text: from gryphon.lib.exchange.coinbase_btc_usd import CoinbaseBTCUSDExchange
  from gryphon.lib.logger import get_logger
  from gryphon.lib.money import Money
  
  logger = get_logger(__name__)
  
  
  class CoinbaseBTCCADExchange(CoinbaseBTCUSDExchange):
      def __init__(self, session=None, use_cached_orderbook=False):
          super(CoinbaseBTCCADExchange, self).__init__(session)
          self.name = u'COINBASE_BTC_CAD'
          self.friendly_name = u'Coinbase BTC-CAD'
          self.base_url = 'https://api.exchange.coinbase.com'
          self.currency = 'CAD'
          self.use_cached_orderbook = use_cached_orderbook
          self.product_id = 'BTC-CAD'
  
      def load_creds(self):
          try:
              self.api_key
              self.secret
              self.passphrase
          except AttributeError:
              self.api_key = self.load_env('COINBASE_BTC_CAD_API_KEY')
              self.passphrase = self.load_env('COINBASE_BTC_CAD_API_PASSPHRASE')
              self.secret = self.load_env('COINBASE_BTC_CAD_API_SECRET')
  
      def load_wallet_creds(self):
          try:
              self.wallet_api_key
              self.wallet_api_secret
              self.wallet_id
          except AttributeError:
              self.wallet_api_key = self.load_env('COINBASE_BTC_CAD_WALLET_API_KEY')
              self.wallet_api_secret = self.load_env('COINBASE_BTC_CAD_WALLET_API_SECRET')
              self.wallet_id = self.load_env('COINBASE_BTC_CAD_WALLET_ID')
  
      def load_fiat_account_id(self):
          return self.load_env('COINBASE_BTC_CAD_FIAT_ACCOUNT_ID')
  
      def fiat_deposit_fee(self, deposit_amount):
          return Money('1', 'CAD')
  