> ## Documentation Index
> Fetch the complete documentation index at: https://docs.larksh.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Unity SDK

> Use the Firebase Unity SDK with Lark

Point your Firebase Unity SDK at Lark by passing your Lark URL to `FirebaseDatabase.GetInstance()`. Everything else (listeners, writes, transactions) works without changes.

## Setup

Add the Firebase Realtime Database package to your Unity project:

1. Download the [Firebase Unity SDK](https://firebase.google.com/download/unity)
2. Import `FirebaseDatabase.unitypackage` via **Assets > Import Package > Custom Package**
3. Add your `google-services.json` (Android) or `GoogleService-Info.plist` (iOS) to the project

## Connect to Lark

Pass your Lark URL when getting the database instance:

```csharp theme={null}
using Firebase.Database;

// Change this from https://PROJECT_ID.firebaseio.com
FirebaseDatabase database =
    FirebaseDatabase.GetInstance("https://your-lark-project-id.larkdb.net");

DatabaseReference myRef = database.GetReference("players/alice");
```

If your config file already has the database URL, you can update it there instead and use `FirebaseDatabase.DefaultInstance` directly.

## Database routing

If your Firebase app stores many independent data silos under path prefixes (game rooms, workspaces, etc.), see [Database routing](/firebase/database-routing) for options on splitting them into separate Lark databases.