小费交易 - BlockRush Document

使用我们的 SWQoS，您可以使用默认的优先费用（无需特别设置），使用小费作为优先选项。在构建交易时，您需要向交易中添加一个小费转账指令，以加速交易打包进区块。示例代码生成的 base64 编码交易数据可以直接通过 SDK 方法调用，例如传递给 send_transaction。

Rust
JS & TS

pub const MEMO_PROGRAM_ID: &str = "MemoSq4gqABAXKb96qnH8TysNcWxMyWCqXgDLGmfcHr";
pub const BLOCKRUSH_TIP_WALLET: &str = "AhMVT9KWLGjBbzvdqQkTt4vHwpawnGNoGSqaqXYftNDR";
pub const DEFAULT_TIP_AMOUNT: u64 = 1_000_000; // 0.001 SOL

pub fn create_blockrush_tip_ix(pubkey: Pubkey, tip_amount:u64) -> Instruction {
    let tip_ix =
        instruction::transfer(
            &pubkey,
            &Pubkey::from_str(BLOCKRUSH_TIP_WALLET).unwrap(),
            tip_amount,
        );
    tip_ix
}

fn create_memo_tx_with_tip(msg: &[u8], payer: &Keypair, blockhash: Hash) -> Transaction {
    let memo = Pubkey::from_str(MEMO_PROGRAM_ID).unwrap();
    let instruction = Instruction::new_with_bytes(memo, msg, vec![]);
    let mut instructions = vec![instruction];
    let tip_ix = create_blockrush_tip_ix(payer.pubkey(), TIP_AMOUNT);
    instructions.push(tip_ix);
    let message = Message::new(&instructions, Some(&payer.pubkey()));
    Transaction::new(&[payer], message, blockhash)
}

let test_tx = create_memo_tx_with_tip(b"this is a demo tx", &keypair, latest_hash);
let serialized_test_tx = bincode::serialize(&test_tx)?;
let base64_test_tx = BASE64_STANDARD.encode(&serialized_test_tx);

const ixs = {your instructions ixs};
const keypair = {your_actual_keypair};
const TIP_AMOUNT = 1_000_000; // 0.001 SOL;
const BLOCKRUSH_TIP = new PublicKey("AhMVT9KWLGjBbzvdqQkTt4vHwpawnGNoGSqaqXYftNDR");

// 添加小费支付指令
ixs.push(
    SystemProgram.transfer({
        fromPubkey: keypair.publicKey,
        toPubkey: BLOCKRUSH_TIP,
        lamports: TIP_AMOUNT,
    }),
);

// 编译并签名交易指令
const messageV0 = new TransactionMessage({
    payerKey: keypair.publicKey,
    recentBlockhash: latestBlockhash.blockhash,
    instructions: ixs,
}).compileToV0Message();
const transaction = new VersionedTransaction(messageV0);
transaction.sign([keypair]);

// 获取完全签名交易的 Base64 编码字符串
const transactionRaw = Buffer.from(transaction.serialize()).toString('base64');

SOLANA