When remote follows local, hold off sending Accept if remote identity…

… is not fully fetched (#676)

users/models/follow.py

@@ -17,7 +17,7 @@
 class FollowStates(StateGraph):
     unrequested = State(try_interval=600)
     pending_approval = State(externally_progressed=True)
-    accepting = State(try_interval=24 * 60 * 60)
+    accepting = State(try_interval=600)
     rejecting = State(try_interval=24 * 60 * 60)
     accepted = State(externally_progressed=True)
     undone = State(try_interval=24 * 60 * 60)
@@ -92,6 +92,9 @@ def handle_unrequested(cls, instance: "Follow"):
     @classmethod
     def handle_accepting(cls, instance: "Follow"):
         if not instance.source.local:
+            # Don't send Accept if remote identity wasn't fetch yet
+            if not instance.source.inbox_uri:
+                return
             # send an Accept object to the source server
             try:
                 instance.target.signed_request(