# Incremental Authorization (React)

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**Live Demo**

View the end-result of this tutorial at live at <https://incremental-auth-demo.picketapi.com/>
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### What is Incremental Authorization?

The best example of incremental authorization is a Web3 community site. Imagine every NFT has an exclusive community site. Only token holders can access their NFTs' respective communities and content. With an infinite number of possible NFT-based communities, it would be impossible to check if a user has access to every community on the site at once; instead, we want to verify a user's token ownership incrementally.

You can read more about in the [Incremental Authorization Concepts](https://docs.picketapi.com/picket-docs/reference/concepts/incremental-authorization) documentation.

### Getting Started

#### 1. Clone the Repo

```bash
git clone https://github.com/picketapi/picket-example-incremental-auth.git
cd picket-example-incremental-auth
```

#### 2. Install Dependencies

From the root directory, run

```bash
npm i
```

#### 3. Add Your Picket API Key

If you don't know about Picket API keys, checkout the the [Setup Guide](https://docs.picketapi.com/picket-docs/quick-start-guides/quick-start-guides/start-here-setup)

{% content-ref url="../quick-start-guides/quick-start-guides/start-here-setup" %}
[start-here-setup](https://docs.picketapi.com/picket-docs/quick-start-guides/quick-start-guides/start-here-setup)
{% endcontent-ref %}

1. Navigate to the [projects section of your Picket account](https://picketapi.com/dashboard#projects).
2. Copy the **Publishable Key** from on of your projects
3. Create a local `.env` file with your API key by running

```bash
echo "NEXT_PUBLIC_PICKET_PUBLISHABLE_KEY=YOUR_PUBLISHABLE_KEY_GOES_HERE" >> .env
```

#### 4. Run the Development Server

```bash
npm run dev
```

#### 5. View the App

Open [http://localhost:3000](http://localhost:3000/) with your browser to see the result.

#### 6. Modifying the App

You can start editing the page by modifying `pages/index.tsx`. The page auto-updates as you edit the file. Feel free to modify the app as much as you like to learn about Picket.

One idea for how to change the app is to add a token that you have access to!

**Modifying the Demo Tokens**

For the demo, we picked three popular Ethereum mainnet tokens: ENS, Doodles, and BYAC. You'll find these tokens defined at the top of `pages/index.tsx`.

Let's say we want to remove BYAC in favor of the [Okay Zombie Bears Club](https://opensea.io/collection/okay-zombie-bears-club). We can do this by modifying the `tokens` variable in `pages/index.tsx`

```typescript
const tokens = [
  {
    name: "ENS",
    image: "/ens.svg",
    description:
      "Ethereum Name Service is decentralised naming for wallets, websites, & more",
    contractAddress: "0x57f1887a8bf19b14fc0df6fd9b2acc9af147ea85",
  },
  {
    name: "Doodles",
    image: "/doodles.webp",
    description:
      "Doodles is a community-driven collectibles project featuring art by Burnt Toast",
    contractAddress: "0x8a90cab2b38dba80c64b7734e58ee1db38b8992e",
  },
  // Replace BYAC with Okay Zombie Bears Club
  {
    name: "Okay Zombie Bears Club",
    image: "https://i.seadn.io/gcs/files/e7732689e69a07bd104e2fc7c0302912.gif?auto=format&w=3840",
    description:
      "Infected, diseased, dead, and brought back to life. Join the Zombie Bear Club.",
    contractAddress: "0x8137A2fDC9111aAa8BeeD9eb72905F2C391FD55F",
  },
];
```

Open [http://localhost:3000](http://localhost:3000/) with your browser to see the result. [Okay Zombie Bears Club](https://opensea.io/collection/okay-zombie-bears-club) is an example NFT, but try it out with an NFT or SPL token that you own!

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**Congrats**

You now have a working incremental authorization codebase to start hacking on!&#x20;

If you have any more questions or run into issue, don't hesitate to reach out to <team@picketapi.com>
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