@levelk/token-price-oracles

{ "contractName": "DataFeedOracleBase", "abi": [ { "constant": true, "inputs": [], "name": "dataSource", "outputs": [ { "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "anonymous": false, "inputs": [ { "indexed": false, "name": "_result", "type": "bytes32" }, { "indexed": false, "name": "_date", "type": "uint256" }, { "indexed": false, "name": "_index", "type": "uint256" }, { "indexed": false, "name": "_sender", "type": "address" } ], "name": "ResultSet", "type": "event" }, { "constant": false, "inputs": [ { "name": "_dataSource", "type": "address" } ], "name": "initialize", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "name": "_result", "type": "bytes32" }, { "name": "_date", "type": "uint256" } ], "name": "setResult", "outputs": [ { "name": "index", "type": "uint256" } ], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [], "name": "totalResults", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "name": "_index", "type": "uint256" } ], "name": "resultByIndex", "outputs": [ { "name": "", "type": "bytes32" }, { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "name": "_date", "type": "uint256" } ], "name": "resultByDate", "outputs": [ { "name": "", "type": "bytes32" }, { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "latestResultDate", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "latestResult", "outputs": [ { "name": "", "type": "bytes32" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "name": "_index", "type": "uint256" } ], "name": "indexHasResult", "outputs": [ { "name": "", "type": "bool" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "name": "_date", "type": "uint256" } ], "name": "dateHasResult", "outputs": [ { "name": "", "type": "bool" } ], "payable": false, "stateMutability": "view", "type": "function" } ], "bytecode": 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"source": "pragma solidity ^0.4.24;\r\n\r\nimport \"./IDataFeedOracle.sol\";\r\nimport \"../Initializer.sol\";\r\n\r\n/**\r\n * @title DataFeedOracleBase\r\n * @dev Allows a data source address to set bytes32 result values by date. Result values\r\n * can be publicly read by date and by index.\r\n */\r\ncontract DataFeedOracleBase is Initializer, IDataFeedOracle {\r\n\r\n uint256[] dates;\r\n\r\n mapping(uint256 => bytes32) resultsByDate;\r\n\r\n mapping(uint256 => uint256) indicesByDate;\r\n\r\n address public dataSource;\r\n\r\n event ResultSet(bytes32 _result, uint256 _date, uint256 _index, address _sender);\r\n\r\n /**\r\n * @dev Throws if _date is not current or past.\r\n * @param _date Date to check against the `now` value.\r\n */\r\n modifier onlyBefore(uint256 _date) {\r\n require(_date <= now, \"Date cannot be in the future\");\r\n _;\r\n }\r\n\r\n /**\r\n * @dev Throws if the data source is not the caller.\r\n */\r\n modifier onlyDataSource() {\r\n require(msg.sender == dataSource, \"The caller is not the data source\");\r\n _;\r\n }\r\n\r\n /**\r\n * @dev Initializes DataFeedOracleBase.\r\n * @param _dataSource The address that is allowed to set results.\r\n */\r\n function initialize(address _dataSource) public initializer {\r\n require(_dataSource != address(0), \"_dataSource cannot be address(0)\");\r\n dataSource = _dataSource;\r\n dates.push(0); // The first valid result index starts at 1\r\n }\r\n\r\n /**\r\n * @dev Sets a bytes32 result for the given date.\r\n * @param _result The result being set.\r\n * @param _date The date for the result.\r\n * @return The index of the result.\r\n */\r\n function setResult(bytes32 _result, uint256 _date)\r\n public\r\n onlyDataSource()\r\n onlyBefore(_date)\r\n returns (uint256 index)\r\n {\r\n if (dates.length > 0) {\r\n require(_date > dates[totalResults()]);\r\n }\r\n _setResult(_result, _date);\r\n return totalResults();\r\n }\r\n\r\n /**\r\n * @return The total number of results that have been set.\r\n */\r\n function totalResults() public view returns (uint256) {\r\n return dates.length - 1;\r\n }\r\n\r\n /**\r\n * @dev Returns a result and a date, given an index. Throws if no result exists for\r\n * the given index.\r\n * @param _index The index of the result.\r\n * @return The result value and the date of the result.\r\n */\r\n function resultByIndex(uint256 _index) public view returns (bytes32, uint256) {\r\n require(indexHasResult(_index), \"No result set for _index\");\r\n return (resultsByDate[dates[_index]], dates[_index]);\r\n }\r\n\r\n /**\r\n * @dev Returns a result and an index, given a date. Throws if no result exists for\r\n * the given date.\r\n * @param _date The date of the result.\r\n * @return The result value and the index of the result.\r\n */\r\n function resultByDate(uint256 _date) public view returns (bytes32, uint256) {\r\n require(dateHasResult(_date), \"No result set for _date\");\r\n return (resultsByDate[_date], indicesByDate[_date]);\r\n }\r\n\r\n /**\r\n * @notice Throws if no results have been set.\r\n * @return The date of the last result that was set.\r\n */\r\n function latestResultDate()\r\n public view\r\n returns (uint256)\r\n {\r\n return (dates[totalResults()]);\r\n }\r\n\r\n /**\r\n * @notice Throws if no results have been set.\r\n * @return The last result that was set.\r\n */\r\n function latestResult()\r\n public view\r\n returns (bytes32)\r\n {\r\n return resultsByDate[dates[totalResults()]];\r\n }\r\n\r\n /**\r\n * @param _index The index of a result.\r\n * @return `true` if a result for the given index exists.\r\n */\r\n function indexHasResult(uint256 _index) public view returns (bool) {\r\n require(_index > 0, \"_index must be greater than 0\");\r\n return dates.length > _index;\r\n }\r\n\r\n /**\r\n * @param _date The date of the data feed\r\n * @return `true` if a result has been set for the given date.\r\n */\r\n function dateHasResult(uint256 _date) public view returns (bool) {\r\n return indicesByDate[_date] > 0;\r\n }\r\n\r\n /**\r\n * @dev Sets a bytes32 result value and a date for the result.\r\n * @param _result The result to set.\r\n * @param _date The date of the result.\r\n */\r\n function _setResult(bytes32 _result, uint256 _date) internal {\r\n resultsByDate[_date] = _result;\r\n dates.push(_date);\r\n indicesByDate[_date] = totalResults();\r\n\r\n _resultWasSet(_result, _date);\r\n\r\n emit ResultSet(_result, _date, totalResults(), msg.sender);\r\n }\r\n\r\n /**\r\n * @dev Unimplemented function meant to be overidden in subclasses.\r\n */\r\n function _resultWasSet(bytes32 /*_result*/, uint256 /*_date*/) internal {\r\n // optional override\r\n }\r\n\r\n}\r\n", "sourcePath": "@levelk/tidbit/contracts/DataFeedOracles/DataFeedOracleBase.sol", "ast": { "absolutePath": "@levelk/tidbit/contracts/DataFeedOracles/DataFeedOracleBase.sol", "exportedSymbols": { "DataFeedOracleBase": [ 1649 ] }, "id": 1650, "nodeType": "SourceUnit", "nodes": [ { "id": 1358, "literals": [ "solidity", "^", "0.4", ".24" ], "nodeType": "PragmaDirective", "src": "0:24:10" }, { "absolutePath": "@levelk/tidbit/contracts/DataFeedOracles/IDataFeedOracle.sol", "file": "./IDataFeedOracle.sol", "id": 1359, "nodeType": "ImportDirective", "scope": 1650, "sourceUnit": 1700, "src": "28:31:10", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@levelk/tidbit/contracts/Initializer.sol", "file": "../Initializer.sol", "id": 1360, "nodeType": "ImportDirective", "scope": 1650, "sourceUnit": 1763, "src": "61:28:10", "symbolAliases": [], "unitAlias": "" }, { "baseContracts": [ { "arguments": null, "baseName": { "contractScope": null, "id": 1361, "name": "Initializer", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 1762, "src": "306:11:10", "typeDescriptions": { "typeIdentifier": "t_contract$_Initializer_$1762", "typeString": "contract Initializer" } }, "id": 1362, "nodeType": "InheritanceSpecifier", "src": "306:11:10" }, { "arguments": null, "baseName": { "contractScope": null, "id": 1363, "name": "IDataFeedOracle", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 1699, "src": "319:15:10", "typeDescriptions": { "typeIdentifier": "t_contract$_IDataFeedOracle_$1699", "typeString": "contract IDataFeedOracle" } }, "id": 1364, "nodeType": "InheritanceSpecifier", "src": "319:15:10" } ], "contractDependencies": [ 1699, 1762 ], "contractKind": "contract", "documentation": "@title DataFeedOracleBase\r\n@dev Allows a data source address to set bytes32 result values by date. 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