Validatable Unique Identifier

valid is a library for generating random ID, with the default configuration as follows

• 5 bytes timestamp
• 14 bytes of random bytes
• 1 byte checksum

Features:

• Cryptographically secure (use of crypto/rand)
• Lexicographically sortable
• Allows validation of ID
• Word safe and URL safe characters
• Embedded time with millisecond precision

In addition, most of the features can be changed by configuration.

Name	Secure Random Bit Size	String ID Size	Sortable	Checksum
google/uuid	122 bits	36 chars	no	no
oklog/ulid	80 bits (user defined source)	26 chars	yes	no
rs/xid	n/a (not cryptographically secure)	20 chars	yes	no
valid (default)	112 bits	32 chars	yes	yes
valid (configurable)	any	depends on config	yes / no	yes / no

Install

go get github.com/juntaki/valid

Usage

id := valid.Generate()

fmt.Println(id, len(id), valid.IsValid(id), valid.Timestamp(id))
// Output: 2X9P75FX2pJqCcHRVWV2862JW6XhFr6x 32 true 2021-09-08 23:59:17.339250688 +0900 JST