CHECK-384: Enable Google Pay support in Stripe PaymentSheet behind a feature gate

app/build.gradle

@@ -249,7 +249,9 @@ dependencies {
     kapt "com.google.dagger:dagger-compiler:$dagger_version"
     implementation 'com.jakewharton:process-phoenix:3.0.0'
     implementation "com.jakewharton.timber:timber:5.0.1"
-    implementation 'com.stripe:stripe-android:23.17.1'
+    implementation 'com.stripe:stripe-android:23.20.0'
+    // Google Pay - to access and override `GooglePayAvailabilityClient`
+    implementation 'com.google.android.gms:play-services-wallet:20.0.0'
 
     final okhttp_version = '5.1.0'
     implementation "com.squareup.okhttp3:logging-interceptor:$okhttp_version"

app/src/main/java/com/kickstarter/KSApplication.kt

@@ -23,6 +23,7 @@ import com.kickstarter.libs.featureflag.StatsigClient
 import com.kickstarter.libs.featureflag.StatsigException
 import com.kickstarter.libs.utils.ApplicationLifecycleUtil
 import com.kickstarter.libs.utils.Secrets
+import com.kickstarter.utils.GooglePayAvailabilityUtil
 import com.kickstarter.viewmodels.InitializationState
 import io.reactivex.exceptions.OnErrorNotImplementedException
 import io.reactivex.exceptions.UndeliverableException
@@ -70,6 +71,9 @@ open class KSApplication : MultiDexApplication(), IKSApplicationComponent, Image
     @Inject
     lateinit var statsigClient: StatsigClient
 
+    @Inject
+    lateinit var apiEndpoint: ApiEndpoint
+
     /**
      * - A CoroutineScope tied to the Application lifecycle
      *  used to initialize dependencies that require coroutines and early on network calls.
@@ -112,6 +116,10 @@ open class KSApplication : MultiDexApplication(), IKSApplicationComponent, Image
             plant(Timber.DebugTree())
         }
 
+        if (apiEndpoint != ApiEndpoint.PRODUCTION) {
+            GooglePayAvailabilityUtil.overrideGooglePayAvailabilityClient()
+        }
+
         createErrorHandler()
         initialize(applicationContext, ffClient) { this.initializeDependencies() }
     }

app/src/main/java/com/kickstarter/libs/featureflag/StatsigClient.kt

@@ -36,7 +36,8 @@ enum class StatsigGateKey(val key: String) {
     ANDROID_PRELAUNCH_SOCIAL_SHARE("android_social_share"),
     ANDROID_PRELAUNCH_PROJECT_STORY("android_pre-launch_project_story"),
     ANDROID_OPEN_CALLS("android_open_calls"),
-    ANDROID_REPORT_PROJECT("android_report_project")
+    ANDROID_REPORT_PROJECT("android_report_project"),
+    ANDROID_PAYMENTSHEET_GOOGLE_PAY("android_paymentsheet_google_pay"),
 }
 
 object StatsigExperiments {

app/src/main/java/com/kickstarter/libs/utils/extensions/ContextExt.kt

@@ -7,6 +7,7 @@ import android.content.Context
 import android.content.pm.PackageManager
 import android.os.Build
 import androidx.annotation.OptIn
+import androidx.annotation.VisibleForTesting
 import androidx.compose.foundation.isSystemInDarkTheme
 import androidx.compose.runtime.Composable
 import androidx.core.content.ContextCompat
@@ -22,6 +23,7 @@ import com.kickstarter.KSApplication
 import com.kickstarter.R
 import com.kickstarter.libs.Environment
 import com.kickstarter.libs.featureflag.FlagKey
+import com.kickstarter.libs.utils.Secrets
 import com.kickstarter.libs.utils.WebUtils
 import com.kickstarter.ui.SharedPreferenceKey
 import com.kickstarter.ui.activities.AppThemes
@@ -195,19 +197,52 @@ fun Context.showAlertDialog(
 /**
  * Provides the configuration for the PaymentSheet, following the specs
  *  @see [link](https://stripe.com/docs/payments/accept-a-payment?platform=android&ui=elements#android-flowcontroller)
+ *
+ * @param googlePayCurrencyCode The three-letter ISO 4217 alphabetic currency code, e.g. "USD" or "EUR".
+ * Required in order to support Google Pay when processing a Setup Intent.
  */
-fun Context.getPaymentSheetConfiguration(userEmail: String): PaymentSheet.Configuration {
+fun Context.getPaymentSheetConfiguration(
+    userEmail: String,
+    googlePayEnabled: Boolean = false,
+    googlePayCurrencyCode: String? = null
+): PaymentSheet.Configuration {
     val stripeLinkEnabled = this.getEnvironment()?.featureFlagClient()?.getBoolean(FlagKey.ANDROID_STRIPE_LINK) ?: false
     // TODO: Wait for stripe to devise a client-side option for turning off link
+    val googlePayConfiguration = this.getGooglePayConfiguration(googlePayEnabled, googlePayCurrencyCode)
 
     return PaymentSheet.Configuration(
         merchantDisplayName = getString(R.string.app_name),
         allowsDelayedPaymentMethods = true,
         appearance = this.getPaymentSheetAppearance(),
-        defaultBillingDetails = PaymentSheet.BillingDetails(email = userEmail)
+        defaultBillingDetails = PaymentSheet.BillingDetails(email = userEmail),
+        googlePay = googlePayConfiguration,
     )
 }
 
+@VisibleForTesting
+fun Context.getGooglePayConfiguration(
+    enabled: Boolean,
+    currencyCode: String?
+): PaymentSheet.GooglePayConfiguration? {
+    val currencyCode = currencyCode?.trim()?.takeIf { it.isNotEmpty() }
+
+    val googlePayEnvironment =
+        if (this.getEnvironment()?.webEndpoint() == Secrets.WebEndpoint.PRODUCTION) {
+            PaymentSheet.GooglePayConfiguration.Environment.Production
+        } else {
+            PaymentSheet.GooglePayConfiguration.Environment.Test
+        }
+
+    // `currencyCode` is required to use Google Pay with Setup Intents
+    return if (enabled && currencyCode != null) {
+        PaymentSheet.GooglePayConfiguration(
+            environment = googlePayEnvironment,
+            countryCode = "US",
+            currencyCode = currencyCode
+        )
+    } else null
+}
+
 /**
  * Provides the color configuration for the PaymentSheet, following the specs
  *  @see [link](https://stripe.com/docs/elements/appearance-api?platform=android#colors-android)

app/src/main/java/com/kickstarter/ui/activities/PaymentMethodsSettingsActivity.kt

@@ -25,6 +25,7 @@ import com.stripe.android.paymentsheet.model.PaymentOption
 import io.reactivex.android.schedulers.AndroidSchedulers
 import io.reactivex.disposables.CompositeDisposable
 import io.reactivex.schedulers.Schedulers
+import timber.log.Timber
 
 class PaymentMethodsSettingsActivity : AppCompatActivity() {
 
@@ -149,9 +150,11 @@ class PaymentMethodsSettingsActivity : AppCompatActivity() {
     }
 
     private fun flowControllerPresentPaymentOption(clientSecret: String, userEmail: String) {
+        val googlePayEnabled = viewModel.outputs.isPaymentSheetGooglePayEnabled()
+        Timber.d("googlePayEnabled: $googlePayEnabled")
         flowController.configureWithSetupIntent(
             setupIntentClientSecret = clientSecret,
-            configuration = this.getPaymentSheetConfiguration(userEmail),
+            configuration = this.getPaymentSheetConfiguration(userEmail, googlePayEnabled, "USD"),
             callback = ::onConfigured
         )
     }

app/src/main/java/com/kickstarter/ui/activities/ProjectPageActivity.kt

@@ -123,6 +123,7 @@ import io.reactivex.android.schedulers.AndroidSchedulers
 import io.reactivex.disposables.CompositeDisposable
 import io.reactivex.schedulers.Schedulers
 import kotlinx.coroutines.launch
+import timber.log.Timber
 
 const val REFRESH = "refresh"
 
@@ -718,7 +719,8 @@ class ProjectPageActivity :
                         latePledgeCheckoutViewModel.clientSecretForNewPaymentMethod.collect {
                             flowControllerPresentPaymentOption(
                                 it,
-                                latePledgeCheckoutUIState.userEmail
+                                latePledgeCheckoutUIState.userEmail,
+                                latePledgeCheckoutUIState.projectCurrency
                             )
                         }
                     }
@@ -1439,10 +1441,12 @@ class ProjectPageActivity :
         }
     }
 
-    private fun flowControllerPresentPaymentOption(clientSecret: String, userEmail: String) {
+    private fun flowControllerPresentPaymentOption(clientSecret: String, userEmail: String, googlePayCurrencyCode: String? = null) {
+        val googlePayEnabled = latePledgeCheckoutViewModel.isPaymentSheetGooglePayEnabled()
+        Timber.d("googlePayEnabled: $googlePayEnabled, googlePayCurrencyCode: $googlePayCurrencyCode")
         flowController.configureWithSetupIntent(
             setupIntentClientSecret = clientSecret,
-            configuration = getPaymentSheetConfiguration(userEmail),
+            configuration = getPaymentSheetConfiguration(userEmail, googlePayEnabled, googlePayCurrencyCode),
             callback = ::onConfigured
         )
     }

app/src/main/java/com/kickstarter/ui/fragments/CrowdfundCheckoutFragment.kt

@@ -117,10 +117,12 @@ class CrowdfundCheckoutFragment : Fragment() {
                         viewModel.presentPaymentSheetStates.collectAsStateWithLifecycle().value
                     val setUpIntent = paymentSheetPresenter.setupClientId
 
+                    val projectCurrencyCode = pledgeData?.projectData()?.project()?.currency()
+
                     configurePaymentSheet(paymentSheetPresenter.setupClientId)
                     LaunchedEffect(key1 = setUpIntent) {
                         if (setUpIntent.isNotEmpty() && email.isNotEmpty()) {
-                            flowControllerPresentPaymentOption(setUpIntent, email)
+                            flowControllerPresentPaymentOption(setUpIntent, email, projectCurrencyCode)
                         }
                     }
 
@@ -205,11 +207,13 @@ class CrowdfundCheckoutFragment : Fragment() {
         return view
     }
 
-    private fun flowControllerPresentPaymentOption(clientSecret: String, userEmail: String) {
+    private fun flowControllerPresentPaymentOption(clientSecret: String, userEmail: String, googlePayCurrencyCode: String? = null) {
         context?.let {
+            val googlePayEnabled = viewModel.isPaymentSheetGooglePayEnabled()
+            Timber.d("googlePayEnabled: $googlePayEnabled, googlePayCurrencyCode: $googlePayCurrencyCode")
             flowController.configureWithSetupIntent(
                 setupIntentClientSecret = clientSecret,
-                configuration = it.getPaymentSheetConfiguration(userEmail),
+                configuration = it.getPaymentSheetConfiguration(userEmail, googlePayEnabled, googlePayCurrencyCode),
                 callback = ::onConfigured
             )
         }

app/src/main/java/com/kickstarter/utils/GooglePayAvailabilityUtil.kt

@@ -0,0 +1,30 @@
+package com.kickstarter.utils
+
+import android.annotation.SuppressLint
+import com.google.android.gms.wallet.IsReadyToPayRequest
+import com.google.android.gms.wallet.PaymentsClient
+import com.stripe.android.googlepaylauncher.GooglePayAvailabilityClient
+import com.stripe.android.googlepaylauncher.GooglePayRepository
+import kotlinx.coroutines.tasks.await
+import org.json.JSONObject
+
+object GooglePayAvailabilityUtil {
+    /* This is a workaround that allows Google Pay to work in `Test` mode, pulled directly from
+     * the associated Issue in the Stripe SDK: https://github.com/stripe/stripe-android/issues/13968 */
+    fun overrideGooglePayAvailabilityClient() {
+        @SuppressLint("RestrictedApi")
+        GooglePayRepository.googlePayAvailabilityClientFactory =
+            object : GooglePayAvailabilityClient.Factory {
+                override fun create(paymentsClient: PaymentsClient) =
+                    object : GooglePayAvailabilityClient {
+                        override suspend fun isReady(request: IsReadyToPayRequest): Boolean {
+                            val relaxed = JSONObject(request.toJson())
+                                .apply { remove("existingPaymentMethodRequired") }
+                            return paymentsClient
+                                .isReadyToPay(IsReadyToPayRequest.fromJson(relaxed.toString()))
+                                .await()
+                        }
+                    }
+            }
+    }
+}

app/src/main/java/com/kickstarter/viewmodels/PaymentMethodsViewModel.kt

@@ -5,6 +5,7 @@ import androidx.lifecycle.ViewModel
 import androidx.lifecycle.ViewModelProvider
 import com.kickstarter.DeletePaymentSourceMutation
 import com.kickstarter.libs.Environment
+import com.kickstarter.libs.featureflag.StatsigGateKey
 import com.kickstarter.libs.rx.transformers.Transformers.combineLatestPair
 import com.kickstarter.libs.rx.transformers.Transformers.errorsV2
 import com.kickstarter.libs.rx.transformers.Transformers.neverErrorV2
@@ -67,6 +68,8 @@ interface Outputs {
 
     /** Emits in case SavePaymentMethod returns success output  */
     fun successSaving(): Observable<String>
+
+    fun isPaymentSheetGooglePayEnabled(): Boolean
 }
 
 class PaymentMethodsViewModel(environment: Environment) : ViewModel(), PaymentMethodsAdapter.Delegate, Inputs, Outputs {
@@ -89,6 +92,8 @@ class PaymentMethodsViewModel(environment: Environment) : ViewModel(), PaymentMe
     private val loadingConfirmed = PublishSubject.create<Boolean>()
 
     private val apolloClient = requireNotNull(environment.apolloClientV2())
+
+    private val statsigClient = requireNotNull(environment.statsigClient())
     private val compositeDisposable = CompositeDisposable()
 
     val inputs: Inputs = this
@@ -298,6 +303,9 @@ class PaymentMethodsViewModel(environment: Environment) : ViewModel(), PaymentMe
     override fun successSaving(): Observable<String> =
         this.successSaving
 
+    override fun isPaymentSheetGooglePayEnabled(): Boolean =
+        statsigClient.configReady.value && statsigClient.checkGate(StatsigGateKey.ANDROID_PAYMENTSHEET_GOOGLE_PAY.key)
+
     class Factory(private val environment: Environment) : ViewModelProvider.Factory {
         override fun <T : ViewModel> create(modelClass: Class<T>): T {
             return PaymentMethodsViewModel(environment) as T

app/src/main/java/com/kickstarter/viewmodels/projectpage/CrowdfundCheckoutViewModel.kt

@@ -8,6 +8,7 @@ import androidx.lifecycle.ViewModelProvider
 import androidx.lifecycle.viewModelScope
 import com.kickstarter.libs.Environment
 import com.kickstarter.libs.RefTag
+import com.kickstarter.libs.featureflag.StatsigGateKey
 import com.kickstarter.libs.utils.RefTagUtils
 import com.kickstarter.libs.utils.RewardUtils
 import com.kickstarter.libs.utils.ThirdPartyEventValues
@@ -78,6 +79,7 @@ class CrowdfundCheckoutViewModel(val environment: Environment, bundle: Bundle? =
     val cookieManager = requireNotNull(environment.cookieManager())
     val sharedPreferences = requireNotNull(environment.sharedPreferences())
     val ffClient = requireNotNull(environment.featureFlagClient())
+    val statsigClient = requireNotNull(environment.statsigClient())
 
     private var pledgeData: PledgeData? = null
     private var checkoutData: CheckoutData? = null // TOD potentially needs to change with user card input
@@ -581,6 +583,9 @@ class CrowdfundCheckoutViewModel(val environment: Environment, bundle: Bundle? =
         }
     }
 
+    fun isPaymentSheetGooglePayEnabled(): Boolean =
+        statsigClient.configReady.value && statsigClient.checkGate(StatsigGateKey.ANDROID_PAYMENTSHEET_GOOGLE_PAY.key)
+
     /**
      * PaymentSheet has been presented to the user, stop loading until
      * a new payment method is received. Will cover as well the case of

app/src/main/java/com/kickstarter/viewmodels/projectpage/LatePledgeCheckoutViewModel.kt

@@ -5,6 +5,7 @@ import androidx.lifecycle.ViewModel
 import androidx.lifecycle.ViewModelProvider
 import androidx.lifecycle.viewModelScope
 import com.kickstarter.libs.Environment
+import com.kickstarter.libs.featureflag.StatsigGateKey
 import com.kickstarter.libs.utils.RewardUtils
 import com.kickstarter.libs.utils.extensions.checkoutTotalAmount
 import com.kickstarter.libs.utils.extensions.isNotNull
@@ -60,7 +61,8 @@ data class LatePledgeCheckoutUIState(
     val selectedRewards: List<Reward> = emptyList(),
     val shippingAmount: Double = 0.0,
     val checkoutTotal: Double = 0.0,
-    val isPledgeButtonEnabled: Boolean = true
+    val isPledgeButtonEnabled: Boolean = true,
+    val projectCurrency: String? = null
 )
 
 class LatePledgeCheckoutViewModel(val environment: Environment) : ViewModel() {
@@ -79,6 +81,8 @@ class LatePledgeCheckoutViewModel(val environment: Environment) : ViewModel() {
 
     private var stripe: Stripe = requireNotNull(environment.stripe())
 
+    private val statsigClient = requireNotNull(environment.statsigClient())
+
     private var clientSecretForNewCard: String = ""
     private var newStoredCard: StoredCard? = null
     private var errorAction: (message: String?) -> Unit = {}
@@ -434,6 +438,7 @@ class LatePledgeCheckoutViewModel(val environment: Environment) : ViewModel() {
                 shippingAmount = this.pledgeData?.shippingCostIfShipping() ?: 0.0,
                 checkoutTotal = this.pledgeData?.checkoutTotalAmount() ?: 0.0,
                 isPledgeButtonEnabled = buttonEnabled && !isLoading,
+                projectCurrency = this.pledgeData?.projectData()?.project()?.currency()
             )
         )
     }
@@ -549,6 +554,9 @@ class LatePledgeCheckoutViewModel(val environment: Environment) : ViewModel() {
         }
     }
 
+    fun isPaymentSheetGooglePayEnabled(): Boolean =
+        statsigClient.configReady.value && statsigClient.checkGate(StatsigGateKey.ANDROID_PAYMENTSHEET_GOOGLE_PAY.key)
+
     class Factory(private val environment: Environment) :
         ViewModelProvider.Factory {
         override fun <T : ViewModel> create(modelClass: Class<T>): T {

app/src/main/java/com/kickstarter/viewmodels/projectpage/RewardsSelectionViewModel.kt

@@ -110,7 +110,7 @@ class RewardsSelectionViewModel(private val environment: Environment, private va
             emitCurrentState()
         }
 
-        if (!refreshData) return
+//        if (!refreshData) return
 
         viewModelScope.launch(CoroutineExceptionHandler { _, throwable -> Timber.e(throwable, "CoroutineExceptionHandler") }) {
             mutableShippingUIState.update { previous ->

app/src/test/java/com/kickstarter/libs/utils/extensions/ContextExtTest.kt

@@ -0,0 +1,15 @@
+package com.kickstarter.libs.utils.extensions
+
+import com.kickstarter.KSRobolectricTestCase
+import org.junit.Test
+
+class ContextExtTest : KSRobolectricTestCase() {
+    @Test
+    fun `test getGooglePayConfiguration()`() {
+        val context = application()
+        assertNull(context.getGooglePayConfiguration(false, "USD"))
+        assertNull(context.getGooglePayConfiguration(true, null))
+        assertNull(context.getGooglePayConfiguration(true, " "))
+        assertNotNull(context.getGooglePayConfiguration(true, "EUR"))
+    }
+}