Anti-Dupe

!(https://cdn.modrinth.com/data/cached_images/0d16b01708ea8ee836fa0eca3f9de8f8260da36f_0.webp) !(https://bstats.org/signatures/bukkit/anti-dupe.svg)

# Anti-Dupe 3. 3

Anti-Dupe is an advanced anti-duplication and inventory-integrity plugin for Paper Minecraft servers.

It combines transaction tracking, UUID protection, inventory scanning, recovery backups, trusted-plugin compatibility, cross-inventory verification, and server security controls while trying to preserve normal vanilla gameplay.

## Features

• Transaction ledger and item accounting
• Unique-item UUID tracking
• Stack-safe duplicate detection
• Cross-inventory scanning
• Deep scans and automatic chunk scans
• Trusted shop/plugin compatibility
• Crafting and workstation protection
• Bundle-aware item accounting
• Plugin-managed vault protection
• Custom transfer command monitoring
• Inventory rollback snapshots
• Safe duplicate recovery
• Discord webhook alerts
• Daily rotating logs
• Configurable console verbosity
• SQLite / MySQL / MariaDB / PostgreSQL support
• Velocity / Bungee network support
• World-specific rules
• Exploit fingerprint detection
• OP protection
• Creative Mode protection
• 28 supported locale variants
• bStats support

# Trusted Plugins

Anti-Dupe can recognize legitimate item transactions from explicitly trusted plugins.

A trusted custom inventory must match both:

1. An approved inventory title. 2. A plugin listed under `trusted-plugins`.

```yaml compatibility: external-plugin-inventories: enabled: true grace-delay-ticks: 4

trusted-plugins: - UltimateShop

title-patterns: - shop - store - market ```

> ⚠️ Trusted Plugin Warning > > A trusted plugin becomes part of Anti-Dupe's trust boundary. > > If that plugin contains an item duplication or transaction bug, Anti-Dupe may treat the resulting items as legitimate. > > Only whitelist plugins you trust and keep the list as small as possible.

# Vanilla Transaction Protection

Anti-Dupe has dedicated handling for common vanilla item systems, including:

• Player crafting
• Crafting Tables
• Anvils
• Grindstones
• Smithing Tables
• Stonecutters
• Cartography Tables
• Looms
• Villager Trading
• Furnaces
• Blast Furnaces
• Smokers
• Brewing Stands
• Crafters
• Bundles

This helps distinguish legitimate item transformations from actual item creation.

# Bundle Protection

Items inside vanilla bundles are included in Anti-Dupe's inventory accounting.

Moving arrows from:

```text Bundle → Cursor → Inventory ```

does not count as new item creation.

```yaml transaction-handlers: bundles: enabled: true delay-ticks: 2 include-contained-items-in-accounting: true recursive-content-check: true ```

Real bundle duplication that increases the combined quantity can still be detected.

# Cross-Inventory Protection

Anti-Dupe can compare unique items across:

• Player inventories
• Ender Chests
• Chests
• Barrels
• Shulker Boxes
• Hoppers
• Furnaces
• Minecarts
• Other loaded inventories

High-speed movement protection helps prevent stale container observations during:

• Elytra travel
• Nether travel
• Portals
• Teleports
• World changes
• Fast chunk loading

Suspicious cross-inventory duplicates can require a second live confirmation before quarantine.

# Safe Recovery

Before removing a confirmed duplicate, Anti-Dupe backs up the complete ItemStack.

```text plugins/Anti-Dupe/recovery.yml ```

```text /antidupe recovery list /antidupe recovery player /antidupe recovery restore /antidupe recovery restore ```

If the backup fails, the item is not removed.

# Inventory Rollbacks

Anti-Dupe can also save complete inventory snapshots.

```text /antidupe rollback list /antidupe rollback snapshot /antidupe rollback restore ```

# Security Guards

Anti-Dupe can optionally restrict OP and Creative Mode access by UUID.

```yaml security: enabled: false

op-protection: enabled: true allowed-uuids: []

creative-protection: enabled: true allowed-uuids: [] fallback-gamemode: SURVIVAL ```

Manage them in-game:

```text /antidupe opprot add /antidupe opprot remove /antidupe opprot list

/antidupe creativeprot add /antidupe creativeprot remove /antidupe creativeprot list ```

> ⚠️ Add your administrator UUIDs before enabling security. > > An enabled OP whitelist with no UUIDs means nobody is authorized to remain OP.

Default scan schedule:

| Scan | Default | |------|--------:| | Player Inventories | 5 min | | Ender Chests | 10 min | | Loaded Containers | 15 min | | UUID Cross-Check | 15 min | | Ledger Audit | 30 min |

Manual scans:

```text /antidupe scan all /antidupe scan players /antidupe scan ender /antidupe scan containers /antidupe scan chunk ```

# Discord & Logging

Anti-Dupe supports:

• Discord webhook alerts
• Daily rotating log