> ## Documentation Index
> Fetch the complete documentation index at: https://base-a060aa97-fix-dead-service-links.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# generateKeyPair

> Generate a new P256 key pair for use with Base Account

export const Button = ({children, disabled, variant = "primary", size = "medium", iconName, roundedFull = false, className = '', fullWidth = false, onClick = undefined}) => {
  const variantStyles = {
    primary: 'bg-blue text-black border border-blue hover:bg-blue-80 active:bg-[#06318E] dark:text-white',
    secondary: 'bg-white border border-white text-palette-foreground hover:bg-zinc-15 active:bg-zinc-30',
    outlined: 'bg-transparent text-white border border-white hover:bg-white hover:text-black active:bg-[#E3E7E9]'
  };
  const sizeStyles = {
    medium: 'text-md px-4 py-2 gap-3',
    large: 'text-lg px-6 py-4 gap-5'
  };
  const sizeIconRatio = {
    medium: '0.75rem',
    large: '1rem'
  };
  const classes = ['text-md px-4 py-2 whitespace-nowrap', 'flex items-center justify-center', 'disabled:opacity-40 disabled:pointer-events-none', 'transition-all', variantStyles[variant], sizeStyles[size], roundedFull ? 'rounded-full' : 'rounded-lg', fullWidth ? 'w-full' : 'w-auto', className];
  const buttonClasses = classes.filter(Boolean).join(' ');
  const iconSize = sizeIconRatio[size];
  return <button type="button" disabled={disabled} className={buttonClasses} onClick={onClick}>
      <span>{children}</span>
      {iconName && <Icon name={iconName} width={iconSize} height={iconSize} color="currentColor" />}
    </button>;
};

export const BaseBanner = ({content = null, id, dismissable = true}) => {
  const LOCAL_STORAGE_KEY_PREFIX = 'cb-docs-banner';
  const [isVisible, setIsVisible] = useState(false);
  const onDismiss = () => {
    localStorage.setItem(`${LOCAL_STORAGE_KEY_PREFIX}-${id}`, 'false');
    setIsVisible(false);
  };
  useEffect(() => {
    const storedValue = localStorage.getItem(`${LOCAL_STORAGE_KEY_PREFIX}-${id}`);
    setIsVisible(storedValue !== 'false');
  }, []);
  if (!isVisible) {
    return null;
  }
  return <div className="fixed bottom-0 left-0 right-0 bg-white py-8 px-4 lg:px-12 z-50 text-black dark:bg-black dark:text-white border-t dark:border-gray-95">
      <div className="flex items-center max-w-8xl mx-auto">
        {typeof content === 'function' ? content({
    onDismiss
  }) : content}
        {dismissable && <button onClick={onDismiss} className="flex-shrink-0 text-gray-400 hover:text-gray-600 dark:hover:text-gray-300 transition-colors" aria-label="Dismiss banner">
          ✕
        </button>}
      </div>
    </div>;
};

Defined in the [Base Account SDK](https://github.com/base/account-sdk)

<Info>
  Generates a new P256 key pair for use with Base Account. This is essential for advanced integrations and Sub Account management.
</Info>

## Parameters

This function takes no parameters.

## Returns

<ResponseField name="result" type="P256KeyPair">
  A P256 key pair object containing the public and private keys.

  <Expandable title="P256KeyPair properties">
    <ResponseField name="publicKey" type="string">
      The public key for the generated pair in hexadecimal format.
    </ResponseField>

    <ResponseField name="privateKey" type="string">
      The private key for the generated pair. Handle with extreme care.
    </ResponseField>
  </Expandable>
</ResponseField>

<RequestExample>
  ```typescript Basic Usage theme={null}
  import { generateKeyPair } from '@base-org/account';

  const keyPair = await generateKeyPair();
  console.log('Public key:', keyPair.publicKey);
  ```

  ```typescript Error Handling theme={null}
  try {
    const keyPair = await generateKeyPair();
    return keyPair;
  } catch (error) {
    console.error('Failed to generate key pair:', error);
    throw error;
  }
  ```
</RequestExample>

<ResponseExample>
  ```typescript Success Response theme={null}
  {
    publicKey: "0x04a1b2c3d4e5f6...",
    privateKey: "0x1a2b3c4d5e6f7a..."
  }
  ```
</ResponseExample>

## Error Handling

| Code | Message                      | Description                                                  |
| ---- | ---------------------------- | ------------------------------------------------------------ |
| 4100 | Key generation not supported | Browser does not support cryptographic key generation        |
| 4200 | Insufficient entropy         | System lacks sufficient randomness for secure key generation |
| 4300 | Cryptographic system failure | Hardware or software cryptographic failure                   |

<Warning>
  **Private Key Security**

  Never expose private keys in client-side code or transmit them over insecure channels. Store them securely using appropriate key management systems.
</Warning>

## Integration with Sub Accounts

```typescript theme={null}
import { generateKeyPair, createBaseAccountSDK } from '@base-org/account';

async function createSubAccountWithNewKeys() {
  const sdk = createBaseAccountSDK({
    appName: 'My App',
    appLogoUrl: 'https://example.com/logo.png',
    appChainIds: [8453], // Base mainnet
  });

  // Generate new key pair for sub account
  const keyPair = await generateKeyPair();
  
  // Create sub account with the generated keys
  const subAccount = await sdk.subAccount.create({
    type: 'create',
    keys: [{
      type: 'webauthn-p256',
      publicKey: keyPair.publicKey,
    }],
  });
  
  return { subAccount, keyPair };
}
```

## Error Handling

The `generateKeyPair` function can throw errors for:

* Cryptographic system failures
* Insufficient entropy
* Browser compatibility issues

Always wrap calls to `generateKeyPair` in a try-catch block:

```typescript theme={null}
try {
  const keyPair = await generateKeyPair();
  // Handle successful generation
} catch (error) {
  if (error.message.includes('not supported')) {
    console.error('Browser does not support key generation');
  } else {
    console.error('Key generation failed:', error);
  }
}
```

## Security Considerations

<Warning>
  **Private Key Security**

  Never expose private keys in client-side code or transmit them over insecure channels. Store them securely using appropriate key management systems.
</Warning>

* Store private keys using secure storage mechanisms
* Never log private keys to console in production
* Consider using hardware security modules for production applications
* Implement proper key rotation policies

<BaseBanner
  id="privacy-policy"
  dismissable={false}
  content={({ onDismiss }) => (
<div className="flex items-center">
  <div className="mr-2">
    We're updating the Base Privacy Policy, effective July 25, 2025, to reflect an expansion of Base services. Please review the updated policy here:{" "}
    <a
      href="https://docs.base.org/privacy-policy-2025"
      target="_blank"
      className="whitespace-nowrap"
    >
      Base Privacy Policy
    </a>. By continuing to use Base services, you confirm that you have read and understand the updated policy.
  </div>
  <Button onClick={onDismiss}>I Acknowledge</Button>
</div>
)}
/>