Lua Library

Examples

Lua Roblox Shop

Building an In-Game Shop

Lua Roblox shop uses MarketplaceService for purchases.

Introduction to MarketplaceService

The MarketplaceService is a core service in Roblox that allows developers to handle in-game purchases. It provides the functionality needed to sell and buy items such as developer products, game passes, and other in-game assets. Understanding how to use MarketplaceService effectively is crucial for developers looking to monetize their games or offer premium content.

Setting Up the MarketplaceService

Before you can start using the MarketplaceService, you need to ensure that your game has items set up for purchase. These include developer products or game passes, which you can create and manage in the Roblox Developer Portal.

To access the MarketplaceService in your script, simply use:

Handling Purchases

Handling purchases in Roblox requires listening for purchase requests and responding appropriately. This is done using the ProcessReceipt callback function. This function is called whenever a player completes a purchase.

Here's an example of setting up a basic purchase handler:

Testing Purchases in Studio

It's important to test your purchasing logic in Roblox Studio before going live. You can simulate purchases to ensure that your ProcessReceipt function works correctly. Remember to check for edge cases, like repeat purchases and error handling.

Use the Developer Console in Studio to debug and ensure everything is functioning as expected.

Common Issues and Troubleshooting

While implementing the MarketplaceService, you may encounter some common issues such as purchases not processing or incorrect handling of receipt information. Here are a few tips to troubleshoot:

  • Ensure that the ProcessReceipt function returns PurchaseGranted when the purchase is successful.
  • Check that the ProductId and PlayerId are correctly used.
  • Use print statements to debug the flow and identify where issues might be arising.

Examples