feat: Add Stripe methods.

packages/katana_functions/example/pubspec.lock

@@ -348,20 +348,19 @@ packages:
     source: hosted
     version: "6.6.2"
   katana:
-    dependency: transitive
+    dependency: "direct overridden"
     description:
-      name: katana
-      sha256: "99e37bec02e32244b575b8459d7c5108297376e4f36d7da1a40ab22fb701e97d"
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.0.14"
+      path: "../../katana"
+      relative: true
+    source: path
+    version: "2.0.1"
   katana_functions:
     dependency: "direct main"
     description:
       path: ".."
       relative: true
     source: path
-    version: "1.1.26"
+    version: "2.0.1"
   lints:
     dependency: transitive
     description:
@@ -633,4 +632,3 @@ packages:
     version: "3.1.2"
 sdks:
   dart: ">=3.0.0-417 <4.0.0"
-  flutter: ">=2.0.0"

packages/katana_functions/lib/adapter/runtime_functions_adapter.dart

@@ -39,4 +39,11 @@ class RuntimeFunctionsAdapter extends FunctionsAdapter {
     AgoraClientRole clientRole = AgoraClientRole.audience,
   }) =>
       Future.value("");
+
+  @override
+  Future<TStripeResponse?>
+      stipe<TStripeResponse extends StripePurchaseActionResponse>({
+    required StripePurchaseAction<TStripeResponse> action,
+  }) =>
+          action.execute((map) async => {});
 }

packages/katana_functions/lib/katana_functions.dart

@@ -22,3 +22,4 @@ part 'src/functions.dart';
 part 'src/functions_adapter.dart';
 part 'src/openai_chat_gpt_message.dart';
 part 'src/agora_client_role.dart';
+part 'src/stripe.dart';

packages/katana_functions/lib/src/functions.dart

@@ -128,4 +128,27 @@ class Functions extends ChangeNotifier {
       rethrow;
     }
   }
+
+  /// Functions for server-side processing used by Stripe.
+  ///
+  /// [StripePurchaseAction] and [StripePurchaseActionResponse] must be prepared for each mode.
+  ///
+  /// Stripeで利用するサーバー側の処理を行うためのFunctions。
+  ///
+  /// 各モードに応じた[StripePurchaseAction]と[StripePurchaseActionResponse]を用意する必要があります。
+  Future<TStripeResponse?>
+      stipe<TStripeResponse extends StripePurchaseActionResponse>({
+    required StripePurchaseAction<TStripeResponse> action,
+  }) async {
+    try {
+      final res = await FunctionsAdapter.primary.stipe(
+        action: action,
+      );
+      notifyListeners();
+      return res;
+    } catch (e) {
+      debugPrint(e.toString());
+      rethrow;
+    }
+  }
 }

packages/katana_functions/lib/src/functions_adapter.dart

@@ -81,6 +81,18 @@ abstract class FunctionsAdapter {
     required String channelName,
     AgoraClientRole clientRole = AgoraClientRole.audience,
   });
+
+  /// Functions for server-side processing used by Stripe.
+  ///
+  /// [StripePurchaseAction] and [StripePurchaseActionResponse] must be prepared for each mode.
+  ///
+  /// Stripeで利用するサーバー側の処理を行うためのFunctions。
+  ///
+  /// 各モードに応じた[StripePurchaseAction]と[StripePurchaseActionResponse]を用意する必要があります。
+  Future<TStripeResponse?>
+      stipe<TStripeResponse extends StripePurchaseActionResponse>({
+    required StripePurchaseAction<TStripeResponse> action,
+  });
 }
 
 /// [FunctionsAdapter] for the entire app by placing it on top of [MaterialApp], etc.

packages/katana_functions/lib/src/stripe.dart

@@ -0,0 +1,70 @@
+part of katana_functions;
+
+/// Stripe actions used in Functions.
+///
+/// Inherit and use.
+///
+/// Functionsで用いるStripeのアクション。
+///
+/// 継承して使ってください。
+abstract class StripePurchaseAction<
+    TResponse extends StripePurchaseActionResponse> {
+  /// Stripe actions used in Functions.
+  ///
+  /// Inherit and use.
+  ///
+  /// Functionsで用いるStripeのアクション。
+  ///
+  /// 継承して使ってください。
+  const StripePurchaseAction();
+
+  /// Mode of execution on the server side.
+  ///
+  /// サーバー側で実行するモード。
+  String get mode;
+
+  /// Convert to [DynamicMap] to pass values to the server side.
+  ///
+  /// サーバー側に値を渡すために[DynamicMap]に変換します。
+  DynamicMap? toMap();
+
+  /// Converts the value returned from the server side to [TResponse].
+  ///
+  /// サーバー側から返却された値を[TResponse]に変換します。
+  TResponse? toResponse(DynamicMap map);
+
+  /// The value is actually passed to the server side for execution.
+  ///
+  /// 実際にサーバー側に値を渡して実行します。
+  Future<TResponse?> execute(
+    Future<DynamicMap?> Function(DynamicMap? map) callback,
+  ) async {
+    final input = toMap();
+    final res = await callback.call({
+      "mode": mode,
+      if (input != null) ...input,
+    });
+    if (res.isEmpty) {
+      return null;
+    }
+    return toResponse(res!);
+  }
+}
+
+/// Class for defining the value returned when executed by [StripePurchaseAction].
+///
+/// Inherit and use.
+///
+/// [StripePurchaseAction]で実行されたときに返却された値を定義するためのクラス。
+///
+/// 継承して使ってください。
+abstract class StripePurchaseActionResponse {
+  /// Class for defining the value returned when executed by [StripePurchaseAction].
+  ///
+  /// Inherit and use.
+  ///
+  /// [StripePurchaseAction]で実行されたときに返却された値を定義するためのクラス。
+  ///
+  /// 継承して使ってください。
+  const StripePurchaseActionResponse();
+}

packages/katana_functions/pubspec.lock

@@ -209,11 +209,10 @@ packages:
   katana:
     dependency: "direct main"
     description:
-      name: katana
-      sha256: "99e37bec02e32244b575b8459d7c5108297376e4f36d7da1a40ab22fb701e97d"
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.0.14"
+      path: "../katana"
+      relative: true
+    source: path
+    version: "2.0.1"
   lints:
     dependency: transitive
     description:

packages/katana_functions_firebase/lib/adapter/firebase_functions_adapter.dart

@@ -172,4 +172,22 @@ class FirebaseFunctionsAdapter extends FunctionsAdapter {
       rethrow;
     }
   }
+
+  @override
+  Future<TStripeResponse?>
+      stipe<TStripeResponse extends StripePurchaseActionResponse>({
+    required StripePurchaseAction<TStripeResponse> action,
+  }) async {
+    await FirebaseCore.initialize(options: options);
+    try {
+      return await action.execute((map) async {
+        final res =
+            await functions.httpsCallable("stripe").call<DynamicMap>(map);
+        return res.data;
+      });
+    } catch (e) {
+      debugPrint(e.toString());
+      rethrow;
+    }
+  }
 }

packages/katana_functions_firebase/pubspec.lock

@@ -307,27 +307,24 @@ packages:
   katana:
     dependency: "direct main"
     description:
-      name: katana
-      sha256: "99e37bec02e32244b575b8459d7c5108297376e4f36d7da1a40ab22fb701e97d"
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.0.14"
+      path: "../katana"
+      relative: true
+    source: path
+    version: "2.0.1"
   katana_firebase:
     dependency: "direct main"
     description:
-      name: katana_firebase
-      sha256: "4feffdbc241bed0774ba359ab1e2ef394d080cbcf05629a212a7aa2605bd4afb"
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.1.21"
+      path: "../katana_firebase"
+      relative: true
+    source: path
+    version: "2.0.1"
   katana_functions:
     dependency: "direct main"
     description:
-      name: katana_functions
-      sha256: "5dca964b2a90f708616130a90f1ab60ed0b631c34f114658918e7bb844861260"
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.1.26"
+      path: "../katana_functions"
+      relative: true
+    source: path
+    version: "2.0.1"
   lints:
     dependency: transitive
     description: