From 3a7751910efe7e6ba01c8db2c5aaf937becfce0f Mon Sep 17 00:00:00 2001
From: catbref <misc-github@talk2dom.com>
Date: Mon, 29 Jun 2020 08:38:19 +0100
Subject: [PATCH] Fix /websockets/chat/messages so it disregards
 group-membership change notifications

---
 .../java/org/qortal/api/websocket/ChatMessagesWebSocket.java  | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/main/java/org/qortal/api/websocket/ChatMessagesWebSocket.java b/src/main/java/org/qortal/api/websocket/ChatMessagesWebSocket.java
index fa860441b..ef04b9504 100644
--- a/src/main/java/org/qortal/api/websocket/ChatMessagesWebSocket.java
+++ b/src/main/java/org/qortal/api/websocket/ChatMessagesWebSocket.java
@@ -94,6 +94,10 @@ public void onWebSocketMessage(Session session, String message) {
 	}
 
 	private void onNotify(Session session, ChatTransactionData chatTransactionData, int txGroupId) {
+		if (chatTransactionData == null)
+			// There has been a group-membership change, but we're not interested
+			return;
+
 		// We only want group-based messages with our txGroupId
 		if (chatTransactionData.getRecipient() != null || chatTransactionData.getTxGroupId() != txGroupId)
 			return;