Add option to use telegram test DC

example-config.yaml

@@ -241,6 +241,17 @@ telegram:
     api_hash: tjyd5yge35lbodk1xwzw2jstp90k55qz
     # (Optional) Create your own bot at https://t.me/BotFather
     bot_token: disabled
+    # Custom server to connect to.
+    server:
+        # Set to true to use these server settings. If false, will automatically
+        # use production server assigned by Telegram. Set to false in production.
+        enabled: false
+        # The DC ID to connect to.
+        dc: 2
+        # The IP to connect to.
+        ip: 149.154.167.40
+        # The port to connect to. 443 may not work, 80 is better and both are equally secure.
+        port: 80
     # Telethon proxy configuration.
     # You must install PySocks from pip for proxies to work.
     proxy:

mautrix_telegram/abstract_user.py

@@ -100,6 +100,10 @@ class AbstractUser(ABC):
         device = f"{platform.system()} {platform.release()}"
         sysversion = MautrixTelegramClient.__version__
         self.session = self.session_container.new_session(self.name)
+        if config["telegram.server.enabled"]:
+            self.session.set_dc(config["telegram.server.dc"],
+                                config["telegram.server.ip"],
+                                config["telegram.server.port"])
         self.client = MautrixTelegramClient(session=self.session,
                                             api_id=config["telegram.api_id"],
                                             api_hash=config["telegram.api_hash"],

mautrix_telegram/config.py

@@ -251,6 +251,10 @@ class Config(DictWithRecursion):
         copy("telegram.api_id")
         copy("telegram.api_hash")
         copy("telegram.bot_token")
+        copy("telegram.server.enabled")
+        copy("telegram.server.dc")
+        copy("telegram.server.ip")
+        copy("telegram.server.port")
         copy("telegram.proxy.type")
         copy("telegram.proxy.address")
         copy("telegram.proxy.port")