1 // Copyright 2011 Google Inc. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 package uuid 6 7 import guuid "github.com/google/uuid" 8 9 // NewRandom returns a Random (Version 4) UUID or panics. 10 // 11 // The strength of the UUIDs is based on the strength of the crypto/rand 12 // package. 13 // 14 // A note about uniqueness derived from the UUID Wikipedia entry: 15 // 16 // Randomly generated UUIDs have 122 random bits. One's annual risk of being 17 // hit by a meteorite is estimated to be one chance in 17 billion, that 18 // means the probability is about 0.00000000006 (6 × 10−11), 19 // equivalent to the odds of creating a few tens of trillions of UUIDs in a 20 // year and having one duplicate. 21 func NewRandom() UUID { 22 if gu, err := guuid.NewRandom(); err == nil { 23 return UUID(gu[:]) 24 } 25 return nil 26 } 27