Create a new Astro project by using the Astro CLI. More information about Astro can be found here.

npm create astro@latest

Astro does not come with React by default, so if you are not already using React in your application, you will need to install it.

npx astro add react

Add OnchainKit to your project by installing the @coinbase/onchainkit package.

npm install @coinbase/onchainkit

Get your Client API Key from Coinbase Developer Platform.

Create a .env file in your project's root directory.

Add your Client API Key to the .env file:

PUBLIC_ONCHAINKIT_API_KEY=YOUR_CLIENT_API_KEY

In order to use OnchainKit, you need to wrap your app with three providers:

1. <WagmiProvider />
2. <QueryClientProvider />
3. <OnchainKitProvider />

To accomplish this, we recommend creating a wagmi.ts file and an AppProviders.tsx file within the src directory.

You must add base as a supported chain in the Wagmi configuration file wagmi.ts. You can use baseSepolia for testing.

import { http, cookieStorage, createConfig, createStorage } from 'wagmi';
import { base } from 'wagmi/chains'; // add baseSepolia for testing
import { coinbaseWallet } from 'wagmi/connectors';
 
export function getConfig() {
  return createConfig({
    chains: [base], // add baseSepolia for testing
    connectors: [
      coinbaseWallet({
        appName: 'OnchainKit',
        preference: 'smartWalletOnly',
        version: '4',
      }),
    ],
    storage: createStorage({
      storage: cookieStorage,
    }),
    ssr: true,
    transports: {
      [base.id]: http(), // add baseSepolia for testing
    },
  });
}
 
declare module 'wagmi' {
  interface Register {
    config: ReturnType<typeof getConfig>;
  }
}

After configuring the providers in step 4, you will need to wrap your OnchainKit components with the <AppProviders /> component.

There are two options for this:

1. Create a component, eg. <ReactIsland /> that contains all OnchainKit components.
2. Wrap every OnchainKit component individually.

import { AppProviders } from '../AppProviders';
 
export default function ReactIsland() {
  return (
    <AppProviders>
      <YourReactAppContainingOnchainKitComponents />
    </AppProviders>
  );
}

The advantage of ReactIsland is that you will only have a single provider at any time. The drawback is that your OnchainKit components will all need to live in the same Island.

The advantage of individal wrappers is that you can use OnchainKit components anywhere in your app. The drawback is that you will have multiple providers if you use more than one OnchainKit component.

You can add OnchainKit components to your app by using the component(s) you created above into your .astro files.

For example, if you created a ReactIsland, you can add it to your src/pages/index.astro file:

---
import Layout from '../layouts/Layout.astro';
import ReactIsland from '../components/ReactIsland';
---
 
<Layout title="Welcome to Astro.">
	<main>
    ...
		<ReactIsland client:only="react" />
    ...
	</main>
</Layout>

Don't forget to add the client:only="react" directive to your OnchainKit component, as this is required for Astro to render React components.

OnchainKit components come with pre-configured styles. To include these styles in your project, add the following import statement at the top of the Layout.astro file:

import '@coinbase/onchainkit/styles.css';

This ensures that the OnchainKit styles are loaded and applied to your entire application.

• For Tailwind CSS users, check out our Tailwind Integration Guide.

• Update the appearance of components by using our built-in themes or crafting your own custom theme. Explore the possibilities in our Theming Guide.