Google play内购凭证校验

Necessary steps:

1. Make an API project, from the API Access link in your Google Play console

2. Make a new service account, save the JSON private key that gets generated. You'll need to take this file to your server.

3. Press Done in the Play console's service account section to refresh and then grant access to the service account

4. Go get a google api client library for your server platform from https://developers.google.com/api-client-library

5. Use your particular platform's client library to build a service interface and directly read the result of your purchase verification.

You do not need to bother with authorization scopes, making custom requests calls, refreshing access tokens, etc. the api client library takes care of everything. Here's a python library usage example to verify a subscription:

First, install the google api client in your pipenv like this:

$ pipenv install google-api-python-client

Then you can set up api client credentials using the private key json file for authenticating the service account.

credentials = service_account.Credentials.from_service_account_file("service_account.json")

Now you can verify subscription purchases or product purchases using the library, directly.

#Build the "service" interface to the API you want
service = googleapiclient.discovery.build("androidpublisher", "v3", credentials=credentials)

#Use the token your API got from the app to verify the purchase
result = service.purchases().subscriptions().get(packageName="your.app.package.id", subscriptionId="sku.name", token="token-from-app").execute()
#result is a python object that looks like this ->
# {'kind': 'androidpublisher#subscriptionPurchase', 'startTimeMillis': '1534326259450', 'expiryTimeMillis': '1534328356187', 'autoRenewing': False, 'priceCurrencyCode': 'INR', 'priceAmountMicros': '70000000', 'countryCode': 'IN', 'developerPayload': '', 'cancelReason': 1, 'orderId': 'GPA.1234-4567-1234-1234..5', 'purchaseType': 0}

The documentation for the platform service interface for the play developer API is not linked in an easy to find way, for some it is downright hard to find. Here are the links for the popular platforms that I found:

Python | Java | .NET | PHP | NodeJS (Github TS) | Go (Github JSON)

大致流程：创建账号-》授权管理员权限-》生成json凭证-》前往google-api中心开启对应的api应用-》google client方式代码调用

转自：https://stackoverflow.com/questions/33850864/how-to-verify-purchase-for-android-app-in-server-side-google-play-in-app-billin

参考：https://blog.csdn.net/ITzaibadong/article/details/83056731