Apply Style Changes From Code Review

Co-authored-by: ManInMyVan <113963219+ManInMyVan@users.noreply.github.com>

.github/workflows/codeql-analysis.yml

@@ -39,11 +39,11 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       # Initializes the CodeQL tools for scanning.
       - name: Initialize CodeQL
-        uses: github/codeql-action/init@v1
+        uses: github/codeql-action/init@v3
         with:
           languages: ${{ matrix.language }}
           # If you wish to specify custom queries, you can do so here or in a config file.
@@ -54,7 +54,7 @@ jobs:
       # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
       # If this step fails, then you should remove it and run the build manually (see below)
       - name: Autobuild
-        uses: github/codeql-action/autobuild@v1
+        uses: github/codeql-action/autobuild@v3
 
       # ℹ️ Command-line programs to run using the OS shell.
       # 📚 https://git.io/JvXDl
@@ -68,4 +68,4 @@ jobs:
       #   make release
 
       - name: Perform CodeQL Analysis
-        uses: github/codeql-action/analyze@v1
+        uses: github/codeql-action/analyze@v3

.github/workflows/gradle-publish.yml

@@ -19,9 +19,9 @@ jobs:
       packages: write
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up JDK 17
-      uses: actions/setup-java@v3
+      uses: actions/setup-java@v4
       with:
         java-version: '17'
         distribution: 'temurin'
@@ -29,10 +29,10 @@ jobs:
         settings-path: ${{ github.workspace }} # location for the settings.xml file
 
     - name: Build with Gradle
-      uses: gradle/gradle-build-action@67421db6bd0bf253fb4bd25b31ebb98943c375e1
+      uses: gradle/actions/setup-gradle@v3
       with:
         arguments: build
     - name: Upload a Build Artifact
-      uses: actions/upload-artifact@v3.1.0
+      uses: actions/upload-artifact@v4
       with:
         path: /home/runner/work/Grim/Grim/build/libs/**.jar

README.md

@@ -7,7 +7,7 @@ GrimAC is an open source Minecraft anticheat designed for 1.21 and supports 1.8-
 ### Compiling through terminal/command prompt
 1. git clone https://github.com/GrimAnticheat/Grim.git (or click the green code button, download ZIP, then unzip it.)
 2. cd Grim
-3. gradlew build
+3. ./gradlew build
 4. The final jar is located in build/libs
 
 ### API Information

build.gradle.kts

@@ -6,13 +6,39 @@ plugins {
     id("com.github.johnrengelman.shadow") version "8.1.1"
     id("io.freefair.lombok") version "8.6"
     id("net.minecrell.plugin-yml.bukkit") version "0.6.0"
+    id("com.diffplug.spotless") version "6.25.0"
+}
+
+spotless {
+    java {
+        endWithNewline()
+        indentWithSpaces(4)
+        removeUnusedImports()
+        trimTrailingWhitespace()
+        targetExclude("build/generated/**/*")
+    }
+
+    kotlinGradle {
+        endWithNewline()
+        indentWithSpaces(4)
+        trimTrailingWhitespace()
+    }
 }
 
 group = "ac.grim.grimac"
-version = "2.3.67"
+version = "2.3.68"
 description = "Libre simulation anticheat designed for 1.21 with 1.8-1.21 support, powered by PacketEvents 2.0."
-java.sourceCompatibility = JavaVersion.VERSION_1_8
-java.targetCompatibility = JavaVersion.VERSION_1_8
+
+java {
+    toolchain.languageVersion.set(JavaLanguageVersion.of(17))
+}
+
+// Set to false for debug builds
+// You cannot live reload classes if the jar relocates dependencies
+// Checks Project properties -> environment variable -> defaults true
+val relocate: Boolean = project.findProperty("relocate")?.toString()?.toBoolean()
+    ?: System.getenv("RELOCATE_JAR")?.toBoolean()
+    ?: true
 
 repositories {
     mavenLocal()
@@ -29,24 +55,26 @@ repositories {
     maven("https://repo.opencollab.dev/maven-releases/") // Cumulus (for Floodgate)
     maven("https://repo.codemc.io/repository/maven-releases/") // PacketEvents
     maven("https://repo.codemc.io/repository/maven-snapshots/")
+    maven("https://s01.oss.sonatype.org/content/repositories/snapshots/")
     mavenCentral()
     // FastUtil, Discord-Webhooks
 }
 
 dependencies {
-    implementation("com.github.retrooper:packetevents-spigot:2.5.0-SNAPSHOT")
+    implementation("com.github.retrooper:packetevents-spigot:2.7.0-SNAPSHOT")
     implementation("co.aikar:acf-paper:0.5.1-SNAPSHOT")
     implementation("club.minnced:discord-webhooks:0.8.0") // Newer versions include kotlin-stdlib, which leads to incompatibility with plugins that use Kotlin
-    implementation("it.unimi.dsi:fastutil:8.5.13")
+    implementation("it.unimi.dsi:fastutil:8.5.15")
     implementation("github.scarsz:configuralize:1.4.0")
 
-    implementation("com.github.grimanticheat:grimapi:1193c4fa41")
-    // Used for local testing: implementation("ac.grim.grimac:grimapi:1.0")
+    //implementation("com.github.grimanticheat:grimapi:1193c4fa41")
+    // Used for local testing: implementation("ac.grim.grimac:GRIMAPI:1.0")
+    implementation("com.github.grimanticheat:grimapi:fc5634e444")
 
     implementation("org.jetbrains:annotations:24.1.0")
     compileOnly("org.geysermc.floodgate:api:2.0-SNAPSHOT")
     compileOnly("org.spigotmc:spigot-api:1.18.2-R0.1-SNAPSHOT")
-    compileOnly("com.viaversion:viaversion-api:4.9.4-SNAPSHOT")
+    compileOnly("com.viaversion:viaversion-api:5.0.4-SNAPSHOT")
     //
     compileOnly("io.netty:netty-all:4.1.85.Final")
 }
@@ -55,6 +83,7 @@ bukkit {
     name = "GrimAC"
     author = "GrimAC"
     main = "ac.grim.grimac.GrimAC"
+    website = "https://grim.ac/"
     apiVersion = "1.13"
     foliaSupported = true
 
@@ -115,11 +144,22 @@ bukkit {
             description = "Exempt from all checks"
             default = Permission.Default.FALSE
         }
+
+        register("grim.verbose") {
+            description = "Receive verbose alerts for violations. Requires grim.alerts"
+            default = Permission.Default.OP
+        }
+
+        register("grim.verbose.enable-on-join") {
+            description = "Enable verbose alerts on join. Requires grim.alerts and grim.alerts.enable-on-join"
+            default = Permission.Default.FALSE
+        }
     }
 }
 
 tasks.build {
     dependsOn(tasks.shadowJar)
+    dependsOn(tasks.spotlessApply)
 }
 
 tasks.withType<JavaCompile> {
@@ -133,21 +173,23 @@ publishing.publications.create<MavenPublication>("maven") {
 tasks.shadowJar {
     minimize()
     archiveFileName.set("${project.name}-${project.version}.jar")
-    relocate("io.github.retrooper.packetevents", "ac.grim.grimac.shaded.io.github.retrooper.packetevents")
-    relocate("com.github.retrooper.packetevents", "ac.grim.grimac.shaded.com.github.retrooper.packetevents")
-    relocate("co.aikar.commands", "ac.grim.grimac.shaded.acf")
-    relocate("co.aikar.locale", "ac.grim.grimac.shaded.locale")
-    relocate("club.minnced", "ac.grim.grimac.shaded.discord-webhooks")
-    relocate("github.scarsz.configuralize", "ac.grim.grimac.shaded.configuralize")
-    relocate("com.github.puregero", "ac.grim.grimac.shaded.com.github.puregero")
-    relocate("com.google.code.gson", "ac.grim.grimac.shaded.gson")
-    relocate("alexh", "ac.grim.grimac.shaded.maps")
-    relocate("it.unimi.dsi.fastutil", "ac.grim.grimac.shaded.fastutil")
-    relocate("net.kyori", "ac.grim.grimac.shaded.kyori")
-    relocate("okhttp3", "ac.grim.grimac.shaded.okhttp3")
-    relocate("okio", "ac.grim.grimac.shaded.okio")
-    relocate("org.yaml.snakeyaml", "ac.grim.grimac.shaded.snakeyaml")
-    relocate("org.json", "ac.grim.grimac.shaded.json")
-    relocate("org.intellij", "ac.grim.grimac.shaded.intellij")
-    relocate("org.jetbrains", "ac.grim.grimac.shaded.jetbrains")
+    if (relocate) {
+        relocate("io.github.retrooper.packetevents", "ac.grim.grimac.shaded.io.github.retrooper.packetevents")
+        relocate("com.github.retrooper.packetevents", "ac.grim.grimac.shaded.com.github.retrooper.packetevents")
+        relocate("co.aikar.commands", "ac.grim.grimac.shaded.acf")
+        relocate("co.aikar.locale", "ac.grim.grimac.shaded.locale")
+        relocate("club.minnced", "ac.grim.grimac.shaded.discord-webhooks")
+        relocate("github.scarsz.configuralize", "ac.grim.grimac.shaded.configuralize")
+        relocate("com.github.puregero", "ac.grim.grimac.shaded.com.github.puregero")
+        relocate("com.google.code.gson", "ac.grim.grimac.shaded.gson")
+        relocate("alexh", "ac.grim.grimac.shaded.maps")
+        relocate("it.unimi.dsi.fastutil", "ac.grim.grimac.shaded.fastutil")
+        relocate("net.kyori", "ac.grim.grimac.shaded.kyori")
+        relocate("okhttp3", "ac.grim.grimac.shaded.okhttp3")
+        relocate("okio", "ac.grim.grimac.shaded.okio")
+        relocate("org.yaml.snakeyaml", "ac.grim.grimac.shaded.snakeyaml")
+        relocate("org.json", "ac.grim.grimac.shaded.json")
+        relocate("org.intellij", "ac.grim.grimac.shaded.intellij")
+        relocate("org.jetbrains", "ac.grim.grimac.shaded.jetbrains")
+    }
 }

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.9-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.10.2-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME

src/main/java/ac/grim/grimac/GrimAPI.java

@@ -1,17 +1,16 @@
 package ac.grim.grimac;
 
-import ac.grim.grimac.api.GrimAbstractAPI;
 import ac.grim.grimac.manager.*;
+import ac.grim.grimac.manager.config.BaseConfigManager;
 import ac.grim.grimac.utils.anticheat.PlayerDataManager;
 import lombok.Getter;
-import org.bukkit.Bukkit;
-import org.bukkit.plugin.ServicePriority;
 import org.bukkit.plugin.java.JavaPlugin;
 
 @Getter
 public enum GrimAPI {
     INSTANCE;
 
+    private final BaseConfigManager configManager = new BaseConfigManager();
     private final AlertManagerImpl alertManager = new AlertManagerImpl();
     private final SpectateManager spectateManager = new SpectateManager();
     private final DiscordManager discordManager = new DiscordManager();
@@ -19,12 +18,10 @@ public enum GrimAPI {
     private final TickManager tickManager = new TickManager();
     private final GrimExternalAPI externalAPI = new GrimExternalAPI(this);
     private InitManager initManager;
-    private ConfigManager configManager;
     private JavaPlugin plugin;
 
     public void load(final JavaPlugin plugin) {
         this.plugin = plugin;
-        this.configManager = new ConfigManager();
         initManager = new InitManager();
         initManager.load();
     }
@@ -32,7 +29,6 @@ public enum GrimAPI {
     public void start(final JavaPlugin plugin) {
         this.plugin = plugin;
         initManager.start();
-        Bukkit.getServicesManager().register(GrimAbstractAPI.class, externalAPI, plugin, ServicePriority.Normal);
     }
 
     public void stop(final JavaPlugin plugin) {

src/main/java/ac/grim/grimac/GrimExternalAPI.java

@@ -1,25 +1,34 @@
 package ac.grim.grimac;
 
-import ac.grim.grimac.api.AbstractCheck;
 import ac.grim.grimac.api.GrimAbstractAPI;
 import ac.grim.grimac.api.GrimUser;
 import ac.grim.grimac.api.alerts.AlertManager;
+import ac.grim.grimac.api.config.ConfigManager;
+import ac.grim.grimac.api.events.GrimReloadEvent;
+import ac.grim.grimac.manager.config.ConfigManagerFileImpl;
 import ac.grim.grimac.manager.init.Initable;
 import ac.grim.grimac.player.GrimPlayer;
+import ac.grim.grimac.utils.anticheat.LogUtil;
+import ac.grim.grimac.utils.common.ConfigReloadObserver;
 import com.github.retrooper.packetevents.netty.channel.ChannelHelper;
 import io.github.retrooper.packetevents.util.SpigotReflectionUtil;
+import io.github.retrooper.packetevents.util.folia.FoliaScheduler;
 import lombok.Getter;
+import org.bukkit.Bukkit;
 import org.bukkit.ChatColor;
 import org.bukkit.entity.Player;
 import org.bukkit.plugin.PluginDescriptionFile;
+import org.bukkit.plugin.ServicePriority;
 import org.jetbrains.annotations.Nullable;
 
 import java.util.Map;
+import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.function.Function;
 
 //This is used for grim's external API. It has its own class just for organization.
-public class GrimExternalAPI implements GrimAbstractAPI, Initable {
+
+public class GrimExternalAPI implements GrimAbstractAPI, ConfigReloadObserver, Initable {
 
     private final GrimAPI api;
 
@@ -41,7 +50,8 @@ public class GrimExternalAPI implements GrimAbstractAPI, Initable {
     @Getter
     private final Map<String, Function<GrimUser, String>> variableReplacements = new ConcurrentHashMap<>();
 
-    @Getter private final Map<String, String> staticReplacements = new ConcurrentHashMap<>();
+    @Getter
+    private final Map<String, String> staticReplacements = new ConcurrentHashMap<>();
 
     public String replaceVariables(GrimUser user, String content, boolean colors) {
         if (colors) content = ChatColor.translateAlternateColorCodes('&', content);
@@ -56,12 +66,20 @@ public class GrimExternalAPI implements GrimAbstractAPI, Initable {
 
     @Override
     public void registerVariable(String string, Function<GrimUser, String> replacement) {
-        variableReplacements.put(string, replacement);
+        if (replacement == null) {
+            variableReplacements.remove(string);
+        } else {
+            variableReplacements.put(string, replacement);
+        }
     }
 
     @Override
     public void registerVariable(String variable, String replacement) {
-        staticReplacements.put(variable, replacement);
+        if (replacement == null) {
+            staticReplacements.remove(variable);
+        } else {
+            staticReplacements.put(variable, replacement);
+        }
     }
 
     @Override
@@ -70,34 +88,20 @@ public class GrimExternalAPI implements GrimAbstractAPI, Initable {
         return description.getVersion();
     }
 
+    private final Map<String, Function<Object, Object>> functions = new ConcurrentHashMap<>();
+
     @Override
     public void registerFunction(String key, Function<Object, Object> function) {
-
+        if (function == null) {
+            functions.remove(key);
+        } else {
+            functions.put(key, function);
+        }
     }
 
     @Override
     public Function<Object, Object> getFunction(String key) {
-        return null;
-    }
-
-    @Override
-    public void reload() {
-        GrimAPI.INSTANCE.getConfigManager().reload();
-        //Reload checks for all players
-        for (GrimPlayer grimPlayer : GrimAPI.INSTANCE.getPlayerDataManager().getEntries()) {
-            ChannelHelper.runInEventLoop(grimPlayer.user.getChannel(), () -> {
-                grimPlayer.onReload();
-                grimPlayer.updatePermissions();
-                grimPlayer.punishmentManager.reload();
-                for (AbstractCheck value : grimPlayer.checkManager.allChecks.values()) {
-                    value.reload();
-                }
-            });
-        }
-        //Restart
-        GrimAPI.INSTANCE.getDiscordManager().start();
-        GrimAPI.INSTANCE.getSpectateManager().start();
-        GrimAPI.INSTANCE.getExternalAPI().start();
+        return functions.get(key);
     }
 
     @Override
@@ -106,16 +110,106 @@ public class GrimExternalAPI implements GrimAbstractAPI, Initable {
     }
 
     @Override
-    public void start() {
-        variableReplacements.put("%player%", GrimUser::getName);
-        variableReplacements.put("%uuid%", user -> user.getUniqueId().toString());
-        variableReplacements.put("%ping%", user -> user.getTransactionPing() + "");
-        variableReplacements.put("%brand%", GrimUser::getBrand);
-        variableReplacements.put("%h_sensitivity%", user -> ((int) Math.round(user.getHorizontalSensitivity() * 200)) + "");
-        variableReplacements.put("%v_sensitivity%", user -> ((int) Math.round(user.getVerticalSensitivity() * 200)) + "");
-        variableReplacements.put("%fast_math%", user -> !user.isVanillaMath() + "");
-        variableReplacements.put("%tps%", user -> String.format("%.2f", SpigotReflectionUtil.getTPS()));
-        variableReplacements.put("%version%", GrimUser::getVersionName);
-        variableReplacements.put("%prefix%", user -> ChatColor.translateAlternateColorCodes('&', GrimAPI.INSTANCE.getConfigManager().getConfig().getStringElse("prefix", "&bGrim &8»")));
+    public ConfigManager getConfigManager() {
+        return configManager;
     }
+
+    private ConfigManager configManager = null;
+    private final ConfigManagerFileImpl configManagerFile = new ConfigManagerFileImpl();
+    private boolean started = false;
+
+    // on load, load the config & register the service
+    public void load() {
+        reload(configManagerFile);
+        Bukkit.getServicesManager().register(GrimAbstractAPI.class, this, GrimAPI.INSTANCE.getPlugin(), ServicePriority.Normal);
+    }
+
+    // handles any config loading that's needed to be done after load
+    @Override
+    public void start() {
+        started = true;
+        try {
+            GrimAPI.INSTANCE.getConfigManager().start();
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Override
+    public void reload(ConfigManager config) {
+        if (config.isLoadedAsync() && started) {
+            FoliaScheduler.getAsyncScheduler().runNow(GrimAPI.INSTANCE.getPlugin(),
+                    o -> successfulReload(config));
+        } else {
+            successfulReload(config);
+        }
+    }
+
+    @Override
+    public CompletableFuture<Boolean> reloadAsync(ConfigManager config) {
+        if (config.isLoadedAsync() && started) {
+            CompletableFuture<Boolean> future = new CompletableFuture<>();
+            FoliaScheduler.getAsyncScheduler().runNow(GrimAPI.INSTANCE.getPlugin(),
+                    o -> future.complete(successfulReload(config)));
+            return future;
+        }
+        return CompletableFuture.completedFuture(successfulReload(config));
+    }
+
+    private boolean successfulReload(ConfigManager config) {
+        try {
+            config.reload();
+            GrimAPI.INSTANCE.getConfigManager().load(config);
+            if (started) GrimAPI.INSTANCE.getConfigManager().start();
+            onReload(config);
+            if (started) FoliaScheduler.getAsyncScheduler().runNow(GrimAPI.INSTANCE.getPlugin(),
+                    o -> Bukkit.getPluginManager().callEvent(new GrimReloadEvent(true)));
+            return true;
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+        if (started) FoliaScheduler.getAsyncScheduler().runNow(GrimAPI.INSTANCE.getPlugin(),
+                o -> Bukkit.getPluginManager().callEvent(new GrimReloadEvent(false)));
+        return false;
+    }
+
+    @Override
+    public void onReload(ConfigManager newConfig) {
+        if (newConfig == null) {
+            LogUtil.warn("ConfigManager not set. Using default config file manager.");
+            configManager = configManagerFile;
+        } else {
+            configManager = newConfig;
+        }
+        // Update variables
+        updateVariables();
+        // Restart
+        GrimAPI.INSTANCE.getDiscordManager().start();
+        GrimAPI.INSTANCE.getSpectateManager().start();
+        // Don't reload players if the plugin hasn't started yet
+        if (!started) return;
+        // Reload checks for all players
+        for (GrimPlayer grimPlayer : GrimAPI.INSTANCE.getPlayerDataManager().getEntries()) {
+            ChannelHelper.runInEventLoop(grimPlayer.user.getChannel(), () -> {
+                grimPlayer.updatePermissions();
+                grimPlayer.reload(configManager);
+            });
+        }
+    }
+
+    private void updateVariables() {
+        variableReplacements.putIfAbsent("%player%", GrimUser::getName);
+        variableReplacements.putIfAbsent("%uuid%", user -> user.getUniqueId().toString());
+        variableReplacements.putIfAbsent("%ping%", user -> user.getTransactionPing() + "");
+        variableReplacements.putIfAbsent("%brand%", GrimUser::getBrand);
+        variableReplacements.putIfAbsent("%h_sensitivity%", user -> ((int) Math.round(user.getHorizontalSensitivity() * 200)) + "");
+        variableReplacements.putIfAbsent("%v_sensitivity%", user -> ((int) Math.round(user.getVerticalSensitivity() * 200)) + "");
+        variableReplacements.putIfAbsent("%fast_math%", user -> !user.isVanillaMath() + "");
+        variableReplacements.putIfAbsent("%tps%", user -> String.format("%.2f", SpigotReflectionUtil.getTPS()));
+        variableReplacements.putIfAbsent("%version%", GrimUser::getVersionName);
+        // static variables
+        staticReplacements.putIfAbsent("%prefix%", ChatColor.translateAlternateColorCodes('&', GrimAPI.INSTANCE.getConfigManager().getPrefix()));
+        staticReplacements.putIfAbsent("%grim_version%", getGrimVersion());
+    }
+
 }

src/main/java/ac/grim/grimac/checks/Check.java

@@ -2,18 +2,22 @@ package ac.grim.grimac.checks;
 
 import ac.grim.grimac.GrimAPI;
 import ac.grim.grimac.api.AbstractCheck;
+import ac.grim.grimac.api.config.ConfigManager;
 import ac.grim.grimac.api.events.FlagEvent;
 import ac.grim.grimac.player.GrimPlayer;
+import ac.grim.grimac.utils.common.ConfigReloadObserver;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.protocol.packettype.PacketTypeCommon;
-import github.scarsz.configuralize.DynamicConfig;
+import com.github.retrooper.packetevents.protocol.player.ClientVersion;
+import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerFlying;
+import io.github.retrooper.packetevents.util.folia.FoliaScheduler;
 import lombok.Getter;
 import lombok.Setter;
 import org.bukkit.Bukkit;
 
 // Class from https://github.com/Tecnio/AntiCheatBase/blob/master/src/main/java/me/tecnio/anticheat/check/Check.java
 @Getter
-public class Check implements AbstractCheck {
+public class Check implements AbstractCheck, ConfigReloadObserver {
     protected final GrimPlayer player;
 
     public double violations;
@@ -23,11 +27,13 @@ public class Check implements AbstractCheck {
     private String checkName;
     private String configName;
     private String alternativeName;
+    private String displayName;
     private String description;
 
     private boolean experimental;
     @Setter
     private boolean isEnabled;
+    private boolean exempted;
 
     @Override
     public boolean isExperimental() {
@@ -50,13 +56,21 @@ public class Check implements AbstractCheck {
             this.alternativeName = checkData.alternativeName();
             this.experimental = checkData.experimental();
             this.description = checkData.description();
+            this.displayName = this.checkName;
         }
-
+        //
         reload();
     }
 
     public boolean shouldModifyPackets() {
-        return isEnabled && !player.disableGrim && !player.noModifyPacketPermission;
+        return isEnabled && !player.disableGrim && !player.noModifyPacketPermission && !exempted;
+    }
+
+    public void updateExempted() {
+        if (player.bukkitPlayer == null || checkName == null) return;
+        FoliaScheduler.getEntityScheduler().run(player.bukkitPlayer, GrimAPI.INSTANCE.getPlugin(),
+                t -> exempted = player.bukkitPlayer.hasPermission("grim.exempt." + checkName.toLowerCase()),
+                () -> {});
     }
 
     public final boolean flagAndAlert(String verbose) {
@@ -72,7 +86,7 @@ public class Check implements AbstractCheck {
     }
 
     public final boolean flag() {
-        if (player.disableGrim || (experimental && !GrimAPI.INSTANCE.getConfigManager().isExperimentalChecks()))
+        if (player.disableGrim || (experimental && !player.isExperimentalChecks()) || exempted)
             return false; // Avoid calling event if disabled
 
         FlagEvent event = new FlagEvent(player, this);
@@ -98,21 +112,26 @@ public class Check implements AbstractCheck {
         violations = Math.max(0, violations - decay);
     }
 
-    public void reload() {
-        decay = getConfig().getDoubleElse(configName + ".decay", decay);
-        setbackVL = getConfig().getDoubleElse(configName + ".setbackvl", setbackVL);
+    @Override
+    public void reload(ConfigManager configuration) {
+        decay = configuration.getDoubleElse(configName + ".decay", decay);
+        setbackVL = configuration.getDoubleElse(configName + ".setbackvl", setbackVL);
+        displayName = configuration.getStringElse(configName + ".displayname", checkName);
 
         if (setbackVL == -1) setbackVL = Double.MAX_VALUE;
+        updateExempted();
+        onReload(configuration);
+    }
+
+    @Override
+    public void onReload(ConfigManager config) {
+
     }
 
     public boolean alert(String verbose) {
         return player.punishmentManager.handleAlert(player, verbose, this);
     }
 
-    public DynamicConfig getConfig() {
-        return GrimAPI.INSTANCE.getConfigManager().getConfig();
-    }
-
     public boolean setbackIfAboveSetbackVL() {
         if (getViolations() > setbackVL) {
             return player.getSetbackTeleportUtil().executeViolationSetback();
@@ -133,5 +152,42 @@ public class Check implements AbstractCheck {
                 packetType == PacketType.Play.Client.WINDOW_CONFIRMATION;
     }
 
-}
+    public boolean isFlying(PacketTypeCommon packetType) {
+        return WrapperPlayClientPlayerFlying.isFlying(packetType);
+    }
 
+    public boolean isUpdate(PacketTypeCommon packetType) {
+        return isFlying(packetType)
+                || packetType == PacketType.Play.Client.CLIENT_TICK_END
+                || isTransaction(packetType);
+    }
+
+    public boolean isTickPacket(PacketTypeCommon packetType) {
+        if (isTickPacketIncludingNonMovement(packetType)) {
+            if (isFlying(packetType)) {
+                return !player.packetStateData.lastPacketWasTeleport && !player.packetStateData.lastPacketWasOnePointSeventeenDuplicate;
+            }
+            return true;
+        }
+        return false;
+    }
+
+    public boolean isTickPacketIncludingNonMovement(PacketTypeCommon packetType) {
+        // On 1.21.2+ fall back to the TICK_END packet IF the player did not send a movement packet for their tick
+        // TickTimer checks to see if player did not send a tick end packet before new flying packet is sent
+        if (player.getClientVersion().isNewerThanOrEquals(ClientVersion.V_1_21_2)
+                && !player.packetStateData.didSendMovementBeforeTickEnd) {
+            if (packetType == PacketType.Play.Client.CLIENT_TICK_END) {
+                return true;
+            }
+        }
+
+        return isFlying(packetType);
+    }
+
+    @Override
+    public void reload() {
+        reload(GrimAPI.INSTANCE.getConfigManager().getConfig());
+    }
+
+}

src/main/java/ac/grim/grimac/checks/impl/aim/AimModulo360.java

@@ -11,7 +11,8 @@ import ac.grim.grimac.utils.anticheat.update.RotationUpdate;
 // It works on clients who % 360 their rotation.
 @CheckData(name = "AimModulo360", decay = 0.005)
 public class AimModulo360 extends Check implements RotationCheck {
-    float lastDeltaYaw;
+
+    private float lastDeltaYaw;
 
     public AimModulo360(GrimPlayer playerData) {
         super(playerData);
@@ -19,12 +20,17 @@ public class AimModulo360 extends Check implements RotationCheck {
 
     @Override
     public void process(final RotationUpdate rotationUpdate) {
-        lastDeltaYaw = rotationUpdate.getDeltaXRot();
-        if (player.packetStateData.lastPacketWasTeleport) return;
+        if (player.packetStateData.lastPacketWasTeleport) {
+            lastDeltaYaw = rotationUpdate.getDeltaXRot();
+            return;
+        }
+
         if (player.xRot < 360 && player.xRot > -360 && Math.abs(rotationUpdate.getDeltaXRot()) > 320 && Math.abs(lastDeltaYaw) < 30) {
             flagAndAlert();
         } else {
             reward();
         }
+
+        lastDeltaYaw = rotationUpdate.getDeltaXRot();
     }
 }

src/main/java/ac/grim/grimac/checks/impl/aim/processor/AimProcessor.java

@@ -59,15 +59,15 @@ public class AimProcessor extends Check implements RotationCheck {
 
         if (this.xRotMode.size() > SIGNIFICANT_SAMPLES_THRESHOLD) {
             Pair<Double, Integer> modeX = this.xRotMode.getMode();
-            if (modeX.getSecond() > SIGNIFICANT_SAMPLES_THRESHOLD) {
-                this.modeX = modeX.getFirst();
+            if (modeX.second() > SIGNIFICANT_SAMPLES_THRESHOLD) {
+                this.modeX = modeX.first();
                 this.sensitivityX = convertToSensitivity(this.modeX);
             }
         }
         if (this.yRotMode.size() > SIGNIFICANT_SAMPLES_THRESHOLD) {
             Pair<Double, Integer> modeY = this.yRotMode.getMode();
-            if (modeY.getSecond() > SIGNIFICANT_SAMPLES_THRESHOLD) {
-                this.modeY = modeY.getFirst();
+            if (modeY.second() > SIGNIFICANT_SAMPLES_THRESHOLD) {
+                this.modeY = modeY.first();
                 this.sensitivityY = convertToSensitivity(this.modeY);
             }
         }
@@ -81,4 +81,4 @@ public class AimProcessor extends Check implements RotationCheck {
         double var9 = Math.cbrt(var11);
         return (var9 - 0.2f) / 0.6f;
     }
-}
+}

src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsA.java

@@ -8,7 +8,7 @@ import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientHeldItemChange;
 
-@CheckData(name = "BadPacketsA")
+@CheckData(name = "BadPacketsA", description = "Sent duplicate slot id")
 public class BadPacketsA extends Check implements PacketCheck {
     int lastSlot = -1;
 

src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsB.java

@@ -8,7 +8,7 @@ import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientSteerVehicle;
 
-@CheckData(name = "BadPacketsB")
+@CheckData(name = "BadPacketsB", description = "Sent impossible steer vehicle packet")
 public class BadPacketsB extends Check implements PacketCheck {
     public BadPacketsB(GrimPlayer player) {
         super(player);

src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsC.java

@@ -8,7 +8,7 @@ import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientInteractEntity;
 
-@CheckData(name = "BadPacketsC")
+@CheckData(name = "BadPacketsC", description = "Interacted with self")
 public class BadPacketsC extends Check implements PacketCheck {
     public BadPacketsC(GrimPlayer player) {
         super(player);

src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsE.java

@@ -6,6 +6,7 @@ import ac.grim.grimac.checks.type.PacketCheck;
 import ac.grim.grimac.player.GrimPlayer;
 import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
+import com.github.retrooper.packetevents.protocol.player.ClientVersion;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerFlying;
 
 @CheckData(name = "BadPacketsE")
@@ -23,10 +24,12 @@ public class BadPacketsE extends Check implements PacketCheck {
             noReminderTicks = 0;
         } else if (WrapperPlayClientPlayerFlying.isFlying(event.getPacketType())) {
             noReminderTicks++;
-        } else if (event.getPacketType() == PacketType.Play.Client.STEER_VEHICLE) {
+        } else if (event.getPacketType() == PacketType.Play.Client.STEER_VEHICLE
+                || (player.getClientVersion().isNewerThanOrEquals(ClientVersion.V_1_21_2) && player.compensatedEntities.getSelf().inVehicle())) {
             noReminderTicks = 0; // Exempt vehicles
         }
 
+
         if (noReminderTicks > 20) {
             flagAndAlert("ticks=" + noReminderTicks); // ban?  I don't know how this would false
         }

src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsF.java

@@ -8,7 +8,7 @@ import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientEntityAction;
 
-@CheckData(name = "BadPacketsF")
+@CheckData(name = "BadPacketsF", description = "Sent duplicate sprinting status")
 public class BadPacketsF extends Check implements PacketCheck {
     public boolean lastSprinting;
     public boolean exemptNext = true; // Support 1.14+ clients starting on either true or false sprinting, we don't know

src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsG.java

@@ -8,10 +8,9 @@ import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientEntityAction;
 
-@CheckData(name = "BadPacketsG")
+@CheckData(name = "BadPacketsG", description = "Sent duplicate sneaking status")
 public class BadPacketsG extends Check implements PacketCheck {
-    boolean wasTeleport;
-    boolean lastSneaking;
+    private boolean lastSneaking, respawn;
 
     public BadPacketsG(GrimPlayer player) {
         super(player);
@@ -19,13 +18,12 @@ public class BadPacketsG extends Check implements PacketCheck {
 
     @Override
     public void onPacketReceive(PacketReceiveEvent event) {
-        wasTeleport = player.packetStateData.lastPacketWasTeleport || wasTeleport;
-
         if (event.getPacketType() == PacketType.Play.Client.ENTITY_ACTION) {
             WrapperPlayClientEntityAction packet = new WrapperPlayClientEntityAction(event);
 
             if (packet.getAction() == WrapperPlayClientEntityAction.Action.START_SNEAKING) {
-                if (lastSneaking && !wasTeleport) {
+                // The player may send two START_SNEAKING packets if they respawned
+                if (lastSneaking && !respawn) {
                     if (flagAndAlert("state=true") && shouldModifyPackets()) {
                         event.setCancelled(true);
                         player.onPacketCancel();
@@ -33,8 +31,9 @@ public class BadPacketsG extends Check implements PacketCheck {
                 } else {
                     lastSneaking = true;
                 }
+                respawn = false;
             } else if (packet.getAction() == WrapperPlayClientEntityAction.Action.STOP_SNEAKING) {
-                if (!lastSneaking && !wasTeleport) {
+                if (!lastSneaking && !respawn) {
                     if (flagAndAlert("state=false") && shouldModifyPackets()) {
                         event.setCancelled(true);
                         player.onPacketCancel();
@@ -42,7 +41,13 @@ public class BadPacketsG extends Check implements PacketCheck {
                 } else {
                     lastSneaking = false;
                 }
+                respawn = false;
             }
         }
     }
+
+    public void handleRespawn() {
+        // Clients could potentially not send a STOP_SNEAKING packet when they die, so we need to track it
+        respawn = true;
+    }
 }

src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsH.java

@@ -10,7 +10,6 @@ import com.github.retrooper.packetevents.manager.server.ServerVersion;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.protocol.player.ClientVersion;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientInteractEntity;
-import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerFlying;
 
 @CheckData(name = "BadPacketsH")
 public class BadPacketsH extends Check implements PacketCheck {
@@ -44,7 +43,7 @@ public class BadPacketsH extends Check implements PacketCheck {
             if (player.getClientVersion().isOlderThan(ClientVersion.V_1_9)
                     && PacketEvents.getAPI().getServerManager().getVersion().isNewerThan(ServerVersion.V_1_8)) return;
 
-            if (!sentAnimation && flagAndAlert()) {
+            if (!sentAnimation && flagAndAlert() && shouldModifyPackets()) {
                 event.setCancelled(true);
                 player.onPacketCancel();
             }

src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsI.java

@@ -8,7 +8,7 @@ import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerAbilities;
 
-@CheckData(name = "BadPacketsI")
+@CheckData(name = "BadPacketsI", description = "Claimed to be flying while unable to fly")
 public class BadPacketsI extends Check implements PacketCheck {
     public BadPacketsI(GrimPlayer player) {
         super(player);

src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsJ.java

@@ -7,7 +7,7 @@ import ac.grim.grimac.player.GrimPlayer;
 import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 
-@CheckData(name = "BadPacketsJ")
+@CheckData(name = "BadPacketsJ", description = "Sent steer vehicle packets while not in a vehicle")
 public class BadPacketsJ extends Check implements PacketCheck {
     public BadPacketsJ(GrimPlayer player) {
         super(player);

src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsK.java

@@ -8,7 +8,7 @@ import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.protocol.player.GameMode;
 
-@CheckData(name = "BadPacketsK")
+@CheckData(name = "BadPacketsK", description = "Sent spectate packets while not in spectator mode")
 public class BadPacketsK extends Check implements PacketCheck {
     public BadPacketsK(GrimPlayer player) {
         super(player);

src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsL.java

@@ -13,8 +13,7 @@ import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPl
 
 import java.util.Locale;
 
-// checks for impossible dig packets
-@CheckData(name = "BadPacketsL")
+@CheckData(name = "BadPacketsL", description = "Sent impossible dig packet")
 public class BadPacketsL extends Check implements PacketCheck {
 
     public BadPacketsL(GrimPlayer player) {

src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsO.java

@@ -39,7 +39,7 @@ public class BadPacketsO extends Check implements PacketCheck {
             boolean hasID = false;
 
             for (Pair<Long, Long> iterator : keepaliveMap) {
-                if (iterator.getFirst() == id) {
+                if (iterator.first() == id) {
                     hasID = true;
                     break;
                 }
@@ -55,7 +55,7 @@ public class BadPacketsO extends Check implements PacketCheck {
                 do {
                     data = keepaliveMap.poll();
                     if (data == null) break;
-                } while (data.getFirst() != id);
+                } while (data.first() != id);
             }
         }
     }

src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsP.java

@@ -8,6 +8,7 @@ import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.event.PacketSendEvent;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientClickWindow;
+import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientClickWindow.WindowClickType;
 import com.github.retrooper.packetevents.wrapper.play.server.WrapperPlayServerOpenWindow;
 
 @CheckData(name = "BadPacketsP", experimental = true)
@@ -33,35 +34,22 @@ public class BadPacketsP extends Check implements PacketCheck {
     public void onPacketReceive(PacketReceiveEvent event) {
         if (event.getPacketType() == PacketType.Play.Client.CLICK_WINDOW) {
             WrapperPlayClientClickWindow wrapper = new WrapperPlayClientClickWindow(event);
-            int clickType = wrapper.getWindowClickType().ordinal();
+            WindowClickType clickType = wrapper.getWindowClickType();
             int button = wrapper.getButton();
 
-            boolean flag = false;
+            // TODO: Adjust for containers
+            boolean flag = switch (clickType) {
+                case PICKUP, QUICK_MOVE, THROW -> button != 0 && button != 1;
+                case SWAP -> (button > 8 || button < 0) && button != 40;
+                case CLONE -> button != 2;
+                case QUICK_CRAFT -> button == 3 || button == 7 || button > 10 || button < 0;
+                case PICKUP_ALL -> button != 0;
+                case UNKNOWN -> false;
+            };
 
-            //TODO: Adjust for containers
-            switch (clickType) {
-                case 0:
-                case 1:
-                case 4:
-                    if (button != 0 && button != 1) flag = true;
-                    break;
-                case 2:
-                    if ((button > 8 || button < 0) && button != 40) flag = true;
-                    break;
-                case 3:
-                    if (button != 2) flag = true;
-                    break;
-                case 5:
-                    if (button == 3 || button == 7 || button > 10 || button < 0) flag = true;
-                    break;
-                case 6:
-                    if (button != 0) flag = true;
-                    break;
-            }
-
-            //Allowing this to false flag to debug and find issues faster
+            // Allowing this to false flag to debug and find issues faster
             if (flag) {
-                if (flagAndAlert("clickType=" + clickType + " button=" + button + (wrapper.getWindowId() == containerId ? " container=" + containerType : "")) && shouldModifyPackets()) {
+                if (flagAndAlert("clickType=" + clickType.toString().toLowerCase() + ", button=" + button + (wrapper.getWindowId() == containerId ? ", container=" + containerType : "")) && shouldModifyPackets()) {
                     event.setCancelled(true);
                     player.onPacketCancel();
                 }

src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsR.java

@@ -41,7 +41,8 @@ public class BadPacketsR extends Check implements PacketCheck {
         if ((event.getPacketType() == PacketType.Play.Client.PLAYER_POSITION_AND_ROTATION ||
                 event.getPacketType() == PacketType.Play.Client.PLAYER_POSITION) && !player.compensatedEntities.getSelf().inVehicle()) {
             positions++;
-        } else if (event.getPacketType() == PacketType.Play.Client.STEER_VEHICLE && player.compensatedEntities.getSelf().inVehicle()) {
+        } else if ((event.getPacketType() == PacketType.Play.Client.STEER_VEHICLE || event.getPacketType() == PacketType.Play.Client.VEHICLE_MOVE)
+                && player.inVehicle()) {
             positions++;
         }
     }

src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsT.java

@@ -49,7 +49,7 @@ public class BadPacketsT extends Check implements PacketCheck {
                 //  27/12/2023 - Dynamic values for more than just one entity type?
                 //  28/12/2023 - Player-only is fine
                 //  30/12/2023 - Expansions differ in 1.9+
-                final float scale = (float) packetEntity.getAttributeValue(Attributes.GENERIC_SCALE);
+                final float scale = (float) packetEntity.getAttributeValue(Attributes.SCALE);
                 if (targetVector.y > (minVerticalDisplacement * scale) && targetVector.y < (maxVerticalDisplacement * scale)
                         && Math.abs(targetVector.x) < (maxHorizontalDisplacement * scale)
                         && Math.abs(targetVector.z) < (maxHorizontalDisplacement * scale)) {

src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsU.java

@@ -6,7 +6,6 @@ import ac.grim.grimac.checks.type.PacketCheck;
 import ac.grim.grimac.player.GrimPlayer;
 import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.protocol.item.ItemStack;
-import com.github.retrooper.packetevents.protocol.item.type.ItemType;
 import com.github.retrooper.packetevents.protocol.item.type.ItemTypes;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.protocol.player.ClientVersion;
@@ -15,7 +14,7 @@ import com.github.retrooper.packetevents.util.Vector3f;
 import com.github.retrooper.packetevents.util.Vector3i;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerBlockPlacement;
 
-@CheckData(name = "BadPacketsU", experimental = true)
+@CheckData(name = "BadPacketsU", description = "Sent impossible use item packet", experimental = true)
 public class BadPacketsU extends Check implements PacketCheck {
     public BadPacketsU(GrimPlayer player) {
         super(player);

src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsV.java

@@ -1,31 +0,0 @@
-package ac.grim.grimac.checks.impl.badpackets;
-
-import ac.grim.grimac.checks.Check;
-import ac.grim.grimac.checks.CheckData;
-import ac.grim.grimac.checks.type.PacketCheck;
-import ac.grim.grimac.player.GrimPlayer;
-import com.github.retrooper.packetevents.event.PacketReceiveEvent;
-import com.github.retrooper.packetevents.protocol.item.ItemStack;
-import com.github.retrooper.packetevents.protocol.packettype.PacketType;
-import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientInteractEntity;
-
-@CheckData(name = "BadPacketsV", experimental = true)
-public class BadPacketsV extends Check implements PacketCheck {
-    public BadPacketsV(GrimPlayer player) {
-        super(player);
-    }
-
-    @Override
-    public void onPacketReceive(PacketReceiveEvent event) {
-        if (event.getPacketType() == PacketType.Play.Client.INTERACT_ENTITY) {
-            WrapperPlayClientInteractEntity interactEntity = new WrapperPlayClientInteractEntity(event);
-            if (interactEntity.getAction() != WrapperPlayClientInteractEntity.InteractAction.ATTACK) return;
-            if (!player.packetStateData.isSlowedByUsingItem()) return;
-            ItemStack itemInUse = player.getInventory().getItemInHand(player.packetStateData.eatingHand);
-            if (flagAndAlert("UseItem=" + itemInUse.getType().getName().getKey()) && shouldModifyPackets()) {
-                event.setCancelled(true);
-                player.onPacketCancel();
-            }
-        }
-    }
-}

src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsW.java

@@ -5,7 +5,7 @@ import ac.grim.grimac.checks.CheckData;
 import ac.grim.grimac.checks.type.PacketCheck;
 import ac.grim.grimac.player.GrimPlayer;
 
-@CheckData(name = "BadPacketsW", experimental = true)
+@CheckData(name = "BadPacketsW", description = "Interacted with non-existent entity", experimental = true)
 public class BadPacketsW extends Check implements PacketCheck {
     public BadPacketsW(GrimPlayer player) {
         super(player);

src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsX.java

@@ -1,45 +1,70 @@
 package ac.grim.grimac.checks.impl.badpackets;
 
+import ac.grim.grimac.GrimAPI;
 import ac.grim.grimac.checks.Check;
 import ac.grim.grimac.checks.CheckData;
-import ac.grim.grimac.checks.type.PacketCheck;
+import ac.grim.grimac.checks.type.BlockBreakCheck;
 import ac.grim.grimac.player.GrimPlayer;
-import ac.grim.grimac.utils.nmsutil.BlockBreakSpeed;
-import com.github.retrooper.packetevents.event.PacketReceiveEvent;
+import ac.grim.grimac.utils.anticheat.update.BlockBreak;
 import com.github.retrooper.packetevents.protocol.item.type.ItemTypes;
 import com.github.retrooper.packetevents.protocol.player.ClientVersion;
 import com.github.retrooper.packetevents.protocol.player.DiggingAction;
 import com.github.retrooper.packetevents.protocol.world.states.type.StateType;
 import com.github.retrooper.packetevents.protocol.world.states.type.StateTypes;
-import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerDigging;
+import com.github.retrooper.packetevents.util.Vector3i;
 
-@CheckData(name = "BadPacketsX", experimental = true)
-public class BadPacketsX extends Check implements PacketCheck {
+@CheckData(name = "BadPacketsX")
+public class BadPacketsX extends Check implements BlockBreakCheck {
     public BadPacketsX(GrimPlayer player) {
         super(player);
     }
 
+    private int lastTick;
+    private boolean didLastFlag;
+    private Vector3i lastBreakLoc;
+    private StateType lastBlockType;
+
     public final boolean noFireHitbox = player.getClientVersion().isOlderThanOrEquals(ClientVersion.V_1_15_2);
 
-    public final void handle(PacketReceiveEvent event, WrapperPlayClientPlayerDigging dig, StateType block) {
-        if (dig.getAction() != DiggingAction.START_DIGGING && dig.getAction() != DiggingAction.FINISHED_DIGGING)
+    @Override
+    public void onBlockBreak(BlockBreak blockBreak) {
+        if (blockBreak.action != DiggingAction.START_DIGGING && blockBreak.action != DiggingAction.FINISHED_DIGGING)
             return;
 
-        final boolean invalid;
+        final StateType block = blockBreak.block.getType();
 
-        if (dig.getAction() == DiggingAction.FINISHED_DIGGING) {
-            invalid = BlockBreakSpeed.getBlockDamage(player, dig.getBlockPosition()) >= 1 || block.getHardness() == -1.0f;
-        } else invalid = (block == StateTypes.LIGHT && !(player.getInventory().getHeldItem().is(ItemTypes.LIGHT) || player.getInventory().getOffHand().is(ItemTypes.LIGHT)))
+        // Fixes false from breaking kelp underwater
+        // The client sends two start digging packets to the server both in the same tick. BadPacketsX gets called twice, doesn't false the first time, but falses the second
+        // One ends up breaking the kelp, the other ends up doing nothing besides falsing this check because we think they're trying to mine water
+        // I am explicitly making this patch as narrow and specific as possible to potentially discover other blocks that exhibit similar behaviour
+        int newTick = GrimAPI.INSTANCE.getTickManager().currentTick;
+        if (lastTick == newTick
+                && lastBreakLoc.equals(blockBreak.position)
+                && !didLastFlag
+                && lastBlockType.getHardness() == 0.0F
+                && lastBlockType.getBlastResistance() == 0.0F
+                && block == StateTypes.WATER
+        ) return;
+        lastTick = newTick;
+        lastBreakLoc = blockBreak.position;
+        lastBlockType = block;
+
+        // the block does not have a hitbox
+        boolean invalid = (block == StateTypes.LIGHT && !(player.getInventory().getHeldItem().is(ItemTypes.LIGHT) || player.getInventory().getOffHand().is(ItemTypes.LIGHT)))
                 || block.isAir()
                 || block == StateTypes.WATER
                 || block == StateTypes.LAVA
                 || block == StateTypes.BUBBLE_COLUMN
                 || block == StateTypes.MOVING_PISTON
-                || (block == StateTypes.FIRE && noFireHitbox);
+                || block == StateTypes.FIRE && noFireHitbox
+                // or the client claims to have broken an unbreakable block
+                || block.getHardness() == -1.0f && blockBreak.action == DiggingAction.FINISHED_DIGGING;
 
-        if (invalid && flagAndAlert("block=" + block.getName() + ", type=" + dig.getAction()) && shouldModifyPackets()) {
-            event.setCancelled(true);
-            player.onPacketCancel();
+        if (invalid && flagAndAlert("block=" + block.getName() + ", type=" + blockBreak.action) && shouldModifyPackets()) {
+            didLastFlag = true;
+            blockBreak.cancel();
+        } else {
+            didLastFlag = false;
         }
     }
 }

src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsY.java

@@ -8,10 +8,7 @@ import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientHeldItemChange;
 
-/**
- * Checks for out of bounds slot changes
- */
-@CheckData(name = "BadPacketsY")
+@CheckData(name = "BadPacketsY", description = "Sent out of bounds slot id")
 public class BadPacketsY extends Check implements PacketCheck {
     public BadPacketsY(GrimPlayer player) {
         super(player);

src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsZ.java

@@ -2,26 +2,27 @@ package ac.grim.grimac.checks.impl.badpackets;
 
 import ac.grim.grimac.checks.Check;
 import ac.grim.grimac.checks.CheckData;
-import ac.grim.grimac.checks.type.PacketCheck;
+import ac.grim.grimac.checks.type.BlockBreakCheck;
 import ac.grim.grimac.player.GrimPlayer;
-import com.github.retrooper.packetevents.event.PacketReceiveEvent;
+import ac.grim.grimac.utils.anticheat.MessageUtil;
+import ac.grim.grimac.utils.anticheat.update.BlockBreak;
+import com.github.retrooper.packetevents.PacketEvents;
+import com.github.retrooper.packetevents.manager.server.ServerVersion;
 import com.github.retrooper.packetevents.protocol.player.ClientVersion;
 import com.github.retrooper.packetevents.protocol.player.DiggingAction;
 import com.github.retrooper.packetevents.util.Vector3i;
-import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerDigging;
 
-import static ac.grim.grimac.events.packets.patch.ResyncWorldUtil.resyncPosition;
 import static ac.grim.grimac.utils.nmsutil.BlockBreakSpeed.getBlockDamage;
 
-@CheckData(name = "BadPacketsZ", experimental = true)
-public class BadPacketsZ extends Check implements PacketCheck {
+@CheckData(name = "BadPacketsZ")
+public class BadPacketsZ extends Check implements BlockBreakCheck {
     public BadPacketsZ(final GrimPlayer player) {
         super(player);
     }
 
     private boolean lastBlockWasInstantBreak = false;
     private Vector3i lastBlock, lastCancelledBlock, lastLastBlock = null;
-    private final int exemptedY = player.getClientVersion().isNewerThanOrEquals(ClientVersion.V_1_8) ? 4095 : 255;
+    private final int exemptedY = player.getClientVersion().isOlderThan(ClientVersion.V_1_8) ? 255 : (PacketEvents.getAPI().getServerManager().getVersion().isNewerThanOrEquals(ServerVersion.V_1_14) ? -1 : 4095);
 
     // The client sometimes sends a wierd cancel packet
     private boolean shouldExempt(final Vector3i pos) {
@@ -33,21 +34,14 @@ public class BadPacketsZ extends Check implements PacketCheck {
         if (player.getClientVersion().isOlderThan(ClientVersion.V_1_14_4) && pos.y != exemptedY)
             return false;
 
-        // the client only sends this packet if the last block was an instant break
-        if (getBlockDamage(player, lastBlock) < 1)
-            return false;
-
         // and if this block is not an instant break
         return player.getClientVersion().isOlderThan(ClientVersion.V_1_14_4) || getBlockDamage(player, pos) < 1;
     }
 
-    private String formatted(Vector3i vec) {
-        return vec == null ? "null" : vec.x + ", " + vec.y + ", " + vec.z;
-    }
-
-    public void handle(PacketReceiveEvent event, WrapperPlayClientPlayerDigging dig) {
-        if (dig.getAction() == DiggingAction.START_DIGGING) {
-            final Vector3i pos = dig.getBlockPosition();
+    @Override
+    public void onBlockBreak(BlockBreak blockBreak) {
+        if (blockBreak.action == DiggingAction.START_DIGGING) {
+            final Vector3i pos = blockBreak.position;
 
             lastBlockWasInstantBreak = getBlockDamage(player, pos) >= 1;
             lastCancelledBlock = null;
@@ -55,11 +49,11 @@ public class BadPacketsZ extends Check implements PacketCheck {
             lastBlock = pos;
         }
 
-        if (dig.getAction() == DiggingAction.CANCELLED_DIGGING) {
-            final Vector3i pos = dig.getBlockPosition();
+        if (blockBreak.action == DiggingAction.CANCELLED_DIGGING) {
+            final Vector3i pos = blockBreak.position;
 
             if (shouldExempt(pos)) {
-                lastCancelledBlock = null;
+                lastCancelledBlock = pos;
                 lastLastBlock = null;
                 lastBlock = null;
                 return;
@@ -68,11 +62,9 @@ public class BadPacketsZ extends Check implements PacketCheck {
             if (!pos.equals(lastBlock)) {
                 // https://github.com/GrimAnticheat/Grim/issues/1512
                 if (player.getClientVersion().isOlderThan(ClientVersion.V_1_14_4) || (!lastBlockWasInstantBreak && pos.equals(lastCancelledBlock))) {
-                    if (flagAndAlert("action=CANCELLED_DIGGING" + ", last=" + formatted(lastBlock) + ", pos=" + formatted(pos))) {
+                    if (flagAndAlert("action=CANCELLED_DIGGING" + ", last=" + MessageUtil.toUnlabledString(lastBlock) + ", pos=" + MessageUtil.toUnlabledString(pos))) {
                         if (shouldModifyPackets()) {
-                            event.setCancelled(true);
-                            player.onPacketCancel();
-                            resyncPosition(player, pos);
+                            blockBreak.cancel();
                         }
                     }
                 }
@@ -84,16 +76,14 @@ public class BadPacketsZ extends Check implements PacketCheck {
             return;
         }
 
-        if (dig.getAction() == DiggingAction.FINISHED_DIGGING) {
-            final Vector3i pos = dig.getBlockPosition();
+        if (blockBreak.action == DiggingAction.FINISHED_DIGGING) {
+            final Vector3i pos = blockBreak.position;
 
             // when a player looks away from the mined block, they send a cancel, and if they look at it again, they don't send another start. (thanks mojang!)
             if (!pos.equals(lastCancelledBlock) && (!lastBlockWasInstantBreak || player.getClientVersion().isOlderThan(ClientVersion.V_1_14_4)) && !pos.equals(lastBlock)) {
-                if (flagAndAlert("action=FINISHED_DIGGING" + ", last=" + formatted(lastBlock) + ", pos=" + formatted(pos))) {
+                if (flagAndAlert("action=FINISHED_DIGGING" + ", last=" + MessageUtil.toUnlabledString(lastBlock) + ", pos=" + MessageUtil.toUnlabledString(pos))) {
                     if (shouldModifyPackets()) {
-                        event.setCancelled(true);
-                        player.onPacketCancel();
-                        resyncPosition(player, pos);
+                        blockBreak.cancel();
                     }
                 }
             }

src/main/java/ac/grim/grimac/checks/impl/combat/MultiInteractA.java

@@ -0,0 +1,71 @@
+package ac.grim.grimac.checks.impl.combat;
+
+import ac.grim.grimac.checks.Check;
+import ac.grim.grimac.checks.CheckData;
+import ac.grim.grimac.checks.type.PostPredictionCheck;
+import ac.grim.grimac.player.GrimPlayer;
+import ac.grim.grimac.utils.anticheat.update.PredictionComplete;
+import com.github.retrooper.packetevents.event.PacketReceiveEvent;
+import com.github.retrooper.packetevents.protocol.packettype.PacketType;
+import com.github.retrooper.packetevents.protocol.player.ClientVersion;
+import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientInteractEntity;
+import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerFlying;
+
+import java.util.ArrayList;
+
+@CheckData(name = "MultiInteractA", description = "Interacted with multiple entities in the same tick", experimental = true)
+public class MultiInteractA extends Check implements PostPredictionCheck {
+    public MultiInteractA(final GrimPlayer player) {
+        super(player);
+    }
+
+    private final ArrayList<String> flags = new ArrayList<>();
+    private int lastEntity;
+    private boolean lastSneaking;
+    private boolean hasInteracted = false;
+
+    @Override
+    public void onPacketReceive(PacketReceiveEvent event) {
+        if (event.getPacketType() == PacketType.Play.Client.INTERACT_ENTITY) {
+            WrapperPlayClientInteractEntity packet = new WrapperPlayClientInteractEntity(event);
+            int entity = packet.getEntityId();
+            boolean sneaking = packet.isSneaking().orElse(false);
+
+            if (hasInteracted && entity != lastEntity) {
+                String verbose = "lastEntity=" + lastEntity + ", entity=" + entity
+                        + ", lastSneaking=" + lastSneaking + ", sneaking=" + sneaking;
+                if (player.getClientVersion().isOlderThanOrEquals(ClientVersion.V_1_8)) {
+                    if (flagAndAlert(verbose) && shouldModifyPackets()) {
+                        event.setCancelled(true);
+                        player.onPacketCancel();
+                    }
+                } else {
+                    flags.add(verbose);
+                }
+            }
+
+            lastEntity = entity;
+            lastSneaking = sneaking;
+            hasInteracted = true;
+        }
+
+        if (WrapperPlayClientPlayerFlying.isFlying(event.getPacketType()) && player.getClientVersion().isOlderThanOrEquals(ClientVersion.V_1_8) && !player.packetStateData.lastPacketWasTeleport) {
+            hasInteracted = false;
+        }
+    }
+
+    @Override
+    public void onPredictionComplete(PredictionComplete predictionComplete) {
+        // we don't need to check pre-1.9 players here (no tick skipping)
+        if (player.getClientVersion().isOlderThanOrEquals(ClientVersion.V_1_8)) return;
+
+        if (player.isTickingReliablyFor(3) && !player.uncertaintyHandler.lastVehicleSwitch.hasOccurredSince(0)) {
+            for (String verbose : flags) {
+                flagAndAlert(verbose);
+            }
+        }
+
+        flags.clear();
+        hasInteracted = false;
+    }
+}

src/main/java/ac/grim/grimac/checks/impl/combat/MultiInteractB.java

@@ -0,0 +1,72 @@
+package ac.grim.grimac.checks.impl.combat;
+
+import ac.grim.grimac.checks.Check;
+import ac.grim.grimac.checks.CheckData;
+import ac.grim.grimac.checks.type.PostPredictionCheck;
+import ac.grim.grimac.player.GrimPlayer;
+import ac.grim.grimac.utils.anticheat.MessageUtil;
+import ac.grim.grimac.utils.anticheat.update.PredictionComplete;
+import com.github.retrooper.packetevents.event.PacketReceiveEvent;
+import com.github.retrooper.packetevents.protocol.packettype.PacketType;
+import com.github.retrooper.packetevents.protocol.player.ClientVersion;
+import com.github.retrooper.packetevents.util.Vector3f;
+import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientInteractEntity;
+import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerFlying;
+
+import java.util.ArrayList;
+
+@CheckData(name = "MultiInteractB", experimental = true)
+public class MultiInteractB extends Check implements PostPredictionCheck {
+    public MultiInteractB(final GrimPlayer player) {
+        super(player);
+    }
+
+    private final ArrayList<String> flags = new ArrayList<>();
+    private Vector3f lastPos;
+    private boolean hasInteracted = false;
+
+    @Override
+    public void onPacketReceive(PacketReceiveEvent event) {
+        if (event.getPacketType() == PacketType.Play.Client.INTERACT_ENTITY) {
+            Vector3f pos = new WrapperPlayClientInteractEntity(event).getTarget().orElse(null);
+
+            if (pos == null) {
+                return;
+            }
+
+            if (hasInteracted && !pos.equals(lastPos)) {
+                String verbose = "pos=" + MessageUtil.toUnlabledString(pos) + ", lastPos=" + MessageUtil.toUnlabledString(lastPos);
+                if (player.getClientVersion().isOlderThanOrEquals(ClientVersion.V_1_8)) {
+                    if (flagAndAlert(verbose) && shouldModifyPackets()) {
+                        event.setCancelled(true);
+                        player.onPacketCancel();
+                    }
+                } else {
+                    flags.add(verbose);
+                }
+            }
+
+            lastPos = pos;
+            hasInteracted = true;
+        }
+
+        if (WrapperPlayClientPlayerFlying.isFlying(event.getPacketType()) && player.getClientVersion().isOlderThanOrEquals(ClientVersion.V_1_8) && !player.packetStateData.lastPacketWasTeleport) {
+            hasInteracted = false;
+        }
+    }
+
+    @Override
+    public void onPredictionComplete(PredictionComplete predictionComplete) {
+        // we don't need to check pre-1.9 players here (no tick skipping)
+        if (player.getClientVersion().isOlderThanOrEquals(ClientVersion.V_1_8)) return;
+
+        if (player.isTickingReliablyFor(3) && !player.uncertaintyHandler.lastVehicleSwitch.hasOccurredSince(0)) {
+            for (String verbose : flags) {
+                flagAndAlert(verbose);
+            }
+        }
+
+        flags.clear();
+        hasInteracted = false;
+    }
+}

src/main/java/ac/grim/grimac/checks/impl/combat/Reach.java

@@ -15,6 +15,7 @@
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 package ac.grim.grimac.checks.impl.combat;
 
+import ac.grim.grimac.api.config.ConfigManager;
 import ac.grim.grimac.checks.Check;
 import ac.grim.grimac.checks.CheckData;
 import ac.grim.grimac.checks.type.PacketCheck;
@@ -32,7 +33,8 @@ import com.github.retrooper.packetevents.protocol.player.ClientVersion;
 import com.github.retrooper.packetevents.protocol.player.GameMode;
 import com.github.retrooper.packetevents.util.Vector3d;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientInteractEntity;
-import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerFlying;
+import it.unimi.dsi.fastutil.ints.Int2ObjectMap;
+import it.unimi.dsi.fastutil.ints.Int2ObjectOpenHashMap;
 import org.bukkit.util.Vector;
 
 import java.util.*;
@@ -42,7 +44,7 @@ import java.util.*;
 public class Reach extends Check implements PacketCheck {
     // Only one flag per reach attack, per entity, per tick.
     // We store position because lastX isn't reliable on teleports.
-    private final Map<Integer, Vector3d> playerAttackQueue = new HashMap<>();
+    private final Int2ObjectMap<Vector3d> playerAttackQueue = new Int2ObjectOpenHashMap<>();
     private static final List<EntityType> blacklisted = Arrays.asList(
             EntityTypes.BOAT,
             EntityTypes.CHEST_BOAT,
@@ -80,7 +82,7 @@ public class Reach extends Check implements PacketCheck {
                 }
                 return;
             }
-            
+
             // Dead entities cause false flags (https://github.com/GrimAnticheat/Grim/issues/546)
             if (entity.isDead) return;
 
@@ -105,9 +107,7 @@ public class Reach extends Check implements PacketCheck {
         }
 
         // If the player set their look, or we know they have a new tick
-        if (WrapperPlayClientPlayerFlying.isFlying(event.getPacketType()) ||
-                event.getPacketType() == PacketType.Play.Client.PONG ||
-                event.getPacketType() == PacketType.Play.Client.WINDOW_CONFIRMATION) {
+        if (isUpdate(event.getPacketType())) {
             tickBetterReachCheckWithAngle();
         }
     }
@@ -136,13 +136,13 @@ public class Reach extends Check implements PacketCheck {
             if (reachEntity.getType() == EntityTypes.END_CRYSTAL) {
                 targetBox = new SimpleCollisionBox(reachEntity.trackedServerPosition.getPos().subtract(1, 0, 1), reachEntity.trackedServerPosition.getPos().add(1, 2, 1));
             }
-            return ReachUtils.getMinReachToBox(player, targetBox) > player.compensatedEntities.getSelf().getAttributeValue(Attributes.PLAYER_ENTITY_INTERACTION_RANGE);
+            return ReachUtils.getMinReachToBox(player, targetBox) > player.compensatedEntities.getSelf().getAttributeValue(Attributes.ENTITY_INTERACTION_RANGE);
         }
     }
 
     private void tickBetterReachCheckWithAngle() {
-        for (Map.Entry<Integer, Vector3d> attack : playerAttackQueue.entrySet()) {
-            PacketEntity reachEntity = player.compensatedEntities.entityMap.get(attack.getKey().intValue());
+        for (Int2ObjectMap.Entry<Vector3d> attack : playerAttackQueue.int2ObjectEntrySet()) {
+            PacketEntity reachEntity = player.compensatedEntities.entityMap.get(attack.getIntKey());
             if (reachEntity != null) {
                 String result = checkReach(reachEntity, attack.getValue(), false);
                 if (result != null) {
@@ -200,13 +200,14 @@ public class Reach extends Check implements PacketCheck {
         }
 
         // +3 would be 3 + 3 = 6, which is the pre-1.20.5 behaviour, preventing "Missed Hitbox"
-        final double distance = player.compensatedEntities.getSelf().getAttributeValue(Attributes.PLAYER_ENTITY_INTERACTION_RANGE) + 3;
+        final double distance = player.compensatedEntities.getSelf().getAttributeValue(Attributes.ENTITY_INTERACTION_RANGE) + 3;
+        final double[] possibleEyeHeights = player.getPossibleEyeHeights();
         for (Vector lookVec : possibleLookDirs) {
-            for (double eye : player.getPossibleEyeHeights()) {
+            for (double eye : possibleEyeHeights) {
                 Vector eyePos = new Vector(from.getX(), from.getY() + eye, from.getZ());
                 Vector endReachPos = eyePos.clone().add(new Vector(lookVec.getX() * distance, lookVec.getY() * distance, lookVec.getZ() * distance));
 
-                Vector intercept = ReachUtils.calculateIntercept(targetBox, eyePos, endReachPos).getFirst();
+                Vector intercept = ReachUtils.calculateIntercept(targetBox, eyePos, endReachPos).first();
 
                 if (ReachUtils.isVecInside(targetBox, eyePos)) {
                     minDistance = 0;
@@ -224,7 +225,7 @@ public class Reach extends Check implements PacketCheck {
             if (minDistance == Double.MAX_VALUE) {
                 cancelBuffer = 1;
                 return "Missed hitbox";
-            } else if (minDistance > player.compensatedEntities.getSelf().getAttributeValue(Attributes.PLAYER_ENTITY_INTERACTION_RANGE)) {
+            } else if (minDistance > player.compensatedEntities.getSelf().getAttributeValue(Attributes.ENTITY_INTERACTION_RANGE)) {
                 cancelBuffer = 1;
                 return String.format("%.5f", minDistance) + " blocks";
             } else {
@@ -236,9 +237,8 @@ public class Reach extends Check implements PacketCheck {
     }
 
     @Override
-    public void reload() {
-        super.reload();
-        this.cancelImpossibleHits = getConfig().getBooleanElse("Reach.block-impossible-hits", true);
-        this.threshold = getConfig().getDoubleElse("Reach.threshold", 0.0005);
+    public void onReload(ConfigManager config) {
+        this.cancelImpossibleHits = config.getBooleanElse("Reach.block-impossible-hits", true);
+        this.threshold = config.getDoubleElse("Reach.threshold", 0.0005);
     }
 }

src/main/java/ac/grim/grimac/checks/impl/crash/CrashB.java

@@ -8,7 +8,7 @@ import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.protocol.player.GameMode;
 
-@CheckData(name = "CrashB")
+@CheckData(name = "CrashB", description = "Sent creative mode inventory click packets while not in creative mode")
 public class CrashB extends Check implements PacketCheck {
     public CrashB(GrimPlayer player) {
         super(player);
@@ -18,7 +18,6 @@ public class CrashB extends Check implements PacketCheck {
     public void onPacketReceive(PacketReceiveEvent event) {
         if (event.getPacketType() == PacketType.Play.Client.CREATIVE_INVENTORY_ACTION) {
             if (player.gamemode != GameMode.CREATIVE) {
-                player.getSetbackTeleportUtil().executeViolationSetback();
                 event.setCancelled(true);
                 player.onPacketCancel();
                 flagAndAlert(); // Could be transaction split, no need to setback though

src/main/java/ac/grim/grimac/checks/impl/crash/CrashC.java

@@ -8,7 +8,7 @@ import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.protocol.world.Location;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerFlying;
 
-@CheckData(name = "CrashC")
+@CheckData(name = "CrashC", description = "Sent non-finite position or rotation")
 public class CrashC extends Check implements PacketCheck {
     public CrashC(GrimPlayer playerData) {
         super(playerData);

src/main/java/ac/grim/grimac/checks/impl/crash/CrashD.java

@@ -13,7 +13,7 @@ import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientClickWindow;
 import com.github.retrooper.packetevents.wrapper.play.server.WrapperPlayServerOpenWindow;
 
-@CheckData(name = "CrashD", experimental = false)
+@CheckData(name = "CrashD", description = "Clicking slots in lectern window")
 public class CrashD extends Check implements PacketCheck {
 
     public CrashD(GrimPlayer playerData) {

src/main/java/ac/grim/grimac/checks/impl/crash/CrashG.java

@@ -13,7 +13,7 @@ import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPl
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerDigging;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientUseItem;
 
-@CheckData(name = "CrashG")
+@CheckData(name = "CrashG", description = "Sent negative sequence id")
 public class CrashG extends Check implements PacketCheck {
 
     public CrashG(GrimPlayer player) {

src/main/java/ac/grim/grimac/checks/impl/exploit/ExploitC.java

@@ -0,0 +1,32 @@
+package ac.grim.grimac.checks.impl.exploit;
+
+import ac.grim.grimac.checks.Check;
+import ac.grim.grimac.checks.CheckData;
+import ac.grim.grimac.checks.type.PacketCheck;
+import ac.grim.grimac.player.GrimPlayer;
+import com.github.retrooper.packetevents.event.PacketReceiveEvent;
+import com.github.retrooper.packetevents.protocol.packettype.PacketType;
+import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientEditBook;
+
+@CheckData(name = "ExploitC", description = "Too long book title")
+public class ExploitC extends Check implements PacketCheck {
+    public ExploitC(GrimPlayer playerData) {
+        super(playerData);
+    }
+
+    @Override
+    public void onPacketReceive(PacketReceiveEvent event) {
+        if (event.getPacketType() == PacketType.Play.Client.EDIT_BOOK) {
+            final String title = new WrapperPlayClientEditBook(event).getTitle();
+
+            if (title == null) return; // book was not signed
+
+            if (title.length() > 15) {
+                if (flagAndAlert("title=" + title) && shouldModifyPackets()) {
+                    event.setCancelled(true);
+                    player.onPacketCancel();
+                }
+            }
+        }
+    }
+}

src/main/java/ac/grim/grimac/checks/impl/groundspoof/NoFallA.java

@@ -43,7 +43,10 @@ public class NoFallA extends Check implements PacketCheck {
                 if (!isNearGround(wrapper.isOnGround())) { // If player isn't near ground
                     // 1.8 boats have a mind on their own... only flag if they're not near a boat or are on 1.9+
                     if (!GhostBlockDetector.isGhostBlock(player) && flagWithSetback()) alert("");
-                    if (shouldModifyPackets()) wrapper.setOnGround(false);
+                    if (shouldModifyPackets()) {
+                        wrapper.setOnGround(false);
+                        event.markForReEncode(true);
+                    }
                 }
             }
         }
@@ -59,10 +62,16 @@ public class NoFallA extends Check implements PacketCheck {
             // Also flip teleports because I don't trust vanilla's handling of teleports and ground
             if (flipPlayerGroundStatus) {
                 flipPlayerGroundStatus = false;
-                if (shouldModifyPackets()) wrapper.setOnGround(!wrapper.isOnGround());
+                if (shouldModifyPackets()) {
+                    wrapper.setOnGround(!wrapper.isOnGround());
+                    event.markForReEncode(true);
+                }
             }
             if (player.packetStateData.lastPacketWasTeleport) {
-                if (shouldModifyPackets()) wrapper.setOnGround(false);
+                if (shouldModifyPackets()) {
+                    wrapper.setOnGround(false);
+                    event.markForReEncode(true);
+                }
             }
         }
     }

src/main/java/ac/grim/grimac/checks/impl/misc/ClientBrand.java

@@ -9,6 +9,7 @@ import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPluginMessage;
 import org.bukkit.Bukkit;
+import org.bukkit.ChatColor;
 import org.bukkit.entity.Player;
 
 public class ClientBrand extends Check implements PacketCheck {
@@ -38,6 +39,7 @@ public class ClientBrand extends Check implements PacketCheck {
                 System.arraycopy(data, 1, minusLength, 0, minusLength.length);
 
                 brand = new String(minusLength).replace(" (Velocity)", ""); //removes velocity's brand suffix
+                brand = ChatColor.stripColor(brand); //strip color codes from client brand
                 if (player.checkManager.getPrePredictionCheck(ExploitA.class).checkString(brand)) brand = "sent log4j";
                 if (!GrimAPI.INSTANCE.getConfigManager().isIgnoredClient(brand)) {
                     String message = GrimAPI.INSTANCE.getConfigManager().getConfig().getStringElse("client-brand-format", "%prefix% &f%player% joined using %brand%");

src/main/java/ac/grim/grimac/checks/impl/misc/FastBreak.java

@@ -1,36 +1,26 @@
 package ac.grim.grimac.checks.impl.misc;
 
-import ac.grim.grimac.GrimAPI;
 import ac.grim.grimac.checks.Check;
 import ac.grim.grimac.checks.CheckData;
-import ac.grim.grimac.checks.type.PacketCheck;
+import ac.grim.grimac.checks.type.BlockBreakCheck;
 import ac.grim.grimac.player.GrimPlayer;
+import ac.grim.grimac.utils.anticheat.update.BlockBreak;
 import ac.grim.grimac.utils.math.GrimMath;
 import ac.grim.grimac.utils.nmsutil.BlockBreakSpeed;
-import com.github.retrooper.packetevents.PacketEvents;
 import com.github.retrooper.packetevents.event.PacketReceiveEvent;
-import com.github.retrooper.packetevents.manager.server.ServerVersion;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.protocol.player.ClientVersion;
 import com.github.retrooper.packetevents.protocol.player.DiggingAction;
 import com.github.retrooper.packetevents.protocol.world.states.WrappedBlockState;
 import com.github.retrooper.packetevents.protocol.world.states.type.StateTypes;
 import com.github.retrooper.packetevents.util.Vector3i;
-import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerDigging;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerFlying;
-import com.github.retrooper.packetevents.wrapper.play.server.WrapperPlayServerAcknowledgeBlockChanges;
-import com.github.retrooper.packetevents.wrapper.play.server.WrapperPlayServerBlockChange;
-import io.github.retrooper.packetevents.util.folia.FoliaScheduler;
-import org.bukkit.Chunk;
-import org.bukkit.Location;
-import org.bukkit.block.Block;
-import org.bukkit.entity.Player;
 
 // Based loosely off of Hawk BlockBreakSpeedSurvival
 // Also based loosely off of NoCheatPlus FastBreak
 // Also based off minecraft wiki: https://minecraft.wiki/w/Breaking#Instant_breaking
-@CheckData(name = "FastBreak", experimental = false)
-public class FastBreak extends Check implements PacketCheck {
+@CheckData(name = "FastBreak", description = "Breaking blocks too quickly")
+public class FastBreak extends Check implements BlockBreakCheck {
     public FastBreak(GrimPlayer playerData) {
         super(playerData);
     }
@@ -49,6 +39,62 @@ public class FastBreak extends Check implements PacketCheck {
     double blockBreakBalance = 0;
     double blockDelayBalance = 0;
 
+    @Override
+    public void onBlockBreak(BlockBreak blockBreak) {
+        if (blockBreak.action == DiggingAction.START_DIGGING) {
+            WrappedBlockState block = blockBreak.block;
+
+            // Exempt all blocks that do not exist in the player version
+            if (WrappedBlockState.getDefaultState(player.getClientVersion(), block.getType()).getType() == StateTypes.AIR) {
+                return;
+            }
+
+            startBreak = System.currentTimeMillis() - (targetBlock == null ? 50 : 0); // ???
+            targetBlock = blockBreak.position;
+
+            maximumBlockDamage = BlockBreakSpeed.getBlockDamage(player, targetBlock);
+
+            double breakDelay = System.currentTimeMillis() - lastFinishBreak;
+
+            if (breakDelay >= 275) { // Reduce buffer if "close enough"
+                blockDelayBalance *= 0.9;
+            } else { // Otherwise, increase buffer
+                blockDelayBalance += 300 - breakDelay;
+            }
+
+            if (blockDelayBalance > 1000) { // If more than a second of advantage
+                flagAndAlert("Delay=" + breakDelay);
+                if (shouldModifyPackets()) {
+                    blockBreak.cancel();
+                }
+            }
+
+            clampBalance();
+        }
+
+        if (blockBreak.action == DiggingAction.FINISHED_DIGGING && targetBlock != null) {
+            double predictedTime = Math.ceil(1 / maximumBlockDamage) * 50;
+            double realTime = System.currentTimeMillis() - startBreak;
+            double diff = predictedTime - realTime;
+
+            clampBalance();
+
+            if (diff < 25) {  // Reduce buffer if "close enough"
+                blockBreakBalance *= 0.9;
+            } else { // Otherwise, increase buffer
+                blockBreakBalance += diff;
+            }
+
+            if (blockBreakBalance > 1000) { // If more than a second of advantage
+                if (flagAndAlert("Diff=" + diff + ",Balance=" + blockBreakBalance) && shouldModifyPackets()) {
+                    blockBreak.cancel();
+                }
+            }
+
+            lastFinishBreak = System.currentTimeMillis();
+        }
+    }
+
     @Override
     public void onPacketReceive(PacketReceiveEvent event) {
         // Find the most optimal block damage using the animation packet, which is sent at least once a tick when breaking blocks
@@ -56,95 +102,6 @@ public class FastBreak extends Check implements PacketCheck {
         if ((player.getClientVersion().isNewerThanOrEquals(ClientVersion.V_1_9) ? event.getPacketType() == PacketType.Play.Client.ANIMATION : WrapperPlayClientPlayerFlying.isFlying(event.getPacketType())) && targetBlock != null) {
             maximumBlockDamage = Math.max(maximumBlockDamage, BlockBreakSpeed.getBlockDamage(player, targetBlock));
         }
-
-        if (event.getPacketType() == PacketType.Play.Client.PLAYER_DIGGING) {
-            WrapperPlayClientPlayerDigging digging = new WrapperPlayClientPlayerDigging(event);
-            final Vector3i blockPosition = digging.getBlockPosition();
-
-            if (digging.getAction() == DiggingAction.START_DIGGING) {
-                WrappedBlockState block = player.compensatedWorld.getWrappedBlockStateAt(blockPosition);
-                
-                // Exempt all blocks that do not exist in the player version
-                if (WrappedBlockState.getDefaultState(player.getClientVersion(), block.getType()).getType() == StateTypes.AIR) {
-                    return;
-                }
-            
-                startBreak = System.currentTimeMillis() - (targetBlock == null ? 50 : 0); // ???
-                targetBlock = blockPosition;
-                
-                maximumBlockDamage = BlockBreakSpeed.getBlockDamage(player, targetBlock);
-
-                double breakDelay = System.currentTimeMillis() - lastFinishBreak;
-
-                if (breakDelay >= 275) { // Reduce buffer if "close enough"
-                    blockDelayBalance *= 0.9;
-                } else { // Otherwise, increase buffer
-                    blockDelayBalance += 300 - breakDelay;
-                }
-
-                if (blockDelayBalance > 1000) { // If more than a second of advantage
-                    flagAndAlert("Delay=" + breakDelay);
-                    if (shouldModifyPackets()) {
-                        event.setCancelled(true); // Cancelling start digging will cause server to reject block break
-                        player.onPacketCancel();
-                    }
-                }
-
-                clampBalance();
-            }
-
-            if (digging.getAction() == DiggingAction.FINISHED_DIGGING && targetBlock != null) {
-                double predictedTime = Math.ceil(1 / maximumBlockDamage) * 50;
-                double realTime = System.currentTimeMillis() - startBreak;
-                double diff = predictedTime - realTime;
-
-                clampBalance();
-
-                if (diff < 25) {  // Reduce buffer if "close enough"
-                    blockBreakBalance *= 0.9;
-                } else { // Otherwise, increase buffer
-                    blockBreakBalance += diff;
-                }
-
-                if (blockBreakBalance > 1000) { // If more than a second of advantage
-                    FoliaScheduler.getEntityScheduler().execute(player.bukkitPlayer, GrimAPI.INSTANCE.getPlugin(), () -> {
-                        Player bukkitPlayer = player.bukkitPlayer;
-                        if (bukkitPlayer == null || !bukkitPlayer.isOnline()) return;
-
-                        if (bukkitPlayer.getLocation().distance(new Location(bukkitPlayer.getWorld(), blockPosition.getX(), blockPosition.getY(), blockPosition.getZ())) < 64) {
-                            final int chunkX = blockPosition.getX() >> 4;
-                            final int chunkZ = blockPosition.getZ() >> 4;
-                            if (!bukkitPlayer.getWorld().isChunkLoaded(chunkX, chunkZ)) return; // Don't load chunks sync
-
-                            Chunk chunk = bukkitPlayer.getWorld().getChunkAt(chunkX, chunkZ);
-                            Block block = chunk.getBlock(blockPosition.getX() & 15, blockPosition.getY(), blockPosition.getZ() & 15);
-
-                            int blockId;
-
-                            if (PacketEvents.getAPI().getServerManager().getVersion().isNewerThanOrEquals(ServerVersion.V_1_13)) {
-                                // Cache this because strings are expensive
-                                blockId = WrappedBlockState.getByString(PacketEvents.getAPI().getServerManager().getVersion().toClientVersion(), block.getBlockData().getAsString(false)).getGlobalId();
-                            } else {
-                                blockId = (block.getType().getId() << 4) | block.getData();
-                            }
-
-                            player.user.sendPacket(new WrapperPlayServerBlockChange(blockPosition, blockId));
-
-                            if (PacketEvents.getAPI().getServerManager().getVersion().isNewerThanOrEquals(ServerVersion.V_1_19)) { // Via will handle this for us pre-1.19
-                                player.user.sendPacket(new WrapperPlayServerAcknowledgeBlockChanges(digging.getSequence())); // Make 1.19 clients apply the changes
-                            }
-                        }
-                    }, null, 0);
-
-                    if (flagAndAlert("Diff=" + diff + ",Balance=" + blockBreakBalance) && shouldModifyPackets()) {
-                        event.setCancelled(true);
-                        player.onPacketCancel();
-                    }
-                }
-
-                lastFinishBreak = System.currentTimeMillis();
-            }
-        }
     }
 
     private void clampBalance() {

src/main/java/ac/grim/grimac/checks/impl/misc/GhostBlockMitigation.java

@@ -1,5 +1,6 @@
 package ac.grim.grimac.checks.impl.misc;
 
+import ac.grim.grimac.api.config.ConfigManager;
 import ac.grim.grimac.checks.type.BlockPlaceCheck;
 import ac.grim.grimac.player.GrimPlayer;
 import ac.grim.grimac.utils.anticheat.update.BlockPlace;
@@ -63,10 +64,9 @@ public class GhostBlockMitigation extends BlockPlaceCheck {
     }
 
     @Override
-    public void reload() {
-        super.reload();
-        allow = getConfig().getBooleanElse("exploit.allow-building-on-ghostblocks", true);
-        distance = getConfig().getIntElse("exploit.distance-to-check-for-ghostblocks", 2);
+    public void onReload(ConfigManager config) {
+        allow = config.getBooleanElse("exploit.allow-building-on-ghostblocks", true);
+        distance = config.getIntElse("exploit.distance-to-check-for-ghostblocks", 2);
 
         if (distance < 2 || distance > 4) distance = 2;
     }

src/main/java/ac/grim/grimac/checks/impl/misc/TransactionOrder.java

@@ -5,7 +5,6 @@ import ac.grim.grimac.checks.CheckData;
 import ac.grim.grimac.checks.type.PacketCheck;
 import ac.grim.grimac.player.GrimPlayer;
 
-import java.util.ArrayList;
 
 @CheckData(name = "TransactionOrder", experimental = false)
 public class TransactionOrder extends Check implements PacketCheck {
@@ -14,4 +13,4 @@ public class TransactionOrder extends Check implements PacketCheck {
         super(player);
     }
 
-}
+}

src/main/java/ac/grim/grimac/checks/impl/movement/NegativeTimerCheck.java

@@ -1,12 +1,13 @@
 package ac.grim.grimac.checks.impl.movement;
 
+import ac.grim.grimac.api.config.ConfigManager;
 import ac.grim.grimac.checks.CheckData;
 import ac.grim.grimac.checks.type.PostPredictionCheck;
 import ac.grim.grimac.player.GrimPlayer;
 import ac.grim.grimac.utils.anticheat.update.PredictionComplete;
 import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 
-@CheckData(name = "NegativeTimer", configName = "NegativeTimer", setback = 10, experimental = true)
+@CheckData(name = "NegativeTimer", configName = "NegativeTimer", setback = -1, experimental = true)
 public class NegativeTimerCheck extends TimerCheck implements PostPredictionCheck {
 
     public NegativeTimerCheck(GrimPlayer player) {
@@ -23,7 +24,7 @@ public class NegativeTimerCheck extends TimerCheck implements PostPredictionChec
 
         if (timerBalanceRealTime < lastMovementPlayerClock - clockDrift) {
             int lostMS = (int) ((System.nanoTime() - timerBalanceRealTime) / 1e6);
-            flagAndAlert("-" + lostMS);
+            if (flagAndAlert("-" + lostMS)) setbackIfAboveSetbackVL();
             timerBalanceRealTime += 50e6;
         }
     }
@@ -35,8 +36,7 @@ public class NegativeTimerCheck extends TimerCheck implements PostPredictionChec
     }
 
     @Override
-    public void reload() {
-        super.reload();
-        clockDrift = (long) (getConfig().getDoubleElse(getConfigName() + ".drift", 1200.0) * 1e6);
+    public void onReload(ConfigManager config) {
+        clockDrift = (long) (config.getDoubleElse(getConfigName() + ".drift", 1200.0) * 1e6);
     }
 }

src/main/java/ac/grim/grimac/checks/impl/movement/NoSlowA.java

@@ -1,5 +1,6 @@
 package ac.grim.grimac.checks.impl.movement;
 
+import ac.grim.grimac.api.config.ConfigManager;
 import ac.grim.grimac.checks.Check;
 import ac.grim.grimac.checks.CheckData;
 import ac.grim.grimac.checks.type.PostPredictionCheck;
@@ -7,7 +8,7 @@ import ac.grim.grimac.player.GrimPlayer;
 import ac.grim.grimac.utils.anticheat.update.PredictionComplete;
 import com.github.retrooper.packetevents.protocol.player.ClientVersion;
 
-@CheckData(name = "NoSlowA (Prediction)", configName = "NoSlowA", setback = 5)
+@CheckData(name = "NoSlowA (Prediction)", configName = "NoSlowA", description = "Was not slowed while using an item", setback = 5)
 public class NoSlowA extends Check implements PostPredictionCheck {
     double offsetToFlag;
     double bestOffset = 1;
@@ -33,8 +34,7 @@ public class NoSlowA extends Check implements PostPredictionCheck {
             }
 
             if (bestOffset > offsetToFlag) {
-                if (flaggedLastTick) {
-                    flagWithSetback();
+                if (flaggedLastTick && flagWithSetback()) {
                     alert("");
                 }
                 flaggedLastTick = true;
@@ -51,8 +51,7 @@ public class NoSlowA extends Check implements PostPredictionCheck {
     }
 
     @Override
-    public void reload() {
-        super.reload();
-        offsetToFlag = getConfig().getDoubleElse("NoSlowA.threshold", 0.001);
+    public void onReload(ConfigManager config) {
+        offsetToFlag = config.getDoubleElse("NoSlowA.threshold", 0.001);
     }
 }

src/main/java/ac/grim/grimac/checks/impl/movement/NoSlowB.java

@@ -7,7 +7,7 @@ import ac.grim.grimac.player.GrimPlayer;
 import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerFlying;
 
-@CheckData(name = "NoSlowB", setback = 5)
+@CheckData(name = "NoSlowB", description = "Sprinting with too low hunger", setback = 5)
 public class NoSlowB extends Check implements PacketCheck {
 
     public NoSlowB(GrimPlayer player) {
@@ -35,4 +35,4 @@ public class NoSlowB extends Check implements PacketCheck {
             }
         }
     }
-}
+}

src/main/java/ac/grim/grimac/checks/impl/movement/NoSlowC.java

@@ -2,50 +2,31 @@ package ac.grim.grimac.checks.impl.movement;
 
 import ac.grim.grimac.checks.Check;
 import ac.grim.grimac.checks.CheckData;
-import ac.grim.grimac.checks.type.PacketCheck;
 import ac.grim.grimac.checks.type.PostPredictionCheck;
 import ac.grim.grimac.player.GrimPlayer;
 import ac.grim.grimac.utils.anticheat.update.PredictionComplete;
-import com.github.retrooper.packetevents.event.PacketReceiveEvent;
-import com.github.retrooper.packetevents.protocol.packettype.PacketType;
+import ac.grim.grimac.utils.enums.FluidTag;
 import com.github.retrooper.packetevents.protocol.player.ClientVersion;
-import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientEntityAction;
 
-@CheckData(name = "NoSlowC", setback = 5, experimental = true)
-public class NoSlowC extends Check implements PostPredictionCheck, PacketCheck {
+@CheckData(name = "NoSlowC", description = "Sprinting while sneaking", setback = 5, experimental = true)
+public class NoSlowC extends Check implements PostPredictionCheck {
     public NoSlowC(GrimPlayer player) {
         super(player);
     }
 
-    public boolean startedSprintingBeforeSlowMovement = false;
-
-    @Override
-    public void onPacketReceive(PacketReceiveEvent event) {
-        if (event.getPacketType() == PacketType.Play.Client.ENTITY_ACTION) {
-            if (new WrapperPlayClientEntityAction(event).getAction() == WrapperPlayClientEntityAction.Action.START_SPRINTING) {
-                startedSprintingBeforeSlowMovement = false;
-            }
-        }
-    }
-
     @Override
     public void onPredictionComplete(final PredictionComplete predictionComplete) {
         if (!predictionComplete.isChecked()) return;
 
-        if (player.isSlowMovement) {
+        if (player.isSlowMovement && player.sneakingSpeedMultiplier < 0.8f) {
             ClientVersion client = player.getClientVersion();
 
             // https://bugs.mojang.com/browse/MC-152728
-            if (startedSprintingBeforeSlowMovement && client.isNewerThanOrEquals(ClientVersion.V_1_14_2)) {
-                reward();
+            if (client.isNewerThanOrEquals(ClientVersion.V_1_14_2) && client.isOlderThan(ClientVersion.V_1_21_4)) {
                 return;
             }
 
-            if (player.isSprinting
-                    // you can sneak and swim in 1.13 - 1.14.1
-                    && (!player.isSwimming || client.isNewerThan(ClientVersion.V_1_14_1) || client.isOlderThan(ClientVersion.V_1_13))
-                    && player.sneakingSpeedMultiplier < 0.8f
-            ) {
+            if (player.isSprinting && !player.isSwimming && (player.fluidOnEyes != FluidTag.WATER || client.isOlderThan(ClientVersion.V_1_21_4))) {
                 if (flagWithSetback()) alert("");
             } else reward();
         }

src/main/java/ac/grim/grimac/checks/impl/movement/NoSlowD.java

@@ -2,46 +2,32 @@ package ac.grim.grimac.checks.impl.movement;
 
 import ac.grim.grimac.checks.Check;
 import ac.grim.grimac.checks.CheckData;
-import ac.grim.grimac.checks.type.PacketCheck;
 import ac.grim.grimac.checks.type.PostPredictionCheck;
 import ac.grim.grimac.player.GrimPlayer;
 import ac.grim.grimac.utils.anticheat.update.PredictionComplete;
-import com.github.retrooper.packetevents.event.PacketReceiveEvent;
-import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.protocol.player.ClientVersion;
-import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientEntityAction;
 
-@CheckData(name = "NoSlowD", setback = 5, experimental = true)
-public class NoSlowD extends Check implements PostPredictionCheck, PacketCheck {
+@CheckData(name = "NoSlowD", description = "Sprinting while using an item", setback = 5, experimental = true)
+public class NoSlowD extends Check implements PostPredictionCheck {
     public NoSlowD(GrimPlayer player) {
         super(player);
     }
 
-    public boolean startedSprintingBeforeUse = false;
     private boolean flaggedLastTick = false;
 
-    @Override
-    public void onPacketReceive(PacketReceiveEvent event) {
-        if (event.getPacketType() == PacketType.Play.Client.ENTITY_ACTION) {
-            if (new WrapperPlayClientEntityAction(event).getAction() == WrapperPlayClientEntityAction.Action.START_SPRINTING) {
-                startedSprintingBeforeUse = false;
-            }
-        }
-    }
-
     @Override
     public void onPredictionComplete(final PredictionComplete predictionComplete) {
         if (!predictionComplete.isChecked()) return;
 
         if (player.packetStateData.isSlowedByUsingItem()) {
+            ClientVersion client = player.getClientVersion();
+
             // https://bugs.mojang.com/browse/MC-152728
-            if (startedSprintingBeforeUse && player.getClientVersion().isNewerThanOrEquals(ClientVersion.V_1_14_2)) {
-                reward();
-                flaggedLastTick = false;
+            if (client.isNewerThanOrEquals(ClientVersion.V_1_14_2) && client.isOlderThan(ClientVersion.V_1_21_4)) {
                 return;
             }
 
-            if (player.isSprinting) {
+            if (player.isSprinting && (!player.isSwimming || client.isOlderThan(ClientVersion.V_1_21_4))) {
                 if (flaggedLastTick && flagWithSetback()) alert("");
                 flaggedLastTick = true;
             } else {

src/main/java/ac/grim/grimac/checks/impl/movement/NoSlowE.java

@@ -2,7 +2,6 @@ package ac.grim.grimac.checks.impl.movement;
 
 import ac.grim.grimac.checks.Check;
 import ac.grim.grimac.checks.CheckData;
-import ac.grim.grimac.checks.type.PacketCheck;
 import ac.grim.grimac.checks.type.PostPredictionCheck;
 import ac.grim.grimac.player.GrimPlayer;
 import ac.grim.grimac.utils.anticheat.update.PredictionComplete;
@@ -12,8 +11,8 @@ import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientEn
 
 import static com.github.retrooper.packetevents.protocol.potion.PotionTypes.BLINDNESS;
 
-@CheckData(name = "NoSlowE", setback = 5, experimental = true)
-public class NoSlowE extends Check implements PostPredictionCheck, PacketCheck {
+@CheckData(name = "NoSlowE", description = "Started sprinting while having blindness", setback = 5, experimental = true)
+public class NoSlowE extends Check implements PostPredictionCheck {
     public NoSlowE(GrimPlayer player) {
         super(player);
     }

src/main/java/ac/grim/grimac/checks/impl/movement/SetbackBlocker.java

@@ -6,7 +6,6 @@ import ac.grim.grimac.player.GrimPlayer;
 import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.util.Vector3d;
-import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientInteractEntity;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerFlying;
 
 public class SetbackBlocker extends Check implements PacketCheck {

src/main/java/ac/grim/grimac/checks/impl/movement/TickTimer.java

@@ -0,0 +1,34 @@
+package ac.grim.grimac.checks.impl.movement;
+
+import ac.grim.grimac.checks.Check;
+import ac.grim.grimac.checks.CheckData;
+import ac.grim.grimac.checks.type.PostPredictionCheck;
+import ac.grim.grimac.player.GrimPlayer;
+import com.github.retrooper.packetevents.event.PacketReceiveEvent;
+import com.github.retrooper.packetevents.protocol.packettype.PacketType;
+
+
+@CheckData(name = "TickTimer", setback = 1)
+public class TickTimer extends Check implements PostPredictionCheck {
+
+    private boolean receivedTickEnd = true;
+    private int flyingPackets = 0;
+
+    public TickTimer(GrimPlayer player) {
+        super(player);
+    }
+
+    @Override
+    public void onPacketReceive(PacketReceiveEvent event) {
+        if (!player.supportsEndTick()) return;
+        if (isFlying(event.getPacketType()) && !player.packetStateData.lastPacketWasTeleport) {
+            if (!receivedTickEnd) flagAndAlert("type=flying, packets=" + flyingPackets);
+            receivedTickEnd = false;
+            flyingPackets++;
+        } else if (event.getPacketType() == PacketType.Play.Client.CLIENT_TICK_END) {
+            receivedTickEnd = true;
+            if (flyingPackets > 1) flagAndAlert("type=end, packets=" + flyingPackets);
+            flyingPackets = 0;
+        }
+    }
+}

src/main/java/ac/grim/grimac/checks/impl/movement/TimerCheck.java

@@ -1,5 +1,6 @@
 package ac.grim.grimac.checks.impl.movement;
 
+import ac.grim.grimac.api.config.ConfigManager;
 import ac.grim.grimac.checks.Check;
 import ac.grim.grimac.checks.CheckData;
 import ac.grim.grimac.checks.type.PacketCheck;
@@ -7,7 +8,6 @@ import ac.grim.grimac.player.GrimPlayer;
 import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.protocol.packettype.PacketTypeCommon;
-import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerFlying;
 
 @CheckData(name = "Timer", configName = "TimerA", setback = 10)
 public class TimerCheck extends Check implements PacketCheck {
@@ -17,11 +17,11 @@ public class TimerCheck extends Check implements PacketCheck {
     long knownPlayerClockTime = (long) (System.nanoTime() - 6e10);
     long lastMovementPlayerClock = (long) (System.nanoTime() - 6e10);
 
-    // How long should the player be able to fall back behind their ping?
+    // How long should the player be able to fall back behind their ping? (nanos)
     // Default: 120 milliseconds
-    long clockDrift = (long) 120e6;
-
-    long limitAbuseOverPing = 1000;
+    long clockDrift;
+    // At what ping should we start to limit the balance advantage? (nanos)
+    long limitAbuseOverPing;
 
     boolean hasGottenMovementAfterTransaction = false;
 
@@ -72,35 +72,31 @@ public class TimerCheck extends Check implements PacketCheck {
         doCheck(event);
     }
 
-
     public void doCheck(final PacketReceiveEvent event) {
-        final double transactionPing = player.getTransactionPing();
-        // Limit using transaction ping if over 1000ms (default)
-        final boolean needsAdjustment = limitAbuseOverPing != -1 && transactionPing >= limitAbuseOverPing;
-        final boolean wouldFailNormal = timerBalanceRealTime > System.nanoTime();
-        final boolean failsAdjusted = needsAdjustment && (timerBalanceRealTime + ((transactionPing * 1e6) - clockDrift - 50e6)) > System.nanoTime();
-        if (wouldFailNormal || failsAdjusted) {
+        if (timerBalanceRealTime > System.nanoTime()) {
             if (flag()) {
                 // Cancel the packet
                 // Only cancel if not an adjustment setback
-                if (wouldFailNormal && shouldModifyPackets()) {
+                if (shouldModifyPackets()) {
                     event.setCancelled(true);
                     player.onPacketCancel();
                 }
 
                 if (isAboveSetbackVl()) player.getSetbackTeleportUtil().executeNonSimulatingSetback();
 
-                if (wouldFailNormal) {
-                    // Only alert if we would fail without adjusted limit
-                    alert("");
-                }
+                alert("");
             }
 
             // Reset the violation by 1 movement
             timerBalanceRealTime -= 50e6;
         }
 
-        timerBalanceRealTime = Math.max(timerBalanceRealTime, lastMovementPlayerClock - clockDrift);
+        // Limit using transaction ping if over 1000ms (default)
+        long playerClock = lastMovementPlayerClock;
+        if (System.nanoTime() - playerClock > limitAbuseOverPing) {
+            playerClock = System.nanoTime() - limitAbuseOverPing;
+        }
+        timerBalanceRealTime = Math.max(timerBalanceRealTime, playerClock - clockDrift);
     }
 
     public boolean checkForTransaction(PacketTypeCommon packetType) {
@@ -110,14 +106,12 @@ public class TimerCheck extends Check implements PacketCheck {
 
     public boolean shouldCountPacketForTimer(PacketTypeCommon packetType) {
         // If not flying, or this was a teleport, or this was a duplicate 1.17 mojang stupidity packet
-        return WrapperPlayClientPlayerFlying.isFlying(packetType) &&
-                !player.packetStateData.lastPacketWasTeleport && !player.packetStateData.lastPacketWasOnePointSeventeenDuplicate;
+        return isTickPacket(packetType);
     }
 
     @Override
-    public void reload() {
-        super.reload();
-        clockDrift = (long) (getConfig().getDoubleElse(getConfigName() + ".drift", 120.0) * 1e6);
-        limitAbuseOverPing = (long) (getConfig().getDoubleElse(getConfigName() + ".ping-abuse-limit-threshold", 1000));
+    public void onReload(ConfigManager config) {
+        clockDrift = (long) (config.getDoubleElse(getConfigName() + ".drift", 120.0) * 1e6);
+        limitAbuseOverPing = (long) (config.getDoubleElse(getConfigName() + ".ping-abuse-limit-threshold", 1000) * 1e6);
     }
 }

src/main/java/ac/grim/grimac/checks/impl/multiactions/MultiActionsA.java

@@ -0,0 +1,29 @@
+package ac.grim.grimac.checks.impl.multiactions;
+
+import ac.grim.grimac.checks.Check;
+import ac.grim.grimac.checks.CheckData;
+import ac.grim.grimac.checks.type.PacketCheck;
+import ac.grim.grimac.player.GrimPlayer;
+import com.github.retrooper.packetevents.event.PacketReceiveEvent;
+import com.github.retrooper.packetevents.protocol.packettype.PacketType;
+import com.github.retrooper.packetevents.protocol.player.InteractionHand;
+import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientInteractEntity;
+
+@CheckData(name = "MultiActionsA", description = "Attacked while using an item", experimental = true)
+public class MultiActionsA extends Check implements PacketCheck {
+    public MultiActionsA(GrimPlayer player) {
+        super(player);
+    }
+
+    @Override
+    public void onPacketReceive(PacketReceiveEvent event) {
+        if (player.packetStateData.isSlowedByUsingItem() && (player.packetStateData.lastSlotSelected == player.packetStateData.getSlowedByUsingItemSlot() || player.packetStateData.eatingHand == InteractionHand.OFF_HAND) && event.getPacketType() == PacketType.Play.Client.INTERACT_ENTITY) {
+            if (new WrapperPlayClientInteractEntity(event).getAction() == WrapperPlayClientInteractEntity.InteractAction.ATTACK) {
+                if (flagAndAlert() && shouldModifyPackets()) {
+                    event.setCancelled(true);
+                    player.onPacketCancel();
+                }
+            }
+        }
+    }
+}

src/main/java/ac/grim/grimac/checks/impl/multiactions/MultiActionsB.java

@@ -0,0 +1,41 @@
+package ac.grim.grimac.checks.impl.multiactions;
+
+import ac.grim.grimac.checks.Check;
+import ac.grim.grimac.checks.CheckData;
+import ac.grim.grimac.checks.type.PacketCheck;
+import ac.grim.grimac.player.GrimPlayer;
+import com.github.retrooper.packetevents.event.PacketReceiveEvent;
+import com.github.retrooper.packetevents.protocol.packettype.PacketType;
+import com.github.retrooper.packetevents.protocol.player.ClientVersion;
+import com.github.retrooper.packetevents.protocol.player.DiggingAction;
+import com.github.retrooper.packetevents.protocol.player.InteractionHand;
+import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerDigging;
+
+import static ac.grim.grimac.events.packets.patch.ResyncWorldUtil.resyncPosition;
+
+@CheckData(name = "MultiActionsB", description = "Breaking blocks while using an item", experimental = true)
+public class MultiActionsB extends Check implements PacketCheck {
+    public MultiActionsB(GrimPlayer player) {
+        super(player);
+    }
+
+    @Override
+    public void onPacketReceive(PacketReceiveEvent event) {
+        if (player.packetStateData.isSlowedByUsingItem() && (player.packetStateData.lastSlotSelected == player.packetStateData.getSlowedByUsingItemSlot() || player.packetStateData.eatingHand == InteractionHand.OFF_HAND) && event.getPacketType() == PacketType.Play.Client.PLAYER_DIGGING) {
+            // this is vanilla on 1.7
+            if (player.getClientVersion().isOlderThanOrEquals(ClientVersion.V_1_7_10)) {
+                return;
+            }
+
+            final WrapperPlayClientPlayerDigging packet = new WrapperPlayClientPlayerDigging(event);
+
+            if (packet.getAction() == DiggingAction.START_DIGGING || packet.getAction() == DiggingAction.CANCELLED_DIGGING || packet.getAction() == DiggingAction.FINISHED_DIGGING) {
+                if (flagAndAlert() && shouldModifyPackets()) {
+                    event.setCancelled(true);
+                    player.onPacketCancel();
+                    resyncPosition(player, packet.getBlockPosition());
+                }
+            }
+        }
+    }
+}

src/main/java/ac/grim/grimac/checks/impl/multiactions/MultiActionsC.java

@@ -0,0 +1,45 @@
+package ac.grim.grimac.checks.impl.multiactions;
+
+import ac.grim.grimac.checks.Check;
+import ac.grim.grimac.checks.CheckData;
+import ac.grim.grimac.checks.type.PacketCheck;
+import ac.grim.grimac.player.GrimPlayer;
+import com.github.retrooper.packetevents.event.PacketReceiveEvent;
+import com.github.retrooper.packetevents.event.PacketSendEvent;
+import com.github.retrooper.packetevents.protocol.packettype.PacketType;
+
+@CheckData(name = "MultiActionsC", description = "Clicked in inventory while performing other actions", experimental = true)
+public class MultiActionsC extends Check implements PacketCheck {
+    public MultiActionsC(GrimPlayer player) {
+        super(player);
+    }
+
+    private boolean serverOpenedInventoryThisTick;
+
+    @Override
+    public void onPacketReceive(PacketReceiveEvent event) {
+        if (event.getPacketType() == PacketType.Play.Client.CLICK_WINDOW) {
+            String verbose = player.isSprinting && !player.isSwimming && !serverOpenedInventoryThisTick ? "sprinting" : "";
+
+            if (player.packetStateData.isSlowedByUsingItem()) {
+                verbose += (verbose.isEmpty() ? "" : ", ") + "using";
+            }
+
+            if (!verbose.isEmpty() && flagAndAlert(verbose) && shouldModifyPackets()) {
+                event.setCancelled(true);
+                player.onPacketCancel();
+            }
+        }
+
+        if (isTickPacket(event.getPacketType())) {
+            serverOpenedInventoryThisTick = false;
+        }
+    }
+
+    @Override
+    public void onPacketSend(PacketSendEvent event) {
+        if (event.getPacketType() == PacketType.Play.Server.OPEN_WINDOW) {
+            player.latencyUtils.addRealTimeTask(player.lastTransactionSent.get(), () -> serverOpenedInventoryThisTick = true);
+        }
+    }
+}

src/main/java/ac/grim/grimac/checks/impl/multiactions/MultiActionsD.java

@@ -0,0 +1,31 @@
+package ac.grim.grimac.checks.impl.multiactions;
+
+import ac.grim.grimac.checks.Check;
+import ac.grim.grimac.checks.CheckData;
+import ac.grim.grimac.checks.type.PacketCheck;
+import ac.grim.grimac.player.GrimPlayer;
+import com.github.retrooper.packetevents.event.PacketReceiveEvent;
+import com.github.retrooper.packetevents.protocol.packettype.PacketType;
+
+@CheckData(name = "MultiActionsD", description = "Closed inventory while performing other actions", experimental = true)
+public class MultiActionsD extends Check implements PacketCheck {
+    public MultiActionsD(GrimPlayer player) {
+        super(player);
+    }
+
+    @Override
+    public void onPacketReceive(PacketReceiveEvent event) {
+        if (event.getPacketType() == PacketType.Play.Client.CLOSE_WINDOW) {
+            String verbose = player.isSprinting && !player.isSwimming ? "sprinting" : "";
+
+            if (player.packetStateData.isSlowedByUsingItem()) {
+                verbose += (verbose.isEmpty() ? "" : ", ") + "using";
+            }
+
+            if (!verbose.isEmpty() && flagAndAlert(verbose) && shouldModifyPackets()) {
+                event.setCancelled(true);
+                player.onPacketCancel();
+            }
+        }
+    }
+}

src/main/java/ac/grim/grimac/checks/impl/multiactions/MultiActionsE.java

@@ -0,0 +1,32 @@
+package ac.grim.grimac.checks.impl.multiactions;
+
+import ac.grim.grimac.checks.Check;
+import ac.grim.grimac.checks.CheckData;
+import ac.grim.grimac.checks.type.PacketCheck;
+import ac.grim.grimac.player.GrimPlayer;
+import com.github.retrooper.packetevents.event.PacketReceiveEvent;
+import com.github.retrooper.packetevents.protocol.packettype.PacketType;
+import com.github.retrooper.packetevents.protocol.player.ClientVersion;
+import com.github.retrooper.packetevents.protocol.player.InteractionHand;
+
+@CheckData(name = "MultiActionsE", description = "Swinging while using an item", experimental = true)
+public class MultiActionsE extends Check implements PacketCheck {
+    public MultiActionsE(GrimPlayer player) {
+        super(player);
+    }
+
+    @Override
+    public void onPacketReceive(PacketReceiveEvent event) {
+        if (player.packetStateData.isSlowedByUsingItem() && (player.packetStateData.lastSlotSelected == player.packetStateData.getSlowedByUsingItemSlot() || player.packetStateData.eatingHand == InteractionHand.OFF_HAND) && event.getPacketType() == PacketType.Play.Client.ANIMATION) {
+            // this is possible to false on 1.7
+            if (player.getClientVersion().isOlderThanOrEquals(ClientVersion.V_1_7_10)) {
+                return;
+            }
+
+            if (flagAndAlert() && shouldModifyPackets()) {
+                event.setCancelled(true);
+                player.onPacketCancel();
+            }
+        }
+    }
+}

src/main/java/ac/grim/grimac/checks/impl/multiactions/MultiActionsF.java

@@ -0,0 +1,92 @@
+package ac.grim.grimac.checks.impl.multiactions;
+
+import ac.grim.grimac.checks.CheckData;
+import ac.grim.grimac.checks.type.BlockPlaceCheck;
+import ac.grim.grimac.player.GrimPlayer;
+import ac.grim.grimac.utils.anticheat.update.BlockPlace;
+import ac.grim.grimac.utils.anticheat.update.PredictionComplete;
+import com.github.retrooper.packetevents.event.PacketReceiveEvent;
+import com.github.retrooper.packetevents.protocol.packettype.PacketType;
+import com.github.retrooper.packetevents.protocol.player.ClientVersion;
+import com.github.retrooper.packetevents.protocol.player.DiggingAction;
+import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerDigging;
+import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerFlying;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import static ac.grim.grimac.events.packets.patch.ResyncWorldUtil.resyncPosition;
+
+@CheckData(name = "MultiActionsF", description = "Interacting with a block and an entity in the same tick", experimental = true)
+public class MultiActionsF extends BlockPlaceCheck {
+    public MultiActionsF(GrimPlayer player) {
+        super(player);
+    }
+
+    private final List<String> flags = new ArrayList<>();
+    boolean entity, block;
+
+    @Override
+    public void onBlockPlace(BlockPlace place) {
+        block = true;
+        if (entity) {
+            if (player.getClientVersion().isOlderThanOrEquals(ClientVersion.V_1_8)) {
+                if (flagAndAlert("place") && shouldModifyPackets() && shouldCancel()) {
+                    place.resync();
+                }
+            } else {
+                flags.add("place");
+            }
+        }
+    }
+
+    @Override
+    public void onPacketReceive(PacketReceiveEvent event) {
+        if (event.getPacketType() == PacketType.Play.Client.INTERACT_ENTITY) {
+            entity = true;
+            if (block) {
+                if (player.getClientVersion().isOlderThanOrEquals(ClientVersion.V_1_8)) {
+                    if (flagAndAlert("entity") && shouldModifyPackets()) {
+                        event.setCancelled(true);
+                        player.onPacketCancel();
+                    }
+                } else {
+                    flags.add("entity");
+                }
+            }
+        }
+
+        if (event.getPacketType() == PacketType.Play.Client.PLAYER_DIGGING) {
+            WrapperPlayClientPlayerDigging packet = new WrapperPlayClientPlayerDigging(event);
+            if (packet.getAction() == DiggingAction.START_DIGGING || packet.getAction() == DiggingAction.FINISHED_DIGGING) {
+                block = true;
+                if (entity) {
+                    if (player.getClientVersion().isOlderThanOrEquals(ClientVersion.V_1_8)) {
+                        if (flagAndAlert("dig") && shouldModifyPackets()) {
+                            event.setCancelled(true);
+                            player.onPacketCancel();
+                            resyncPosition(player, packet.getBlockPosition());
+                        }
+                    } else {
+                        flags.add("dig");
+                    }
+                }
+            }
+        }
+
+        if (WrapperPlayClientPlayerFlying.isFlying(event.getPacketType()) && !player.packetStateData.lastPacketWasTeleport && !player.packetStateData.lastPacketWasOnePointSeventeenDuplicate) {
+            block = entity = false;
+        }
+    }
+
+    @Override
+    public void onPredictionComplete(PredictionComplete predictionComplete) {
+        if (player.getClientVersion().isNewerThan(ClientVersion.V_1_8) && player.isTickingReliablyFor(3) && !player.uncertaintyHandler.lastVehicleSwitch.hasOccurredSince(0)) {
+            for (String verbose : flags) {
+                flagAndAlert(verbose);
+            }
+        }
+
+        flags.clear();
+    }
+}

src/main/java/ac/grim/grimac/checks/impl/post/Post.java

@@ -15,18 +15,16 @@ import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.protocol.packettype.PacketTypeCommon;
 import com.github.retrooper.packetevents.protocol.player.ClientVersion;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientEntityAction;
-import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerFlying;
 import com.github.retrooper.packetevents.wrapper.play.server.WrapperPlayServerEntityAnimation;
 
 import java.util.ArrayDeque;
-import java.util.ArrayList;
 import java.util.List;
 import java.util.Locale;
 
 import static com.github.retrooper.packetevents.protocol.packettype.PacketType.Play.Client.*;
 
 @CheckData(name = "Post")
-public class PostCheck extends Check implements PacketCheck, PostPredictionCheck {
+public class Post extends Check implements PacketCheck, PostPredictionCheck {
     private final ArrayDeque<PacketTypeCommon> post = new ArrayDeque<>();
     // Due to 1.9+ missing the idle packet, we must queue flags
     // 1.8 clients will have the same logic for simplicity, although it's not needed
@@ -34,7 +32,7 @@ public class PostCheck extends Check implements PacketCheck, PostPredictionCheck
     private boolean sentFlying = false;
     private int isExemptFromSwingingCheck = Integer.MIN_VALUE;
 
-    public PostCheck(GrimPlayer playerData) {
+    public Post(GrimPlayer playerData) {
         super(playerData);
     }
 
@@ -44,7 +42,7 @@ public class PostCheck extends Check implements PacketCheck, PostPredictionCheck
             // Okay, the user might be cheating, let's double check
             // 1.8 clients have the idle packet, and this shouldn't false on 1.8 clients
             // 1.9+ clients have predictions, which will determine if hidden tick skipping occurred
-            if (player.isTickingReliablyFor(3)) {
+            if (player.isTickingReliablyFor(3) && !player.uncertaintyHandler.lastVehicleSwitch.hasOccurredSince(0)) {
                 for (String flag : flags) {
                     flagAndAlert(flag);
                 }
@@ -69,12 +67,7 @@ public class PostCheck extends Check implements PacketCheck, PostPredictionCheck
 
     @Override
     public void onPacketReceive(final PacketReceiveEvent event) {
-        if (WrapperPlayClientPlayerFlying.isFlying(event.getPacketType())) {
-            // Don't count teleports or duplicates as movements
-            if (player.packetStateData.lastPacketWasTeleport || player.packetStateData.lastPacketWasOnePointSeventeenDuplicate) {
-                return;
-            }
-
+        if (isTickPacket(event.getPacketType())) { // Don't count teleports or duplicates as movements
             post.clear();
             sentFlying = true;
         } else {
@@ -87,6 +80,7 @@ public class PostCheck extends Check implements PacketCheck, PostPredictionCheck
                 post.clear();
                 sentFlying = false;
             } else if (PLAYER_ABILITIES.equals(packetType)
+                    || (HELD_ITEM_CHANGE.equals(packetType) && player.getClientVersion().isNewerThanOrEquals(ClientVersion.V_1_8))
                     || INTERACT_ENTITY.equals(packetType) || PLAYER_BLOCK_PLACEMENT.equals(packetType)
                     || USE_ITEM.equals(packetType) || PLAYER_DIGGING.equals(packetType)) {
                 if (sentFlying) post.add(event.getPacketType());

src/main/java/ac/grim/grimac/checks/impl/prediction/OffsetHandler.java

@@ -1,5 +1,6 @@
 package ac.grim.grimac.checks.impl.prediction;
 
+import ac.grim.grimac.api.config.ConfigManager;
 import ac.grim.grimac.api.events.CompletePredictionEvent;
 import ac.grim.grimac.checks.Check;
 import ac.grim.grimac.checks.CheckData;
@@ -99,14 +100,12 @@ public class OffsetHandler extends Check implements PostPredictionCheck {
     }
 
     @Override
-    public void reload() {
-        super.reload();
-        setbackDecayMultiplier = getConfig().getDoubleElse("Simulation.setback-decay-multiplier", 0.999);
-        threshold = getConfig().getDoubleElse("Simulation.threshold", 0.001);
-        immediateSetbackThreshold = getConfig().getDoubleElse("Simulation.immediate-setback-threshold", 0.1);
-        maxAdvantage = getConfig().getDoubleElse("Simulation.max-advantage", 1);
-        maxCeiling = getConfig().getDoubleElse("Simulation.max-ceiling", 4);
-
+    public void onReload(ConfigManager config) {
+        setbackDecayMultiplier = config.getDoubleElse("Simulation.setback-decay-multiplier", 0.999);
+        threshold = config.getDoubleElse("Simulation.threshold", 0.001);
+        immediateSetbackThreshold = config.getDoubleElse("Simulation.immediate-setback-threshold", 0.1);
+        maxAdvantage = config.getDoubleElse("Simulation.max-advantage", 1);
+        maxCeiling = config.getDoubleElse("Simulation.max-ceiling", 4);
         if (maxAdvantage == -1) maxAdvantage = Double.MAX_VALUE;
         if (immediateSetbackThreshold == -1) immediateSetbackThreshold = Double.MAX_VALUE;
     }

src/main/java/ac/grim/grimac/checks/impl/scaffolding/AirLiquidPlace.java

@@ -1,9 +1,12 @@
 package ac.grim.grimac.checks.impl.scaffolding;
 
+import ac.grim.grimac.GrimAPI;
+import ac.grim.grimac.api.config.ConfigManager;
 import ac.grim.grimac.checks.CheckData;
 import ac.grim.grimac.checks.type.BlockPlaceCheck;
 import ac.grim.grimac.player.GrimPlayer;
 import ac.grim.grimac.utils.anticheat.update.BlockPlace;
+import ac.grim.grimac.utils.change.BlockModification;
 import ac.grim.grimac.utils.nmsutil.Materials;
 import com.github.retrooper.packetevents.protocol.player.GameMode;
 import com.github.retrooper.packetevents.protocol.world.states.type.StateType;
@@ -15,12 +18,65 @@ public class AirLiquidPlace extends BlockPlaceCheck {
         super(player);
     }
 
+    /*
+     * This check has been plagued by falses for ages, and I've finally figured it out.
+     * When breaking and placing on the same tick in the same tick, I believe the vanilla client always sends DIGGING ACTION packets first
+     * This check's falses all seem to stem from processing DiggingAction.START_DIGGING before PacketType.Play.Client.PLAYER_BLOCK_PLACEMENT in the same tick
+     * Since we process the break first, when we go to process the place it looks like the player placed against air in the async world
+     *
+     * We will often see:
+     *     Async world updated: short_grass -> air at X: -32, Y: 69, Z: -240, tick 0, cause/source: DiggingAction.START_DIGGING
+     *     AirLiquidPlace Check: Block state at X: -32, Y: 69, Z: -240 is air (valid: false), tick +0-1, cause/source: PacketType.Play.Client.PLAYER_BLOCK_PLACEMENT <---- previously falsed here
+     *     Async world updated: air -> short_grass at X: -32, Y: 69, Z: -240, tick +3-4, cause: realtime task in applyBlockChanges(List<Vector3i> toApplyBlocks) source: PacketType.Play.Client.PONG
+     *     Async world updated: short_grass -> air at X: -32, Y: 69, Z: -240, tick +0-1, cause: handleNettySyncTransaction(LatencyUtils.java:56) source: PacketType.Play.Client.PONG
+     *
+     * In addition, it is possible for:
+     *     Async world updated: short_grass -> air at X: -49, Y: 69, Z: -190, tick 0, cause: realtime task in applyBlockChanges(List<Vector3i> toApplyBlocks) source: PacketType.Play.Client.PONG
+     *     AirLiquidPlace Check: Block state at X: -49, Y: 69, Z: -190 is air (valid=false), tick 0 <--- false due to change from applyBlockChanges()
+     *     Async world updated: grass_block[snowy=false] -> grass_block[snowy=false] at X: -49, Y: 69, Z: -189, tick 0, cause: handleNettySyncTransaction(LatencyUtils.java:56) source: PacketType.Play.Client.PONG
+     *
+     * And in even more rare cases:
+     *     Async world updated: air -> air at X: -51, Y: 71, Z: -179, tick 0, cause: handleNettySyncTransaction(LatencyUtils.java:56) source: PacketType.Play.Client.PONG
+     *     AirLiquidPlace Check: Block state at X: -49, Y: 70, Z: -180 is short_grass (valid=true), tick 0
+     *     Async world updated: short_grass -> air at X: -49, Y: 70, Z: -180, tick 1, cause/source: DiggingAction.START_DIGGING <--- double dig here (see my BadPacketsX patch) this is legit behaviour. Can only be up to 2 in 1 tick though.
+     *     Async world updated: air -> short_grass at X: -49, Y: 70, Z: -180, tick 1, cause/source: DiggingAction.START_DIGGING
+     *     Async world updated: short_grass -> air at X: -51, Y: 70, Z: -179, tick 1, cause: realtime task in applyBlockChanges(List<Vector3i> toApplyBlocks) source: PacketType.Play.Client.PONG
+     *     AirLiquidPlace Check: Block state at X: -49, Y: 70, Z: -179 is air (valid=false), tick 2 <--- falses here due to double dig if we only check the latest changed blockstate. We have to check all changes at the location in same tick.
+     *     AirLiquidPlace Check: Block state at X: -49, Y: 70, Z: -179 is air (valid=true), tick 2
+     *
+     *     All of which previously would've caused a false.
+     *     To solve this we store recently changed blocks caused by DiggingAction.START_DIGGING (instant breaking) and check against the old block.
+     *     Lots of other checks have similar issues, and with the new player.blockHistory we can patch those.
+     *
+     * So that's it right? It's unfalsable?
+     *     Very close but not quite. Vanilla's client game desyncs, especially on a laggy connection where a player is breaking and placing grass 20 cps/sec in the same tick
+     *     it is possible for short grass to be interacted with even if server-side the block is air much later, and it won't be accounted for because the modification isn't recent.
+     *     This is incredibly rare, unreliable and is only triggerable if you intentionally want to false the check. I consider a violation lvl of 2-3 to be reliable
+     *     and 5-6 to be autobannable (if you don't care about people who are deliberately trying to get themselves false banned)
+     */
     @Override
     public void onBlockPlace(final BlockPlace place) {
         if (player.gamemode == GameMode.CREATIVE) return;
+
         Vector3i blockPos = place.getPlacedAgainstBlockLocation();
         StateType placeAgainst = player.compensatedWorld.getStateTypeAt(blockPos.getX(), blockPos.getY(), blockPos.getZ());
 
+        int currentTick = GrimAPI.INSTANCE.getTickManager().currentTick;
+        // this is actual more lenient then we need to be, We can check up to 1 ticks for all changes at location sand up to 0 ticks for first change
+        // But for such tiny differences in legitness its not worth it.
+        Iterable<BlockModification> blockModifications = player.blockHistory.getRecentModifications((blockModification) -> currentTick - blockModification.getTick() < 2
+                && blockPos.equals(blockModification.getLocation())
+                && (blockModification.getCause() == BlockModification.Cause.START_DIGGING || blockModification.getCause() == BlockModification.Cause.HANDLE_NETTY_SYNC_TRANSACTION));
+
+        // Check if old block from instant breaking in same tick as the current placement was valid
+        // There should only be one block here for legit clients
+        for (BlockModification blockModification : blockModifications) {
+            StateType stateType = blockModification.getOldBlockContents().getType();
+            if (!stateType.isAir() && !Materials.isNoPlaceLiquid(stateType)) {
+                return;
+            }
+        }
+
         if (placeAgainst.isAir() || Materials.isNoPlaceLiquid(placeAgainst)) { // fail
             if (flagAndAlert() && shouldModifyPackets() && shouldCancel()) {
                 place.resync();
@@ -29,8 +85,7 @@ public class AirLiquidPlace extends BlockPlaceCheck {
     }
 
     @Override
-    public void reload() {
-        super.reload();
-        this.cancelVL = getConfig().getIntElse(getConfigName() + ".cancelVL", 0);
+    public void onReload(ConfigManager config) {
+        this.cancelVL = config.getIntElse(getConfigName() + ".cancelVL", 0);
     }
 }

src/main/java/ac/grim/grimac/checks/impl/scaffolding/FarPlace.java

@@ -7,13 +7,11 @@ import ac.grim.grimac.utils.anticheat.update.BlockPlace;
 import ac.grim.grimac.utils.collisions.datatypes.SimpleCollisionBox;
 import ac.grim.grimac.utils.math.VectorUtils;
 import com.github.retrooper.packetevents.protocol.attribute.Attributes;
-import com.github.retrooper.packetevents.protocol.player.ClientVersion;
-import com.github.retrooper.packetevents.protocol.player.GameMode;
 import com.github.retrooper.packetevents.protocol.world.states.type.StateTypes;
 import com.github.retrooper.packetevents.util.Vector3i;
 import org.bukkit.util.Vector;
 
-@CheckData(name = "FarPlace")
+@CheckData(name = "FarPlace", description = "Placing blocks from too far away")
 public class FarPlace extends BlockPlaceCheck {
     public FarPlace(GrimPlayer player) {
         super(player);
@@ -26,7 +24,8 @@ public class FarPlace extends BlockPlaceCheck {
         if (place.getMaterial() == StateTypes.SCAFFOLDING) return;
 
         double min = Double.MAX_VALUE;
-        for (double d : player.getPossibleEyeHeights()) {
+        final double[] possibleEyeHeights = player.getPossibleEyeHeights();
+        for (double d : possibleEyeHeights) {
             SimpleCollisionBox box = new SimpleCollisionBox(blockPos);
             Vector eyes = new Vector(player.x, player.y + d, player.z);
             Vector best = VectorUtils.cutBoxToVector(eyes, box);
@@ -35,7 +34,7 @@ public class FarPlace extends BlockPlaceCheck {
 
         // getPickRange() determines this?
         // With 1.20.5+ the new attribute determines creative mode reach using a modifier
-        double maxReach = player.compensatedEntities.getSelf().getAttributeValue(Attributes.PLAYER_BLOCK_INTERACTION_RANGE);
+        double maxReach = player.compensatedEntities.getSelf().getAttributeValue(Attributes.BLOCK_INTERACTION_RANGE);
         double threshold = player.getMovementThreshold();
         maxReach += Math.hypot(threshold, threshold);
 

src/main/java/ac/grim/grimac/checks/impl/scaffolding/InvalidPlaceB.java

@@ -7,7 +7,7 @@ import ac.grim.grimac.utils.anticheat.update.BlockPlace;
 import com.github.retrooper.packetevents.PacketEvents;
 import com.github.retrooper.packetevents.manager.server.ServerVersion;
 
-@CheckData(name = "InvalidPlaceB")
+@CheckData(name = "InvalidPlaceB", description = "Sent impossible block face id")
 public class InvalidPlaceB extends BlockPlaceCheck {
     public InvalidPlaceB(GrimPlayer player) {
         super(player);

src/main/java/ac/grim/grimac/checks/impl/scaffolding/MultiPlace.java

@@ -0,0 +1,73 @@
+package ac.grim.grimac.checks.impl.scaffolding;
+
+import ac.grim.grimac.checks.CheckData;
+import ac.grim.grimac.checks.type.BlockPlaceCheck;
+import ac.grim.grimac.player.GrimPlayer;
+import ac.grim.grimac.utils.anticheat.MessageUtil;
+import ac.grim.grimac.utils.anticheat.update.BlockPlace;
+import ac.grim.grimac.utils.anticheat.update.PredictionComplete;
+import com.github.retrooper.packetevents.event.PacketReceiveEvent;
+import com.github.retrooper.packetevents.protocol.player.ClientVersion;
+import com.github.retrooper.packetevents.protocol.world.BlockFace;
+import com.github.retrooper.packetevents.util.Vector3f;
+import com.github.retrooper.packetevents.util.Vector3i;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@CheckData(name = "MultiPlace", experimental = true)
+public class MultiPlace extends BlockPlaceCheck {
+    public MultiPlace(GrimPlayer player) {
+        super(player);
+    }
+
+    private final List<String> flags = new ArrayList<>();
+
+    private boolean hasPlaced;
+    private BlockFace lastFace;
+    private Vector3f lastCursor;
+    private Vector3i lastPos;
+
+    @Override
+    public void onBlockPlace(final BlockPlace place) {
+        final BlockFace face = place.getDirection();
+        final Vector3f cursor = place.getCursor();
+        final Vector3i pos = place.getPlacedAgainstBlockLocation();
+
+        if (hasPlaced && (face != lastFace || !cursor.equals(lastCursor) || !pos.equals(lastPos))) {
+            final String verbose = "face=" + face + ", lastFace=" + lastFace
+                    + ", cursor=" + MessageUtil.toUnlabledString(cursor) + ", lastCursor=" + MessageUtil.toUnlabledString(lastCursor)
+                    + ", pos=" + MessageUtil.toUnlabledString(pos) + ", lastPos=" + MessageUtil.toUnlabledString(lastPos);
+            if (player.getClientVersion().isOlderThanOrEquals(ClientVersion.V_1_8)) {
+                if (flagAndAlert(verbose) && shouldModifyPackets() && shouldCancel()) {
+                    place.resync();
+                }
+            } else {
+                flags.add(verbose);
+            }
+        }
+
+        lastFace = face;
+        lastCursor = cursor;
+        lastPos = pos;
+        hasPlaced = true;
+    }
+
+    @Override
+    public void onPacketReceive(PacketReceiveEvent event) {
+        if (isTickPacket(event.getPacketType())) {
+            hasPlaced = false;
+        }
+    }
+
+    @Override
+    public void onPredictionComplete(PredictionComplete predictionComplete) {
+        if (player.getClientVersion().isNewerThan(ClientVersion.V_1_8) && player.isTickingReliablyFor(3) && !player.uncertaintyHandler.lastVehicleSwitch.hasOccurredSince(0)) {
+            for (String verbose : flags) {
+                flagAndAlert(verbose);
+            }
+        }
+
+        flags.clear();
+    }
+}

src/main/java/ac/grim/grimac/checks/impl/scaffolding/PositionPlace.java

@@ -8,7 +8,6 @@ import ac.grim.grimac.utils.collisions.datatypes.SimpleCollisionBox;
 import com.github.retrooper.packetevents.protocol.player.ClientVersion;
 import com.github.retrooper.packetevents.protocol.world.states.type.StateTypes;
 
-import java.util.Collections;
 
 @CheckData(name = "PositionPlace")
 public class PositionPlace extends BlockPlaceCheck {
@@ -28,8 +27,13 @@ public class PositionPlace extends BlockPlaceCheck {
         // Each position represents the best case scenario to have clicked
         //
         // We will now calculate the most optimal position for the player's head to be in
-        double minEyeHeight = Collections.min(player.getPossibleEyeHeights());
-        double maxEyeHeight = Collections.max(player.getPossibleEyeHeights());
+        final double[] possibleEyeHeights = player.getPossibleEyeHeights();
+        double minEyeHeight = Double.MAX_VALUE;
+        double maxEyeHeight = Double.MIN_VALUE;
+        for (double height : possibleEyeHeights) {
+            minEyeHeight = Math.min(minEyeHeight, height);
+            maxEyeHeight = Math.max(maxEyeHeight, height);
+        }
         // I love the idle packet, why did you remove it mojang :(
         // Don't give 0.03 lenience if the player is a 1.8 player and we know they couldn't have 0.03'd because idle packet
         double movementThreshold = !player.packetStateData.didLastMovementIncludePosition || player.getClientVersion().isNewerThanOrEquals(ClientVersion.V_1_9) ? player.getMovementThreshold() : 0;
@@ -44,27 +48,21 @@ public class PositionPlace extends BlockPlaceCheck {
 
         // So now we have the player's possible eye positions
         // So then look at the face that the player has clicked
-        boolean flag = false;
-        switch (place.getDirection()) {
-            case NORTH: // Z- face
-                flag = eyePositions.minZ > combined.minZ;
-                break;
-            case SOUTH: // Z+ face
-                flag = eyePositions.maxZ < combined.maxZ;
-                break;
-            case EAST: // X+ face
-                flag = eyePositions.maxX < combined.maxX;
-                break;
-            case WEST: // X- face
-                flag = eyePositions.minX > combined.minX;
-                break;
-            case UP: // Y+ face
-                flag = eyePositions.maxY < combined.maxY;
-                break;
-            case DOWN: // Y- face
-                flag = eyePositions.minY > combined.minY;
-                break;
-        }
+        boolean flag = switch (place.getDirection()) {
+            case NORTH -> // Z- face
+                    eyePositions.minZ > combined.minZ;
+            case SOUTH -> // Z+ face
+                    eyePositions.maxZ < combined.maxZ;
+            case EAST -> // X+ face
+                    eyePositions.maxX < combined.maxX;
+            case WEST -> // X- face
+                    eyePositions.minX > combined.minX;
+            case UP -> // Y+ face
+                    eyePositions.maxY < combined.maxY;
+            case DOWN -> // Y- face
+                    eyePositions.minY > combined.minY;
+            default -> false;
+        };
 
         if (flag) {
             if (flagAndAlert() && shouldModifyPackets() && shouldCancel()) {

src/main/java/ac/grim/grimac/checks/impl/scaffolding/RotationPlace.java

@@ -71,13 +71,19 @@ public class RotationPlace extends BlockPlaceCheck {
         SimpleCollisionBox box = new SimpleCollisionBox(place.getPlacedAgainstBlockLocation());
 
         List<Vector3f> possibleLookDirs = new ArrayList<>(Arrays.asList(
-                new Vector3f(player.lastXRot, player.yRot, 0),
-                new Vector3f(player.xRot, player.yRot, 0)
+                new Vector3f(player.xRot, player.yRot, 0),
+                new Vector3f(player.lastXRot, player.yRot, 0)
         ));
 
+        final double[] possibleEyeHeights = player.getPossibleEyeHeights();
+
         // Start checking if player is in the block
-        double minEyeHeight = Collections.min(player.getPossibleEyeHeights());
-        double maxEyeHeight = Collections.max(player.getPossibleEyeHeights());
+        double minEyeHeight = Double.MAX_VALUE;
+        double maxEyeHeight = Double.MIN_VALUE;
+        for (double height : possibleEyeHeights) {
+            minEyeHeight = Math.min(minEyeHeight, height);
+            maxEyeHeight = Math.max(maxEyeHeight, height);
+        }
 
         SimpleCollisionBox eyePositions = new SimpleCollisionBox(player.x, player.y + minEyeHeight, player.z, player.x, player.y + maxEyeHeight, player.z);
         eyePositions.expand(player.getMovementThreshold());
@@ -98,8 +104,8 @@ public class RotationPlace extends BlockPlaceCheck {
             possibleLookDirs = Collections.singletonList(new Vector3f(player.xRot, player.yRot, 0));
         }
 
-        final double distance = player.compensatedEntities.getSelf().getAttributeValue(Attributes.PLAYER_BLOCK_INTERACTION_RANGE);
-        for (double d : player.getPossibleEyeHeights()) {
+        final double distance = player.compensatedEntities.getSelf().getAttributeValue(Attributes.BLOCK_INTERACTION_RANGE);
+        for (double d : possibleEyeHeights) {
             for (Vector3f lookDir : possibleLookDirs) {
                 // x, y, z are correct for the block placement even after post tick because of code elsewhere
                 Vector3d starting = new Vector3d(player.x, player.y + d, player.z);
@@ -107,7 +113,7 @@ public class RotationPlace extends BlockPlaceCheck {
                 Ray trace = new Ray(player, starting.getX(), starting.getY(), starting.getZ(), lookDir.getX(), lookDir.getY());
                 Pair<Vector, BlockFace> intercept = ReachUtils.calculateIntercept(box, trace.getOrigin(), trace.getPointAtDistance(distance));
 
-                if (intercept.getFirst() != null) return true;
+                if (intercept.first() != null) return true;
             }
         }
 

src/main/java/ac/grim/grimac/checks/impl/velocity/ExplosionHandler.java

@@ -1,5 +1,6 @@
 package ac.grim.grimac.checks.impl.velocity;
 
+import ac.grim.grimac.api.config.ConfigManager;
 import ac.grim.grimac.checks.Check;
 import ac.grim.grimac.checks.CheckData;
 import ac.grim.grimac.checks.type.PostPredictionCheck;
@@ -7,18 +8,19 @@ import ac.grim.grimac.player.GrimPlayer;
 import ac.grim.grimac.utils.anticheat.update.PredictionComplete;
 import ac.grim.grimac.utils.data.VectorData;
 import ac.grim.grimac.utils.data.VelocityData;
+import com.github.retrooper.packetevents.PacketEvents;
 import com.github.retrooper.packetevents.event.PacketSendEvent;
+import com.github.retrooper.packetevents.manager.server.ServerVersion;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.protocol.world.states.WrappedBlockState;
 import com.github.retrooper.packetevents.protocol.world.states.defaulttags.BlockTags;
 import com.github.retrooper.packetevents.protocol.world.states.type.StateType;
 import com.github.retrooper.packetevents.protocol.world.states.type.StateTypes;
 import com.github.retrooper.packetevents.protocol.world.states.type.StateValue;
-import com.github.retrooper.packetevents.util.Vector3f;
+import com.github.retrooper.packetevents.util.Vector3d;
 import com.github.retrooper.packetevents.util.Vector3i;
 import com.github.retrooper.packetevents.wrapper.play.server.WrapperPlayServerExplosion;
 import lombok.Getter;
-import org.bukkit.Bukkit;
 import org.bukkit.util.Vector;
 import org.jetbrains.annotations.Nullable;
 
@@ -47,59 +49,70 @@ public class ExplosionHandler extends Check implements PostPredictionCheck {
         if (event.getPacketType() == PacketType.Play.Server.EXPLOSION) {
             WrapperPlayServerExplosion explosion = new WrapperPlayServerExplosion(event);
 
-            Vector3f velocity = explosion.getPlayerMotion();
-
-            final @Nullable WrapperPlayServerExplosion.BlockInteraction blockInteraction = explosion.getBlockInteraction();
-            final boolean shouldDestroy = blockInteraction != WrapperPlayServerExplosion.BlockInteraction.KEEP_BLOCKS;
-            if (!explosion.getRecords().isEmpty() && shouldDestroy) {
-                player.sendTransaction();
-
-                player.latencyUtils.addRealTimeTask(player.lastTransactionSent.get(), () -> {
-                    for (Vector3i record : explosion.getRecords()) {
-                        // Null OR not flip redstone blocks, then set to air
-                        if (blockInteraction != WrapperPlayServerExplosion.BlockInteraction.TRIGGER_BLOCKS) {
-                            player.compensatedWorld.updateBlock(record.x, record.y, record.z, 0);
-                        } else {
-                            // We need to flip redstone blocks, or do special things with other blocks
-                            final WrappedBlockState state = player.compensatedWorld.getWrappedBlockStateAt(record);
-                            final StateType type = state.getType();
-                            if (BlockTags.CANDLES.contains(type) || BlockTags.CANDLE_CAKES.contains(type)) {
-                                state.setLit(false);
-                                continue;
-                            } else if (type == StateTypes.BELL) {
-                                // Does this affect anything? I don't know, I don't see anything that relies on whether a bell is ringing.
-                                continue;
-                            }
-
-                            // Otherwise try and flip/open it.
-                            final Object poweredValue = state.getInternalData().get(StateValue.POWERED);
-                            final boolean canFlip = (poweredValue != null && !(Boolean) poweredValue) || type == StateTypes.LEVER;
-                            if (canFlip) {
-                                player.compensatedWorld.tickOpenable(record.x, record.y, record.z);
-                            }
-                        }
-                    }
-                });
+            // Since 1.21.2, the server will instead send these changes via block change packets
+            final boolean hasBlocks = PacketEvents.getAPI().getServerManager().getVersion().isOlderThan(ServerVersion.V_1_21_2);
+            if (hasBlocks) {
+                this.handleBlockExplosions(explosion);
             }
 
-            if (velocity.x != 0 || velocity.y != 0 || velocity.z != 0) {
+            Vector3d velocity = explosion.getKnockback();
+            if (velocity != null && (velocity.x != 0 || velocity.y != 0 || velocity.z != 0)) {
                 // No need to spam transactions
-                if (explosion.getRecords().isEmpty()) player.sendTransaction();
+                if (!hasBlocks || explosion.getRecords().isEmpty()) player.sendTransaction();
                 addPlayerExplosion(player.lastTransactionSent.get(), velocity);
                 event.getTasksAfterSend().add(player::sendTransaction);
             }
         }
     }
 
+    private void handleBlockExplosions(WrapperPlayServerExplosion explosion) {
+        final @Nullable WrapperPlayServerExplosion.BlockInteraction blockInteraction = explosion.getBlockInteraction();
+        final boolean shouldDestroy = blockInteraction != WrapperPlayServerExplosion.BlockInteraction.KEEP_BLOCKS;
+        if (explosion.getRecords().isEmpty() || !shouldDestroy) {
+            return;
+        }
+
+        player.sendTransaction();
+
+        player.latencyUtils.addRealTimeTask(player.lastTransactionSent.get(), () -> {
+            for (Vector3i record : explosion.getRecords()) {
+                // Null OR not flip redstone blocks, then set to air
+                if (blockInteraction != WrapperPlayServerExplosion.BlockInteraction.TRIGGER_BLOCKS) {
+                    player.compensatedWorld.updateBlock(record.x, record.y, record.z, 0);
+                } else {
+                    // We need to flip redstone blocks, or do special things with other blocks
+                    final WrappedBlockState state = player.compensatedWorld.getWrappedBlockStateAt(record);
+                    final StateType type = state.getType();
+                    if (BlockTags.CANDLES.contains(type) || BlockTags.CANDLE_CAKES.contains(type)) {
+                        state.setLit(false);
+                        continue;
+                    } else if (type == StateTypes.BELL) {
+                        // Does this affect anything? I don't know, I don't see anything that relies on whether a bell is ringing.
+                        continue;
+                    }
+
+                    // Otherwise try and flip/open it.
+                    final Object poweredValue = state.getInternalData().get(StateValue.POWERED);
+                    final boolean canFlip = (poweredValue != null && !(Boolean) poweredValue) || type == StateTypes.LEVER;
+                    if (canFlip) {
+                        player.compensatedWorld.tickOpenable(record.x, record.y, record.z);
+                    }
+                }
+            }
+        });
+    }
+
     public VelocityData getFutureExplosion() {
         // Chronologically in the future
-        if (firstBreadMap.size() > 0) {
+        if (!firstBreadMap.isEmpty()) {
             return firstBreadMap.peek();
         }
+
         // Less in the future
         if (lastExplosionsKnownTaken != null) {
             return lastExplosionsKnownTaken;
         }
+
         // Uncertain, might be in the future
         if (player.firstBreadExplosion != null && player.likelyExplosions == null) {
             return player.firstBreadExplosion;
@@ -120,7 +133,7 @@ public class ExplosionHandler extends Check implements PostPredictionCheck {
         return (player.likelyExplosions != null && player.likelyExplosions.offset > offsetToFlag) || (player.firstBreadExplosion != null && player.firstBreadExplosion.offset > offsetToFlag);
     }
 
-    public void addPlayerExplosion(int breadOne, Vector3f explosion) {
+    public void addPlayerExplosion(int breadOne, Vector3d explosion) {
         firstBreadMap.add(new VelocityData(-1, breadOne, player.getSetbackTeleportUtil().isSendingSetback, new Vector(explosion.getX(), explosion.getY(), explosion.getZ())));
     }
 
@@ -256,12 +269,10 @@ public class ExplosionHandler extends Check implements PostPredictionCheck {
     }
 
     @Override
-    public void reload() {
-        super.reload();
-
-        offsetToFlag = getConfig().getDoubleElse("Explosion.threshold", 0.00001);
-        setbackVL = getConfig().getDoubleElse("Explosion.setbackvl", 10);
-
+    public void onReload(ConfigManager config) {
+        offsetToFlag = config.getDoubleElse("Explosion.threshold", 0.00001);
+        setbackVL = config.getDoubleElse("Explosion.setbackvl", 10);
         if (setbackVL == -1) setbackVL = Double.MAX_VALUE;
     }
+
 }

src/main/java/ac/grim/grimac/checks/impl/velocity/KnockbackHandler.java

@@ -1,6 +1,7 @@
 package ac.grim.grimac.checks.impl.velocity;
 
 import ac.grim.grimac.GrimAPI;
+import ac.grim.grimac.api.config.ConfigManager;
 import ac.grim.grimac.checks.Check;
 import ac.grim.grimac.checks.CheckData;
 import ac.grim.grimac.checks.type.PostPredictionCheck;
@@ -65,6 +66,7 @@ public class KnockbackHandler extends Check implements PostPredictionCheck {
             if (playerVelocity.getY() == -0.04) {
                 velocity.setVelocity(playerVelocity.add(new Vector3d(0, 1 / 8000D, 0)));
                 playerVelocity = velocity.getVelocity();
+                event.markForReEncode(true);
             }
 
             // Wrap velocity between two transactions
@@ -240,15 +242,14 @@ public class KnockbackHandler extends Check implements PostPredictionCheck {
     }
 
     @Override
-    public void reload() {
-        super.reload();
-        offsetToFlag = getConfig().getDoubleElse("Knockback.threshold", 0.001);
-        maxAdv = getConfig().getDoubleElse("Knockback.max-advantage", 1);
-        immediate = getConfig().getDoubleElse("Knockback.immediate-setback-threshold", 0.1);
-        multiplier = getConfig().getDoubleElse("Knockback.setback-decay-multiplier", 0.999);
-        ceiling = getConfig().getDoubleElse("Knockback.max-ceiling", 4);
-
+    public void onReload(ConfigManager config) {
+        offsetToFlag = config.getDoubleElse("Knockback.threshold", 0.001);
+        maxAdv = config.getDoubleElse("Knockback.max-advantage", 1);
+        immediate = config.getDoubleElse("Knockback.immediate-setback-threshold", 0.1);
+        multiplier = config.getDoubleElse("Knockback.setback-decay-multiplier", 0.999);
+        ceiling = config.getDoubleElse("Knockback.max-ceiling", 4);
         if (maxAdv < 0) maxAdv = Double.MAX_VALUE;
         if (immediate < 0) immediate = Double.MAX_VALUE;
     }
+
 }

src/main/java/ac/grim/grimac/checks/type/BlockBreakCheck.java

@@ -0,0 +1,7 @@
+package ac.grim.grimac.checks.type;
+
+import ac.grim.grimac.utils.anticheat.update.BlockBreak;
+
+public interface BlockBreakCheck extends PostPredictionCheck {
+    default void onBlockBreak(final BlockBreak blockBreak) {}
+}

src/main/java/ac/grim/grimac/checks/type/BlockPlaceCheck.java

@@ -1,10 +1,12 @@
 package ac.grim.grimac.checks.type;
 
+import ac.grim.grimac.api.config.ConfigManager;
 import ac.grim.grimac.checks.Check;
 import ac.grim.grimac.player.GrimPlayer;
 import ac.grim.grimac.utils.anticheat.update.BlockPlace;
 import ac.grim.grimac.utils.collisions.HitboxData;
 import ac.grim.grimac.utils.collisions.datatypes.CollisionBox;
+import ac.grim.grimac.utils.collisions.datatypes.ComplexCollisionBox;
 import ac.grim.grimac.utils.collisions.datatypes.SimpleCollisionBox;
 import com.github.retrooper.packetevents.protocol.world.states.defaulttags.BlockTags;
 import com.github.retrooper.packetevents.protocol.world.states.type.StateType;
@@ -14,9 +16,10 @@ import com.github.retrooper.packetevents.util.Vector3i;
 import java.util.ArrayList;
 import java.util.List;
 
-public class BlockPlaceCheck extends Check implements RotationCheck {
+public class BlockPlaceCheck extends Check implements RotationCheck, PostPredictionCheck {
     private static final List<StateType> weirdBoxes = new ArrayList<>();
     private static final List<StateType> buggyBoxes = new ArrayList<>();
+    private final SimpleCollisionBox[] boxes = new SimpleCollisionBox[ComplexCollisionBox.DEFAULT_MAX_COLLISION_BOX_SIZE];
 
     protected int cancelVL;
 
@@ -33,9 +36,8 @@ public class BlockPlaceCheck extends Check implements RotationCheck {
     }
 
     @Override
-    public void reload() {
-        super.reload();
-        this.cancelVL = getConfig().getIntElse(getConfigName() + ".cancelVL", 5);
+    public void onReload(ConfigManager config) {
+        this.cancelVL = config.getIntElse(getConfigName() + ".cancelVL", 5);
     }
 
     protected boolean shouldCancel() {
@@ -69,11 +71,11 @@ public class BlockPlaceCheck extends Check implements RotationCheck {
         Vector3i clicked = place.getPlacedAgainstBlockLocation();
         CollisionBox placedOn = HitboxData.getBlockHitbox(player, place.getMaterial(), player.getClientVersion(), player.compensatedWorld.getWrappedBlockStateAt(clicked), clicked.getX(), clicked.getY(), clicked.getZ());
 
-        List<SimpleCollisionBox> boxes = new ArrayList<>();
-        placedOn.downCast(boxes);
+        int size = placedOn.downCast(boxes);
 
         SimpleCollisionBox combined = new SimpleCollisionBox(clicked.getX(), clicked.getY(), clicked.getZ());
-        for (SimpleCollisionBox box : boxes) {
+        for (int i = 0; i < size; i++) {
+            SimpleCollisionBox box = boxes[i];
             double minX = Math.max(box.minX, combined.minX);
             double minY = Math.max(box.minY, combined.minY);
             double minZ = Math.max(box.minZ, combined.minZ);

src/main/java/ac/grim/grimac/checks/type/PacketCheck.java

@@ -1,19 +1,10 @@
 package ac.grim.grimac.checks.type;
 
-
 import ac.grim.grimac.api.AbstractCheck;
-import ac.grim.grimac.utils.anticheat.update.PositionUpdate;
 import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.event.PacketSendEvent;
 
 public interface PacketCheck extends AbstractCheck {
-
-    default void onPacketReceive(final PacketReceiveEvent event) {
-    }
-
-    default void onPacketSend(final PacketSendEvent event) {
-    }
-
-    default void onPositionUpdate(final PositionUpdate positionUpdate) {
-    }
+    default void onPacketReceive(final PacketReceiveEvent event) {}
+    default void onPacketSend(final PacketSendEvent event) {}
 }

src/main/java/ac/grim/grimac/checks/type/RotationCheck.java

@@ -1,8 +1,6 @@
 package ac.grim.grimac.checks.type;
 
 import ac.grim.grimac.api.AbstractCheck;
-import ac.grim.grimac.checks.Check;
-import ac.grim.grimac.player.GrimPlayer;
 import ac.grim.grimac.utils.anticheat.update.RotationUpdate;
 
 public interface RotationCheck extends AbstractCheck {

src/main/java/ac/grim/grimac/checks/type/VehicleCheck.java

@@ -1,8 +1,6 @@
 package ac.grim.grimac.checks.type;
 
 import ac.grim.grimac.api.AbstractCheck;
-import ac.grim.grimac.checks.Check;
-import ac.grim.grimac.player.GrimPlayer;
 import ac.grim.grimac.utils.anticheat.update.VehiclePositionUpdate;
 
 public interface VehicleCheck extends AbstractCheck {

src/main/java/ac/grim/grimac/commands/GrimDebug.java

@@ -70,4 +70,4 @@ public class GrimDebug extends BaseCommand {
 
         sender.sendMessage("Console output for " + (grimPlayer.bukkitPlayer == null ? grimPlayer.user.getProfile().getName() : grimPlayer.bukkitPlayer.getName()) + " is now " + isOutput);
     }
-}
+}

src/main/java/ac/grim/grimac/commands/GrimProfile.java

@@ -1,12 +1,9 @@
 package ac.grim.grimac.commands;
 
 import ac.grim.grimac.GrimAPI;
-import ac.grim.grimac.checks.impl.aim.processor.AimProcessor;
-import ac.grim.grimac.checks.impl.misc.ClientBrand;
 import ac.grim.grimac.player.GrimPlayer;
 import ac.grim.grimac.utils.anticheat.MessageUtil;
 import ac.grim.grimac.utils.anticheat.MultiLibUtil;
-import ac.grim.grimac.utils.math.GrimMath;
 import co.aikar.commands.BaseCommand;
 import co.aikar.commands.annotation.CommandAlias;
 import co.aikar.commands.annotation.CommandCompletion;

src/main/java/ac/grim/grimac/commands/GrimReload.java

@@ -1,15 +1,11 @@
 package ac.grim.grimac.commands;
 
 import ac.grim.grimac.GrimAPI;
-import ac.grim.grimac.checks.Check;
-import ac.grim.grimac.player.GrimPlayer;
 import ac.grim.grimac.utils.anticheat.MessageUtil;
 import co.aikar.commands.BaseCommand;
 import co.aikar.commands.annotation.CommandAlias;
 import co.aikar.commands.annotation.CommandPermission;
 import co.aikar.commands.annotation.Subcommand;
-import com.github.retrooper.packetevents.netty.channel.ChannelHelper;
-import org.bukkit.ChatColor;
 import org.bukkit.command.CommandSender;
 
 @CommandAlias("grim|grimac")
@@ -18,14 +14,15 @@ public class GrimReload extends BaseCommand {
     @CommandPermission("grim.reload")
     public void onReload(CommandSender sender) {
         //reload config
-        try {
-            GrimAPI.INSTANCE.getExternalAPI().reload();
-        } catch (RuntimeException e) {
-            sender.sendMessage(ChatColor.RED + e.getMessage());
-            return;
-        }
-
-        sender.sendMessage(MessageUtil.format("%prefix% &fConfig has been reloaded."));
+        sender.sendMessage(MessageUtil.format("%prefix% &7Reloading config..."));
+        GrimAPI.INSTANCE.getExternalAPI().reloadAsync().exceptionally(throwable -> false)
+                .thenAccept(bool -> {
+                    if (bool) {
+                        sender.sendMessage(MessageUtil.format("%prefix% &fConfig has been reloaded."));
+                    } else {
+                        sender.sendMessage(MessageUtil.format("%prefix% &cFailed to reload config."));
+                    }
+                });
     }
 
 }

src/main/java/ac/grim/grimac/commands/GrimSendAlert.java

@@ -20,7 +20,7 @@ public class GrimSendAlert extends BaseCommand {
             bukkitPlayer.sendMessage(string);
         }
 
-        if (GrimAPI.INSTANCE.getConfigManager().getConfig().getBooleanElse("alerts.print-to-console", true)) {
+        if (GrimAPI.INSTANCE.getConfigManager().isPrintAlertsToConsole()) {
             LogUtil.console(string); // Print alert to console
         }
     }

src/main/java/ac/grim/grimac/commands/GrimSpectate.java

@@ -23,8 +23,7 @@ public class GrimSpectate extends BaseCommand {
     @CommandPermission("grim.spectate")
     @CommandCompletion("@players")
     public void onSpectate(CommandSender sender, @Optional OnlinePlayer target) {
-        if (!(sender instanceof Player)) return;
-        Player player = (Player) sender;
+        if (!(sender instanceof Player player)) return;
 
         if (target != null && target.getPlayer().getUniqueId().equals(player.getUniqueId())) {
             String message = GrimAPI.INSTANCE.getConfigManager().getConfig().getStringElse("cannot-run-on-self", "%prefix% &cYou cannot use this command on yourself!");

src/main/java/ac/grim/grimac/commands/GrimStopSpectating.java

@@ -3,6 +3,8 @@ package ac.grim.grimac.commands;
 import ac.grim.grimac.GrimAPI;
 import ac.grim.grimac.utils.anticheat.MessageUtil;
 import co.aikar.commands.BaseCommand;
+import co.aikar.commands.BukkitCommandCompletionContext;
+import co.aikar.commands.CommandCompletions.CommandCompletionHandler;
 import co.aikar.commands.annotation.CommandAlias;
 import co.aikar.commands.annotation.CommandCompletion;
 import co.aikar.commands.annotation.CommandPermission;
@@ -10,17 +12,20 @@ import co.aikar.commands.annotation.Subcommand;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
 
+import java.util.List;
+
 @CommandAlias("grim|grimac")
 public class GrimStopSpectating extends BaseCommand {
+    public static final CommandCompletionHandler<BukkitCommandCompletionContext> completionHandler = context -> context.getSender().hasPermission("grim.spectate.stophere") ? List.of("here") : List.of();
+
     @Subcommand("stopspectating")
     @CommandPermission("grim.spectate")
-    @CommandCompletion("here")
+    @CommandCompletion("@stopspectating")
     public void onStopSpectate(CommandSender sender, String[] args) {
+        if (!(sender instanceof Player player)) return;
         String string = args.length > 0 ? args[0] : null;
-        if (!(sender instanceof Player)) return;
-        Player player = (Player) sender;
         if (GrimAPI.INSTANCE.getSpectateManager().isSpectating(player.getUniqueId())) {
-            boolean teleportBack = string == null || !string.equalsIgnoreCase("here");
+            boolean teleportBack = string == null || !string.equalsIgnoreCase("here") || !sender.hasPermission("grim.spectate.stophere");
             GrimAPI.INSTANCE.getSpectateManager().disable(player, teleportBack);
         } else {
             String message = GrimAPI.INSTANCE.getConfigManager().getConfig().getStringElse("cannot-spectate-return", "%prefix% &cYou can only do this after spectating a player.");
@@ -28,4 +33,3 @@ public class GrimStopSpectating extends BaseCommand {
         }
     }
 }
-

src/main/java/ac/grim/grimac/events/packets/CheckManagerListener.java

@@ -1,13 +1,12 @@
 package ac.grim.grimac.events.packets;
 
 import ac.grim.grimac.GrimAPI;
-import ac.grim.grimac.checks.impl.badpackets.BadPacketsX;
-import ac.grim.grimac.checks.impl.badpackets.BadPacketsZ;
 import ac.grim.grimac.events.packets.patch.ResyncWorldUtil;
 import ac.grim.grimac.player.GrimPlayer;
 import ac.grim.grimac.utils.anticheat.update.*;
 import ac.grim.grimac.utils.blockplace.BlockPlaceResult;
 import ac.grim.grimac.utils.blockplace.ConsumesBlockPlace;
+import ac.grim.grimac.utils.change.BlockModification;
 import ac.grim.grimac.utils.collisions.HitboxData;
 import ac.grim.grimac.utils.collisions.datatypes.CollisionBox;
 import ac.grim.grimac.utils.collisions.datatypes.SimpleCollisionBox;
@@ -52,6 +51,7 @@ import org.bukkit.util.Vector;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.function.BiFunction;
+import java.util.function.Function;
 
 public class CheckManagerListener extends PacketListenerAbstract {
 
@@ -224,11 +224,10 @@ public class CheckManagerListener extends PacketListenerAbstract {
         }
     }
 
-    private static void handleBlockPlaceOrUseItem(PacketWrapper packet, GrimPlayer player) {
+    private static void handleBlockPlaceOrUseItem(PacketWrapper<?> packet, GrimPlayer player) {
         // Legacy "use item" packet
-        if (packet instanceof WrapperPlayClientPlayerBlockPlacement &&
+        if (packet instanceof WrapperPlayClientPlayerBlockPlacement place &&
                 PacketEvents.getAPI().getServerManager().getVersion().isOlderThan(ServerVersion.V_1_9)) {
-            WrapperPlayClientPlayerBlockPlacement place = (WrapperPlayClientPlayerBlockPlacement) packet;
 
             if (player.gamemode == GameMode.SPECTATOR || player.gamemode == GameMode.ADVENTURE) return;
 
@@ -243,9 +242,7 @@ public class CheckManagerListener extends PacketListenerAbstract {
             }
         }
 
-        if (packet instanceof WrapperPlayClientUseItem) {
-            WrapperPlayClientUseItem place = (WrapperPlayClientUseItem) packet;
-
+        if (packet instanceof WrapperPlayClientUseItem place) {
             if (player.gamemode == GameMode.SPECTATOR || player.gamemode == GameMode.ADVENTURE) return;
 
             ItemStack placedWith = player.getInventory().getHeldItem();
@@ -257,9 +254,7 @@ public class CheckManagerListener extends PacketListenerAbstract {
         }
 
         // Check for interactable first (door, etc)
-        if (packet instanceof WrapperPlayClientPlayerBlockPlacement) {
-            WrapperPlayClientPlayerBlockPlacement place = (WrapperPlayClientPlayerBlockPlacement) packet;
-
+        if (packet instanceof WrapperPlayClientPlayerBlockPlacement place) {
             ItemStack placedWith = player.getInventory().getHeldItem();
             ItemStack offhand = player.getInventory().getOffHand();
 
@@ -295,8 +290,7 @@ public class CheckManagerListener extends PacketListenerAbstract {
             }
         }
 
-        if (packet instanceof WrapperPlayClientPlayerBlockPlacement) {
-            WrapperPlayClientPlayerBlockPlacement place = (WrapperPlayClientPlayerBlockPlacement) packet;
+        if (packet instanceof WrapperPlayClientPlayerBlockPlacement place) {
             Vector3i blockPosition = place.getBlockPosition();
             BlockFace face = place.getFace();
 
@@ -348,7 +342,7 @@ public class CheckManagerListener extends PacketListenerAbstract {
             // Additionally, only yaw/pitch matters: https://github.com/GrimAnticheat/Grim/issues/1275#issuecomment-1872444018
             // 1.9+ isn't impacted by this packet as much.
             if (PacketEvents.getAPI().getServerManager().getVersion().isOlderThanOrEquals(ServerVersion.V_1_9)) {
-                if (GrimAPI.INSTANCE.getConfigManager().getConfig().getBooleanElse("cancel-duplicate-packet", true)) {
+                if (player.isCancelDuplicatePacket()) {
                     player.packetStateData.cancelDuplicatePacket = true;
                 }
             } else {
@@ -358,7 +352,7 @@ public class CheckManagerListener extends PacketListenerAbstract {
 
             player.packetStateData.lastPacketWasOnePointSeventeenDuplicate = true;
 
-            if (!GrimAPI.INSTANCE.getConfigManager().isIgnoreDuplicatePacketRotation()) {
+            if (!player.isIgnoreDuplicatePacketRotation()) {
                 if (player.xRot != location.getYaw() || player.yRot != location.getPitch()) {
                     player.lastXRot = player.xRot;
                     player.lastYRot = player.yRot;
@@ -375,6 +369,9 @@ public class CheckManagerListener extends PacketListenerAbstract {
         return false;
     }
 
+    // Manual filter on FINISH_DIGGING to prevent clients setting non-breakable blocks to air
+    private static final Function<StateType, Boolean> BREAKABLE = type -> !type.isAir() && type.getHardness() != -1.0f && type != StateTypes.WATER && type != StateTypes.LAVA;
+
     @Override
     public void onPacketReceive(PacketReceiveEvent event) {
         if (event.getConnectionState() != ConnectionState.PLAY) return;
@@ -428,7 +425,7 @@ public class CheckManagerListener extends PacketListenerAbstract {
         if (WrapperPlayClientPlayerFlying.isFlying(event.getPacketType())) {
             WrapperPlayClientPlayerFlying flying = new WrapperPlayClientPlayerFlying(event);
             Location pos = flying.getLocation();
-            boolean ignoreRotation = player.packetStateData.lastPacketWasOnePointSeventeenDuplicate && GrimAPI.INSTANCE.getConfigManager().isIgnoreDuplicatePacketRotation();
+            boolean ignoreRotation = player.packetStateData.lastPacketWasOnePointSeventeenDuplicate && player.isIgnoreDuplicatePacketRotation();
             handleFlying(player, pos.getX(), pos.getY(), pos.getZ(), ignoreRotation ? player.xRot : pos.getYaw(), ignoreRotation ? player.yRot : pos.getPitch(), flying.hasPositionChanged(), flying.hasRotationChanged(), flying.isOnGround(), teleportData, event);
         }
 
@@ -455,41 +452,52 @@ public class CheckManagerListener extends PacketListenerAbstract {
         }
 
         if (event.getPacketType() == PacketType.Play.Client.PLAYER_DIGGING) {
-            WrapperPlayClientPlayerDigging dig = new WrapperPlayClientPlayerDigging(event);
-            WrappedBlockState block = player.compensatedWorld.getWrappedBlockStateAt(dig.getBlockPosition());
+            final WrapperPlayClientPlayerDigging packet = new WrapperPlayClientPlayerDigging(event);
+            final DiggingAction action = packet.getAction();
 
-            player.checkManager.getPacketCheck(BadPacketsX.class).handle(event, dig, block.getType());
-            player.checkManager.getPacketCheck(BadPacketsZ.class).handle(event, dig);
+            if (action == DiggingAction.START_DIGGING || action == DiggingAction.FINISHED_DIGGING || action == DiggingAction.CANCELLED_DIGGING) {
+                final BlockBreak blockBreak = new BlockBreak(packet.getBlockPosition(), packet.getBlockFace(), action, player.compensatedWorld.getWrappedBlockStateAt(packet.getBlockPosition()));
 
-            if (dig.getAction() == DiggingAction.FINISHED_DIGGING) {
-                // Not unbreakable
-                if (!block.getType().isAir() && block.getType().getHardness() != -1.0f && !event.isCancelled()) {
-                    player.compensatedWorld.startPredicting();
-                    player.compensatedWorld.updateBlock(dig.getBlockPosition().getX(), dig.getBlockPosition().getY(), dig.getBlockPosition().getZ(), 0);
-                    player.compensatedWorld.stopPredicting(dig);
-                }
-            }
+                player.checkManager.onBlockBreak(blockBreak);
 
-            if (dig.getAction() == DiggingAction.START_DIGGING && !event.isCancelled()) {
-                double damage = BlockBreakSpeed.getBlockDamage(player, dig.getBlockPosition());
-
-                //Instant breaking, no damage means it is unbreakable by creative players (with swords)
-                if (damage >= 1) {
-                    player.compensatedWorld.startPredicting();
-                    if (player.getClientVersion().isNewerThanOrEquals(ClientVersion.V_1_13) && Materials.isWaterSource(player.getClientVersion(), block)) {
-                        // Vanilla uses a method to grab water flowing, but as you can't break flowing water
-                        // We can simply treat all waterlogged blocks or source blocks as source blocks
-                        player.compensatedWorld.updateBlock(dig.getBlockPosition(), StateTypes.WATER.createBlockState(CompensatedWorld.blockVersion));
-                    } else {
-                        player.compensatedWorld.updateBlock(dig.getBlockPosition().getX(), dig.getBlockPosition().getY(), dig.getBlockPosition().getZ(), 0);
+                if (blockBreak.isCancelled()) {
+                    event.setCancelled(true);
+                    player.onPacketCancel();
+                    ResyncWorldUtil.resyncPosition(player, blockBreak.position, packet.getSequence());
+                } else {
+                    if (action == DiggingAction.FINISHED_DIGGING && BREAKABLE.apply(blockBreak.block.getType())) {
+                        player.compensatedWorld.startPredicting();
+                        player.compensatedWorld.updateBlock(blockBreak.position.x, blockBreak.position.y, blockBreak.position.z, 0);
+                        player.compensatedWorld.stopPredicting(packet);
                     }
-                    player.compensatedWorld.stopPredicting(dig);
-                }
-            }
 
-            if (!event.isCancelled()) {
-                if (dig.getAction() == DiggingAction.START_DIGGING || dig.getAction() == DiggingAction.FINISHED_DIGGING || dig.getAction() == DiggingAction.CANCELLED_DIGGING) {
-                    player.compensatedWorld.handleBlockBreakPrediction(dig);
+                    if (action == DiggingAction.START_DIGGING) {
+                        double damage = BlockBreakSpeed.getBlockDamage(player, blockBreak.position);
+
+                        // Instant breaking, no damage means it is unbreakable by creative players (with swords)
+                        if (damage >= 1) {
+                            player.compensatedWorld.startPredicting();
+                            player.blockHistory.add(
+                                new BlockModification(
+                                    player.compensatedWorld.getWrappedBlockStateAt(blockBreak.position),
+                                    WrappedBlockState.getByGlobalId(0),
+                                    blockBreak.position,
+                                    GrimAPI.INSTANCE.getTickManager().currentTick,
+                                    BlockModification.Cause.START_DIGGING
+                                )
+                            );
+                            if (player.getClientVersion().isNewerThanOrEquals(ClientVersion.V_1_13) && Materials.isWaterSource(player.getClientVersion(), blockBreak.block)) {
+                                // Vanilla uses a method to grab water flowing, but as you can't break flowing water
+                                // We can simply treat all waterlogged blocks or source blocks as source blocks
+                                player.compensatedWorld.updateBlock(blockBreak.position, StateTypes.WATER.createBlockState(CompensatedWorld.blockVersion));
+                            } else {
+                                player.compensatedWorld.updateBlock(blockBreak.position.x, blockBreak.position.y, blockBreak.position.z, 0);
+                            }
+                            player.compensatedWorld.stopPredicting(packet);
+                        }
+                    }
+
+                    player.compensatedWorld.handleBlockBreakPrediction(packet);
                 }
             }
         }
@@ -576,6 +584,15 @@ public class CheckManagerListener extends PacketListenerAbstract {
             player.packetStateData.cancelDuplicatePacket = false;
         }
 
+        if (event.getPacketType() == PacketType.Play.Client.CLIENT_TICK_END) {
+            if (!player.packetStateData.didSendMovementBeforeTickEnd) {
+                // The player didn't send a movement packet, so we can predict this like we had idle tick on 1.8
+                player.packetStateData.didLastLastMovementIncludePosition = player.packetStateData.didLastMovementIncludePosition;
+                player.packetStateData.didLastMovementIncludePosition = false;
+            }
+            player.packetStateData.didSendMovementBeforeTickEnd = false;
+        }
+
         // Finally, remove the packet state variables on this packet
         player.packetStateData.lastPacketWasOnePointSeventeenDuplicate = false;
         player.packetStateData.lastPacketWasTeleport = false;
@@ -745,6 +762,10 @@ public class CheckManagerListener extends PacketListenerAbstract {
 
         player.packetStateData.didLastLastMovementIncludePosition = player.packetStateData.didLastMovementIncludePosition;
         player.packetStateData.didLastMovementIncludePosition = hasPosition;
+
+        if (!player.packetStateData.lastPacketWasTeleport) {
+            player.packetStateData.didSendMovementBeforeTickEnd = true;
+        }
     }
 
     private static void placeLilypad(GrimPlayer player, InteractionHand hand) {
@@ -782,7 +803,7 @@ public class CheckManagerListener extends PacketListenerAbstract {
         Vector3d startingPos = new Vector3d(player.x, player.y + player.getEyeHeight(), player.z);
         Vector startingVec = new Vector(startingPos.getX(), startingPos.getY(), startingPos.getZ());
         Ray trace = new Ray(player, startingPos.getX(), startingPos.getY(), startingPos.getZ(), player.xRot, player.yRot);
-        final double distance = player.compensatedEntities.getSelf().getAttributeValue(Attributes.PLAYER_BLOCK_INTERACTION_RANGE);
+        final double distance = player.compensatedEntities.getSelf().getAttributeValue(Attributes.BLOCK_INTERACTION_RANGE);
         Vector endVec = trace.getPointAtDistance(distance);
         Vector3d endPos = new Vector3d(endVec.getX(), endVec.getY(), endVec.getZ());
 
@@ -797,14 +818,14 @@ public class CheckManagerListener extends PacketListenerAbstract {
 
             for (SimpleCollisionBox box : boxes) {
                 Pair<Vector, BlockFace> intercept = ReachUtils.calculateIntercept(box, trace.getOrigin(), trace.getPointAtDistance(distance));
-                if (intercept.getFirst() == null) continue; // No intercept
+                if (intercept.first() == null) continue; // No intercept
 
-                Vector hitLoc = intercept.getFirst();
+                Vector hitLoc = intercept.first();
 
                 if (hitLoc.distanceSquared(startingVec) < bestHitResult) {
                     bestHitResult = hitLoc.distanceSquared(startingVec);
                     bestHitLoc = hitLoc;
-                    bestFace = intercept.getSecond();
+                    bestFace = intercept.second();
                 }
             }
             if (bestHitLoc != null) {
@@ -819,8 +840,8 @@ public class CheckManagerListener extends PacketListenerAbstract {
 
                 Pair<Vector, BlockFace> intercept = ReachUtils.calculateIntercept(box, trace.getOrigin(), trace.getPointAtDistance(distance));
 
-                if (intercept.getFirst() != null) {
-                    return new HitData(vector3i, intercept.getFirst(), intercept.getSecond(), block);
+                if (intercept.first() != null) {
+                    return new HitData(vector3i, intercept.first(), intercept.second(), block);
                 }
             }
 

src/main/java/ac/grim/grimac/events/packets/PacketEntityAction.java

@@ -1,9 +1,6 @@
 package ac.grim.grimac.events.packets;
 
 import ac.grim.grimac.GrimAPI;
-import ac.grim.grimac.checks.impl.movement.NoSlowC;
-import ac.grim.grimac.checks.impl.movement.NoSlowD;
-import ac.grim.grimac.checks.impl.movement.NoSlowE;
 import ac.grim.grimac.player.GrimPlayer;
 import com.github.retrooper.packetevents.event.PacketListenerAbstract;
 import com.github.retrooper.packetevents.event.PacketListenerPriority;

src/main/java/ac/grim/grimac/events/packets/PacketEntityReplication.java

@@ -1,6 +1,6 @@
 package ac.grim.grimac.events.packets;
 
-import ac.grim.grimac.GrimAPI;
+import ac.grim.grimac.api.config.ConfigManager;
 import ac.grim.grimac.checks.Check;
 import ac.grim.grimac.checks.type.PacketCheck;
 import ac.grim.grimac.player.GrimPlayer;
@@ -13,6 +13,7 @@ import com.github.retrooper.packetevents.PacketEvents;
 import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.event.PacketSendEvent;
 import com.github.retrooper.packetevents.manager.server.ServerVersion;
+import com.github.retrooper.packetevents.protocol.entity.EntityPositionData;
 import com.github.retrooper.packetevents.protocol.entity.data.EntityData;
 import com.github.retrooper.packetevents.protocol.entity.type.EntityType;
 import com.github.retrooper.packetevents.protocol.entity.type.EntityTypes;
@@ -21,7 +22,6 @@ import com.github.retrooper.packetevents.protocol.player.ClientVersion;
 import com.github.retrooper.packetevents.protocol.player.UserProfile;
 import com.github.retrooper.packetevents.protocol.potion.PotionType;
 import com.github.retrooper.packetevents.util.Vector3d;
-import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerFlying;
 import com.github.retrooper.packetevents.wrapper.play.server.*;
 import io.github.retrooper.packetevents.util.viaversion.ViaVersionUtil;
 
@@ -53,7 +53,6 @@ public class PacketEntityReplication extends Check implements PacketCheck {
     private final List<Integer> despawnedEntitiesThisTransaction = new ArrayList<>();
 
     // Maximum ping when a firework boost is removed from the player.
-    private final int maxFireworkBoostPing = GrimAPI.INSTANCE.getConfigManager().getConfig().getIntElse("max-ping-firework-boost", 1000);
 
     public PacketEntityReplication(GrimPlayer player) {
         super(player);
@@ -61,22 +60,19 @@ public class PacketEntityReplication extends Check implements PacketCheck {
 
     @Override
     public void onPacketReceive(PacketReceiveEvent event) {
-        if (WrapperPlayClientPlayerFlying.isFlying(event.getPacketType())) {
-            // Teleports don't interpolate, duplicate 1.17 packets don't interpolate
-            if (player.packetStateData.lastPacketWasTeleport || player.packetStateData.lastPacketWasOnePointSeventeenDuplicate)
-                return;
+        // Teleports don't interpolate, duplicate 1.17 packets don't interpolate
+        if (!isTickPacket(event.getPacketType())) return;
 
-            boolean isTickingReliably = player.isTickingReliablyFor(3);
+        boolean isTickingReliably = player.isTickingReliablyFor(3);
 
-            PacketEntity playerVehicle = player.compensatedEntities.getSelf().getRiding();
-            for (PacketEntity entity : player.compensatedEntities.entityMap.values()) {
-                if (entity == playerVehicle && !player.vehicleData.lastDummy) {
-                    // The player has this as their vehicle, so they aren't interpolating it.
-                    // And it isn't a dummy position
-                    entity.setPositionRaw(entity.getPossibleCollisionBoxes());
-                } else {
-                    entity.onMovement(isTickingReliably);
-                }
+        PacketEntity playerVehicle = player.compensatedEntities.getSelf().getRiding();
+        for (PacketEntity entity : player.compensatedEntities.entityMap.values()) {
+            if (entity == playerVehicle && !player.vehicleData.lastDummy) {
+                // The player has this as their vehicle, so they aren't interpolating it.
+                // And it isn't a dummy position
+                entity.setPositionRaw(entity.getPossibleCollisionBoxes());
+            } else {
+                entity.onMovement(isTickingReliably);
             }
         }
     }
@@ -87,44 +83,55 @@ public class PacketEntityReplication extends Check implements PacketCheck {
         if ((event.getPacketType() == PacketType.Play.Server.PING || event.getPacketType() == PacketType.Play.Server.WINDOW_CONFIRMATION) && player.packetStateData.lastServerTransWasValid) {
             despawnedEntitiesThisTransaction.clear();
         }
-        if (event.getPacketType() == PacketType.Play.Server.SPAWN_LIVING_ENTITY) {
+        else if (event.getPacketType() == PacketType.Play.Server.SPAWN_LIVING_ENTITY) {
             WrapperPlayServerSpawnLivingEntity packetOutEntity = new WrapperPlayServerSpawnLivingEntity(event);
             addEntity(packetOutEntity.getEntityId(), packetOutEntity.getEntityUUID(), packetOutEntity.getEntityType(), packetOutEntity.getPosition(), packetOutEntity.getYaw(), packetOutEntity.getPitch(), packetOutEntity.getEntityMetadata(), 0);
         }
-        if (event.getPacketType() == PacketType.Play.Server.SPAWN_ENTITY) {
+        else if (event.getPacketType() == PacketType.Play.Server.SPAWN_ENTITY) {
             WrapperPlayServerSpawnEntity packetOutEntity = new WrapperPlayServerSpawnEntity(event);
             addEntity(packetOutEntity.getEntityId(), packetOutEntity.getUUID().orElse(null), packetOutEntity.getEntityType(), packetOutEntity.getPosition(), packetOutEntity.getYaw(), packetOutEntity.getPitch(), null, packetOutEntity.getData());
         }
-        if (event.getPacketType() == PacketType.Play.Server.SPAWN_PLAYER) {
+        else if (event.getPacketType() == PacketType.Play.Server.SPAWN_PLAYER) {
             WrapperPlayServerSpawnPlayer packetOutEntity = new WrapperPlayServerSpawnPlayer(event);
             addEntity(packetOutEntity.getEntityId(), packetOutEntity.getUUID(), EntityTypes.PLAYER, packetOutEntity.getPosition(), packetOutEntity.getYaw(), packetOutEntity.getPitch(), packetOutEntity.getEntityMetadata(), 0);
         }
-
-        if (event.getPacketType() == PacketType.Play.Server.ENTITY_RELATIVE_MOVE) {
+        else if (event.getPacketType() == PacketType.Play.Server.SPAWN_PAINTING) {
+            WrapperPlayServerSpawnPainting packetOutEntity = new WrapperPlayServerSpawnPainting(event);
+            addEntity(packetOutEntity.getEntityId(), packetOutEntity.getUUID(), EntityTypes.PAINTING, packetOutEntity.getPosition().toVector3d(), 0, 0f, null, packetOutEntity.getDirection().getHorizontalIndex());
+        }
+        else if (event.getPacketType() == PacketType.Play.Server.ENTITY_RELATIVE_MOVE) {
             WrapperPlayServerEntityRelativeMove move = new WrapperPlayServerEntityRelativeMove(event);
             handleMoveEntity(event, move.getEntityId(), move.getDeltaX(), move.getDeltaY(), move.getDeltaZ(), null, null, true, true);
         }
-        if (event.getPacketType() == PacketType.Play.Server.ENTITY_RELATIVE_MOVE_AND_ROTATION) {
+        else if (event.getPacketType() == PacketType.Play.Server.ENTITY_RELATIVE_MOVE_AND_ROTATION) {
             WrapperPlayServerEntityRelativeMoveAndRotation move = new WrapperPlayServerEntityRelativeMoveAndRotation(event);
             handleMoveEntity(event, move.getEntityId(), move.getDeltaX(), move.getDeltaY(), move.getDeltaZ(), move.getYaw() * 0.7111111F, move.getPitch() * 0.7111111F, true, true);
         }
-        if (event.getPacketType() == PacketType.Play.Server.ENTITY_TELEPORT) {
+        else if (event.getPacketType() == PacketType.Play.Server.ENTITY_TELEPORT) {
             WrapperPlayServerEntityTeleport move = new WrapperPlayServerEntityTeleport(event);
             Vector3d pos = move.getPosition();
             handleMoveEntity(event, move.getEntityId(), pos.getX(), pos.getY(), pos.getZ(), move.getYaw(), move.getPitch(), false, true);
         }
-        if (event.getPacketType() == PacketType.Play.Server.ENTITY_ROTATION) { // Affects interpolation
+        else if (event.getPacketType() == PacketType.Play.Server.ENTITY_POSITION_SYNC) {
+            // ENTITY_TELEPORT but without relative flags
+            WrapperPlayServerEntityPositionSync move = new WrapperPlayServerEntityPositionSync(event);
+            final EntityPositionData values = move.getValues();
+            final Vector3d pos = values.getPosition();
+            // TODO this isn't technically correct
+            // If the position sync is to a pos > 4096 from the entity pos, client does some special stuff without interpolation
+            handleMoveEntity(event, move.getId(), pos.getX(), pos.getY(), pos.getZ(), values.getYaw(), values.getPitch(), false, true);
+        }
+        else if (event.getPacketType() == PacketType.Play.Server.ENTITY_ROTATION) { // Affects interpolation
             WrapperPlayServerEntityRotation move = new WrapperPlayServerEntityRotation(event);
             handleMoveEntity(event, move.getEntityId(), 0, 0, 0, move.getYaw() * 0.7111111F, move.getPitch() * 0.7111111F, true, false);
         }
-
-        if (event.getPacketType() == PacketType.Play.Server.ENTITY_METADATA) {
+        else if (event.getPacketType() == PacketType.Play.Server.ENTITY_METADATA) {
             WrapperPlayServerEntityMetadata entityMetadata = new WrapperPlayServerEntityMetadata(event);
             player.latencyUtils.addRealTimeTask(player.lastTransactionSent.get(), () -> player.compensatedEntities.updateEntityMetadata(entityMetadata.getEntityId(), entityMetadata.getEntityMetadata()));
         }
 
         // 1.19.3+
-        if (event.getPacketType() == PacketType.Play.Server.PLAYER_INFO_UPDATE) {
+        else if (event.getPacketType() == PacketType.Play.Server.PLAYER_INFO_UPDATE) {
             WrapperPlayServerPlayerInfoUpdate info = new WrapperPlayServerPlayerInfoUpdate(event);
             player.latencyUtils.addRealTimeTask(player.lastTransactionSent.get(), () -> {
                 for (WrapperPlayServerPlayerInfoUpdate.PlayerInfo entry : info.getEntries()) {
@@ -151,7 +158,7 @@ public class PacketEntityReplication extends Check implements PacketCheck {
             });
         }
 
-        if (event.getPacketType() == PacketType.Play.Server.ENTITY_EFFECT) {
+        else if (event.getPacketType() == PacketType.Play.Server.ENTITY_EFFECT) {
             WrapperPlayServerEntityEffect effect = new WrapperPlayServerEntityEffect(event);
 
             PotionType type = effect.getPotionType();
@@ -183,7 +190,7 @@ public class PacketEntityReplication extends Check implements PacketCheck {
             });
         }
 
-        if (event.getPacketType() == PacketType.Play.Server.REMOVE_ENTITY_EFFECT) {
+        else if (event.getPacketType() == PacketType.Play.Server.REMOVE_ENTITY_EFFECT) {
             WrapperPlayServerRemoveEntityEffect effect = new WrapperPlayServerRemoveEntityEffect(event);
 
             if (isDirectlyAffectingPlayer(player, effect.getEntityId())) player.sendTransaction();
@@ -196,7 +203,7 @@ public class PacketEntityReplication extends Check implements PacketCheck {
             });
         }
 
-        if (event.getPacketType() == PacketType.Play.Server.UPDATE_ATTRIBUTES) {
+        else if (event.getPacketType() == PacketType.Play.Server.UPDATE_ATTRIBUTES) {
             WrapperPlayServerUpdateAttributes attributes = new WrapperPlayServerUpdateAttributes(event);
 
             int entityID = attributes.getEntityId();
@@ -208,7 +215,7 @@ public class PacketEntityReplication extends Check implements PacketCheck {
                     () -> player.compensatedEntities.updateAttributes(entityID, attributes.getProperties()));
         }
 
-        if (event.getPacketType() == PacketType.Play.Server.ENTITY_STATUS) {
+        else if (event.getPacketType() == PacketType.Play.Server.ENTITY_STATUS) {
             WrapperPlayServerEntityStatus status = new WrapperPlayServerEntityStatus(event);
             // This hasn't changed from 1.7.2 to 1.17
             // Needed to exempt players on dead vehicles, as dead entities have strange physics.
@@ -228,9 +235,8 @@ public class PacketEntityReplication extends Check implements PacketCheck {
 
             if (status.getStatus() == 31) {
                 PacketEntity hook = player.compensatedEntities.getEntity(status.getEntityId());
-                if (!(hook instanceof PacketEntityHook)) return;
+                if (!(hook instanceof PacketEntityHook hookEntity)) return;
 
-                PacketEntityHook hookEntity = (PacketEntityHook) hook;
                 if (hookEntity.attached == player.entityID) {
                     player.sendTransaction();
                     // We don't transaction sandwich this, it's too rare to be a real problem.
@@ -243,7 +249,7 @@ public class PacketEntityReplication extends Check implements PacketCheck {
             }
         }
 
-        if (event.getPacketType() == PacketType.Play.Server.SET_SLOT) {
+        else if (event.getPacketType() == PacketType.Play.Server.SET_SLOT) {
             WrapperPlayServerSetSlot slot = new WrapperPlayServerSetSlot(event);
 
             if (slot.getWindowId() == 0) {
@@ -261,7 +267,7 @@ public class PacketEntityReplication extends Check implements PacketCheck {
             }
         }
 
-        if (event.getPacketType() == PacketType.Play.Server.WINDOW_ITEMS) {
+        else if (event.getPacketType() == PacketType.Play.Server.WINDOW_ITEMS) {
             WrapperPlayServerWindowItems items = new WrapperPlayServerWindowItems(event);
 
             if (items.getWindowId() == 0) { // Player inventory
@@ -271,16 +277,16 @@ public class PacketEntityReplication extends Check implements PacketCheck {
         }
 
         // 1.8 clients fail to send the RELEASE_USE_ITEM packet when a window is opened client sided while using an item
-        if (event.getPacketType() == PacketType.Play.Server.OPEN_WINDOW) {
+        else if (event.getPacketType() == PacketType.Play.Server.OPEN_WINDOW) {
             player.latencyUtils.addRealTimeTask(player.lastTransactionSent.get(), () -> player.packetStateData.setSlowedByUsingItem(false));
             player.latencyUtils.addRealTimeTask(player.lastTransactionSent.get() + 1, () -> player.packetStateData.setSlowedByUsingItem(false));
         }
-        if (event.getPacketType() == PacketType.Play.Server.OPEN_HORSE_WINDOW) {
+        else if (event.getPacketType() == PacketType.Play.Server.OPEN_HORSE_WINDOW) {
             player.latencyUtils.addRealTimeTask(player.lastTransactionSent.get(), () -> player.packetStateData.setSlowedByUsingItem(false));
             player.latencyUtils.addRealTimeTask(player.lastTransactionSent.get() + 1, () -> player.packetStateData.setSlowedByUsingItem(false));
         }
 
-        if (event.getPacketType() == PacketType.Play.Server.SET_PASSENGERS) {
+        else if (event.getPacketType() == PacketType.Play.Server.SET_PASSENGERS) {
             WrapperPlayServerSetPassengers mount = new WrapperPlayServerSetPassengers(event);
 
             int vehicleID = mount.getEntityId();
@@ -289,7 +295,7 @@ public class PacketEntityReplication extends Check implements PacketCheck {
             handleMountVehicle(event, vehicleID, passengers);
         }
 
-        if (event.getPacketType() == PacketType.Play.Server.ATTACH_ENTITY) {
+        else if (event.getPacketType() == PacketType.Play.Server.ATTACH_ENTITY) {
             WrapperPlayServerAttachEntity attach = new WrapperPlayServerAttachEntity(event);
 
             // This packet was replaced by the mount packet on 1.9+ servers - to support multiple passengers on one vehicle
@@ -320,7 +326,7 @@ public class PacketEntityReplication extends Check implements PacketCheck {
             }
         }
 
-        if (event.getPacketType() == PacketType.Play.Server.DESTROY_ENTITIES) {
+        else if (event.getPacketType() == PacketType.Play.Server.DESTROY_ENTITIES) {
             WrapperPlayServerDestroyEntities destroy = new WrapperPlayServerDestroyEntities(event);
 
             int[] destroyEntityIds = destroy.getEntityIds();
@@ -415,9 +421,13 @@ public class PacketEntityReplication extends Check implements PacketCheck {
                 // As we don't want vehicles to fly, we need to replace it with a teleport if it is player vehicle
                 //
                 // Don't bother with client controlled vehicles though
-                boolean vanillaVehicleFlight = player.compensatedEntities.serverPlayerVehicle != null && player.compensatedEntities.serverPlayerVehicle == entityId
-                        && player.getClientVersion().isNewerThanOrEquals(ClientVersion.V_1_9) &&
-                        PacketEvents.getAPI().getServerManager().getVersion().isNewerThanOrEquals(ServerVersion.V_1_9);
+                boolean vanillaVehicleFlight = player.compensatedEntities.serverPlayerVehicle != null
+                        && player.compensatedEntities.serverPlayerVehicle == entityId
+                        && player.getClientVersion().isNewerThanOrEquals(ClientVersion.V_1_9)
+                        // TODO: https://discord.com/channels/721686193061888071/721686193515003966/1310659538831020123
+                        // Why does the server now send an entity rel move packet matching the player's vehicle movement every time?
+                        && PacketEvents.getAPI().getServerManager().getVersion().isOlderThan(ServerVersion.V_1_21_2)
+                        && PacketEvents.getAPI().getServerManager().getVersion().isNewerThanOrEquals(ServerVersion.V_1_9);
 
                 // ViaVersion sends two relative packets when moving more than 4 blocks
                 // This is broken and causes the client to interpolate like (0, 4) and (1, 3) instead of (1, 7)
@@ -455,8 +465,7 @@ public class PacketEntityReplication extends Check implements PacketCheck {
         player.latencyUtils.addRealTimeTask(lastTrans, () -> {
             PacketEntity entity = player.compensatedEntities.getEntity(entityId);
             if (entity == null) return;
-            if (entity instanceof PacketEntityTrackXRot && yaw != null) {
-                PacketEntityTrackXRot xRotEntity = (PacketEntityTrackXRot) entity;
+            if (entity instanceof PacketEntityTrackXRot xRotEntity && yaw != null) {
                 xRotEntity.packetYaw = yaw;
                 xRotEntity.steps = entity.isBoat() ? 10 : 3;
             }
@@ -500,4 +509,12 @@ public class PacketEntityReplication extends Check implements PacketCheck {
     public void tickStartTick() {
         hasSentPreWavePacket = false;
     }
+
+    private int maxFireworkBoostPing = 1000;
+
+    @Override
+    public void onReload(ConfigManager config) {
+        maxFireworkBoostPing = config.getIntElse("max-ping-firework-boost", 1000);
+    }
+
 }

src/main/java/ac/grim/grimac/events/packets/PacketHidePlayerInfo.java

@@ -5,14 +5,11 @@ import ac.grim.grimac.player.GrimPlayer;
 import com.github.retrooper.packetevents.PacketEvents;
 import com.github.retrooper.packetevents.event.PacketListenerAbstract;
 import com.github.retrooper.packetevents.event.PacketListenerPriority;
-import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.event.PacketSendEvent;
 import com.github.retrooper.packetevents.manager.server.ServerVersion;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
-import com.github.retrooper.packetevents.protocol.packettype.PacketTypeCommon;
 import com.github.retrooper.packetevents.protocol.player.GameMode;
-import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerFlying;
-import com.github.retrooper.packetevents.wrapper.play.server.WrapperPlayServerEntityMetadata;
+import com.github.retrooper.packetevents.protocol.player.UserProfile;
 import com.github.retrooper.packetevents.wrapper.play.server.WrapperPlayServerPlayerInfo;
 import com.github.retrooper.packetevents.wrapper.play.server.WrapperPlayServerPlayerInfoUpdate;
 
@@ -20,22 +17,15 @@ import java.util.ArrayList;
 import java.util.EnumSet;
 import java.util.List;
 
-public class PacketSetWrapperNull extends PacketListenerAbstract {
-    // It's faster (and less buggy) to simply not re-encode the wrapper unless we changed something
-    // The two packets we change are clientbound entity metadata (to fix a netcode issue)
-    // and the serverbound player flying packets (to patch NoFall)
-    public PacketSetWrapperNull() {
+public class PacketHidePlayerInfo extends PacketListenerAbstract {
+
+    public PacketHidePlayerInfo() {
         super(PacketListenerPriority.HIGHEST);
     }
 
     @Override
     public void onPacketSend(PacketSendEvent event) {
-        if (event.getPacketType() == PacketType.Play.Server.ENTITY_METADATA) {
-            WrapperPlayServerEntityMetadata wrapper = new WrapperPlayServerEntityMetadata(event);
-            if (wrapper.getEntityId() != event.getUser().getEntityId()) {
-                event.setLastUsedWrapper(null);
-            }
-        } else if (event.getPacketType() == PacketType.Play.Server.PLAYER_INFO) {
+        if (event.getPacketType() == PacketType.Play.Server.PLAYER_INFO) {
             //iterate through players and fake their game mode if they are spectating via grim spectate
             if (PacketEvents.getAPI().getServerManager().getVersion().isOlderThanOrEquals(ServerVersion.V_1_12_2))
                 return;
@@ -62,8 +52,8 @@ public class PacketSetWrapperNull extends PacketListenerAbstract {
                 //if amount of hidden players is the amount of players updated & is an update game mode action just cancel it
                 if (hideCount == nmsPlayerInfoDataList.size() && info.getAction() == WrapperPlayServerPlayerInfo.Action.UPDATE_GAME_MODE) {
                     event.setCancelled(true);
-                } else if (hideCount <= 0) {
-                    event.setLastUsedWrapper(null);
+                } else if (hideCount > 0) {
+                    event.markForReEncode(true);
                 }
             }
         } else if (event.getPacketType() == PacketType.Play.Server.PLAYER_INFO_UPDATE) {
@@ -81,12 +71,13 @@ public class PacketSetWrapperNull extends PacketListenerAbstract {
                 for (WrapperPlayServerPlayerInfoUpdate.PlayerInfo entry : wrapper.getEntries()) {
                     //check if the player should be hidden
                     WrapperPlayServerPlayerInfoUpdate.PlayerInfo modifiedPacket = null;
-                    if (GrimAPI.INSTANCE.getSpectateManager().shouldHidePlayer(receiver, entry.getProfileId())) {
+                    final UserProfile gameProfile = entry.getGameProfile();
+                    if (GrimAPI.INSTANCE.getSpectateManager().shouldHidePlayer(receiver, gameProfile.getUUID())) {
                         hideCount++;
                         //modify & create a new packet from pre-existing one if they are a spectator
                         if (entry.getGameMode() == GameMode.SPECTATOR) {
                             modifiedPacket = new WrapperPlayServerPlayerInfoUpdate.PlayerInfo(
-                                    entry.getGameProfile(),
+                                    gameProfile,
                                     entry.isListed(),
                                     entry.getLatency(),
                                     GameMode.SURVIVAL,
@@ -104,30 +95,20 @@ public class PacketSetWrapperNull extends PacketListenerAbstract {
                     } //if only the game mode was updated and the packet was modified, don't send anything
 
                 }
-                //if no hidden players, don't modify packet
-                if (hideCount <= 0) {
-                    event.setLastUsedWrapper(null);
-                } else if (hideCount == modified.size()) { //if the amount of hidden players & modified entries are the same
+
+                // if the amount of hidden players & modified entries are the same
+                if (hideCount == modified.size()) {
                     if (onlyGameMode) { // if only the game mode changed, cancel
                         event.setCancelled(true);
                     } else { //if more than the game mode changed, remove the action
                         wrapper.getActions().remove(WrapperPlayServerPlayerInfoUpdate.Action.UPDATE_GAME_MODE);
+                        event.markForReEncode(true);
                     }
                 } else { //modify entries
                     wrapper.setEntries(modified);
+                    event.markForReEncode(true);
                 }
             }
-
-        } else if (event.getPacketType() != PacketType.Play.Server.PLAYER_POSITION_AND_LOOK) {
-            event.setLastUsedWrapper(null);
-        }
-    }
-
-    @Override
-    public void onPacketReceive(PacketReceiveEvent event) {
-        PacketTypeCommon packetType = event.getPacketType();
-        if (!WrapperPlayClientPlayerFlying.isFlying(packetType) && packetType != PacketType.Play.Client.CLIENT_SETTINGS && !event.isCancelled()) {
-            event.setLastUsedWrapper(null);
         }
     }
 }

src/main/java/ac/grim/grimac/events/packets/PacketPlayerAbilities.java

@@ -1,6 +1,6 @@
 package ac.grim.grimac.events.packets;
 
-import ac.grim.grimac.GrimAPI;
+import ac.grim.grimac.api.config.ConfigManager;
 import ac.grim.grimac.checks.Check;
 import ac.grim.grimac.checks.type.PacketCheck;
 import ac.grim.grimac.player.GrimPlayer;
@@ -37,7 +37,6 @@ public class PacketPlayerAbilities extends Check implements PacketCheck {
 
             if (lastSentPlayerCanFly && !abilities.isFlightAllowed()) {
                 int noFlying = player.lastTransactionSent.get();
-                int maxFlyingPing = GrimAPI.INSTANCE.getConfigManager().getConfig().getIntElse("max-ping-out-of-flying", 1000);
                 if (maxFlyingPing != -1) {
                     player.runNettyTaskInMs(() -> {
                         if (player.lastTransactionReceived.get() < noFlying) {
@@ -56,4 +55,12 @@ public class PacketPlayerAbilities extends Check implements PacketCheck {
 
         }
     }
+
+    int maxFlyingPing = 1000;
+
+    @Override
+    public void onReload(ConfigManager config) {
+        maxFlyingPing = config.getIntElse("max-ping-out-of-flying", 1000);
+    }
+
 }

src/main/java/ac/grim/grimac/events/packets/PacketPlayerAttack.java

@@ -8,6 +8,8 @@ import com.github.retrooper.packetevents.PacketEvents;
 import com.github.retrooper.packetevents.event.PacketListenerAbstract;
 import com.github.retrooper.packetevents.event.PacketListenerPriority;
 import com.github.retrooper.packetevents.event.PacketReceiveEvent;
+import com.github.retrooper.packetevents.manager.server.ServerVersion;
+import com.github.retrooper.packetevents.protocol.attribute.Attributes;
 import com.github.retrooper.packetevents.protocol.entity.type.EntityTypes;
 import com.github.retrooper.packetevents.protocol.item.ItemStack;
 import com.github.retrooper.packetevents.protocol.item.enchantment.type.EnchantmentTypes;
@@ -72,6 +74,13 @@ public class PacketPlayerAttack extends PacketListenerAbstract {
                             player.maxPlayerAttackSlow = 1;
                         }
                     } else if (!isLegacyPlayer && player.isSprinting) {
+                        // 1.9+ players who have attack speed cannot slow themselves twice in one tick because their attack cooldown gets reset on swing.
+                        if (player.maxPlayerAttackSlow > 0
+                                && PacketEvents.getAPI().getServerManager().getVersion().isNewerThanOrEquals(ServerVersion.V_1_9)
+                                && player.compensatedEntities.getSelf().getAttributeValue(Attributes.ATTACK_SPEED) < 16) { // 16 is a reasonable limit
+                            return;
+                        }
+
                         // 1.9+ player who might have been slowed, but we can't be sure
                         player.maxPlayerAttackSlow += 1;
                     }

src/main/java/ac/grim/grimac/events/packets/PacketPlayerDigging.java

@@ -2,7 +2,6 @@ package ac.grim.grimac.events.packets;
 
 import ac.grim.grimac.GrimAPI;
 import ac.grim.grimac.checks.impl.movement.NoSlowA;
-import ac.grim.grimac.checks.impl.movement.NoSlowD;
 import ac.grim.grimac.player.GrimPlayer;
 import com.github.retrooper.packetevents.PacketEvents;
 import com.github.retrooper.packetevents.event.PacketListenerAbstract;
@@ -23,7 +22,6 @@ import com.github.retrooper.packetevents.protocol.player.GameMode;
 import com.github.retrooper.packetevents.protocol.player.InteractionHand;
 import com.github.retrooper.packetevents.protocol.world.BlockFace;
 import com.github.retrooper.packetevents.wrapper.play.client.*;
-import org.bukkit.Bukkit;
 
 public class PacketPlayerDigging extends PacketListenerAbstract {
 
@@ -170,12 +168,14 @@ public class PacketPlayerDigging extends PacketListenerAbstract {
             }
         }
 
-        if (WrapperPlayClientPlayerFlying.isFlying(event.getPacketType())) {
+        if (WrapperPlayClientPlayerFlying.isFlying(event.getPacketType()) || event.getPacketType() == PacketType.Play.Client.CLIENT_TICK_END) {
             final GrimPlayer player = GrimAPI.INSTANCE.getPlayerDataManager().getPlayer(event.getUser());
-            if (player == null) return;
-
-            if (!player.packetStateData.lastPacketWasTeleport && !player.packetStateData.lastPacketWasOnePointSeventeenDuplicate) {
-                if (player.packetStateData.isSlowedByUsingItem() && player.packetStateData.getSlowedByUsingItemSlot() != player.packetStateData.lastSlotSelected) {
+            if (player != null && player.packetStateData.isSlowedByUsingItem()
+                    && !player.packetStateData.lastPacketWasTeleport
+                    && !player.packetStateData.lastPacketWasOnePointSeventeenDuplicate) {
+                if (player.packetStateData.eatingHand != InteractionHand.OFF_HAND
+                        && player.packetStateData.getSlowedByUsingItemSlot() != player.packetStateData.lastSlotSelected
+                        || player.getInventory().getItemInHand(player.packetStateData.eatingHand).isEmpty()) {
                     player.packetStateData.setSlowedByUsingItem(false);
                     player.checkManager.getPostPredictionCheck(NoSlowA.class).didSlotChangeLastTick = true;
                 }
@@ -196,7 +196,7 @@ public class PacketPlayerDigging extends PacketListenerAbstract {
 
             if (player.packetStateData.lastSlotSelected != slot) {
                 // just assume they tick after this
-                if (!player.isTickingReliablyFor(3) && player.skippedTickInActualMovement) {
+                if (player.getClientVersion().isNewerThanOrEquals(ClientVersion.V_1_9) && !player.supportsEndTick() && !player.isTickingReliablyFor(3) && player.packetStateData.eatingHand != InteractionHand.OFF_HAND) {
                     player.packetStateData.setSlowedByUsingItem(false);
                 }
             }
@@ -220,13 +220,7 @@ public class PacketPlayerDigging extends PacketListenerAbstract {
             final ItemStack item = hand == InteractionHand.MAIN_HAND ?
                     player.getInventory().getHeldItem() : player.getInventory().getOffHand();
 
-            final boolean wasSlow = player.packetStateData.isSlowedByUsingItem();
-
             handleUseItem(player, item, hand);
-
-            if (!wasSlow) {
-                player.checkManager.getPostPredictionCheck(NoSlowD.class).startedSprintingBeforeUse = player.packetStateData.isSlowedByUsingItem() && player.isSprinting;
-            }
         }
     }
 }

src/main/java/ac/grim/grimac/events/packets/PacketPlayerJoinQuit.java

@@ -36,6 +36,9 @@ public class PacketPlayerJoinQuit extends PacketListenerAbstract {
         }
         if (player.hasPermission("grim.alerts") && player.hasPermission("grim.alerts.enable-on-join")) {
             GrimAPI.INSTANCE.getAlertManager().toggleAlerts(player);
+            if (player.hasPermission("grim.verbose") && player.hasPermission("grim.verbose.enable-on-join")) {
+                GrimAPI.INSTANCE.getAlertManager().toggleVerbose(player);
+            }
         }
         if (player.hasPermission("grim.spectate") && GrimAPI.INSTANCE.getConfigManager().getConfig().getBooleanElse("spectators.hide-regardless", false)) {
             GrimAPI.INSTANCE.getSpectateManager().onLogin(player);

src/main/java/ac/grim/grimac/events/packets/PacketPlayerRespawn.java

@@ -3,6 +3,7 @@ package ac.grim.grimac.events.packets;
 import ac.grim.grimac.GrimAPI;
 import ac.grim.grimac.checks.impl.badpackets.BadPacketsE;
 import ac.grim.grimac.checks.impl.badpackets.BadPacketsF;
+import ac.grim.grimac.checks.impl.badpackets.BadPacketsG;
 import ac.grim.grimac.player.GrimPlayer;
 import ac.grim.grimac.utils.data.TrackerData;
 import ac.grim.grimac.utils.data.packetentity.PacketEntitySelf;
@@ -130,9 +131,12 @@ public class PacketPlayerRespawn extends PacketListenerAbstract {
                 player.compensatedEntities.serverPositionsMap.clear();
             }
 
-            // TODO: What does keep all metadata do?
             player.latencyUtils.addRealTimeTask(player.lastTransactionSent.get() + 1, () -> {
-                player.isSneaking = false;
+                // From 1.16 to 1.19, this doesn't get set to false for whatever reason
+                if (player.getClientVersion().isOlderThan(ClientVersion.V_1_16) || player.getClientVersion().isNewerThanOrEquals(ClientVersion.V_1_20)) {
+                    player.isSneaking = false;
+                }
+
                 player.lastOnGround = false;
                 player.onGround = false;
                 player.isInBed = false;
@@ -141,8 +145,16 @@ public class PacketPlayerRespawn extends PacketListenerAbstract {
                 player.packetStateData.lastClaimedPosition = new Vector3d();
                 player.filterMojangStupidityOnMojangStupidity = new Vector3d();
 
+                final boolean keepTrackedData = this.hasFlag(respawn, KEEP_TRACKED_DATA);
+
+                if (!keepTrackedData) {
+                    player.powderSnowFrozenTicks = 0;
+                    player.compensatedEntities.getSelf().hasGravity = true;
+                    player.playerEntityHasGravity = true;
+                }
+
                 if (player.getClientVersion().isNewerThanOrEquals(ClientVersion.V_1_19_4)) {
-                    if (!this.hasFlag(respawn, KEEP_TRACKED_DATA)) {
+                    if (!keepTrackedData) {
                         player.isSprinting = false;
                     }
                 } else {
@@ -150,6 +162,7 @@ public class PacketPlayerRespawn extends PacketListenerAbstract {
                 }
 
                 player.checkManager.getPacketCheck(BadPacketsE.class).handleRespawn(); // Reminder ticks reset
+                player.checkManager.getPacketCheck(BadPacketsG.class).handleRespawn();
 
                 // compensate for immediate respawn gamerule
                 if (player.getClientVersion().isNewerThanOrEquals(ClientVersion.V_1_15)) {
@@ -184,7 +197,6 @@ public class PacketPlayerRespawn extends PacketListenerAbstract {
                     player.compensatedWorld.setDimension(respawn.getDimensionType(), event.getUser());
                 }
 
-                // TODO And there should probably be some attribute holder that we can just call reset() on.
                 if (player.getClientVersion().isNewerThanOrEquals(ClientVersion.V_1_16) && !this.hasFlag(respawn, KEEP_ATTRIBUTES)) {
                     // Reset attributes if not kept
                     player.compensatedEntities.getSelf().resetAttributes();

src/main/java/ac/grim/grimac/events/packets/PacketPlayerSteer.java

@@ -3,6 +3,7 @@ package ac.grim.grimac.events.packets;
 import ac.grim.grimac.GrimAPI;
 import ac.grim.grimac.player.GrimPlayer;
 import ac.grim.grimac.utils.collisions.datatypes.SimpleCollisionBox;
+import ac.grim.grimac.utils.data.KnownInput;
 import ac.grim.grimac.utils.data.packetentity.PacketEntity;
 import ac.grim.grimac.utils.data.packetentity.PacketEntityHorse;
 import com.github.retrooper.packetevents.PacketEvents;
@@ -10,9 +11,9 @@ import com.github.retrooper.packetevents.event.PacketListenerAbstract;
 import com.github.retrooper.packetevents.event.PacketListenerPriority;
 import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.manager.server.ServerVersion;
-import com.github.retrooper.packetevents.protocol.entity.type.EntityTypes;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.protocol.player.ClientVersion;
+import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerInput;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientSteerVehicle;
 
 public class PacketPlayerSteer extends PacketListenerAbstract {
@@ -23,13 +24,12 @@ public class PacketPlayerSteer extends PacketListenerAbstract {
 
     @Override
     public void onPacketReceive(PacketReceiveEvent event) {
-
         if (event.getPacketType() == PacketType.Play.Client.STEER_VEHICLE) {
-            WrapperPlayClientSteerVehicle steer = new WrapperPlayClientSteerVehicle(event);
-
             GrimPlayer player = GrimAPI.INSTANCE.getPlayerDataManager().getPlayer(event.getUser());
             if (player == null) return;
 
+            WrapperPlayClientSteerVehicle steer = new WrapperPlayClientSteerVehicle(event);
+
             float forwards = steer.getForward();
             float sideways = steer.getSideways();
 
@@ -100,6 +100,33 @@ public class PacketPlayerSteer extends PacketListenerAbstract {
             }
 
             player.packetStateData.receivedSteerVehicle = true;
+        } else if (event.getPacketType() == PacketType.Play.Client.PLAYER_INPUT) {
+            GrimPlayer player = GrimAPI.INSTANCE.getPlayerDataManager().getPlayer(event.getUser());
+            if (player == null) return;
+
+            WrapperPlayClientPlayerInput input = new WrapperPlayClientPlayerInput(event);
+            byte forward = 0;
+            byte sideways = 0;
+            if (input.isForward()) {
+                forward++;
+            }
+
+            if (input.isBackward()) {
+                forward--;
+            }
+
+            if (input.isLeft()) {
+                sideways++;
+            }
+
+            if (input.isRight()) {
+                sideways--;
+            }
+
+            player.vehicleData.nextVehicleForward = forward * 0.98f;
+            player.vehicleData.nextVehicleHorizontal = sideways * 0.98f;
+
+            player.packetStateData.knownInput = new KnownInput(input.isForward(), input.isBackward(), input.isLeft(), input.isRight(), input.isJump(), input.isShift(), input.isSprint());
         }
     }
 }

src/main/java/ac/grim/grimac/events/packets/PacketSelfMetadataListener.java

@@ -1,7 +1,6 @@
 package ac.grim.grimac.events.packets;
 
 import ac.grim.grimac.GrimAPI;
-import ac.grim.grimac.checks.impl.movement.NoSlowD;
 import ac.grim.grimac.player.GrimPlayer;
 import ac.grim.grimac.utils.nmsutil.WatchableIndexUtil;
 import com.github.retrooper.packetevents.PacketEvents;
@@ -24,6 +23,7 @@ import java.util.List;
 import java.util.Optional;
 
 public class PacketSelfMetadataListener extends PacketListenerAbstract {
+
     public PacketSelfMetadataListener() {
         super(PacketListenerPriority.HIGH);
     }
@@ -68,6 +68,7 @@ public class PacketSelfMetadataListener extends PacketListenerAbstract {
                     // Remove the pose metadata from the list
                     metadataStuff.removeIf(element -> element.getIndex() == 6);
                     entityMetadata.setEntityMetadata(metadataStuff);
+                    event.markForReEncode(true);
                 }
 
                 EntityData watchable = WatchableIndexUtil.getIndex(entityMetadata.getEntityMetadata(), 0);
@@ -207,8 +208,6 @@ public class PacketSelfMetadataListener extends PacketListenerAbstract {
                                     // The above line is a hack to fake activate use item
                                     player.packetStateData.setSlowedByUsingItem(isActive);
 
-                                    player.checkManager.getPostPredictionCheck(NoSlowD.class).startedSprintingBeforeUse = player.packetStateData.isSlowedByUsingItem() && player.isSprinting;
-
                                     if (isActive) {
                                         player.packetStateData.eatingHand = isOffhand ? InteractionHand.OFF_HAND : InteractionHand.MAIN_HAND;
                                     }

src/main/java/ac/grim/grimac/events/packets/PacketServerTeleport.java

@@ -6,14 +6,12 @@ import ac.grim.grimac.utils.data.Pair;
 import com.github.retrooper.packetevents.PacketEvents;
 import com.github.retrooper.packetevents.event.PacketListenerAbstract;
 import com.github.retrooper.packetevents.event.PacketListenerPriority;
-import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.event.PacketSendEvent;
 import com.github.retrooper.packetevents.manager.server.ServerVersion;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.protocol.player.ClientVersion;
 import com.github.retrooper.packetevents.protocol.teleport.RelativeFlag;
 import com.github.retrooper.packetevents.util.Vector3d;
-import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientTeleportConfirm;
 import com.github.retrooper.packetevents.wrapper.play.server.WrapperPlayServerPlayerPositionAndLook;
 import com.github.retrooper.packetevents.wrapper.play.server.WrapperPlayServerVehicleMove;
 import org.bukkit.Location;

src/main/java/ac/grim/grimac/events/packets/ProxyAlertMessenger.java

@@ -99,4 +99,4 @@ public class ProxyAlertMessenger extends PacketListenerAbstract {
         if (!file.exists()) return false;
         return YamlConfiguration.loadConfiguration(file).getBoolean(pathToValue);
     }
-}
+}

src/main/java/ac/grim/grimac/events/packets/patch/ResyncWorldUtil.java

@@ -9,9 +9,13 @@ import com.github.retrooper.packetevents.manager.server.ServerVersion;
 import com.github.retrooper.packetevents.netty.channel.ChannelHelper;
 import com.github.retrooper.packetevents.protocol.world.states.WrappedBlockState;
 import com.github.retrooper.packetevents.util.Vector3i;
+import com.github.retrooper.packetevents.wrapper.play.server.WrapperPlayServerAcknowledgeBlockChanges;
+import com.github.retrooper.packetevents.wrapper.play.server.WrapperPlayServerBlockChange;
 import com.github.retrooper.packetevents.wrapper.play.server.WrapperPlayServerMultiBlockChange;
 import io.github.retrooper.packetevents.util.folia.FoliaScheduler;
 import org.bukkit.Chunk;
+import org.bukkit.Location;
+import org.bukkit.World;
 import org.bukkit.block.Block;
 import org.bukkit.block.data.BlockData;
 
@@ -35,18 +39,20 @@ public class ResyncWorldUtil {
                 || !player.compensatedWorld.isChunkLoaded(maxBlockX >> 4, minBlockZ >> 4) || !player.compensatedWorld.isChunkLoaded(maxBlockX >> 4, maxBlockZ >> 4))
             return;
 
+        if (player.bukkitPlayer == null) return;
+        World world = player.bukkitPlayer.getWorld();
+
         // Takes 0.15ms or so to complete. Not bad IMO. Unsure how I could improve this other than sending packets async.
         // But that's on PacketEvents.
-        FoliaScheduler.getEntityScheduler().execute(player.bukkitPlayer, GrimAPI.INSTANCE.getPlugin(), () -> {
+        FoliaScheduler.getRegionScheduler().execute(GrimAPI.INSTANCE.getPlugin(), world,
+                minBlockX >> 4, minBlockZ >> 4, () -> {
             boolean flat = PacketEvents.getAPI().getServerManager().getVersion().isNewerThanOrEquals(ServerVersion.V_1_13);
-
-            if (player.bukkitPlayer == null) return;
             // Player hasn't spawned, don't spam packets
             if (!player.getSetbackTeleportUtil().hasAcceptedSpawnTeleport) return;
 
             // Check the 4 corners of the BB for loaded chunks, don't freeze main thread to load chunks.
-            if (!player.bukkitPlayer.getWorld().isChunkLoaded(minBlockX >> 4, minBlockZ >> 4) || !player.bukkitPlayer.getWorld().isChunkLoaded(minBlockX >> 4, maxBlockZ >> 4)
-                    || !player.bukkitPlayer.getWorld().isChunkLoaded(maxBlockX >> 4, minBlockZ >> 4) || !player.bukkitPlayer.getWorld().isChunkLoaded(maxBlockX >> 4, maxBlockZ >> 4))
+            if (!world.isChunkLoaded(minBlockX >> 4, minBlockZ >> 4) || !world.isChunkLoaded(minBlockX >> 4, maxBlockZ >> 4)
+                    || !world.isChunkLoaded(maxBlockX >> 4, minBlockZ >> 4) || !world.isChunkLoaded(maxBlockX >> 4, maxBlockZ >> 4))
                 return;
 
             // This is based on Tuinity's code, thanks leaf. Now merged into paper.
@@ -75,7 +81,7 @@ public class ResyncWorldUtil {
                     int minX = currChunkX == minChunkX ? minBlockX & 15 : 0; // coordinate in chunk
                     int maxX = currChunkX == maxChunkX ? maxBlockX & 15 : 15; // coordinate in chunk
 
-                    Chunk chunk = player.bukkitPlayer.getWorld().getChunkAt(currChunkX, currChunkZ);
+                    Chunk chunk = world.getChunkAt(currChunkX, currChunkZ);
 
                     for (int currChunkY = minChunkY; currChunkY <= maxChunkY; ++currChunkY) {
                         int minY = currChunkY == minChunkY ? minBlockY & 15 : 0; // coordinate in chunk
@@ -111,6 +117,37 @@ public class ResyncWorldUtil {
                     }
                 }
             }
-        }, null, 0);
+        });
+    }
+
+    public static void resyncPosition(GrimPlayer player, Vector3i pos, int sequence) {
+        if (player.bukkitPlayer == null) return;
+
+        final int chunkX = pos.x >> 4;
+        final int chunkZ = pos.z >> 4;
+        final World world = player.bukkitPlayer.getWorld();
+
+        FoliaScheduler.getRegionScheduler().execute(GrimAPI.INSTANCE.getPlugin(), world, chunkX, chunkZ, () -> {
+            if (!player.bukkitPlayer.isOnline() || !player.getSetbackTeleportUtil().hasAcceptedSpawnTeleport) return;
+
+            if (!player.compensatedWorld.isChunkLoaded(chunkX, chunkZ)) return;
+            if (player.bukkitPlayer.getLocation().distance(new Location(world, pos.x, pos.y, pos.z)) >= 64) return;
+            if (!world.isChunkLoaded(chunkX, chunkZ)) return; // Don't load chunks sync
+
+            final Block block = world.getChunkAt(chunkX, chunkZ).getBlock(pos.x & 15, pos.y, pos.z & 15);
+
+            final int blockId;
+            if (PacketEvents.getAPI().getServerManager().getVersion().isNewerThanOrEquals(ServerVersion.V_1_13)) {
+                // Cache this because strings are expensive
+                blockId = blockDataToId.computeIfAbsent(block.getBlockData(), data -> WrappedBlockState.getByString(PacketEvents.getAPI().getServerManager().getVersion().toClientVersion(), data.getAsString(false)).getGlobalId());
+            } else {
+                blockId = (block.getType().getId() << 4) | block.getData();
+            }
+
+            player.user.sendPacket(new WrapperPlayServerBlockChange(pos, blockId));
+            if (PacketEvents.getAPI().getServerManager().getVersion().isNewerThanOrEquals(ServerVersion.V_1_19)) { // Via will handle this for us pre-1.19
+                player.user.sendPacket(new WrapperPlayServerAcknowledgeBlockChanges(sequence)); // Make 1.19 clients apply the changes
+            }
+        });
     }
 }

src/main/java/ac/grim/grimac/events/packets/worldreader/BasePacketWorldReader.java

@@ -174,4 +174,4 @@ public class BasePacketWorldReader extends PacketListenerAbstract {
             player.latencyUtils.addRealTimeTask(player.lastTransactionSent.get(), () -> player.compensatedWorld.updateBlock(blockChange.getX(), blockChange.getY(), blockChange.getZ(), blockChange.getBlockId()));
         }
     }
-}
+}

src/main/java/ac/grim/grimac/events/packets/worldreader/PacketWorldReaderEight.java

@@ -15,7 +15,7 @@ import java.util.BitSet;
 public class PacketWorldReaderEight extends BasePacketWorldReader {
     @Override
     public void handleMapChunkBulk(final GrimPlayer player, final PacketSendEvent event) {
-        PacketWrapper wrapper = new PacketWrapper(event);
+        PacketWrapper<?> wrapper = new PacketWrapper<>(event);
         ByteBuf buffer = (ByteBuf) wrapper.getBuffer();
 
         boolean skylight = wrapper.readBoolean();
@@ -47,7 +47,7 @@ public class PacketWorldReaderEight extends BasePacketWorldReader {
 
     @Override
     public void handleMapChunk(final GrimPlayer player, final PacketSendEvent event) {
-        PacketWrapper wrapper = new PacketWrapper(event);
+        PacketWrapper<?> wrapper = new PacketWrapper<>(event);
 
         final int chunkX = wrapper.readInt();
         final int chunkZ = wrapper.readInt();

src/main/java/ac/grim/grimac/manager/ActionManager.java

@@ -6,7 +6,6 @@ import ac.grim.grimac.player.GrimPlayer;
 import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientInteractEntity;
-import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerFlying;
 import lombok.Getter;
 
 @Getter
@@ -27,7 +26,7 @@ public class ActionManager extends Check implements PacketCheck {
                 attacking = true;
                 lastAttack = System.currentTimeMillis();
             }
-        } else if (WrapperPlayClientPlayerFlying.isFlying(event.getPacketType())) {
+        } else if (isTickPacketIncludingNonMovement(event.getPacketType())) {
             player.totalFlyingPacketsSent++;
             attacking = false;
         }

src/main/java/ac/grim/grimac/manager/CheckManager.java

@@ -1,22 +1,25 @@
 package ac.grim.grimac.manager;
 
-
 import ac.grim.grimac.api.AbstractCheck;
 import ac.grim.grimac.checks.impl.aim.AimDuplicateLook;
 import ac.grim.grimac.checks.impl.aim.AimModulo360;
 import ac.grim.grimac.checks.impl.aim.processor.AimProcessor;
 import ac.grim.grimac.checks.impl.badpackets.*;
+import ac.grim.grimac.checks.impl.combat.MultiInteractA;
+import ac.grim.grimac.checks.impl.combat.MultiInteractB;
 import ac.grim.grimac.checks.impl.combat.Reach;
 import ac.grim.grimac.checks.impl.crash.*;
 import ac.grim.grimac.checks.impl.exploit.ExploitA;
 import ac.grim.grimac.checks.impl.exploit.ExploitB;
+import ac.grim.grimac.checks.impl.exploit.ExploitC;
 import ac.grim.grimac.checks.impl.groundspoof.NoFallA;
 import ac.grim.grimac.checks.impl.misc.ClientBrand;
 import ac.grim.grimac.checks.impl.misc.FastBreak;
 import ac.grim.grimac.checks.impl.misc.GhostBlockMitigation;
 import ac.grim.grimac.checks.impl.misc.TransactionOrder;
 import ac.grim.grimac.checks.impl.movement.*;
-import ac.grim.grimac.checks.impl.post.PostCheck;
+import ac.grim.grimac.checks.impl.multiactions.*;
+import ac.grim.grimac.checks.impl.post.Post;
 import ac.grim.grimac.checks.impl.prediction.DebugHandler;
 import ac.grim.grimac.checks.impl.prediction.NoFallB;
 import ac.grim.grimac.checks.impl.prediction.OffsetHandler;
@@ -42,14 +45,22 @@ import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.event.PacketSendEvent;
 import com.google.common.collect.ClassToInstanceMap;
 import com.google.common.collect.ImmutableClassToInstanceMap;
+import org.bukkit.Bukkit;
+import org.bukkit.permissions.Permission;
+import org.bukkit.permissions.PermissionDefault;
+
+import java.util.concurrent.atomic.AtomicBoolean;
 
 public class CheckManager {
+    private static boolean inited;
+    private static final AtomicBoolean initedAtomic = new AtomicBoolean(false);
+
     ClassToInstanceMap<PacketCheck> packetChecks;
     ClassToInstanceMap<PositionCheck> positionCheck;
     ClassToInstanceMap<RotationCheck> rotationCheck;
     ClassToInstanceMap<VehicleCheck> vehicleCheck;
     ClassToInstanceMap<PacketCheck> prePredictionChecks;
-
+    ClassToInstanceMap<BlockBreakCheck> blockBreakChecks;
     ClassToInstanceMap<BlockPlaceCheck> blockPlaceCheck;
     ClassToInstanceMap<PostPredictionCheck> postPredictionCheck;
 
@@ -89,12 +100,13 @@ public class CheckManager {
                 .put(BadPacketsS.class, new BadPacketsS(player))
                 .put(BadPacketsT.class, new BadPacketsT(player))
                 .put(BadPacketsU.class, new BadPacketsU(player))
-                .put(BadPacketsV.class, new BadPacketsV(player))
                 .put(BadPacketsW.class, new BadPacketsW(player))
-                .put(BadPacketsX.class, new BadPacketsX(player))
                 .put(BadPacketsY.class, new BadPacketsY(player))
-                .put(BadPacketsZ.class, new BadPacketsZ(player))
-                .put(FastBreak.class, new FastBreak(player))
+                .put(MultiActionsA.class, new MultiActionsA(player))
+                .put(MultiActionsB.class, new MultiActionsB(player))
+                .put(MultiActionsC.class, new MultiActionsC(player))
+                .put(MultiActionsD.class, new MultiActionsD(player))
+                .put(MultiActionsE.class, new MultiActionsE(player))
                 .put(TransactionOrder.class, new TransactionOrder(player))
                 .put(NoSlowB.class, new NoSlowB(player))
                 .put(SetbackBlocker.class, new SetbackBlocker(player)) // Must be last class otherwise we can't check while blocking packets
@@ -119,7 +131,7 @@ public class CheckManager {
                 .put(KnockbackHandler.class, new KnockbackHandler(player))
                 .put(GhostBlockDetector.class, new GhostBlockDetector(player))
                 .put(Phase.class, new Phase(player))
-                .put(PostCheck.class, new PostCheck(player))
+                .put(Post.class, new Post(player))
                 .put(NoFallB.class, new NoFallB(player))
                 .put(OffsetHandler.class, new OffsetHandler(player))
                 .put(SuperDebug.class, new SuperDebug(player))
@@ -129,6 +141,8 @@ public class CheckManager {
                 .put(NoSlowC.class, new NoSlowC(player))
                 .put(NoSlowD.class, new NoSlowD(player))
                 .put(NoSlowE.class, new NoSlowE(player))
+                .put(MultiInteractA.class, new MultiInteractA(player))
+                .put(MultiInteractB.class, new MultiInteractB(player))
                 .put(SetbackTeleportUtil.class, new SetbackTeleportUtil(player)) // Avoid teleporting to new position, update safe pos last
                 .put(CompensatedFireworks.class, player.compensatedFireworks)
                 .put(SneakingEstimator.class, new SneakingEstimator(player))
@@ -139,6 +153,8 @@ public class CheckManager {
                 .put(InvalidPlaceA.class, new InvalidPlaceA(player))
                 .put(InvalidPlaceB.class, new InvalidPlaceB(player))
                 .put(AirLiquidPlace.class, new AirLiquidPlace(player))
+                .put(MultiPlace.class, new MultiPlace(player))
+                .put(MultiActionsF.class, new MultiActionsF(player))
                 .put(FarPlace.class, new FarPlace(player))
                 .put(FabricatedPlace.class, new FabricatedPlace(player))
                 .put(PositionPlace.class, new PositionPlace(player))
@@ -149,6 +165,7 @@ public class CheckManager {
 
         prePredictionChecks = new ImmutableClassToInstanceMap.Builder<PacketCheck>()
                 .put(TimerCheck.class, new TimerCheck(player))
+                .put(TickTimer.class, new TickTimer(player))
                 .put(CrashA.class, new CrashA(player))
                 .put(CrashB.class, new CrashB(player))
                 .put(CrashC.class, new CrashC(player))
@@ -159,9 +176,16 @@ public class CheckManager {
                 .put(CrashH.class, new CrashH(player))
                 .put(ExploitA.class, new ExploitA(player))
                 .put(ExploitB.class, new ExploitB(player))
+                .put(ExploitC.class, new ExploitC(player))
                 .put(VehicleTimer.class, new VehicleTimer(player))
                 .build();
 
+        blockBreakChecks = new ImmutableClassToInstanceMap.Builder<BlockBreakCheck>()
+                .put(BadPacketsX.class, new BadPacketsX(player))
+                .put(BadPacketsZ.class, new BadPacketsZ(player))
+                .put(FastBreak.class, new FastBreak(player))
+                .build();
+
         allChecks = new ImmutableClassToInstanceMap.Builder<AbstractCheck>()
                 .putAll(packetChecks)
                 .putAll(positionCheck)
@@ -170,7 +194,10 @@ public class CheckManager {
                 .putAll(postPredictionCheck)
                 .putAll(blockPlaceCheck)
                 .putAll(prePredictionChecks)
+                .putAll(blockBreakChecks)
                 .build();
+
+        init();
     }
 
     @SuppressWarnings("unchecked")
@@ -201,6 +228,12 @@ public class CheckManager {
         for (PostPredictionCheck check : postPredictionCheck.values()) {
             check.onPacketReceive(packet);
         }
+        for (BlockPlaceCheck check : blockPlaceCheck.values()) {
+            check.onPacketReceive(packet);
+        }
+        for (BlockBreakCheck check : blockBreakChecks.values()) {
+            check.onPacketReceive(packet);
+        }
     }
 
     public void onPacketSend(final PacketSendEvent packet) {
@@ -213,6 +246,12 @@ public class CheckManager {
         for (PostPredictionCheck check : postPredictionCheck.values()) {
             check.onPacketSend(packet);
         }
+        for (BlockPlaceCheck check : blockPlaceCheck.values()) {
+            check.onPacketSend(packet);
+        }
+        for (BlockBreakCheck check : blockBreakChecks.values()) {
+            check.onPacketSend(packet);
+        }
     }
 
     public void onPositionUpdate(final PositionUpdate position) {
@@ -240,6 +279,12 @@ public class CheckManager {
         for (PostPredictionCheck check : postPredictionCheck.values()) {
             check.onPredictionComplete(complete);
         }
+        for (BlockPlaceCheck check : blockPlaceCheck.values()) {
+            check.onPredictionComplete(complete);
+        }
+        for (BlockBreakCheck check : blockBreakChecks.values()) {
+            check.onPredictionComplete(complete);
+        }
     }
 
     public void onBlockPlace(final BlockPlace place) {
@@ -254,6 +299,12 @@ public class CheckManager {
         }
     }
 
+    public void onBlockBreak(final BlockBreak blockBreak) {
+        for (BlockBreakCheck check : blockBreakChecks.values()) {
+            check.onBlockBreak(blockBreak);
+        }
+    }
+
     public ExplosionHandler getExplosionHandler() {
         return getPostPredictionCheck(ExplosionHandler.class);
     }
@@ -314,4 +365,25 @@ public class CheckManager {
     public <T extends PostPredictionCheck> T getPostPredictionCheck(Class<T> check) {
         return (T) postPredictionCheck.get(check);
     }
+
+    private void init() {
+        // Fast non-thread safe check
+        if (inited) return;
+        // Slow thread safe check
+        if (!initedAtomic.compareAndSet(false, true)) return;
+        inited = true;
+
+        for (AbstractCheck check : allChecks.values()) {
+            if (check.getCheckName() != null) {
+                String permissionName = "grim.exempt." + check.getCheckName().toLowerCase();
+                Permission permission = Bukkit.getPluginManager().getPermission(permissionName);
+
+                if (permission == null) {
+                    Bukkit.getPluginManager().addPermission(new Permission(permissionName, PermissionDefault.FALSE));
+                } else {
+                    permission.setDefault(PermissionDefault.FALSE);
+                }
+            }
+        }
+    }
 }

src/main/java/ac/grim/grimac/manager/DiscordManager.java

@@ -19,6 +19,7 @@ public class DiscordManager implements Initable {
     private static WebhookClient client;
     private int embedColor;
     private String staticContent = "";
+    private String embedTitle = "";
 
     public static final Pattern WEBHOOK_PATTERN = Pattern.compile("(?:https?://)?(?:\\w+\\.)?\\w+\\.\\w+/api(?:/v\\d+)?/webhooks/(\\d+)/([\\w-]+)(?:/(?:\\w+)?)?");
 
@@ -40,6 +41,8 @@ public class DiscordManager implements Initable {
             client = WebhookClient.withId(Long.parseUnsignedLong(matcher.group(1)), matcher.group(2));
             client.setTimeout(15000); // Requests expire after 15 seconds
 
+            embedTitle = GrimAPI.INSTANCE.getConfigManager().getConfig().getStringElse("embed-title", "**Grim Alert**");
+
             try {
                 embedColor = Color.decode(GrimAPI.INSTANCE.getConfigManager().getConfig().getStringElse("embed-color", "#00FFFF")).getRGB();
             } catch (NumberFormatException e) {
@@ -67,12 +70,12 @@ public class DiscordManager implements Initable {
         return list;
     }
 
-    public void sendAlert(GrimPlayer player, String verbose, String checkName, String violations) {
+    public void sendAlert(GrimPlayer player, String verbose, String checkName, int violations) {
         if (client != null) {
 
-            String content = staticContent + "";
+            String content = staticContent;
             content = content.replace("%check%", checkName);
-            content = content.replace("%violations%", violations);
+            content = content.replace("%violations%", Integer.toString(violations));
             content = GrimAPI.INSTANCE.getExternalAPI().replaceVariables(player, content, false);
             content = content.replace("_", "\\_");
 
@@ -80,7 +83,7 @@ public class DiscordManager implements Initable {
                     .setImageUrl("https://i.stack.imgur.com/Fzh0w.png") // Constant width
                     .setThumbnailUrl("https://crafthead.net/helm/" + player.user.getProfile().getUUID())
                     .setColor(embedColor)
-                    .setTitle(new WebhookEmbed.EmbedTitle("**Grim Alert**", null))
+                    .setTitle(new WebhookEmbed.EmbedTitle(embedTitle, null))
                     .setDescription(content)
                     .setTimestamp(Instant.now())
                     .setFooter(new WebhookEmbed.EmbedFooter("", "https://grim.ac/images/grim.png"));