From d4077ddc1ad2b89d8ef5269749c74c2baef2ff00 Mon Sep 17 00:00:00 2001
From: Shane Freeder <theboyetronic@gmail.com>
Date: Tue, 2 Apr 2024 13:53:22 +0100
Subject: [PATCH] only send extended resource pack states on supported versions

---
 .../backend/BackendPlaySessionHandler.java          | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/proxy/src/main/java/com/velocitypowered/proxy/connection/backend/BackendPlaySessionHandler.java b/proxy/src/main/java/com/velocitypowered/proxy/connection/backend/BackendPlaySessionHandler.java
index 051a7cbcf..44a3839bc 100644
--- a/proxy/src/main/java/com/velocitypowered/proxy/connection/backend/BackendPlaySessionHandler.java
+++ b/proxy/src/main/java/com/velocitypowered/proxy/connection/backend/BackendPlaySessionHandler.java
@@ -28,6 +28,7 @@ import com.velocitypowered.api.event.connection.PluginMessageEvent;
 import com.velocitypowered.api.event.player.PlayerResourcePackStatusEvent;
 import com.velocitypowered.api.event.player.ServerResourcePackSendEvent;
 import com.velocitypowered.api.event.proxy.ProxyPingEvent;
+import com.velocitypowered.api.network.ProtocolVersion;
 import com.velocitypowered.api.proxy.messages.ChannelIdentifier;
 import com.velocitypowered.api.proxy.player.ResourcePackInfo;
 import com.velocitypowered.proxy.VelocityServer;
@@ -209,10 +210,14 @@ public class BackendPlaySessionHandler implements MinecraftSessionHandler {
           if (serverConn.getConnection() != null) {
             serverConn.getConnection().write(new ResourcePackResponsePacket(
                     packet.getId(), packet.getHash(), PlayerResourcePackStatusEvent.Status.ACCEPTED));
-            serverConn.getConnection().write(new ResourcePackResponsePacket(
-                packet.getId(), packet.getHash(), PlayerResourcePackStatusEvent.Status.DOWNLOADED));
-            serverConn.getConnection().write(new ResourcePackResponsePacket(
-                packet.getId(), packet.getHash(), PlayerResourcePackStatusEvent.Status.SUCCESSFUL));
+            if (serverConn.getConnection().getProtocolVersion().noLessThan(ProtocolVersion.MINECRAFT_1_20_3)) {
+              serverConn.getConnection().write(new ResourcePackResponsePacket(
+                  packet.getId(), packet.getHash(),
+                  PlayerResourcePackStatusEvent.Status.DOWNLOADED));
+              serverConn.getConnection().write(new ResourcePackResponsePacket(
+                  packet.getId(), packet.getHash(),
+                  PlayerResourcePackStatusEvent.Status.SUCCESSFUL));
+            }
           }
           if (modifiedPack) {
             logger.warn("A plugin has tried to modify a ResourcePack provided by the backend server "