一、以下是消耗类和非消耗类的正常流程（订阅类的不太清楚）
- 1.进入充值页面，向app server获取productIdList及展示信息。
- 2.用productIdList调iapsdk获取productDetailList（用来发起支付的参数）。
- 3.用户选择一个productDetail，然后调iap sdk发起支付。
- 4.监听到apple支付成功，将purshaseId、receipt发给app server。
- 5.app server 向apple server发起校验请求，比对in_app数组里对应的purshaseId的校验结果，返回给第4步app的请求。
- 6.app端收到成功结果后finish掉该productDetail。
二、以下是应对异常情况
- a.上面第4步断网或者app闪退。
- b.上面第6步因为网络原因没有finish该productDetail。
针对第a种异常：
- i.下次进入app用iap sdk获取未处理(未finish)栈里的productDetail(这个flutter iap plugin没有提供方法，我自己fork后加了该方法)（注意这里是单数，只有一个未处理），然后接着走正常流程的4、5、6。
- ii.再次购买时，先执行i的步骤，确保处理完毕了才能发起第二笔支付，否则获取未处理productDetail为复数时会导致receipt紊乱导致校验失败造成卡单（未处理栈里一直在）。
针对第b种异常：
- a的异常处理会让app server重复校验，所以这里需要app server做一下记录，校验过的结果存在数据库里，再发起该purshaseId校验直接返回结果，避免重复增加余额。
三、编码参考
环境：
flutter版本: v1.9.1+hotfix.4
插件依赖：in_app_purchase:
git:
url: https://github.com/qq326646683/plugins.git
ref: 13df320b6112a3a4abfbec47bba53b2f95402637
path: packages/in_app_purchase
balance_page.dart:
@override
void initState() {
InappPurchaseService.getInstance().initListener(context);
super.initState();
/// 步骤1
ResponseResult<List<AppleProduct>> response = await OrderService.getInstance().getAppleProduct();
if (response.isSuccess) {
/// 步骤2
_initStoreInfo(response.data);
}
}
@override
void dispose() {
InappPurchaseService.getInstance().removeListener();
super.dispose();
}
_initStoreInfo(List<AppleProduct> appProductList) async {
productDetailList = await InappPurchaseService.getInstance().initStoreInfo(context, appProductList);
}
build() {
...
SMClickButton(
/// 步骤3
onTap: () => InappPurchaseService.getInstance().toCharge(productDetailList, selectIndex, context),
child: Container(
width: _Style.btnContainerW,
height: _Style.bottomContainer,
color: SMColors.btnColorfe373c,
alignment: Alignment.center,
child: Text('确认充值', style: SMTxtStyle.colorfffdp16,),
),
),
}
inapp_purchase_service.dart：
initListener(BuildContext context) {
final Stream purchaseUpdates = InAppPurchaseConnection.instance.purchaseUpdatedStream;
_subscription = purchaseUpdates.listen((purchases) {
_listenToPurchaseUpdated(context, purchases);
}, onDone: () => _subscription.cancel(), onError: (error) => LogUtil.i(InappPurchaseService.sName, "error:" + error));
}
void _listenToPurchaseUpdated(BuildContext context, List<PurchaseDetails> purchaseDetailsList) {
purchaseDetailsList.forEach((PurchaseDetails purchaseDetails) async {
if (purchaseDetails.status == PurchaseStatus.pending) {
LogUtil.i(InappPurchaseService.sName, 'PurchaseStatus.pending');
LoadingUtil.show(context);
} else {
LoadingUtil.hide();
if (purchaseDetails.status == PurchaseStatus.error) {
ToastUtil.showRed("交易取消或失败");
} else if (purchaseDetails.status == PurchaseStatus.purchased) {
ToastUtil.showGreen("交易成功,正在校验");
LogUtil.i(InappPurchaseService.sName, "purchaseDetails.purchaseID:" + purchaseDetails.purchaseID);
LogUtil.i(InappPurchaseService.sName, "purchaseDetails.serverVerificationData:" + purchaseDetails.verificationData.serverVerificationData);
/// 步骤4
_verifyPurchase(purchaseDetails, needLoadingAndToast: true, context: context);
}
}
});
}
// return bool needLock
Future<bool> _verifyPurchase(PurchaseDetails purchaseDetails, {bool needLoadingAndToast = false, BuildContext context}) async {
Map param = {
"transactionId" : purchaseDetails.purchaseID,
"receipt": purchaseDetails.verificationData.serverVerificationData,
};
if (needLoadingAndToast) LoadingUtil.show(context);
ResponseResult<dynamic> response = await ZBDao.charge(param);
if (needLoadingAndToast) LoadingUtil.hide();
if (response.isSuccess) {
if (response.data == true) {
/// 步骤6
await InAppPurchaseConnection.instance.completePurchase(purchaseDetails);
if (needLoadingAndToast) ToastUtil.showGreen('充值成功');
OrderService.getInstance().getBalance();
return false;
} else {
if (needLoadingAndToast) ToastUtil.showRed('充值失败');
return true;
}
} else {
LogUtil.i(InappPurchaseService.sName, '处理失败');
return true;
}
}
Future<List<ProductDetails>> initStoreInfo(BuildContext context, List<AppleProduct> appleProductList) async {
final bool isAvailable = await _connection.isAvailable();
if (!isAvailable) {
return null;
}
List<String> productIdList = [];
for(AppleProduct appleProduct in appleProductList) {
productIdList.add(appleProduct.productId);
}
LoadingUtil.show(context);
ProductDetailsResponse productDetailResponse = await _connection.queryProductDetails(productIdList.toSet());
LoadingUtil.hide();
if (productDetailResponse.error != null) {
return null;
}
if (productDetailResponse.productDetails.isEmpty) {
return null;
}
return productDetailResponse.productDetails;
}
void toCharge(List<ProductDetails> productDetailList, int selectIndex, BuildContext context) async {
if (productDetailList == null) {
ToastUtil.showRed("productDetailList为空");
return;
}
LoadingUtil.show(context);
/// a异常ii步骤
bool needLock = await checkUndealPurshase();
LoadingUtil.hide();
if (needLock) {
ToastUtil.showRed("有订单未处理");
return;
}
final PurchaseParam purchaseParam = PurchaseParam(productDetails:productDetailList[selectIndex]);
InAppPurchaseConnection.instance.buyConsumable(purchaseParam: purchaseParam);
}
// return bool needLock
Future<bool> checkUndealPurshase() async {
/// a.异常i步骤，这里在进入app后，用户获取登录状态后调用
LogUtil.i(InappPurchaseService.sName, '获取未处理list');
try {
List<PurchaseDetails> purchaseDetailsList = await _connection.getUndealPurchases();
if (purchaseDetailsList.isEmpty) return false;
LogUtil.i(InappPurchaseService.sName, '处理数组最后一个');
PurchaseDetails purchaseDetails = purchaseDetailsList[purchaseDetailsList.length - 1];
return _verifyPurchase(purchaseDetails);
} catch(e) {
ToastUtil.showRed('同步苹果支付信息失败');
return true;
}
}
完结，撒花🎉
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