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

/*
    Distributor.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 "@openzeppelin/contracts/utils/introspection/IERC1820Registry.sol";
import "@openzeppelin/contracts/token/ERC777/IERC777Recipient.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

import "@skalenetwork/skale-manager-interfaces/delegation/IDistributor.sol";
import "@skalenetwork/skale-manager-interfaces/delegation/IValidatorService.sol";
import "@skalenetwork/skale-manager-interfaces/delegation/IDelegationController.sol";
import "@skalenetwork/skale-manager-interfaces/delegation/ITimeHelpers.sol";

import "../Permissions.sol";
import "../ConstantsHolder.sol";
import "../utils/MathUtils.sol";


/**
 * @title Distributor
 * @dev This contract handles all distribution functions of bounty and fee
 * payments.
 */
contract Distributor is Permissions, IERC777Recipient, IDistributor {
    using MathUtils for uint;

    IERC1820Registry private _erc1820;

    // validatorId =>        month => token
    mapping (uint => mapping (uint => uint)) private _bountyPaid;
    // validatorId =>        month => token
    mapping (uint => mapping (uint => uint)) private _feePaid;
    //        holder =>   validatorId => month
    mapping (address => mapping (uint => uint)) private _firstUnwithdrawnMonth;
    // validatorId => month
    mapping (uint => uint) private _firstUnwithdrawnMonthForValidator;

    /**
     * @dev Return and update the amount of earned bounty from a validator.
     */
    function getAndUpdateEarnedBountyAmount(uint validatorId) external override returns (uint earned, uint endMonth) {
        return getAndUpdateEarnedBountyAmountOf(msg.sender, validatorId);
    }

    /**
     * @dev Allows msg.sender to withdraw earned bounty. Bounties are locked
     * until launchTimestamp and BOUNTY_LOCKUP_MONTHS have both passed.
     * 
     * Emits a {WithdrawBounty} event.
     * 
     * Requirements:
     * 
     * - Bounty must be unlocked.
     */
    function withdrawBounty(uint validatorId, address to) external override {
        ITimeHelpers timeHelpers = ITimeHelpers(contractManager.getContract("TimeHelpers"));
        ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder"));

        require(block.timestamp >= timeHelpers.addMonths(
                constantsHolder.launchTimestamp(),
                constantsHolder.BOUNTY_LOCKUP_MONTHS()
            ), "Bounty is locked");

        uint bounty;
        uint endMonth;
        (bounty, endMonth) = getAndUpdateEarnedBountyAmountOf(msg.sender, validatorId);

        _firstUnwithdrawnMonth[msg.sender][validatorId] = endMonth;

        IERC20 skaleToken = IERC20(contractManager.getContract("SkaleToken"));
        require(skaleToken.transfer(to, bounty), "Failed to transfer tokens");

        emit WithdrawBounty(
            msg.sender,
            validatorId,
            to,
            bounty
        );
    }

    /**
     * @dev Allows `msg.sender` to withdraw earned validator fees. Fees are 
     * locked until launchTimestamp and BOUNTY_LOCKUP_MONTHS both have passed.
     * 
     * Emits a {WithdrawFee} event.
     * 
     * Requirements:
     * 
     * - Fee must be unlocked.
     */
    function withdrawFee(address to) external override {
        IValidatorService validatorService = IValidatorService(contractManager.getContract("ValidatorService"));
        IERC20 skaleToken = IERC20(contractManager.getContract("SkaleToken"));
        ITimeHelpers timeHelpers = ITimeHelpers(contractManager.getContract("TimeHelpers"));
        ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder"));

        require(block.timestamp >= timeHelpers.addMonths(
                constantsHolder.launchTimestamp(),
                constantsHolder.BOUNTY_LOCKUP_MONTHS()
            ), "Fee is locked");
        // check Validator Exist inside getValidatorId
        uint validatorId = validatorService.getValidatorId(msg.sender);

        uint fee;
        uint endMonth;
        (fee, endMonth) = getEarnedFeeAmountOf(validatorId);

        _firstUnwithdrawnMonthForValidator[validatorId] = endMonth;

        require(skaleToken.transfer(to, fee), "Failed to transfer tokens");

        emit WithdrawFee(
            validatorId,
            to,
            fee
        );
    }

    function tokensReceived(
        address,
        address,
        address to,
        uint256 amount,
        bytes calldata userData,
        bytes calldata
    )
        external
        override
        allow("SkaleToken")
    {
        require(to == address(this), "Receiver is incorrect");
        require(userData.length == 32, "Data length is incorrect");
        uint validatorId = abi.decode(userData, (uint));
        _distributeBounty(amount, validatorId);
    }

    /**
     * @dev Return the amount of earned validator fees of `msg.sender`.
     */
    function getEarnedFeeAmount() external view override returns (uint earned, uint endMonth) {
        IValidatorService validatorService = IValidatorService(contractManager.getContract("ValidatorService"));
        return getEarnedFeeAmountOf(validatorService.getValidatorId(msg.sender));
    }

    function initialize(address contractsAddress) public override initializer {
        Permissions.initialize(contractsAddress);
        _erc1820 = IERC1820Registry(0x1820a4B7618BdE71Dce8cdc73aAB6C95905faD24);
        _erc1820.setInterfaceImplementer(address(this), keccak256("ERC777TokensRecipient"), address(this));
    }

    /**
     * @dev Return and update the amount of earned bounties.
     */
    function getAndUpdateEarnedBountyAmountOf(address wallet, uint validatorId)
        public
        override
        returns (uint earned, uint endMonth)
    {
        IDelegationController delegationController = IDelegationController(
            contractManager.getContract("DelegationController"));
        ITimeHelpers timeHelpers = ITimeHelpers(contractManager.getContract("TimeHelpers"));

        uint currentMonth = timeHelpers.getCurrentMonth();

        uint startMonth = _firstUnwithdrawnMonth[wallet][validatorId];
        if (startMonth == 0) {
            startMonth = delegationController.getFirstDelegationMonth(wallet, validatorId);
            if (startMonth == 0) {
                return (0, 0);
            }
        }

        earned = 0;
        endMonth = currentMonth;
        if (endMonth > startMonth + 12) {
            endMonth = startMonth + 12;
        }
        for (uint i = startMonth; i < endMonth; ++i) {
            uint effectiveDelegatedToValidator =
                delegationController.getAndUpdateEffectiveDelegatedToValidator(validatorId, i);
            if (effectiveDelegatedToValidator.muchGreater(0)) {
                earned = earned + 
                    _bountyPaid[validatorId][i] *
                    delegationController.getAndUpdateEffectiveDelegatedByHolderToValidator(wallet, validatorId, i) /
                    effectiveDelegatedToValidator;
            }
        }
    }

    /**
     * @dev Return the amount of earned fees by validator ID.
     */
    function getEarnedFeeAmountOf(uint validatorId) public view override returns (uint earned, uint endMonth) {
        ITimeHelpers timeHelpers = ITimeHelpers(contractManager.getContract("TimeHelpers"));

        uint currentMonth = timeHelpers.getCurrentMonth();

        uint startMonth = _firstUnwithdrawnMonthForValidator[validatorId];
        if (startMonth == 0) {
            return (0, 0);
        }

        earned = 0;
        endMonth = currentMonth;
        if (endMonth > startMonth + 12) {
            endMonth = startMonth + 12;
        }
        for (uint i = startMonth; i < endMonth; ++i) {
            earned = earned + _feePaid[validatorId][i];
        }
    }

    // private

    /**
     * @dev Distributes bounties to delegators.
     * 
     * Emits a {BountyWasPaid} event.
     */
    function _distributeBounty(uint amount, uint validatorId) private {
        ITimeHelpers timeHelpers = ITimeHelpers(contractManager.getContract("TimeHelpers"));
        IValidatorService validatorService = IValidatorService(contractManager.getContract("ValidatorService"));

        uint currentMonth = timeHelpers.getCurrentMonth();
        uint feeRate = validatorService.getValidator(validatorId).feeRate;

        uint fee = amount * feeRate / 1000;
        uint bounty = amount - fee;
        _bountyPaid[validatorId][currentMonth] = _bountyPaid[validatorId][currentMonth] + bounty;
        _feePaid[validatorId][currentMonth] = _feePaid[validatorId][currentMonth] + fee;

        if (_firstUnwithdrawnMonthForValidator[validatorId] == 0) {
            _firstUnwithdrawnMonthForValidator[validatorId] = currentMonth;
        }

        emit BountyWasPaid(validatorId, amount);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC1820Registry.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the global ERC1820 Registry, as defined in the
 * https://eips.ethereum.org/EIPS/eip-1820[EIP]. Accounts may register
 * implementers for interfaces in this registry, as well as query support.
 *
 * Implementers may be shared by multiple accounts, and can also implement more
 * than a single interface for each account. Contracts can implement interfaces
 * for themselves, but externally-owned accounts (EOA) must delegate this to a
 * contract.
 *
 * {IERC165} interfaces can also be queried via the registry.
 *
 * For an in-depth explanation and source code analysis, see the EIP text.
 */
interface IERC1820Registry {
    /**
     * @dev Sets `newManager` as the manager for `account`. A manager of an
     * account is able to set interface implementers for it.
     *
     * By default, each account is its own manager. Passing a value of `0x0` in
     * `newManager` will reset the manager to this initial state.
     *
     * Emits a {ManagerChanged} event.
     *
     * Requirements:
     *
     * - the caller must be the current manager for `account`.
     */
    function setManager(address account, address newManager) external;

    /**
     * @dev Returns the manager for `account`.
     *
     * See {setManager}.
     */
    function getManager(address account) external view returns (address);

    /**
     * @dev Sets the `implementer` contract as ``account``'s implementer for
     * `interfaceHash`.
     *
     * `account` being the zero address is an alias for the caller's address.
     * The zero address can also be used in `implementer` to remove an old one.
     *
     * See {interfaceHash} to learn how these are created.
     *
     * Emits an {InterfaceImplementerSet} event.
     *
     * Requirements:
     *
     * - the caller must be the current manager for `account`.
     * - `interfaceHash` must not be an {IERC165} interface id (i.e. it must not
     * end in 28 zeroes).
     * - `implementer` must implement {IERC1820Implementer} and return true when
     * queried for support, unless `implementer` is the caller. See
     * {IERC1820Implementer-canImplementInterfaceForAddress}.
     */
    function setInterfaceImplementer(
        address account,
        bytes32 _interfaceHash,
        address implementer
    ) external;

    /**
     * @dev Returns the implementer of `interfaceHash` for `account`. If no such
     * implementer is registered, returns the zero address.
     *
     * If `interfaceHash` is an {IERC165} interface id (i.e. it ends with 28
     * zeroes), `account` will be queried for support of it.
     *
     * `account` being the zero address is an alias for the caller's address.
     */
    function getInterfaceImplementer(address account, bytes32 _interfaceHash) external view returns (address);

    /**
     * @dev Returns the interface hash for an `interfaceName`, as defined in the
     * corresponding
     * https://eips.ethereum.org/EIPS/eip-1820#interface-name[section of the EIP].
     */
    function interfaceHash(string calldata interfaceName) external pure returns (bytes32);

    /**
     * @notice Updates the cache with whether the contract implements an ERC165 interface or not.
     * @param account Address of the contract for which to update the cache.
     * @param interfaceId ERC165 interface for which to update the cache.
     */
    function updateERC165Cache(address account, bytes4 interfaceId) external;

    /**
     * @notice Checks whether a contract implements an ERC165 interface or not.
     * If the result is not cached a direct lookup on the contract address is performed.
     * If the result is not cached or the cached value is out-of-date, the cache MUST be updated manually by calling
     * {updateERC165Cache} with the contract address.
     * @param account Address of the contract to check.
     * @param interfaceId ERC165 interface to check.
     * @return True if `account` implements `interfaceId`, false otherwise.
     */
    function implementsERC165Interface(address account, bytes4 interfaceId) external view returns (bool);

    /**
     * @notice Checks whether a contract implements an ERC165 interface or not without using nor updating the cache.
     * @param account Address of the contract to check.
     * @param interfaceId ERC165 interface to check.
     * @return True if `account` implements `interfaceId`, false otherwise.
     */
    function implementsERC165InterfaceNoCache(address account, bytes4 interfaceId) external view returns (bool);

    event InterfaceImplementerSet(address indexed account, bytes32 indexed interfaceHash, address indexed implementer);

    event ManagerChanged(address indexed account, address indexed newManager);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC777/IERC777Recipient.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC777TokensRecipient standard as defined in the EIP.
 *
 * Accounts can be notified of {IERC777} tokens being sent to them by having a
 * contract implement this interface (contract holders can be their own
 * implementer) and registering it on the
 * https://eips.ethereum.org/EIPS/eip-1820[ERC1820 global registry].
 *
 * See {IERC1820Registry} and {ERC1820Implementer}.
 */
interface IERC777Recipient {
    /**
     * @dev Called by an {IERC777} token contract whenever tokens are being
     * moved or created into a registered account (`to`). The type of operation
     * is conveyed by `from` being the zero address or not.
     *
     * This call occurs _after_ the token contract's state is updated, so
     * {IERC777-balanceOf}, etc., can be used to query the post-operation state.
     *
     * This function may revert to prevent the operation from being executed.
     */
    function tokensReceived(
        address operator,
        address from,
        address to,
        uint256 amount,
        bytes calldata userData,
        bytes calldata operatorData
    ) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

/*
    IDistributor.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 IDistributor {
    /**
     * @dev Emitted when bounty is withdrawn.
     */
    event WithdrawBounty(
        address holder,
        uint validatorId,
        address destination,
        uint amount
    );

    /**
     * @dev Emitted when a validator fee is withdrawn.
     */
    event WithdrawFee(
        uint validatorId,
        address destination,
        uint amount
    );

    /**
     * @dev Emitted when bounty is distributed.
     */
    event BountyWasPaid(
        uint validatorId,
        uint amount
    );
    
    function getAndUpdateEarnedBountyAmount(uint validatorId) external returns (uint earned, uint endMonth);
    function withdrawBounty(uint validatorId, address to) external;
    function withdrawFee(address to) external;
    function getAndUpdateEarnedBountyAmountOf(address wallet, uint validatorId)
        external
        returns (uint earned, uint endMonth);
    function getEarnedFeeAmount() external view returns (uint earned, uint endMonth);
    function getEarnedFeeAmountOf(uint validatorId) external view returns (uint earned, uint endMonth);
}

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

/*
    IValidatorService.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 IValidatorService {
    struct Validator {
        string name;
        address validatorAddress;
        address requestedAddress;
        string description;
        uint feeRate;
        uint registrationTime;
        uint minimumDelegationAmount;
        bool acceptNewRequests;
    }
    
    /**
     * @dev Emitted when a validator registers.
     */
    event ValidatorRegistered(
        uint validatorId
    );

    /**
     * @dev Emitted when a validator address changes.
     */
    event ValidatorAddressChanged(
        uint validatorId,
        address newAddress
    );

    /**
     * @dev Emitted when a validator is enabled.
     */
    event ValidatorWasEnabled(
        uint validatorId
    );

    /**
     * @dev Emitted when a validator is disabled.
     */
    event ValidatorWasDisabled(
        uint validatorId
    );

    /**
     * @dev Emitted when a node address is linked to a validator.
     */
    event NodeAddressWasAdded(
        uint validatorId,
        address nodeAddress
    );

    /**
     * @dev Emitted when a node address is unlinked from a validator.
     */
    event NodeAddressWasRemoved(
        uint validatorId,
        address nodeAddress
    );

    /**
     * @dev Emitted when whitelist disabled.
     */
    event WhitelistDisabled(bool status);

    /**
     * @dev Emitted when validator requested new address.
     */
    event RequestNewAddress(uint indexed validatorId, address previousAddress, address newAddress);

    /**
     * @dev Emitted when validator set new minimum delegation amount.
     */
    event SetMinimumDelegationAmount(uint indexed validatorId, uint previousMDA, uint newMDA);

    /**
     * @dev Emitted when validator set new name.
     */
    event SetValidatorName(uint indexed validatorId, string previousName, string newName);

    /**
     * @dev Emitted when validator set new description.
     */
    event SetValidatorDescription(uint indexed validatorId, string previousDescription, string newDescription);

    /**
     * @dev Emitted when validator start or stop accepting new delegation requests.
     */
    event AcceptingNewRequests(uint indexed validatorId, bool status);
    
    function registerValidator(
        string calldata name,
        string calldata description,
        uint feeRate,
        uint minimumDelegationAmount
    )
        external
        returns (uint validatorId);
    function enableValidator(uint validatorId) external;
    function disableValidator(uint validatorId) external;
    function disableWhitelist() external;
    function requestForNewAddress(address newValidatorAddress) external;
    function confirmNewAddress(uint validatorId) external;
    function linkNodeAddress(address nodeAddress, bytes calldata sig) external;
    function unlinkNodeAddress(address nodeAddress) external;
    function setValidatorMDA(uint minimumDelegationAmount) external;
    function setValidatorName(string calldata newName) external;
    function setValidatorDescription(string calldata newDescription) external;
    function startAcceptingNewRequests() external;
    function stopAcceptingNewRequests() external;
    function removeNodeAddress(uint validatorId, address nodeAddress) external;
    function getAndUpdateBondAmount(uint validatorId) external returns (uint);
    function getMyNodesAddresses() external view returns (address[] memory);
    function getTrustedValidators() external view returns (uint[] memory);
    function checkValidatorAddressToId(address validatorAddress, uint validatorId)
        external
        view
        returns (bool);
    function getValidatorIdByNodeAddress(address nodeAddress) external view returns (uint validatorId);
    function checkValidatorCanReceiveDelegation(uint validatorId, uint amount) external view;
    function getNodeAddresses(uint validatorId) external view returns (address[] memory);
    function validatorExists(uint validatorId) external view returns (bool);
    function validatorAddressExists(address validatorAddress) external view returns (bool);
    function checkIfValidatorAddressExists(address validatorAddress) external view;
    function getValidator(uint validatorId) external view returns (Validator memory);
    function getValidatorId(address validatorAddress) external view returns (uint);
    function isAcceptingNewRequests(uint validatorId) external view returns (bool);
    function isAuthorizedValidator(uint validatorId) external view returns (bool);
}

// 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

/*
    ITimeHelpers.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 ITimeHelpers {
    function calculateProofOfUseLockEndTime(uint month, uint lockUpPeriodDays) external view returns (uint timestamp);
    function getCurrentMonth() external view returns (uint);
    function timestampToYear(uint timestamp) external view returns (uint);
    function timestampToMonth(uint timestamp) external view returns (uint);
    function monthToTimestamp(uint month) external view returns (uint timestamp);
    function addDays(uint fromTimestamp, uint n) external pure returns (uint);
    function addMonths(uint fromTimestamp, uint n) external pure returns (uint);
    function addYears(uint fromTimestamp, uint n) external pure returns (uint);
}

// 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

/*
    ConstantsHolder.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/IConstantsHolder.sol";

import "./Permissions.sol";


/**
 * @title ConstantsHolder
 * @dev Contract contains constants and common variables for the SKALE Network.
 */
contract ConstantsHolder is Permissions, IConstantsHolder {

    // initial price for creating Node (100 SKL)
    uint public constant NODE_DEPOSIT = 100 * 1e18;

    uint8 public constant TOTAL_SPACE_ON_NODE = 128;

    // part of Node for Small Skale-chain (1/128 of Node)
    uint8 public constant SMALL_DIVISOR = 128;

    // part of Node for Medium Skale-chain (1/32 of Node)
    uint8 public constant MEDIUM_DIVISOR = 32;

    // part of Node for Large Skale-chain (full Node)
    uint8 public constant LARGE_DIVISOR = 1;

    // part of Node for Medium Test Skale-chain (1/4 of Node)
    uint8 public constant MEDIUM_TEST_DIVISOR = 4;

    // typically number of Nodes for Skale-chain (16 Nodes)
    uint public constant NUMBER_OF_NODES_FOR_SCHAIN = 16;

    // number of Nodes for Test Skale-chain (2 Nodes)
    uint public constant NUMBER_OF_NODES_FOR_TEST_SCHAIN = 2;

    // number of Nodes for Test Skale-chain (4 Nodes)
    uint public constant NUMBER_OF_NODES_FOR_MEDIUM_TEST_SCHAIN = 4;    

    // number of seconds in one year
    uint32 public constant SECONDS_TO_YEAR = 31622400;

    // initial number of monitors
    uint public constant NUMBER_OF_MONITORS = 24;

    uint public constant OPTIMAL_LOAD_PERCENTAGE = 80;

    uint public constant ADJUSTMENT_SPEED = 1000;

    uint public constant COOLDOWN_TIME = 60;

    uint public constant MIN_PRICE = 10**6;

    uint public constant MSR_REDUCING_COEFFICIENT = 2;

    uint public constant DOWNTIME_THRESHOLD_PART = 30;

    uint public constant BOUNTY_LOCKUP_MONTHS = 2;

    uint public constant ALRIGHT_DELTA = 134161;
    uint public constant BROADCAST_DELTA = 177490;
    uint public constant COMPLAINT_BAD_DATA_DELTA = 80995;
    uint public constant PRE_RESPONSE_DELTA = 100061;
    uint public constant COMPLAINT_DELTA = 104611;
    uint public constant RESPONSE_DELTA = 49132;

    // MSR - Minimum staking requirement
    uint public msr;

    // Reward period - 30 days (each 30 days Node would be granted for bounty)
    uint32 public rewardPeriod;

    // Allowable latency - 150000 ms by default
    uint32 public allowableLatency;

    /**
     * Delta period - 1 hour (1 hour before Reward period became Monitors need
     * to send Verdicts and 1 hour after Reward period became Node need to come
     * and get Bounty)
     */
    uint32 public deltaPeriod;

    /**
     * Check time - 2 minutes (every 2 minutes monitors should check metrics
     * from checked nodes)
     */
    uint public checkTime;

    //Need to add minimal allowed parameters for verdicts

    uint public launchTimestamp;

    uint public rotationDelay;

    uint public proofOfUseLockUpPeriodDays;

    uint public proofOfUseDelegationPercentage;

    uint public limitValidatorsPerDelegator;

    uint256 public firstDelegationsMonth; // deprecated

    // date when schains will be allowed for creation
    uint public schainCreationTimeStamp;

    uint public minimalSchainLifetime;

    uint public complaintTimeLimit;

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

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

    /**
     * @dev Allows the Owner to set new reward and delta periods
     * This function is only for tests.
     */
    function setPeriods(uint32 newRewardPeriod, uint32 newDeltaPeriod) external override onlyConstantsHolderManager {
        require(
            newRewardPeriod >= newDeltaPeriod && newRewardPeriod - newDeltaPeriod >= checkTime,
            "Incorrect Periods"
        );
        emit ConstantUpdated(
            keccak256(abi.encodePacked("RewardPeriod")),
            uint(rewardPeriod),
            uint(newRewardPeriod)
        );
        rewardPeriod = newRewardPeriod;
        emit ConstantUpdated(
            keccak256(abi.encodePacked("DeltaPeriod")),
            uint(deltaPeriod),
            uint(newDeltaPeriod)
        );
        deltaPeriod = newDeltaPeriod;
    }

    /**
     * @dev Allows the Owner to set the new check time.
     * This function is only for tests.
     */
    function setCheckTime(uint newCheckTime) external override onlyConstantsHolderManager {
        require(rewardPeriod - deltaPeriod >= checkTime, "Incorrect check time");
        emit ConstantUpdated(
            keccak256(abi.encodePacked("CheckTime")),
            uint(checkTime),
            uint(newCheckTime)
        );
        checkTime = newCheckTime;
    }    

    /**
     * @dev Allows the Owner to set the allowable latency in milliseconds.
     * This function is only for testing purposes.
     */
    function setLatency(uint32 newAllowableLatency) external override onlyConstantsHolderManager {
        emit ConstantUpdated(
            keccak256(abi.encodePacked("AllowableLatency")),
            uint(allowableLatency),
            uint(newAllowableLatency)
        );
        allowableLatency = newAllowableLatency;
    }

    /**
     * @dev Allows the Owner to set the minimum stake requirement.
     */
    function setMSR(uint newMSR) external override onlyConstantsHolderManager {
        emit ConstantUpdated(
            keccak256(abi.encodePacked("MSR")),
            uint(msr),
            uint(newMSR)
        );
        msr = newMSR;
    }

    /**
     * @dev Allows the Owner to set the launch timestamp.
     */
    function setLaunchTimestamp(uint timestamp) external override onlyConstantsHolderManager {
        require(
            block.timestamp < launchTimestamp,
            "Cannot set network launch timestamp because network is already launched"
        );
        emit ConstantUpdated(
            keccak256(abi.encodePacked("LaunchTimestamp")),
            uint(launchTimestamp),
            uint(timestamp)
        );
        launchTimestamp = timestamp;
    }

    /**
     * @dev Allows the Owner to set the node rotation delay.
     */
    function setRotationDelay(uint newDelay) external override onlyConstantsHolderManager {
        emit ConstantUpdated(
            keccak256(abi.encodePacked("RotationDelay")),
            uint(rotationDelay),
            uint(newDelay)
        );
        rotationDelay = newDelay;
    }

    /**
     * @dev Allows the Owner to set the proof-of-use lockup period.
     */
    function setProofOfUseLockUpPeriod(uint periodDays) external override onlyConstantsHolderManager {
        emit ConstantUpdated(
            keccak256(abi.encodePacked("ProofOfUseLockUpPeriodDays")),
            uint(proofOfUseLockUpPeriodDays),
            uint(periodDays)
        );
        proofOfUseLockUpPeriodDays = periodDays;
    }

    /**
     * @dev Allows the Owner to set the proof-of-use delegation percentage
     * requirement.
     */
    function setProofOfUseDelegationPercentage(uint percentage) external override onlyConstantsHolderManager {
        require(percentage <= 100, "Percentage value is incorrect");
        emit ConstantUpdated(
            keccak256(abi.encodePacked("ProofOfUseDelegationPercentage")),
            uint(proofOfUseDelegationPercentage),
            uint(percentage)
        );
        proofOfUseDelegationPercentage = percentage;
    }

    /**
     * @dev Allows the Owner to set the maximum number of validators that a
     * single delegator can delegate to.
     */
    function setLimitValidatorsPerDelegator(uint newLimit) external override onlyConstantsHolderManager {
        emit ConstantUpdated(
            keccak256(abi.encodePacked("LimitValidatorsPerDelegator")),
            uint(limitValidatorsPerDelegator),
            uint(newLimit)
        );
        limitValidatorsPerDelegator = newLimit;
    }

    function setSchainCreationTimeStamp(uint timestamp) external override onlyConstantsHolderManager {
        emit ConstantUpdated(
            keccak256(abi.encodePacked("SchainCreationTimeStamp")),
            uint(schainCreationTimeStamp),
            uint(timestamp)
        );
        schainCreationTimeStamp = timestamp;
    }

    function setMinimalSchainLifetime(uint lifetime) external override onlyConstantsHolderManager {
        emit ConstantUpdated(
            keccak256(abi.encodePacked("MinimalSchainLifetime")),
            uint(minimalSchainLifetime),
            uint(lifetime)
        );
        minimalSchainLifetime = lifetime;
    }

    function setComplaintTimeLimit(uint timeLimit) external override onlyConstantsHolderManager {
        emit ConstantUpdated(
            keccak256(abi.encodePacked("ComplaintTimeLimit")),
            uint(complaintTimeLimit),
            uint(timeLimit)
        );
        complaintTimeLimit = timeLimit;
    }

    function initialize(address contractsAddress) public override initializer {
        Permissions.initialize(contractsAddress);

        msr = 0;
        rewardPeriod = 2592000;
        allowableLatency = 150000;
        deltaPeriod = 3600;
        checkTime = 300;
        launchTimestamp = type(uint).max;
        rotationDelay = 12 hours;
        proofOfUseLockUpPeriodDays = 90;
        proofOfUseDelegationPercentage = 50;
        limitValidatorsPerDelegator = 20;
        firstDelegationsMonth = 0;
        complaintTimeLimit = 1800;
    }
}

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

/*
    MathUtils.sol - SKALE Manager
    Copyright (C) 2018-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;


library MathUtils {

    uint constant private _EPS = 1e6;

    event UnderflowError(
        uint a,
        uint b
    );    

    function boundedSub(uint256 a, uint256 b) internal returns (uint256) {
        if (a >= b) {
            return a - b;
        } else {
            emit UnderflowError(a, b);
            return 0;
        }
    }

    function boundedSubWithoutEvent(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a >= b) {
            return a - b;
        } else {
            return 0;
        }
    }

    function muchGreater(uint256 a, uint256 b) internal pure returns (bool) {
        assert(type(uint).max - _EPS > b);
        return a > b + _EPS;
    }

    function approximatelyEqual(uint256 a, uint256 b) internal pure returns (bool) {
        if (a > b) {
            return a - b < _EPS;
        } else {
            return b - a < _EPS;
        }
    }
}

// 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);
            }
        }
    }
}

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

/*
    IConstantsHolder.sol - SKALE Manager Interfaces
    Copyright (C) 2021-Present SKALE Labs
    @author Artem Payvin

    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 IConstantsHolder {

    /**
     * @dev Emitted when constants updated.
     */
    event ConstantUpdated(
        bytes32 indexed constantHash,
        uint previousValue,
        uint newValue
    );

    function setPeriods(uint32 newRewardPeriod, uint32 newDeltaPeriod) external;
    function setCheckTime(uint newCheckTime) external;
    function setLatency(uint32 newAllowableLatency) external;
    function setMSR(uint newMSR) external;
    function setLaunchTimestamp(uint timestamp) external;
    function setRotationDelay(uint newDelay) external;
    function setProofOfUseLockUpPeriod(uint periodDays) external;
    function setProofOfUseDelegationPercentage(uint percentage) external;
    function setLimitValidatorsPerDelegator(uint newLimit) external;
    function setSchainCreationTimeStamp(uint timestamp) external;
    function setMinimalSchainLifetime(uint lifetime) external;
    function setComplaintTimeLimit(uint timeLimit) external;
    function msr() external view returns (uint);
    function launchTimestamp() external view returns (uint);
    function rotationDelay() external view returns (uint);
    function limitValidatorsPerDelegator() external view returns (uint);
    function schainCreationTimeStamp() external view returns (uint);
    function minimalSchainLifetime() external view returns (uint);
    function complaintTimeLimit() external view returns (uint);
}

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

• No Contract Security Audit Submitted- Submit Audit Here

[{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"validatorId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"BountyWasPaid","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"}],"name":"RoleGranted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"}],"name":"RoleRevoked","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"holder","type":"address"},{"indexed":false,"internalType":"uint256","name":"validatorId","type":"uint256"},{"indexed":false,"internalType":"address","name":"destination","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"WithdrawBounty","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"validatorId","type":"uint256"},{"indexed":false,"internalType":"address","name":"destination","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"WithdrawFee","type":"event"},{"inputs":[],"name":"DEFAULT_ADMIN_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"contractManager","outputs":[{"internalType":"contract IContractManager","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"validatorId","type":"uint256"}],"name":"getAndUpdateEarnedBountyAmount","outputs":[{"internalType":"uint256","name":"earned","type":"uint256"},{"internalType":"uint256","name":"endMonth","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"wallet","type":"address"},{"internalType":"uint256","name":"validatorId","type":"uint256"}],"name":"getAndUpdateEarnedBountyAmountOf","outputs":[{"internalType":"uint256","name":"earned","type":"uint256"},{"internalType":"uint256","name":"endMonth","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"getEarnedFeeAmount","outputs":[{"internalType":"uint256","name":"earned","type":"uint256"},{"internalType":"uint256","name":"endMonth","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"validatorId","type":"uint256"}],"name":"getEarnedFeeAmountOf","outputs":[{"internalType":"uint256","name":"earned","type":"uint256"},{"internalType":"uint256","name":"endMonth","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"}],"name":"getRoleAdmin","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"uint256","name":"index","type":"uint256"}],"name":"getRoleMember","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"}],"name":"getRoleMemberCount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"grantRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"hasRole","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"contractsAddress","type":"address"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"renounceRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"revokeRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"bytes","name":"userData","type":"bytes"},{"internalType":"bytes","name":"","type":"bytes"}],"name":"tokensReceived","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"validatorId","type":"uint256"},{"internalType":"address","name":"to","type":"address"}],"name":"withdrawBounty","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"}],"name":"withdrawFee","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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