Add typing and notes in pubsub

libp2p/pubsub/floodsub.py

@@ -1,3 +1,7 @@
+from libp2p.peer.id import (
+    ID,
+)
+
 from .pb import rpc_pb2
 from .pubsub_router_interface import IPubsubRouter
 
@@ -42,7 +46,7 @@ class FloodSub(IPubsubRouter):
         :param rpc: rpc message
         """
 
-    async def publish(self, sender_peer_id, rpc_message):
+    async def publish(self, from_peer: ID, pubsub_message: rpc_pb2.Message) -> None:
         """
         Invoked to forward a new message that has been validated.
         This is where the "flooding" part of floodsub happens