2024-01-08 23:01:53 +00:00
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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>
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<h2>Status</h2>
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</div>
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<div id="status"></div>
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<div>
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<h2>Local Peer Id</h2>
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</div>
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<div id="peer-id"></div>
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<div>
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<h2>Select Peer</h2>
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</div>
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<div>
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<button id="getPeersButton" type="button">Refresh Peers</button>
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<select id="peer-select">
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<option value=""></option>
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</select>
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</div>
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<div>
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<label for="remote-multiaddr">Remote peer's multiaddr</label>
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</div>
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<div style="margin-right: 1em">
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<input
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id="remote-multiaddr"
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type="text"
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value=""
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style="width: 100%; max-width: 900px"
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/>
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</div>
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<button disabled id="dial" type="button">Dial</button>
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<div>
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<h2>Remote Peers</h2>
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</div>
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<div id="remote-peer-id"></div>
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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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<div>
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<h2>Store</h2>
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</div>
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<button disabled id="queryStoreButton" type="button">
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Retrieve past messages
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</button>
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<script src="https://unpkg.com/@multiformats/multiaddr@12.1.1/dist/index.min.js"></script>
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<script type="module">
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import {
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createLightNode,
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createEncoder,
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createDecoder,
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utf8ToBytes,
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bytesToUtf8,
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2024-10-21 07:58:41 +00:00
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} from "https://unpkg.com/@waku/sdk@0.0.29/bundle/index.js";
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2024-01-08 23:01:53 +00:00
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import {
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enrTree,
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DnsNodeDiscovery,
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2024-04-23 21:55:53 +00:00
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wakuDnsDiscovery,
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2024-10-21 07:58:41 +00:00
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} from "https://unpkg.com/@waku/discovery@0.0.6/bundle/index.js";
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import { messageHash } from "https://unpkg.com/@waku/message-hash@0.1.17/bundle/index.js";
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2024-01-08 23:01:53 +00:00
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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 queryStoreButton = document.getElementById("queryStoreButton");
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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 getPeersButton = document.getElementById("getPeersButton");
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const peersSelector = document.getElementById("peer-select");
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const ContentTopic = "/js-waku-examples/1/chat/utf8";
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const decoder = createDecoder(ContentTopic);
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2024-04-23 21:55:53 +00:00
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const encoder = createEncoder({ contentTopic: ContentTopic});
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2024-01-08 23:01:53 +00:00
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// Each key is a unique identifier for the message. Each value is an obj { text, timestamp }
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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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Object.values(msgs)
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.sort((a, b) => a.timestamp.getTime() - b.timestamp.getTime())
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.forEach(
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(msg) =>
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(div.innerHTML +=
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"<li>" + `${msg.text} - ${msg.timestamp}` + "</li>")
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);
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div.innerHTML += "</ul>";
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};
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try {
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await getPeers();
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} catch (e) {
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console.log("Failed to find a peer", e);
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remoteMultiAddrDiv.value =
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2024-04-09 10:40:16 +00:00
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"/dns4/node-01.do-ams3.waku.test.statusim.net/tcp/8000/wss/p2p/16Uiu2HAkykgaECHswi3YKJ5dMLbq2kPVCo89fcyTd38UcQD6ej5W";
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2024-01-08 23:01:53 +00:00
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}
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statusDiv.innerHTML = "<p>Creating Waku node.</p>";
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2024-04-23 21:55:53 +00:00
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const node = await createLightNode({
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2024-10-21 07:58:41 +00:00
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networkConfig: {
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contentTopics: [ContentTopic],
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},
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defaultBootstrap: false,
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2024-04-23 21:55:53 +00:00
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});
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2024-01-08 23:01:53 +00:00
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statusDiv.innerHTML = "<p>Starting Waku node.</p>";
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await node.start();
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window.waku = node;
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console.info(
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"Use window.waku to access the waku node running in the browser directly through the console."
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);
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// Queries all peers from libp2p peer store and updates list of connected peers
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const updatePeersList = async () => {
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// Generate <p> element with connection string from each peer
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const peers = await node.libp2p.peerStore.all();
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const peerIdElements = peers.map((peer) => {
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const element = document.createElement("p");
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element.textContent = `${peer.addresses[1].multiaddr}/p2p/${peer.id}`;
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return element;
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});
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// Update elements displaying list of peers
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remotePeerIdDiv.replaceChildren(...peerIdElements);
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};
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// Refreshes list of connected peers each time a new one is detected
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node.store.protocol.addLibp2pEventListener("peer:connect", async (event) => {
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2024-01-08 23:01:53 +00:00
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const peerId = event.detail;
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console.log(`Peer connected with peer id: ${peerId}`);
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// Wait half a second after receiving event for peer to show up in peer store
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setTimeout(async () => {
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updatePeersList();
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}, 500);
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// Update status
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statusDiv.innerHTML = `<p>Peer dialed: ${peerId}</p>`;
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// Enable send and subscribe inputs as we are now connected to a peer
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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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queryStoreButton.disabled = false;
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});
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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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let multiaddr;
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try {
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multiaddr = MultiformatsMultiaddr.multiaddr(ma);
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} catch (err) {
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statusDiv.innerHTML = "<p>Error: invalid multiaddr provided</p>";
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throw err;
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}
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await node.dial(multiaddr, ["filter", "lightpush", "store"]);
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};
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const messageReceivedCallback = (wakuMessage) => {
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// create a unique key for the message
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const msgHash =
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bytesToUtf8(messageHash(ContentTopic, wakuMessage)) +
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wakuMessage.proto.timestamp;
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const text = bytesToUtf8(wakuMessage.payload);
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// store message by its key
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messages[msgHash + wakuMessage.proto.timestamp] = {
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text,
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timestamp: wakuMessage.timestamp,
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};
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// call function to refresh display of messages
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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.filter.subscribe(
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[decoder],
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messageReceivedCallback
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);
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unsubscribeButton.disabled = false;
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subscribeButton.disabled = true;
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};
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queryStoreButton.onclick = async () => {
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await node.store.queryWithOrderedCallback(
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[decoder],
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messageReceivedCallback
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);
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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.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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getPeersButton.onclick = async () => {
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await getPeers(statusDiv, remoteMultiAddrDiv);
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};
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peersSelector.addEventListener("change", function (event) {
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remoteMultiAddrDiv.value = event.target.value;
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});
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async function getPeers() {
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// Display status
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statusDiv.innerHTML = "<p>Discovering peers</p>";
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// Clear all options in select element
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peersSelector.innerHTML = "";
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// Get peers using DNS discovery
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const defaultNodeCount = 5;
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const dnsDiscovery = await DnsNodeDiscovery.dnsOverHttp();
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const peers = await dnsDiscovery.getPeers([enrTree["TEST"]], {
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relay: defaultNodeCount,
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store: defaultNodeCount,
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filter: defaultNodeCount,
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lightPush: defaultNodeCount,
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});
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// Create an option element for each peer's multiaddr and append to select element
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const optionElements = peers.map((peer) => {
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const optionElement = document.createElement("option");
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optionElement.value = `${peer.multiaddrs[1]}/p2p/${peer.peerId}`;
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optionElement.text = `${peer.multiaddrs[1]}/p2p/${peer.peerId}`;
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return optionElement;
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});
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peersSelector.append(...optionElements);
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// Set first peer as selected
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peersSelector.options[0].selected = true;
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remoteMultiAddrDiv.value = peersSelector.options[0].value;
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statusDiv.innerHTML = "<p>Peers discovered</p>";
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}
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</script>
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</body>
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</html>
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