update anchor basics examples

Author: ZYJLiu

basics/account-data/anchor/Anchor.toml

@@ -1,13 +1,15 @@
 [features]
 seeds = false
+skip-lint = false
+
 [programs.localnet]
-anchor_program_example = "FFKtnYFyzPj1qFjE9epkrfYHJwZMdh8CvJrB6XsKeFVz"
+anchor_program_example = "GpVcgWdgVErgLqsn8VYUch6EqDerMgNqoLSmGyKrd6MR"
 
 [registry]
-url = "https://anchor.projectserum.com"
+url = "https://api.apr.dev"
 
 [provider]
-cluster = "localnet"
+cluster = "Localnet"
 wallet = "~/.config/solana/id.json"
 
 [scripts]

basics/account-data/anchor/programs/anchor-program-example/src/instructions/create.rs

@@ -1,44 +1,32 @@
+use crate::state::AddressInfo;
 use anchor_lang::prelude::*;
-use anchor_lang::system_program;
 
-use crate::state::AddressInfo;
+#[derive(Accounts)]
+pub struct CreateAddressInfo<'info> {
+    #[account(mut)]
+    payer: Signer<'info>,
+
+    #[account(
+        init,
+        payer = payer,
+        space = 8 + AddressInfo::INIT_SPACE,
+    )]
+    address_info: Account<'info, AddressInfo>,
+    system_program: Program<'info, System>,
+}
 
-#[allow(clippy::result_large_err)]
 pub fn create_address_info(
     ctx: Context<CreateAddressInfo>,
     name: String,
     house_number: u8,
     street: String,
     city: String,
 ) -> Result<()> {
-    let address_info = AddressInfo::new(name, house_number, street, city);
-
-    let account_span = (address_info.try_to_vec()?).len();
-    let lamports_required = (Rent::get()?).minimum_balance(account_span);
-
-    system_program::create_account(
-        CpiContext::new(
-            ctx.accounts.system_program.to_account_info(),
-            system_program::CreateAccount {
-                from: ctx.accounts.payer.to_account_info(),
-                to: ctx.accounts.address_info.to_account_info(),
-            },
-        ),
-        lamports_required,
-        account_span as u64,
-        &ctx.accounts.system_program.key(),
-    )?;
-
-    let address_info_account = &mut ctx.accounts.address_info;
-    address_info_account.set_inner(address_info);
+    *ctx.accounts.address_info = AddressInfo {
+        name,
+        house_number,
+        street,
+        city,
+    };
     Ok(())
 }
-
-#[derive(Accounts)]
-pub struct CreateAddressInfo<'info> {
-    #[account(mut)]
-    address_info: Account<'info, AddressInfo>,
-    #[account(mut)]
-    payer: Signer<'info>,
-    system_program: Program<'info, System>,
-}

basics/account-data/anchor/programs/anchor-program-example/src/instructions/mod.rs

@@ -1,3 +1,2 @@
 pub mod create;
-
 pub use create::*;

basics/account-data/anchor/programs/anchor-program-example/src/lib.rs

@@ -1,26 +1,23 @@
 #![allow(clippy::result_large_err)]
-
 use anchor_lang::prelude::*;
-
 use instructions::*;
 
 pub mod instructions;
 pub mod state;
 
-declare_id!("FFKtnYFyzPj1qFjE9epkrfYHJwZMdh8CvJrB6XsKeFVz");
+declare_id!("GpVcgWdgVErgLqsn8VYUch6EqDerMgNqoLSmGyKrd6MR");
 
 #[program]
 pub mod anchor_program_example {
     use super::*;
 
-    #[allow(clippy::result_large_err)]
     pub fn create_address_info(
         ctx: Context<CreateAddressInfo>,
         name: String,
         house_number: u8,
         street: String,
         city: String,
     ) -> Result<()> {
-        instructions::create::create_address_info(ctx, name, house_number, street, city)
+        create::create_address_info(ctx, name, house_number, street, city)
     }
 }

basics/account-data/anchor/programs/anchor-program-example/src/state/address_info.rs

@@ -1,20 +1,13 @@
 use anchor_lang::prelude::*;
 
 #[account]
+#[derive(InitSpace)] // automatically calculate the space required for the struct
 pub struct AddressInfo {
-    pub name: String,
-    pub house_number: u8,
-    pub street: String,
-    pub city: String,
-}
-
-impl AddressInfo {
-    pub fn new(name: String, house_number: u8, street: String, city: String) -> Self {
-        AddressInfo {
-            name,
-            house_number,
-            street,
-            city,
-        }
-    }
+    #[max_len(50)] // set a max length for the string
+    pub name: String, // 4 bytes + 50 bytes
+    pub house_number: u8, // 1 byte
+    #[max_len(50)]
+    pub street: String, // 4 bytes + 50 bytes
+    #[max_len(50)]
+    pub city: String, // 4 bytes + 50 bytes
 }

basics/account-data/anchor/tests/test.ts

@@ -1,36 +1,52 @@
-import * as anchor from "@coral-xyz/anchor";
-import { AnchorProgramExample } from "../target/types/anchor_program_example";
+import * as anchor from "@coral-xyz/anchor"
+import { AnchorProgramExample } from "../target/types/anchor_program_example"
+import { Keypair, SystemProgram } from "@solana/web3.js"
 
 describe("Account Data!", () => {
-  const provider = anchor.AnchorProvider.env();
-  anchor.setProvider(provider);
-  const payer = provider.wallet as anchor.Wallet;
+  const provider = anchor.AnchorProvider.env()
+  anchor.setProvider(provider)
+  const payer = provider.wallet as anchor.Wallet
   const program = anchor.workspace
-    .AnchorProgramExample as anchor.Program<AnchorProgramExample>;
+    .AnchorProgramExample as anchor.Program<AnchorProgramExample>
 
-  const addressInfoAccount = anchor.web3.Keypair.generate();
+  // Generate a new keypair for the addressInfo account
+  const addressInfoAccount = new Keypair()
 
   it("Create the address info account", async () => {
-    console.log(`Payer Address      : ${payer.publicKey}`);
-    console.log(`Address Info Acct  : ${addressInfoAccount.publicKey}`);
+    console.log(`Payer Address      : ${payer.publicKey}`)
+    console.log(`Address Info Acct  : ${addressInfoAccount.publicKey}`)
+
+    // Instruction data
+    const addressInfo = {
+      name: "Joe C",
+      houseNumber: 136,
+      street: "Mile High Dr.",
+      city: "Solana Beach",
+    }
+
     await program.methods
-      .createAddressInfo("Joe C", 136, "Mile High Dr.", "Solana Beach")
+      .createAddressInfo(
+        addressInfo.name,
+        addressInfo.houseNumber,
+        addressInfo.street,
+        addressInfo.city
+      )
       .accounts({
         addressInfo: addressInfoAccount.publicKey,
         payer: payer.publicKey,
-        systemProgram: anchor.web3.SystemProgram.programId,
+        systemProgram: SystemProgram.programId,
       })
-      .signers([payer.payer])
-      .rpc();
-  });
+      .signers([addressInfoAccount])
+      .rpc()
+  })
 
   it("Read the new account's data", async () => {
     const addressInfo = await program.account.addressInfo.fetch(
       addressInfoAccount.publicKey
-    );
-    console.log(`Name     : ${addressInfo.name}`);
-    console.log(`House Num: ${addressInfo.houseNumber}`);
-    console.log(`Street   : ${addressInfo.street}`);
-    console.log(`City     : ${addressInfo.city}`);
-  });
-});
+    )
+    console.log(`Name     : ${addressInfo.name}`)
+    console.log(`House Num: ${addressInfo.houseNumber}`)
+    console.log(`Street   : ${addressInfo.street}`)
+    console.log(`City     : ${addressInfo.city}`)
+  })
+})

basics/close-account/anchor/Anchor.toml

@@ -1,14 +1,15 @@
 [features]
 seeds = false
 skip-lint = false
+
 [programs.localnet]
-close_account_program = "9SWqhEABWnKXTPvSLc4aQAJyESVxtRvYBvwF2WuBy7jf"
+close_account_program = "99TQtoDdQ5NS2v5Ppha93aqEmv3vV9VZVfHTP5rGST3c"
 
 [registry]
 url = "https://api.apr.dev"
 
 [provider]
-cluster = "localnet"
+cluster = "Localnet"
 wallet = "~/.config/solana/id.json"
 
 [scripts]

basics/close-account/anchor/programs/close-account/src/instructions/close_user.rs

@@ -1,29 +1,23 @@
-use anchor_lang::prelude::*;
-use anchor_lang::AccountsClose;
-
 use crate::state::*;
+use anchor_lang::prelude::*;
 
 #[derive(Accounts)]
 pub struct CloseUserContext<'info> {
+    #[account(mut)]
+    pub user: Signer<'info>,
+
     #[account(
         mut,
         seeds = [
-            User::PREFIX.as_bytes(),
+            b"USER",
             user.key().as_ref(),
         ],
-        has_one = user,
-        bump = user_account.bump
+        bump = user_account.bump,
+        close = user, // close account and return lamports to user
     )]
-    pub user_account: Account<'info, User>,
-    #[account(mut)]
-    pub user: Signer<'info>,
-    pub system_program: Program<'info, System>,
-    pub rent: Sysvar<'info, Rent>,
+    pub user_account: Account<'info, UserState>,
 }
 
-pub fn close_user(ctx: Context<CloseUserContext>) -> Result<()> {
-    let user = &mut ctx.accounts.user;
-    let user_account = &mut ctx.accounts.user_account;
-    user_account.close(user.to_account_info())?;
+pub fn close_user(_ctx: Context<CloseUserContext>) -> Result<()> {
     Ok(())
 }

basics/close-account/anchor/programs/close-account/src/instructions/create_user.rs

@@ -1,41 +1,31 @@
-use anchor_lang::prelude::*;
-
 use crate::state::*;
-
-#[derive(AnchorSerialize, AnchorDeserialize)]
-pub struct CreateUserArgs {
-    pub name: String,
-}
+use anchor_lang::prelude::*;
 
 #[derive(Accounts)]
-#[instruction(args: CreateUserArgs)]
 pub struct CreateUserContext<'info> {
+    #[account(mut)]
+    pub user: Signer<'info>,
+
     #[account(
         init,
-        space = User::SIZE,
-        payer = payer,
+        payer = user,
+        space = UserState::INIT_SPACE,
         seeds = [
-            User::PREFIX.as_bytes(),
-            payer.key().as_ref(),
+            b"USER",
+            user.key().as_ref(),
         ],
         bump
     )]
-    pub user_account: Account<'info, User>,
-    #[account(mut)]
-    pub payer: Signer<'info>,
+    pub user_account: Account<'info, UserState>,
     pub system_program: Program<'info, System>,
-    pub rent: Sysvar<'info, Rent>,
 }
 
-pub fn create_user(ctx: Context<CreateUserContext>, args: CreateUserArgs) -> Result<()> {
-    let payer = &ctx.accounts.payer;
+pub fn create_user(ctx: Context<CreateUserContext>, name: String) -> Result<()> {
     let user_account = &mut ctx.accounts.user_account;
 
-    msg!("{:#?}", ctx.bumps);
-
-    user_account.bump = *ctx.bumps.get("user_account").expect("Bump not found.");
-    user_account.user = payer.key();
-    user_account.name = args.name;
+    user_account.bump = *ctx.bumps.get("user_account").unwrap();
+    user_account.user = ctx.accounts.user.key();
+    user_account.name = name;
 
     Ok(())
 }

basics/close-account/anchor/programs/close-account/src/lib.rs

@@ -1,19 +1,18 @@
 #![allow(clippy::result_large_err)]
 
 use anchor_lang::prelude::*;
-
 mod instructions;
 mod state;
 use instructions::*;
 
-declare_id!("9SWqhEABWnKXTPvSLc4aQAJyESVxtRvYBvwF2WuBy7jf");
+declare_id!("99TQtoDdQ5NS2v5Ppha93aqEmv3vV9VZVfHTP5rGST3c");
 
 #[program]
 pub mod close_account_program {
     use super::*;
 
-    pub fn create_user(ctx: Context<CreateUserContext>, args: CreateUserArgs) -> Result<()> {
-        create_user::create_user(ctx, args)
+    pub fn create_user(ctx: Context<CreateUserContext>, name: String) -> Result<()> {
+        create_user::create_user(ctx, name)
     }
 
     pub fn close_user(ctx: Context<CloseUserContext>) -> Result<()> {