Migrate to new project structure.

libp2p/protocol_muxer/multiselect_communicator.py

@@ -0,0 +1,26 @@
+from .multiselect_communicator_interface import IMultiselectCommunicator
+
+
+class MultiselectCommunicator(IMultiselectCommunicator):
+    """
+    Communicator helper class that ensures both the client
+    and multistream module will follow the same multistream protocol,
+    which is necessary for them to work
+    """
+
+    def __init__(self, stream):
+        self.stream = stream
+
+    async def write(self, msg_str):
+        """
+        Write message to stream
+        :param msg_str: message to write
+        """
+        await self.stream.write(msg_str.encode())
+
+    async def read_stream_until_eof(self):
+        """
+        Reads message from stream until EOF
+        """
+        read_str = (await self.stream.read()).decode()
+        return read_str