How to Burn Tokens

import { Connection, Keypair } from "@solana/web3.js";
import {
  createMint,
  getOrCreateAssociatedTokenAccount,
  mintTo,
  burnChecked
} from "@solana/spl-token";

(async () => {
  // Connect to local Solana node
  const connection = new Connection("http://127.0.0.1:8899", "confirmed");

  // Create a fee payer account
  const feePayer = Keypair.generate();

  // Request airdrop for fee payer
  const airdropSig = await connection.requestAirdrop(
    feePayer.publicKey,
    1000000000
  );
  await connection.confirmTransaction(airdropSig);

  // Step 1: Create a new mint
  const mintAuthority = feePayer;
  const freezeAuthority = feePayer;
  const decimals = 2;

  console.log("Creating mint...");
  const mint = await createMint(
    connection,
    feePayer,
    mintAuthority.publicKey,
    freezeAuthority.publicKey,
    decimals
  );
  console.log("Mint created:", mint.toBase58());

  // Step 2: Create Associated Token Account
  console.log("Creating token account...");
  const tokenAccount = await getOrCreateAssociatedTokenAccount(
    connection,
    feePayer,
    mint,
    feePayer.publicKey
  );
  console.log("Token account:", tokenAccount.address.toBase58());

  // Step 3: Mint tokens
  const amountToMint = 100;
  console.log("Minting tokens...");
  const mintTx = await mintTo(
    connection,
    feePayer,
    mint,
    tokenAccount.address,
    mintAuthority,
    amountToMint
  );
  console.log("Mint transaction:", mintTx);

  // Step 4: Burn tokens
  const amountToBurn = 50;
  console.log("Burning tokens...");
  const burnTx = await burnChecked(
    connection,
    feePayer,
    tokenAccount.address,
    mint,
    feePayer,
    amountToBurn,
    decimals
  );
  console.log("Burn transaction:", burnTx);
})();