# Get Started

{% hint style="warning" %}
You will need an API Key to get started. Get your key by signing up on the [Developer Portal](https://developer-test.usemeta.fi/).
{% endhint %}

## Description

The Metafi JS SDK offers you the option to completely white-label and customise the UI of the wallet experience for your users. Please refer to the steps below to begin integration , and additionally, please post any other questions on our [Discord](https://discord.gg/yaxvxEmuKn) channel.

To view a sample integration, please refer to our [demo application](https://codesandbox.io/s/metafi-js-demo-qiqp8w?file=/src/App.js).

## Step 1: Install the library

First, install the library via your terminal.

<pre class="language-shell" data-line-numbers><code class="lang-shell"><strong># install via Yarn
</strong>yarn add @metafi/metafi-js-package

# or via NPM
npm install @metafi/metafi-js-package
</code></pre>

## Step 2: Setup User Login

Go to your project page in the [Developer Portal](https://developer-test.usemeta.fi/merchant/projects) and navigate to Settings. There you can update the URL which we will use to authenticate your user token. Once this URL is updated, you can create a wallet for a user by passing in their `userIdentifier` and `jwtToken` into our SDK.

More information on this can be found in the [Login](/js-sdk/sdk-reference/login.md) section of our documentation.

```jsx
import { Login } from '@metafi/metafi-js-package';
import { getLoginToken } from './controllers/login'

function App() {

    const handleLogin = async () => {
        var email = "test@mail.com";
        var jwtToken = getLoginToken(email);  // your logic to login user
        
        var result = await Login(
            email,
            jwtToken,
            "YOUR-API-KEY",
            "YOUR-SECRET-KEY"
        );
        
        console.log("Login results", result);
    }
    
    return (
        <div>
	    <button onClick={handleLogin}>Handle login</button>
        </div>
    );
}

export default App;

```

## Step 3: Function Invocation

You're done! You can now invoke the functions that you need.

<pre class="language-jsx" data-line-numbers><code class="lang-jsx"><strong>import stakeContractAbi from './contracts/abi/stakeContract.json'
</strong><strong>import {
</strong>    CallGenericWriteFunction,
    ConvertNumberToBigNumber,
    chains
} from '@metafi/metafi-js-package';

function App() {
    const stakeTokens = () => {
        CallGenericWriteFunction({
                chain: chains.eth,             
                contractAddress: "0xF5C9F957705bea56a7e806943f98F7877B995826",   
                functionABI: stakeContractAbi.abi,   
                functionName: "stake",
                value: ConvertNumberToBigNumber(1, 18),
                params: [],
                callback: (res) => {
                    console.log(res);
                }
            },
            "YOUR-API-KEY"
        );
    }
    
    return (
        &#x3C;div>
	    &#x3C;button onClick={stakeTokens}>stakeTokens&#x3C;/button>
        &#x3C;/div>
    );
}

export default App;

</code></pre>


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.usemeta.fi/js-sdk/get-started.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.