json.c

	/* Party subaddress */
	if (party->subaddress.valid
		&& ast_json_object_set(json_party_id, "subaddress", json_party_subaddress(&party->subaddress))) {
		return NULL;
	}

	return ast_json_ref(json_party_id);
}

enum ast_json_to_ast_vars_code ast_json_to_ast_variables(struct ast_json *json_variables, struct ast_variable **variables)
{
	struct ast_json_iter *it_json_var;

	*variables = NULL;

	for (it_json_var = ast_json_object_iter(json_variables); it_json_var;
		it_json_var = ast_json_object_iter_next(json_variables, it_json_var)) {
		struct ast_variable *new_var;
		const char *key = ast_json_object_iter_key(it_json_var);
		const char *value;
		struct ast_json *json_value;

		if (ast_strlen_zero(key)) {
			continue;
		}

		json_value = ast_json_object_iter_value(it_json_var);
		if (ast_json_typeof(json_value) != AST_JSON_STRING) {
			/* Error: Only strings allowed */
			ast_variables_destroy(*variables);
			*variables = NULL;
			return AST_JSON_TO_AST_VARS_CODE_INVALID_TYPE;
		}
		value = ast_json_string_get(json_value);
		/* Should never be NULL.  Otherwise, how could it be a string type? */
		ast_assert(value != NULL);
		if (!value) {
			/* To be safe. */
			continue;
		}
		new_var = ast_variable_new(key, value, "");
		if (!new_var) {
			/* Error: OOM */
			ast_variables_destroy(*variables);
			*variables = NULL;
			return AST_JSON_TO_AST_VARS_CODE_OOM;
		}

		ast_variable_list_append(variables, new_var);
	}

	return AST_JSON_TO_AST_VARS_CODE_SUCCESS;
}