{"file_path":"MintableToken.sol","creation_status":"success","source_code":"// SPDX-License-Identifier: Apache-2.0\r\n// Sources flattened with hardhat v2.12.5 https://hardhat.org\r\n\r\n// File @openzeppelin/contracts-upgradeable/access/IAccessControlUpgradeable.sol@v4.8.1\r\n\r\n// OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol)\r\n\r\npragma solidity ^0.8.0;\r\n\r\n/**\r\n * @dev External interface of AccessControl declared to support ERC165 detection.\r\n */\r\ninterface IAccessControlUpgradeable {\r\n /**\r\n * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`\r\n *\r\n * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite\r\n * {RoleAdminChanged} not being emitted signaling this.\r\n *\r\n * _Available since v3.1._\r\n */\r\n event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);\r\n\r\n /**\r\n * @dev Emitted when `account` is granted `role`.\r\n *\r\n * `sender` is the account that originated the contract call, an admin role\r\n * bearer except when using {AccessControl-_setupRole}.\r\n */\r\n event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);\r\n\r\n /**\r\n * @dev Emitted when `account` is revoked `role`.\r\n *\r\n * `sender` is the account that originated the contract call:\r\n * - if using `revokeRole`, it is the admin role bearer\r\n * - if using `renounceRole`, it is the role bearer (i.e. `account`)\r\n */\r\n event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);\r\n\r\n /**\r\n * @dev Returns `true` if `account` has been granted `role`.\r\n */\r\n function hasRole(bytes32 role, address account) external view returns (bool);\r\n\r\n /**\r\n * @dev Returns the admin role that controls `role`. See {grantRole} and\r\n * {revokeRole}.\r\n *\r\n * To change a role's admin, use {AccessControl-_setRoleAdmin}.\r\n */\r\n function getRoleAdmin(bytes32 role) external view returns (bytes32);\r\n\r\n /**\r\n * @dev Grants `role` to `account`.\r\n *\r\n * If `account` had not been already granted `role`, emits a {RoleGranted}\r\n * event.\r\n *\r\n * Requirements:\r\n *\r\n * - the caller must have ``role``'s admin role.\r\n */\r\n function grantRole(bytes32 role, address account) external;\r\n\r\n /**\r\n * @dev Revokes `role` from `account`.\r\n *\r\n * If `account` had been granted `role`, emits a {RoleRevoked} event.\r\n *\r\n * Requirements:\r\n *\r\n * - the caller must have ``role``'s admin role.\r\n */\r\n function revokeRole(bytes32 role, address account) external;\r\n\r\n /**\r\n * @dev Revokes `role` from the calling account.\r\n *\r\n * Roles are often managed via {grantRole} and {revokeRole}: this function's\r\n * purpose is to provide a mechanism for accounts to lose their privileges\r\n * if they are compromised (such as when a trusted device is misplaced).\r\n *\r\n * If the calling account had been granted `role`, emits a {RoleRevoked}\r\n * event.\r\n *\r\n * Requirements:\r\n *\r\n * - the caller must be `account`.\r\n */\r\n function renounceRole(bytes32 role, address account) external;\r\n}\r\n\r\n\r\n// File @openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol@v4.8.1\r\n\r\n// OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol)\r\n\r\npragma solidity ^0.8.1;\r\n\r\n/**\r\n * @dev Collection of functions related to the address type\r\n */\r\nlibrary AddressUpgradeable {\r\n /**\r\n * @dev Returns true if `account` is a contract.\r\n *\r\n * [IMPORTANT]\r\n * ====\r\n * It is unsafe to assume that an address for which this function returns\r\n * false is an externally-owned account (EOA) and not a contract.\r\n *\r\n * Among others, `isContract` will return false for the following\r\n * types of addresses:\r\n *\r\n * - an externally-owned account\r\n * - a contract in construction\r\n * - an address where a contract will be created\r\n * - an address where a contract lived, but was destroyed\r\n * ====\r\n *\r\n * [IMPORTANT]\r\n * ====\r\n * You shouldn't rely on `isContract` to protect against flash loan attacks!\r\n *\r\n * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\r\n * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\r\n * constructor.\r\n * ====\r\n */\r\n function isContract(address account) internal view returns (bool) {\r\n // This method relies on extcodesize/address.code.length, which returns 0\r\n // for contracts in construction, since the code is only stored at the end\r\n // of the constructor execution.\r\n\r\n return account.code.length > 0;\r\n }\r\n\r\n /**\r\n * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\r\n * `recipient`, forwarding all available gas and reverting on errors.\r\n *\r\n * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\r\n * of certain opcodes, possibly making contracts go over the 2300 gas limit\r\n * imposed by `transfer`, making them unable to receive funds via\r\n * `transfer`. {sendValue} removes this limitation.\r\n *\r\n * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].\r\n *\r\n * IMPORTANT: because control is transferred to `recipient`, care must be\r\n * taken to not create reentrancy vulnerabilities. Consider using\r\n * {ReentrancyGuard} or the\r\n * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\r\n */\r\n function sendValue(address payable recipient, uint256 amount) internal {\r\n require(address(this).balance >= amount, \"Address: insufficient balance\");\r\n\r\n (bool success, ) = recipient.call{value: amount}(\"\");\r\n require(success, \"Address: unable to send value, recipient may have reverted\");\r\n }\r\n\r\n /**\r\n * @dev Performs a Solidity function call using a low level `call`. A\r\n * plain `call` is an unsafe replacement for a function call: use this\r\n * function instead.\r\n *\r\n * If `target` reverts with a revert reason, it is bubbled up by this\r\n * function (like regular Solidity function calls).\r\n *\r\n * Returns the raw returned data. To convert to the expected return value,\r\n * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\r\n *\r\n * Requirements:\r\n *\r\n * - `target` must be a contract.\r\n * - calling `target` with `data` must not revert.\r\n *\r\n * _Available since v3.1._\r\n */\r\n function functionCall(address target, bytes memory data) internal returns (bytes memory) {\r\n return functionCallWithValue(target, data, 0, \"Address: low-level call failed\");\r\n }\r\n\r\n /**\r\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\r\n * `errorMessage` as a fallback revert reason when `target` reverts.\r\n *\r\n * _Available since v3.1._\r\n */\r\n function functionCall(\r\n address target,\r\n bytes memory data,\r\n string memory errorMessage\r\n ) internal returns (bytes memory) {\r\n return functionCallWithValue(target, data, 0, errorMessage);\r\n }\r\n\r\n /**\r\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\r\n * but also transferring `value` wei to `target`.\r\n *\r\n * Requirements:\r\n *\r\n * - the calling contract must have an ETH balance of at least `value`.\r\n * - the called Solidity function must be `payable`.\r\n *\r\n * _Available since v3.1._\r\n */\r\n function functionCallWithValue(\r\n address target,\r\n bytes memory data,\r\n uint256 value\r\n ) internal returns (bytes memory) {\r\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\r\n }\r\n\r\n /**\r\n * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\r\n * with `errorMessage` as a fallback revert reason when `target` reverts.\r\n *\r\n * _Available since v3.1._\r\n */\r\n function functionCallWithValue(\r\n address target,\r\n bytes memory data,\r\n uint256 value,\r\n string memory errorMessage\r\n ) internal returns (bytes memory) {\r\n require(address(this).balance >= value, \"Address: insufficient balance for call\");\r\n (bool success, bytes memory returndata) = target.call{value: value}(data);\r\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\r\n }\r\n\r\n /**\r\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\r\n * but performing a static call.\r\n *\r\n * _Available since v3.3._\r\n */\r\n function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\r\n return functionStaticCall(target, data, \"Address: low-level static call failed\");\r\n }\r\n\r\n /**\r\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\r\n * but performing a static call.\r\n *\r\n * _Available since v3.3._\r\n */\r\n function functionStaticCall(\r\n address target,\r\n bytes memory data,\r\n string memory errorMessage\r\n ) internal view returns (bytes memory) {\r\n (bool success, bytes memory returndata) = target.staticcall(data);\r\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\r\n }\r\n\r\n /**\r\n * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling\r\n * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.\r\n *\r\n * _Available since v4.8._\r\n */\r\n function verifyCallResultFromTarget(\r\n address target,\r\n bool success,\r\n bytes memory returndata,\r\n string memory errorMessage\r\n ) internal view returns (bytes memory) {\r\n if (success) {\r\n if (returndata.length == 0) {\r\n // only check isContract if the call was successful and the return data is empty\r\n // otherwise we already know that it was a contract\r\n require(isContract(target), \"Address: call to non-contract\");\r\n }\r\n return returndata;\r\n } else {\r\n _revert(returndata, errorMessage);\r\n }\r\n }\r\n\r\n /**\r\n * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the\r\n * revert reason or using the provided one.\r\n *\r\n * _Available since v4.3._\r\n */\r\n function verifyCallResult(\r\n bool success,\r\n bytes memory returndata,\r\n string memory errorMessage\r\n ) internal pure returns (bytes memory) {\r\n if (success) {\r\n return returndata;\r\n } else {\r\n _revert(returndata, errorMessage);\r\n }\r\n }\r\n\r\n function _revert(bytes memory returndata, string memory errorMessage) private pure {\r\n // Look for revert reason and bubble it up if present\r\n if (returndata.length > 0) {\r\n // The easiest way to bubble the revert reason is using memory via assembly\r\n /// @solidity memory-safe-assembly\r\n assembly {\r\n let returndata_size := mload(returndata)\r\n revert(add(32, returndata), returndata_size)\r\n }\r\n } else {\r\n revert(errorMessage);\r\n }\r\n }\r\n}\r\n\r\n\r\n// File @openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol@v4.8.1\r\n\r\n// OpenZeppelin Contracts (last updated v4.8.1) (proxy/utils/Initializable.sol)\r\n\r\npragma solidity ^0.8.2;\r\n\r\n/**\r\n * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed\r\n * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an\r\n * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer\r\n * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.\r\n *\r\n * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be\r\n * reused. This mechanism prevents re-execution of each \"step\" but allows the creation of new initialization steps in\r\n * case an upgrade adds a module that needs to be initialized.\r\n *\r\n * For example:\r\n *\r\n * [.hljs-theme-light.nopadding]\r\n * ```\r\n * contract MyToken is ERC20Upgradeable {\r\n * function initialize() initializer public {\r\n * __ERC20_init(\"MyToken\", \"MTK\");\r\n * }\r\n * }\r\n * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {\r\n * function initializeV2() reinitializer(2) public {\r\n * __ERC20Permit_init(\"MyToken\");\r\n * }\r\n * }\r\n * ```\r\n *\r\n * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as\r\n * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.\r\n *\r\n * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure\r\n * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.\r\n *\r\n * [CAUTION]\r\n * ====\r\n * Avoid leaving a contract uninitialized.\r\n *\r\n * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation\r\n * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke\r\n * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:\r\n *\r\n * [.hljs-theme-light.nopadding]\r\n * ```\r\n * /// @custom:oz-upgrades-unsafe-allow constructor\r\n * constructor() {\r\n * _disableInitializers();\r\n * }\r\n * ```\r\n * ====\r\n */\r\nabstract contract Initializable {\r\n /**\r\n * @dev Indicates that the contract has been initialized.\r\n * @custom:oz-retyped-from bool\r\n */\r\n uint8 private _initialized;\r\n\r\n /**\r\n * @dev Indicates that the contract is in the process of being initialized.\r\n */\r\n bool private _initializing;\r\n\r\n /**\r\n * @dev Triggered when the contract has been initialized or reinitialized.\r\n */\r\n event Initialized(uint8 version);\r\n\r\n /**\r\n * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,\r\n * `onlyInitializing` functions can be used to initialize parent contracts.\r\n *\r\n * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a\r\n * constructor.\r\n *\r\n * Emits an {Initialized} event.\r\n */\r\n modifier initializer() {\r\n bool isTopLevelCall = !_initializing;\r\n require(\r\n (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1),\r\n \"Initializable: contract is already initialized\"\r\n );\r\n _initialized = 1;\r\n if (isTopLevelCall) {\r\n _initializing = true;\r\n }\r\n _;\r\n if (isTopLevelCall) {\r\n _initializing = false;\r\n emit Initialized(1);\r\n }\r\n }\r\n\r\n /**\r\n * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the\r\n * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be\r\n * used to initialize parent contracts.\r\n *\r\n * A reinitializer may be used after the original initialization step. This is essential to configure modules that\r\n * are added through upgrades and that require initialization.\r\n *\r\n * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`\r\n * cannot be nested. If one is invoked in the context of another, execution will revert.\r\n *\r\n * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in\r\n * a contract, executing them in the right order is up to the developer or operator.\r\n *\r\n * WARNING: setting the version to 255 will prevent any future reinitialization.\r\n *\r\n * Emits an {Initialized} event.\r\n */\r\n modifier reinitializer(uint8 version) {\r\n require(!_initializing && _initialized < version, \"Initializable: contract is already initialized\");\r\n _initialized = version;\r\n _initializing = true;\r\n _;\r\n _initializing = false;\r\n emit Initialized(version);\r\n }\r\n\r\n /**\r\n * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the\r\n * {initializer} and {reinitializer} modifiers, directly or indirectly.\r\n */\r\n modifier onlyInitializing() {\r\n require(_initializing, \"Initializable: contract is not initializing\");\r\n _;\r\n }\r\n\r\n /**\r\n * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.\r\n * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized\r\n * to any version. It is recommended to use this to lock implementation contracts that are designed to be called\r\n * through proxies.\r\n *\r\n * Emits an {Initialized} event the first time it is successfully executed.\r\n */\r\n function _disableInitializers() internal virtual {\r\n require(!_initializing, \"Initializable: contract is initializing\");\r\n if (_initialized < type(uint8).max) {\r\n _initialized = type(uint8).max;\r\n emit Initialized(type(uint8).max);\r\n }\r\n }\r\n\r\n /**\r\n * @dev Returns the highest version that has been initialized. See {reinitializer}.\r\n */\r\n function _getInitializedVersion() internal view returns (uint8) {\r\n return _initialized;\r\n }\r\n\r\n /**\r\n * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.\r\n */\r\n function _isInitializing() internal view returns (bool) {\r\n return _initializing;\r\n }\r\n}\r\n\r\n\r\n// File @openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol@v4.8.1\r\n\r\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\r\n\r\npragma solidity ^0.8.0;\r\n\r\n/**\r\n * @dev Provides information about the current execution context, including the\r\n * sender of the transaction and its data. While these are generally available\r\n * via msg.sender and msg.data, they should not be accessed in such a direct\r\n * manner, since when dealing with meta-transactions the account sending and\r\n * paying for execution may not be the actual sender (as far as an application\r\n * is concerned).\r\n *\r\n * This contract is only required for intermediate, library-like contracts.\r\n */\r\nabstract contract ContextUpgradeable is Initializable {\r\n function __Context_init() internal onlyInitializing {\r\n }\r\n\r\n function __Context_init_unchained() internal onlyInitializing {\r\n }\r\n function _msgSender() internal view virtual returns (address) {\r\n return msg.sender;\r\n }\r\n\r\n function _msgData() internal view virtual returns (bytes calldata) {\r\n return msg.data;\r\n }\r\n\r\n /**\r\n * @dev This empty reserved space is put in place to allow future versions to add new\r\n * variables without shifting down storage in the inheritance chain.\r\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\r\n */\r\n uint256[50] private __gap;\r\n}\r\n\r\n\r\n// File @openzeppelin/contracts-upgradeable/utils/introspection/IERC165Upgradeable.sol@v4.8.1\r\n\r\n// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)\r\n\r\npragma solidity ^0.8.0;\r\n\r\n/**\r\n * @dev Interface of the ERC165 standard, as defined in the\r\n * https://eips.ethereum.org/EIPS/eip-165[EIP].\r\n *\r\n * Implementers can declare support of contract interfaces, which can then be\r\n * queried by others ({ERC165Checker}).\r\n *\r\n * For an implementation, see {ERC165}.\r\n */\r\ninterface IERC165Upgradeable {\r\n /**\r\n * @dev Returns true if this contract implements the interface defined by\r\n * `interfaceId`. See the corresponding\r\n * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]\r\n * to learn more about how these ids are created.\r\n *\r\n * This function call must use less than 30 000 gas.\r\n */\r\n function supportsInterface(bytes4 interfaceId) external view returns (bool);\r\n}\r\n\r\n\r\n// File @openzeppelin/contracts-upgradeable/utils/introspection/ERC165Upgradeable.sol@v4.8.1\r\n\r\n// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)\r\n\r\npragma solidity ^0.8.0;\r\n\r\n\r\n/**\r\n * @dev Implementation of the {IERC165} interface.\r\n *\r\n * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check\r\n * for the additional interface id that will be supported. For example:\r\n *\r\n * ```solidity\r\n * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {\r\n * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);\r\n * }\r\n * ```\r\n *\r\n * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.\r\n */\r\nabstract contract ERC165Upgradeable is Initializable, IERC165Upgradeable {\r\n function __ERC165_init() internal onlyInitializing {\r\n }\r\n\r\n function __ERC165_init_unchained() internal onlyInitializing {\r\n }\r\n /**\r\n * @dev See {IERC165-supportsInterface}.\r\n */\r\n function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {\r\n return interfaceId == type(IERC165Upgradeable).interfaceId;\r\n }\r\n\r\n /**\r\n * @dev This empty reserved space is put in place to allow future versions to add new\r\n * variables without shifting down storage in the inheritance chain.\r\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\r\n */\r\n uint256[50] private __gap;\r\n}\r\n\r\n\r\n// File @openzeppelin/contracts-upgradeable/utils/math/MathUpgradeable.sol@v4.8.1\r\n\r\n// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/Math.sol)\r\n\r\npragma solidity ^0.8.0;\r\n\r\n/**\r\n * @dev Standard math utilities missing in the Solidity language.\r\n */\r\nlibrary MathUpgradeable {\r\n enum Rounding {\r\n Down, // Toward negative infinity\r\n Up, // Toward infinity\r\n Zero // Toward zero\r\n }\r\n\r\n /**\r\n * @dev Returns the largest of two numbers.\r\n */\r\n function max(uint256 a, uint256 b) internal pure returns (uint256) {\r\n return a > b ? a : b;\r\n }\r\n\r\n /**\r\n * @dev Returns the smallest of two numbers.\r\n */\r\n function min(uint256 a, uint256 b) internal pure returns (uint256) {\r\n return a < b ? a : b;\r\n }\r\n\r\n /**\r\n * @dev Returns the average of two numbers. The result is rounded towards\r\n * zero.\r\n */\r\n function average(uint256 a, uint256 b) internal pure returns (uint256) {\r\n // (a + b) / 2 can overflow.\r\n return (a & b) + (a ^ b) / 2;\r\n }\r\n\r\n /**\r\n * @dev Returns the ceiling of the division of two numbers.\r\n *\r\n * This differs from standard division with `/` in that it rounds up instead\r\n * of rounding down.\r\n */\r\n function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {\r\n // (a + b - 1) / b can overflow on addition, so we distribute.\r\n return a == 0 ? 0 : (a - 1) / b + 1;\r\n }\r\n\r\n /**\r\n * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0\r\n * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)\r\n * with further edits by Uniswap Labs also under MIT license.\r\n */\r\n function mulDiv(\r\n uint256 x,\r\n uint256 y,\r\n uint256 denominator\r\n ) internal pure returns (uint256 result) {\r\n unchecked {\r\n // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use\r\n // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256\r\n // variables such that product = prod1 * 2^256 + prod0.\r\n uint256 prod0; // Least significant 256 bits of the product\r\n uint256 prod1; // Most significant 256 bits of the product\r\n assembly {\r\n let mm := mulmod(x, y, not(0))\r\n prod0 := mul(x, y)\r\n prod1 := sub(sub(mm, prod0), lt(mm, prod0))\r\n }\r\n\r\n // Handle non-overflow cases, 256 by 256 division.\r\n if (prod1 == 0) {\r\n return prod0 / denominator;\r\n }\r\n\r\n // Make sure the result is less than 2^256. Also prevents denominator == 0.\r\n require(denominator > prod1);\r\n\r\n ///////////////////////////////////////////////\r\n // 512 by 256 division.\r\n ///////////////////////////////////////////////\r\n\r\n // Make division exact by subtracting the remainder from [prod1 prod0].\r\n uint256 remainder;\r\n assembly {\r\n // Compute remainder using mulmod.\r\n remainder := mulmod(x, y, denominator)\r\n\r\n // Subtract 256 bit number from 512 bit number.\r\n prod1 := sub(prod1, gt(remainder, prod0))\r\n prod0 := sub(prod0, remainder)\r\n }\r\n\r\n // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.\r\n // See https://cs.stackexchange.com/q/138556/92363.\r\n\r\n // Does not overflow because the denominator cannot be zero at this stage in the function.\r\n uint256 twos = denominator & (~denominator + 1);\r\n assembly {\r\n // Divide denominator by twos.\r\n denominator := div(denominator, twos)\r\n\r\n // Divide [prod1 prod0] by twos.\r\n prod0 := div(prod0, twos)\r\n\r\n // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.\r\n twos := add(div(sub(0, twos), twos), 1)\r\n }\r\n\r\n // Shift in bits from prod1 into prod0.\r\n prod0 |= prod1 * twos;\r\n\r\n // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such\r\n // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for\r\n // four bits. That is, denominator * inv = 1 mod 2^4.\r\n uint256 inverse = (3 * denominator) ^ 2;\r\n\r\n // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works\r\n // in modular arithmetic, doubling the correct bits in each step.\r\n inverse *= 2 - denominator * inverse; // inverse mod 2^8\r\n inverse *= 2 - denominator * inverse; // inverse mod 2^16\r\n inverse *= 2 - denominator * inverse; // inverse mod 2^32\r\n inverse *= 2 - denominator * inverse; // inverse mod 2^64\r\n inverse *= 2 - denominator * inverse; // inverse mod 2^128\r\n inverse *= 2 - denominator * inverse; // inverse mod 2^256\r\n\r\n // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.\r\n // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is\r\n // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1\r\n // is no longer required.\r\n result = prod0 * inverse;\r\n return result;\r\n }\r\n }\r\n\r\n /**\r\n * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.\r\n */\r\n function mulDiv(\r\n uint256 x,\r\n uint256 y,\r\n uint256 denominator,\r\n Rounding rounding\r\n ) internal pure returns (uint256) {\r\n uint256 result = mulDiv(x, y, denominator);\r\n if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {\r\n result += 1;\r\n }\r\n return result;\r\n }\r\n\r\n /**\r\n * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.\r\n *\r\n * Inspired by Henry S. Warren, Jr.'s \"Hacker's Delight\" (Chapter 11).\r\n */\r\n function sqrt(uint256 a) internal pure returns (uint256) {\r\n if (a == 0) {\r\n return 0;\r\n }\r\n\r\n // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.\r\n //\r\n // We know that the \"msb\" (most significant bit) of our target number `a` is a power of 2 such that we have\r\n // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.\r\n //\r\n // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`\r\n // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`\r\n // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`\r\n //\r\n // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.\r\n uint256 result = 1 << (log2(a) >> 1);\r\n\r\n // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,\r\n // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at\r\n // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision\r\n // into the expected uint128 result.\r\n unchecked {\r\n result = (result + a / result) >> 1;\r\n result = (result + a / result) >> 1;\r\n result = (result + a / result) >> 1;\r\n result = (result + a / result) >> 1;\r\n result = (result + a / result) >> 1;\r\n result = (result + a / result) >> 1;\r\n result = (result + a / result) >> 1;\r\n return min(result, a / result);\r\n }\r\n }\r\n\r\n /**\r\n * @notice Calculates sqrt(a), following the selected rounding direction.\r\n */\r\n function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {\r\n unchecked {\r\n uint256 result = sqrt(a);\r\n return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);\r\n }\r\n }\r\n\r\n /**\r\n * @dev Return the log in base 2, rounded down, of a positive value.\r\n * Returns 0 if given 0.\r\n */\r\n function log2(uint256 value) internal pure returns (uint256) {\r\n uint256 result = 0;\r\n unchecked {\r\n if (value >> 128 > 0) {\r\n value >>= 128;\r\n result += 128;\r\n }\r\n if (value >> 64 > 0) {\r\n value >>= 64;\r\n result += 64;\r\n }\r\n if (value >> 32 > 0) {\r\n value >>= 32;\r\n result += 32;\r\n }\r\n if (value >> 16 > 0) {\r\n value >>= 16;\r\n result += 16;\r\n }\r\n if (value >> 8 > 0) {\r\n value >>= 8;\r\n result += 8;\r\n }\r\n if (value >> 4 > 0) {\r\n value >>= 4;\r\n result += 4;\r\n }\r\n if (value >> 2 > 0) {\r\n value >>= 2;\r\n result += 2;\r\n }\r\n if (value >> 1 > 0) {\r\n result += 1;\r\n }\r\n }\r\n return result;\r\n }\r\n\r\n /**\r\n * @dev Return the log in base 2, following the selected rounding direction, of a positive value.\r\n * Returns 0 if given 0.\r\n */\r\n function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {\r\n unchecked {\r\n uint256 result = log2(value);\r\n return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);\r\n }\r\n }\r\n\r\n /**\r\n * @dev Return the log in base 10, rounded down, of a positive value.\r\n * Returns 0 if given 0.\r\n */\r\n function log10(uint256 value) internal pure returns (uint256) {\r\n uint256 result = 0;\r\n unchecked {\r\n if (value >= 10**64) {\r\n value /= 10**64;\r\n result += 64;\r\n }\r\n if (value >= 10**32) {\r\n value /= 10**32;\r\n result += 32;\r\n }\r\n if (value >= 10**16) {\r\n value /= 10**16;\r\n result += 16;\r\n }\r\n if (value >= 10**8) {\r\n value /= 10**8;\r\n result += 8;\r\n }\r\n if (value >= 10**4) {\r\n value /= 10**4;\r\n result += 4;\r\n }\r\n if (value >= 10**2) {\r\n value /= 10**2;\r\n result += 2;\r\n }\r\n if (value >= 10**1) {\r\n result += 1;\r\n }\r\n }\r\n return result;\r\n }\r\n\r\n /**\r\n * @dev Return the log in base 10, following the selected rounding direction, of a positive value.\r\n * Returns 0 if given 0.\r\n */\r\n function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {\r\n unchecked {\r\n uint256 result = log10(value);\r\n return result + (rounding == Rounding.Up && 10**result < value ? 1 : 0);\r\n }\r\n }\r\n\r\n /**\r\n * @dev Return the log in base 256, rounded down, of a positive value.\r\n * Returns 0 if given 0.\r\n *\r\n * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.\r\n */\r\n function log256(uint256 value) internal pure returns (uint256) {\r\n uint256 result = 0;\r\n unchecked {\r\n if (value >> 128 > 0) {\r\n value >>= 128;\r\n result += 16;\r\n }\r\n if (value >> 64 > 0) {\r\n value >>= 64;\r\n result += 8;\r\n }\r\n if (value >> 32 > 0) {\r\n value >>= 32;\r\n result += 4;\r\n }\r\n if (value >> 16 > 0) {\r\n value >>= 16;\r\n result += 2;\r\n }\r\n if (value >> 8 > 0) {\r\n result += 1;\r\n }\r\n }\r\n return result;\r\n }\r\n\r\n /**\r\n * @dev Return the log in base 10, following the selected rounding direction, of a positive value.\r\n * Returns 0 if given 0.\r\n */\r\n function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {\r\n unchecked {\r\n uint256 result = log256(value);\r\n return result + (rounding == Rounding.Up && 1 << (result * 8) < value ? 1 : 0);\r\n }\r\n }\r\n}\r\n\r\n\r\n// File @openzeppelin/contracts-upgradeable/utils/StringsUpgradeable.sol@v4.8.1\r\n\r\n// OpenZeppelin Contracts (last updated v4.8.0) (utils/Strings.sol)\r\n\r\npragma solidity ^0.8.0;\r\n\r\n/**\r\n * @dev String operations.\r\n */\r\nlibrary StringsUpgradeable {\r\n bytes16 private constant _SYMBOLS = \"0123456789abcdef\";\r\n uint8 private constant _ADDRESS_LENGTH = 20;\r\n\r\n /**\r\n * @dev Converts a `uint256` to its ASCII `string` decimal representation.\r\n */\r\n function toString(uint256 value) internal pure returns (string memory) {\r\n unchecked {\r\n uint256 length = MathUpgradeable.log10(value) + 1;\r\n string memory buffer = new string(length);\r\n uint256 ptr;\r\n /// @solidity memory-safe-assembly\r\n assembly {\r\n ptr := add(buffer, add(32, length))\r\n }\r\n while (true) {\r\n ptr--;\r\n /// @solidity memory-safe-assembly\r\n assembly {\r\n mstore8(ptr, byte(mod(value, 10), _SYMBOLS))\r\n }\r\n value /= 10;\r\n if (value == 0) break;\r\n }\r\n return buffer;\r\n }\r\n }\r\n\r\n /**\r\n * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.\r\n */\r\n function toHexString(uint256 value) internal pure returns (string memory) {\r\n unchecked {\r\n return toHexString(value, MathUpgradeable.log256(value) + 1);\r\n }\r\n }\r\n\r\n /**\r\n * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.\r\n */\r\n function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {\r\n bytes memory buffer = new bytes(2 * length + 2);\r\n buffer[0] = \"0\";\r\n buffer[1] = \"x\";\r\n for (uint256 i = 2 * length + 1; i > 1; --i) {\r\n buffer[i] = _SYMBOLS[value & 0xf];\r\n value >>= 4;\r\n }\r\n require(value == 0, \"Strings: hex length insufficient\");\r\n return string(buffer);\r\n }\r\n\r\n /**\r\n * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.\r\n */\r\n function toHexString(address addr) internal pure returns (string memory) {\r\n return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);\r\n }\r\n}\r\n\r\n\r\n// File @openzeppelin/contracts-upgradeable/access/AccessControlUpgradeable.sol@v4.8.1\r\n\r\n// OpenZeppelin Contracts (last updated v4.8.0) (access/AccessControl.sol)\r\n\r\npragma solidity ^0.8.0;\r\n\r\n\r\n\r\n\r\n\r\n/**\r\n * @dev Contract module that allows children to implement role-based access\r\n * control mechanisms. This is a lightweight version that doesn't allow enumerating role\r\n * members except through off-chain means by accessing the contract event logs. Some\r\n * applications may benefit from on-chain enumerability, for those cases see\r\n * {AccessControlEnumerable}.\r\n *\r\n * Roles are referred to by their `bytes32` identifier. These should be exposed\r\n * in the external API and be unique. The best way to achieve this is by\r\n * using `public constant` hash digests:\r\n *\r\n * ```\r\n * bytes32 public constant MY_ROLE = keccak256(\"MY_ROLE\");\r\n * ```\r\n *\r\n * Roles can be used to represent a set of permissions. To restrict access to a\r\n * function call, use {hasRole}:\r\n *\r\n * ```\r\n * function foo() public {\r\n * require(hasRole(MY_ROLE, msg.sender));\r\n * ...\r\n * }\r\n * ```\r\n *\r\n * Roles can be granted and revoked dynamically via the {grantRole} and\r\n * {revokeRole} functions. Each role has an associated admin role, and only\r\n * accounts that have a role's admin role can call {grantRole} and {revokeRole}.\r\n *\r\n * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means\r\n * that only accounts with this role will be able to grant or revoke other\r\n * roles. More complex role relationships can be created by using\r\n * {_setRoleAdmin}.\r\n *\r\n * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to\r\n * grant and revoke this role. Extra precautions should be taken to secure\r\n * accounts that have been granted it.\r\n */\r\nabstract contract AccessControlUpgradeable is Initializable, ContextUpgradeable, IAccessControlUpgradeable, ERC165Upgradeable {\r\n function __AccessControl_init() internal onlyInitializing {\r\n }\r\n\r\n function __AccessControl_init_unchained() internal onlyInitializing {\r\n }\r\n struct RoleData {\r\n mapping(address => bool) members;\r\n bytes32 adminRole;\r\n }\r\n\r\n mapping(bytes32 => RoleData) private _roles;\r\n\r\n bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;\r\n\r\n /**\r\n * @dev Modifier that checks that an account has a specific role. Reverts\r\n * with a standardized message including the required role.\r\n *\r\n * The format of the revert reason is given by the following regular expression:\r\n *\r\n * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/\r\n *\r\n * _Available since v4.1._\r\n */\r\n modifier onlyRole(bytes32 role) {\r\n _checkRole(role);\r\n _;\r\n }\r\n\r\n /**\r\n * @dev See {IERC165-supportsInterface}.\r\n */\r\n function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {\r\n return interfaceId == type(IAccessControlUpgradeable).interfaceId || super.supportsInterface(interfaceId);\r\n }\r\n\r\n /**\r\n * @dev Returns `true` if `account` has been granted `role`.\r\n */\r\n function hasRole(bytes32 role, address account) public view virtual override returns (bool) {\r\n return _roles[role].members[account];\r\n }\r\n\r\n /**\r\n * @dev Revert with a standard message if `_msgSender()` is missing `role`.\r\n * Overriding this function changes the behavior of the {onlyRole} modifier.\r\n *\r\n * Format of the revert message is described in {_checkRole}.\r\n *\r\n * _Available since v4.6._\r\n */\r\n function _checkRole(bytes32 role) internal view virtual {\r\n _checkRole(role, _msgSender());\r\n }\r\n\r\n /**\r\n * @dev Revert with a standard message if `account` is missing `role`.\r\n *\r\n * The format of the revert reason is given by the following regular expression:\r\n *\r\n * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/\r\n */\r\n function _checkRole(bytes32 role, address account) internal view virtual {\r\n if (!hasRole(role, account)) {\r\n revert(\r\n string(\r\n abi.encodePacked(\r\n \"AccessControl: account \",\r\n StringsUpgradeable.toHexString(account),\r\n \" is missing role \",\r\n StringsUpgradeable.toHexString(uint256(role), 32)\r\n )\r\n )\r\n );\r\n }\r\n }\r\n\r\n /**\r\n * @dev Returns the admin role that controls `role`. See {grantRole} and\r\n * {revokeRole}.\r\n *\r\n * To change a role's admin, use {_setRoleAdmin}.\r\n */\r\n function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) {\r\n return _roles[role].adminRole;\r\n }\r\n\r\n /**\r\n * @dev Grants `role` to `account`.\r\n *\r\n * If `account` had not been already granted `role`, emits a {RoleGranted}\r\n * event.\r\n *\r\n * Requirements:\r\n *\r\n * - the caller must have ``role``'s admin role.\r\n *\r\n * May emit a {RoleGranted} event.\r\n */\r\n function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {\r\n _grantRole(role, account);\r\n }\r\n\r\n /**\r\n * @dev Revokes `role` from `account`.\r\n *\r\n * If `account` had been granted `role`, emits a {RoleRevoked} event.\r\n *\r\n * Requirements:\r\n *\r\n * - the caller must have ``role``'s admin role.\r\n *\r\n * May emit a {RoleRevoked} event.\r\n */\r\n function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {\r\n _revokeRole(role, account);\r\n }\r\n\r\n /**\r\n * @dev Revokes `role` from the calling account.\r\n *\r\n * Roles are often managed via {grantRole} and {revokeRole}: this function's\r\n * purpose is to provide a mechanism for accounts to lose their privileges\r\n * if they are compromised (such as when a trusted device is misplaced).\r\n *\r\n * If the calling account had been revoked `role`, emits a {RoleRevoked}\r\n * event.\r\n *\r\n * Requirements:\r\n *\r\n * - the caller must be `account`.\r\n *\r\n * May emit a {RoleRevoked} event.\r\n */\r\n function renounceRole(bytes32 role, address account) public virtual override {\r\n require(account == _msgSender(), \"AccessControl: can only renounce roles for self\");\r\n\r\n _revokeRole(role, account);\r\n }\r\n\r\n /**\r\n * @dev Grants `role` to `account`.\r\n *\r\n * If `account` had not been already granted `role`, emits a {RoleGranted}\r\n * event. Note that unlike {grantRole}, this function doesn't perform any\r\n * checks on the calling account.\r\n *\r\n * May emit a {RoleGranted} event.\r\n *\r\n * [WARNING]\r\n * ====\r\n * This function should only be called from the constructor when setting\r\n * up the initial roles for the system.\r\n *\r\n * Using this function in any other way is effectively circumventing the admin\r\n * system imposed by {AccessControl}.\r\n * ====\r\n *\r\n * NOTE: This function is deprecated in favor of {_grantRole}.\r\n */\r\n function _setupRole(bytes32 role, address account) internal virtual {\r\n _grantRole(role, account);\r\n }\r\n\r\n /**\r\n * @dev Sets `adminRole` as ``role``'s admin role.\r\n *\r\n * Emits a {RoleAdminChanged} event.\r\n */\r\n function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {\r\n bytes32 previousAdminRole = getRoleAdmin(role);\r\n _roles[role].adminRole = adminRole;\r\n emit RoleAdminChanged(role, previousAdminRole, adminRole);\r\n }\r\n\r\n /**\r\n * @dev Grants `role` to `account`.\r\n *\r\n * Internal function without access restriction.\r\n *\r\n * May emit a {RoleGranted} event.\r\n */\r\n function _grantRole(bytes32 role, address account) internal virtual {\r\n if (!hasRole(role, account)) {\r\n _roles[role].members[account] = true;\r\n emit RoleGranted(role, account, _msgSender());\r\n }\r\n }\r\n\r\n /**\r\n * @dev Revokes `role` from `account`.\r\n *\r\n * Internal function without access restriction.\r\n *\r\n * May emit a {RoleRevoked} event.\r\n */\r\n function _revokeRole(bytes32 role, address account) internal virtual {\r\n if (hasRole(role, account)) {\r\n _roles[role].members[account] = false;\r\n emit RoleRevoked(role, account, _msgSender());\r\n }\r\n }\r\n\r\n /**\r\n * @dev This empty reserved space is put in place to allow future versions to add new\r\n * variables without shifting down storage in the inheritance chain.\r\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\r\n */\r\n uint256[49] private __gap;\r\n}\r\n\r\n\r\n// File @openzeppelin/contracts-upgradeable/access/IAccessControlEnumerableUpgradeable.sol@v4.8.1\r\n\r\n// OpenZeppelin Contracts v4.4.1 (access/IAccessControlEnumerable.sol)\r\n\r\npragma solidity ^0.8.0;\r\n\r\n/**\r\n * @dev External interface of AccessControlEnumerable declared to support ERC165 detection.\r\n */\r\ninterface IAccessControlEnumerableUpgradeable is IAccessControlUpgradeable {\r\n /**\r\n * @dev Returns one of the accounts that have `role`. `index` must be a\r\n * value between 0 and {getRoleMemberCount}, non-inclusive.\r\n *\r\n * Role bearers are not sorted in any particular way, and their ordering may\r\n * change at any point.\r\n *\r\n * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure\r\n * you perform all queries on the same block. See the following\r\n * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]\r\n * for more information.\r\n */\r\n function getRoleMember(bytes32 role, uint256 index) external view returns (address);\r\n\r\n /**\r\n * @dev Returns the number of accounts that have `role`. Can be used\r\n * together with {getRoleMember} to enumerate all bearers of a role.\r\n */\r\n function getRoleMemberCount(bytes32 role) external view returns (uint256);\r\n}\r\n\r\n\r\n// File @openzeppelin/contracts-upgradeable/utils/structs/EnumerableSetUpgradeable.sol@v4.8.1\r\n\r\n// OpenZeppelin Contracts (last updated v4.8.0) (utils/structs/EnumerableSet.sol)\r\n// This file was procedurally generated from scripts/generate/templates/EnumerableSet.js.\r\n\r\npragma solidity ^0.8.0;\r\n\r\n/**\r\n * @dev Library for managing\r\n * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive\r\n * types.\r\n *\r\n * Sets have the following properties:\r\n *\r\n * - Elements are added, removed, and checked for existence in constant time\r\n * (O(1)).\r\n * - Elements are enumerated in O(n). No guarantees are made on the ordering.\r\n *\r\n * ```\r\n * contract Example {\r\n * // Add the library methods\r\n * using EnumerableSet for EnumerableSet.AddressSet;\r\n *\r\n * // Declare a set state variable\r\n * EnumerableSet.AddressSet private mySet;\r\n * }\r\n * ```\r\n *\r\n * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)\r\n * and `uint256` (`UintSet`) are supported.\r\n *\r\n * [WARNING]\r\n * ====\r\n * Trying to delete such a structure from storage will likely result in data corruption, rendering the structure\r\n * unusable.\r\n * See https://github.com/ethereum/solidity/pull/11843[ethereum/solidity#11843] for more info.\r\n *\r\n * In order to clean an EnumerableSet, you can either remove all elements one by one or create a fresh instance using an\r\n * array of EnumerableSet.\r\n * ====\r\n */\r\nlibrary EnumerableSetUpgradeable {\r\n // To implement this library for multiple types with as little code\r\n // repetition as possible, we write it in terms of a generic Set type with\r\n // bytes32 values.\r\n // The Set implementation uses private functions, and user-facing\r\n // implementations (such as AddressSet) are just wrappers around the\r\n // underlying Set.\r\n // This means that we can only create new EnumerableSets for types that fit\r\n // in bytes32.\r\n\r\n struct Set {\r\n // Storage of set values\r\n bytes32[] _values;\r\n // Position of the value in the `values` array, plus 1 because index 0\r\n // means a value is not in the set.\r\n mapping(bytes32 => uint256) _indexes;\r\n }\r\n\r\n /**\r\n * @dev Add a value to a set. O(1).\r\n *\r\n * Returns true if the value was added to the set, that is if it was not\r\n * already present.\r\n */\r\n function _add(Set storage set, bytes32 value) private returns (bool) {\r\n if (!_contains(set, value)) {\r\n set._values.push(value);\r\n // The value is stored at length-1, but we add 1 to all indexes\r\n // and use 0 as a sentinel value\r\n set._indexes[value] = set._values.length;\r\n return true;\r\n } else {\r\n return false;\r\n }\r\n }\r\n\r\n /**\r\n * @dev Removes a value from a set. O(1).\r\n *\r\n * Returns true if the value was removed from the set, that is if it was\r\n * present.\r\n */\r\n function _remove(Set storage set, bytes32 value) private returns (bool) {\r\n // We read and store the value's index to prevent multiple reads from the same storage slot\r\n uint256 valueIndex = set._indexes[value];\r\n\r\n if (valueIndex != 0) {\r\n // Equivalent to contains(set, value)\r\n // To delete an element from the _values array in O(1), we swap the element to delete with the last one in\r\n // the array, and then remove the last element (sometimes called as 'swap and pop').\r\n // This modifies the order of the array, as noted in {at}.\r\n\r\n uint256 toDeleteIndex = valueIndex - 1;\r\n uint256 lastIndex = set._values.length - 1;\r\n\r\n if (lastIndex != toDeleteIndex) {\r\n bytes32 lastValue = set._values[lastIndex];\r\n\r\n // Move the last value to the index where the value to delete is\r\n set._values[toDeleteIndex] = lastValue;\r\n // Update the index for the moved value\r\n set._indexes[lastValue] = valueIndex; // Replace lastValue's index to valueIndex\r\n }\r\n\r\n // Delete the slot where the moved value was stored\r\n set._values.pop();\r\n\r\n // Delete the index for the deleted slot\r\n delete set._indexes[value];\r\n\r\n return true;\r\n } else {\r\n return false;\r\n }\r\n }\r\n\r\n /**\r\n * @dev Returns true if the value is in the set. O(1).\r\n */\r\n function _contains(Set storage set, bytes32 value) private view returns (bool) {\r\n return set._indexes[value] != 0;\r\n }\r\n\r\n /**\r\n * @dev Returns the number of values on the set. O(1).\r\n */\r\n function _length(Set storage set) private view returns (uint256) {\r\n return set._values.length;\r\n }\r\n\r\n /**\r\n * @dev Returns the value stored at position `index` in the set. O(1).\r\n *\r\n * Note that there are no guarantees on the ordering of values inside the\r\n * array, and it may change when more values are added or removed.\r\n *\r\n * Requirements:\r\n *\r\n * - `index` must be strictly less than {length}.\r\n */\r\n function _at(Set storage set, uint256 index) private view returns (bytes32) {\r\n return set._values[index];\r\n }\r\n\r\n /**\r\n * @dev Return the entire set in an array\r\n *\r\n * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed\r\n * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that\r\n * this function has an unbounded cost, and using it as part of a state-changing function may render the function\r\n * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.\r\n */\r\n function _values(Set storage set) private view returns (bytes32[] memory) {\r\n return set._values;\r\n }\r\n\r\n // Bytes32Set\r\n\r\n struct Bytes32Set {\r\n Set _inner;\r\n }\r\n\r\n /**\r\n * @dev Add a value to a set. O(1).\r\n *\r\n * Returns true if the value was added to the set, that is if it was not\r\n * already present.\r\n */\r\n function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {\r\n return _add(set._inner, value);\r\n }\r\n\r\n /**\r\n * @dev Removes a value from a set. O(1).\r\n *\r\n * Returns true if the value was removed from the set, that is if it was\r\n * present.\r\n */\r\n function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {\r\n return _remove(set._inner, value);\r\n }\r\n\r\n /**\r\n * @dev Returns true if the value is in the set. O(1).\r\n */\r\n function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {\r\n return _contains(set._inner, value);\r\n }\r\n\r\n /**\r\n * @dev Returns the number of values in the set. O(1).\r\n */\r\n function length(Bytes32Set storage set) internal view returns (uint256) {\r\n return _length(set._inner);\r\n }\r\n\r\n /**\r\n * @dev Returns the value stored at position `index` in the set. O(1).\r\n *\r\n * Note that there are no guarantees on the ordering of values inside the\r\n * array, and it may change when more values are added or removed.\r\n *\r\n * Requirements:\r\n *\r\n * - `index` must be strictly less than {length}.\r\n */\r\n function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {\r\n return _at(set._inner, index);\r\n }\r\n\r\n /**\r\n * @dev Return the entire set in an array\r\n *\r\n * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed\r\n * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that\r\n * this function has an unbounded cost, and using it as part of a state-changing function may render the function\r\n * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.\r\n */\r\n function values(Bytes32Set storage set) internal view returns (bytes32[] memory) {\r\n bytes32[] memory store = _values(set._inner);\r\n bytes32[] memory result;\r\n\r\n /// @solidity memory-safe-assembly\r\n assembly {\r\n result := store\r\n }\r\n\r\n return result;\r\n }\r\n\r\n // AddressSet\r\n\r\n struct AddressSet {\r\n Set _inner;\r\n }\r\n\r\n /**\r\n * @dev Add a value to a set. O(1).\r\n *\r\n * Returns true if the value was added to the set, that is if it was not\r\n * already present.\r\n */\r\n function add(AddressSet storage set, address value) internal returns (bool) {\r\n return _add(set._inner, bytes32(uint256(uint160(value))));\r\n }\r\n\r\n /**\r\n * @dev Removes a value from a set. O(1).\r\n *\r\n * Returns true if the value was removed from the set, that is if it was\r\n * present.\r\n */\r\n function remove(AddressSet storage set, address value) internal returns (bool) {\r\n return _remove(set._inner, bytes32(uint256(uint160(value))));\r\n }\r\n\r\n /**\r\n * @dev Returns true if the value is in the set. O(1).\r\n */\r\n function contains(AddressSet storage set, address value) internal view returns (bool) {\r\n return _contains(set._inner, bytes32(uint256(uint160(value))));\r\n }\r\n\r\n /**\r\n * @dev Returns the number of values in the set. O(1).\r\n */\r\n function length(AddressSet storage set) internal view returns (uint256) {\r\n return _length(set._inner);\r\n }\r\n\r\n /**\r\n * @dev Returns the value stored at position `index` in the set. O(1).\r\n *\r\n * Note that there are no guarantees on the ordering of values inside the\r\n * array, and it may change when more values are added or removed.\r\n *\r\n * Requirements:\r\n *\r\n * - `index` must be strictly less than {length}.\r\n */\r\n function at(AddressSet storage set, uint256 index) internal view returns (address) {\r\n return address(uint160(uint256(_at(set._inner, index))));\r\n }\r\n\r\n /**\r\n * @dev Return the entire set in an array\r\n *\r\n * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed\r\n * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that\r\n * this function has an unbounded cost, and using it as part of a state-changing function may render the function\r\n * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.\r\n */\r\n function values(AddressSet storage set) internal view returns (address[] memory) {\r\n bytes32[] memory store = _values(set._inner);\r\n address[] memory result;\r\n\r\n /// @solidity memory-safe-assembly\r\n assembly {\r\n result := store\r\n }\r\n\r\n return result;\r\n }\r\n\r\n // UintSet\r\n\r\n struct UintSet {\r\n Set _inner;\r\n }\r\n\r\n /**\r\n * @dev Add a value to a set. O(1).\r\n *\r\n * Returns true if the value was added to the set, that is if it was not\r\n * already present.\r\n */\r\n function add(UintSet storage set, uint256 value) internal returns (bool) {\r\n return _add(set._inner, bytes32(value));\r\n }\r\n\r\n /**\r\n * @dev Removes a value from a set. O(1).\r\n *\r\n * Returns true if the value was removed from the set, that is if it was\r\n * present.\r\n */\r\n function remove(UintSet storage set, uint256 value) internal returns (bool) {\r\n return _remove(set._inner, bytes32(value));\r\n }\r\n\r\n /**\r\n * @dev Returns true if the value is in the set. O(1).\r\n */\r\n function contains(UintSet storage set, uint256 value) internal view returns (bool) {\r\n return _contains(set._inner, bytes32(value));\r\n }\r\n\r\n /**\r\n * @dev Returns the number of values in the set. O(1).\r\n */\r\n function length(UintSet storage set) internal view returns (uint256) {\r\n return _length(set._inner);\r\n }\r\n\r\n /**\r\n * @dev Returns the value stored at position `index` in the set. O(1).\r\n *\r\n * Note that there are no guarantees on the ordering of values inside the\r\n * array, and it may change when more values are added or removed.\r\n *\r\n * Requirements:\r\n *\r\n * - `index` must be strictly less than {length}.\r\n */\r\n function at(UintSet storage set, uint256 index) internal view returns (uint256) {\r\n return uint256(_at(set._inner, index));\r\n }\r\n\r\n /**\r\n * @dev Return the entire set in an array\r\n *\r\n * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed\r\n * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that\r\n * this function has an unbounded cost, and using it as part of a state-changing function may render the function\r\n * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.\r\n */\r\n function values(UintSet storage set) internal view returns (uint256[] memory) {\r\n bytes32[] memory store = _values(set._inner);\r\n uint256[] memory result;\r\n\r\n /// @solidity memory-safe-assembly\r\n assembly {\r\n result := store\r\n }\r\n\r\n return result;\r\n }\r\n}\r\n\r\n\r\n// File @openzeppelin/contracts-upgradeable/access/AccessControlEnumerableUpgradeable.sol@v4.8.1\r\n\r\n// OpenZeppelin Contracts (last updated v4.5.0) (access/AccessControlEnumerable.sol)\r\n\r\npragma solidity ^0.8.0;\r\n\r\n\r\n\r\n\r\n/**\r\n * @dev Extension of {AccessControl} that allows enumerating the members of each role.\r\n */\r\nabstract contract AccessControlEnumerableUpgradeable is Initializable, IAccessControlEnumerableUpgradeable, AccessControlUpgradeable {\r\n function __AccessControlEnumerable_init() internal onlyInitializing {\r\n }\r\n\r\n function __AccessControlEnumerable_init_unchained() internal onlyInitializing {\r\n }\r\n using EnumerableSetUpgradeable for EnumerableSetUpgradeable.AddressSet;\r\n\r\n mapping(bytes32 => EnumerableSetUpgradeable.AddressSet) private _roleMembers;\r\n\r\n /**\r\n * @dev See {IERC165-supportsInterface}.\r\n */\r\n function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {\r\n return interfaceId == type(IAccessControlEnumerableUpgradeable).interfaceId || super.supportsInterface(interfaceId);\r\n }\r\n\r\n /**\r\n * @dev Returns one of the accounts that have `role`. `index` must be a\r\n * value between 0 and {getRoleMemberCount}, non-inclusive.\r\n *\r\n * Role bearers are not sorted in any particular way, and their ordering may\r\n * change at any point.\r\n *\r\n * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure\r\n * you perform all queries on the same block. See the following\r\n * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]\r\n * for more information.\r\n */\r\n function getRoleMember(bytes32 role, uint256 index) public view virtual override returns (address) {\r\n return _roleMembers[role].at(index);\r\n }\r\n\r\n /**\r\n * @dev Returns the number of accounts that have `role`. Can be used\r\n * together with {getRoleMember} to enumerate all bearers of a role.\r\n */\r\n function getRoleMemberCount(bytes32 role) public view virtual override returns (uint256) {\r\n return _roleMembers[role].length();\r\n }\r\n\r\n /**\r\n * @dev Overload {_grantRole} to track enumerable memberships\r\n */\r\n function _grantRole(bytes32 role, address account) internal virtual override {\r\n super._grantRole(role, account);\r\n _roleMembers[role].add(account);\r\n }\r\n\r\n /**\r\n * @dev Overload {_revokeRole} to track enumerable memberships\r\n */\r\n function _revokeRole(bytes32 role, address account) internal virtual override {\r\n super._revokeRole(role, account);\r\n _roleMembers[role].remove(account);\r\n }\r\n\r\n /**\r\n * @dev This empty reserved space is put in place to allow future versions to add new\r\n * variables without shifting down storage in the inheritance chain.\r\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\r\n */\r\n uint256[49] private __gap;\r\n}\r\n\r\n\r\n// File @openzeppelin/contracts-upgradeable/interfaces/draft-IERC1822Upgradeable.sol@v4.8.1\r\n\r\n// OpenZeppelin Contracts (last updated v4.5.0) (interfaces/draft-IERC1822.sol)\r\n\r\npragma solidity ^0.8.0;\r\n\r\n/**\r\n * @dev ERC1822: Universal Upgradeable Proxy Standard (UUPS) documents a method for upgradeability through a simplified\r\n * proxy whose upgrades are fully controlled by the current implementation.\r\n */\r\ninterface IERC1822ProxiableUpgradeable {\r\n /**\r\n * @dev Returns the storage slot that the proxiable contract assumes is being used to store the implementation\r\n * address.\r\n *\r\n * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks\r\n * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this\r\n * function revert if invoked through a proxy.\r\n */\r\n function proxiableUUID() external view returns (bytes32);\r\n}\r\n\r\n\r\n// File @openzeppelin/contracts-upgradeable/proxy/beacon/IBeaconUpgradeable.sol@v4.8.1\r\n\r\n// OpenZeppelin Contracts v4.4.1 (proxy/beacon/IBeacon.sol)\r\n\r\npragma solidity ^0.8.0;\r\n\r\n/**\r\n * @dev This is the interface that {BeaconProxy} expects of its beacon.\r\n */\r\ninterface IBeaconUpgradeable {\r\n /**\r\n * @dev Must return an address that can be used as a delegate call target.\r\n *\r\n * {BeaconProxy} will check that this address is a contract.\r\n */\r\n function implementation() external view returns (address);\r\n}\r\n\r\n\r\n// File @openzeppelin/contracts-upgradeable/utils/StorageSlotUpgradeable.sol@v4.8.1\r\n\r\n// OpenZeppelin Contracts (last updated v4.7.0) (utils/StorageSlot.sol)\r\n\r\npragma solidity ^0.8.0;\r\n\r\n/**\r\n * @dev Library for reading and writing primitive types to specific storage slots.\r\n *\r\n * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.\r\n * This library helps with reading and writing to such slots without the need for inline assembly.\r\n *\r\n * The functions in this library return Slot structs that contain a `value` member that can be used to read or write.\r\n *\r\n * Example usage to set ERC1967 implementation slot:\r\n * ```\r\n * contract ERC1967 {\r\n * bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;\r\n *\r\n * function _getImplementation() internal view returns (address) {\r\n * return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;\r\n * }\r\n *\r\n * function _setImplementation(address newImplementation) internal {\r\n * require(Address.isContract(newImplementation), \"ERC1967: new implementation is not a contract\");\r\n * StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;\r\n * }\r\n * }\r\n * ```\r\n *\r\n * _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._\r\n */\r\nlibrary StorageSlotUpgradeable {\r\n struct AddressSlot {\r\n address value;\r\n }\r\n\r\n struct BooleanSlot {\r\n bool value;\r\n }\r\n\r\n struct Bytes32Slot {\r\n bytes32 value;\r\n }\r\n\r\n struct Uint256Slot {\r\n uint256 value;\r\n }\r\n\r\n /**\r\n * @dev Returns an `AddressSlot` with member `value` located at `slot`.\r\n */\r\n function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {\r\n /// @solidity memory-safe-assembly\r\n assembly {\r\n r.slot := slot\r\n }\r\n }\r\n\r\n /**\r\n * @dev Returns an `BooleanSlot` with member `value` located at `slot`.\r\n */\r\n function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {\r\n /// @solidity memory-safe-assembly\r\n assembly {\r\n r.slot := slot\r\n }\r\n }\r\n\r\n /**\r\n * @dev Returns an `Bytes32Slot` with member `value` located at `slot`.\r\n */\r\n function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {\r\n /// @solidity memory-safe-assembly\r\n assembly {\r\n r.slot := slot\r\n }\r\n }\r\n\r\n /**\r\n * @dev Returns an `Uint256Slot` with member `value` located at `slot`.\r\n */\r\n function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {\r\n /// @solidity memory-safe-assembly\r\n assembly {\r\n r.slot := slot\r\n }\r\n }\r\n}\r\n\r\n\r\n// File @openzeppelin/contracts-upgradeable/proxy/ERC1967/ERC1967UpgradeUpgradeable.sol@v4.8.1\r\n\r\n// OpenZeppelin Contracts (last updated v4.5.0) (proxy/ERC1967/ERC1967Upgrade.sol)\r\n\r\npragma solidity ^0.8.2;\r\n\r\n\r\n\r\n\r\n\r\n/**\r\n * @dev This abstract contract provides getters and event emitting update functions for\r\n * https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots.\r\n *\r\n * _Available since v4.1._\r\n *\r\n * @custom:oz-upgrades-unsafe-allow delegatecall\r\n */\r\nabstract contract ERC1967UpgradeUpgradeable is Initializable {\r\n function __ERC1967Upgrade_init() internal onlyInitializing {\r\n }\r\n\r\n function __ERC1967Upgrade_init_unchained() internal onlyInitializing {\r\n }\r\n // This is the keccak-256 hash of \"eip1967.proxy.rollback\" subtracted by 1\r\n bytes32 private constant _ROLLBACK_SLOT = 0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143;\r\n\r\n /**\r\n * @dev Storage slot with the address of the current implementation.\r\n * This is the keccak-256 hash of \"eip1967.proxy.implementation\" subtracted by 1, and is\r\n * validated in the constructor.\r\n */\r\n bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;\r\n\r\n /**\r\n * @dev Emitted when the implementation is upgraded.\r\n */\r\n event Upgraded(address indexed implementation);\r\n\r\n /**\r\n * @dev Returns the current implementation address.\r\n */\r\n function _getImplementation() internal view returns (address) {\r\n return StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value;\r\n }\r\n\r\n /**\r\n * @dev Stores a new address in the EIP1967 implementation slot.\r\n */\r\n function _setImplementation(address newImplementation) private {\r\n require(AddressUpgradeable.isContract(newImplementation), \"ERC1967: new implementation is not a contract\");\r\n StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;\r\n }\r\n\r\n /**\r\n * @dev Perform implementation upgrade\r\n *\r\n * Emits an {Upgraded} event.\r\n */\r\n function _upgradeTo(address newImplementation) internal {\r\n _setImplementation(newImplementation);\r\n emit Upgraded(newImplementation);\r\n }\r\n\r\n /**\r\n * @dev Perform implementation upgrade with additional setup call.\r\n *\r\n * Emits an {Upgraded} event.\r\n */\r\n function _upgradeToAndCall(\r\n address newImplementation,\r\n bytes memory data,\r\n bool forceCall\r\n ) internal {\r\n _upgradeTo(newImplementation);\r\n if (data.length > 0 || forceCall) {\r\n _functionDelegateCall(newImplementation, data);\r\n }\r\n }\r\n\r\n /**\r\n * @dev Perform implementation upgrade with security checks for UUPS proxies, and additional setup call.\r\n *\r\n * Emits an {Upgraded} event.\r\n */\r\n function _upgradeToAndCallUUPS(\r\n address newImplementation,\r\n bytes memory data,\r\n bool forceCall\r\n ) internal {\r\n // Upgrades from old implementations will perform a rollback test. This test requires the new\r\n // implementation to upgrade back to the old, non-ERC1822 compliant, implementation. Removing\r\n // this special case will break upgrade paths from old UUPS implementation to new ones.\r\n if (StorageSlotUpgradeable.getBooleanSlot(_ROLLBACK_SLOT).value) {\r\n _setImplementation(newImplementation);\r\n } else {\r\n try IERC1822ProxiableUpgradeable(newImplementation).proxiableUUID() returns (bytes32 slot) {\r\n require(slot == _IMPLEMENTATION_SLOT, \"ERC1967Upgrade: unsupported proxiableUUID\");\r\n } catch {\r\n revert(\"ERC1967Upgrade: new implementation is not UUPS\");\r\n }\r\n _upgradeToAndCall(newImplementation, data, forceCall);\r\n }\r\n }\r\n\r\n /**\r\n * @dev Storage slot with the admin of the contract.\r\n * This is the keccak-256 hash of \"eip1967.proxy.admin\" subtracted by 1, and is\r\n * validated in the constructor.\r\n */\r\n bytes32 internal constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;\r\n\r\n /**\r\n * @dev Emitted when the admin account has changed.\r\n */\r\n event AdminChanged(address previousAdmin, address newAdmin);\r\n\r\n /**\r\n * @dev Returns the current admin.\r\n */\r\n function _getAdmin() internal view returns (address) {\r\n return StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value;\r\n }\r\n\r\n /**\r\n * @dev Stores a new address in the EIP1967 admin slot.\r\n */\r\n function _setAdmin(address newAdmin) private {\r\n require(newAdmin != address(0), \"ERC1967: new admin is the zero address\");\r\n StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value = newAdmin;\r\n }\r\n\r\n /**\r\n * @dev Changes the admin of the proxy.\r\n *\r\n * Emits an {AdminChanged} event.\r\n */\r\n function _changeAdmin(address newAdmin) internal {\r\n emit AdminChanged(_getAdmin(), newAdmin);\r\n _setAdmin(newAdmin);\r\n }\r\n\r\n /**\r\n * @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.\r\n * This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor.\r\n */\r\n bytes32 internal constant _BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;\r\n\r\n /**\r\n * @dev Emitted when the beacon is upgraded.\r\n */\r\n event BeaconUpgraded(address indexed beacon);\r\n\r\n /**\r\n * @dev Returns the current beacon.\r\n */\r\n function _getBeacon() internal view returns (address) {\r\n return StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value;\r\n }\r\n\r\n /**\r\n * @dev Stores a new beacon in the EIP1967 beacon slot.\r\n */\r\n function _setBeacon(address newBeacon) private {\r\n require(AddressUpgradeable.isContract(newBeacon), \"ERC1967: new beacon is not a contract\");\r\n require(\r\n AddressUpgradeable.isContract(IBeaconUpgradeable(newBeacon).implementation()),\r\n \"ERC1967: beacon implementation is not a contract\"\r\n );\r\n StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value = newBeacon;\r\n }\r\n\r\n /**\r\n * @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does\r\n * not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that).\r\n *\r\n * Emits a {BeaconUpgraded} event.\r\n */\r\n function _upgradeBeaconToAndCall(\r\n address newBeacon,\r\n bytes memory data,\r\n bool forceCall\r\n ) internal {\r\n _setBeacon(newBeacon);\r\n emit BeaconUpgraded(newBeacon);\r\n if (data.length > 0 || forceCall) {\r\n _functionDelegateCall(IBeaconUpgradeable(newBeacon).implementation(), data);\r\n }\r\n }\r\n\r\n /**\r\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\r\n * but performing a delegate call.\r\n *\r\n * _Available since v3.4._\r\n */\r\n function _functionDelegateCall(address target, bytes memory data) private returns (bytes memory) {\r\n require(AddressUpgradeable.isContract(target), \"Address: delegate call to non-contract\");\r\n\r\n // solhint-disable-next-line avoid-low-level-calls\r\n (bool success, bytes memory returndata) = target.delegatecall(data);\r\n return AddressUpgradeable.verifyCallResult(success, returndata, \"Address: low-level delegate call failed\");\r\n }\r\n\r\n /**\r\n * @dev This empty reserved space is put in place to allow future versions to add new\r\n * variables without shifting down storage in the inheritance chain.\r\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\r\n */\r\n uint256[50] private __gap;\r\n}\r\n\r\n\r\n// File @openzeppelin/contracts-upgradeable/proxy/utils/UUPSUpgradeable.sol@v4.8.1\r\n\r\n// OpenZeppelin Contracts (last updated v4.8.0) (proxy/utils/UUPSUpgradeable.sol)\r\n\r\npragma solidity ^0.8.0;\r\n\r\n\r\n\r\n/**\r\n * @dev An upgradeability mechanism designed for UUPS proxies. The functions included here can perform an upgrade of an\r\n * {ERC1967Proxy}, when this contract is set as the implementation behind such a proxy.\r\n *\r\n * A security mechanism ensures that an upgrade does not turn off upgradeability accidentally, although this risk is\r\n * reinstated if the upgrade retains upgradeability but removes the security mechanism, e.g. by replacing\r\n * `UUPSUpgradeable` with a custom implementation of upgrades.\r\n *\r\n * The {_authorizeUpgrade} function must be overridden to include access restriction to the upgrade mechanism.\r\n *\r\n * _Available since v4.1._\r\n */\r\nabstract contract UUPSUpgradeable is Initializable, IERC1822ProxiableUpgradeable, ERC1967UpgradeUpgradeable {\r\n function __UUPSUpgradeable_init() internal onlyInitializing {\r\n }\r\n\r\n function __UUPSUpgradeable_init_unchained() internal onlyInitializing {\r\n }\r\n /// @custom:oz-upgrades-unsafe-allow state-variable-immutable state-variable-assignment\r\n address private immutable __self = address(this);\r\n\r\n /**\r\n * @dev Check that the execution is being performed through a delegatecall call and that the execution context is\r\n * a proxy contract with an implementation (as defined in ERC1967) pointing to self. This should only be the case\r\n * for UUPS and transparent proxies that are using the current contract as their implementation. Execution of a\r\n * function through ERC1167 minimal proxies (clones) would not normally pass this test, but is not guaranteed to\r\n * fail.\r\n */\r\n modifier onlyProxy() {\r\n require(address(this) != __self, \"Function must be called through delegatecall\");\r\n require(_getImplementation() == __self, \"Function must be called through active proxy\");\r\n _;\r\n }\r\n\r\n /**\r\n * @dev Check that the execution is not being performed through a delegate call. This allows a function to be\r\n * callable on the implementing contract but not through proxies.\r\n */\r\n modifier notDelegated() {\r\n require(address(this) == __self, \"UUPSUpgradeable: must not be called through delegatecall\");\r\n _;\r\n }\r\n\r\n /**\r\n * @dev Implementation of the ERC1822 {proxiableUUID} function. This returns the storage slot used by the\r\n * implementation. It is used to validate the implementation's compatibility when performing an upgrade.\r\n *\r\n * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks\r\n * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this\r\n * function revert if invoked through a proxy. This is guaranteed by the `notDelegated` modifier.\r\n */\r\n function proxiableUUID() external view virtual override notDelegated returns (bytes32) {\r\n return _IMPLEMENTATION_SLOT;\r\n }\r\n\r\n /**\r\n * @dev Upgrade the implementation of the proxy to `newImplementation`.\r\n *\r\n * Calls {_authorizeUpgrade}.\r\n *\r\n * Emits an {Upgraded} event.\r\n */\r\n function upgradeTo(address newImplementation) external virtual onlyProxy {\r\n _authorizeUpgrade(newImplementation);\r\n _upgradeToAndCallUUPS(newImplementation, new bytes(0), false);\r\n }\r\n\r\n /**\r\n * @dev Upgrade the implementation of the proxy to `newImplementation`, and subsequently execute the function call\r\n * encoded in `data`.\r\n *\r\n * Calls {_authorizeUpgrade}.\r\n *\r\n * Emits an {Upgraded} event.\r\n */\r\n function upgradeToAndCall(address newImplementation, bytes memory data) external payable virtual onlyProxy {\r\n _authorizeUpgrade(newImplementation);\r\n _upgradeToAndCallUUPS(newImplementation, data, true);\r\n }\r\n\r\n /**\r\n * @dev Function that should revert when `msg.sender` is not authorized to upgrade the contract. Called by\r\n * {upgradeTo} and {upgradeToAndCall}.\r\n *\r\n * Normally, this function will use an xref:access.adoc[access control] modifier such as {Ownable-onlyOwner}.\r\n *\r\n * ```solidity\r\n * function _authorizeUpgrade(address) internal override onlyOwner {}\r\n * ```\r\n */\r\n function _authorizeUpgrade(address newImplementation) internal virtual;\r\n\r\n /**\r\n * @dev This empty reserved space is put in place to allow future versions to add new\r\n * variables without shifting down storage in the inheritance chain.\r\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\r\n */\r\n uint256[50] private __gap;\r\n}\r\n\r\n\r\n// File @openzeppelin/contracts-upgradeable/security/PausableUpgradeable.sol@v4.8.1\r\n\r\n// OpenZeppelin Contracts (last updated v4.7.0) (security/Pausable.sol)\r\n\r\npragma solidity ^0.8.0;\r\n\r\n\r\n/**\r\n * @dev Contract module which allows children to implement an emergency stop\r\n * mechanism that can be triggered by an authorized account.\r\n *\r\n * This module is used through inheritance. It will make available the\r\n * modifiers `whenNotPaused` and `whenPaused`, which can be applied to\r\n * the functions of your contract. Note that they will not be pausable by\r\n * simply including this module, only once the modifiers are put in place.\r\n */\r\nabstract contract PausableUpgradeable is Initializable, ContextUpgradeable {\r\n /**\r\n * @dev Emitted when the pause is triggered by `account`.\r\n */\r\n event Paused(address account);\r\n\r\n /**\r\n * @dev Emitted when the pause is lifted by `account`.\r\n */\r\n event Unpaused(address account);\r\n\r\n bool private _paused;\r\n\r\n /**\r\n * @dev Initializes the contract in unpaused state.\r\n */\r\n function __Pausable_init() internal onlyInitializing {\r\n __Pausable_init_unchained();\r\n }\r\n\r\n function __Pausable_init_unchained() internal onlyInitializing {\r\n _paused = false;\r\n }\r\n\r\n /**\r\n * @dev Modifier to make a function callable only when the contract is not paused.\r\n *\r\n * Requirements:\r\n *\r\n * - The contract must not be paused.\r\n */\r\n modifier whenNotPaused() {\r\n _requireNotPaused();\r\n _;\r\n }\r\n\r\n /**\r\n * @dev Modifier to make a function callable only when the contract is paused.\r\n *\r\n * Requirements:\r\n *\r\n * - The contract must be paused.\r\n */\r\n modifier whenPaused() {\r\n _requirePaused();\r\n _;\r\n }\r\n\r\n /**\r\n * @dev Returns true if the contract is paused, and false otherwise.\r\n */\r\n function paused() public view virtual returns (bool) {\r\n return _paused;\r\n }\r\n\r\n /**\r\n * @dev Throws if the contract is paused.\r\n */\r\n function _requireNotPaused() internal view virtual {\r\n require(!paused(), \"Pausable: paused\");\r\n }\r\n\r\n /**\r\n * @dev Throws if the contract is not paused.\r\n */\r\n function _requirePaused() internal view virtual {\r\n require(paused(), \"Pausable: not paused\");\r\n }\r\n\r\n /**\r\n * @dev Triggers stopped state.\r\n *\r\n * Requirements:\r\n *\r\n * - The contract must not be paused.\r\n */\r\n function _pause() internal virtual whenNotPaused {\r\n _paused = true;\r\n emit Paused(_msgSender());\r\n }\r\n\r\n /**\r\n * @dev Returns to normal state.\r\n *\r\n * Requirements:\r\n *\r\n * - The contract must be paused.\r\n */\r\n function _unpause() internal virtual whenPaused {\r\n _paused = false;\r\n emit Unpaused(_msgSender());\r\n }\r\n\r\n /**\r\n * @dev This empty reserved space is put in place to allow future versions to add new\r\n * variables without shifting down storage in the inheritance chain.\r\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\r\n */\r\n uint256[49] private __gap;\r\n}\r\n\r\n\r\n// File @openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol@v4.8.1\r\n\r\n// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)\r\n\r\npragma solidity ^0.8.0;\r\n\r\n/**\r\n * @dev Interface of the ERC20 standard as defined in the EIP.\r\n */\r\ninterface IERC20Upgradeable {\r\n /**\r\n * @dev Emitted when `value` tokens are moved from one account (`from`) to\r\n * another (`to`).\r\n *\r\n * Note that `value` may be zero.\r\n */\r\n event Transfer(address indexed from, address indexed to, uint256 value);\r\n\r\n /**\r\n * @dev Emitted when the allowance of a `spender` for an `owner` is set by\r\n * a call to {approve}. `value` is the new allowance.\r\n */\r\n event Approval(address indexed owner, address indexed spender, uint256 value);\r\n\r\n /**\r\n * @dev Returns the amount of tokens in existence.\r\n */\r\n function totalSupply() external view returns (uint256);\r\n\r\n /**\r\n * @dev Returns the amount of tokens owned by `account`.\r\n */\r\n function balanceOf(address account) external view returns (uint256);\r\n\r\n /**\r\n * @dev Moves `amount` tokens from the caller's account to `to`.\r\n *\r\n * Returns a boolean value indicating whether the operation succeeded.\r\n *\r\n * Emits a {Transfer} event.\r\n */\r\n function transfer(address to, uint256 amount) external returns (bool);\r\n\r\n /**\r\n * @dev Returns the remaining number of tokens that `spender` will be\r\n * allowed to spend on behalf of `owner` through {transferFrom}. This is\r\n * zero by default.\r\n *\r\n * This value changes when {approve} or {transferFrom} are called.\r\n */\r\n function allowance(address owner, address spender) external view returns (uint256);\r\n\r\n /**\r\n * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.\r\n *\r\n * Returns a boolean value indicating whether the operation succeeded.\r\n *\r\n * IMPORTANT: Beware that changing an allowance with this method brings the risk\r\n * that someone may use both the old and the new allowance by unfortunate\r\n * transaction ordering. One possible solution to mitigate this race\r\n * condition is to first reduce the spender's allowance to 0 and set the\r\n * desired value afterwards:\r\n * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729\r\n *\r\n * Emits an {Approval} event.\r\n */\r\n function approve(address spender, uint256 amount) external returns (bool);\r\n\r\n /**\r\n * @dev Moves `amount` tokens from `from` to `to` using the\r\n * allowance mechanism. `amount` is then deducted from the caller's\r\n * allowance.\r\n *\r\n * Returns a boolean value indicating whether the operation succeeded.\r\n *\r\n * Emits a {Transfer} event.\r\n */\r\n function transferFrom(\r\n address from,\r\n address to,\r\n uint256 amount\r\n ) external returns (bool);\r\n}\r\n\r\n\r\n// File @openzeppelin/contracts-upgradeable/token/ERC20/extensions/IERC20MetadataUpgradeable.sol@v4.8.1\r\n\r\n// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)\r\n\r\npragma solidity ^0.8.0;\r\n\r\n/**\r\n * @dev Interface for the optional metadata functions from the ERC20 standard.\r\n *\r\n * _Available since v4.1._\r\n */\r\ninterface IERC20MetadataUpgradeable is IERC20Upgradeable {\r\n /**\r\n * @dev Returns the name of the token.\r\n */\r\n function name() external view returns (string memory);\r\n\r\n /**\r\n * @dev Returns the symbol of the token.\r\n */\r\n function symbol() external view returns (string memory);\r\n\r\n /**\r\n * @dev Returns the decimals places of the token.\r\n */\r\n function decimals() external view returns (uint8);\r\n}\r\n\r\n\r\n// File @openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol@v4.8.1\r\n\r\n// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/ERC20.sol)\r\n\r\npragma solidity ^0.8.0;\r\n\r\n\r\n\r\n\r\n/**\r\n * @dev Implementation of the {IERC20} interface.\r\n *\r\n * This implementation is agnostic to the way tokens are created. This means\r\n * that a supply mechanism has to be added in a derived contract using {_mint}.\r\n * For a generic mechanism see {ERC20PresetMinterPauser}.\r\n *\r\n * TIP: For a detailed writeup see our guide\r\n * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How\r\n * to implement supply mechanisms].\r\n *\r\n * We have followed general OpenZeppelin Contracts guidelines: functions revert\r\n * instead returning `false` on failure. This behavior is nonetheless\r\n * conventional and does not conflict with the expectations of ERC20\r\n * applications.\r\n *\r\n * Additionally, an {Approval} event is emitted on calls to {transferFrom}.\r\n * This allows applications to reconstruct the allowance for all accounts just\r\n * by listening to said events. Other implementations of the EIP may not emit\r\n * these events, as it isn't required by the specification.\r\n *\r\n * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}\r\n * functions have been added to mitigate the well-known issues around setting\r\n * allowances. See {IERC20-approve}.\r\n */\r\ncontract ERC20Upgradeable is Initializable, ContextUpgradeable, IERC20Upgradeable, IERC20MetadataUpgradeable {\r\n mapping(address => uint256) private _balances;\r\n\r\n mapping(address => mapping(address => uint256)) private _allowances;\r\n\r\n uint256 private _totalSupply;\r\n\r\n string private _name;\r\n string private _symbol;\r\n\r\n /**\r\n * @dev Sets the values for {name} and {symbol}.\r\n *\r\n * The default value of {decimals} is 18. To select a different value for\r\n * {decimals} you should overload it.\r\n *\r\n * All two of these values are immutable: they can only be set once during\r\n * construction.\r\n */\r\n function __ERC20_init(string memory name_, string memory symbol_) internal onlyInitializing {\r\n __ERC20_init_unchained(name_, symbol_);\r\n }\r\n\r\n function __ERC20_init_unchained(string memory name_, string memory symbol_) internal onlyInitializing {\r\n _name = name_;\r\n _symbol = symbol_;\r\n }\r\n\r\n /**\r\n * @dev Returns the name of the token.\r\n */\r\n function name() public view virtual override returns (string memory) {\r\n return _name;\r\n }\r\n\r\n /**\r\n * @dev Returns the symbol of the token, usually a shorter version of the\r\n * name.\r\n */\r\n function symbol() public view virtual override returns (string memory) {\r\n return _symbol;\r\n }\r\n\r\n /**\r\n * @dev Returns the number of decimals used to get its user representation.\r\n * For example, if `decimals` equals `2`, a balance of `505` tokens should\r\n * be displayed to a user as `5.05` (`505 / 10 ** 2`).\r\n *\r\n * Tokens usually opt for a value of 18, imitating the relationship between\r\n * Ether and Wei. This is the value {ERC20} uses, unless this function is\r\n * overridden;\r\n *\r\n * NOTE: This information is only used for _display_ purposes: it in\r\n * no way affects any of the arithmetic of the contract, including\r\n * {IERC20-balanceOf} and {IERC20-transfer}.\r\n */\r\n function decimals() public view virtual override returns (uint8) {\r\n return 18;\r\n }\r\n\r\n /**\r\n * @dev See {IERC20-totalSupply}.\r\n */\r\n function totalSupply() public view virtual override returns (uint256) {\r\n return _totalSupply;\r\n }\r\n\r\n /**\r\n * @dev See {IERC20-balanceOf}.\r\n */\r\n function balanceOf(address account) public view virtual override returns (uint256) {\r\n return _balances[account];\r\n }\r\n\r\n /**\r\n * @dev See {IERC20-transfer}.\r\n *\r\n * Requirements:\r\n *\r\n * - `to` cannot be the zero address.\r\n * - the caller must have a balance of at least `amount`.\r\n */\r\n function transfer(address to, uint256 amount) public virtual override returns (bool) {\r\n address owner = _msgSender();\r\n _transfer(owner, to, amount);\r\n return true;\r\n }\r\n\r\n /**\r\n * @dev See {IERC20-allowance}.\r\n */\r\n function allowance(address owner, address spender) public view virtual override returns (uint256) {\r\n return _allowances[owner][spender];\r\n }\r\n\r\n /**\r\n * @dev See {IERC20-approve}.\r\n *\r\n * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on\r\n * `transferFrom`. This is semantically equivalent to an infinite approval.\r\n *\r\n * Requirements:\r\n *\r\n * - `spender` cannot be the zero address.\r\n */\r\n function approve(address spender, uint256 amount) public virtual override returns (bool) {\r\n address owner = _msgSender();\r\n _approve(owner, spender, amount);\r\n return true;\r\n }\r\n\r\n /**\r\n * @dev See {IERC20-transferFrom}.\r\n *\r\n * Emits an {Approval} event indicating the updated allowance. This is not\r\n * required by the EIP. See the note at the beginning of {ERC20}.\r\n *\r\n * NOTE: Does not update the allowance if the current allowance\r\n * is the maximum `uint256`.\r\n *\r\n * Requirements:\r\n *\r\n * - `from` and `to` cannot be the zero address.\r\n * - `from` must have a balance of at least `amount`.\r\n * - the caller must have allowance for ``from``'s tokens of at least\r\n * `amount`.\r\n */\r\n function transferFrom(\r\n address from,\r\n address to,\r\n uint256 amount\r\n ) public virtual override returns (bool) {\r\n address spender = _msgSender();\r\n _spendAllowance(from, spender, amount);\r\n _transfer(from, to, amount);\r\n return true;\r\n }\r\n\r\n /**\r\n * @dev Atomically increases the allowance granted to `spender` by the caller.\r\n *\r\n * This is an alternative to {approve} that can be used as a mitigation for\r\n * problems described in {IERC20-approve}.\r\n *\r\n * Emits an {Approval} event indicating the updated allowance.\r\n *\r\n * Requirements:\r\n *\r\n * - `spender` cannot be the zero address.\r\n */\r\n function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {\r\n address owner = _msgSender();\r\n _approve(owner, spender, allowance(owner, spender) + addedValue);\r\n return true;\r\n }\r\n\r\n /**\r\n * @dev Atomically decreases the allowance granted to `spender` by the caller.\r\n *\r\n * This is an alternative to {approve} that can be used as a mitigation for\r\n * problems described in {IERC20-approve}.\r\n *\r\n * Emits an {Approval} event indicating the updated allowance.\r\n *\r\n * Requirements:\r\n *\r\n * - `spender` cannot be the zero address.\r\n * - `spender` must have allowance for the caller of at least\r\n * `subtractedValue`.\r\n */\r\n function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {\r\n address owner = _msgSender();\r\n uint256 currentAllowance = allowance(owner, spender);\r\n require(currentAllowance >= subtractedValue, \"ERC20: decreased allowance below zero\");\r\n unchecked {\r\n _approve(owner, spender, currentAllowance - subtractedValue);\r\n }\r\n\r\n return true;\r\n }\r\n\r\n /**\r\n * @dev Moves `amount` of tokens from `from` to `to`.\r\n *\r\n * This internal function is equivalent to {transfer}, and can be used to\r\n * e.g. implement automatic token fees, slashing mechanisms, etc.\r\n *\r\n * Emits a {Transfer} event.\r\n *\r\n * Requirements:\r\n *\r\n * - `from` cannot be the zero address.\r\n * - `to` cannot be the zero address.\r\n * - `from` must have a balance of at least `amount`.\r\n */\r\n function _transfer(\r\n address from,\r\n address to,\r\n uint256 amount\r\n ) internal virtual {\r\n require(from != address(0), \"ERC20: transfer from the zero address\");\r\n require(to != address(0), \"ERC20: transfer to the zero address\");\r\n\r\n _beforeTokenTransfer(from, to, amount);\r\n\r\n uint256 fromBalance = _balances[from];\r\n require(fromBalance >= amount, \"ERC20: transfer amount exceeds balance\");\r\n unchecked {\r\n _balances[from] = fromBalance - amount;\r\n // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by\r\n // decrementing then incrementing.\r\n _balances[to] += amount;\r\n }\r\n\r\n emit Transfer(from, to, amount);\r\n\r\n _afterTokenTransfer(from, to, amount);\r\n }\r\n\r\n /** @dev Creates `amount` tokens and assigns them to `account`, increasing\r\n * the total supply.\r\n *\r\n * Emits a {Transfer} event with `from` set to the zero address.\r\n *\r\n * Requirements:\r\n *\r\n * - `account` cannot be the zero address.\r\n */\r\n function _mint(address account, uint256 amount) internal virtual {\r\n require(account != address(0), \"ERC20: mint to the zero address\");\r\n\r\n _beforeTokenTransfer(address(0), account, amount);\r\n\r\n _totalSupply += amount;\r\n unchecked {\r\n // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above.\r\n _balances[account] += amount;\r\n }\r\n emit Transfer(address(0), account, amount);\r\n\r\n _afterTokenTransfer(address(0), account, amount);\r\n }\r\n\r\n /**\r\n * @dev Destroys `amount` tokens from `account`, reducing the\r\n * total supply.\r\n *\r\n * Emits a {Transfer} event with `to` set to the zero address.\r\n *\r\n * Requirements:\r\n *\r\n * - `account` cannot be the zero address.\r\n * - `account` must have at least `amount` tokens.\r\n */\r\n function _burn(address account, uint256 amount) internal virtual {\r\n require(account != address(0), \"ERC20: burn from the zero address\");\r\n\r\n _beforeTokenTransfer(account, address(0), amount);\r\n\r\n uint256 accountBalance = _balances[account];\r\n require(accountBalance >= amount, \"ERC20: burn amount exceeds balance\");\r\n unchecked {\r\n _balances[account] = accountBalance - amount;\r\n // Overflow not possible: amount <= accountBalance <= totalSupply.\r\n _totalSupply -= amount;\r\n }\r\n\r\n emit Transfer(account, address(0), amount);\r\n\r\n _afterTokenTransfer(account, address(0), amount);\r\n }\r\n\r\n /**\r\n * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.\r\n *\r\n * This internal function is equivalent to `approve`, and can be used to\r\n * e.g. set automatic allowances for certain subsystems, etc.\r\n *\r\n * Emits an {Approval} event.\r\n *\r\n * Requirements:\r\n *\r\n * - `owner` cannot be the zero address.\r\n * - `spender` cannot be the zero address.\r\n */\r\n function _approve(\r\n address owner,\r\n address spender,\r\n uint256 amount\r\n ) internal virtual {\r\n require(owner != address(0), \"ERC20: approve from the zero address\");\r\n require(spender != address(0), \"ERC20: approve to the zero address\");\r\n\r\n _allowances[owner][spender] = amount;\r\n emit Approval(owner, spender, amount);\r\n }\r\n\r\n /**\r\n * @dev Updates `owner` s allowance for `spender` based on spent `amount`.\r\n *\r\n * Does not update the allowance amount in case of infinite allowance.\r\n * Revert if not enough allowance is available.\r\n *\r\n * Might emit an {Approval} event.\r\n */\r\n function _spendAllowance(\r\n address owner,\r\n address spender,\r\n uint256 amount\r\n ) internal virtual {\r\n uint256 currentAllowance = allowance(owner, spender);\r\n if (currentAllowance != type(uint256).max) {\r\n require(currentAllowance >= amount, \"ERC20: insufficient allowance\");\r\n unchecked {\r\n _approve(owner, spender, currentAllowance - amount);\r\n }\r\n }\r\n }\r\n\r\n /**\r\n * @dev Hook that is called before any transfer of tokens. This includes\r\n * minting and burning.\r\n *\r\n * Calling conditions:\r\n *\r\n * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens\r\n * will be transferred to `to`.\r\n * - when `from` is zero, `amount` tokens will be minted for `to`.\r\n * - when `to` is zero, `amount` of ``from``'s tokens will be burned.\r\n * - `from` and `to` are never both zero.\r\n *\r\n * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].\r\n */\r\n function _beforeTokenTransfer(\r\n address from,\r\n address to,\r\n uint256 amount\r\n ) internal virtual {}\r\n\r\n /**\r\n * @dev Hook that is called after any transfer of tokens. This includes\r\n * minting and burning.\r\n *\r\n * Calling conditions:\r\n *\r\n * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens\r\n * has been transferred to `to`.\r\n * - when `from` is zero, `amount` tokens have been minted for `to`.\r\n * - when `to` is zero, `amount` of ``from``'s tokens have been burned.\r\n * - `from` and `to` are never both zero.\r\n *\r\n * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].\r\n */\r\n function _afterTokenTransfer(\r\n address from,\r\n address to,\r\n uint256 amount\r\n ) internal virtual {}\r\n\r\n /**\r\n * @dev This empty reserved space is put in place to allow future versions to add new\r\n * variables without shifting down storage in the inheritance chain.\r\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\r\n */\r\n uint256[45] private __gap;\r\n}\r\n\r\n\r\n// File contracts/ErrorCoded.sol\r\n\r\n// Copyright FMR LLC\r\npragma solidity 0.8.9;\r\n\r\n/**\r\n * @title ErrorCoded\r\n * @dev ErrorCoded is a library that defines custom error types used in Mintable Token\r\n */\r\n\r\nlibrary ErrorCoded {\r\n string public constant ERR_TRANSFER_RESTRICTED =\r\n \"Restrictable: Unable to transfer to or from addresses on transfer restriction list\";\r\n string public constant ERR_TRANSFER_RESTRICTION_INVALID =\r\n \"Restrictable: Unable to restrict transfers of 0 address\";\r\n string public constant ERR_CONTRACT_NOT_DEPLOYED =\r\n \"MintableToken: Contract must be deployed prior to upgrading\";\r\n string public constant ERR_INSUFFICIENT_MINT_ALLOCATION =\r\n \"MintAllocated: Amount must be less than or equal to the current mint allocation for a minter\";\r\n string public constant ERR_DEFAULT_ADMIN_CANNOT_RENOUNCE =\r\n \"SafeAccessControlEnumerable: Default Admin cannot renounce own role\";\r\n string public constant ERR_ONLY_MINTERS_HAVE_MINT_ALLOCATIONS =\r\n \"MintAllocated: Unable to adjust the mint allocation for a non-minter\";\r\n string public constant ERR_ADMIN_ADDRESS_INVALID =\r\n \"MintableToken: Admin address cannot be set to 0\";\r\n string public constant ERR_CANNOT_REVOKE_LAST_DEFAULT_ADMIN =\r\n \"SafeAccessControlEnumerable: Can't revoke or renounce role of the Default Admin when there is only one remaining\";\r\n string public constant ERR_ARITHMETIC_OVERFLOW_ALLOWANCE =\r\n \"MintableToken: Arithmetic overflow\";\r\n string public constant ERR_ARITHMETIC_OVERFLOW_MINT =\r\n \"MintAllocated: Arithmetic overflow\";\r\n string public constant ERR_INVALID_RECIPIENT =\r\n \"MintableToken: Token cannot be transferred to token contract\";\r\n string public constant ERR_USER_DOES_NOT_HAVE_ROLE =\r\n \"SafeAccessControlEnumerable: User does not have role\";\r\n string public constant ERR_RESTRICT_TRANSFERS_ADD =\r\n \"Restrictable: User already in transfer restriction list\";\r\n string public constant ERR_RESTRICT_TRANSFERS_REMOVE =\r\n \"Restrictable: User not in transfer restriction list\";\r\n}\r\n\r\n\r\n// File contracts/RoleManaged.sol\r\n\r\n// Copyright FMR LLC\r\npragma solidity 0.8.9;\r\n\r\n/**\r\n * @title RoleManaged\r\n * @dev RoleManaged defines account role identifiers\r\n */\r\n\r\nlibrary RoleManaged {\r\n /**\r\n * @dev\r\n * DEFAULT_ADMIN_ROLE: Modify role entitlements, and unpause the contract\r\n * UPGRADER_ROLE: Upgrade the contract\r\n * MINTER_ROLE: Mint (to any address except those on transfer restriction list)\r\n * Burn (only tokens owned by minter, or for which the minter is an approved spender)\r\n * MINTER_ALLOCATOR_ROLE: Increase or decrease mint allocation assigned to minters\r\n * TOKEN_TRANSFER_CONTROLLER_ROLE: Add and remove addresses from the transfer restriction list\r\n * PAUSER_ROLE: Pause\r\n */\r\n\r\n // DEFAULT ADMIN_ROLE is inherited from OpenZeppelin AccessControlUpgradeable\r\n // See https://github.com/OpenZeppelin/openzeppelin-contracts-upgradeable/blob/v4.8.1/contracts/access/AccessControlUpgradeable.sol#L63\r\n // DEFAULT_ADMIN_ROLE: 0x0000000000000000000000000000000000000000000000000000000000000000\r\n\r\n // UPGRADER_ROLE: 0x189ab7a9244df0848122154315af71fe140f3db0fe014031783b0946b8c9d2e3\r\n bytes32 public constant UPGRADER_ROLE = keccak256(\"UPGRADER_ROLE\");\r\n\r\n // MINT_ALLOCATOR_ROLE: 0x0cecf1b455fc79891fde338087a5bc58cc780c12baea2fdc499814ec6b42206a\r\n bytes32 public constant MINT_ALLOCATOR_ROLE =\r\n keccak256(\"MINT_ALLOCATOR_ROLE\");\r\n\r\n // MINTER_ROLE: 0x9f2df0fed2c77648de5860a4cc508cd0818c85b8b8a1ab4ceeef8d981c8956a6\r\n bytes32 public constant MINTER_ROLE = keccak256(\"MINTER_ROLE\");\r\n\r\n // TOKEN_TRANSFER_CONTROLLER_ROLE: 0xfacce159e6968cd08fd9a4077ce70318710e6a3e2ca966e7a450e0609027b94e\r\n bytes32 public constant TOKEN_TRANSFER_CONTROLLER_ROLE =\r\n keccak256(\"TOKEN_TRANSFER_CONTROLLER_ROLE\");\r\n\r\n // PAUSER_ROLE: 0x65d7a28e3265b37a6474929f336521b332c1681b933f6cb9f3376673440d862a\r\n bytes32 public constant PAUSER_ROLE = keccak256(\"PAUSER_ROLE\");\r\n}\r\n\r\n\r\n// File contracts/RestrictableUpgradeable.sol\r\n\r\n// Copyright FMR LLC\r\npragma solidity 0.8.9;\r\n\r\n\r\n\r\n\r\n\r\n/**\r\n * @title RestrictableUpgradeable\r\n * @dev RestrictableUpgradeable allows accounts to be transfer restricted\r\n * preventing them from sending or receiving tokens\r\n */\r\n\r\ncontract RestrictableUpgradeable is\r\n Initializable,\r\n AccessControlEnumerableUpgradeable,\r\n PausableUpgradeable,\r\n ERC20Upgradeable\r\n{\r\n using EnumerableSetUpgradeable for EnumerableSetUpgradeable.AddressSet;\r\n //mapping an address to the transfer restriction list\r\n EnumerableSetUpgradeable.AddressSet private restricted;\r\n\r\n function __RestrictableUpgradeable_init() internal onlyInitializing {}\r\n\r\n function __RestrictableUpgradeable_init_unchained()\r\n internal\r\n onlyInitializing\r\n {}\r\n\r\n /**\r\n * @dev Emitted when an account is added to, or removed from the transfer restriction list\r\n */\r\n event TransferRestrictionImposed(address indexed account);\r\n event TransferRestrictionRemoved(address indexed account);\r\n\r\n modifier whenNotRestricted(address actionAccount) {\r\n require(\r\n !(isTransferRestrictionImposed(actionAccount)),\r\n ErrorCoded.ERR_TRANSFER_RESTRICTED\r\n );\r\n _;\r\n }\r\n\r\n /**\r\n * @dev Unpauses the contract\r\n *\r\n * @notice Only the admin will be able to unpause the contract\r\n */\r\n function unpause() external virtual onlyRole(DEFAULT_ADMIN_ROLE) {\r\n _unpause();\r\n }\r\n\r\n /**\r\n * @dev When paused, most functions of the contract will be unusable until the contract is unpaused\r\n *\r\n * @notice Only pausers can use the `pause` function\r\n */\r\n function pause() external virtual onlyRole(RoleManaged.PAUSER_ROLE) {\r\n _pause();\r\n }\r\n\r\n /**\r\n * @dev Restricts `restrictedAddress` from making token transfers\r\n *\r\n * @param restrictedAddress address of account to add to the transfer restriction list\r\n *\r\n * @notice Only token transfer controllers can use the `restrictTransfers` function\r\n */\r\n function restrictTransfers(\r\n address restrictedAddress\r\n ) external virtual onlyRole(RoleManaged.TOKEN_TRANSFER_CONTROLLER_ROLE) {\r\n require(\r\n restrictedAddress != address(0),\r\n ErrorCoded.ERR_TRANSFER_RESTRICTION_INVALID\r\n );\r\n bool success = EnumerableSetUpgradeable.add(\r\n restricted,\r\n restrictedAddress\r\n );\r\n require(success, ErrorCoded.ERR_RESTRICT_TRANSFERS_ADD);\r\n emit TransferRestrictionImposed(restrictedAddress);\r\n }\r\n\r\n /**\r\n * @dev Unrestricts `restrictedAddress` allowing them to make transfers again\r\n *\r\n * @param restrictedAddress address to be removed from the transfer restriction list\r\n *\r\n * @notice Only token transfer controllers can use the `unrestrictTransfers` function\r\n */\r\n function unrestrictTransfers(\r\n address restrictedAddress\r\n ) external virtual onlyRole(RoleManaged.TOKEN_TRANSFER_CONTROLLER_ROLE) {\r\n bool success = EnumerableSetUpgradeable.remove(\r\n restricted,\r\n restrictedAddress\r\n );\r\n require(success, ErrorCoded.ERR_RESTRICT_TRANSFERS_REMOVE);\r\n emit TransferRestrictionRemoved(restrictedAddress);\r\n }\r\n\r\n /**\r\n * @dev Verifies if an address is on the transfer restriction list\r\n *\r\n * @param account address for which we are checking transferability\r\n */\r\n function isTransferRestrictionImposed(\r\n address account\r\n ) public view virtual returns (bool) {\r\n return EnumerableSetUpgradeable.contains(restricted, account);\r\n }\r\n\r\n /**\r\n * @dev Finds transfer restricted address by index\r\n *\r\n * @param index index in the transfer restriction list to fetch\r\n */\r\n function getTransferRestriction(\r\n uint256 index\r\n ) external view virtual returns (address) {\r\n return EnumerableSetUpgradeable.at(restricted, index);\r\n }\r\n\r\n /**\r\n * @dev Find number of transfer restricted addresses\r\n */\r\n function getTransferRestrictionCount()\r\n external\r\n view\r\n virtual\r\n returns (uint256)\r\n {\r\n return EnumerableSetUpgradeable.length(restricted);\r\n }\r\n\r\n /**\r\n * @dev This empty reserved space is put in place to allow future versions to add new\r\n * variables without shifting down storage in the inheritance chain.\r\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\r\n */\r\n uint256[48] private __gap;\r\n}\r\n\r\n\r\n// File contracts/MintAllocatedUpgradeable.sol\r\n\r\n// Copyright FMR LLC\r\npragma solidity 0.8.9;\r\n\r\n\r\n\r\n\r\n\r\n\r\n/**\r\n * @title MintAllocatedUpgradeable\r\n * @dev MintAllocatedUpgradeable enables token minting by addresses with the minter role\r\n * in accordance with allotments set by mint allocators\r\n */\r\n\r\ncontract MintAllocatedUpgradeable is\r\n Initializable,\r\n AccessControlEnumerableUpgradeable,\r\n PausableUpgradeable,\r\n ERC20Upgradeable,\r\n RestrictableUpgradeable\r\n{\r\n function __MintAllocatedUpgradeable_init() internal onlyInitializing {}\r\n\r\n function __MintAllocatedUpgradeable_init_unchained()\r\n internal\r\n onlyInitializing\r\n {}\r\n\r\n /**\r\n * @dev Mint Allocation is a per-minter allocation which allows minters to mint a certain number of tokens\r\n *\r\n * @notice Mint allocators can add or remove from this allowance\r\n */\r\n mapping(address => uint256) public mintAllocation;\r\n\r\n /**\r\n * @dev Emitted when a `mintAllocation` is updated by a mint allocator\r\n */\r\n event MintAllocationChanged(\r\n address indexed mintAllocator,\r\n address indexed minter,\r\n uint256 allocation\r\n );\r\n event Mint(address indexed minter, address indexed to, uint256 value);\r\n event Burn(address indexed burner, uint256 amount);\r\n\r\n modifier isMinter(address actionAccount) {\r\n require(\r\n hasRole(RoleManaged.MINTER_ROLE, actionAccount),\r\n ErrorCoded.ERR_ONLY_MINTERS_HAVE_MINT_ALLOCATIONS\r\n );\r\n _;\r\n }\r\n\r\n /**\r\n * @dev Allows a mint allocator to increase a minter's mint allocation\r\n *\r\n * @param minter the minter's address\r\n * @param amount total amount by which the mint allocation is increased\r\n *\r\n * @notice Only mint allocators can adjust the mint allocation of a minter\r\n * @notice Only a valid minter address should be able to have an allocation set\r\n */\r\n function increaseMintAllocation(\r\n address minter,\r\n uint256 amount\r\n )\r\n external\r\n virtual\r\n whenNotPaused\r\n onlyRole(RoleManaged.MINT_ALLOCATOR_ROLE)\r\n isMinter(minter)\r\n {\r\n require(\r\n type(uint256).max - mintAllocation[minter] >= amount,\r\n ErrorCoded.ERR_ARITHMETIC_OVERFLOW_MINT\r\n );\r\n unchecked {\r\n mintAllocation[minter] = mintAllocation[minter] + amount;\r\n }\r\n emit MintAllocationChanged(\r\n _msgSender(),\r\n minter,\r\n mintAllocation[minter]\r\n );\r\n }\r\n\r\n /**\r\n * @dev Atomically decreases the mint allocation of a minter\r\n *\r\n * @param minter the minter's address\r\n * @param amount total amount by which the minter's allocation is decreased\r\n *\r\n * @notice Decreases in mint allocation are allowed to succeed even when `amount` exceeds allocation to ensure that a\r\n * decrease will succeed even in a race condition when a mint separately decreases the `mintAllocation`\r\n */\r\n function decreaseMintAllocation(\r\n address minter,\r\n uint256 amount\r\n )\r\n external\r\n virtual\r\n whenNotPaused\r\n onlyRole(RoleManaged.MINT_ALLOCATOR_ROLE)\r\n isMinter(minter)\r\n {\r\n uint256 newAllocation = mintAllocation[minter] > amount\r\n ? mintAllocation[minter] - amount\r\n : 0;\r\n\r\n mintAllocation[minter] = newAllocation;\r\n\r\n emit MintAllocationChanged(\r\n _msgSender(),\r\n minter,\r\n mintAllocation[minter]\r\n );\r\n }\r\n\r\n /**\r\n * @dev Mints tokens to a specified address, decreasing the `mintAllocation` after the coins are minted.\r\n *\r\n * @param to address that will receive the newly minted tokens\r\n * @param amount the quantity of tokens to mint\r\n *\r\n * @notice Only minters can use the mint function\r\n * @notice The minter must have enough tokens in their `mintAllocation` to mint\r\n */\r\n function mint(\r\n address to,\r\n uint256 amount\r\n )\r\n external\r\n virtual\r\n whenNotPaused\r\n onlyRole(RoleManaged.MINTER_ROLE)\r\n whenNotRestricted(_msgSender())\r\n whenNotRestricted(to)\r\n whenNotRestricted(tx.origin)\r\n {\r\n require(\r\n amount <= mintAllocation[_msgSender()],\r\n ErrorCoded.ERR_INSUFFICIENT_MINT_ALLOCATION\r\n );\r\n _mint(to, amount);\r\n unchecked {\r\n mintAllocation[_msgSender()] =\r\n mintAllocation[_msgSender()] -\r\n amount;\r\n }\r\n emit Mint(_msgSender(), to, amount);\r\n }\r\n\r\n /**\r\n * @dev Destroys `amount` tokens from the caller\r\n *\r\n * @param amount the quantity of tokens to burn\r\n *\r\n * @notice Only minters are allowed to burn tokens\r\n */\r\n function burn(\r\n uint256 amount\r\n )\r\n external\r\n virtual\r\n whenNotPaused\r\n onlyRole(RoleManaged.MINTER_ROLE)\r\n whenNotRestricted(_msgSender())\r\n whenNotRestricted(tx.origin)\r\n {\r\n _burn(_msgSender(), amount);\r\n emit Burn(_msgSender(), amount);\r\n }\r\n\r\n /**\r\n * @dev Destroys `amount` tokens from the caller\r\n *\r\n * @notice Only minters are allowed to `burnFrom` their own account\r\n * or allowances they have been given\r\n */\r\n function burnFrom(\r\n address account,\r\n uint256 amount\r\n )\r\n external\r\n virtual\r\n whenNotPaused\r\n onlyRole(RoleManaged.MINTER_ROLE)\r\n whenNotRestricted(account)\r\n whenNotRestricted(_msgSender())\r\n whenNotRestricted(tx.origin)\r\n {\r\n if (account != _msgSender()) {\r\n _spendAllowance(account, _msgSender(), amount);\r\n }\r\n _burn(account, amount);\r\n emit Burn(account, amount);\r\n }\r\n\r\n /**\r\n * @dev This empty reserved space is put in place to allow future versions to add new\r\n * variables without shifting down storage in the inheritance chain.\r\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\r\n */\r\n uint256[49] private __gap;\r\n}\r\n\r\n\r\n// File contracts/SafeAccessControlEnumerableUpgradeable.sol\r\n\r\n// Copyright FMR LLC\r\npragma solidity 0.8.9;\r\n\r\n\r\n\r\n\r\n\r\n/**\r\n * @title SafeAccessControlEnumerableUpgradeable\r\n * @dev SafeAccessControlEnumerableUpgradeable adds role-specific logic\r\n * to the AccessControlEnumerableUpgradeable contract to ensure that\r\n * mint allocations are set back to 0 when a Minter role is revoked\r\n * and controls to ensure the contract always has at least one admin\r\n */\r\n\r\ncontract SafeAccessControlEnumerableUpgradeable is\r\n Initializable,\r\n AccessControlEnumerableUpgradeable,\r\n ERC20Upgradeable,\r\n MintAllocatedUpgradeable\r\n{\r\n function __SafeAccessControlEnumerable_init() internal onlyInitializing {}\r\n\r\n function __SafeAccessControlEnumerable_init_unchained()\r\n internal\r\n onlyInitializing\r\n {}\r\n\r\n /**\r\n * @dev Revokes `role` from `account`\r\n *\r\n * @param role bytes32 of the role to revoke\r\n * @param account address to remove from role list\r\n */\r\n function revokeRole(\r\n bytes32 role,\r\n address account\r\n ) external virtual override {\r\n _safeRevokeRenounce(role, account);\r\n super.revokeRole(role, account);\r\n }\r\n\r\n /**\r\n * @dev An account revokes `role` from its own address\r\n *\r\n * @param role bytes32 of the role to renounce\r\n * @param account address to remove from role list\r\n */\r\n function renounceRole(\r\n bytes32 role,\r\n address account\r\n ) public virtual override {\r\n _safeRevokeRenounce(role, account);\r\n super.renounceRole(role, account);\r\n }\r\n\r\n /**\r\n * @dev Checks if role being revoked or renounced is a Minter or Default Admin\r\n *\r\n * @param role bytes32 of the role to renounce\r\n * @param account address to remove from role list\r\n *\r\n * @notice We restrict revoke or renounce of a role for the last Default Admin Role account\r\n * note that this is implicitly true because we don't allow an admin to revoke their own role\r\n * @notice We set Mint Allocation to 0 if we revoke or renounce Minter Role\r\n */\r\n function _safeRevokeRenounce(bytes32 role, address account) internal {\r\n require(hasRole(role, account), ErrorCoded.ERR_USER_DOES_NOT_HAVE_ROLE);\r\n if (role == RoleManaged.MINTER_ROLE) {\r\n unchecked {\r\n mintAllocation[account] = 0;\r\n }\r\n emit MintAllocationChanged(\r\n _msgSender(),\r\n account,\r\n mintAllocation[account]\r\n );\r\n }\r\n\r\n // Admin is not allowed to revoke its own role. This is to prevent accidental\r\n // loss of control of the contract\r\n if (role == DEFAULT_ADMIN_ROLE) {\r\n require(\r\n _msgSender() != account,\r\n ErrorCoded.ERR_DEFAULT_ADMIN_CANNOT_RENOUNCE\r\n );\r\n require(\r\n getRoleMemberCount(DEFAULT_ADMIN_ROLE) > 1,\r\n ErrorCoded.ERR_CANNOT_REVOKE_LAST_DEFAULT_ADMIN\r\n );\r\n }\r\n }\r\n\r\n /**\r\n * @dev This empty reserved space is put in place to allow future versions to add new\r\n * variables without shifting down storage in the inheritance chain.\r\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\r\n */\r\n uint256[50] private __gap;\r\n}\r\n\r\n\r\n// File contracts/MintableToken.sol\r\n\r\n// Copyright FMR LLC\r\npragma solidity 0.8.9;\r\n\r\n\r\n// Custom modules\r\n\r\n\r\n\r\n\r\n\r\n/**\r\n * @title MintableToken\r\n * @dev MintableToken is an upgradeable ERC20 token with special provisions for minting, burning and transfer restrictions\r\n */\r\n\r\ncontract MintableToken is\r\n UUPSUpgradeable,\r\n RestrictableUpgradeable,\r\n MintAllocatedUpgradeable,\r\n SafeAccessControlEnumerableUpgradeable\r\n{\r\n using RoleManaged for bytes32;\r\n using ErrorCoded for string;\r\n\r\n /**\r\n * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.\r\n * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized\r\n * to any version. It is recommended to use this to lock implementation contracts that are designed to be called\r\n * through proxies.\r\n */\r\n /// @custom:oz-upgrades-unsafe-allow constructor\r\n constructor() {\r\n _disableInitializers();\r\n }\r\n\r\n /**\r\n * @dev Initializes the ERC20 contract with token name and symbol, and sets an address to the `DEFAULT_ADMIN_ROLE`\r\n *\r\n * @param _name the name of the token\r\n * @param _symbol the symbol of the token\r\n * @param _admin the default admin address for the token contract\r\n *\r\n * @notice Admin address must be set upon deployment. Contract deployer(_msgSender()) is not assumed to have any role.\r\n * @notice All other roles of the token contract must be granted in additional transactions.\r\n * @notice This must fail if the admin address is zero.\r\n */\r\n function initialize(\r\n string calldata _name,\r\n string calldata _symbol,\r\n address _admin\r\n ) external initializer {\r\n require(_admin != address(0), ErrorCoded.ERR_ADMIN_ADDRESS_INVALID);\r\n\r\n __ERC20_init(_name, _symbol);\r\n __Pausable_init();\r\n __UUPSUpgradeable_init();\r\n __Context_init();\r\n __AccessControl_init();\r\n __AccessControlEnumerable_init();\r\n __ERC165_init();\r\n __ERC1967Upgrade_init();\r\n //custom features\r\n __MintAllocatedUpgradeable_init();\r\n __RestrictableUpgradeable_init();\r\n __SafeAccessControlEnumerable_init();\r\n //RBAC\r\n _grantRole(DEFAULT_ADMIN_ROLE, _admin);\r\n }\r\n\r\n /**\r\n * @dev Sets `amount` as the allowance of `spender` over the caller's tokens\r\n *\r\n * @param spender account being approved to spend the caller's tokens\r\n * @param amount quantity of tokens being approved to be spent\r\n */\r\n function approve(\r\n address spender,\r\n uint256 amount\r\n )\r\n public\r\n virtual\r\n override\r\n whenNotPaused\r\n whenNotRestricted(_msgSender())\r\n whenNotRestricted(spender)\r\n whenNotRestricted(tx.origin)\r\n returns (bool)\r\n {\r\n ERC20Upgradeable._approve(_msgSender(), spender, amount);\r\n return true;\r\n }\r\n\r\n /**\r\n * @dev Atomically increases the allowance granted to `spender` by the caller\r\n *\r\n * @param spender account being approved to spend the caller's tokens\r\n * @param addedValue the additional quantity of tokens being approved to be spent\r\n *\r\n * @notice This is an alternative to {approve} that can be used as a mitigation for\r\n * problems described in {IERC20-approve}.\r\n */\r\n function increaseAllowance(\r\n address spender,\r\n uint256 addedValue\r\n )\r\n public\r\n virtual\r\n override\r\n whenNotPaused\r\n whenNotRestricted(_msgSender())\r\n whenNotRestricted(spender)\r\n whenNotRestricted(tx.origin)\r\n returns (bool)\r\n {\r\n uint256 currentAllowance = allowance(_msgSender(), spender);\r\n require(\r\n type(uint256).max - currentAllowance >= addedValue,\r\n ErrorCoded.ERR_ARITHMETIC_OVERFLOW_ALLOWANCE\r\n );\r\n unchecked {\r\n ERC20Upgradeable._approve(\r\n _msgSender(),\r\n spender,\r\n currentAllowance + addedValue\r\n );\r\n }\r\n return true;\r\n }\r\n\r\n /**\r\n * @dev Atomically decreases the allowance granted to `spender` by the caller\r\n *\r\n * @param spender account that has been approved to spend the caller's tokens\r\n * @param subtractedValue the quantity of tokens to remove from the spender's approval\r\n *\r\n * @notice Spender's allowance is set to zero when the `subtractedValue` exceeds current allowance. This is allowed\r\n * to succeed as the caller still should be able to decrease the spender's allowance under a race condition when a\r\n * transfer decreases the spender's allowance.\r\n *\r\n * @notice A transfer restricted user is allowed to decrease allowances.\r\n * This is to prevent a compromised spender address from spending previously approved allowance immediately after the\r\n * restriction is lifted. No fund transfer is allowed when there is a transfer restriction.\r\n */\r\n function decreaseAllowance(\r\n address spender,\r\n uint256 subtractedValue\r\n ) public virtual override whenNotPaused returns (bool) {\r\n uint256 currentAllowance = allowance(_msgSender(), spender);\r\n uint256 newAllowance = currentAllowance > subtractedValue\r\n ? currentAllowance - subtractedValue\r\n : 0;\r\n\r\n ERC20Upgradeable._approve(_msgSender(), spender, newAllowance);\r\n return true;\r\n }\r\n\r\n /**\r\n * @dev Moves `amount` tokens from msg.sender() to `to`\r\n *\r\n * @param to recipient of transfer\r\n * @param amount quantity of tokens transferred\r\n */\r\n function transfer(\r\n address to,\r\n uint256 amount\r\n )\r\n public\r\n virtual\r\n override\r\n whenNotPaused\r\n whenNotRestricted(_msgSender())\r\n whenNotRestricted(to)\r\n whenNotRestricted(tx.origin)\r\n returns (bool)\r\n {\r\n address owner = _msgSender();\r\n ERC20Upgradeable._transfer(owner, to, amount);\r\n return true;\r\n }\r\n\r\n /**\r\n * @dev Moves amount tokens from `from` to `to` using the allowance mechanism. The `amount` is then deducted from the caller’s allowance\r\n *\r\n * @param from origin of transfer\r\n * @param to recipient of transfer\r\n * @param amount quantity of tokens transferred\r\n *\r\n * @notice Any address in the transfer restriction list is not allowed to transfer tokens\r\n */\r\n function transferFrom(\r\n address from,\r\n address to,\r\n uint256 amount\r\n )\r\n public\r\n virtual\r\n override\r\n whenNotPaused\r\n whenNotRestricted(_msgSender())\r\n whenNotRestricted(from)\r\n whenNotRestricted(to)\r\n whenNotRestricted(tx.origin)\r\n returns (bool)\r\n {\r\n ERC20Upgradeable._spendAllowance(from, _msgSender(), amount);\r\n ERC20Upgradeable._transfer(from, to, amount);\r\n return true;\r\n }\r\n\r\n // ################### Internal checks before transfers\r\n\r\n /**\r\n * @dev Functions and modifiers to run prior to allowing a transfer\r\n * @dev No account on the transfer restriction list should be allowed to send or receive\r\n */\r\n function _beforeTokenTransfer(\r\n address from,\r\n address to,\r\n uint256 amount\r\n ) internal override {\r\n require(to != address(this), ErrorCoded.ERR_INVALID_RECIPIENT);\r\n ERC20Upgradeable._beforeTokenTransfer(from, to, amount);\r\n }\r\n\r\n function _authorizeUpgrade(\r\n address newImplementation\r\n ) internal view override onlyRole(RoleManaged.UPGRADER_ROLE) {\r\n require(\r\n newImplementation.code.length > 0,\r\n ErrorCoded.ERR_CONTRACT_NOT_DEPLOYED\r\n );\r\n 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