Function json_datastoreusage

lightningd/datastore.c:288–334

}

static struct command_result *json_datastoreusage(struct command *cmd,
						 const char *buffer,
						 const jsmntok_t *obj UNNEEDED,
						 const jsmntok_t *params)
{
	struct json_stream *response;
	const char **k, **key;
	struct db_stmt *stmt;
	const u8 *data;
	u64 gen, total_bytes = 0;

	if (!param(cmd, buffer, params,
		   p_opt("key", param_list_or_string, &key),
		   NULL))
		return command_param_failed();

	// We ignore an empty key string or key array.
	if (key && *key[0] == '\0')
		key = NULL;

	response = json_stream_success(cmd);
	json_object_start(response, "datastoreusage");
	json_add_string(response, "key", datastore_key_fmt(tmpctx, key));

	for (stmt = wallet_datastore_first(cmd, cmd->ld->wallet, key,
					   &k, &data, &gen);
	     stmt;
	     stmt = wallet_datastore_next(cmd, key, stmt,
	     				  &k, &data, &gen)) {

		u64 self_bytes = tal_bytelen(data);
		/* The key is stored as a binary blob where each string is separated by
		 * a '\0'. Therefore we add an additional `len(k) - 1`. k is the primary
		 * key of the table and can not be NULL */
		self_bytes += tal_count(k) - 1;
		for (size_t i = 0; i < tal_count(k); i++) {
			self_bytes += strlen(k[i]);
		};
		total_bytes += self_bytes;
	};
	tal_free(stmt);

	json_add_u64(response, "total_bytes", total_bytes);
	json_object_end(response);

	return command_success(cmd, response);
}

static const struct json_command datastore_command = {
	"datastore",