Contract Source Code (Solidity Standard Json-Input format)

IDE

• Blockscan IDE
• 🤖 Code ReaderBeta

More Options

• Similar
• Submit Audit
• Compare

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol";

import "./interfaces/IDividendsV2.sol";
import "./interfaces/IXZenTokenUsage.sol";

import "../../refs/CoreRef.sol";

/*
 * This contract is used to distribute dividends to users that allocated xZen here
 *
 * Dividends can be distributed in the form of one or more tokens
 * They are mainly managed to be received from the FeeManager contract, but other sources can be added (dev wallet for instance)
 *
 * The freshly received dividends are stored in a pending slot
 *
 * The content of this pending slot will be progressively transferred over time into a distribution slot
 * This distribution slot is the source of the dividends distribution to xZen allocators during the current cycle
 *
 * This transfer from the pending slot to the distribution slot is based on cycleDividendsPercent and CYCLE_PERIOD_SECONDS
 *
 */
contract DividendsV2 is CoreRef, ReentrancyGuard, IXZenTokenUsage, IDividendsV2 {
    using SafeMath for uint256;
    using SafeERC20 for IERC20;
    using EnumerableSet for EnumerableSet.AddressSet;

    struct UserInfo {
        uint256 pendingDividends;
        uint256 rewardDebt;
    }

    struct DividendsInfo {
        uint256 currentDistributionAmount; // total amount to distribute during the current cycle
        uint256 currentCycleDistributedAmount; // amount already distributed for the current cycle (times 1e2)
        uint256 pendingAmount; // total amount in the pending slot, not distributed yet
        uint256 distributedAmount; // total amount that has been distributed since initialization
        uint256 accDividendsPerShare; // accumulated dividends per share (times 1e18)
        uint256 lastUpdateTime; // last time the dividends distribution occurred
        uint256 cycleDividendsPercent; // fixed part of the pending dividends to assign to currentDistributionAmount on every cycle
        bool distributionDisabled; // deactivate a token distribution (for temporary dividends)
    }

    // actively distributed tokens
    EnumerableSet.AddressSet private _distributedTokens;
    uint256 public constant MAX_DISTRIBUTED_TOKENS = 10;

    // dividends info for every dividends token
    mapping(address => DividendsInfo) public dividendsInfo;
    mapping(address => mapping(address => UserInfo)) public users;

    address public immutable xZenToken; // xZenToken contract

    mapping(address => uint256) public usersAllocation; // User's xZen allocation
    uint256 public totalAllocation; // Contract's total xZen allocation

    uint256 public constant MIN_CYCLE_DIVIDENDS_PERCENT = 1; // 0.01%
    uint256 public constant DEFAULT_CYCLE_DIVIDENDS_PERCENT = 10000; // 100%
    uint256 public constant MAX_CYCLE_DIVIDENDS_PERCENT = 10000; // 100%
    // dividends will be added to the currentDistributionAmount on each new cycle
    uint256 internal _cycleDurationSeconds = 7 days;
    uint256 public currentCycleStartTime;

    constructor(address xZenToken_, uint256 startTime_, address _core) CoreRef(_core) {
        require(xZenToken_ != address(0), "zero address");
        xZenToken = xZenToken_;
        currentCycleStartTime = startTime_;
    }

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

    event UserUpdated(address indexed user, uint256 previousBalance, uint256 newBalance);
    event DividendsCollected(address indexed user, address indexed token, uint256 amount);
    event CycleDividendsPercentUpdated(address indexed token, uint256 previousValue, uint256 newValue);
    event DividendsAddedToPending(address indexed token, uint256 amount);
    event DistributedTokenDisabled(address indexed token);
    event DistributedTokenRemoved(address indexed token);
    event DistributedTokenEnabled(address indexed token);

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

    /**
     * @dev Checks if an index exists
     */
    modifier validateDistributedTokensIndex(uint256 index) {
        require(index < _distributedTokens.length(), "validateDistributedTokensIndex: index exists?");
        _;
    }

    /**
     * @dev Checks if token exists
     */
    modifier validateDistributedToken(address token) {
        require(_distributedTokens.contains(token), "validateDistributedTokens: token does not exists");
        _;
    }

    /**
     * @dev Checks if caller is the xZenToken contract
     */
    modifier xZenTokenOnly() {
        require(msg.sender == xZenToken, "xZenTokenOnly: caller should be XZenToken");
        _;
    }

    /*******************************************/
    /****************** VIEWS ******************/
    /*******************************************/

    function cycleDurationSeconds() external view returns (uint256) {
        return _cycleDurationSeconds;
    }

    /**
     * @dev Returns the number of dividends tokens
     */
    function distributedTokensLength() external view override returns (uint256) {
        return _distributedTokens.length();
    }

    /**
     * @dev Returns dividends token address from given index
     */
    function distributedToken(
        uint256 index
    ) external view override validateDistributedTokensIndex(index) returns (address) {
        return address(_distributedTokens.at(index));
    }

    /**
     * @dev Returns true if given token is a dividends token
     */
    function isDistributedToken(address token) external view override returns (bool) {
        return _distributedTokens.contains(token);
    }

    /**
     * @dev Returns time at which the next cycle will start
     */
    function nextCycleStartTime() public view returns (uint256) {
        return currentCycleStartTime.add(_cycleDurationSeconds);
    }

    /**
     * @dev Returns user's dividends pending amount for a given token
     */
    function pendingDividendsAmount(address token, address userAddress) external view returns (uint256) {
        if (totalAllocation == 0) {
            return 0;
        }

        DividendsInfo storage dividendsInfo_ = dividendsInfo[token];

        uint256 accDividendsPerShare = dividendsInfo_.accDividendsPerShare;
        uint256 lastUpdateTime = dividendsInfo_.lastUpdateTime;
        uint256 dividendAmountPerSecond_ = _dividendsAmountPerSecond(token);

        // check if the current cycle has changed since last update
        if (_currentBlockTimestamp() > nextCycleStartTime()) {
            // get remaining rewards from last cycle
            accDividendsPerShare = accDividendsPerShare.add(
                (nextCycleStartTime().sub(lastUpdateTime)).mul(dividendAmountPerSecond_).mul(1e16).div(totalAllocation)
            );
            lastUpdateTime = nextCycleStartTime();
            dividendAmountPerSecond_ = dividendsInfo_
                .pendingAmount
                .mul(dividendsInfo_.cycleDividendsPercent)
                .div(100)
                .div(_cycleDurationSeconds);
        }

        // get pending rewards from current cycle
        accDividendsPerShare = accDividendsPerShare.add(
            (_currentBlockTimestamp().sub(lastUpdateTime)).mul(dividendAmountPerSecond_).mul(1e16).div(totalAllocation)
        );

        return
            usersAllocation[userAddress]
                .mul(accDividendsPerShare)
                .div(1e18)
                .sub(users[token][userAddress].rewardDebt)
                .add(users[token][userAddress].pendingDividends);
    }

    /**************************************************/
    /****************** PUBLIC FUNCTIONS **************/
    /**************************************************/

    /**
     * @dev Updates the current cycle start time if previous cycle has ended
     */
    function updateCurrentCycleStartTime() public {
        uint256 nextCycleStartTime_ = nextCycleStartTime();

        if (_currentBlockTimestamp() >= nextCycleStartTime_) {
            currentCycleStartTime = nextCycleStartTime_;
        }
    }

    /**
     * @dev Updates dividends info for a given token
     */
    function updateDividendsInfo(address token) external validateDistributedToken(token) {
        _updateDividendsInfo(token);
    }

    /****************************************************************/
    /****************** EXTERNAL PUBLIC FUNCTIONS  ******************/
    /****************************************************************/

    /**
     * @dev Updates all dividendsInfo
     */
    function massUpdateDividendsInfo() external {
        uint256 length = _distributedTokens.length();
        for (uint256 index = 0; index < length; ++index) {
            _updateDividendsInfo(_distributedTokens.at(index));
        }
    }

    /**
     * @dev Harvests caller's pending dividends of a given token
     */
    function harvestDividends(address token) external nonReentrant {
        if (!_distributedTokens.contains(token)) {
            require(dividendsInfo[token].distributedAmount > 0, "harvestDividends: invalid token");
        }

        _harvestDividends(token);
    }

    /**
     * @dev Harvests all caller's pending dividends
     */
    function harvestAllDividends() external nonReentrant {
        uint256 length = _distributedTokens.length();
        for (uint256 index = 0; index < length; ++index) {
            _harvestDividends(_distributedTokens.at(index));
        }
    }

    /**
     * @dev Transfers the given amount of token from caller to pendingAmount
     *
     * Must only be called by a trustable address
     */
    function addDividendsToPending(address token, uint256 amount) external override nonReentrant {
        uint256 prevTokenBalance = IERC20(token).balanceOf(address(this));
        DividendsInfo storage dividendsInfo_ = dividendsInfo[token];

        IERC20(token).safeTransferFrom(msg.sender, address(this), amount);

        // handle tokens with transfer tax
        uint256 receivedAmount = IERC20(token).balanceOf(address(this)).sub(prevTokenBalance);
        dividendsInfo_.pendingAmount = dividendsInfo_.pendingAmount.add(receivedAmount);

        emit DividendsAddedToPending(token, receivedAmount);
    }

    /**
     * @dev Emergency withdraw token's balance on the contract
     */
    function emergencyWithdraw(IERC20 token) public nonReentrant onlyGuardianOrGovernor {
        uint256 balance = token.balanceOf(address(this));
        require(balance > 0, "emergencyWithdraw: token balance is null");
        _safeTokenTransfer(token, msg.sender, balance);
    }

    /**
     * @dev Emergency withdraw all dividend tokens' balances on the contract
     */
    function emergencyWithdrawAll() external nonReentrant onlyGuardianOrGovernor {
        for (uint256 index = 0; index < _distributedTokens.length(); ++index) {
            emergencyWithdraw(IERC20(_distributedTokens.at(index)));
        }
    }

    /*****************************************************************/
    /****************** OWNABLE FUNCTIONS  ******************/
    /*****************************************************************/
    /**
     * Allocates "userAddress" user's "amount" of xZen to this dividends contract
     *
     * Can only be called by xZenToken contract, which is trusted to verify amounts
     * "data" is only here for compatibility reasons (IxZenTokenUsage)
     */
    function allocate(
        address userAddress,
        uint256 amount,
        bytes calldata /*data*/
    ) external override nonReentrant xZenTokenOnly {
        uint256 newUserAllocation = usersAllocation[userAddress].add(amount);
        uint256 newTotalAllocation = totalAllocation.add(amount);
        _updateUser(userAddress, newUserAllocation, newTotalAllocation);
    }

    /**
     * Deallocates "userAddress" user's "amount" of xZen allocation from this dividends contract
     *
     * Can only be called by xZenToken contract, which is trusted to verify amounts
     * "data" is only here for compatibility reasons (IxZenTokenUsage)
     */
    function deallocate(
        address userAddress,
        uint256 amount,
        bytes calldata /*data*/
    ) external override nonReentrant xZenTokenOnly {
        uint256 newUserAllocation = usersAllocation[userAddress].sub(amount);
        uint256 newTotalAllocation = totalAllocation.sub(amount);
        _updateUser(userAddress, newUserAllocation, newTotalAllocation);
    }

    /**
     * @dev Enables a given token to be distributed as dividends
     *
     * Effective from the next cycle
     */
    function enableDistributedToken(address token) external onlyGuardianOrGovernor {
        DividendsInfo storage dividendsInfo_ = dividendsInfo[token];
        require(
            dividendsInfo_.lastUpdateTime == 0 || dividendsInfo_.distributionDisabled,
            "enableDistributedToken: Already enabled dividends token"
        );
        require(
            _distributedTokens.length() < MAX_DISTRIBUTED_TOKENS,
            "enableDistributedToken: too many distributedTokens"
        );
        // initialize lastUpdateTime if never set before
        if (dividendsInfo_.lastUpdateTime == 0) {
            dividendsInfo_.lastUpdateTime = _currentBlockTimestamp();
        }
        // initialize cycleDividendsPercent to the minimum if never set before
        if (dividendsInfo_.cycleDividendsPercent == 0) {
            dividendsInfo_.cycleDividendsPercent = DEFAULT_CYCLE_DIVIDENDS_PERCENT;
        }
        dividendsInfo_.distributionDisabled = false;
        _distributedTokens.add(token);
        emit DistributedTokenEnabled(token);
    }

    /**
     * @dev Disables distribution of a given token as dividends
     *
     * Effective from the next cycle
     */
    function disableDistributedToken(address token) external onlyGuardianOrGovernor {
        DividendsInfo storage dividendsInfo_ = dividendsInfo[token];
        require(
            dividendsInfo_.lastUpdateTime > 0 && !dividendsInfo_.distributionDisabled,
            "disableDistributedToken: Already disabled dividends token"
        );
        dividendsInfo_.distributionDisabled = true;
        emit DistributedTokenDisabled(token);
    }

    /**
     * @dev Updates the percentage of pending dividends that will be distributed during the next cycle
     *
     * Must be a value between MIN_CYCLE_DIVIDENDS_PERCENT and MAX_CYCLE_DIVIDENDS_PERCENT
     */
    function updateCycleDividendsPercent(address token, uint256 percent) external onlyGuardianOrGovernor {
        require(percent <= MAX_CYCLE_DIVIDENDS_PERCENT, "updateCycleDividendsPercent: percent mustn't exceed maximum");
        require(percent >= MIN_CYCLE_DIVIDENDS_PERCENT, "updateCycleDividendsPercent: percent mustn't exceed minimum");
        DividendsInfo storage dividendsInfo_ = dividendsInfo[token];
        uint256 previousPercent = dividendsInfo_.cycleDividendsPercent;
        dividendsInfo_.cycleDividendsPercent = percent;
        emit CycleDividendsPercentUpdated(token, previousPercent, dividendsInfo_.cycleDividendsPercent);
    }

    /**
     * @dev remove an address from _distributedTokens
     *
     * Can only be valid for a disabled dividends token and if the distribution has ended
     */
    function removeTokenFromDistributedTokens(address tokenToRemove) external onlyGuardianOrGovernor {
        DividendsInfo storage _dividendsInfo = dividendsInfo[tokenToRemove];
        require(
            _dividendsInfo.distributionDisabled && _dividendsInfo.currentDistributionAmount == 0,
            "removeTokenFromDistributedTokens: cannot be removed"
        );
        _distributedTokens.remove(tokenToRemove);
        emit DistributedTokenRemoved(tokenToRemove);
    }

    /********************************************************/
    /****************** INTERNAL FUNCTIONS ******************/
    /********************************************************/

    /**
     * @dev Returns the amount of dividends token distributed every second (times 1e2)
     */
    function _dividendsAmountPerSecond(address token) internal view returns (uint256) {
        if (!_distributedTokens.contains(token)) return 0;
        return dividendsInfo[token].currentDistributionAmount.mul(1e2).div(_cycleDurationSeconds);
    }

    /**
     * @dev Updates every user's rewards allocation for each distributed token
     */
    function _updateDividendsInfo(address token) internal {
        uint256 currentBlockTimestamp = _currentBlockTimestamp();
        DividendsInfo storage dividendsInfo_ = dividendsInfo[token];

        updateCurrentCycleStartTime();

        uint256 lastUpdateTime = dividendsInfo_.lastUpdateTime;
        uint256 accDividendsPerShare = dividendsInfo_.accDividendsPerShare;
        if (currentBlockTimestamp <= lastUpdateTime) {
            return;
        }

        // if no xZen is allocated or initial distribution has not started yet
        if (totalAllocation == 0 || currentBlockTimestamp < currentCycleStartTime) {
            dividendsInfo_.lastUpdateTime = currentBlockTimestamp;
            return;
        }

        uint256 currentDistributionAmount = dividendsInfo_.currentDistributionAmount; // gas saving
        uint256 currentCycleDistributedAmount = dividendsInfo_.currentCycleDistributedAmount; // gas saving

        // check if the current cycle has changed since last update
        if (lastUpdateTime < currentCycleStartTime) {
            // update accDividendPerShare for the end of the previous cycle
            accDividendsPerShare = accDividendsPerShare.add(
                (currentDistributionAmount.mul(1e2).sub(currentCycleDistributedAmount)).mul(1e16).div(totalAllocation)
            );

            // check if distribution is enabled
            if (!dividendsInfo_.distributionDisabled) {
                // transfer the token's cycleDividendsPercent part from the pending slot to the distribution slot
                dividendsInfo_.distributedAmount = dividendsInfo_.distributedAmount.add(currentDistributionAmount);

                uint256 pendingAmount = dividendsInfo_.pendingAmount;
                currentDistributionAmount = pendingAmount.mul(dividendsInfo_.cycleDividendsPercent).div(10000);
                dividendsInfo_.currentDistributionAmount = currentDistributionAmount;
                dividendsInfo_.pendingAmount = pendingAmount.sub(currentDistributionAmount);
            } else {
                // stop the token's distribution on next cycle
                dividendsInfo_.distributedAmount = dividendsInfo_.distributedAmount.add(currentDistributionAmount);
                currentDistributionAmount = 0;
                dividendsInfo_.currentDistributionAmount = 0;
            }

            currentCycleDistributedAmount = 0;
            lastUpdateTime = currentCycleStartTime;
        }

        uint256 toDistribute = (currentBlockTimestamp.sub(lastUpdateTime)).mul(_dividendsAmountPerSecond(token));
        // ensure that we can't distribute more than currentDistributionAmount (for instance w/ a > 24h service interruption)
        if (currentCycleDistributedAmount.add(toDistribute) > currentDistributionAmount.mul(1e2)) {
            toDistribute = currentDistributionAmount.mul(1e2).sub(currentCycleDistributedAmount);
        }

        dividendsInfo_.currentCycleDistributedAmount = currentCycleDistributedAmount.add(toDistribute);
        dividendsInfo_.accDividendsPerShare = accDividendsPerShare.add(toDistribute.mul(1e16).div(totalAllocation));
        dividendsInfo_.lastUpdateTime = currentBlockTimestamp;
    }

    /**
     * Updates "userAddress" user's and total allocations for each distributed token
     */
    function _updateUser(address userAddress, uint256 newUserAllocation, uint256 newTotalAllocation) internal {
        uint256 previousUserAllocation = usersAllocation[userAddress];

        // for each distributedToken
        uint256 length = _distributedTokens.length();
        for (uint256 index = 0; index < length; ++index) {
            address token = _distributedTokens.at(index);
            _updateDividendsInfo(token);

            UserInfo storage user = users[token][userAddress];
            uint256 accDividendsPerShare = dividendsInfo[token].accDividendsPerShare;

            uint256 pending = previousUserAllocation.mul(accDividendsPerShare).div(1e18).sub(user.rewardDebt);
            user.pendingDividends = user.pendingDividends.add(pending);
            user.rewardDebt = newUserAllocation.mul(accDividendsPerShare).div(1e18);
        }

        usersAllocation[userAddress] = newUserAllocation;
        totalAllocation = newTotalAllocation;

        emit UserUpdated(userAddress, previousUserAllocation, newUserAllocation);
    }

    /**
     * @dev Harvests msg.sender's pending dividends of a given token
     */
    function _harvestDividends(address token) internal {
        _updateDividendsInfo(token);

        UserInfo storage user = users[token][msg.sender];
        uint256 accDividendsPerShare = dividendsInfo[token].accDividendsPerShare;

        uint256 userXZenAllocation = usersAllocation[msg.sender];
        uint256 pending = user.pendingDividends.add(
            userXZenAllocation.mul(accDividendsPerShare).div(1e18).sub(user.rewardDebt)
        );

        user.pendingDividends = 0;
        user.rewardDebt = userXZenAllocation.mul(accDividendsPerShare).div(1e18);

        _safeTokenTransfer(IERC20(token), msg.sender, pending);
        emit DividendsCollected(msg.sender, token, pending);
    }

    /**
     * @dev Safe token transfer function, in case rounding error causes pool to not have enough tokens
     */
    function _safeTokenTransfer(IERC20 token, address to, uint256 amount) internal {
        if (amount > 0) {
            uint256 tokenBal = token.balanceOf(address(this));
            if (amount > tokenBal) {
                token.safeTransfer(to, tokenBal);
            } else {
                token.safeTransfer(to, amount);
            }
        }
    }

    /**
     * @dev Utility function to get the current block timestamp
     */
    function _currentBlockTimestamp() internal view virtual returns (uint256) {
        /* solhint-disable not-rely-on-time */
        return block.timestamp;
    }
}

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

pragma solidity ^0.8.0;

import "./IAccessControl.sol";
import "../utils/Context.sol";
import "../utils/Strings.sol";
import "../utils/introspection/ERC165.sol";

/**
 * @dev Contract module that allows children to implement role-based access
 * control mechanisms. This is a lightweight version that doesn't allow enumerating role
 * members except through off-chain means by accessing the contract event logs. Some
 * applications may benefit from on-chain enumerability, for those cases see
 * {AccessControlEnumerable}.
 *
 * Roles are referred to by their `bytes32` identifier. These should be exposed
 * in the external API and be unique. The best way to achieve this is by
 * using `public constant` hash digests:
 *
 * ```solidity
 * bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
 * ```
 *
 * Roles can be used to represent a set of permissions. To restrict access to a
 * function call, use {hasRole}:
 *
 * ```solidity
 * function foo() public {
 *     require(hasRole(MY_ROLE, msg.sender));
 *     ...
 * }
 * ```
 *
 * Roles can be granted and revoked dynamically via the {grantRole} and
 * {revokeRole} functions. Each role has an associated admin role, and only
 * accounts that have a role's admin role can call {grantRole} and {revokeRole}.
 *
 * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
 * that only accounts with this role will be able to grant or revoke other
 * roles. More complex role relationships can be created by using
 * {_setRoleAdmin}.
 *
 * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
 * grant and revoke this role. Extra precautions should be taken to secure
 * accounts that have been granted it. We recommend using {AccessControlDefaultAdminRules}
 * to enforce additional security measures for this role.
 */
abstract contract AccessControl is Context, IAccessControl, ERC165 {
    struct RoleData {
        mapping(address => bool) members;
        bytes32 adminRole;
    }

    mapping(bytes32 => RoleData) private _roles;

    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;

    /**
     * @dev Modifier that checks that an account has a specific role. Reverts
     * with a standardized message including the required role.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     *
     * _Available since v4.1._
     */
    modifier onlyRole(bytes32 role) {
        _checkRole(role);
        _;
    }

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

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) public view virtual override returns (bool) {
        return _roles[role].members[account];
    }

    /**
     * @dev Revert with a standard message if `_msgSender()` is missing `role`.
     * Overriding this function changes the behavior of the {onlyRole} modifier.
     *
     * Format of the revert message is described in {_checkRole}.
     *
     * _Available since v4.6._
     */
    function _checkRole(bytes32 role) internal view virtual {
        _checkRole(role, _msgSender());
    }

    /**
     * @dev Revert with a standard message if `account` is missing `role`.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     */
    function _checkRole(bytes32 role, address account) internal view virtual {
        if (!hasRole(role, account)) {
            revert(
                string(
                    abi.encodePacked(
                        "AccessControl: account ",
                        Strings.toHexString(account),
                        " is missing role ",
                        Strings.toHexString(uint256(role), 32)
                    )
                )
            );
        }
    }

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) {
        return _roles[role].adminRole;
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleGranted} event.
     */
    function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _grantRole(role, account);
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleRevoked} event.
     */
    function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _revokeRole(role, account);
    }

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been revoked `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     *
     * May emit a {RoleRevoked} event.
     */
    function renounceRole(bytes32 role, address account) public virtual override {
        require(account == _msgSender(), "AccessControl: can only renounce roles for self");

        _revokeRole(role, account);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event. Note that unlike {grantRole}, this function doesn't perform any
     * checks on the calling account.
     *
     * May emit a {RoleGranted} event.
     *
     * [WARNING]
     * ====
     * This function should only be called from the constructor when setting
     * up the initial roles for the system.
     *
     * Using this function in any other way is effectively circumventing the admin
     * system imposed by {AccessControl}.
     * ====
     *
     * NOTE: This function is deprecated in favor of {_grantRole}.
     */
    function _setupRole(bytes32 role, address account) internal virtual {
        _grantRole(role, account);
    }

    /**
     * @dev Sets `adminRole` as ``role``'s admin role.
     *
     * Emits a {RoleAdminChanged} event.
     */
    function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
        bytes32 previousAdminRole = getRoleAdmin(role);
        _roles[role].adminRole = adminRole;
        emit RoleAdminChanged(role, previousAdminRole, adminRole);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleGranted} event.
     */
    function _grantRole(bytes32 role, address account) internal virtual {
        if (!hasRole(role, account)) {
            _roles[role].members[account] = true;
            emit RoleGranted(role, account, _msgSender());
        }
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleRevoked} event.
     */
    function _revokeRole(bytes32 role, address account) internal virtual {
        if (hasRole(role, account)) {
            _roles[role].members[account] = false;
            emit RoleRevoked(role, account, _msgSender());
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol)

pragma solidity ^0.8.0;

/**
 * @dev External interface of AccessControl declared to support ERC165 detection.
 */
interface IAccessControl {
    /**
     * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
     *
     * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
     * {RoleAdminChanged} not being emitted signaling this.
     *
     * _Available since v3.1._
     */
    event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);

    /**
     * @dev Emitted when `account` is granted `role`.
     *
     * `sender` is the account that originated the contract call, an admin role
     * bearer except when using {AccessControl-_setupRole}.
     */
    event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Emitted when `account` is revoked `role`.
     *
     * `sender` is the account that originated the contract call:
     *   - if using `revokeRole`, it is the admin role bearer
     *   - if using `renounceRole`, it is the role bearer (i.e. `account`)
     */
    event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) external view returns (bool);

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {AccessControl-_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) external view returns (bytes32);

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function grantRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function revokeRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been granted `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     */
    function renounceRole(bytes32 role, address account) external;
}

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

pragma solidity ^0.8.0;

import "../utils/Context.sol";

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

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

    bool private _paused;

    /**
     * @dev Initializes the contract in unpaused state.
     */
    constructor() {
        _paused = false;
    }

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

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

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

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

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

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

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

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

pragma solidity ^0.8.0;

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

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

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.4) (token/ERC20/extensions/IERC20Permit.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 *
 * ==== Security Considerations
 *
 * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature
 * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be
 * considered as an intention to spend the allowance in any specific way. The second is that because permits have
 * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should
 * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be
 * generally recommended is:
 *
 * ```solidity
 * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {
 *     try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}
 *     doThing(..., value);
 * }
 *
 * function doThing(..., uint256 value) public {
 *     token.safeTransferFrom(msg.sender, address(this), value);
 *     ...
 * }
 * ```
 *
 * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of
 * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also
 * {SafeERC20-safeTransferFrom}).
 *
 * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so
 * contracts should have entry points that don't rely on permit.
 */
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].
     *
     * CAUTION: See Security Considerations above.
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

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

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

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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

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

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

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     *
     * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false
        // and not revert is the subcall reverts.

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

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

pragma solidity ^0.8.1;

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

        return account.code.length > 0;
    }

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

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

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

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

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

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.4) (utils/Context.sol)

pragma solidity ^0.8.0;

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

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

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

import "./IERC165.sol";

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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) {
                // Solidity will revert if denominator == 0, unlike the div opcode on its own.
                // The surrounding unchecked block does not change this fact.
                // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            require(denominator > prod1, "Math: mulDiv overflow");

            ///////////////////////////////////////////////
            // 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 256, 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 << 3) < value ? 1 : 0);
        }
    }
}

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

pragma solidity ^0.8.0;

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

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
 * now has built in overflow checking.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}

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

pragma solidity ^0.8.0;

/**
 * @dev Standard signed math utilities missing in the Solidity language.
 */
library SignedMath {
    /**
     * @dev Returns the largest of two signed numbers.
     */
    function max(int256 a, int256 b) internal pure returns (int256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two signed numbers.
     */
    function min(int256 a, int256 b) internal pure returns (int256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two signed numbers without overflow.
     * The result is rounded towards zero.
     */
    function average(int256 a, int256 b) internal pure returns (int256) {
        // Formula from the book "Hacker's Delight"
        int256 x = (a & b) + ((a ^ b) >> 1);
        return x + (int256(uint256(x) >> 255) & (a ^ b));
    }

    /**
     * @dev Returns the absolute unsigned value of a signed value.
     */
    function abs(int256 n) internal pure returns (uint256) {
        unchecked {
            // must be unchecked in order to support `n = type(int256).min`
            return uint256(n >= 0 ? n : -n);
        }
    }
}

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

pragma solidity ^0.8.0;

import "./math/Math.sol";
import "./math/SignedMath.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 `int256` to its ASCII `string` decimal representation.
     */
    function toString(int256 value) internal pure returns (string memory) {
        return string(abi.encodePacked(value < 0 ? "-" : "", toString(SignedMath.abs(value))));
    }

    /**
     * @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);
    }

    /**
     * @dev Returns true if the two strings are equal.
     */
    function equal(string memory a, string memory b) internal pure returns (bool) {
        return keccak256(bytes(a)) == keccak256(bytes(b));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/structs/EnumerableSet.sol)
// This file was procedurally generated from scripts/generate/templates/EnumerableSet.js.

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

            return true;
        } else {
            return false;
        }
    }

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

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

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

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

    // Bytes32Set

    struct Bytes32Set {
        Set _inner;
    }

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

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

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

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

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

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

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

        return result;
    }

    // AddressSet

    struct AddressSet {
        Set _inner;
    }

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

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

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

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

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

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

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

        return result;
    }

    // UintSet

    struct UintSet {
        Set _inner;
    }

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

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

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

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

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

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

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

        return result;
    }
}

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.4;

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

/// @title CHI stablecoin interface
interface IChi is IERC20 {
    // ----------- Events -----------

    event Minting(address indexed _to, address indexed _minter, uint256 _amount);

    event Burning(address indexed _to, address indexed _burner, uint256 _amount);

    // ----------- State changing api -----------

    function burn(uint256 amount) external;

    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    // ----------- Burner only state changing api -----------

    function burnFrom(address account, uint256 amount) external;

    // ----------- Minter only state changing api -----------

    function mint(address account, uint256 amount) external;

}

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.4;

import "./IPermissions.sol";
import "../chi/IChi.sol";

/// @title Core Interface
interface ICore is IPermissions {
    // ----------- Events -----------

    event ChiUpdate(address indexed _chi);
    event ZenUpdate(address indexed _zen);
    event ZenAllocation(address indexed _to, uint256 _amount);

    // ----------- Governor only state changing api -----------

    function init() external;

    // ----------- Governor only state changing api -----------

    function setChi(address token) external;

    function setZen(address token) external;

    function allocateZen(address to, uint256 amount) external;

    // ----------- Getters -----------

    function chi() external view returns (IChi);

    function zen() external view returns (IERC20);
}

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.4;

import "@openzeppelin/contracts/access/AccessControl.sol";
import "./IPermissionsRead.sol";

/// @title Permissions interface

interface IPermissions is IAccessControl, IPermissionsRead {
    // ----------- Governor only state changing api -----------

    function createRole(bytes32 role, bytes32 adminRole) external;

    function grantMinter(address minter) external;

    function grantPCVController(address pcvController) external;

    function grantGovernor(address governor) external;

    function grantGuardian(address guardian) external;

    function revokeMinter(address minter) external;

    function revokePCVController(address pcvController) external;

    function revokeGovernor(address governor) external;

    function revokeGuardian(address guardian) external;

    // ----------- Revoker only state changing api -----------

    function revokeOverride(bytes32 role, address account) external;

    // ----------- Getters -----------

    function GUARDIAN_ROLE() external view returns (bytes32);

    function GOVERN_ROLE() external view returns (bytes32);

    function MINTER_ROLE() external view returns (bytes32);

    function PCV_CONTROLLER_ROLE() external view returns (bytes32);
}

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.4;

/// @title Permissions Read interface
interface IPermissionsRead {
    // ----------- Getters -----------

    function isMinter(address _address) external view returns (bool);

    function isGovernor(address _address) external view returns (bool);

    function isGuardian(address _address) external view returns (bool);

    function isPCVController(address _address) external view returns (bool);
}

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.4;

import "./ICoreRef.sol";
import "@openzeppelin/contracts/security/Pausable.sol";

/// @title A Reference to Core
/// @notice defines some modifiers and utilities around interacting with Core
abstract contract CoreRef is ICoreRef, Pausable {
    ICore private immutable _core;
    IChi private immutable _chi;
    IERC20 private immutable _zen;

    constructor(address coreAddress) {
        _core = ICore(coreAddress);

        _chi = ICore(coreAddress).chi();
        _zen = ICore(coreAddress).zen();
    }

    function _initialize(address) internal {} // no-op for backward compatibility

    modifier ifMinterSelf() {
        if (_core.isMinter(address(this))) {
            _;
        }
    }

    modifier onlyMinter() {
        require(_core.isMinter(msg.sender), "CoreRef: Caller is not a minter");
        _;
    }

    modifier onlyPCVController() {
        require(_core.isPCVController(msg.sender), "CoreRef: Caller is not a PCV controller");
        _;
    }

    modifier onlyGovernor() {
        require(_core.isGovernor(msg.sender), "CoreRef: Caller is not a governor");
        _;
    }

    modifier onlyGuardianOrGovernor() {
        require(
            _core.isGovernor(msg.sender) || _core.isGuardian(msg.sender),
            "CoreRef: Caller is not a guardian or governor"
        );
        _;
    }

    modifier onlyGuardianOrPCVController() {
        require(
            _core.isPCVController(msg.sender) || _core.isGuardian(msg.sender),
            "CoreRef: Caller is not a PCV controller or governor"
        );
        _;
    }

    // Named onlyZenRole to prevent collision with OZ onlyRole modifier
    modifier onlyZenRole(bytes32 role) {
        require(_core.hasRole(role, msg.sender), "UNAUTHORIZED");
        _;
    }

    // Modifiers to allow any combination of roles
    modifier hasAnyOfTwoRoles(bytes32 role1, bytes32 role2) {
        require(_core.hasRole(role1, msg.sender) || _core.hasRole(role2, msg.sender), "UNAUTHORIZED");
        _;
    }

    modifier hasAnyOfThreeRoles(
        bytes32 role1,
        bytes32 role2,
        bytes32 role3
    ) {
        require(
            _core.hasRole(role1, msg.sender) || _core.hasRole(role2, msg.sender) || _core.hasRole(role3, msg.sender),
            "UNAUTHORIZED"
        );
        _;
    }

    modifier hasAnyOfFourRoles(
        bytes32 role1,
        bytes32 role2,
        bytes32 role3,
        bytes32 role4
    ) {
        require(
            _core.hasRole(role1, msg.sender) ||
                _core.hasRole(role2, msg.sender) ||
                _core.hasRole(role3, msg.sender) ||
                _core.hasRole(role4, msg.sender),
            "UNAUTHORIZED"
        );
        _;
    }

    modifier hasAnyOfFiveRoles(
        bytes32 role1,
        bytes32 role2,
        bytes32 role3,
        bytes32 role4,
        bytes32 role5
    ) {
        require(
            _core.hasRole(role1, msg.sender) ||
                _core.hasRole(role2, msg.sender) ||
                _core.hasRole(role3, msg.sender) ||
                _core.hasRole(role4, msg.sender) ||
                _core.hasRole(role5, msg.sender),
            "UNAUTHORIZED"
        );
        _;
    }

    modifier hasAnyOfSixRoles(
        bytes32 role1,
        bytes32 role2,
        bytes32 role3,
        bytes32 role4,
        bytes32 role5,
        bytes32 role6
    ) {
        require(
            _core.hasRole(role1, msg.sender) ||
                _core.hasRole(role2, msg.sender) ||
                _core.hasRole(role3, msg.sender) ||
                _core.hasRole(role4, msg.sender) ||
                _core.hasRole(role5, msg.sender) ||
                _core.hasRole(role6, msg.sender),
            "UNAUTHORIZED"
        );
        _;
    }

    modifier onlyChi() {
        require(msg.sender == address(_chi), "CoreRef: Caller is not CHI");
        _;
    }

    /// @notice set pausable methods to paused
    function pause() public override onlyGuardianOrGovernor {
        _pause();
    }

    /// @notice set pausable methods to unpaused
    function unpause() public override onlyGuardianOrGovernor {
        _unpause();
    }

    /// @notice address of the Core contract referenced
    /// @return ICore implementation address
    function core() public view override returns (ICore) {
        return _core;
    }

    /// @notice address of the Chi contract referenced by Core
    /// @return IChi implementation address
    function chi() public view override returns (IChi) {
        return _chi;
    }

    /// @notice address of the Zen contract referenced by Core
    /// @return IERC20 implementation address
    function zen() public view override returns (IERC20) {
        return _zen;
    }

    /// @notice chi balance of contract
    /// @return chi amount held
    function chiBalance() public view override returns (uint256) {
        return _chi.balanceOf(address(this));
    }

    /// @notice zen balance of contract
    /// @return zen amount held
    function zenBalance() public view override returns (uint256) {
        return _zen.balanceOf(address(this));
    }

    function _burnChiHeld() internal {
        _chi.burn(chiBalance());
    }

    function _mintChi(address to, uint256 amount) internal virtual {
        if (amount != 0) {
            _chi.mint(to, amount);
        }
    }
}

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.4;

import "../core/ICore.sol";

/// @title CoreRef interface
interface ICoreRef {
    // ----------- Events -----------

    event CoreUpdate(address indexed oldCore, address indexed newCore);

    // ----------- Governor or Guardian only state changing api -----------

    function pause() external;

    function unpause() external;

    // ----------- Getters -----------

    function core() external view returns (ICore);

    function chi() external view returns (IChi);

    function zen() external view returns (IERC20);

    function chiBalance() external view returns (uint256);

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

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface IDividendsV2 {
  function distributedTokensLength() external view returns (uint256);

  function distributedToken(uint256 index) external view returns (address);

  function isDistributedToken(address token) external view returns (bool);

  function addDividendsToPending(address token, uint256 amount) external;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface IXZenTokenUsage {
    function allocate(address userAddress, uint256 amount, bytes calldata data) external;
    function deallocate(address userAddress, uint256 amount, bytes calldata data) external;
}

{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "evmVersion": "paris",
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"address","name":"xZenToken_","type":"address"},{"internalType":"uint256","name":"startTime_","type":"uint256"},{"internalType":"address","name":"_core","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"oldCore","type":"address"},{"indexed":true,"internalType":"address","name":"newCore","type":"address"}],"name":"CoreUpdate","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"token","type":"address"},{"indexed":false,"internalType":"uint256","name":"previousValue","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"newValue","type":"uint256"}],"name":"CycleDividendsPercentUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"token","type":"address"}],"name":"DistributedTokenDisabled","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"token","type":"address"}],"name":"DistributedTokenEnabled","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"token","type":"address"}],"name":"DistributedTokenRemoved","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"token","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"DividendsAddedToPending","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"address","name":"token","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"DividendsCollected","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"}],"name":"Paused","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"}],"name":"Unpaused","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"previousBalance","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"newBalance","type":"uint256"}],"name":"UserUpdated","type":"event"},{"inputs":[],"name":"DEFAULT_CYCLE_DIVIDENDS_PERCENT","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"MAX_CYCLE_DIVIDENDS_PERCENT","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"MAX_DISTRIBUTED_TOKENS","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"MIN_CYCLE_DIVIDENDS_PERCENT","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"addDividendsToPending","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"userAddress","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"bytes","name":"","type":"bytes"}],"name":"allocate","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"chi","outputs":[{"internalType":"contract IChi","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"chiBalance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"core","outputs":[{"internalType":"contract ICore","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"currentCycleStartTime","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"cycleDurationSeconds","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"userAddress","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"bytes","name":"","type":"bytes"}],"name":"deallocate","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"disableDistributedToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"index","type":"uint256"}],"name":"distributedToken","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"distributedTokensLength","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"dividendsInfo","outputs":[{"internalType":"uint256","name":"currentDistributionAmount","type":"uint256"},{"internalType":"uint256","name":"currentCycleDistributedAmount","type":"uint256"},{"internalType":"uint256","name":"pendingAmount","type":"uint256"},{"internalType":"uint256","name":"distributedAmount","type":"uint256"},{"internalType":"uint256","name":"accDividendsPerShare","type":"uint256"},{"internalType":"uint256","name":"lastUpdateTime","type":"uint256"},{"internalType":"uint256","name":"cycleDividendsPercent","type":"uint256"},{"internalType":"bool","name":"distributionDisabled","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"contract IERC20","name":"token","type":"address"}],"name":"emergencyWithdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"emergencyWithdrawAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"enableDistributedToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"harvestAllDividends","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"harvestDividends","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"isDistributedToken","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"massUpdateDividendsInfo","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"nextCycleStartTime","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"address","name":"userAddress","type":"address"}],"name":"pendingDividendsAmount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"tokenToRemove","type":"address"}],"name":"removeTokenFromDistributedTokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"totalAllocation","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"unpause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"updateCurrentCycleStartTime","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"percent","type":"uint256"}],"name":"updateCycleDividendsPercent","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"updateDividendsInfo","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"users","outputs":[{"internalType":"uint256","name":"pendingDividends","type":"uint256"},{"internalType":"uint256","name":"rewardDebt","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"usersAllocation","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"xZenToken","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"zen","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"zenBalance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}]

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

000000000000000000000000b97cb8d98e5fa6a8f6f9dfb1eede9daedc3b7e5800000000000000000000000000000000000000000000000000000000663c1200000000000000000000000000463a02e3dfd1ca2a5bf90dc938b784ed1ea5d24c

-----Decoded View---------------
Arg [0] : xZenToken_ (address): 0xb97CB8d98e5Fa6a8F6F9dfb1eEDe9DaEdC3B7E58
Arg [1] : startTime_ (uint256): 1715212800
Arg [2] : _core (address): 0x463a02e3dfD1CA2A5bF90Dc938B784eD1eA5D24C

-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 000000000000000000000000b97cb8d98e5fa6a8f6f9dfb1eede9daedc3b7e58
Arg [1] : 00000000000000000000000000000000000000000000000000000000663c1200
Arg [2] : 000000000000000000000000463a02e3dfd1ca2a5bf90dc938b784ed1ea5d24c