there's always one ...

src/block/utils/CopperTrait.php

@@ -0,0 +1,62 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+ * @link http://www.pocketmine.net/
+ *
+ *
+ */
+
+declare(strict_types=1);
+
+namespace pocketmine\block\utils;
+
+use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataWriter;
+use pocketmine\data\runtime\RuntimeEnumDeserializer;
+use pocketmine\data\runtime\RuntimeEnumSerializer;
+
+trait CopperTrait{
+	private CopperOxidation $oxidation;
+	private bool $waxed;
+
+	public function getRequiredTypeDataBits() : int{ return 3; }
+
+	protected function decodeType(RuntimeDataReader $r) : void{
+		$this->oxidation = RuntimeEnumDeserializer::readCopperOxidation($r);
+		$this->waxed = $r->readBool();
+	}
+
+	protected function encodeType(RuntimeDataWriter $w) : void{
+		RuntimeEnumSerializer::writeCopperOxidation($w, $this->oxidation);
+		$w->writeBool($this->waxed);
+	}
+
+	public function getOxidation() : CopperOxidation{ return $this->oxidation; }
+
+	/** @return $this */
+	public function setOxidation(CopperOxidation $oxidation) : self{
+		$this->oxidation = $oxidation;
+		return $this;
+	}
+
+	public function isWaxed() : bool{ return $this->waxed; }
+
+	/** @return $this */
+	public function setWaxed(bool $waxed) : self{
+		$this->waxed = $waxed;
+		return $this;
+	}
+}