Đóng Mint

Cách kích hoạt tiện ích mở rộng MintCloseAuthority

Tiện ích mở rộng MintCloseAuthority cho phép đóng các mint account và lấy lại rent của chúng. Tiện ích mở rộng này phải được khởi tạo khi mint account được tạo.

Chỉ có người có quyền đóng được chỉ định mới có thể đóng mint account. Tương tự như cách các tài khoản token chỉ có thể được đóng khi số dư token bằng không, các mint account có tiện ích mở rộng này chỉ có thể được đóng khi toàn bộ lượng cung token đã giảm xuống còn không.

Typescript

import {
  airdropFactory,
  appendTransactionMessageInstructions,
  createSolanaRpc,
  createSolanaRpcSubscriptions,
  createTransactionMessage,
  generateKeyPairSigner,
  getSignatureFromTransaction,
  lamports,
  pipe,
  sendAndConfirmTransactionFactory,
  setTransactionMessageFeePayerSigner,
  setTransactionMessageLifetimeUsingBlockhash,
  signTransactionMessageWithSigners
} from "@solana/kit";
import { getCreateAccountInstruction } from "@solana-program/system";
import {
  getInitializeMintInstruction,
  getMintSize,
  TOKEN_2022_PROGRAM_ADDRESS,
  extension,
  getInitializeMintCloseAuthorityInstruction,
  getCloseAccountInstruction
} from "@solana-program/token-2022";

// Create Connection, local validator in this example
const rpc = createSolanaRpc("http://localhost:8899");
const rpcSubscriptions = createSolanaRpcSubscriptions("ws://localhost:8900");

// Generate the authority for the mint, (will also act as the fee payer)
// and destination to receive recovered SOL after closing the mint
const authority = await generateKeyPairSigner();
const destination = await generateKeyPairSigner();

// Fund authority/fee payer
await airdropFactory({ rpc, rpcSubscriptions })({
  recipientAddress: authority.address,
  lamports: lamports(5_000_000_000n), // 5 SOL
  commitment: "confirmed"
});

// Generate keypair to use as address of mint
const mint = await generateKeyPairSigner();

// And a mint close authority extension.
const mintCloseAuthorityExtension = extension("MintCloseAuthority", {
  closeAuthority: authority.address
});

// Get default mint account size (in bytes), with the close mint extension
const space = BigInt(getMintSize([mintCloseAuthorityExtension]));

// Get minimum balance for rent exemption
const rent = await rpc.getMinimumBalanceForRentExemption(space).send();

// Get latest blockhash to include in transaction
const { value: latestBlockhash } = await rpc.getLatestBlockhash().send();

// Instruction to create new account for mint (token program)
// Invokes the system program
const createAccountInstruction = getCreateAccountInstruction({
  payer: authority,
  newAccount: mint,
  lamports: rent,
  space,
  programAddress: TOKEN_2022_PROGRAM_ADDRESS
});

// Instruction to initialize the close mint authority extension
const initializeCloseMintInstruction =
  getInitializeMintCloseAuthorityInstruction({
    mint: mint.address,
    closeAuthority: mintCloseAuthorityExtension.closeAuthority
  });

// Instruction to initialize mint account data
// Invokes the token program
const initializeMintInstruction = getInitializeMintInstruction({
  mint: mint.address,
  decimals: 9,
  mintAuthority: authority.address
});

const instructions = [
  createAccountInstruction,
  initializeCloseMintInstruction,
  initializeMintInstruction
];

// Create transaction message
const transactionMessage = pipe(
  createTransactionMessage({ version: 0 }),
  (tx) => setTransactionMessageFeePayerSigner(authority, tx),
  (tx) => setTransactionMessageLifetimeUsingBlockhash(latestBlockhash, tx),
  (tx) => appendTransactionMessageInstructions(instructions, tx)
);

// Sign transaction message with all required signers
const signedTransaction =
  await signTransactionMessageWithSigners(transactionMessage);

// Send and confirm transaction
await sendAndConfirmTransactionFactory({ rpc, rpcSubscriptions })(
  signedTransaction,
  { commitment: "confirmed", skipPreflight: true }
);

// // Get transaction signature
const transactionSignature = getSignatureFromTransaction(signedTransaction);

console.log("Mint Address:", mint.address.toString());
console.log("Transaction Signature:", transactionSignature);

// Get a fresh blockhash for the close mint extension instruction
const { value: latestBlockhash2 } = await rpc.getLatestBlockhash().send();

const closeMintInstruction = getCloseAccountInstruction({
  account: mint.address,
  destination: destination.address,
  owner: authority
});

// Create transaction message for close mint extension
const closeMintMessage = pipe(
  createTransactionMessage({ version: 0 }),
  (tx) => setTransactionMessageFeePayerSigner(authority, tx),
  (tx) => setTransactionMessageLifetimeUsingBlockhash(latestBlockhash2, tx),
  (tx) => appendTransactionMessageInstructions([closeMintInstruction], tx)
);

// Sign transaction message with all required signers
const signedCloseMintTx =
  await signTransactionMessageWithSigners(closeMintMessage);

// Send and confirm transaction
await sendAndConfirmTransactionFactory({ rpc, rpcSubscriptions })(
  signedCloseMintTx,
  { commitment: "confirmed" }
);

// Get transaction signature
const closeMintTxSig = getSignatureFromTransaction(signedCloseMintTx);

console.log("\nDestination Address:", destination.address.toString());
console.log("Transaction Signature:", closeMintTxSig);

Console

Click to execute the code.

import {
  airdropFactory,
  appendTransactionMessageInstructions,
  createSolanaRpc,
  createSolanaRpcSubscriptions,
  createTransactionMessage,
  generateKeyPairSigner,
  getSignatureFromTransaction,
  lamports,
  pipe,
  sendAndConfirmTransactionFactory,
  setTransactionMessageFeePayerSigner,
  setTransactionMessageLifetimeUsingBlockhash,
  signTransactionMessageWithSigners
} from "@solana/kit";
import { getCreateAccountInstruction } from "@solana-program/system";
import {
  getInitializeMintInstruction,
  getMintSize,
  TOKEN_2022_PROGRAM_ADDRESS,
  extension,
  getInitializeMintCloseAuthorityInstruction,
  getCloseAccountInstruction
} from "@solana-program/token-2022";

// Create Connection, local validator in this example
const rpc = createSolanaRpc("http://localhost:8899");
const rpcSubscriptions = createSolanaRpcSubscriptions("ws://localhost:8900");

// Generate the authority for the mint, (will also act as the fee payer)
// and destination to receive recovered SOL after closing the mint
const authority = await generateKeyPairSigner();
const destination = await generateKeyPairSigner();

// Fund authority/fee payer
await airdropFactory({ rpc, rpcSubscriptions })({
  recipientAddress: authority.address,
  lamports: lamports(5_000_000_000n), // 5 SOL
  commitment: "confirmed"
});

// Generate keypair to use as address of mint
const mint = await generateKeyPairSigner();

// And a mint close authority extension.
const mintCloseAuthorityExtension = extension("MintCloseAuthority", {
  closeAuthority: authority.address
});

// Get default mint account size (in bytes), with the close mint extension
const space = BigInt(getMintSize([mintCloseAuthorityExtension]));

// Get minimum balance for rent exemption
const rent = await rpc.getMinimumBalanceForRentExemption(space).send();

// Get latest blockhash to include in transaction
const { value: latestBlockhash } = await rpc.getLatestBlockhash().send();

// Instruction to create new account for mint (token program)
// Invokes the system program
const createAccountInstruction = getCreateAccountInstruction({
  payer: authority,
  newAccount: mint,
  lamports: rent,
  space,
  programAddress: TOKEN_2022_PROGRAM_ADDRESS
});

// Instruction to initialize the close mint authority extension
const initializeCloseMintInstruction =
  getInitializeMintCloseAuthorityInstruction({
    mint: mint.address,
    closeAuthority: mintCloseAuthorityExtension.closeAuthority
  });

// Instruction to initialize mint account data
// Invokes the token program
const initializeMintInstruction = getInitializeMintInstruction({
  mint: mint.address,
  decimals: 9,
  mintAuthority: authority.address
});

const instructions = [
  createAccountInstruction,
  initializeCloseMintInstruction,
  initializeMintInstruction
];

// Create transaction message
const transactionMessage = pipe(
  createTransactionMessage({ version: 0 }),
  (tx) => setTransactionMessageFeePayerSigner(authority, tx),
  (tx) => setTransactionMessageLifetimeUsingBlockhash(latestBlockhash, tx),
  (tx) => appendTransactionMessageInstructions(instructions, tx)
);

// Sign transaction message with all required signers
const signedTransaction =
  await signTransactionMessageWithSigners(transactionMessage);

// Send and confirm transaction
await sendAndConfirmTransactionFactory({ rpc, rpcSubscriptions })(
  signedTransaction,
  { commitment: "confirmed", skipPreflight: true }
);

// // Get transaction signature
const transactionSignature = getSignatureFromTransaction(signedTransaction);

console.log("Mint Address:", mint.address.toString());
console.log("Transaction Signature:", transactionSignature);

// Get a fresh blockhash for the close mint extension instruction
const { value: latestBlockhash2 } = await rpc.getLatestBlockhash().send();

const closeMintInstruction = getCloseAccountInstruction({
  account: mint.address,
  destination: destination.address,
  owner: authority
});

// Create transaction message for close mint extension
const closeMintMessage = pipe(
  createTransactionMessage({ version: 0 }),
  (tx) => setTransactionMessageFeePayerSigner(authority, tx),
  (tx) => setTransactionMessageLifetimeUsingBlockhash(latestBlockhash2, tx),
  (tx) => appendTransactionMessageInstructions([closeMintInstruction], tx)
);

// Sign transaction message with all required signers
const signedCloseMintTx =
  await signTransactionMessageWithSigners(closeMintMessage);

// Send and confirm transaction
await sendAndConfirmTransactionFactory({ rpc, rpcSubscriptions })(
  signedCloseMintTx,
  { commitment: "confirmed" }
);

// Get transaction signature
const closeMintTxSig = getSignatureFromTransaction(signedCloseMintTx);

console.log("\nDestination Address:", destination.address.toString());
console.log("Transaction Signature:", closeMintTxSig);

Console

Click to execute the code.

Rust

use anyhow::Result;
use solana_client::nonblocking::rpc_client::RpcClient;
use solana_commitment_config::CommitmentConfig;
use solana_sdk::{
    signature::{Keypair, Signer},
    transaction::Transaction,
};
use solana_system_interface::instruction::create_account;
use spl_token_2022_interface::{
    extension::{
        mint_close_authority::MintCloseAuthority, BaseStateWithExtensions, ExtensionType,
        StateWithExtensions,
    },
    instruction::{close_account, initialize_mint, initialize_mint_close_authority},
    state::Mint,
    ID as TOKEN_2022_PROGRAM_ID,
};

#[tokio::main]
async fn main() -> Result<()> {
    // Create connection to local validator
    let client = RpcClient::new_with_commitment(
        String::from("http://localhost:8899"),
        CommitmentConfig::confirmed(),
    );
    let latest_blockhash = client.get_latest_blockhash().await?;

    // Generate a new keypair for the fee payer
    let fee_payer = Keypair::new();

    // Generate a keypair for the destination
    let destination = Keypair::new();

    // Airdrop 5 SOL to fee payer
    let airdrop_signature = client
        .request_airdrop(&fee_payer.pubkey(), 5_000_000_000)
        .await?;

    loop {
        let confirmed = client.confirm_transaction(&airdrop_signature).await?;
        if confirmed {
            break;
        }
    }

    // Generate keypair to use as address of mint
    let mint = Keypair::new();

    // Get default mint account size (in bytes),
    let mint_space =
        ExtensionType::try_calculate_account_len::<Mint>(&[ExtensionType::MintCloseAuthority])?;

    // get the rent in lamports for the mint account
    let mint_rent = client
        .get_minimum_balance_for_rent_exemption(mint_space)
        .await?;

    // Instruction to create new account for mint
    let create_account_instruction = create_account(
        &fee_payer.pubkey(),    // payer
        &mint.pubkey(),         // new account (mint)
        mint_rent,              // lamports
        mint_space as u64,      // space
        &TOKEN_2022_PROGRAM_ID, // program id
    );

    let initialize_close_mint_instruction = initialize_mint_close_authority(
        &TOKEN_2022_PROGRAM_ID,    // token program
        &mint.pubkey(),            // mint
        Some(&fee_payer.pubkey()), // close authority
    )?;

    // Instruction to initialize mint account data
    let initialize_mint_instruction = initialize_mint(
        &TOKEN_2022_PROGRAM_ID,    // token program
        &mint.pubkey(),            // mint
        &fee_payer.pubkey(),       // mint authority
        Some(&fee_payer.pubkey()), // freeze authority
        9,                         // decimals
    )?;

    // Create transaction and add instructions
    let transaction = Transaction::new_signed_with_payer(
        &[
            create_account_instruction,
            initialize_close_mint_instruction,
            initialize_mint_instruction,
        ],
        Some(&fee_payer.pubkey()),
        &[&fee_payer, &mint],
        latest_blockhash,
    );

    // Send and confirm transaction
    client.send_and_confirm_transaction(&transaction).await?;

    println!("Mint Address: {}", mint.pubkey());

    // Fetch mint account
    let mint_account = client.get_account(&mint.pubkey()).await?;
    // Deserialize the mint account with extensions
    let mint_state = StateWithExtensions::<Mint>::unpack(&mint_account.data)?;

    // Get all extension types enabled on this mint
    let mint_extension_types = mint_state.get_extension_types()?;
    println!("\nMint extensions enabled: {:?}", mint_extension_types);

    // Deserialize the MintCloseAuthority extension data
    let mint_close_authority = mint_state.get_extension::<MintCloseAuthority>()?;
    println!("\n{:#?}", mint_close_authority);

    let close_mint_instruction = close_account(
        &TOKEN_2022_PROGRAM_ID, // token program
        &mint.pubkey(),         // mint
        &destination.pubkey(),  // destination
        &fee_payer.pubkey(),    // authority
        &[&fee_payer.pubkey()], // signer keys
    )?;

    // Create transaction for closing the mint account
    let transaction = Transaction::new_signed_with_payer(
        &[close_mint_instruction],
        Some(&fee_payer.pubkey()),
        &[&fee_payer],
        latest_blockhash,
    );

    // Send and confirm transaction
    client.send_and_confirm_transaction(&transaction).await?;

    // Try to fetch the mint account (should fail)
    match client.get_account(&mint.pubkey()).await {
        Ok(_) => println!("\nMint account still exists (unexpected)"),
        Err(e) => println!("\nMint account successfully closed: {:#?}", e),
    }

    Ok(())
}

Console

Click to execute the code.

Rust

use anyhow::Result;
use solana_client::nonblocking::rpc_client::RpcClient;
use solana_commitment_config::CommitmentConfig;
use solana_sdk::{
    signature::{Keypair, Signer},
    transaction::Transaction,
};
use solana_system_interface::instruction::create_account;
use spl_token_2022_interface::{
    extension::{
        mint_close_authority::MintCloseAuthority, BaseStateWithExtensions, ExtensionType,
        StateWithExtensions,
    },
    instruction::{close_account, initialize_mint, initialize_mint_close_authority},
    state::Mint,
    ID as TOKEN_2022_PROGRAM_ID,
};

#[tokio::main]
async fn main() -> Result<()> {
    // Create connection to local validator
    let client = RpcClient::new_with_commitment(
        String::from("http://localhost:8899"),
        CommitmentConfig::confirmed(),
    );
    let latest_blockhash = client.get_latest_blockhash().await?;

    // Generate a new keypair for the fee payer
    let fee_payer = Keypair::new();

    // Generate a keypair for the destination
    let destination = Keypair::new();

    // Airdrop 5 SOL to fee payer
    let airdrop_signature = client
        .request_airdrop(&fee_payer.pubkey(), 5_000_000_000)
        .await?;

    loop {
        let confirmed = client.confirm_transaction(&airdrop_signature).await?;
        if confirmed {
            break;
        }
    }

    // Generate keypair to use as address of mint
    let mint = Keypair::new();

    // Get default mint account size (in bytes),
    let mint_space =
        ExtensionType::try_calculate_account_len::<Mint>(&[ExtensionType::MintCloseAuthority])?;

    // get the rent in lamports for the mint account
    let mint_rent = client
        .get_minimum_balance_for_rent_exemption(mint_space)
        .await?;

    // Instruction to create new account for mint
    let create_account_instruction = create_account(
        &fee_payer.pubkey(),    // payer
        &mint.pubkey(),         // new account (mint)
        mint_rent,              // lamports
        mint_space as u64,      // space
        &TOKEN_2022_PROGRAM_ID, // program id
    );

    let initialize_close_mint_instruction = initialize_mint_close_authority(
        &TOKEN_2022_PROGRAM_ID,    // token program
        &mint.pubkey(),            // mint
        Some(&fee_payer.pubkey()), // close authority
    )?;

    // Instruction to initialize mint account data
    let initialize_mint_instruction = initialize_mint(
        &TOKEN_2022_PROGRAM_ID,    // token program
        &mint.pubkey(),            // mint
        &fee_payer.pubkey(),       // mint authority
        Some(&fee_payer.pubkey()), // freeze authority
        9,                         // decimals
    )?;

    // Create transaction and add instructions
    let transaction = Transaction::new_signed_with_payer(
        &[
            create_account_instruction,
            initialize_close_mint_instruction,
            initialize_mint_instruction,
        ],
        Some(&fee_payer.pubkey()),
        &[&fee_payer, &mint],
        latest_blockhash,
    );

    // Send and confirm transaction
    client.send_and_confirm_transaction(&transaction).await?;

    println!("Mint Address: {}", mint.pubkey());

    // Fetch mint account
    let mint_account = client.get_account(&mint.pubkey()).await?;
    // Deserialize the mint account with extensions
    let mint_state = StateWithExtensions::<Mint>::unpack(&mint_account.data)?;

    // Get all extension types enabled on this mint
    let mint_extension_types = mint_state.get_extension_types()?;
    println!("\nMint extensions enabled: {:?}", mint_extension_types);

    // Deserialize the MintCloseAuthority extension data
    let mint_close_authority = mint_state.get_extension::<MintCloseAuthority>()?;
    println!("\n{:#?}", mint_close_authority);

    let close_mint_instruction = close_account(
        &TOKEN_2022_PROGRAM_ID, // token program
        &mint.pubkey(),         // mint
        &destination.pubkey(),  // destination
        &fee_payer.pubkey(),    // authority
        &[&fee_payer.pubkey()], // signer keys
    )?;

    // Create transaction for closing the mint account
    let transaction = Transaction::new_signed_with_payer(
        &[close_mint_instruction],
        Some(&fee_payer.pubkey()),
        &[&fee_payer],
        latest_blockhash,
    );

    // Send and confirm transaction
    client.send_and_confirm_transaction(&transaction).await?;

    // Try to fetch the mint account (should fail)
    match client.get_account(&mint.pubkey()).await {
        Ok(_) => println!("\nMint account still exists (unexpected)"),
        Err(e) => println!("\nMint account successfully closed: {:#?}", e),
    }

    Ok(())
}

Console

Click to execute the code.

Đóng Mint

Cách kích hoạt tiện ích mở rộng MintCloseAuthority

Typescript

Rust

Mục lục