@spec ack(message :: Gnat.message()) :: :ok

Sends AckAck acknowledgement to the server.

Acknowledges a message was completely handled.

@spec ack_next(message :: Gnat.message(), consumer_subject :: binary()) :: :ok

Sends AckNext acknowledgement to the server.

Acknowledges the message was handled and requests delivery of the next message to the reply subject. Only applies to Pull-mode.

@spec ack_progress(message :: Gnat.message()) :: :ok

Sends AckProgress acknowledgement to the server.

When sent before the AckWait period indicates that work is ongoing and the period should be extended by another equal to AckWait.

@spec ack_term(message :: Gnat.message()) :: :ok

Sends AckTerm acknowledgement to the server.

Instructs the server to stop redelivery of a message without acknowledging it as successfully processed.

@spec nack(message :: Gnat.message()) :: :ok

Sends AckNak acknowledgement to the server.

Signals that the message will not be processed now and processing can move onto the next message. NAK'd message will be retried.