Can items be duplicated through trades?

No. Every trade uses atomic swaps with full rollback on failure. Ownership is validated before execution.

Does it include a UI?

No. The engine handles data and logic. You build the UI to match your game style and wire it to the provided RemoteEvents.

Can I disable trading for certain items?

Yes. Each item in the registry has a trade eligibility flag. Set it to false to make items untradeable.

How are disputes handled?

Every trade is logged to DataStore with timestamps, participants, and items. You can query the audit log for dispute resolution.

What happens after I purchase?

You get instant access to the full source code via your customer dashboard. Download it, drop it into Studio, and start building.

What is the difference between Personal and Studio?

Personal covers a single developer using the system in one experience. Studio allows your entire team to use it across multiple experiences with priority support.

Are future updates included?

Yes. Your license includes every future update at no extra cost. New versions appear in your dashboard as soon as they release.

How does the download work?

After purchase, log into your dashboard at LuaSystems.com. Each licensed system has a download button that gives you the latest release as a .rbxm or .lua file.

Economy, Gameplay

Items and trading that players trust and exploiters can not break.

Server-authoritative inventory management and peer-to-peer trading with rollback safety.

One-time purchase · No subscription

Full source codeProduction-readyAll future updatesInstant download

Preview

See it in action

Proximity trade UI with item offers, confirm and cancel buttons, and live activity log

Walk up to another player and trade — tap items to offer, confirm when ready, with full activity logging on both sides.

Inventory demo panel with rarity-sorted items, grant buttons, and trading controls

Rarity-sorted inventory display with grant shortcuts, trading controls, and a live activity log — everything wired for instant testing.

Features

What you get

Server-authoritative inventory with zero client trust
Item registry with rarity tiers, stacking rules, and trade eligibility flags
Configurable inventory capacity with automatic slot management
Peer-to-peer trading with dual confirmation flow
Atomic item swap with full rollback on failure
Ownership validation before every trade execution

Trade cooldowns and timeout expiration
Trade audit logging to DataStore for dispute resolution
Admin tools: grant, revoke, inspect, and wipe inventories
Autosave and shutdown-safe persistence
Studio helper tools for inventory dumps and trade log exports

Stop rebuilding what Inventory & Trading Engine already solves.

Production-ready source code, clean integration, and every future update included — so you ship your game, not your infrastructure.

From $24.99 · one-time

Use Cases

Built for these workflows

RPG Loot Systems

Manage weapons, armor, and consumables with rarity tiers and stacking rules.

Trading Games

Secure peer-to-peer trading with dual confirmation and atomic rollback.

Pet Collect Games

Track pet inventories with capacity limits and trade eligibility flags.

Admin Item Grants

Grant, revoke, and inspect inventories from staff tools during live ops.

Pricing

One price. Yours forever.

Pay once, get full source code and every future update. No subscriptions, no per-seat fees, no recurring charges.

Personal

$24.99

One-time payment — yours forever

For individual developers and solo projects.

Full source code access
Use in one Roblox experience
Modify source for your project
Deploy to live production
All future updates included
Installation & bug-fix support

Best Value

Studio

$44.98

One-time payment — yours forever

For teams and commercial game studios.

Full source code access
Use across multiple experiences
Share with your development team
Commercial-scale deployment
Internal forks for studio use
All future updates included
Priority support response

Use across your entire studio

Secure Stripe checkoutInstant download accessProduction-ready code

Compare tiers

Personal vs Studio

Feature	Personal	Studio
Source code access
Production deployment
All future updates
Experiences allowed	1	Unlimited
Team sharing	—
Internal forks	—
Commercial use	Solo only	Full commercial
Support tier	Standard	Priority

Technical

Integration details

Installation

Up and running in minutes.

1Place the InventoryTradingEngine folder into ServerScriptService.
2Edit Config.lua with your game settings (capacity, stacking, trade rules).
3Register your items in ServerMain.server.lua using ItemRegistry.RegisterBatch().
4The system auto-initializes and creates RemoteEvents for client communication.
5Optional: connect to Easy Economy System for currency-based purchases.

API Surface

Inventory.Init()
Inventory.Add(player, itemId, quantity)
Inventory.Remove(player, itemId, quantity)
Inventory.GetAll(player)
Inventory.Has(player, itemId, quantity)
Trading.Init()
Trading.Request(initiator, receiver)
Trading.Offer(player, itemId, quantity)
Trading.Confirm(player)
Trading.Cancel(player)
AdminTools.Grant(admin, target, itemId, qty)
AdminTools.Inspect(admin, target)

Requirements

Roblox Studio: Latest recommended
LuaU: Required
Dependencies: None (Easy Economy System recommended for currency integration)
Compatibility: Works with any UI framework
Compatibility: Pairs with Sentinel Anti-Exploit for security monitoring
Compatibility: Studio and production ready

Licensing

Permitted for use in personal and commercial Roblox games. Source code may be modified for internal use. Redistribution or resale of the source is not permitted.

View full licensing terms →

Full source code. Documented APIs. No black boxes.

Inventory & Trading Engine ships with clean architecture, typed APIs, and step-by-step installation — so you can inspect, modify, and trust exactly what you are deploying.

Updates

Actively maintained

Available

Latest: 1.1.0Released 2026-04-07

Your license includes this release and every future update at no extra cost.

1.1.0Latest2026-04-07

Added: Proximity-based trading with spatial trigger support
Added: Interactive demo panel for testing all inventory and trade paths
Added: Script types and folder structure documentation in readme
Fixed: DataStore crash in unpublished Studio places (graceful fallback)

1.0.02026-04-01

Added: Server-authoritative inventory with stacking and capacity limits
Added: Item registry with rarity, stacking, and trade eligibility
Added: Peer-to-peer trading with dual confirmation and atomic rollback
Added: Trade audit logging and timeout expiration
Added: Admin tools for grant, revoke, inspect, and wipe operations
Added: Studio helper tools for inventory dumps and trade log exports

FAQ

Common questions

Get Inventory & Trading Engine today.

One purchase. Full source. Instant download. Every future update included at no extra cost.

Secure Stripe checkout · License delivered instantly · No recurring fees