From 4e89b8fbacb4f63178d9b15085311f78afde7fbb Mon Sep 17 00:00:00 2001
From: catbref <misc-github@talk2dom.com>
Date: Mon, 21 Dec 2020 12:24:44 +0000
Subject: [PATCH] No need to create a map entry for null foreignBlockchain in
 TradeOffersWebSocket

---
 .../java/org/qortal/api/websocket/TradeOffersWebSocket.java  | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/main/java/org/qortal/api/websocket/TradeOffersWebSocket.java b/src/main/java/org/qortal/api/websocket/TradeOffersWebSocket.java
index f03b05ae..186f79e3 100644
--- a/src/main/java/org/qortal/api/websocket/TradeOffersWebSocket.java
+++ b/src/main/java/org/qortal/api/websocket/TradeOffersWebSocket.java
@@ -182,8 +182,9 @@ public class TradeOffersWebSocket extends ApiWebSocket implements Listener {
 			return;
 		}
 
-		// save session's preferred blockchain (if any)
-		sessionBlockchain.put(session, foreignBlockchain);
+		// Save session's preferred blockchain, if given
+		if (foreignBlockchain != null)
+			sessionBlockchain.put(session, foreignBlockchain);
 
 		List<CrossChainOfferSummary> crossChainOfferSummaries = new ArrayList<>();