From b0b11cf9c89b840bdd7a0145c0c756ce564c6c60 Mon Sep 17 00:00:00 2001
From: Tyler Bochard <zeruth09@gmail.com>
Date: Sun, 21 Apr 2019 21:51:25 -0400
Subject: [PATCH] ByteCodePatcher (#39)

Adds ErrorTransform
-This prevents the client from sending any stack traces to Jagex. (a huge client detection system they use)
---
 .../client/rs/bytecode/ByteCodePatcher.java   |  7 ++--
 .../bytecode/transformers/ErrorTransform.java | 36 +++++++++++++++++++
 2 files changed, 41 insertions(+), 2 deletions(-)
 create mode 100644 runelite-client/src/main/java/net/runelite/client/rs/bytecode/transformers/ErrorTransform.java

diff --git a/runelite-client/src/main/java/net/runelite/client/rs/bytecode/ByteCodePatcher.java b/runelite-client/src/main/java/net/runelite/client/rs/bytecode/ByteCodePatcher.java
index 1ab7c2da3e..abd4a970dc 100644
--- a/runelite-client/src/main/java/net/runelite/client/rs/bytecode/ByteCodePatcher.java
+++ b/runelite-client/src/main/java/net/runelite/client/rs/bytecode/ByteCodePatcher.java
@@ -9,6 +9,7 @@ import net.runelite.client.RuneLite;
 import net.runelite.client.rs.ClientLoader;
 import net.runelite.client.rs.bytecode.transformers.ActorTransform;
 import net.runelite.client.rs.bytecode.transformers.ClientTransform;
+import net.runelite.client.rs.bytecode.transformers.ErrorTransform;
 import net.runelite.client.rs.bytecode.transformers.PlayerTransform;
 import net.runelite.client.rs.bytecode.transformers.ProjectileTransform;
 import net.runelite.http.api.RuneLiteAPI;
@@ -50,11 +51,13 @@ public class ByteCodePatcher {
 				transformProjectile(projectileClass);
 				Class playerClass = Class.forName(hooks.playerClass, false, child);
 				transformPlayer(playerClass);
-
-				//experimental
 				Class clientClass = Class.forName("client", false, child);
 				transformBlackjack(clientClass);
 
+				//Odds and ends
+				ErrorTransform et = new ErrorTransform();
+				et.modify(null);
+
 				ByteCodeUtils.updateHijackedJar();
 			} catch (Exception e) {
 				e.printStackTrace();
diff --git a/runelite-client/src/main/java/net/runelite/client/rs/bytecode/transformers/ErrorTransform.java b/runelite-client/src/main/java/net/runelite/client/rs/bytecode/transformers/ErrorTransform.java
new file mode 100644
index 0000000000..0799613feb
--- /dev/null
+++ b/runelite-client/src/main/java/net/runelite/client/rs/bytecode/transformers/ErrorTransform.java
@@ -0,0 +1,36 @@
+package net.runelite.client.rs.bytecode.transformers;
+
+import javassist.CtClass;
+import javassist.CtMethod;
+import javassist.CtNewMethod;
+import net.runelite.client.rs.bytecode.ByteCodePatcher;
+
+//This prevents the client from sending stack traces to Jagex at all, even classes outside of runelite.
+public class ErrorTransform implements Transform {
+    public CtClass ct = null;
+
+    //Where Runelites error interceptor is located, not auto-scraped.
+    private final String ERROR_INSTANCE_CLASS = "dp";
+    private final String ERROR_INSTANCE_METHOD = "a";
+
+    @Override
+    public void modify(Class clazz) {
+        try {
+            System.out.println("[RuneLit] Transforming error method at class: "+ERROR_INSTANCE_CLASS);
+            ct = ByteCodePatcher.classPool.get(ERROR_INSTANCE_CLASS);
+            CtMethod error = ct.getDeclaredMethod(ERROR_INSTANCE_METHOD);
+            ct.removeMethod(error);
+            error = CtMethod.make("public static void a(String string, Throwable throwable, byte by) {"+
+                    "                   return;"+
+                    "                   }", ct);
+            ct.addMethod(error);
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Override
+    public void transform() {
+
+    }
+}