Simplee |> Euklid

Rust crate for the CRDTs.

Dot

The Dot is implementing a marked version.

extern crate euklid;
use euklid::Dot;

// Create a dot for actor Alice.
let mut dot = Dot::new("Alice".to_string(), 0);
// Increment the dot.
dot.apply_inc();

More examples can be found in the example file.

Vector Clock

The VClock is implementing a vector clock.

extern crate euklid;
use euklid::{Dot, VClock};

// Create a vclock and increment the counter for user A.
let mut a = VClock::new();

// Increment the counter for actor A
a.apply(a.inc_op("A"));

// Increment the counter for actor B
a.apply(a.inc_op("B"));

More examples can be found in the example file.

G-Counter

The GCounter is implementing a grow-only counter.

xtern crate euklid;
use euklid::{Dot, GCounter};

// Create a vclock and increment the counter for user A.
let mut a = VGounter::new();

// Increment the counter for actor A
a.apply(a.inc_op("A"));

// Increment the counter for actor B
a.apply(a.inc_op("B"));

// Increase the counter for actor A by 5
a.apply(a.step_op("A", 5));

More examples can be found in the example file.

Resources

• A Comprehensive Study of Convergent and Commutative Replicated Data Types
• John Mumm - A CRDT Primer: Defanging Order Theory
• Conflict Free Replicated Data Types on Wiki
• rust-crdt
• Rust code coverage
• Github workflows for Rust

Thank you!!!

You can contact me at veminovici@hotmail.com. Code designed and written in Päädu, on the beautiful island of Saaremaa, Estonia.