Adding GrabPay PaymentMethod support

example/res/drawable/ic_brandicon_grabpay.xml

@@ -0,0 +1,15 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="38.45dp"
+    android:height="24dp"
+    android:viewportWidth="38.45"
+    android:viewportHeight="24">
+  <path
+      android:pathData="M36.62,24H1.83C0.82,24 0,23.18 0,22.17V1.83C0,0.82 0.82,0 1.83,0h34.79c1.01,0 1.83,0.82 1.83,1.83v20.34C38.45,23.18 37.63,24 36.62,24z"
+      android:fillColor="#00B14F"/>
+  <path
+      android:pathData="M12.81,11.78v0.37c0,1.98 0.75,3.83 2.12,5.2c1.36,1.37 3.19,2.13 5.14,2.13c1.57,0 2.96,-0.35 4.13,-1.05c0.97,-0.58 1.4,-1.16 1.43,-1.21v-6.15h-5.84v1.14h4.7v4.65l0,0c-0.55,0.55 -1.86,1.47 -4.42,1.47c-1.67,0 -3.22,-0.64 -4.36,-1.8c-1.14,-1.15 -1.76,-2.71 -1.76,-4.39v-0.37c0,-1.59 0.71,-3.17 1.96,-4.34c1.27,-1.19 2.93,-1.85 4.67,-1.85c1.62,0 2.75,0.25 3.66,0.79V5.11c-0.94,-0.4 -2.07,-0.58 -3.66,-0.58C16.37,4.52 12.81,7.85 12.81,11.78"
+      android:fillColor="#FFFFFF"/>
+  <path
+      android:pathData="M24.24,8.59V7.24c-1.03,-0.55 -2.16,-0.8 -3.66,-0.8c-1.53,0 -2.97,0.56 -4.07,1.58c-1.1,1.02 -1.71,2.36 -1.71,3.77v0.37c0,2.95 2.36,5.35 5.27,5.35c2.36,0 3.34,-0.77 3.58,-1.02v-3.43h-3.86v1.14h2.79v1.72l-0.01,0c-0.36,0.14 -1.11,0.44 -2.5,0.44c-1.11,0 -2.15,-0.43 -2.92,-1.22c-0.78,-0.79 -1.21,-1.85 -1.21,-2.99v-0.37c0,-2.28 2.13,-4.2 4.64,-4.2C22.33,7.58 23.36,7.86 24.24,8.59"
+      android:fillColor="#FFFFFF"/>
+</vector>

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

@@ -129,6 +129,10 @@ class SimplePaymentMethodConfirmationActivity : StripeIntentActivity() {
             Giropay(
                 "de", R.drawable.ic_brandicon__giropay,
                 PaymentMethodCreateParams.Companion::createGiropay
+            ),
+            GrabPay(
+                "sg", R.drawable.ic_brandicon_grabpay,
+                PaymentMethodCreateParams.Companion::createGrabPay
             );
         }
 

stripe/src/main/java/com/stripe/android/model/PaymentMethod.kt

@@ -133,7 +133,8 @@ data class PaymentMethod internal constructor(
         Giropay("giropay", isReusable = false),
         Eps("eps", isReusable = false),
         Oxxo("oxxo", isReusable = false),
-        Alipay("alipay", isReusable = false);
+        Alipay("alipay", isReusable = false),
+        GrabPay("grabpay", isReusable = false);
 
         override fun toString(): String {
             return code

stripe/src/main/java/com/stripe/android/model/PaymentMethodCreateParams.kt

@@ -167,7 +167,8 @@ data class PaymentMethodCreateParams internal constructor(
         Giropay("giropay"),
         Eps("eps"),
         Oxxo("oxxo"),
-        Alipay("alipay")
+        Alipay("alipay"),
+        GrabPay("grabpay"),
     }
 
     @Parcelize
@@ -534,6 +535,22 @@ data class PaymentMethodCreateParams internal constructor(
             )
         }
 
+        /**
+         * @return params for creating a [PaymentMethod.Type.GrabPay] payment method
+         */
+        @JvmStatic
+        @JvmOverloads
+        fun createGrabPay(
+            billingDetails: PaymentMethod.BillingDetails,
+            metadata: Map<String, String>? = null
+        ): PaymentMethodCreateParams {
+            return PaymentMethodCreateParams(
+                type = Type.GrabPay,
+                billingDetails = billingDetails,
+                metadata = metadata
+            )
+        }
+
         /**
          * @return params for creating a [PaymentMethod.Type.Eps] payment method
          */

stripe/src/test/java/com/stripe/android/ApiKeyFixtures.kt

@@ -18,4 +18,5 @@ internal object ApiKeyFixtures {
     const val OXXO_PUBLISHABLE_KEY = "pk_test_bjqpeDIsfh4Bnwok0rtnrS7200PY7PLRfb"
     const val ALIPAY_PUBLISHABLE_KEY = "pk_test_vOo1umqsYxSrP5UXfOeL3ecm"
     const val CB_PUBLISHABLE_KEY = "pk_test_51Gsr5VLtxFHECmaoeyWTxRKLZZiks5QKbg5H0IeGd8yt7OzQhA7807thLrHayMOeDRmJv3ara1VYy6AvBXAnUGcB00QAZheC0Z"
+    const val GRABPAY_PUBLISHABLE_KEY = "pk_test_TP0eh0buhedbg787icFUy83H00i9fh4Auj"
 }

stripe/src/test/java/com/stripe/android/PaymentMethodEndToEndTest.kt

@@ -214,4 +214,20 @@ class PaymentMethodEndToEndTest {
         assertThat(paymentMethod?.type)
             .isEqualTo(PaymentMethod.Type.Alipay)
     }
+
+    @Test
+    fun createPaymentMethod_withGrabPay_shouldCreateObject() {
+        val repository = StripeApiRepository(
+            context,
+            ApiKeyFixtures.GRABPAY_PUBLISHABLE_KEY
+        )
+
+        val params = PaymentMethodCreateParamsFixtures.GRABPAY
+        val paymentMethod = repository.createPaymentMethod(
+            params,
+            ApiRequest.Options(ApiKeyFixtures.GRABPAY_PUBLISHABLE_KEY)
+        )
+        assertThat(paymentMethod?.type)
+            .isEqualTo(PaymentMethod.Type.GrabPay)
+    }
 }

stripe/src/test/java/com/stripe/android/model/PaymentMethodCreateParamsFixtures.kt

@@ -85,6 +85,10 @@ internal object PaymentMethodCreateParamsFixtures {
         billingDetails = BILLING_DETAILS
     )
 
+    internal val GRABPAY = PaymentMethodCreateParams.createGrabPay(
+        billingDetails = BILLING_DETAILS
+    )
+
     @JvmStatic
     fun createWith(metadata: Map<String, String>): PaymentMethodCreateParams {
         return PaymentMethodCreateParams.create(