360 lines
11 KiB
Markdown
360 lines
11 KiB
Markdown
---
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title: 十份代码实例
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createTime: 2025/10/10 11:07:11
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permalink: /programming/solidity/analysis/case-analysis/
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password: simeng
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---
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## 题目一
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## 题目二
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## 题目三
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## 题目四
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原题：
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1.编写原材料接口newMaterial，初始化原材料信息，返回合约地址，并实现原材料信息上链功能。
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2.编写获取存原材料接口getMaterial，根据合约地址获取原材料信息
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3.编写食品物流上链接口addLogistic，实现食品物流信息上链功能
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4.编写获取食品物流信息的接口getLogistics，根据食品产品编号获取物流信息
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::: code-tabs
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@tab Logistics.sol
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```solidity
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pragma solidity 0.6.10;
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pragma experimental ABIEncoderV2;
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contract Logistics {
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struct LogisticsData {
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address cargo; //货物合约地址
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address orgin; //货物上级合约地址
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address destination; //货物下级合约地址
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string memo; //备注信息
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uint createdAt; //创建时间
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uint queryCount; //已查询次数
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}
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LogisticsData[] private _logisticsData; //全部物流信息数组
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uint public recordCount;//所有记录条数
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uint public queryCount;//所有查询次数
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//可自行添加形参和返回值
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function addLogistics(address _cargo,address _orgin,【请补充】) public {
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//TODO：”请补充缺失代码
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}
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//可自行添加形参和返回值
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function getLogisticsInfo(address _cargo) public returns(LogisticsData[] memory _cargoLogisticsData) {
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//TODO：”请补充缺失代码
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}
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}
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```
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@tab Material.sol
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```solidity
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pragma solidity 0.6.10;
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contract Material {
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struct Material {
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address owner;
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string name;
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string id;
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string memo;
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uint createdAt;
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bool exist;
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}
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mapping(string => Material) public materials;
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//可自行添加形参和返回值
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function newMaterial(string memory _name,string memory _id,【请补充】) public {
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//TODO：”请补充缺失代码
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}
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//可自行添加形参和返回值
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function getMaterial(string memory id) public view returns(【请补充】) {
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//TODO：”请补充缺失代码
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}
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}
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```
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:::
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参考答案：
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::: code-tabs
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@tab Logistics.sol
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```solidity
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pragma solidity 0.6.10;
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pragma experimental ABIEncoderV2;
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contract Logistics {
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struct LogisticsData {
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address cargo; //货物合约地址
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address orgin; //货物上级合约地址
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address destination; //货物下级合约地址
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string memo; //备注信息
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uint createdAt; //创建时间
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uint queryCount; //已查询次数
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}
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LogisticsData[] private _logisticsData; //全部物流信息数组
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uint public recordCount;//所有记录条数
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uint public queryCount;//所有查询次数
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//可自行添加形参和返回值
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function addLogistics(address _cargo,address _orgin,【请补充】) public {
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//TODO：”请补充缺失代码
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}
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//可自行添加形参和返回值
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function getLogisticsInfo(address _cargo) public returns(LogisticsData[] memory _cargoLogisticsData) {
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//TODO：”请补充缺失代码
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}
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}
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```
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@tab Material.sol
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```solidity
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pragma solidity 0.6.10;
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contract Material {
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struct Material {
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address owner;
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string name;
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string id;
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string memo;
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uint createdAt;
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bool exist;
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}
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mapping(string => Material) public materials;
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//可自行添加形参和返回值
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function newMaterial(string memory _name,string memory _id,【请补充】) public {
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//TODO：”请补充缺失代码
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}
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//可自行添加形参和返回值
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function getMaterial(string memory id) public view returns(【请补充】) {
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//TODO：”请补充缺失代码
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}
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}
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```
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:::
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## 题目五
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## 题目六
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## 题目七
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原题：
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**子任务2-2-1：航班延误保险购买合约编码（5分）**
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（1）编写航班保险购买上链接口，完成只有购买机票的用户可以购买保险、必须缴纳正确的保费金额、购买保险的时间不能超过购买机票后的0.5小时的功能，符合条件则用户可以购买保险，将用户购买保险状态上链；（3分）
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（2）编写退保接口，完成保险公司预存赔偿金后，用户无法退保，反之用户可退保的功能，将用户退保状态上链，并退还用户保费功能。（2分）
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**子任务2-2-2：航班信息存证上链合约编码**
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（1）编写获取航班信息接口，实现依据航班号获得航班号对应的计划起飞时间、实际起飞时间、到达时间、是否延误状态的功能；
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（2）编写判断航班是否延误接口，实现依据航班号获得航班号对应的航班是否延误，得到航班是否延误的结果功能。
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**子任务2-2-3：航班延误险理赔合约编码**
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（1）编写客户理赔接口，实现如果航班延误超过4小时，将赔偿金赔偿给乘客的功能；
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（2）编写保险公司收取保费接口，实现如果航班没有延误或者延误时间少于4小时，将保费转账给保险公司，并退还赔偿金的功能。
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::: code-tabs
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@tab Claims.sol
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```solidity
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pragma solidity ^0.6.10;
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import "./FlightDelayInsurance.sol";
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contract Claims is FlightDelayInsurance{
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// 定义航班信息结构体
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struct Flight {
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uint256 departureTime; // 航班出发时间
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uint256 delayTime; // 航班延误时间
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bool isDelayed; // 航班是否延误
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bool isInsured; // 航班是否购买保险
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}
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// 定义保险公司地址
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address public insuranceCompany;
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// 定义航班信息映射
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mapping(bytes32 => Flight) public flights;
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// 定义购买保险事件
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event BuyInsurance(bytes32 flightKey, address passenger, uint256 premium);
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// 定义航班延误事件
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event FlightDelay(bytes32 flightKey, uint256 delayTime);
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// 定义理赔事件
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event Claim(bytes32 flightKey, address passenger, uint256 amount);
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// 定义保险公司预存的赔偿金
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uint256 public compensationNew;
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// 构造函数，初始化保险公司地址和赔偿金
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constructor() FlightDelayInsurance(platformS,airlineV,insuranceCompanyC,premium,compensation) public {
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insuranceCompany = msg.sender;
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compensationNew = compensation;
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}
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// 更新航班信息函数
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function updateFlight(bytes32 flightKey, uint256 departureTime, uint256 delayTime, bool isDelayed) payable public {
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// 判断调用者是否为保险公司
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require(msg.sender == insuranceCompany, "Only insurance company can update flight information");
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// 更新航班信息
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flights[flightKey].departureTime = departureTime;
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flights[flightKey].isDelayed = isDelayed;
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/*********** 客户理赔接口 **********/
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//任务2-2-3，请编写合约代码
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/********** 客户理赔接口 ***********/
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/*********** 保险公司收取保费接口开发 **********/
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//任务2-2-3，请编写合约代码
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/********** 保险公司收取保费接口开发 ***********/
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// 触发航班延误事件
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emit FlightDelay(flightKey, delayTime);
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}
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}
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```
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@tab FlightDelayInsurance.sol
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```solidity
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pragma solidity ^0.6.10;
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contract FlightDelayInsurance {
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address public platformS; // 平台S的地址
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address public airlineV; // 航空公司V的地址
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address public insuranceCompanyC; // 保险公司C的地址
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uint public premium; // 保险费
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uint public compensation; // 赔偿金额
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uint public purchaseTime; // 购买保险的时间
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uint public depositTime; // 存入赔偿金额的时间
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bool public purchased; // 是否购买了保险
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bool public deposited; // 是否存入了赔偿金额
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mapping(address => bool) public insured; // 已退保的用户
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mapping(address => bool) public policy; // 已生成保单的用户
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mapping(address => bool) public purchasedTicket; // 已购买机票的用户
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constructor(address _platformS, address _airlineV, address _insuranceCompanyC, uint _premium, uint _compensation) public {
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platformS = _platformS; // 初始化平台S的地址
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airlineV = _airlineV; // 初始化航空公司V的地址
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insuranceCompanyC = _insuranceCompanyC; // 初始化保险公司C的地址
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premium = _premium; // 初始化保险费
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compensation = _compensation; // 初始化赔偿金额
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}
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function purchaseTicket() public {
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require(!purchasedTicket[msg.sender], "Ticket has already been purchased"); // 该用户已购买机票
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purchasedTicket[msg.sender] = true; // 标记该用户已购买机票
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purchaseTime = block.timestamp;
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}
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/*********** 航班保险购买上链接口开发 **********/
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//任务2-2-1，请编写合约代码
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/********** 航班保险购买上链接口开发 ***********/
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function depositCompensation() public payable {
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require(msg.sender == insuranceCompanyC, "Only insurance company C can deposit compensation"); // 只有保险公司C可以存入赔偿金额
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require(msg.value == compensation, "Compensation amount is incorrect"); // 赔偿金额不正确
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require(block.timestamp < depositTime + 2 hours, "Deposit time has expired"); // 存入赔偿金额的时间已过期
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deposited = true; // 标记已存入赔偿金额
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}
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/*********** 退保接口开发 **********/
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//任务2-2-1，请编写合约代码
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/********** 退保接口开发 ***********/
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function generatePolicy() public {
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require(deposited, "Compensation has not been deposited"); // 赔偿金额未存入，无法生成保单
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require(msg.sender == platformS, "Only platform S can generate policy"); // 只有平台S可以生成保单
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require(!policy[msg.sender], "Policy has already been generated"); // 该用户已生成保单
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policy[msg.sender] = true; // 标记该用户已生成保单
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}
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}
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```
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@tab FlightManagement.sol
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```solidity
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pragma solidity ^0.6.10;
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contract FlightManagement {
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// 航班结构体
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struct Flight {
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string flightNumber; // 航班号
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uint256 scheduledDepartureTime; // 计划起飞时间
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uint256 actualDepartureTime; // 实际起飞时间
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uint256 arrivalTime; // 到达时间
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bool delayed; // 是否延误
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}
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// 航班号到航班信息的映射
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mapping(string => Flight) flights;
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// 添加航班
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function addFlight(string memory _flightNumber, uint256 _scheduledDepartureTime, uint256 _arrivalTime) public {
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flights[_flightNumber] = Flight(_flightNumber, _scheduledDepartureTime, 0, _arrivalTime, false);
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}
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// 更新实际起飞时间
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function updateActualDepartureTime(string memory _flightNumber, uint256 _actualDepartureTime) public {
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flights[_flightNumber].actualDepartureTime = _actualDepartureTime;
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}
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/*********** 获取航班信息接口开发 **********/
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//任务2-2-2，请编写合约代码
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/********** 获取航班信息接口开发 ***********/
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/*********** 编写判断航班是否延误接口开发 **********/
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//任务2-2-2，请编写合约代码
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/********** 编写判断航班是否延误接口开发 ***********/
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}
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```
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:::
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## 题目八
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## 题目九
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## 题目十
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