[frankdejonge]

Any exposed information should be exposed deliberately. Although I didn't cover it in this post. In my event-driven setups, events are always wrapped in a message envelope data structure. Where a message is contains 1) the event/payload and 2) a set of headers to carry more "system-y" data, like time of recording, system of origin, and other observability related information. The event ID is one of those values.