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

159 lines
5.6 KiB
HTML

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta content="width=device-width, initial-scale=1.0" name="viewport" />
<title>JS-Waku light node example</title>
<link rel="apple-touch-icon" href="./favicon.png" />
<link rel="manifest" href="./manifest.json" />
<link rel="icon" href="./favicon.ico" />
</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="" />
<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 src="https://unpkg.com/@multiformats/multiaddr@12.1.1/dist/index.min.js"></script>
<script type="module">
import {
createLightNode,
waitForRemotePeer,
createEncoder,
createDecoder,
utf8ToBytes,
bytesToUtf8,
} from "https://unpkg.com/@waku/sdk@0.0.16/bundle/index.js";
import {
enrTree,
DnsNodeDiscovery,
} from "https://unpkg.com/@waku/dns-discovery@0.0.14/bundle/index.js";
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";
const decoder = createDecoder(ContentTopic);
const encoder = createEncoder({ contentTopic: ContentTopic });
let messages = [];
let unsubscribe;
const updateMessages = (msgs, div) => {
div.innerHTML = "<ul>";
messages.forEach((msg) => (div.innerHTML += "<li>" + msg + "</li>"));
div.innerHTML += "</ul>";
};
try {
await searchForPeer(statusDiv, remoteMultiAddrDiv);
} catch (e) {
console.log("Failed to find a peer", e);
remoteMultiAddrDiv.value =
"/dns4/node-01.ac-cn-hongkong-c.wakuv2.test.statusim.net/tcp/8000/wss/p2p/16Uiu2HAkvWiyFsgRhuJEb9JfjYxEkoHLgnUQmr1N5mKWnYjxYRVm";
}
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;
if (!ma) {
statusDiv.innerHTML = "<p>Error: No multiaddr provided.</p>";
return;
}
statusDiv.innerHTML = "<p>Dialing peer.</p>";
const multiaddr = MultiformatsMultiaddr.multiaddr(ma);
await node.dial(multiaddr, ["filter", "lightpush"]);
await waitForRemotePeer(node, ["filter", "lightpush"]);
const peers = await node.libp2p.peerStore.all();
statusDiv.innerHTML = "<p>Peer dialed.</p>";
remotePeerIdDiv.innerHTML = "<p>" + peers[0].id.toString() + "</p>";
textInput.disabled = false;
sendButton.disabled = false;
subscribeButton.disabled = false;
};
const callback = (wakuMessage) => {
const text = bytesToUtf8(wakuMessage.payload);
const timestamp = wakuMessage.timestamp.toString();
messages.push(text + " - " + timestamp);
updateMessages(messages, messagesDiv);
};
subscribeButton.onclick = async () => {
unsubscribe = await node.filter.subscribe([decoder], callback);
unsubscribeButton.disabled = false;
subscribeButton.disabled = true;
};
unsubscribeButton.onclick = async () => {
await unsubscribe();
unsubscribe = undefined;
unsubscribeButton.disabled = true;
subscribeButton.disabled = false;
};
sendButton.onclick = async () => {
const text = textInput.value;
await node.lightPush.send(encoder, {
payload: utf8ToBytes(text),
});
console.log("Message sent!");
textInput.value = null;
};
async function searchForPeer(statusNode, multiaddrNode) {
statusDiv.innerHTML = "<p>Discovering peer</p>";
const dnsDiscovery = await DnsNodeDiscovery.dnsOverHttp();
const peersIterator = await dnsDiscovery.getNextPeer(
[enrTree["TEST"]],
{ lightPush: 1, filter: 1 }
);
const peerEnr = await peersIterator.next();
const ma = peerEnr.value.multiaddrs.map((v) => v.toString())[1];
const peerId = peerEnr.value.peerId.toString();
multiaddrNode.value = `${ma}/p2p/${peerId}`;
}
</script>
</body>
</html>