Design of back-end GIN framework part of data sharing system based on blockchain and IPFS

This section briefly introduces the back-end part of the data sharing system, including directory structure, file functions, and project processes (generating key pairs, uploading and downloading files).

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1. Introduction to the back-end part of the file directory

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├── api 
│   ├── api.go               // 封装好的一些API接口
│   ├── config.yaml          // Fabric SDK使用的配置文件
│   └── rsa                  // 来源：https://github.com/wumansgy/goEncrypt
│       ├── getrsakey.go     // 生成密钥
│       └── rsacrypt.go      // 加解密、私钥转公钥等
├── controller				 
│   └── controller.go		 // 控制器（负责处理路由中的函数）
├── go.mod                   // Go模块文件，管理项目依赖项
├── go.sum                   // Go模块的校验文件
├── main.go                  // 入口文件
├── model 
│   └── model.go             // 存储数据的结构体使用
└── routers
    └── routers.go           // 路由请求