3_HelloWorld

• move项目结构 https://github.com/sui-foundation/sui-move-intro-course/blob/main/unit-one/lessons/2_sui_project_structure.md
• 自定义结构体和特性: https://github.com/sui-foundation/sui-move-intro-course/blob/main/unit-one/lessons/3_custom_types_and_abilities.md
• 函数: https://github.com/sui-foundation/sui-move-intro-course/blob/main/unit-one/lessons/4_functions.md
• https://github.com/sui-foundation/sui-move-intro-course/blob/main/unit-one/lessons/5_contract_deployment.md

基础理论知识

• Sui以Object(对象)为核心(Object有点类似Bitcoin中的UTXO)

• Sui标准库发布在0x2下面

• 发布的模块是不可变Object(immutable object),

  • 不可变Object:
    • 不能被修改+不能被转移+不能被删除
    • 任何人都可以使用

• 结构体的特性(abilities)

  • copy: value can be copied (or cloned by value)
  • drop: value can be dropped by the end of the scope
  • key: value can be used as a key for global storage operations
  • store: value can be held inside a struct in global storage

• 函数可见性：

  • private: the default visibility of a function; it can only be accessed by functions inside the same module
  • public: the function is accessible by functions inside the same module and by functions defined in another module
  • public(package): the function is accessible by functions of modules inside the same package

HelloWorld

• 创建move项目: sui move new hello_world

• 将 Move.toml中的 rev = "framework/testnet" 改为 rev = "framework/devnet"

• 在 source/hello_world.move 输入完整代码

  module hello_world::hello_world {
  
      use std::string;
  
      // 自定义结构体
      /// An object that contains an arbitrary string
      public struct HelloWorldObject has key, store {
          id: UID,
          /// A string contained in the object
          text: string::String
      }
  
      #[lint_allow(self_transfer)]
      public fun mint(ctx: &mut TxContext) {
          let object = HelloWorldObject {
              id: object::new(ctx),
              text: string::utf8(b"hello fucker!")
          };
  
          // 将 对象转给调用者
          transfer::public_transfer(object, tx_context::sender(ctx));
      }
  
  }

• 编译move代码: sui move build

• 发布package: sui client publish --gas-budget 20000000 ./

  • 可以看到输出之后的package ID
    

• export PACKAGE_ID=xxx

• 调用package : sui client call --function mint --module hello_world --package $PACKAGE_ID --gas-budget 10000000

  

• 区块浏览器查看交易： https://suiscan.xyz/devnet/tx/9aXrUYDWmHNZ5JoYwUjNBpqgyZUpXvh7xndV3nwrndFa

• 查看新建的 HelloWorldObject: https://suiscan.xyz/devnet/object/0x2001aa30f0aa00c6b6ef86201b5f83271c5a8f7fe6c87720ee939ebda5a4f9ce

  • 此 Object的owner是我的地址
  • Object中的字段值 hello fucker