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add relay-rtc example
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Sasha
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examples/relay-rtc/README.md
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examples/relay-rtc/README.md
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# Using Waku Light Push and Filter in JavaScript
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**Demonstrates**:
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- Waku Light node: Waku Filter + Waku Light Push
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- Pure Javascript/HTML.
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- Use minified bundle of js from unpkg.com, no import, no package manager.
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This example uses Waku Filter to listen to messages and Waku Light Push to send messages.
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To test the example, simply download the `index.html` file from this folder and open it in a browser.
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The `master` branch's HEAD is deployed at https://examples.waku.org/light-js/.
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examples/relay-rtc/favicon.ico
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examples/relay-rtc/favicon.ico
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examples/relay-rtc/favicon.png
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examples/relay-rtc/favicon.png
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examples/relay-rtc/index.html
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examples/relay-rtc/index.html
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8" />
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<meta content="width=device-width, initial-scale=1.0" name="viewport" />
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<title>JS-Waku light node example</title>
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<link rel="apple-touch-icon" href="./favicon.png" />
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<link rel="manifest" href="./manifest.json" />
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<link rel="icon" href="./favicon.ico" />
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</head>
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<body>
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<div><h2>Status</h2></div>
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<div id="status"></div>
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<div><h2>Local Peer Id</h2></div>
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<div id="peer-id"></div>
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<div><h2>Remote Peer Id</h2></div>
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<div id="remote-peer-id"></div>
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<label for="remote-multiaddr">Remote peer's multiaddr</label>
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<input id="remote-multiaddr" type="text" value="" />
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<button disabled id="dial" type="button">Dial</button>
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<br />
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<button disabled id="subscribe" type="button">Subscribe with Filter</button>
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<button disabled id="unsubscribe" type="button">
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Unsubscribe with Filter
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</button>
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<br />
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<label for="textInput">Message text</label>
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<input id="textInput" placeholder="Type your message here" type="text" />
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<button disabled id="sendButton" type="button">
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Send message using Light Push
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</button>
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<br />
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<div id="messages"></div>
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<script src="https://unpkg.com/@multiformats/multiaddr@12.1.1/dist/index.min.js"></script>
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<script src="./index.js"></script>
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</body>
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</html>
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132
examples/relay-rtc/index.js
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examples/relay-rtc/index.js
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import {
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createRelayNode,
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waitForRemotePeer,
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createEncoder,
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createDecoder,
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utf8ToBytes,
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bytesToUtf8,
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} from "@waku/sdk";
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import { webSockets } from "@libp2p/websockets";
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import { all as filterAll } from "@libp2p/websockets/filters";
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import { webRTC } from "@libp2p/webrtc";
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import { circuitRelayTransport } from "libp2p/circuit-relay";
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const peerIdDiv = document.getElementById("peer-id");
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const remotePeerIdDiv = document.getElementById("remote-peer-id");
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const statusDiv = document.getElementById("status");
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const remoteMultiAddrDiv = document.getElementById("remote-multiaddr");
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const dialButton = document.getElementById("dial");
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const subscribeButton = document.getElementById("subscribe");
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const unsubscribeButton = document.getElementById("unsubscribe");
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const messagesDiv = document.getElementById("messages");
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const textInput = document.getElementById("textInput");
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const sendButton = document.getElementById("sendButton");
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const ContentTopic = "/js-waku-examples/1/chat/utf8";
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const decoder = createDecoder(ContentTopic);
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const encoder = createEncoder({ contentTopic: ContentTopic });
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let messages = [];
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let unsubscribe;
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const updateMessages = (msgs, div) => {
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div.innerHTML = "<ul>";
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messages.forEach((msg) => (div.innerHTML += "<li>" + msg + "</li>"));
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div.innerHTML += "</ul>";
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};
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statusDiv.innerHTML = "<p>Creating Waku node.</p>";
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const node = await createRelayNode({
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libp2p: {
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addresses: {
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listen: ["/webrtc"],
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},
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connectionGater: {
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denyDialMultiaddr: () => {
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// by default we refuse to dial local addresses from the browser since they
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// are usually sent by remote peers broadcasting undialable multiaddrs but
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// here we are explicitly connecting to a local node so do not deny dialing
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// any discovered address
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return false;
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},
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},
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transports: [
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webRTC({}),
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circuitRelayTransport({
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discoverRelays: 1,
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}),
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webSockets({ filter: filterAll }),
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],
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},
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});
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window.node = node;
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statusDiv.innerHTML = "<p>Starting Waku node.</p>";
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await node.start();
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statusDiv.innerHTML = "<p>Waku node started.</p>";
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peerIdDiv.innerHTML = "<p>" + node.libp2p.peerId.toString() + "</p>";
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dialButton.disabled = false;
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dialButton.onclick = async () => {
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const ma = remoteMultiAddrDiv.value;
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if (!ma) {
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statusDiv.innerHTML = "<p>Error: No multiaddr provided.</p>";
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return;
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}
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statusDiv.innerHTML = "<p>Dialing peer.</p>";
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const multiaddr = MultiformatsMultiaddr.multiaddr(ma);
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await node.dial(multiaddr, ["relay"]);
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await waitForRemotePeer(node, ["relay"]);
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const peers = await node.libp2p.peerStore.all();
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statusDiv.innerHTML = "<p>Peer dialed.</p>";
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remotePeerIdDiv.innerHTML = "<p>" + peers[0].id.toString() + "</p>";
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textInput.disabled = false;
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sendButton.disabled = false;
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subscribeButton.disabled = false;
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};
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const callback = (wakuMessage) => {
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const text = bytesToUtf8(wakuMessage.payload);
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const timestamp = wakuMessage.timestamp.toString();
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messages.push(text + " - " + timestamp);
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updateMessages(messages, messagesDiv);
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};
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subscribeButton.onclick = async () => {
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unsubscribe = await node.relay.subscribe([decoder], callback);
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unsubscribeButton.disabled = false;
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subscribeButton.disabled = true;
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};
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unsubscribeButton.onclick = async () => {
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await unsubscribe();
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unsubscribe = undefined;
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unsubscribeButton.disabled = true;
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subscribeButton.disabled = false;
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};
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sendButton.onclick = async () => {
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const text = textInput.value;
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await node.relay.send(encoder, {
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payload: utf8ToBytes(text),
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});
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console.log("Message sent!");
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textInput.value = null;
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};
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const GONODE = "16Uiu2HAmUdyH4P2UhgX3hTCbeeJHpxxfsn8EdyHkMnPyb54a92jZ";
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const root = `/ip4/192.168.0.101/tcp/60001/ws/p2p/${GONODE}`;
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remoteMultiAddrDiv.value = root;
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window.dial = (id) => node.dial(`${root}/p2p-circuit/webrtc/p2p/${id}`);
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window.drop = () =>
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Array.from(node.libp2p.components.connectionManager.connections.entries())
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.filter((c) => c[0].toString() === GONODE)
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.map((c) => console.log(c[1][0].close()));
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/*
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/ip4/127.0.0.1/tcp/60001/ws/p2p/16Uiu2HAm3s9fFHbcVrKQz2h5fMAsUzm3AeCUxg52e3SBFjt7q4Gg
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/ip4/127.0.0.1/tcp/60001/ws/p2p/16Uiu2HAm3s9fFHbcVrKQz2h5fMAsUzm3AeCUxg52e3SBFjt7q4Gg/p2p-circuit/p2p/12D3KooWMghpY8592CnQQTyg4fiSJcUuA7Pu8n8YzUPYaLjzH7Yo/p2p-circuit/webrtc/p2p/12D3KooWMghpY8592CnQQTyg4fiSJcUuA7Pu8n8YzUPYaLjzH7Yo
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*/
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examples/relay-rtc/manifest.json
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examples/relay-rtc/manifest.json
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{
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"name": "Light JS",
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"description": "Send messages between several users (or just one) using light client targeted protocols.",
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"icons": [
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{
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"src": "favicon.ico",
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"sizes": "64x64 32x32 24x24 16x16",
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"type": "image/x-icon"
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},
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{
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"src": "favicon.png",
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"type": "image/png",
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"sizes": "192x192"
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}
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],
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"display": "standalone",
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"theme_color": "#ffffff",
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"background_color": "#ffffff"
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}
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examples/relay-rtc/package-lock.json
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examples/relay-rtc/package-lock.json
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examples/relay-rtc/package.json
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examples/relay-rtc/package.json
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{
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"name": "light",
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"version": "1.0.0",
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"description": "**Demonstrates**:",
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"main": "index.js",
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"scripts": {
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"build": "webpack --config webpack.config.js",
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"start": "webpack-dev-server"
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},
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"keywords": [],
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"author": "",
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"license": "ISC",
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"dependencies": {
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"@libp2p/webrtc": "^2.0.11",
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"@libp2p/websockets": "^6.0.3",
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"@waku/dns-discovery": "^0.0.15",
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"@waku/sdk": "^0.0.17",
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"libp2p": "^0.45.9"
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},
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"devDependencies": {
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"copy-webpack-plugin": "^11.0.0",
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"webpack": "^5.74.0",
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"webpack-cli": "^4.10.0",
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"webpack-dev-server": "^4.11.1"
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}
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}
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examples/relay-rtc/webpack.config.js
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examples/relay-rtc/webpack.config.js
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const CopyWebpackPlugin = require("copy-webpack-plugin");
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const path = require("path");
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module.exports = {
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entry: "./index.js",
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output: {
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path: path.resolve(__dirname, "build"),
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filename: "index.js",
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},
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experiments: {
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asyncWebAssembly: true,
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},
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mode: "development",
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plugins: [
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new CopyWebpackPlugin({
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patterns: ["index.html", "favicon.ico", "favicon.png", "manifest.json"],
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}),
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],
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};
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