인앱결제

결제 Flow

1. 인증

구글 클라우드 플랫폼에서 서비스 계정 우측의 서비스 계정 관리를 누른 후 키 관리 > 키 추가 > 새 키 만들기

            GoogleCredentials credentials = GoogleCredentials
                .fromStream(new FileInputStream("C:\\study\\inapp\\src\\main\\resources\\credentials.json"))
                .createScoped(AndroidPublisherScopes.ANDROIDPUBLISHER);
            credentials.refreshIfExpired();

            AccessToken token = credentials.refreshAccessToken();
            System.out.println(token.toString());

인증 결과

AccessToken{tokenValue=ya29, expirationTimeMillis=1651537806287}

2. 영수증 검증

https://developers.google.com/android-publisher/api-ref/rest/v3/purchases.products/get

	AndroidPublisher publisher = new AndroidPublisher.Builder(
                GoogleNetHttpTransport.newTrustedTransport(),
                GsonFactory.getDefaultInstance(),
                new HttpCredentialsAdapter(credentials)
            ).setApplicationName("example").build();

            AndroidPublisher.Purchases.Products.Get get = publisher.purchases().products().get(packageName, productId, purchaseToken);
            ProductPurchase productPurchase = get.execute();
            System.out.println(productPurchase.toPrettyString());

            // 인앱 상품의 소비 상태. 0 아직 소비 안됨(Yet to be consumed) / 1 소비됨(Consumed)
            Integer consumptionState = productPurchase.getConsumptionState();

            // 개발자가 지정한 임의 문자열 정보
            String developerPayload = productPurchase.getDeveloperPayload();

            // 구매 상태. 0 구매완료 / 1 취소됨
            Integer purchaseState = productPurchase.getPurchaseState();

            // 상품이 구매된 시각. 타임스탬프 형태
            Long purchaseTimeMillis = productPurchase.getPurchaseTimeMillis();

검증 결과

{
  "acknowledgementState": 1,
  "consumptionState": 1,
  "developerPayload": "",
  "kind": "androidpublisher#productPurchase",
  "orderId": "GPA.3338-0568-9500-67910",
  "purchaseState": 1,
  "purchaseTimeMillis": "1650347811376",
  "purchaseType": 0,
  "regionCode": "KR"
}

3. 결재 취소

https://developers.google.com/android-publisher/api-ref/rest/v3/orders/refund

            Void refund = publisher.orders().refund(packageName, "GPA.3338-0568-9500-67910").execute();
            System.out.println(refund);

4. 무효화된 결재내역

https://developers.google.com/android-publisher/api-ref/rest/v3/purchases.voidedpurchases/list

            VoidedPurchasesListResponse voidedPurchasesListResponse = publisher.purchases()
                .voidedpurchases()
                .list(packageName)
                .execute();
            System.out.println(voidedPurchasesListResponse.toPrettyString());

무효화된 결재내역 결과

{
  "voidedPurchases": [
    {
      "kind": "androidpublisher#voidedPurchase",
      "orderId": "GPA.3308-4116-2515-42303",
      "purchaseTimeMillis": "1651123458478",
      "purchaseToken": "kakeidmecebghakcdjbihlfe.AO-J1OzI-2qmFvN78_QxyYuRWRhyoq0NAwIMDvET3nk9hGm-bqPZMmkVmckRc5OvQ5M7dGv5TXOaJEMU5UNcNrtSTgageabDImZyp1OyTccceCldPf5X2ow",
      "voidedReason": 1,
      "voidedSource": 1,
      "voidedTimeMillis": "1651124870903"
    }
  ]
}

Google Play 결제 시스템 주요 기능 소개 및 도입 가이드

• Play Console 고객센터: 결제 프로필 만들기
  • https://support.google.com/googleplay/android-developer/answer/7161426?hl=ko
• Play Console 고객센터: 인앱 결제 테스트하기
  • https://support.google.com/googleplay/android-developer/answer/6062777?hl=ko
• Android 개발자 YouTube 채널: Subscription 101 - Real Time Developer Notification
  • https://www.youtube.com/watch?v=9Ta2chg_Ak4
• Google Play Medium 블로그: Future proof your subscription business
  • https://medium.com/googleplaydev/future-proof-your-subscription-business-e7c27a81a0ce
• Android Developers Medium 블로그: Subscriptions 101 for Android apps
  • https://medium.com/androiddevelopers/subscriptions-101-for-android-apps-b7005a7e93a6
• Google Play Medium 블로그: Working with Google Play Billing
  • https://medium.com/googleplaydev/working-with-google-play-billing-part-1-387677bd632b
• Android 개발자 사이트: Google Play 결제 시스템
  • https://developer.android.com/google/play/billing/getting-ready
• Github: Google Play 결제 시스템 적용 예시
  • https://github.com/android/play-billing-samples

개발자 제공 결제 시스템 시작 가이드

• Google 개발자 블로그: 대한민국 이용자를 위한 개발자 제공 결제 시스템 적용
  • https://developers-kr.googleblog.com/2021/11/enabling-alternative-billing-in-korea-ko.html
• Play Console 고객센터: Google Play 결제 요구사항 관련 변경
  • https://support.google.com/googleplay/android-developer/answer/11222040?hl=ko
• Play Console 고객센터: 추가 인앱 결제 시스템 확인 양식
  • https://support.google.com/googleplay/android-developer/contact/additional_billing_system?hl=ko
• Android 개발자 사이트: 개발자 제공 인앱 결제 시스템 임시 UX 가이드라인
  • https://developer.android.com/google/play/billing/billing-choice
• Play Console 고객센터: Google Play 결제 정책 이해
  • https://support.google.com/googleplay/android-developer/answer/10281818#zippy=%2Ccan-i-communicate-with-my-users-about-alternative-ways-to-pay
• Play 미디어 경험 프로그램
  • https://play.google.com/intl/ko/console/about/mediaprogram/

Google Play 커머스 세미나 영상 다시보기 

• Session 1 : Google Play 결제 시스템 주요 기능 소개 및 도입 가이드
  • https://developersonair.withgoogle.com/events/playbilling_korea/watch?talk=session01
• Session 2 : 개발자 제공 결제 시스템 시작 가이드
  • https://developersonair.withgoogle.com/events/playbilling_korea/watch?talk=session02
• 실시간 Q&A
  • https://developersonair.withgoogle.com/events/playbilling_korea?talk=qna