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// SPDX-License-Identifier: AGPL-3.0-only

/*
    TokenState.sol - SKALE Manager
    Copyright (C) 2019-Present SKALE Labs
    @author Dmytro Stebaiev

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

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

    You should have received a copy of the GNU Affero General Public License
    along with SKALE Manager.  If not, see <https://www.gnu.org/licenses/>.
*/

pragma solidity 0.8.11;

import "@skalenetwork/skale-manager-interfaces/delegation/ITokenState.sol";
import "@skalenetwork/skale-manager-interfaces/delegation/ILocker.sol";
import "@skalenetwork/skale-manager-interfaces/delegation/IDelegationController.sol";

import "../Permissions.sol";


/**
 * @title Token State
 * @dev This contract manages lockers to control token transferability.
 * 
 * The SKALE Network has three types of locked tokens:
 * 
 * - Tokens that are transferrable but are currently locked into delegation with
 * a validator.
 * 
 * - Tokens that are not transferable from one address to another, but may be
 * delegated to a validator `getAndUpdateLockedAmount`. This lock enforces
 * Proof-of-Use requirements.
 * 
 * - Tokens that are neither transferable nor delegatable
 * `getAndUpdateForbiddenForDelegationAmount`. This lock enforces slashing.
 */
contract TokenState is Permissions, ILocker, ITokenState {

    string[] private _lockers;

    IDelegationController private _delegationController;

    bytes32 public constant LOCKER_MANAGER_ROLE = keccak256("LOCKER_MANAGER_ROLE");

    modifier onlyLockerManager() {
        require(hasRole(LOCKER_MANAGER_ROLE, msg.sender), "LOCKER_MANAGER_ROLE is required");
        _;
    }

    /**
     *  @dev See {ILocker-getAndUpdateLockedAmount}.
     */
    function getAndUpdateLockedAmount(address holder) external override returns (uint) {
        if (address(_delegationController) == address(0)) {
            _delegationController =
                IDelegationController(contractManager.getContract("DelegationController"));
        }
        uint locked = 0;
        if (_delegationController.getDelegationsByHolderLength(holder) > 0) {
            // the holder ever delegated
            for (uint i = 0; i < _lockers.length; ++i) {
                ILocker locker = ILocker(contractManager.getContract(_lockers[i]));
                locked = locked + locker.getAndUpdateLockedAmount(holder);
            }
        }
        return locked;
    }

    /**
     * @dev See {ILocker-getAndUpdateForbiddenForDelegationAmount}.
     */
    function getAndUpdateForbiddenForDelegationAmount(address holder) external override returns (uint amount) {
        uint forbidden = 0;
        for (uint i = 0; i < _lockers.length; ++i) {
            ILocker locker = ILocker(contractManager.getContract(_lockers[i]));
            forbidden = forbidden + locker.getAndUpdateForbiddenForDelegationAmount(holder);
        }
        return forbidden;
    }

    /**
     * @dev Allows the Owner to remove a contract from the locker.
     * 
     * Emits a {LockerWasRemoved} event.
     */
    function removeLocker(string calldata locker) external override onlyLockerManager {
        uint index;
        bytes32 hash = keccak256(abi.encodePacked(locker));
        for (index = 0; index < _lockers.length; ++index) {
            if (keccak256(abi.encodePacked(_lockers[index])) == hash) {
                break;
            }
        }
        if (index < _lockers.length) {
            if (index < _lockers.length - 1) {
                _lockers[index] = _lockers[_lockers.length - 1];
            }
            delete _lockers[_lockers.length - 1];
            _lockers.pop();
            emit LockerWasRemoved(locker);
        }
    }

    function initialize(address contractManagerAddress) public override initializer {
        Permissions.initialize(contractManagerAddress);
        _setupRole(LOCKER_MANAGER_ROLE, msg.sender);
        addLocker("DelegationController");
        addLocker("Punisher");
    }

    /**
     * @dev Allows the Owner to add a contract to the Locker.
     * 
     * Emits a {LockerWasAdded} event.
     */
    function addLocker(string memory locker) public override onlyLockerManager {
        _lockers.push(locker);
        emit LockerWasAdded(locker);
    }
}

// SPDX-License-Identifier: AGPL-3.0-only

/*
    ITokenState.sol - SKALE Manager
    Copyright (C) 2018-Present SKALE Labs
    @author Artem Payvin

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

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

    You should have received a copy of the GNU Affero General Public License
    along with SKALE Manager.  If not, see <https://www.gnu.org/licenses/>.
*/

pragma solidity >=0.6.10 <0.9.0;

interface ITokenState {
    /**
     * @dev Emitted when a contract is added to the locker.
     */
    event LockerWasAdded(
        string locker
    );

    /**
     * @dev Emitted when a contract is removed from the locker.
     */
    event LockerWasRemoved(
        string locker
    );
    
    function removeLocker(string calldata locker) external;
    function addLocker(string memory locker) external;
}

// SPDX-License-Identifier: AGPL-3.0-only

/*
    ILocker.sol - SKALE Manager
    Copyright (C) 2019-Present SKALE Labs
    @author Dmytro Stebaiev

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

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

    You should have received a copy of the GNU Affero General Public License
    along with SKALE Manager.  If not, see <https://www.gnu.org/licenses/>.
*/

pragma solidity >=0.6.10 <0.9.0;

/**
 * @dev Interface of the Locker functions.
 */
interface ILocker {
    /**
     * @dev Returns and updates the total amount of locked tokens of a given 
     * `holder`.
     */
    function getAndUpdateLockedAmount(address wallet) external returns (uint);

    /**
     * @dev Returns and updates the total non-transferrable and un-delegatable
     * amount of a given `holder`.
     */
    function getAndUpdateForbiddenForDelegationAmount(address wallet) external returns (uint);
}

// SPDX-License-Identifier: AGPL-3.0-only

/*
    IDelegationController.sol - SKALE Manager
    Copyright (C) 2018-Present SKALE Labs
    @author Artem Payvin

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

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

    You should have received a copy of the GNU Affero General Public License
    along with SKALE Manager.  If not, see <https://www.gnu.org/licenses/>.
*/

pragma solidity >=0.6.10 <0.9.0;

interface IDelegationController {
    enum State {
        PROPOSED,
        ACCEPTED,
        CANCELED,
        REJECTED,
        DELEGATED,
        UNDELEGATION_REQUESTED,
        COMPLETED
    }

    struct Delegation {
        address holder; // address of token owner
        uint validatorId;
        uint amount;
        uint delegationPeriod;
        uint created; // time of delegation creation
        uint started; // month when a delegation becomes active
        uint finished; // first month after a delegation ends
        string info;
    }

    /**
     * @dev Emitted when validator was confiscated.
     */
    event Confiscated(
        uint indexed validatorId,
        uint amount
    );

    /**
     * @dev Emitted when validator was confiscated.
     */
    event SlashesProcessed(
        address indexed holder,
        uint limit
    );

    /**
     * @dev Emitted when a delegation is proposed to a validator.
     */
    event DelegationProposed(
        uint delegationId
    );

    /**
     * @dev Emitted when a delegation is accepted by a validator.
     */
    event DelegationAccepted(
        uint delegationId
    );

    /**
     * @dev Emitted when a delegation is cancelled by the delegator.
     */
    event DelegationRequestCanceledByUser(
        uint delegationId
    );

    /**
     * @dev Emitted when a delegation is requested to undelegate.
     */
    event UndelegationRequested(
        uint delegationId
    );
    
    function getAndUpdateDelegatedToValidatorNow(uint validatorId) external returns (uint);
    function getAndUpdateDelegatedAmount(address holder) external returns (uint);
    function getAndUpdateEffectiveDelegatedByHolderToValidator(address holder, uint validatorId, uint month)
        external
        returns (uint effectiveDelegated);
    function delegate(
        uint validatorId,
        uint amount,
        uint delegationPeriod,
        string calldata info
    )
        external;
    function cancelPendingDelegation(uint delegationId) external;
    function acceptPendingDelegation(uint delegationId) external;
    function requestUndelegation(uint delegationId) external;
    function confiscate(uint validatorId, uint amount) external;
    function getAndUpdateEffectiveDelegatedToValidator(uint validatorId, uint month) external returns (uint);
    function getAndUpdateDelegatedByHolderToValidatorNow(address holder, uint validatorId) external returns (uint);
    function processSlashes(address holder, uint limit) external;
    function processAllSlashes(address holder) external;
    function getEffectiveDelegatedValuesByValidator(uint validatorId) external view returns (uint[] memory);
    function getEffectiveDelegatedToValidator(uint validatorId, uint month) external view returns (uint);
    function getDelegatedToValidator(uint validatorId, uint month) external view returns (uint);
    function getDelegation(uint delegationId) external view returns (Delegation memory);
    function getFirstDelegationMonth(address holder, uint validatorId) external view returns(uint);
    function getDelegationsByValidatorLength(uint validatorId) external view returns (uint);
    function getDelegationsByHolderLength(address holder) external view returns (uint);
    function getState(uint delegationId) external view returns (State state);
    function getLockedInPendingDelegations(address holder) external view returns (uint);
    function hasUnprocessedSlashes(address holder) external view returns (bool);
}

// SPDX-License-Identifier: AGPL-3.0-only

/*
    Permissions.sol - SKALE Manager
    Copyright (C) 2018-Present SKALE Labs
    @author Artem Payvin

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

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

    You should have received a copy of the GNU Affero General Public License
    along with SKALE Manager.  If not, see <https://www.gnu.org/licenses/>.
*/

pragma solidity 0.8.11;

import "@skalenetwork/skale-manager-interfaces/IContractManager.sol";
import "@skalenetwork/skale-manager-interfaces/IPermissions.sol";

import "./thirdparty/openzeppelin/AccessControlUpgradeableLegacy.sol";


/**
 * @title Permissions
 * @dev Contract is connected module for Upgradeable approach, knows ContractManager
 */
contract Permissions is AccessControlUpgradeableLegacy, IPermissions {
    using AddressUpgradeable for address;
    
    IContractManager public contractManager;

    /**
     * @dev Modifier to make a function callable only when caller is the Owner.
     * 
     * Requirements:
     * 
     * - The caller must be the owner.
     */
    modifier onlyOwner() {
        require(_isOwner(), "Caller is not the owner");
        _;
    }

    /**
     * @dev Modifier to make a function callable only when caller is an Admin.
     * 
     * Requirements:
     * 
     * - The caller must be an admin.
     */
    modifier onlyAdmin() {
        require(_isAdmin(msg.sender), "Caller is not an admin");
        _;
    }

    /**
     * @dev Modifier to make a function callable only when caller is the Owner 
     * or `contractName` contract.
     * 
     * Requirements:
     * 
     * - The caller must be the owner or `contractName`.
     */
    modifier allow(string memory contractName) {
        require(
            contractManager.getContract(contractName) == msg.sender || _isOwner(),
            "Message sender is invalid");
        _;
    }

    /**
     * @dev Modifier to make a function callable only when caller is the Owner 
     * or `contractName1` or `contractName2` contract.
     * 
     * Requirements:
     * 
     * - The caller must be the owner, `contractName1`, or `contractName2`.
     */
    modifier allowTwo(string memory contractName1, string memory contractName2) {
        require(
            contractManager.getContract(contractName1) == msg.sender ||
            contractManager.getContract(contractName2) == msg.sender ||
            _isOwner(),
            "Message sender is invalid");
        _;
    }

    /**
     * @dev Modifier to make a function callable only when caller is the Owner 
     * or `contractName1`, `contractName2`, or `contractName3` contract.
     * 
     * Requirements:
     * 
     * - The caller must be the owner, `contractName1`, `contractName2`, or 
     * `contractName3`.
     */
    modifier allowThree(string memory contractName1, string memory contractName2, string memory contractName3) {
        require(
            contractManager.getContract(contractName1) == msg.sender ||
            contractManager.getContract(contractName2) == msg.sender ||
            contractManager.getContract(contractName3) == msg.sender ||
            _isOwner(),
            "Message sender is invalid");
        _;
    }

    function initialize(address contractManagerAddress) public virtual override initializer {
        AccessControlUpgradeableLegacy.__AccessControl_init();
        _setupRole(DEFAULT_ADMIN_ROLE, msg.sender);
        _setContractManager(contractManagerAddress);
    }

    function _isOwner() internal view returns (bool) {
        return hasRole(DEFAULT_ADMIN_ROLE, msg.sender);
    }

    function _isAdmin(address account) internal view returns (bool) {
        address skaleManagerAddress = contractManager.contracts(keccak256(abi.encodePacked("SkaleManager")));
        if (skaleManagerAddress != address(0)) {
            AccessControlUpgradeableLegacy skaleManager = AccessControlUpgradeableLegacy(skaleManagerAddress);
            return skaleManager.hasRole(keccak256("ADMIN_ROLE"), account) || _isOwner();
        } else {
            return _isOwner();
        }
    }

    function _setContractManager(address contractManagerAddress) private {
        require(contractManagerAddress != address(0), "ContractManager address is not set");
        require(contractManagerAddress.isContract(), "Address is not contract");
        contractManager = IContractManager(contractManagerAddress);
    }
}

// SPDX-License-Identifier: AGPL-3.0-only

/*
    IContractManager.sol - SKALE Manager Interfaces
    Copyright (C) 2021-Present SKALE Labs
    @author Dmytro Stebaeiv

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

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

    You should have received a copy of the GNU Affero General Public License
    along with SKALE Manager Interfaces.  If not, see <https://www.gnu.org/licenses/>.
*/

pragma solidity >=0.6.10 <0.9.0;

interface IContractManager {
    /**
     * @dev Emitted when contract is upgraded.
     */
    event ContractUpgraded(string contractsName, address contractsAddress);

    function initialize() external;
    function setContractsAddress(string calldata contractsName, address newContractsAddress) external;
    function contracts(bytes32 nameHash) external view returns (address);
    function getDelegationPeriodManager() external view returns (address);
    function getBounty() external view returns (address);
    function getValidatorService() external view returns (address);
    function getTimeHelpers() external view returns (address);
    function getConstantsHolder() external view returns (address);
    function getSkaleToken() external view returns (address);
    function getTokenState() external view returns (address);
    function getPunisher() external view returns (address);
    function getContract(string calldata name) external view returns (address);
}

// SPDX-License-Identifier: AGPL-3.0-only

/*
    IPermissions.sol - SKALE Manager
    Copyright (C) 2018-Present SKALE Labs
    @author Artem Payvin

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

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

    You should have received a copy of the GNU Affero General Public License
    along with SKALE Manager.  If not, see <https://www.gnu.org/licenses/>.
*/

pragma solidity >=0.6.10 <0.9.0;

interface IPermissions {
    function initialize(address contractManagerAddress) external;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.7;

import "@openzeppelin/contracts-upgradeable/utils/structs/EnumerableSetUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol";
import "@skalenetwork/skale-manager-interfaces/thirdparty/openzeppelin/IAccessControlUpgradeableLegacy.sol";
import "./InitializableWithGap.sol";

/**
 * @dev Contract module that allows children to implement role-based access
 * control mechanisms.
 *
 * 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:
 *
 * ```
 * 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}:
 *
 * ```
 * function foo() public {
 *     require(hasRole(MY_ROLE, _msgSender()));
 *     ...
 * }
 * ```
 *
 * 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}.
 */
abstract contract AccessControlUpgradeableLegacy is InitializableWithGap, ContextUpgradeable, IAccessControlUpgradeableLegacy {
    function __AccessControl_init() internal initializer {
        __Context_init_unchained();
        __AccessControl_init_unchained();
    }

    function __AccessControl_init_unchained() internal initializer {


    }

    using EnumerableSetUpgradeable for EnumerableSetUpgradeable.AddressSet;

    struct RoleData {
        EnumerableSetUpgradeable.AddressSet members;
        bytes32 adminRole;
    }

    mapping (bytes32 => RoleData) private _roles;

    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;

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

    /**
     * @dev Returns the number of accounts that have `role`. Can be used
     * together with {getRoleMember} to enumerate all bearers of a role.
     */
    function getRoleMemberCount(bytes32 role) public view override returns (uint256) {
        return _roles[role].members.length();
    }

    /**
     * @dev Returns one of the accounts that have `role`. `index` must be a
     * value between 0 and {getRoleMemberCount}, non-inclusive.
     *
     * Role bearers are not sorted in any particular way, and their ordering may
     * change at any point.
     *
     * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure
     * you perform all queries on the same block. See the following
     * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]
     * for more information.
     */
    function getRoleMember(bytes32 role, uint256 index) public view override returns (address) {
        return _roles[role].members.at(index);
    }

    /**
     * @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 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.
     */
    function grantRole(bytes32 role, address account) public virtual override {
        require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to grant");

        _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.
     */
    function revokeRole(bytes32 role, address account) public virtual override {
        require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to revoke");

        _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 granted `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     */
    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.
     *
     * [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}.
     * ====
     */
    function _setupRole(bytes32 role, address account) internal virtual {
        _grantRole(role, account);
    }

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

    function _grantRole(bytes32 role, address account) private {
        if (_roles[role].members.add(account)) {
            emit RoleGranted(role, account, _msgSender());
        }
    }

    function _revokeRole(bytes32 role, address account) private {
        if (_roles[role].members.remove(account)) {
            emit RoleRevoked(role, account, _msgSender());
        }
    }

    uint256[49] private __gap;
}

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

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.
 *
 * ```
 * 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.
 */
library EnumerableSetUpgradeable {
    // 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) {
        return _values(set._inner);
    }

    // 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;

        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 on 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;

        assembly {
            result := store
        }

        return result;
    }
}

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

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

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

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

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

// SPDX-License-Identifier: AGPL-3.0-only

/*
    IAccessControlUpgradeableLegacy.sol - SKALE Manager
    Copyright (C) 2018-Present SKALE Labs
    @author Artem Payvin

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

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

    You should have received a copy of the GNU Affero General Public License
    along with SKALE Manager.  If not, see <https://www.gnu.org/licenses/>.
*/

pragma solidity >=0.6.10 <0.9.0;

interface IAccessControlUpgradeableLegacy {
    /**
     * @dev Emitted when `account` is granted `role`.
     *
     * `sender` is the account that originated the contract call, an admin role
     * bearer except when using {_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);
    
    function grantRole(bytes32 role, address account) external;
    function revokeRole(bytes32 role, address account) external;
    function renounceRole(bytes32 role, address account) external;
    function hasRole(bytes32 role, address account) external view returns (bool);
    function getRoleMemberCount(bytes32 role) external view returns (uint256);
    function getRoleMember(bytes32 role, uint256 index) external view returns (address);
    function getRoleAdmin(bytes32 role) external view returns (bytes32);
}

// SPDX-License-Identifier: AGPL-3.0-only

pragma solidity ^0.8.7;

import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";


contract InitializableWithGap is Initializable {
    uint256[50] private ______gap;
}

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

pragma solidity ^0.8.0;

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

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

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

    /**
     * @dev Modifier to protect an initializer function from being invoked twice.
     */
    modifier initializer() {
        // If the contract is initializing we ignore whether _initialized is set in order to support multiple
        // inheritance patterns, but we only do this in the context of a constructor, because in other contexts the
        // contract may have been reentered.
        require(_initializing ? _isConstructor() : !_initialized, "Initializable: contract is already initialized");

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

        _;

        if (isTopLevelCall) {
            _initializing = false;
        }
    }

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

    function _isConstructor() private view returns (bool) {
        return !AddressUpgradeable.isContract(address(this));
    }
}

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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

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

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

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

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

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

• No Contract Security Audit Submitted- Submit Audit Here

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