在 Solana Anchor 框架内初始化 PDA 的正确方法

Question

我正在尝试使用 Rust/Anchor 编写一个简单的 Solana 程序，该程序使用 PDA，但当我尝试调用它时，我收到 CPI 错误，即使没有发生 CPI（可能是 PDA 帐户初始化？）。

这是程序代码：

use anchor_lang::prelude::*;

declare_id!("51v31qHaEQniLoYuvvtXByZcfiyvog3R2EKC39EPD52p");

#[program]
pub mod solana_sandbox {
  use super::*;
  pub fn initialize(ctx: Context<Initialize>, bump: u8) -> ProgramResult {
    ctx.accounts.sandbox_account.bump = bump;
    Ok(())
  }
}

#[derive(Accounts)]
#[instruction(bump: u8)]
pub struct Initialize<'info> {
  #[account(mut)]
  pub signer: Signer<'info>,
  #[account(
    init,
    seeds = [b"seed".as_ref()],
    bump,
    payer = signer,
  )]
  pub sandbox_account: Account<'info, SandboxAccount>,
  pub system_program: Program<'info, System>,
}

#[account]
#[derive(Default)]
pub struct SandboxAccount {
  pub bump: u8,
}

这是客户端代码：

  const [sandboxPda, sandboxBump] = await PublicKey.findProgramAddress([Buffer.from('seed')], SystemProgram.programId);

  await program.rpc.initialize(
    sandboxBump,
    {
      accounts: {
        signer: keypair.publicKey,
        sandboxAccount: sandboxPda,
        systemProgram: anchor.web3.SystemProgram.programId,
      },
      signers: [keypair],
      instructions: []
    });

当我运行上面的代码时，我得到以下信息：

Transaction simulation failed: Error processing Instruction 0: Cross-program invocation with unauthorized signer or writable account 
    Program 51v31qHaEQniLoYuvvtXByZcfiyvog3R2EKC39EPD52p invoke [1]
    8ZiyjNgnFFPyw39NyMQE5FGETTjyUhSHUVQG3oKAFZiU's signer privilege escalated
    Program 51v31qHaEQniLoYuvvtXByZcfiyvog3R2EKC39EPD52p consumed 200000 of 200000 compute units
    Program 51v31qHaEQniLoYuvvtXByZcfiyvog3R2EKC39EPD52p failed: Cross-program invocation with unauthorized signer or writable account

8ZiyjNgnFFPyw39NyMQE5FGETTjyUhSHUVQG3oKAFZiU是我传入的 PDA 地址，我正在使用anchor-cli 0.18.0.

Answer 1

结果我在客户端代码中使用系统程序 ID 来派生 PDA，而不是使用我的实际程序 ID。

应该：

  const [sandboxPda, sandboxBump] = await PublicKey.findProgramAddress([Buffer.from('seed')], <PROGRAM_ID>);