Merge pull request #184 from NIC619/fix_handle_graft
Fix `gossipsub.handle_graft`
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4819959e5a
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@ -204,6 +204,7 @@ class GossipSub(IPubsubRouter):
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# Add fanout peers to mesh and notifies them with a GRAFT(topic) control message.
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for peer in fanout_peers:
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if peer not in self.mesh[topic]:
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self.mesh[topic].append(peer)
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await self.emit_graft(topic, peer)
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@ -281,7 +282,12 @@ class GossipSub(IPubsubRouter):
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self.mesh[topic]
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)
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for peer in selected_peers:
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fanout_peers_not_in_mesh = [
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peer
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for peer in selected_peers
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if peer not in self.mesh[topic]
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]
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for peer in fanout_peers_not_in_mesh:
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# Add peer to mesh[topic]
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self.mesh[topic].append(peer)
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@ -460,9 +466,11 @@ class GossipSub(IPubsubRouter):
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# Add peer to mesh for topic
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if topic in self.mesh:
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if from_id_str not in self.mesh[topic]:
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self.mesh[topic].append(from_id_str)
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else:
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self.mesh[topic] = [from_id_str]
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# Respond with PRUNE if not subscribed to the topic
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await self.emit_prune(topic, sender_peer_id)
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async def handle_prune(self, prune_msg, sender_peer_id):
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topic = prune_msg.topicID
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@ -98,6 +98,110 @@ async def test_leave():
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await cleanup()
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@pytest.mark.asyncio
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async def test_handle_graft(event_loop, monkeypatch):
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num_hosts = 2
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libp2p_hosts = await create_libp2p_hosts(num_hosts)
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# Create pubsub, gossipsub instances
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_, gossipsubs = create_pubsub_and_gossipsub_instances(libp2p_hosts, \
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SUPPORTED_PROTOCOLS, \
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10, 9, 11, 30, 3, 5, 0.5)
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index_alice = 0
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id_alice = str(libp2p_hosts[index_alice].get_id())
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index_bob = 1
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id_bob = str(libp2p_hosts[index_bob].get_id())
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await connect(libp2p_hosts[index_alice], libp2p_hosts[index_bob])
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# Wait 2 seconds for heartbeat to allow mesh to connect
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await asyncio.sleep(2)
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topic = "test_handle_graft"
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# Only lice subscribe to the topic
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await gossipsubs[index_alice].join(topic)
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# Monkey patch bob's `emit_prune` function so we can
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# check if it is called in `handle_graft`
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event_emit_prune = asyncio.Event()
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async def emit_prune(topic, sender_peer_id):
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event_emit_prune.set()
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monkeypatch.setattr(gossipsubs[index_bob], 'emit_prune', emit_prune)
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# Check that alice is bob's peer but not his mesh peer
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assert id_alice in gossipsubs[index_bob].peers_gossipsub
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assert topic not in gossipsubs[index_bob].mesh
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await gossipsubs[index_alice].emit_graft(topic, id_bob)
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# Check that `emit_prune` is called
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await asyncio.wait_for(
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event_emit_prune.wait(),
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timeout=1,
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loop=event_loop,
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)
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assert event_emit_prune.is_set()
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# Check that bob is alice's peer but not her mesh peer
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assert topic in gossipsubs[index_alice].mesh
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assert id_bob not in gossipsubs[index_alice].mesh[topic]
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assert id_bob in gossipsubs[index_alice].peers_gossipsub
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await gossipsubs[index_bob].emit_graft(topic, id_alice)
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await asyncio.sleep(1)
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# Check that bob is now alice's mesh peer
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assert id_bob in gossipsubs[index_alice].mesh[topic]
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await cleanup()
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@pytest.mark.asyncio
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async def test_handle_prune():
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num_hosts = 2
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libp2p_hosts = await create_libp2p_hosts(num_hosts)
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# Create pubsub, gossipsub instances
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pubsubs, gossipsubs = create_pubsub_and_gossipsub_instances(libp2p_hosts, \
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SUPPORTED_PROTOCOLS, \
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10, 9, 11, 30, 3, 5, 3)
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index_alice = 0
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id_alice = str(libp2p_hosts[index_alice].get_id())
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index_bob = 1
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id_bob = str(libp2p_hosts[index_bob].get_id())
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topic = "test_handle_prune"
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for pubsub in pubsubs:
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await pubsub.subscribe(topic)
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await connect(libp2p_hosts[index_alice], libp2p_hosts[index_bob])
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# Wait 3 seconds for heartbeat to allow mesh to connect
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await asyncio.sleep(3)
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# Check that they are each other's mesh peer
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assert id_alice in gossipsubs[index_bob].mesh[topic]
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assert id_bob in gossipsubs[index_alice].mesh[topic]
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# alice emit prune message to bob, alice should be removed
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# from bob's mesh peer
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await gossipsubs[index_alice].emit_prune(topic, id_bob)
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# FIXME: This test currently works because the heartbeat interval
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# is increased to 3 seconds, so alice won't get add back into
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# bob's mesh peer during heartbeat.
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await asyncio.sleep(1)
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# Check that alice is no longer bob's mesh peer
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assert id_alice not in gossipsubs[index_bob].mesh[topic]
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assert id_bob in gossipsubs[index_alice].mesh[topic]
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await cleanup()
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@pytest.mark.asyncio
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async def test_dense():
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# Create libp2p hosts
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