PKPaymentErrorKey
Additional details about an error on the Apple Pay sheet.
Declaration
struct PKPaymentErrorKeyDiscussion
Use payment error keys if you are creating a payment error without using one of the convenience methods in PKPaymentRequest (such as paymentBillingAddressInvalidError(withKey:localizedDescription:) or others).
The payment error keys indicate a specific field that has an error, for example, the street field of an address.