Contract 0x8Ff3148CE574B8e135130065B188960bA93799c6

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

pragma solidity ^0.8.0;

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

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

    mapping(bytes32 => RoleData) private _roles;

    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;

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

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

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

    /**
     * @dev Revert with a standard message if `account` is missing `role`.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     */
    function _checkRole(bytes32 role, address account) internal view {
        if (!hasRole(role, account)) {
            revert(
                string(
                    abi.encodePacked(
                        "AccessControl: account ",
                        Strings.toHexString(uint160(account), 20),
                        " is missing role ",
                        Strings.toHexString(uint256(role), 32)
                    )
                )
            );
        }
    }

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

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

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

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

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

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

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

pragma solidity ^0.8.0;

import "./IAccessControlEnumerable.sol";
import "./AccessControl.sol";
import "../utils/structs/EnumerableSet.sol";

/**
 * @dev Extension of {AccessControl} that allows enumerating the members of each role.
 */
abstract contract AccessControlEnumerable is IAccessControlEnumerable, AccessControl {
    using EnumerableSet for EnumerableSet.AddressSet;

    mapping(bytes32 => EnumerableSet.AddressSet) private _roleMembers;

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

    /**
     * @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 _roleMembers[role].at(index);
    }

    /**
     * @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 _roleMembers[role].length();
    }

    /**
     * @dev Overload {_grantRole} to track enumerable memberships
     */
    function _grantRole(bytes32 role, address account) internal virtual override {
        super._grantRole(role, account);
        _roleMembers[role].add(account);
    }

    /**
     * @dev Overload {_revokeRole} to track enumerable memberships
     */
    function _revokeRole(bytes32 role, address account) internal virtual override {
        super._revokeRole(role, account);
        _roleMembers[role].remove(account);
    }
}

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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

pragma solidity ^0.8.0;

import "./IAccessControl.sol";

/**
 * @dev External interface of AccessControlEnumerable declared to support ERC165 detection.
 */
interface IAccessControlEnumerable is IAccessControl {
    /**
     * @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) external view returns (address);

    /**
     * @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) external view returns (uint256);
}

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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

pragma solidity ^0.8.0;

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

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

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

pragma solidity ^0.8.0;

import "./Address.sol";

/**
 * @dev Provides a function to batch together multiple calls in a single external call.
 *
 * _Available since v4.1._
 */
abstract contract Multicall {
    /**
     * @dev Receives and executes a batch of function calls on this contract.
     */
    function multicall(bytes[] calldata data) external returns (bytes[] memory results) {
        results = new bytes[](data.length);
        for (uint256 i = 0; i < data.length; i++) {
            results[i] = Address.functionDelegateCall(address(this), data[i]);
        }
        return results;
    }
}

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

pragma solidity ^0.8.0;

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

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

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

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

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

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

pragma solidity ^0.8.0;

import "./IERC165.sol";

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

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

pragma solidity ^0.8.0;

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (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 EnumerableSet {
    // To implement this library for multiple types with as little code
    // repetition as possible, we write it in terms of a generic Set type with
    // bytes32 values.
    // The Set implementation uses private functions, and user-facing
    // implementations (such as AddressSet) are just wrappers around the
    // underlying Set.
    // This means that we can only create new EnumerableSets for types that fit
    // in bytes32.

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

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

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

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

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

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

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

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

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

            return true;
        } else {
            return false;
        }
    }

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

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

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

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

    // Bytes32Set

    struct Bytes32Set {
        Set _inner;
    }

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

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

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

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

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

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(Bytes32Set storage set) internal view returns (bytes32[] memory) {
        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: BSL-1.1
pragma solidity 0.8.9;

import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165.sol";
import "@openzeppelin/contracts/utils/Multicall.sol";
import "./interfaces/IProtocolGovernance.sol";
import "./libraries/ExceptionsLibrary.sol";
import "./UnitPricesGovernance.sol";
import "./utils/ContractMeta.sol";

/// @notice Governance that manages all params common for Mellow Permissionless Vaults protocol.
contract ProtocolGovernance is ContractMeta, IProtocolGovernance, ERC165, UnitPricesGovernance, Multicall {
    using EnumerableSet for EnumerableSet.AddressSet;

    uint256 public constant MAX_GOVERNANCE_DELAY = 7 days;
    uint256 public constant MIN_WITHDRAW_LIMIT = 200_000;

    /// @inheritdoc IProtocolGovernance
    mapping(address => uint256) public stagedPermissionGrantsTimestamps;
    /// @inheritdoc IProtocolGovernance
    mapping(address => uint256) public stagedPermissionGrantsMasks;
    /// @inheritdoc IProtocolGovernance
    mapping(address => uint256) public permissionMasks;

    /// @inheritdoc IProtocolGovernance
    mapping(address => uint256) public stagedValidatorsTimestamps;
    /// @inheritdoc IProtocolGovernance
    mapping(address => address) public stagedValidators;
    /// @inheritdoc IProtocolGovernance
    mapping(address => address) public validators;

    /// @inheritdoc IProtocolGovernance
    uint256 public stagedParamsTimestamp;

    EnumerableSet.AddressSet private _stagedPermissionGrantsAddresses;
    EnumerableSet.AddressSet private _permissionAddresses;
    EnumerableSet.AddressSet private _validatorsAddresses;
    EnumerableSet.AddressSet private _stagedValidatorsAddresses;

    Params private _stagedParams;
    Params private _params;

    /// @notice Creates a new contract
    /// @param admin Initial admin of the contract
    constructor(address admin) UnitPricesGovernance(admin) {}

    // -------------------  EXTERNAL, VIEW  -------------------

    /// @inheritdoc IProtocolGovernance
    function stagedParams() public view returns (Params memory) {
        return _stagedParams;
    }

    /// @inheritdoc IProtocolGovernance
    function params() public view returns (Params memory) {
        return _params;
    }

    function stagedValidatorsAddresses() external view returns (address[] memory) {
        return _stagedValidatorsAddresses.values();
    }

    /// @inheritdoc IProtocolGovernance
    function validatorsAddresses() external view returns (address[] memory) {
        return _validatorsAddresses.values();
    }

    /// @inheritdoc IProtocolGovernance
    function validatorsAddress(uint256 i) external view returns (address) {
        return _validatorsAddresses.at(i);
    }

    /// @inheritdoc IProtocolGovernance
    function permissionAddresses() external view returns (address[] memory) {
        return _permissionAddresses.values();
    }

    /// @inheritdoc IProtocolGovernance
    function stagedPermissionGrantsAddresses() external view returns (address[] memory) {
        return _stagedPermissionGrantsAddresses.values();
    }

    /// @inheritdoc IProtocolGovernance
    function addressesByPermission(uint8 permissionId) external view returns (address[] memory addresses) {
        uint256 length = _permissionAddresses.length();
        addresses = new address[](length);
        uint256 addressesLength = 0;
        uint256 mask = 1 << permissionId;
        for (uint256 i = 0; i < length; i++) {
            address addr = _permissionAddresses.at(i);
            if (permissionMasks[addr] & mask != 0) {
                addresses[addressesLength] = addr;
                addressesLength++;
            }
        }
        // shrink to fit
        assembly {
            mstore(addresses, addressesLength)
        }
    }

    /// @inheritdoc IProtocolGovernance
    function hasPermission(address target, uint8 permissionId) external view returns (bool) {
        return ((permissionMasks[target] | _params.forceAllowMask) & (1 << (permissionId))) != 0;
    }

    /// @inheritdoc IProtocolGovernance
    function hasAllPermissions(address target, uint8[] calldata permissionIds) external view returns (bool) {
        uint256 submask = _permissionIdsToMask(permissionIds);
        uint256 mask = permissionMasks[target] | _params.forceAllowMask;
        return mask & submask == submask;
    }

    /// @inheritdoc IProtocolGovernance
    function maxTokensPerVault() external view returns (uint256) {
        return _params.maxTokensPerVault;
    }

    /// @inheritdoc IProtocolGovernance
    function governanceDelay() external view returns (uint256) {
        return _params.governanceDelay;
    }

    /// @inheritdoc IProtocolGovernance
    function protocolTreasury() external view returns (address) {
        return _params.protocolTreasury;
    }

    /// @inheritdoc IProtocolGovernance
    function forceAllowMask() external view returns (uint256) {
        return _params.forceAllowMask;
    }

    /// @inheritdoc IProtocolGovernance
    function withdrawLimit(address token) external view returns (uint256) {
        return _params.withdrawLimit * unitPrices[token];
    }

    function supportsInterface(bytes4 interfaceId)
        public
        view
        override(UnitPricesGovernance, IERC165, ERC165)
        returns (bool)
    {
        return (interfaceId == type(IProtocolGovernance).interfaceId) || super.supportsInterface(interfaceId);
    }

    // -------------------  EXTERNAL, MUTATING  -------------------

    /// @inheritdoc IProtocolGovernance
    function stageValidator(address target, address validator) external {
        _requireAdmin();
        require(
            target != address(0) &&
            validator != address(0), 
            ExceptionsLibrary.ADDRESS_ZERO
        );
        _stagedValidatorsAddresses.add(target);
        stagedValidators[target] = validator;
        uint256 at = block.timestamp + _params.governanceDelay;
        stagedValidatorsTimestamps[target] = at;
        emit ValidatorStaged(tx.origin, msg.sender, target, validator, at);
    }

    /// @inheritdoc IProtocolGovernance
    function rollbackStagedValidators() external {
        _requireAdmin();
        uint256 length = _stagedValidatorsAddresses.length();
        for (uint256 i; i != length; ++i) {
            address target = _stagedValidatorsAddresses.at(0);
            delete stagedValidators[target];
            delete stagedValidatorsTimestamps[target];
            _stagedValidatorsAddresses.remove(target);
        }
        emit AllStagedValidatorsRolledBack(tx.origin, msg.sender);
    }

    /// @inheritdoc IProtocolGovernance
    function commitValidator(address stagedAddress) external {
        _requireAdmin();
        uint256 stagedToCommitAt = stagedValidatorsTimestamps[stagedAddress];
        require(block.timestamp >= stagedToCommitAt, ExceptionsLibrary.TIMESTAMP);
        require(stagedToCommitAt != 0, ExceptionsLibrary.NULL);
        validators[stagedAddress] = stagedValidators[stagedAddress];
        _validatorsAddresses.add(stagedAddress);
        delete stagedValidators[stagedAddress];
        delete stagedValidatorsTimestamps[stagedAddress];
        _stagedValidatorsAddresses.remove(stagedAddress);
        emit ValidatorCommitted(tx.origin, msg.sender, stagedAddress);
    }

    /// @inheritdoc IProtocolGovernance
    function commitAllValidatorsSurpassedDelay() external returns (address[] memory addressesCommitted) {
        _requireAdmin();
        uint256 length = _stagedValidatorsAddresses.length();
        addressesCommitted = new address[](length);
        uint256 addressesCommittedLength;
        for (uint256 i; i != length;) {
            address stagedAddress = _stagedValidatorsAddresses.at(i);
            if (block.timestamp >= stagedValidatorsTimestamps[stagedAddress]) {
                validators[stagedAddress] = stagedValidators[stagedAddress];
                _validatorsAddresses.add(stagedAddress);
                delete stagedValidators[stagedAddress];
                delete stagedValidatorsTimestamps[stagedAddress];
                _stagedValidatorsAddresses.remove(stagedAddress);
                addressesCommitted[addressesCommittedLength] = stagedAddress;
                ++addressesCommittedLength;
                --length;
                emit ValidatorCommitted(tx.origin, msg.sender, stagedAddress);
            } else {
                ++i;
            }
        }
        assembly {
            mstore(addressesCommitted, addressesCommittedLength)
        }
    }

    /// @inheritdoc IProtocolGovernance
    function revokeValidator(address target) external {
        _requireAdmin();
        require(target != address(0), ExceptionsLibrary.NULL);
        delete validators[target];
        _validatorsAddresses.remove(target);
        emit ValidatorRevoked(tx.origin, msg.sender, target);
    }

    /// @inheritdoc IProtocolGovernance
    function rollbackStagedPermissionGrants() external {
        _requireAdmin();
        uint256 length = _stagedPermissionGrantsAddresses.length();
        for (uint256 i; i != length; ++i) {
            address target = _stagedPermissionGrantsAddresses.at(0);
            delete stagedPermissionGrantsMasks[target];
            delete stagedPermissionGrantsTimestamps[target];
            _stagedPermissionGrantsAddresses.remove(target);
        }
        emit AllStagedPermissionGrantsRolledBack(tx.origin, msg.sender);
    }

    /// @inheritdoc IProtocolGovernance
    function commitPermissionGrants(address stagedAddress) external {
        _requireAdmin();
        uint256 stagedToCommitAt = stagedPermissionGrantsTimestamps[stagedAddress];
        require(block.timestamp >= stagedToCommitAt, ExceptionsLibrary.TIMESTAMP);
        require(stagedToCommitAt != 0, ExceptionsLibrary.NULL);
        permissionMasks[stagedAddress] |= stagedPermissionGrantsMasks[stagedAddress];
        _permissionAddresses.add(stagedAddress);
        delete stagedPermissionGrantsMasks[stagedAddress];
        delete stagedPermissionGrantsTimestamps[stagedAddress];
        _stagedPermissionGrantsAddresses.remove(stagedAddress);
        emit PermissionGrantsCommitted(tx.origin, msg.sender, stagedAddress);
    }

    /// @inheritdoc IProtocolGovernance
    function commitAllPermissionGrantsSurpassedDelay() external returns (address[] memory addresses) {
        _requireAdmin();
        uint256 length = _stagedPermissionGrantsAddresses.length();
        uint256 addressesLeft = length;
        addresses = new address[](length);
        for (uint256 i; i != addressesLeft;) {
            address stagedAddress = _stagedPermissionGrantsAddresses.at(i);
            if (block.timestamp >= stagedPermissionGrantsTimestamps[stagedAddress]) {
                permissionMasks[stagedAddress] |= stagedPermissionGrantsMasks[stagedAddress];
                _permissionAddresses.add(stagedAddress);
                delete stagedPermissionGrantsMasks[stagedAddress];
                delete stagedPermissionGrantsTimestamps[stagedAddress];
                _stagedPermissionGrantsAddresses.remove(stagedAddress);
                addresses[length - addressesLeft] = stagedAddress;
                --addressesLeft;
                emit PermissionGrantsCommitted(tx.origin, msg.sender, stagedAddress);
            } else {
                ++i;
            }
        }
        length -= addressesLeft;
        assembly {
            mstore(addresses, length)
        }
    }

    /// @inheritdoc IProtocolGovernance
    function revokePermissions(address target, uint8[] calldata permissionIds) external {
        _requireAdmin();
        require(target != address(0), ExceptionsLibrary.NULL);
        uint256 diff = _permissionIdsToMask(permissionIds);
        uint256 currentMask = permissionMasks[target];
        uint256 newMask = currentMask & (~diff);
        permissionMasks[target] = newMask;
        if (newMask == 0) {
            _permissionAddresses.remove(target);
        }
        emit PermissionsRevoked(tx.origin, msg.sender, target, permissionIds);
    }

    /// @inheritdoc IProtocolGovernance
    function commitParams() external {
        _requireAdmin();
        require(stagedParamsTimestamp != 0, ExceptionsLibrary.NULL);
        require(
            block.timestamp >= stagedParamsTimestamp,
            ExceptionsLibrary.TIMESTAMP
        );
        _params = _stagedParams;
        delete _stagedParams;
        delete stagedParamsTimestamp;
        emit ParamsCommitted(tx.origin, msg.sender, _params);
    }

    /// @inheritdoc IProtocolGovernance
    function stagePermissionGrants(address target, uint8[] calldata permissionIds) external {
        _requireAdmin();
        require(target != address(0), ExceptionsLibrary.NULL);
        _stagedPermissionGrantsAddresses.add(target);
        stagedPermissionGrantsMasks[target] = _permissionIdsToMask(permissionIds);
        uint256 stagedToCommitAt = block.timestamp + _params.governanceDelay;
        stagedPermissionGrantsTimestamps[target] = stagedToCommitAt;
        emit PermissionGrantsStaged(tx.origin, msg.sender, target, permissionIds, stagedToCommitAt);
    }

    /// @inheritdoc IProtocolGovernance
    function stageParams(IProtocolGovernance.Params calldata newParams) external {
        _requireAdmin();
        _validateGovernanceParams(newParams);
        _stagedParams = newParams;
        stagedParamsTimestamp = block.timestamp + _params.governanceDelay;
        emit ParamsStaged(tx.origin, msg.sender, stagedParamsTimestamp, _stagedParams);
    }

    // -------------------------  INTERNAL, VIEW  ------------------------------

    function _contractName() internal pure override returns (bytes32) {
        return bytes32("ProtocolGovernance");
    }

    function _contractVersion() internal pure override returns (bytes32) {
        return bytes32("1.0.0");
    }

    function _validateGovernanceParams(IProtocolGovernance.Params calldata newParams) private pure {
        require(newParams.maxTokensPerVault != 0 && newParams.governanceDelay != 0, ExceptionsLibrary.NULL);
        require(newParams.governanceDelay <= MAX_GOVERNANCE_DELAY, ExceptionsLibrary.LIMIT_OVERFLOW);
        require(newParams.withdrawLimit >= MIN_WITHDRAW_LIMIT, ExceptionsLibrary.LIMIT_OVERFLOW);
    }

    function _permissionIdsToMask(uint8[] calldata permissionIds) private pure returns (uint256 mask) {
        for (uint256 i = 0; i < permissionIds.length; ++i) {
            mask |= 1 << permissionIds[i];
        }
    }

    // --------------------------  EVENTS  --------------------------

    /// @notice Emitted when validators are staged to be granted for specific address.
    /// @param origin Origin of the transaction (tx.origin)
    /// @param sender Sender of the call (msg.sender)
    /// @param target Target address
    /// @param validator Staged validator
    /// @param at Timestamp when the staged permissions could be committed
    event ValidatorStaged(
        address indexed origin,
        address indexed sender,
        address indexed target,
        address validator,
        uint256 at
    );

    /// @notice Validator revoked
    /// @param origin Origin of the transaction (tx.origin)
    /// @param sender Sender of the call (msg.sender)
    /// @param target Target address
    event ValidatorRevoked(address indexed origin, address indexed sender, address indexed target);

    /// @notice Emitted when staged validators are rolled back
    /// @param origin Origin of the transaction (tx.origin)
    /// @param sender Sender of the call (msg.sender)
    event AllStagedValidatorsRolledBack(address indexed origin, address indexed sender);

    /// @notice Emitted when staged validators are comitted for specific address
    /// @param origin Origin of the transaction (tx.origin)
    /// @param sender Sender of the call (msg.sender)
    /// @param target Target address
    event ValidatorCommitted(address indexed origin, address indexed sender, address indexed target);

    /// @notice Emitted when new permissions are staged to be granted for specific address.
    /// @param origin Origin of the transaction (tx.origin)
    /// @param sender Sender of the call (msg.sender)
    /// @param target Target address
    /// @param permissionIds Permission IDs to be granted
    /// @param at Timestamp when the staged permissions could be committed
    event PermissionGrantsStaged(
        address indexed origin,
        address indexed sender,
        address indexed target,
        uint8[] permissionIds,
        uint256 at
    );

    /// @notice Emitted when permissions are revoked
    /// @param origin Origin of the transaction (tx.origin)
    /// @param sender Sender of the call (msg.sender)
    /// @param target Target address
    /// @param permissionIds Permission IDs to be revoked
    event PermissionsRevoked(
        address indexed origin,
        address indexed sender,
        address indexed target,
        uint8[] permissionIds
    );

    /// @notice Emitted when staged permissions are rolled back
    /// @param origin Origin of the transaction (tx.origin)
    /// @param sender Sender of the call (msg.sender)
    event AllStagedPermissionGrantsRolledBack(address indexed origin, address indexed sender);

    /// @notice Emitted when staged permissions are comitted for specific address
    /// @param origin Origin of the transaction (tx.origin)
    /// @param sender Sender of the call (msg.sender)
    /// @param target Target address
    event PermissionGrantsCommitted(address indexed origin, address indexed sender, address indexed target);

    /// @notice Emitted when pending parameters are set
    /// @param origin Origin of the transaction (tx.origin)
    /// @param sender Sender of the call (msg.sender)
    /// @param at Timestamp when the pending parameters could be committed
    /// @param params Pending parameters
    event ParamsStaged(address indexed origin, address indexed sender, uint256 at, Params params);

    /// @notice Emitted when pending parameters are committed
    /// @param origin Origin of the transaction (tx.origin)
    /// @param sender Sender of the call (msg.sender)
    /// @param params Committed parameters
    event ParamsCommitted(address indexed origin, address indexed sender, Params params);
}

// SPDX-License-Identifier: BSL-1.1
pragma solidity 0.8.9;

import "./interfaces/IUnitPricesGovernance.sol";
import "./libraries/ExceptionsLibrary.sol";
import "./utils/DefaultAccessControl.sol";

contract UnitPricesGovernance is IUnitPricesGovernance, DefaultAccessControl {
    uint256 public constant DELAY = 14 days;
    /// @inheritdoc IUnitPricesGovernance
    mapping(address => uint256) public unitPrices;
    /// @inheritdoc IUnitPricesGovernance
    mapping(address => uint256) public stagedUnitPrices;
    /// @inheritdoc IUnitPricesGovernance
    mapping(address => uint256) public stagedUnitPricesTimestamps;

    constructor(address admin) DefaultAccessControl(admin) {}

    // -------------------  EXTERNAL, VIEW  -------------------

    /// @inheritdoc IERC165
    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(IERC165, AccessControlEnumerable)
        returns (bool)
    {
        return (interfaceId == type(IUnitPricesGovernance).interfaceId) || super.supportsInterface(interfaceId);
    }

    // -------------------  EXTERNAL, MUTATING  -------------------

    /// @inheritdoc IUnitPricesGovernance
    function stageUnitPrice(address token, uint256 value) external {
        require(token != address(0), ExceptionsLibrary.ADDRESS_ZERO);
        _requireAdmin();
        stagedUnitPrices[token] = value;
        stagedUnitPricesTimestamps[token] = unitPrices[token] == 0 ? block.timestamp : block.timestamp + DELAY;
        emit UnitPriceStaged(tx.origin, msg.sender, token, value);
    }

    /// @inheritdoc IUnitPricesGovernance
    function rollbackUnitPrice(address token) external {
        _requireAdmin();
        delete stagedUnitPrices[token];
        delete stagedUnitPricesTimestamps[token];
        emit UnitPriceRolledBack(tx.origin, msg.sender, token);
    }

    /// @inheritdoc IUnitPricesGovernance
    function commitUnitPrice(address token) external {
        _requireAdmin();
        uint256 timestamp = stagedUnitPricesTimestamps[token];
        require(timestamp != 0, ExceptionsLibrary.INVALID_STATE);
        require(timestamp <= block.timestamp, ExceptionsLibrary.TIMESTAMP);

        uint256 price = stagedUnitPrices[token];
        unitPrices[token] = price;
        delete stagedUnitPrices[token];
        delete stagedUnitPricesTimestamps[token];
        emit UnitPriceCommitted(tx.origin, msg.sender, token, price);
    }

    // --------------------------  EVENTS  --------------------------

    /// @notice UnitPrice staged for commit
    /// @param origin Origin of the transaction (tx.origin)
    /// @param sender Sender of the call (msg.sender)
    /// @param token Token address
    /// @param unitPrice Unit price
    event UnitPriceStaged(address indexed origin, address indexed sender, address token, uint256 unitPrice);

    /// @notice UnitPrice rolled back
    /// @param origin Origin of the transaction (tx.origin)
    /// @param sender Sender of the call (msg.sender)
    /// @param token Token address
    event UnitPriceRolledBack(address indexed origin, address indexed sender, address token);

    /// @notice UnitPrice committed
    /// @param origin Origin of the transaction (tx.origin)
    /// @param sender Sender of the call (msg.sender)
    /// @param token Token address
    /// @param unitPrice Unit price
    event UnitPriceCommitted(address indexed origin, address indexed sender, address token, uint256 unitPrice);
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.9;

import "./utils/IDefaultAccessControl.sol";
import "./IUnitPricesGovernance.sol";

interface IProtocolGovernance is IDefaultAccessControl, IUnitPricesGovernance {
    /// @notice CommonLibrary protocol params.
    /// @param maxTokensPerVault Max different token addresses that could be managed by the vault
    /// @param governanceDelay The delay (in secs) that must pass before setting new pending params to commiting them
    /// @param protocolTreasury The address that collects protocolFees, if protocolFee is not zero
    /// @param forceAllowMask If a permission bit is set in this mask it forces all addresses to have this permission as true
    /// @param withdrawLimit Withdraw limit (in unit prices, i.e. usd)
    struct Params {
        uint256 maxTokensPerVault;
        uint256 governanceDelay;
        address protocolTreasury;
        uint256 forceAllowMask;
        uint256 withdrawLimit;
    }

    // -------------------  EXTERNAL, VIEW  -------------------

    /// @notice Timestamp after which staged granted permissions for the given address can be committed.
    /// @param target The given address
    /// @return Zero if there are no staged permission grants, timestamp otherwise
    function stagedPermissionGrantsTimestamps(address target) external view returns (uint256);

    /// @notice Staged granted permission bitmask for the given address.
    /// @param target The given address
    /// @return Bitmask
    function stagedPermissionGrantsMasks(address target) external view returns (uint256);

    /// @notice Permission bitmask for the given address.
    /// @param target The given address
    /// @return Bitmask
    function permissionMasks(address target) external view returns (uint256);

    /// @notice Timestamp after which staged pending protocol parameters can be committed
    /// @return Zero if there are no staged parameters, timestamp otherwise.
    function stagedParamsTimestamp() external view returns (uint256);

    /// @notice Staged pending protocol parameters.
    function stagedParams() external view returns (Params memory);

    /// @notice Current protocol parameters.
    function params() external view returns (Params memory);

    /// @notice Addresses for which non-zero permissions are set.
    function permissionAddresses() external view returns (address[] memory);

    /// @notice Permission addresses staged for commit.
    function stagedPermissionGrantsAddresses() external view returns (address[] memory);

    /// @notice Return all addresses where rawPermissionMask bit for permissionId is set to 1.
    /// @param permissionId Id of the permission to check.
    /// @return A list of dirty addresses.
    function addressesByPermission(uint8 permissionId) external view returns (address[] memory);

    /// @notice Checks if address has permission or given permission is force allowed for any address.
    /// @param addr Address to check
    /// @param permissionId Permission to check
    function hasPermission(address addr, uint8 permissionId) external view returns (bool);

    /// @notice Checks if address has all permissions.
    /// @param target Address to check
    /// @param permissionIds A list of permissions to check
    function hasAllPermissions(address target, uint8[] calldata permissionIds) external view returns (bool);

    /// @notice Max different ERC20 token addresses that could be managed by the protocol.
    function maxTokensPerVault() external view returns (uint256);

    /// @notice The delay for committing any governance params.
    function governanceDelay() external view returns (uint256);

    /// @notice The address of the protocol treasury.
    function protocolTreasury() external view returns (address);

    /// @notice Permissions mask which defines if ordinary permission should be reverted.
    /// This bitmask is xored with ordinary mask.
    function forceAllowMask() external view returns (uint256);

    /// @notice Withdraw limit per token per block.
    /// @param token Address of the token
    /// @return Withdraw limit per token per block
    function withdrawLimit(address token) external view returns (uint256);

    /// @notice Addresses that has staged validators.
    function stagedValidatorsAddresses() external view returns (address[] memory);

    /// @notice Timestamp after which staged granted permissions for the given address can be committed.
    /// @param target The given address
    /// @return Zero if there are no staged permission grants, timestamp otherwise
    function stagedValidatorsTimestamps(address target) external view returns (uint256);

    /// @notice Staged validator for the given address.
    /// @param target The given address
    /// @return Validator
    function stagedValidators(address target) external view returns (address);

    /// @notice Addresses that has validators.
    function validatorsAddresses() external view returns (address[] memory);

    /// @notice Address that has validators.
    /// @param i The number of address
    /// @return Validator address
    function validatorsAddress(uint256 i) external view returns (address);

    /// @notice Validator for the given address.
    /// @param target The given address
    /// @return Validator
    function validators(address target) external view returns (address);

    // -------------------  EXTERNAL, MUTATING, GOVERNANCE, IMMEDIATE  -------------------

    /// @notice Rollback all staged validators.
    function rollbackStagedValidators() external;

    /// @notice Revoke validator instantly from the given address.
    /// @param target The given address
    function revokeValidator(address target) external;

    /// @notice Stages a new validator for the given address
    /// @param target The given address
    /// @param validator The validator for the given address
    function stageValidator(address target, address validator) external;

    /// @notice Commits validator for the given address.
    /// @dev Reverts if governance delay has not passed yet.
    /// @param target The given address.
    function commitValidator(address target) external;

    /// @notice Commites all staged validators for which governance delay passed
    /// @return Addresses for which validators were committed
    function commitAllValidatorsSurpassedDelay() external returns (address[] memory);

    /// @notice Rollback all staged granted permission grant.
    function rollbackStagedPermissionGrants() external;

    /// @notice Commits permission grants for the given address.
    /// @dev Reverts if governance delay has not passed yet.
    /// @param target The given address.
    function commitPermissionGrants(address target) external;

    /// @notice Commites all staged permission grants for which governance delay passed.
    /// @return An array of addresses for which permission grants were committed.
    function commitAllPermissionGrantsSurpassedDelay() external returns (address[] memory);

    /// @notice Revoke permission instantly from the given address.
    /// @param target The given address.
    /// @param permissionIds A list of permission ids to revoke.
    function revokePermissions(address target, uint8[] memory permissionIds) external;

    /// @notice Commits staged protocol params.
    /// Reverts if governance delay has not passed yet.
    function commitParams() external;

    // -------------------  EXTERNAL, MUTATING, GOVERNANCE, DELAY  -------------------

    /// @notice Sets new pending params that could have been committed after governance delay expires.
    /// @param newParams New protocol parameters to set.
    function stageParams(Params memory newParams) external;

    /// @notice Stage granted permissions that could have been committed after governance delay expires.
    /// Resets commit delay and permissions if there are already staged permissions for this address.
    /// @param target Target address
    /// @param permissionIds A list of permission ids to grant
    function stagePermissionGrants(address target, uint8[] memory permissionIds) external;
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.9;

import "@openzeppelin/contracts/utils/introspection/IERC165.sol";
import "./utils/IDefaultAccessControl.sol";

interface IUnitPricesGovernance is IDefaultAccessControl, IERC165 {
    // -------------------  EXTERNAL, VIEW  -------------------

    /// @notice Estimated amount of token worth 1 USD staged for commit.
    /// @param token Address of the token
    /// @return The amount of token
    function stagedUnitPrices(address token) external view returns (uint256);

    /// @notice Timestamp after which staged unit prices for the given token can be committed.
    /// @param token Address of the token
    /// @return Timestamp
    function stagedUnitPricesTimestamps(address token) external view returns (uint256);

    /// @notice Estimated amount of token worth 1 USD.
    /// @param token Address of the token
    /// @return The amount of token
    function unitPrices(address token) external view returns (uint256);

    // -------------------  EXTERNAL, MUTATING  -------------------

    /// @notice Stage estimated amount of token worth 1 USD staged for commit.
    /// @param token Address of the token
    /// @param value The amount of token
    function stageUnitPrice(address token, uint256 value) external;

    /// @notice Reset staged value
    /// @param token Address of the token
    function rollbackUnitPrice(address token) external;

    /// @notice Commit staged unit price
    /// @param token Address of the token
    function commitUnitPrice(address token) external;
}

// SPDX-License-Identifier: BSL-1.1
pragma solidity 0.8.9;

interface IContractMeta {
    function contractName() external view returns (string memory);
    function contractNameBytes() external view returns (bytes32);

    function contractVersion() external view returns (string memory);
    function contractVersionBytes() external view returns (bytes32);
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.9;

import "@openzeppelin/contracts/access/IAccessControlEnumerable.sol";

interface IDefaultAccessControl is IAccessControlEnumerable {
    /// @notice Checks that the address is contract admin.
    /// @param who Address to check
    /// @return `true` if who is admin, `false` otherwise
    function isAdmin(address who) external view returns (bool);

    /// @notice Checks that the address is contract admin.
    /// @param who Address to check
    /// @return `true` if who is operator, `false` otherwise
    function isOperator(address who) external view returns (bool);
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.9;

/// @notice Exceptions stores project`s smart-contracts exceptions
library ExceptionsLibrary {
    string constant ADDRESS_ZERO = "AZ";
    string constant VALUE_ZERO = "VZ";
    string constant EMPTY_LIST = "EMPL";
    string constant NOT_FOUND = "NF";
    string constant INIT = "INIT";
    string constant DUPLICATE = "DUP";
    string constant NULL = "NULL";
    string constant TIMESTAMP = "TS";
    string constant FORBIDDEN = "FRB";
    string constant ALLOWLIST = "ALL";
    string constant LIMIT_OVERFLOW = "LIMO";
    string constant LIMIT_UNDERFLOW = "LIMU";
    string constant INVALID_VALUE = "INV";
    string constant INVARIANT = "INVA";
    string constant INVALID_TARGET = "INVTR";
    string constant INVALID_TOKEN = "INVTO";
    string constant INVALID_INTERFACE = "INVI";
    string constant INVALID_SELECTOR = "INVS";
    string constant INVALID_STATE = "INVST";
    string constant INVALID_LENGTH = "INVL";
    string constant LOCK = "LCKD";
    string constant DISABLED = "DIS";
}

// SPDX-License-Identifier: BSL-1.1
pragma solidity 0.8.9;

import "../interfaces/utils/IContractMeta.sol";

abstract contract ContractMeta is IContractMeta {
    // -------------------  EXTERNAL, VIEW  -------------------

    function contractName() external pure returns (string memory) {
        return _bytes32ToString(_contractName());
    }

    function contractNameBytes() external pure returns (bytes32) {
        return _contractName();
    }

    function contractVersion() external pure returns (string memory) {
        return _bytes32ToString(_contractVersion());
    }

    function contractVersionBytes() external pure returns (bytes32) {
        return _contractVersion();
    }

    // -------------------  INTERNAL, VIEW  -------------------

    function _contractName() internal pure virtual returns (bytes32);

    function _contractVersion() internal pure virtual returns (bytes32);

    function _bytes32ToString(bytes32 b) internal pure returns (string memory s) {
        s = new string(32);
        uint256 len = 32;
        for (uint256 i = 0; i < 32; ++i) {
            if (uint8(b[i]) == 0) {
                len = i;
                break;
            }
        }
        assembly {
            mstore(s, len)
            mstore(add(s, 0x20), b)
        }
    }
}

// SPDX-License-Identifier: BSL-1.1
pragma solidity 0.8.9;

import "@openzeppelin/contracts/access/AccessControlEnumerable.sol";
import "../interfaces/utils/IDefaultAccessControl.sol";
import "../libraries/ExceptionsLibrary.sol";

/// @notice This is a default access control with 3 roles:
///
/// - ADMIN: allowed to do anything
/// - ADMIN_DELEGATE: allowed to do anything except assigning ADMIN and ADMIN_DELEGATE roles
/// - OPERATOR: low-privileged role, generally keeper or some other bot
contract DefaultAccessControl is IDefaultAccessControl, AccessControlEnumerable {
    bytes32 public constant OPERATOR = keccak256("operator");
    bytes32 public constant ADMIN_ROLE = keccak256("admin");
    bytes32 public constant ADMIN_DELEGATE_ROLE = keccak256("admin_delegate");

    /// @notice Creates a new contract.
    /// @param admin Admin of the contract
    constructor(address admin) {
        require(admin != address(0), ExceptionsLibrary.ADDRESS_ZERO);

        _setupRole(OPERATOR, admin);
        _setupRole(ADMIN_ROLE, admin);

        _setRoleAdmin(ADMIN_ROLE, ADMIN_ROLE);
        _setRoleAdmin(ADMIN_DELEGATE_ROLE, ADMIN_ROLE);
        _setRoleAdmin(OPERATOR, ADMIN_DELEGATE_ROLE);
    }

    // -------------------------  EXTERNAL, VIEW  ------------------------------

    /// @notice Checks if the address is ADMIN or ADMIN_DELEGATE.
    /// @param sender Adddress to check
    /// @return `true` if sender is an admin, `false` otherwise
    function isAdmin(address sender) public view returns (bool) {
        return hasRole(ADMIN_ROLE, sender) || hasRole(ADMIN_DELEGATE_ROLE, sender);
    }

    /// @notice Checks if the address is OPERATOR.
    /// @param sender Adddress to check
    /// @return `true` if sender is an admin, `false` otherwise
    function isOperator(address sender) public view returns (bool) {
        return hasRole(OPERATOR, sender);
    }

    // -------------------------  INTERNAL, VIEW  ------------------------------

    function _requireAdmin() internal view {
        require(isAdmin(msg.sender), ExceptionsLibrary.FORBIDDEN);
    }

    function _requireAtLeastOperator() internal view {
        require(isAdmin(msg.sender) || isOperator(msg.sender), ExceptionsLibrary.FORBIDDEN);
    }
}

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

• No Contract Security Audit Submitted- Submit Audit Here

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