package main import (     "encoding/base64"     "fmt" ) const (     base64Table = "123QRSTUabcdVWXYZHijKLAWDCABDstEFGuvwxyzGHIJklmnopqr234560178912" ) var coder = base64.NewEncoding(base64Table) func base64Encode(src []byte) []byte {     return []byte(coder.EncodeToString(src)) } func base64Decode(src []byte) ([]byte, error) {     return coder.DecodeString(string(src)) } func main() {     // encode      hello := "hello world"     debyte := base64Encode([]byte(hello))     // decode      enbyte, err := base64Decode(debyte)     if err != nil {         fmt.Println(err.Error())     }     if hello != string(enbyte) {         fmt.Println("hello is not equal to enbyte")     }     fmt.Println(string(enbyte)) }