Apple Pay Drop-in integration

If your integration uses iOS Drop-in v5.0.0 or later, include the following when you configure Drop-in:

Parameter name	Description
merchantIdentifier	Your Apple Pay merchant identifier.
requiredBillingContactFields Ignored on iOS 10 and later.	The fields required for the billing contact.
requiredShippingContactFields Ignored on iOS 10 and later.	The fields required for the shipping contact.

//Initialize a Drop-in configuration object.
let dropInConfiguration = DropInComponent.Configuration()
//Set configuration for Apple Pay.
dropInConfiguration.applePay = .init(payment: applePayment,
                               merchantIdentifier: YOUR_APPLE_PAY_MERCHANT_ID,
                               requiredBillingContactFields: ... , //Your required billing contact fields.
                               requiredShippingContactFields = ... ) //Your required shipping contact fields.

If your integration uses Drop-in v4.10.0 or earlier, include following configuration for Apple Pay:

Parameter name	Description
merchantIdentifier	Your Apple Pay merchant identifier.
payment	The amount, currency, and country code of the payment.
summaryItems	The items included in the purchase.

// Import this to use the PKPaymentSummaryItem class
// See documentation https://developer.apple.com/documentation/passkit/pkpaymentsummaryitem
import PassKit
//Submit the payment details here, including the amount, currency, and country code
let payment = Payment(amount: Amount(value: 15000, currencyCode: "EUR"),
                      countryCode: "NL")
// A set of line items that explain recurring payments, additional charges, and discounts.
// See Apple Pay documentation for sample values.
// https://developer.apple.com/documentation/apple_pay_on_the_web/applepaypaymentrequest/1916120-lineitems
let summaryItems = [
                     PKPaymentSummaryItem(label: "Jeans", amount: 98.99, type: .final),
                     PKPaymentSummaryItem(label: "Bag", amount: 55.46, type: .final),
                     PKPaymentSummaryItem(label: "Discount", amount: -4.45, type: .final),
                     PKPaymentSummaryItem(label: "Total", amount: 150, type: .final)
                   ]
// See Apple Pay documentation https://docs.adyen.com/payment-methods/apple-pay/enable-apple-pay#create-merchant-identifier
let merchantIdentifier = "merchant.com.{YOUR_MERCHANT_IDENTIFIER}"
let applePayConfiguration = ApplePayComponent.Configuration(summaryItems: summaryItems,
                                                            merchantIdentifier: merchantIdentifier)

//Assign the Apple Pay configuration object you created to your instance of Drop-in.
dropInConfiguration.applePay = applePayConfiguration

If your integration uses iOS Drop-in v5.0.0 or later, you can optionally include the following when you configure the Drop-in:

Parameter name	Description
billingContact	A prefilled billing address.
shippingContact	A prefilled shipping address.
allowOnboarding	Set to true to let the shopper add cards to their Apple Pay wallet if they haven't already done so. Otherwise, the shopper can't use Apple Pay. Default: false.
shippingType	The type of shipping displayed, for example Pick Up, Ship To, or Deliver To. This is localized. Default: PKShippingTypeShipping = .shipping.
allowShippingContact	Set to false to prevent the shopper from changing the shipping contact field before showing the payment form. Default: true.
shippingMethods	An array of supported shipping methods.
applicationData	Additional information that you provide about the payment request. For example, an order number or cart identifier. This is signed and included in the resulting PKPaymentToken.
supportedCountries	Only allow payments from cards issued in specific countries. This is a list of ISO 3166 country codes.
supportsCouponCode	Set to true to let the shopper enter a coupon code which gets validated. Default: false.
couponCode	A coupon code that has already been applied to the payment request.

If your integration uses Drop-in v4.10.0 or earlier, there's no additional optional configuration.