Configure smart wallets in the SDK

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Setup

First install the necessary peer dependencies:

npm install permissionless viem

To set up your app with smart wallets, first import the SmartWalletsProvider component from @privy-io/react-auth/smart-wallets and wrap your app with it.

The SmartWalletsProvider must wrap any component or page that will use smart wallets. We recommend rendering it as close to the root of your application as possible, nested within your PrivyProvider.

import {PrivyProvider} from '@privy-io/react-auth';
import {SmartWalletsProvider} from '@privy-io/react-auth/smart-wallets';

export default function Providers({children}: {children: React.ReactNode}) {
  return (
    <PrivyProvider appId="your-privy-app-id">
      <SmartWalletsProvider>{children}</SmartWalletsProvider>
    </PrivyProvider>
  );
}

​

Creating smart wallets

Once the SmartWalletsProvider component is rendered and a smart wallet configuration has been set up for your app in the Dashboard, Privy will automatically generate smart wallets for your users once they have an embedded wallet. The embedded wallet is used as the primary signer controlling the smart wallet.

You can configure your app to create embedded wallets automatically on login or manually; smart wallets will be created following the same configuration.

​

Overriding paymaster context

Certain paymasters, like Alchemy and Biconomy, use an additional paymasterContext for gas sponsorship. Privy constructs this paymaster context based on either dashboard provided gas policy ID for Alchemy or a default set of values for Biconomy. However, you can override these defaults by passing a paymasterContext prop to the SmartWalletsProvider. See an example of how to set this below:

<SmartWalletsProvider
  config={{
    paymasterContext: {
      mode: 'SPONSORED',
      calculateGasLimits: true,
      expiryDuration: 300,
      sponsorshipInfo: {
        webhookData: {},
        smartAccountInfo: {
          name: 'BICONOMY',
          version: '2.0.0'
        }
      }
    }
  }}
>
  {children}
</SmartWalletsProvider>

​

Setup

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1. Set up your build configuration

Ensure you’ve followed the steps in custom build configuration.

Additionally, add permissionless to the list of modules that require package exports in your metro.config.js file.

//...other config logic

// Enable package exports for select libraries
...
const resolveRequestWithPackageExports = (context, moduleName, platform) => {
  if (moduleName.startsWith('@privy-io/') || moduleName.startsWith('permissionless')) {
    const ctx = {
      ...context,
      unstable_enablePackageExports: true,
    };
    return ctx.resolveRequest(ctx, moduleName, platform);
  }

  return context.resolveRequest(context, moduleName, platform);
};

​

2. Install peer dependencies

npx expo install viem permissionless

​

3. Import and wrap your app with the SmartWalletsProvider

The SmartWalletsProvider must wrap any component or page that will use smart wallets. We recommend rendering it as close to the root of your application as possible, nested within your PrivyProvider.

import {PrivyProvider} from '@privy-io/expo';
import {SmartWalletsProvider} from '@privy-io/expo/smart-wallets';

export default function Providers({children}: {children: React.ReactNode}) {
  return (
    <PrivyProvider
      appId={Constants.expoConfig?.extra?.privyAppId}
      clientId={Constants.expoConfig?.extra?.privyAppClientId}
    >
      <SmartWalletsProvider>{children}</SmartWalletsProvider>
    </PrivyProvider>
  );
}

​

Creating smart wallets

Once the SmartWalletsProvider component is rendered and a smart wallet configuration has been set up for your app in the Dashboard, Privy will automatically generate smart wallets for your users once they have an embedded wallet. The embedded wallet is used as the primary signer controlling the smart wallet.

You can configure your app to create embedded wallets manually; smart wallets will be created following the same configuration.