find out how many times the message was tried to be reprocessed?

[AlexandrTQ]

I mean something like this:

		jscontext, err := cons.Consume(func(msg jetstream.Msg) {
			// msg.RetriesCount()
			msg.Nak()
		})

There is a MaxDeliver field here that limits the number of attempts to reprocess a message. It seems obvious that it should be possible to get the current number of deliver to understand whether a given processing is the last one or not.
However, I don't see a similar method in jetstream.Msg, and I haven't found any information about it at all.

[Jarema]

You can access that property by calling Metadata() on the message:

https://pkg.go.dev/github.com/nats-io/nats.go/jetstream#Msg

In field NumDelivered