*prettify + new example

example/wsClient.ts

@@ -0,0 +1,33 @@
+import WebSocket from 'ws';
+// const ws = new WebSocket('wss://master.dlob.drift.trade/ws');
+const ws = new WebSocket('ws://localhost:3000/ws');
+import { sleep } from '../src/utils/utils';
+
+ws.on('open', async () => {
+  console.log('Connected to the server');
+  ws.send(JSON.stringify({ type: 'subscribe', channel: 'SOL-PERP' }));
+  ws.send(JSON.stringify({ type: 'subscribe', channel: 'LINK-PERP' }));
+  ws.send(JSON.stringify({ type: 'subscribe', channel: 'INJ-PERP' }));
+  await sleep(5000);
+  
+  ws.send(JSON.stringify({ type: 'unsubscribe', channel: 'SOL-PERP' }));
+  console.log("####################");
+});
+
+ws.on('message', (data: WebSocket.Data) => {
+  try {
+    const message = JSON.parse(data.toString());
+    console.log(`Received data from market ${message.channel}`);
+    // book data is in message.data
+  } catch (e) {
+    console.error('Invalid message:', data);
+  }
+});
+
+ws.on('close', () => {
+  console.log('Disconnected from the server');
+});
+
+ws.on('error', (error: Error) => {
+  console.error('WebSocket error:', error);
+});