feat: Implement marketplace and purchases services

- Added MarketplaceService for searching usernames, numbers, and gifts.
- Introduced PurchasesService for purchasing stars and premium subscriptions.
- Created WalletService for wallet operations including balance checks and top-ups.
- Developed transaction handling for TON and USDT transfers.
- Added models for payments, marketplace results, and wallet information.
- Implemented error handling for various operations including wallet and transaction errors.
- Established domain structure for purchases, marketplace, and wallet functionalities.

examples/auctions/search_gifts.py

@@ -10,9 +10,10 @@ Use next_offset for pagination.
 import asyncio
 import json
 
-from pyfragment import FragmentClient, GiftsResult
 from pyfragment.utils import get_cookies_from_browser  # noqa: F401
 
+from pyfragment import FragmentClient, GiftsResult
+
 SEED = "word1 word2 ... word24"
 API_KEY = "YOUR_TONAPI_KEY"
 

examples/auctions/search_numbers.py

@@ -9,9 +9,10 @@ Use next_offset_id for pagination.
 import asyncio
 import json
 
-from pyfragment import FragmentClient, NumbersResult
 from pyfragment.utils import get_cookies_from_browser  # noqa: F401
 
+from pyfragment import FragmentClient, NumbersResult
+
 SEED = "word1 word2 ... word24"
 API_KEY = "YOUR_TONAPI_KEY"
 

examples/auctions/search_usernames.py

@@ -9,9 +9,10 @@ Use next_offset_id for pagination.
 import asyncio
 import json
 
-from pyfragment import FragmentClient, UsernamesResult
 from pyfragment.utils import get_cookies_from_browser  # noqa: F401
 
+from pyfragment import FragmentClient, UsernamesResult
+
 SEED = "word1 word2 ... word24"
 API_KEY = "YOUR_TONAPI_KEY"