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Batching is automatic—control it via `batch(100)` or `batch({ size: 50, timeoutMs: 1000 })` to trade latency for throughput.

Rate limiting is built in: configure token buckets, sliding windows, or adaptive limits that respond to backpressure.

await stream.ack(event.id); const pipeline = stream.filter(e => e.amount > 100).map(e => ( ...e, fee: e.amount * 0.03 )).on('error', (err) => logger.error(err));

Each event flows through a series of transformation stages, with built-in support for filtering, mapping, and conditional routing.

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The SDK provides both callback-based and Promise-based APIs, so you can use it with callbacks, async/await, or Observables.

stream.on('*.created', async (event) =>  await db.insert('events', event); ,  concurrency: 50 );

Graceful shutdown waits for in-flight events to complete, then closes connections cleanly—no lost events, no crashes.