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// SPDX-License-Identifier: GPL-3.0

/// @title The client incentives rewards logic

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pragma solidity ^0.8.19;

import { INounsDAOLogic } from '../interfaces/INounsDAOLogic.sol';
import { INounsAuctionHouseV2 } from '../interfaces/INounsAuctionHouseV2.sol';
import { NounsDAOTypes } from '../governance/NounsDAOInterfaces.sol';
import { IERC20 } from '@openzeppelin/contracts/token/ERC20/IERC20.sol';
import { UUPSUpgradeable } from '@openzeppelin/contracts-upgradeable/proxy/utils/UUPSUpgradeable.sol';
import { SafeERC20 } from '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol';
import { PausableUpgradeable } from '@openzeppelin/contracts-upgradeable/security/PausableUpgradeable.sol';
import { ClientRewardsMemoryMapping } from '../libs/ClientRewardsMemoryMapping.sol';
import { GasRefund } from '../libs/GasRefund.sol';
import { INounsClientTokenDescriptor } from './INounsClientTokenDescriptor.sol';
import { INounsClientTokenTypes } from './INounsClientTokenTypes.sol';
import { OwnableUpgradeable } from '@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol';
import { ERC721Upgradeable } from '@openzeppelin/contracts-upgradeable/token/ERC721/ERC721Upgradeable.sol';
import { SafeCast } from '@openzeppelin/contracts/utils/math/SafeCast.sol';

contract Rewards is
    UUPSUpgradeable,
    PausableUpgradeable,
    OwnableUpgradeable,
    ERC721Upgradeable,
    INounsClientTokenTypes
{
    using SafeERC20 for IERC20;
    using ClientRewardsMemoryMapping for ClientRewardsMemoryMapping.Mapping;

    error RewardsDisabled();
    error OnlyOwnerOrAdmin();
    error OnlyNFTOwner();
    error LastNounIdMustBeSettled();
    error LastNounIdMustBeHigher();

    /**
     * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
     *   EVENTS
     * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
     */

    event ClientRegistered(uint32 indexed clientId, string name, string description);
    event ClientUpdated(uint32 indexed clientId, string name, string description);
    event ClientRewarded(uint32 indexed clientId, uint256 amount);
    event ClientBalanceWithdrawal(uint32 indexed clientId, uint256 amount, address to);
    event AuctionRewardsUpdated(uint256 firstAuctionId, uint256 lastAuctionId);
    event ProposalRewardsUpdated(
        uint32 firstProposalId,
        uint32 lastProposalId,
        uint256 firstAuctionIdForRevenue,
        uint256 lastAuctionIdForRevenue,
        uint256 auctionRevenue,
        uint256 rewardPerProposal,
        uint256 rewardPerVote
    );
    event ClientApprovalSet(uint32 indexed clientId, bool approved);
    event AuctionRewardsEnabled(uint32 nextAuctionIdToReward);
    event AuctionRewardsDisabled();
    event ProposalRewardsEnabled(uint32 nextProposalIdToReward, uint32 nextProposalRewardFirstAuctionId);
    event ProposalRewardsDisabled();

    /**
     * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
     *   IMMUTABLES
     * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
     */

    /// @notice Nouns DAO proxy contract
    INounsDAOLogic public immutable nounsDAO;

    /// @notice Nouns Auction House proxy contract
    INounsAuctionHouseV2 public immutable auctionHouse;

    /**
     * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
     *   STORAGE VARIABLES
     * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
     */

    struct ProposalRewardParams {
        /// @dev The minimum reward period for proposal updates if number of proposals is below `numProposalsEnoughForReward`
        uint32 minimumRewardPeriod;
        /// @dev The number of proposals required for an update before `minimumRewardPeriod` has passed
        uint8 numProposalsEnoughForReward;
        /// @dev How much bips out of the auction revenue during this period to use for rewarding proposal creation
        uint16 proposalRewardBps;
        /// @dev How much bips out of the auction revenue during this period to use for rewarding proposal voting
        uint16 votingRewardBps;
        /// @dev How many (in bips) FOR votes out of total votes are required for a proposal to be eligible for rewards
        uint16 proposalEligibilityQuorumBps;
    }

    struct AuctionRewardParams {
        /// @dev How much bips out of auction revnue to use for rewarding auction bidding
        uint16 auctionRewardBps;
        /// @dev Minimum number of auctions between updates. Zero means 1 auction is enough.
        uint8 minimumAuctionsBetweenUpdates;
    }

    /// @custom:storage-location erc7201:nouns.rewards
    struct RewardsStorage {
        /// @dev The next client token id to be minted
        uint32 nextTokenId;
        /// @dev Flag controlling if auction rewards are enabled
        bool auctionRewardsEnabled;
        /// @dev Used for auction rewards state
        uint32 nextAuctionIdToReward;
        /// @dev Flag controlling if proposal rewards are enabled
        bool proposalRewardsEnabled;
        /// @dev Used for proposal rewards state
        uint32 nextProposalIdToReward;
        /// @dev The first auction id to consider for revenue tracking on the next proposal rewards update
        uint32 nextProposalRewardFirstAuctionId;
        /// @dev Last time the proposal rewards update was performed
        uint40 lastProposalRewardsUpdate;
        /// @dev Params for both proposal rewards
        ProposalRewardParams proposalRewardParams;
        /// @dev Params for auction rewards
        AuctionRewardParams auctionRewardParams;
        /// @dev An ETH pegged ERC20 token to use for rewarding
        IERC20 ethToken;
        /// @dev admin account able to pause/unpause the contract in case of a quick response is needed
        address admin;
        /// @dev client metadata per clientId, including rewards balances, name, description
        mapping(uint32 clientId => ClientMetadata) _clientMetadata;
        /// @dev The client NFT descriptor
        address descriptor;
    }

    /// @dev This is a ERC-7201 storage location, calculated using:
    /// @dev keccak256(abi.encode(uint256(keccak256("nouns.rewards")) - 1)) & ~bytes32(uint256(0xff));
    bytes32 public constant RewardsStorageLocation = 0x9a06af3161ac5b0c3de4e6c981ab9d9f60b530386f5eaae00d541393fbecd700;

    function _getRewardsStorage() private pure returns (RewardsStorage storage $) {
        assembly {
            $.slot := RewardsStorageLocation
        }
    }

    /**
     * @dev Reverts if called by any account other than the owner or admin.
     */
    modifier onlyOwnerOrAdmin() {
        RewardsStorage storage $ = _getRewardsStorage();
        if (!(owner() == _msgSender() || $.admin == _msgSender())) revert OnlyOwnerOrAdmin();
        _;
    }

    constructor(address nounsDAO_, address auctionHouse_) initializer {
        nounsDAO = INounsDAOLogic(nounsDAO_);
        auctionHouse = INounsAuctionHouseV2(auctionHouse_);
    }

    /**
     * @param owner Address of the owner who has administration permissions as well as contract upgrade permissions
     * @param admin_ Address which has permissions to pause and unpause
     * @param ethToken_ An ETH pegged token (e.g. WETH) which will be used for rewards and gas refunds
     * @param descriptor_ Address of a INounsClientTokenDescriptor contract to provide tokenURI for the NFTs
     */
    function initialize(address owner, address admin_, address ethToken_, address descriptor_) public initializer {
        __Pausable_init_unchained();
        __ERC721_init('Nouns Client Token', 'NOUNSCLIENT');

        RewardsStorage storage $ = _getRewardsStorage();
        $.nextTokenId = 1;

        _transferOwnership(owner);
        $.admin = admin_;
        $.ethToken = IERC20(ethToken_);
        $.descriptor = descriptor_;
    }

    /**
     * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
     *   PUBLIC WRITE
     * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
     */

    /**
     * @notice Register a client, mints an NFT and assigns a clientId
     * @param name a short name identifying the client
     * @param description a longer description for the client, ideally a URL
     * @return uint32 the newly assigned clientId
     */
    function registerClient(string calldata name, string calldata description) external whenNotPaused returns (uint32) {
        RewardsStorage storage $ = _getRewardsStorage();

        uint32 tokenId = $.nextTokenId;
        $.nextTokenId = tokenId + 1;
        _mint(msg.sender, tokenId);

        ClientMetadata storage md = $._clientMetadata[tokenId];
        md.name = name;
        md.description = description;

        emit ClientRegistered(tokenId, name, description);

        return tokenId;
    }

    /**
     * @notice Update the metadata of a client
     * @dev Only the owner of the client token can update the metadata.
     * @param tokenId The token ID of the client
     * @param name The new name of the client
     * @param description The new description of the client
     */
    function updateClientMetadata(uint32 tokenId, string calldata name, string calldata description) external {
        RewardsStorage storage $ = _getRewardsStorage();

        if (ownerOf(tokenId) != msg.sender) revert OnlyNFTOwner();
        ClientMetadata storage md = $._clientMetadata[tokenId];
        md.name = name;
        md.description = description;

        emit ClientUpdated(tokenId, name, description);
    }

    /**
     * @notice Distribute rewards for auction bidding since the last update until auction with id `lastNounId`
     * If an auction's winning bid was called with a clientId, that client will be reward with `params.auctionRewardBps`
     * bips of the auction's settlement amount.
     * At least `minimumAuctionsBetweenUpdates` must happen between updates.
     * Gas spent is refunded in `ethToken`.
     * @param lastNounId the last auction id to reward client for. must be already settled.
     * @dev Gas is refunded if at least one auction was rewarded
     */
    function updateRewardsForAuctions(uint32 lastNounId) public whenNotPaused {
        uint256 startGas = gasleft();
        RewardsStorage storage $ = _getRewardsStorage();
        if (!$.auctionRewardsEnabled) revert RewardsDisabled();

        bool sawValidClientId = false;
        uint256 nextAuctionIdToReward_ = $.nextAuctionIdToReward;
        if (lastNounId < nextAuctionIdToReward_ + $.auctionRewardParams.minimumAuctionsBetweenUpdates)
            revert LastNounIdMustBeHigher();

        $.nextAuctionIdToReward = lastNounId + 1;

        INounsAuctionHouseV2.Settlement[] memory settlements = auctionHouse.getSettlements(
            nextAuctionIdToReward_,
            lastNounId + 1,
            true
        );
        INounsAuctionHouseV2.Settlement memory lastSettlement = settlements[settlements.length - 1];
        if (!(lastSettlement.nounId == lastNounId && lastSettlement.blockTimestamp > 1))
            revert LastNounIdMustBeSettled();

        uint32 maxClientId = nextTokenId() - 1;
        ClientRewardsMemoryMapping.Mapping memory m = ClientRewardsMemoryMapping.createMapping({
            maxClientId: maxClientId
        });

        for (uint256 i; i < settlements.length; ++i) {
            INounsAuctionHouseV2.Settlement memory settlement = settlements[i];
            if (settlement.clientId != 0 && settlement.clientId <= maxClientId) {
                sawValidClientId = true;
                m.inc(settlement.clientId, settlement.amount);
            }
        }

        uint16 auctionRewardBps = $.auctionRewardParams.auctionRewardBps;
        uint256 numValues = m.numValues();
        for (uint32 i = 0; i < numValues; ++i) {
            ClientRewardsMemoryMapping.ClientBalance memory cb = m.getValue(i);
            uint256 reward = (cb.balance * auctionRewardBps) / 10_000;
            $._clientMetadata[cb.clientId].rewarded += SafeCast.toUint96(reward);

            emit ClientRewarded(cb.clientId, reward);
        }

        emit AuctionRewardsUpdated(nextAuctionIdToReward_, lastNounId);

        if (sawValidClientId) {
            // refund gas only if we're actually rewarding a client, not just moving the pointer
            GasRefund.refundGas($.ethToken, startGas);
        }
    }

    /// @dev struct used to avoid stack-too-deep errors
    struct Temp {
        uint32 maxClientId;
        uint256 numEligibleVotes;
        uint256 rewardPerProposal;
        uint256 rewardPerVote;
        uint256 proposalRewardForPeriod;
        uint256 votingRewardForPeriod;
        uint256 firstAuctionIdForRevenue;
        NounsDAOTypes.ProposalForRewards lastProposal;
    }

    /**
     * @notice Distribute rewards for proposal creation and voting from the last update until `lastProposalId`.
     * A proposal is eligible for rewards if it wasn't canceled and for-votes/total-votes >= params.proposalEligibilityQuorumBps.
     * Rewards are calculated by the auctions revenue during the period between the creation time of last processed
     * eligible proposal in until the current last eligible proposal with id <= `lastProposalId`.
     * One of two conditions must be true in order for rewards to be distributed:
     * 1. There are at least `numProposalsEnoughForReward` proposals in this update
     * 2. At least `minimumRewardPeriod` time has passed since the last update until the creation time of the last
     *     eligible proposal in this update.
     * Gas spent is refunded in `ethToken`.
     * @param lastProposalId id of the last proposal to include in the rewards distribution. all proposals up to and
     * including this id must have ended voting.
     * @param votingClientIds array of sorted client ids that were used to vote on the eligible proposals in
     * this rewards distribution. Reverts if it contains duplicates. Reverts if it's not sorted. Reverts if a clientId
     * had zero votes on all eligible proposals from this update.
     * You may use `getVotingClientIds` as a convenience function to get the correct `votingClientIds`.
     */
    function updateRewardsForProposalWritingAndVoting(
        uint32 lastProposalId,
        uint32[] calldata votingClientIds
    ) public whenNotPaused {
        uint256 startGas = gasleft();
        RewardsStorage storage $ = _getRewardsStorage();
        if (!$.proposalRewardsEnabled) revert RewardsDisabled();

        Temp memory t;

        t.maxClientId = nextTokenId() - 1;
        uint32 nextProposalIdToReward_ = $.nextProposalIdToReward;

        require(
            (lastProposalId <= nounsDAO.proposalCount()) && (lastProposalId >= nextProposalIdToReward_),
            'bad lastProposalId'
        );
        require(isSortedAndNoDuplicates(votingClientIds), 'must be sorted & unique');

        NounsDAOTypes.ProposalForRewards[] memory proposals = nounsDAO.proposalDataForRewards({
            firstProposalId: nextProposalIdToReward_,
            lastProposalId: lastProposalId,
            proposalEligibilityQuorumBps: $.proposalRewardParams.proposalEligibilityQuorumBps,
            excludeCanceled: true,
            requireVotingEnded: true,
            votingClientIds: votingClientIds
        });
        require(proposals.length > 0, 'at least one eligible proposal');
        $.nextProposalIdToReward = lastProposalId + 1;

        t.lastProposal = proposals[proposals.length - 1];

        t.firstAuctionIdForRevenue = $.nextProposalRewardFirstAuctionId;
        (uint256 auctionRevenue, uint256 lastAuctionIdForRevenue) = getAuctionRevenue({
            firstNounId: t.firstAuctionIdForRevenue,
            endTimestamp: t.lastProposal.creationTimestamp
        });
        $.nextProposalRewardFirstAuctionId = uint32(lastAuctionIdForRevenue) + 1;

        require(auctionRevenue > 0, 'auctionRevenue must be > 0');

        t.proposalRewardForPeriod = (auctionRevenue * $.proposalRewardParams.proposalRewardBps) / 10_000;
        t.votingRewardForPeriod = (auctionRevenue * $.proposalRewardParams.votingRewardBps) / 10_000;

        //// First loop over the proposals:
        //// 1. Count the number of votes in eligible proposals.

        for (uint256 i; i < proposals.length; ++i) {
            uint256 votesInProposal = proposals[i].forVotes + proposals[i].againstVotes + proposals[i].abstainVotes;
            t.numEligibleVotes += votesInProposal;
        }

        //// Check that distribution is allowed:
        //// 1. One of the two conditions must be true:
        //// 1.a. Number of eligible proposals is at least `numProposalsEnoughForReward`.
        //// 1.b. At least `minimumRewardPeriod` seconds have passed since the last update.

        if (proposals.length < $.proposalRewardParams.numProposalsEnoughForReward) {
            require(
                t.lastProposal.creationTimestamp >
                    $.lastProposalRewardsUpdate + $.proposalRewardParams.minimumRewardPeriod,
                'not enough time passed'
            );
        }
        $.lastProposalRewardsUpdate = uint40(t.lastProposal.creationTimestamp);

        // Calculate the reward per proposal and per vote
        t.rewardPerProposal = t.proposalRewardForPeriod / proposals.length;
        t.rewardPerVote = t.votingRewardForPeriod / t.numEligibleVotes;

        emit ProposalRewardsUpdated(
            nextProposalIdToReward_,
            lastProposalId,
            t.firstAuctionIdForRevenue,
            lastAuctionIdForRevenue,
            auctionRevenue,
            t.rewardPerProposal,
            t.rewardPerVote
        );

        //// Second loop over the proposals:
        //// 1. Reward proposal's clientId.
        //// 2. Reward the clientIds that faciliated voting.
        //// 3. Make sure all voting clientIds were included. This is meant to avoid griefing. Otherwises one could pass
        ////    a large array of votingClientIds, spend a lot of gas, and have that gas refunded.

        ClientRewardsMemoryMapping.Mapping memory m = ClientRewardsMemoryMapping.createMapping({
            maxClientId: t.maxClientId
        });
        bool[] memory didClientIdHaveVotes = new bool[](votingClientIds.length);

        for (uint256 i; i < proposals.length; ++i) {
            uint32 clientId = proposals[i].clientId;
            if (clientId != 0 && clientId <= t.maxClientId) {
                m.inc(clientId, t.rewardPerProposal);
            }

            uint256 votesInProposal;
            NounsDAOTypes.ClientVoteData[] memory voteData = proposals[i].voteData;
            for (uint256 j; j < votingClientIds.length; ++j) {
                clientId = votingClientIds[j];
                uint256 votes = voteData[j].votes;
                didClientIdHaveVotes[j] = didClientIdHaveVotes[j] || votes > 0;
                if (clientId != 0 && clientId <= t.maxClientId) {
                    m.inc(clientId, votes * t.rewardPerVote);
                }
                votesInProposal += votes;
            }
            require(
                votesInProposal == proposals[i].forVotes + proposals[i].againstVotes + proposals[i].abstainVotes,
                'not all votes accounted'
            );
        }

        for (uint256 i = 0; i < didClientIdHaveVotes.length; ++i) {
            require(didClientIdHaveVotes[i], 'all clientId must have votes');
        }

        uint256 numValues = m.numValues();
        for (uint32 i = 0; i < numValues; ++i) {
            ClientRewardsMemoryMapping.ClientBalance memory cb = m.getValue(i);
            $._clientMetadata[cb.clientId].rewarded += SafeCast.toUint96(cb.balance);
            emit ClientRewarded(cb.clientId, cb.balance);
        }

        GasRefund.refundGas($.ethToken, startGas);
    }

    /**
     * @notice Withdraws the balance of a client
     * @dev The caller must be the owner of the NFT with id `clientId` and the client must be approved by the DAO.
     * @param clientId Which client balance to withdraw
     * @param to the address to withdraw to
     * @param amount amount to withdraw
     */
    function withdrawClientBalance(uint32 clientId, address to, uint96 amount) public whenNotPaused {
        RewardsStorage storage $ = _getRewardsStorage();
        ClientMetadata storage md = $._clientMetadata[clientId];

        if (ownerOf(clientId) != msg.sender) revert OnlyNFTOwner();
        require(md.approved, 'not approved');

        uint96 withdrawnCache = md.withdrawn;
        require(amount <= md.rewarded - withdrawnCache, 'amount too large');

        md.withdrawn = withdrawnCache + amount;

        emit ClientBalanceWithdrawal(clientId, amount, to);

        $.ethToken.safeTransfer(to, amount);
    }

    /**
     * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
     *   PUBLIC READ
     * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
     */

    /**
     * @notice Returns the withdrawable balance of client with id `clientId`
     */
    function clientBalance(uint32 clientId) public view returns (uint96) {
        RewardsStorage storage $ = _getRewardsStorage();
        ClientMetadata storage md = $._clientMetadata[clientId];
        return md.rewarded - md.withdrawn;
    }

    /**
     * @notice Returns the clientIds that are needed to be passed as a parameter to updateRewardsForProposalWritingAndVoting
     * @dev This is not meant to be called onchain because it may be very gas intensive.
     */
    function getVotingClientIds(uint32 lastProposalId) public view returns (uint32[] memory) {
        RewardsStorage storage $ = _getRewardsStorage();

        uint256 numClientIds = nextTokenId();
        uint32[] memory allClientIds = new uint32[](numClientIds);
        for (uint32 i; i < numClientIds; ++i) {
            allClientIds[i] = i;
        }
        NounsDAOTypes.ProposalForRewards[] memory proposals = nounsDAO.proposalDataForRewards({
            firstProposalId: $.nextProposalIdToReward,
            lastProposalId: lastProposalId,
            proposalEligibilityQuorumBps: $.proposalRewardParams.proposalEligibilityQuorumBps,
            excludeCanceled: true,
            requireVotingEnded: true,
            votingClientIds: allClientIds
        });

        uint32[] memory sumVotes = new uint32[](numClientIds);
        for (uint256 i; i < proposals.length; ++i) {
            for (uint256 j; j < numClientIds; ++j) {
                sumVotes[j] += proposals[i].voteData[j].votes;
            }
        }

        uint256 idx;
        uint32[] memory nonZeroClientIds = new uint32[](numClientIds);
        for (uint32 i; i < numClientIds; ++i) {
            if (sumVotes[i] > 0) nonZeroClientIds[idx++] = i;
        }

        assembly {
            mstore(nonZeroClientIds, idx)
        }

        return nonZeroClientIds;
    }

    /**
     * @notice Returns the sum of revenue via auctions from auctioning noun with id `firstNounId` until timestamp of `endTimestamp
     */
    function getAuctionRevenue(
        uint256 firstNounId,
        uint256 endTimestamp
    ) public view returns (uint256 sumRevenue, uint256 lastAuctionId) {
        INounsAuctionHouseV2.Settlement[] memory s = auctionHouse.getSettlementsFromIdtoTimestamp(
            firstNounId,
            endTimestamp,
            true
        );
        sumRevenue = sumAuctions(s);
        lastAuctionId = s[s.length - 1].nounId;
    }

    /**
     * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
     *   PUBLIC READ - STORAGE GETTERS
     * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
     */

    function nextAuctionIdToReward() public view returns (uint256) {
        return _getRewardsStorage().nextAuctionIdToReward;
    }

    function nextProposalIdToReward() public view returns (uint32) {
        return _getRewardsStorage().nextProposalIdToReward;
    }

    function nextProposalRewardFirstAuctionId() public view returns (uint256) {
        return _getRewardsStorage().nextProposalRewardFirstAuctionId;
    }

    function lastProposalRewardsUpdate() public view returns (uint256) {
        return _getRewardsStorage().lastProposalRewardsUpdate;
    }

    function getAuctionRewardParams() public view returns (AuctionRewardParams memory) {
        return _getRewardsStorage().auctionRewardParams;
    }

    function getProposalRewardParams() public view returns (ProposalRewardParams memory) {
        return _getRewardsStorage().proposalRewardParams;
    }

    function auctionRewardsEnabled() public view returns (bool) {
        return _getRewardsStorage().auctionRewardsEnabled;
    }

    function proposalRewardsEnabled() public view returns (bool) {
        return _getRewardsStorage().proposalRewardsEnabled;
    }

    function ethToken() public view returns (IERC20) {
        return _getRewardsStorage().ethToken;
    }

    function admin() public view returns (address) {
        return _getRewardsStorage().admin;
    }

    /**
     * @notice Get the metadata of a client
     */
    function clientMetadata(uint32 tokenId) public view returns (ClientMetadata memory) {
        return _getRewardsStorage()._clientMetadata[tokenId];
    }

    /**
     * @notice Get the URI of a client token
     */
    function tokenURI(uint256 tokenId) public view override returns (string memory) {
        RewardsStorage storage $ = _getRewardsStorage();
        return INounsClientTokenDescriptor($.descriptor).tokenURI(tokenId, $._clientMetadata[uint32(tokenId)]);
    }

    /**
     * @notice Get the descriptor for the client token
     */
    function descriptor() public view returns (address) {
        return _getRewardsStorage().descriptor;
    }

    /**
     * @notice Get the next token ID
     */
    function nextTokenId() public view returns (uint32) {
        return _getRewardsStorage().nextTokenId;
    }

    /**
     * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
     *   ADMIN
     * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
     */

    /**
     * @notice Set whether the client is approved to withdraw their reward balance.
     * Anyone can mint a client NFT and start earning rewards, but only approved clients can withdraw.
     * This way the DAO helps mitigate abuse.
     * @dev Only `owner` can call this function
     */
    function setClientApproval(uint32 clientId, bool approved) public onlyOwner {
        RewardsStorage storage $ = _getRewardsStorage();
        $._clientMetadata[clientId].approved = approved;
        emit ClientApprovalSet(clientId, approved);
    }

    /**
     * @notice Updates the auction rewards params
     * @dev Only `owner` can call this function
     */
    function setAuctionRewardParams(AuctionRewardParams calldata newParams) public onlyOwner {
        _getRewardsStorage().auctionRewardParams = newParams;
    }

    /**
     * @notice Enables auction rewards and sets the next auction id to reward to be the current noun on auction
     * @dev Only `owner` can call this function
     */
    function enableAuctionRewards() public onlyOwner {
        RewardsStorage storage $ = _getRewardsStorage();
        uint32 nextAuctionIdToReward = SafeCast.toUint32(auctionHouse.auction().nounId);
        $.nextAuctionIdToReward = nextAuctionIdToReward;
        $.auctionRewardsEnabled = true;

        emit AuctionRewardsEnabled(nextAuctionIdToReward);
    }

    /**
     * @notice Disables auction rewards
     * @dev Only `owner` can call this function
     */
    function disableAuctionRewards() public onlyOwner {
        _getRewardsStorage().auctionRewardsEnabled = false;

        emit AuctionRewardsDisabled();
    }

    /**
     * @notice Updates the proposal rewards params
     * @dev Only `owner` can call this function
     */
    function setProposalRewardParams(ProposalRewardParams calldata newParams) public onlyOwner {
        _getRewardsStorage().proposalRewardParams = newParams;
    }

    /**
     * @notice Enables proposal rewards and sets the next proposal ID to reward to be the next proposal to be created.
     * The first auction ID to be considered for revenue calculation is set to be the current noun in auction.
     * @dev Only `owner` can call this function
     */
    function enableProposalRewards() public onlyOwner {
        RewardsStorage storage $ = _getRewardsStorage();
        uint32 nextProposalIdToReward = SafeCast.toUint32(nounsDAO.proposalCount() + 1);
        uint32 nextProposalRewardFirstAuctionId = SafeCast.toUint32(auctionHouse.auction().nounId);
        $.nextProposalIdToReward = nextProposalIdToReward;
        $.nextProposalRewardFirstAuctionId = nextProposalRewardFirstAuctionId;
        $.lastProposalRewardsUpdate = uint40(block.timestamp);
        $.proposalRewardsEnabled = true;

        emit ProposalRewardsEnabled(nextProposalIdToReward, nextProposalRewardFirstAuctionId);
    }

    /**
     * @notice Disables proposal rewards
     * @dev Only `owner` can call this function
     */
    function disableProposalRewards() public onlyOwner {
        _getRewardsStorage().proposalRewardsEnabled = false;

        emit ProposalRewardsDisabled();
    }

    /**
     * @dev Only `owner` can call this function
     */
    function setAdmin(address newAdmin) public onlyOwner {
        _getRewardsStorage().admin = newAdmin;
    }

    /**
     * @dev Only `owner` can call this function
     */
    function setETHToken(address newToken) public onlyOwner {
        _getRewardsStorage().ethToken = IERC20(newToken);
    }

    /**
     * @notice Withdraws any ERC20 token held by the contract
     * @param token Address of ERC20 token
     * @param to Address to send tokens to
     * @param amount Amount of tokens to withdraw
     * @dev Only `owner` can call this function
     */
    function withdrawToken(address token, address to, uint256 amount) public onlyOwner {
        IERC20(token).safeTransfer(to, amount);
    }

    /**
     * @notice Pauses reward distributes, client registration and withdrawals
     * @dev Only `owner` or `admin` can call this function
     */
    function pause() public onlyOwnerOrAdmin {
        _pause();
    }

    /**
     * @notice Unpauses reward distributes, client registration and withdrawals
     * @dev Only `owner` or `admin` can call this function
     */
    function unpause() public onlyOwnerOrAdmin {
        _unpause();
    }

    /**
     * @notice Set the descriptor for the client token
     * @dev Only `owner` or `admin` can call this function
     */
    function setDescriptor(address descriptor_) public onlyOwnerOrAdmin {
        _getRewardsStorage().descriptor = descriptor_;
    }

    /**
     * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
     *   INTERNAL
     * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
     */

    function sumAuctions(INounsAuctionHouseV2.Settlement[] memory s) internal pure returns (uint256 sum) {
        for (uint256 i = 0; i < s.length; ++i) {
            sum += s[i].amount;
        }
    }

    /**
     * @dev returns true if ids is an array of increasing unique values, i.e. sorted ascending and no duplicates
     */
    function isSortedAndNoDuplicates(uint32[] memory ids) internal pure returns (bool) {
        uint256 len = ids.length;
        uint32 prevValue = ids[0];
        for (uint256 i = 1; i < len; ++i) {
            uint32 nextValue = ids[i];
            if (nextValue <= prevValue) return false;
            prevValue = nextValue;
        }
        return true;
    }

    /**
     * Only `owner` can perform an upgrade
     */
    function _authorizeUpgrade(address) internal view override onlyOwner {}
}

// SPDX-License-Identifier: GPL-3.0

/// @title Interface for Noun Auction Houses

/*********************************
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 * ░░░░░░█████████░░█████████░░░ *
 * ░░░░░░██░░░████░░██░░░████░░░ *
 * ░░██████░░░████████░░░████░░░ *
 * ░░██░░██░░░████░░██░░░████░░░ *
 * ░░██░░██░░░████░░██░░░████░░░ *
 * ░░░░░░█████████░░█████████░░░ *
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 *********************************/

pragma solidity ^0.8.6;

import '../governance/NounsDAOInterfaces.sol';

interface INounsDAOLogic {
    /**
     * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
     *   PROPOSALS
     * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
     */
    /**
     * @notice Function used to propose a new proposal. Sender must have delegates above the proposal threshold
     * @param targets Target addresses for proposal calls
     * @param values Eth values for proposal calls
     * @param signatures Function signatures for proposal calls
     * @param calldatas Calldatas for proposal calls
     * @param description String description of the proposal
     * @return uint256 Proposal id of new proposal
     */
    function propose(
        address[] memory targets,
        uint256[] memory values,
        string[] memory signatures,
        bytes[] memory calldatas,
        string memory description
    ) external returns (uint256);

    function propose(
        address[] memory targets,
        uint256[] memory values,
        string[] memory signatures,
        bytes[] memory calldatas,
        string memory description,
        uint32 clientId
    ) external returns (uint256);

    /**
     * @notice Function used to propose a new proposal. Sender must have delegates above the proposal threshold.
     * This proposal would be executed via the timelockV1 contract. This is meant to be used in case timelockV1
     * is still holding funds or has special permissions to execute on certain contracts.
     * @param targets Target addresses for proposal calls
     * @param values Eth values for proposal calls
     * @param signatures Function signatures for proposal calls
     * @param calldatas Calldatas for proposal calls
     * @param description String description of the proposal
     * @return uint256 Proposal id of new proposal
     */
    function proposeOnTimelockV1(
        address[] memory targets,
        uint256[] memory values,
        string[] memory signatures,
        bytes[] memory calldatas,
        string memory description
    ) external returns (uint256);

    function proposeBySigs(
        NounsDAOTypes.ProposerSignature[] memory proposerSignatures,
        address[] memory targets,
        uint256[] memory values,
        string[] memory signatures,
        bytes[] memory calldatas,
        string memory description,
        uint32 clientId
    ) external returns (uint256);

    /**
     * @notice Function used to propose a new proposal. Sender and signers must have delegates above the proposal threshold
     * Signers are regarded as co-proposers, and therefore have the ability to cancel the proposal at any time.
     * @param proposerSignatures Array of signers who have signed the proposal and their signatures.
     * @dev The signatures follow EIP-712. See `PROPOSAL_TYPEHASH` in NounsDAOProposals.sol
     * @param targets Target addresses for proposal calls
     * @param values Eth values for proposal calls
     * @param signatures Function signatures for proposal calls
     * @param calldatas Calldatas for proposal calls
     * @param description String description of the proposal
     * @return uint256 Proposal id of new proposal
     */
    function proposeBySigs(
        NounsDAOTypes.ProposerSignature[] memory proposerSignatures,
        address[] memory targets,
        uint256[] memory values,
        string[] memory signatures,
        bytes[] memory calldatas,
        string memory description
    ) external returns (uint256);

    /**
     * @notice Invalidates a signature that may be used for signing a new proposal.
     * Once a signature is canceled, the sender can no longer use it again.
     * If the sender changes their mind and want to sign the proposal, they can change the expiry timestamp
     * in order to produce a new signature.
     * The signature will only be invalidated when used by the sender. If used by a different account, it will
     * not be invalidated.
     * Cancelling a signature for an existing proposal will have no effect. Signers have the ability to cancel
     * a proposal they signed if necessary.
     * @param sig The signature to cancel
     */
    function cancelSig(bytes calldata sig) external;

    /**
     * @notice Update a proposal transactions and description.
     * Only the proposer can update it, and only during the updateable period.
     * @param proposalId Proposal's id
     * @param targets Updated target addresses for proposal calls
     * @param values Updated eth values for proposal calls
     * @param signatures Updated function signatures for proposal calls
     * @param calldatas Updated calldatas for proposal calls
     * @param description Updated description of the proposal
     * @param updateMessage Short message to explain the update
     */
    function updateProposal(
        uint256 proposalId,
        address[] memory targets,
        uint256[] memory values,
        string[] memory signatures,
        bytes[] memory calldatas,
        string memory description,
        string memory updateMessage
    ) external;

    /**
     * @notice Updates the proposal's description. Only the proposer can update it, and only during the updateable period.
     * @param proposalId Proposal's id
     * @param description Updated description of the proposal
     * @param updateMessage Short message to explain the update
     */
    function updateProposalDescription(
        uint256 proposalId,
        string calldata description,
        string calldata updateMessage
    ) external;

    /**
     * @notice Updates the proposal's transactions. Only the proposer can update it, and only during the updateable period.
     * @param proposalId Proposal's id
     * @param targets Updated target addresses for proposal calls
     * @param values Updated eth values for proposal calls
     * @param signatures Updated function signatures for proposal calls
     * @param calldatas Updated calldatas for proposal calls
     * @param updateMessage Short message to explain the update
     */
    function updateProposalTransactions(
        uint256 proposalId,
        address[] memory targets,
        uint256[] memory values,
        string[] memory signatures,
        bytes[] memory calldatas,
        string memory updateMessage
    ) external;

    /**
     * @notice Update a proposal's transactions and description that was created with proposeBySigs.
     * Only the proposer can update it, during the updateable period.
     * Requires the original signers to sign the update.
     * @param proposalId Proposal's id
     * @param proposerSignatures Array of signers who have signed the proposal and their signatures.
     * @dev The signatures follow EIP-712. See `UPDATE_PROPOSAL_TYPEHASH` in NounsDAOProposals.sol
     * @param targets Updated target addresses for proposal calls
     * @param values Updated eth values for proposal calls
     * @param signatures Updated function signatures for proposal calls
     * @param calldatas Updated calldatas for proposal calls
     * @param description Updated description of the proposal
     * @param updateMessage Short message to explain the update
     */
    function updateProposalBySigs(
        uint256 proposalId,
        NounsDAOTypes.ProposerSignature[] memory proposerSignatures,
        address[] memory targets,
        uint256[] memory values,
        string[] memory signatures,
        bytes[] memory calldatas,
        string memory description,
        string memory updateMessage
    ) external;

    /**
     * @notice Queues a proposal of state succeeded
     * @param proposalId The id of the proposal to queue
     */
    function queue(uint256 proposalId) external;

    /**
     * @notice Executes a queued proposal if eta has passed
     * @param proposalId The id of the proposal to execute
     */
    function execute(uint256 proposalId) external;

    /**
     * @notice Cancels a proposal only if sender is the proposer or a signer, or proposer & signers voting power
     * dropped below proposal threshold
     * @param proposalId The id of the proposal to cancel
     */
    function cancel(uint256 proposalId) external;

    /**
     * @notice Gets the state of a proposal
     * @param proposalId The id of the proposal
     * @return Proposal state
     */
    function state(uint256 proposalId) external view returns (NounsDAOTypes.ProposalState);

    /**
     * @notice Gets actions of a proposal
     * @param proposalId the id of the proposal
     * @return targets
     * @return values
     * @return signatures
     * @return calldatas
     */
    function getActions(
        uint256 proposalId
    )
        external
        view
        returns (
            address[] memory targets,
            uint256[] memory values,
            string[] memory signatures,
            bytes[] memory calldatas
        );

    /**
     * @notice Gets the receipt for a voter on a given proposal
     * @param proposalId the id of proposal
     * @param voter The address of the voter
     * @return The voting receipt
     */
    function getReceipt(uint256 proposalId, address voter) external view returns (NounsDAOTypes.Receipt memory);

    /**
     * @notice Returns the proposal details given a proposal id.
     *     The `quorumVotes` member holds the *current* quorum, given the current votes.
     * @param proposalId the proposal id to get the data for
     * @return A `ProposalCondensed` struct with the proposal data, backwards compatible with V1 and V2
     */
    function proposals(uint256 proposalId) external view returns (NounsDAOTypes.ProposalCondensedV2 memory);

    /**
     * @notice Returns the proposal details given a proposal id.
     *     The `quorumVotes` member holds the *current* quorum, given the current votes.
     * @param proposalId the proposal id to get the data for
     * @return A `ProposalCondensed` struct with the proposal data, not backwards compatible as it contains additional values
     * like `objectionPeriodEndBlock` and `signers`
     */
    function proposalsV3(uint256 proposalId) external view returns (NounsDAOTypes.ProposalCondensedV3 memory);

    function proposalDataForRewards(
        uint256 firstProposalId,
        uint256 lastProposalId,
        uint16 proposalEligibilityQuorumBps,
        bool excludeCanceled,
        bool requireVotingEnded,
        uint32[] calldata votingClientIds
    ) external view returns (NounsDAOTypes.ProposalForRewards[] memory);

    /**
     * @notice Current proposal threshold using Noun Total Supply
     * Differs from `GovernerBravo` which uses fixed amount
     */
    function proposalThreshold() external view returns (uint256);

    /**
     * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
     *   ADMIN
     * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
     */

    /**
     * @notice Admin function for setting the voting delay. Best to set voting delay to at least a few days, to give
     * voters time to make sense of proposals, e.g. 21,600 blocks which should be at least 3 days.
     * @param newVotingDelay new voting delay, in blocks
     */
    function _setVotingDelay(uint256 newVotingDelay) external;

    /**
     * @notice Admin function for setting the voting period
     * @param newVotingPeriod new voting period, in blocks
     */
    function _setVotingPeriod(uint256 newVotingPeriod) external;

    /**
     * @notice Admin function for setting the proposal threshold basis points
     * @dev newProposalThresholdBPS must be in [`MIN_PROPOSAL_THRESHOLD_BPS`,`MAX_PROPOSAL_THRESHOLD_BPS`]
     * @param newProposalThresholdBPS new proposal threshold
     */
    function _setProposalThresholdBPS(uint256 newProposalThresholdBPS) external;

    /**
     * @notice Admin function for setting the objection period duration
     * @param newObjectionPeriodDurationInBlocks new objection period duration, in blocks
     */
    function _setObjectionPeriodDurationInBlocks(uint32 newObjectionPeriodDurationInBlocks) external;

    /**
     * @notice Admin function for setting the objection period last minute window
     * @param newLastMinuteWindowInBlocks new objection period last minute window, in blocks
     */
    function _setLastMinuteWindowInBlocks(uint32 newLastMinuteWindowInBlocks) external;

    /**
     * @notice Admin function for setting the proposal updatable period
     * @param newProposalUpdatablePeriodInBlocks the new proposal updatable period, in blocks
     */
    function _setProposalUpdatablePeriodInBlocks(uint32 newProposalUpdatablePeriodInBlocks) external;

    /**
     * @notice Begins transfer of admin rights. The newPendingAdmin must call `_acceptAdmin` to finalize the transfer.
     * @dev Admin function to begin change of admin. The newPendingAdmin must call `_acceptAdmin` to finalize the transfer.
     * @param newPendingAdmin New pending admin.
     */
    function _setPendingAdmin(address newPendingAdmin) external;

    /**
     * @notice Accepts transfer of admin rights. msg.sender must be pendingAdmin
     * @dev Admin function for pending admin to accept role and update admin
     */
    function _acceptAdmin() external;

    /**
     * @notice Begins transition of vetoer. The newPendingVetoer must call _acceptVetoer to finalize the transfer.
     * @param newPendingVetoer New Pending Vetoer
     */
    function _setPendingVetoer(address newPendingVetoer) external;

    /**
     * @notice Called by the pendingVetoer to accept role and update vetoer
     */
    function _acceptVetoer() external;

    /**
     * @notice Burns veto priviledges
     * @dev Vetoer function destroying veto power forever
     */
    function _burnVetoPower() external;

    /**
     * @notice Admin function for setting the minimum quorum votes bps
     * @param newMinQuorumVotesBPS minimum quorum votes bps
     *     Must be between `MIN_QUORUM_VOTES_BPS_LOWER_BOUND` and `MIN_QUORUM_VOTES_BPS_UPPER_BOUND`
     *     Must be lower than or equal to maxQuorumVotesBPS
     */
    function _setMinQuorumVotesBPS(uint16 newMinQuorumVotesBPS) external;

    /**
     * @notice Admin function for setting the maximum quorum votes bps
     * @param newMaxQuorumVotesBPS maximum quorum votes bps
     *     Must be lower than `MAX_QUORUM_VOTES_BPS_UPPER_BOUND`
     *     Must be higher than or equal to minQuorumVotesBPS
     */
    function _setMaxQuorumVotesBPS(uint16 newMaxQuorumVotesBPS) external;

    /**
     * @notice Admin function for setting the dynamic quorum coefficient
     * @param newQuorumCoefficient the new coefficient, as a fixed point integer with 6 decimals
     */
    function _setQuorumCoefficient(uint32 newQuorumCoefficient) external;

    /**
     * @notice Admin function for setting all the dynamic quorum parameters
     * @param newMinQuorumVotesBPS minimum quorum votes bps
     *     Must be between `MIN_QUORUM_VOTES_BPS_LOWER_BOUND` and `MIN_QUORUM_VOTES_BPS_UPPER_BOUND`
     *     Must be lower than or equal to maxQuorumVotesBPS
     * @param newMaxQuorumVotesBPS maximum quorum votes bps
     *     Must be lower than `MAX_QUORUM_VOTES_BPS_UPPER_BOUND`
     *     Must be higher than or equal to minQuorumVotesBPS
     * @param newQuorumCoefficient the new coefficient, as a fixed point integer with 6 decimals
     */
    function _setDynamicQuorumParams(
        uint16 newMinQuorumVotesBPS,
        uint16 newMaxQuorumVotesBPS,
        uint32 newQuorumCoefficient
    ) external;

    /**
     * @notice Withdraws all the ETH in the contract. This is callable only by the admin (timelock).
     */
    function _withdraw() external returns (uint256, bool);

    /**
     * @notice Admin function for setting the fork period
     * @param newForkPeriod the new fork proposal period, in seconds
     */
    function _setForkPeriod(uint256 newForkPeriod) external;

    /**
     * @notice Admin function for setting the fork threshold
     * @param newForkThresholdBPS the new fork proposal threshold, in basis points
     */
    function _setForkThresholdBPS(uint256 newForkThresholdBPS) external;

    /**
     * @notice Admin function for setting the fork DAO deployer contract
     */
    function _setForkDAODeployer(address newForkDAODeployer) external;

    /**
     * @notice Admin function for setting the ERC20 tokens that are used when splitting funds to a fork
     */
    function _setErc20TokensToIncludeInFork(address[] calldata erc20tokens) external;

    /**
     * @notice Admin function for setting the fork escrow contract
     */
    function _setForkEscrow(address newForkEscrow) external;

    /**
     * @notice Admin function for setting the fork related parameters
     * @param forkEscrow_ the fork escrow contract
     * @param forkDAODeployer_ the fork dao deployer contract
     * @param erc20TokensToIncludeInFork_ the ERC20 tokens used when splitting funds to a fork
     * @param forkPeriod_ the period during which it's possible to join a fork after exeuction
     * @param forkThresholdBPS_ the threshold required of escrowed nouns in order to execute a fork
     */
    function _setForkParams(
        address forkEscrow_,
        address forkDAODeployer_,
        address[] calldata erc20TokensToIncludeInFork_,
        uint256 forkPeriod_,
        uint256 forkThresholdBPS_
    ) external;

    /**
     * @notice Admin function for setting the timelocks and admin
     * @param newTimelock the new timelock contract
     * @param newTimelockV1 the new timelockV1 contract
     * @param newAdmin the new admin address
     */
    function _setTimelocksAndAdmin(address newTimelock, address newTimelockV1, address newAdmin) external;

    /**
     * @notice Admin function for zeroing out the state variable `voteSnapshotBlockSwitchProposalId`
     * @dev We want to zero-out this state slot so we can remove this temporary variable from contract code and
     * be ready to reuse this slot.
     */
    function _zeroOutVoteSnapshotBlockSwitchProposalId() external;

    /**
     * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
     *   DYNAMIC QUORUM
     * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
     */
    /**
     * @notice Quorum votes required for a specific proposal to succeed
     * Differs from `GovernerBravo` which uses fixed amount
     */
    function quorumVotes(uint256 proposalId) external view returns (uint256);

    /**
     * @notice Calculates the required quorum of for-votes based on the amount of against-votes
     *     The more against-votes there are for a proposal, the higher the required quorum is.
     *     The quorum BPS is between `params.minQuorumVotesBPS` and params.maxQuorumVotesBPS.
     *     The additional quorum is calculated as:
     *       quorumCoefficient * againstVotesBPS
     * @dev Note the coefficient is a fixed point integer with 6 decimals
     * @param againstVotes Number of against-votes in the proposal
     * @param adjustedTotalSupply_ The adjusted total supply of Nouns at the time of proposal creation
     * @param params Configurable parameters for calculating the quorum based on againstVotes. See `DynamicQuorumParams` definition for additional details.
     * @return quorumVotes The required quorum
     */
    function dynamicQuorumVotes(
        uint256 againstVotes,
        uint256 adjustedTotalSupply_,
        NounsDAOTypes.DynamicQuorumParams memory params
    ) external pure returns (uint256);

    /**
     * @notice returns the dynamic quorum parameters values at a certain block number
     * @dev The checkpoints array must not be empty, and the block number must be higher than or equal to
     *     the block of the first checkpoint
     * @param blockNumber_ the block number to get the params at
     * @return The dynamic quorum parameters that were set at the given block number
     */
    function getDynamicQuorumParamsAt(
        uint256 blockNumber_
    ) external view returns (NounsDAOTypes.DynamicQuorumParams memory);

    /**
     * @notice Current min quorum votes using Nouns adjusted total supply
     */
    function minQuorumVotes() external view returns (uint256);

    /**
     * @notice Current max quorum votes using Nouns adjusted total supply
     */
    function maxQuorumVotes() external view returns (uint256);

    /**
     * @notice Get all quorum params checkpoints
     */
    function quorumParamsCheckpoints() external view returns (NounsDAOTypes.DynamicQuorumParamsCheckpoint[] memory);

    /**
     * @notice Get a quorum params checkpoint by its index
     */
    function quorumParamsCheckpoints(
        uint256 index
    ) external view returns (NounsDAOTypes.DynamicQuorumParamsCheckpoint memory);

    /**
     * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
     *   DAO FORK
     * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
     */

    /**
     * @notice Escrow Nouns to contribute to the fork threshold
     * @dev Requires approving the tokenIds or the entire noun token to the DAO contract
     * @param tokenIds the tokenIds to escrow. They will be sent to the DAO once the fork threshold is reached and the escrow is closed.
     * @param proposalIds array of proposal ids which are the reason for wanting to fork. This will only be used to emit event.
     * @param reason the reason for want to fork. This will only be used to emit event.
     */
    function escrowToFork(uint256[] calldata tokenIds, uint256[] calldata proposalIds, string calldata reason) external;

    /**
     * @notice Withdraw Nouns from the fork escrow. Only possible if the fork has not been executed.
     * Only allowed to withdraw tokens that the sender has escrowed.
     * @param tokenIds the tokenIds to withdraw
     */
    function withdrawFromForkEscrow(uint256[] calldata tokenIds) external;

    /**
     * @notice Execute the fork. Only possible if the fork threshold has been met.
     * This will deploy a new DAO and send part of the treasury to the new DAO's treasury.
     * This will also close the active escrow and all nouns in the escrow belong to the original DAO.
     * @return forkTreasury The address of the new DAO's treasury
     * @return forkToken The address of the new DAO's token
     */
    function executeFork() external returns (address forkTreasury, address forkToken);

    /**
     * @notice Joins a fork while a fork is active
     * @param tokenIds the tokenIds to send to the DAO in exchange for joining the fork
     * @param proposalIds array of proposal ids which are the reason for wanting to fork. This will only be used to emit event.
     * @param reason the reason for want to fork. This will only be used to emit event.
     */
    function joinFork(uint256[] calldata tokenIds, uint256[] calldata proposalIds, string calldata reason) external;

    /**
     * @notice Withdraws nouns from the fork escrow to the treasury after the fork has been executed
     * @dev Only the DAO can call this function
     * @param tokenIds the tokenIds to withdraw
     */
    function withdrawDAONounsFromEscrowToTreasury(uint256[] calldata tokenIds) external;

    /**
     * @notice Withdraws nouns from the fork escrow after the fork has been executed to an address other than the treasury
     * @dev Only the DAO can call this function
     * @param tokenIds the tokenIds to withdraw
     * @param to the address to send the nouns to
     */
    function withdrawDAONounsFromEscrowIncreasingTotalSupply(uint256[] calldata tokenIds, address to) external;

    /**
     * @notice Returns the number of nouns in supply minus nouns owned by the DAO, i.e. held in the treasury or in an
     * escrow after it has closed.
     * This is used when calculating proposal threshold, quorum, fork threshold & treasury split.
     */
    function adjustedTotalSupply() external view returns (uint256);

    /**
     * @notice returns the required number of tokens to escrow to trigger a fork
     */
    function forkThreshold() external view returns (uint256);

    /**
     * @notice Returns the number of tokens currently in escrow, contributing to the fork threshold
     */
    function numTokensInForkEscrow() external view returns (uint256);

    /**
     * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
     *   VOTES
     * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
     */

    /**
     * @notice Vetoes a proposal only if sender is the vetoer and the proposal has not been executed.
     * @param proposalId The id of the proposal to veto
     */
    function veto(uint256 proposalId) external;

    /**
     * @notice Cast a vote for a proposal
     * @param proposalId The id of the proposal to vote on
     * @param support The support value for the vote. 0=against, 1=for, 2=abstain
     */
    function castVote(uint256 proposalId, uint8 support) external;

    function castRefundableVote(uint256 proposalId, uint8 support, uint32 clientId) external;

    /**
     * @notice Cast a vote for a proposal, asking the DAO to refund gas costs.
     * Users with > 0 votes receive refunds. Refunds are partial when using a gas priority fee higher than the DAO's cap.
     * Refunds are partial when the DAO's balance is insufficient.
     * No refund is sent when the DAO's balance is empty. No refund is sent to users with no votes.
     * Voting takes place regardless of refund success.
     * @param proposalId The id of the proposal to vote on
     * @param support The support value for the vote. 0=against, 1=for, 2=abstain
     * @dev Reentrancy is defended against in `castVoteInternal` at the `receipt.hasVoted == false` require statement.
     */
    function castRefundableVote(uint256 proposalId, uint8 support) external;

    function castRefundableVoteWithReason(
        uint256 proposalId,
        uint8 support,
        string calldata reason,
        uint32 clientId
    ) external;

    /**
     * @notice Cast a vote for a proposal, asking the DAO to refund gas costs.
     * Users with > 0 votes receive refunds. Refunds are partial when using a gas priority fee higher than the DAO's cap.
     * Refunds are partial when the DAO's balance is insufficient.
     * No refund is sent when the DAO's balance is empty. No refund is sent to users with no votes.
     * Voting takes place regardless of refund success.
     * @param proposalId The id of the proposal to vote on
     * @param support The support value for the vote. 0=against, 1=for, 2=abstain
     * @param reason The reason given for the vote by the voter
     * @dev Reentrancy is defended against in `castVoteInternal` at the `receipt.hasVoted == false` require statement.
     */
    function castRefundableVoteWithReason(uint256 proposalId, uint8 support, string calldata reason) external;

    /**
     * @notice Cast a vote for a proposal with a reason
     * @param proposalId The id of the proposal to vote on
     * @param support The support value for the vote. 0=against, 1=for, 2=abstain
     * @param reason The reason given for the vote by the voter
     */
    function castVoteWithReason(uint256 proposalId, uint8 support, string calldata reason) external;

    /**
     * @notice Cast a vote for a proposal by signature
     * @dev External function that accepts EIP-712 signatures for voting on proposals.
     */
    function castVoteBySig(uint256 proposalId, uint8 support, uint8 v, bytes32 r, bytes32 s) external;

    /**
     * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
     *   STATE VARIABLE GETTERS
     * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
     */

    function admin() external view returns (address);

    function implementation() external view returns (address);

    function vetoer() external view returns (address);

    function pendingVetoer() external view returns (address);

    function votingDelay() external view returns (uint256);

    function votingPeriod() external view returns (uint256);

    function proposalThresholdBPS() external view returns (uint256);

    function quorumVotesBPS() external view returns (uint256);

    function proposalCount() external view returns (uint256);

    function timelock() external view returns (INounsDAOExecutor);

    function nouns() external view returns (NounsTokenLike);

    function latestProposalIds(address account) external view returns (uint256);

    function lastMinuteWindowInBlocks() external view returns (uint256);

    function objectionPeriodDurationInBlocks() external view returns (uint256);

    function erc20TokensToIncludeInFork() external view returns (address[] memory);

    function forkEscrow() external view returns (INounsDAOForkEscrow);

    function forkDAODeployer() external view returns (IForkDAODeployer);

    function forkEndTimestamp() external view returns (uint256);

    function forkPeriod() external view returns (uint256);

    function forkThresholdBPS() external view returns (uint256);

    function proposalUpdatablePeriodInBlocks() external view returns (uint256);

    function timelockV1() external view returns (address);

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

// SPDX-License-Identifier: GPL-3.0

/// @title Interface for Noun Auction Houses V2

/*********************************
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 * ░░░░░░█████████░░█████████░░░ *
 * ░░░░░░██░░░████░░██░░░████░░░ *
 * ░░██████░░░████████░░░████░░░ *
 * ░░██░░██░░░████░░██░░░████░░░ *
 * ░░██░░██░░░████░░██░░░████░░░ *
 * ░░░░░░█████████░░█████████░░░ *
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 *********************************/

pragma solidity ^0.8.19;

interface INounsAuctionHouseV2 {
    struct AuctionV2 {
        // ID for the Noun (ERC721 token ID)
        uint96 nounId;
        // ID of the client that facilitated the latest bid, used for client rewards
        uint32 clientId;
        // The current highest bid amount
        uint128 amount;
        // The time that the auction started
        uint40 startTime;
        // The time that the auction is scheduled to end
        uint40 endTime;
        // The address of the current highest bid
        address payable bidder;
        // Whether or not the auction has been settled
        bool settled;
    }

    /// @dev We use this struct as the return value of the `auction` function, to maintain backwards compatibility.
    struct AuctionV2View {
        // ID for the Noun (ERC721 token ID)
        uint96 nounId;
        // The current highest bid amount
        uint128 amount;
        // The time that the auction started
        uint40 startTime;
        // The time that the auction is scheduled to end
        uint40 endTime;
        // The address of the current highest bid
        address payable bidder;
        // Whether or not the auction has been settled
        bool settled;
    }

    struct SettlementState {
        // The block.timestamp when the auction was settled.
        uint32 blockTimestamp;
        // The winning bid amount, with 10 decimal places (reducing accuracy to save bits).
        uint64 amount;
        // The address of the auction winner.
        address winner;
        // ID of the client that facilitated the winning bid, used for client rewards.
        uint32 clientId;
        // Used only to warm up the storage slot for clientId without setting the clientId value.
        bool slotWarmedUp;
    }

    struct Settlement {
        // The block.timestamp when the auction was settled.
        uint32 blockTimestamp;
        // The winning bid amount, converted from 10 decimal places to 18, for better client UX.
        uint256 amount;
        // The address of the auction winner.
        address winner;
        // ID for the Noun (ERC721 token ID).
        uint256 nounId;
        // ID of the client that facilitated the winning bid, used for client rewards
        uint32 clientId;
    }

    /// @dev Using this struct when setting historic prices, and excluding clientId to save gas.
    struct SettlementNoClientId {
        // The block.timestamp when the auction was settled.
        uint32 blockTimestamp;
        // The winning bid amount, converted from 10 decimal places to 18, for better client UX.
        uint256 amount;
        // The address of the auction winner.
        address winner;
        // ID for the Noun (ERC721 token ID).
        uint256 nounId;
    }

    event AuctionCreated(uint256 indexed nounId, uint256 startTime, uint256 endTime);

    event AuctionBid(uint256 indexed nounId, address sender, uint256 value, bool extended);

    event AuctionBidWithClientId(uint256 indexed nounId, uint256 value, uint32 indexed clientId);

    event AuctionExtended(uint256 indexed nounId, uint256 endTime);

    event AuctionSettled(uint256 indexed nounId, address winner, uint256 amount);

    event AuctionSettledWithClientId(uint256 indexed nounId, uint32 indexed clientId);

    event AuctionTimeBufferUpdated(uint256 timeBuffer);

    event AuctionReservePriceUpdated(uint256 reservePrice);

    event AuctionMinBidIncrementPercentageUpdated(uint256 minBidIncrementPercentage);

    function settleAuction() external;

    function settleCurrentAndCreateNewAuction() external;

    function createBid(uint256 nounId) external payable;

    function createBid(uint256 nounId, uint32 clientId) external payable;

    function pause() external;

    function unpause() external;

    function setTimeBuffer(uint56 timeBuffer) external;

    function setReservePrice(uint192 reservePrice) external;

    function setMinBidIncrementPercentage(uint8 minBidIncrementPercentage) external;

    function auction() external view returns (AuctionV2View memory);

    function getSettlements(
        uint256 auctionCount,
        bool skipEmptyValues
    ) external view returns (Settlement[] memory settlements);

    function getPrices(uint256 auctionCount) external view returns (uint256[] memory prices);

    function getSettlements(
        uint256 startId,
        uint256 endId,
        bool skipEmptyValues
    ) external view returns (Settlement[] memory settlements);

    function getSettlementsFromIdtoTimestamp(
        uint256 startId,
        uint256 endTimestamp,
        bool skipEmptyValues
    ) external view returns (Settlement[] memory settlements);

    function warmUpSettlementState(uint256 startId, uint256 endId) external;

    function duration() external view returns (uint256);

    function biddingClient(uint256 nounId) external view returns (uint32 clientId);
}

// SPDX-License-Identifier: BSD-3-Clause

/// @title Nouns DAO Logic interfaces and events

/*********************************
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 * ░░░░░░█████████░░█████████░░░ *
 * ░░░░░░██░░░████░░██░░░████░░░ *
 * ░░██████░░░████████░░░████░░░ *
 * ░░██░░██░░░████░░██░░░████░░░ *
 * ░░██░░██░░░████░░██░░░████░░░ *
 * ░░░░░░█████████░░█████████░░░ *
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 *********************************/

// LICENSE
// NounsDAOInterfaces.sol is a modified version of Compound Lab's GovernorBravoInterfaces.sol:
// https://github.com/compound-finance/compound-protocol/blob/b9b14038612d846b83f8a009a82c38974ff2dcfe/contracts/Governance/GovernorBravoInterfaces.sol
//
// GovernorBravoInterfaces.sol source code Copyright 2020 Compound Labs, Inc. licensed under the BSD-3-Clause license.
// With modifications by Nounders DAO.
//
// Additional conditions of BSD-3-Clause can be found here: https://opensource.org/licenses/BSD-3-Clause
//
// MODIFICATIONS
// NounsDAOEvents, NounsDAOProxyStorage, NounsDAOStorageV1 add support for changes made by Nouns DAO to GovernorBravo.sol
// See NounsDAOLogicV1.sol for more details.
// NounsDAOStorageV1Adjusted and NounsDAOStorageV2 add support for a dynamic vote quorum.
// See NounsDAOLogicV2.sol for more details.
// NounsDAOStorageV3
// See NounsDAOLogicV3.sol for more details.

pragma solidity ^0.8.19;

interface NounsDAOEventsV3 {
    /// @notice An event emitted when a new proposal is created
    event ProposalCreated(
        uint256 id,
        address proposer,
        address[] targets,
        uint256[] values,
        string[] signatures,
        bytes[] calldatas,
        uint256 startBlock,
        uint256 endBlock,
        string description
    );

    /// @notice An event emitted when a new proposal is created, which includes additional information
    event ProposalCreatedWithRequirements(
        uint256 id,
        address proposer,
        address[] targets,
        uint256[] values,
        string[] signatures,
        bytes[] calldatas,
        uint256 startBlock,
        uint256 endBlock,
        uint256 proposalThreshold,
        uint256 quorumVotes,
        string description
    );

    /// @notice An event emitted when a vote has been cast on a proposal
    /// @param voter The address which casted a vote
    /// @param proposalId The proposal id which was voted on
    /// @param support Support value for the vote. 0=against, 1=for, 2=abstain
    /// @param votes Number of votes which were cast by the voter
    /// @param reason The reason given for the vote by the voter
    event VoteCast(address indexed voter, uint256 proposalId, uint8 support, uint256 votes, string reason);

    /// @notice An event emitted when a proposal has been canceled
    event ProposalCanceled(uint256 id);

    /// @notice An event emitted when a proposal has been queued in the NounsDAOExecutor
    event ProposalQueued(uint256 id, uint256 eta);

    /// @notice An event emitted when a proposal has been executed in the NounsDAOExecutor
    event ProposalExecuted(uint256 id);

    /// @notice An event emitted when a proposal has been vetoed by vetoAddress
    event ProposalVetoed(uint256 id);

    /// @notice An event emitted when the voting delay is set
    event VotingDelaySet(uint256 oldVotingDelay, uint256 newVotingDelay);

    /// @notice An event emitted when the voting period is set
    event VotingPeriodSet(uint256 oldVotingPeriod, uint256 newVotingPeriod);

    /// @notice Emitted when proposal threshold basis points is set
    event ProposalThresholdBPSSet(uint256 oldProposalThresholdBPS, uint256 newProposalThresholdBPS);

    /// @notice Emitted when quorum votes basis points is set
    event QuorumVotesBPSSet(uint256 oldQuorumVotesBPS, uint256 newQuorumVotesBPS);

    /// @notice Emitted when pendingAdmin is changed
    event NewPendingAdmin(address oldPendingAdmin, address newPendingAdmin);

    /// @notice Emitted when pendingAdmin is accepted, which means admin is updated
    event NewAdmin(address oldAdmin, address newAdmin);

    /// @notice Emitted when vetoer is changed
    event NewVetoer(address oldVetoer, address newVetoer);

    /// @notice Emitted when minQuorumVotesBPS is set
    event MinQuorumVotesBPSSet(uint16 oldMinQuorumVotesBPS, uint16 newMinQuorumVotesBPS);

    /// @notice Emitted when maxQuorumVotesBPS is set
    event MaxQuorumVotesBPSSet(uint16 oldMaxQuorumVotesBPS, uint16 newMaxQuorumVotesBPS);

    /// @notice Emitted when quorumCoefficient is set
    event QuorumCoefficientSet(uint32 oldQuorumCoefficient, uint32 newQuorumCoefficient);

    /// @notice Emitted when a voter cast a vote requesting a gas refund.
    event RefundableVote(address indexed voter, uint256 refundAmount, bool refundSent);

    /// @notice Emitted when admin withdraws the DAO's balance.
    event Withdraw(uint256 amount, bool sent);

    /// @notice Emitted when pendingVetoer is changed
    event NewPendingVetoer(address oldPendingVetoer, address newPendingVetoer);

    /// @notice An event emitted when a new proposal is created, which includes additional information
    /// @dev V3 adds `signers`, `updatePeriodEndBlock` compared to the V1/V2 event.
    /// @dev V4: Removed data that's already emitted in `ProposalCreated`, added clientId
    event ProposalCreatedWithRequirements(
        uint256 id,
        address[] signers,
        uint256 updatePeriodEndBlock,
        uint256 proposalThreshold,
        uint256 quorumVotes,
        uint32 indexed clientId
    );

    /// @notice Emitted when a proposal is created to be executed on timelockV1
    event ProposalCreatedOnTimelockV1(uint256 id);

    /// @notice Emitted when a proposal is updated
    event ProposalUpdated(
        uint256 indexed id,
        address indexed proposer,
        address[] targets,
        uint256[] values,
        string[] signatures,
        bytes[] calldatas,
        string description,
        string updateMessage
    );

    /// @notice Emitted when a proposal's transactions are updated
    event ProposalTransactionsUpdated(
        uint256 indexed id,
        address indexed proposer,
        address[] targets,
        uint256[] values,
        string[] signatures,
        bytes[] calldatas,
        string updateMessage
    );

    /// @notice Emitted when a proposal's description is updated
    event ProposalDescriptionUpdated(
        uint256 indexed id,
        address indexed proposer,
        string description,
        string updateMessage
    );

    /// @notice Emitted when a proposal is set to have an objection period
    event ProposalObjectionPeriodSet(uint256 indexed id, uint256 objectionPeriodEndBlock);

    /// @notice Emitted when someone cancels a signature
    event SignatureCancelled(address indexed signer, bytes sig);

    /// @notice An event emitted when the objection period duration is set
    event ObjectionPeriodDurationSet(
        uint32 oldObjectionPeriodDurationInBlocks,
        uint32 newObjectionPeriodDurationInBlocks
    );

    /// @notice An event emitted when the objection period last minute window is set
    event LastMinuteWindowSet(uint32 oldLastMinuteWindowInBlocks, uint32 newLastMinuteWindowInBlocks);

    /// @notice An event emitted when the proposal updatable period is set
    event ProposalUpdatablePeriodSet(
        uint32 oldProposalUpdatablePeriodInBlocks,
        uint32 newProposalUpdatablePeriodInBlocks
    );

    /// @notice Emitted when the erc20 tokens to include in a fork are set
    event ERC20TokensToIncludeInForkSet(address[] oldErc20Tokens, address[] newErc20tokens);

    /// @notice Emitted when the fork DAO deployer is set
    event ForkDAODeployerSet(address oldForkDAODeployer, address newForkDAODeployer);

    /// @notice Emitted when the during of the forking period is set
    event ForkPeriodSet(uint256 oldForkPeriod, uint256 newForkPeriod);

    /// @notice Emitted when the threhsold for forking is set
    event ForkThresholdSet(uint256 oldForkThreshold, uint256 newForkThreshold);

    /// @notice Emitted when the main timelock, timelockV1 and admin are set
    event TimelocksAndAdminSet(address timelock, address timelockV1, address admin);

    /// @notice Emitted when someones adds nouns to the fork escrow
    event EscrowedToFork(
        uint32 indexed forkId,
        address indexed owner,
        uint256[] tokenIds,
        uint256[] proposalIds,
        string reason
    );

    /// @notice Emitted when the owner withdraws their nouns from the fork escrow
    event WithdrawFromForkEscrow(uint32 indexed forkId, address indexed owner, uint256[] tokenIds);

    /// @notice Emitted when the fork is executed and the forking period begins
    event ExecuteFork(
        uint32 indexed forkId,
        address forkTreasury,
        address forkToken,
        uint256 forkEndTimestamp,
        uint256 tokensInEscrow
    );

    /// @notice Emitted when someone joins a fork during the forking period
    event JoinFork(
        uint32 indexed forkId,
        address indexed owner,
        uint256[] tokenIds,
        uint256[] proposalIds,
        string reason
    );

    /// @notice Emitted when the DAO withdraws nouns from the fork escrow after a fork has been executed
    event DAOWithdrawNounsFromEscrow(uint256[] tokenIds, address to);

    /// @notice Emitted when withdrawing nouns from escrow increases adjusted total supply
    event DAONounsSupplyIncreasedFromEscrow(uint256 numTokens, address to);

    /// @notice An event emitted when a vote has been cast with a non-zero client Id.
    /// @dev Assumes the `VoteCast` event is emitted, and that indexers can use the voter address and propose ID to
    /// find the relevant vote and set its client ID.
    event VoteCastWithClientId(address indexed voter, uint256 indexed proposalId, uint32 indexed clientId);
}

interface INounsDAOExecutor {
    function delay() external view returns (uint256);

    function GRACE_PERIOD() external view returns (uint256);

    function acceptAdmin() external;

    function queuedTransactions(bytes32 hash) external view returns (bool);

    function queueTransaction(
        address target,
        uint256 value,
        string calldata signature,
        bytes calldata data,
        uint256 eta
    ) external returns (bytes32);

    function cancelTransaction(
        address target,
        uint256 value,
        string calldata signature,
        bytes calldata data,
        uint256 eta
    ) external;

    function executeTransaction(
        address target,
        uint256 value,
        string calldata signature,
        bytes calldata data,
        uint256 eta
    ) external payable returns (bytes memory);
}

interface NounsTokenLike {
    function getPriorVotes(address account, uint256 blockNumber) external view returns (uint96);

    function totalSupply() external view returns (uint256);

    function transferFrom(address from, address to, uint256 tokenId) external;

    function safeTransferFrom(address from, address to, uint256 tokenId) external;

    function balanceOf(address owner) external view returns (uint256 balance);

    function ownerOf(uint256 tokenId) external view returns (address owner);

    function minter() external view returns (address);

    function mint() external returns (uint256);

    function setApprovalForAll(address operator, bool approved) external;
}

interface IForkDAODeployer {
    function deployForkDAO(
        uint256 forkingPeriodEndTimestamp,
        INounsDAOForkEscrow forkEscrowAddress
    ) external returns (address treasury, address token);

    function tokenImpl() external view returns (address);

    function auctionImpl() external view returns (address);

    function governorImpl() external view returns (address);

    function treasuryImpl() external view returns (address);
}

interface INounsDAOExecutorV2 is INounsDAOExecutor {
    function sendETH(address recipient, uint256 ethToSend) external;

    function sendERC20(address recipient, address erc20Token, uint256 tokensToSend) external;
}

interface INounsDAOForkEscrow {
    function markOwner(address owner, uint256[] calldata tokenIds) external;

    function returnTokensToOwner(address owner, uint256[] calldata tokenIds) external;

    function closeEscrow() external returns (uint32);

    function numTokensInEscrow() external view returns (uint256);

    function numTokensOwnedByDAO() external view returns (uint256);

    function withdrawTokens(uint256[] calldata tokenIds, address to) external;

    function forkId() external view returns (uint32);

    function nounsToken() external view returns (NounsTokenLike);

    function dao() external view returns (address);

    function ownerOfEscrowedToken(uint32 forkId_, uint256 tokenId) external view returns (address);
}

interface NounsDAOTypes {
    struct Storage {
        // ================ PROXY ================ //
        /// @notice Administrator for this contract
        address admin;
        /// @notice Pending administrator for this contract
        address pendingAdmin;
        /// @notice Active brains of Governor
        address implementation;
        // ================ V1 ================ //
        /// @notice Vetoer who has the ability to veto any proposal
        address vetoer;
        /// @notice The delay before voting on a proposal may take place, once proposed, in blocks
        uint256 votingDelay;
        /// @notice The duration of voting on a proposal, in blocks
        uint256 votingPeriod;
        /// @notice The basis point number of votes required in order for a voter to become a proposer. *DIFFERS from GovernerBravo
        uint256 proposalThresholdBPS;
        /// @notice The basis point number of votes in support of a proposal required in order for a quorum to be reached and for a vote to succeed. *DIFFERS from GovernerBravo
        uint256 quorumVotesBPS;
        /// @notice The total number of proposals
        uint256 proposalCount;
        /// @notice The address of the Nouns DAO Executor NounsDAOExecutor
        INounsDAOExecutorV2 timelock;
        /// @notice The address of the Nouns tokens
        NounsTokenLike nouns;
        /// @notice The official record of all proposals ever proposed
        mapping(uint256 => Proposal) _proposals;
        /// @notice The latest proposal for each proposer
        mapping(address => uint256) latestProposalIds;
        // ================ V2 ================ //
        DynamicQuorumParamsCheckpoint[] quorumParamsCheckpoints;
        /// @notice Pending new vetoer
        address pendingVetoer;
        // ================ V3 ================ //
        /// @notice user => sig => isCancelled: signatures that have been cancelled by the signer and are no longer valid
        mapping(address => mapping(bytes32 => bool)) cancelledSigs;
        /// @notice The number of blocks before voting ends during which the objection period can be initiated
        uint32 lastMinuteWindowInBlocks;
        /// @notice Length of the objection period in blocks
        uint32 objectionPeriodDurationInBlocks;
        /// @notice Length of proposal updatable period in block
        uint32 proposalUpdatablePeriodInBlocks;
        /// @notice address of the DAO's fork escrow contract
        INounsDAOForkEscrow forkEscrow;
        /// @notice address of the DAO's fork deployer contract
        IForkDAODeployer forkDAODeployer;
        /// @notice ERC20 tokens to include when sending funds to a deployed fork
        address[] erc20TokensToIncludeInFork;
        /// @notice The treasury contract of the last deployed fork
        address forkDAOTreasury;
        /// @notice The token contract of the last deployed fork
        address forkDAOToken;
        /// @notice Timestamp at which the last fork period ends
        uint256 forkEndTimestamp;
        /// @notice Fork period in seconds
        uint256 forkPeriod;
        /// @notice Threshold defined in basis points (10,000 = 100%) required for forking
        uint256 forkThresholdBPS;
        /// @notice Address of the original timelock
        INounsDAOExecutor timelockV1;
        /// @dev Make sure this stays the last variable in this struct, so we can delete it in the next version
        /// @dev To be zeroed-out in the upcoming DAO upgrade.
        uint256 voteSnapshotBlockSwitchProposalId;
    }

    struct Proposal {
        /// @notice Unique id for looking up a proposal
        uint32 id;
        /// @notice client id for rewards
        uint32 clientId;
        /// @notice currently unused
        uint192 _gap;
        /// @notice Creator of the proposal
        address proposer;
        /// @notice The number of votes needed to create a proposal at the time of proposal creation. *DIFFERS from GovernerBravo
        uint256 proposalThreshold;
        /// @notice The number of votes in support of a proposal required in order for a quorum to be reached and for a vote to succeed at the time of proposal creation. *DIFFERS from GovernerBravo
        uint256 quorumVotes;
        /// @notice The timestamp that the proposal will be available for execution, set once the vote succeeds
        uint256 eta;
        /// @notice the ordered list of target addresses for calls to be made
        address[] targets;
        /// @notice The ordered list of values (i.e. msg.value) to be passed to the calls to be made
        uint256[] values;
        /// @notice The ordered list of function signatures to be called
        string[] signatures;
        /// @notice The ordered list of calldata to be passed to each call
        bytes[] calldatas;
        /// @notice The block at which voting begins: holders must delegate their votes prior to this block
        uint256 startBlock;
        /// @notice The block at which voting ends: votes must be cast prior to this block
        uint256 endBlock;
        /// @notice Current number of votes in favor of this proposal
        uint256 forVotes;
        /// @notice Current number of votes in opposition to this proposal
        uint256 againstVotes;
        /// @notice Current number of votes for abstaining for this proposal
        uint256 abstainVotes;
        /// @notice Flag marking whether the proposal has been canceled
        bool canceled;
        /// @notice Flag marking whether the proposal has been vetoed
        bool vetoed;
        /// @notice Flag marking whether the proposal has been executed
        bool executed;
        /// @notice Receipts of ballots for the entire set of voters
        mapping(address => Receipt) receipts;
        /// @notice The total supply at the time of proposal creation
        uint256 totalSupply;
        /// @notice The block at which this proposal was created
        uint32 creationBlock;
        /// @notice The timestamp of the block at which this proposal was created
        uint32 creationTimestamp;
        /// @notice The last block which allows updating a proposal's description and transactions
        uint64 updatePeriodEndBlock;
        /// @notice Starts at 0 and is set to the block at which the objection period ends when the objection period is initiated
        uint64 objectionPeriodEndBlock;
        /// @dev unused for now
        uint64 placeholder;
        /// @notice The signers of a proposal, when using proposeBySigs
        address[] signers;
        /// @notice When true, a proposal would be executed on timelockV1 instead of the current timelock
        bool executeOnTimelockV1;
        /// @notice How many votes and vote transactions each clientId contributed to this proposal
        mapping(uint32 => ClientVoteData) voteClients;
    }

    struct ClientVoteData {
        /// @notice The number of votes the client facilitated on a proposal
        uint32 votes;
        /// @notice The number of vote transactions the client facilitated on a proposal
        uint32 txs;
    }

    /// @notice Ballot receipt record for a voter
    struct Receipt {
        /// @notice Whether or not a vote has been cast
        bool hasVoted;
        /// @notice Whether or not the voter supports the proposal or abstains
        uint8 support;
        /// @notice The number of votes the voter had, which were cast
        uint96 votes;
    }

    struct ProposerSignature {
        /// @notice Signature of a proposal
        bytes sig;
        /// @notice The address of the signer
        address signer;
        /// @notice The timestamp until which the signature is valid
        uint256 expirationTimestamp;
    }

    /// @notice A subset of Proposal data, used for client rewards calculation
    struct ProposalForRewards {
        /// @notice The proposal's voting period end block
        uint256 endBlock;
        /// @notice The proposal's objection period end block
        uint256 objectionPeriodEndBlock;
        /// @notice The proposal's For votes count
        uint256 forVotes;
        /// @notice The proposal's Against votes count
        uint256 againstVotes;
        /// @notice The proposal's Abstain votes count
        uint256 abstainVotes;
        /// @notice The proposal's snapshot of total supply
        uint256 totalSupply;
        /// @notice The timestamp of the block at which the proposal was created
        uint256 creationTimestamp;
        /// @notice The ID for the client that facilitated the proposal
        uint32 clientId;
        ClientVoteData[] voteData;
    }

    struct ProposalCondensedV3 {
        /// @notice Unique id for looking up a proposal
        uint256 id;
        /// @notice Creator of the proposal
        address proposer;
        /// @notice The number of votes needed to create a proposal at the time of proposal creation. *DIFFERS from GovernerBravo
        uint256 proposalThreshold;
        /// @notice The minimum number of votes in support of a proposal required in order for a quorum to be reached and for a vote to succeed at the time of proposal creation. *DIFFERS from GovernerBravo
        uint256 quorumVotes;
        /// @notice The timestamp that the proposal will be available for execution, set once the vote succeeds
        uint256 eta;
        /// @notice The block at which voting begins: holders must delegate their votes prior to this block
        uint256 startBlock;
        /// @notice The block at which voting ends: votes must be cast prior to this block
        uint256 endBlock;
        /// @notice Current number of votes in favor of this proposal
        uint256 forVotes;
        /// @notice Current number of votes in opposition to this proposal
        uint256 againstVotes;
        /// @notice Current number of votes for abstaining for this proposal
        uint256 abstainVotes;
        /// @notice Flag marking whether the proposal has been canceled
        bool canceled;
        /// @notice Flag marking whether the proposal has been vetoed
        bool vetoed;
        /// @notice Flag marking whether the proposal has been executed
        bool executed;
        /// @notice The total supply at the time of proposal creation
        uint256 totalSupply;
        /// @notice The block at which this proposal was created
        uint256 creationBlock;
        /// @notice The signers of a proposal, when using proposeBySigs
        address[] signers;
        /// @notice The last block which allows updating a proposal's description and transactions
        uint256 updatePeriodEndBlock;
        /// @notice Starts at 0 and is set to the block at which the objection period ends when the objection period is initiated
        uint256 objectionPeriodEndBlock;
        /// @notice When true, a proposal would be executed on timelockV1 instead of the current timelock
        bool executeOnTimelockV1;
    }

    struct ProposalCondensedV2 {
        /// @notice Unique id for looking up a proposal
        uint256 id;
        /// @notice Creator of the proposal
        address proposer;
        /// @notice The number of votes needed to create a proposal at the time of proposal creation. *DIFFERS from GovernerBravo
        uint256 proposalThreshold;
        /// @notice The minimum number of votes in support of a proposal required in order for a quorum to be reached and for a vote to succeed at the time of proposal creation. *DIFFERS from GovernerBravo
        uint256 quorumVotes;
        /// @notice The timestamp that the proposal will be available for execution, set once the vote succeeds
        uint256 eta;
        /// @notice The block at which voting begins: holders must delegate their votes prior to this block
        uint256 startBlock;
        /// @notice The block at which voting ends: votes must be cast prior to this block
        uint256 endBlock;
        /// @notice Current number of votes in favor of this proposal
        uint256 forVotes;
        /// @notice Current number of votes in opposition to this proposal
        uint256 againstVotes;
        /// @notice Current number of votes for abstaining for this proposal
        uint256 abstainVotes;
        /// @notice Flag marking whether the proposal has been canceled
        bool canceled;
        /// @notice Flag marking whether the proposal has been vetoed
        bool vetoed;
        /// @notice Flag marking whether the proposal has been executed
        bool executed;
        /// @notice The total supply at the time of proposal creation
        uint256 totalSupply;
        /// @notice The block at which this proposal was created
        uint256 creationBlock;
    }

    struct DynamicQuorumParams {
        /// @notice The minimum basis point number of votes in support of a proposal required in order for a quorum to be reached and for a vote to succeed.
        uint16 minQuorumVotesBPS;
        /// @notice The maximum basis point number of votes in support of a proposal required in order for a quorum to be reached and for a vote to succeed.
        uint16 maxQuorumVotesBPS;
        /// @notice The dynamic quorum coefficient
        /// @dev Assumed to be fixed point integer with 6 decimals, i.e 0.2 is represented as 0.2 * 1e6 = 200000
        uint32 quorumCoefficient;
    }

    struct NounsDAOParams {
        uint256 votingPeriod;
        uint256 votingDelay;
        uint256 proposalThresholdBPS;
        uint32 lastMinuteWindowInBlocks;
        uint32 objectionPeriodDurationInBlocks;
        uint32 proposalUpdatablePeriodInBlocks;
    }

    /// @notice A checkpoint for storing dynamic quorum params from a given block
    struct DynamicQuorumParamsCheckpoint {
        /// @notice The block at which the new values were set
        uint32 fromBlock;
        /// @notice The parameter values of this checkpoint
        DynamicQuorumParams params;
    }

    /// @notice Possible states that a proposal may be in
    enum ProposalState {
        Pending,
        Active,
        Canceled,
        Defeated,
        Succeeded,
        Queued,
        Expired,
        Executed,
        Vetoed,
        ObjectionPeriod,
        Updatable
    }
}

contract NounsDAOStorage is NounsDAOTypes {
    Storage ds;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (proxy/utils/UUPSUpgradeable.sol)

pragma solidity ^0.8.0;

import "../ERC1967/ERC1967UpgradeUpgradeable.sol";
import "./Initializable.sol";

/**
 * @dev An upgradeability mechanism designed for UUPS proxies. The functions included here can perform an upgrade of an
 * {ERC1967Proxy}, when this contract is set as the implementation behind such a proxy.
 *
 * A security mechanism ensures that an upgrade does not turn off upgradeability accidentally, although this risk is
 * reinstated if the upgrade retains upgradeability but removes the security mechanism, e.g. by replacing
 * `UUPSUpgradeable` with a custom implementation of upgrades.
 *
 * The {_authorizeUpgrade} function must be overridden to include access restriction to the upgrade mechanism.
 *
 * _Available since v4.1._
 */
abstract contract UUPSUpgradeable is Initializable, ERC1967UpgradeUpgradeable {
    function __UUPSUpgradeable_init() internal initializer {
        __ERC1967Upgrade_init_unchained();
        __UUPSUpgradeable_init_unchained();
    }

    function __UUPSUpgradeable_init_unchained() internal initializer {
    }
    /// @custom:oz-upgrades-unsafe-allow state-variable-immutable state-variable-assignment
    address private immutable __self = address(this);

    /**
     * @dev Check that the execution is being performed through a delegatecall call and that the execution context is
     * a proxy contract with an implementation (as defined in ERC1967) pointing to self. This should only be the case
     * for UUPS and transparent proxies that are using the current contract as their implementation. Execution of a
     * function through ERC1167 minimal proxies (clones) would not normally pass this test, but is not guaranteed to
     * fail.
     */
    modifier onlyProxy() {
        require(address(this) != __self, "Function must be called through delegatecall");
        require(_getImplementation() == __self, "Function must be called through active proxy");
        _;
    }

    /**
     * @dev Upgrade the implementation of the proxy to `newImplementation`.
     *
     * Calls {_authorizeUpgrade}.
     *
     * Emits an {Upgraded} event.
     */
    function upgradeTo(address newImplementation) external virtual onlyProxy {
        _authorizeUpgrade(newImplementation);
        _upgradeToAndCallSecure(newImplementation, new bytes(0), false);
    }

    /**
     * @dev Upgrade the implementation of the proxy to `newImplementation`, and subsequently execute the function call
     * encoded in `data`.
     *
     * Calls {_authorizeUpgrade}.
     *
     * Emits an {Upgraded} event.
     */
    function upgradeToAndCall(address newImplementation, bytes memory data) external payable virtual onlyProxy {
        _authorizeUpgrade(newImplementation);
        _upgradeToAndCallSecure(newImplementation, data, true);
    }

    /**
     * @dev Function that should revert when `msg.sender` is not authorized to upgrade the contract. Called by
     * {upgradeTo} and {upgradeToAndCall}.
     *
     * Normally, this function will use an xref:access.adoc[access control] modifier such as {Ownable-onlyOwner}.
     *
     * ```solidity
     * function _authorizeUpgrade(address) internal override onlyOwner {}
     * ```
     */
    function _authorizeUpgrade(address newImplementation) internal virtual;
    uint256[50] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.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));
        }
    }

    /**
     * @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 v4.4.0 (security/Pausable.sol)

pragma solidity ^0.8.0;

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

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

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

    bool private _paused;

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

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

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

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

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

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

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }
    uint256[49] private __gap;
}

// SPDX-License-Identifier: GPL-3.0

/*********************************
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 * ░░░░░░█████████░░█████████░░░ *
 * ░░░░░░██░░░████░░██░░░████░░░ *
 * ░░██████░░░████████░░░████░░░ *
 * ░░██░░██░░░████░░██░░░████░░░ *
 * ░░██░░██░░░████░░██░░░████░░░ *
 * ░░░░░░█████████░░█████████░░░ *
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 *********************************/

pragma solidity ^0.8.19;

/**
 * @notice A library for short lived in memory mappings.
 * This only works when the keys, in this case clientId, are of limited size so that they we can create
 * an array in memory for all the possible values
 */
library ClientRewardsMemoryMapping {
    struct Mapping {
        /// @dev indexes[clientId] returns the index in `values` array where the value for clientId is.
        /// zero means it hasn't been initialized yet.
        uint32[] indexes;
        /// @dev array of values. the first cell (index zero) is kept empty.
        ClientBalance[] values;
        /// @dev index of the next cell in `values` array which we can allocate for a new clientId
        uint32 nextAvailableIndex;
    }

    struct ClientBalance {
        uint32 clientId;
        uint256 balance;
    }

    /**
     * Returns a new in memory mapping.
     * @param maxClientId maximum value for a clientId key
     */
    function createMapping(uint32 maxClientId) internal pure returns (Mapping memory m) {
        m.indexes = new uint32[](maxClientId + 1);
        /// @dev index zero is reserved so allocated one extra cell
        m.values = new ClientBalance[](maxClientId + 2);
        m.nextAvailableIndex = 1; // 0 is reserved to mean unindexed
    }

    /**
     * Sets the value for client `clientId` to `balance`
     */
    function set(Mapping memory m, uint32 clientId, uint256 balance) internal pure {
        uint32 idx = m.indexes[clientId];
        if (idx == 0) {
            idx = m.nextAvailableIndex++;
            m.indexes[clientId] = idx;
            m.values[idx].clientId = clientId;
        }
        m.values[idx].balance = balance;
    }

    /**
     * Increases the value of client `clientId` by `balanceDiff`
     */
    function inc(Mapping memory m, uint32 clientId, uint256 balanceDiff) internal pure {
        uint32 idx = m.indexes[clientId];
        if (idx == 0) {
            idx = m.nextAvailableIndex++;
            m.indexes[clientId] = idx;
            m.values[idx].clientId = clientId;
        }
        m.values[idx].balance += balanceDiff;
    }

    /**
     * Returns the current value for client `clientId`
     */
    function get(Mapping memory m, uint32 clientId) internal pure returns (uint256 balance) {
        uint32 idx = m.indexes[clientId];
        if (idx == 0) return 0;
        return m.values[idx].balance;
    }

    /**
     * Returns the number of key/values stored
     */
    function numValues(Mapping memory m) internal pure returns (uint256) {
        return m.nextAvailableIndex - 1;
    }

    /**
     * Returns the idx-th value stored
     */
    function getValue(Mapping memory m, uint32 idx) internal pure returns (ClientBalance memory) {
        // zero index is unused
        return m.values[idx + 1];
    }
}

// SPDX-License-Identifier: GPL-3.0

/*********************************
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 * ░░░░░░█████████░░█████████░░░ *
 * ░░░░░░██░░░████░░██░░░████░░░ *
 * ░░██████░░░████████░░░████░░░ *
 * ░░██░░██░░░████░░██░░░████░░░ *
 * ░░██░░██░░░████░░██░░░████░░░ *
 * ░░░░░░█████████░░█████████░░░ *
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 *********************************/

pragma solidity ^0.8.19;

import { SafeERC20 } from '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol';
import { IERC20 } from '@openzeppelin/contracts/token/ERC20/IERC20.sol';

library GasRefund {
    using SafeERC20 for IERC20;

    /// @notice The maximum priority fee used to cap gas refunds
    uint256 public constant MAX_REFUND_PRIORITY_FEE = 2 gwei;

    /// @notice The vote refund gas overhead, including 7K for token transfer and 29K for general transaction overhead
    uint256 public constant REFUND_BASE_GAS = 36000;

    /// @notice The maximum basefee the DAO will refund
    uint256 public constant MAX_REFUND_BASE_FEE = 200 gwei;

    /// @dev refunds gas using the `ethToken` instead of ETH
    function refundGas(IERC20 ethToken, uint256 startGas) internal {
        unchecked {
            uint256 balance = ethToken.balanceOf(address(this));
            if (balance == 0) {
                return;
            }
            uint256 basefee = min(block.basefee, MAX_REFUND_BASE_FEE);
            uint256 gasPrice = min(tx.gasprice, basefee + MAX_REFUND_PRIORITY_FEE);
            uint256 gasUsed = startGas - gasleft() + REFUND_BASE_GAS;
            uint256 refundAmount = min(gasPrice * gasUsed, balance);
            ethToken.safeTransfer(tx.origin, refundAmount);
        }
    }

    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }
}

// SPDX-License-Identifier: GPL-3.0

/*********************************
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 * ░░░░░░█████████░░█████████░░░ *
 * ░░░░░░██░░░████░░██░░░████░░░ *
 * ░░██████░░░████████░░░████░░░ *
 * ░░██░░██░░░████░░██░░░████░░░ *
 * ░░██░░██░░░████░░██░░░████░░░ *
 * ░░░░░░█████████░░█████████░░░ *
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 *********************************/

pragma solidity ^0.8.19;

import { INounsClientTokenTypes } from './INounsClientTokenTypes.sol';

interface INounsClientTokenDescriptor {
    function tokenURI(
        uint256 tokenId,
        INounsClientTokenTypes.ClientMetadata calldata metadata
    ) external view returns (string memory);
}

// SPDX-License-Identifier: GPL-3.0

/*********************************
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 * ░░░░░░█████████░░█████████░░░ *
 * ░░░░░░██░░░████░░██░░░████░░░ *
 * ░░██████░░░████████░░░████░░░ *
 * ░░██░░██░░░████░░██░░░████░░░ *
 * ░░██░░██░░░████░░██░░░████░░░ *
 * ░░░░░░█████████░░█████████░░░ *
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 *********************************/

pragma solidity ^0.8.19;

interface INounsClientTokenTypes {
    struct ClientMetadata {
        /// @notice Whether the DAO has approved the client to withdraw their rewards.
        bool approved;
        /// @notice The amount of reward tokens this client has been rewarded.
        uint96 rewarded;
        /// @notice The amount of tokens this client has withdrawn.
        uint96 withdrawn;
        /// @dev A gap for future storage needs.
        uint56 __gap;
        /// @notice The client's display name.
        string name;
        /// @notice The client's description, e.g. its URL.
        string description;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (access/Ownable.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _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);
    }
    uint256[49] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC721/ERC721.sol)

pragma solidity ^0.8.0;

import "./IERC721Upgradeable.sol";
import "./IERC721ReceiverUpgradeable.sol";
import "./extensions/IERC721MetadataUpgradeable.sol";
import "../../utils/AddressUpgradeable.sol";
import "../../utils/ContextUpgradeable.sol";
import "../../utils/StringsUpgradeable.sol";
import "../../utils/introspection/ERC165Upgradeable.sol";
import "../../proxy/utils/Initializable.sol";

/**
 * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
 * the Metadata extension, but not including the Enumerable extension, which is available separately as
 * {ERC721Enumerable}.
 */
contract ERC721Upgradeable is Initializable, ContextUpgradeable, ERC165Upgradeable, IERC721Upgradeable, IERC721MetadataUpgradeable {
    using AddressUpgradeable for address;
    using StringsUpgradeable for uint256;

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

    // Mapping from token ID to owner address
    mapping(uint256 => address) private _owners;

    // Mapping owner address to token count
    mapping(address => uint256) private _balances;

    // Mapping from token ID to approved address
    mapping(uint256 => address) private _tokenApprovals;

    // Mapping from owner to operator approvals
    mapping(address => mapping(address => bool)) private _operatorApprovals;

    /**
     * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
     */
    function __ERC721_init(string memory name_, string memory symbol_) internal initializer {
        __Context_init_unchained();
        __ERC165_init_unchained();
        __ERC721_init_unchained(name_, symbol_);
    }

    function __ERC721_init_unchained(string memory name_, string memory symbol_) internal initializer {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165Upgradeable, IERC165Upgradeable) returns (bool) {
        return
            interfaceId == type(IERC721Upgradeable).interfaceId ||
            interfaceId == type(IERC721MetadataUpgradeable).interfaceId ||
            super.supportsInterface(interfaceId);
    }

    /**
     * @dev See {IERC721-balanceOf}.
     */
    function balanceOf(address owner) public view virtual override returns (uint256) {
        require(owner != address(0), "ERC721: balance query for the zero address");
        return _balances[owner];
    }

    /**
     * @dev See {IERC721-ownerOf}.
     */
    function ownerOf(uint256 tokenId) public view virtual override returns (address) {
        address owner = _owners[tokenId];
        require(owner != address(0), "ERC721: owner query for nonexistent token");
        return owner;
    }

    /**
     * @dev See {IERC721Metadata-name}.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev See {IERC721Metadata-symbol}.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev See {IERC721Metadata-tokenURI}.
     */
    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
        require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");

        string memory baseURI = _baseURI();
        return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
    }

    /**
     * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
     * token will be the concatenation of the `baseURI` and the `tokenId`. Empty
     * by default, can be overriden in child contracts.
     */
    function _baseURI() internal view virtual returns (string memory) {
        return "";
    }

    /**
     * @dev See {IERC721-approve}.
     */
    function approve(address to, uint256 tokenId) public virtual override {
        address owner = ERC721Upgradeable.ownerOf(tokenId);
        require(to != owner, "ERC721: approval to current owner");

        require(
            _msgSender() == owner || isApprovedForAll(owner, _msgSender()),
            "ERC721: approve caller is not owner nor approved for all"
        );

        _approve(to, tokenId);
    }

    /**
     * @dev See {IERC721-getApproved}.
     */
    function getApproved(uint256 tokenId) public view virtual override returns (address) {
        require(_exists(tokenId), "ERC721: approved query for nonexistent token");

        return _tokenApprovals[tokenId];
    }

    /**
     * @dev See {IERC721-setApprovalForAll}.
     */
    function setApprovalForAll(address operator, bool approved) public virtual override {
        _setApprovalForAll(_msgSender(), operator, approved);
    }

    /**
     * @dev See {IERC721-isApprovedForAll}.
     */
    function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
        return _operatorApprovals[owner][operator];
    }

    /**
     * @dev See {IERC721-transferFrom}.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public virtual override {
        //solhint-disable-next-line max-line-length
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");

        _transfer(from, to, tokenId);
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public virtual override {
        safeTransferFrom(from, to, tokenId, "");
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) public virtual override {
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
        _safeTransfer(from, to, tokenId, _data);
    }

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * `_data` is additional data, it has no specified format and it is sent in call to `to`.
     *
     * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
     * implement alternative mechanisms to perform token transfer, such as signature-based.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function _safeTransfer(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) internal virtual {
        _transfer(from, to, tokenId);
        require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
    }

    /**
     * @dev Returns whether `tokenId` exists.
     *
     * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
     *
     * Tokens start existing when they are minted (`_mint`),
     * and stop existing when they are burned (`_burn`).
     */
    function _exists(uint256 tokenId) internal view virtual returns (bool) {
        return _owners[tokenId] != address(0);
    }

    /**
     * @dev Returns whether `spender` is allowed to manage `tokenId`.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
        require(_exists(tokenId), "ERC721: operator query for nonexistent token");
        address owner = ERC721Upgradeable.ownerOf(tokenId);
        return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
    }

    /**
     * @dev Safely mints `tokenId` and transfers it to `to`.
     *
     * Requirements:
     *
     * - `tokenId` must not exist.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function _safeMint(address to, uint256 tokenId) internal virtual {
        _safeMint(to, tokenId, "");
    }

    /**
     * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
     * forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
     */
    function _safeMint(
        address to,
        uint256 tokenId,
        bytes memory _data
    ) internal virtual {
        _mint(to, tokenId);
        require(
            _checkOnERC721Received(address(0), to, tokenId, _data),
            "ERC721: transfer to non ERC721Receiver implementer"
        );
    }

    /**
     * @dev Mints `tokenId` and transfers it to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
     *
     * Requirements:
     *
     * - `tokenId` must not exist.
     * - `to` cannot be the zero address.
     *
     * Emits a {Transfer} event.
     */
    function _mint(address to, uint256 tokenId) internal virtual {
        require(to != address(0), "ERC721: mint to the zero address");
        require(!_exists(tokenId), "ERC721: token already minted");

        _beforeTokenTransfer(address(0), to, tokenId);

        _balances[to] += 1;
        _owners[tokenId] = to;

        emit Transfer(address(0), to, tokenId);
    }

    /**
     * @dev Destroys `tokenId`.
     * The approval is cleared when the token is burned.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     *
     * Emits a {Transfer} event.
     */
    function _burn(uint256 tokenId) internal virtual {
        address owner = ERC721Upgradeable.ownerOf(tokenId);

        _beforeTokenTransfer(owner, address(0), tokenId);

        // Clear approvals
        _approve(address(0), tokenId);

        _balances[owner] -= 1;
        delete _owners[tokenId];

        emit Transfer(owner, address(0), tokenId);
    }

    /**
     * @dev Transfers `tokenId` from `from` to `to`.
     *  As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     *
     * Emits a {Transfer} event.
     */
    function _transfer(
        address from,
        address to,
        uint256 tokenId
    ) internal virtual {
        require(ERC721Upgradeable.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
        require(to != address(0), "ERC721: transfer to the zero address");

        _beforeTokenTransfer(from, to, tokenId);

        // Clear approvals from the previous owner
        _approve(address(0), tokenId);

        _balances[from] -= 1;
        _balances[to] += 1;
        _owners[tokenId] = to;

        emit Transfer(from, to, tokenId);
    }

    /**
     * @dev Approve `to` to operate on `tokenId`
     *
     * Emits a {Approval} event.
     */
    function _approve(address to, uint256 tokenId) internal virtual {
        _tokenApprovals[tokenId] = to;
        emit Approval(ERC721Upgradeable.ownerOf(tokenId), to, tokenId);
    }

    /**
     * @dev Approve `operator` to operate on all of `owner` tokens
     *
     * Emits a {ApprovalForAll} event.
     */
    function _setApprovalForAll(
        address owner,
        address operator,
        bool approved
    ) internal virtual {
        require(owner != operator, "ERC721: approve to caller");
        _operatorApprovals[owner][operator] = approved;
        emit ApprovalForAll(owner, operator, approved);
    }

    /**
     * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
     * The call is not executed if the target address is not a contract.
     *
     * @param from address representing the previous owner of the given token ID
     * @param to target address that will receive the tokens
     * @param tokenId uint256 ID of the token to be transferred
     * @param _data bytes optional data to send along with the call
     * @return bool whether the call correctly returned the expected magic value
     */
    function _checkOnERC721Received(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) private returns (bool) {
        if (to.isContract()) {
            try IERC721ReceiverUpgradeable(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
                return retval == IERC721ReceiverUpgradeable.onERC721Received.selector;
            } catch (bytes memory reason) {
                if (reason.length == 0) {
                    revert("ERC721: transfer to non ERC721Receiver implementer");
                } else {
                    assembly {
                        revert(add(32, reason), mload(reason))
                    }
                }
            }
        } else {
            return true;
        }
    }

    /**
     * @dev Hook that is called before any token transfer. This includes minting
     * and burning.
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
     * transferred to `to`.
     * - When `from` is zero, `tokenId` will be minted for `to`.
     * - When `to` is zero, ``from``'s `tokenId` will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 tokenId
    ) internal virtual {}
    uint256[44] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/math/SafeCast.sol)

pragma solidity ^0.8.0;

/**
 * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow
 * checks.
 *
 * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can
 * easily result in undesired exploitation or bugs, since developers usually
 * assume that overflows raise errors. `SafeCast` restores this intuition by
 * reverting the transaction when such an operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 *
 * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing
 * all math on `uint256` and `int256` and then downcasting.
 */
library SafeCast {
    /**
     * @dev Returns the downcasted uint224 from uint256, reverting on
     * overflow (when the input is greater than largest uint224).
     *
     * Counterpart to Solidity's `uint224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     */
    function toUint224(uint256 value) internal pure returns (uint224) {
        require(value <= type(uint224).max, "SafeCast: value doesn't fit in 224 bits");
        return uint224(value);
    }

    /**
     * @dev Returns the downcasted uint128 from uint256, reverting on
     * overflow (when the input is greater than largest uint128).
     *
     * Counterpart to Solidity's `uint128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     */
    function toUint128(uint256 value) internal pure returns (uint128) {
        require(value <= type(uint128).max, "SafeCast: value doesn't fit in 128 bits");
        return uint128(value);
    }

    /**
     * @dev Returns the downcasted uint96 from uint256, reverting on
     * overflow (when the input is greater than largest uint96).
     *
     * Counterpart to Solidity's `uint96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     */
    function toUint96(uint256 value) internal pure returns (uint96) {
        require(value <= type(uint96).max, "SafeCast: value doesn't fit in 96 bits");
        return uint96(value);
    }

    /**
     * @dev Returns the downcasted uint64 from uint256, reverting on
     * overflow (when the input is greater than largest uint64).
     *
     * Counterpart to Solidity's `uint64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     */
    function toUint64(uint256 value) internal pure returns (uint64) {
        require(value <= type(uint64).max, "SafeCast: value doesn't fit in 64 bits");
        return uint64(value);
    }

    /**
     * @dev Returns the downcasted uint32 from uint256, reverting on
     * overflow (when the input is greater than largest uint32).
     *
     * Counterpart to Solidity's `uint32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     */
    function toUint32(uint256 value) internal pure returns (uint32) {
        require(value <= type(uint32).max, "SafeCast: value doesn't fit in 32 bits");
        return uint32(value);
    }

    /**
     * @dev Returns the downcasted uint16 from uint256, reverting on
     * overflow (when the input is greater than largest uint16).
     *
     * Counterpart to Solidity's `uint16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     */
    function toUint16(uint256 value) internal pure returns (uint16) {
        require(value <= type(uint16).max, "SafeCast: value doesn't fit in 16 bits");
        return uint16(value);
    }

    /**
     * @dev Returns the downcasted uint8 from uint256, reverting on
     * overflow (when the input is greater than largest uint8).
     *
     * Counterpart to Solidity's `uint8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits.
     */
    function toUint8(uint256 value) internal pure returns (uint8) {
        require(value <= type(uint8).max, "SafeCast: value doesn't fit in 8 bits");
        return uint8(value);
    }

    /**
     * @dev Converts a signed int256 into an unsigned uint256.
     *
     * Requirements:
     *
     * - input must be greater than or equal to 0.
     */
    function toUint256(int256 value) internal pure returns (uint256) {
        require(value >= 0, "SafeCast: value must be positive");
        return uint256(value);
    }

    /**
     * @dev Returns the downcasted int128 from int256, reverting on
     * overflow (when the input is less than smallest int128 or
     * greater than largest int128).
     *
     * Counterpart to Solidity's `int128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     *
     * _Available since v3.1._
     */
    function toInt128(int256 value) internal pure returns (int128) {
        require(value >= type(int128).min && value <= type(int128).max, "SafeCast: value doesn't fit in 128 bits");
        return int128(value);
    }

    /**
     * @dev Returns the downcasted int64 from int256, reverting on
     * overflow (when the input is less than smallest int64 or
     * greater than largest int64).
     *
     * Counterpart to Solidity's `int64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     *
     * _Available since v3.1._
     */
    function toInt64(int256 value) internal pure returns (int64) {
        require(value >= type(int64).min && value <= type(int64).max, "SafeCast: value doesn't fit in 64 bits");
        return int64(value);
    }

    /**
     * @dev Returns the downcasted int32 from int256, reverting on
     * overflow (when the input is less than smallest int32 or
     * greater than largest int32).
     *
     * Counterpart to Solidity's `int32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     *
     * _Available since v3.1._
     */
    function toInt32(int256 value) internal pure returns (int32) {
        require(value >= type(int32).min && value <= type(int32).max, "SafeCast: value doesn't fit in 32 bits");
        return int32(value);
    }

    /**
     * @dev Returns the downcasted int16 from int256, reverting on
     * overflow (when the input is less than smallest int16 or
     * greater than largest int16).
     *
     * Counterpart to Solidity's `int16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     *
     * _Available since v3.1._
     */
    function toInt16(int256 value) internal pure returns (int16) {
        require(value >= type(int16).min && value <= type(int16).max, "SafeCast: value doesn't fit in 16 bits");
        return int16(value);
    }

    /**
     * @dev Returns the downcasted int8 from int256, reverting on
     * overflow (when the input is less than smallest int8 or
     * greater than largest int8).
     *
     * Counterpart to Solidity's `int8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits.
     *
     * _Available since v3.1._
     */
    function toInt8(int256 value) internal pure returns (int8) {
        require(value >= type(int8).min && value <= type(int8).max, "SafeCast: value doesn't fit in 8 bits");
        return int8(value);
    }

    /**
     * @dev Converts an unsigned uint256 into a signed int256.
     *
     * Requirements:
     *
     * - input must be less than or equal to maxInt256.
     */
    function toInt256(uint256 value) internal pure returns (int256) {
        // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive
        require(value <= uint256(type(int256).max), "SafeCast: value doesn't fit in an int256");
        return int256(value);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (proxy/ERC1967/ERC1967Upgrade.sol)

pragma solidity ^0.8.2;

import "../beacon/IBeaconUpgradeable.sol";
import "../../utils/AddressUpgradeable.sol";
import "../../utils/StorageSlotUpgradeable.sol";
import "../utils/Initializable.sol";

/**
 * @dev This abstract contract provides getters and event emitting update functions for
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots.
 *
 * _Available since v4.1._
 *
 * @custom:oz-upgrades-unsafe-allow delegatecall
 */
abstract contract ERC1967UpgradeUpgradeable is Initializable {
    function __ERC1967Upgrade_init() internal initializer {
        __ERC1967Upgrade_init_unchained();
    }

    function __ERC1967Upgrade_init_unchained() internal initializer {
    }
    // This is the keccak-256 hash of "eip1967.proxy.rollback" subtracted by 1
    bytes32 private constant _ROLLBACK_SLOT = 0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143;

    /**
     * @dev Storage slot with the address of the current implementation.
     * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

    /**
     * @dev Emitted when the implementation is upgraded.
     */
    event Upgraded(address indexed implementation);

    /**
     * @dev Returns the current implementation address.
     */
    function _getImplementation() internal view returns (address) {
        return StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 implementation slot.
     */
    function _setImplementation(address newImplementation) private {
        require(AddressUpgradeable.isContract(newImplementation), "ERC1967: new implementation is not a contract");
        StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
    }

    /**
     * @dev Perform implementation upgrade
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeTo(address newImplementation) internal {
        _setImplementation(newImplementation);
        emit Upgraded(newImplementation);
    }

    /**
     * @dev Perform implementation upgrade with additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCall(
        address newImplementation,
        bytes memory data,
        bool forceCall
    ) internal {
        _upgradeTo(newImplementation);
        if (data.length > 0 || forceCall) {
            _functionDelegateCall(newImplementation, data);
        }
    }

    /**
     * @dev Perform implementation upgrade with security checks for UUPS proxies, and additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCallSecure(
        address newImplementation,
        bytes memory data,
        bool forceCall
    ) internal {
        address oldImplementation = _getImplementation();

        // Initial upgrade and setup call
        _setImplementation(newImplementation);
        if (data.length > 0 || forceCall) {
            _functionDelegateCall(newImplementation, data);
        }

        // Perform rollback test if not already in progress
        StorageSlotUpgradeable.BooleanSlot storage rollbackTesting = StorageSlotUpgradeable.getBooleanSlot(_ROLLBACK_SLOT);
        if (!rollbackTesting.value) {
            // Trigger rollback using upgradeTo from the new implementation
            rollbackTesting.value = true;
            _functionDelegateCall(
                newImplementation,
                abi.encodeWithSignature("upgradeTo(address)", oldImplementation)
            );
            rollbackTesting.value = false;
            // Check rollback was effective
            require(oldImplementation == _getImplementation(), "ERC1967Upgrade: upgrade breaks further upgrades");
            // Finally reset to the new implementation and log the upgrade
            _upgradeTo(newImplementation);
        }
    }

    /**
     * @dev Storage slot with the admin of the contract.
     * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;

    /**
     * @dev Emitted when the admin account has changed.
     */
    event AdminChanged(address previousAdmin, address newAdmin);

    /**
     * @dev Returns the current admin.
     */
    function _getAdmin() internal view returns (address) {
        return StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 admin slot.
     */
    function _setAdmin(address newAdmin) private {
        require(newAdmin != address(0), "ERC1967: new admin is the zero address");
        StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value = newAdmin;
    }

    /**
     * @dev Changes the admin of the proxy.
     *
     * Emits an {AdminChanged} event.
     */
    function _changeAdmin(address newAdmin) internal {
        emit AdminChanged(_getAdmin(), newAdmin);
        _setAdmin(newAdmin);
    }

    /**
     * @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
     * This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor.
     */
    bytes32 internal constant _BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;

    /**
     * @dev Emitted when the beacon is upgraded.
     */
    event BeaconUpgraded(address indexed beacon);

    /**
     * @dev Returns the current beacon.
     */
    function _getBeacon() internal view returns (address) {
        return StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value;
    }

    /**
     * @dev Stores a new beacon in the EIP1967 beacon slot.
     */
    function _setBeacon(address newBeacon) private {
        require(AddressUpgradeable.isContract(newBeacon), "ERC1967: new beacon is not a contract");
        require(
            AddressUpgradeable.isContract(IBeaconUpgradeable(newBeacon).implementation()),
            "ERC1967: beacon implementation is not a contract"
        );
        StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value = newBeacon;
    }

    /**
     * @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does
     * not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that).
     *
     * Emits a {BeaconUpgraded} event.
     */
    function _upgradeBeaconToAndCall(
        address newBeacon,
        bytes memory data,
        bool forceCall
    ) internal {
        _setBeacon(newBeacon);
        emit BeaconUpgraded(newBeacon);
        if (data.length > 0 || forceCall) {
            _functionDelegateCall(IBeaconUpgradeable(newBeacon).implementation(), data);
        }
    }

    /**
     * @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) private returns (bytes memory) {
        require(AddressUpgradeable.isContract(target), "Address: delegate call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return AddressUpgradeable.verifyCallResult(success, returndata, "Address: low-level delegate call failed");
    }
    uint256[50] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (proxy/utils/Initializable.sol)

pragma solidity ^0.8.0;

/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To initialize the implementation contract, you can either invoke the
 * initializer manually, or you can include a constructor to automatically mark it as initialized when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() initializer {}
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     */
    bool private _initialized;

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

    /**
     * @dev Modifier to protect an initializer function from being invoked twice.
     */
    modifier initializer() {
        require(_initializing || !_initialized, "Initializable: contract is already initialized");

        bool isTopLevelCall = !_initializing;
        if (isTopLevelCall) {
            _initializing = true;
            _initialized = true;
        }

        _;

        if (isTopLevelCall) {
            _initializing = false;
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/Address.sol)

pragma solidity ^0.8.0;

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

        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }

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

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

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

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

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

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

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

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

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

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

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

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

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason 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 {
            // 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

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/Context.sol)

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

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

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

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
    uint256[50] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;

import "../../utils/introspection/IERC165Upgradeable.sol";

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721Upgradeable is IERC165Upgradeable {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of tokens in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256 balance);

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address owner);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool _approved) external;

    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}
     */
    function isApprovedForAll(address owner, address operator) external view returns (bool);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes calldata data
    ) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC721/IERC721Receiver.sol)

pragma solidity ^0.8.0;

/**
 * @title ERC721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 * from ERC721 asset contracts.
 */
interface IERC721ReceiverUpgradeable {
    /**
     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
     * by `operator` from `from`, this function is called.
     *
     * It must return its Solidity selector to confirm the token transfer.
     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
     *
     * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC721/extensions/IERC721Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC721Upgradeable.sol";

/**
 * @title ERC-721 Non-Fungible Token Standard, optional metadata extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721MetadataUpgradeable is IERC721Upgradeable {
    /**
     * @dev Returns the token collection name.
     */
    function name() external view returns (string memory);

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

    /**
     * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
     */
    function tokenURI(uint256 tokenId) external view returns (string memory);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/Address.sol)

pragma solidity ^0.8.0;

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

        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }

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

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

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

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

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

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

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

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

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

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason 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 {
            // 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

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/Strings.sol)

pragma solidity ^0.8.0;

/**
 * @dev String operations.
 */
library StringsUpgradeable {
    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }
        return string(buffer);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return "0x00";
        }
        uint256 temp = value;
        uint256 length = 0;
        while (temp != 0) {
            length++;
            temp >>= 8;
        }
        return toHexString(value, length);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _HEX_SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

import "./IERC165Upgradeable.sol";
import "../../proxy/utils/Initializable.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165Upgradeable is Initializable, IERC165Upgradeable {
    function __ERC165_init() internal initializer {
        __ERC165_init_unchained();
    }

    function __ERC165_init_unchained() internal initializer {
    }
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165Upgradeable).interfaceId;
    }
    uint256[50] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (proxy/beacon/IBeacon.sol)

pragma solidity ^0.8.0;

/**
 * @dev This is the interface that {BeaconProxy} expects of its beacon.
 */
interface IBeaconUpgradeable {
    /**
     * @dev Must return an address that can be used as a delegate call target.
     *
     * {BeaconProxy} will check that this address is a contract.
     */
    function implementation() external view returns (address);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/StorageSlot.sol)

pragma solidity ^0.8.0;

/**
 * @dev Library for reading and writing primitive types to specific storage slots.
 *
 * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
 * This library helps with reading and writing to such slots without the need for inline assembly.
 *
 * The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
 *
 * Example usage to set ERC1967 implementation slot:
 * ```
 * contract ERC1967 {
 *     bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
 *
 *     function _getImplementation() internal view returns (address) {
 *         return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
 *     }
 *
 *     function _setImplementation(address newImplementation) internal {
 *         require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
 *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
 *     }
 * }
 * ```
 *
 * _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._
 */
library StorageSlotUpgradeable {
    struct AddressSlot {
        address value;
    }

    struct BooleanSlot {
        bool value;
    }

    struct Bytes32Slot {
        bytes32 value;
    }

    struct Uint256Slot {
        uint256 value;
    }

    /**
     * @dev Returns an `AddressSlot` with member `value` located at `slot`.
     */
    function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `BooleanSlot` with member `value` located at `slot`.
     */
    function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
     */
    function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Uint256Slot` with member `value` located at `slot`.
     */
    function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
        assembly {
            r.slot := slot
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165Upgradeable {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

{
  "remappings": [
    "ds-test/=lib/forge-std/lib/ds-test/src/",
    "forge-std/=lib/forge-std/src/",
    "@ensdomains/=../../node_modules/@ensdomains/",
    "@openzeppelin/=../../node_modules/@openzeppelin/",
    "base64-sol/=../../node_modules/base64-sol/",
    "eth-gas-reporter/=../../node_modules/eth-gas-reporter/",
    "hardhat/=../../node_modules/hardhat/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "paris",
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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0000000000000000000000006f3e6272a167e8accb32072d08e0957f9c79223d000000000000000000000000830bd73e4184cef73443c15111a1df14e495c706

-----Decoded View---------------
Arg [0] : nounsDAO_ (address): 0x6f3E6272A167e8AcCb32072d08E0957F9c79223d
Arg [1] : auctionHouse_ (address): 0x830BD73E4184ceF73443C15111a1DF14e495C706

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 0000000000000000000000006f3e6272a167e8accb32072d08e0957f9c79223d
Arg [1] : 000000000000000000000000830bd73e4184cef73443c15111a1df14e495c706