js-waku

A JavaScript implementation of the Waku v2 protocol.

Usage

Install js-waku package:

npm install js-waku

Start a waku node:

import { Waku } from 'js-waku';

const waku = await Waku.create();

Connect to a new peer:

import { multiaddr } from 'multiaddr';
import PeerId from 'peer-id';

// Directly dial a new peer
await waku.dial('/dns4/node-01.do-ams3.wakuv2.test.statusim.net/tcp/443/wss/p2p/16Uiu2HAmPLe7Mzm8TsYUubgCAW1aJoeFScxrLj8ppHFivPo97bUZ');

// Or, add peer to address book so it auto dials in the background
waku.addPeerToAddressBook(
  '16Uiu2HAmPLe7Mzm8TsYUubgCAW1aJoeFScxrLj8ppHFivPo97bUZ',
  ['/dns4/node-01.do-ams3.wakuv2.test.statusim.net/tcp/443/wss']
);

The contentTopic is a metadata string that allows categorization of messages on the waku network. Depending on your use case, you can either create one (or several) new contentTopic(s) or look at the RFCs and use an existing contentTopic. See the Waku v2 Message spec for more details.

For example, if you were to use a new contentTopic such as "my-cool-app", here is how to listen to new messages received via Waku v2 Relay:

waku.relay.addObserver((msg) => {
  console.log("Message received:", msg.payloadAsUtf8)
}, ["my-cool-app"]);

Note that the guidelines regarding content topic format are yet to be defined, see vacp2p/rfc#364. The examples chat apps currently use content topic "dingpu".

Send a message on the waku relay network:

import { WakuMessage } from 'js-waku';

const msg = WakuMessage.fromUtf8String("Here is a message!", "my-cool-app")
await waku.relay.send(msg);

The Waku v2 Store protocol enables full nodes to store messages received via relay and clients to retrieve them (e.g. after resuming connectivity). The protocol implements pagination meaning that it may take several queries to retrieve all messages.

Query a waku store peer to check historical messages:

// Process messages once they are all retrieved:
const messages = await waku.store.queryHistory(storePeerId, ["my-cool-app"]);
messages.forEach((msg) => {
  console.log("Message retrieved:", msg.payloadAsUtf8)
})

// Or, pass a callback function to be executed as pages are received:
waku.store.queryHistory(storePeerId, ["my-cool-app"],
  (messages) => {
    messages.forEach((msg) => {
      console.log("Message retrieved:", msg.payloadAsUtf8)
    })
  });

Find more examples below or checkout the latest main branch documentation at https://status-im.github.io/js-waku/docs/.

Docs can also be generated locally using:

npm install
npm run doc

Waku Protocol Support

You can track progress on the project board.

• ✔: Supported
• 🚧: Implementation in progress
• ⛔: Support is not planned

Spec	Implementation Status
6/WAKU1	⛔
7/WAKU-DATA	⛔
8/WAKU-MAIL	⛔
9/WAKU-RPC	⛔
10/WAKU2	🚧
11/WAKU2-RELAY	✔
12/WAKU2-FILTER
13/WAKU2-STORE	✔ (querying node only)
14/WAKU2-MESSAGE	✔
15/WAKU2-BRIDGE
16/WAKU2-RPC	⛔
17/WAKU2-RLNRELAY
18/WAKU2-SWAP

Bugs, Questions & Features

If you encounter any bug or would like to propose new features, feel free to open an issue.

For support, questions & more general topics, please join the discussion on the Vac forum (use #js-waku tag).

Examples

Web Chat App (ReactJS)

A ReactJS chat app is provided as a showcase of the library used in the browser. A deployed version is available at https://status-im.github.io/js-waku/

Find the code in the examples folder.

To run a development version locally, do:

git clone https://github.com/status-im/js-waku/ ; cd js-waku
npm install   # Install dependencies for js-waku
npm run build # Build js-waku
cd examples/web-chat   
npm install   # Install dependencies for the web app
npm run start # Start development server to serve the web app on http://localhost:3000/js-waku

Use /help to see the available commands.

CLI Chat App (NodeJS)

A node chat app is provided as a working example of the library. It is interoperable with the nim-waku chat app example.

Find the code in the examples folder.

To run the chat app, first ensure you have Node.js v14 or above:

node --version

Then, install and run:

git clone https://github.com/status-im/js-waku/ ; cd js-waku
npm install   # Install dependencies for js-waku
npm run build # Build js-waku
cd examples/cli-chat
npm install # Install dependencies for the cli app
npm run start -- --autoDial

You can also specify an optional listenAddr parameter (.e.g --listenAddr /ip4/0.0.0.0/tcp/7777/ws). This is only useful if you want a remote node to dial to your chat app, it is not necessary in normal usage when you just connect to the fleet.

Contributing

See CONTRIBUTING.md.

License

Licensed and distributed under either of

• MIT license: LICENSE-MIT or http://opensource.org/licenses/MIT

or

• Apache License, Version 2.0, (LICENSE-APACHE-v2 or http://www.apache.org/licenses/LICENSE-2.0)

at your option. These files may not be copied, modified, or distributed except according to those terms.