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Acknowledging

You must call notification.ack() to confirm processing: 
connection.on('rule.violated', 'order_placed', async (notification) => {
  try {
    await processViolation(notification);
    notification.ack();  // ACK on success
  } catch (error) {
    // Don't ACK - notification redelivered after 30s (max 3 attempts)
  }
});

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Retry Behavior

AttemptDelayAction
10sInitial delivery
230sFirst retry (if no ACK)
330sSecond retry (if no ACK)
Failed-Moved to Dead Letter Queue

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Next Steps

Notification Architecture

Learn about notification internals

Getting Threads

Query historical thread data