func byteStringToBytes(s *string) []byte {

    *s = (*s)[1:len(*s) - 1]

    split := strings.Split(*s, ",")

    res := make([]byte, len(split))

    for i, el := range split {
    r , _ := strconv.Atoi(el)
    res[i] = byte(r)
    }

    return res
}