Add klarna to sdk w/ example

example/AndroidManifest.xml

@@ -67,6 +67,7 @@
         <activity android:name=".activity.SimpleConfirmationActivity" />
         <activity android:name=".activity.ConnectExampleActivity" />
         <activity android:name=".activity.ComposeExampleActivity" />
+        <activity android:name=".activity.KlarnaPaymentActivity"/>
     </application>
 
 </manifest>

example/res/layout/klarna_payment_activity.xml

@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:paddingStart="10dp"
+        android:paddingEnd="10dp"
+        android:paddingBottom="20dp">
+
+        <com.google.android.material.progressindicator.LinearProgressIndicator
+            android:id="@+id/progress_bar"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:indeterminate="true"
+            android:visibility="invisible"
+            style="@style/Widget.MaterialComponents.LinearProgressIndicator" />
+
+        <TextView
+            android:layout_marginTop="10dp"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/klarna_example_intro" />
+
+        <Button
+            android:id="@+id/confirm_with_klarna_button"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="4dp"
+            android:text="@string/confirm_klarna_button" />
+
+        <TextView
+            android:id="@+id/status"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:typeface="monospace"
+            android:layout_marginTop="40dp"/>
+    </LinearLayout>
+</ScrollView>

example/res/values/strings.xml

@@ -76,6 +76,10 @@
     <string name="create_klarna_source">Create and Authenticate Klarna Source</string>
     <string name="fetch_klarna_source">Fetch Klarna Source</string>
 
+    <string name="klarna_example_intro">Tapping the button below will create a PaymentIntent and then use Klarna to confirm it</string>
+    <string name="confirm_klarna_button">Confirm with Klarna</string>
+    <string name="confirm_with_klarna">Klarna Payment Intent Example</string>
+
     <!-- SEPA Debit -->
     <string name="sepa_debit_mandate">By providing your IBAN and confirming this payment, you are authorizing EXAMPLE COMPANY NAME and Stripe, our payment service provider, to send instructions to your bank to debit your account and your bank to debit your account in accordance with those instructions. You are entitled to a refund from your bank under the terms and conditions of your agreement with your bank. A refund must be claimed within 8 weeks starting from the date on which your account was debited.</string>
     <string name="iban_hint">IBAN</string>

example/src/main/java/com/stripe/example/activity/KlarnaPaymentActivity.kt

@@ -0,0 +1,44 @@
+package com.stripe.example.activity
+
+import android.os.Bundle
+import android.view.View
+import androidx.lifecycle.Observer
+import com.stripe.android.model.Address
+import com.stripe.android.model.PaymentMethod
+import com.stripe.android.model.PaymentMethodCreateParams
+import com.stripe.example.databinding.KlarnaPaymentActivityBinding
+
+class KlarnaPaymentActivity : StripeIntentActivity() {
+
+    private val viewBinding: KlarnaPaymentActivityBinding by lazy {
+        KlarnaPaymentActivityBinding.inflate(layoutInflater)
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(viewBinding.root)
+
+        viewModel.inProgress.observe(this, { enableUi(!it) })
+        viewModel.status.observe(this, Observer(viewBinding.status::setText))
+
+        viewBinding.confirmWithKlarnaButton.setOnClickListener {
+            createAndConfirmPaymentIntent("US", confirmParams, "klarna")
+        }
+    }
+
+    private fun enableUi(enable: Boolean) {
+        viewBinding.progressBar.visibility = if (enable) View.INVISIBLE else View.VISIBLE
+        viewBinding.confirmWithKlarnaButton.isEnabled = enable
+    }
+
+    private companion object {
+        private val confirmParams = PaymentMethodCreateParams.createKlarna(
+            billingDetails = PaymentMethod.BillingDetails(
+                email = "[email protected]",
+                address = Address.Builder()
+                    .setCountry("US")
+                    .build()
+            )
+        )
+    }
+}

example/src/main/java/com/stripe/example/activity/LauncherActivity.kt

@@ -93,6 +93,10 @@ class LauncherActivity : AppCompatActivity() {
                 activity.getString(R.string.klarna_source_example),
                 KlarnaSourceActivity::class.java
             ),
+            Item(
+                activity.getString(R.string.confirm_with_klarna),
+                KlarnaPaymentActivity::class.java
+            ),
             Item(
                 activity.getString(R.string.becs_debit_example),
                 BecsDebitPaymentMethodActivity::class.java

example/src/main/java/com/stripe/example/activity/StripeIntentActivity.kt

@@ -74,6 +74,7 @@ abstract class StripeIntentActivity : AppCompatActivity() {
     protected fun createAndConfirmPaymentIntent(
         country: String,
         paymentMethodCreateParams: PaymentMethodCreateParams?,
+        supportedPaymentMethods: String? = null,
         shippingDetails: ConfirmPaymentIntentParams.Shipping? = null,
         stripeAccountId: String? = null,
         existingPaymentMethodId: String? = null,
@@ -84,7 +85,10 @@ abstract class StripeIntentActivity : AppCompatActivity() {
 
         keyboardController.hide()
 
-        viewModel.createPaymentIntent(country).observe(
+        viewModel.createPaymentIntent(
+            country = country,
+            supportedPaymentMethods = supportedPaymentMethods
+        ).observe(
             this,
             { result ->
                 result.onSuccess {

example/src/main/java/com/stripe/example/module/StripeIntentViewModel.kt

@@ -22,7 +22,8 @@ internal class StripeIntentViewModel(
 
     fun createPaymentIntent(
         country: String,
-        customerId: String? = null
+        customerId: String? = null,
+        supportedPaymentMethods: String? = null
     ) = makeBackendRequest(
         R.string.creating_payment_intent,
         R.string.payment_intent_status
@@ -33,6 +34,10 @@ internal class StripeIntentViewModel(
                     customerId?.let {
                         mapOf("customer_id" to it)
                     }.orEmpty()
+                ).plus(
+                    supportedPaymentMethods?.let {
+                        mapOf("supported_payment_methods" to it)
+                    }.orEmpty()
                 )
                 .toMutableMap()
         )

payments-core/api/payments-core.api

@@ -3085,6 +3085,7 @@ public final class com/stripe/android/model/PaymentMethod$Type : java/lang/Enum,
 	public static final field Giropay Lcom/stripe/android/model/PaymentMethod$Type;
 	public static final field GrabPay Lcom/stripe/android/model/PaymentMethod$Type;
 	public static final field Ideal Lcom/stripe/android/model/PaymentMethod$Type;
+	public static final field Klarna Lcom/stripe/android/model/PaymentMethod$Type;
 	public static final field Netbanking Lcom/stripe/android/model/PaymentMethod$Type;
 	public static final field Oxxo Lcom/stripe/android/model/PaymentMethod$Type;
 	public static final field P24 Lcom/stripe/android/model/PaymentMethod$Type;
@@ -3189,6 +3190,9 @@ public final class com/stripe/android/model/PaymentMethodCreateParams : android/
 	public static final fun createGiropay (Lcom/stripe/android/model/PaymentMethod$BillingDetails;Ljava/util/Map;)Lcom/stripe/android/model/PaymentMethodCreateParams;
 	public static final fun createGrabPay (Lcom/stripe/android/model/PaymentMethod$BillingDetails;)Lcom/stripe/android/model/PaymentMethodCreateParams;
 	public static final fun createGrabPay (Lcom/stripe/android/model/PaymentMethod$BillingDetails;Ljava/util/Map;)Lcom/stripe/android/model/PaymentMethodCreateParams;
+	public static final fun createKlarna ()Lcom/stripe/android/model/PaymentMethodCreateParams;
+	public static final fun createKlarna (Lcom/stripe/android/model/PaymentMethod$BillingDetails;)Lcom/stripe/android/model/PaymentMethodCreateParams;
+	public static final fun createKlarna (Lcom/stripe/android/model/PaymentMethod$BillingDetails;Ljava/util/Map;)Lcom/stripe/android/model/PaymentMethodCreateParams;
 	public static final fun createOxxo (Lcom/stripe/android/model/PaymentMethod$BillingDetails;)Lcom/stripe/android/model/PaymentMethodCreateParams;
 	public static final fun createOxxo (Lcom/stripe/android/model/PaymentMethod$BillingDetails;Ljava/util/Map;)Lcom/stripe/android/model/PaymentMethodCreateParams;
 	public static final fun createP24 (Lcom/stripe/android/model/PaymentMethod$BillingDetails;)Lcom/stripe/android/model/PaymentMethodCreateParams;
@@ -3343,6 +3347,10 @@ public final class com/stripe/android/model/PaymentMethodCreateParams$Companion
 	public final fun createGrabPay (Lcom/stripe/android/model/PaymentMethod$BillingDetails;)Lcom/stripe/android/model/PaymentMethodCreateParams;
 	public final fun createGrabPay (Lcom/stripe/android/model/PaymentMethod$BillingDetails;Ljava/util/Map;)Lcom/stripe/android/model/PaymentMethodCreateParams;
 	public static synthetic fun createGrabPay$default (Lcom/stripe/android/model/PaymentMethodCreateParams$Companion;Lcom/stripe/android/model/PaymentMethod$BillingDetails;Ljava/util/Map;ILjava/lang/Object;)Lcom/stripe/android/model/PaymentMethodCreateParams;
+	public final fun createKlarna ()Lcom/stripe/android/model/PaymentMethodCreateParams;
+	public final fun createKlarna (Lcom/stripe/android/model/PaymentMethod$BillingDetails;)Lcom/stripe/android/model/PaymentMethodCreateParams;
+	public final fun createKlarna (Lcom/stripe/android/model/PaymentMethod$BillingDetails;Ljava/util/Map;)Lcom/stripe/android/model/PaymentMethodCreateParams;
+	public static synthetic fun createKlarna$default (Lcom/stripe/android/model/PaymentMethodCreateParams$Companion;Lcom/stripe/android/model/PaymentMethod$BillingDetails;Ljava/util/Map;ILjava/lang/Object;)Lcom/stripe/android/model/PaymentMethodCreateParams;
 	public final fun createOxxo (Lcom/stripe/android/model/PaymentMethod$BillingDetails;)Lcom/stripe/android/model/PaymentMethodCreateParams;
 	public final fun createOxxo (Lcom/stripe/android/model/PaymentMethod$BillingDetails;Ljava/util/Map;)Lcom/stripe/android/model/PaymentMethodCreateParams;
 	public static synthetic fun createOxxo$default (Lcom/stripe/android/model/PaymentMethodCreateParams$Companion;Lcom/stripe/android/model/PaymentMethod$BillingDetails;Ljava/util/Map;ILjava/lang/Object;)Lcom/stripe/android/model/PaymentMethodCreateParams;

payments-core/src/main/java/com/stripe/android/model/PaymentMethod.kt

@@ -295,6 +295,13 @@ constructor(
             isVoucher = false,
             requiresMandate = false,
             hasDelayedSettlement = false
+        ),
+        Klarna(
+            "klarna",
+            isReusable = false,
+            isVoucher = false,
+            requiresMandate = false,
+            hasDelayedSettlement = false
         );
 
         @RestrictTo(RestrictTo.Scope.LIBRARY_GROUP) // For paymentsheet

payments-core/src/main/java/com/stripe/android/model/PaymentMethodCreateParams.kt

@@ -735,6 +735,19 @@ data class PaymentMethodCreateParams internal constructor(
             )
         }
 
+        @JvmStatic
+        @JvmOverloads
+        fun createKlarna(
+            billingDetails: PaymentMethod.BillingDetails? = null,
+            metadata: Map<String, String>? = null
+        ): PaymentMethodCreateParams {
+            return PaymentMethodCreateParams(
+                type = PaymentMethod.Type.Klarna,
+                billingDetails = billingDetails,
+                metadata = metadata
+            )
+        }
+
         @RestrictTo(RestrictTo.Scope.LIBRARY_GROUP) // For paymentsheet
         fun createWithOverride(
             type: PaymentMethod.Type,

payments-core/src/test/java/com/stripe/android/PaymentMethodEndToEndTest.kt

@@ -4,6 +4,7 @@ import android.content.Context
 import androidx.test.core.app.ApplicationProvider
 import com.google.common.truth.Truth.assertThat
 import com.stripe.android.exception.InvalidRequestException
+import com.stripe.android.model.Address
 import com.stripe.android.model.PaymentMethod
 import com.stripe.android.model.PaymentMethodCreateParams
 import com.stripe.android.model.PaymentMethodCreateParamsFixtures
@@ -338,4 +339,47 @@ internal class PaymentMethodEndToEndTest {
         assertThat(paymentMethod?.type)
             .isEqualTo(PaymentMethod.Type.WeChatPay)
     }
+
+    @Test
+    fun createPaymentMethod_withKlarna_shouldCreateObject() {
+        val missingAddressException = assertFailsWith<InvalidRequestException>(
+            "Address is required to create a klarna payment method"
+        ) {
+            val params = PaymentMethodCreateParams.createKlarna(
+                billingDetails =
+                PaymentMethodCreateParamsFixtures.BILLING_DETAILS.copy(address = null)
+            )
+            Stripe(context, ApiKeyFixtures.KLARNA_PUBLISHABLE_KEY)
+                .createPaymentMethodSynchronous(params)
+        }
+
+        assertThat(missingAddressException.message)
+            .isEqualTo("You must provide `billing_details[address][country]` to use Klarna.")
+
+        val missingCountryException = assertFailsWith<InvalidRequestException>(
+            "Country is required to create a klarna payment method"
+        ) {
+            val address = Address(country = null)
+            val params = PaymentMethodCreateParams.createKlarna(
+                billingDetails =
+                PaymentMethodCreateParamsFixtures.BILLING_DETAILS.copy(address = address)
+            )
+
+            Stripe(context, ApiKeyFixtures.KLARNA_PUBLISHABLE_KEY)
+                .createPaymentMethodSynchronous(params)
+        }
+
+        assertThat(missingCountryException.message)
+            .isEqualTo("You must provide `billing_details[address][country]` to use Klarna.")
+
+        val params = PaymentMethodCreateParams.createKlarna(
+            billingDetails = PaymentMethodCreateParamsFixtures.BILLING_DETAILS.copy()
+        )
+
+        val paymentMethod =
+            Stripe(context, ApiKeyFixtures.KLARNA_PUBLISHABLE_KEY)
+                .createPaymentMethodSynchronous(params)
+
+        assertThat(paymentMethod?.type).isEqualTo(PaymentMethod.Type.Klarna)
+    }
 }

payments-core/src/test/java/com/stripe/android/model/PaymentIntentFixtures.kt

@@ -1179,4 +1179,65 @@ internal object PaymentIntentFixtures {
 
     val PI_REFRESH_RESPONSE_WECHAT_PAY_SUCCESS =
         PARSER.parse(PI_REFRESH_RESPONSE_WECHAT_PAY_SUCCESS_JSON)!!
+
+    val PI_WITH_KLARNA_IN_PAYMENT_METHODS_JSON = JSONObject(
+        """
+        {
+          "id": "pi_3JoznDLu5o3P18Zp0lRzng7p",
+          "object": "payment_intent",
+          "amount": 1099,
+          "amount_capturable": 0,
+          "amount_received": 0,
+          "application": null,
+          "application_fee_amount": null,
+          "canceled_at": null,
+          "cancellation_reason": null,
+          "capture_method": "automatic",
+          "charges": {
+            "object": "list",
+            "data": [
+
+            ],
+            "has_more": false,
+            "total_count": 0,
+            "url": "/v1/charges?payment_intent=pi_3JoznDLu5o3P18Zp0lRzng7p"
+          },
+          "client_secret": "pi_3JoznDLu5o3P18Zp0lRzng7p_secret_2wQkxNRVYQOzBcG6XGbw2tyBv",
+          "confirmation_method": "automatic",
+          "created": 1635293699,
+          "currency": "eur",
+          "customer": null,
+          "description": null,
+          "invoice": null,
+          "last_payment_error": null,
+          "livemode": false,
+          "metadata": {
+          },
+          "next_action": null,
+          "on_behalf_of": null,
+          "payment_method": null,
+          "payment_method_options": {
+            "klarna": {
+              "preferred_locale": null
+            }
+          },
+          "payment_method_types": [
+            "klarna"
+          ],
+          "receipt_email": null,
+          "review": null,
+          "setup_future_usage": null,
+          "shipping": null,
+          "source": null,
+          "statement_descriptor": null,
+          "statement_descriptor_suffix": null,
+          "status": "requires_payment_method",
+          "transfer_data": null,
+          "transfer_group": null
+        }
+        """.trimIndent()
+    )
+
+    val PI_WITH_KLARNA_IN_PAYMENT_METHODS =
+        PARSER.parse(PI_WITH_KLARNA_IN_PAYMENT_METHODS_JSON)!!
 }

payments-core/src/test/java/com/stripe/android/model/PaymentIntentTest.kt

@@ -57,6 +57,13 @@ class PaymentIntentTest {
             .containsExactly("wechat_pay")
     }
 
+    @Test
+    fun parsePaymentIntentWithKlarnaPaymentMethods() {
+        val paymentIntent = PaymentIntentFixtures.PI_WITH_KLARNA_IN_PAYMENT_METHODS
+        assertThat(paymentIntent.paymentMethodTypes)
+            .containsExactly("klarna")
+    }
+
     @Test
     fun getNextActionData_whenUseStripeSdkWith3ds2() {
         val paymentIntent = PaymentIntentFixtures.PI_REQUIRES_MASTERCARD_3DS2