> Portal Navigation:
> 
> - Append `.md` to any URL under `https://dev.wix.com/docs/` to get its markdown version.
> - Pages are either content pages (article or reference text) or menu pages (a list of links to child pages).
> - To get a menu page, truncate any URL to a parent path and append `.md` (e.g. `https://dev.wix.com/docs/sdk.md`, `https://dev.wix.com/docs/sdk/core-modules.md`).
> - Top-level index of all portals: https://dev.wix.com/docs/llms.txt
> - Full concatenated docs: https://dev.wix.com/docs/llms-full.txt

# Package: checkout

# Namespace: checkoutTemplates

# Webhook link: https://dev.wix.com/docs/api-reference/business-solutions/e-commerce/purchase-flow/checkout/checkout-templates/checkout-template-updated.md

## Introduction

Triggered when a checkout template is updated.

---

## REST API

### Schema

```
Webhook: Checkout Template Updated
Description: Triggered when a checkout template is updated.
Event body:
 - name: id | type: string | description: Unique event ID. Allows clients to ignore duplicate events.
 - name: entityFqdn | type: string | description: Fully qualified domain name of the entity associated with the event.
 - name: slug | type: string | description: Event name.
 - name: entityId | type: string | description: ID of the entity associated with the event.
 - name: eventTime | type: string (date-time) | description: Event timestamp.
 - name: triggeredByAnonymizeRequest | type: boolean | description: Whether the event was triggered as a result of a privacy regulation application such as GDPR.
 - name: originatedFrom | type: string | description: If present, indicates the action that triggered the event.
 - name: updatedEvent | type: object | description: Updated event details.
    - name: currentEntity | type: CheckoutTemplate | description: The entity after the update.
        - name: id | type: string | description: Checkout template GUID.
        - name: status | type: Status | description: Status of the checkout template.  When `status` is `INACTIVE` checkouts will not be created with this template `id`. Instead, the endpoint will redirect to the domain site.  Default: `ACTIVE`
           - enum: ACTIVE, INACTIVE
        - name: customization | type: CheckoutCustomization | description: Custom settings to apply to the checkout page created from this template.
           - name: webClient | type: WebClientCustomization | description: Web client customizations. These customizations only apply to the standard Wix checkout page.
              - name: disabledContinueShoppingButton | type: boolean | description: Whether to disable the "Continue shopping" button.  Default: `false`
              - name: disabledPolicyAgreementCheckbox | type: boolean | description: Whether to disable policy agreement checkout in the checkout page  Default: `false`
           - name: lockedGiftCard | type: boolean | description: Whether to lock the ability to add or remove a gift card.  Default: `false`
           - name: lockedCoupon | type: boolean | description: Whether to lock the ability to apply or remove a coupon code.  Default: `false`
           - name: disabledManualPayment | type: boolean | description: Whether to disable manual payment option for this checkout.  Default: `false`
        - name: lineItems | type: array<LineItem> | description: Catalog line items.  Max: 300 items
           - name: quantity | type: integer | description: Item quantity.  Min: `1` <br /> Max: `100000`
           - name: catalogReference | type: CatalogReference | description: Catalog and item reference. Holds GUIDs for the item and the catalog it came from, as well as further optional info. Optional for custom line items, which don't trigger the Catalog service plugin.
              - name: catalogItemId | type: string | description: GUID of the item within the catalog it belongs to.
              - name: appId | type: string | description: GUID of the app providing the catalog.  You can get your app's GUID from its page in the [app dashboard](https://dev.wix.com/dc3/my-apps/).  For items from Wix catalogs, the following values always apply: + Wix Stores: `"215238eb-22a5-4c36-9e7b-e7c08025e04e"` + Wix Bookings: `"13d21c63-b5ec-5912-8397-c3a5ddb27a97"` + Wix Restaurants: `"9a5d83fd-8570-482e-81ab-cfa88942ee60"`
              - name: options | type: object | description: Additional item details in `key:value` pairs.  Use this optional field for more specificity with item selection. The values of the `options` field differ depending on which catalog is providing the items.  For Wix Stores products, learn more about integrating with [Catalog V3](https://dev.wix.com/docs/api-reference/business-solutions/stores/catalog-v3/e-commerce-integration.md) or [Catalog V1](https://dev.wix.com/docs/api-reference/business-solutions/stores/catalog-v1/catalog/e-commerce-integration.md), depending on [the version the site uses](https://dev.wix.com/docs/api-reference/business-solutions/stores/catalog-versioning/introduction.md).
           - name: catalogOverrideFields | type: CatalogOverrideFields | description: Overriding values for catalog item properties.
              - name: productName | type: ProductName | description: Item name.
                 - name: original | type: string | description: __Required.__ Item name in the site's default language as defined in the [request envelope](https://dev.wix.com/docs/build-apps/develop-your-app/frameworks/self-hosting/supported-extensions/backend-extensions/add-self-hosted-service-plugin-extensions.md#request-envelope).  Min: 1 character. Max: 200 characters.
                 - name: translated | type: string | description: Item name translated into the buyer's language.  Min: 1 character. Max: 400 characters. Default: Same as `original`.
              - name: price | type: string | description: Item price **after** discounts.
              - name: fullPrice | type: string | description: Item price **before** discounts.
              - name: descriptionLines | type: array<DescriptionLine> | description: Item description lines. Used when displaying the line item to customers.
                 - ONE-OF:
                    - name: plainText | type: PlainTextValue | description: Description line plain text value.
                       - name: original | type: string | description: Description line plain text value in the site's default language as defined in the [request envelope](https://dev.wix.com/docs/build-apps/develop-your-app/frameworks/self-hosting/supported-extensions/backend-extensions/add-self-hosted-service-plugin-extensions.md#request-envelope).
                       - name: translated | type: string | description: Description line plain text value translated into the buyer's language.  Default: Same as `original`.
                    - name: colorInfo | type: Color | description: Description line color value.
                       - name: original | type: string | description: Description line color name in the site's default language as defined in the [request envelope](https://dev.wix.com/docs/build-apps/develop-your-app/frameworks/self-hosting/supported-extensions/backend-extensions/add-self-hosted-service-plugin-extensions.md#request-envelope).
                       - name: translated | type: string | description: Description line color name translated into the buyer's language.  Default: Same as `original`.
                       - name: code | type: string | description: HEX or RGB color code for display.
                 - name: name | type: DescriptionLineName | description: Description line name.
                    - name: original | type: string | description: Description line name in the site's default language as defined in the [request envelope](https://dev.wix.com/docs/build-apps/develop-your-app/frameworks/self-hosting/supported-extensions/backend-extensions/add-self-hosted-service-plugin-extensions.md#request-envelope).
                    - name: translated | type: string | description: Description line name translated into the buyer's language.  Default: Same as `original`.
              - name: physicalProperties | type: PhysicalProperties | description: Physical properties of the item.
                 - name: weight | type: number | description: Line item weight. Measurement unit matches the weight unit specified in `weightUnit` in the request.
                 - name: sku | type: string | description: Stock-keeping unit. Learn more about [SKUs](https://www.wix.com/encyclopedia/definition/stock-keeping-unit-sku).
                 - name: shippable | type: boolean | description: Whether this line item is shippable.
              - name: image | type: Image | description: Item image.
                 - name: id | type: string | description: WixMedia image GUID.
                 - name: height | type: integer | description: Original image height.
                 - name: width | type: integer | description: Original image width.
                 - name: altText | type: string | description: Image alt text. Optional.
                 - name: filename | type: string | description: Image filename. Optional.
              - name: paymentOption | type: PaymentOption | description: Payment method selected for the item.
                 - name: value | type: PaymentOptionType | description: Type of selected payment option for current item.  Default: `FULL_PAYMENT_ONLINE`
                       - enum:
                       -     FULL_PAYMENT_ONLINE: The entire payment for this item happens as part of the checkout.
                       -     FULL_PAYMENT_OFFLINE: The entire payment for this item happens after checkout. For example, when using cash, check, or other offline payment methods.
                       -     MEMBERSHIP: Payment for this item is done by charging a membership. Any remaining amount not covered by the membership, such as item modifiers, is paid online.
                       -     DEPOSIT_ONLINE: Partial payment to be paid upfront during checkout. The initial amount to be paid for each line item is specified in `depositAmount`.
                       -     MEMBERSHIP_OFFLINE: Payment for this item can only be done by charging a membership and must be manually redeemed in the dashboard by the site admin. When selected, `price` is `0`.
                       -     MEMBERSHIP_ONLINE_WITH_OFFLINE_REMAINDER: Item price is charged to online membership. Any remaining amount not covered by the membership, such as item modifiers, is paid offline.
              - name: depositAmount | type: string | description: Only eligible for catalog items with `lineItem.paymentOption.value` type of `DEPOSIT_ONLINE`.
              - name: savePaymentMethod | type: boolean | description: Whether to save the payment method on the order.  Default: `false`
              - name: inventoryAppId | type: string | description: GUID of the app managing the inventory.
        - name: customLineItems | type: array<CustomLineItem> | description: Custom line items. Custom line items don't trigger the Catalog service plugin.  Max: 300 items
           - name: quantity | type: integer | description: Custom line item quantity.  Min: `1` Max: `100000`
           - name: price | type: string | description: Custom line item price.  Must be a number or a decimal without symbols.
           - name: priceDescription | type: PriceDescription | description: Additional description for the price. For example, when price is 0 but additional details about the actual price are needed - "Starts at $67".
              - name: original | type: string | description: __Required.__ Price description in the site's default language as defined in the [request envelope](https://dev.wix.com/docs/build-apps/develop-your-app/frameworks/self-hosting/supported-extensions/backend-extensions/add-self-hosted-service-plugin-extensions.md#request-envelope).
              - name: translated | type: string | description: Price description translated into the buyer's language.  Default: Same as `original`.
           - name: descriptionLines | type: array<DescriptionLine> | description: Custom line item description lines. Used for display purposes for the cart, checkout and order.
           - name: media | type: Image | description: Custom line item's media.
           - name: taxGroupId | type: string | description: Tax group GUID for this custom line item.
           - name: productName | type: ProductName | description: Name of the item or product.
           - name: url | type: PageUrlV2 | description: URL to the item's page on the site. When not provided, the link back from the cart page to the relevant product page will not work.
              - name: relativePath | type: string | description: The relative path for the page within the site. For example, `/product-page/a-product`.
              - name: url | type: string | description: The page's full URL. For example, `https://mysite.com/product-page/a-product`.
           - name: itemType | type: ItemType | description: Item type. Either a preset type or custom.
              - ONE-OF:
                 - name: preset | type: ItemTypePreset | description: Preset item type.
                       - enum: UNRECOGNISED, PHYSICAL, DIGITAL, GIFT_CARD, SERVICE
                 - name: custom | type: string | description: Custom item type. When none of the preset types are suitable, specifies the custom type.
           - name: fullPrice | type: string | description: Item price **before** catalog-defined discount. Defaults to `price` when not provided.
           - name: quantityAvailable | type: integer | description: Item quantity available for purchase. Only return this if inventory is managed. Not returning this field means that the buyer can "infinitely" tick up the number of items in the cart.
           - name: physicalProperties | type: PhysicalProperties | description: Physical properties of the item.
           - name: paymentOption | type: PaymentOptionType | description: Type of selected payment option for current item. Defaults to `FULL_PAYMENT_ONLINE`.  + `FULL_PAYMENT_ONLINE` - Entire payment for this item happens as part of the checkout. + `FULL_PAYMENT_OFFLINE` - Entire payment for this item happens after the checkout. For example, when using cash, check, or other offline payment methods. + `MEMBERSHIP` - Payment for this item is done by charging a membership. When this option is used, `lineItem.price.amount` is 0. + `DEPOSIT_ONLINE` -  Partial payment for the given item to be paid upfront during the checkout. Amount to be paid is defined by deposit_amount field.
               - enum:
               -     FULL_PAYMENT_ONLINE: The entire payment for this item happens as part of the checkout.
               -     FULL_PAYMENT_OFFLINE: The entire payment for this item happens after checkout. For example, when using cash, check, or other offline payment methods.
               -     MEMBERSHIP: Payment for this item is done by charging a membership. Any remaining amount not covered by the membership, such as item modifiers, is paid online.
               -     DEPOSIT_ONLINE: Partial payment to be paid upfront during checkout. The initial amount to be paid for each line item is specified in `depositAmount`.
               -     MEMBERSHIP_OFFLINE: Payment for this item can only be done by charging a membership and must be manually redeemed in the dashboard by the site admin. When selected, `price` is `0`.
               -     MEMBERSHIP_ONLINE_WITH_OFFLINE_REMAINDER: Item price is charged to online membership. Any remaining amount not covered by the membership, such as item modifiers, is paid offline.
           - name: serviceProperties | type: ServiceProperties | description: Service properties. When relevant, this contains information such as date and number of participants. Used, among other things, when checking for valid memberships.
              - name: scheduledDate | type: string | description: Date and time the service is to be provided, in [ISO-8601](https://en.wikipedia.org/wiki/ISO_8601#Combined_date_and_time_representations) format. For example, the start time of a class.
              - name: numberOfParticipants | type: integer | description: The number of people participating in the service. For example, the number of people attending a class or the number of people per hotel room.
           - name: rootCatalogItemId | type: string | description: In cases where `catalogReference.catalogItemId` is NOT the actual catalog item GUID, this field will return the true item's GUID.  + For example, for Wix Bookings, `catalogReference.catalogItemId` is the booking GUID. Therefore this value is set to the service GUID. + In most cases, this field is the same as `catalogReference.catalogItemId`. + Used in membership validation.
           - name: depositAmount | type: string | description: Partial payment for the given item to be paid upfront during the checkout.  Eligible for catalog items with type `DEPOSIT_ONLINE`. When omitted, the item's price will not be split and is expected to be paid in a single installment.
           - name: deliveryProfileId | type: string | description: Delivery profile GUID.
           - name: catalogReference | type: CatalogReference | description: Catalog and item reference. Includes GUIDs for the item and the catalog it came from, as well as further optional info. Optional for custom line items, which don't trigger the Catalog service plugin.
           - name: priceUndetermined | type: boolean | description: Whether the price is not yet defined, and will be updated after the order is created.  Default: `false`
           - name: fixedQuantity | type: boolean | description: Whether the line item quantity is fixed and cannot be changed.  Default: `false`
           - name: consentRequiredPaymentPolicy | type: string | description: Item payment policy that requires customer consent to complete purchase. The payment policy will be displayed on the checkout page.
           - name: savePaymentMethod | type: boolean | description: Whether to save the payment method on the order.  Default: `false`
           - name: policies | type: array<Policy> | description: Policies to be displayed to the customer on the checkout page.
              - name: title | type: string | description: Policy title - should be translated
              - name: content | type: string | description: Policy content - should be translated
           - name: membersOnly | type: boolean | description: Whether the item can only be purchased by site members.  Default: `false`
           - name: taxableAddress | type: TaxableAddress | description: Address to use for tax calculation purposes.
              - ONE-OF:
                 - name: addressType | type: TaxableAddressType | description: taxable address type. if this field is selected, the address is automatically resolved, and the tax is calculated accordingly.
                       - enum: BUSINESS, BILLING, SHIPPING
           - name: modifierGroups | type: array<ModifierGroup> | description: Modifier groups that were added to the item.
              - name: id | type: string | description: Modifier group GUID.
              - name: name | type: TranslatableString | description: Modifier group name.
                 - name: original | type: string | description: __Required.__ String in the site's default language as defined in the [request envelope](https://dev.wix.com/docs/build-apps/develop-your-app/frameworks/self-hosting/supported-extensions/backend-extensions/add-self-hosted-service-plugin-extensions.md#request-envelope).  Min: 1 character. Max: 200 characters.
                 - name: translated | type: string | description: String translated into the buyer's language.  Min: 1 character. Max: 400 characters. Default: Same as `original`.
              - name: modifiers | type: array<ItemModifier> | description: List of modifiers in this group.
                 - name: id | type: string | description: Modifier GUID.
                 - name: quantity | type: integer | description: The quantity of this modifier.
                 - name: label | type: TranslatableString | description: Primary display label for the modifier.
                 - name: details | type: TranslatableString | description: Additional details.
                 - name: price | type: string | description: The price of the modifier.
        - name: couponCode | type: string | description: Coupon code.  Note that a checkout can only hold one `couponCode` at a time. If an additional `couponCode` is added, it will override the existing `couponCode`. For additional information, see the Coupons API.
        - name: customContentReference | type: CustomContentReference | description: Reference GUIDs for the app and component providing custom checkout page content.  To access and manage custom checkout page content, your app must have the permission scope named "Manage eCommerce - Admin Permissions". Learn more about [permission scopes](https://dev.wix.com/docs/build-apps/develop-your-app/access/authorization/about-permissions.md).
           - name: appId | type: string | description: GUID of the app providing the content.  You can get your app's GUID from its page in the [app dashboard](https://dev.wix.com/dc3/my-apps/).
           - name: componentId | type: string | description: GUID of the component within the app it belongs to.  You can get your component's GUID from its page in the [app dashboard](https://dev.wix.com/dc3/my-apps/).
        - name: externalReference | type: ExternalReference | description: References to an external app and resource associated with the checkout. Used for integration and tracking across different platforms.
           - name: appId | type: string | description: GUID of the app associated with the purchase flow. For example, the Wix Pay Links app GUID.
           - name: resourceId | type: string | description: Reference to an external resource GUID. Used to link the purchase flow to a specific entity in an external system. For example, a Wix Pay Link GUID.

```

### Examples


```curl
{
  "id": "295e8d31-92e3-4868-9b2f-c6da5cb0abff",
  "entityFqdn": "wix.ecom.v1.checkout_template",
  "slug": "updated",
  "entityId": "825315ef-1b62-40f7-ab62-97b751ebf285",
  "updatedEvent": {
    "currentEntity": 
      {
        "id": "825315ef-1b62-40f7-ab62-97b751ebf285",
        "status": "ACTIVE",
        "customization": {
          "webClient": {
            "disabledContinueShoppingButton": true
          },
          "lockedGiftCard": false,
          "lockedCoupon": true
        },
        "lineItems": [{
          "quantity": 4,
          "catalogReference": {
            "catalogItemId": "8df1afe4-90d1-162d-2d42-b8308125c193",
            "appId": "215238eb-22a5-4c36-9e7b-e7c08025e04e",
            "options": {
              "options": {
                "Size": "Small"
              },
              "variantId": "00000000-0000-0000-0000-000000000000"
            }
          }
        }],
        "couponCode": "SUMMER_FLASH_SALE"
      }
  },
  "eventTime": "2023-09-11T09:32:02.365080Z",
  "triggeredByAnonymizeRequest": false,
  "entityEventSequence": "3"
}

```

---

## JavaScript SDK

### Schema

```
Webhook: onCheckoutTemplateUpdated
Description: Triggered when a checkout template is updated.
Payload: CheckoutTemplateUpdatedEnvelope
  - name: entity | type: CheckoutTemplate | description: none
     - name: _id | type: string | description: Checkout template GUID.
     - name: status | type: Status | description: Status of the checkout template.  When `status` is `INACTIVE` checkouts will not be created with this template `id`. Instead, the endpoint will redirect to the domain site.  Default: `ACTIVE`
         - enum: ACTIVE, INACTIVE
     - name: customization | type: CheckoutCustomization | description: Custom settings to apply to the checkout page created from this template.
        - name: webClient | type: WebClientCustomization | description: Web client customizations. These customizations only apply to the standard Wix checkout page.
           - name: disabledContinueShoppingButton | type: boolean | description: Whether to disable the "Continue shopping" button.  Default: `false`
           - name: disabledPolicyAgreementCheckbox | type: boolean | description: Whether to disable policy agreement checkout in the checkout page  Default: `false`
        - name: lockedGiftCard | type: boolean | description: Whether to lock the ability to add or remove a gift card.  Default: `false`
        - name: lockedCoupon | type: boolean | description: Whether to lock the ability to apply or remove a coupon code.  Default: `false`
        - name: disabledManualPayment | type: boolean | description: Whether to disable manual payment option for this checkout.  Default: `false`
     - name: lineItems | type: array<LineItem> | description: Catalog line items.  Max: 300 items
        - name: quantity | type: integer | description: Item quantity.  Min: `1` <br /> Max: `100000`
        - name: catalogReference | type: CatalogReference | description: Catalog and item reference. Holds GUIDs for the item and the catalog it came from, as well as further optional info. Optional for custom line items, which don't trigger the Catalog service plugin.
           - name: catalogItemId | type: string | description: GUID of the item within the catalog it belongs to.
           - name: appId | type: string | description: GUID of the app providing the catalog.  You can get your app's GUID from its page in the [app dashboard](https://dev.wix.com/dc3/my-apps/).  For items from Wix catalogs, the following values always apply: + Wix Stores: `"215238eb-22a5-4c36-9e7b-e7c08025e04e"` + Wix Bookings: `"13d21c63-b5ec-5912-8397-c3a5ddb27a97"` + Wix Restaurants: `"9a5d83fd-8570-482e-81ab-cfa88942ee60"`
           - name: options | type: object | description: Additional item details in `key:value` pairs.  Use this optional field for more specificity with item selection. The values of the `options` field differ depending on which catalog is providing the items.  For Wix Stores products, learn more about integrating with [Catalog V3](https://dev.wix.com/docs/api-reference/business-solutions/stores/catalog-v3/e-commerce-integration.md) or [Catalog V1](https://dev.wix.com/docs/api-reference/business-solutions/stores/catalog-v1/catalog/e-commerce-integration.md), depending on [the version the site uses](https://dev.wix.com/docs/api-reference/business-solutions/stores/catalog-versioning/introduction.md).
        - name: catalogOverrideFields | type: CatalogOverrideFields | description: Overriding values for catalog item properties.
           - name: productName | type: ProductName | description: Item name.
              - name: original | type: string | description: __Required.__ Item name in the site's default language as defined in the [request envelope](https://dev.wix.com/docs/build-apps/develop-your-app/frameworks/self-hosting/supported-extensions/backend-extensions/add-self-hosted-service-plugin-extensions.md#request-envelope).  Min: 1 character. Max: 200 characters.
              - name: translated | type: string | description: Item name translated into the buyer's language.  Min: 1 character. Max: 400 characters. Default: Same as `original`.
           - name: price | type: string | description: Item price **after** discounts.
           - name: fullPrice | type: string | description: Item price **before** discounts.
           - name: descriptionLines | type: array<DescriptionLine> | description: Item description lines. Used when displaying the line item to customers.
              - ONE-OF:
                 - name: plainText | type: PlainTextValue | description: Description line plain text value.
                    - name: original | type: string | description: Description line plain text value in the site's default language as defined in the [request envelope](https://dev.wix.com/docs/build-apps/develop-your-app/frameworks/self-hosting/supported-extensions/backend-extensions/add-self-hosted-service-plugin-extensions.md#request-envelope).
                    - name: translated | type: string | description: Description line plain text value translated into the buyer's language.  Default: Same as `original`.
                 - name: colorInfo | type: Color | description: Description line color value.
                    - name: original | type: string | description: Description line color name in the site's default language as defined in the [request envelope](https://dev.wix.com/docs/build-apps/develop-your-app/frameworks/self-hosting/supported-extensions/backend-extensions/add-self-hosted-service-plugin-extensions.md#request-envelope).
                    - name: translated | type: string | description: Description line color name translated into the buyer's language.  Default: Same as `original`.
                    - name: code | type: string | description: HEX or RGB color code for display.
              - name: name | type: DescriptionLineName | description: Description line name.
                 - name: original | type: string | description: Description line name in the site's default language as defined in the [request envelope](https://dev.wix.com/docs/build-apps/develop-your-app/frameworks/self-hosting/supported-extensions/backend-extensions/add-self-hosted-service-plugin-extensions.md#request-envelope).
                 - name: translated | type: string | description: Description line name translated into the buyer's language.  Default: Same as `original`.
           - name: physicalProperties | type: PhysicalProperties | description: Physical properties of the item.
              - name: weight | type: number | description: Line item weight. Measurement unit matches the weight unit specified in `weightUnit` in the request.
              - name: sku | type: string | description: Stock-keeping unit. Learn more about [SKUs](https://www.wix.com/encyclopedia/definition/stock-keeping-unit-sku).
              - name: shippable | type: boolean | description: Whether this line item is shippable.
           - name: image | type: string | description: Item image.
           - name: paymentOption | type: PaymentOption | description: Payment method selected for the item.
              - name: value | type: PaymentOptionType | description: Type of selected payment option for current item.  Default: `FULL_PAYMENT_ONLINE`
                     - enum:
                     -     FULL_PAYMENT_ONLINE: The entire payment for this item happens as part of the checkout.
                     -     FULL_PAYMENT_OFFLINE: The entire payment for this item happens after checkout. For example, when using cash, check, or other offline payment methods.
                     -     MEMBERSHIP: Payment for this item is done by charging a membership. Any remaining amount not covered by the membership, such as item modifiers, is paid online.
                     -     DEPOSIT_ONLINE: Partial payment to be paid upfront during checkout. The initial amount to be paid for each line item is specified in `depositAmount`.
                     -     MEMBERSHIP_OFFLINE: Payment for this item can only be done by charging a membership and must be manually redeemed in the dashboard by the site admin. When selected, `price` is `0`.
                     -     MEMBERSHIP_ONLINE_WITH_OFFLINE_REMAINDER: Item price is charged to online membership. Any remaining amount not covered by the membership, such as item modifiers, is paid offline.
           - name: depositAmount | type: string | description: Only eligible for catalog items with `lineItem.paymentOption.value` type of `DEPOSIT_ONLINE`.
           - name: savePaymentMethod | type: boolean | description: Whether to save the payment method on the order.  Default: `false`
           - name: inventoryAppId | type: string | description: GUID of the app managing the inventory.
     - name: customLineItems | type: array<CustomLineItem> | description: Custom line items. Custom line items don't trigger the Catalog service plugin.  Max: 300 items
        - name: quantity | type: integer | description: Custom line item quantity.  Min: `1` Max: `100000`
        - name: price | type: string | description: Custom line item price.  Must be a number or a decimal without symbols.
        - name: priceDescription | type: PriceDescription | description: Additional description for the price. For example, when price is 0 but additional details about the actual price are needed - "Starts at $67".
           - name: original | type: string | description: __Required.__ Price description in the site's default language as defined in the [request envelope](https://dev.wix.com/docs/build-apps/develop-your-app/frameworks/self-hosting/supported-extensions/backend-extensions/add-self-hosted-service-plugin-extensions.md#request-envelope).
           - name: translated | type: string | description: Price description translated into the buyer's language.  Default: Same as `original`.
        - name: descriptionLines | type: array<DescriptionLine> | description: Custom line item description lines. Used for display purposes for the cart, checkout and order.
        - name: media | type: string | description: Custom line item's media.
        - name: taxGroupId | type: string | description: Tax group GUID for this custom line item.
        - name: productName | type: ProductName | description: Name of the item or product.
        - name: url | type: string | description: URL to the item's page on the site. When not provided, the link back from the cart page to the relevant product page will not work.
        - name: itemType | type: ItemType | description: Item type. Either a preset type or custom.
           - ONE-OF:
              - name: preset | type: ItemTypePreset | description: Preset item type.
                     - enum: UNRECOGNISED, PHYSICAL, DIGITAL, GIFT_CARD, SERVICE
              - name: custom | type: string | description: Custom item type. When none of the preset types are suitable, specifies the custom type.
        - name: fullPrice | type: string | description: Item price **before** catalog-defined discount. Defaults to `price` when not provided.
        - name: quantityAvailable | type: integer | description: Item quantity available for purchase. Only return this if inventory is managed. Not returning this field means that the buyer can "infinitely" tick up the number of items in the cart.
        - name: physicalProperties | type: PhysicalProperties | description: Physical properties of the item.
        - name: paymentOption | type: PaymentOptionType | description: Type of selected payment option for current item. Defaults to `FULL_PAYMENT_ONLINE`.  + `FULL_PAYMENT_ONLINE` - Entire payment for this item happens as part of the checkout. + `FULL_PAYMENT_OFFLINE` - Entire payment for this item happens after the checkout. For example, when using cash, check, or other offline payment methods. + `MEMBERSHIP` - Payment for this item is done by charging a membership. When this option is used, `lineItem.price.amount` is 0. + `DEPOSIT_ONLINE` -  Partial payment for the given item to be paid upfront during the checkout. Amount to be paid is defined by deposit_amount field.
             - enum:
             -     FULL_PAYMENT_ONLINE: The entire payment for this item happens as part of the checkout.
             -     FULL_PAYMENT_OFFLINE: The entire payment for this item happens after checkout. For example, when using cash, check, or other offline payment methods.
             -     MEMBERSHIP: Payment for this item is done by charging a membership. Any remaining amount not covered by the membership, such as item modifiers, is paid online.
             -     DEPOSIT_ONLINE: Partial payment to be paid upfront during checkout. The initial amount to be paid for each line item is specified in `depositAmount`.
             -     MEMBERSHIP_OFFLINE: Payment for this item can only be done by charging a membership and must be manually redeemed in the dashboard by the site admin. When selected, `price` is `0`.
             -     MEMBERSHIP_ONLINE_WITH_OFFLINE_REMAINDER: Item price is charged to online membership. Any remaining amount not covered by the membership, such as item modifiers, is paid offline.
        - name: serviceProperties | type: ServiceProperties | description: Service properties. When relevant, this contains information such as date and number of participants. Used, among other things, when checking for valid memberships.
           - name: scheduledDate | type: Date | description: Date and time the service is to be provided, in [ISO-8601](https://en.wikipedia.org/wiki/ISO_8601#Combined_date_and_time_representations) format. For example, the start time of a class.
           - name: numberOfParticipants | type: integer | description: The number of people participating in the service. For example, the number of people attending a class or the number of people per hotel room.
        - name: rootCatalogItemId | type: string | description: In cases where `catalogReference.catalogItemId` is NOT the actual catalog item GUID, this field will return the true item's GUID.  + For example, for Wix Bookings, `catalogReference.catalogItemId` is the booking GUID. Therefore this value is set to the service GUID. + In most cases, this field is the same as `catalogReference.catalogItemId`. + Used in membership validation.
        - name: depositAmount | type: string | description: Partial payment for the given item to be paid upfront during the checkout.  Eligible for catalog items with type `DEPOSIT_ONLINE`. When omitted, the item's price will not be split and is expected to be paid in a single installment.
        - name: deliveryProfileId | type: string | description: Delivery profile GUID.
        - name: catalogReference | type: CatalogReference | description: Catalog and item reference. Includes GUIDs for the item and the catalog it came from, as well as further optional info. Optional for custom line items, which don't trigger the Catalog service plugin.
        - name: priceUndetermined | type: boolean | description: Whether the price is not yet defined, and will be updated after the order is created.  Default: `false`
        - name: fixedQuantity | type: boolean | description: Whether the line item quantity is fixed and cannot be changed.  Default: `false`
        - name: consentRequiredPaymentPolicy | type: string | description: Item payment policy that requires customer consent to complete purchase. The payment policy will be displayed on the checkout page.
        - name: savePaymentMethod | type: boolean | description: Whether to save the payment method on the order.  Default: `false`
        - name: policies | type: array<Policy> | description: Policies to be displayed to the customer on the checkout page.
           - name: title | type: string | description: Policy title - should be translated
           - name: content | type: string | description: Policy content - should be translated
        - name: membersOnly | type: boolean | description: Whether the item can only be purchased by site members.  Default: `false`
        - name: taxableAddress | type: TaxableAddress | description: Address to use for tax calculation purposes.
           - ONE-OF:
              - name: addressType | type: TaxableAddressType | description: taxable address type. if this field is selected, the address is automatically resolved, and the tax is calculated accordingly.
                     - enum: BUSINESS, BILLING, SHIPPING
        - name: modifierGroups | type: array<ModifierGroup> | description: Modifier groups that were added to the item.
           - name: _id | type: string | description: Modifier group GUID.
           - name: name | type: TranslatableString | description: Modifier group name.
              - name: original | type: string | description: __Required.__ String in the site's default language as defined in the [request envelope](https://dev.wix.com/docs/build-apps/develop-your-app/frameworks/self-hosting/supported-extensions/backend-extensions/add-self-hosted-service-plugin-extensions.md#request-envelope).  Min: 1 character. Max: 200 characters.
              - name: translated | type: string | description: String translated into the buyer's language.  Min: 1 character. Max: 400 characters. Default: Same as `original`.
           - name: modifiers | type: array<ItemModifier> | description: List of modifiers in this group.
              - name: _id | type: string | description: Modifier GUID.
              - name: quantity | type: integer | description: The quantity of this modifier.
              - name: label | type: TranslatableString | description: Primary display label for the modifier.
              - name: details | type: TranslatableString | description: Additional details.
              - name: price | type: string | description: The price of the modifier.
     - name: couponCode | type: string | description: Coupon code.  Note that a checkout can only hold one `couponCode` at a time. If an additional `couponCode` is added, it will override the existing `couponCode`. For additional information, see the Coupons API.
     - name: customContentReference | type: CustomContentReference | description: Reference GUIDs for the app and component providing custom checkout page content.  To access and manage custom checkout page content, your app must have the permission scope named "Manage eCommerce - Admin Permissions". Learn more about [permission scopes](https://dev.wix.com/docs/build-apps/develop-your-app/access/authorization/about-permissions.md).
        - name: appId | type: string | description: GUID of the app providing the content.  You can get your app's GUID from its page in the [app dashboard](https://dev.wix.com/dc3/my-apps/).
        - name: componentId | type: string | description: GUID of the component within the app it belongs to.  You can get your component's GUID from its page in the [app dashboard](https://dev.wix.com/dc3/my-apps/).
     - name: externalReference | type: ExternalReference | description: References to an external app and resource associated with the checkout. Used for integration and tracking across different platforms.
        - name: appId | type: string | description: GUID of the app associated with the purchase flow. For example, the Wix Pay Links app GUID.
        - name: resourceId | type: string | description: Reference to an external resource GUID. Used to link the purchase flow to a specific entity in an external system. For example, a Wix Pay Link GUID.
  - name: metadata | type: EventMetadata | description: none
     - name: instanceId | type: string | description: App instance GUID.
     - name: eventType | type: string | description: Event type.
     - name: identity | type: IdentificationData | description: The identification type and identity data.
        - ONE-OF:
           - name: anonymousVisitorId | type: string | description: GUID of a site visitor that has not logged in to the site.
           - name: memberId | type: string | description: GUID of a site visitor that has logged in to the site.
           - name: wixUserId | type: string | description: GUID of a Wix user (site owner, contributor, etc.).
           - name: appId | type: string | description: GUID of an app.
        - name: identityType | type: WebhookIdentityType | description: 
             - enum: UNKNOWN, ANONYMOUS_VISITOR, MEMBER, WIX_USER, APP
     - name: accountInfo | type: AccountInfo | description: Details related to the account
        - name: accountId | type: string | description: GUID of the Wix account associated with the event.
        - name: parentAccountId | type: string | description: GUID of the parent Wix account. Only included when accountId belongs to a child account.
        - name: siteId | type: string | description: GUID of the Wix site associated with the event. Only included when the event is tied to a specific site.
     - name: _id | type: string | description: Event GUID. With this GUID you can easily spot duplicated events and ignore them.
     - name: entityFqdn | type: string | description: Fully Qualified Domain Name of an entity. This is a unique identifier assigned to the API main business entities. For example, `wix.stores.catalog.product`, `wix.bookings.session`, `wix.payments.transaction`.
     - name: slug | type: string | description: Event action name, placed at the top level to make it easier for users to dispatch messages. For example: `created`/`updated`/`deleted`/`started`/`completed`/`email_opened`.
     - name: entityId | type: string | description: GUID of the entity associated with the event.
     - name: eventTime | type: Date | description: Event timestamp in [ISO-8601](https://en.wikipedia.org/wiki/ISO_8601) format and UTC time. For example, `2020-04-26T13:57:50.699Z`.
     - name: triggeredByAnonymizeRequest | type: boolean | description: Whether the event was triggered as a result of a privacy regulation application (for example, GDPR).
     - name: originatedFrom | type: string | description: If present, indicates the action that triggered the event.
     - name: entityEventSequence | type: string | description: A sequence number that indicates the order of updates to an entity. For example, if an entity was updated at 16:00 and then again at 16:01, the second update will always have a higher sequence number. You can use this number to make sure you're handling updates in the right order. Just save the latest sequence number on your end and compare it to the one in each new message. If the new message has an older (lower) number, you can safely ignore it.

```

### Examples


```javascript
import { checkoutTemplates } from '@wix/ecom';

checkoutTemplates.onCheckoutTemplateUpdated((event) => {
    // handle your event here
});
```


```javascript
import { createClient, AppStrategy } from '@wix/sdk';
import { checkoutTemplates } from '@wix/ecom';

const wixClient = createClient({
  auth: AppStrategy({
    appId: 'MY-APP-ID',
    publicKey: 'YOUR_APP_PUBLIC_KEY',
  }),
  modules: {
      checkoutTemplates,
    },
});

wixClient.checkoutTemplates.onCheckoutTemplateUpdated((event) => {
    // handle your event here
});
```

---