From 1228f147423d14a6e0b0c940259aa59da90797b1 Mon Sep 17 00:00:00 2001
From: Shane Freeder <theboyetronic@gmail.com>
Date: Fri, 3 May 2024 19:20:12 +0100
Subject: [PATCH] Hotfix cancelling unsigned 1.20.6 commands

---
 .../protocol/packet/chat/session/SessionCommandHandler.java     | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/chat/session/SessionCommandHandler.java b/proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/chat/session/SessionCommandHandler.java
index 5048294c..6984970b 100644
--- a/proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/chat/session/SessionCommandHandler.java
+++ b/proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/chat/session/SessionCommandHandler.java
@@ -55,7 +55,7 @@ public class SessionCommandHandler implements CommandHandler<SessionPlayerComman
                   + "Contact your network administrator."));
         }
         // We seemingly can't actually do this if signed args exist, if not, we can probs keep stuff happy
-        if (player.getProtocolVersion().noLessThan(ProtocolVersion.MINECRAFT_1_19_3)) {
+        if (player.getProtocolVersion().noLessThan(ProtocolVersion.MINECRAFT_1_19_3) && packet.lastSeenMessages != null) {
           return CompletableFuture.completedFuture(new ChatAcknowledgementPacket(packet.lastSeenMessages.getOffset()));
         }
         return CompletableFuture.completedFuture(null);