Solana Token Transfer (TypeScript)

import {
  Connection,
  PublicKey,
  Keypair,
  sendAndConfirmTransaction,
} from "@solana/web3.js";
import {
  getOrCreateAssociatedTokenAccount,
  createTransferInstruction,
} from "@solana/spl-token";

async function transferToken(
  connection: Connection,
  payer: Keypair,
  mint: PublicKey,
  dest: PublicKey,
  amount: number
) {
  const sourceAta = await getOrCreateAssociatedTokenAccount(
    connection, payer, mint, payer.publicKey
  );
  const destAta = await getOrCreateAssociatedTokenAccount(
    connection, payer, mint, dest
  );

  const ix = createTransferInstruction(
    sourceAta.address,
    destAta.address,
    payer.publicKey,
    amount
  );

  const tx = await sendAndConfirmTransaction(connection, tx, [payer]);
  return tx;
}