Apa Fungsi Pembakaran?
Membakar token secara permanen mengurangi saldo token account dan mengurangi total pasokan mint dalam jumlah yang sama.
Cara Membakar Token
Membakar token menggunakan instruksi Burn atau BurnChecked dari
Token Program.
Contoh di bawah ini menggunakan BurnChecked, yang mengharuskan pemanggil
menyediakan desimal mint sehingga instruksi dapat memverifikasi presisi token
yang diharapkan sebelum membakar.
Native mint tidak mendukung pembakaran.
Gunakan CloseAccount sebagai gantinya.
Pemilik token account atau delegasi yang disetujui menandatangani transaksi. Dalam Token Extensions Program, delegasi permanen mint juga dapat mengotorisasi pembakaran jika mint memiliki ekstensi delegasi permanen yang diaktifkan.
Referensi Sumber
| Item | Deskripsi | Token Program | Token Extensions Program |
|---|---|---|---|
Mint | State mint menyimpan total pasokan token. | Sumber | Sumber |
Account | State token account menyimpan saldo token yang dikurangi oleh pembakaran. | Sumber | Sumber |
Burn | Instruksi burn yang mengurangi saldo token account dan pasokan mint tanpa mengharuskan pemanggil menyediakan desimal mint. | Sumber | Sumber |
BurnChecked | Instruksi burn yang mengharuskan pemanggil menyediakan desimal mint dan memeriksa nilai tersebut sebelum mengurangi saldo token account dan pasokan mint. | Sumber | Sumber |
process_burn | Logika prosesor bersama untuk pembakaran token. | Sumber | Sumber |
Typescript
Contoh Kit di bawah ini menunjukkan pendekatan yang direkomendasikan
menggunakan @solana/kit. Contoh lama menggunakan @solana/web3.js disertakan
sebagai referensi.
Kit
import { generateKeyPairSigner } from "@solana/kit";import { createLocalClient } from "@solana/kit-client-rpc";import {findAssociatedTokenPda,tokenProgram,TOKEN_PROGRAM_ADDRESS} from "@solana-program/token";const client = await createLocalClient().use(tokenProgram());const mint = await generateKeyPairSigner();const [tokenAccount] = await findAssociatedTokenPda({mint: mint.address,owner: client.payer.address,tokenProgram: TOKEN_PROGRAM_ADDRESS});const result = await client.token.instructions.burnChecked({account: tokenAccount, // Token account holding the tokens to burn.mint: mint.address, // Mint for the token being burned.authority: client.payer, // Owner or delegate approving the burn.amount: 25n, // Token amount in base units.decimals: 2 // Decimals defined on the mint account.}).sendTransaction();const mintAccount = await client.token.accounts.mint.fetch(mint.address);const tokenAccountData = await client.token.accounts.token.fetch(tokenAccount);console.log("Mint Address:", mint.address);console.log("Mint Account:", mintAccount.data);console.log("\nToken Account Address:", tokenAccount);console.log("Token Account:", tokenAccountData.data);console.log("\nTransaction Signature:", result.context.signature);
Web3.js
import { Connection, Keypair, LAMPORTS_PER_SOL } from "@solana/web3.js";import {createAssociatedTokenAccount,burnChecked,createMint,getAccount,getMint,mintToChecked,TOKEN_PROGRAM_ID} from "@solana/spl-token";const result = await burnChecked(connection, // Connection to the local validator.feePayer, // Account paying transaction fees.associatedTokenAccount, // Token account holding the tokens to burn.mintPubkey, // Mint for the token being burned.feePayer, // Owner or delegate approving the burn.25, // Token amount in base units.2, // Decimals defined on the mint account.[], // Additional multisig signers.{commitment: "confirmed" // Confirmation options for the transaction.},TOKEN_PROGRAM_ID // Token program to invoke.);const mintAccount = await getMint(connection,mintPubkey,"confirmed",TOKEN_PROGRAM_ID);const tokenAccountData = await getAccount(connection,associatedTokenAccount,"confirmed",TOKEN_PROGRAM_ID);console.log("Mint Address:", mintPubkey.toBase58());console.log("Mint Account:", mintAccount);console.log("\nAssociated Token Account Address:",associatedTokenAccount.toBase58());console.log("Associated Token Account:", tokenAccountData);console.log("\nTransaction Signature:", result);
Rust
use anyhow::Result;use solana_client::nonblocking::rpc_client::RpcClient;use solana_commitment_config::CommitmentConfig;use solana_sdk::{program_pack::Pack,signature::{Keypair, Signer},transaction::Transaction,};use solana_system_interface::instruction::create_account;use spl_associated_token_account_interface::{address::get_associated_token_address, instruction::create_associated_token_account,};use spl_token_interface::{id as token_program_id,instruction::{burn_checked, initialize_mint, mint_to_checked},state::{Account, Mint},};#[tokio::main]async fn main() -> Result<()> {let client = RpcClient::new_with_commitment(String::from("http://localhost:8899"),CommitmentConfig::confirmed(),);let burn_amount = 25;let transaction = Transaction::new_signed_with_payer(&[burn_checked(&token_program_id(), // Token program to invoke.&associated_token_address, // Token account holding the tokens to burn.&mint.pubkey(), // Mint for the token being burned.&fee_payer.pubkey(), // Owner or delegate approving the burn.&[], // Additional multisig signers.burn_amount, // Token amount in base units.decimals, // Decimals defined on the mint account.)?,],Some(&fee_payer.pubkey()),&[&fee_payer],latest_blockhash,);let transaction_signature = client.send_and_confirm_transaction(&transaction).await?;let mint_account = client.get_account(&mint.pubkey()).await?;let mint_data = Mint::unpack(&mint_account.data)?;let token_account = client.get_account(&associated_token_address).await?;let token_data = Account::unpack(&token_account.data)?;println!("Mint Address: {}", mint.pubkey());println!("Mint Account: {:#?}", mint_data);println!("\nAssociated Token Account Address: {}",associated_token_address);println!("Associated Token Account: {:#?}", token_data);println!("\nTransaction Signature: {}", transaction_signature);Ok(())}
Python
#!/usr/bin/env python3import asyncioimport jsonfrom solana.rpc.async_api import AsyncClientfrom solders.keypair import Keypairfrom solders.message import Messagefrom solders.pubkey import Pubkeyfrom solders.system_program import create_account, CreateAccountParamsfrom solders.transaction import Transactionfrom spl.token.async_client import AsyncTokenfrom spl.token.instructions import (burn_checked,BurnCheckedParams,create_associated_token_account,get_associated_token_address,initialize_mint,InitializeMintParams,mint_to_checked,MintToCheckedParams,)from spl.token.constants import MINT_LEN, TOKEN_PROGRAM_IDDECIMALS = 2AMOUNT_TO_MINT = 100AMOUNT_TO_BURN = 25async def main():rpc = AsyncClient("http://localhost:8899")async with rpc:burn_tokens_instruction = burn_checked(BurnCheckedParams(program_id=TOKEN_PROGRAM_ID, # Token program to invoke.mint=mint.pubkey(), # Mint for the token being burned.account=token_account_address, # Token account whose balance decreases.owner=fee_payer.pubkey(), # Account that owns the token account and signs the transaction.amount=AMOUNT_TO_BURN, # Token amount in base units.decimals=DECIMALS, # Decimals defined on the mint account.))latest_blockhash = await rpc.get_latest_blockhash()transaction = Transaction([fee_payer],Message([burn_tokens_instruction], fee_payer.pubkey()),latest_blockhash.value.blockhash,)result = await rpc.send_transaction(transaction)mint_info = await token.get_mint_info()token_account_info = await token.get_account_info(token_account_address)mint_account = {key: str(value) if isinstance(value, Pubkey) else valuefor key, value in mint_info._asdict().items()}token_account = {key: str(value) if isinstance(value, Pubkey) else valuefor key, value in token_account_info._asdict().items()}print("Mint Address:", mint.pubkey())print("Mint Account:")print(json.dumps(mint_account, indent=2))print("\nToken Account Address:", token_account_address)print("Token Account:")print(json.dumps(token_account, indent=2))print("\nTransaction Signature:", result.value)if __name__ == "__main__":asyncio.run(main())
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