add typing to security

libp2p/security/simple_security.py

@@ -2,12 +2,21 @@ import asyncio
 from libp2p.security.secure_transport_interface import ISecureTransport
 from libp2p.security.secure_conn_interface import ISecureConn
 
+from typing import TYPE_CHECKING, cast
+
+if TYPE_CHECKING:
+    from libp2p.network.connection.raw_connection_interface import IRawConnection
+    from libp2p.peer.id import ID
+    from .typing import TSecurityDetails
+
 
 class SimpleSecurityTransport(ISecureTransport):
-    def __init__(self, key_phrase):
+    key_phrase: str
+
+    def __init__(self, key_phrase: str) -> None:
         self.key_phrase = key_phrase
 
-    async def secure_inbound(self, conn):
+    async def secure_inbound(self, conn: "IRawConnection") -> "ISecureConn":
         """
         Secure the connection, either locally or by communicating with opposing node via conn,
         for an inbound connection (i.e. we are not the initiator)
@@ -24,7 +33,9 @@ class SimpleSecurityTransport(ISecureTransport):
         secure_conn = SimpleSecureConn(conn, self.key_phrase)
         return secure_conn
 
-    async def secure_outbound(self, conn, peer_id):
+    async def secure_outbound(
+        self, conn: "IRawConnection", peer_id: "ID"
+    ) -> "ISecureConn":
         """
         Secure the connection, either locally or by communicating with opposing node via conn,
         for an inbound connection (i.e. we are the initiator)
@@ -47,18 +58,22 @@ class SimpleSecurityTransport(ISecureTransport):
 
 
 class SimpleSecureConn(ISecureConn):
-    def __init__(self, conn, key_phrase):
+    conn: "IRawConnection"
+    key_phrase: str
+    details: "TSecurityDetails"
+
+    def __init__(self, conn: "IRawConnection", key_phrase: str) -> None:
         self.conn = conn
-        self.details = {}
+        self.details = cast("TSecurityDetails", {})
         self.details["key_phrase"] = key_phrase
 
-    def get_conn(self):
+    def get_conn(self) -> "ISecureConn":
         """
         :return: connection object that has been made secure
         """
-        return self.conn
+        return cast("ISecureConn", self.conn)
 
-    def get_security_details(self):
+    def get_security_details(self) -> "TSecurityDetails":
         """
         :return: map containing details about the connections security
         """