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feat(example): migrate relay-js to esm

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Franck Royer 2022-07-27 13:18:32 +10:00 committed by fryorcraken.eth
parent e42b825672
commit cc73ac0908
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1 changed files with 63 additions and 97 deletions
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160
examples/relay-js/index.html
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@ -13,40 +13,25 @@
<div id='status'></div>
<input id='textInput' placeholder='Type your message here' type='text'>
<button id='sendButton' onclick='sendMessage();' type='button'>Send Message
<button id='sendButton' 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>
<script type='module'>
/**
* 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;
import {
createWaku,
waitForRemotePeer,
WakuMessage
} from '../../dist/bundle.js';
const statusDiv = document.getElementById('status');
const messagesDiv = document.getElementById('messages');
const textInput = document.getElementById('textInput');
@ -63,10 +48,6 @@
// 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>';
@ -75,86 +56,71 @@
// 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 => {
const waku = await createWaku({ bootstrap: { default: true } });
await waku.start();
// Had a hook to process all incoming messages on a specified content topic.
// Had a hook to process all incoming messages on a specified content topic.
//
// https://js-waku.wakuconnect.dev/classes/waku_relay.WakuRelay.html#addObserver
waku.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_relay.WakuRelay.html#addObserver
wakuNode.relay.addObserver((wakuMessage) => {
// https://js-waku.wakuconnect.dev/classes/waku_message.WakuMessage.html#payload
if (!wakuMessage.payload)
return;
// 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` (Uint8Array) 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>${text}</p><br />` + messagesDiv.innerHTML;
}, [contentTopic]);
statusDiv.innerHTML = '<p>Connecting to a peer</p>';
// Best effort method that waits for the Waku node to be connected to remote
// waku nodes (peers) and for appropriate handshakes to be done.
// Helper method to decode the payload to utf-8. A production dApp should
// use `wakuMessage.payload` (Uint8Array) which enables encoding a data
// structure of their choice.
//
// https://js-waku.wakuconnect.dev/classes/waku.Waku.html#waitForRemotePeer
wakuNode.waitForRemotePeer()
.catch((e) => {
statusDiv.innerHTML = 'Failed to connect to peers: ' + e.toString();
})
.then(() => {
// https://js-waku.wakuconnect.dev/classes/waku_message.WakuMessage.html#payloadAsUtf8
const text = wakuMessage.payloadAsUtf8;
messagesDiv.innerHTML = `<p>${text}</p><br />` + messagesDiv.innerHTML;
}, [contentTopic]);
// 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;
statusDiv.innerHTML = '<p>Connecting to a peer</p>';
// 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);
});
}
);
// 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
await waitForRemotePeer(waku);
};
// 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.
sendButton.onclick = async () => {
const text = textInput.value;
// Ready to send & receive messages, enable text input.
textInput.disabled = false;
sendButton.disabled = false;
statusDiv.innerHTML = '<p>Ready!</p>';
// 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
const wakuMessage = await WakuMessage.fromUtf8String(text, contentTopic);
// Once the message is constructed, send it over Waku Relay.
//
// https://js-waku.wakuconnect.dev/classes/waku_relay.WakuRelay.html#send
await waku.relay.send(wakuMessage);
console.log('Message sent!');
// Reset the text input.
textInput.value = null;
};
// 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';
statusDiv.innerHTML = 'Failed to start application';
console.log(e);
}
</script>