Fix:

`_is_subscribed_to_msg` need only subscribe to one of the topics

libp2p/pubsub/pubsub.py

@@ -1,17 +1,7 @@
 import asyncio
 from collections import namedtuple
 import time
-from typing import (
-    Any,
-    Awaitable,
-    Callable,
-    Dict,
-    Iterable,
-    List,
-    Tuple,
-    Union,
-    TYPE_CHECKING,
-)
+from typing import TYPE_CHECKING, Any, Awaitable, Callable, Dict, Iterable, List, Tuple, Union
 
 from lru import LRU
 
@@ -381,9 +371,7 @@ class Pubsub:
         async_topic_validator_futures = []
         for topic_validator in self.get_msg_validators(msg):
             if topic_validator.is_async:
-                async_topic_validator_futures.append(
-                    topic_validator.validator(msg_forwarder, msg)
-                )
+                async_topic_validator_futures.append(topic_validator.validator(msg_forwarder, msg))
             else:
                 sync_topic_validators.append(topic_validator.validator)
 
@@ -448,4 +436,4 @@ class Pubsub:
     def _is_subscribed_to_msg(self, msg: rpc_pb2.Message) -> bool:
         if not self.my_topics:
             return False
-        return all([topic in self.my_topics for topic in msg.topicIDs])
+        return any([topic in self.my_topics for topic in msg.topicIDs])

tests/pubsub/test_pubsub.py

@@ -183,16 +183,10 @@ async def test_get_msg_validators(pubsubs_fsub):
 
 @pytest.mark.parametrize("num_hosts", (1,))
 @pytest.mark.parametrize(
-    "is_topic_1_val_passed, is_topic_2_val_passed",
-    (
-        (False, True),
-        (True, False),
-        (True, True),
-    )
+    "is_topic_1_val_passed, is_topic_2_val_passed", ((False, True), (True, False), (True, True))
 )
 @pytest.mark.asyncio
 async def test_validate_msg(pubsubs_fsub, is_topic_1_val_passed, is_topic_2_val_passed):
-
     def passed_sync_validator(peer_id, msg):
         return True