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Fix MC-181190 curing zombie villager discount exploit (#4871)

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BillyGalbreath 2020-12-08 21:56:22 -06:00 committed by GitHub
parent 3dc82c2008
commit 5d216be1d7
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Spigot-Server-Patches/0613-Fix-curing-zombie-villager-discount-exploit.patch Normal file
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@ -0,0 +1,44 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: BillyGalbreath <blake.galbreath@gmail.com>
Date: Tue, 8 Dec 2020 20:14:20 -0600
Subject: [PATCH] Fix curing zombie villager discount exploit
This fixes the exploit used to gain absurd trading discounts with infecting
and curing a villager on repeat by simply resetting the reputation when it
is cured.
diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
index 5596d9f42523dbcbad47d21a4b2fdba39e3c5590..ae5ed3bd0b663092a4658b24cbd69d37b4e141cb 100644
--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
@@ -704,4 +704,9 @@ public class PaperWorldConfig {
private void fixClimbingBypassingCrammingRule() {
fixClimbingBypassingCrammingRule = getBoolean("fix-climbing-bypassing-cramming-rule", fixClimbingBypassingCrammingRule);
}
+
+ public boolean fixCuringZombieVillagerDiscountExploit = true;
+ private void fixCuringExploit() {
+ fixCuringZombieVillagerDiscountExploit = getBoolean("game-mechanics.fix-curing-zombie-villager-discount-exploit", fixCuringZombieVillagerDiscountExploit);
+ }
}
diff --git a/src/main/java/net/minecraft/server/EntityVillager.java b/src/main/java/net/minecraft/server/EntityVillager.java
index 0388d1099f2a6d436a5a5e58bbbdae3ddab969e7..9b35c8ad9efe9241fe442bc6ef2e9f62def386d8 100644
--- a/src/main/java/net/minecraft/server/EntityVillager.java
+++ b/src/main/java/net/minecraft/server/EntityVillager.java
@@ -39,7 +39,7 @@ public class EntityVillager extends EntityVillagerAbstract implements Reputation
@Nullable
private EntityHuman bv;
private byte bx;
- private final Reputation by;
+ private Reputation by; private void resetReputation() { this.by = new Reputation(); } // Paper - OBFHELPER
private long bz;
private long bA;
private int bB;
@@ -923,6 +923,7 @@ public class EntityVillager extends EntityVillagerAbstract implements Reputation
@Override
public void a(ReputationEvent reputationevent, Entity entity) {
if (reputationevent == ReputationEvent.a) {
+ if (world.paperConfig.fixCuringZombieVillagerDiscountExploit) this.resetReputation(); // Paper - fix MC-181190
this.by.a(entity.getUniqueID(), ReputationType.MAJOR_POSITIVE, 20);
this.by.a(entity.getUniqueID(), ReputationType.MINOR_POSITIVE, 25);
} else if (reputationevent == ReputationEvent.e) {