عنوان مشتق من البرنامج

use anchor_lang::prelude::*;

declare_id!("8KPzbM2Cwn4Yjak7QYAEH9wyoQh86NcBicaLuzPaejdw");

#[program]
pub mod pda {
    use super::*;

    pub fn create(_ctx: Context<Create>) -> Result<()> {
        Ok(())
    }

    pub fn update(_ctx: Context<Update>) -> Result<()> {
        Ok(())
    }

    pub fn delete(_ctx: Context<Delete>) -> Result<()> {
        Ok(())
    }
}

#[derive(Accounts)]
pub struct Create {}

#[derive(Accounts)]
pub struct Update {}

#[derive(Accounts)]
pub struct Delete {}

#[account]
pub struct MessageAccount {}

#[account]
pub struct MessageAccount {
    pub user: Pubkey,
    pub message: String,
    pub bump: u8,
}

#[derive(Accounts)]
#[instruction(message: String)]
pub struct Create<'info> {
    #[account(mut)]
    pub user: Signer<'info>,

    #[account(
        init,
        seeds = [b"message", user.key().as_ref()],
        bump,
        payer = user,
        space = 8 + 32 + 4 + message.len() + 1
    )]
    pub message_account: Account<'info, MessageAccount>,
    pub system_program: Program<'info, System>,
}

pub fn create(ctx: Context<Create>, message: String) -> Result<()> {
    msg!("Create Message: {}", message);
    let account_data = &mut ctx.accounts.message_account;
    account_data.user = ctx.accounts.user.key();
    account_data.message = message;
    account_data.bump = ctx.bumps.message_account;
    Ok(())
}

#[derive(Accounts)]
#[instruction(message: String)]
pub struct Update<'info> {
    #[account(mut)]
    pub user: Signer<'info>,

    #[account(
        mut,
        seeds = [b"message", user.key().as_ref()],
        bump = message_account.bump,
        realloc = 8 + 32 + 4 + message.len() + 1,
        realloc::payer = user,
        realloc::zero = true,
    )]
    pub message_account: Account<'info, MessageAccount>,
    pub system_program: Program<'info, System>,
}

pub fn update(ctx: Context<Update>, message: String) -> Result<()> {
    msg!("Update Message: {}", message);
    let account_data = &mut ctx.accounts.message_account;
    account_data.message = message;
    Ok(())
}

#[derive(Accounts)]
pub struct Delete<'info> {
    #[account(mut)]
    pub user: Signer<'info>,

    #[account(
        mut,
        seeds = [b"message", user.key().as_ref()],
        bump = message_account.bump,
        close = user,
    )]
    pub message_account: Account<'info, MessageAccount>,
}

pub fn delete(_ctx: Context<Delete>) -> Result<()> {
    msg!("Delete Message");
    Ok(())
}

import { PublicKey } from "@solana/web3.js";

describe("pda", () => {
  it("Create Message Account", async () => {});

  it("Update Message Account", async () => {});

  it("Delete Message Account", async () => {});
});

const program = pg.program;
const wallet = pg.wallet;

const [messagePda, messageBump] = PublicKey.findProgramAddressSync(
  [Buffer.from("message"), wallet.publicKey.toBuffer()],
  program.programId
);

it("Create Message Account", async () => {
  const message = "Hello, World!";
  const transactionSignature = await program.methods
    .create(message)
    .accounts({
      messageAccount: messagePda
    })
    .rpc({ commitment: "confirmed" });

  const messageAccount = await program.account.messageAccount.fetch(
    messagePda,
    "confirmed"
  );

  console.log(JSON.stringify(messageAccount, null, 2));
  console.log(
    "Transaction Signature:",
    `https://solana.fm/tx/${transactionSignature}?cluster=devnet-solana`
  );
});

it("Update Message Account", async () => {
  const message = "Hello, Solana!";
  const transactionSignature = await program.methods
    .update(message)
    .accounts({
      messageAccount: messagePda
    })
    .rpc({ commitment: "confirmed" });

  const messageAccount = await program.account.messageAccount.fetch(
    messagePda,
    "confirmed"
  );

  console.log(JSON.stringify(messageAccount, null, 2));
  console.log(
    "Transaction Signature:",
    `https://solana.fm/tx/${transactionSignature}?cluster=devnet-solana`
  );
});

it("Delete Message Account", async () => {
  const transactionSignature = await program.methods
    .delete()
    .accounts({
      messageAccount: messagePda
    })
    .rpc({ commitment: "confirmed" });

  const messageAccount = await program.account.messageAccount.fetchNullable(
    messagePda,
    "confirmed"
  );

  console.log("Expect Null:", JSON.stringify(messageAccount, null, 2));
  console.log(
    "Transaction Signature:",
    `https://solana.fm/tx/${transactionSignature}?cluster=devnet-solana`
  );
});