We can do this via the store's aforementioned failure reporting. I guess it could be better? I prefer to have a log of all messages since forever, as in Event

We can do this via the store's aforementioned failure reporting. I guess it could be better? I prefer to have a log of all messages since forever, as in Event Sourcing. Seems like that is more trouble than it's worth to try to make everything happen purely on a message bus, though the mechanism for letting the system know a new event arrived is a message bus, it just includes the message id, for us.