Refactor create_event for readability and LoB

lib/gc_index_relay/nostr.ex

@@ -33,23 +33,16 @@ defmodule GcIndexRelay.Nostr do
   def create_event(event) when is_struct(event, PubEvent) do
     with {:ok, event} <- Validator.validate_id(event),
          {:ok, event} <- Validator.validate_signature(event) do
-      case do_create_event(event) do
+      db_event = PubEvent.to_db(event)
-        {:ok, result} -> {:ok, result}
+
-        {:error, reason} -> {:error, reason}
+      %Event{}
-      end
+      |> Event.changeset(Map.from_struct(db_event))
+      |> Repo.insert()
     else
       {:error, reason} -> {:error, reason}
     end
   end
 
-  defp do_create_event(event) when is_struct(event, PubEvent) do
-    db_event = PubEvent.to_db(event)
-
-    %Event{}
-    |> Event.changeset(Map.from_struct(db_event))
-    |> Repo.insert()
-  end
-
   @doc """
   Deletes a `GcIndexRelay.Nostr.PubEvent` from the database.
   """