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// SPDX-License-Identifier: BUSL-1.1

/*
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*/

pragma solidity ^0.8.17;

import { ReentrancyGuardUpgradeable } from "@openzeppelin/contracts-upgradeable/security/ReentrancyGuardUpgradeable.sol";
import { IERC20, IERC20Metadata } from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import { SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import { ECDSA } from "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
import { SignatureChecker } from "@openzeppelin/contracts/utils/cryptography/SignatureChecker.sol";

import { IUniswapV3Pool } from "./interfaces/external/uniswap/IUniswapV3Pool.sol";

import "./utils/UUPSHelper.sol";
import { CampaignParameters } from "./struct/CampaignParameters.sol";
import { DistributionParameters } from "./struct/DistributionParameters.sol";
import { RewardTokenAmounts } from "./struct/RewardTokenAmounts.sol";

/// @title DistributionCreator
/// @author Angle Labs, Inc.
/// @notice Manages the distribution of rewards through the Merkl system
/// @dev This contract is mostly a helper for APIs built on top of Merkl
/// @dev This contract is an upgraded version and distinguishes two types of different rewards:
/// - distributions: type of campaign for concentrated liquidity pools created before Feb 15 2024,
/// now deprecated
/// - campaigns: the new more global name to describe any reward program on top of Merkl
//solhint-disable
contract DistributionCreator is UUPSHelper, ReentrancyGuardUpgradeable {
    using SafeERC20 for IERC20;

    /*//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
                                                 CONSTANTS / VARIABLES                                              
    //////////////////////////////////////////////////////////////////////////////////////////////////////////////////*/

    uint32 public constant HOUR = 3600;

    /// @notice Base for fee computation
    uint256 public constant BASE_9 = 1e9;

    uint256 public immutable CHAIN_ID = block.chainid;

    /// @notice `Core` contract handling access control
    ICore public core;

    /// @notice Contract distributing rewards to users
    address public distributor;

    /// @notice Address to which fees are forwarded
    address public feeRecipient;

    /// @notice Value (in base 10**9) of the fees taken when creating a campaign
    uint256 public defaultFees;

    /// @notice Message that needs to be acknowledged by users creating a campaign
    string public message;

    /// @notice Hash of the message that needs to be signed
    bytes32 public messageHash;

    /// @notice List of all rewards distributed in the contract on campaigns created before mid Feb 2024
    /// for concentrated liquidity pools
    DistributionParameters[] public distributionList;

    /// @notice Maps an address to its fee rebate
    mapping(address => uint256) public feeRebate;

    /// @notice Maps a token to whether it is whitelisted or not. No fees are to be paid for incentives given
    /// on pools with whitelisted tokens
    mapping(address => uint256) public isWhitelistedToken;

    /// @notice Deprecated, kept for storage compatibility
    mapping(address => uint256) public _nonces;

    /// @notice Maps an address to the last valid hash signed
    mapping(address => bytes32) public userSignatures;

    /// @notice Maps a user to whether it is whitelisted for not signing
    mapping(address => uint256) public userSignatureWhitelist;

    /// @notice Maps a token to the minimum amount that must be sent per epoch for a distribution to be valid
    /// @dev If `rewardTokenMinAmounts[token] == 0`, then `token` cannot be used as a reward
    mapping(address => uint256) public rewardTokenMinAmounts;

    /// @notice List of all reward tokens that have at some point been accepted
    address[] public rewardTokens;

    /// @notice List of all rewards ever distributed or to be distributed in the contract
    /// @dev An attacker could try to populate this list. It shouldn't be an issue as only view functions
    /// iterate on it
    CampaignParameters[] public campaignList;

    /// @notice Maps a campaignId to the ID of the campaign in the campaign list + 1
    mapping(bytes32 => uint256) internal _campaignLookup;

    /// @notice Maps a campaign type to the fees for this specific campaign
    mapping(uint32 => uint256) public campaignSpecificFees;

    /*//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
                                                        EVENTS                                                      
    //////////////////////////////////////////////////////////////////////////////////////////////////////////////////*/

    event DistributorUpdated(address indexed _distributor);
    event FeeRebateUpdated(address indexed user, uint256 userFeeRebate);
    event FeeRecipientUpdated(address indexed _feeRecipient);
    event FeesSet(uint256 _fees);
    event CampaignSpecificFeesSet(uint32 campaignType, uint256 _fees);
    event MessageUpdated(bytes32 _messageHash);
    event NewCampaign(CampaignParameters campaign);
    event NewDistribution(DistributionParameters distribution, address indexed sender);
    event RewardTokenMinimumAmountUpdated(address indexed token, uint256 amount);
    event TokenWhitelistToggled(address indexed token, uint256 toggleStatus);
    event UserSigned(bytes32 messageHash, address indexed user);
    event UserSigningWhitelistToggled(address indexed user, uint256 toggleStatus);

    /*//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
                                                       MODIFIERS                                                    
    //////////////////////////////////////////////////////////////////////////////////////////////////////////////////*/

    /// @notice Checks whether the `msg.sender` has the governor role or the guardian role
    modifier onlyGovernorOrGuardian() {
        if (!core.isGovernorOrGuardian(msg.sender)) revert NotGovernorOrGuardian();
        _;
    }

    /// @notice Checks whether the `msg.sender` has the governor role or the guardian role
    modifier onlyGovernor() {
        if (!core.isGovernor(msg.sender)) revert NotGovernor();
        _;
    }

    /// @notice Checks whether an address has signed the message or not
    modifier hasSigned() {
        if (
            userSignatureWhitelist[msg.sender] == 0 &&
            userSignatures[msg.sender] != messageHash &&
            userSignatureWhitelist[tx.origin] == 0 &&
            userSignatures[tx.origin] != messageHash
        ) revert NotSigned();
        _;
    }

    /*//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
                                                      CONSTRUCTOR                                                   
    //////////////////////////////////////////////////////////////////////////////////////////////////////////////////*/

    function initialize(ICore _core, address _distributor, uint256 _fees) external initializer {
        if (address(_core) == address(0) || _distributor == address(0)) revert ZeroAddress();
        if (_fees >= BASE_9) revert InvalidParam();
        distributor = _distributor;
        core = _core;
        defaultFees = _fees;
    }

    constructor() initializer {}

    /// @inheritdoc UUPSUpgradeable
    function _authorizeUpgrade(address) internal view override onlyGovernorUpgrader(core) {}

    /*//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
                                                 USER FACING FUNCTIONS                                              
    //////////////////////////////////////////////////////////////////////////////////////////////////////////////////*/

    /// @notice Creates a `campaign` to incentivize a given pool for a specific period of time
    /// @return The campaignId of the new campaign
    /// @dev If the campaign is badly specified, it will not be handled by the campaign script and rewards may be lost
    /// @dev Reward tokens sent as part of campaigns must have been whitelisted before and amounts
    /// sent should be bigger than a minimum amount specific to each token
    /// @dev This function reverts if the sender has not accepted the terms and conditions
    function createCampaign(CampaignParameters memory newCampaign) external nonReentrant hasSigned returns (bytes32) {
        return _createCampaign(newCampaign);
    }

    /// @notice Same as the function above but for multiple campaigns at once
    /// @return List of all the campaign amounts actually deposited for each `campaign` in the `campaigns` list
    function createCampaigns(
        CampaignParameters[] memory campaigns
    ) external nonReentrant hasSigned returns (bytes32[] memory) {
        uint256 campaignsLength = campaigns.length;
        bytes32[] memory campaignIds = new bytes32[](campaignsLength);
        for (uint256 i; i < campaignsLength; ) {
            campaignIds[i] = _createCampaign(campaigns[i]);
            unchecked {
                ++i;
            }
        }
        return campaignIds;
    }

    /// @notice Allows a user to accept the conditions without signing the message
    /// @dev Users may either call `acceptConditions` here or `sign` the message
    function acceptConditions() external {
        userSignatureWhitelist[msg.sender] = 1;
    }

    /// @notice Checks whether the `msg.sender`'s `signature` is compatible with the message
    /// to sign and stores the signature
    /// @dev If you signed the message once, and the message has not been modified, then you do not
    /// need to sign again
    function sign(bytes calldata signature) external {
        _sign(signature);
    }

    /// @notice Combines signing the message and creating a campaign
    function signAndCreateCampaign(
        CampaignParameters memory newCampaign,
        bytes calldata signature
    ) external returns (bytes32) {
        _sign(signature);
        return _createCampaign(newCampaign);
    }

    /// @notice Creates a `distribution` to incentivize a given pool for a specific period of time
    function createDistribution(
        DistributionParameters memory newDistribution
    ) external nonReentrant hasSigned returns (uint256 distributionAmount) {
        return _createDistribution(newDistribution);
    }

    /// @notice Same as the function above but for multiple distributions at once
    function createDistributions(
        DistributionParameters[] memory distributions
    ) external nonReentrant hasSigned returns (uint256[] memory) {
        uint256 distributionsLength = distributions.length;
        uint256[] memory distributionAmounts = new uint256[](distributionsLength);
        for (uint256 i; i < distributionsLength; ) {
            distributionAmounts[i] = _createDistribution(distributions[i]);
            unchecked {
                ++i;
            }
        }
        return distributionAmounts;
    }

    /*//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
                                                        GETTERS                                                     
    //////////////////////////////////////////////////////////////////////////////////////////////////////////////////*/

    /// @notice Returns the distribution at a given index converted into a campaign
    function distribution(uint256 index) external view returns (CampaignParameters memory) {
        return _convertDistribution(distributionList[index]);
    }

    /// @notice Returns the index of a campaign in the campaign list
    function campaignLookup(bytes32 _campaignId) public view returns (uint256) {
        uint256 index = _campaignLookup[_campaignId];
        if (index == 0) revert CampaignDoesNotExist();
        return index - 1;
    }

    /// @notice Returns the campaign parameters of a given campaignId
    function campaign(bytes32 _campaignId) external view returns (CampaignParameters memory) {
        return campaignList[campaignLookup(_campaignId)];
    }

    /// @notice Returns the campaign ID for a given campaign
    /// @dev The campaign ID is computed as the hash of the following parameters:
    ///  - `campaign.creator`
    ///  - `campaign.rewardToken`
    ///  - `campaign.campaignType`
    ///  - `campaign.startTimestamp`
    ///  - `campaign.duration`
    ///  - `campaign.campaignData`
    /// This prevents the creation by the same account of two campaigns with the same parameters
    /// which is not a huge issue
    function campaignId(CampaignParameters memory campaignData) public view returns (bytes32) {
        return
            bytes32(
                keccak256(
                    abi.encodePacked(
                        CHAIN_ID,
                        campaignData.creator,
                        campaignData.rewardToken,
                        campaignData.campaignType,
                        campaignData.startTimestamp,
                        campaignData.duration,
                        campaignData.campaignData
                    )
                )
            );
    }

    /// @notice Returns the list of all the reward tokens supported as well as their minimum amounts
    /// @dev Not to be queried on-chain and hence not optimized for gas consumption
    function getValidRewardTokens() external view returns (RewardTokenAmounts[] memory) {
        (RewardTokenAmounts[] memory validRewardTokens, ) = _getValidRewardTokens(0, type(uint32).max);
        return validRewardTokens;
    }

    /// @dev Not to be queried on-chain and hence not optimized for gas consumption
    function getValidRewardTokens(
        uint32 skip,
        uint32 first
    ) external view returns (RewardTokenAmounts[] memory, uint256) {
        return _getValidRewardTokens(skip, first);
    }

    /// @notice Gets all the campaigns which were live at some point between `start` and `end` timestamp
    /// @param skip Disregard distibutions with a global index lower than `skip`
    /// @param first Limit the length of the returned array to `first`
    /// @return searchCampaigns Eligible campaigns
    /// @return lastIndexCampaign Index of the last campaign assessed in the list of all campaigns
    /// @dev For pagniation purpose, in case of out of gas, you can call back the same function but with `skip` set to `lastIndexCampaign`
    /// @dev Not to be queried on-chain and hence not optimized for gas consumption
    function getCampaignsBetween(
        uint32 start,
        uint32 end,
        uint32 skip,
        uint32 first
    ) external view returns (CampaignParameters[] memory, uint256 lastIndexCampaign) {
        return _getCampaignsBetween(start, end, skip, first);
    }

    /// @notice Gets all the distributions which were live at some point between `start` and `end` timestamp
    /// @param skip Disregard distibutions with a global index lower than `skip`
    /// @param first Limit the length of the returned array to `first`
    /// @return searchDistributions Eligible distributions
    /// @return lastIndexDistribution Index of the last distribution assessed in the list of all distributions
    /// @dev For pagniation purpose, in case of out of gas, you can call back the same function but with `skip` set to `lastIndexDistribution`
    /// @dev Not to be queried on-chain and hence not optimized for gas consumption
    function getDistributionsBetweenEpochs(
        uint32 epochStart,
        uint32 epochEnd,
        uint32 skip,
        uint32 first
    ) external view returns (DistributionParameters[] memory, uint256 lastIndexDistribution) {
        return _getDistributionsBetweenEpochs(_getRoundedEpoch(epochStart), _getRoundedEpoch(epochEnd), skip, first);
    }

    /*//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
                                                 GOVERNANCE FUNCTIONS                                               
    //////////////////////////////////////////////////////////////////////////////////////////////////////////////////*/

    /// @notice Sets a new `distributor` to which rewards should be distributed
    function setNewDistributor(address _distributor) external onlyGovernor {
        if (_distributor == address(0)) revert InvalidParam();
        distributor = _distributor;
        emit DistributorUpdated(_distributor);
    }

    /// @notice Sets the defaultFees on deposit
    function setFees(uint256 _defaultFees) external onlyGovernor {
        if (_defaultFees >= BASE_9) revert InvalidParam();
        defaultFees = _defaultFees;
        emit FeesSet(_defaultFees);
    }

    /// @notice Sets the fees specific for a campaign
    /// @dev To waive the fees for a campaign, set its fees to 1
    function setCampaignFees(uint32 campaignType, uint256 _fees) external onlyGovernorOrGuardian {
        if (_fees >= BASE_9) revert InvalidParam();
        campaignSpecificFees[campaignType] = _fees;
        emit CampaignSpecificFeesSet(campaignType, _fees);
    }

    /// @notice Toggles the fee whitelist for `token`
    function toggleTokenWhitelist(address token) external onlyGovernorOrGuardian {
        uint256 toggleStatus = 1 - isWhitelistedToken[token];
        isWhitelistedToken[token] = toggleStatus;
        emit TokenWhitelistToggled(token, toggleStatus);
    }

    /// @notice Recovers fees accrued on the contract for a list of `tokens`
    function recoverFees(IERC20[] calldata tokens, address to) external onlyGovernor {
        uint256 tokensLength = tokens.length;
        for (uint256 i; i < tokensLength; ) {
            tokens[i].safeTransfer(to, tokens[i].balanceOf(address(this)));
            unchecked {
                ++i;
            }
        }
    }

    /// @notice Sets fee rebates for a given user
    function setUserFeeRebate(address user, uint256 userFeeRebate) external onlyGovernorOrGuardian {
        feeRebate[user] = userFeeRebate;
        emit FeeRebateUpdated(user, userFeeRebate);
    }

    /// @notice Sets the minimum amounts per distribution epoch for different reward tokens
    function setRewardTokenMinAmounts(
        address[] calldata tokens,
        uint256[] calldata amounts
    ) external onlyGovernorOrGuardian {
        uint256 tokensLength = tokens.length;
        if (tokensLength != amounts.length) revert InvalidLengths();
        for (uint256 i; i < tokensLength; ++i) {
            uint256 amount = amounts[i];
            // Basic logic check to make sure there are no duplicates in the `rewardTokens` table. If a token is
            // removed then re-added, it will appear as a duplicate in the list
            if (amount > 0 && rewardTokenMinAmounts[tokens[i]] == 0) rewardTokens.push(tokens[i]);
            rewardTokenMinAmounts[tokens[i]] = amount;
            emit RewardTokenMinimumAmountUpdated(tokens[i], amount);
        }
    }

    /// @notice Sets a new address to receive fees
    function setFeeRecipient(address _feeRecipient) external onlyGovernor {
        feeRecipient = _feeRecipient;
        emit FeeRecipientUpdated(_feeRecipient);
    }

    /// @notice Sets the message that needs to be signed by users before posting rewards
    function setMessage(string memory _message) external onlyGovernor {
        message = _message;
        bytes32 _messageHash = ECDSA.toEthSignedMessageHash(bytes(_message));
        messageHash = _messageHash;
        emit MessageUpdated(_messageHash);
    }

    /// @notice Toggles the whitelist status for `user` when it comes to signing messages before depositing rewards.
    function toggleSigningWhitelist(address user) external onlyGovernorOrGuardian {
        uint256 whitelistStatus = 1 - userSignatureWhitelist[user];
        userSignatureWhitelist[user] = whitelistStatus;
        emit UserSigningWhitelistToggled(user, whitelistStatus);
    }

    /*//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
                                                       INTERNAL                                                     
    //////////////////////////////////////////////////////////////////////////////////////////////////////////////////*/

    /// @notice Internal version of `createCampaign`
    function _createCampaign(CampaignParameters memory newCampaign) internal returns (bytes32) {
        uint256 rewardTokenMinAmount = rewardTokenMinAmounts[newCampaign.rewardToken];
        // if epoch parameters lead to a past campaign
        if (newCampaign.startTimestamp < block.timestamp) revert CampaignSouldStartInFuture();
        // if the campaign doesn't last at least one hour
        if (newCampaign.duration < HOUR) revert CampaignDurationBelowHour();
        // if the reward token is not whitelisted as an incentive token
        if (rewardTokenMinAmount == 0) revert CampaignRewardTokenNotWhitelisted();
        // if the amount distributed is too small with respect to what is allowed
        if ((newCampaign.amount * HOUR) / newCampaign.duration < rewardTokenMinAmount) revert CampaignRewardTooLow();

        if (newCampaign.creator == address(0)) newCampaign.creator = msg.sender;

        // Computing fees: these are waived for whitelisted addresses and if there is a whitelisted token in a pool
        uint256 _fees = campaignSpecificFees[newCampaign.campaignType];
        if (_fees == 1) _fees = 0;
        else if (_fees == 0) _fees = defaultFees;
        uint256 campaignAmountMinusFees = _computeFees(_fees, newCampaign.amount, newCampaign.rewardToken);
        newCampaign.amount = campaignAmountMinusFees;

        newCampaign.campaignId = campaignId(newCampaign);

        if (_campaignLookup[newCampaign.campaignId] != 0) revert CampaignAlreadyExists();
        _campaignLookup[newCampaign.campaignId] = campaignList.length + 1;
        campaignList.push(newCampaign);
        emit NewCampaign(newCampaign);

        return newCampaign.campaignId;
    }

    /// @notice Creates a distribution from a deprecated distribution type
    function _createDistribution(DistributionParameters memory newDistribution) internal returns (uint256) {
        _createCampaign(_convertDistribution(newDistribution));
        // Not gas efficient but deprecated
        return campaignList[campaignList.length - 1].amount;
    }

    /// @notice Converts the deprecated distribution type into a campaign
    function _convertDistribution(
        DistributionParameters memory distributionToConvert
    ) internal view returns (CampaignParameters memory) {
        uint256 wrapperLength = distributionToConvert.wrapperTypes.length;
        address[] memory whitelist = new address[](wrapperLength);
        address[] memory blacklist = new address[](wrapperLength);
        uint256 whitelistLength;
        uint256 blacklistLength;
        for (uint256 k = 0; k < wrapperLength; k++) {
            if (distributionToConvert.wrapperTypes[k] == 0) {
                whitelist[whitelistLength] = (distributionToConvert.positionWrappers[k]);
                whitelistLength += 1;
            }
            if (distributionToConvert.wrapperTypes[k] == 3) {
                blacklist[blacklistLength] = (distributionToConvert.positionWrappers[k]);
                blacklistLength += 1;
            }
        }

        assembly {
            mstore(whitelist, whitelistLength)
            mstore(blacklist, blacklistLength)
        }

        return
            CampaignParameters({
                campaignId: distributionToConvert.rewardId,
                creator: msg.sender,
                rewardToken: distributionToConvert.rewardToken,
                amount: distributionToConvert.amount,
                campaignType: 2,
                startTimestamp: distributionToConvert.epochStart,
                duration: distributionToConvert.numEpoch * HOUR,
                campaignData: abi.encode(
                    distributionToConvert.uniV3Pool,
                    distributionToConvert.propFees, // eg. 6000
                    distributionToConvert.propToken0, // eg. 3000
                    distributionToConvert.propToken1, // eg. 1000
                    distributionToConvert.isOutOfRangeIncentivized, // eg. 0
                    distributionToConvert.boostingAddress, // eg. NULL_ADDRESS
                    distributionToConvert.boostedReward, // eg. 0
                    whitelist, // eg. []
                    blacklist, // eg. []
                    "0x"
                )
            });
    }

    /// @notice Computes the fees to be taken on a campaign and transfers them to the fee recipient
    function _computeFees(
        uint256 baseFeesValue,
        uint256 distributionAmount,
        address rewardToken
    ) internal returns (uint256 distributionAmountMinusFees) {
        uint256 _fees = (baseFeesValue * (BASE_9 - feeRebate[msg.sender])) / BASE_9;
        distributionAmountMinusFees = distributionAmount;
        if (_fees != 0) {
            distributionAmountMinusFees = (distributionAmount * (BASE_9 - _fees)) / BASE_9;
            address _feeRecipient = feeRecipient;
            _feeRecipient = _feeRecipient == address(0) ? address(this) : _feeRecipient;
            IERC20(rewardToken).safeTransferFrom(
                msg.sender,
                _feeRecipient,
                distributionAmount - distributionAmountMinusFees
            );
        }
        IERC20(rewardToken).safeTransferFrom(msg.sender, distributor, distributionAmountMinusFees);
    }

    /// @notice Internal version of the `sign` function
    function _sign(bytes calldata signature) internal {
        bytes32 _messageHash = messageHash;
        if (!SignatureChecker.isValidSignatureNow(msg.sender, _messageHash, signature)) revert InvalidSignature();
        userSignatures[msg.sender] = _messageHash;
        emit UserSigned(_messageHash, msg.sender);
    }

    /// @notice Rounds an `epoch` timestamp to the start of the corresponding period
    function _getRoundedEpoch(uint32 epoch) internal pure returns (uint32) {
        return (epoch / HOUR) * HOUR;
    }

    /// @notice Internal version of `getCampaignsBetween`
    function _getCampaignsBetween(
        uint32 start,
        uint32 end,
        uint32 skip,
        uint32 first
    ) internal view returns (CampaignParameters[] memory, uint256) {
        uint256 length;
        uint256 campaignListLength = campaignList.length;
        uint256 returnSize = first > campaignListLength ? campaignListLength : first;
        CampaignParameters[] memory activeRewards = new CampaignParameters[](returnSize);
        uint32 i = skip;
        while (i < campaignListLength) {
            CampaignParameters memory campaignToProcess = campaignList[i];
            if (
                campaignToProcess.startTimestamp + campaignToProcess.duration > start &&
                campaignToProcess.startTimestamp < end
            ) {
                activeRewards[length] = campaignToProcess;
                length += 1;
            }
            unchecked {
                ++i;
            }
            if (length == returnSize) break;
        }
        assembly {
            mstore(activeRewards, length)
        }
        return (activeRewards, i);
    }

    /// @notice Internal version of `getDistributionsBetweenEpochs`
    function _getDistributionsBetweenEpochs(
        uint32 epochStart,
        uint32 epochEnd,
        uint32 skip,
        uint32 first
    ) internal view returns (DistributionParameters[] memory, uint256) {
        uint256 length;
        uint256 distributionListLength = distributionList.length;
        uint256 returnSize = first > distributionListLength ? distributionListLength : first;
        DistributionParameters[] memory activeRewards = new DistributionParameters[](returnSize);
        uint32 i = skip;
        while (i < distributionListLength) {
            DistributionParameters memory d = distributionList[i];
            if (d.epochStart + d.numEpoch * HOUR > epochStart && d.epochStart < epochEnd) {
                activeRewards[length] = d;
                length += 1;
            }
            unchecked {
                ++i;
            }
            if (length == returnSize) break;
        }
        assembly {
            mstore(activeRewards, length)
        }
        return (activeRewards, i);
    }

    /// @notice Builds the list of valid reward tokens
    function _getValidRewardTokens(
        uint32 skip,
        uint32 first
    ) internal view returns (RewardTokenAmounts[] memory, uint256) {
        uint256 length;
        uint256 rewardTokenListLength = rewardTokens.length;
        uint256 returnSize = first > rewardTokenListLength ? rewardTokenListLength : first;
        RewardTokenAmounts[] memory validRewardTokens = new RewardTokenAmounts[](returnSize);
        uint32 i = skip;
        while (i < rewardTokenListLength) {
            address token = rewardTokens[i];
            uint256 minAmount = rewardTokenMinAmounts[token];
            if (minAmount > 0) {
                validRewardTokens[length] = RewardTokenAmounts(token, minAmount);
                length += 1;
            }
            unchecked {
                ++i;
            }
            if (length == returnSize) break;
        }
        assembly {
            mstore(validRewardTokens, length)
        }
        return (validRewardTokens, i);
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[33] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (interfaces/draft-IERC1822.sol)

pragma solidity ^0.8.0;

/**
 * @dev ERC1822: Universal Upgradeable Proxy Standard (UUPS) documents a method for upgradeability through a simplified
 * proxy whose upgrades are fully controlled by the current implementation.
 */
interface IERC1822ProxiableUpgradeable {
    /**
     * @dev Returns the storage slot that the proxiable contract assumes is being used to store the implementation
     * address.
     *
     * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
     * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
     * function revert if invoked through a proxy.
     */
    function proxiableUUID() external view returns (bytes32);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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 (last updated v4.5.0) (proxy/ERC1967/ERC1967Upgrade.sol)

pragma solidity ^0.8.2;

import "../beacon/IBeaconUpgradeable.sol";
import "../../interfaces/draft-IERC1822Upgradeable.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 onlyInitializing {
    }

    function __ERC1967Upgrade_init_unchained() internal onlyInitializing {
    }
    // 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 _upgradeToAndCallUUPS(
        address newImplementation,
        bytes memory data,
        bool forceCall
    ) internal {
        // Upgrades from old implementations will perform a rollback test. This test requires the new
        // implementation to upgrade back to the old, non-ERC1822 compliant, implementation. Removing
        // this special case will break upgrade paths from old UUPS implementation to new ones.
        if (StorageSlotUpgradeable.getBooleanSlot(_ROLLBACK_SLOT).value) {
            _setImplementation(newImplementation);
        } else {
            try IERC1822ProxiableUpgradeable(newImplementation).proxiableUUID() returns (bytes32 slot) {
                require(slot == _IMPLEMENTATION_SLOT, "ERC1967Upgrade: unsupported proxiableUUID");
            } catch {
                revert("ERC1967Upgrade: new implementation is not UUPS");
            }
            _upgradeToAndCall(newImplementation, data, forceCall);
        }
    }

    /**
     * @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");
    }

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.1) (proxy/utils/Initializable.sol)

pragma solidity ^0.8.2;

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

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

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (proxy/utils/UUPSUpgradeable.sol)

pragma solidity ^0.8.0;

import "../../interfaces/draft-IERC1822Upgradeable.sol";
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, IERC1822ProxiableUpgradeable, ERC1967UpgradeUpgradeable {
    function __UUPSUpgradeable_init() internal onlyInitializing {
    }

    function __UUPSUpgradeable_init_unchained() internal onlyInitializing {
    }
    /// @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 Check that the execution is not being performed through a delegate call. This allows a function to be
     * callable on the implementing contract but not through proxies.
     */
    modifier notDelegated() {
        require(address(this) == __self, "UUPSUpgradeable: must not be called through delegatecall");
        _;
    }

    /**
     * @dev Implementation of the ERC1822 {proxiableUUID} function. This returns the storage slot used by the
     * implementation. It is used to validate the implementation's compatibility when performing an upgrade.
     *
     * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
     * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
     * function revert if invoked through a proxy. This is guaranteed by the `notDelegated` modifier.
     */
    function proxiableUUID() external view virtual override notDelegated returns (bytes32) {
        return _IMPLEMENTATION_SLOT;
    }

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

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

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

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

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

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

    uint256 private _status;

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

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

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

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

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

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

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

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

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library AddressUpgradeable {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://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 functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (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) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (interfaces/IERC1271.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC1271 standard signature validation method for
 * contracts as defined in https://eips.ethereum.org/EIPS/eip-1271[ERC-1271].
 *
 * _Available since v4.1._
 */
interface IERC1271 {
    /**
     * @dev Should return whether the signature provided is valid for the provided data
     * @param hash      Hash of the data to be signed
     * @param signature Signature byte array associated with _data
     */
    function isValidSignature(bytes32 hash, bytes memory signature) external view returns (bytes4 magicValue);
}

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

pragma solidity ^0.8.0;

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

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

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

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

pragma solidity ^0.8.0;

import "../IERC20.sol";

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

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

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://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 functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

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

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

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/cryptography/ECDSA.sol)

pragma solidity ^0.8.0;

import "../Strings.sol";

/**
 * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
 *
 * These functions can be used to verify that a message was signed by the holder
 * of the private keys of a given address.
 */
library ECDSA {
    enum RecoverError {
        NoError,
        InvalidSignature,
        InvalidSignatureLength,
        InvalidSignatureS,
        InvalidSignatureV // Deprecated in v4.8
    }

    function _throwError(RecoverError error) private pure {
        if (error == RecoverError.NoError) {
            return; // no error: do nothing
        } else if (error == RecoverError.InvalidSignature) {
            revert("ECDSA: invalid signature");
        } else if (error == RecoverError.InvalidSignatureLength) {
            revert("ECDSA: invalid signature length");
        } else if (error == RecoverError.InvalidSignatureS) {
            revert("ECDSA: invalid signature 's' value");
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature` or error string. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     *
     * Documentation for signature generation:
     * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
     * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
        if (signature.length == 65) {
            bytes32 r;
            bytes32 s;
            uint8 v;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            /// @solidity memory-safe-assembly
            assembly {
                r := mload(add(signature, 0x20))
                s := mload(add(signature, 0x40))
                v := byte(0, mload(add(signature, 0x60)))
            }
            return tryRecover(hash, v, r, s);
        } else {
            return (address(0), RecoverError.InvalidSignatureLength);
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature`. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     */
    function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, signature);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
     *
     * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address, RecoverError) {
        bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
        uint8 v = uint8((uint256(vs) >> 255) + 27);
        return tryRecover(hash, v, r, s);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
     *
     * _Available since v4.2._
     */
    function recover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, r, vs);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `v`,
     * `r` and `s` signature fields separately.
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address, RecoverError) {
        // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
        // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
        // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
        // signatures from current libraries generate a unique signature with an s-value in the lower half order.
        //
        // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
        // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
        // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
        // these malleable signatures as well.
        if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
            return (address(0), RecoverError.InvalidSignatureS);
        }

        // If the signature is valid (and not malleable), return the signer address
        address signer = ecrecover(hash, v, r, s);
        if (signer == address(0)) {
            return (address(0), RecoverError.InvalidSignature);
        }

        return (signer, RecoverError.NoError);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `v`,
     * `r` and `s` signature fields separately.
     */
    function recover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, v, r, s);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from a `hash`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
        // 32 is the length in bytes of hash,
        // enforced by the type signature above
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from `s`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s));
    }

    /**
     * @dev Returns an Ethereum Signed Typed Data, created from a
     * `domainSeparator` and a `structHash`. This produces hash corresponding
     * to the one signed with the
     * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
     * JSON-RPC method as part of EIP-712.
     *
     * See {recover}.
     */
    function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/cryptography/SignatureChecker.sol)

pragma solidity ^0.8.0;

import "./ECDSA.sol";
import "../Address.sol";
import "../../interfaces/IERC1271.sol";

/**
 * @dev Signature verification helper that can be used instead of `ECDSA.recover` to seamlessly support both ECDSA
 * signatures from externally owned accounts (EOAs) as well as ERC1271 signatures from smart contract wallets like
 * Argent and Gnosis Safe.
 *
 * _Available since v4.1._
 */
library SignatureChecker {
    /**
     * @dev Checks if a signature is valid for a given signer and data hash. If the signer is a smart contract, the
     * signature is validated against that smart contract using ERC1271, otherwise it's validated using `ECDSA.recover`.
     *
     * NOTE: Unlike ECDSA signatures, contract signatures are revocable, and the outcome of this function can thus
     * change through time. It could return true at block N and false at block N+1 (or the opposite).
     */
    function isValidSignatureNow(
        address signer,
        bytes32 hash,
        bytes memory signature
    ) internal view returns (bool) {
        (address recovered, ECDSA.RecoverError error) = ECDSA.tryRecover(hash, signature);
        if (error == ECDSA.RecoverError.NoError && recovered == signer) {
            return true;
        }

        (bool success, bytes memory result) = signer.staticcall(
            abi.encodeWithSelector(IERC1271.isValidSignature.selector, hash, signature)
        );
        return (success &&
            result.length == 32 &&
            abi.decode(result, (bytes32)) == bytes32(IERC1271.isValidSignature.selector));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/Math.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    enum Rounding {
        Down, // Toward negative infinity
        Up, // Toward infinity
        Zero // Toward zero
    }

    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

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

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds up instead
     * of rounding down.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a == 0 ? 0 : (a - 1) / b + 1;
    }

    /**
     * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
     * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
     * with further edits by Uniswap Labs also under MIT license.
     */
    function mulDiv(
        uint256 x,
        uint256 y,
        uint256 denominator
    ) internal pure returns (uint256 result) {
        unchecked {
            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
            // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2^256 + prod0.
            uint256 prod0; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                prod0 := mul(x, y)
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            require(denominator > prod1);

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [prod1 prod0].
            uint256 remainder;
            assembly {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

                // Subtract 256 bit number from 512 bit number.
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
            // See https://cs.stackexchange.com/q/138556/92363.

            // Does not overflow because the denominator cannot be zero at this stage in the function.
            uint256 twos = denominator & (~denominator + 1);
            assembly {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

                // Divide [prod1 prod0] by twos.
                prod0 := div(prod0, twos)

                // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
                twos := add(div(sub(0, twos), twos), 1)
            }

            // Shift in bits from prod1 into prod0.
            prod0 |= prod1 * twos;

            // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
            // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv = 1 mod 2^4.
            uint256 inverse = (3 * denominator) ^ 2;

            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
            // in modular arithmetic, doubling the correct bits in each step.
            inverse *= 2 - denominator * inverse; // inverse mod 2^8
            inverse *= 2 - denominator * inverse; // inverse mod 2^16
            inverse *= 2 - denominator * inverse; // inverse mod 2^32
            inverse *= 2 - denominator * inverse; // inverse mod 2^64
            inverse *= 2 - denominator * inverse; // inverse mod 2^128
            inverse *= 2 - denominator * inverse; // inverse mod 2^256

            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
            // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
            // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
            // is no longer required.
            result = prod0 * inverse;
            return result;
        }
    }

    /**
     * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
     */
    function mulDiv(
        uint256 x,
        uint256 y,
        uint256 denominator,
        Rounding rounding
    ) internal pure returns (uint256) {
        uint256 result = mulDiv(x, y, denominator);
        if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
            result += 1;
        }
        return result;
    }

    /**
     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
     *
     * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
        //
        // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
        // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
        //
        // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
        // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
        // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
        //
        // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1 << (log2(a) >> 1);

        // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
        // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
        // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
        // into the expected uint128 result.
        unchecked {
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            return min(result, a / result);
        }
    }

    /**
     * @notice Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = sqrt(a);
            return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 2, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 128;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 64;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 32;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 16;
            }
            if (value >> 8 > 0) {
                value >>= 8;
                result += 8;
            }
            if (value >> 4 > 0) {
                value >>= 4;
                result += 4;
            }
            if (value >> 2 > 0) {
                value >>= 2;
                result += 2;
            }
            if (value >> 1 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log2(value);
            return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 10, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >= 10**64) {
                value /= 10**64;
                result += 64;
            }
            if (value >= 10**32) {
                value /= 10**32;
                result += 32;
            }
            if (value >= 10**16) {
                value /= 10**16;
                result += 16;
            }
            if (value >= 10**8) {
                value /= 10**8;
                result += 8;
            }
            if (value >= 10**4) {
                value /= 10**4;
                result += 4;
            }
            if (value >= 10**2) {
                value /= 10**2;
                result += 2;
            }
            if (value >= 10**1) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log10(value);
            return result + (rounding == Rounding.Up && 10**result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 256, rounded down, of a positive value.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 16;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 8;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 4;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 2;
            }
            if (value >> 8 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + (rounding == Rounding.Up && 1 << (result * 8) < value ? 1 : 0);
        }
    }
}

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

pragma solidity ^0.8.0;

import "./math/Math.sol";

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _SYMBOLS = "0123456789abcdef";
    uint8 private constant _ADDRESS_LENGTH = 20;

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        unchecked {
            uint256 length = Math.log10(value) + 1;
            string memory buffer = new string(length);
            uint256 ptr;
            /// @solidity memory-safe-assembly
            assembly {
                ptr := add(buffer, add(32, length))
            }
            while (true) {
                ptr--;
                /// @solidity memory-safe-assembly
                assembly {
                    mstore8(ptr, byte(mod(value, 10), _SYMBOLS))
                }
                value /= 10;
                if (value == 0) break;
            }
            return buffer;
        }
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        unchecked {
            return toHexString(value, Math.log256(value) + 1);
        }
    }

    /**
     * @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] = _SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }

    /**
     * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.
     */
    function toHexString(address addr) internal pure returns (string memory) {
        return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
    }
}

// SPDX-License-Identifier: GPL-3.0

pragma solidity >=0.5.0;

/// @title Pool state that never changes
/// @notice These parameters are fixed for a pool forever, i.e., the methods will always return the same values
interface IUniswapV3Pool {
    /// @notice The first of the two tokens of the pool, sorted by address
    /// @return The token contract address
    function token0() external view returns (address);

    /// @notice The second of the two tokens of the pool, sorted by address
    /// @return The token contract address
    function token1() external view returns (address);

    /// @notice The pool's fee in hundredths of a bip, i.e. 1e-6
    /// @return The fee
    function fee() external view returns (uint24);
}

// SPDX-License-Identifier: GPL-3.0

pragma solidity ^0.8.17;

/// @title ICore
/// @author Angle Labs, Inc.
/// @notice Interface for the `Core` contracts of smart contract modules used in Angle Labs contracts
interface ICore {
    /// @notice Checks whether an address is governor
    /// @param admin Address to check
    /// @return Whether the address has the `GOVERNOR_ROLE` or not
    function isGovernor(address admin) external view returns (bool);

    /// @notice Checks whether an address is a governor or a guardian of a module
    /// @param admin Address to check
    /// @return Whether the address has the `GUARDIAN_ROLE` or not
    /// @dev Governance should make sure when adding a governor to also give this governor the guardian
    /// role by calling the `addGovernor` function
    function isGovernorOrGuardian(address admin) external view returns (bool);
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.17;

struct CampaignParameters {
    // POPULATED ONCE CREATED

    // ID of the campaign. This can be left as a null bytes32 when creating campaigns
    // on Merkl.
    bytes32 campaignId;
    // CHOSEN BY CAMPAIGN CREATOR

    // Address of the campaign creator, if marked as address(0), it will be overriden with the
    // address of the `msg.sender` creating the campaign
    address creator;
    // Address of the token used as a reward
    address rewardToken;
    // Amount of `rewardToken` to distribute across all the epochs
    // Amount distributed per epoch is `amount/numEpoch`
    uint256 amount;
    // Type of campaign
    uint32 campaignType;
    // Timestamp at which the campaign should start
    uint32 startTimestamp;
    // Duration of the campaign in seconds. Has to be a multiple of EPOCH = 3600
    uint32 duration;
    // Extra data to pass to specify the campaign
    bytes campaignData;
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.17;

struct DistributionParameters {
    // ID of the reward (populated once created). This can be left as a null bytes32 when creating distributions
    // on Merkl.
    bytes32 rewardId;
    // Address of the UniswapV3 pool that needs to be incentivized
    address uniV3Pool;
    // Address of the reward token for the incentives
    address rewardToken;
    // Amount of `rewardToken` to distribute across all the epochs
    // Amount distributed per epoch is `amount/numEpoch`
    uint256 amount;
    // List of all position wrappers to consider or not for this contract. Some wrappers like Gamma or Arrakis
    // are automatically detected and so there is no need to specify them here. Check out the docs to find out
    // which need to be specified and which are not automatically detected.
    address[] positionWrappers;
    // Type (blacklist==3, whitelist==0, ...) encoded as a `uint32` for each wrapper in the list above. Mapping between
    // wrapper types and their corresponding `uint32` value can be found in Angle Docs
    uint32[] wrapperTypes;
    // In the incentivization formula, how much of the fees should go to holders of token0
    // in base 10**4
    uint32 propToken0;
    // Proportion for holding token1 (in base 10**4)
    uint32 propToken1;
    // Proportion for providing a useful liquidity (in base 10**4) that generates fees
    uint32 propFees;
    // Timestamp at which the incentivization should start. This is in the same units as `block.timestamp`.
    uint32 epochStart;
    // Amount of epochs for which incentivization should last. Epochs are expressed in hours here, so for a
    // campaign of 1 week `numEpoch` should for instance be 168.
    uint32 numEpoch;
    // Whether out of range liquidity should still be incentivized or not
    // This should be equal to 1 if out of range liquidity should still be incentivized
    // and 0 otherwise.
    uint32 isOutOfRangeIncentivized;
    // How much more addresses with a maximum boost can get with respect to addresses
    // which do not have a boost (in base 4). In the case of Curve where addresses get 2.5x more
    // this would be 25000.
    uint32 boostedReward;
    // Address of the token which dictates who gets boosted rewards or not. This is optional
    // and if the zero address is given no boost will be taken into account. In the case of Curve, this address
    // would for instance be the veBoostProxy address, or in other cases the veToken address.
    address boostingAddress;
    // Additional data passed when distributing rewards. This parameter may be used in case
    // the reward distribution script needs to look into other parameters beyond the ones above.
    // In most cases, when creating a campaign on Merkl, you can leave this as an empty bytes.
    bytes additionalData;
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.17;

struct RewardTokenAmounts {
    address token;
    uint256 minimumAmountPerEpoch;
}

// SPDX-License-Identifier: GPL-3.0

pragma solidity ^0.8.17;

error CampaignDoesNotExist();
error CampaignAlreadyExists();
error CampaignDurationBelowHour();
error CampaignRewardTokenNotWhitelisted();
error CampaignRewardTooLow();
error CampaignSouldStartInFuture();
error InvalidDispute();
error InvalidLengths();
error InvalidParam();
error InvalidParams();
error InvalidProof();
error InvalidUninitializedRoot();
error InvalidReward();
error InvalidSignature();
error NoDispute();
error NotGovernor();
error NotGovernorOrGuardian();
error NotSigned();
error NotTrusted();
error NotWhitelisted();
error UnresolvedDispute();
error ZeroAddress();

// SPDX-License-Identifier: GPL-3.0

/*
                  *                                                  █                              
                *****                                               ▓▓▓                             
                  *                                               ▓▓▓▓▓▓▓                         
                                   *            ///.           ▓▓▓▓▓▓▓▓▓▓▓▓▓                       
                                 *****        ////////            ▓▓▓▓▓▓▓                          
                                   *       /////////////            ▓▓▓                             
                     ▓▓                  //////////////////          █         ▓▓                   
                   ▓▓  ▓▓             ///////////////////////                ▓▓   ▓▓                
                ▓▓       ▓▓        ////////////////////////////           ▓▓        ▓▓              
              ▓▓            ▓▓    /////////▓▓▓///////▓▓▓/////////       ▓▓             ▓▓            
           ▓▓                 ,////////////////////////////////////// ▓▓                 ▓▓         
        ▓▓                  //////////////////////////////////////////                     ▓▓      
      ▓▓                  //////////////////////▓▓▓▓/////////////////////                          
                       ,////////////////////////////////////////////////////                        
                    .//////////////////////////////////////////////////////////                     
                     .//////////////////////////██.,//////////////////////////█                     
                       .//////////////////////████..,./////////////////////██                       
                        ...////////////////███████.....,.////////////////███                        
                          ,.,////////////████████ ........,///////////████                          
                            .,.,//////█████████      ,.......///////████                            
                               ,..//████████           ........./████                               
                                 ..,██████                .....,███                                 
                                    .██                     ,.,█                                    
                                                                                                    
                                                                                                    
                                                                                                    
               ▓▓            ▓▓▓▓▓▓▓▓▓▓       ▓▓▓▓▓▓▓▓▓▓        ▓▓               ▓▓▓▓▓▓▓▓▓▓          
             ▓▓▓▓▓▓          ▓▓▓    ▓▓▓       ▓▓▓               ▓▓               ▓▓   ▓▓▓▓         
           ▓▓▓    ▓▓▓        ▓▓▓    ▓▓▓       ▓▓▓    ▓▓▓        ▓▓               ▓▓▓▓▓             
          ▓▓▓        ▓▓      ▓▓▓    ▓▓▓       ▓▓▓▓▓▓▓▓▓▓        ▓▓▓▓▓▓▓▓▓▓       ▓▓▓▓▓▓▓▓▓▓          
*/

pragma solidity ^0.8.17;

import { UUPSUpgradeable } from "@openzeppelin/contracts-upgradeable/proxy/utils/UUPSUpgradeable.sol";

import { ICore } from "../interfaces/ICore.sol";
import "../utils/Errors.sol";

/// @title UUPSHelper
/// @notice Helper contract for UUPSUpgradeable contracts where the upgradeability is controlled by a specific address
/// @author Angle Labs., Inc
/// @dev The 0 address check in the modifier allows the use of these modifiers during initialization
abstract contract UUPSHelper is UUPSUpgradeable {
    modifier onlyGuardianUpgrader(ICore _core) {
        if (address(_core) != address(0) && !_core.isGovernorOrGuardian(msg.sender)) revert NotGovernorOrGuardian();
        _;
    }

    modifier onlyGovernorUpgrader(ICore _core) {
        if (address(_core) != address(0) && !_core.isGovernor(msg.sender)) revert NotGovernor();
        _;
    }

    constructor() initializer {}
}

{
  "optimizer": {
    "enabled": true,
    "runs": 1
  },
  "viaIR": false,
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

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CampaignParameters","name":"campaign","type":"tuple"}],"name":"NewCampaign","type":"event"},{"anonymous":false,"inputs":[{"components":[{"internalType":"bytes32","name":"rewardId","type":"bytes32"},{"internalType":"address","name":"uniV3Pool","type":"address"},{"internalType":"address","name":"rewardToken","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address[]","name":"positionWrappers","type":"address[]"},{"internalType":"uint32[]","name":"wrapperTypes","type":"uint32[]"},{"internalType":"uint32","name":"propToken0","type":"uint32"},{"internalType":"uint32","name":"propToken1","type":"uint32"},{"internalType":"uint32","name":"propFees","type":"uint32"},{"internalType":"uint32","name":"epochStart","type":"uint32"},{"internalType":"uint32","name":"numEpoch","type":"uint32"},{"internalType":"uint32","name":"isOutOfRangeIncentivized","type":"uint32"},{"internalType":"uint32","name":"boostedReward","type":"uint32"},{"internalType":"address","name":"boostingAddress","type":"address"},{"internalType":"bytes","name":"additionalData","type":"bytes"}],"indexed":false,"internalType":"struct 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CampaignParameters","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"bytes32","name":"campaignId","type":"bytes32"},{"internalType":"address","name":"creator","type":"address"},{"internalType":"address","name":"rewardToken","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint32","name":"campaignType","type":"uint32"},{"internalType":"uint32","name":"startTimestamp","type":"uint32"},{"internalType":"uint32","name":"duration","type":"uint32"},{"internalType":"bytes","name":"campaignData","type":"bytes"}],"internalType":"struct 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CampaignParameters","name":"newCampaign","type":"tuple"}],"name":"createCampaign","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"bytes32","name":"campaignId","type":"bytes32"},{"internalType":"address","name":"creator","type":"address"},{"internalType":"address","name":"rewardToken","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint32","name":"campaignType","type":"uint32"},{"internalType":"uint32","name":"startTimestamp","type":"uint32"},{"internalType":"uint32","name":"duration","type":"uint32"},{"internalType":"bytes","name":"campaignData","type":"bytes"}],"internalType":"struct CampaignParameters[]","name":"campaigns","type":"tuple[]"}],"name":"createCampaigns","outputs":[{"internalType":"bytes32[]","name":"","type":"bytes32[]"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"bytes32","name":"rewardId","type":"bytes32"},{"internalType":"address","name":"uniV3Pool","type":"address"},{"internalType":"address","name":"rewardToken","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address[]","name":"positionWrappers","type":"address[]"},{"internalType":"uint32[]","name":"wrapperTypes","type":"uint32[]"},{"internalType":"uint32","name":"propToken0","type":"uint32"},{"internalType":"uint32","name":"propToken1","type":"uint32"},{"internalType":"uint32","name":"propFees","type":"uint32"},{"internalType":"uint32","name":"epochStart","type":"uint32"},{"internalType":"uint32","name":"numEpoch","type":"uint32"},{"internalType":"uint32","name":"isOutOfRangeIncentivized","type":"uint32"},{"internalType":"uint32","name":"boostedReward","type":"uint32"},{"internalType":"address","name":"boostingAddress","type":"address"},{"internalType":"bytes","name":"additionalData","type":"bytes"}],"internalType":"struct DistributionParameters","name":"newDistribution","type":"tuple"}],"name":"createDistribution","outputs":[{"internalType":"uint256","name":"distributionAmount","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"bytes32","name":"rewardId","type":"bytes32"},{"internalType":"address","name":"uniV3Pool","type":"address"},{"internalType":"address","name":"rewardToken","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address[]","name":"positionWrappers","type":"address[]"},{"internalType":"uint32[]","name":"wrapperTypes","type":"uint32[]"},{"internalType":"uint32","name":"propToken0","type":"uint32"},{"internalType":"uint32","name":"propToken1","type":"uint32"},{"internalType":"uint32","name":"propFees","type":"uint32"},{"internalType":"uint32","name":"epochStart","type":"uint32"},{"internalType":"uint32","name":"numEpoch","type":"uint32"},{"internalType":"uint32","name":"isOutOfRangeIncentivized","type":"uint32"},{"internalType":"uint32","name":"boostedReward","type":"uint32"},{"internalType":"address","name":"boostingAddress","type":"address"},{"internalType":"bytes","name":"additionalData","type":"bytes"}],"internalType":"struct DistributionParameters[]","name":"distributions","type":"tuple[]"}],"name":"createDistributions","outputs":[{"internalType":"uint256[]","name":"","type":"uint256[]"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"defaultFees","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"index","type":"uint256"}],"name":"distribution","outputs":[{"components":[{"internalType":"bytes32","name":"campaignId","type":"bytes32"},{"internalType":"address","name":"creator","type":"address"},{"internalType":"address","name":"rewardToken","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint32","name":"campaignType","type":"uint32"},{"internalType":"uint32","name":"startTimestamp","type":"uint32"},{"internalType":"uint32","name":"duration","type":"uint32"},{"internalType":"bytes","name":"campaignData","type":"bytes"}],"internalType":"struct CampaignParameters","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"distributionList","outputs":[{"internalType":"bytes32","name":"rewardId","type":"bytes32"},{"internalType":"address","name":"uniV3Pool","type":"address"},{"internalType":"address","name":"rewardToken","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint32","name":"propToken0","type":"uint32"},{"internalType":"uint32","name":"propToken1","type":"uint32"},{"internalType":"uint32","name":"propFees","type":"uint32"},{"internalType":"uint32","name":"epochStart","type":"uint32"},{"internalType":"uint32","name":"numEpoch","type":"uint32"},{"internalType":"uint32","name":"isOutOfRangeIncentivized","type":"uint32"},{"internalType":"uint32","name":"boostedReward","type":"uint32"},{"internalType":"address","name":"boostingAddress","type":"address"},{"internalType":"bytes","name":"additionalData","type":"bytes"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"distributor","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"feeRebate","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"feeRecipient","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint32","name":"start","type":"uint32"},{"internalType":"uint32","name":"end","type":"uint32"},{"internalType":"uint32","name":"skip","type":"uint32"},{"internalType":"uint32","name":"first","type":"uint32"}],"name":"getCampaignsBetween","outputs":[{"components":[{"internalType":"bytes32","name":"campaignId","type":"bytes32"},{"internalType":"address","name":"creator","type":"address"},{"internalType":"address","name":"rewardToken","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint32","name":"campaignType","type":"uint32"},{"internalType":"uint32","name":"startTimestamp","type":"uint32"},{"internalType":"uint32","name":"duration","type":"uint32"},{"internalType":"bytes","name":"campaignData","type":"bytes"}],"internalType":"struct CampaignParameters[]","name":"","type":"tuple[]"},{"internalType":"uint256","name":"lastIndexCampaign","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint32","name":"epochStart","type":"uint32"},{"internalType":"uint32","name":"epochEnd","type":"uint32"},{"internalType":"uint32","name":"skip","type":"uint32"},{"internalType":"uint32","name":"first","type":"uint32"}],"name":"getDistributionsBetweenEpochs","outputs":[{"components":[{"internalType":"bytes32","name":"rewardId","type":"bytes32"},{"internalType":"address","name":"uniV3Pool","type":"address"},{"internalType":"address","name":"rewardToken","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address[]","name":"positionWrappers","type":"address[]"},{"internalType":"uint32[]","name":"wrapperTypes","type":"uint32[]"},{"internalType":"uint32","name":"propToken0","type":"uint32"},{"internalType":"uint32","name":"propToken1","type":"uint32"},{"internalType":"uint32","name":"propFees","type":"uint32"},{"internalType":"uint32","name":"epochStart","type":"uint32"},{"internalType":"uint32","name":"numEpoch","type":"uint32"},{"internalType":"uint32","name":"isOutOfRangeIncentivized","type":"uint32"},{"internalType":"uint32","name":"boostedReward","type":"uint32"},{"internalType":"address","name":"boostingAddress","type":"address"},{"internalType":"bytes","name":"additionalData","type":"bytes"}],"internalType":"struct DistributionParameters[]","name":"","type":"tuple[]"},{"internalType":"uint256","name":"lastIndexDistribution","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getValidRewardTokens","outputs":[{"components":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"minimumAmountPerEpoch","type":"uint256"}],"internalType":"struct RewardTokenAmounts[]","name":"","type":"tuple[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint32","name":"skip","type":"uint32"},{"internalType":"uint32","name":"first","type":"uint32"}],"name":"getValidRewardTokens","outputs":[{"components":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"minimumAmountPerEpoch","type":"uint256"}],"internalType":"struct RewardTokenAmounts[]","name":"","type":"tuple[]"},{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"contract ICore","name":"_core","type":"address"},{"internalType":"address","name":"_distributor","type":"address"},{"internalType":"uint256","name":"_fees","type":"uint256"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"isWhitelistedToken","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"message","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"messageHash","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"proxiableUUID","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"contract IERC20[]","name":"tokens","type":"address[]"},{"internalType":"address","name":"to","type":"address"}],"name":"recoverFees","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"rewardTokenMinAmounts","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"rewardTokens","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint32","name":"campaignType","type":"uint32"},{"internalType":"uint256","name":"_fees","type":"uint256"}],"name":"setCampaignFees","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_feeRecipient","type":"address"}],"name":"setFeeRecipient","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_defaultFees","type":"uint256"}],"name":"setFees","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"_message","type":"string"}],"name":"setMessage","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_distributor","type":"address"}],"name":"setNewDistributor","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"tokens","type":"address[]"},{"internalType":"uint256[]","name":"amounts","type":"uint256[]"}],"name":"setRewardTokenMinAmounts","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"user","type":"address"},{"internalType":"uint256","name":"userFeeRebate","type":"uint256"}],"name":"setUserFeeRebate","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes","name":"signature","type":"bytes"}],"name":"sign","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"bytes32","name":"campaignId","type":"bytes32"},{"internalType":"address","name":"creator","type":"address"},{"internalType":"address","name":"rewardToken","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint32","name":"campaignType","type":"uint32"},{"internalType":"uint32","name":"startTimestamp","type":"uint32"},{"internalType":"uint32","name":"duration","type":"uint32"},{"internalType":"bytes","name":"campaignData","type":"bytes"}],"internalType":"struct CampaignParameters","name":"newCampaign","type":"tuple"},{"internalType":"bytes","name":"signature","type":"bytes"}],"name":"signAndCreateCampaign","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"user","type":"address"}],"name":"toggleSigningWhitelist","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"toggleTokenWhitelist","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newImplementation","type":"address"}],"name":"upgradeTo","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newImplementation","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"upgradeToAndCall","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"userSignatureWhitelist","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"userSignatures","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"}]

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