solana-program-examples/tokens/token-2022/mint-close-authority/anchor/tests/mint-close-authority.ts

import * as anchor from '@coral-xyz/anchor';
import type { Program } from '@coral-xyz/anchor';
import { TOKEN_2022_PROGRAM_ID, closeAccount } from '@solana/spl-token';
import type { MintCloseAuthority } from '../target/types/mint_close_authority';

describe('mint-close-authority', () => {
  // Configure the client to use the local cluster.
  const provider = anchor.AnchorProvider.env();
  const connection = provider.connection;
  const wallet = provider.wallet as anchor.Wallet;
  anchor.setProvider(provider);

  const program = anchor.workspace.MintCloseAuthority as Program<MintCloseAuthority>;

  const mintKeypair = new anchor.web3.Keypair();

  it('Create Mint with Close Authority', async () => {
    const transactionSignature = await program.methods
      .initialize()
      .accounts({ mintAccount: mintKeypair.publicKey })
      .signers([mintKeypair])
      .rpc({ skipPreflight: true });
    console.log('Your transaction signature', transactionSignature);
  });

  it('Close Mint with Anchor CPI', async () => {
    const transactionSignature = await program.methods.close().accounts({ mintAccount: mintKeypair.publicKey }).rpc({ skipPreflight: true });
    console.log('Your transaction signature', transactionSignature);
  });

  it('Create Mint with Close Authority again', async () => {
    const transactionSignature = await program.methods
      .initialize()
      .accounts({ mintAccount: mintKeypair.publicKey })
      .signers([mintKeypair])
      .rpc({ skipPreflight: true });
    console.log('Your transaction signature', transactionSignature);
  });

  it('Close Mint using @solana/spl-token', async () => {
    const transactionSignature = await closeAccount(
      connection,
      wallet.payer, // Transaction fee payer
      mintKeypair.publicKey, // Mint Account address
      wallet.publicKey, // Account to receive lamports from closed account
      wallet.publicKey, // Close Authority for Mint Account
      undefined, // Additional signers
      undefined, // Confirmation options
      TOKEN_2022_PROGRAM_ID, // Token Extension Program ID
    );
    console.log('Your transaction signature', transactionSignature);
  });
});