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# UpdateCheckoutDataInput

GraphQL input

Update checkout data input object

Reference: https://docs.bigcommerce.com/developer/api-reference/graphql/storefront/types/inputs/update-checkout-data-input

## Fields

- `lineItems` — List of cart line items. Any existing line items not included in this list will be removed.
- `shippingConsignments` — The list of shipping consignments. Any existing consignments not included in this list will be removed.
- `billingAddress` — The checkout billing address
- `customerMessage` — The checkout customer message
- `coupons` — List of coupon codes to apply to the checkout

## Definition

```graphql
input UpdateCheckoutDataInput {
  lineItems: [CartLineItemUpdateCheckoutInput!]
  shippingConsignments: [ShippingConsignmentUpdateCheckoutInput!]
  billingAddress: CheckoutAddressInput
  customerMessage: String
  coupons: [String!]
}
```