package utils

import (
	"crypto/rand"
	"fmt"
)

//NewV4 Returns a new uuid v4
func NewV4() string {
	u := [16]byte{}
	_, err := rand.Read(u[:16])
	if err != nil {
		panic(err)
	}

	u[8] = (u[8] | 0x80) & 0xBf
	u[6] = (u[6] | 0x40) & 0x4f

	return fmt.Sprintf("%x-%x-%x-%x-%x", u[:4], u[4:6], u[6:8], u[8:10], u[10:])
}