uuid.go

package utils

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

func UUID() string {
	var id [16]byte
	_, err := io.ReadFull(rand.Reader, id[:])
	if err != nil {
		panic(err)
	}
	id[6] &= 0x0F // clear version
	id[6] |= 0x40 // set version to 4 (random uuid)
	id[8] &= 0x3F // clear variant
	id[8] |= 0x80 // set to IETF variant
	return hex.EncodeToString(id[:])
}