不可變擁有者擴展

Name: 使用Web3.js的Token2022
Availability: InStock

ImmutableOwner 擴展是一個 Token 賬戶擴展，該擴展可防止 Token 賬戶的所有權發生任何變更。這可以保護賬戶免受未經授權的訪問和轉移嘗試。

所有 Token 擴展程序的 ATA 默認啟用了不可變擁有者功能

初始化代幣賬戶

要在 Token 賬戶上初始化 ImmutableOwner 擴展，我們需要使用 initializeImmutableOwner() 函數。

以下是如何使用不可變擁有者擴展創建代幣的方法：

import { Keypair, SystemProgram, Transaction, sendAndConfirmTransaction } from "@solana/web3.js";
import {
  createInitializeAccountInstruction,
  createInitializeImmutableOwnerInstruction,
  getAccountLen,
  ExtensionType,
  TOKEN_2022_PROGRAM_ID,
} from "@solana/spl-token";

const tokenAccount = Keypair.generate();

// Calculate the size needed for a Token account with Immutable Owner extension
const accountLen = getAccountLen([ExtensionType.ImmutableOwner]);

// Calculate minimum lamports required for rent exemption
const lamports = await connection.getMinimumBalanceForRentExemption(accountLen);

// Create the account with the correct size and owner
const createAccountInstruction = SystemProgram.createAccount({
  fromPubkey: keypair.publicKey,
  newAccountPubkey: tokenAccount.publicKey,
  space: accountLen,
  lamports,
  programId: TOKEN_2022_PROGRAM_ID,
});

// Initialize the Immutable Owner extension
const initializeImmutableOwnerInstruction = createInitializeImmutableOwnerInstruction(
  tokenAccount.publicKey,
  TOKEN_2022_PROGRAM_ID,
);

// Initialize the Token account itself
const initializeAccountInstruction = createInitializeAccountInstruction(
  tokenAccount.publicKey,
  mint.publicKey,
  keypair.publicKey,
  TOKEN_2022_PROGRAM_ID,
);

const transaction = new Transaction().add(
  createAccountInstruction,
  initializeImmutableOwnerInstruction,
  initializeAccountInstruction,
);

const signature = await sendAndConfirmTransaction(
  connection,
  transaction,
  [keypair, tokenAccount],
  { skipPreflight: false },
);

console.log(
  `Token accounts created! Check out your TX here: https://explorer.solana.com/tx/${signature}?cluster=devnet`,
);

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如前所述，如果我們想將此擴展添加到 Associated Token 賬戶，我們只需使用 Token2022 程序進行初始化即可。