第113篇 笔记-DateTime智能合约

Posted 2022-03-29 wonderBlock

关于日期时间的智能合约，包含闰年计算、时间戳与格式化日期时间的互相转换等功能；

合约代码：

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
 
contract DateTime 
        /*
         *  Date and Time utilities for ethereum contracts
         *
         */
        struct _DateTime 
                uint16 year;
                uint8 month;
                uint8 day;
                uint8 hour;
                uint8 minute;
                uint8 second;
                uint8 weekday;
        
 
        uint constant DAY_IN_SECONDS = 86400;
        uint constant YEAR_IN_SECONDS = 31536000;
        uint constant LEAP_YEAR_IN_SECONDS = 31622400;
 
        uint constant HOUR_IN_SECONDS = 3600;
        uint constant MINUTE_IN_SECONDS = 60;
 
        uint16 constant ORIGIN_YEAR = 1970;
 
        function isLeapYear(uint16 year) public pure returns (bool) 
                if (year % 4 != 0) 
                        return false;