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

# Installation And Setup

## Installation

<PlatformTabs groupId="sdk" activeOptions={["web","flutter"]}>
  <PlatformTabItem value="web">
    ```bash npm2yarn theme={null}
    npm install @fuseio/fusebox-web-sdk
    ```
  </PlatformTabItem>

  <PlatformTabItem value="flutter">
    Install the FuseSDK using Dart or flutter.

    ```dart theme={null}
    dart pub add fuse_wallet_sdk
    ```

    ```dart theme={null}
    flutter pub add fuse_wallet_sdk
    ```
  </PlatformTabItem>
</PlatformTabs>

Once you have installed the package, you can import it into your code:

<PlatformTabs groupId="sdk" activeOptions={["web","flutter"]}>
  <PlatformTabItem value="web">
    ```typescript theme={null}
    import {FuseSDK} from "@fuseio/fusebox-web-sdk";
    ```
  </PlatformTabItem>

  <PlatformTabItem value="flutter">
    ```dart theme={null}
    import 'package:fuse_wallet_sdk/fuse_wallet_sdk.dart';
    ```
  </PlatformTabItem>
</PlatformTabs>

### Usage

To use the SDK in your project, you must create an instance of the **`FuseSDK`** class. This class is the key to interacting with the Fuse API using the SDK. Fortunately, the `FuseSDK` class provides a range of instance methods, allowing you to execute various operations with the API.

Whether you aim to fetch or create a smart wallet, relay an ERC20/FUSE transfer, relay an ERC721 transfer, relay a generic transaction, swap tokens, or stake tokens, the `FuseSDK` class has you covered. Additionally, the SDK provides data features that allow you to get the list of tokens owned by an address, get token details, and get a smart wallet's token balance.

The following code initializes the Fuse SDK and creates an instance of the `FuseSDK` class. The `apiKey` variable should be set to your own API key.

<PlatformTabs groupId="sdk" activeOptions={["web","flutter"]}>
  <PlatformTabItem value="web">
    ```typescript theme={null}
    import {ethers} from "ethers";
    import {FuseSDK} from "@fuseio/fusebox-web-sdk";

    const apiKey = "API_KEY";
    const credentials = new ethers.Wallet("PRIVATE_KEY");
    const fuseSDK = await FuseSDK.init(apiKey, credentials);
    ```
  </PlatformTabItem>

  <PlatformTabItem value="flutter">
    ```dart theme={null}
    import 'package:fuse_wallet_sdk/fuse_wallet_sdk.dart';

    final apiKey = 'API_KEY';
    final privateKey = EthPrivateKey.fromHex('YOUR_PRIVATE_KEY');
    final fuseSDK = await FuseSDK.init(apiKey, privateKey);
    ```
  </PlatformTabItem>
</PlatformTabs>

Once you have created an instance of the `FuseSDK` class, you can use its instance methods to interact with the Fuse API. In the following section, we will cover the available methods of the SDK.