Friendly Universal Identifier (FUID)

FUIDs are wrapped 128-bit unsigned integers, which gives them the same resolution as UUIDs. FUIDs are serialized to Base62, which is a sequence of digits and alphanumerics. This makes them shorter and easier to handle than normal UUID encoding, yet when generated randomly they use a UUID generation algorithm and are therefore isomorphic with UUIDs. One advantage of using FUIDs is that they can be converted from and to short strings that can stand in as human-readable identifiers for testing purposes, but can be full-length random numbers for production purposes.

lib.rs:

Generate and parse Friendly Universal Identifiers (FUIDs)

Here is an example of a FUID:

6fTiplVKIi6bJFe8rTXPcu

FUIDs are wrapped 128-bit unsigned integers, which gives them the same resolution as UUIDs. FUIDs are serialized to Base62, which is a sequence of digits and letters. This makes them shorter and easier to handle than normal UUID encoding, yet when generated randomly they use a UUID generation algorithm and are therefore isomorphic with UUIDs. One advantage of using FUIDs is that they can be converted from and to short strings that can stand in as human-readable identifiers for testing purposes, but can be full-length random numbers for production purposes.

Getting Started

Add the following to your Cargo.toml:

[dependencies.fuid]
version = "1.2.2"
features = ["serde"]        # Optional: Enable Serde support

no_std Support

fuid supports no_std environments. In the no_std environment, the alloc crate will be used.

[dependencies.fuid]
version = "1.2.2"
default-features = false    # Disable default features
features = ["serde"]        # Optional: Enable Serde support with no_std

Usage

When you want a random FUID, you can generate one:

use fuid::Fuid;

for _ in 0..10 {
    let id = Fuid::new();
    println!("{}", id);
}

Example output:

2OgGZdF0XpQ7nuoC99CDxX
4YX6PmtlWBkhMEyyc6G7Oz
7ZxST7AIFUpG9EgnD9CgI7
4XCFe4KvZjQBfb4sH6Ybqd
5tmyQuvYZyJ6vOWCQLEqkB
3RcWxQsqs8mWIpn1RQIVJc
7MlBR5pJakurAhNRr4LwfZ
6WKpT00vD4BJ3vZpEdZaZw
4SxascPNNmBN1jFQYCtWpr
3k9FL4LZe71geQdbOyCvz3

You can convert short strings to and from FUIDs. FUID-compatible strings may include numerals and upper and lower case English letters.

use fuid::Fuid;

let s = "A";
let id = Fuid::from_str(s).unwrap(); // Not all strings are valid FUIDs.
let s2: String = id.into();
assert_eq!(s2, s);
let id2: Fuid = s.try_into().unwrap();
let s3: String = id2.into();
assert_eq!(s3, s);

You can convert unsigned integers to and from FUIDs.

use fuid::Fuid;

let n: u128 = 10;
let id: Fuid = n.into();
let n2: u128 = id.into();
assert_eq!(n, n2);

You can use the fuid! macro to easily convert literals into FUIDs.

use fuid::fuid;

let a = fuid!("A");
assert_eq!(String::from(a), "A");

let b = fuid!(1);
assert_eq!(b.as_u128(), 1);

You can convert UUIDs to and from FUIDs.

use fuid::Fuid;
use uuid::Uuid;

let f = "3k9FL4LZe71geQdbOyCvz3";
let u = "7b06fb9f-cb59-4c6d-a38c-028d27193acd";
let fuid = Fuid::from_str(f).unwrap();
let uuid = Uuid::from_str(u).unwrap();
assert_eq!(fuid, uuid.into());
assert_eq!(uuid, fuid.into());