Choose a version:

StandardApi

Requires access to protected customer data for some properties.

This base API object is provided to all extension targets.

Anchor to propertiesProperties

See examples for more information on how to use the API.

Anchor to analytics analytics required: Methods for interacting with Web Pixels, such as emitting an event.
Anchor to appliedGiftCards appliedGiftCards StatefulRemoteSubscribable<[]> required: Gift Cards that have been applied to the checkout.
Anchor to appMetafields appMetafields StatefulRemoteSubscribable<[]> required: The metafields requested in the shopify.extension.toml file. These metafields are updated when there's a change in the merchandise items being purchased by the customer.

Requires access to protected customer data.

Tip
Cart metafields are only available on carts created via the Storefront API version 2023-04 or later.*
Tip: Cart metafields are only available on carts created via the Storefront API version <code>2023-04</code> or later.*
Anchor to attributes attributes StatefulRemoteSubscribable<[] | undefined> required: Custom attributes left by the customer to the merchant, either in their cart or during checkout.
Anchor to availablePaymentOptions availablePaymentOptions StatefulRemoteSubscribable<[]> required: All available payment options.
Anchor to buyerJourney buyerJourney required: Provides details on the buyer's progression through the checkout.

See buyer journey examples for more information.
Anchor to checkoutSettings checkoutSettings StatefulRemoteSubscribable<> required: Settings applied to the buyer's checkout.
Anchor to cost cost required: Details on the costs the buyer will pay for this checkout.
Anchor to deliveryGroups deliveryGroups StatefulRemoteSubscribable<[]> required: A list of delivery groups containing information about the delivery of the items the customer intends to purchase.
Anchor to discountCodes discountCodes StatefulRemoteSubscribable<[]> required: A list of discount codes currently applied to the checkout.
Anchor to discountAllocations discountAllocations StatefulRemoteSubscribable<[]> required: Discounts that have been applied to the entire cart.
Anchor to extension extension <Target> required: Meta information about the extension.
Anchor to i18n i18n required: Utilities for translating content and formatting values according to the current localization of the checkout.

See localization examples for more information.
Anchor to lines lines StatefulRemoteSubscribable<[]> required: A list of lines containing information about the items the customer intends to purchase.
Anchor to localization localization required: Details about the location, language, and currency of the buyer. For utilities to easily format and translate content based on these details, you can use the i18n object instead.
Anchor to metafields metafields StatefulRemoteSubscribable<[]> required: The metafields that apply to the current checkout.

Metafields are stored locally on the client and are applied to the order object after the checkout completes.

These metafields are shared by all extensions running on checkout, and persist for as long as the customer is working on this checkout.

Once the order is created, you can query these metafields using the GraphQL Admin API
Anchor to note note StatefulRemoteSubscribable<string | undefined> required: A note left by the customer to the merchant, either in their cart or during checkout.
Anchor to query query <Data = unknown, Variables = { [key: string]: unknown; }>(query: string, options?: { variables?: Variables; version?: ; }) => Promise<{ data?: Data; errors?: GraphQLError[]; }> required: Used to query the Storefront GraphQL API with a prefetched token.

See storefront api access examples for more information.
Anchor to selectedPaymentOptions selectedPaymentOptions StatefulRemoteSubscribable<[]> required: Payment options selected by the buyer.
Anchor to sessionToken sessionToken required: Provides access to session tokens, which can be used to verify token claims on your app's server.

See session token examples for more information.
Anchor to settings settings StatefulRemoteSubscribable<> required: The settings matching the settings definition written in the shopify.extension.toml file.

See settings examples for more information.

Note
When an extension is being installed in the editor, the settings will be empty until a merchant sets a value. In that case, this object will be updated in real time as a merchant fills in the settings.
Note: When an extension is being installed in the editor, the settings will be empty until a merchant sets a value. In that case, this object will be updated in real time as a merchant fills in the settings.
Anchor to shop shop required: Shop where the checkout is taking place.
Anchor to storage storage required: Key-value storage for the extension target.
Anchor to ui ui required: Methods to interact with the extension's UI.
Anchor to version version required: The renderer version being used for the extension.
Anchor to buyerIdentity buyerIdentity: Information about the buyer that is interacting with the checkout.

Requires access to protected customer data.
Anchor to shippingAddress shippingAddress StatefulRemoteSubscribable< | undefined>: The proposed buyer shipping address. During the information step, the address updates when the field is committed (on change) rather than every keystroke. An address value is only present if delivery is required. Otherwise, the subscribable value is undefined.

Requires access to protected customer data.
Anchor to extensionPoint extensionPoint Target required: The identifier that specifies where in Shopify’s UI your code is being injected. This will be one of the targets you have included in your extension’s configuration file.

Deprecated
Deprecated as of version 2023-07, use extension.target instead.

Analytics

publish
Publish method to emit analytics events to [Web Pixels](/docs/apps/marketing).
```
(name: string, data: { [key: string]: unknown; }) => Promise<boolean>
```

export interface Analytics {
  /**
   * Publish method to emit analytics events to [Web Pixels](/docs/apps/marketing).
   */
  publish(name: string, data: {[key: string]: unknown}): Promise<boolean>;
}

AppliedGiftCard

lastCharacters
The last four characters of the applied gift card's code.
```
string
```
amountUsed
The amount of the applied gift card that will be used when the checkout is completed.
```
Money
```
balance
The current balance of the applied gift card prior to checkout completion.
```
Money
```

export interface AppliedGiftCard {
  /**
   * The last four characters of the applied gift card's code.
   */
  lastCharacters: string;

  /**
   * The amount of the applied gift card that will be used when the checkout is completed.
   */
  amountUsed: Money;

  /**
   * The current balance of the applied gift card prior to checkout completion.
   */
  balance: Money;
}

Money

amount
The price amount.
```
number
```
currencyCode
The ISO 4217 format for the currency.
```
CurrencyCode
```

export interface Money {
  /**
   * The price amount.
   */
  amount: number;
  /**
   * The ISO 4217 format for the currency.
   * @example 'CAD' for Canadian dollar
   */
  currencyCode: CurrencyCode;
}

CurrencyCode

'AED' | 'AFN' | 'ALL' | 'AMD' | 'ANG' | 'AOA' | 'ARS' | 'AUD' | 'AWG' | 'AZN' | 'BAM' | 'BBD' | 'BDT' | 'BGN' | 'BHD' | 'BIF' | 'BMD' | 'BND' | 'BOB' | 'BOV' | 'BRL' | 'BSD' | 'BTN' | 'BWP' | 'BYN' | 'BZD' | 'CAD' | 'CDF' | 'CHE' | 'CHF' | 'CHW' | 'CLF' | 'CLP' | 'CNY' | 'COP' | 'COU' | 'CRC' | 'CUC' | 'CUP' | 'CVE' | 'CZK' | 'DJF' | 'DKK' | 'DOP' | 'DZD' | 'EGP' | 'ERN' | 'ETB' | 'EUR' | 'FJD' | 'FKP' | 'GBP' | 'GEL' | 'GHS' | 'GIP' | 'GMD' | 'GNF' | 'GTQ' | 'GYD' | 'HKD' | 'HNL' | 'HRK' | 'HTG' | 'HUF' | 'IDR' | 'ILS' | 'INR' | 'IQD' | 'IRR' | 'ISK' | 'JMD' | 'JOD' | 'JPY' | 'KES' | 'KGS' | 'KHR' | 'KMF' | 'KPW' | 'KRW' | 'KWD' | 'KYD' | 'KZT' | 'LAK' | 'LBP' | 'LKR' | 'LRD' | 'LSL' | 'LYD' | 'MAD' | 'MDL' | 'MGA' | 'MKD' | 'MMK' | 'MNT' | 'MOP' | 'MRU' | 'MUR' | 'MVR' | 'MWK' | 'MXN' | 'MXV' | 'MYR' | 'MZN' | 'NAD' | 'NGN' | 'NIO' | 'NOK' | 'NPR' | 'NZD' | 'OMR' | 'PAB' | 'PEN' | 'PGK' | 'PHP' | 'PKR' | 'PLN' | 'PYG' | 'QAR' | 'RON' | 'RSD' | 'RUB' | 'RWF' | 'SAR' | 'SBD' | 'SCR' | 'SDG' | 'SEK' | 'SGD' | 'SHP' | 'SLL' | 'SOS' | 'SRD' | 'SSP' | 'STN' | 'SVC' | 'SYP' | 'SZL' | 'THB' | 'TJS' | 'TMT' | 'TND' | 'TOP' | 'TRY' | 'TTD' | 'TWD' | 'TZS' | 'UAH' | 'UGX' | 'USD' | 'USN' | 'UYI' | 'UYU' | 'UYW' | 'UZS' | 'VES' | 'VND' | 'VUV' | 'WST' | 'XAF' | 'XAG' | 'XAU' | 'XBA' | 'XBB' | 'XBC' | 'XBD' | 'XCD' | 'XDR' | 'XOF' | 'XPD' | 'XPF' | 'XPT' | 'XSU' | 'XTS' | 'XUA' | 'XXX' | 'YER' | 'ZAR' | 'ZMW' | 'ZWL'

AppMetafieldEntry

A metafield associated with the shop or a resource on the checkout.

target
The target that is associated to the metadata. {% include /apps/checkout/privacy-icon.md %} Requires access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data) when the type is `customer`, `company` or `companyLocation`.
```
AppMetafieldEntryTarget
```
metafield
The metadata information.
```
AppMetafield
```

export interface AppMetafieldEntry {
  /**
   * The target that is associated to the metadata.
   *
   * {% include /apps/checkout/privacy-icon.md %} Requires access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data) when the type is `customer`, `company` or `companyLocation`.
   */
  target: AppMetafieldEntryTarget;

  /** The metadata information. */
  metafield: AppMetafield;
}

AppMetafieldEntryTarget

The metafield owner.

type
The type of the metafield owner. {% include /apps/checkout/privacy-icon.md %} Requires access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data) when the type is `customer`, `company` or `companyLocation`.
```
"cart" | "shop" | "customer" | "product" | "variant" | "company" | "companyLocation"
```
id
The numeric owner ID that is associated with the metafield.
```
string
```

export interface AppMetafieldEntryTarget {
  /**
   * The type of the metafield owner.
   *
   * {% include /apps/checkout/privacy-icon.md %} Requires access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data) when the type is `customer`, `company` or `companyLocation`.
   */
  type:
    | 'customer'
    | 'product'
    | 'shop'
    | 'variant'
    | 'company'
    | 'companyLocation'
    | 'cart';

  /** The numeric owner ID that is associated with the metafield. */
  id: string;
}

AppMetafield

Represents a custom metadata attached to a resource.

key
The key name of a metafield.
```
string
```
namespace
The namespace for a metafield.
```
string
```
value
The value of a metafield.
```
string | number | boolean
```

valueType

The metafield’s information type.

"string" | "boolean" | "integer" | "json_string" | "float"

type
The metafield's type name.
```
string
```

export interface AppMetafield {
  /** The key name of a metafield. */
  key: string;

  /** The namespace for a metafield. */
  namespace: string;

  /** The value of a metafield. */
  value: string | number | boolean;

  /** The metafield’s information type. */
  valueType: 'boolean' | 'float' | 'integer' | 'json_string' | 'string';

  /** The metafield's type name. */
  type: string;
}

Attribute

key
The key for the attribute.
```
string
```
value
The value for the attribute.
```
string
```

export interface Attribute {
  /**
   * The key for the attribute.
   */
  key: string;

  /**
   * The value for the attribute.
   */
  value: string;
}

PaymentOption

A payment option presented to the buyer.

type
The type of the payment option. Shops can be configured to support many different payment options. Some options are only available to buyers in specific regions. | Type | Description | |---|---| | `creditCard` | A vaulted or manually entered credit card. | | `deferred` | A [deferred payment](https://help.shopify.com/en/manual/orders/deferred-payments), such as invoicing the buyer and collecting payment at a later time. | | `local` | A [local payment option](https://help.shopify.com/en/manual/payments/shopify-payments/local-payment-methods) specific to the current region or market | | `manualPayment` | A manual payment option such as an in-person retail transaction. | | `offsite` | A payment processed outside of Shopify's checkout, excluding integrated wallets. | | `other` | Another type of payment not defined here. | | `paymentOnDelivery` | A payment that will be collected on delivery. | | `redeemable` | A redeemable payment option such as a gift card or store credit. | | `wallet` | An integrated wallet such as PayPal, Google Pay, Apple Pay, etc. | | `customOnsite` | A custom payment option that is processed through a checkout extension with a payments app. |
```
"creditCard" | "deferred" | "local" | "manualPayment" | "offsite" | "other" | "paymentOnDelivery" | "redeemable" | "wallet" | "customOnsite"
```
handle
The unique handle for the payment option. This is not a globally unique identifier. It may be an identifier specific to the given checkout session or the current shop.
```
string
```

export interface PaymentOption {
  /**
   * The type of the payment option.
   *
   * Shops can be configured to support many different payment options. Some options are only available to buyers in specific regions.
   *
   * | Type  | Description  |
   * |---|---|
   * | `creditCard`  |  A vaulted or manually entered credit card.  |
   * | `deferred`  |  A [deferred payment](https://help.shopify.com/en/manual/orders/deferred-payments), such as invoicing the buyer and collecting payment at a later time.  |
   * | `local`  |  A [local payment option](https://help.shopify.com/en/manual/payments/shopify-payments/local-payment-methods) specific to the current region or market  |
   * | `manualPayment`  |  A manual payment option such as an in-person retail transaction.  |
   * | `offsite`  |  A payment processed outside of Shopify's checkout, excluding integrated wallets.  |
   * | `other`  |  Another type of payment not defined here.  |
   * | `paymentOnDelivery`  |  A payment that will be collected on delivery.  |
   * | `redeemable`  |  A redeemable payment option such as a gift card or store credit.  |
   * | `wallet`  |  An integrated wallet such as PayPal, Google Pay, Apple Pay, etc.  |
   * | `customOnsite` | A custom payment option that is processed through a checkout extension with a payments app. |
   */
  type:
    | 'creditCard'
    | 'deferred'
    | 'local'
    | 'manualPayment'
    | 'offsite'
    | 'other'
    | 'paymentOnDelivery'
    | 'redeemable'
    | 'wallet'
    | 'customOnsite';

  /**
   * The unique handle for the payment option.
   *
   * This is not a globally unique identifier. It may be an identifier specific to the given checkout session or the current shop.
   */
  handle: string;
}

BuyerIdentity

customer
The buyer's customer account. The value is undefined if the buyer isn’t a known customer for this shop or if they haven't logged in yet. {% include /apps/checkout/privacy-icon.md %} Requires access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
```
StatefulRemoteSubscribable<Customer | undefined>
```
email
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. {% include /apps/checkout/privacy-icon.md %} Requires level 2 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
```
StatefulRemoteSubscribable<string | undefined>
```
phone
The phone number of the buyer that is interacting with the cart. The value is `undefined` if the app does not have access to customer data. {% include /apps/checkout/privacy-icon.md %} Requires level 2 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
```
StatefulRemoteSubscribable<string | undefined>
```
purchasingCompany
Provides details of the company and the company location that the business customer is purchasing on behalf of. This includes information that can be used to identify the company and the company location that the business customer belongs to. {% include /apps/checkout/privacy-icon.md %} Requires access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
```
StatefulRemoteSubscribable<PurchasingCompany | undefined>
```

export interface BuyerIdentity {
  /**
   * The buyer's customer account. The value is undefined if the buyer isn’t a
   * known customer for this shop or if they haven't logged in yet.
   *
   * {% include /apps/checkout/privacy-icon.md %} Requires access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
   */
  customer: StatefulRemoteSubscribable<Customer | undefined>;

  /**
   * 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.
   *
   * {% include /apps/checkout/privacy-icon.md %} Requires level 2 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
   */
  email: StatefulRemoteSubscribable<string | undefined>;

  /**
   * The phone number of the buyer that is interacting with the cart.
   * The value is `undefined` if the app does not have access to customer data.
   *
   * {% include /apps/checkout/privacy-icon.md %} Requires level 2 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
   */
  phone: StatefulRemoteSubscribable<string | undefined>;

  /**
   * Provides details of the company and the company location that the business customer is purchasing on behalf of.
   * This includes information that can be used to identify the company and the company location that the business
   * customer belongs to.
   *
   * {% include /apps/checkout/privacy-icon.md %} Requires access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
   */
  purchasingCompany: StatefulRemoteSubscribable<PurchasingCompany | undefined>;
}

Customer

Information about a customer who has previously purchased from this shop. {% include /apps/checkout/privacy-icon.md %} Requires access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).

id
Customer ID. {% include /apps/checkout/privacy-icon.md %} Requires level 1 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
```
string
```
email
The email of the customer. {% include /apps/checkout/privacy-icon.md %} Requires level 2 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
```
string
```
phone
The phone number of the customer. {% include /apps/checkout/privacy-icon.md %} Requires level 2 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
```
string
```
fullName
The full name of the customer. {% include /apps/checkout/privacy-icon.md %} Requires level 2 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
```
string
```
firstName
The first name of the customer. {% include /apps/checkout/privacy-icon.md %} Requires level 2 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
```
string
```
lastName
The last name of the customer. {% include /apps/checkout/privacy-icon.md %} Requires level 2 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
```
string
```
image
The image associated with the customer. {% include /apps/checkout/privacy-icon.md %} Requires level 1 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
```
ImageDetails
```
acceptsMarketing
Defines if the customer accepts marketing activities.
```
boolean
```
storeCreditAccounts
The Store Credit Accounts owned by the customer and usable during the checkout process. {% include /apps/checkout/privacy-icon.md %} Requires level 1 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
```
StoreCreditAccount[]
```

export interface Customer {
  /**
   * Customer ID.
   *
   * {% include /apps/checkout/privacy-icon.md %} Requires level 1 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
   *
   * @example 'gid://shopify/Customer/123'
   */
  id: string;
  /**
   * The email of the customer.
   *
   * {% include /apps/checkout/privacy-icon.md %} Requires level 2 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
   */
  email?: string;
  /**
   * The phone number of the customer.
   *
   * {% include /apps/checkout/privacy-icon.md %} Requires level 2 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
   */
  phone?: string;
  /**
   * The full name of the customer.
   *
   * {% include /apps/checkout/privacy-icon.md %} Requires level 2 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
   */
  fullName?: string;
  /**
   * The first name of the customer.
   *
   * {% include /apps/checkout/privacy-icon.md %} Requires level 2 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
   */
  firstName?: string;
  /**
   * The last name of the customer.
   *
   * {% include /apps/checkout/privacy-icon.md %} Requires level 2 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
   */
  lastName?: string;
  /**
   * The image associated with the customer.
   *
   * {% include /apps/checkout/privacy-icon.md %} Requires level 1 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
   */
  image: ImageDetails;
  /**
   * Defines if the customer accepts marketing activities.
   */
  acceptsMarketing: boolean;
  /**
   * The Store Credit Accounts owned by the customer and usable during the checkout process.
   *
   * {% include /apps/checkout/privacy-icon.md %} Requires level 1 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
   *
   * @private
   */
  storeCreditAccounts: StoreCreditAccount[];
}

ImageDetails

url
The image URL.
```
string
```
altText
The alternative text for the image.
```
string
```

export interface ImageDetails {
  /**
   * The image URL.
   */
  url: string;

  /**
   * The alternative text for the image.
   */
  altText?: string;
}

PurchasingCompany

Information about a company that the business customer is purchasing on behalf of.

company
Includes information of the company that the business customer is purchasing on behalf of. {% include /apps/checkout/privacy-icon.md %} Requires access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
```
Company
```
location
Includes information of the company location that the business customer is purchasing on behalf of. {% include /apps/checkout/privacy-icon.md %} Requires access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
```
CompanyLocation
```

export interface PurchasingCompany {
  /**
   * Includes information of the company that the business customer is purchasing on behalf of.
   *
   * {% include /apps/checkout/privacy-icon.md %} Requires access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
   */
  company: Company;
  /**
   * Includes information of the company location that the business customer is purchasing on behalf of.
   *
   * {% include /apps/checkout/privacy-icon.md %} Requires access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
   */
  location: CompanyLocation;
}

Company

id
The company ID. {% include /apps/checkout/privacy-icon.md %} Requires level 1 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
```
string
```
name
The name of the company. {% include /apps/checkout/privacy-icon.md %} Requires level 1 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
```
string
```
externalId
The external ID of the company that can be set by the merchant. {% include /apps/checkout/privacy-icon.md %} Requires level 1 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
```
string
```

export interface Company {
  /**
   * The company ID.
   *
   * {% include /apps/checkout/privacy-icon.md %} Requires level 1 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
   */
  id: string;
  /**
   * The name of the company.
   *
   * {% include /apps/checkout/privacy-icon.md %} Requires level 1 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
   */
  name: string;
  /**
   * The external ID of the company that can be set by the merchant.
   *
   * {% include /apps/checkout/privacy-icon.md %} Requires level 1 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
   */
  externalId?: string;
}

CompanyLocation

id
The company location ID. {% include /apps/checkout/privacy-icon.md %} Requires level 1 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
```
string
```
name
The name of the company location. {% include /apps/checkout/privacy-icon.md %} Requires level 1 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
```
string
```
externalId
The external ID of the company location that can be set by the merchant. {% include /apps/checkout/privacy-icon.md %} Requires level 1 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
```
string
```

export interface CompanyLocation {
  /**
   * The company location ID.
   *
   * {% include /apps/checkout/privacy-icon.md %} Requires level 1 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
   */
  id: string;
  /**
   * The name of the company location.
   *
   * {% include /apps/checkout/privacy-icon.md %} Requires level 1 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
   */
  name: string;
  /**
   * The external ID of the company location that can be set by the merchant.
   *
   * {% include /apps/checkout/privacy-icon.md %} Requires level 1 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
   */
  externalId?: string;
}

BuyerJourney

Provides details on the buyer's progression through the checkout.

intercept
Installs a function for intercepting and preventing progress on checkout. This returns a promise that resolves to a teardown function. Calling the teardown function will remove the interceptor. To block checkout progress, you must set the [block_progress](/docs/api/checkout-ui-extensions/configuration#block-progress) capability in your extension's configuration.
```
(interceptor: Interceptor) => Promise<() => void>
```
completed
This subscribable value will be true if the buyer completed submitting their order. For example, when viewing the **Order status** page after submitting payment, the buyer will have completed their order.
```
StatefulRemoteSubscribable<boolean>
```

export interface BuyerJourney {
  /**
   * Installs a function for intercepting and preventing progress on checkout.
   *
   * This returns a promise that resolves to a teardown function. Calling the
   * teardown function will remove the interceptor.
   *
   * To block checkout progress, you must set the [block_progress](/docs/api/checkout-ui-extensions/configuration#block-progress)
   * capability in your extension's configuration.
   */
  intercept(interceptor: Interceptor): Promise<() => void>;

  /**
   * This subscribable value will be true if the buyer completed submitting their order.
   *
   * For example, when viewing the **Order status** page after submitting payment, the buyer will have completed their order.
   */
  completed: StatefulRemoteSubscribable<boolean>;
}

Interceptor

A function for intercepting and preventing navigation on checkout. You can block navigation by returning an object with `{behavior: 'block', reason: InvalidResultReason.InvalidExtensionState, errors?: ValidationErrors[]}`. If you do, then you're expected to also update some part of your UI to reflect the reason why navigation was blocked, either by targeting checkout UI fields, passing errors to the page level or rendering the errors in your extension.

(
  interceptorProps: InterceptorProps,
) => InterceptorRequest | Promise<InterceptorRequest>

InterceptorProps

canBlockProgress
Whether the interceptor has the capability to block a buyer's progress through checkout. This ability might be granted by a merchant in differing checkout contexts.
```
boolean
```

export interface InterceptorProps {
  /**
   * Whether the interceptor has the capability to block a buyer's progress through
   * checkout. This ability might be granted by a merchant in differing checkout contexts.
   */
  canBlockProgress: boolean;
}

InterceptorRequest

InterceptorRequestAllow | InterceptorRequestBlock

InterceptorRequestAllow

behavior
Indicates that the interceptor will allow the buyer's journey to continue.
```
"allow"
```
perform
This callback is called when all interceptors finish. We recommend setting errors or reasons for blocking at this stage, so that all the errors in the UI show up at once.
```
(result: InterceptorResult) => void | Promise<void>
```

interface InterceptorRequestAllow {
  /**
   * Indicates that the interceptor will allow the buyer's journey to continue.
   */
  behavior: 'allow';

  /**
   * This callback is called when all interceptors finish. We recommend
   * setting errors or reasons for blocking at this stage, so that all the errors in
   * the UI show up at once.
   * @param result InterceptorResult with behavior as either 'allow' or 'block'
   */
  perform?(result: InterceptorResult): void | Promise<void>;
}

InterceptorResult

InterceptorResultAllow | InterceptorResultBlock

InterceptorResultAllow

behavior
Indicates that the buyer was allowed to progress through checkout.
```
"allow"
```

interface InterceptorResultAllow {
  /**
   * Indicates that the buyer was allowed to progress through checkout.
   */
  behavior: 'allow';
}

InterceptorResultBlock

behavior
Indicates that some part of the checkout UI intercepted and prevented the buyer’s progress. The buyer typically needs to take some action to resolve this issue and to move on to the next step.
```
"block"
```

interface InterceptorResultBlock {
  /**
   * Indicates that some part of the checkout UI intercepted and prevented
   * the buyer’s progress. The buyer typically needs to take some action
   * to resolve this issue and to move on to the next step.
   */
  behavior: 'block';
}

InterceptorRequestBlock

behavior
Indicates that the interceptor will block the buyer's journey from continuing.
```
"block"
```
reason
The reason for blocking the interceptor request. This value isn't presented to the buyer, so it doesn't need to be localized. The value is used only for Shopify’s own internal debugging and metrics.
```
string
```
errors
Used to pass errors to the checkout UI, outside your extension's UI boundaries.
```
ValidationError[]
```
perform
This callback is called when all interceptors finish. We recommend setting errors or reasons for blocking at this stage, so that all the errors in the UI show up at once.
```
(result: InterceptorResult) => void | Promise<void>
```

interface InterceptorRequestBlock {
  /**
   * Indicates that the interceptor will block the buyer's journey from continuing.
   */
  behavior: 'block';

  /**
   * The reason for blocking the interceptor request. This value isn't presented to
   * the buyer, so it doesn't need to be localized. The value is used only for Shopify’s
   * own internal debugging and metrics.
   */
  reason: string;

  /**
   * Used to pass errors to the checkout UI, outside your extension's UI boundaries.
   */
  errors?: ValidationError[];

  /**
   * This callback is called when all interceptors finish. We recommend
   * setting errors or reasons for blocking at this stage, so that all the errors in
   * the UI show up at once.
   * @param result InterceptorResult with behavior as either 'allow' or 'block'
   */
  perform?(result: InterceptorResult): void | Promise<void>;
}

ValidationError

message
Error message to be displayed to the buyer.
```
string
```
target
The checkout UI field that the error is associated with. Example: `$.cart.deliveryGroups[0].deliveryAddress.countryCode` See the [supported targets](/docs/api/functions/reference/cart-checkout-validation/graphql#supported-targets) for more information.
```
string
```

export interface ValidationError {
  /**
   * Error message to be displayed to the buyer.
   */
  message: string;
  /**
   * The checkout UI field that the error is associated with.
   *
   * Example: `$.cart.deliveryGroups[0].deliveryAddress.countryCode`
   *
   * See the [supported targets](/docs/api/functions/reference/cart-checkout-validation/graphql#supported-targets)
   * for more information.
   */
  target?: string;
}

CheckoutSettings

Settings describing the behavior of the buyer's checkout.

orderSubmission
The type of order that will be created once the buyer completes checkout.
```
"DRAFT_ORDER" | "ORDER"
```
paymentTermsTemplate
Represents the merchant configured payment terms.
```
PaymentTermsTemplate
```
shippingAddress
Settings describing the behavior of the shipping address.
```
ShippingAddressSettings
```

export interface CheckoutSettings {
  /**
   * The type of order that will be created once the buyer completes checkout.
   */
  orderSubmission: 'DRAFT_ORDER' | 'ORDER';
  /**
   * Represents the merchant configured payment terms.
   */
  paymentTermsTemplate?: PaymentTermsTemplate;
  /**
   * Settings describing the behavior of the shipping address.
   */
  shippingAddress: ShippingAddressSettings;
}

PaymentTermsTemplate

Represents the payment terms template object.

id
A globally-unique ID.
```
string
```
name
The name of the payment terms translated to the buyer's current language. See [localization.language](/docs/api/checkout-ui-extensions/apis/standardapi#properties-propertydetail-localization).
```
string
```
dueDate
The due date for net payment terms as a ISO 8601 formatted string `YYYY-MM-DDTHH:mm:ss.sssZ`.
```
string
```
dueInDays
The number of days between the issued date and due date if using net payment terms.
```
number
```

export interface PaymentTermsTemplate {
  /**
   * A globally-unique ID.
   * @example 'gid://shopify/PaymentTermsTemplate/1'
   */
  id: string;
  /**
   * The name of the payment terms translated to the buyer's current language. See [localization.language](/docs/api/checkout-ui-extensions/apis/standardapi#properties-propertydetail-localization).
   */
  name: string;
  /**
   * The due date for net payment terms as a ISO 8601 formatted string `YYYY-MM-DDTHH:mm:ss.sssZ`.
   */
  dueDate?: string;
  /**
   * The number of days between the issued date and due date if using net payment terms.
   */
  dueInDays?: number;
}

ShippingAddressSettings

Settings describing the behavior of the shipping address.

isEditable
Describes whether the buyer can ship to any address during checkout.
```
boolean
```

export interface ShippingAddressSettings {
  /**
   * Describes whether the buyer can ship to any address during checkout.
   */
  isEditable: boolean;
}

CartCost

totalAmount
A `Money` value representing the minimum a buyer can expect to pay at the current step of checkout. This value excludes amounts yet to be negotiated. For example, the information step might not have delivery costs calculated.
```
StatefulRemoteSubscribable<Money>
```

export interface CartCost {
  /**
   * A `Money` value representing the minimum a buyer can expect to pay at the current
   * step of checkout. This value excludes amounts yet to be negotiated. For example,
   * the information step might not have delivery costs calculated.
   */
  totalAmount: StatefulRemoteSubscribable<Money>;
}

DeliveryGroup

Represents the delivery information and options available for one or more cart lines.

targetedCartLines
The cart line references associated to the delivery group.
```
CartLineReference[]
```
deliveryOptions
The delivery options available for the delivery group.
```
DeliveryOption[]
```
selectedDeliveryOption
The selected delivery option for the delivery group.
```
DeliveryOptionReference
```
groupType
The type of the delivery group.
```
DeliveryGroupType
```
isDeliveryRequired
Whether delivery is required for the delivery group.
```
boolean
```

export interface DeliveryGroup {
  /**
   * The cart line references associated to the delivery group.
   */
  targetedCartLines: CartLineReference[];

  /**
   * The delivery options available for the delivery group.
   */
  deliveryOptions: DeliveryOption[];

  /**
   * The selected delivery option for the delivery group.
   */
  selectedDeliveryOption?: DeliveryOptionReference;

  /**
   * The type of the delivery group.
   */
  groupType: DeliveryGroupType;

  /**
   * Whether delivery is required for the delivery group.
   */
  isDeliveryRequired: boolean;
}

CartLineReference

Represents a reference to a cart line.

id
The unique identifier of the referenced cart line.
```
string
```

export interface CartLineReference {
  /**
   * The unique identifier of the referenced cart line.
   */
  id: string;
}

DeliveryOption

Represents a base interface for a single delivery option.

handle
The unique identifier of the delivery option.
```
string
```
title
The title of the delivery option.
```
string
```
description
The description of the delivery option.
```
string
```

export interface DeliveryOption {
  /**
   * The unique identifier of the delivery option.
   */
  handle: string;

  /**
   * The title of the delivery option.
   */
  title?: string;

  /**
   * The description of the delivery option.
   */
  description?: string;
}

DeliveryOptionReference

Represents a reference to a delivery option.

handle
The unique identifier of the referenced delivery option.
```
string
```

export interface DeliveryOptionReference {
  /**
   * The unique identifier of the referenced delivery option.
   */
  handle: string;
}

DeliveryGroupType

The possible types of a delivery group.

'oneTimePurchase' | 'subscription'

CartDiscountCode

code
The code for the discount
```
string
```

export interface CartDiscountCode {
  /**
   * The code for the discount
   */
  code: string;
}

CartDiscountAllocation

CartCodeDiscountAllocation | CartAutomaticDiscountAllocation | CartCustomDiscountAllocation

CartCodeDiscountAllocation

code
The code for the discount
```
string
```
type
The type of the code discount
```
"code"
```
discountedAmount
The money amount that has been discounted from the order
```
Money
```

export interface CartCodeDiscountAllocation extends CartDiscountAllocationBase {
  /**
   * The code for the discount
   */
  code: string;

  /**
   * The type of the code discount
   */
  type: 'code';
}

CartAutomaticDiscountAllocation

title
The title of the automatic discount
```
string
```
type
The type of the automatic discount
```
"automatic"
```
discountedAmount
The money amount that has been discounted from the order
```
Money
```

export interface CartAutomaticDiscountAllocation
  extends CartDiscountAllocationBase {
  /**
   * The title of the automatic discount
   */
  title: string;

  /**
   * The type of the automatic discount
   */
  type: 'automatic';
}

CartCustomDiscountAllocation

title
The title of the custom discount
```
string
```
type
The type of the custom discount
```
"custom"
```
discountedAmount
The money amount that has been discounted from the order
```
Money
```

export interface CartCustomDiscountAllocation
  extends CartDiscountAllocationBase {
  /**
   * The title of the custom discount
   */
  title: string;

  /**
   * The type of the custom discount
   */
  type: 'custom';
}

Extension

Meta information about an extension target.

apiVersion
The API version that was set in the extension config file.
```
ApiVersion
```
capabilities
The allowed capabilities of the extension, defined in your [shopify.extension.toml](/docs/api/checkout-ui-extensions/configuration) file. * [`api_access`](/docs/api/checkout-ui-extensions/configuration#api-access): the extension can access the Storefront API. * [`network_access`](/docs/api/checkout-ui-extensions/configuration#network-access): the extension can make external network calls. * [`block_progress`](/docs/api/checkout-ui-extensions/configuration#block-progress): the extension can block a buyer's progress and the merchant has allowed this blocking behavior.
```
StatefulRemoteSubscribable<Capability[]>
```
editor
Information about the editor where the extension is being rendered. The value is undefined if the extension is not rendering in an editor.
```
Editor
```
rendered
Whether your extension is currently rendered to the screen. Shopify might render your extension before it's visible in the UI, typically to pre-render extensions that will appear on a later step of the checkout. Your extension might also continue to run after the buyer has navigated away from where it was rendered. The extension continues running so that your extension is immediately available to render if the buyer navigates back.
```
StatefulRemoteSubscribable<boolean>
```
scriptUrl
The URL to the script that started the extension target.
```
string
```
target
The identifier that specifies where in Shopify’s UI your code is being injected. This will be one of the targets you have included in your extension’s configuration file.
```
Target
```
version
The published version of the running extension target. For unpublished extensions, the value is `undefined`.
```
string
```

export interface Extension<Target extends ExtensionTarget = ExtensionTarget> {
  /**
   * The API version that was set in the extension config file.
   *
   * @example '2023-04', '2023-07'
   */
  apiVersion: ApiVersion;

  /**
   * The allowed capabilities of the extension, defined
   * in your [shopify.extension.toml](/docs/api/checkout-ui-extensions/configuration) file.
   *
   * * [`api_access`](/docs/api/checkout-ui-extensions/configuration#api-access): the extension can access the Storefront API.
   *
   * * [`network_access`](/docs/api/checkout-ui-extensions/configuration#network-access): the extension can make external network calls.
   *
   * * [`block_progress`](/docs/api/checkout-ui-extensions/configuration#block-progress): the extension can block a buyer's progress and the merchant has allowed this blocking behavior.
   */
  capabilities: StatefulRemoteSubscribable<Capability[]>;

  /**
   * Information about the editor where the extension is being rendered.
   *
   * The value is undefined if the extension is not rendering in an editor.
   */
  editor?: Editor;

  /**
   * Whether your extension is currently rendered to the screen.
   *
   * Shopify might render your extension before it's visible in the UI,
   * typically to pre-render extensions that will appear on a later step of the
   * checkout.
   *
   * Your extension might also continue to run after the buyer has navigated away
   * from where it was rendered. The extension continues running so that
   * your extension is immediately available to render if the buyer navigates back.
   */
  rendered: StatefulRemoteSubscribable<boolean>;

  /**
   * The URL to the script that started the extension target.
   */
  scriptUrl: string;

  /**
   * The identifier that specifies where in Shopify’s UI your code is being
   * injected. This will be one of the targets you have included in your
   * extension’s configuration file.
   *
   * @example 'purchase.checkout.block.render'
   * @see /docs/api/checkout-ui-extensions/2023-07/extension-targets-overview
   * @see /docs/apps/app-extensions/configuration#targets
   */
  target: Target;

  /**
   * The published version of the running extension target.
   *
   * For unpublished extensions, the value is `undefined`.
   *
   * @example 3.0.10
   */
  version?: string;
}

ApiVersion

Union of supported API versions

'2023-04' | '2023-07' | 'unstable'

Capability

The capabilities an extension has access to. * [`api_access`](/docs/api/checkout-ui-extensions/configuration#api-access): the extension can access the Storefront API. * [`network_access`](/docs/api/checkout-ui-extensions/configuration#network-access): the extension can make external network calls. * [`block_progress`](/docs/api/checkout-ui-extensions/configuration#block-progress): the extension can block a buyer's progress and the merchant has allowed this blocking behavior.

'api_access' | 'network_access' | 'block_progress'

Editor

type
Indicates whether the extension is rendering in the checkout editor.
```
"checkout"
```

export interface Editor {
  /**
   * Indicates whether the extension is rendering in the checkout editor.
   */
  type: 'checkout';
}

I18n

formatNumber
Returns a localized number. This function behaves like the standard `Intl.NumberFormat()` with a style of `decimal` applied. It uses the buyer's locale by default.
```
(number: number | bigint, options?: { inExtensionLocale?: boolean; } & NumberFormatOptions) => string
```
formatCurrency
Returns a localized currency value. This function behaves like the standard `Intl.NumberFormat()` with a style of `currency` applied. It uses the buyer's locale by default.
```
(number: number | bigint, options?: { inExtensionLocale?: boolean; } & NumberFormatOptions) => string
```
formatDate
Returns a localized date value. This function behaves like the standard `Intl.DateTimeFormatOptions()` and uses the buyer's locale by default. Formatting options can be passed in as options.
```
(date: Date, options?: { inExtensionLocale?: boolean; } & DateTimeFormatOptions) => string
```
translate
Returns translated content in the buyer's locale, as supported by the extension. - `options.count` is a special numeric value used in pluralization. - The other option keys and values are treated as replacements for interpolation. - If the replacements are all primitives, then `translate()` returns a single string. - If replacements contain UI components, then `translate()` returns an array of elements.
```
I18nTranslate
```

export interface I18n {
  /**
   * Returns a localized number.
   *
   * This function behaves like the standard `Intl.NumberFormat()`
   * with a style of `decimal` applied. It uses the buyer's locale by default.
   *
   * @param options.inExtensionLocale - if true, use the extension's locale
   */
  formatNumber: (
    number: number | bigint,
    options?: {inExtensionLocale?: boolean} & Intl.NumberFormatOptions,
  ) => string;

  /**
   * Returns a localized currency value.
   *
   * This function behaves like the standard `Intl.NumberFormat()`
   * with a style of `currency` applied. It uses the buyer's locale by default.
   *
   * @param options.inExtensionLocale - if true, use the extension's locale
   */
  formatCurrency: (
    number: number | bigint,
    options?: {inExtensionLocale?: boolean} & Intl.NumberFormatOptions,
  ) => string;

  /**
   * Returns a localized date value.
   *
   * This function behaves like the standard `Intl.DateTimeFormatOptions()` and uses
   * the buyer's locale by default. Formatting options can be passed in as
   * options.
   *
   * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/DateTimeFormat0
   * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/DateTimeFormat#using_options
   *
   * @param options.inExtensionLocale - if true, use the extension's locale
   */
  formatDate: (
    date: Date,
    options?: {inExtensionLocale?: boolean} & Intl.DateTimeFormatOptions,
  ) => string;

  /**
   * Returns translated content in the buyer's locale,
   * as supported by the extension.
   *
   * - `options.count` is a special numeric value used in pluralization.
   * - The other option keys and values are treated as replacements for interpolation.
   * - If the replacements are all primitives, then `translate()` returns a single string.
   * - If replacements contain UI components, then `translate()` returns an array of elements.
   */
  translate: I18nTranslate;
}

I18nTranslate

This returns a translated string matching a key in a locale file.

export interface I18nTranslate {
  <ReplacementType = string>(
    key: string,
    options?: {[placeholderKey: string]: ReplacementType | string | number},
  ): ReplacementType extends string | number
    ? string
    : (string | ReplacementType)[];
}

CartLine

id
These line item IDs are not stable at the moment, they might change after any operations on the line items. You should always look up for an updated ID before any call to `applyCartLinesChange` because you'll need the ID to create a `CartLineChange` object.
```
string
```
merchandise
The merchandise being purchased.
```
Merchandise
```
quantity
The quantity of the merchandise being purchased.
```
number
```
cost
The details about the cost components attributed to the cart line.
```
CartLineCost
```
attributes
The line item additional custom attributes.
```
Attribute[]
```
discountAllocations
Discounts applied to the cart line.
```
CartDiscountAllocation[]
```
lineComponents
Sub lines of the merchandise line. If no sub lines are present, this will be an empty array.
```
CartBundleLineComponent[]
```

export interface CartLine {
  /**
   * These line item IDs are not stable at the moment, they might change after
   * any operations on the line items. You should always look up for an updated
   * ID before any call to `applyCartLinesChange` because you'll need the ID to
   * create a `CartLineChange` object.
   * @example 'gid://shopify/CartLine/123'
   */
  id: string;

  /**
   * The merchandise being purchased.
   */
  merchandise: Merchandise;

  /**
   * The quantity of the merchandise being purchased.
   */
  quantity: number;

  /**
   * The details about the cost components attributed to the cart line.
   */
  cost: CartLineCost;

  /**
   * The line item additional custom attributes.
   */
  attributes: Attribute[];

  /**
   * Discounts applied to the cart line.
   */
  discountAllocations: CartDiscountAllocation[];

  /**
   * Sub lines of the merchandise line. If no sub lines are present, this will be an empty array.
   */
  lineComponents: CartLineComponentType[];
}

Merchandise

type
```
"variant"
```
id
A globally-unique identifier.
```
string
```
title
The product variant’s title.
```
string
```
subtitle
The product variant's subtitle.
```
string
```
image
Image associated with the product variant. This field falls back to the product image if no image is available.
```
ImageDetails
```
selectedOptions
List of product options applied to the variant.
```
SelectedOption[]
```
product
The product object that the product variant belongs to.
```
Product
```
requiresShipping
Whether or not the product requires shipping.
```
boolean
```
sellingPlan
The selling plan associated with the merchandise.
```
SellingPlan
```

ProductVariant

SelectedOption

name
The name of the merchandise option.
```
string
```
value
The value of the merchandise option.
```
string
```

export interface SelectedOption {
  /**
   * The name of the merchandise option.
   */
  name: string;

  /**
   * The value of the merchandise option.
   */
  value: string;
}

Product

id
A globally-unique identifier.
```
string
```
vendor
The product’s vendor name.
```
string
```
productType
A categorization that a product can be tagged with, commonly used for filtering and searching.
```
string
```

export interface Product {
  /**
   * A globally-unique identifier.
   */
  id: string;

  /**
   * The product’s vendor name.
   */
  vendor: string;

  /**
   * A categorization that a product can be tagged with, commonly used for filtering and searching.
   */
  productType: string;
}

SellingPlan

id
A globally-unique identifier.
```
string
```

export interface SellingPlan {
  /**
   * A globally-unique identifier.
   * @example 'gid://shopify/SellingPlan/1'
   */
  id: string;
}

CartLineCost

totalAmount
The total amount after reductions the buyer can expect to pay that is directly attributable to a single cart line.
```
Money
```

export interface CartLineCost {
  /**
   * The total amount after reductions the buyer can expect to pay that is directly attributable to a single
   * cart line.
   */
  totalAmount: Money;
}

CartBundleLineComponent

type
```
"bundle"
```
id
A unique identifier for the bundle line component. This ID is not stable. If an operation updates the line items in any way, all IDs could change.
```
string
```
merchandise
The merchandise of this bundle line component.
```
Merchandise
```
quantity
The quantity of merchandise being purchased.
```
number
```
cost
The cost attributed to this bundle line component.
```
CartLineCost
```
attributes
Additional custom attributes for the bundle line component.
```
Attribute[]
```

export interface CartBundleLineComponent {
  type: 'bundle';

  /**
   * A unique identifier for the bundle line component.
   *
   * This ID is not stable. If an operation updates the line items in any way, all IDs could change.
   *
   * @example 'gid://shopify/CartLineComponent/123'
   */
  id: string;

  /**
   * The merchandise of this bundle line component.
   */
  merchandise: Merchandise;

  /**
   * The quantity of merchandise being purchased.
   */
  quantity: number;

  /**
   * The cost attributed to this bundle line component.
   */
  cost: CartLineCost;

  /**
   * Additional custom attributes for the bundle line component.
   *
   * @example [{key: 'engraving', value: 'hello world'}]
   */
  attributes: Attribute[];
}

Localization

currency
The currency that the buyer sees for money amounts in the checkout.
```
StatefulRemoteSubscribable<Currency>
```
timezone
The buyer’s time zone.
```
StatefulRemoteSubscribable<Timezone>
```
language
The language the buyer sees in the checkout.
```
StatefulRemoteSubscribable<Language>
```
extensionLanguage
This is the buyer's language, as supported by the extension. If the buyer's actual language is not supported by the extension, this is the fallback locale used for translations. For example, if the buyer's language is 'fr-CA' but your extension only supports translations for 'fr', then the `isoCode` for this language is 'fr'. If your extension does not provide french translations at all, this value is the default locale for your extension (that is, the one matching your .default.json file).
```
StatefulRemoteSubscribable<Language>
```
country
The country context of the checkout. This value carries over from the context of the cart, where it was used to contextualize the storefront experience. It will update if the buyer changes the country of their shipping address. The value is undefined if unknown.
```
StatefulRemoteSubscribable<Country | undefined>
```
market
The [market](/docs/apps/markets) context of the checkout. This value carries over from the context of the cart, where it was used to contextualize the storefront experience. It will update if the buyer changes the country of their shipping address. The value is undefined if unknown.
```
StatefulRemoteSubscribable<Market | undefined>
```

export interface Localization {
  /**
   * The currency that the buyer sees for money amounts in the checkout.
   */
  currency: StatefulRemoteSubscribable<Currency>;

  /**
   * The buyer’s time zone.
   */
  timezone: StatefulRemoteSubscribable<Timezone>;

  /**
   * The language the buyer sees in the checkout.
   */
  language: StatefulRemoteSubscribable<Language>;

  /**
   * This is the buyer's language, as supported by the extension.
   * If the buyer's actual language is not supported by the extension,
   * this is the fallback locale used for translations.
   *
   * For example, if the buyer's language is 'fr-CA' but your extension
   * only supports translations for 'fr', then the `isoCode` for this
   * language is 'fr'. If your extension does not provide french
   * translations at all, this value is the default locale for your
   * extension (that is, the one matching your .default.json file).
   */
  extensionLanguage: StatefulRemoteSubscribable<Language>;

  /**
   * The country context of the checkout. This value carries over from the
   * context of the cart, where it was used to contextualize the storefront
   * experience. It will update if the buyer changes the country of their
   * shipping address. The value is undefined if unknown.
   */
  country: StatefulRemoteSubscribable<Country | undefined>;

  /**
   * The [market](/docs/apps/markets) context of the
   * checkout. This value carries over from the context of the cart, where it
   * was used to contextualize the storefront experience. It will update if the
   * buyer changes the country of their shipping address. The value is undefined
   * if unknown.
   */
  market: StatefulRemoteSubscribable<Market | undefined>;
}

Currency

isoCode
The ISO-4217 code for this currency.
```
CurrencyCode
```

export interface Currency {
  /**
   * The ISO-4217 code for this currency.
   * @see https://www.iso.org/iso-4217-currency-codes.html
   */
  isoCode: CurrencyCode;
}

Timezone

'Africa/Abidjan' | 'Africa/Algiers' | 'Africa/Bissau' | 'Africa/Cairo' | 'Africa/Casablanca' | 'Africa/Ceuta' | 'Africa/El_Aaiun' | 'Africa/Johannesburg' | 'Africa/Juba' | 'Africa/Khartoum' | 'Africa/Lagos' | 'Africa/Maputo' | 'Africa/Monrovia' | 'Africa/Nairobi' | 'Africa/Ndjamena' | 'Africa/Sao_Tome' | 'Africa/Tripoli' | 'Africa/Tunis' | 'Africa/Windhoek' | 'America/Adak' | 'America/Anchorage' | 'America/Araguaina' | 'America/Argentina/Buenos_Aires' | 'America/Argentina/Catamarca' | 'America/Argentina/Cordoba' | 'America/Argentina/Jujuy' | 'America/Argentina/La_Rioja' | 'America/Argentina/Mendoza' | 'America/Argentina/Rio_Gallegos' | 'America/Argentina/Salta' | 'America/Argentina/San_Juan' | 'America/Argentina/San_Luis' | 'America/Argentina/Tucuman' | 'America/Argentina/Ushuaia' | 'America/Asuncion' | 'America/Bahia' | 'America/Bahia_Banderas' | 'America/Barbados' | 'America/Belem' | 'America/Belize' | 'America/Boa_Vista' | 'America/Bogota' | 'America/Boise' | 'America/Cambridge_Bay' | 'America/Campo_Grande' | 'America/Cancun' | 'America/Caracas' | 'America/Cayenne' | 'America/Chicago' | 'America/Chihuahua' | 'America/Costa_Rica' | 'America/Cuiaba' | 'America/Danmarkshavn' | 'America/Dawson' | 'America/Dawson_Creek' | 'America/Denver' | 'America/Detroit' | 'America/Edmonton' | 'America/Eirunepe' | 'America/El_Salvador' | 'America/Fort_Nelson' | 'America/Fortaleza' | 'America/Glace_Bay' | 'America/Goose_Bay' | 'America/Grand_Turk' | 'America/Guatemala' | 'America/Guayaquil' | 'America/Guyana' | 'America/Halifax' | 'America/Havana' | 'America/Hermosillo' | 'America/Indiana/Indianapolis' | 'America/Indiana/Knox' | 'America/Indiana/Marengo' | 'America/Indiana/Petersburg' | 'America/Indiana/Tell_City' | 'America/Indiana/Vevay' | 'America/Indiana/Vincennes' | 'America/Indiana/Winamac' | 'America/Inuvik' | 'America/Iqaluit' | 'America/Jamaica' | 'America/Juneau' | 'America/Kentucky/Louisville' | 'America/Kentucky/Monticello' | 'America/La_Paz' | 'America/Lima' | 'America/Los_Angeles' | 'America/Maceio' | 'America/Managua' | 'America/Manaus' | 'America/Martinique' | 'America/Matamoros' | 'America/Mazatlan' | 'America/Menominee' | 'America/Merida' | 'America/Metlakatla' | 'America/Mexico_City' | 'America/Miquelon' | 'America/Moncton' | 'America/Monterrey' | 'America/Montevideo' | 'America/New_York' | 'America/Nipigon' | 'America/Nome' | 'America/Noronha' | 'America/North_Dakota/Beulah' | 'America/North_Dakota/Center' | 'America/North_Dakota/New_Salem' | 'America/Nuuk' | 'America/Ojinaga' | 'America/Panama' | 'America/Pangnirtung' | 'America/Paramaribo' | 'America/Phoenix' | 'America/Port-au-Prince' | 'America/Porto_Velho' | 'America/Puerto_Rico' | 'America/Punta_Arenas' | 'America/Rainy_River' | 'America/Rankin_Inlet' | 'America/Recife' | 'America/Regina' | 'America/Resolute' | 'America/Rio_Branco' | 'America/Santarem' | 'America/Santiago' | 'America/Santo_Domingo' | 'America/Sao_Paulo' | 'America/Scoresbysund' | 'America/Sitka' | 'America/St_Johns' | 'America/Swift_Current' | 'America/Tegucigalpa' | 'America/Thule' | 'America/Thunder_Bay' | 'America/Tijuana' | 'America/Toronto' | 'America/Vancouver' | 'America/Whitehorse' | 'America/Winnipeg' | 'America/Yakutat' | 'America/Yellowknife' | 'Antarctica/Casey' | 'Antarctica/Davis' | 'Antarctica/Macquarie' | 'Antarctica/Mawson' | 'Antarctica/Palmer' | 'Antarctica/Rothera' | 'Antarctica/Troll' | 'Antarctica/Vostok' | 'Asia/Almaty' | 'Asia/Amman' | 'Asia/Anadyr' | 'Asia/Aqtau' | 'Asia/Aqtobe' | 'Asia/Ashgabat' | 'Asia/Atyrau' | 'Asia/Baghdad' | 'Asia/Baku' | 'Asia/Bangkok' | 'Asia/Barnaul' | 'Asia/Beirut' | 'Asia/Bishkek' | 'Asia/Brunei' | 'Asia/Chita' | 'Asia/Choibalsan' | 'Asia/Colombo' | 'Asia/Damascus' | 'Asia/Dhaka' | 'Asia/Dili' | 'Asia/Dubai' | 'Asia/Dushanbe' | 'Asia/Famagusta' | 'Asia/Gaza' | 'Asia/Hebron' | 'Asia/Ho_Chi_Minh' | 'Asia/Hong_Kong' | 'Asia/Hovd' | 'Asia/Irkutsk' | 'Asia/Jakarta' | 'Asia/Jayapura' | 'Asia/Jerusalem' | 'Asia/Kabul' | 'Asia/Kamchatka' | 'Asia/Karachi' | 'Asia/Kathmandu' | 'Asia/Khandyga' | 'Asia/Kolkata' | 'Asia/Krasnoyarsk' | 'Asia/Kuala_Lumpur' | 'Asia/Kuching' | 'Asia/Macau' | 'Asia/Magadan' | 'Asia/Makassar' | 'Asia/Manila' | 'Asia/Nicosia' | 'Asia/Novokuznetsk' | 'Asia/Novosibirsk' | 'Asia/Omsk' | 'Asia/Oral' | 'Asia/Pontianak' | 'Asia/Pyongyang' | 'Asia/Qatar' | 'Asia/Qostanay' | 'Asia/Qyzylorda' | 'Asia/Riyadh' | 'Asia/Sakhalin' | 'Asia/Samarkand' | 'Asia/Seoul' | 'Asia/Shanghai' | 'Asia/Singapore' | 'Asia/Srednekolymsk' | 'Asia/Taipei' | 'Asia/Tashkent' | 'Asia/Tbilisi' | 'Asia/Tehran' | 'Asia/Thimphu' | 'Asia/Tokyo' | 'Asia/Tomsk' | 'Asia/Ulaanbaatar' | 'Asia/Urumqi' | 'Asia/Ust-Nera' | 'Asia/Vladivostok' | 'Asia/Yakutsk' | 'Asia/Yangon' | 'Asia/Yekaterinburg' | 'Asia/Yerevan' | 'Atlantic/Azores' | 'Atlantic/Bermuda' | 'Atlantic/Canary' | 'Atlantic/Cape_Verde' | 'Atlantic/Faroe' | 'Atlantic/Madeira' | 'Atlantic/Reykjavik' | 'Atlantic/South_Georgia' | 'Atlantic/Stanley' | 'Australia/Adelaide' | 'Australia/Brisbane' | 'Australia/Broken_Hill' | 'Australia/Darwin' | 'Australia/Eucla' | 'Australia/Hobart' | 'Australia/Lindeman' | 'Australia/Lord_Howe' | 'Australia/Melbourne' | 'Australia/Perth' | 'Australia/Sydney' | 'CET' | 'CST6CDT' | 'EET' | 'EST' | 'EST5EDT' | 'Etc/GMT' | 'Etc/GMT-1' | 'Etc/GMT-10' | 'Etc/GMT-11' | 'Etc/GMT-12' | 'Etc/GMT-13' | 'Etc/GMT-14' | 'Etc/GMT-2' | 'Etc/GMT-3' | 'Etc/GMT-4' | 'Etc/GMT-5' | 'Etc/GMT-6' | 'Etc/GMT-7' | 'Etc/GMT-8' | 'Etc/GMT-9' | 'Etc/GMT+1' | 'Etc/GMT+10' | 'Etc/GMT+11' | 'Etc/GMT+12' | 'Etc/GMT+2' | 'Etc/GMT+3' | 'Etc/GMT+4' | 'Etc/GMT+5' | 'Etc/GMT+6' | 'Etc/GMT+7' | 'Etc/GMT+8' | 'Etc/GMT+9' | 'Etc/UTC' | 'Europe/Amsterdam' | 'Europe/Andorra' | 'Europe/Astrakhan' | 'Europe/Athens' | 'Europe/Belgrade' | 'Europe/Berlin' | 'Europe/Brussels' | 'Europe/Bucharest' | 'Europe/Budapest' | 'Europe/Chisinau' | 'Europe/Copenhagen' | 'Europe/Dublin' | 'Europe/Gibraltar' | 'Europe/Helsinki' | 'Europe/Istanbul' | 'Europe/Kaliningrad' | 'Europe/Kiev' | 'Europe/Kirov' | 'Europe/Lisbon' | 'Europe/London' | 'Europe/Luxembourg' | 'Europe/Madrid' | 'Europe/Malta' | 'Europe/Minsk' | 'Europe/Monaco' | 'Europe/Moscow' | 'Europe/Oslo' | 'Europe/Paris' | 'Europe/Prague' | 'Europe/Riga' | 'Europe/Rome' | 'Europe/Samara' | 'Europe/Saratov' | 'Europe/Simferopol' | 'Europe/Sofia' | 'Europe/Stockholm' | 'Europe/Tallinn' | 'Europe/Tirane' | 'Europe/Ulyanovsk' | 'Europe/Uzhgorod' | 'Europe/Vienna' | 'Europe/Vilnius' | 'Europe/Volgograd' | 'Europe/Warsaw' | 'Europe/Zaporozhye' | 'Europe/Zurich' | 'HST' | 'Indian/Chagos' | 'Indian/Christmas' | 'Indian/Cocos' | 'Indian/Kerguelen' | 'Indian/Mahe' | 'Indian/Maldives' | 'Indian/Mauritius' | 'Indian/Reunion' | 'MET' | 'MST' | 'MST7MDT' | 'Pacific/Apia' | 'Pacific/Auckland' | 'Pacific/Bougainville' | 'Pacific/Chatham' | 'Pacific/Chuuk' | 'Pacific/Easter' | 'Pacific/Efate' | 'Pacific/Fakaofo' | 'Pacific/Fiji' | 'Pacific/Funafuti' | 'Pacific/Galapagos' | 'Pacific/Gambier' | 'Pacific/Guadalcanal' | 'Pacific/Guam' | 'Pacific/Honolulu' | 'Pacific/Kanton' | 'Pacific/Kiritimati' | 'Pacific/Kosrae' | 'Pacific/Kwajalein' | 'Pacific/Majuro' | 'Pacific/Marquesas' | 'Pacific/Nauru' | 'Pacific/Niue' | 'Pacific/Norfolk' | 'Pacific/Noumea' | 'Pacific/Pago_Pago' | 'Pacific/Palau' | 'Pacific/Pitcairn' | 'Pacific/Pohnpei' | 'Pacific/Port_Moresby' | 'Pacific/Rarotonga' | 'Pacific/Tahiti' | 'Pacific/Tarawa' | 'Pacific/Tongatapu' | 'Pacific/Wake' | 'Pacific/Wallis' | 'PST8PDT' | 'WET'

Language

isoCode
The BCP-47 language tag. It may contain a dash followed by an ISO 3166-1 alpha-2 region code.
```
string
```

export interface Language {
  /**
   * The BCP-47 language tag. It may contain a dash followed by an ISO 3166-1 alpha-2 region code.
   *
   * @example 'en' for English, or 'en-US' for English local to United States.
   * @see https://en.wikipedia.org/wiki/IETF_language_tag
   * @see https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2
   */
  isoCode: string;
}

Country

isoCode
The ISO-3166-1 code for this country.
```
CountryCode
```

export interface Country {
  /**
   * The ISO-3166-1 code for this country.
   * @see https://www.iso.org/iso-3166-country-codes.html
   */
  isoCode: CountryCode;
}

CountryCode

'AC' | 'AD' | 'AE' | 'AF' | 'AG' | 'AI' | 'AL' | 'AM' | 'AN' | 'AO' | 'AR' | 'AT' | 'AU' | 'AW' | 'AX' | 'AZ' | 'BA' | 'BB' | 'BD' | 'BE' | 'BF' | 'BG' | 'BH' | 'BI' | 'BJ' | 'BL' | 'BM' | 'BN' | 'BO' | 'BQ' | 'BR' | 'BS' | 'BT' | 'BV' | 'BW' | 'BY' | 'BZ' | 'CA' | 'CC' | 'CD' | 'CF' | 'CG' | 'CH' | 'CI' | 'CK' | 'CL' | 'CM' | 'CN' | 'CO' | 'CR' | 'CU' | 'CV' | 'CW' | 'CX' | 'CY' | 'CZ' | 'DE' | 'DJ' | 'DK' | 'DM' | 'DO' | 'DZ' | 'EC' | 'EE' | 'EG' | 'EH' | 'ER' | 'ES' | 'ET' | 'FI' | 'FJ' | 'FK' | 'FO' | 'FR' | 'GA' | 'GB' | 'GD' | 'GE' | 'GF' | 'GG' | 'GH' | 'GI' | 'GL' | 'GM' | 'GN' | 'GP' | 'GQ' | 'GR' | 'GS' | 'GT' | 'GW' | 'GY' | 'HK' | 'HM' | 'HN' | 'HR' | 'HT' | 'HU' | 'ID' | 'IE' | 'IL' | 'IM' | 'IN' | 'IO' | 'IQ' | 'IR' | 'IS' | 'IT' | 'JE' | 'JM' | 'JO' | 'JP' | 'KE' | 'KG' | 'KH' | 'KI' | 'KM' | 'KN' | 'KP' | 'KR' | 'KW' | 'KY' | 'KZ' | 'LA' | 'LB' | 'LC' | 'LI' | 'LK' | 'LR' | 'LS' | 'LT' | 'LU' | 'LV' | 'LY' | 'MA' | 'MC' | 'MD' | 'ME' | 'MF' | 'MG' | 'MK' | 'ML' | 'MM' | 'MN' | 'MO' | 'MQ' | 'MR' | 'MS' | 'MT' | 'MU' | 'MV' | 'MW' | 'MX' | 'MY' | 'MZ' | 'NA' | 'NC' | 'NE' | 'NF' | 'NG' | 'NI' | 'NL' | 'NO' | 'NP' | 'NR' | 'NU' | 'NZ' | 'OM' | 'PA' | 'PE' | 'PF' | 'PG' | 'PH' | 'PK' | 'PL' | 'PM' | 'PN' | 'PS' | 'PT' | 'PY' | 'QA' | 'RE' | 'RO' | 'RS' | 'RU' | 'RW' | 'SA' | 'SB' | 'SC' | 'SD' | 'SE' | 'SG' | 'SH' | 'SI' | 'SJ' | 'SK' | 'SL' | 'SM' | 'SN' | 'SO' | 'SR' | 'SS' | 'ST' | 'SV' | 'SX' | 'SY' | 'SZ' | 'TA' | 'TC' | 'TD' | 'TF' | 'TG' | 'TH' | 'TJ' | 'TK' | 'TL' | 'TM' | 'TN' | 'TO' | 'TR' | 'TT' | 'TV' | 'TW' | 'TZ' | 'UA' | 'UG' | 'UM' | 'US' | 'UY' | 'UZ' | 'VA' | 'VC' | 'VE' | 'VG' | 'VN' | 'VU' | 'WF' | 'WS' | 'XK' | 'YE' | 'YT' | 'ZA' | 'ZM' | 'ZW' | 'ZZ'

Market

id
A globally-unique identifier for a market.
```
string
```
handle
The human-readable, shop-scoped identifier for the market.
```
string
```

export interface Market {
  /**
   * A globally-unique identifier for a market.
   */
  id: string;

  /**
   * The human-readable, shop-scoped identifier for the market.
   */
  handle: string;
}

Metafield

Metadata associated with the checkout.

key
The name of the metafield. It must be between 3 and 30 characters in length (inclusive).
```
string
```
namespace
A container for a set of metafields. You need to define a custom namespace for your metafields to distinguish them from the metafields used by other apps. This must be between 2 and 20 characters in length (inclusive).
```
string
```
value
The information to be stored as metadata.
```
string | number
```
valueType
The metafield’s information type.
```
"string" | "integer" | "json_string"
```

export interface Metafield {
  /**
   * The name of the metafield. It must be between 3 and 30 characters in
   * length (inclusive).
   */
  key: string;

  /**
   * A container for a set of metafields. You need to define a custom
   * namespace for your metafields to distinguish them from the metafields
   * used by other apps. This must be between 2 and 20 characters in length (inclusive).
   */
  namespace: string;

  /**
   * The information to be stored as metadata.
   */
  value: string | number;

  /** The metafield’s information type. */
  valueType: 'integer' | 'string' | 'json_string';
}

StorefrontApiVersion

Union of supported storefront API versions

'2022-04' | '2022-07' | '2022-10' | '2023-01' | '2023-04' | '2023-07' | 'unstable'

SelectedPaymentOption

A payment option selected by the buyer.

handle
The unique handle referencing `PaymentOption.handle`. See [availablePaymentOptions](/docs/api/checkout-ui-extensions/apis/standardapi#properties-propertydetail-availablepaymentoptions).
```
string
```

export interface SelectedPaymentOption {
  /**
   * The unique handle referencing `PaymentOption.handle`.
   *
   * See [availablePaymentOptions](/docs/api/checkout-ui-extensions/apis/standardapi#properties-propertydetail-availablepaymentoptions).
   */
  handle: string;
}

SessionToken

get
Requests a session token that hasn't expired. You should call this method every time you need to make a request to your backend in order to get a valid token. This method will return cached tokens when possible, so you don’t need to worry about storing these tokens yourself.
```
() => Promise<string>
```

export interface SessionToken {
  /**
   * Requests a session token that hasn't expired. You should call this method every
   * time you need to make a request to your backend in order to get a valid token.
   * This method will return cached tokens when possible, so you don’t need to worry
   * about storing these tokens yourself.
   */
  get(): Promise<string>;
}

ExtensionSettings

The merchant-defined setting values for the extension.

[key: string]
```
string | number | boolean | undefined
```

export interface ExtensionSettings {
  [key: string]: string | number | boolean | undefined;
}

MailingAddress

name
The buyer's full name. {% include /apps/checkout/privacy-icon.md %} Requires level 2 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
```
string
```
firstName
The buyer's first name. {% include /apps/checkout/privacy-icon.md %} Requires level 2 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
```
string
```
lastName
The buyer's last name. {% include /apps/checkout/privacy-icon.md %} Requires level 2 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
```
string
```
company
The buyer's company name. {% include /apps/checkout/privacy-icon.md %} Requires level 1 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
```
string
```
address1
The first line of the buyer's address, including street name and number. {% include /apps/checkout/privacy-icon.md %} Requires level 2 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
```
string
```
address2
The second line of the buyer's address, like apartment number, suite, etc. {% include /apps/checkout/privacy-icon.md %} Requires level 2 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
```
string
```
city
The buyer's city. {% include /apps/checkout/privacy-icon.md %} Requires level 2 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
```
string
```
zip
The buyer's postal or ZIP code. {% include /apps/checkout/privacy-icon.md %} Requires level 2 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
```
string
```
countryCode
The ISO 3166 Alpha-2 format for the buyer's country. Refer to https://www.iso.org/iso-3166-country-codes.html. {% include /apps/checkout/privacy-icon.md %} Requires level 2 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
```
CountryCode
```
provinceCode
The buyer's province code, such as state, province, prefecture, or region. {% include /apps/checkout/privacy-icon.md %} Requires level 2 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
```
string
```
phone
The buyer's phone number. {% include /apps/checkout/privacy-icon.md %} Requires level 2 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
```
string
```

export interface MailingAddress {
  /**
   * The buyer's full name.
   *
   * {% include /apps/checkout/privacy-icon.md %} Requires level 2 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
   *
   * @example 'John Doe'
   */
  name?: string;

  /**
   * The buyer's first name.
   *
   * {% include /apps/checkout/privacy-icon.md %} Requires level 2 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
   *
   * @example 'John'
   */
  firstName?: string;

  /**
   * The buyer's last name.
   *
   * {% include /apps/checkout/privacy-icon.md %} Requires level 2 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
   *
   * @example 'Doe'
   */
  lastName?: string;

  /**
   * The buyer's company name.
   *
   * {% include /apps/checkout/privacy-icon.md %} Requires level 1 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
   *
   * @example 'Shopify'
   */
  company?: string;

  /**
   * The first line of the buyer's address, including street name and number.
   *
   * {% include /apps/checkout/privacy-icon.md %} Requires level 2 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
   *
   * @example '151 O'Connor Street'
   */
  address1?: string;

  /**
   * The second line of the buyer's address, like apartment number, suite, etc.
   *
   * {% include /apps/checkout/privacy-icon.md %} Requires level 2 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
   *
   * @example 'Ground floor'
   */
  address2?: string;

  /**
   * The buyer's city.
   *
   * {% include /apps/checkout/privacy-icon.md %} Requires level 2 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
   *
   * @example 'Ottawa'
   */
  city?: string;

  /**
   * The buyer's postal or ZIP code.
   *
   * {% include /apps/checkout/privacy-icon.md %} Requires level 2 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
   *
   * @example 'K2P 2L8'
   */
  zip?: string;

  /**
   * The ISO 3166 Alpha-2 format for the buyer's country. Refer to https://www.iso.org/iso-3166-country-codes.html.
   *
   * {% include /apps/checkout/privacy-icon.md %} Requires level 2 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
   *
   * @example 'CA' for Canada.
   */
  countryCode?: CountryCode;

  /**
   * The buyer's province code, such as state, province, prefecture, or region.
   *
   * {% include /apps/checkout/privacy-icon.md %} Requires level 2 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
   *
   * @example 'ON' for Ontario.
   */
  provinceCode?: string;

  /**
   * The buyer's phone number.
   *
   * {% include /apps/checkout/privacy-icon.md %} Requires level 2 access to [protected customer data](/docs/apps/store/data-protection/protected-customer-data).
   *
   * @example '+1 613 111 2222'.
   */
  phone?: string;
}

Shop

id
The shop ID.
```
string
```
name
The name of the shop.
```
string
```
storefrontUrl
The primary storefront URL.
```
string
```
myshopifyDomain
The shop's myshopify.com domain.
```
string
```

export interface Shop {
  /**
   * The shop ID.
   * @example 'gid://shopify/Shop/123'
   */
  id: string;
  /**
   * The name of the shop.
   */
  name: string;
  /**
   * The primary storefront URL.
   */
  storefrontUrl?: string;
  /**
   * The shop's myshopify.com domain.
   */
  myshopifyDomain: string;
}

Storage

A key-value storage object for extension targets. Stored data is only available to this specific app at this specific extension target. The storage backend is implemented with `localStorage` and should persist across the buyer's checkout session. However, data persistence isn't guaranteed.

read
Read and return a stored value by key. The stored data is deserialized from JSON and returned as its original primitive. Returns `null` if no stored data exists.
```
<T = unknown>(key: string) => Promise<T>
```
write
Write stored data for this key. The data must be serializable to JSON.
```
(key: string, data: any) => Promise<void>
```
delete
Delete stored data by key.
```
(key: string) => Promise<void>
```

export interface Storage {
  /**
   * Read and return a stored value by key.
   *
   * The stored data is deserialized from JSON and returned as
   * its original primitive.
   *
   * Returns `null` if no stored data exists.
   */
  read<T = unknown>(key: string): Promise<T | null>;

  /**
   * Write stored data for this key.
   *
   * The data must be serializable to JSON.
   */
  write(key: string, data: any): Promise<void>;

  /**
   * Delete stored data by key.
   */
  delete(key: string): Promise<void>;
}

Ui

overlay
```
{ close(overlayId: string): void; }
```

export interface Ui {
  overlay: {
    close(overlayId: string): void;
  };
}

Version

string

Examples

import {

BlockStack,

reactExtension,

Text,

useApi,

} from '@shopify/ui-extensions-react/checkout';

// 1. Choose an extension target

export default reactExtension(

'purchase.checkout.block.render',

() => <Extension />,

);

function Extension() {

// 2. Use the extension API to gather context from the checkout and shop

const {cost, shop} = useApi();

// 3. Render a UI

return (

<Text>cost: {cost.totalAmount}</Text>

</BlockStack>

);

}

Examples

How extensions work

Description

The extension API allows you to access information about the merchant's store, the customer's cart, and make changes.

React

import {
  BlockStack,
  reactExtension,
  Text,
  useApi,
} from '@shopify/ui-extensions-react/checkout';

// 1. Choose an extension target
export default reactExtension(
  'purchase.checkout.block.render',
  () => <Extension />,
);

function Extension() {
  // 2. Use the extension API to gather context from the checkout and shop
  const {cost, shop} = useApi();

  // 3. Render a UI
  return (
    <BlockStack>
      <Text>Shop name: {shop.name}</Text>
      <Text>cost: {cost.totalAmount}</Text>
    </BlockStack>
  );
}

JavaScript

import {
  BlockStack,
  Text,
  extension,
} from '@shopify/ui-extensions/checkout';

export default extension(
  'purchase.checkout.block.render',
  (root, {shop, cost}) => {
    root.appendChild(
      root.createComponent(
        BlockStack,
        undefined,
        [
          root.createComponent(
            Text,
            undefined,
            `Shop name: ${shop.name}`,
          ),
          root.createComponent(
            Text,
            undefined,
            `Cost: ${cost.totalAmount}`,
          ),
        ],
      ),
    );
  },
);

Accessing Properties

Description

The extension API is passed as a parameter to the extension target function. In React, you can access it from any component through the `useApi()` hook.

React

import {
  reactExtension,
  Text,
  useApi,
} from '@shopify/ui-extensions-react/checkout';

export default reactExtension(
  'purchase.checkout.block.render',
  () => <Extension />,
);

function Extension() {
  const {shop} = useApi();
  return <Text>Shop name: {shop.name}</Text>;
}

JavaScript

import {extension} from '@shopify/ui-extensions/checkout';

export default extension(
  'purchase.checkout.block.render',
  (root, {shop}) => {
    root.appendChild(
      root.createText(`Shop name: ${shop.name}`),
    );
  },
);

Subscribing to changes

Description

Some API property values may change after the extension is rendered. `StatefulRemoteSubscribable` properties allow you to subscribe to changes and perform a function or re-render your extension. If you are using React, you can utilize the property's corresponding hook, or the [`useSubscription()`](/docs/api/checkout-ui-extensions/react-hooks/utilities/usesubscription) hook to subscribe to changes and automatically re-render your extension.

React

import {
  reactExtension,
  Text,
  useNote,
} from '@shopify/ui-extensions-react/checkout';

export default reactExtension(
  'purchase.checkout.block.render',
  () => <Extension />,
);

function Extension() {
  const note = useNote();
  return <Text>Note: {note}</Text>;
}

JavaScript

import {extension} from '@shopify/ui-extensions/checkout';

export default extension(
  'purchase.checkout.block.render',
  (root, {note}) => {
    const text = root.createText('');
    note.subscribe((value) => {
      if (value) {
        text.updateText(value);
      }
    });
    root.appendChild(text);
  },
);

Translating strings

Description

Define strings in JSON files for each locale and render them using `translate()`. See [localizing UI extensions](/docs/apps/checkout/best-practices/localizing-ui-extensions) for more information.

React

/* See the locales/en.default.json tab for the translation keys and values for this example */
import {
  reactExtension,
  Text,
  useTranslate,
} from '@shopify/ui-extensions-react/checkout';

export default reactExtension(
  'purchase.checkout.block.render',
  () => <Extension />,
);

function Extension() {
  const translate = useTranslate();
  return (
    <Text>{translate('welcomeMessage')}</Text>
  );
}

JavaScript

/* See the locales/en.default.json tab for the translation keys and values for this example */
import {extension} from '@shopify/ui-extensions/checkout';

export default extension(
  'purchase.checkout.block.render',
  (root, {i18n}) => {
    const welcomeMsg = i18n.translate(
      'welcomeMessage',
    );

    root.appendChild(root.createText(welcomeMsg));
  },
);

locales/en.default.json

{
  "welcomeMessage": "Welcome to our store!"
}

Translating strings with pluralization

Description

You can use the `count` option to get a pluralized string based on the current locale. See [localizing UI extensions](/docs/apps/checkout/best-practices/localizing-ui-extensions) for more information.

React

/* See the locales/en.default.json tab for the translation keys and values for this example */
import {
  reactExtension,
  Banner,
  useApi,
  useTranslate,
} from '@shopify/ui-extensions-react/checkout';

export default reactExtension(
  'purchase.checkout.block.render',
  () => <Extension />,
);

function Extension() {
  const {i18n} = useApi();
  const translate = useTranslate();

  const points = 10000;
  const formattedPoints =
    i18n.formatNumber(points);
  // Translate the loyalty points message, using pluralization to differentiate messages
  const loyaltyPointsMsg = translate(
    'loyaltyPoints',
    {
      count: points,
      formattedPoints,
    },
  );

  return <Banner title={loyaltyPointsMsg} />;
}

JavaScript

/* See the locales/en.default.json tab for the translation keys and values for this example */
import {
  extension,
  Banner,
} from '@shopify/ui-extensions/checkout';

export default extension(
  'purchase.checkout.block.render',
  (root, {i18n}) => {
    const points = 10000;
    const formattedPoints =
      i18n.formatNumber(points);
    // Translate the loyalty points message, using pluralization to differentiate messages
    const loyaltyPointsMsg = i18n.translate(
      'loyaltyPoints',
      {
        count: points,
        formattedPoints,
      },
    );

    const app = root.createComponent(Banner, {
      title: loyaltyPointsMsg,
    });

    root.appendChild(app);
  },
);

locales/en.default.json

{
  "loyaltyPoints": {
    "one": "You have {{formattedPoints}} loyalty point",
    "other": "You have {{formattedPoints}} loyalty points"
  }
}

Define merchant settings

Description

You can define settings that merchants can edit within the checkout editor. See [settings](/docs/api/checkout-ui-extensions/configuration#settings-definition) for more information on how to define these.

shopify.extension.toml

api_version = "2023-07"

[[extensions]]
name = "My checkout extension"
handle = "checkout-ui"
type = "ui_extension"

  [[extensions.targeting]]
  target = "purchase.checkout.block.render"
  module = "./Checkout.jsx"

  [extensions.settings]
    [[extensions.settings.fields]]
    key = "banner_title"
    type = "single_line_text_field"
    name = "Banner title"
    description = "Enter a title for the banner."
    [[extensions.settings.fields.validations]]
    name = "min"
    value = "5"
    [[extensions.settings.fields.validations]]
    name = "max"
    value = "20"

Accessing merchant settings

Description

You can retrieve settings values within your extension. In React, the `useSettings()` hook re-renders your extension with the latest values. In JavaScript, subscribe to changes and update your UI directly.

React

import {
  reactExtension,
  Banner,
  useSettings,
} from '@shopify/ui-extensions-react/checkout';

export default reactExtension(
  'purchase.checkout.block.render',
  () => <Extension />,
);

function Extension() {
  const {banner_title} = useSettings();
  return <Banner title={banner_title} />;
}

JavaScript

import {
  extension,
  Banner,
} from '@shopify/ui-extensions/checkout';

export default extension(
  'purchase.checkout.block.render',
  (root, {settings}) => {
    const banner = root.createComponent(Banner, {
      title: settings.current.banner_title,
    });

    // When the merchant updates the banner title in the checkout editor, re-render the banner
    settings.subscribe((newSettings) => {
      banner.updateProps({
        title: newSettings.banner_title,
      });
    });

    root.appendChild(banner);
  },
);

Access the Storefront API with query

Description

You can access the [Storefront GraphQL API](/docs/api/storefront) via the `query()` helper function. Ensure your extension can use this API by [enabling the `api_access` capability](/docs/api/checkout-ui-extensions/configuration#api-access).

React

import {useEffect, useState} from 'react';
import {
  useApi,
  reactExtension,
  List,
  ListItem,
} from '@shopify/ui-extensions-react/checkout';

export default reactExtension(
  'purchase.checkout.block.render',
  () => <Extension />,
);

function Extension() {
  const [data, setData] = useState();
  const {query} = useApi();

  useEffect(() => {
    query(
      `query ($first: Int!) {
        products(first: $first) {
          nodes {
            id
            title
          }
        }
      }`,
      {
        variables: {first: 5},
      },
    )
      .then(({data, errors}) => setData(data))
      .catch(console.error);
  }, [query]);

  return (
    <List>
      {data?.products?.nodes.map((node) => (
        <ListItem key={node.id}>
          {node.title}
        </ListItem>
      ))}
    </List>
  );
}

JavaScript

import {
  extension,
  List,
  ListItem,
} from '@shopify/ui-extensions/checkout';

export default extension(
  'purchase.checkout.block.render',
  (root, {query}) => {
    query<any>(
      `query ($first: Int!) {
      products(first: $first) {
        nodes {
          id
          title
        }
      }
    }`,
      {
        variables: {first: 5},
      },
    )
      .then(({data}) => {
        const listItems =
          data?.products?.nodes.map((node) =>
            root.createComponent(
              ListItem,
              undefined,
              node.title,
            ),
          );

        root.appendChild(
          root.createComponent(
            List,
            undefined,
            listItems,
          ),
        );
      })
      .catch(console.error);
  },
);

Accessing the Storefront API with fetch()

Description

You can access the [Storefront GraphQL API](/docs/api/storefront) using global `fetch()`. Ensure your extension can access the Storefront API via the [`api_access` capability](/docs/api/checkout-ui-extensions/configuration#api-access).

React

import {useEffect, useState} from 'react';
import {
  useApi,
  reactExtension,
  List,
  ListItem,
} from '@shopify/ui-extensions-react/checkout';

export default reactExtension(
  'purchase.checkout.block.render',
  () => <Extension />,
);

function Extension() {
  const {shop} = useApi();
  const [data, setData] = useState();

  useEffect(() => {
    const getProductsQuery = {
      query: `query ($first: Int!) {
        products(first: $first) {
          nodes {
            id
            title
          }
        }
      }`,
      variables: {first: 5},
    };

    const apiVersion = 'unstable';

    fetch(
      `${shop.storefrontUrl}api/${apiVersion}/graphql.json`,
      {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json',
        },
        body: JSON.stringify(getProductsQuery),
      },
    )
      .then((response) => response.json())
      .then(({data, errors}) => setData(data))
      .catch(console.error);
  }, [shop]);

  return (
    <List>
      {data?.products?.nodes.map((node) => (
        <ListItem key={node.id}>
          {node.title}
        </ListItem>
      ))}
    </List>
  );
}

JavaScript

import {
  extension,
  List,
  ListItem,
} from '@shopify/ui-extensions/checkout';

export default extension(
  'purchase.checkout.block.render',
  (root, {shop}) => {
    const apiVersion = 'unstable';
    const getProductsQuery = {
      query: `query ($first: Int!) {
      products(first: $first) {
        nodes {
          id
          title
        }
      }
    }`,
      variables: {first: 5},
    };

    fetch(
      `${shop.storefrontUrl}api/${apiVersion}/graphql.json`,
      {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json',
        },
        body: JSON.stringify(getProductsQuery),
      },
    )
      .then((response) => response.json())
      .then(({data}) => {
        const listItems =
          data?.products?.nodes.map((node) =>
            root.createComponent(
              ListItem,
              undefined,
              node.title,
            ),
          );

        root.appendChild(
          root.createComponent(
            List,
            undefined,
            listItems,
          ),
        );
      })
      .catch(console.error);
  },
);

Block progress and show error for a checkout UI field

Description

Intercept and prevent a buyer's progress through checkout while targeting a specific checkout UI field. See the [validation tutorial](/docs/apps/checkout/validation) for more examples and best practices.

React

import {
  reactExtension,
  useBuyerJourneyIntercept,
  useShippingAddress,
} from '@shopify/ui-extensions-react/checkout';

export default reactExtension(
  'purchase.checkout.delivery-address.render-before',
  () => <Extension />,
);

function Extension() {
  const address = useShippingAddress();

  useBuyerJourneyIntercept(
    ({canBlockProgress}) => {
      return canBlockProgress &&
        address?.countryCode &&
        address.countryCode !== 'CA'
        ? {
            behavior: 'block',
            reason: 'Invalid shipping country',
            errors: [
              {
                message:
                  'Sorry, we can only ship to Canada',
                // Show an error underneath the country code field
                target:
                  '$.cart.deliveryGroups[0].deliveryAddress.countryCode',
              },
              {
                // In addition, show an error at the page level
                message:
                  'Please use a different address.',
              },
            ],
          }
        : {
            behavior: 'allow',
          };
    },
  );

  return null;
}

JavaScript

import {extension} from '@shopify/ui-extensions/checkout';

export default extension(
  'purchase.checkout.delivery-address.render-before',
  (root, {buyerJourney, shippingAddress}) => {
    let address = shippingAddress?.current;
    shippingAddress?.subscribe((newAddress) => {
      address = newAddress;
    });

    buyerJourney.intercept(
      ({canBlockProgress}) => {
        return canBlockProgress &&
          address?.countryCode &&
          address.countryCode !== 'CA'
          ? {
              behavior: 'block',
              reason: 'Invalid shipping country',
              errors: [
                {
                  message:
                    'Sorry, we can only ship to Canada',
                  // Show an error underneath the country code field
                  target:
                    '$.cart.deliveryGroups[0].deliveryAddress.countryCode',
                },
                {
                  // In addition, show an error at the page level
                  message:
                    'Please use a different address.',
                },
              ],
            }
          : {
              behavior: 'allow',
            };
      },
    );
  },
);

Block progress and show error at page level

Description

Intercept and prevent a buyer's progress through checkout while displaying an error message at the page level. See the [validation tutorial](/docs/apps/checkout/validation) for more examples and best practices.

React

import {
  reactExtension,
  useBuyerJourneyIntercept,
  useShippingAddress,
} from '@shopify/ui-extensions-react/checkout';

export default reactExtension(
  'purchase.checkout.delivery-address.render-before',
  () => <Extension />,
);

function Extension() {
  const address = useShippingAddress();

  useBuyerJourneyIntercept(
    ({canBlockProgress}) => {
      return canBlockProgress &&
        address?.countryCode &&
        address.countryCode !== 'CA'
        ? {
            behavior: 'block',
            reason: 'Invalid shipping country',
            errors: [
              {
                // An error without a `target` property is shown at page level
                message:
                  'Sorry, we can only ship to Canada',
              },
            ],
          }
        : {
            behavior: 'allow',
          };
    },
  );

  return null;
}

JavaScript

import {extension} from '@shopify/ui-extensions/checkout';

export default extension(
  'purchase.checkout.delivery-address.render-before',
  (root, {buyerJourney, shippingAddress}) => {
    let address = shippingAddress?.current;
    shippingAddress?.subscribe((newAddress) => {
      address = newAddress;
    });

    buyerJourney.intercept(
      ({canBlockProgress}) => {
        return canBlockProgress &&
          address?.countryCode &&
          address.countryCode !== 'CA'
          ? {
              behavior: 'block',
              reason: 'Invalid shipping country',
              errors: [
                {
                  // An error without a `target` property is shown at page level
                  message:
                    'Sorry, we can only ship to Canada',
                },
              ],
            }
          : {
              behavior: 'allow',
            };
      },
    );
  },
);

Block progress and show error in your extension

Description

Intercept and prevent a buyer's progress through checkout while displaying an error message in your extension. See the [validation tutorial](/docs/apps/checkout/validation) for more examples and best practices.

React

import {useState} from 'react';
import {
  reactExtension,
  Banner,
  useBuyerJourneyIntercept,
  useTarget,
} from '@shopify/ui-extensions-react/checkout';

export default reactExtension(
  'purchase.checkout.cart-line-item.render-after',
  () => <Extension />,
);

function Extension() {
  const [showError, setShowError] =
    useState(false);
  const {quantity} = useTarget();

  useBuyerJourneyIntercept(
    ({canBlockProgress}) => {
      return canBlockProgress && quantity > 1
        ? {
            behavior: 'block',
            reason: 'limited stock',
            perform: (result) => {
              if (result.behavior === 'block') {
                setShowError(true);
              }
            },
          }
        : {
            behavior: 'allow',
            perform: () => {
              setShowError(false);
            },
          };
    },
  );

  return showError ? (
    <Banner>
      This item has a limit of one per customer.
    </Banner>
  ) : null;
}

JavaScript

import {
  extension,
  Banner,
} from '@shopify/ui-extensions/checkout';

export default extension(
  'purchase.checkout.cart-line-item.render-after',
  (root, {buyerJourney, target}) => {
    const banner = root.createComponent(Banner);

    let quantity = target.current.quantity;

    target?.subscribe((newTarget) => {
      quantity = newTarget.quantity;
    });

    buyerJourney.intercept(
      ({canBlockProgress}) => {
        return canBlockProgress && quantity > 1
          ? {
              behavior: 'block',
              reason: 'limited stock',
              perform: (result) => {
                if (result.behavior === 'block') {
                  banner.appendChild(
                    'This item has a limit of one per customer.',
                  );
                  root.appendChild(banner);
                }
              },
            }
          : {
              behavior: 'allow',
              perform: () => {
                root.removeChild(banner);
              },
            };
      },
    );
  },
);

Using a session token with fetch()

Description

You can request a session token from Shopify to use on your application server. The contents of the token claims are signed using your shared app secret so you can trust the claims came from Shopify unaltered. > Note: You will need to [enable the `network_access` capability](/docs/api/checkout-ui-extensions/configuration#network-access) to use `fetch()`.

React

import {useEffect} from 'react';
import {
  reactExtension,
  Banner,
  useApi,
} from '@shopify/ui-extensions-react/checkout';

export default reactExtension(
  'purchase.checkout.block.render',
  () => <Extension />,
);

function Extension() {
  const {sessionToken} = useApi();

  useEffect(() => {
    async function queryApi() {
      // Request a new (or cached) session token from Shopify
      const token = await sessionToken.get();
      console.log('sessionToken.get()', token);

      const apiResponse = await fetchWithToken(
        token,
      );
      // Use your response
      console.log('API response', apiResponse);
    }

    function fetchWithToken(token) {
      const result = fetch(
        'https://myapp.com/api/session-token',
        {
          headers: {
            Authorization: `Bearer ${token}`,
          },
        },
      );
      return result;
    }

    queryApi();
  }, [sessionToken]);

  return (
    <Banner>See console for API response</Banner>
  );
}

JavaScript

import {
  extension,
  Banner,
  BlockStack,
} from '@shopify/ui-extensions/checkout';

export default extension(
  'purchase.checkout.block.render',
  (root, {sessionToken}) => {
    async function queryApi() {
      // Request a new (or cached) session token from Shopify
      const token = await sessionToken.get();
      console.log(token);

      const apiResponse = await fetchWithToken(
        token,
      );

      // Use your response
      console.log(apiResponse);
    }

    function fetchWithToken(token) {
      const result = fetch(
        'https://myapp.com/api/session-token',
        {
          headers: {
            Authorization: `Bearer ${token}`,
          },
        },
      );

      return result;
    }

    queryApi();

    root.appendChild(
      root.createComponent(Banner, {
        title: 'Session Token Extension',
      }),
    );
  },
);

Session token claims
Description
The contents of the token are signed using your shared app secret. The optional `sub` claim contains the customer's `gid` if they are logged in and your app has permission to read customer accounts. For example, a loyalty app that needs to check a customer's point balance can use the `sub` claim to verify the customer's account. > Caution: > Your app server can only trust the claims within the session token. It cannot use the token to trust the entire HTTP request. See [security considerations](/docs/api/checkout-ui-extensions/configuration#network-access) for details.
session-token.jwt
```
{
  // Shopify URL
  "dest": "store-name.myshopify.com",
  // The Client ID of your app
  "aud": "<clientId>",
  // When the token expires.  Set at 5 minutes.
  "exp": 1679954053,
  // When the token was actived
  "nbf": 1679953753,
  // When the token was issued
  "iat": 1679953753,
  // A unique identifier (a nonce) to prevent replay attacks
  "jti": "6c992878-dbaf-48d1-bb9d-6d9b59814fd1",
  // Optional claim present when a customer is logged in and your app has permissions to read customer data
  "sub": "gid://shopify/Customer/<customerId>"
}
```

Anchor to relatedRelated

APIsCheckoutApi

APIsOrderStatusApi

APIsCartLineItemApi

APIsPickupPointListApi

APIsPickupLocationListApi

APIsShippingOptionItemApi

APIsExtensionTargets

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