint256 lastPeriod = questPeriods[questID][questPeriods[questID].length - 1];
                // If not the last period
                if(nextPeriod > lastPeriod) {
                    // This the Quest last period, no period to rollover to
                    questWithdrawableAmount[questID] = questWithdrawableAmount[questID] + (pastRewardPerPeriod - newToDistributeAmount) - previousWithdrawableAmount;
                } else {
                    uint256 newRewardPerPeriod = newToDistributeAmount > previousRewardAmountDistributed ?
                        _quest.rewardAmountPerPeriod - ((newToDistributeAmount - previousRewardAmountDistributed)) :
                        _quest.rewardAmountPerPeriod + ((previousRewardAmountDistributed - newToDistributeAmount));

                    uint256 newMinRewardPerVote = (newRewardPerPeriod * UNIT) / _quest.maxObjectiveVotes;
                    uint256 newMaxRewardPerVote = (newRewardPerPeriod * UNIT) / _quest.minObjectiveVotes;
                    
                    _quest.minRewardPerVote = newMinRewardPerVote;
                    _quest.maxRewardPerVote = newMaxRewardPerVote;
                    _quest.rewardAmountPerPeriod = newRewardPerPeriod;

                    emit RewardsRollover(questID, newRewardPerPeriod, newMinRewardPerVote, newMaxRewardPerVote);
                }

                if(newToDistributeAmount > previousRewardAmountDistributed){
                    uint256 missingAmount = newToDistributeAmount - previousRewardAmountDistributed;
                    IERC20(_quest.rewardToken).safeTransfer(questDistributor, missingAmount);
                }
            } else { // For QuestDataTypes.QuestCloseType.NORMAL
                questWithdrawableAmount[questID] = questWithdrawableAmount[questID] + (_quest.rewardAmountPerPeriod - newToDistributeAmount) - previousWithdrawableAmount;

                if(newToDistributeAmount > previousRewardAmountDistributed){
                    uint256 missingAmount = newToDistributeAmount - previousRewardAmountDistributed;
                    IERC20(_quest.rewardToken).safeTransfer(questDistributor, missingAmount);
                }
            }

            // Fix the Period in the Distributor, and retrieve token in case too much was sent
            if(!MultiMerkleDistributor(questDistributor).fixQuestPeriod(questID, period, newToDistributeAmount)) revert Errors.DisitributorFail();

            periodAmountDistributedByQuest[questID][period] = newToDistributeAmount;
        }

        emit PeriodBiasFixed(period, questID, correctReducedBias);
    }
   
    /**
    * @notice Approves a new address as manager 
    * @dev Approves a new address as manager
    * @param newManager Address to add
    */
    function approveManager(address newManager) external onlyOwner {
        if(newManager == address(0)) revert Errors.AddressZero();
        approvedManagers[newManager] = true;

        emit ApprovedManager(newManager);
    }
   
    /**
    * @notice Removes an address from the managers
    * @dev Removes an address from the managers
    * @param manager Address to remove
    */
    function removeManager(address manager) external onlyOwner {
        if(manager == address(0)) revert Errors.AddressZero();
        approvedManagers[manager] = false;

        emit RemovedManager(manager);
    }
   
    /**
    * @notice Updates the Chest address
    * @dev Updates the Chest address
    * @param chest Address of the new Chest
    */
    function updateChest(address chest) external onlyOwner {
        if(chest == address(0)) revert Errors.AddressZero();
        address oldChest = questChest;
        questChest = chest;

        emit ChestUpdated(oldChest, chest);
    }
   
    /**
    * @notice Updates the Distributor address
    * @dev Updates the Distributor address
    * @param newDistributor Address of the new Distributor
    */
    function updateDistributor(address newDistributor) external onlyOwner {
        if(newDistributor == address(0)) revert Errors.AddressZero();
        address oldDistributor = distributor;
        distributor = newDistributor;

        emit DistributorUpdated(oldDistributor, distributor);
    }
   
    /**
    * @notice Updates the Platfrom fees BPS ratio
    * @dev Updates the Platfrom fees BPS ratio
    * @param newFee New fee ratio
    */
    function updatePlatformFee(uint256 newFee) external onlyOwner {
        if(newFee > 500) revert Errors.InvalidParameter();
        uint256 oldfee = platformFeeRatio;
        platformFeeRatio = newFee;

        emit PlatformFeeRatioUpdated(oldfee, newFee);
    }
   
    /**
    * @notice Updates the min objective value
    * @dev Updates the min objective value
    * @param newMinObjective New min objective
    */
    function updateMinObjective(uint256 newMinObjective) external onlyOwner {
        if(newMinObjective == 0) revert Errors.InvalidParameter();
        uint256 oldMinObjective = objectiveMinimalThreshold;
        objectiveMinimalThreshold = newMinObjective;

        emit MinObjectiveUpdated(oldMinObjective, newMinObjective);
    }
   
    /**
    * @notice Sets a custom fee ratio for a given address
    * @dev Sets a custom fee ratio for a given address
    * @param user User address
    * @param customFeeRatio Custom fee ratio
    */
    function setCustomFeeRatio(address user, uint256 customFeeRatio) external onlyOwner {
        if(customFeeRatio > platformFeeRatio) revert Errors.InvalidParameter();
        
        customPlatformFeeRatio[user] = customFeeRatio;

        emit SetCustomFeeRatio(user, customFeeRatio);
    }
   
    /**
    * @notice Recovers ERC2O tokens sent by mistake to the contract
    * @dev Recovers ERC2O tokens sent by mistake to the contract
    * @param token Address tof the EC2O token
    * @return bool: success
    */
    function recoverERC20(address token) external onlyOwner returns(bool) {
        if(whitelistedTokens[token]) revert Errors.CannotRecoverToken();

        uint256 amount = IERC20(token).balanceOf(address(this));
        if(amount == 0) revert Errors.NullAmount();
        IERC20(token).safeTransfer(owner(), amount);

        return true;
    }
   
    /**
    * @notice Kills the contract
    * @dev Kills the contract
    */
    function killBoard() external onlyOwner {
        if(isKilled) revert Errors.AlreadyKilled();
        isKilled = true;
        killTs = block.timestamp;

        emit Killed(killTs);
    }
   
    /**
    * @notice Unkills the contract
    * @dev Unkills the contract
    */
    function unkillBoard() external onlyOwner {
        if(!isKilled) revert Errors.NotKilled();
        if(block.timestamp >= killTs + KILL_DELAY) revert Errors.KillDelayExpired();
        isKilled = false;

        emit Unkilled(block.timestamp);
    }


    // Utils 

    function safe48(uint n) internal pure returns (uint48) {
        if(n > type(uint48).max) revert Errors.NumberExceed48Bits();
        return uint48(n);
    }

}

//SPDX-License-Identifier: BUSL-1.1

pragma solidity 0.8.20;

import "../libraries/QuestDataTypes.sol";

/** @title Interface fo Quest Board V2  */
/// @author Paladin
interface IQuestBoard {

    // Structs

    /** @notice Struct holding the parameters of the Quest common for all periods */
    struct Quest {
        // Address of the Quest creator (caller of createQuest() method)
        address creator;
        // Address of the ERC20 used for rewards
        address rewardToken;
        // Address of the target Gauge
        address gauge;
        // Total number of periods for the Quest
        uint48 duration;
        // Timestamp where the 1st QuestPeriod starts
        uint48 periodStart;
        // Total amount of rewards paid for this Quest
        // If changes were made to the parameters of this Quest, this will account
        // any added reward amounts
        uint256 totalRewardAmount;
        // Total reward amount that can be distributed for each period
        uint256 rewardAmountPerPeriod;
        // Min Amount of reward for each vote (for 1 veToken)
        uint256 minRewardPerVote;
        // Max Amount of reward for each vote (for 1 veToken)
        uint256 maxRewardPerVote;
        // Min Target Bias for the Gauge
        uint256 minObjectiveVotes;
        // Max Target Bias for the Gauge
        uint256 maxObjectiveVotes;
        // Quest Types
        QuestTypes types;
    }

    /** @notice Struct with all the Quest types */
    struct QuestTypes {
        QuestDataTypes.QuestVoteType voteType;
        QuestDataTypes.QuestRewardsType rewardsType;
        QuestDataTypes.QuestCloseType closeType;
    }

    /** @notice Struct for the local variables in _createQuest() method */
    struct CreateVars {
        address creator;
        uint256 rewardPerPeriod;
        uint256 minObjective;
        uint256 startPeriod;
        uint256 periodIterator;
        uint256 voterLength;
    }

    /** @notice Struct for the local variables in extendQuest() method */
    struct ExtendVars {
        uint256 lastPeriod;
        address gauge;
        address rewardToken;
        uint256 rewardPerPeriod;
        uint256 periodIterator;
        uint256 minObjective;
        uint256 maxObjective;
        uint256 minRewardPerVote;
        uint256 maxRewardPerVote;
    }

    /** @notice Struct for the local variables in updateQuestParameters() methods */
    struct UpdateVars {
        uint256 remainingDuration;
        uint256 currentPeriod;
        uint256 newRewardPerPeriod;
        uint256 newMaxObjective;
        uint256 newMinObjective;
        address creator;
    }

    // Events

    /** @notice Event emitted when the Board is Initialized */
    event Init(address distributor);

    /** @notice Event emitted when a new Quest is created */
    event NewQuest(
        uint256 indexed questID,
        address indexed creator,
        address indexed gauge,
        address rewardToken,
        uint48 duration,
        uint256 startPeriod
    );

    /** @notice Event emitted when the Quest duration is extended */
    event ExtendQuestDuration(uint256 indexed questID, uint256 addedDuration, uint256 addedRewardAmount);

    /** @notice Event emitted when a Quest parameters are updated */
    event UpdateQuestParameters(
        uint256 indexed questID,
        uint256 indexed updatePeriod,
        uint256 newMinRewardPerVote,
        uint256 newMaxRewardPerVote,
        uint256 addedPeriodRewardAmount
    );

    /** @notice Event emitted when Quest creator withdraw undistributed rewards */
    event WithdrawUnusedRewards(uint256 indexed questID, address recipient, uint256 amount);

    /** @notice Event emitted when a Quest Voter list is updated from it's original version */
    event VoterListUpdated(uint256 indexed questID);

    /** @notice Event emitted when a Period is Closed */
    event PeriodClosed(uint256 indexed questID, uint256 indexed period);
    /** @notice Event emitted when a Quest Period rools over the undistributed rewards */
    event RewardsRollover(uint256 indexed questID, uint256 newRewardPeriod, uint256 newMinRewardPerVote, uint256 newMaxRewardPerVote);

    /** @notice Event emitted when a Period Bias is fixed */
    event PeriodBiasFixed(uint256 indexed questID, uint256 indexed period, uint256 newBias);

    /** @notice Event emitted when a new reward token is whitelisted */
    event WhitelistToken(address indexed token, uint256 minRewardPerVote);
    /** @notice Event emitted when a reward token parameter is updated */
    event UpdateRewardToken(address indexed token, uint256 newMinRewardPerVote);
    /** @notice Event emitted when the contract is killed */
    event Killed(uint256 killTime);
    /** @notice Event emitted when the contract is unkilled */
    event Unkilled(uint256 unkillTime);
    /** @notice Event emitted when the Quest creator withdraw all unused funds (if the contract was killed) */
    event EmergencyWithdraw(uint256 indexed questID, address recipient, uint256 amount);

    /** @notice Event emitted when a new manager is approved */
    event ApprovedManager(address indexed manager);
    /** @notice Event emitted when a manager is removed */
    event RemovedManager(address indexed manager);
    /** @notice Event emitted when the Chest address is updated */
    event ChestUpdated(address oldChest, address newChest);
    /** @notice Event emitted when a custom fee ratio is set for a given address */
    event SetCustomFeeRatio(address indexed creator, uint256 customFeeRatio);
    /** @notice Event emitted when the Distributor address is updated */
    event DistributorUpdated(address oldDistributor, address newDistributor);
    /** @notice Event emitted when the fee ratio is updated */
    event PlatformFeeRatioUpdated(uint256 oldFeeRatio, uint256 newFeeRatio);
    /** @notice Event emitted when the minimum objective of votes is updated */
    event MinObjectiveUpdated(uint256 oldMinObjective, uint256 newMinObjective);
    
}

pragma solidity 0.8.20;
//SPDX-License-Identifier: MIT

interface IRingsVoter {
    function isGauge(address gauge) external view returns (bool);
    function isAlive(address gauge) external view returns (bool);
    function getTotalVotes() external view returns (uint256);
    function getGaugeVotes(address gauge) external view returns (uint256);
    function getNftVotesOnGauge(uint256 tokenId, address gauge) external view returns (uint256);
    function getTotalVotesAtPeriod(uint256 ts) external view returns (uint256);
    function getGaugeVotesAtPeriod(address gauge, uint256 ts) external view returns (uint256);
    function getNftVotesOnGaugeAtPeriod(uint256 tokenId, address gauge, uint256 ts) external view returns (uint256);

    function vote(uint256 tokenId, address[] calldata gaugeList, uint256[] calldata weights) external;
    function reset(uint256 tokenId) external;
    function recast(uint256 tokenId) external;
    function voteMultiple(uint256[] calldata tokenIds, address[] calldata gaugeList, uint256[] calldata weights) external;
    function resetMultiple(uint256[] calldata tokenIds) external;
    function recastMultiple(uint256[] calldata tokenIds) external;
    function depositBudget(uint256 amount) external;

    function addGauge(address gauge, string memory label) external returns (uint256 index);
}

pragma solidity ^0.8.16;
//SPDX-License-Identifier: MIT

library Errors {

    // Common Errors
    error AddressZero();
    error NullAmount();
    error CallerNotAllowed();
    error IncorrectRewardToken();
    error SameAddress();
    error InequalArraySizes();
    error EmptyArray();
    error EmptyParameters();
    error AlreadyInitialized();
    error InvalidParameter();
    error CannotRecoverToken();
    error ForbiddenCall();

    error CannotBeOwner();
    error CallerNotPendingOwner();

    error Killed();
    error AlreadyKilled();
    error NotKilled();
    error KillDelayExpired();
    error KillDelayNotExpired();


    // Merkle Errors
    error MerkleRootNotUpdated();
    error AlreadyClaimed();
    error InvalidProof();
    error EmptyMerkleRoot();
    error IncorrectRewardAmount();
    error MerkleRootFrozen();
    error NotFrozen();
    error AlreadyFrozen();


    // Quest Errors
    error CallerNotQuestBoard();
    error IncorrectQuestID();
    error IncorrectPeriod();
    error TokenNotWhitelisted();
    error QuestAlreadyListed();
    error QuestNotListed();
    error PeriodAlreadyUpdated();
    error PeriodNotClosed();
    error PeriodStillActive();
    error PeriodNotListed();
    error EmptyQuest();
    error EmptyPeriod();
    error ExpiredQuest();
    error QuestNotStarted();
    error QuestTypeForbidden();

    error NotInitialized();
    error NoDistributorSet();
    error DisitributorFail();
    error InvalidGauge();
    error InvalidQuestID();
    error InvalidPeriod();
    error ObjectiveTooLow();
    error NewObjectiveTooLow();
    error RewardPerVoteTooLow();
    error MinValueOverMaxValue();
    error IncorrectDuration();
    error IncorrectAddDuration();
    error IncorrectTotalRewardAmount();
    error IncorrectAddedRewardAmount();
    error IncorrectFeeAmount();
    error InvalidQuestType();
    error QuestTypesIncompatible();
    error CalletNotQuestCreator();
    error LowerRewardPerVote();
    error LowerObjective();
    error CreatorNotAllowed();
    error AlreadyListed();
    error NotListed();
    error MaxListSize();
    error BoardIsNotAllowedDistributor();


    // Proxy
    error InvalidChainID();
    error InvalidCaller();
    error PeriodBiasNotUpdated();
    error GaugeAlreadyAdded();
    error AmountExceedsBalance();
    error RecoverFailed();


    //Math
    error NumberExceed48Bits();

}

//SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.16;

/** @title Data Types fo Quest Board V2  */
/// @author Paladin
library QuestDataTypes {

    // Enums

    /** @notice State of each Period for each Quest */
    enum PeriodState { ZERO, ACTIVE, CLOSED, DISTRIBUTED }
    // All Periods are ACTIVE at creation since the voters from past periods are also accounted for the future period

    /** @notice Types of Vote logic for Quests */
    enum QuestVoteType { NORMAL, BLACKLIST, WHITELIST }
    // NORMAL: basic vote logic
    // BLACKLIST: remove the blacklisted voters bias from the gauge biases
    // WHITELIST: only sum up the whitelisted voters biases

    /** @notice Types of Rewards logic for Quests */
    enum QuestRewardsType { FIXED, RANGE }
    // FIXED: reward per vote is fixed
    // RANGE: reward per vote is a range between min and max, based on the Quest completion between min objective and max objective

    /** @notice Types of logic for undistributed rewards when closing Quest periods */
    enum QuestCloseType { NORMAL, ROLLOVER, DISTRIBUTE }
    // NORMAL: undistributed rewards are avaialble to be withdrawn by the creator
    // ROLLOVER: undistributed rewards are added to the next period, increasing the reward/vote parameter
    // DISTRIBUTE: undistributed rewards are sent to the gauge for direct distribution

}

//██████╗  █████╗ ██╗      █████╗ ██████╗ ██╗███╗   ██╗
//██╔══██╗██╔══██╗██║     ██╔══██╗██╔══██╗██║████╗  ██║
//██████╔╝███████║██║     ███████║██║  ██║██║██╔██╗ ██║
//██╔═══╝ ██╔══██║██║     ██╔══██║██║  ██║██║██║╚██╗██║
//██║     ██║  ██║███████╗██║  ██║██████╔╝██║██║ ╚████║
//╚═╝     ╚═╝  ╚═╝╚══════╝╚═╝  ╚═╝╚═════╝ ╚═╝╚═╝  ╚═══╝
 

//SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.20;

import "./oz/interfaces/IERC20.sol";
import "./oz/libraries/SafeERC20.sol";
import "./oz/utils/MerkleProof.sol";
import "./utils/Owner.sol";
import "./oz/utils/ReentrancyGuard.sol";
import "./libraries/Errors.sol";

/** @title Quest Multi Merkle Distributor  */
/// @author Paladin
/*
    Contract holds ERC20 rewards from Quests
    Can handle multiple MerkleRoots
*/

contract MultiMerkleDistributor is Owner, ReentrancyGuard {
    using SafeERC20 for IERC20;

    /** @notice Seconds in a Week */
    uint256 private constant WEEK = 604800;

    /** @notice Mapping listing the reward token associated to each Quest ID */
    // QuestID => reward token
    mapping(uint256 => address) public questRewardToken;

    /** @notice Mapping of tokens this contract is or was distributing */
    // token address => boolean
    mapping(address => bool) public rewardTokens;

    // Periods: timestamp => start of a week, used as a voting period 
    // in the Curve GaugeController though the timestamp / WEEK *  WEEK logic.
    // Handled through the QuestManager contract.
    // Those can be fetched through this contract when they are closed, or through the QuestManager contract.

    /** @notice List of Closed QuestPeriods by Quest ID */
    // QuestID => array of periods
    mapping(uint256 => uint256[]) public questClosedPeriods;

    /** @notice Merkle Root for each period of a Quest (indexed by Quest ID) */
    // QuestID => period => merkleRoot
    mapping(uint256 => mapping(uint256 => bytes32)) public questMerkleRootPerPeriod;

    /** @notice Amount of rewards for each period of a Quest (indexed by Quest ID) */
    // QuestID => period => totalRewardsAmount
    mapping(uint256 => mapping(uint256 => uint256)) public questRewardsPerPeriod;

    /** @notice BitMap of claims for each period of a Quest */
    // QuestID => period => claimedBitMap
    // This is a packed array of booleans.
    mapping(uint256 => mapping(uint256 => mapping(uint256 => uint256))) private questPeriodClaimedBitMap;

    /** @notice Address of the QuestBoard contract */
    address public immutable questBoard;


    // Events

    /** @notice Event emitted when a user Claims */
    event Claimed(
        uint256 indexed questID,
        uint256 indexed period,
        uint256 index,
        uint256 amount,
        address rewardToken,
        address indexed account
    );
    /** @notice Event emitted when a New Quest is added */
    event NewQuest(uint256 indexed questID, address rewardToken);
    /** @notice Event emitted when a Period of a Quest is updated (when the Merkle Root is added) */
    event QuestPeriodUpdated(uint256 indexed questID, uint256 indexed period, bytes32 merkleRoot);


    // Modifier

    /** @notice Check the caller is either the admin or the QuestBoard contract */
    modifier onlyAllowed(){
        if(msg.sender != questBoard && msg.sender != owner()) revert Errors.CallerNotAllowed();
        _;
    }


    // Constructor

    constructor(address _questBoard){
        if(_questBoard == address(0)) revert Errors.AddressZero();

        questBoard = _questBoard;
    }

    // Functions
   
    /**
    * @notice Checks if the rewards were claimed for a user on a given period
    * @dev Checks if the rewards were claimed for a user (based on the index) on a given period
    * @param questID ID of the Quest
    * @param period Amount of underlying to borrow
    * @param index Index of the claim
    * @return bool : true if already claimed
    */
    function isClaimed(uint256 questID, uint256 period, uint256 index) public view returns (bool) {
        uint256 claimedWordIndex = index >> 8;
        uint256 claimedBitIndex = index & 0xff;
        uint256 claimedWord = questPeriodClaimedBitMap[questID][period][claimedWordIndex];
        uint256 mask = (1 << claimedBitIndex);
        return claimedWord & mask != 0;
    }
   
    /**
    * @dev Sets the rewards as claimed for the index on the given period
    * @param questID ID of the Quest
    * @param period Timestamp of the period
    * @param index Index of the claim
    */
    function _setClaimed(uint256 questID, uint256 period, uint256 index) private {
        uint256 claimedWordIndex = index >> 8;
        uint256 claimedBitIndex = index & 0xff;
        questPeriodClaimedBitMap[questID][period][claimedWordIndex] |= (1 << claimedBitIndex);
    }

    //Basic Claim   
    /**
    * @notice Claims the reward for a user for a given period of a Quest
    * @dev Claims the reward for a user for a given period of a Quest if the correct proof was given
    * @param questID ID of the Quest
    * @param period Timestamp of the period
    * @param index Index in the Merkle Tree
    * @param account Address of the user claiming the rewards
    * @param amount Amount of rewards to claim
    * @param merkleProof Proof to claim the rewards
    */
    function claim(uint256 questID, uint256 period, uint256 index, address account, uint256 amount, bytes32[] calldata merkleProof) public nonReentrant {
        if(account == address(0)) revert Errors.AddressZero();
        if(questMerkleRootPerPeriod[questID][period] == 0) revert Errors.MerkleRootNotUpdated();
        if(isClaimed(questID, period, index)) revert Errors.AlreadyClaimed();

        // Check that the given parameters match the given Proof
        bytes32 node = keccak256(abi.encodePacked(questID, period, index, account, amount));
        if(!MerkleProof.verify(merkleProof, questMerkleRootPerPeriod[questID][period], node)) revert Errors.InvalidProof();

        // Set the rewards as claimed for that period
        // And transfer the rewards to the user
        address rewardToken = questRewardToken[questID];
        _setClaimed(questID, period, index);
        questRewardsPerPeriod[questID][period] -= amount;
        IERC20(rewardToken).safeTransfer(account, amount);

        emit Claimed(questID, period, index, amount, rewardToken, account);
    }


    //Struct ClaimParams
    struct ClaimParams {
        uint256 questID;
        uint256 period;
        uint256 index;
        uint256 amount;
        bytes32[] merkleProof;
    }


    //Multi Claim   
    /**
    * @notice Claims multiple rewards for a given list
    * @dev Calls the claim() method for each entry in the claims array
    * @param account Address of the user claiming the rewards
    * @param claims List of ClaimParams struct data to claim
    */
    function multiClaim(address account, ClaimParams[] calldata claims) external {
        uint256 length = claims.length;
        
        if(length == 0) revert Errors.EmptyParameters();

        for(uint256 i; i < length;){
            claim(claims[i].questID, claims[i].period, claims[i].index, account, claims[i].amount, claims[i].merkleProof);

            unchecked{ ++i; }
        }
    }


    //FullQuest Claim (form of Multi Claim but for only one Quest => only one ERC20 transfer)
    //Only works for the given periods (in ClaimParams) for the Quest. Any omitted period will be skipped   
    /**
    * @notice Claims the reward for all the given periods of a Quest, and transfer all the rewards at once
    * @dev Sums up all the rewards for given periods of a Quest, and executes only one transfer
    * @param account Address of the user claiming the rewards
    * @param questID ID of the Quest
    * @param claims List of ClaimParams struct data to claim
    */
    function claimQuest(address account, uint256 questID, ClaimParams[] calldata claims) external nonReentrant {
        if(account == address(0)) revert Errors.AddressZero();
        uint256 length = claims.length;

        if(length == 0) revert Errors.EmptyParameters();

        // Total amount claimable, to transfer at once
        uint256 totalClaimAmount;
        address rewardToken = questRewardToken[questID];

        for(uint256 i; i < length;){
            if(claims[i].questID != questID) revert Errors.IncorrectQuestID();
            if(questMerkleRootPerPeriod[questID][claims[i].period] == 0) revert Errors.MerkleRootNotUpdated();
            if(isClaimed(questID, claims[i].period, claims[i].index)) revert Errors.AlreadyClaimed();

            // For each period given, if the proof matches the given parameters, 
            // set as claimed and add to the to total to transfer
            bytes32 node = keccak256(abi.encodePacked(questID, claims[i].period, claims[i].index, account, claims[i].amount));
            if(!MerkleProof.verify(claims[i].merkleProof, questMerkleRootPerPeriod[questID][claims[i].period], node)) revert Errors.InvalidProof();

            _setClaimed(questID, claims[i].period, claims[i].index);
            questRewardsPerPeriod[questID][claims[i].period] -= claims[i].amount;
            totalClaimAmount += claims[i].amount;

            emit Claimed(questID, claims[i].period, claims[i].index, claims[i].amount, rewardToken, account);

            unchecked{ ++i; }
        }

        // Transfer the total claimed amount
        IERC20(rewardToken).safeTransfer(account, totalClaimAmount);
    }

   
    /**
    * @notice Returns all current Closed periods for the given Quest ID
    * @dev Returns all current Closed periods for the given Quest ID
    * @param questID ID of the Quest
    * @return uint256[] : List of closed periods
    */
    function getClosedPeriodsByQuests(uint256 questID) external view returns (uint256[] memory) {
        return questClosedPeriods[questID];
    }



    // Manager functions
   
    /**
    * @notice Adds a new Quest to the listing
    * @dev Adds a new Quest ID and the associated reward token
    * @param questID ID of the Quest
    * @param token Address of the ERC20 reward token
    * @return bool : success
    */
    function addQuest(uint256 questID, address token) external returns(bool) {
        if(msg.sender != questBoard) revert Errors.CallerNotAllowed();
        if(questRewardToken[questID] != address(0)) revert Errors.QuestAlreadyListed();
        if(token == address(0)) revert Errors.TokenNotWhitelisted();

        // Add a new Quest using the QuestID, and list the reward token for that Quest
        questRewardToken[questID] = token;

        if(!rewardTokens[token]) rewardTokens[token] = true;

        emit NewQuest(questID, token);

        return true;
    }

    /**
    * @notice Adds a new period & the rewards of this period for a Quest
    * @dev Adds a new period & the rewards of this period for a Quest
    * @param questID ID of the Quest
    * @param period Timestamp of the period
    * @param totalRewardAmount Total amount of rewards to distribute for the period
    * @return bool : success
    */
    function addQuestPeriod(uint256 questID, uint256 period, uint256 totalRewardAmount) external returns(bool) {
        period = (period / WEEK) * WEEK;
        if(msg.sender != questBoard) revert Errors.CallerNotAllowed();
        if(questRewardToken[questID] == address(0)) revert Errors.QuestNotListed();
        if(questRewardsPerPeriod[questID][period] != 0) revert Errors.PeriodAlreadyUpdated();
        if(period == 0) revert Errors.IncorrectPeriod();
        if(totalRewardAmount == 0) revert Errors.NullAmount();

        questRewardsPerPeriod[questID][period] = totalRewardAmount;

        return true;
    }


    function fixQuestPeriod(uint256 questID, uint256 period, uint256 newTotalRewardAmount) external returns(bool) {
        if(msg.sender != questBoard) revert Errors.CallerNotAllowed();
        period = (period / WEEK) * WEEK;
        if(questRewardToken[questID] == address(0)) revert Errors.QuestNotListed();
        if(period == 0) revert Errors.IncorrectPeriod();
        if(questRewardsPerPeriod[questID][period] == 0) revert Errors.PeriodNotListed();

        uint256 previousTotalRewardAmount = questRewardsPerPeriod[questID][period];

        questRewardsPerPeriod[questID][period] = newTotalRewardAmount;

        if(previousTotalRewardAmount > newTotalRewardAmount){
            // Send back the extra amount of reward token that was incorrectly sent
            // In the case of missing reward token, the Board will send them to this contract

            uint256 extraAmount = previousTotalRewardAmount - newTotalRewardAmount;
            IERC20(questRewardToken[questID]).safeTransfer(questBoard, extraAmount);
        }

        return true;
    }
   
    /**
    * @notice Updates the period of a Quest by adding the Merkle Root
    * @dev Add the Merkle Root for the eriod of the given Quest
    * @param questID ID of the Quest
    * @param period timestamp of the period
    * @param totalAmount sum of all rewards for the Merkle Tree
    * @param merkleRoot MerkleRoot to add
    * @return bool: success
    */
    function updateQuestPeriod(uint256 questID, uint256 period, uint256 totalAmount, bytes32 merkleRoot) external onlyAllowed returns(bool) {
        period = (period / WEEK) * WEEK;
        if(questRewardToken[questID] == address(0)) revert Errors.QuestNotListed();
        if(period == 0) revert Errors.IncorrectPeriod();
        if(questRewardsPerPeriod[questID][period] == 0) revert Errors.PeriodNotListed();
        if(questMerkleRootPerPeriod[questID][period] != 0) revert Errors.PeriodAlreadyUpdated();
        if(merkleRoot == 0) revert Errors.EmptyMerkleRoot();

        // Add a new Closed Period for the Quest
        questClosedPeriods[questID].push(period);

        if(totalAmount != questRewardsPerPeriod[questID][period]) revert Errors.IncorrectRewardAmount();

        // Add the new MerkleRoot for that Closed Period
        questMerkleRootPerPeriod[questID][period] = merkleRoot;

        emit QuestPeriodUpdated(questID, period, merkleRoot);

        return true;
    }


    //  Admin functions
   
    /**
    * @notice Recovers ERC2O tokens sent by mistake to the contract
    * @dev Recovers ERC2O tokens sent by mistake to the contract
    * @param token Address tof the EC2O token
    * @return bool: success
    */
    function recoverERC20(address token) external onlyOwner nonReentrant returns(bool) {
        if(rewardTokens[token]) revert Errors.CannotRecoverToken();
        uint256 amount = IERC20(token).balanceOf(address(this));
        if(amount == 0) revert Errors.NullAmount();
        IERC20(token).safeTransfer(owner(), amount);

        return true;
    }

    // 
    /**
    * @notice Allows to update the MerkleRoot for a given period of a Quest if the current Root is incorrect
    * @dev Updates the MerkleRoot for the period of the Quest
    * @param questID ID of the Quest
    * @param period Timestamp of the period
    * @param merkleRoot New MerkleRoot to add
    * @return bool : success
    */
    function emergencyUpdateQuestPeriod(uint256 questID, uint256 period, uint256 addedRewardAmount, bytes32 merkleRoot) external onlyOwner returns(bool) {
        // In case the given MerkleRoot was incorrect:
        // Process:
        // 1 - block claims for the Quest period by using this method to set an incorrect MerkleRoot, where no proof matches the root
        // 2 - prepare a new Merkle Tree, taking in account user previous claims on that period, and missing/overpaid rewards
        //      a - for all new claims to be added, set them after the last index of the previous Merkle Tree
        //      b - for users that did not claim, keep the same index, and adjust the amount to claim if needed
        //      c - for indexes that were claimed, place an empty node in the Merkle Tree (with an amount at 0 & the address 0xdead as the account)
        // 3 - update the Quest period with the correct MerkleRoot
        // (no need to change the Bitmap, as the new MerkleTree will account for the indexes already claimed)

        period = (period / WEEK) * WEEK;
        if(questRewardToken[questID] == address(0)) revert Errors.QuestNotListed();
        if(period == 0) revert Errors.IncorrectPeriod();
        if(questMerkleRootPerPeriod[questID][period] == 0) revert Errors.PeriodNotClosed();
        if(merkleRoot == 0) revert Errors.EmptyMerkleRoot();

        questMerkleRootPerPeriod[questID][period] = merkleRoot;

        questRewardsPerPeriod[questID][period] += addedRewardAmount;

        emit QuestPeriodUpdated(questID, period, merkleRoot);

        return true;
    }

}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Permit.sol)

pragma solidity ^0.8.0;

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (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 v4.8.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

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

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

    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(IERC20 token, address spender, uint256 value) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            uint256 newAllowance = oldAllowance - value;
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
        }
    }

    function safePermit(
        IERC20Permit token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        if (returndata.length > 0) {
            // Return data is optional
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (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/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

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

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return 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 v4.8.0) (utils/cryptography/MerkleProof.sol)

pragma solidity ^0.8.0;

/**
 * @dev These functions deal with verification of Merkle Tree proofs.
 *
 * The tree and the proofs can be generated using our
 * https://github.com/OpenZeppelin/merkle-tree[JavaScript library].
 * You will find a quickstart guide in the readme.
 *
 * WARNING: You should avoid using leaf values that are 64 bytes long prior to
 * hashing, or use a hash function other than keccak256 for hashing leaves.
 * This is because the concatenation of a sorted pair of internal nodes in
 * the merkle tree could be reinterpreted as a leaf value.
 * OpenZeppelin's JavaScript library generates merkle trees that are safe
 * against this attack out of the box.
 */
library MerkleProof {
    /**
     * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
     * defined by `root`. For this, a `proof` must be provided, containing
     * sibling hashes on the branch from the leaf to the root of the tree. Each
     * pair of leaves and each pair of pre-images are assumed to be sorted.
     */
    function verify(bytes32[] memory proof, bytes32 root, bytes32 leaf) internal pure returns (bool) {
        return processProof(proof, leaf) == root;
    }

    /**
     * @dev Calldata version of {verify}
     *
     * _Available since v4.7._
     */
    function verifyCalldata(bytes32[] calldata proof, bytes32 root, bytes32 leaf) internal pure returns (bool) {
        return processProofCalldata(proof, leaf) == root;
    }

    /**
     * @dev Returns the rebuilt hash obtained by traversing a Merkle tree up
     * from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt
     * hash matches the root of the tree. When processing the proof, the pairs
     * of leafs & pre-images are assumed to be sorted.
     *
     * _Available since v4.4._
     */
    function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) {
        bytes32 computedHash = leaf;
        for (uint256 i = 0; i < proof.length; i++) {
            computedHash = _hashPair(computedHash, proof[i]);
        }
        return computedHash;
    }

    /**
     * @dev Calldata version of {processProof}
     *
     * _Available since v4.7._
     */
    function processProofCalldata(bytes32[] calldata proof, bytes32 leaf) internal pure returns (bytes32) {
        bytes32 computedHash = leaf;
        for (uint256 i = 0; i < proof.length; i++) {
            computedHash = _hashPair(computedHash, proof[i]);
        }
        return computedHash;
    }

    /**
     * @dev Returns true if the `leaves` can be simultaneously proven to be a part of a merkle tree defined by
     * `root`, according to `proof` and `proofFlags` as described in {processMultiProof}.
     *
     * CAUTION: Not all merkle trees admit multiproofs. See {processMultiProof} for details.
     *
     * _Available since v4.7._
     */
    function multiProofVerify(
        bytes32[] memory proof,
        bool[] memory proofFlags,
        bytes32 root,
        bytes32[] memory leaves
    ) internal pure returns (bool) {
        return processMultiProof(proof, proofFlags, leaves) == root;
    }

    /**
     * @dev Calldata version of {multiProofVerify}
     *
     * CAUTION: Not all merkle trees admit multiproofs. See {processMultiProof} for details.
     *
     * _Available since v4.7._
     */
    function multiProofVerifyCalldata(
        bytes32[] calldata proof,
        bool[] calldata proofFlags,
        bytes32 root,
        bytes32[] memory leaves
    ) internal pure returns (bool) {
        return processMultiProofCalldata(proof, proofFlags, leaves) == root;
    }

    /**
     * @dev Returns the root of a tree reconstructed from `leaves` and sibling nodes in `proof`. The reconstruction
     * proceeds by incrementally reconstructing all inner nodes by combining a leaf/inner node with either another
     * leaf/inner node or a proof sibling node, depending on whether each `proofFlags` item is true or false
     * respectively.
     *
     * CAUTION: Not all merkle trees admit multiproofs. To use multiproofs, it is sufficient to ensure that: 1) the tree
     * is complete (but not necessarily perfect), 2) the leaves to be proven are in the opposite order they are in the
     * tree (i.e., as seen from right to left starting at the deepest layer and continuing at the next layer).
     *
     * _Available since v4.7._
     */
    function processMultiProof(
        bytes32[] memory proof,
        bool[] memory proofFlags,
        bytes32[] memory leaves
    ) internal pure returns (bytes32 merkleRoot) {
        // This function rebuilds the root hash by traversing the tree up from the leaves. The root is rebuilt by
        // consuming and producing values on a queue. The queue starts with the `leaves` array, then goes onto the
        // `hashes` array. At the end of the process, the last hash in the `hashes` array should contain the root of
        // the merkle tree.
        uint256 leavesLen = leaves.length;
        uint256 totalHashes = proofFlags.length;

        // Check proof validity.
        require(leavesLen + proof.length - 1 == totalHashes, "MerkleProof: invalid multiproof");

        // The xxxPos values are "pointers" to the next value to consume in each array. All accesses are done using
        // `xxx[xxxPos++]`, which return the current value and increment the pointer, thus mimicking a queue's "pop".
        bytes32[] memory hashes = new bytes32[](totalHashes);
        uint256 leafPos = 0;
        uint256 hashPos = 0;
        uint256 proofPos = 0;
        // At each step, we compute the next hash using two values:
        // - a value from the "main queue". If not all leaves have been consumed, we get the next leaf, otherwise we
        //   get the next hash.
        // - depending on the flag, either another value from the "main queue" (merging branches) or an element from the
        //   `proof` array.
        for (uint256 i = 0; i < totalHashes; i++) {
            bytes32 a = leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++];
            bytes32 b = proofFlags[i]
                ? (leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++])
                : proof[proofPos++];
            hashes[i] = _hashPair(a, b);
        }

        if (totalHashes > 0) {
            unchecked {
                return hashes[totalHashes - 1];
            }
        } else if (leavesLen > 0) {
            return leaves[0];
        } else {
            return proof[0];
        }
    }

    /**
     * @dev Calldata version of {processMultiProof}.
     *
     * CAUTION: Not all merkle trees admit multiproofs. See {processMultiProof} for details.
     *
     * _Available since v4.7._
     */
    function processMultiProofCalldata(
        bytes32[] calldata proof,
        bool[] calldata proofFlags,
        bytes32[] memory leaves
    ) internal pure returns (bytes32 merkleRoot) {
        // This function rebuilds the root hash by traversing the tree up from the leaves. The root is rebuilt by
        // consuming and producing values on a queue. The queue starts with the `leaves` array, then goes onto the
        // `hashes` array. At the end of the process, the last hash in the `hashes` array should contain the root of
        // the merkle tree.
        uint256 leavesLen = leaves.length;
        uint256 totalHashes = proofFlags.length;

        // Check proof validity.
        require(leavesLen + proof.length - 1 == totalHashes, "MerkleProof: invalid multiproof");

        // The xxxPos values are "pointers" to the next value to consume in each array. All accesses are done using
        // `xxx[xxxPos++]`, which return the current value and increment the pointer, thus mimicking a queue's "pop".
        bytes32[] memory hashes = new bytes32[](totalHashes);
        uint256 leafPos = 0;
        uint256 hashPos = 0;
        uint256 proofPos = 0;
        // At each step, we compute the next hash using two values:
        // - a value from the "main queue". If not all leaves have been consumed, we get the next leaf, otherwise we
        //   get the next hash.
        // - depending on the flag, either another value from the "main queue" (merging branches) or an element from the
        //   `proof` array.
        for (uint256 i = 0; i < totalHashes; i++) {
            bytes32 a = leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++];
            bytes32 b = proofFlags[i]
                ? (leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++])
                : proof[proofPos++];
            hashes[i] = _hashPair(a, b);
        }

        if (totalHashes > 0) {
            unchecked {
                return hashes[totalHashes - 1];
            }
        } else if (leavesLen > 0) {
            return leaves[0];
        } else {
            return proof[0];
        }
    }

    function _hashPair(bytes32 a, bytes32 b) private pure returns (bytes32) {
        return a < b ? _efficientHash(a, b) : _efficientHash(b, a);
    }

    function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x00, a)
            mstore(0x20, b)
            value := keccak256(0x00, 0x40)
        }
    }
}

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

pragma solidity ^0.8.0;

import "./Context.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 Ownable is Context {
    address private _owner;

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

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

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

/**
 * @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 ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

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

    uint256 private _status;

    constructor() {
        _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;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.20;

import "../oz/utils/Ownable.sol";
import "../libraries/Errors.sol";

/** @title 2-step Ownership  */
/// @author Paladin
/*
    Extends OZ Ownable contract to add 2-step ownership transfer
*/

contract Owner is Ownable {

    address public pendingOwner;

    event NewPendingOwner(address indexed previousPendingOwner, address indexed newPendingOwner);

    function transferOwnership(address newOwner) public override virtual onlyOwner {
        if(newOwner == address(0)) revert Errors.AddressZero();
        if(newOwner == owner()) revert Errors.CannotBeOwner();
        address oldPendingOwner = pendingOwner;

        pendingOwner = newOwner;

        emit NewPendingOwner(oldPendingOwner, newOwner);
    }

    function acceptOwnership() public virtual {
        if(msg.sender != pendingOwner) revert Errors.CallerNotPendingOwner();
        address newOwner = pendingOwner;
        _transferOwnership(pendingOwner);
        pendingOwner = address(0);

        emit NewPendingOwner(newOwner, address(0));
    }

}

{
  "optimizer": {
    "enabled": true,
    "runs": 9999
  },
  "viaIR": true,
  "evmVersion": "paris",
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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nalType":"uint256","name":"period","type":"uint256"}],"name":"closeQuestPeriod","outputs":[{"internalType":"uint256","name":"closed","type":"uint256"},{"internalType":"uint256","name":"skipped","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"gauge","type":"address"},{"internalType":"address","name":"rewardToken","type":"address"},{"internalType":"bool","name":"startNextPeriod","type":"bool"},{"internalType":"uint48","name":"duration","type":"uint48"},{"internalType":"uint256","name":"rewardPerVote","type":"uint256"},{"internalType":"uint256","name":"totalRewardAmount","type":"uint256"},{"internalType":"uint256","name":"feeAmount","type":"uint256"},{"internalType":"enum QuestDataTypes.QuestVoteType","name":"voteType","type":"uint8"},{"internalType":"enum QuestDataTypes.QuestCloseType","name":"closeType","type":"uint8"},{"internalType":"uint256[]","name":"voterList","type":"uint256[]"}],"name":"createFixedQuest","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"gauge","type":"address"},{"internalType":"address","name":"rewardToken","type":"address"},{"internalType":"bool","name":"startNextPeriod","type":"bool"},{"internalType":"uint48","name":"duration","type":"uint48"},{"internalType":"uint256","name":"minRewardPerVote","type":"uint256"},{"internalType":"uint256","name":"maxRewardPerVote","type":"uint256"},{"internalType":"uint256","name":"totalRewardAmount","type":"uint256"},{"internalType":"uint256","name":"feeAmount","type":"uint256"},{"internalType":"enum QuestDataTypes.QuestVoteType","name":"voteType","type":"uint8"},{"internalType":"enum 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000000000000000000000000f365c45b6913be7ab74c970d9227b9d0dff44afb000000000000000000000000e2a7de3c3190afd79c49c8e8f2fa30ca78b97dfd0000000000000000000000000000000000000000000000000000000000000006

-----Decoded View---------------
Arg [0] : _voter (address): 0xF365C45B6913BE7Ab74C970D9227B9D0dfF44aFb
Arg [1] : _chest (address): 0xE2a7De3C3190AFd79C49C8E8f2Fa30Ca78B97DFd
Arg [2] : _veNFTDecimals (uint256): 6

-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 000000000000000000000000f365c45b6913be7ab74c970d9227b9d0dff44afb
Arg [1] : 000000000000000000000000e2a7de3c3190afd79c49c8e8f2fa30ca78b97dfd
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000006