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Anti-duperz

Anti-duperz

Stops exploiters on your Minecraft SMP from doing any sort of dupe this includes paper dupe.

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243
5

Compatibility

Minecraft: Java Edition

1.21.11
1.21.4โ€“1.21.5
1.21

Platforms

Tags

Creators

Details

Licensed ARR
Published 11 months ago

Anti-Dupe

Compatibility: Bukkit / Spigot / Paper / Purpur (1.21.11)

Key Features

Advanced Item Duplication Prevention (For un-stackable items)

  • Uses a hybrid system of deterministic hashes and per-item unique IDs to safely detect duplicated items without false positives. Lineage-Aware Serialization (For stackable items)

  • Players can now combine similar stackable items even when items carry different lineage / NBT data.

  • Lineage serial ranges are merged correctly

  • No data is lost -Inventory consolidation behaves like vanilla Minecraft

Inventory & Cross-Inventory Scanning

  • Detects duplicate items within a playerโ€™s inventory and across all online players.

  • Keeps legitimate copies and removes only excess items. Custom Item Rules (Name-Based)

  • Track custom items by display name, not NBT or material, preventing renamed items from bypassing detection.

Per-Item Hash Modes

  • NAME โ€“ stackable items share a deterministic hash (ideal for currencies like Money Sachets)
  • UNIQUE โ€“ non-stackable or special items get a unique ID per item

Custom Stack Sizes (Per Item)

  • Define allowed stack sizes for both vanilla and custom items via commands or config. Always-Scanned Custom Items

  • Custom items are always checked, even when onlyscan mode or material exclusions are enabled.

  • Multi-Language Support

Added in game language support for the following.

de_DE
en_US
es_ES
fr_CA
fr_FR
it_IT
ja_JP
pl_PL
pt_BR
ru_RU
tr_TR
uk_UA
zh_CN

Safe Removal & Recovery System

  • Excess duplicate items are backed up to recovery.yml instead of being deleted.

Multi-Language Discord Webhook Alerts (Embed Messages)

  • Sends rich embed notifications in multiple languages to a Discord channel when a duplication is detected.

Admin Whitelist

  • Exempt trusted players from all anti-dupe checks. OnlyScan Mode

  • Scan only high-value items for performance, while still protecting all custom items. Automatic Ban Option

  • Optionally bans players caught duplicating, with full logging. Hot Reload Support

  • Reload custom item rules, stack sizes, hash modes, language files, and Discord config without restarting the server. Detailed Logging

  • Duplication attempts logged in dupe_log.yml, bans recorded in bans.yml.