feat: add onbehalfof to cardfield

example/ios/Runner/AppDelegate.swift

@@ -1,7 +1,7 @@
 import UIKit
 import Flutter
 
-@UIApplicationMain
+@main
 @objc class AppDelegate: FlutterAppDelegate {
   override func application(
     _ application: UIApplication,

packages/stripe/lib/src/widgets/card_field.dart

@@ -31,6 +31,7 @@ class CardField extends StatefulWidget {
     this.postalCodeHintText,
     this.controller,
     this.preferredNetworks,
+    this.onBehalfOf,
     this.androidPlatformViewRenderType =
         AndroidPlatformViewRenderType.expensiveAndroidView,
   });
@@ -50,6 +51,9 @@ class CardField extends StatefulWidget {
   /// Color of the cursor when a field gets focus.
   final Color? cursorColor;
 
+  /// The account (if any) for which the funds of the intent are intended.
+  final String? onBehalfOf;
+
   /// Whether or not to show the postalcode field in the form.
   ///
   /// Defaults is `false`. If your configuration in Stripe requires a postalcode
@@ -197,6 +201,7 @@ class _CardFieldState extends State<CardField> {
               focusNode: _node,
               style: style,
               placeholder: placeholder,
+              onBehalfOf: widget.onBehalfOf,
               enablePostalCode: widget.enablePostalCode,
               countryCode: widget.countryCode,
               dangerouslyGetFullCardDetails:
@@ -295,6 +300,7 @@ class _MethodChannelCardField extends StatefulWidget {
     this.preferredNetworks,
     this.dangerouslyGetFullCardDetails = false,
     this.dangerouslyUpdateFullCardDetails = false,
+    this.onBehalfOf,
     this.autofocus = false,
   })  : assert(constraints == null || constraints.debugAssertIsValid()),
         constraints = (width != null || height != null)
@@ -317,6 +323,7 @@ class _MethodChannelCardField extends StatefulWidget {
   final bool dangerouslyUpdateFullCardDetails;
   final AndroidPlatformViewRenderType androidPlatformViewRenderType;
   final List<CardBrand>? preferredNetworks;
+  final String? onBehalfOf;
 
   // This is used in the platform side to register the view.
   static const _viewType = 'flutter.stripe/card_field';
@@ -405,6 +412,7 @@ class _MethodChannelCardFieldState extends State<_MethodChannelCardField>
       'placeholder': placeholder.toJson(),
       'postalCodeEnabled': widget.enablePostalCode,
       'countryCode': widget.countryCode,
+      if (widget.onBehalfOf != null) 'onBehalfOf': widget.onBehalfOf,
       if (widget.preferredNetworks != null)
         'preferredNetworks':
             widget.preferredNetworks?.map((e) => e.brandValue).toList(),

packages/stripe_android/android/src/main/kotlin/com/flutter/stripe/StripeSdkCardPlatformView.kt

@@ -38,6 +38,9 @@ class StripeSdkCardPlatformView(
         if (creationParams?.containsKey("postalCodeEnabled") == true) {
             stripeSdkCardViewManager.setPostalCodeEnabled(cardView, creationParams["postalCodeEnabled"] as Boolean)
         }
+        if(creationParams?.containsKey("onBehalfOf")==true){
+            stripeSdkCardViewManager.setOnBehalfOf(cardView, creationParams["onBehalfOf"] as String)
+        }
         if (creationParams?.containsKey("countryCode") == true) {
             stripeSdkCardViewManager.setCountryCode(cardView, creationParams["countryCode"] as? String)
         }

packages/stripe_ios/ios/Classes/CardFieldFactory.swift

@@ -137,6 +137,10 @@ class CardFieldPlatformView: NSObject, FlutterPlatformView, STPPaymentCardTextFi
             cardField.disabled = disabled
         }
 
+        if let onBehalfOf = arguments["onBehalfOf"] as? String{
+            cardField.onBehalfOf = onBehalfOf
+        }
+
         if let preferredNetworks = arguments["preferredNetworks"] as? Array<Int>{
             cardField.preferredNetworks = preferredNetworks
         }