fix(virtual-clock): start when create exchange, fallback APIs

src/index.ts

@@ -1,6 +1,7 @@
 import { Binance } from './exchanges/binance/binance.exchange';
 import { Bybit } from './exchanges/bybit/bybit.exchange';
 import type { ExchangeOptions } from './types';
+import { virtualClock } from './utils/virtual-clock';
 
 const exchanges = {
   bybit: Bybit,
@@ -11,6 +12,10 @@ export const createExchange = (
   exchangeName: keyof typeof exchanges,
   options: ExchangeOptions
 ) => {
+  // start the virtual clock to contact exchanges
+  // with a server timestamp
+  virtualClock.start();
+
   const Exchange = exchanges[exchangeName];
   return new Exchange(options);
 };

src/utils/virtual-clock.ts

@@ -6,13 +6,19 @@ import utc from 'dayjs/plugin/utc';
 dayjs.extend(utc);
 
 class VirtualClock {
+  started = false;
+
   private server: Dayjs | null = null;
   private client: Dayjs | null = null;
 
-  constructor() {
-    this.fetchServerTime();
-    setInterval(() => this.fetchServerTime(), 60_000);
-  }
+  start = async () => {
+    if (!this.started) {
+      this.started = true;
+
+      await this.fetchServerTime();
+      setInterval(() => this.fetchServerTime(), 60_000);
+    }
+  };
 
   getCurrentTime = () => {
     if (this.server && this.client) {
@@ -25,12 +31,39 @@ class VirtualClock {
   };
 
   private fetchServerTime = async () => {
-    const { data } = await axios.get(
-      'https://worldtimeapi.org/api/timezone/etc/utc'
-    );
+    if (typeof window === 'undefined') {
+      // assume we are running onto a server
+      // this should have a better time sync
+      this.server = dayjs.utc();
+      this.client = dayjs.utc();
 
-    this.server = dayjs.utc(data.utc_datetime);
-    this.client = dayjs.utc();
+      return;
+    }
+
+    try {
+      const { data } = await axios.get(
+        'https://worldtimeapi.org/api/timezone/etc/utc',
+        { timeout: 5000 }
+      );
+
+      this.server = dayjs.utc(data.utc_datetime);
+      this.client = dayjs.utc();
+    } catch {
+      // fallback to tuleep.trade server time
+      // we don't really want to use this API as its not meant for this
+      try {
+        const {
+          data: { time },
+        } = await axios.get('https://tuleep.trade/api/time');
+
+        this.server = dayjs.utc(time);
+        this.client = dayjs.utc();
+      } catch {
+        // fallback to local time if all else fails
+        this.server = dayjs.utc();
+        this.client = dayjs.utc();
+      }
+    }
   };
 }