uniqueKey method
Returns a unique tag for this event that you can use to identify it.
Implementation
NostrEventKey uniqueKey() {
if (subscriptionId == null) {
throw Exception(
"You can't get a unique key for an event that you created, you can only get a unique key for an event that you got from the relays",
);
}
return NostrEventKey(
eventId: id,
sourceSubscriptionId: subscriptionId!,
originalSourceEvent: this,
);
}