old_contents: import enum
  from collections import namedtuple
  
  
  class GameOptions:
      PredefinedOptions = namedtuple('PredefinedOptions', ['app_id', 'context_id'])
  
      STEAM = PredefinedOptions('753', '6')
      DOTA2 = PredefinedOptions('570', '2')
      CS = PredefinedOptions('730', '2')
      TF2 = PredefinedOptions('440', '2')
      PUBG = PredefinedOptions('578080', '2')
  
      def __init__(self, app_id: str, context_id: str) -> None:
          self.app_id = app_id
          self.context_id = context_id
  
  
  class Asset:
      def __init__(self, asset_id: str, game: GameOptions, amount: int = 1) -> None:
          self.asset_id = asset_id
          self.game = game
          self.amount = amount
  
      def to_dict(self):
          return {
              'appid': int(self.game.app_id),
              'contextid': self.game.context_id,
              'amount': self.amount,
              'assetid': self.asset_id
          }
  
  
  class Currency(enum.IntEnum):
      USD = 1
      GBP = 2
      EURO = 3
      CHF = 4
  
  
  class TradeOfferState(enum.IntEnum):
      Invalid = 1
      Active = 2
      Accepted = 3
      Countered = 4
      Expired = 5
      Canceled = 6
      Declined = 7
      InvalidItems = 8
      ConfirmationNeed = 9
      CanceledBySecondaryFactor = 10
      StateInEscrow = 11
  
  
  class SteamUrl:
      API_URL = "https://api.steampowered.com"
      COMMUNITY_URL = "https://steamcommunity.com"
      STORE_URL = 'https://store.steampowered.com'
  
  
  class Endpoints:
      CHAT_LOGIN = SteamUrl.API_URL + "/ISteamWebUserPresenceOAuth/Logon/v1"
      SEND_MESSAGE = SteamUrl.API_URL + "/ISteamWebUserPresenceOAuth/Message/v1"
      CHAT_LOGOUT = SteamUrl.API_URL + "/ISteamWebUserPresenceOAuth/Logoff/v1"
      CHAT_POLL = SteamUrl.API_URL + "/ISteamWebUserPresenceOAuth/Poll/v1"
  
new_contents: import enum
  from collections import namedtuple
  
  
  class GameOptions:
      PredefinedOptions = namedtuple('PredefinedOptions', ['app_id', 'context_id'])
  
      STEAM = PredefinedOptions('753', '6')
      DOTA2 = PredefinedOptions('570', '2')
      CS = PredefinedOptions('730', '2')
      TF2 = PredefinedOptions('440', '2')
      PUBG = PredefinedOptions('578080', '2')
  
      def __init__(self, app_id: str, context_id: str) -> None:
          self.app_id = app_id
          self.context_id = context_id
  
  
  class Asset:
      def __init__(self, asset_id: str, game: GameOptions, amount: int = 1) -> None:
          self.asset_id = asset_id
          self.game = game
          self.amount = amount
  
      def to_dict(self):
          return {
              'appid': int(self.game.app_id),
              'contextid': self.game.context_id,
              'amount': self.amount,
              'assetid': self.asset_id
          }
  
  
  class Currency(enum.IntEnum):
      USD = 1
      GBP = 2
      EURO = 3
      CHF = 4
      RUB = 5
  
  
  class TradeOfferState(enum.IntEnum):
      Invalid = 1
      Active = 2
      Accepted = 3
      Countered = 4
      Expired = 5
      Canceled = 6
      Declined = 7
      InvalidItems = 8
      ConfirmationNeed = 9
      CanceledBySecondaryFactor = 10
      StateInEscrow = 11
  
  
  class SteamUrl:
      API_URL = "https://api.steampowered.com"
      COMMUNITY_URL = "https://steamcommunity.com"
      STORE_URL = 'https://store.steampowered.com'
  
  
  class Endpoints:
      CHAT_LOGIN = SteamUrl.API_URL + "/ISteamWebUserPresenceOAuth/Logon/v1"
      SEND_MESSAGE = SteamUrl.API_URL + "/ISteamWebUserPresenceOAuth/Message/v1"
      CHAT_LOGOUT = SteamUrl.API_URL + "/ISteamWebUserPresenceOAuth/Logoff/v1"
      CHAT_POLL = SteamUrl.API_URL + "/ISteamWebUserPresenceOAuth/Poll/v1"
  
subject: Update models.py