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‎README.md‎

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# cuid-rust
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[![Build Status](https://github.com/mplanchard/cuid-rust/actions/workflows/ci.yml/badge.svg?branch=master)](https://github.com/mplanchard/cuid-rust/actions/workflows/ci.yml?query=branch%3Amaster)
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[![Crates.io](https://img.shields.io/crates/v/cuid2 "Crates.io")](https://crates.io/crates/cuid2/)
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[![docs.rs](https://docs.rs/cuid/badge.svg)](https://docs.rs/cuid2/)
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[![Crates.io](https://img.shields.io/crates/v/cuid "Crates.io")](https://crates.io/crates/cuid/)
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[![docs.rs](https://docs.rs/cuid/badge.svg)](https://docs.rs/cuid/)
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This repository is the home of the [cuid] and [cuid2] crates. The
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original CUID standard is marked as [deprecated](https://github.com/paralleldrive/cuid2#improvements-over-cuid)
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This repository is the home of the [cuid], [cuid1], and [cuid2]
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crates. The original CUID standard is marked as
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[deprecated](https://github.com/paralleldrive/cuid2#improvements-over-cuid)
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in favor of CUID2, but we intent to continue supporting v1 CUIDs
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indefinitely, since their k-sortability is only insecure in specific
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use-cases, while their sortability is quite useful in other
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use-cases. `cuid2` is provided as a separate crate because its
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generated IDs have different semantics from `cuid`, so it is not
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necessarily a drop-in replacement.
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use-cases.
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If you are using the `cuid` crate already, you can also use `cuid2()`
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and related functions from that crate.
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The `cuid` crate provides a wrapper around both versions:
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- https://github.com/mplanchard/cuid-rust/tree/master/crates/cuid
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In addition, both `cuid1` and `cuid2` may be used as standalone crates:
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- https://github.com/mplanchard/cuid-rust/tree/master/crates/cuid1
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- https://github.com/mplanchard/cuid-rust/tree/master/crates/cuid2
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Please see the individual crates' READMEs for more information.
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If you are upgrading to `cuid` 2.0, you must swap usages of non-version-specific
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calls like `cuid()` for the desired version, i.e. `cuid1()` or `cuid2()`.
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## Development
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A [`flake.nix`](https://nixos.wiki/wiki/Flakes) file is provided for easy
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direnv plugin).
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[cuid]: https://crates.io/crates/cuid/
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[cuid1]: https://crates.io/crates/cuid1/
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[cuid2]: https://crates.io/crates/cuid2/

‎crates/cuid/Cargo.toml‎

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[package]
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name = "cuid"
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version = "1.3.3"
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version = "2.0.0"
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description = "An ipmlementation of CUID protocol in rust"
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documentation = "https://docs.rs/cuid/latest/cuid/"
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resolver = "2"

‎crates/cuid/README.md‎

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# cuid-rust
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# cuid
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[![Build Status](https://github.com/mplanchard/cuid-rust/actions/workflows/ci.yml/badge.svg?branch=master)](https://github.com/mplanchard/cuid-rust/actions/workflows/ci.yml?query=branch%3Amaster)
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[![Crates.io](https://img.shields.io/crates/v/cuid "Crates.io")](https://crates.io/crates/cuid/)
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appropriately. Therefore, this library will continue to support v1
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CUIDs for the foreseeable future. See the original authors' position in more detail [here](https://github.com/paralleldrive/cuid2?tab=readme-ov-file#note-on-k-sortablesequentialmonotonically-increasing-ids).
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If you only need `cuid2`, you can use the `cuid2` crate: [cuid2 crate](https://docs.rs/cuid2/latest/cuid2/).
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By default, both `cuid1` and `cuid2` algorithms are provided. If you
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only need one, you can disable default features and select just the one
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you need, for example to only include v2 CUIDs:
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```toml
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cuid = { version = "2.0.0", default-features = false, features = ["v2"] }
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```
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You can also use the [cuid1] or [cuid2] crates independently.
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## Upgrading to version 2.0
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Functions like `cuid()` have been removed in favor of version-specific
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functions, like `cuid1()`. You can either update the function calls or
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replace your use of the cuid crate with the [cuid1] or [cuid2] crate.
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## Installation
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In cargo.toml
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```toml
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cuid = "1.4.0"
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cuid = "2.0.0"
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```
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Or install the binary:
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// the length, counter function, and fingerprinter (note that
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// these are const functions, so you can create a static
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// constructor if desired.
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let constructor = CuidConstructor::new()
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static CONSTRUCTOR: Cuid2Constructor = Cuid2Constructor::new()
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.with_length(20)
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.with_counter(const_counter)
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.with_fingerprinter(const_fingerprinter);
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println!("{}", constructor.create_id());
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}
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fn const_counter() -> u64 {
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const fn const_counter() -> u64 {
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}
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fn const_fingerprinter() -> String {
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const fn const_fingerprinter() -> String {
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"fingers".to_string()
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}
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```
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```
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[benches]: ./benches/cuid.rs
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[cuid1]: https://crates.io/crates/cuid1/
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[cuid2]: https://crates.io/crates/cuid2/

‎crates/cuid1/README.md‎

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# cuid1
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[![Build Status](https://github.com/mplanchard/cuid-rust/actions/workflows/ci.yml/badge.svg?branch=master)](https://github.com/mplanchard/cuid-rust/actions/workflows/ci.yml?query=branch%3Amaster)
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[![Crates.io](https://img.shields.io/crates/v/cuid "Crates.io")](https://crates.io/crates/cuid1/)
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[![docs.rs](https://docs.rs/cuid/badge.svg)](https://docs.rs/cuid1/)
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[![Crates.io](https://img.shields.io/crates/v/cuid1 "Crates.io")](https://crates.io/crates/cuid1/)
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[![docs.rs](https://docs.rs/cuid1/badge.svg)](https://docs.rs/cuid1/)
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Cuids are "Collision-resistant ids optimized for horizontal scaling and
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binary search lookup performance."
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- `cuid1` is a k-sortable ID that is extremely fast to generate with
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very good randomness properties
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Note that the [cuid] crate is also available, and provides access to
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both the `cuid1` and `cuid2` algorithms.
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**NOTE:** It is the position of the original authors of CUID that
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`cuid1` is "insecure" due to its being k-sortable and potentially
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exposing information about generation order and/or time of
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generation. It is my position that these properties apply to a number
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of very good ID-generating algorithms (such as UUIDv7), and it is
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therefore up to the users of this crate to choose an ID
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appropriately. Therefore, this library will continue to support v1
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CUIDs for the foreseeable future. See the original authors' position in more detail [here](https://github.com/paralleldrive/cuid2?tab=readme-ov-file#note-on-k-sortablesequentialmonotonically-increasing-ids).
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CUIDs for the foreseeable future. See the original authors' position
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in more detail [here](https://github.com/paralleldrive/cuid2?tab=readme-ov-file#note-on-k-sortablesequentialmonotonically-increasing-ids).
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If you only need `cuid2`, you can use the `cuid2` crate: [cuid2 crate](https://docs.rs/cuid2/latest/cuid2/).
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If you would like an algorithm that is not k-sortable, you can use the
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[`cuid2` crate](https://docs.rs/cuid2/latest/cuid2/).
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## Installation
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```
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[benches]: ./benches/cuid.rs
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[cuid]: https://crates.io/crates/cuid/
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[cuid1]: https://crates.io/crates/cuid1/
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[cuid2]: https://crates.io/crates/cuid2/

‎crates/cuid2/README.md‎

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# Cuid2
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# cuid2
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[![Build Status](https://github.com/mplanchard/cuid-rust/actions/workflows/ci.yml/badge.svg?branch=master)](https://github.com/mplanchard/cuid-rust/actions/workflows/ci.yml?query=branch%3Amaster)
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[![Crates.io](https://img.shields.io/crates/v/cuid2 "Crates.io")](https://crates.io/crates/cuid2/)
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[![docs.rs](https://docs.rs/cuid/badge.svg)](https://docs.rs/cuid2/)
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[![docs.rs](https://docs.rs/cuid2/badge.svg)](https://docs.rs/cuid2/)
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Secure, collision-resistant ids optimized for horizontal scaling and
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performance.
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reference implementation [here](https://github.com/paralleldrive/cuid2).
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Please see that repository for a discussion of the benefits of CUIDs, as
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well as for the improvements in CUID2 over the original CUID algorithm
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(which is also implemented in Rust [here](https://docs.rs/cuid/latest/cuid/)).
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well as for the changes in CUID2 relative to the original CUID algorithm.
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Both algorithms are available via the [cuid] crate, while the CUID1
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algorithm is available via the [cuid1] crate.
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## Usage
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> cuid2
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y3cfw1hafbtezzflns334sb2
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```
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[cuid]: https://crates.io/crates/cuid/
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[cuid1]: https://crates.io/crates/cuid1/
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[cuid2]: https://crates.io/crates/cuid2/

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