Block Signing Plugin (Anti-Dupe) - Item Duplication Protection

This plugin implements an effective system for preventing duplication of valuable items in Minecraft. It assigns unique MD5 checksums to all important inventory items to detect and eliminate duplicates.

The system covers a wide range of protected items:

BOW BROWN_SHULKER_BOX BUNDLE CHAINMAIL_BOOTS CHAINMAIL_CHESTPLATE CHAINMAIL_HELMET CHAINMAIL_LEGGINGS CHEST_MINECART COMMAND_BLOCK_MINECART CROSSBOW CYAN_SHULKER_BOX DEBUG_STICK DIAMOND_AXE DIAMOND_BOOTS DIAMOND_CHESTPLATE DIAMOND_HELMET DIAMOND_HOE DIAMOND_LEGGINGS DIAMOND_PICKAXE DIAMOND_SHOVEL DIAMOND_SWORD ELYTRA ENCHANTED_BOOK FISHING_ROD FLINT_AND_STEEL FURNACE_MINECART GOLDEN_AXE GOLDEN_HOE GOLDEN_PICKAXE GOLDEN_SHOVEL GOLDEN_SWORD GRAY_SHULKER_BOX GREEN_SHULKER_BOX HOPPER_MINECART IRON_AXE IRON_BOOTS IRON_CHESTPLATE IRON_HELMET IRON_HOE IRON_LEGGINGS IRON_PICKAXE IRON_SHOVEL IRON_SWORD LINGERING_POTION LIGHT_BLUE_SHULKER_BOX LIGHT_GRAY_SHULKER_BOX LIME_SHULKER_BOX MAGENTA_SHULKER_BOX MINECART NETHERITE_AXE NETHERITE_BOOTS NETHERITE_CHESTPLATE NETHERITE_HELMET NETHERITE_HOE NETHERITE_LEGGINGS NETHERITE_PICKAXE NETHERITE_SHOVEL NETHERITE_SWORD ORANGE_SHULKER_BOX PINK_SHULKER_BOX POTION PURPLE_SHULKER_BOX RED_SHULKER_BOX SHULKER_BOX SPLASH_POTION SPYGLASS STONE_AXE STONE_HOE STONE_PICKAXE STONE_SHOVEL STONE_SWORD TOTEM_OF_UNDYING TRIDENT TURTLE_HELMET WHITE_SHULKER_BOX WOODEN_AXE WOODEN_HOE WOODEN_PICKAXE WOODEN_SHOVEL WOODEN_SWORD YELLOW_SHULKER_BOX

When duplicate checksums are detected, the system automatically removes suspicious items from the player's inventory. The server log records information about the found duplicate MD5 signature and the performed inventory cleanup.

This plugin effectively blocks both existing and potential duplication vulnerabilities caused by either the game itself or other modifications.

Video demonstration - https://youtu.be/VHfCEHdDdYI