code: def get_backend_choices(currency=None):
      
      choices = []
      backends_names = getattr(settings, 'GETPAID_BACKENDS', [])
  
      for backend_name in backends_names:
          backend = import_module(backend_name)
          if currency:
              if currency in backend.PaymentProcessor.BACKEND_ACCEPTED_CURRENCY:
                  choices.append(
                      (backend_name, backend.PaymentProcessor.BACKEND_NAME)
                  )
          else:
              choices.append(
                  (backend_name, backend.PaymentProcessor.BACKEND_NAME)
              )
      return choices
docs: Get active backends modules. Backend list can be filtered by
      supporting given currency.