Fix processing for forwarded transient activities

app/activitypub.py

@@ -240,7 +240,7 @@ def object_visibility(ap_activity: RawObject, actor: "Actor") -> VisibilityEnum:
 
 
 def get_actor_id(activity: RawObject) -> str:
-    if activity["type"] in ["Note", "Article", "Video", "Question", "Page"]:
+    if "attributedTo" in activity:
         attributed_to = as_list(activity["attributedTo"])
         return get_id(attributed_to[0])
     else:

app/boxes.py

@@ -1239,6 +1239,12 @@ async def save_to_inbox(
             except Exception:
                 raise fastapi.HTTPException(status_code=401, detail="Invalid LD sig")
 
+            # Transient activities from Mastodon like Like are not fetchable and
+            # will return the actor instead
+            if raw_object["id"] != raw_object_id:
+                logger.info(f"Unable to fetch {raw_object_id}")
+                return None
+
     if (
         await db_session.scalar(
             select(func.count(models.InboxObject.id)).where(