docs: update documentation to remove deprecated methods and align with expo-iap style

- Replace deprecated initialize() with initConnection()
- Remove requestSubscription() and unify with requestPurchase()
- Update Next Steps sections in iOS/Android setup docs
- Delete testing guide as requested
- Rename initPlatformState() to initIAP() for clarity

Author: hyochan

docs/docs/getting-started/android-setup.md

@@ -351,11 +351,9 @@ FlutterInappPurchase.purchaseUpdated.listen((purchase) async {
 
 ## Next Steps
 
-Once Android setup is complete:
-
-1. **[Basic Implementation](/docs/guides/basic-setup)** - Start implementing purchases
-2. **[Testing Guide](/docs/guides/testing)** - Test your implementation thoroughly
-3. **[Security Best Practices](/docs/guides/security)** - Secure your implementation
+- [Learn about iOS setup](./ios-setup)
+- [Explore getting started guide](./quickstart)
+- [Understand error codes](../api/error-codes)
 
 ---
 

docs/docs/getting-started/ios-setup.md

@@ -331,11 +331,9 @@ await FlutterInappPurchase.instance.requestPurchase(
 
 ## Next Steps
 
-Once iOS setup is complete:
-
-1. **[Basic Implementation](/docs/guides/basic-setup)** - Start implementing purchases
-2. **[Testing Guide](/docs/guides/testing)** - Test your implementation thoroughly
-3. **[App Store Guidelines](/docs/guides/app-store-guidelines)** - Ensure compliance
+- [Learn about Android setup](./android-setup)
+- [Explore getting started guide](./quickstart)
+- [Understand error codes](../api/error-codes)
 
 ---
 

docs/docs/getting-started/quickstart.md

@@ -42,7 +42,7 @@ class _SimpleStoreState extends State<SimpleStore> {
   @override
   void initState() {
     super.initState();
-    initPlatformState();
+    initIAP();
   }
 
   @override
@@ -53,10 +53,10 @@ class _SimpleStoreState extends State<SimpleStore> {
   }
 
   // Initialize the plugin
-  Future<void> initPlatformState() async {
+  Future<void> initIAP() async {
     // Initialize connection
-    var result = await FlutterInappPurchase.instance.initialize();
-    print('IAP initialized: $result');
+    await FlutterInappPurchase.instance.initConnection();
+    print('IAP connection initialized');
     
     // Set up purchase listeners
     _purchaseUpdatedSubscription = 
@@ -147,7 +147,13 @@ class _SimpleStoreState extends State<SimpleStore> {
   // Request a purchase
   Future<void> _requestPurchase(String productId) async {
     try {
-      await FlutterInappPurchase.instance.requestPurchase(productId);
+      await FlutterInappPurchase.instance.requestPurchase(
+        request: RequestPurchase(
+          ios: RequestPurchaseIOS(sku: productId),
+          android: RequestPurchaseAndroid(skus: [productId]),
+        ),
+        type: PurchaseType.inapp,
+      );
     } catch (e) {
       _showError('Purchase failed: $e');
     }
@@ -156,7 +162,13 @@ class _SimpleStoreState extends State<SimpleStore> {
   // Request a subscription
   Future<void> _requestSubscription(String productId) async {
     try {
-      await FlutterInappPurchase.instance.requestSubscription(productId);
+      await FlutterInappPurchase.instance.requestPurchase(
+        request: RequestPurchase(
+          ios: RequestPurchaseIOS(sku: productId),
+          android: RequestPurchaseAndroid(skus: [productId]),
+        ),
+        type: PurchaseType.subs,
+      );
     } catch (e) {
       _showError('Subscription failed: $e');
     }
@@ -280,10 +292,10 @@ class _SimpleStoreState extends State<SimpleStore> {
 
 ### 1. Initialization
 
-Always initialize the plugin before using any other methods:
+Always initialize the connection before using any other methods:
 
 ```dart
-await FlutterInappPurchase.instance.initialize();
+await FlutterInappPurchase.instance.initConnection();
 ```
 
 ### 2. Loading Products
@@ -316,6 +328,15 @@ FlutterInappPurchase.purchaseUpdated.listen((productItem) {
 FlutterInappPurchase.purchaseError.listen((error) {
   // Handle error
 });
+
+// Request a purchase
+await FlutterInappPurchase.instance.requestPurchase(
+  request: RequestPurchase(
+    ios: RequestPurchaseIOS(sku: 'product_id'),
+    android: RequestPurchaseAndroid(skus: ['product_id']),
+  ),
+  type: PurchaseType.inapp, // or PurchaseType.subs for subscriptions
+);
 ```
 
 ### 4. Platform Differences

docs/docs/getting-started/setup-android.md

@@ -232,6 +232,6 @@ try {
 
 ## Next Steps
 
-- [Quick Start](./quickstart) - Implement your first purchase
-- [Purchase Implementation](../guides/purchases) - Detailed purchase flow
-- [Testing Guide](../guides/testing) - Comprehensive testing strategies
+- [Learn about iOS setup](./setup-ios)
+- [Explore getting started guide](./quickstart)
+- [Understand error codes](../api/error-codes)

docs/docs/getting-started/setup-ios.md

@@ -161,6 +161,6 @@ validateReceipt(receiptBody);
 
 ## Next Steps
 
-- [Android Setup](./setup-android) - Configure Google Play Console
-- [Quick Start](./quickstart) - Implement your first purchase
-- [Testing Guide](../guides/testing) - Comprehensive testing strategies
+- [Learn about Android setup](./setup-android)
+- [Explore getting started guide](./quickstart)
+- [Understand error codes](../api/error-codes)

docs/docs/guides/subscriptions.md

@@ -82,9 +82,15 @@ class SubscriptionManager {
 ```dart
 Future<void> purchaseSubscription(String subscriptionId) async {
   try {
-    await FlutterInappPurchase.instance.requestSubscription(
-      subscriptionId,
-      obfuscatedAccountIdAndroid: await _getUserId(),
+    await FlutterInappPurchase.instance.requestPurchase(
+      request: RequestPurchase(
+        ios: RequestPurchaseIOS(sku: subscriptionId),
+        android: RequestPurchaseAndroid(
+          skus: [subscriptionId],
+          obfuscatedAccountIdAndroid: await _getUserId(),
+        ),
+      ),
+      type: PurchaseType.subs,
     );
     
     // Result will be delivered via purchaseUpdated stream
@@ -109,18 +115,30 @@ Future<void> purchaseSubscriptionAdvanced({
       // Android subscription upgrade/downgrade
       final currentToken = await _getCurrentSubscriptionToken(upgradeFromId);
       
-      await FlutterInappPurchase.instance.requestSubscription(
-        subscriptionId,
-        purchaseTokenAndroid: currentToken,
-        prorationModeAndroid: prorationMode ?? 
-            AndroidProrationMode.IMMEDIATE_AND_CHARGE_PRORATED_PRICE,
-        obfuscatedAccountIdAndroid: await _getUserId(),
+      await FlutterInappPurchase.instance.requestPurchase(
+        request: RequestPurchase(
+          ios: RequestPurchaseIOS(sku: subscriptionId),
+          android: RequestPurchaseAndroid(
+            skus: [subscriptionId],
+            purchaseTokenAndroid: currentToken,
+            replacementModeAndroid: prorationMode ?? 
+                AndroidProrationMode.IMMEDIATE_AND_CHARGE_PRORATED_PRICE,
+            obfuscatedAccountIdAndroid: await _getUserId(),
+          ),
+        ),
+        type: PurchaseType.subs,
       );
     } else {
       // New subscription or iOS
-      await FlutterInappPurchase.instance.requestSubscription(
-        subscriptionId,
-        obfuscatedAccountIdAndroid: await _getUserId(),
+      await FlutterInappPurchase.instance.requestPurchase(
+        request: RequestPurchase(
+          ios: RequestPurchaseIOS(sku: subscriptionId),
+          android: RequestPurchaseAndroid(
+            skus: [subscriptionId],
+            obfuscatedAccountIdAndroid: await _getUserId(),
+          ),
+        ),
+        type: PurchaseType.subs,
       );
     }
   } catch (e) {
@@ -192,17 +210,29 @@ class SubscriptionChangeHandler {
         final currentToken = await _getCurrentSubscriptionToken(fromProductId);
         
         if (currentToken != null) {
-          await FlutterInappPurchase.instance.requestSubscription(
-            toProductId,
-            purchaseTokenAndroid: currentToken,
-            prorationModeAndroid: AndroidProrationMode.IMMEDIATE_AND_CHARGE_PRORATED_PRICE,
+          await FlutterInappPurchase.instance.requestPurchase(
+            request: RequestPurchase(
+              ios: RequestPurchaseIOS(sku: toProductId),
+              android: RequestPurchaseAndroid(
+                skus: [toProductId],
+                purchaseTokenAndroid: currentToken,
+                replacementModeAndroid: AndroidProrationMode.IMMEDIATE_AND_CHARGE_PRORATED_PRICE,
+              ),
+            ),
+            type: PurchaseType.subs,
           );
         } else {
           throw Exception('Current subscription not found');
         }
       } else {
         // iOS handles this automatically through subscription groups
-        await FlutterInappPurchase.instance.requestSubscription(toProductId);
+        await FlutterInappPurchase.instance.requestPurchase(
+          request: RequestPurchase(
+            ios: RequestPurchaseIOS(sku: toProductId),
+            android: RequestPurchaseAndroid(skus: [toProductId]),
+          ),
+          type: PurchaseType.subs,
+        );
       }
     } catch (e) {
       print('Subscription upgrade failed: $e');
@@ -484,7 +514,13 @@ class IOSSubscriptionHandler {
   Future<void> handleSubscriptionGroup(String newSubscriptionId) async {
     // iOS automatically manages subscription groups
     // Users can only have one active subscription per group
-    await FlutterInappPurchase.instance.requestSubscription(newSubscriptionId);
+    await FlutterInappPurchase.instance.requestPurchase(
+      request: RequestPurchase(
+        ios: RequestPurchaseIOS(sku: newSubscriptionId),
+        android: RequestPurchaseAndroid(skus: [newSubscriptionId]),
+      ),
+      type: PurchaseType.subs,
+    );
   }
   
   // Handle promotional offers
@@ -524,9 +560,15 @@ class AndroidSubscriptionHandler {
     required String subscriptionId,
     required int offerIndex,
   }) async {
-    await FlutterInappPurchase.instance.requestSubscription(
-      subscriptionId,
-      offerTokenIndex: offerIndex,
+    await FlutterInappPurchase.instance.requestPurchase(
+      request: RequestPurchase(
+        ios: RequestPurchaseIOS(sku: subscriptionId),
+        android: RequestPurchaseAndroid(
+          skus: [subscriptionId],
+          subscriptionOffers: [{offerToken: offerIndex.toString()}],
+        ),
+      ),
+      type: PurchaseType.subs,
     );
   }
   
@@ -539,10 +581,16 @@ class AndroidSubscriptionHandler {
     final oldToken = await _getCurrentSubscriptionToken(oldSubscriptionId);
     
     if (oldToken != null) {
-      await FlutterInappPurchase.instance.requestSubscription(
-        newSubscriptionId,
-        purchaseTokenAndroid: oldToken,
-        prorationModeAndroid: prorationMode,
+      await FlutterInappPurchase.instance.requestPurchase(
+        request: RequestPurchase(
+          ios: RequestPurchaseIOS(sku: newSubscriptionId),
+          android: RequestPurchaseAndroid(
+            skus: [newSubscriptionId],
+            purchaseTokenAndroid: oldToken,
+            replacementModeAndroid: prorationMode,
+          ),
+        ),
+        type: PurchaseType.subs,
       );
     }
   }