Noise: complete handshake process

TODO
- Figure out why `state.rs` is erased at some moment(even handshake
is not done).
- Refactor
- Add tests

tests/security/noise/test_noise.py

@@ -1,6 +1,7 @@
 import pytest
 
-from libp2p.tools.factories import noise_conn_factory
+from libp2p.security.noise.messages import NoiseHandshakePayload
+from libp2p.tools.factories import noise_conn_factory, noise_handshake_payload_factory
 
 DATA = b"testing_123"
 
@@ -18,3 +19,10 @@ async def test_noise_connection(nursery):
         await local_conn.write(DATA)
         read_data = await remote_conn.read(len(DATA))
         assert read_data == DATA
+
+
+def test_noise_handshake_payload():
+    payload = noise_handshake_payload_factory()
+    payload_serialized = payload.serialize()
+    payload_deserialized = NoiseHandshakePayload.deserialize(payload_serialized)
+    assert payload == payload_deserialized