Apple Pay configuration. Required on a PaymentSession when invoking startApplePay, or when offering Apple Pay through presentEntirePaymentFlow on iOS.
PaymentSession
merchantIdentifier must match the Apple Pay merchant ID configured in the app's entitlements.
merchantIdentifier
Optional
Apple Pay configuration. Required on a
PaymentSessionwhen invoking startApplePay, or when offering Apple Pay through presentEntirePaymentFlow on iOS.merchantIdentifiermust match the Apple Pay merchant ID configured in the app's entitlements.