text: #!usr/bin/python
  """
      Merchandise shop API views.
  """
  
  from typing import NoReturn
  from flask import Flask
  
  # TODO: Catalog API.
  # TODO: Categories API.
  
  
  def register(app: Flask) -> NoReturn:
      """
      Registers all views blueprints.
      :param: app Flask application.
      :return:
      """
      from . import cart
      from . import favorites
      from . import auth
      from . import balance
      from . import order
      auth.register(app)
      cart.register(app)
      favorites.register(app)
      balance.register(app)
      order.register(app)