Add leave-buffer-distance to tolerate knockback at region edges

The ConcurrentModificationException happens because the player leave
procedure alters the `specPlayers` set, and this is the set we iterate
during the automatic spectator kicking procedure. By making a copy of
the set and iterating the copy, we circumvent this problem. Java 101,
really, but when the code is stateful and complex, it's "fair enough"
that it slipped through the cracks. It's also impossible to reproduce
without at least two players, so go figure...

Fixes #802

.gitea/workflows/build.yml

@@ -0,0 +1,78 @@
+name: build
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - '**'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    outputs:
+      version: ${{ steps.version.outputs.version }}
+
+    steps:
+      - name: 'Checkout'
+        uses: actions/checkout@v4
+
+      - name: 'Set up JDK'
+        uses: actions/setup-java@v4
+        with:
+          java-version: '25'
+          distribution: 'temurin'
+
+      - name: 'Build'
+        run: ./gradlew build --no-daemon
+
+      - name: 'Upload artifact'
+        uses: actions/upload-artifact@v3
+        with:
+          name: MobArena.jar
+          path: build/libs/MobArena-*.jar
+
+      - name: 'Output version'
+        id: version
+        run: |
+          version=$(
+            unzip -p build/libs/MobArena-*.jar plugin.yml \
+            | grep '^version: ' \
+            | awk '{printf $2}' \
+            | tr -d "'" \
+          )
+          echo "version=${version}" >> "${GITHUB_OUTPUT}"
+
+  draft:
+    needs: build
+
+    if: |
+      needs.build.result == 'success' &&
+      github.ref_name == 'master' &&
+      startsWith(github.event.head_commit.message, 'Release ') &&
+      !endsWith(needs.build.outputs.version, '-SNAPSHOT')
+
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: write
+
+    env:
+      VERSION: ${{ needs.build.outputs.version }}
+
+    steps:
+      - name: 'Checkout'
+        uses: actions/checkout@v4
+
+      - name: 'Download artifact'
+        uses: actions/download-artifact@v4
+        with:
+          name: MobArena.jar
+
+      - name: 'Extract release notes'
+        run: scripts/extract-release-notes -f github "${VERSION}" > release-notes.md
+
+      - name: 'Create release draft'
+        run: gh release create "${VERSION}" --draft --notes-file release-notes.md MobArena-*.jar
+        env:
+          GITHUB_TOKEN: ${{ github.token }}

.github/workflows/build.yml

@@ -18,10 +18,10 @@ jobs:
         uses: actions/checkout@v4
 
       - name: 'Set up JDK'
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
-          java-version: '11'
+          java-version: '25'
-          distribution: 'adopt'
+          distribution: 'temurin'
           cache: 'gradle'
 
       - name: 'Build'

README.md

@@ -1,7 +1,13 @@
-MobArena [![Build Status](https://github.com/garbagemule/MobArena/actions/workflows/build.yml/badge.svg?branch=master)](https://github.com/garbagemule/MobArena/actions/workflows/build.yml)
+MobArena — Paper 26.2 fork
-========
+==========================
 
-MobArena is an arena-style minigame for Spigot-based Minecraft servers
+This fork updates upstream MobArena 0.109 for **Paper 26.2** and **Java 25**. It removes the legacy Bukkit material access that could stall the server during arena explosions and updates APIs renamed in modern Paper.
+
+Upstream project: https://github.com/garbagemule/MobArena
+
+Build with `./gradlew build`. The deployable plugin is written to `build/libs/MobArena-0.109.1-tss3.jar`.
+
+MobArena is an arena-style minigame for Paper-based Minecraft servers.
 
 
 ## Getting Started

build.gradle.kts

@@ -1,31 +1,37 @@
 plugins {
     id("java-library")
-    id("com.github.johnrengelman.shadow") version "8.1.1"
+    id("com.gradleup.shadow") version "9.6.1"
+    id("maven-publish")
 }
 
 group = "com.garbagemule"
-version = "0.108.1-SNAPSHOT"
+version = "0.109.1-tss3"
 
 repositories {
     mavenLocal()
-    maven("https://hub.spigotmc.org/nexus/content/repositories/snapshots/")
+    maven("https://repo.papermc.io/repository/maven-public/")
     maven("https://jitpack.io")
     maven("https://repo.maven.apache.org/maven2/")
 }
 
 dependencies {
-    compileOnly("org.spigotmc:spigot-api:1.19-R0.1-SNAPSHOT")
+    compileOnly("io.papermc.paper:paper-api:26.2.build.84-stable")
     compileOnly("com.github.MilkBowl:VaultAPI:1.7.1")
     api("org.bstats:bstats-bukkit:2.2.1")
 
     testImplementation("junit:junit:4.13.2")
     testImplementation("org.hamcrest:hamcrest-all:1.3")
-    testImplementation("org.mockito:mockito-core:3.12.4")
+    testImplementation("org.mockito:mockito-core:5.23.0")
+    testImplementation("org.mockbukkit.mockbukkit:mockbukkit-v26.1.2:4.113.2")
 }
 
+// Tests use MockBukkit's exact Paper API build because 26.2 registries are not modeled yet.
+configurations.matching { it.name.startsWith("test") }.configureEach {
+    resolutionStrategy.force("io.papermc.paper:paper-api:26.1.2.build.57-stable")
+}
 java {
     toolchain {
-        languageVersion.set(JavaLanguageVersion.of(8))
+        languageVersion.set(JavaLanguageVersion.of(25))
     }
 }
 
@@ -66,3 +72,37 @@ tasks {
     // Let the build task produce the final artifact.
     build { dependsOn(shadowJar) }
 }
+
+publishing {
+    publications {
+        create<MavenPublication>("shadow") {
+            groupId = "com.garbagemule"
+            artifactId = "MobArena"
+            version = project.version.toString()
+            artifact(tasks.shadowJar)
+        }
+    }
+}
+val checkNoLegacyMaterialApi = tasks.register("checkNoLegacyMaterialApi") {
+    group = "verification"
+    description = "Fails if legacy Bukkit material access returns to production sources."
+    val sources = fileTree("src/main/java") { include("**/*.java") }
+    inputs.files(sources)
+
+    doLast {
+        val violations = sources.files.flatMap { file ->
+            file.readLines().mapIndexedNotNull { index, line ->
+                if ("org.bukkit.material" in line || "state.getData()" in line) {
+                    "${file.relativeTo(projectDir)}:${index + 1}"
+                } else null
+            }
+        }
+        check(violations.isEmpty()) {
+            "Legacy Bukkit material API usage found:\n${violations.joinToString("\n")}"
+        }
+    }
+}
+
+tasks.named("check") {
+    dependsOn(checkNoLegacyMaterialApi)
+}

changelog.md

@@ -11,15 +11,36 @@ These changes will (most likely) be included in the next version.
 
 
 ## [Unreleased]
+
+## [0.109.1-tss3] - 2026-08-06
+### Changed
+- Updated the build and runtime target to Paper 26.2 and Java 25.
+- Updated renamed health attributes, potion effects, and entity types for the current Paper API.
+- Updated Gradle, Shadow, Mockito, and the test harness for Java 25.
+
+### Fixed
+- Removed legacy Bukkit material access from explosion handling and arena block restoration. Creeper and other block explosions no longer initialize CraftLegacy and DataFixerUpper on the server thread.
+- Restored support-sensitive blocks without physics after their supporting blocks, avoiding legacy attached-face data while preserving soft restoration.
+
+## [0.109] - 2024-10-13
+### Added
+- MobArena now properly supports Vault economy providers registered after MobArena has started. This should make it possible to use custom economy providers that aren't built into Vault, such as those created with Denizen.
+- New wave rewards section `tiers` allows for _non-stacking_ reward tiers for beating certain waves. This allows for configuring reward sets that get "upgraded" as the waves progress, e.g. by granting a full leather armor set for beating wave 15, but beating wave 20 _replaces_ that leather armor set with an iron armor set.
+- New per-arena setting `spawnpoint-max-distance` can be used to tweak how close to any player a given spawnpoint must be to be considered valid when spawning monsters. This should help reduce the amount of spawnpoints required, especially for larger arenas.
+- New per-arena setting `spawnpoint-min-distance` can be used to tweak how far away from all players a given spawnpoint must be to be considered valid when spawning monsters. This should help prevent monsters from spawning directly on top of players.
+
 ### Changed
 - Recurrent waves can now be randomized. If two or more recurrent waves clash on wave number, frequency, _and_ priority, MobArena will now randomly pick between them. This should make it easier to create more varied and interesting wave setups without having to resort to only massively randomized default waves.
 - Single waves can now be randomized. If two or more single waves clash on wave number, MobArena will now randomly pick between them. This means it is now possible to make randomly selected bosses for boss waves, for instance.
+- Slimes, Magma Cubes, Bats, Ghasts, Phantoms, and Ender Dragons now all target players in the same way other monsters do.
 
 ### Fixed
 - MobArena no longer throws errors when handling block explosions on Minecraft 1.21.
+- MobArena no longer throws errors during the automatic removal of spectators when using `auto-leave-on-end: true`.
 - The `shuffle-positions` ability now correctly shuffles the position of the boss as well if `monster-teleport` is set to `false`.
 - The `obsidian-bomb` ability no longer breaks boss waves.
 - Text on Arena Signs is no longer explicitly truncated. This fixes an issue where color codes would count towards the character limit, causing the text that would otherwise fit on the sign to be cut off.
+- Arena Signs can once again be destroyed, but it is necessary to break them while sneaking.
 
 ## [0.108] - 2024-01-01
 ### Added
@@ -270,7 +291,9 @@ Thanks to:
 - Swatacular for help with testing bug fixes
 - Haileykins for contributions to the code base
 
-[Unreleased]: https://github.com/garbagemule/MobArena/compare/0.108...HEAD
+[Unreleased]: https://git.tss3.us/skywalker3200/MobArena/compare/0.109.1-tss3...master
+[0.109.1-tss3]: https://git.tss3.us/skywalker3200/MobArena/compare/0.109...0.109.1-tss3
+[0.109]: https://github.com/garbagemule/MobArena/compare/0.108...0.109
 [0.108]: https://github.com/garbagemule/MobArena/compare/0.107...0.108
 [0.107]: https://github.com/garbagemule/MobArena/compare/0.106...0.107
 [0.106]: https://github.com/garbagemule/MobArena/compare/0.105...0.106

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.5-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.6.1-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME

src/main/java/com/garbagemule/MobArena/ArenaImpl.java

@@ -43,10 +43,17 @@ import org.bukkit.attribute.Attribute;
 import org.bukkit.block.Block;
 import org.bukkit.block.BlockState;
 import org.bukkit.configuration.ConfigurationSection;
+import org.bukkit.entity.AbstractArrow;
 import org.bukkit.entity.AbstractHorse;
+import org.bukkit.entity.Boat;
 import org.bukkit.entity.Entity;
 import org.bukkit.entity.EntityType;
+import org.bukkit.entity.ExperienceOrb;
 import org.bukkit.entity.Horse;
+import org.bukkit.entity.Item;
+import org.bukkit.entity.Minecart;
+import org.bukkit.entity.ShulkerBullet;
+import org.bukkit.entity.TNTPrimed;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.InventoryHolder;
 import org.bukkit.inventory.InventoryView;
@@ -124,7 +131,10 @@ public class ArenaImpl implements Arena
     private WaveManager   waveManager;
     private MASpawnThread spawnThread;
     private SheepBouncer  sheepBouncer;
-    private Map<Integer, ThingPicker> everyWaveMap, afterWaveMap;
+    private Map<Integer, ThingPicker> everyWaveMap, afterWaveMap, waveTiersMap;
+    private double spawnpointMinDistanceSquared;
+    private double spawnpointMaxDistanceSquared;
+    private int leaveBufferDistance;
 
     // Misc
     private ArenaListener eventListener;
@@ -208,6 +218,10 @@ public class ArenaImpl implements Arena
         this.waveManager  = new WaveManager(this, section.getConfigurationSection("waves"));
         this.everyWaveMap = MAUtils.getArenaRewardMap(plugin, section, name, "every");
         this.afterWaveMap = MAUtils.getArenaRewardMap(plugin, section, name, "after");
+        this.waveTiersMap = MAUtils.getArenaRewardMap(plugin, section, name, "tiers");
+        this.spawnpointMinDistanceSquared = Math.pow(settings.getDouble("spawnpoint-min-distance", 0), 2);
+        this.spawnpointMaxDistanceSquared = Math.pow(settings.getDouble("spawnpoint-max-distance", 15), 2);
+        this.leaveBufferDistance = settings.getInt("leave-buffer-distance", 3);
 
         // Misc
         this.eventListener = new ArenaListener(this, plugin);
@@ -351,6 +365,11 @@ public class ArenaImpl implements Arena
         return afterWaveMap.get(wave);
     }
 
+    @Override
+    public ThingPicker getWaveTierReward(int wave) {
+        return waveTiersMap.get(wave);
+    }
+
     @Override
     public Set<Player> getPlayersInArena() {
         return Collections.unmodifiableSet(arenaPlayers);
@@ -376,6 +395,21 @@ public class ArenaImpl implements Arena
         return spawnThread;
     }
 
+    @Override
+    public double getSpawnpointMinDistanceSquared() {
+        return spawnpointMinDistanceSquared;
+    }
+
+    @Override
+    public double getSpawnpointMaxDistanceSquared() {
+        return spawnpointMaxDistanceSquared;
+    }
+
+    @Override
+    public int getLeaveBufferDistance() {
+        return leaveBufferDistance;
+    }
+
     @Override
     public WaveManager getWaveManager() {
         return waveManager;
@@ -645,7 +679,8 @@ public class ArenaImpl implements Arena
 
         // Auto-leave
         if (settings.getBoolean("auto-leave-on-end", false)) {
-            specPlayers.forEach(this::playerLeave);
+            List<Player> spectators = new ArrayList<>(specPlayers);
+            spectators.forEach(this::playerLeave);
         }
 
         return true;
@@ -1005,7 +1040,7 @@ public class ArenaImpl implements Arena
             mount.setTamed(true);
             mount.setOwner(p);
             mount.addPassenger(p);
-            mount.setHealth(mount.getAttribute(Attribute.GENERIC_MAX_HEALTH).getValue());
+            mount.setHealth(mount.getAttribute(Attribute.MAX_HEALTH).getValue());
 
             // Add saddle
             mount.getInventory().addItem(new ItemStack(Material.SADDLE));
@@ -1393,15 +1428,14 @@ public class ArenaImpl implements Arena
                     continue;
                 }
 
-                switch (e.getType()) {
+                if (e instanceof Item
-                    case DROPPED_ITEM:
+                    || e instanceof ExperienceOrb
-                    case EXPERIENCE_ORB:
+                    || e instanceof AbstractArrow
-                    case ARROW:
+                    || e instanceof Minecart
-                    case MINECART:
+                    || e instanceof Boat
-                    case BOAT:
+                    || e instanceof TNTPrimed
-                    case PRIMED_TNT:
+                    || e instanceof ShulkerBullet) {
-                    case SHULKER_BULLET:
+                    e.remove();
-                        e.remove();
                 }
             }
         }

src/main/java/com/garbagemule/MobArena/ArenaListener.java

@@ -25,6 +25,7 @@ import org.bukkit.Material;
 import org.bukkit.block.Block;
 import org.bukkit.block.BlockFace;
 import org.bukkit.block.BlockState;
+import org.bukkit.block.PistonMoveReaction;
 import org.bukkit.block.Sign;
 import org.bukkit.configuration.ConfigurationSection;
 import org.bukkit.entity.AbstractHorse;
@@ -89,10 +90,12 @@ import org.bukkit.event.vehicle.VehicleExitEvent;
 import org.bukkit.inventory.EquipmentSlot;
 import org.bukkit.inventory.InventoryHolder;
 import org.bukkit.inventory.ItemStack;
-import org.bukkit.material.Attachable;
+
-import org.bukkit.material.Bed;
+import org.bukkit.block.data.Bisected;
-import org.bukkit.material.Door;
+import org.bukkit.block.data.BlockData;
-import org.bukkit.material.Redstone;
+import org.bukkit.block.data.type.Bed;
+import org.bukkit.block.data.type.Door;
+
 import org.bukkit.metadata.MetadataValue;
 import org.bukkit.potion.PotionEffect;
 import org.bukkit.potion.PotionEffectType;
@@ -235,7 +238,7 @@ public class ArenaListener
                 r = new RepairableContainer(state);
             else if (state instanceof Sign)
                 r = new RepairableSign(state);
-            else if (state.getData() instanceof Attachable)
+            else if (state.getBlockData().getPistonMoveReaction() == PistonMoveReaction.BREAK)
                 r = new RepairableAttachable(state);
             else
                 r = new RepairableBlock(state);
@@ -485,12 +488,15 @@ public class ArenaListener
         // Handle all the blocks in the block list.
         for (Block b : blocks) {
             BlockState state = b.getState();
+            BlockData data = state.getBlockData();
 
-            if (state.getData() instanceof Door && ((Door) state.getData()).isTopHalf()) {
+            if (data instanceof Door && ((Door) data).getHalf() == Bisected.Half.TOP) {
                 state = b.getRelative(BlockFace.DOWN).getState();
+                data = state.getBlockData();
             }
-            else if (state.getData() instanceof Bed && ((Bed) state.getData()).isHeadOfBed()) {
+            else if (data instanceof Bed && ((Bed) data).getPart() == Bed.Part.HEAD) {
-                state = b.getRelative(((Bed) state.getData()).getFacing().getOppositeFace()).getState();
+                state = b.getRelative(((Bed) data).getFacing().getOppositeFace()).getState();
+                data = state.getBlockData();
             }
 
             // Create a Repairable from the block.
@@ -499,11 +505,11 @@ public class ArenaListener
                 r = new RepairableContainer(state);
             else if (state instanceof Sign)
                 r = new RepairableSign(state);
-            else if (state.getData() instanceof Bed)
+            else if (data instanceof Bed)
                 r = new RepairableBed(state);
-            else if (state.getData() instanceof Door)
+            else if (data instanceof Door)
                 r = new RepairableDoor(state);
-            else if (state.getData() instanceof Attachable || state.getData() instanceof Redstone)
+            else if (data.getPistonMoveReaction() == PistonMoveReaction.BREAK)
                 r = new RepairableAttachable(state);
             else
                 r = new RepairableBlock(state);
@@ -958,7 +964,7 @@ public class ArenaListener
                 // If a potion has harmful effects, remove all players.
                 for (PotionEffect effect : potion.getEffects()) {
                     PotionEffectType type = effect.getType();
-                    if (type.equals(PotionEffectType.HARM) || type.equals(PotionEffectType.POISON)) {
+                    if (type.equals(PotionEffectType.INSTANT_DAMAGE) || type.equals(PotionEffectType.POISON)) {
                         for (LivingEntity le : event.getAffectedEntities()) {
                             if (le instanceof Player) {
                                 event.setIntensity(le, 0.0);
@@ -972,7 +978,7 @@ public class ArenaListener
             // Otherwise, check for monster infighting
             for (PotionEffect effect : potion.getEffects()) {
                 PotionEffectType type = effect.getType();
-                if (type.equals(PotionEffectType.HARM) || type.equals(PotionEffectType.POISON)) {
+                if (type.equals(PotionEffectType.INSTANT_DAMAGE) || type.equals(PotionEffectType.POISON)) {
                     for (LivingEntity le : event.getAffectedEntities()) {
                         if (!(le instanceof Player)) {
                             event.setIntensity(le, 0.0);

src/main/java/com/garbagemule/MobArena/MASpawnThread.java

@@ -226,9 +226,9 @@ public class MASpawnThread implements Runnable
                 monsterManager.addMonster(e);
 
                 // Set the health.
-                int health = (int) Math.max(1D, e.getAttribute(Attribute.GENERIC_MAX_HEALTH).getValue() * mul);
+                int health = (int) Math.max(1D, e.getAttribute(Attribute.MAX_HEALTH).getValue() * mul);
                 try {
-                    e.getAttribute(Attribute.GENERIC_MAX_HEALTH).setBaseValue(health);
+                    e.getAttribute(Attribute.MAX_HEALTH).setBaseValue(health);
                     e.setHealth(health);
                 } catch (IllegalArgumentException ex) {
                     // Spigot... *facepalm*
@@ -266,9 +266,9 @@ public class MASpawnThread implements Runnable
                         }
                         break;
                     case SWARM:
-                        health = (int) (mul < 1D ? e.getAttribute(Attribute.GENERIC_MAX_HEALTH).getValue() * mul : 1);
+                        health = (int) (mul < 1D ? e.getAttribute(Attribute.MAX_HEALTH).getValue() * mul : 1);
                         health = Math.max(1, health);
-                        e.setHealth(Math.min(health, e.getAttribute(Attribute.GENERIC_MAX_HEALTH).getValue()));
+                        e.setHealth(Math.min(health, e.getAttribute(Attribute.MAX_HEALTH).getValue()));
                         break;
                     case SUPPLY:
                         SupplyWave sw = (SupplyWave) w;
@@ -345,7 +345,7 @@ public class MASpawnThread implements Runnable
     private void removeCheatingPlayers() {
         List<Player> players = new ArrayList<>(arena.getPlayersInArena());
         for (Player p : players) {
-            if (region.contains(p.getLocation())) {
+            if (region.contains(p.getLocation(), arena.getLeaveBufferDistance())) {
                 continue;
             }
 
@@ -366,6 +366,11 @@ public class MASpawnThread implements Runnable
         if (after != null) {
             addReward(after);
         }
+
+        ThingPicker tier = arena.getWaveTierReward(wave);
+        if (tier != null) {
+            setRewardTier(tier);
+        }
     }
 
     private void updateStats(int wave) {
@@ -400,4 +405,14 @@ public class MASpawnThread implements Runnable
             }
         }
     }
+
+    private void setRewardTier(ThingPicker picker) {
+        for (Player p : arena.getPlayersInArena()) {
+            Thing reward = picker.pick();
+            if (reward != null) {
+                rewardManager.setTieredReward(p, reward);
+                arena.getMessenger().tell(p, Msg.WAVE_TIER_REWARD, reward.toString());
+            }
+        }
+    }
 }

src/main/java/com/garbagemule/MobArena/MAUtils.java

@@ -88,6 +88,7 @@ public class MAUtils
         /* Iterate through the ArrayList, and update current and result every
          * time a squared distance smaller than current is found. */
         List<Player> players = new ArrayList<>(arena.getPlayersInArena());
+        double max = arena.getSpawnpointMaxDistanceSquared();
         for (Player p : players) {
             if (!arena.getWorld().equals(p.getWorld())) {
                 plugin.getLogger().info("Player '" + p.getName() + "' is not in the right world. Kicking...");
@@ -97,7 +98,7 @@ public class MAUtils
             }
 
             double dist = distanceSquared(plugin, p, e.getLocation());
-            if (dist < current && dist < 256D) {
+            if (dist < current && dist < max) {
                 current = dist;
                 result = p;
             }

src/main/java/com/garbagemule/MobArena/MobArena.java

@@ -2,6 +2,8 @@ package com.garbagemule.MobArena;
 
 import com.garbagemule.MobArena.commands.CommandHandler;
 import com.garbagemule.MobArena.config.LoadsConfigFile;
+import com.garbagemule.MobArena.finance.Finance;
+import com.garbagemule.MobArena.finance.FinanceFactory;
 import com.garbagemule.MobArena.events.MobArenaPreReloadEvent;
 import com.garbagemule.MobArena.events.MobArenaReloadEvent;
 import com.garbagemule.MobArena.formula.FormulaMacros;
@@ -17,7 +19,6 @@ import com.garbagemule.MobArena.metrics.FoodRegenChart;
 import com.garbagemule.MobArena.metrics.IsolatedChatChart;
 import com.garbagemule.MobArena.metrics.MonsterInfightChart;
 import com.garbagemule.MobArena.metrics.PvpEnabledChart;
-import com.garbagemule.MobArena.metrics.VaultChart;
 import com.garbagemule.MobArena.signs.SignBootstrap;
 import com.garbagemule.MobArena.signs.SignListeners;
 import com.garbagemule.MobArena.things.NothingPickerParser;
@@ -27,16 +28,12 @@ import com.garbagemule.MobArena.things.ThingManager;
 import com.garbagemule.MobArena.things.ThingPickerManager;
 import com.garbagemule.MobArena.util.config.ConfigUtils;
 import com.garbagemule.MobArena.waves.ability.AbilityManager;
-import net.milkbowl.vault.economy.Economy;
 import org.bstats.bukkit.Metrics;
 import org.bukkit.ChatColor;
 import org.bukkit.configuration.InvalidConfigurationException;
 import org.bukkit.configuration.file.FileConfiguration;
 import org.bukkit.configuration.file.YamlConfiguration;
-import org.bukkit.plugin.Plugin;
 import org.bukkit.plugin.PluginManager;
-import org.bukkit.plugin.RegisteredServiceProvider;
-import org.bukkit.plugin.ServicesManager;
 import org.bukkit.plugin.java.JavaPlugin;
 
 import java.io.File;
@@ -52,8 +49,7 @@ public class MobArena extends JavaPlugin
 {
     private ArenaMaster arenaMaster;
 
-    // Vault
+    private Finance finance;
-    private Economy economy;
 
     private FileConfiguration config;
     private LoadsConfigFile loadsConfigFile;
@@ -113,7 +109,6 @@ public class MobArena extends JavaPlugin
             setupArenaMaster();
             setupCommandHandler();
 
-            setupVault();
             setupBossAbilities();
             setupListeners();
             setupMetrics();
@@ -150,24 +145,6 @@ public class MobArena extends JavaPlugin
         getCommand("ma").setExecutor(new CommandHandler(this));
     }
 
-    private void setupVault() {
-        Plugin vaultPlugin = this.getServer().getPluginManager().getPlugin("Vault");
-        if (vaultPlugin == null) {
-            getLogger().info("Vault was not found. Economy rewards will not work.");
-            return;
-        }
-
-        ServicesManager manager = this.getServer().getServicesManager();
-        RegisteredServiceProvider<Economy> e = manager.getRegistration(net.milkbowl.vault.economy.Economy.class);
-
-        if (e != null) {
-            economy = e.getProvider();
-            getLogger().info("Vault found; economy rewards enabled.");
-        } else {
-            getLogger().warning("Vault found, but no economy plugin detected. Economy rewards will not work!");
-        }
-    }
-
     private void setupBossAbilities() {
         AbilityManager.loadCoreAbilities();
         AbilityManager.loadCustomAbilities(getDataFolder());
@@ -180,7 +157,6 @@ public class MobArena extends JavaPlugin
 
     private void setupMetrics() {
         Metrics metrics = new Metrics(this, 2572);
-        metrics.addCustomChart(new VaultChart(this));
         metrics.addCustomChart(new ArenaCountChart(this));
         metrics.addCustomChart(new ClassCountChart(this));
         metrics.addCustomChart(new ClassChestsChart(this));
@@ -195,6 +171,7 @@ public class MobArena extends JavaPlugin
         getServer().getPluginManager().callEvent(pre);
 
         try {
+            reloadFinance();
             reloadConfig();
             reloadGlobalMessenger();
             reloadFormulaMacros();
@@ -211,6 +188,10 @@ public class MobArena extends JavaPlugin
         getServer().getPluginManager().callEvent(post);
     }
 
+    private void reloadFinance() {
+        finance = FinanceFactory.create(getServer(), getLogger());
+    }
+
     @Override
     public void reloadConfig() {
         if (loadsConfigFile == null) {
@@ -307,8 +288,8 @@ public class MobArena extends JavaPlugin
         return arenaMaster;
     }
 
-    public Economy getEconomy() {
+    public Finance getFinance() {
-        return economy;
+        return finance;
     }
 
     public Messenger getGlobalMessenger() {

src/main/java/com/garbagemule/MobArena/Msg.java

@@ -78,6 +78,7 @@ public enum Msg {
     WAVE_BOSS_KILLED("&a%&r killed the boss!"),
     WAVE_BOSS_REWARD_EARNED("You earned: &e%"),
     WAVE_REWARD("You just earned a reward: &e%&r"),
+    WAVE_TIER_REWARD("You just unlocked a new reward tier: &e%&r"),
     MISC_REWARD_ADDED("You were just given a reward: &e%&r"),
     MISC_LIST_PLAYERS("Live players: &a%&r"),
     MISC_LIST_ARENAS("Available arenas: %"),

src/main/java/com/garbagemule/MobArena/RewardManager.java

@@ -14,15 +14,18 @@ import java.util.Set;
 public class RewardManager
 {
     private Map<Player,List<Thing>> players;
+    private Map<Player,Thing> tiered;
     private Set<Player> rewarded;
 
     public RewardManager(Arena arena) {
         this.players  = new HashMap<>();
+        this.tiered  = new HashMap<>();
         this.rewarded = new HashSet<>();
     }
 
     public void reset() {
         players.clear();
+        tiered.clear();
         rewarded.clear();
     }
 
@@ -33,7 +36,17 @@ public class RewardManager
         players.get(p).add(thing);
     }
 
+    public void setTieredReward(Player p, Thing thing) {
+        tiered.put(p, thing);
+    }
+
     public void grantRewards(Player p) {
+        grantNormalRewards(p);
+        grantTieredRewards(p);
+        rewarded.add(p);
+    }
+
+    private void grantNormalRewards(Player p) {
         if (rewarded.contains(p)) return;
 
         List<Thing> rewards = players.get(p);
@@ -45,6 +58,14 @@ public class RewardManager
             }
             reward.giveTo(p);
         }
-        rewarded.add(p);
+    }
+
+    private void grantTieredRewards(Player p) {
+        if (rewarded.contains(p)) return;
+
+        Thing reward = tiered.get(p);
+        if (reward == null) return;
+
+        reward.giveTo(p);
     }
 }

src/main/java/com/garbagemule/MobArena/finance/Finance.java

@@ -0,0 +1,15 @@
+package com.garbagemule.MobArena.finance;
+
+import org.bukkit.entity.Player;
+
+public interface Finance {
+
+    double getBalance(Player player);
+
+    boolean deposit(Player player, double amount);
+
+    boolean withdraw(Player player, double amount);
+
+    String format(double amount);
+
+}

src/main/java/com/garbagemule/MobArena/finance/FinanceFactory.java

@@ -0,0 +1,25 @@
+package com.garbagemule.MobArena.finance;
+
+import org.bukkit.Server;
+import org.bukkit.plugin.Plugin;
+import org.bukkit.plugin.ServicesManager;
+
+import java.util.logging.Logger;
+
+public class FinanceFactory {
+
+    FinanceFactory() {
+        // OK BOSS
+    }
+
+    public static Finance create(Server server, Logger log) {
+        Plugin plugin = server.getPluginManager().getPlugin("Vault");
+        if (plugin == null) {
+            return new UnsupportedFinance(log);
+        }
+
+        ServicesManager services = server.getServicesManager();
+        return new VaultFinance(services, log);
+    }
+
+}

src/main/java/com/garbagemule/MobArena/finance/UnsupportedFinance.java

@@ -0,0 +1,39 @@
+package com.garbagemule.MobArena.finance;
+
+import org.bukkit.entity.Player;
+
+import java.util.logging.Logger;
+
+public class UnsupportedFinance implements Finance {
+
+    private final Logger log;
+
+    public UnsupportedFinance(Logger log) {
+        this.log = log;
+    }
+
+    @Override
+    public double getBalance(Player player) {
+        log.severe("Economy operations are only supported via Vault!");
+        return -1.0;
+    }
+
+    @Override
+    public boolean deposit(Player player, double amount) {
+        log.severe("Economy operations are only supported via Vault!");
+        return false;
+    }
+
+    @Override
+    public boolean withdraw(Player player, double amount) {
+        log.severe("Economy operations are only supported via Vault!");
+        return false;
+    }
+
+    @Override
+    public String format(double amount) {
+        log.severe("Economy operations are only supported via Vault!");
+        return "ERROR";
+    }
+
+}

src/main/java/com/garbagemule/MobArena/finance/VaultFinance.java

@@ -0,0 +1,78 @@
+package com.garbagemule.MobArena.finance;
+
+import net.milkbowl.vault.economy.Economy;
+import net.milkbowl.vault.economy.EconomyResponse;
+import org.bukkit.entity.Player;
+import org.bukkit.plugin.RegisteredServiceProvider;
+import org.bukkit.plugin.ServicesManager;
+
+import java.util.logging.Logger;
+
+public class VaultFinance implements Finance {
+
+    private final ServicesManager services;
+    private final Logger log;
+
+    private Economy economy;
+
+    public VaultFinance(ServicesManager services, Logger log) {
+        this.services = services;
+        this.log = log;
+    }
+
+    @Override
+    public double getBalance(Player player) {
+        try {
+            return getEconomy().getBalance(player);
+        } catch (IllegalStateException e) {
+            log.severe("Failed to check balance of player " + player.getName() + " because: " + e.getMessage());
+            return 0;
+        }
+    }
+
+    @Override
+    public boolean deposit(Player player, double amount) {
+        try {
+            EconomyResponse res = getEconomy().depositPlayer(player, amount);
+            return res.type == EconomyResponse.ResponseType.SUCCESS;
+        } catch (IllegalStateException e) {
+            log.severe("Failed to give " + amount + " economy money to player " + player.getName() + " because: " + e.getMessage());
+            return false;
+        }
+    }
+
+    @Override
+    public boolean withdraw(Player player, double amount) {
+        try {
+            EconomyResponse res = getEconomy().withdrawPlayer(player, amount);
+            return res.type == EconomyResponse.ResponseType.SUCCESS;
+        } catch (IllegalStateException e) {
+            log.severe("Failed to take " + amount + " economy money from player " + player.getName() + " because: " + e.getMessage());
+            return false;
+        }
+    }
+
+    @Override
+    public String format(double amount) {
+        try {
+            return getEconomy().format(amount);
+        } catch (IllegalStateException e) {
+            log.severe("Failed to format " + amount + " as economy money because: " + e.getMessage());
+            return "ERROR";
+        }
+    }
+
+    private Economy getEconomy() {
+        if (economy != null) {
+            return economy;
+        }
+
+        RegisteredServiceProvider<Economy> provider = services.getRegistration(Economy.class);
+        if (provider == null) {
+            throw new IllegalStateException("No Vault economy provider found!");
+        }
+
+        return (economy = provider.getProvider());
+    }
+
+}

src/main/java/com/garbagemule/MobArena/framework/Arena.java

@@ -70,6 +70,8 @@ public interface Arena
 
     ThingPicker getAfterWaveReward(int wave);
 
+    ThingPicker getWaveTierReward(int wave);
+
     Set<Player> getPlayersInArena();
 
     Set<Player> getPlayersInLobby();
@@ -80,6 +82,12 @@ public interface Arena
 
     MASpawnThread getSpawnThread();
 
+    double getSpawnpointMinDistanceSquared();
+
+    double getSpawnpointMaxDistanceSquared();
+
+    int getLeaveBufferDistance();
+
     WaveManager getWaveManager();
 
     ArenaListener getEventListener();

src/main/java/com/garbagemule/MobArena/metrics/VaultChart.java

@@ -1,12 +0,0 @@
-package com.garbagemule.MobArena.metrics;
-
-import com.garbagemule.MobArena.MobArena;
-import org.bstats.charts.SimplePie;
-
-public class VaultChart extends SimplePie {
-
-    public VaultChart(MobArena plugin) {
-        super("uses_vault", () -> plugin.getEconomy() != null ? "Yes" : "No");
-    }
-
-}

src/main/java/com/garbagemule/MobArena/region/ArenaRegion.java

@@ -648,9 +648,12 @@ public class ArenaRegion
         }
 
         // Find all the spawnpoints that cover the location
+        double min = arena.getSpawnpointMinDistanceSquared();
+        double max = arena.getSpawnpointMaxDistanceSquared();
         Map<String,Location> map = new HashMap<>();
         for (Map.Entry<String,Location> entry : spawnpoints.entrySet()) {
-            if (p.getLocation().distanceSquared(entry.getValue()) < MobArena.MIN_PLAYER_DISTANCE_SQUARED) {
+            double dist = p.getLocation().distanceSquared(entry.getValue());
+            if (min <= dist && dist <= max) {
                 map.put(entry.getKey(), entry.getValue());
             }
         }

src/main/java/com/garbagemule/MobArena/repairable/RepairableAttachable.java

@@ -2,37 +2,20 @@ package com.garbagemule.MobArena.repairable;
 
 import org.bukkit.Material;
 import org.bukkit.block.Block;
-import org.bukkit.block.BlockFace;
 import org.bukkit.block.BlockState;
-import org.bukkit.material.Attachable;
 
 public class RepairableAttachable extends RepairableBlock
 {
-    private int x, y, z;
-
     public RepairableAttachable(BlockState state)
     {
         super(state);
-
+        state.getBlock().setType(Material.STONE, false);
-        BlockState attached;
-        if (state.getData() instanceof Attachable)
-            attached = state.getBlock().getRelative(((Attachable) state.getData()).getAttachedFace()).getState();
-        else
-            attached = state.getBlock().getRelative(BlockFace.DOWN).getState();
-
-        x = attached.getX();
-        y = attached.getY();
-        z = attached.getZ();
-
-        state.getBlock().setType(Material.STONE);
     }
 
+    @Override
     public void repair()
     {
-        Block b = getWorld().getBlockAt(x,y,z);
+        Block block = getWorld().getBlockAt(getX(), getY(), getZ());
-        if (b.getType() == Material.AIR)
+        block.setBlockData(getData(), false);
-            b.setType(Material.STONE);
-
-        super.repair();
     }
 }

src/main/java/com/garbagemule/MobArena/repairable/RepairableBed.java

@@ -1,7 +1,7 @@
 package com.garbagemule.MobArena.repairable;
 
 import org.bukkit.block.BlockState;
-import org.bukkit.material.Bed;
+import org.bukkit.block.data.type.Bed;
 
 public class RepairableBed extends RepairableBlock
 {
@@ -10,12 +10,12 @@ public class RepairableBed extends RepairableBlock
     public RepairableBed(BlockState state)
     {
         super(state);
-        other = state.getBlock().getRelative(((Bed) state.getData()).getFacing()).getState();
+        other = state.getBlock().getRelative(((Bed) state.getBlockData()).getFacing()).getState();
     }
 
     public void repair()
     {
-        if (getWorld().getBlockAt(getX(), getY(), getZ()).getState().getData() instanceof Bed)
+        if (getWorld().getBlockAt(getX(), getY(), getZ()).getBlockData() instanceof Bed)
             return;
 
         super.repair();

src/main/java/com/garbagemule/MobArena/repairable/RepairableComparator.java

@@ -1,11 +1,10 @@
 package com.garbagemule.MobArena.repairable;
 
 import org.bukkit.Material;
-import org.bukkit.block.data.Attachable;
+import org.bukkit.block.PistonMoveReaction;
 import org.bukkit.block.data.BlockData;
 import org.bukkit.block.data.type.Bed;
 import org.bukkit.block.data.type.Door;
-import org.bukkit.block.data.type.RedstoneWire;
 
 import java.util.Comparator;
 
@@ -30,6 +29,6 @@ public class RepairableComparator implements Comparator<Repairable>
         Material t = r.getType();
         BlockData data = r.getData();
 
-        return (data instanceof Attachable || data instanceof RedstoneWire || data instanceof Door || data instanceof Bed || t == Material.LAVA || t == Material.WATER || t == Material.FIRE);
+        return (data.getPistonMoveReaction() == PistonMoveReaction.BREAK || data instanceof Door || data instanceof Bed || t == Material.LAVA || t == Material.WATER || t == Material.FIRE);
     }
 }

src/main/java/com/garbagemule/MobArena/repairable/RepairableDoor.java

@@ -4,7 +4,7 @@ import org.bukkit.Material;
 import org.bukkit.block.Block;
 import org.bukkit.block.BlockFace;
 import org.bukkit.block.BlockState;
-import org.bukkit.material.Door;
+import org.bukkit.block.data.type.Door;
 
 public class RepairableDoor extends RepairableAttachable//RepairableBlock
 {
@@ -24,7 +24,7 @@ public class RepairableDoor extends RepairableAttachable//RepairableBlock
 
     public void repair()
     {
-        if (getWorld().getBlockAt(getX(), getY(), getZ()).getState().getData() instanceof Door)
+        if (getWorld().getBlockAt(getX(), getY(), getZ()).getBlockData() instanceof Door)
             return;
 
         Block b = getWorld().getBlockAt(x,y,z);

src/main/java/com/garbagemule/MobArena/signs/HandlesSignClicks.java

@@ -6,6 +6,7 @@ import org.bukkit.entity.Player;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.EventPriority;
 import org.bukkit.event.Listener;
+import org.bukkit.event.block.Action;
 import org.bukkit.event.player.PlayerInteractEvent;
 
 import java.util.HashMap;
@@ -29,7 +30,7 @@ class HandlesSignClicks implements Listener {
         this.cooldowns = new HashMap<>();
     }
 
-    @EventHandler(priority = EventPriority.MONITOR)
+    @EventHandler(priority = EventPriority.HIGHEST)
     public void on(PlayerInteractEvent event) {
         Block block = event.getClickedBlock();
         if (block == null) {
@@ -38,6 +39,9 @@ class HandlesSignClicks implements Listener {
         if (!(block.getState() instanceof Sign)) {
             return;
         }
+        if (event.getPlayer().isSneaking() && event.getAction() == Action.LEFT_CLICK_BLOCK) {
+            return;
+        }
 
         ArenaSign sign = signStore.findByLocation(block.getLocation());
         if (sign != null) {

src/main/java/com/garbagemule/MobArena/steps/SetHealth.java

@@ -24,13 +24,13 @@ class SetHealth extends PlayerStep {
         player.setRemainingAir(NORMAL_AIR);
         player.setFireTicks(NORMAL_FIRE);
 
-        double full = player.getAttribute(Attribute.GENERIC_MAX_HEALTH).getValue();
+        double full = player.getAttribute(Attribute.MAX_HEALTH).getValue();
         player.setHealth(full);
     }
 
     @Override
     public void undo() {
-        double max = player.getAttribute(Attribute.GENERIC_MAX_HEALTH).getValue();
+        double max = player.getAttribute(Attribute.MAX_HEALTH).getValue();
         double capped = Math.min(health, max);
         player.setHealth(capped);
 

src/main/java/com/garbagemule/MobArena/things/MoneyThing.java

@@ -1,52 +1,36 @@
 package com.garbagemule.MobArena.things;
 
-import net.milkbowl.vault.economy.Economy;
+import com.garbagemule.MobArena.finance.Finance;
-import net.milkbowl.vault.economy.EconomyResponse;
-import net.milkbowl.vault.economy.EconomyResponse.ResponseType;
 import org.bukkit.entity.Player;
 
 public class MoneyThing implements Thing {
 
-    private final Economy economy;
+    private final Finance finance;
     private final double amount;
 
-    public MoneyThing(Economy economy, double amount) {
+    public MoneyThing(Finance finance, double amount) {
-        this.economy = economy;
+        this.finance = finance;
         this.amount = amount;
     }
 
     @Override
     public boolean giveTo(Player player) {
-        if (economy == null) {
+        return finance.deposit(player, amount);
-            return false;
-        }
-        EconomyResponse result = economy.depositPlayer(player, amount);
-        return result.type == ResponseType.SUCCESS;
     }
 
     @Override
     public boolean takeFrom(Player player) {
-        if (economy == null) {
+        return finance.withdraw(player, amount);
-            return false;
-        }
-        EconomyResponse result = economy.withdrawPlayer(player, amount);
-        return result.type == ResponseType.SUCCESS;
     }
 
     @Override
     public boolean heldBy(Player player) {
-        if (economy == null) {
+        return finance.getBalance(player) >= amount;
-            return false;
-        }
-        return economy.getBalance(player) >= amount;
     }
 
     @Override
     public String toString() {
-        if (economy == null) {
+        return finance.format(amount);
-            return "$" + amount;
-        }
-        return economy.format(amount);
     }
 
 }

src/main/java/com/garbagemule/MobArena/things/MoneyThingParser.java

@@ -1,7 +1,7 @@
 package com.garbagemule.MobArena.things;
 
 import com.garbagemule.MobArena.MobArena;
-import net.milkbowl.vault.economy.Economy;
+import com.garbagemule.MobArena.finance.Finance;
 
 class MoneyThingParser implements ThingParser {
 
@@ -20,11 +20,11 @@ class MoneyThingParser implements ThingParser {
         if (money == null) {
             return null;
         }
-        Economy economy = plugin.getEconomy();
+
-        if (economy == null) {
+        Finance finance = plugin.getFinance();
-            plugin.getLogger().severe("Vault or economy plugin missing while parsing: " + s);
+        double amount = Double.parseDouble(money);
-        }
+
-        return new MoneyThing(economy, Double.parseDouble(money));
+        return new MoneyThing(finance, amount);
     }
 
     private String trimPrefix(String s) {

src/main/java/com/garbagemule/MobArena/waves/MABoss.java

@@ -25,7 +25,7 @@ public class MABoss
      */
     public MABoss(LivingEntity entity, double maxHealth) {
         try {
-            entity.getAttribute(Attribute.GENERIC_MAX_HEALTH).setBaseValue(maxHealth);
+            entity.getAttribute(Attribute.MAX_HEALTH).setBaseValue(maxHealth);
             entity.setHealth(maxHealth);
         } catch (IllegalArgumentException ex) {
             // Spigot... *facepalm*
@@ -57,7 +57,7 @@ public class MABoss
      * @return the maximum health of the boss
      */
     public double getMaxHealth() {
-        return entity.getAttribute(Attribute.GENERIC_MAX_HEALTH).getValue();
+        return entity.getAttribute(Attribute.MAX_HEALTH).getValue();
     }
 
     /**

src/main/java/com/garbagemule/MobArena/waves/MACreature.java

@@ -7,11 +7,11 @@ import org.bukkit.DyeColor;
 import org.bukkit.Location;
 import org.bukkit.World;
 import org.bukkit.entity.Bee;
-import org.bukkit.entity.Creature;
 import org.bukkit.entity.Creeper;
 import org.bukkit.entity.EntityType;
 import org.bukkit.entity.Hoglin;
 import org.bukkit.entity.LivingEntity;
+import org.bukkit.entity.Mob;
 import org.bukkit.entity.PigZombie;
 import org.bukkit.entity.PiglinAbstract;
 import org.bukkit.entity.Rabbit;
@@ -181,9 +181,9 @@ public class MACreature {
                 break;
         }
 
-        if (e instanceof Creature) {
+        if (e instanceof Mob) {
-            Creature c = (Creature) e;
+            Mob m = (Mob) e;
-            c.setTarget(WaveUtils.getClosestPlayer(arena, e));
+            m.setTarget(WaveUtils.getClosestPlayer(arena, e));
         }
 
         return e;

src/main/java/com/garbagemule/MobArena/waves/WaveUtils.java

@@ -27,14 +27,42 @@ public class WaveUtils
             spawnpoints = arena.getRegion().getSpawnpointList();
         }
 
-        // Loop through each one and check if any players are in range.
+        double min = arena.getSpawnpointMinDistanceSquared();
-        for (Location l : spawnpoints) {
+        double max = arena.getSpawnpointMaxDistanceSquared();
-            for (Player p : players) {
+
-                if (MAUtils.distanceSquared(plugin, p, l) >= MobArena.MIN_PLAYER_DISTANCE_SQUARED) {
+        if (min > 0) {
-                    continue;
+            // If the min distance is greater than 0, we need to check the
+            // distance of every player, because one player within the max
+            // range is no longer enough to make a spawnpoint valid. If even
+            // a single player is too close, the spawnpoint is invalid.
+            for (Location l : spawnpoints) {
+                boolean valid = false;
+                for (Player p : players) {
+                    double dist = MAUtils.distanceSquared(plugin, p, l);
+                    if (dist < min) {
+                        valid = false;
+                        break;
+                    }
+                    if (dist <= max) {
+                        valid = true;
+                    }
+                }
+                if (valid) {
+                    result.add(l);
+                }
+            }
+        } else {
+            // If the min distance is 0, the old "any player within range"
+            // approach is sufficient, because we can never invalidate a
+            // spawnpoint for being too close to a player.
+            for (Location l : spawnpoints) {
+                for (Player p : players) {
+                    double dist = MAUtils.distanceSquared(plugin, p, l);
+                    if (dist <= max) {
+                        result.add(l);
+                        break;
+                    }
                 }
-                result.add(l);
-                break;
             }
         }
 
@@ -70,7 +98,7 @@ public class WaveUtils
             }
 
             dist = p.getLocation().distanceSquared(e.getLocation());
-            if (dist < current && dist < MobArena.MIN_PLAYER_DISTANCE_SQUARED)
+            if (dist < current && dist < arena.getSpawnpointMaxDistanceSquared())
             {
                 current = dist;
                 result = p;

src/main/java/com/garbagemule/MobArena/waves/ability/core/RootTarget.java

@@ -33,8 +33,8 @@ public class RootTarget implements Ability
             return;
 
         Player player = (Player) target;
-        player.addPotionEffect(new PotionEffect(PotionEffectType.SLOW, DURATION, AMPLIFIER));
+        player.addPotionEffect(new PotionEffect(PotionEffectType.SLOWNESS, DURATION, AMPLIFIER));
         player.addPotionEffect(new PotionEffect(PotionEffectType.SLOW_FALLING, DURATION, AMPLIFIER));
-        player.addPotionEffect(new PotionEffect(PotionEffectType.JUMP, DURATION, -AMPLIFIER));
+        player.addPotionEffect(new PotionEffect(PotionEffectType.JUMP_BOOST, DURATION, -AMPLIFIER));
     }
 }

src/main/resources/plugin.yml

@@ -2,7 +2,7 @@ name: ${project.name}
 author: garbagemule
 main: com.garbagemule.MobArena.MobArena
 version: '${project.version}'
-api-version: 1.13
+api-version: '26.2'
 softdepend: [Multiverse-Core,Towny,Heroes,MagicSpells,Vault]
 commands:
     ma:

src/main/resources/res/rewards.yml

@@ -7,3 +7,7 @@ waves:
         '7': minecart, chest_minecart, furnace_minecart
         '13': iron_sword, iron_pickaxe, iron_shovel
         '16': diamond_sword
+    tiers:
+        '4': diamond
+        '11': diamond:10
+        '17': diamond:25

src/main/resources/res/settings.yml

@@ -27,6 +27,9 @@ first-wave-delay: 5
 next-wave-delay: 0
 wave-interval: 15
 final-wave: 0
+spawnpoint-min-distance: 0
+spawnpoint-max-distance: 15
+leave-buffer-distance: 3
 monster-limit: 100
 monster-exp: false
 keep-exp: false

src/test/java/com/garbagemule/MobArena/finance/FinanceFactoryTest.java

@@ -0,0 +1,58 @@
+package com.garbagemule.MobArena.finance;
+
+import org.bukkit.Server;
+import org.bukkit.plugin.Plugin;
+import org.bukkit.plugin.PluginManager;
+import org.junit.Test;
+
+import java.util.logging.Logger;
+
+import static org.hamcrest.CoreMatchers.instanceOf;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+public class FinanceFactoryTest {
+
+    @Test
+    public void looksUpVaultPluginFromPluginManager() {
+        Server server = mock(Server.class);
+        Logger log = mock(Logger.class);
+        PluginManager plugins = mock(PluginManager.class);
+        when(server.getPluginManager()).thenReturn(plugins);
+
+        FinanceFactory.create(server, log);
+
+        verify(plugins).getPlugin("Vault");
+    }
+
+    @Test
+    public void createsUnsupportedFinanceIfVaultNotPresent() {
+        Server server = mock(Server.class);
+        Logger log = mock(Logger.class);
+        PluginManager plugins = mock(PluginManager.class);
+        when(server.getPluginManager()).thenReturn(plugins);
+        when(plugins.getPlugin(any())).thenReturn(null);
+
+        Finance result = FinanceFactory.create(server, log);
+
+        assertThat(result, instanceOf(UnsupportedFinance.class));
+    }
+
+    @Test
+    public void createsVaultFinanceIfVaultIsPresent() {
+        Server server = mock(Server.class);
+        Logger log = mock(Logger.class);
+        Plugin vault = mock(Plugin.class);
+        PluginManager plugins = mock(PluginManager.class);
+        when(server.getPluginManager()).thenReturn(plugins);
+        when(plugins.getPlugin(any())).thenReturn(vault);
+
+        Finance result = FinanceFactory.create(server, log);
+
+        assertThat(result, instanceOf(VaultFinance.class));
+    }
+
+}

src/test/java/com/garbagemule/MobArena/finance/UnsupportedFinanceTest.java

@@ -0,0 +1,82 @@
+package com.garbagemule.MobArena.finance;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import java.util.logging.Logger;
+
+import static org.hamcrest.CoreMatchers.equalTo;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verify;
+
+public class UnsupportedFinanceTest {
+
+    private Logger log;
+    private UnsupportedFinance subject;
+
+    @Before
+    public void setup() {
+        log = mock(Logger.class);
+
+        subject = new UnsupportedFinance(log);
+    }
+
+    @Test
+    public void logsErrorOnGetBalance() {
+        subject.getBalance(null);
+
+        verify(log).severe(anyString());
+    }
+
+    @Test
+    public void returnsNegativeOneOnGetBalance() {
+        double result = subject.getBalance(null);
+
+        assertThat(result, equalTo(-1.0));
+    }
+
+    @Test
+    public void logsErrorOnDeposit() {
+        subject.deposit(null, 1337);
+
+        verify(log).severe(anyString());
+    }
+
+    @Test
+    public void returnsFalseOnDeposit() {
+        boolean result = subject.deposit(null, 1337);
+
+        assertThat(result, equalTo(false));
+    }
+
+    @Test
+    public void logsErrorOnWithdraw() {
+        subject.withdraw(null, 1337);
+
+        verify(log).severe(anyString());
+    }
+
+    @Test
+    public void returnsFalseOnWithdraw() {
+        boolean result = subject.withdraw(null, 1337);
+
+        assertThat(result, equalTo(false));
+    }
+
+    @Test
+    public void logsErrorOnFormat() {
+        subject.format(1337);
+
+        verify(log).severe(anyString());
+    }
+
+    @Test
+    public void returnsErrorStringOnFormat() {
+        String result = subject.format(1337);
+
+        assertThat(result, equalTo("ERROR"));
+    }
+
+}

src/test/java/com/garbagemule/MobArena/finance/VaultFinanceTest.java

@@ -0,0 +1,146 @@
+package com.garbagemule.MobArena.finance;
+
+import net.milkbowl.vault.economy.Economy;
+import net.milkbowl.vault.economy.EconomyResponse;
+import org.bukkit.entity.Player;
+import org.bukkit.plugin.Plugin;
+import org.bukkit.plugin.RegisteredServiceProvider;
+import org.bukkit.plugin.ServicePriority;
+import org.bukkit.plugin.ServicesManager;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.util.logging.Logger;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyDouble;
+import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+public class VaultFinanceTest {
+
+    private ServicesManager services;
+    private Logger log;
+    private VaultFinance subject;
+
+    @Before
+    public void setup() {
+        services = mock(ServicesManager.class);
+        log = mock(Logger.class);
+
+        subject = new VaultFinance(services, log);
+    }
+
+    @Test
+    public void looksUpEconomyFromServicesManager() {
+        Player player = mock(Player.class);
+        when(player.getName()).thenReturn("Test Subject 287");
+
+        subject.getBalance(player);
+
+        verify(services).getRegistration(Economy.class);
+    }
+
+    @Test
+    public void logsErrorIfNoEconomyFound() {
+        Player player = mock(Player.class);
+        when(player.getName()).thenReturn("Test Subject 287");
+        when(services.getRegistration(Economy.class)).thenReturn(null);
+
+        subject.getBalance(player);
+
+        verify(log).severe(anyString());
+    }
+
+    @Test
+    public void initializationIsRepeatedIfEconomyIsNotFound() {
+        Player player = mock(Player.class);
+        when(player.getName()).thenReturn("Test Subject 287");
+        when(services.getRegistration(Economy.class)).thenReturn(null);
+
+        subject.getBalance(player);
+        subject.getBalance(player);
+        subject.getBalance(player);
+
+        verify(services, times(3)).getRegistration(Economy.class);
+    }
+
+    @Test
+    public void initializationIsIdempotentIfEconomyIsFound() {
+        Player player = mock(Player.class);
+        Economy economy = mock(Economy.class);
+        RegisteredServiceProvider<Economy> provider = createProvider(economy);
+        when(services.getRegistration(Economy.class)).thenReturn(provider);
+
+        subject.getBalance(player);
+
+        verify(services, times(1)).getRegistration(Economy.class);
+    }
+
+    @Test
+    public void delegatesGetBalanceToEconomyWithGivenPlayer() {
+        Player player = mock(Player.class);
+        Economy economy = mock(Economy.class);
+        RegisteredServiceProvider<Economy> provider = createProvider(economy);
+        when(services.getRegistration(Economy.class)).thenReturn(provider);
+
+        subject.getBalance(player);
+
+        verify(economy).getBalance(player);
+    }
+
+    @Test
+    public void delegatesDepositToEconomyWithGivenPlayerAndAmount() {
+        Player player = mock(Player.class);
+        double amount = 1337;
+        Economy economy = mock(Economy.class);
+        EconomyResponse res = new EconomyResponse(0, 0, EconomyResponse.ResponseType.SUCCESS, null);
+        RegisteredServiceProvider<Economy> provider = createProvider(economy);
+        when(services.getRegistration(Economy.class)).thenReturn(provider);
+        when(economy.depositPlayer(any(Player.class), anyDouble())).thenReturn(res);
+
+        subject.deposit(player, amount);
+
+        verify(economy).depositPlayer(player, amount);
+    }
+
+    @Test
+    public void delegatesWithdrawToEconomyWithGivenPlayerAndAmount() {
+        Player player = mock(Player.class);
+        double amount = 1337;
+        Economy economy = mock(Economy.class);
+        EconomyResponse res = new EconomyResponse(0, 0, EconomyResponse.ResponseType.SUCCESS, null);
+        RegisteredServiceProvider<Economy> provider = createProvider(economy);
+        when(services.getRegistration(Economy.class)).thenReturn(provider);
+        when(economy.withdrawPlayer(any(Player.class), anyDouble())).thenReturn(res);
+
+        subject.withdraw(player, amount);
+
+        verify(economy).withdrawPlayer(player, amount);
+    }
+
+    @Test
+    public void delegatesFormatToEconomyWithGivenAmount() {
+        double amount = 1337;
+        Economy economy = mock(Economy.class);
+        RegisteredServiceProvider<Economy> provider = createProvider(economy);
+        when(services.getRegistration(Economy.class)).thenReturn(provider);
+
+        subject.format(amount);
+
+        verify(economy).format(amount);
+    }
+
+    private RegisteredServiceProvider<Economy> createProvider(Economy economy) {
+        return new RegisteredServiceProvider<>(
+            Economy.class,
+            economy,
+            ServicePriority.Normal,
+            mock(Plugin.class)
+        );
+    }
+
+}

src/test/java/com/garbagemule/MobArena/signs/HandlesSignClicksTest.java

@@ -5,6 +5,7 @@ import org.bukkit.block.Block;
 import org.bukkit.block.Chest;
 import org.bukkit.block.Sign;
 import org.bukkit.entity.Player;
+import org.bukkit.event.block.Action;
 import org.bukkit.event.player.PlayerInteractEvent;
 import org.junit.Before;
 import org.junit.Test;
@@ -50,12 +51,27 @@ public class HandlesSignClicksTest {
         verifyNoInteractions(signStore, invokesSignAction);
     }
 
+    @Test
+    public void sneakingPlayerNoFun() {
+        Block block = mock(Block.class);
+        when(block.getState()).thenReturn(mock(Sign.class));
+        Player player = mock(Player.class);
+        when(player.isSneaking()).thenReturn(true);
+        PlayerInteractEvent event = event(player, block);
+
+        subject.on(event);
+
+        verifyNoInteractions(signStore, invokesSignAction);
+    }
+
     @Test
     public void nonArenaSignNoFun() {
         Block block = mock(Block.class);
         when(block.getState()).thenReturn(mock(Sign.class));
+        Player player = mock(Player.class);
+        when(player.isSneaking()).thenReturn(false);
         when(signStore.findByLocation(any())).thenReturn(null);
-        PlayerInteractEvent event = event(null, block);
+        PlayerInteractEvent event = event(player, block);
 
         subject.on(event);
 
@@ -68,9 +84,10 @@ public class HandlesSignClicksTest {
         Block block = mock(Block.class);
         when(block.getLocation()).thenReturn(location);
         when(block.getState()).thenReturn(mock(Sign.class));
+        Player player = mock(Player.class);
+        when(player.isSneaking()).thenReturn(false);
         ArenaSign sign = new ArenaSign(location, "", "", "");
         when(signStore.findByLocation(location)).thenReturn(sign);
-        Player player = mock(Player.class);
         PlayerInteractEvent event = event(player, block);
 
         subject.on(event);
@@ -79,7 +96,8 @@ public class HandlesSignClicksTest {
     }
 
     private PlayerInteractEvent event(Player player, Block block) {
-        return new PlayerInteractEvent(player, null, null, block, null);
+        Action action = Action.LEFT_CLICK_BLOCK;
+        return new PlayerInteractEvent(player, action, null, block, null);
     }
 
 }

src/test/java/com/garbagemule/MobArena/signs/HandlesSignCreationTest.java

@@ -50,7 +50,7 @@ public class HandlesSignCreationTest {
 
     @Test
     public void noSignCreationNoAction() {
-        SignChangeEvent event = new SignChangeEvent(null, null, null);
+        SignChangeEvent event = mock(SignChangeEvent.class);
         when(creator.create(event)).thenReturn(null);
 
         subject.on(event);
@@ -61,7 +61,8 @@ public class HandlesSignCreationTest {
     @Test
     public void passesSignFromCreator() throws Exception {
         Player player = mock(Player.class);
-        SignChangeEvent event = new SignChangeEvent(null, player, null);
+        SignChangeEvent event = mock(SignChangeEvent.class);
+        when(event.getPlayer()).thenReturn(player);
         ArenaSign sign = new ArenaSign(location(), null, null, null);
         when(creator.create(event)).thenReturn(sign);
 
@@ -75,7 +76,8 @@ public class HandlesSignCreationTest {
     @Test
     public void successMessageOnCreation() {
         Player player = mock(Player.class);
-        SignChangeEvent event = new SignChangeEvent(null, player, null);
+        SignChangeEvent event = mock(SignChangeEvent.class);
+        when(event.getPlayer()).thenReturn(player);
         ArenaSign sign = new ArenaSign(location(), null, "castle", "join");
         when(creator.create(event)).thenReturn(sign);
 
@@ -87,7 +89,7 @@ public class HandlesSignCreationTest {
 
     @Test
     public void noWriteIfCreatorThrows() {
-        SignChangeEvent event = new SignChangeEvent(null, null, null);
+        SignChangeEvent event = mock(SignChangeEvent.class);
         doThrow(IllegalArgumentException.class).when(creator).create(event);
 
         subject.on(event);
@@ -98,7 +100,8 @@ public class HandlesSignCreationTest {
     @Test
     public void errorMessageIfCreatorThrows() {
         Player player = mock(Player.class);
-        SignChangeEvent event = new SignChangeEvent(null, player, null);
+        SignChangeEvent event = mock(SignChangeEvent.class);
+        when(event.getPlayer()).thenReturn(player);
         String message = "it's bad";
         doThrow(new IllegalArgumentException(message)).when(creator).create(event);
 
@@ -109,7 +112,7 @@ public class HandlesSignCreationTest {
 
     @Test
     public void noStorageIfWriterThrows() throws Exception {
-        SignChangeEvent event = new SignChangeEvent(null, null, null);
+        SignChangeEvent event = mock(SignChangeEvent.class);
         ArenaSign sign = new ArenaSign(null, null, null, null);
         when(creator.create(event)).thenReturn(sign);
         doThrow(IOException.class).when(writer).write(sign);
@@ -122,7 +125,8 @@ public class HandlesSignCreationTest {
     @Test
     public void errorMessageIfWriterThrows() throws Exception {
         Player player = mock(Player.class);
-        SignChangeEvent event = new SignChangeEvent(null, player, null);
+        SignChangeEvent event = mock(SignChangeEvent.class);
+        when(event.getPlayer()).thenReturn(player);
         ArenaSign sign = new ArenaSign(null, null, null, null);
         when(creator.create(event)).thenReturn(sign);
         IOException exception = new IOException("it's bad");

src/test/java/com/garbagemule/MobArena/signs/SignCreatorTest.java

@@ -40,7 +40,7 @@ public class SignCreatorTest {
     @Test
     public void noHeaderNoAction() {
         String[] lines = {"ma", "castle", "join", "cool-sign"};
-        SignChangeEvent event = new SignChangeEvent(null, null, lines);
+        SignChangeEvent event = event(lines, null);
 
         ArenaSign result = subject.create(event);
 
@@ -202,10 +202,12 @@ public class SignCreatorTest {
     }
 
     private SignChangeEvent event(String[] lines, Location location) {
+        SignChangeEvent event = mock(SignChangeEvent.class);
+        when(event.getLine(anyInt())).thenAnswer(invocation -> lines[invocation.getArgument(0)]);
         Block block = mock(Block.class);
         when(block.getLocation()).thenReturn(location);
-        Player player = mock(Player.class);
+        when(event.getBlock()).thenReturn(block);
-        return new SignChangeEvent(block, player, lines);
+        return event;
     }
 
 }

src/test/java/com/garbagemule/MobArena/things/ItemStackThingParserTest.java

@@ -2,9 +2,12 @@ package com.garbagemule.MobArena.things;
 
 import org.bukkit.Material;
 import org.bukkit.inventory.ItemStack;
+import org.junit.AfterClass;
 import org.junit.Before;
+import org.junit.BeforeClass;
 import org.junit.Test;
 import org.mockito.InOrder;
+import org.mockbukkit.mockbukkit.MockBukkit;
 
 import static org.hamcrest.CoreMatchers.*;
 import static org.hamcrest.MatcherAssert.*;
@@ -13,6 +16,15 @@ import static org.mockito.Mockito.*;
 public class ItemStackThingParserTest {
 
     private ItemStackThingParser subject;
+    @BeforeClass
+    public static void startServer() {
+        MockBukkit.mock();
+    }
+
+    @AfterClass
+    public static void stopServer() {
+        MockBukkit.unmock();
+    }
 
     @Before
     public void setup() {
@@ -107,7 +119,7 @@ public class ItemStackThingParserTest {
         subject.parse(input);
 
         verify(first).parse(input);
-        verifyZeroInteractions(third);
+        verifyNoInteractions(third);
     }
 
 }

src/test/java/com/garbagemule/MobArena/things/MoneyThingParserTest.java

@@ -1,23 +1,20 @@
 package com.garbagemule.MobArena.things;
 
 import com.garbagemule.MobArena.MobArena;
-import net.milkbowl.vault.economy.Economy;
+import com.garbagemule.MobArena.finance.Finance;
 import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
 
-import java.util.logging.Logger;
-
 import static org.hamcrest.CoreMatchers.*;
 import static org.hamcrest.MatcherAssert.*;
-import static org.mockito.ArgumentMatchers.*;
 import static org.mockito.Mockito.*;
 
 public class MoneyThingParserTest {
 
-    private MoneyThingParser subject;
     private MobArena plugin;
+    private MoneyThingParser subject;
 
     @Rule
     public ExpectedException exception = ExpectedException.none();
@@ -25,8 +22,7 @@ public class MoneyThingParserTest {
     @Before
     public void setup() {
         plugin = mock(MobArena.class);
-        Economy economy = mock(Economy.class);
+        when(plugin.getFinance()).thenReturn(mock(Finance.class));
-        when(plugin.getEconomy()).thenReturn(economy);
 
         subject = new MoneyThingParser(plugin);
     }
@@ -52,17 +48,6 @@ public class MoneyThingParserTest {
         assertThat(result, not(nullValue()));
     }
 
-    @Test
-    public void nullEconomyNullMoney() {
-        Logger logger = mock(Logger.class);
-        when(plugin.getEconomy()).thenReturn(null);
-        when(plugin.getLogger()).thenReturn(logger);
-
-        subject.parse("$500");
-
-        verify(logger).severe(anyString());
-    }
-
     @Test
     public void numberFormatForNaughtyValues() {
         exception.expect(NumberFormatException.class);

src/test/java/com/garbagemule/MobArena/things/ThingManagerTest.java

@@ -70,7 +70,7 @@ public class ThingManagerTest {
 
         verify(first).parse("thing");
         verify(second).parse("thing");
-        verifyZeroInteractions(third);
+        verifyNoInteractions(third);
     }
 
     @Test