mirror of https://github.com/waku-org/js-waku.git
164 lines
5.9 KiB
HTML
164 lines
5.9 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 Chat</title>
|
||
|
|
</head>
|
||
|
|
|
||
|
|
<body>
|
||
|
|
|
||
|
|
<div><h1>Waku Node Status</h1></div>
|
||
|
|
<div id='status'></div>
|
||
|
|
|
||
|
|
<input id='textInput' placeholder='Type your message here' type='text'>
|
||
|
|
<button id='sendButton' onclick='sendMessage();' type='button'>Send Message
|
||
|
|
</button>
|
||
|
|
|
||
|
|
<div><h1>Messages</h1></div>
|
||
|
|
<div id='messages'></div>
|
||
|
|
|
||
|
|
|
||
|
|
<script
|
||
|
|
src='https://unpkg.com/js-waku@latest/build/umd/js-waku.min.bundle.js'></script>
|
||
|
|
<script>
|
||
|
|
/**
|
||
|
|
* Demonstrate usage of js-waku in the browser. Use relay, gossip sub protocol to send and receive messages.
|
||
|
|
* Recommended payload is protobuf. Using simple utf-8 string for demo purposes only.
|
||
|
|
*
|
||
|
|
* - API documentation: https://js-waku.wakuconnect.dev/
|
||
|
|
* - Guides: https://docs.wakuconnect.dev/
|
||
|
|
*
|
||
|
|
* Note: open this HTML in two different browsers to experience decentralized communication.
|
||
|
|
* A node will not show its own messages, this can be changed by modifying the `Waku.create` call:
|
||
|
|
*
|
||
|
|
* Waku.create({
|
||
|
|
* bootstrap: {default: true}, libp2p: {
|
||
|
|
* config: {
|
||
|
|
* pubsub: {
|
||
|
|
* enabled: true,
|
||
|
|
* emitSelf: true,
|
||
|
|
* },
|
||
|
|
* },
|
||
|
|
* },
|
||
|
|
* })
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
const { Waku, WakuMessage } = jswaku;
|
||
|
|
const statusDiv = document.getElementById('status');
|
||
|
|
const messagesDiv = document.getElementById('messages');
|
||
|
|
const textInput = document.getElementById('textInput');
|
||
|
|
const sendButton = document.getElementById('sendButton');
|
||
|
|
|
||
|
|
// Keep it disabled until Waku node is ready
|
||
|
|
textInput.disabled = true;
|
||
|
|
sendButton.disabled = true;
|
||
|
|
|
||
|
|
// Every Waku Message has a content topic that categorizes it.
|
||
|
|
// It is always encoded in clear text.
|
||
|
|
// Recommendation: `/dapp-name/version/functionality/codec`
|
||
|
|
// We recommend to use protobuf as codec (`proto`), this demo uses utf-8
|
||
|
|
// for simplicity's sake.
|
||
|
|
const contentTopic = '/relay-demo/1/message/utf-8';
|
||
|
|
|
||
|
|
// Function to be used to send the text input over Waku.
|
||
|
|
let sendMessage = () => {
|
||
|
|
};
|
||
|
|
|
||
|
|
try {
|
||
|
|
statusDiv.innerHTML = '<p>Starting</p>';
|
||
|
|
|
||
|
|
// Create and starts a Waku node.
|
||
|
|
// `default: true` bootstraps by connecting to pre-defined/hardcoded Waku nodes.
|
||
|
|
// We are currently working on migrating this method to DNS Discovery.
|
||
|
|
//
|
||
|
|
// https://js-waku.wakuconnect.dev/classes/waku.Waku.html#create
|
||
|
|
Waku.create({ bootstrap: { default: true } }).catch(e => {
|
||
|
|
statusDiv.innerHTML = 'Error';
|
||
|
|
console.log('Issue starting Waku node', e);
|
||
|
|
}
|
||
|
|
).then(wakuNode => {
|
||
|
|
|
||
|
|
// Had a hook to process all incoming messages on a specified content topic.
|
||
|
|
//
|
||
|
|
// https://js-waku.wakuconnect.dev/classes/waku_relay.WakuRelay.html#addObserver
|
||
|
|
wakuNode.relay.addObserver((wakuMessage) => {
|
||
|
|
|
||
|
|
// Checks there is a payload on the message.
|
||
|
|
// Waku Message is encoded in protobuf, in proto v3 fields are always optional.
|
||
|
|
//
|
||
|
|
// https://js-waku.wakuconnect.dev/classes/waku_message.WakuMessage.html#payload
|
||
|
|
if (!wakuMessage.payload)
|
||
|
|
return;
|
||
|
|
|
||
|
|
// Helper method to decode the payload to utf-8. A production dApp should
|
||
|
|
// use `wakuMessage.payload` (U8intArray) which enables encoding a data
|
||
|
|
// structure of their choice.
|
||
|
|
//
|
||
|
|
// https://js-waku.wakuconnect.dev/classes/waku_message.WakuMessage.html#payloadAsUtf8
|
||
|
|
const text = wakuMessage.payloadAsUtf8;
|
||
|
|
messagesDiv.innerHTML = `<p>${text}</p><br />` + messagesDiv.innerHTML;
|
||
|
|
}, [contentTopic]);
|
||
|
|
|
||
|
|
statusDiv.innerHTML = '<p>Connecting to a peer</p>';
|
||
|
|
|
||
|
|
// Best effort method that waits for the Waku node to be connected to remote
|
||
|
|
// waku nodes (peers) and for appropriate handshakes to be done.
|
||
|
|
//
|
||
|
|
// https://js-waku.wakuconnect.dev/classes/waku.Waku.html#waitForRemotePeer
|
||
|
|
wakuNode.waitForRemotePeer()
|
||
|
|
.catch((e) => {
|
||
|
|
statusDiv.innerHTML = 'Failed to connect to peers: ' + e.toString();
|
||
|
|
})
|
||
|
|
.then(() => {
|
||
|
|
|
||
|
|
// We are now connected to a remote peer, let's define the `sendMessage`
|
||
|
|
// function that sends the text input over Waku Relay, the gossipsub
|
||
|
|
// protocol.
|
||
|
|
sendMessage = () => {
|
||
|
|
const text = textInput.value;
|
||
|
|
// Reset the text input.
|
||
|
|
textInput.value = null;
|
||
|
|
|
||
|
|
// Helper functions are available to create a Waku Message.
|
||
|
|
// These functions also provide native symmetric, asymmetric encryption,
|
||
|
|
// signing and signature verification. Check the `Options` object for details:
|
||
|
|
// https://js-waku.wakuconnect.dev/interfaces/waku_message.Options.html
|
||
|
|
//
|
||
|
|
// `WakuMessage.fromBytes` should be preferred for a production dApp to
|
||
|
|
// serialize a data structure.
|
||
|
|
//
|
||
|
|
// https://js-waku.wakuconnect.dev/classes/waku_message.WakuMessage.html#fromUtf8String
|
||
|
|
WakuMessage.fromUtf8String(text, contentTopic).catch(e => console.log('Error encoding message', e)).then(
|
||
|
|
wakuMessage => {
|
||
|
|
// Once the message is constructed, send it over Waku Relay.
|
||
|
|
//
|
||
|
|
// https://js-waku.wakuconnect.dev/classes/waku_relay.WakuRelay.html#send
|
||
|
|
wakuNode.relay.send(wakuMessage).catch((e) => {
|
||
|
|
console.log('Error sending message', e);
|
||
|
|
}).then(() => {
|
||
|
|
console.log('Message sent', text);
|
||
|
|
});
|
||
|
|
}
|
||
|
|
);
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
// Ready to send & receive messages, enable text input.
|
||
|
|
textInput.disabled = false;
|
||
|
|
sendButton.disabled = false;
|
||
|
|
statusDiv.innerHTML = '<p>Ready!</p>';
|
||
|
|
|
||
|
|
});
|
||
|
|
});
|
||
|
|
} catch (e) {
|
||
|
|
timestampDiv.innerHTML = 'Failed to start application';
|
||
|
|
console.log(e);
|
||
|
|
}
|
||
|
|
</script>
|
||
|
|
</body>
|
||
|
|
|
||
|
|
</html>
|