# useEmail

Returns the email address of the buyer that is interacting with the cart.
The value is `undefined` if the app does not have access to customer data.

## 

### UseEmailGeneratedType

Returns the email address of the buyer that is interacting with the cart.
The value is `undefined` if the app does not have access to customer data.

#### Returns: string | undefined
export function useEmail<
  ID extends RenderExtensionPoint = RenderExtensionPoint,
>(): string | undefined {
  const buyerIdentity = useApi<ID>().buyerIdentity;

  if (!buyerIdentity) {
    throw new ScopeNotGrantedError(
      'Using buyer identity requires having personal customer data permissions granted to your app.',
    );
  }

  return useSubscription(buyerIdentity.email);
}


## Related

- [StandardApi](https://shopify.dev/docs/api/checkout-ui-extensions/apis/standardapi)
- [CheckoutApi](https://shopify.dev/docs/api/checkout-ui-extensions/apis/checkoutapi)
- [OrderStatusApi](https://shopify.dev/docs/api/checkout-ui-extensions/apis/orderstatusapi)
- [CartLineDetailsApi](https://shopify.dev/docs/api/checkout-ui-extensions/apis/cartlinedetailsapi)
- [PickupPointsApi](https://shopify.dev/docs/api/checkout-ui-extensions/apis/pickuppointsapi)
- [PickupLocationsApi](https://shopify.dev/docs/api/checkout-ui-extensions/apis/pickuplocationsapi)
- [ShippingMethodDetailsApi](https://shopify.dev/docs/api/checkout-ui-extensions/apis/shippingmethoddetailsapi)
- [ExtensionPoints](https://shopify.dev/docs/api/checkout-ui-extensions/apis/extensionpoints)