- 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.
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