Add type hints to network folder

libp2p/network/stream/net_stream_interface.py

@@ -1,37 +1,41 @@
 from abc import ABC, abstractmethod
+from typing import (
+    Any,
+    Coroutine,
+)
 
 
 class INetStream(ABC):
 
     @abstractmethod
-    def get_protocol(self):
+    def get_protocol(self) -> str:
         """
         :return: protocol id that stream runs on
         """
 
     @abstractmethod
-    def set_protocol(self, protocol_id):
+    def set_protocol(self, protocol_id: str) -> bool:
         """
         :param protocol_id: protocol id that stream runs on
         :return: true if successful
         """
 
     @abstractmethod
-    def read(self):
+    def read(self) -> Coroutine[Any, Any, bytes]:
         """
         reads from the underlying muxed_stream
         :return: bytes of input
         """
 
     @abstractmethod
-    def write(self, _bytes):
+    def write(self, data: bytes) -> Coroutine[Any, Any, int]:
         """
         write to the underlying muxed_stream
         :return: number of bytes written
         """
 
     @abstractmethod
-    def close(self):
+    def close(self) -> Coroutine[Any, Any, bool]:
         """
         close the underlying muxed stream
         :return: true if successful