<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def get(self):
 """ this translates to 'get all token addresses we have channels open for' """

        return self.rest_api.get_tokens_list(
            self.rest_api.raiden_api.raiden.default_registry.address,
        )