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js-waku-examples
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js-waku-examples/examples/light-js/index.html

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<!DOCTYPE html>
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<html lang="en">
<head>
<meta charset="UTF-8" />
<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" />
<link rel="manifest" href="./manifest.json" />
<link rel="icon" href="./favicon.ico" />
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</head>
<body>
<div><h2>Status</h2></div>
<div id="status"></div>
<div><h2>Local Peer Id</h2></div>
<div id="peer-id"></div>
<div><h2>Remote Peer Id</h2></div>
<div id="remote-peer-id"></div>
<label for="remote-multiaddr">Remote peer's multiaddr</label>
<input
id="remote-multiaddr"
type="text"
value="/dns4/node-01.ac-cn-hongkong-c.wakuv2.test.statusim.net/tcp/443/wss/p2p/16Uiu2HAkvWiyFsgRhuJEb9JfjYxEkoHLgnUQmr1N5mKWnYjxYRVm"
/>
<button disabled id="dial" type="button">Dial</button>
<br />
<button disabled id="subscribe" type="button">Subscribe with Filter</button>
<button disabled id="unsubscribe" type="button">
Unsubscribe with Filter
</button>
<br />
<label for="textInput">Message text</label>
<input id="textInput" placeholder="Type your message here" type="text" />
<button disabled id="sendButton" type="button">
Send message using Light Push
</button>
<br />
<div id="messages"></div>
<script type="module">
import * as utils from "https://unpkg.com/@waku/byte-utils@0.0.2/bundle/index.js";
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import { createLightNode } from "https://unpkg.com/@waku/create@0.0.6/bundle/index.js";
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import {
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waitForRemotePeer,
createEncoder,
createDecoder,
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} from "https://unpkg.com/@waku/core@0.0.10/bundle/index.js";
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const peerIdDiv = document.getElementById("peer-id");
const remotePeerIdDiv = document.getElementById("remote-peer-id");
const statusDiv = document.getElementById("status");
const remoteMultiAddrDiv = document.getElementById("remote-multiaddr");
const dialButton = document.getElementById("dial");
const subscribeButton = document.getElementById("subscribe");
const unsubscribeButton = document.getElementById("unsubscribe");
const messagesDiv = document.getElementById("messages");
const textInput = document.getElementById("textInput");
const sendButton = document.getElementById("sendButton");
const ContentTopic = "/js-waku-examples/1/chat/utf8";
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const decoder = createDecoder(ContentTopic);
const encoder = createEncoder(ContentTopic);
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let messages = [];
let unsubscribe;
const updateMessages = (msgs, div) => {
div.innerHTML = "<ul>";
messages.forEach((msg) => (div.innerHTML += "<li>" + msg + "</li>"));
div.innerHTML += "</ul>";
};
statusDiv.innerHTML = "<p>Creating Waku node.</p>";
const node = await createLightNode();
statusDiv.innerHTML = "<p>Starting Waku node.</p>";
await node.start();
statusDiv.innerHTML = "<p>Waku node started.</p>";
peerIdDiv.innerHTML = "<p>" + node.libp2p.peerId.toString() + "</p>";
dialButton.disabled = false;
dialButton.onclick = async () => {
const ma = remoteMultiAddrDiv.value;
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if (!ma) {
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statusDiv.innerHTML = "<p>Error: No multiaddr provided.</p>";
return;
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}
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statusDiv.innerHTML = "<p>Dialing peer.</p>";
await node.dial(ma, ["filter", "lightpush"]);
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await waitForRemotePeer(node, ["filter", "lightpush"]);
const peers = await node.libp2p.peerStore.all();
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statusDiv.innerHTML = "<p>Peer dialed.</p>";
remotePeerIdDiv.innerHTML = "<p>" + peers[0].id.toString() + "</p>";
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textInput.disabled = false;
sendButton.disabled = false;
subscribeButton.disabled = false;
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};
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const callback = (wakuMessage) => {
const text = utils.bytesToUtf8(wakuMessage.payload);
const timestamp = wakuMessage.timestamp.toString();
messages.push(text + " - " + timestamp);
updateMessages(messages, messagesDiv);
};
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subscribeButton.onclick = async () => {
unsubscribe = await node.filter.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.lightPush.push(encoder, {
payload: utils.utf8ToBytes(text),
});
console.log("Message sent!");
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textInput.value = null;
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};
</script>
</body>
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</html>