From 53c8e0923fe2fc2d0048f004c89a452057c01a8b Mon Sep 17 00:00:00 2001
From: Matthias <xmatthias@outlook.com>
Date: Sat, 24 Sep 2022 16:10:42 +0200
Subject: [PATCH] Improve typing in message_consumer

---
 freqtrade/rpc/external_message_consumer.py | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

diff --git a/freqtrade/rpc/external_message_consumer.py b/freqtrade/rpc/external_message_consumer.py
index 99ba39f76..bf71c24ea 100644
--- a/freqtrade/rpc/external_message_consumer.py
+++ b/freqtrade/rpc/external_message_consumer.py
@@ -8,7 +8,7 @@ import asyncio
 import logging
 import socket
 from threading import Thread
-from typing import TYPE_CHECKING, Any, Callable, Dict, List
+from typing import TYPE_CHECKING, Any, Callable, Dict, List, TypedDict
 
 import websockets
 from pydantic import ValidationError
@@ -29,6 +29,13 @@ if TYPE_CHECKING:
     import websockets.exceptions
 
 
+class Producer(TypedDict):
+    name: str
+    host: str
+    port: int
+    ws_token: str
+
+
 logger = logging.getLogger(__name__)
 
 
@@ -55,7 +62,7 @@ class ExternalMessageConsumer:
         self._emc_config = self._config.get('external_message_consumer', {})
 
         self.enabled = self._emc_config.get('enabled', False)
-        self.producers = self._emc_config.get('producers', [])
+        self.producers: List[Producer] = self._emc_config.get('producers', [])
 
         self.wait_timeout = self._emc_config.get('wait_timeout', 300)  # in seconds
         self.ping_timeout = self._emc_config.get('ping_timeout', 10)  # in seconds
@@ -162,7 +169,7 @@ class ExternalMessageConsumer:
             # Stop the loop once we are done
             self._loop.stop()
 
-    async def _handle_producer_connection(self, producer: Dict[str, Any], lock: asyncio.Lock):
+    async def _handle_producer_connection(self, producer: Producer, lock: asyncio.Lock):
         """
         Main connection loop for the consumer
 
@@ -175,7 +182,7 @@ class ExternalMessageConsumer:
             # Exit silently
             pass
 
-    async def _create_connection(self, producer: Dict[str, Any], lock: asyncio.Lock):
+    async def _create_connection(self, producer: Producer, lock: asyncio.Lock):
         """
         Actually creates and handles the websocket connection, pinging on timeout
         and handling connection errors.
@@ -236,7 +243,7 @@ class ExternalMessageConsumer:
     async def _receive_messages(
         self,
         channel: WebSocketChannel,
-        producer: Dict[str, Any],
+        producer: Producer,
         lock: asyncio.Lock
     ):
         """
@@ -277,7 +284,7 @@ class ExternalMessageConsumer:
 
                     break
 
-    def handle_producer_message(self, producer: Dict[str, Any], message: Dict[str, Any]):
+    def handle_producer_message(self, producer: Producer, message: Dict[str, Any]):
         """
         Handles external messages from a Producer
         """