Contract Overview
Balance:
0 ETH
ETH Value:
$0.00
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Contract Name:
FluxPriceFeed
Compiler Version
v0.8.10+commit.fc410830
Optimization Enabled:
Yes with 800 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity ^0.8.10; import "./interface/CLV2V3Interface.sol"; import "@openzeppelin/contracts/access/AccessControl.sol"; /** * @title Flux first-party price feed oracle * @author fluxprotocol.org * @notice Simple data posting on chain of a scalar value, compatible with Chainlink V2 and V3 aggregator interface */ contract FluxPriceFeed is AccessControl, CLV2V3Interface { bytes32 public constant VALIDATOR_ROLE = keccak256("VALIDATOR_ROLE"); uint32 public latestAggregatorRoundId; // Transmission records the answer from the transmit transaction at // time timestamp struct Transmission { int192 answer; // 192 bits ought to be enough for anyone uint64 timestamp; } mapping(uint32 => Transmission) /* aggregator round ID */ internal transmissions; /** * @param _validator the initial validator that can post data to this contract * @param _decimals answers are stored in fixed-point format, with this many digits of precision * @param __description short human-readable description of observable this contract's answers pertain to */ constructor( address _validator, uint8 _decimals, string memory __description ) { _setupRole(VALIDATOR_ROLE, _validator); decimals = _decimals; _description = __description; } /* * Versioning */ function typeAndVersion() external pure virtual returns (string memory) { return "FluxPriceFeed 1.1.0"; } /* * Transmission logic */ /** * @notice indicates that a new report was transmitted * @param aggregatorRoundId the round to which this report was assigned * @param answer value posted by validator * @param transmitter address from which the report was transmitted */ event NewTransmission(uint32 indexed aggregatorRoundId, int192 answer, address transmitter); /** * @notice details about the most recent report * @return _latestAnswer value from latest report * @return _latestTimestamp when the latest report was transmitted */ function latestTransmissionDetails() external view returns (int192 _latestAnswer, uint64 _latestTimestamp) { require(msg.sender == tx.origin, "Only callable by EOA"); return (transmissions[latestAggregatorRoundId].answer, transmissions[latestAggregatorRoundId].timestamp); } /** * @notice transmit is called to post a new report to the contract * @param _answer latest answer */ function transmit(int192 _answer) external { require(hasRole(VALIDATOR_ROLE, msg.sender), "Caller is not a validator"); // Check the report contents, and record the result latestAggregatorRoundId++; transmissions[latestAggregatorRoundId] = Transmission(_answer, uint64(block.timestamp)); emit NewTransmission(latestAggregatorRoundId, _answer, msg.sender); } /* * v2 Aggregator interface */ /** * @notice answer from the most recent report */ function latestAnswer() public view virtual override returns (int256) { return transmissions[latestAggregatorRoundId].answer; } /** * @notice timestamp of block in which last report was transmitted */ function latestTimestamp() public view virtual override returns (uint256) { return transmissions[latestAggregatorRoundId].timestamp; } /** * @notice Aggregator round in which last report was transmitted */ function latestRound() public view virtual override returns (uint256) { return latestAggregatorRoundId; } /** * @notice answer of report from given aggregator round * @param _roundId the aggregator round of the target report */ function getAnswer(uint256 _roundId) public view virtual override returns (int256) { if (_roundId > 0xFFFFFFFF) { return 0; } return transmissions[uint32(_roundId)].answer; } /** * @notice timestamp of block in which report from given aggregator round was transmitted * @param _roundId aggregator round of target report */ function getTimestamp(uint256 _roundId) public view virtual override returns (uint256) { if (_roundId > 0xFFFFFFFF) { return 0; } return transmissions[uint32(_roundId)].timestamp; } /* * v3 Aggregator interface */ string private constant V3_NO_DATA_ERROR = "No data present"; /** * @return answers are stored in fixed-point format, with this many digits of precision */ uint8 public immutable override decimals; /** * @notice aggregator contract version */ uint256 public constant override version = 1; string internal _description; /** * @notice human-readable description of observable this contract is reporting on */ function description() public view virtual override returns (string memory) { return _description; } /** * @notice details for the given aggregator round * @param _roundId target aggregator round. Must fit in uint32 * @return roundId _roundId * @return answer answer of report from given _roundId * @return startedAt timestamp of block in which report from given _roundId was transmitted * @return updatedAt timestamp of block in which report from given _roundId was transmitted * @return answeredInRound _roundId */ function getRoundData(uint80 _roundId) public view virtual override returns ( uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound ) { require(_roundId <= 0xFFFFFFFF, V3_NO_DATA_ERROR); Transmission memory transmission = transmissions[uint32(_roundId)]; return (_roundId, transmission.answer, transmission.timestamp, transmission.timestamp, _roundId); } /** * @notice aggregator details for the most recently transmitted report * @return roundId aggregator round of latest report * @return answer answer of latest report * @return startedAt timestamp of block containing latest report * @return updatedAt timestamp of block containing latest report * @return answeredInRound aggregator round of latest report */ function latestRoundData() public view virtual override returns ( uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound ) { roundId = latestAggregatorRoundId; // Skipped for compatability with existing FluxAggregator in which latestRoundData never reverts. // require(roundId != 0, V3_NO_DATA_ERROR); Transmission memory transmission = transmissions[uint32(roundId)]; return (roundId, transmission.answer, transmission.timestamp, transmission.timestamp, roundId); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.10; import "./CLInterface.sol"; import "./CLV3Interface.sol"; interface CLV2V3Interface is CLInterface, CLV3Interface {}
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "./IAccessControl.sol"; import "../utils/Context.sol"; import "../utils/Strings.sol"; import "../utils/introspection/ERC165.sol"; /** * @dev Contract module that allows children to implement role-based access * control mechanisms. This is a lightweight version that doesn't allow enumerating role * members except through off-chain means by accessing the contract event logs. Some * applications may benefit from on-chain enumerability, for those cases see * {AccessControlEnumerable}. * * Roles are referred to by their `bytes32` identifier. These should be exposed * in the external API and be unique. The best way to achieve this is by * using `public constant` hash digests: * * ``` * bytes32 public constant MY_ROLE = keccak256("MY_ROLE"); * ``` * * Roles can be used to represent a set of permissions. To restrict access to a * function call, use {hasRole}: * * ``` * function foo() public { * require(hasRole(MY_ROLE, msg.sender)); * ... * } * ``` * * Roles can be granted and revoked dynamically via the {grantRole} and * {revokeRole} functions. Each role has an associated admin role, and only * accounts that have a role's admin role can call {grantRole} and {revokeRole}. * * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means * that only accounts with this role will be able to grant or revoke other * roles. More complex role relationships can be created by using * {_setRoleAdmin}. * * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to * grant and revoke this role. Extra precautions should be taken to secure * accounts that have been granted it. */ abstract contract AccessControl is Context, IAccessControl, ERC165 { struct RoleData { mapping(address => bool) members; bytes32 adminRole; } mapping(bytes32 => RoleData) private _roles; bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00; /** * @dev Modifier that checks that an account has a specific role. Reverts * with a standardized message including the required role. * * The format of the revert reason is given by the following regular expression: * * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/ * * _Available since v4.1._ */ modifier onlyRole(bytes32 role) { _checkRole(role, _msgSender()); _; } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId); } /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) public view override returns (bool) { return _roles[role].members[account]; } /** * @dev Revert with a standard message if `account` is missing `role`. * * The format of the revert reason is given by the following regular expression: * * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/ */ function _checkRole(bytes32 role, address account) internal view { if (!hasRole(role, account)) { revert( string( abi.encodePacked( "AccessControl: account ", Strings.toHexString(uint160(account), 20), " is missing role ", Strings.toHexString(uint256(role), 32) ) ) ); } } /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) public view override returns (bytes32) { return _roles[role].adminRole; } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) { _grantRole(role, account); } /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) { _revokeRole(role, account); } /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been granted `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. */ function renounceRole(bytes32 role, address account) public virtual override { require(account == _msgSender(), "AccessControl: can only renounce roles for self"); _revokeRole(role, account); } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. Note that unlike {grantRole}, this function doesn't perform any * checks on the calling account. * * [WARNING] * ==== * This function should only be called from the constructor when setting * up the initial roles for the system. * * Using this function in any other way is effectively circumventing the admin * system imposed by {AccessControl}. * ==== */ function _setupRole(bytes32 role, address account) internal virtual { _grantRole(role, account); } /** * @dev Sets `adminRole` as ``role``'s admin role. * * Emits a {RoleAdminChanged} event. */ function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual { bytes32 previousAdminRole = getRoleAdmin(role); _roles[role].adminRole = adminRole; emit RoleAdminChanged(role, previousAdminRole, adminRole); } function _grantRole(bytes32 role, address account) private { if (!hasRole(role, account)) { _roles[role].members[account] = true; emit RoleGranted(role, account, _msgSender()); } } function _revokeRole(bytes32 role, address account) private { if (hasRole(role, account)) { _roles[role].members[account] = false; emit RoleRevoked(role, account, _msgSender()); } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.10; interface CLInterface { function latestAnswer() external view returns (int256); function latestTimestamp() external view returns (uint256); function latestRound() external view returns (uint256); function getAnswer(uint256 roundId) external view returns (int256); function getTimestamp(uint256 roundId) external view returns (uint256); event AnswerUpdated(int256 indexed current, uint256 indexed roundId, uint256 updatedAt); event NewRound(uint256 indexed roundId, address indexed startedBy, uint256 startedAt); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.10; interface CLV3Interface { function decimals() external view returns (uint8); function description() external view returns (string memory); function version() external view returns (uint256); // getRoundData and latestRoundData should both raise "No data present" // if they do not have data to report, instead of returning unset values // which could be misinterpreted as actual reported values. function getRoundData(uint80 _roundId) external view returns ( uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound ); function latestRoundData() external view returns ( uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound ); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev External interface of AccessControl declared to support ERC165 detection. */ interface IAccessControl { /** * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole` * * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite * {RoleAdminChanged} not being emitted signaling this. * * _Available since v3.1._ */ event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole); /** * @dev Emitted when `account` is granted `role`. * * `sender` is the account that originated the contract call, an admin role * bearer except when using {AccessControl-_setupRole}. */ event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Emitted when `account` is revoked `role`. * * `sender` is the account that originated the contract call: * - if using `revokeRole`, it is the admin role bearer * - if using `renounceRole`, it is the role bearer (i.e. `account`) */ event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) external view returns (bool); /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {AccessControl-_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) external view returns (bytes32); /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole(bytes32 role, address account) external; /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole(bytes32 role, address account) external; /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been granted `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. */ function renounceRole(bytes32 role, address account) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev String operations. */ library Strings { bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { // Inspired by OraclizeAPI's implementation - MIT licence // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); while (value != 0) { digits -= 1; buffer[digits] = bytes1(uint8(48 + uint256(value % 10))); value /= 10; } return string(buffer); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { if (value == 0) { return "0x00"; } uint256 temp = value; uint256 length = 0; while (temp != 0) { length++; temp >>= 8; } return toHexString(value, length); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _HEX_SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "./IERC165.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
{ "metadata": { "bytecodeHash": "none" }, "optimizer": { "enabled": true, "runs": 800 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "abi" ] } }, "libraries": {} }
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nction"},{"inputs":[],"name":"latestTimestamp","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"latestTransmissionDetails","outputs":[{"internalType":"int192","name":"_latestAnswer","type":"int192"},{"internalType":"uint64","name":"_latestTimestamp","type":"uint64"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"renounceRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"revokeRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"int192","name":"_answer","type":"int192"}],"name":"transmit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"typeAndVersion","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"version","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000053c335593fd25803acc88a63b93747a33be616d000000000000000000000000000000000000000000000000000000000000000800000000000000000000000000000000000000000000000000000000000000600000000000000000000000000000000000000000000000000000000000000009455448202f205553440000000000000000000000000000000000000000000000
-----Decoded View---------------
Arg [0] : _validator (address): 0x053c335593fd25803acc88a63b93747a33be616d
Arg [1] : _decimals (uint8): 8
Arg [2] : __description (string): ETH / USD
-----Encoded View---------------
5 Constructor Arguments found :
Arg [0] : 000000000000000000000000053c335593fd25803acc88a63b93747a33be616d
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000008
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000060
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000009
Arg [4] : 455448202f205553440000000000000000000000000000000000000000000000
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