Rate limiting is built in: configure token buckets, sliding windows, or adaptive limits that respond to backpressure.
The core relaydb object is a lightweight wrapper that manages the lifecycle of your event stream.
const stream = new RelayKit( apiKey: process.env.API_KEY, region: 'us-east-1' );Metrics are published to standard formats (Prometheus, CloudWatch, DataDog) with zero configuration.
Graceful shutdown waits for in-flight events to complete, then closes connections cleanly—no lost events, no crashes.
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.