code: def get_balance(cls, address):
          
  
          for api_call in cls.GET_BALANCE_MAIN:
              try:
                  return api_call(address)
              except cls.IGNORED_ERRORS:
                  pass
  
          raise ConnectionError('All APIs are unreachable.')
docs: Gets the balance of an address in satoshi.
  
          :param address: The address in question.
          :type address: ``str``
          :raises ConnectionError: If all API services fail.
          :rtype: ``int``