The consumer configuration

Enable manual ack. When set to true, the client is responsible to ack messages.

The name of the stream

An optional callback to process messages - note that iterators are the preferred way of processing messages.

The consumer name

Only applicable to push consumers. When set to true, the consumer will be an ordered consumer.

Standard option for all subscriptions. Defines the maximum number of messages dispatched by the server before stopping the subscription. For JetStream this may not be accurate as JetStream can add additional protocol messages that could count towards this limit.

Only applicable to push consumers, allows the pull subscriber to horizontally load balance.

If true, the client will only attempt to bind to the specified consumer name/durable on the specified stream. If the consumer is not found, the subscribe will fail