How to save memory data to JSON about buntdb HOT 1 CLOSED

func saveJSON(db *buntdb.DB) []byte {
	keys := make(map[string]string)
	db.View(func(tx *buntdb.Tx) error {
		tx.Ascend("", func(key, val string) bool {
			keys[key] = val
			return true
		})
		return nil
	});
	data, _ := json.Marshal(keys)
	return data
}

func loadJSON(db *buntdb.DB, data []byte) {
	var keys map[string]string
	json.Unmarshal(data, &keys)
	db.Update(func(tx *buntdb.Tx) error {
		for key, val := range keys {
			tx.Set(key, val, nil)
		}
		return nil
	});
}