SPL Token y Token-2022

u32   mint_authority_option
Pubkey mint_authority
u64   supply
u8    decimals
bool  is_initialized
u32   freeze_authority_option
Pubkey freeze_authority

Pubkey mint
Pubkey owner
u64    amount
u32    delegate_option
Pubkey delegate
u8     state         // initialized, frozen
u32    is_native_option
u64    is_native
u64    delegated_amount
u32    close_authority_option
Pubkey close_authority

let extension = TransferFeeConfig {
    transfer_fee_config_authority,
    withdraw_withheld_authority,
    withheld_amount: 0,
    older_transfer_fee: ...,
    newer_transfer_fee: ...,
};

import { getAssociatedTokenAddressSync } from "@solana/spl-token";

// SPL Token
const ata = getAssociatedTokenAddressSync(mint, owner);

// Token-2022
const ata22 = getAssociatedTokenAddressSync(
  mint,
  owner,
  false,               // allowOwnerOffCurve
  TOKEN_2022_PROGRAM_ID,
);

const mintInfo = await connection.getAccountInfo(mintPubkey);
if (mintInfo.owner.equals(TOKEN_PROGRAM_ID)) {
  console.log("SPL Token mint");
} else if (mintInfo.owner.equals(TOKEN_2022_PROGRAM_ID)) {
  console.log("Token-2022 mint");
}

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

const connection = new Connection("https://api.mainnet-beta.solana.com");
const payer      = Keypair.generate();
const mint       = Keypair.generate();

const extensions    = [ExtensionType.TransferFeeConfig];
const mintLen       = getMintLen(extensions);
const rentLamports  = await connection.getMinimumBalanceForRentExemption(mintLen);

const tx = new Transaction().add(
  SystemProgram.createAccount({
    fromPubkey:       payer.publicKey,
    newAccountPubkey: mint.publicKey,
    space:            mintLen,
    lamports:         rentLamports,
    programId:        TOKEN_2022_PROGRAM_ID,
  }),
  createInitializeTransferFeeConfigInstruction(
    mint.publicKey,
    payer.publicKey,                  // transfer fee authority
    payer.publicKey,                  // withdraw-withheld authority
    50,                               // 50 bps = 0.5%
    BigInt(1_000_000),                // max fee per transfer (smallest units)
    TOKEN_2022_PROGRAM_ID,
  ),
  createInitializeMintInstruction(
    mint.publicKey,
    9,                                // decimals
    payer.publicKey,                  // mint authority
    null,                             // freeze authority
    TOKEN_2022_PROGRAM_ID,
  ),
);

await sendAndConfirmTransaction(connection, tx, [payer, mint]);