Token Yakma

Yakma Ne İşe Yarar?

Token yakmak, bir token hesap bakiyesini kalıcı olarak azaltır ve mint'in toplam arzını aynı miktarda düşürür.

Token Nasıl Yakılır

Token yakmak için Token Program'ın Burn veya BurnChecked talimatı kullanılır.

Aşağıdaki örnekler BurnChecked kullanır; bu talimat, yakmadan önce beklenen token hassasiyetini doğrulayabilmek için çağıranın mint'in ondalık basamak sayısını sağlamasını gerektirir.

Native mint yakmayı desteklemez. Bunun yerine CloseAccount kullanın.

Token hesap sahibi veya onaylanmış bir delege işlemi imzalar. Token Extensions Program'da, mint'te kalıcı delege uzantısı etkinleştirilmişse, bir mint kalıcı delegesi de yakmayı yetkilendirebilir.

Kaynak Referansı

ÖğeAçıklamaToken ProgramToken Extensions Program
MintMint durumu, toplam token arzını saklar.KaynakKaynak
AccountToken hesap durumu, bir yakma işlemiyle azaltılan token bakiyesini saklar.KaynakKaynak
BurnÇağıranın mint'in ondalık basamak sayısını sağlamasını gerektirmeden bir token hesap bakiyesini ve mint arzını azaltan yakma talimatı.KaynakKaynak
BurnCheckedÇağıranın mint'in ondalık basamak sayısını sağlamasını gerektiren ve bir token hesap bakiyesini ile mint arzını azaltmadan önce bu değeri kontrol eden yakma talimatı.KaynakKaynak
process_burnToken yakma işlemleri için paylaşılan işlemci mantığı.KaynakKaynak

Typescript

Aşağıdaki Kit örnekleri, @solana/kit kullanılarak önerilen yaklaşımı göstermektedir. Referans olması için @solana/web3.js kullanan eski örnekler de eklenmiştir.

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);
Console
Click to execute the code.

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);
Console
Click to execute the code.

Rust

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(())
}
Console
Click to execute the code.

Python

Python
#!/usr/bin/env python3
import asyncio
import json
from solana.rpc.async_api import AsyncClient
from solders.keypair import Keypair
from solders.message import Message
from solders.pubkey import Pubkey
from solders.system_program import create_account, CreateAccountParams
from solders.transaction import Transaction
from spl.token.async_client import AsyncToken
from 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_ID
DECIMALS = 2
AMOUNT_TO_MINT = 100
AMOUNT_TO_BURN = 25
async 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 value
for key, value in mint_info._asdict().items()
}
token_account = {
key: str(value) if isinstance(value, Pubkey) else value
for 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())
Console
Click to execute the code.

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