DupeTrace

Professional Item Duplication Detection & Prevention

Protect your server's economy and integrity with fast & reliable enterprise-grade duplicate detection.

Best Anti-Dupe that can easily trace back how the exploit works

Check out the VERY detailed WIKI pages

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Why Choose DupeTrace?

Item duplication exploits are the #1 threat to server economies. A single dupe glitch can: - Destroy months of careful server balancing - Make legitimate players quit in frustration - Crash your economy overnight - Force rollbacks that punish innocent players

DupeTrace stops dupes BEFORE they spread by: - ✅ Tracking every non-stackable item with invisible UUID fingerprints - ✅ Detecting when the same item appears in multiple locations simultaneously - ✅ Auto-removing duplicates in real-time (configurable) - ✅ Logging complete forensic histories for investigations - ✅ Working passively without breaking other plugins or game mechanics

200-1000 events/second DupeTrace uses asynchronous database operations, connection pooling, and smart caching to handle 200-1000 events/second without impacting your server TPS. (equal to 10-50 players actively spamming non-stackable item events. you're fine)

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Key Features

- 🔍 Zero-Lag Design: Tracks all non-stackable items with unique IDs stored in NBT data - 🗃️ Zero-Lag Design: Enterprise-grade persistence handles millions of records without slowdown - ⚡ Zero-Lag Design: Comprehensive event tracking across 30+ Bukkit events - 🛡️ Zero-Lag Design: Optional automatic removal of duplicated items (keeps the oldest legitimate copy) - 📣 Zero-Lag Design: Send duplicate alerts to your Discord server with formatted embeds - 🎨 Zero-Lag Design: Configurable handling of Creative mode duplication - 📊 Zero-Lag Design: Recursively tracks items inside Shulker Boxes and Bundles - 🔧 Zero-Lag Design: Fine-tune detection sensitivity, grace periods, and performance settings - 🔬 Zero-Lag Design: Complete transfer history and player-based item searches for investigations - 🚀 Zero-Lag Design: All database operations run asynchronously on separate threads

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Performance Metrics

Database Growth - Database Growth: ~25-35 MB total (plugin + connection pool + cache) - Database Growth: < 1% on modern hardware - Database Growth: None (all database operations are async) - Database Growth: Handles 200-1000 item events/second without lag - Database Growth: ~150-200 MB per million transfers (~1-2 GB/month on active servers)

500+ concurrent players - Tested for servers with 500+ concurrent players - Connection pooling handles concurrent database access efficiently - Smart in-memory caching reduces database queries - Configurable TTL prevents memory leaks on long-running servers

Configuration (required!)

1. After first start, edit the generated `plugins/DupeTrace/config.yml` 2. Add your PostgreSQL details 3. Restart the server

Commands

| command | description | | --- | --- | | `/dupetest give` | Give yourself a Diamond Sword tagged with a unique ID | | `/dupetest uuid <uuid>` | View item's recent transfer history (latest 10 entries) | | `/dupetest history <uuid> [limit]` | View full transfer log (default limit: 50) | | `/dupetest stats` | View plugin and database statistics | | `/dupetest search <player>` | List tracked items associated with a player |

Command aliases: `/dt` & `/dtrace`

Large Servers

(Recommended for 100+ players)

```yaml scan-interval: 300 # Increase to 15 seconds inventory-open-scan-enabled: false # Disable for max performance database: postgres: pool-size: 20 # Increase pool size known-items-ttl-ms: 300000 # Reduce to 5 minutes ```

Permissions

| permissions | description | default | | --- | --- | --- | | dupetrace.admin | Allows access to DupeTrace admin commands | op | | dupetrace.alerts | Receive duplicate alerts from DupeTrace | op |

Dependencies

A (remote) PostgreSQL Database is required!

Dependencies (included)

- `kotlin-stdlib-jdk8` - Kotlin standard library - `HikariCP 5.1.0` - Database connection pooling - `PostgreSQL 42.7.4` - PostgreSQL JDBC driver - `adventure MiniMessage 4.25.0` - Minecraft Java UI Library

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In Active and Continues development. Check out the VERY detailed WIKI pages

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