Transfer Ücretleri
TransferFeeExtension nasıl uygulanır
TransferFeeExtension
,
her token transferinde otomatik ücret tahsilatını etkinleştirir. Ücretler, alıcı
token account'larında birikir ve mint account üzerinde ayarlanmış olan para
çekme yetkilisi tarafından çekilebilir.
Typescript
import { getCreateAccountInstruction } from "@solana-program/system";import {extension,getInitializeAccountInstruction,getInitializeMintInstruction,getInitializeTransferFeeConfigInstruction,getMintSize,getTokenSize,TOKEN_2022_PROGRAM_ADDRESS} from "@solana-program/token-2022";import {airdropFactory,appendTransactionMessageInstructions,createSolanaRpc,createSolanaRpcSubscriptions,createTransactionMessage,generateKeyPairSigner,getSignatureFromTransaction,lamports,pipe,sendAndConfirmTransactionFactory,setTransactionMessageFeePayerSigner,setTransactionMessageLifetimeUsingBlockhash,signTransactionMessageWithSigners} from "@solana/kit";// Create Connection, local validator in this exampleconst rpc = createSolanaRpc("http://localhost:8899");const rpcSubscriptions = createSolanaRpcSubscriptions("ws://localhost:8900");// Generate the authority for the mint (also acts as fee payer)const authority = await generateKeyPairSigner();// Fund authority/fee payerawait airdropFactory({ rpc, rpcSubscriptions })({recipientAddress: authority.address,lamports: lamports(5_000_000_000n), // 5 SOLcommitment: "confirmed"});// Generate keypair to use as address of mintconst mint = await generateKeyPairSigner();// And a transfer fee config extension.const transferFees = {epoch: 0n,maximumFee: 1_000_000n,transferFeeBasisPoints: 150 // 1.5%};const transferFeeConfigExtension = extension("TransferFeeConfig", {transferFeeConfigAuthority: authority.address,withdrawWithheldAuthority: authority.address,withheldAmount: 0n,newerTransferFee: transferFees,// Used for transitioning configs. Starts by being the same as newerTransferFee.olderTransferFee: transferFees});// Get mint account size with transfer fee extensionconst space = BigInt(getMintSize([transferFeeConfigExtension]));// 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 createMintAccountInstruction = getCreateAccountInstruction({payer: authority,newAccount: mint,lamports: rent,space,programAddress: TOKEN_2022_PROGRAM_ADDRESS});// Instruction to initialize transfer fee config extensionconst initializeTransferFeeConfigInstruction =getInitializeTransferFeeConfigInstruction({mint: mint.address,transferFeeConfigAuthority: authority.address,withdrawWithheldAuthority: authority.address,transferFeeBasisPoints: 100, // 1% feemaximumFee: 1_000_000n // Maximum fee of 1 token});// Instruction to initialize mint account data// Invokes the token22 programconst initializeMintInstruction = getInitializeMintInstruction({mint: mint.address,decimals: 6,mintAuthority: authority.address,freezeAuthority: authority.address});// Generate keypair to use as address of token accountconst tokenAccount = await generateKeyPairSigner();// get token account sizeconst tokenAccountLen = BigInt(getTokenSize([transferFeeConfigExtension]));// Get minimum balance for rent exemptionconst tokenAccountRent = await rpc.getMinimumBalanceForRentExemption(tokenAccountLen).send();// Instruction to create new account for the token account// Invokes the system programconst createTokenAccountInstruction = getCreateAccountInstruction({payer: authority,newAccount: tokenAccount,lamports: tokenAccountRent,space: tokenAccountLen,programAddress: TOKEN_2022_PROGRAM_ADDRESS});// Instruction to initialize the created token accountconst initializeTokenAccountInstruction = getInitializeAccountInstruction({account: tokenAccount.address,mint: mint.address,owner: authority.address});console.log("token account", tokenAccount.address); // ! debugconst instructions = [createMintAccountInstruction,initializeTransferFeeConfigInstruction,initializeMintInstruction,createTokenAccountInstruction,initializeTokenAccountInstruction];// Create transaction messageconst transactionMessage = pipe(createTransactionMessage({ version: 0 }),(tx) => setTransactionMessageFeePayerSigner(authority, 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", skipPreflight: true });// Get transaction signatureconst transactionSignature = getSignatureFromTransaction(signedTransaction);console.log("Mint Address with Transfer Fees:", mint.address.toString());console.log("Token Account:", tokenAccount.address.toString());console.log("Transfer Fee: 1.5% (150 basis points)");console.log("Maximum Fee: 1 token");console.log("Withdraw Authority:", authority.address.toString());console.log("Transaction Signature:", transactionSignature);
Console
Click to execute the code.
Rust
use anyhow::Result;use solana_client::nonblocking::rpc_client::RpcClient;use solana_sdk::{commitment_config::CommitmentConfig,signature::{Keypair, Signer},system_instruction::create_account,transaction::Transaction,};use spl_token_2022::{ID as TOKEN_2022_PROGRAM_ID,extension::{ExtensionType, transfer_fee::instruction::initialize_transfer_fee_config},instruction::{initialize_account, initialize_mint},state::{Account, 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 5 SOL to fee payerlet airdrop_signature = client.request_airdrop(&fee_payer.pubkey(), 5_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();// Get mint account size with transfer fee extension enabledlet mint_space =ExtensionType::try_calculate_account_len::<Mint>(&[ExtensionType::TransferFeeConfig])?;let mint_rent = client.get_minimum_balance_for_rent_exemption(mint_space).await?;// Instruction to create new account for mint (token22)let create_mint_account_instruction = create_account(&fee_payer.pubkey(), // payer&mint.pubkey(), // new account (mint)mint_rent, // lamportsmint_space as u64, // space&TOKEN_2022_PROGRAM_ID, // program id);// Instruction to initialize transfer fee config extensionlet initialize_transfer_fee_config_instruction = initialize_transfer_fee_config(&TOKEN_2022_PROGRAM_ID, // program_id&mint.pubkey(), // mintSome(&fee_payer.pubkey()), // transfer_fee_config_authoritySome(&fee_payer.pubkey()), // withdraw_withheld_authority100, // transfer_fee_basis_points (1% = 100 basis points)1_000_000, // maximum_fee (1 token with 6 decimals))?;// Instruction to initialize mint account datalet initialize_mint_instruction = initialize_mint(&TOKEN_2022_PROGRAM_ID, // program id&mint.pubkey(), // mint&fee_payer.pubkey(), // mint authoritySome(&fee_payer.pubkey()), // freeze authority6, // decimals)?;// Generate keypair to use as address of token accountlet token_account = Keypair::new();// Get default token account size (in bytes),let token_account_space =ExtensionType::try_calculate_account_len::<Account>(&[ExtensionType::TransferFeeConfig])?;let token_account_rent = client.get_minimum_balance_for_rent_exemption(token_account_space).await?;// Instruction to create new account for token account (token22)let create_token_account_instruction = create_account(&fee_payer.pubkey(), // payer&token_account.pubkey(), // new account (token account)token_account_rent, // renttoken_account_space as u64, // space&TOKEN_2022_PROGRAM_ID, // program id);// initialize token accountlet initialize_token_account = initialize_account(&TOKEN_2022_PROGRAM_ID, // program_id&token_account.pubkey(), // token account&mint.pubkey(), // mint&fee_payer.pubkey(), // authority)?;// Construct transaction with previous instructionslet transaction = Transaction::new_signed_with_payer(&[create_mint_account_instruction,initialize_transfer_fee_config_instruction,initialize_mint_instruction,create_token_account_instruction,initialize_token_account,],Some(&fee_payer.pubkey()),&[&fee_payer, &mint, &token_account],latest_blockhash,);// Send and confirm transactionlet transaction_signature = client.send_and_confirm_transaction(&transaction).await?;println!("Mint Address with Transfer Fees: {}", mint.pubkey());println!("Token Account Address: {}", token_account.pubkey());println!("Transfer Fee: 1% (100 basis points)");println!("Maximum Fee: 1 token");println!("Withdraw Authority: {}", fee_payer.pubkey());println!("\nSuccessfully enabled transfer fees on mint");println!("Transaction Signature: {}", transaction_signature);Ok(())}
Console
Click to execute the code.
Is this page helpful?