Close aux token account

closeAuxAccount.ts

import * as anchor from "@coral-xyz/anchor";
import { PublicKey, Transaction, ComputeBudgetProgram } from "@solana/web3.js";
import * as token from "@solana/spl-token";

const provider = anchor.AnchorProvider.env();
anchor.setProvider(provider);

// Assumes your running with `anchor run closeAux --provider.cluster mainnet --provider.wallet ~/.config/solana/your-key.json`
const payer = provider.wallet["payer"];

// Function to transfer all tokens and close the source token account
async function transferAllTokensAndClose(
  sourceAccountPublicKey,
  tokenMintPublicKey
) {
  const sourceAccountInfo = await token.getAccount(
    provider.connection,
    sourceAccountPublicKey
  );
  const amount = sourceAccountInfo.amount;

  const destinationAccount = await token.getOrCreateAssociatedTokenAccount(
    provider.connection,
    payer,
    tokenMintPublicKey,
    payer.publicKey
  );

  const transferIx = token.createTransferInstruction(
    sourceAccountPublicKey,
    destinationAccount.address,
    payer.publicKey,
    amount
  );

  const closeAccountIx = token.createCloseAccountInstruction(
    sourceAccountPublicKey,
    payer.publicKey,
    payer.publicKey
  );

  const transaction = new Transaction();
  // Set compute unit budget and priority fee
  transaction.add(ComputeBudgetProgram.setComputeUnitLimit({ units: 30000 }));
  transaction.add(
    ComputeBudgetProgram.setComputeUnitPrice({ microLamports: 1000 })
  );

  transaction.add(transferIx);
  transaction.add(closeAccountIx);

  transaction.feePayer = payer.publicKey;
  transaction.recentBlockhash = (
    await provider.connection.getLatestBlockhash()
  ).blockhash;

  console.log("Sending transfer and close account transaction...");
  const result = await provider.sendAndConfirm(transaction, [payer]);
  return result;
}

async function main() {
  // Use `spl-token accounts -v` to get the aux account public key
  const auxAccountPublicKey = new PublicKey(
    "[your aux account pubkey here]"
  );
  const tokenMintPublicKey = new PublicKey(
    "[the token mint pubkey here]"
  );

  // Transfer all tokens and close the aux account
  await transferAllTokensAndClose(auxAccountPublicKey, tokenMintPublicKey);

  console.log("All tokens transferred and aux account closed successfully.");
}

main();

Instructions for use

• Get your private key from the web wallet
• Use base58 python package or some other approach to convert the private key to the array of integer format required by the solana CLI https://solana.stackexchange.com/a/2739/255
• Save the private key in array format to a .json file, set that keypair as the default in the solana cli config
• Install and call spl-token accounts -v to get the aux account pubkey and the mint pubkey
• Create an anchor environment
• Create a scripts folder and add the above file to it
• Add closeAux = "yarn run ts-node scripts/closeAuxAccount.ts" to the Anchor.toml file
• Run the script using anchor run closeAux --provider.cluster mainnet --provider.wallet ~/.config/solana/your-key.json