Can external events be bound (binded?) to state or intent? So for instance, imagine you are subscribed to some sort of event over the network that should update your state.

Sure. You can either bind them to Store Intents or subscribe to the source internally (e.g. in the Bootstrapper). I usually prefer the former way.

Would you create the external event as some sort of Event? Or just any old object.

Probably network events are already well typed, just bind them to Intents via a mapper.

👍