With all our SDKs, every peer connected to our servers with the JoinRoom function has a userData property that can be used to store arbitrary data. This can be anything, from a binary stream, to JSON, whatever makes sense to you.

Our servers make sure, that the data is kept in sync of all clients. Whenever the data changes, all clients get notified automatically. A dating app, storing the current GPS location of a user and syncing it in real-time with their mate so they can meet easily on crowded places.

The SDKs automatically optimize bandwidth usage by only sending and processing changed bytes. Just update the users data as often as you like and use the update function to update them on the servers. The callback PeerUserDataChanged gets the whole user data. There is no requirement on your side to process that data.

import { OdinClient } from '@4players/odin';
import { TokenGenerator } from "@4players/odin-tokens";

// Prepare the token to connect
const generator = new TokenGenerator(apiKey);
const token = generator.createToken("My Room", "John Doe");
const odinRoom = await OdinClient.initRoom(token);

// Handle events for new peers joining the room
odinRoom.addEventListener('PeerUserDataChanged', (event) => {
    console.log(`Peer data updated ${event.payload.peer.data}`);
});

// Connect the room
await odinRoom.join();

// Send a message to other clients
const data = {
    location: {
        longitude: CurrentLocation.longitude,
        latitude: CurrentLocation.latitude
    },
    name: User.name
};
const encoder = new TextEncoder();
odinRoom.ownPeer.data = encoder.encode(JSON.stringify(data));
await odinRoom.ownPeer.update();