'Returns a dictionary containing a complete set of required LTI
parameters.'

def get_valid_request_params(self):

    return {'lis_result_sourcedid': 'sourcedid', 'lis_outcome_service_url': 'http://example.com/service_url', 'oauth_consumer_key': 'consumer_key', 'tool_consumer_instance_guid': 'tool_instance_guid', 'usage_key': self.usage_key, 'course_key': self.course_key}
