From 443236d1b1f27f8558b97844cca11ab65ad0b9e0 Mon Sep 17 00:00:00 2001
From: makarid <makarid@gmail.com>
Date: Tue, 9 Mar 2021 18:22:40 +0200
Subject: [PATCH] Fixing fail assert.

---
 .../src/main/java/org/knowm/xchange/ftx/service/FtxDigest.java  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xchange-ftx/src/main/java/org/knowm/xchange/ftx/service/FtxDigest.java b/xchange-ftx/src/main/java/org/knowm/xchange/ftx/service/FtxDigest.java
index 563920a0eaf..865cc73db99 100644
--- a/xchange-ftx/src/main/java/org/knowm/xchange/ftx/service/FtxDigest.java
+++ b/xchange-ftx/src/main/java/org/knowm/xchange/ftx/service/FtxDigest.java
@@ -30,7 +30,7 @@ public String digestParams(RestInvocation restInvocation) {
             + restInvocation.getHttpMethod().toUpperCase()
             + restInvocation.getPath();
 
-    if(restInvocation.getQueryString() != null){
+    if(!restInvocation.getQueryString().isEmpty()){
       message += "?"+restInvocation.getQueryString();
     }