使用 gRPC 进行预处理交易

import {
  subscribePreprocessed,
  CommitmentLevel,
  LaserstreamConfig,
  SubscribePreprocessedRequest,
  SubscribePreprocessedUpdate
} from 'helius-laserstream';
import bs58 from 'bs58';

async function streamPreprocessedTransactions() {
  const config: LaserstreamConfig = {
    apiKey: 'YOUR_API_KEY',
    endpoint: 'https://laserstream-mainnet-ewr.helius-rpc.com',
  };

  const request: SubscribePreprocessedRequest = {
    transactions: {
      "jupiter-swaps": {
        vote: false,
        accountInclude: ['JUP6LkbZbjS1jKKwapdHNy74zcZ3tLUZoi5QNyVTaV4']
      }
    }
  };

  const stream = await subscribePreprocessed(
    config,
    request,
    async (update: SubscribePreprocessedUpdate) => {
      if (update.transaction) {
        const tx = update.transaction;
        const signature = bs58.encode(tx.transaction.signature);

        console.log('⚡ Preprocessed transaction received:');
        console.log(`  Signature: ${signature}`);
        console.log(`  Slot: ${tx.slot}`);
        console.log(`  Is Vote: ${tx.transaction.isVote}`);
        console.log(`  Filters: ${update.filters.join(', ')}`);
        console.log('---');
      }
    },
    async (error) => {
      console.error('Stream error:', error);
    }
  );

  console.log(`✅ Preprocessed stream started (id: ${stream.id})`);

  // Graceful shutdown
  process.on('SIGINT', () => {
    console.log('\n🛑 Shutting down stream...');
    stream.cancel();
    process.exit(0);
  });
}

streamPreprocessedTransactions().catch(console.error);

use futures::StreamExt;
use helius_laserstream::{
    grpc::{SubscribePreprocessedRequest, SubscribePreprocessedRequestFilterTransactions},
    subscribe_preprocessed, LaserstreamConfig,
};

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let config = LaserstreamConfig {
        endpoint: "https://laserstream-mainnet-ewr.helius-rpc.com".to_string(),
        api_key: "YOUR_API_KEY".to_string(),
        ..Default::default()
    };

    let mut request = SubscribePreprocessedRequest::default();
    request.transactions.insert(
        "jupiter-swaps".to_string(),
        SubscribePreprocessedRequestFilterTransactions {
            vote: Some(false),
            account_include: vec![
                "JUP6LkbZbjS1jKKwapdHNy74zcZ3tLUZoi5QNyVTaV4".to_string()
            ],
            ..Default::default()
        },
    );

    let (stream, _handle) = subscribe_preprocessed(config, request);
    tokio::pin!(stream);

    println!("✅ Preprocessed stream started");

    while let Some(result) = stream.next().await {
        match result {
            Ok(update) => {
                if let Some(tx) = update.transaction {
                    println!("⚡ Preprocessed transaction:");
                    println!("  Slot: {}", tx.slot);
                    println!("  Is Vote: {}", tx.transaction.is_vote);
                    println!("---");
                }
            }
            Err(e) => {
                eprintln!("Stream error: {:?}", e);
                break;
            }
        }
    }

    Ok(())
}

package main

import (
    "log"
    "os"
    "os/signal"
    "syscall"

    laserstream "github.com/helius-labs/laserstream-sdk/go"
    pb "github.com/helius-labs/laserstream-sdk/go/proto"
)

func main() {
    log.SetFlags(0)

    clientConfig := laserstream.LaserstreamConfig{
        Endpoint: "https://laserstream-mainnet-ewr.helius-rpc.com",
        APIKey:   "YOUR_API_KEY",
    }

    voteFilter := false
    subscriptionRequest := &pb.SubscribePreprocessedRequest{
        Transactions: map[string]*pb.SubscribePreprocessedRequestFilterTransactions{
            "jupiter-swaps": {
                Vote: &voteFilter,
                AccountInclude: []string{
                    "JUP6LkbZbjS1jKKwapdHNy74zcZ3tLUZoi5QNyVTaV4",
                },
            },
        },
    }

    client := laserstream.NewPreprocessedClient(clientConfig)

    dataCallback := func(data *pb.SubscribePreprocessedUpdate) {
        if data.Transaction != nil {
            log.Println("⚡ Preprocessed transaction:")
            log.Printf("  Slot: %d\n", data.Transaction.Slot)
            log.Printf("  Is Vote: %t\n", data.Transaction.Transaction.IsVote)
            log.Println("---")
        }
    }

    errorCallback := func(err error) {
        log.Printf("Error: %v", err)
    }

    err := client.Subscribe(subscriptionRequest, dataCallback, errorCallback)
    if err != nil {
        log.Fatalf("Failed to subscribe: %v", err)
    }

    log.Println("✅ Preprocessed stream started")
    log.Println("Press Ctrl+C to exit")

    sigChan := make(chan os.Signal, 1)
    signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM)
    <-sigChan

    log.Println("\nShutting down...")
    client.Close()
}

interface SubscribePreprocessedRequest {
  transactions: {
    [filterName: string]: SubscribePreprocessedRequestFilterTransactions
  };
  ping?: SubscribeRequestPing;
}

interface SubscribePreprocessedRequestFilterTransactions {
  vote?: boolean;              // Include/exclude vote transactions
  signature?: string;          // Filter by specific transaction signature
  accountInclude?: string[];   // Include transactions touching these accounts
  accountExclude?: string[];   // Exclude transactions touching these accounts
  accountRequired?: string[];  // Require all these accounts to be present
}

interface SubscribePreprocessedUpdate {
  filters: string[];                             // Which filters matched
  transaction?: SubscribePreprocessedTransaction; // The transaction data
  ping?: SubscribeUpdatePing;                    // Keepalive ping
  pong?: SubscribeUpdatePong;                    // Ping response
  createdAt: Date;                               // When update was created
}

interface SubscribePreprocessedTransaction {
  transaction: SubscribePreprocessedTransactionInfo;
  slot: number;                                  // Slot containing transaction
}

interface SubscribePreprocessedTransactionInfo {
  signature: Uint8Array;                         // Transaction signature
  isVote: boolean;                               // Is this a vote transaction
  transaction: solana.storage.Transaction;       // Full transaction message
}