> ## Documentation Index
> Fetch the complete documentation index at: https://docs.gx402.org/llms.txt
> Use this file to discover all available pages before exploring further.

# Core Functions API

> API reference for Gx402 SDK core functionality

## Core Functions API

The core functions of the Gx402 SDK provide the essential x402 functionality for games, focusing on seamless payment processing and multi-chain integration.

## initialize()

Initialize the Gx402 SDK with configuration options. This sets up the necessary infrastructure for x402 payment processing and multi-chain support.

### JavaScript/WebGL

```javascript theme={null}
const Gx402 = new Gx402SDK({
  apiKey: 'your-api-key',
  environment: 'production', // or 'development'
  enableRealtimeSync: true,
  debug: false
});

await Gx402.init();
```

#### Configuration Options

* `apiKey` (string, required): Your Gx402 API key
* `environment` (string): 'production' or 'development' (default: 'production')
* `enableRealtimeSync` (boolean): Enable real-time synchronization (default: false)
* `debug` (boolean): Enable debug logging (default: false)

### Unity (C#)

```csharp theme={null}
Gx402Manager.Initialize("your-api-key");

Gx402Manager.Configure(new Gx402Config {
    EnableRealtimeSync = true,
    LogLevel = Gx402LogLevel.Debug
});
```

### Unreal Engine (C++)

```cpp theme={null}
FGx402Config Config;
Config.ApiKey = TEXT("your-api-key");
Config.bEnableRealtimeSync = true;
Config.LogLevel = EGx402LogLevel::Debug;

UGx402Manager::Initialize(Config);
```

## processX402Data()

Process game data with x402 functionality. This function leverages the built-in x402 facilitator infrastructure to handle micropayments and other x402 protocol interactions.

### JavaScript

```javascript theme={null}
const result = await Gx402.processX402Data({
  data: gameData,
  options: {
    feature: 'advanced-gaming',
    sync: true,
    encrypt: true
  }
});
```

#### Parameters

* `params` (Object): Processing parameters
  * `data` (any): Game data to process
  * `options` (Object, optional): Processing options
    * `feature` (string): Specific x402 feature to use
    * `sync` (boolean): Whether to sync the result
    * `encrypt` (boolean): Whether to encrypt the data

#### Returns

* `Promise<any>`: Processed data with x402 enhancements

### Unity (C#)

```csharp theme={null}
var x402Result = Gx402Manager.ProcessX402Data(gameData);
```

#### Parameters

* `object gameData`: Game data to process with x402

#### Returns

* `object`: Processed data with x402 enhancements

### Unreal Engine (C++)

```cpp theme={null}
FGx402Result Result = UGx402Manager::ProcessX402Data(GameData);
```

## Multi-chain Support

The Gx402 SDK is designed with multi-chain support, accommodating both EVM (Ethereum Virtual Machine) and non-EVM blockchains. This ensures flexibility and broad compatibility for your game's payment infrastructure.

## Built-in x402 Facilitator Infrastructure

The SDK includes a built-in x402 facilitator infrastructure that handles the complexities of the x402 payment protocol. This allows developers to integrate micropayments without needing deep blockchain knowledge.