diff --git a/src/PocketMine.php b/src/PocketMine.php
index 53c794af9e0..e23734adb1d 100644
--- a/src/PocketMine.php
+++ b/src/PocketMine.php
@@ -70,6 +70,7 @@
 use const PHP_EOL;
 use const PHP_INT_SIZE;
 use const PHP_VERSION;
+use const PTHREADS_INHERIT_NONE;
 
 	require_once __DIR__ . '/VersionInfo.php';
 
diff --git a/src/block/BlockFactory.php b/src/block/BlockFactory.php
index ec97df002a9..c8d99309017 100644
--- a/src/block/BlockFactory.php
+++ b/src/block/BlockFactory.php
@@ -503,7 +503,7 @@ public function getBreakTime(Item $item) : float{
 			$this->remap($magicNumber >= 4 ? Ids::LOG2 : Ids::LOG, ($magicNumber & 0x03) | 0b1100, $wood);
 
 			$allSidedLogs[] = $wood;
-			$allSidedLogs[] = new Wood(new BID(Ids::WOOD, $magicNumber | BlockLegacyMetadata::WOOD_FLAG_STRIPPED), "Stripped $name Wood", $logBreakInfo, $treeType, true);
+			$allSidedLogs[] = new Wood(new BID(Ids::WOOD, $magicNumber | Meta::WOOD_FLAG_STRIPPED), "Stripped $name Wood", $logBreakInfo, $treeType, true);
 
 			$this->registerAllMeta(new Log(BlockLegacyIdHelper::getStrippedLogIdentifier($treeType), "Stripped " . $name . " Log", $logBreakInfo, $treeType, true));
 			$this->registerAllMeta(new FenceGate(BlockLegacyIdHelper::getWoodenFenceIdentifier($treeType), $name . " Fence Gate", $planksBreakInfo));
@@ -608,12 +608,12 @@ public function getBreakTime(Item $item) : float{
 			BreakInfo::instant(),
 		));
 		$this->registerAllMeta(new FloorCoralFan(
-			new BlockIdentifierFlattened(Ids::CORAL_FAN, [Ids::CORAL_FAN_DEAD], 0, ItemIds::CORAL_FAN),
+			new BIDFlattened(Ids::CORAL_FAN, [Ids::CORAL_FAN_DEAD], 0, ItemIds::CORAL_FAN),
 			"Coral Fan",
 			BreakInfo::instant(),
 		));
 		$this->registerAllMeta(new WallCoralFan(
-			new BlockIdentifierFlattened(Ids::CORAL_FAN_HANG, [Ids::CORAL_FAN_HANG2, Ids::CORAL_FAN_HANG3], 0, ItemIds::CORAL_FAN),
+			new BIDFlattened(Ids::CORAL_FAN_HANG, [Ids::CORAL_FAN_HANG2, Ids::CORAL_FAN_HANG3], 0, ItemIds::CORAL_FAN),
 			"Wall Coral Fan",
 			BreakInfo::instant(),
 		));
@@ -956,7 +956,7 @@ private function registerAllMeta(Block $default, Block ...$additional) : void{
 	private function registerSlabWithDoubleHighBitsRemapping(Slab $block) : void{
 		$this->register($block);
 		$identifierFlattened = $block->getIdInfo();
-		if($identifierFlattened instanceof BlockIdentifierFlattened){
+		if($identifierFlattened instanceof BIDFlattened){
 			$this->remap($identifierFlattened->getSecondId(), $identifierFlattened->getVariant() | 0x8, $block->setSlabType(SlabType::DOUBLE()));
 		}
 	}
diff --git a/src/block/BlockLegacyIdHelper.php b/src/block/BlockLegacyIdHelper.php
index 50d6b86b4fd..6e493184873 100644
--- a/src/block/BlockLegacyIdHelper.php
+++ b/src/block/BlockLegacyIdHelper.php
@@ -69,61 +69,61 @@ public static function getWoodenWallSignIdentifier(TreeType $treeType) : BID{
 		throw new AssumptionFailedError("Switch should cover all wood types");
 	}
 
-	public static function getWoodenTrapdoorIdentifier(TreeType $treeType) : BlockIdentifier{
+	public static function getWoodenTrapdoorIdentifier(TreeType $treeType) : BID{
 		switch($treeType->id()){
 			case TreeType::OAK()->id():
-				return new BlockIdentifier(Ids::WOODEN_TRAPDOOR, 0);
+				return new BID(Ids::WOODEN_TRAPDOOR, 0);
 			case TreeType::SPRUCE()->id():
-				return new BlockIdentifier(Ids::SPRUCE_TRAPDOOR, 0);
+				return new BID(Ids::SPRUCE_TRAPDOOR, 0);
 			case TreeType::BIRCH()->id():
-				return new BlockIdentifier(Ids::BIRCH_TRAPDOOR, 0);
+				return new BID(Ids::BIRCH_TRAPDOOR, 0);
 			case TreeType::JUNGLE()->id():
-				return new BlockIdentifier(Ids::JUNGLE_TRAPDOOR, 0);
+				return new BID(Ids::JUNGLE_TRAPDOOR, 0);
 			case TreeType::ACACIA()->id():
-				return new BlockIdentifier(Ids::ACACIA_TRAPDOOR, 0);
+				return new BID(Ids::ACACIA_TRAPDOOR, 0);
 			case TreeType::DARK_OAK()->id():
-				return new BlockIdentifier(Ids::DARK_OAK_TRAPDOOR, 0);
+				return new BID(Ids::DARK_OAK_TRAPDOOR, 0);
 		}
 		throw new AssumptionFailedError("Switch should cover all wood types");
 	}
 
-	public static function getWoodenButtonIdentifier(TreeType $treeType) : BlockIdentifier{
+	public static function getWoodenButtonIdentifier(TreeType $treeType) : BID{
 		switch($treeType->id()){
 			case TreeType::OAK()->id():
-				return new BlockIdentifier(Ids::WOODEN_BUTTON, 0);
+				return new BID(Ids::WOODEN_BUTTON, 0);
 			case TreeType::SPRUCE()->id():
-				return new BlockIdentifier(Ids::SPRUCE_BUTTON, 0);
+				return new BID(Ids::SPRUCE_BUTTON, 0);
 			case TreeType::BIRCH()->id():
-				return new BlockIdentifier(Ids::BIRCH_BUTTON, 0);
+				return new BID(Ids::BIRCH_BUTTON, 0);
 			case TreeType::JUNGLE()->id():
-				return new BlockIdentifier(Ids::JUNGLE_BUTTON, 0);
+				return new BID(Ids::JUNGLE_BUTTON, 0);
 			case TreeType::ACACIA()->id():
-				return new BlockIdentifier(Ids::ACACIA_BUTTON, 0);
+				return new BID(Ids::ACACIA_BUTTON, 0);
 			case TreeType::DARK_OAK()->id():
-				return new BlockIdentifier(Ids::DARK_OAK_BUTTON, 0);
+				return new BID(Ids::DARK_OAK_BUTTON, 0);
 		}
 		throw new AssumptionFailedError("Switch should cover all wood types");
 	}
 
-	public static function getWoodenPressurePlateIdentifier(TreeType $treeType) : BlockIdentifier{
+	public static function getWoodenPressurePlateIdentifier(TreeType $treeType) : BID{
 		switch($treeType->id()){
 			case TreeType::OAK()->id():
-				return new BlockIdentifier(Ids::WOODEN_PRESSURE_PLATE, 0);
+				return new BID(Ids::WOODEN_PRESSURE_PLATE, 0);
 			case TreeType::SPRUCE()->id():
-				return new BlockIdentifier(Ids::SPRUCE_PRESSURE_PLATE, 0);
+				return new BID(Ids::SPRUCE_PRESSURE_PLATE, 0);
 			case TreeType::BIRCH()->id():
-				return new BlockIdentifier(Ids::BIRCH_PRESSURE_PLATE, 0);
+				return new BID(Ids::BIRCH_PRESSURE_PLATE, 0);
 			case TreeType::JUNGLE()->id():
-				return new BlockIdentifier(Ids::JUNGLE_PRESSURE_PLATE, 0);
+				return new BID(Ids::JUNGLE_PRESSURE_PLATE, 0);
 			case TreeType::ACACIA()->id():
-				return new BlockIdentifier(Ids::ACACIA_PRESSURE_PLATE, 0);
+				return new BID(Ids::ACACIA_PRESSURE_PLATE, 0);
 			case TreeType::DARK_OAK()->id():
-				return new BlockIdentifier(Ids::DARK_OAK_PRESSURE_PLATE, 0);
+				return new BID(Ids::DARK_OAK_PRESSURE_PLATE, 0);
 		}
 		throw new AssumptionFailedError("Switch should cover all wood types");
 	}
 
-	public static function getWoodenDoorIdentifier(TreeType $treeType) : BlockIdentifier{
+	public static function getWoodenDoorIdentifier(TreeType $treeType) : BID{
 		switch($treeType->id()){
 			case TreeType::OAK()->id():
 				return new BID(Ids::OAK_DOOR_BLOCK, 0, ItemIds::OAK_DOOR);
@@ -141,94 +141,94 @@ public static function getWoodenDoorIdentifier(TreeType $treeType) : BlockIdenti
 		throw new AssumptionFailedError("Switch should cover all wood types");
 	}
 
-	public static function getWoodenFenceIdentifier(TreeType $treeType) : BlockIdentifier{
+	public static function getWoodenFenceIdentifier(TreeType $treeType) : BID{
 		switch($treeType->id()){
 			case TreeType::OAK()->id():
-				return new BlockIdentifier(Ids::OAK_FENCE_GATE, 0);
+				return new BID(Ids::OAK_FENCE_GATE, 0);
 			case TreeType::SPRUCE()->id():
-				return new BlockIdentifier(Ids::SPRUCE_FENCE_GATE, 0);
+				return new BID(Ids::SPRUCE_FENCE_GATE, 0);
 			case TreeType::BIRCH()->id():
-				return new BlockIdentifier(Ids::BIRCH_FENCE_GATE, 0);
+				return new BID(Ids::BIRCH_FENCE_GATE, 0);
 			case TreeType::JUNGLE()->id():
-				return new BlockIdentifier(Ids::JUNGLE_FENCE_GATE, 0);
+				return new BID(Ids::JUNGLE_FENCE_GATE, 0);
 			case TreeType::ACACIA()->id():
-				return new BlockIdentifier(Ids::ACACIA_FENCE_GATE, 0);
+				return new BID(Ids::ACACIA_FENCE_GATE, 0);
 			case TreeType::DARK_OAK()->id():
-				return new BlockIdentifier(Ids::DARK_OAK_FENCE_GATE, 0);
+				return new BID(Ids::DARK_OAK_FENCE_GATE, 0);
 		}
 		throw new AssumptionFailedError("Switch should cover all wood types");
 	}
 
-	public static function getWoodenStairsIdentifier(TreeType $treeType) : BlockIdentifier{
+	public static function getWoodenStairsIdentifier(TreeType $treeType) : BID{
 		switch($treeType->id()){
 			case TreeType::OAK()->id():
-				return new BlockIdentifier(Ids::OAK_STAIRS, 0);
+				return new BID(Ids::OAK_STAIRS, 0);
 			case TreeType::SPRUCE()->id():
-				return new BlockIdentifier(Ids::SPRUCE_STAIRS, 0);
+				return new BID(Ids::SPRUCE_STAIRS, 0);
 			case TreeType::BIRCH()->id():
-				return new BlockIdentifier(Ids::BIRCH_STAIRS, 0);
+				return new BID(Ids::BIRCH_STAIRS, 0);
 			case TreeType::JUNGLE()->id():
-				return new BlockIdentifier(Ids::JUNGLE_STAIRS, 0);
+				return new BID(Ids::JUNGLE_STAIRS, 0);
 			case TreeType::ACACIA()->id():
-				return new BlockIdentifier(Ids::ACACIA_STAIRS, 0);
+				return new BID(Ids::ACACIA_STAIRS, 0);
 			case TreeType::DARK_OAK()->id():
-				return new BlockIdentifier(Ids::DARK_OAK_STAIRS, 0);
+				return new BID(Ids::DARK_OAK_STAIRS, 0);
 		}
 		throw new AssumptionFailedError("Switch should cover all wood types");
 	}
 
-	public static function getStrippedLogIdentifier(TreeType $treeType) : BlockIdentifier{
+	public static function getStrippedLogIdentifier(TreeType $treeType) : BID{
 		switch($treeType->id()){
 			case TreeType::OAK()->id():
-				return new BlockIdentifier(Ids::STRIPPED_OAK_LOG, 0);
+				return new BID(Ids::STRIPPED_OAK_LOG, 0);
 			case TreeType::SPRUCE()->id():
-				return new BlockIdentifier(Ids::STRIPPED_SPRUCE_LOG, 0);
+				return new BID(Ids::STRIPPED_SPRUCE_LOG, 0);
 			case TreeType::BIRCH()->id():
-				return new BlockIdentifier(Ids::STRIPPED_BIRCH_LOG, 0);
+				return new BID(Ids::STRIPPED_BIRCH_LOG, 0);
 			case TreeType::JUNGLE()->id():
-				return new BlockIdentifier(Ids::STRIPPED_JUNGLE_LOG, 0);
+				return new BID(Ids::STRIPPED_JUNGLE_LOG, 0);
 			case TreeType::ACACIA()->id():
-				return new BlockIdentifier(Ids::STRIPPED_ACACIA_LOG, 0);
+				return new BID(Ids::STRIPPED_ACACIA_LOG, 0);
 			case TreeType::DARK_OAK()->id():
-				return new BlockIdentifier(Ids::STRIPPED_DARK_OAK_LOG, 0);
+				return new BID(Ids::STRIPPED_DARK_OAK_LOG, 0);
 		}
 		throw new AssumptionFailedError("Switch should cover all wood types");
 	}
 
-	public static function getGlazedTerracottaIdentifier(DyeColor $color) : BlockIdentifier{
+	public static function getGlazedTerracottaIdentifier(DyeColor $color) : BID{
 		switch($color->id()){
 			case DyeColor::WHITE()->id():
-				return new BlockIdentifier(Ids::WHITE_GLAZED_TERRACOTTA, 0);
+				return new BID(Ids::WHITE_GLAZED_TERRACOTTA, 0);
 			case DyeColor::ORANGE()->id():
-				return new BlockIdentifier(Ids::ORANGE_GLAZED_TERRACOTTA, 0);
+				return new BID(Ids::ORANGE_GLAZED_TERRACOTTA, 0);
 			case DyeColor::MAGENTA()->id():
-				return new BlockIdentifier(Ids::MAGENTA_GLAZED_TERRACOTTA, 0);
+				return new BID(Ids::MAGENTA_GLAZED_TERRACOTTA, 0);
 			case DyeColor::LIGHT_BLUE()->id():
-				return new BlockIdentifier(Ids::LIGHT_BLUE_GLAZED_TERRACOTTA, 0);
+				return new BID(Ids::LIGHT_BLUE_GLAZED_TERRACOTTA, 0);
 			case DyeColor::YELLOW()->id():
-				return new BlockIdentifier(Ids::YELLOW_GLAZED_TERRACOTTA, 0);
+				return new BID(Ids::YELLOW_GLAZED_TERRACOTTA, 0);
 			case DyeColor::LIME()->id():
-				return new BlockIdentifier(Ids::LIME_GLAZED_TERRACOTTA, 0);
+				return new BID(Ids::LIME_GLAZED_TERRACOTTA, 0);
 			case DyeColor::PINK()->id():
-				return new BlockIdentifier(Ids::PINK_GLAZED_TERRACOTTA, 0);
+				return new BID(Ids::PINK_GLAZED_TERRACOTTA, 0);
 			case DyeColor::GRAY()->id():
-				return new BlockIdentifier(Ids::GRAY_GLAZED_TERRACOTTA, 0);
+				return new BID(Ids::GRAY_GLAZED_TERRACOTTA, 0);
 			case DyeColor::LIGHT_GRAY()->id():
-				return new BlockIdentifier(Ids::SILVER_GLAZED_TERRACOTTA, 0);
+				return new BID(Ids::SILVER_GLAZED_TERRACOTTA, 0);
 			case DyeColor::CYAN()->id():
-				return new BlockIdentifier(Ids::CYAN_GLAZED_TERRACOTTA, 0);
+				return new BID(Ids::CYAN_GLAZED_TERRACOTTA, 0);
 			case DyeColor::PURPLE()->id():
-				return new BlockIdentifier(Ids::PURPLE_GLAZED_TERRACOTTA, 0);
+				return new BID(Ids::PURPLE_GLAZED_TERRACOTTA, 0);
 			case DyeColor::BLUE()->id():
-				return new BlockIdentifier(Ids::BLUE_GLAZED_TERRACOTTA, 0);
+				return new BID(Ids::BLUE_GLAZED_TERRACOTTA, 0);
 			case DyeColor::BROWN()->id():
-				return new BlockIdentifier(Ids::BROWN_GLAZED_TERRACOTTA, 0);
+				return new BID(Ids::BROWN_GLAZED_TERRACOTTA, 0);
 			case DyeColor::GREEN()->id():
-				return new BlockIdentifier(Ids::GREEN_GLAZED_TERRACOTTA, 0);
+				return new BID(Ids::GREEN_GLAZED_TERRACOTTA, 0);
 			case DyeColor::RED()->id():
-				return new BlockIdentifier(Ids::RED_GLAZED_TERRACOTTA, 0);
+				return new BID(Ids::RED_GLAZED_TERRACOTTA, 0);
 			case DyeColor::BLACK()->id():
-				return new BlockIdentifier(Ids::BLACK_GLAZED_TERRACOTTA, 0);
+				return new BID(Ids::BLACK_GLAZED_TERRACOTTA, 0);
 		}
 		throw new AssumptionFailedError("Switch should cover all colours");
 	}
diff --git a/src/item/ItemFactory.php b/src/item/ItemFactory.php
index 4a949f843ea..f5495e65ea0 100644
--- a/src/item/ItemFactory.php
+++ b/src/item/ItemFactory.php
@@ -443,7 +443,7 @@ public function register(Item $item, bool $override = false) : void{
 		$this->list[self::getListOffset($id, $variant)] = clone $item;
 	}
 
-	public function remap(ItemIdentifier $identifier, Item $item, bool $override = false) : void{
+	public function remap(IID $identifier, Item $item, bool $override = false) : void{
 		if(!$override && $this->isRegistered($identifier->getId(), $identifier->getMeta())){
 			throw new \RuntimeException("Trying to overwrite an already registered item");
 		}
diff --git a/src/network/mcpe/ChunkRequestTask.php b/src/network/mcpe/ChunkRequestTask.php
index 7e5eea360ea..8a1de37d795 100644
--- a/src/network/mcpe/ChunkRequestTask.php
+++ b/src/network/mcpe/ChunkRequestTask.php
@@ -29,6 +29,7 @@
 use pocketmine\network\mcpe\protocol\LevelChunkPacket;
 use pocketmine\network\mcpe\protocol\serializer\PacketBatch;
 use pocketmine\network\mcpe\protocol\types\ChunkPosition;
+use pocketmine\network\mcpe\protocol\types\DimensionIds;
 use pocketmine\network\mcpe\serializer\ChunkSerializer;
 use pocketmine\scheduler\AsyncTask;
 use pocketmine\utils\BinaryStream;
diff --git a/src/network/mcpe/compression/Compressor.php b/src/network/mcpe/compression/Compressor.php
index 6c042c51d1e..015bdb688d1 100644
--- a/src/network/mcpe/compression/Compressor.php
+++ b/src/network/mcpe/compression/Compressor.php
@@ -23,6 +23,8 @@
 
 namespace pocketmine\network\mcpe\compression;
 
+use pocketmine\network\mcpe\protocol\types\CompressionAlgorithm;
+
 interface Compressor{
 	/**
 	 * @throws DecompressionException
@@ -35,7 +37,7 @@ public function compress(string $payload) : string;
 	 * Returns the canonical ID of this compressor, used to tell the remote end how to decompress a packet compressed
 	 * with this compressor.
 	 *
-	 * @return CompressionAlgorithm::*
+	 * @phpstan-return CompressionAlgorithm::*
 	 */
 	public function getNetworkId() : int;
 
diff --git a/src/network/mcpe/serializer/ChunkSerializer.php b/src/network/mcpe/serializer/ChunkSerializer.php
index 6863fd2e937..e52e97a557e 100644
--- a/src/network/mcpe/serializer/ChunkSerializer.php
+++ b/src/network/mcpe/serializer/ChunkSerializer.php
@@ -159,6 +159,9 @@ public static function serializeTiles(Chunk $chunk) : string{
 		return $stream->getBuffer();
 	}
 
+	/**
+	 * @phpstan-param DimensionIds::* $dimensionId
+	 */
 	private static function serializeBiomesAsPalette(Chunk $chunk, int $dimensionId) : string{
 		[$minSubChunkIndex, $maxSubChunkIndex] = self::getDimensionChunkBounds($dimensionId);
 		$biomeIdMap = LegacyBiomeIdToStringIdMap::getInstance();
diff --git a/src/utils/MainLogger.php b/src/utils/MainLogger.php
index 139388af724..b21cd9fd5b1 100644
--- a/src/utils/MainLogger.php
+++ b/src/utils/MainLogger.php
@@ -79,38 +79,38 @@ public function setFormat(string $format) : void{
 	}
 
 	public function emergency($message){
-		$this->send($message, \LogLevel::EMERGENCY, "EMERGENCY", TextFormat::RED);
+		$this->send($message, LogLevel::EMERGENCY, "EMERGENCY", TextFormat::RED);
 	}
 
 	public function alert($message){
-		$this->send($message, \LogLevel::ALERT, "ALERT", TextFormat::RED);
+		$this->send($message, LogLevel::ALERT, "ALERT", TextFormat::RED);
 	}
 
 	public function critical($message){
-		$this->send($message, \LogLevel::CRITICAL, "CRITICAL", TextFormat::RED);
+		$this->send($message, LogLevel::CRITICAL, "CRITICAL", TextFormat::RED);
 	}
 
 	public function error($message){
-		$this->send($message, \LogLevel::ERROR, "ERROR", TextFormat::DARK_RED);
+		$this->send($message, LogLevel::ERROR, "ERROR", TextFormat::DARK_RED);
 	}
 
 	public function warning($message){
-		$this->send($message, \LogLevel::WARNING, "WARNING", TextFormat::YELLOW);
+		$this->send($message, LogLevel::WARNING, "WARNING", TextFormat::YELLOW);
 	}
 
 	public function notice($message){
-		$this->send($message, \LogLevel::NOTICE, "NOTICE", TextFormat::AQUA);
+		$this->send($message, LogLevel::NOTICE, "NOTICE", TextFormat::AQUA);
 	}
 
 	public function info($message){
-		$this->send($message, \LogLevel::INFO, "INFO", TextFormat::WHITE);
+		$this->send($message, LogLevel::INFO, "INFO", TextFormat::WHITE);
 	}
 
 	public function debug($message, bool $force = false){
 		if(!$this->logDebug && !$force){
 			return;
 		}
-		$this->send($message, \LogLevel::DEBUG, "DEBUG", TextFormat::GRAY);
+		$this->send($message, LogLevel::DEBUG, "DEBUG", TextFormat::GRAY);
 	}
 
 	public function setLogDebug(bool $logDebug) : void{