UUID gen

uuid.go

package main

import (
	"crypto/rand"
	"encoding/hex"
	"fmt"
)

func newUUID() string {
	uuid := make([]byte, 16)
	n, err := rand.Read(uuid)
	if n != len(uuid) || err != nil {
		return "unknown"
	}

	uuid[8] = 0x80
	uuid[4] = 0x40

	return hex.EncodeToString(uuid)
}

func main() {
	fmt.Println(newUUID())
}