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"source": "pragma solidity ^0.4.24;\n\n\n/**\n * Contract code based on pipemerrian's Date Time Smart contract, now available as a library.\n * https://github.com/pipermerriam/ethereum-datetime/blob/master/contracts/DateTime.sol\n * Provide Datetime utils on Ethereum Smart Contracts\n */\n\nlibrary DateTime {\n \n struct _DateTime {\n uint16 year;\n uint8 month;\n uint8 day;\n uint8 hour;\n uint8 minute;\n uint8 second;\n uint8 weekday;\n }\n\n function getYear(uint _timestamp) public pure returns (uint16) {\n uint256 secondsAccountedFor = 0;\n uint16 year;\n uint256 numLeapYears;\n year = uint16(originYear() + _timestamp / yearInSeconds());\n numLeapYears = leapYearsBefore(year) - leapYearsBefore(originYear());\n\n secondsAccountedFor += leapYearInSeconds() * numLeapYears;\n secondsAccountedFor += yearInSeconds() * (year - originYear() - numLeapYears);\n\n while (secondsAccountedFor > _timestamp) {\n if (isLeapYear(uint16(year - 1))) {\n secondsAccountedFor -= leapYearInSeconds();\n }\n else {\n secondsAccountedFor -= yearInSeconds();\n }\n year -= 1;\n }\n return year;\n }\n\n function getMonth(uint256 _timestamp) public pure returns (uint8) {\n return parseTimestamp(_timestamp).month;\n }\n\n function getDay(uint256 _timestamp) public pure returns (uint8) {\n return parseTimestamp(_timestamp).day;\n }\n\n function getHour(uint256 _timestamp) public pure returns (uint8) {\n return uint8((_timestamp / 60 / 60) % 24);\n }\n\n function getMinute(uint256 _timestamp) public pure returns (uint8) {\n return uint8((_timestamp / 60) % 60);\n }\n\n function getSecond(uint256 _timestamp) public pure returns (uint8) {\n return uint8(_timestamp % 60);\n }\n\n function getWeekday(uint256 _timestamp) public pure returns (uint8) {\n return uint8((_timestamp / dayInSeconds() + 4) % 7);\n }\n\n function getDaysInMonth(uint16 _month, uint16 _year) public pure returns (uint8) {\n if (_month == 1 || _month == 3 || _month == 5 || _month == 7 || _month == 8 || _month == 10 || _month == 12) {\n return 31;\n }\n else if (_month == 4 || _month == 6 || _month == 9 || _month == 11) {\n return 30;\n }\n else if (isLeapYear(_year)) {\n return 29;\n }\n else {\n return 28;\n }\n }\n\n function diffYears(uint256 _x, uint256 _y) public pure returns (uint256) {\n require(getYear(_x) >= getYear(_y), 'First argument provided must be > second argument');\n return uint256(getYear(_x) - getYear(_y));\n }\n\n function diffMonths(uint256 _x, uint256 _y) public pure returns (uint256) {\n require(getYear(_x) >= getYear(_y), 'First argument provided must be > second argument');\n uint8 delta = getMonth(_x) > getMonth(_y) ? 1 : 0;\n return (diffYears(_x, _y) - delta) * 12 + uint256(getMonth(_x) - getMonth(_y)) ;\n }\n\n function diffDays(uint256 _x, uint256 _y) public pure returns (uint256) {\n require(_x > _y);\n return(_x - _y) / dayInSeconds();\n }\n\n function isLeapYear(uint16 year) public pure returns (bool) {\n if (year % 4 != 0) {\n return false;\n }\n if (year % 100 != 0) {\n return true;\n }\n if (year % 400 != 0) {\n return false;\n }\n return true;\n }\n \n function originYear() public pure returns(uint16) {\n return 1970;\n }\n \n function dayInSeconds() public pure returns (uint256) {\n return 86400;\n }\n \n function yearInSeconds() public pure returns (uint256) {\n return 31536000;\n }\n \n function leapYearInSeconds() public pure returns (uint256) { \n return 31622400;\n }\n \n function minuteInSeconds() public pure returns(uint256) {\n return 60;\n }\n \n function hourInSeconds() public pure returns(uint256) { \n return 3600;\n }\n\n function leapYearsBefore(uint256 _year) public pure returns (uint256) {\n _year -= 1;\n return _year / 4 - _year / 100 + _year / 400;\n }\n\n\n function parseTimestamp(uint256 _timestamp) internal pure returns (_DateTime dt) {\n uint256 secondsAccountedFor = 0;\n uint256 buf;\n uint8 i;\n\n dt.year = getYear(_timestamp);\n buf = leapYearsBefore(dt.year) - leapYearsBefore(originYear());\n\n secondsAccountedFor += leapYearInSeconds() * buf;\n secondsAccountedFor += yearInSeconds() * (dt.year - originYear() - buf);\n uint256 secondsInMonth;\n for (i = 1; i <= 12; i++) {\n secondsInMonth = dayInSeconds() * getDaysInMonth(i, dt.year);\n if (secondsInMonth + secondsAccountedFor > _timestamp) {\n dt.month = i;\n break;\n }\n secondsAccountedFor += secondsInMonth;\n }\n\n for (i = 1; i <= getDaysInMonth(dt.month, dt.year); i++) {\n if (dayInSeconds() + secondsAccountedFor > _timestamp) {\n dt.day = i;\n break;\n }\n secondsAccountedFor += dayInSeconds();\n }\n\n dt.hour = getHour(_timestamp);\n dt.minute = getMinute(_timestamp);\n dt.second = getSecond(_timestamp);\n dt.weekday = getWeekday(_timestamp);\n }\n}\n\n", "sourcePath": "/Users/carlosbuendia/Documents/Projects/consensys/Frontier/cron/contracts/calendar/DateTime.sol", "ast": { "absolutePath": "/Users/carlosbuendia/Documents/Projects/consensys/Frontier/cron/contracts/calendar/DateTime.sol", "exportedSymbols": { "DateTime": [ 776 ] }, "id": 777, "nodeType": "SourceUnit", "nodes": [ { "id": 112, "literals": [ "solidity", "^", "0.4", ".24" ], "nodeType": "PragmaDirective", "src": "0:24:3" }, { "baseContracts": [], "contractDependencies": [], "contractKind": "library", "documentation": "Contract code based on pipemerrian's Date Time Smart contract, now available as a library.\nhttps://github.com/pipermerriam/ethereum-datetime/blob/master/contracts/DateTime.sol\nProvide Datetime utils on Ethereum Smart Contracts", "fullyImplemented": true, "id": 776, "linearizedBaseContracts": [ 776 ], "name": "DateTime", "nodeType": "ContractDefinition", "nodes": [ { "canonicalName": "DateTime._DateTime", "id": 127, "members": [ { "constant": false, "id": 114, "name": "year", "nodeType": "VariableDeclaration", "scope": 127, "src": "325:11:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint16", "typeString": "uint16" }, "typeName": { "id": 113, "name": "uint16", "nodeType": "ElementaryTypeName", "src": "325:6:3", "typeDescriptions": { "typeIdentifier": "t_uint16", "typeString": "uint16" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 116, "name": "month", "nodeType": "VariableDeclaration", "scope": 127, "src": "346:11:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "typeName": { "id": 115, "name": "uint8", "nodeType": "ElementaryTypeName", "src": "346:5:3", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 118, "name": "day", "nodeType": "VariableDeclaration", "scope": 127, "src": "367:9:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "typeName": { "id": 117, "name": "uint8", "nodeType": "ElementaryTypeName", "src": "367:5:3", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 120, "name": "hour", "nodeType": "VariableDeclaration", "scope": 127, "src": "386:10:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "typeName": { "id": 119, "name": "uint8", "nodeType": "ElementaryTypeName", "src": "386:5:3", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 122, "name": "minute", "nodeType": "VariableDeclaration", "scope": 127, "src": "406:12:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "typeName": { "id": 121, "name": "uint8", "nodeType": "ElementaryTypeName", "src": "406:5:3", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 124, "name": "second", "nodeType": "VariableDeclaration", "scope": 127, "src": "428:12:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "typeName": { "id": 123, "name": "uint8", "nodeType": "ElementaryTypeName", "src": "428:5:3", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 126, "name": "weekday", "nodeType": "VariableDeclaration", "scope": 127, "src": "450:13:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "typeName": { "id": 125, "name": "uint8", "nodeType": "ElementaryTypeName", "src": "450:5:3", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "value": null, "visibility": "internal" } ], "name": "_DateTime", "nodeType": "StructDefinition", "scope": 776, "src": "298:172:3", "visibility": "public" }, { "body": { "id": 218, "nodeType": "Block", "src": "540:725:3", "statements": [ { "assignments": [ 135 ], "declarations": [ { "constant": false, "id": 135, "name": "secondsAccountedFor", "nodeType": "VariableDeclaration", "scope": 219, "src": "550:27:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 134, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "550:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "id": 137, "initialValue": { "argumentTypes": null, "hexValue": "30", "id": 136, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "580:1:3", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "nodeType": "VariableDeclarationStatement", "src": "550:31:3" }, { "assignments": [], "declarations": [ { "constant": false, "id": 139, "name": "year", "nodeType": "VariableDeclaration", "scope": 219, "src": "591:11:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint16", "typeString": "uint16" }, "typeName": { "id": 138, "name": "uint16", "nodeType": "ElementaryTypeName", "src": "591:6:3", "typeDescriptions": { "typeIdentifier": "t_uint16", "typeString": "uint16" } }, "value": null, "visibility": "internal" } ], "id": 140, "initialValue": null, "nodeType": "VariableDeclarationStatement", "src": "591:11:3" }, { "assignments": [], "declarations": [ { "constant": false, "id": 142, "name": "numLeapYears", "nodeType": "VariableDeclaration", "scope": 219, "src": "612:20:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": 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