package hexutils import ( "encoding/hex" "fmt" "log" "regexp" ) func HexToBytes(s string) []byte { s = regexp.MustCompile(" ").ReplaceAllString(s, "") b := make([]byte, hex.DecodedLen(len(s))) _, err := hex.Decode(b, []byte(s)) if err != nil { log.Fatal(err) } return b[:] } func BytesToHexWithSpaces(b []byte) string { return fmt.Sprintf("% X", b) } func BytesToHex(b []byte) string { return fmt.Sprintf("%X", b) }