package util

import (
	"crypto/rand"
	"fmt"
)

// NewUUID generates a random UUIDv4 string.
func NewUUID() string {
	var b [16]byte
	rand.Read(b[:])             //nolint:errcheck
	b[6] = (b[6] & 0x0f) | 0x40 // version 4
	b[8] = (b[8] & 0x3f) | 0x80 // variant 10xx
	return fmt.Sprintf("%08x-%04x-%04x-%04x-%012x",
		b[0:4], b[4:6], b[6:8], b[8:10], b[10:16])
}