feature: event bytes to enum of events (rust)

[ckamm]

It would be helpful if anchor generated a function like:

fn event_from_bytes(bytes: &[u8]) -> Result<Event>;

enum Event {
    Event1(Event1),
    // one for each struct tagged #[event]
}

That finds the matching discriminator and then parses the event.

[acheroncrypto]

It's a bit difficult to get all events in the current codegen, but this can easily be implemented with the new declare-program! macro. Would that be sufficient, or do you need the function to be generated with the program codegen?

[Lou-Kamades]

the new macro is probably sufficient imo