except KeyboardInterrupt:
        payment_system.logger.info("Shutting down...")
        loop = asyncio.get_event_loop()
        pending_tasks = [task for task in asyncio.all_tasks(loop) if task is not asyncio.current_task(loop)]
        for task in pending_tasks:
            task.cancel()
        loop.run_until_complete(asyncio.gather(*pending_tasks, return_exceptions=True))
        
        loop.run_until_complete(loop.shutdown_asyncgens())
        loop.close()