Streaming de datos de Solana Pump AMM con LaserStream

mkdir pump-monitor && cd pump-monitor
npm init -y
npm install helius-laserstream bs58
npm install --save-dev typescript ts-node @types/node
npx tsc --init
export HELIUS_API_KEY=your-key-here

import { subscribe, CommitmentLevel, LaserstreamConfig, SubscribeRequest } from 'helius-laserstream';
import bs58 from 'bs58';

const PUMP_PROGRAM_ID = '6EF8rrecthR5Dkzon8Nwu78hRvfCKubJ14M5uBEwF6P';

// Rolling stats across the session.
const stats = {
  startedAt: Date.now(),
  transactions: 0,
  successes: 0,
  failures: 0,
  uniquePayers: new Set<string>(),
  totalFeesLamports: 0,
  accountUpdates: 0,
};

async function handleUpdate(data: any) {
  if (data.transaction) {
    const tx = data.transaction.transaction;
    if (!tx) return;

    stats.transactions++;
    const failed = !!tx.meta?.err;
    failed ? stats.failures++ : stats.successes++;

    // tx.meta.fee is a u64 string — coerce before adding.
    stats.totalFeesLamports += Number(tx.meta?.fee ?? 0);

    // Fee payer is the first account in the message.
    const firstKey = tx.transaction?.message?.accountKeys?.[0];
    if (firstKey) {
      const payer = typeof firstKey === 'string' ? firstKey : bs58.encode(firstKey);
      stats.uniquePayers.add(payer);
    }

    // tx.signature is a Buffer in the SDK.
    const sig = bs58.encode(tx.signature);
    const slot = data.transaction.slot;
    const flag = failed ? '❌' : '✅';
    console.log(`${flag}  ${sig.slice(0, 12)}…  slot ${slot}  fee ${tx.meta?.fee} lamports`);
  }

  if (data.account) {
    stats.accountUpdates++;
    const acct = data.account.account;
    const pubkey = typeof acct.pubkey === 'string' ? acct.pubkey : bs58.encode(acct.pubkey);
    console.log(`📋  account ${pubkey}  ${acct.data?.length ?? 0} bytes`);
  }
}

function printReport() {
  const minutes = (Date.now() - stats.startedAt) / 60_000;
  console.log('\n📊  Pump.fun activity report');
  console.log(`   Runtime:           ${minutes.toFixed(1)} min`);
  console.log(`   Transactions:      ${stats.transactions} (${stats.successes} ok, ${stats.failures} failed)`);
  console.log(`   Throughput:        ${(stats.transactions / Math.max(minutes, 0.0001)).toFixed(1)} tx/min`);
  console.log(`   Unique fee payers: ${stats.uniquePayers.size}`);
  console.log(`   Total fees:        ${(stats.totalFeesLamports / 1e9).toFixed(4)} SOL`);
  console.log(`   Account updates:   ${stats.accountUpdates}\n`);
}

async function main() {
  const config: LaserstreamConfig = {
    apiKey: process.env.HELIUS_API_KEY ?? 'YOUR_API_KEY',
    endpoint: 'https://laserstream-mainnet-ewr.helius-rpc.com', // pick the region closest to you
  };

  const subscriptionRequest: SubscribeRequest = {
    accounts: {
      'pump-accounts': {
        account: [],
        owner: [PUMP_PROGRAM_ID],
        filters: [],
      },
    },
    transactions: {
      'pump-transactions': {
        accountInclude: [PUMP_PROGRAM_ID],
        accountExclude: [],
        accountRequired: [],
        vote: false,
        failed: false,
      },
    },
    commitment: CommitmentLevel.CONFIRMED,
    slots: {},
    transactionsStatus: {},
    blocks: {},
    blocksMeta: {},
    entry: {},
    accountsDataSlice: [],
  };

  console.log('🚀  Streaming Pump.fun activity. Press Ctrl+C to stop.\n');

  const reportTimer = setInterval(printReport, 60_000);
  process.on('SIGINT', () => {
    clearInterval(reportTimer);
    printReport();
    process.exit(0);
  });

  await subscribe(config, subscriptionRequest, handleUpdate, async (error) => {
    console.error('Stream error:', error);
  });
}

main().catch(console.error);