{ "contractName": "TimeMedianDataFeed", "abi": [ { "constant": true, "inputs": [ { "name": "_date", "type": "uint256" } ], "name": "dateHasResult", "outputs": [ { "name": "", "type": "bool" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "dataSource", "outputs": [ { "name": "", "type": "address" } ], "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": "latestResult", "outputs": [ { "name": "", "type": "bytes32" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "latestResultDate", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "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": "_date", "type": "uint256" } ], "name": "resultByDate", "outputs": [ { "name": "", "type": "bytes32" }, { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "totalResults", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [ { "name": "_dataSource", "type": "address" } ], "name": "initialize", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [ { "name": "_index", "type": "uint256" } ], "name": "indexHasResult", "outputs": [ { "name": "", "type": "bool" } ], "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": true, "inputs": [ { "name": "startDate", "type": "uint256" }, { "name": "endDate", "type": "uint256" } ], "name": "medianizeByTimeframe", "outputs": [ { "name": "medianValue", "type": "bytes32" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "name": "startIndex", "type": "uint256" }, { "name": "endIndex", "type": "uint256" } ], "name": "medianizeByIndices", "outputs": [ { "name": "medianValue", "type": "bytes32" } ], "payable": false, "stateMutability": "view", 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"source": "pragma solidity ^0.4.24;\n\nimport \"@levelk/tidbit/contracts/DataFeedOracles/DataFeedOracleBase.sol\";\nimport \"../TPSafeMath.sol\";\n\ncontract TimeMedianDataFeed is DataFeedOracleBase {\n using TPSafeMath for uint;\n\n function medianizeByTimeframe(uint startDate, uint endDate)\n public\n view\n returns (bytes32 medianValue)\n {\n require(startDate < endDate, 'startDate must be less than endDate');\n uint endIndex;\n uint startIndex;\n\n // find end date within dates array\n for (uint i = dates.length - 1; i > 0 && endIndex == 0; i--) {\n if (dates[i] <= endDate) {\n endIndex = i; // ONLY dates before the end date\n }\n }\n\n // require endIndex is more than 0\n require(endIndex > 0, 'dates outside of range of datafeed results');\n require(dates[endIndex] >= startDate, 'dates outside of range of datafeed results');\n\n // find start date within dates array\n for (uint j = endIndex; j >= 0 && startIndex == 0; j--) {\n if (dates[j] < startDate) {\n startIndex = j + 1; // no dates before the startDate\n }\n }\n\n medianValue = medianizeByIndices(startIndex, endIndex);\n }\n\n function medianizeByIndices(uint startIndex, uint endIndex)\n public\n view\n returns (bytes32 medianValue)\n {\n require(startIndex <= endIndex, 'startIndex must be less than or equal to endIndex');\n require(startIndex > 0, 'startIndex must be greater than 0');\n\n uint[] memory selectedDates = _sliceDatesArray(startIndex, endIndex);\n uint[] memory partitionedDates = _partitionDatesByResult(selectedDates);\n medianValue = _medianizeByDates(partitionedDates);\n }\n\n // Internal Functions\n\n function _medianizeByDates(uint[] orderedDates)\n internal\n view\n returns (bytes32 medianValue)\n {\n uint middleIndex = orderedDates.length / 2;\n uint middleDate = orderedDates[middleIndex];\n medianValue = resultsByDate[middleDate];\n }\n\n /**\n * @dev To minimize complexity, return the higher of the two middle\n * checkpoints in even-sized arrays instead of the average.\n */\n function _partitionDatesByResult(uint[] selectedDates)\n internal\n view\n returns (uint[])\n {\n uint k = selectedDates.length.div(2);\n uint left = 0;\n uint right = selectedDates.length.sub(1);\n\n while (left < right) {\n uint pivotIndex = left.add(right).div(2);\n uint pivotValue = selectedDates[pivotIndex];\n\n (selectedDates[pivotIndex], selectedDates[right]) = (selectedDates[right], selectedDates[pivotIndex]);\n uint storeIndex = left;\n for (uint i = left; i < right; i++) {\n if (_isLessThan(selectedDates[i], pivotValue)) {\n (selectedDates[storeIndex], selectedDates[i]) = (selectedDates[i], selectedDates[storeIndex]);\n storeIndex++;\n }\n }\n\n (selectedDates[storeIndex], selectedDates[right]) = (selectedDates[right], selectedDates[storeIndex]);\n if (storeIndex < k) {\n left = storeIndex.add(1);\n } else {\n right = storeIndex;\n }\n }\n\n return selectedDates;\n }\n\n function _sliceDatesArray(uint startIndex, uint endIndex)\n internal\n view\n returns (uint[])\n {\n uint length = endIndex - startIndex + 1;\n uint[] memory arr = new uint[](length);\n uint index = 0;\n for (uint i = startIndex; i <= endIndex; i++) {\n arr[index] = dates[i];\n index++;\n }\n return arr;\n }\n\n function _isLessThan(uint date1, uint date2)\n internal\n view\n returns (bool)\n {\n return uint(resultsByDate[date1]) < uint(resultsByDate[date2]);\n }\n}\n", "sourcePath": "/Users/mfcalvanese/dev/eth/token-price-oracles/contracts/DataFeeds/TimeMedianDataFeed.sol", "ast": { "absolutePath": "/Users/mfcalvanese/dev/eth/token-price-oracles/contracts/DataFeeds/TimeMedianDataFeed.sol", "exportedSymbols": { "TimeMedianDataFeed": [ 414 ] }, "id": 415, "nodeType": "SourceUnit", "nodes": [ { "id": 1, "literals": [ "solidity", "^", "0.4", ".24" ], "nodeType": "PragmaDirective", "src": "0:24:0" }, { "absolutePath": "@levelk/tidbit/contracts/DataFeedOracles/DataFeedOracleBase.sol", "file": "@levelk/tidbit/contracts/DataFeedOracles/DataFeedOracleBase.sol", "id": 2, "nodeType": "ImportDirective", "scope": 415, "sourceUnit": 1650, "src": "26:73:0", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "/Users/mfcalvanese/dev/eth/token-price-oracles/contracts/TPSafeMath.sol", "file": "../TPSafeMath.sol", "id": 3, "nodeType": "ImportDirective", "scope": 415, "sourceUnit": 1261, "src": "100:27:0", "symbolAliases": [], "unitAlias": "" }, { "baseContracts": [ { "arguments": null, "baseName": { "contractScope": null, "id": 4, "name": "DataFeedOracleBase", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 1649, "src": "160:18:0", "typeDescriptions": { "typeIdentifier": "t_contract$_DataFeedOracleBase_$1649", "typeString": "contract DataFeedOracleBase" } }, "id": 5, "nodeType": "InheritanceSpecifier", "src": "160:18:0" } ], "contractDependencies": [ 1649, 1699, 1762 ], "contractKind": "contract", "documentation": null, "fullyImplemented": true, "id": 414, "linearizedBaseContracts": [ 414, 1649, 1699, 1762 ], "name": "TimeMedianDataFeed", "nodeType": 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