# CartBuyerIdentityUpdatePayload

Payload returned by the cartBuyerIdentityUpdate mutation. This type contains the updated cart information and any errors that occurred during the buyer identity update operation.

## Type Definition

```graphql
type CartBuyerIdentityUpdatePayload {
  cart: Cart
  userErrors: [UserError]!
}
```

## Fields

| Field | Type | Description |
|-------|------|-------------|
| `cart` | [`Cart`](/reference/storefront/v1/objects/cart) | The updated cart |
| `userErrors` | `[UserError]!` | List of errors that occurred during cart buyer identity update |

## Relationships

CartBuyerIdentityUpdatePayload is returned by the `cartBuyerIdentityUpdate` mutation. It contains a reference to a [`Cart`](/reference/storefront/v1/objects/cart) object representing the updated cart state, and a list of [`UserError`](/reference/storefront/v1/objects/user-error) objects that describe any validation or operation errors that occurred during the buyer identity update process.

## Example

```graphql
mutation {
  cartBuyerIdentityUpdate(cartId: "eyJhbGciOiJIUzI1NiJ9...") {
    cart {
      id
      checkoutUrl
    }
    userErrors {
      field
      message
    }
  }
}
```

## Implements

This type does not implement any interfaces.

## Related Types

- [Cart](/reference/storefront/v1/objects/cart)
- [UserError](/reference/storefront/v1/objects/user-error)