nft add display; learn record;

mover/greyhao/co-learn-2411/readme.md

@@ -29,13 +29,15 @@
 - [x] 第二篇笔记
 - [x] 第三篇笔记
 - [x] 第四篇笔记
+- [x] 第五篇笔记
 
 ## 对外输出学习笔记
 
 - [x] 第一篇笔记 [学习笔记链接](https://learnblockchain.cn/article/9814)
 - [x] 第二篇笔记 [学习笔记链接](https://learnblockchain.cn/article/9839)
 - [x] 第三篇笔记 [学习笔记链接](https://learnblockchain.cn/article/9866)
 - [x] 第四篇笔记 [学习笔记链接](https://learnblockchain.cn/article/9876)
+- [x] 第五篇笔记 [学习笔记链接](https://learnblockchain.cn/article/9925)
 
 ## 在HOH社区公众号发布自己的技术文章
 

mover/greyhao/code/nft_greyhao/sources/nft_greyhao.move

@@ -4,14 +4,19 @@ module nft_greyhao::nft_greyhao;
 use std::string::{String , utf8};
 use sui::url::{Self, Url};
 use sui::event;
+use sui::package;
+use sui::display;
 
 public struct GreyhaoNFT has key, store {
   id: UID,
   name: String,
   description: String,
-  url: Url,
+  image_url: Url,
 }
 
+// OTW for module
+public struct NFT_GREYHAO has drop {}
+
 //  ====Evens ====
 public struct NFTMinted has copy, drop {
   object_id: ID,
@@ -32,15 +37,42 @@ public fun description(nft: &GreyhaoNFT): &String {
 }
 
 /// Get NFT's url
-public fun url(nft: &GreyhaoNFT): &Url {
-  &nft.url
+public fun image_url(nft: &GreyhaoNFT): &Url {
+  &nft.image_url
 }
 
 /// update the `description` of `nft` to `new_description`
 public fun update_description(nft: &mut GreyhaoNFT, new_description: vector<u8>, _: &mut TxContext) {
   nft.description = utf8(new_description)
 }
 
+fun init(otw: NFT_GREYHAO, ctx: &mut TxContext) {
+  // key包含的值就是 GreyhaoNFT 对象中除 id 外的字段
+  let keys = vector[
+    b"name".to_string(),
+    b"description".to_string(),
+    b"image_url".to_string(),
+  ];
+
+  let values = vector[
+    b"{name}".to_string(),
+    b"{description}".to_string(),
+    b"{image_url}".to_string(),
+  ];
+
+  let publisher = package::claim(otw, ctx);
+
+  let mut display = display::new_with_fields<GreyhaoNFT>(&publisher, keys, values, ctx);
+
+  display.update_version();
+
+  transfer::public_transfer(publisher, ctx.sender());
+  transfer::public_transfer(display, ctx.sender());
+
+  let nft = nftInfo(ctx);
+  transfer::transfer(nft, tx_context::sender(ctx));
+}
+
 #[allow(lint(self_transfer))]
 public fun mint(ctx: &mut TxContext){
   let recipient = tx_context::sender(ctx);
@@ -74,12 +106,12 @@ fun nftInfo(ctx: &mut TxContext): GreyhaoNFT {
     id: object::new(ctx),
     name: utf8(b"GREYHAO"),
     description: utf8(b"NFT was created by GreyHao."),
-    url: url,
+    image_url: url,
   }
 }
 
 /// delete `nft`
 public fun burn(nft: GreyhaoNFT, _: &mut TxContext) {
-  let GreyhaoNFT {id, name: _, description: _, url: _} = nft;
+  let GreyhaoNFT {id, name: _, description: _, image_url: _} = nft;
   id.delete()
 }