Add payment repository with query payment types function

android/app/build.gradle.kts

@@ -261,6 +261,9 @@ dependencies {
     implementation(Dependencies.Kotlin.stdlib)
     implementation(Dependencies.KotlinX.coroutinesAndroid)
 
+    // Billing
+    implementation(project(Dependencies.Mullvad.billingLib))
+
     // UI tooling
     implementation(Dependencies.Compose.uiToolingPreview)
     debugImplementation(Dependencies.Compose.uiTooling)

android/app/src/main/kotlin/net/mullvad/mullvadvpn/repository/payment/BillingPaymentAvailability.kt

@@ -0,0 +1,18 @@
+package net.mullvad.mullvadvpn.repository.payment
+
+import net.mullvad.mullvadvpn.lib.billing.model.BillingException
+import net.mullvad.mullvadvpn.lib.billing.model.BillingProduct
+
+sealed interface BillingPaymentAvailability {
+    data class ProductsAvailable(val products: List<BillingProduct>) : BillingPaymentAvailability
+
+    data object ProductsUnavailable : BillingPaymentAvailability
+
+    sealed interface Error : BillingPaymentAvailability {
+        data object BillingUnavailable : BillingPaymentAvailability
+
+        data object ServiceUnavailable : BillingPaymentAvailability
+
+        data class Other(val exception: BillingException) : BillingPaymentAvailability
+    }
+}

android/app/src/main/kotlin/net/mullvad/mullvadvpn/repository/payment/PaymentAvailability.kt

@@ -0,0 +1,6 @@
+package net.mullvad.mullvadvpn.repository.payment
+
+data class PaymentAvailability(
+    val webPaymentAvailable: Boolean,
+    val billingPaymentAvailability: BillingPaymentAvailability
+)

android/app/src/main/kotlin/net/mullvad/mullvadvpn/repository/payment/PaymentRepository.kt

@@ -0,0 +1,33 @@
+package net.mullvad.mullvadvpn.repository.payment
+
+import net.mullvad.mullvadvpn.lib.billing.BillingRepository
+import net.mullvad.mullvadvpn.lib.billing.model.QueryProductResult
+
+class PaymentRepository(
+    private val billingRepository: BillingRepository,
+    private val showWebPayment: Boolean
+) {
+    suspend fun queryAvailablePaymentTypes(): PaymentAvailability =
+        PaymentAvailability(
+            webPaymentAvailable = showWebPayment,
+            billingPaymentAvailability = getBillingProducts()
+        )
+
+    private suspend fun getBillingProducts(): BillingPaymentAvailability =
+        when (val result = billingRepository.queryProducts()) {
+            is QueryProductResult.Ok ->
+                BillingPaymentAvailability.ProductsAvailable(products = result.products)
+            QueryProductResult.ItemUnavailable -> BillingPaymentAvailability.ProductsUnavailable
+            QueryProductResult.BillingUnavailable ->
+                BillingPaymentAvailability.Error.BillingUnavailable
+            QueryProductResult.ServiceUnavailable ->
+                BillingPaymentAvailability.Error.ServiceUnavailable
+            is QueryProductResult.Error ->
+                BillingPaymentAvailability.Error.Other(exception = result.exception)
+        }
+
+    private fun fetchTransactionId(): String {
+        // Placeholder function
+        return "BOOPITOBOP"
+    }
+}