Updated on 2026-08-14

core/datasource/src/main/java/com/tangem/datasource/api/common/config/TangemPay.kt

@@ -55,6 +55,7 @@ internal sealed class TangemPay(
         "version" to ProviderSuspend { appInfoProvider.appVersion },
         "platform" to ProviderSuspend { "Android" },
         "X-API-KEY" to ProviderSuspend { getBffStaticToken(apiEnvironment) },
+        "X-Device-Scale" to ProviderSuspend { appInfoProvider.deviceScale.toString() },
     )
 
     private fun getBffStaticToken(apiEnvironment: ApiEnvironment): String {

core/datasource/src/main/java/com/tangem/datasource/api/pay/TangemPayApi.kt

@@ -29,6 +29,11 @@ interface TangemPayApi {
     @GET("v1/customer/me")
     suspend fun getCustomerMe(@Header("Authorization") authHeader: String): ApiResponse<CustomerMeResponse>
 
+    @GET("v1/customer/tariff-plan/transitions")
+    suspend fun getTariffPlanTransitions(
+        @Header("Authorization") authHeader: String,
+    ): ApiResponse<TariffPlanTransitionsResponse>
+
     /** Fiat bank requisites for the Virtual Account on-ramp (VA MVP0, TWI-1638). */
     @GET("v1/account/bank-credentials/{product_instance_id}")
     suspend fun getBankCredentials(

core/datasource/src/main/java/com/tangem/datasource/api/pay/models/response/CustomerMeResponse.kt

@@ -39,6 +39,13 @@ data class CustomerMeResponse(
         @Json(name = "type") val type: String?,
         @Json(name = "name") val name: String?,
         @Json(name = "description_items") val descriptionItems: List<DescriptionItem>?,
+        @Json(name = "images") val images: List<Image>? = null,
+    )
+
+    @JsonClass(generateAdapter = true)
+    data class Image(
+        @Json(name = "type") val type: String?,
+        @Json(name = "url") val url: String?,
     )
 
     @JsonClass(generateAdapter = true)

core/datasource/src/main/java/com/tangem/datasource/api/pay/models/response/TariffPlanTransitionsResponse.kt

@@ -0,0 +1,15 @@
+package com.tangem.datasource.api.pay.models.response
+
+import com.squareup.moshi.Json
+import com.squareup.moshi.JsonClass
+
+@JsonClass(generateAdapter = true)
+data class TariffPlanTransitionsResponse(
+    @Json(name = "result") val result: List<TariffPlanTransitionResponse>?,
+)
+
+@JsonClass(generateAdapter = true)
+data class TariffPlanTransitionResponse(
+    @Json(name = "type") val type: String?,
+    @Json(name = "tariff_plan") val tariffPlan: CustomerMeResponse.TariffPlan?,
+)

core/datasource/src/test/kotlin/com/tangem/datasource/api/common/config/managers/ProdApiConfigsManagerTest.kt

@@ -70,6 +70,7 @@ internal class ProdApiConfigsManagerTest {
         every { appInfoProvider.osVersion } returns "Android 16"
         every { appInfoProvider.language } returns Locale.getDefault().toLanguageTag()
         every { appInfoProvider.device } returns "${Build.MANUFACTURER} ${Build.MODEL}"
+        every { appInfoProvider.deviceScale } returns DEVICE_SCALE
 
         manager = ProdApiConfigsManager(apiConfigs = createApiConfigs())
     }
@@ -298,6 +299,7 @@ internal class ProdApiConfigsManagerTest {
                     "version" to ProviderSuspend { VERSION_NAME },
                     "platform" to ProviderSuspend { "Android" },
                     "X-API-KEY" to ProviderSuspend { TANGEM_PAY_BFF_KEY_DEV },
+                    "X-Device-Scale" to ProviderSuspend { DEVICE_SCALE.toString() },
                 ),
             ),
         )
@@ -313,6 +315,7 @@ internal class ProdApiConfigsManagerTest {
                     "version" to ProviderSuspend { VERSION_NAME },
                     "platform" to ProviderSuspend { "Android" },
                     "X-API-KEY" to ProviderSuspend { TANGEM_PAY_BFF_KEY_DEV },
+                    "X-Device-Scale" to ProviderSuspend { DEVICE_SCALE.toString() },
                 ),
             ),
         )
@@ -457,6 +460,7 @@ internal class ProdApiConfigsManagerTest {
     private companion object {
 
         const val VERSION_NAME = "debug"
+        const val DEVICE_SCALE = 3f
         const val EXPRESS_SESSION_ID = "express_session_id"
         const val STAKE_KIT_API_KEY = "stake_kit_api_key"
         const val P2P_API_KEY = "p2p_api_key"

core/res/src/main/res/values/strings.xml

@@ -1978,6 +1978,13 @@
   <string name="tangempay_pay_support">Pay Support</string>
   <string name="tangempay_payment_account">Payment account</string>
   <string name="tangempay_payment_account_sync_needed">Session expired</string>
+  <string name="tangempay_select_plan_title">Select plan</string>
+  <string name="tangempay_select_plan_confirm_title">Confirm selection</string>
+  <string name="tangempay_select_plan_compare">Compare plans</string>
+  <string name="tangempay_select_plan_btn_select">Select</string>
+  <string name="tangempay_select_plan_btn_cancel">Cancel</string>
+  <string name="tangempay_select_plan_btn_upgrade">Upgrade plan</string>
+  <string name="tangempay_select_plan_btn_downgrade">Downgrade plan</string>
   <string name="tangempay_pin_validation_error_message">Invalid PIN: avoid sequences or repeats</string>
   <string name="tangempay_reissue_card_confirm">Replace card</string>
   <string name="tangempay_reissue_card_description">This generates a new set of card details. Your old details will stop working. You can\'t undo this.</string>

core/utils/src/main/java/com/tangem/utils/info/AppInfoProvider.kt

@@ -27,6 +27,11 @@ interface AppInfoProvider {
     /** Current locale as a BCP 47 language tag (e.g. `"en-US"`, `"zh-CN"`). */
     val language: String
 
+    /**
+     * Display density as a float (e.g. `"2.0"`, `"2.75"`, `"3.0"`).
+     */
+    val deviceScale: Float
+
     /** IANA time-zone id of the device's current time zone, e.g. `"Europe/Moscow"`, `"UTC"`. */
     val timezone: String