fix: Error with Decimal if the number was too large

functions/convert.py

@@ -1,14 +1,12 @@
-from utils.format_number import format_number
-
-import yaml
-
-import aiohttp
 import json
 import re
-
 from datetime import datetime
+from decimal import Decimal
 from http import HTTPStatus
-from decimal import Decimal, ROUND_DOWN
+
+import aiohttp
+import yaml
+
 from utils.format_number import format_number
 
 config = yaml.safe_load(open('config.yaml'))
@@ -24,8 +22,7 @@ class Converter:
         if not await self.kekkai():
             await self.ddg()
 
-        number = Decimal(str(self.conv_amount))
-        self.conv_amount = format_number(number.quantize(Decimal('1.0000'), rounding=ROUND_DOWN))
+        self.conv_amount = format_number(Decimal(self.conv_amount))
 
 
     async def kekkai(self) -> bool:

main.py

@@ -11,6 +11,7 @@ from aiogram import Bot, Dispatcher, Router, types
 from aiogram.client.default import DefaultBotProperties
 from aiogram.enums import ParseMode
 from aiogram.webhook.aiohttp_server import SimpleRequestHandler, setup_application
+from aiogram.filters import CommandStart
 
 import hashlib
 
@@ -19,6 +20,19 @@ bot = Bot(token=config['telegram_token'], default=DefaultBotProperties(parse_mod
 
 router = Router()
 
+@router.message(CommandStart())
+async def start(message: types.Message):
+    get_bot = await bot.get_me()
+    await message.reply(
+        'Shirino is a telegram bot for converting fiat or cryptocurrency. '
+        'The example of use occurs via inline query:\n'
+        f'`@{get_bot.username} USD RUB` \n'
+        f'`@{get_bot.username} 12 USD RUB` \n\n'
+        '[Source Code](https://github.com/Redume/Shirino)',
+        parse_mode='markdown'
+    )
+
+
 @router.inline_query()
 async def currency(query: types.InlineQuery) -> None:
     text = query.query.lower()
@@ -87,7 +101,7 @@ async def on_startup(bot: Bot) -> None:
     await bot.set_webhook(
         f"{config['webhook']['base_url']}{config['webhook']['path']}", 
         secret_token=config['webhook']['secret_token'],
-        allowed_updates=['inline_query']
+        allowed_updates=['inline_query', 'message']
         )
 
 

utils/format_number.py

@@ -6,7 +6,7 @@ def format_number(number):
     formatted_integer_part = '{:,.0f}'.format(number).replace(',', ' ')
 
     if '.' in str(number):
-        fractional_part = str(number).split('.')[1]
+        fractional_part = str(number).split('.')[1][:3]
         return formatted_integer_part + '.' + fractional_part
     else:
         return formatted_integer_part