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();

// Calcula o tamanho necessário para uma conta Mint com a extensão Non Transferable
const mintLen = getMintLen([ExtensionType.NonTransferable]);

// Calcula lamports mínimos necessários para isenção de rent
const lamports = await connection.getMinimumBalanceForRentExemption(mintLen);

// Cria a conta com o tamanho e owner corretos
const createAccountInstruction = SystemProgram.createAccount({
  fromPubkey: keypair.publicKey,
  newAccountPubkey: mint.publicKey,
  space: mintLen,
  lamports,
  programId: TOKEN_2022_PROGRAM_ID,
});

// Inicializa a extensão Non Transferable
const initializeMintNonTransferable = createInitializeNonTransferableMintInstruction(
  mint.publicKey,
  TOKEN_2022_PROGRAM_ID,
);

// Inicializa a própria mint
const initializeMintInstruction = createInitializeMintInstruction(
  mint.publicKey,
  6,
  keypair.publicKey,
  null,
  TOKEN_2022_PROGRAM_ID,
);

// Combina todas as instruções na ordem correta
const transaction = new Transaction().add(
  createAccountInstruction,
  initializeMintNonTransferable,
  initializeMintInstruction,
);

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

console.log(
  `Mint criada! Confira sua TX aqui: https://explorer.solana.com/tx/${signature}?cluster=devnet`,
);