From 995cd6ed73d9200b1e7a3b2356089517b55ecfab Mon Sep 17 00:00:00 2001
From: Stefan Aebischer <aebischer@pixtron.ch>
Date: Wed, 15 Jan 2020 14:40:10 -0500
Subject: [PATCH] Avoid conccurent _syncTime calls

---
 lib/request.js | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/lib/request.js b/lib/request.js
index 7cfbfe3..7ad6527 100644
--- a/lib/request.js
+++ b/lib/request.js
@@ -15,6 +15,7 @@ module.exports = class Request {
   constructor(key, secret, livenet=false) {
     this.baseUrl = baseUrls[livenet === true ? 'livenet' : 'testnet'];
     this._timeOffset = null;
+    this._syncTimePromise = null;
 
     if(key) assert(secret, 'Secret is required for private enpoints');
 
@@ -105,6 +106,18 @@ module.exports = class Request {
   }
 
   async _syncTime() {
-    this._timeOffset = await this.getTimeOffset();
+    if(this._syncTimePromise !== null) return this._syncTimePromise;
+
+    this._syncTimePromise = new Promise(async (resolve, reject) => {
+      try {
+        this._timeOffset = await this.getTimeOffset();
+        this._syncTimePromise = null;
+        resolve();
+      } catch(err) {
+        reject(err);
+      }
+    });
+
+    return this._syncTimePromise;
   }
 }