Gun-rs

Pure Rust implementation of Gun.js. For a wasm version, check out gun-rs-wasm.

Deployed at https://gun-rs.iris.to (serves iris-messenger at the root)

Live stats: https://gun-rs.iris.to/stats

Why?

• Rust can be compiled into high-performing native binaries on many platforms, including embedded systems.
• Maintaining and contributing to the codebase is easier than in Gun.js. Gun.js doesn't have compilation or minification steps, and the code is kind of manually minified 😄

Use

Install Rust first.

Gun relay

cargo install gundb
gundb start

Gun library

use gundb::{Node, NodeConfig};
use gundb::types::GunValue;
let mut db = Node::new_with_config(NodeConfig {
    outgoing_websocket_peers: vec!["wss://some-server-to-sync.with/gun".to_string()],
    ..NodeConfig::default()
});
let mut sub = db.get("greeting").on();
db.get("greeting").put("Hello World!".into());
if let GunValue::Text(str) = sub.recv().await.unwrap() {
    assert_eq!(&str, "Hello World!");
}

Status

3/12/2021:

• Gun basic API
• CLI for running the server
• Incoming websockets
• Outgoing websockets (env PEERS=wss://some-server-url.herokuapp.com/gun)
• Multicast (Iris messages seem not to propagate — size limit?)
• In-memory storage
• TLS support (env CERT_PATH and KEY_PATH)
• Advanced deduplication of sync messages
• Publish & subscribe
• Disk storage
• SEA (verification of signed data)

Issues

• When multiple adapters are enabled, it sometimes gets stuck
• User-space nodes (js: gun.user().get('something')) are relayed, but not properly retrieved and sent from memory (wrong format somehow)
• Multicast doesn't relay large messages like Iris posts

Develop

cargo install cargo-watch
RUST_LOG=debug cargo watch -x 'run -- start'

Run on Heroku

heroku create --buildpack emk/rust
git push heroku master

or: