Καταστροφή Tokens
Καταστροφή Tokens
Η εντολή
BurnChecked
καταστρέφει μόνιμα tokens μειώνοντας το υπόλοιπο σε ένα token account. Τα
κατεστραμμένα tokens αφαιρούνται από την κυκλοφορία και μειώνεται το supply
που παρακολουθείται στο mint account. Μόνο ο ιδιοκτήτης του token account μπορεί
να καταστρέψει tokens από τον λογαριασμό του.
Το Token Program και το Token Extension Program μοιράζονται παρόμοιες υλοποιήσεις για την επίτευξη της ίδιας λειτουργικότητας.
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 {getCreateAssociatedTokenInstructionAsync,getInitializeMintInstruction,getMintSize,TOKEN_PROGRAM_ADDRESS,findAssociatedTokenPda,getMintToInstruction,getBurnCheckedInstruction,fetchToken} from "@solana-program/token";// Create Connection, local validator in this exampleconst rpc = createSolanaRpc("http://localhost:8899");const rpcSubscriptions = createSolanaRpcSubscriptions("ws://localhost:8900");// Generate keypairs for fee payerconst feePayer = await generateKeyPairSigner();// Fund fee payerawait airdropFactory({ rpc, rpcSubscriptions })({recipientAddress: feePayer.address,lamports: lamports(1_000_000_000n),commitment: "confirmed"});// Generate keypair to use as address of mintconst mint = await generateKeyPairSigner();// Get default mint account size (in bytes), no extensions enabledconst space = BigInt(getMintSize());// Get minimum balance for rent exemptionconst rent = await rpc.getMinimumBalanceForRentExemption(space).send();// Get latest blockhash to include in transactionconst { value: latestBlockhash } = await rpc.getLatestBlockhash().send();// Instruction to create new account for mint (token program)// Invokes the system programconst createAccountInstruction = getCreateAccountInstruction({payer: feePayer,newAccount: mint,lamports: rent,space,programAddress: TOKEN_PROGRAM_ADDRESS});// Instruction to initialize mint account data// Invokes the token programconst initializeMintInstruction = getInitializeMintInstruction({mint: mint.address,decimals: 9,mintAuthority: feePayer.address});// Use findAssociatedTokenPda to derive the ATA addressconst [associatedTokenAddress] = await findAssociatedTokenPda({mint: mint.address,owner: feePayer.address,tokenProgram: TOKEN_PROGRAM_ADDRESS});// Create instruction to create the associated token accountconst createAtaInstruction = await getCreateAssociatedTokenInstructionAsync({payer: feePayer,mint: mint.address,owner: feePayer.address});// Create instruction to mint tokensconst mintToInstruction = getMintToInstruction({mint: mint.address,token: associatedTokenAddress,mintAuthority: feePayer.address,amount: 1000_000_000_000n // 1000.0 tokens with 9 decimals});const instructions = [createAccountInstruction,initializeMintInstruction,createAtaInstruction,mintToInstruction];// Create transaction messageconst transactionMessage = pipe(createTransactionMessage({ version: 0 }),(tx) => setTransactionMessageFeePayerSigner(feePayer, tx),(tx) => setTransactionMessageLifetimeUsingBlockhash(latestBlockhash, tx),(tx) => appendTransactionMessageInstructions(instructions, tx));// Sign transaction message with all required signersconst signedTransaction =await signTransactionMessageWithSigners(transactionMessage);// Send and confirm transactionawait sendAndConfirmTransactionFactory({ rpc, rpcSubscriptions })(signedTransaction,{ commitment: "confirmed" });// Get transaction signatureconst transactionSignature = getSignatureFromTransaction(signedTransaction);console.log("Mint Address:", mint.address.toString());console.log("Associated Token Account Address:",associatedTokenAddress.toString());console.log("Transaction Signature:", transactionSignature);console.log("Successfully minted 1000.0 tokens");// Fetch token account to check balance before burnconst tokenAccountBefore = await fetchToken(rpc, associatedTokenAddress);console.log("\nToken balance before burn:",tokenAccountBefore.data.amount / 10n ** 9n,"tokens");// Get a fresh blockhash for the burn transactionconst { value: burnBlockhash } = await rpc.getLatestBlockhash().send();// Create instruction to burn tokensconst burnInstruction = getBurnCheckedInstruction({account: associatedTokenAddress,mint: mint.address,authority: feePayer.address,amount: 10_000_000_000n, // 10.0 tokens with 9 decimalsdecimals: 9});// Create transaction message for burningconst burnTxMessage = pipe(createTransactionMessage({ version: 0 }),(tx) => setTransactionMessageFeePayerSigner(feePayer, tx),(tx) => setTransactionMessageLifetimeUsingBlockhash(burnBlockhash, tx),(tx) => appendTransactionMessageInstructions([burnInstruction], tx));// Sign transaction message with all required signersconst signedBurnTx = await signTransactionMessageWithSigners(burnTxMessage);// Send and confirm transactionawait sendAndConfirmTransactionFactory({ rpc, rpcSubscriptions })(signedBurnTx,{ commitment: "confirmed" });// Get transaction signatureconst transactionSignature2 = getSignatureFromTransaction(signedBurnTx);// Fetch token account to check balance after burnconst tokenAccountAfter = await fetchToken(rpc, associatedTokenAddress);console.log("Token balance after burn:",tokenAccountAfter.data.amount / 10n ** 9n,"tokens");console.log("\nSuccessfully burned 10.0 tokens");console.log("Transaction Signature:", transactionSignature2);
Console
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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},state::Mint,};#[tokio::main]async fn main() -> Result<()> {// Create connection to local validatorlet 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 payerlet fee_payer = Keypair::new();// Airdrop 1 SOL to fee payerlet airdrop_signature = client.request_airdrop(&fee_payer.pubkey(), 1_000_000_000).await?;client.confirm_transaction(&airdrop_signature).await?;loop {let confirmed = client.confirm_transaction(&airdrop_signature).await?;if confirmed {break;}}// Generate keypair to use as address of mintlet mint = Keypair::new();// Number of decimals for the mintlet decimals = 2;// Get default mint account size (in bytes), no extensions enabledlet mint_space = Mint::LEN;let mint_rent = client.get_minimum_balance_for_rent_exemption(mint_space).await?;// Instruction to create new account for mint (token program)let create_account_instruction = create_account(&fee_payer.pubkey(), // payer&mint.pubkey(), // new account (mint)mint_rent, // lamportsmint_space as u64, // space&token_program_id(), // program id);// Instruction to initialize mint account datalet initialize_mint_instruction = initialize_mint(&token_program_id(),&mint.pubkey(), // mint&fee_payer.pubkey(), // mint authoritySome(&fee_payer.pubkey()), // freeze authoritydecimals, // decimals)?;// Calculate the associated token account address for fee_payerlet associated_token_address = get_associated_token_address(&fee_payer.pubkey(), // owner&mint.pubkey(), // mint);// Instruction to create associated token accountlet create_ata_instruction = create_associated_token_account(&fee_payer.pubkey(), // funding address&fee_payer.pubkey(), // wallet address&mint.pubkey(), // mint address&token_program_id(), // program id);// Amount of tokens to mint (100 tokens with 2 decimals)let amount = 100_00;// Create mint_to instruction to mint tokens to the associated token accountlet mint_to_instruction = mint_to(&token_program_id(),&mint.pubkey(), // mint&associated_token_address, // destination&fee_payer.pubkey(), // authority&[&fee_payer.pubkey()], // signeramount, // amount)?;// Create transaction and add instructionslet transaction = Transaction::new_signed_with_payer(&[create_account_instruction,initialize_mint_instruction,create_ata_instruction,mint_to_instruction,],Some(&fee_payer.pubkey()),&[&fee_payer, &mint],latest_blockhash,);// Send and confirm transactionclient.send_and_confirm_transaction(&transaction).await?;// Fetch token account to check balance before burnlet token_account = client.get_token_account(&associated_token_address).await?;if let Some(token_account) = token_account {println!("Token balance before burn: {} tokens",token_account.token_amount.ui_amount_string);println!("{:#?}", token_account);}let burn_amount = 30_00;// Create burn_checked instructionlet burn_instruction = burn_checked(&token_program_id(), // program id&associated_token_address, // token account&mint.pubkey(), // mint&fee_payer.pubkey(), // owner&[&fee_payer.pubkey()], // signersburn_amount, // amountdecimals, // decimals)?;// Create transaction for burning tokenslet transaction = Transaction::new_signed_with_payer(&[burn_instruction],Some(&fee_payer.pubkey()),&[&fee_payer],latest_blockhash,);// Send and confirm transactionclient.send_and_confirm_transaction(&transaction).await?;let token_account = client.get_token_account(&associated_token_address).await?;if let Some(token_account) = token_account {println!("\nToken balance after burn: {} tokens",token_account.token_amount.ui_amount_string);println!("{:#?}", token_account);}println!("\nMint Supply reduced after burn");let mint_account = client.get_account(&mint.pubkey()).await?;let mint_data = Mint::unpack(&mint_account.data)?;println!("{:#?}", mint_data);Ok(())}
Console
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Python
Python
#!/usr/bin/env python3import asynciofrom solana.rpc.async_api import AsyncClientfrom solders.keypair import Keypairfrom solders.pubkey import Pubkeyfrom solders.transaction import VersionedTransactionfrom solders.message import MessageV0from spl.token.instructions import burn, BurnParamsfrom spl.token.constants import TOKEN_PROGRAM_IDasync def main():rpc = AsyncClient("http://localhost:8899")# Example keypairs and addressespayer = Keypair()owner = Keypair()mint_address = Pubkey.from_string("4zMMC9srt5Ri5X14GAgXhaHii3GnPAEERYPJgZJDncDU")token_account = Pubkey.from_string("GfVPzUxMDvhFJ1Xs6C9i47XQRSapTd8LHw5grGuTquyQ")# Amount to burn (in smallest unit)amount_to_burn = 500000000 # 0.5 tokens with 9 decimalsasync with rpc:# Create burn instructionburn_instruction = burn(BurnParams(program_id=TOKEN_PROGRAM_ID,account=token_account,mint=mint_address,owner=owner.pubkey(),amount=amount_to_burn))# Get latest blockhashrecent_blockhash = await rpc.get_latest_blockhash()# Create messagemessage = MessageV0.try_compile(payer=payer.pubkey(),instructions=[burn_instruction],address_lookup_table_accounts=[],recent_blockhash=recent_blockhash.value.blockhash)# Create transactiontransaction = VersionedTransaction(message, [payer, owner])print(f"Mint: {mint_address}")print(f"Token Account: {token_account}")print(f"Amount to burn: {amount_to_burn}")print(f"Owner: {owner.pubkey()}")print(f"Payer: {payer.pubkey()}")print(f"Burn transaction created successfully")if __name__ == "__main__":asyncio.run(main())
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