Paper/patches/server-remapped/0612-Fix-curing-zombie-villager-discount-exploit.patch

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2021-06-11 14:02:28 +02:00
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 relevant part of
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 7d3207a9af8360ddad228281d6aa65e1a0d24157..a3b3e3e04b7a5e3a351992e06870cc91fbd8adc8 100644
--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
@@ -717,4 +717,9 @@ 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/world/entity/ai/gossip/GossipContainer.java b/src/main/java/net/minecraft/world/entity/ai/gossip/GossipContainer.java
index 57832c392910d22aa81ac2b4816d043dd7ac867a..9a68201bab4fcbad69c85e2469a103634b65d7b3 100644
--- a/src/main/java/net/minecraft/world/entity/ai/gossip/GossipContainer.java
+++ b/src/main/java/net/minecraft/world/entity/ai/gossip/GossipContainer.java
@@ -223,6 +223,7 @@ public class GossipContainer {
}
+ public final void removeReputationForType(GossipType reputationType) { this.remove(reputationType); } // Paper - OBFHELPER
public void remove(GossipType gossipType) {
this.entries.removeInt(gossipType);
}
diff --git a/src/main/java/net/minecraft/world/entity/npc/Villager.java b/src/main/java/net/minecraft/world/entity/npc/Villager.java
index 415fa3591add1f1ab22dd5866e110dbfccd0ec93..7817071b1964b962c8f4017d5bb39d74ca0ca3e4 100644
--- a/src/main/java/net/minecraft/world/entity/npc/Villager.java
+++ b/src/main/java/net/minecraft/world/entity/npc/Villager.java
@@ -1013,6 +1013,15 @@ public class Villager extends AbstractVillager implements ReputationEventHandler
@Override
public void onReputationEventFrom(ReputationEventType interaction, Entity entity) {
if (interaction == ReputationEventType.ZOMBIE_VILLAGER_CURED) {
+ // Paper start - fix MC-181190
+ if (level.paperConfig.fixCuringZombieVillagerDiscountExploit) {
+ final GossipContainer.EntityGossips playerReputation = this.getReputation().getReputations().get(entity.getUUID());
+ if (playerReputation != null) {
+ playerReputation.removeReputationForType(GossipType.MAJOR_POSITIVE);
+ playerReputation.removeReputationForType(GossipType.MINOR_POSITIVE);
+ }
+ }
+ // Paper end
this.gossips.add(entity.getUUID(), GossipType.MAJOR_POSITIVE, 20);
this.gossips.add(entity.getUUID(), GossipType.MINOR_POSITIVE, 25);
} else if (interaction == ReputationEventType.TRADE) {