不可轉讓擴展

Name: 使用Web3.js的Token2022
Availability: InStock

NonTransferable 擴展是一個 Mint 賬戶擴展，該擴展防止代幣在賬戶之間轉移，使其永久綁定於當前持有人。

初始化鑄幣賬戶

要在 Mint 賬戶上初始化 MintCloseAuthority 擴展，我們需要使用 initializeNonTransferableMint() 函數。

以下是如何使用不可轉讓擴展創建鑄幣的方法：

import { Keypair, SystemProgram, Transaction, sendAndConfirmTransaction } from "@solana/web3.js";
import {
  createInitializeMintInstruction,
  createInitializeNonTransferableMintInstruction,
  getMintLen,
  ExtensionType,
  TOKEN_2022_PROGRAM_ID,
} from "@solana/spl-token";

const mint = Keypair.generate();

// Calculate the size needed for a Mint account with Non Transferable extension
const mintLen = getMintLen([ExtensionType.NonTransferable]);

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

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

// Initialize the Non Transferable extension
const initializeMintNonTransferable = createInitializeNonTransferableMintInstruction(
  mint.publicKey,
  TOKEN_2022_PROGRAM_ID,
);

// Initialize the mint itself
const initializeMintInstruction = createInitializeMintInstruction(
  mint.publicKey,
  6,
  keypair.publicKey,
  null,
  TOKEN_2022_PROGRAM_ID,
);

// Combine all instructions in the correct order
const transaction = new Transaction().add(
  createAccountInstruction,
  initializeMintNonTransferable,
  initializeMintInstruction,
);

const signature = await sendAndConfirmTransaction(connection, transaction, [keypair, mint]);

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

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