add proxy support

bot.py

@@ -19,6 +19,8 @@ from aiogram.types import (
     PreCheckoutQuery,
 )
 from aiogram.utils.keyboard import InlineKeyboardBuilder
+from aiogram.client.default import DefaultBotProperties
+from aiogram.client.session.aiohttp import AiohttpSession
 
 logging.basicConfig(level=logging.INFO)
 logger = logging.getLogger(__name__)
@@ -38,6 +40,7 @@ class Settings:
     marzban_username: str
     marzban_password: str
     admin_ids: set[int]
+    proxy: str
     db_path: str = "stats.db"
 
     @classmethod
@@ -54,6 +57,7 @@ class Settings:
             marzban_username=os.environ["MARZBAN_USERNAME"],
             marzban_password=os.environ["MARZBAN_PASSWORD"],
             admin_ids=admin_ids,
+            proxy=os.getenv("HTTP_PROXY", None),
             db_path=os.getenv("DB_PATH", "stats.db"),
         )
 
@@ -149,7 +153,10 @@ def bytes_to_gb(value: int | float) -> str:
 class VpnBot:
     def __init__(self, settings: Settings):
         self.settings = settings
-        self.bot = Bot(settings.bot_token, parse_mode=ParseMode.HTML)
+        self.session = AiohttpSession(proxy=settings.proxy)
+        self.bot = Bot(settings.bot_token, 
+                       default=DefaultBotProperties(parse_mode=ParseMode.HTML),
+                       session=self.session)
         self.dp = Dispatcher()
         self.marzban = MarzbanClient(
             settings.marzban_url,