Fix promo offer consumption and mobile purchase button

app/services/subscription_purchase_service.py

@@ -814,60 +814,71 @@ class MiniAppSubscriptionPurchaseService:
 
         discount_lines: List[str] = []
 
-        if details.get("base_discount_total"):
-            discount_lines.append(
-                texts.t(
-                    "MINIAPP_PURCHASE_DISCOUNT_PERIOD",
-                    "Period discount: -{amount} ({percent}%)",
-                ).format(
-                    amount=texts.format_price(details["base_discount_total"]),
-                    percent=details.get("base_discount_percent", 0),
-                )
+        def build_discount_line(key: str, default: str, amount: int, percent: int) -> Optional[str]:
+            if not amount:
+                return None
+            return texts.t(key, default).format(
+                amount=texts.format_price(amount),
+                percent=percent,
             )
 
-        if details.get("traffic_discount_total"):
-            discount_lines.append(
-                texts.t(
-                    "MINIAPP_PURCHASE_DISCOUNT_TRAFFIC",
-                    "Traffic discount: -{amount} ({percent}%)",
-                ).format(
-                    amount=texts.format_price(details["traffic_discount_total"]),
-                    percent=details.get("traffic_discount_percent", 0),
-                )
+        def build_discount_note(amount: int, percent: int) -> Optional[str]:
+            if not amount:
+                return None
+            return texts.t(
+                "MINIAPP_PURCHASE_BREAKDOWN_DISCOUNT_NOTE",
+                "Discount: -{amount} ({percent}%)",
+            ).format(
+                amount=texts.format_price(amount),
+                percent=percent,
             )
 
-        if details.get("servers_discount_total"):
-            discount_lines.append(
-                texts.t(
-                    "MINIAPP_PURCHASE_DISCOUNT_SERVERS",
-                    "Servers discount: -{amount} ({percent}%)",
-                ).format(
-                    amount=texts.format_price(details["servers_discount_total"]),
-                    percent=details.get("servers_discount_percent", 0),
-                )
-            )
+        base_discount_line = build_discount_line(
+            "MINIAPP_PURCHASE_DISCOUNT_PERIOD",
+            "Period discount: -{amount} ({percent}%)",
+            details.get("base_discount_total", 0),
+            details.get("base_discount_percent", 0),
+        )
+        if base_discount_line:
+            discount_lines.append(base_discount_line)
 
-        if details.get("devices_discount_total"):
-            discount_lines.append(
-                texts.t(
-                    "MINIAPP_PURCHASE_DISCOUNT_DEVICES",
-                    "Devices discount: -{amount} ({percent}%)",
-                ).format(
-                    amount=texts.format_price(details["devices_discount_total"]),
-                    percent=details.get("devices_discount_percent", 0),
-                )
-            )
+        traffic_discount_line = build_discount_line(
+            "MINIAPP_PURCHASE_DISCOUNT_TRAFFIC",
+            "Traffic discount: -{amount} ({percent}%)",
+            details.get("traffic_discount_total", 0),
+            details.get("traffic_discount_percent", 0),
+        )
+        if traffic_discount_line:
+            discount_lines.append(traffic_discount_line)
 
+        servers_discount_line = build_discount_line(
+            "MINIAPP_PURCHASE_DISCOUNT_SERVERS",
+            "Servers discount: -{amount} ({percent}%)",
+            details.get("servers_discount_total", 0),
+            details.get("servers_discount_percent", 0),
+        )
+        if servers_discount_line:
+            discount_lines.append(servers_discount_line)
+
+        devices_discount_line = build_discount_line(
+            "MINIAPP_PURCHASE_DISCOUNT_DEVICES",
+            "Devices discount: -{amount} ({percent}%)",
+            details.get("devices_discount_total", 0),
+            details.get("devices_discount_percent", 0),
+        )
+        if devices_discount_line:
+            discount_lines.append(devices_discount_line)
+
+        promo_discount_line = None
         if pricing.promo_discount_value:
-            discount_lines.append(
-                texts.t(
-                    "MINIAPP_PURCHASE_DISCOUNT_PROMO",
-                    "Promo offer: -{amount} ({percent}%)",
-                ).format(
-                    amount=texts.format_price(pricing.promo_discount_value),
-                    percent=pricing.promo_discount_percent,
-                )
+            promo_discount_line = texts.t(
+                "MINIAPP_PURCHASE_DISCOUNT_PROMO",
+                "Promo offer: -{amount} ({percent}%)",
+            ).format(
+                amount=texts.format_price(pricing.promo_discount_value),
+                percent=pricing.promo_discount_percent,
             )
+            discount_lines.append(promo_discount_line)
 
         breakdown = [
             {
@@ -879,49 +890,77 @@ class MiniAppSubscriptionPurchaseService:
             }
         ]
 
+        base_discount_note = build_discount_note(
+            details.get("base_discount_total", 0),
+            details.get("base_discount_percent", 0),
+        )
+        if base_discount_note:
+            breakdown[0]["discount_label"] = base_discount_note
+            breakdown[0]["discountLabel"] = base_discount_note
+
         if details.get("total_traffic_price"):
-            breakdown.append(
-                {
-                    "label": texts.t(
-                        "MINIAPP_PURCHASE_BREAKDOWN_TRAFFIC",
-                        "Traffic",
-                    ),
-                    "value": texts.format_price(details["total_traffic_price"]),
-                }
+            traffic_item = {
+                "label": texts.t(
+                    "MINIAPP_PURCHASE_BREAKDOWN_TRAFFIC",
+                    "Traffic",
+                ),
+                "value": texts.format_price(details["total_traffic_price"]),
+            }
+            traffic_discount_note = build_discount_note(
+                details.get("traffic_discount_total", 0),
+                details.get("traffic_discount_percent", 0),
             )
+            if traffic_discount_note:
+                traffic_item["discount_label"] = traffic_discount_note
+                traffic_item["discountLabel"] = traffic_discount_note
+            breakdown.append(traffic_item)
 
         if details.get("total_servers_price"):
-            breakdown.append(
-                {
-                    "label": texts.t(
-                        "MINIAPP_PURCHASE_BREAKDOWN_SERVERS",
-                        "Servers",
-                    ),
-                    "value": texts.format_price(details["total_servers_price"]),
-                }
+            servers_item = {
+                "label": texts.t(
+                    "MINIAPP_PURCHASE_BREAKDOWN_SERVERS",
+                    "Servers",
+                ),
+                "value": texts.format_price(details["total_servers_price"]),
+            }
+            servers_discount_note = build_discount_note(
+                details.get("servers_discount_total", 0),
+                details.get("servers_discount_percent", 0),
             )
+            if servers_discount_note:
+                servers_item["discount_label"] = servers_discount_note
+                servers_item["discountLabel"] = servers_discount_note
+            breakdown.append(servers_item)
 
         if details.get("total_devices_price"):
-            breakdown.append(
-                {
-                    "label": texts.t(
-                        "MINIAPP_PURCHASE_BREAKDOWN_DEVICES",
-                        "Devices",
-                    ),
-                    "value": texts.format_price(details["total_devices_price"]),
-                }
+            devices_item = {
+                "label": texts.t(
+                    "MINIAPP_PURCHASE_BREAKDOWN_DEVICES",
+                    "Devices",
+                ),
+                "value": texts.format_price(details["total_devices_price"]),
+            }
+            devices_discount_note = build_discount_note(
+                details.get("devices_discount_total", 0),
+                details.get("devices_discount_percent", 0),
             )
+            if devices_discount_note:
+                devices_item["discount_label"] = devices_discount_note
+                devices_item["discountLabel"] = devices_discount_note
+            breakdown.append(devices_item)
 
         if pricing.promo_discount_value:
-            breakdown.append(
-                {
-                    "label": texts.t(
-                        "MINIAPP_PURCHASE_BREAKDOWN_PROMO",
-                        "Promo discount",
-                    ),
-                    "value": f"- {texts.format_price(pricing.promo_discount_value)}",
-                }
-            )
+            promo_item = {
+                "label": texts.t(
+                    "MINIAPP_PURCHASE_BREAKDOWN_PROMO",
+                    "Promo discount",
+                ),
+                "value": f"- {texts.format_price(pricing.promo_discount_value)}",
+            }
+            if promo_discount_line:
+                promo_item["discount_label"] = promo_discount_line
+                promo_item["discountLabel"] = promo_discount_line
+            breakdown.append(promo_item)
 
         missing = max(0, pricing.final_total - context.balance_kopeks)
         status_message = ""
@@ -948,6 +987,18 @@ class MiniAppSubscriptionPurchaseService:
             else None,
             "discount_percent": overall_discount_percent,
             "discountPercent": overall_discount_percent,
+            "discount_label": texts.t(
+                "MINIAPP_PURCHASE_SUMMARY_DISCOUNT",
+                "You save {amount}",
+            ).format(amount=texts.format_price(total_discount))
+            if total_discount
+            else None,
+            "discountLabel": texts.t(
+                "MINIAPP_PURCHASE_SUMMARY_DISCOUNT",
+                "You save {amount}",
+            ).format(amount=texts.format_price(total_discount))
+            if total_discount
+            else None,
             "discount_lines": discount_lines,
             "discountLines": discount_lines,
             "per_month_price_kopeks": per_month_price,

app/webapi/routes/miniapp.py

@@ -25,12 +25,18 @@ from app.database.crud.promo_group import get_auto_assign_promo_groups
 from app.database.crud.rules import get_rules_by_language
 from app.database.crud.promo_offer_template import get_promo_offer_template_by_id
 from app.database.crud.server_squad import (
-    get_available_server_squads,
-    get_server_squad_by_uuid,
     add_user_to_servers,
+    get_available_server_squads,
+    get_server_ids_by_uuids,
+    get_server_squad_by_uuid,
     remove_user_from_servers,
 )
-from app.database.crud.subscription import add_subscription_servers, remove_subscription_servers
+from app.database.crud.subscription import (
+    add_subscription_servers,
+    calculate_subscription_total_cost,
+    extend_subscription,
+    remove_subscription_servers,
+)
 from app.database.crud.transaction import (
     create_transaction,
     get_user_total_spent_kopeks,
@@ -75,9 +81,13 @@ from app.utils.user_utils import (
 )
 from app.utils.pricing_utils import (
     apply_percentage_discount,
+    calculate_months_from_days,
     calculate_prorated_price,
+    format_period_description,
     get_remaining_months,
+    validate_pricing_calculation,
 )
+from app.utils.promo_offer import get_user_active_promo_discount_percent
 
 from ..dependencies import get_db_session
 from ..schemas.miniapp import (
@@ -137,6 +147,11 @@ from ..schemas.miniapp import (
     MiniAppSubscriptionPurchasePreviewResponse,
     MiniAppSubscriptionPurchaseRequest,
     MiniAppSubscriptionPurchaseResponse,
+    MiniAppSubscriptionRenewalOptionsRequest,
+    MiniAppSubscriptionRenewalOptionsResponse,
+    MiniAppSubscriptionRenewalPeriod,
+    MiniAppSubscriptionRenewalRequest,
+    MiniAppSubscriptionRenewalResponse,
 )
 
 
@@ -177,6 +192,9 @@ _PAYMENT_FAILURE_STATUSES = {
 }
 
 
+_PERIOD_ID_PATTERN = re.compile(r"(\d+)")
+
+
 async def _get_usd_to_rub_rate() -> float:
     try:
         rate = await currency_converter.get_usd_to_rub_rate()
@@ -2753,6 +2771,231 @@ def _extract_promo_discounts(group: Optional[PromoGroup]) -> Dict[str, Any]:
     }
 
 
+def _normalize_language_code(user: Optional[User]) -> str:
+    language = getattr(user, "language", None) or settings.DEFAULT_LANGUAGE or "ru"
+    return language.split("-")[0].lower()
+
+
+def _build_renewal_status_message(user: Optional[User]) -> str:
+    language_code = _normalize_language_code(user)
+    if language_code == "ru":
+        return "Стоимость указана с учётом ваших текущих серверов, трафика и устройств."
+    return "Prices already include your current servers, traffic, and devices."
+
+
+def _build_promo_offer_payload(user: Optional[User]) -> Optional[Dict[str, Any]]:
+    percent = get_user_active_promo_discount_percent(user)
+    if percent <= 0:
+        return None
+
+    payload: Dict[str, Any] = {"percent": percent}
+
+    expires_at = getattr(user, "promo_offer_discount_expires_at", None)
+    if expires_at:
+        payload["expires_at"] = expires_at
+
+    language_code = _normalize_language_code(user)
+    if language_code == "ru":
+        payload["message"] = "Дополнительная скидка применяется автоматически."
+    else:
+        payload["message"] = "Extra discount is applied automatically."
+
+    return payload
+
+
+def _build_renewal_period_id(period_days: int) -> str:
+    return f"days:{period_days}"
+
+
+def _parse_period_identifier(identifier: Optional[str]) -> Optional[int]:
+    if not identifier:
+        return None
+
+    match = _PERIOD_ID_PATTERN.search(str(identifier))
+    if not match:
+        return None
+
+    try:
+        return int(match.group(1))
+    except (TypeError, ValueError):
+        return None
+
+
+async def _calculate_subscription_renewal_pricing(
+    db: AsyncSession,
+    user: User,
+    subscription: Subscription,
+    period_days: int,
+) -> Dict[str, Any]:
+    connected_uuids = [str(uuid) for uuid in list(subscription.connected_squads or [])]
+    server_ids: List[int] = []
+    if connected_uuids:
+        server_ids = await get_server_ids_by_uuids(db, connected_uuids)
+
+    traffic_limit = subscription.traffic_limit_gb
+    if traffic_limit is None:
+        traffic_limit = settings.DEFAULT_TRAFFIC_LIMIT_GB
+
+    devices_limit = subscription.device_limit or settings.DEFAULT_DEVICE_LIMIT
+
+    total_cost, details = await calculate_subscription_total_cost(
+        db,
+        period_days,
+        int(traffic_limit or 0),
+        server_ids,
+        int(devices_limit or 0),
+        user=user,
+    )
+
+    months = details.get("months_in_period") or calculate_months_from_days(period_days)
+
+    base_original_total = (
+        details.get("base_price_original", 0)
+        + details.get("traffic_price_per_month", 0) * months
+        + details.get("servers_price_per_month", 0) * months
+        + details.get("devices_price_per_month", 0) * months
+    )
+
+    discounted_total = total_cost
+
+    monthly_additions = 0
+    if months > 0:
+        monthly_additions = (
+            details.get("total_servers_price", 0) // months
+            + details.get("total_devices_price", 0) // months
+            + details.get("total_traffic_price", 0) // months
+        )
+
+    if not validate_pricing_calculation(
+        details.get("base_price", 0),
+        monthly_additions,
+        months,
+        discounted_total,
+    ):
+        logger.warning(
+            "Renewal pricing validation failed for subscription %s (period %s)",
+            subscription.id,
+            period_days,
+        )
+
+    promo_percent = get_user_active_promo_discount_percent(user)
+    final_total = discounted_total
+    promo_discount_value = 0
+    if promo_percent > 0 and discounted_total > 0:
+        final_total, promo_discount_value = apply_percentage_discount(
+            discounted_total,
+            promo_percent,
+        )
+
+    overall_discount_value = max(0, base_original_total - final_total)
+    overall_discount_percent = 0
+    if base_original_total > 0 and overall_discount_value > 0:
+        overall_discount_percent = int(
+            round(overall_discount_value * 100 / base_original_total)
+        )
+
+    per_month = final_total // months if months else final_total
+
+    pricing_payload: Dict[str, Any] = {
+        "period_id": _build_renewal_period_id(period_days),
+        "period_days": period_days,
+        "months": months,
+        "base_original_total": base_original_total,
+        "discounted_total": discounted_total,
+        "final_total": final_total,
+        "promo_discount_value": promo_discount_value,
+        "promo_discount_percent": promo_percent if promo_discount_value else 0,
+        "overall_discount_percent": overall_discount_percent,
+        "per_month": per_month,
+        "server_ids": list(server_ids),
+        "details": details,
+    }
+
+    return pricing_payload
+
+
+async def _prepare_subscription_renewal_options(
+    db: AsyncSession,
+    user: User,
+    subscription: Subscription,
+) -> Tuple[List[MiniAppSubscriptionRenewalPeriod], Dict[Union[str, int], Dict[str, Any]], Optional[str]]:
+    available_periods = [
+        period for period in settings.get_available_renewal_periods() if period > 0
+    ]
+
+    option_payloads: List[Tuple[MiniAppSubscriptionRenewalPeriod, Dict[str, Any]]] = []
+
+    for period_days in available_periods:
+        try:
+            pricing = await _calculate_subscription_renewal_pricing(
+                db,
+                user,
+                subscription,
+                period_days,
+            )
+        except Exception as error:  # pragma: no cover - defensive logging
+            logger.warning(
+                "Failed to calculate renewal pricing for subscription %s (period %s): %s",
+                subscription.id,
+                period_days,
+                error,
+            )
+            continue
+
+        label = format_period_description(
+            period_days,
+            getattr(user, "language", settings.DEFAULT_LANGUAGE),
+        )
+
+        price_label = settings.format_price(pricing["final_total"])
+        original_label = None
+        if pricing["base_original_total"] and pricing["base_original_total"] != pricing["final_total"]:
+            original_label = settings.format_price(pricing["base_original_total"])
+
+        per_month_label = settings.format_price(pricing["per_month"])
+
+        option_model = MiniAppSubscriptionRenewalPeriod(
+            id=pricing["period_id"],
+            days=period_days,
+            months=pricing["months"],
+            price_kopeks=pricing["final_total"],
+            price_label=price_label,
+            original_price_kopeks=pricing["base_original_total"],
+            original_price_label=original_label,
+            discount_percent=pricing["overall_discount_percent"],
+            price_per_month_kopeks=pricing["per_month"],
+            price_per_month_label=per_month_label,
+            title=label,
+        )
+
+        option_payloads.append((option_model, pricing))
+
+    if not option_payloads:
+        return [], {}, None
+
+    option_payloads.sort(key=lambda item: item[0].days or 0)
+
+    recommended_option = max(
+        option_payloads,
+        key=lambda item: (
+            item[1]["overall_discount_percent"],
+            item[0].months or 0,
+            -(item[1]["final_total"] or 0),
+        ),
+    )
+    recommended_option[0].is_recommended = True
+
+    pricing_map: Dict[Union[str, int], Dict[str, Any]] = {}
+    for option_model, pricing in option_payloads:
+        pricing_map[option_model.id] = pricing
+        pricing_map[pricing["period_days"]] = pricing
+        pricing_map[str(pricing["period_days"])] = pricing
+
+    periods = [item[0] for item in option_payloads]
+
+    return periods, pricing_map, recommended_option[0].id
+
+
 def _get_addon_discount_percent_for_user(
     user: Optional[User],
     category: str,
@@ -3144,6 +3387,261 @@ async def _build_subscription_settings(
     return settings_payload
 
 
+@router.post(
+    "/subscription/renewal/options",
+    response_model=MiniAppSubscriptionRenewalOptionsResponse,
+)
+async def get_subscription_renewal_options_endpoint(
+    payload: MiniAppSubscriptionRenewalOptionsRequest,
+    db: AsyncSession = Depends(get_db_session),
+) -> MiniAppSubscriptionRenewalOptionsResponse:
+    user = await _authorize_miniapp_user(payload.init_data, db)
+    subscription = _ensure_paid_subscription(user)
+    _validate_subscription_id(payload.subscription_id, subscription)
+
+    periods, pricing_map, default_period_id = await _prepare_subscription_renewal_options(
+        db,
+        user,
+        subscription,
+    )
+
+    balance_kopeks = getattr(user, "balance_kopeks", 0)
+    currency = (getattr(user, "balance_currency", None) or "RUB").upper()
+
+    promo_group = getattr(user, "promo_group", None)
+    promo_group_model = (
+        MiniAppPromoGroup(
+            id=promo_group.id,
+            name=promo_group.name,
+            **_extract_promo_discounts(promo_group),
+        )
+        if promo_group
+        else None
+    )
+
+    promo_offer_payload = _build_promo_offer_payload(user)
+
+    missing_amount = None
+    if default_period_id and default_period_id in pricing_map:
+        selected_pricing = pricing_map[default_period_id]
+        final_total = selected_pricing.get("final_total")
+        if isinstance(final_total, int) and balance_kopeks < final_total:
+            missing_amount = final_total - balance_kopeks
+
+    return MiniAppSubscriptionRenewalOptionsResponse(
+        subscription_id=subscription.id,
+        currency=currency,
+        balance_kopeks=balance_kopeks,
+        balance_label=settings.format_price(balance_kopeks),
+        promo_group=promo_group_model,
+        promo_offer=promo_offer_payload,
+        periods=periods,
+        default_period_id=default_period_id,
+        missing_amount_kopeks=missing_amount,
+        status_message=_build_renewal_status_message(user),
+    )
+
+
+@router.post(
+    "/subscription/renewal",
+    response_model=MiniAppSubscriptionRenewalResponse,
+)
+async def submit_subscription_renewal_endpoint(
+    payload: MiniAppSubscriptionRenewalRequest,
+    db: AsyncSession = Depends(get_db_session),
+) -> MiniAppSubscriptionRenewalResponse:
+    user = await _authorize_miniapp_user(payload.init_data, db)
+    subscription = _ensure_paid_subscription(user)
+    _validate_subscription_id(payload.subscription_id, subscription)
+
+    period_days: Optional[int] = None
+    if payload.period_days is not None:
+        try:
+            period_days = int(payload.period_days)
+        except (TypeError, ValueError) as error:
+            raise HTTPException(
+                status.HTTP_400_BAD_REQUEST,
+                detail={"code": "invalid_period", "message": "Invalid renewal period"},
+            ) from error
+
+    if period_days is None:
+        period_days = _parse_period_identifier(payload.period_id)
+
+    if period_days is None or period_days <= 0:
+        raise HTTPException(
+            status.HTTP_400_BAD_REQUEST,
+            detail={"code": "invalid_period", "message": "Invalid renewal period"},
+        )
+
+    available_periods = [
+        period for period in settings.get_available_renewal_periods() if period > 0
+    ]
+    if period_days not in available_periods:
+        raise HTTPException(
+            status.HTTP_400_BAD_REQUEST,
+            detail={"code": "period_unavailable", "message": "Selected renewal period is not available"},
+        )
+
+    try:
+        pricing = await _calculate_subscription_renewal_pricing(
+            db,
+            user,
+            subscription,
+            period_days,
+        )
+    except HTTPException:
+        raise
+    except Exception as error:
+        logger.error(
+            "Failed to calculate renewal pricing for subscription %s (period %s): %s",
+            subscription.id,
+            period_days,
+            error,
+        )
+        raise HTTPException(
+            status.HTTP_502_BAD_GATEWAY,
+            detail={"code": "pricing_failed", "message": "Failed to calculate renewal pricing"},
+        ) from error
+
+    final_total = int(pricing.get("final_total") or 0)
+    balance_kopeks = getattr(user, "balance_kopeks", 0)
+
+    if final_total > 0 and balance_kopeks < final_total:
+        missing = final_total - balance_kopeks
+        raise HTTPException(
+            status.HTTP_402_PAYMENT_REQUIRED,
+            detail={
+                "code": "insufficient_funds",
+                "message": "Not enough funds to renew the subscription",
+                "missing_amount_kopeks": missing,
+            },
+        )
+
+    consume_promo_offer = bool(pricing.get("promo_discount_value"))
+    description = f"Продление подписки на {period_days} дней"
+
+    should_charge_balance = final_total > 0 or consume_promo_offer
+
+    if should_charge_balance:
+        success = await subtract_user_balance(
+            db,
+            user,
+            final_total,
+            description,
+            consume_promo_offer=consume_promo_offer,
+        )
+        if not success:
+            raise HTTPException(
+                status.HTTP_500_INTERNAL_SERVER_ERROR,
+                detail={"code": "charge_failed", "message": "Failed to charge balance"},
+            )
+        await db.refresh(user)
+
+    subscription = await extend_subscription(db, subscription, period_days)
+
+    server_ids = pricing.get("server_ids") or []
+    server_prices_for_period = pricing.get("details", {}).get(
+        "servers_individual_prices",
+        [],
+    )
+    if server_ids:
+        try:
+            await add_subscription_servers(
+                db,
+                subscription,
+                server_ids,
+                server_prices_for_period,
+            )
+        except Exception as error:  # pragma: no cover - defensive logging
+            logger.warning(
+                "Failed to record renewal server prices for subscription %s: %s",
+                subscription.id,
+                error,
+            )
+
+    subscription_service = SubscriptionService()
+    try:
+        await subscription_service.update_remnawave_user(
+            db,
+            subscription,
+            reset_traffic=settings.RESET_TRAFFIC_ON_PAYMENT,
+            reset_reason="subscription renewal",
+        )
+    except RemnaWaveConfigurationError as error:  # pragma: no cover - configuration issues
+        logger.warning("RemnaWave update skipped: %s", error)
+    except Exception as error:  # pragma: no cover - defensive logging
+        logger.error(
+            "Failed to update RemnaWave user for subscription %s: %s",
+            subscription.id,
+            error,
+        )
+
+    try:
+        await create_transaction(
+            db=db,
+            user_id=user.id,
+            type=TransactionType.SUBSCRIPTION_PAYMENT,
+            amount_kopeks=final_total,
+            description=description,
+        )
+    except Exception as error:  # pragma: no cover - defensive logging
+        logger.warning(
+            "Failed to create renewal transaction for subscription %s: %s",
+            subscription.id,
+            error,
+        )
+
+    await db.refresh(user)
+    await db.refresh(subscription)
+
+    language_code = _normalize_language_code(user)
+    amount_label = settings.format_price(final_total)
+    date_label = (
+        subscription.end_date.strftime("%d.%m.%Y %H:%M")
+        if subscription.end_date
+        else ""
+    )
+
+    if language_code == "ru":
+        if final_total > 0:
+            message = (
+                f"Подписка продлена до {date_label}. " if date_label else "Подписка продлена. "
+            ) + f"Списано {amount_label}."
+        else:
+            message = (
+                f"Подписка продлена до {date_label}."
+                if date_label
+                else "Подписка успешно продлена."
+            )
+    else:
+        if final_total > 0:
+            message = (
+                f"Subscription renewed until {date_label}. " if date_label else "Subscription renewed. "
+            ) + f"Charged {amount_label}."
+        else:
+            message = (
+                f"Subscription renewed until {date_label}."
+                if date_label
+                else "Subscription renewed successfully."
+            )
+
+    promo_discount_value = pricing.get("promo_discount_value") or 0
+    if consume_promo_offer and promo_discount_value > 0:
+        discount_label = settings.format_price(promo_discount_value)
+        if language_code == "ru":
+            message += f" Применена дополнительная скидка {discount_label}."
+        else:
+            message += f" Promo discount applied: {discount_label}."
+
+    return MiniAppSubscriptionRenewalResponse(
+        message=message,
+        balance_kopeks=user.balance_kopeks,
+        balance_label=settings.format_price(user.balance_kopeks),
+        subscription_id=subscription.id,
+        renewed_until=subscription.end_date,
+    )
+
+
 @router.post(
     "/subscription/purchase/options",
     response_model=MiniAppSubscriptionPurchaseOptionsResponse,

app/webapi/schemas/miniapp.py

@@ -134,6 +134,68 @@ class MiniAppPromoOfferClaimResponse(BaseModel):
     code: Optional[str] = None
 
 
+class MiniAppSubscriptionRenewalPeriod(BaseModel):
+    id: str
+    days: Optional[int] = None
+    months: Optional[int] = None
+    price_kopeks: Optional[int] = Field(default=None, alias="priceKopeks")
+    price_label: Optional[str] = Field(default=None, alias="priceLabel")
+    original_price_kopeks: Optional[int] = Field(default=None, alias="originalPriceKopeks")
+    original_price_label: Optional[str] = Field(default=None, alias="originalPriceLabel")
+    discount_percent: int = Field(default=0, alias="discountPercent")
+    price_per_month_kopeks: Optional[int] = Field(default=None, alias="pricePerMonthKopeks")
+    price_per_month_label: Optional[str] = Field(default=None, alias="pricePerMonthLabel")
+    is_recommended: bool = Field(default=False, alias="isRecommended")
+    description: Optional[str] = None
+    badge: Optional[str] = None
+    title: Optional[str] = None
+
+    model_config = ConfigDict(populate_by_name=True)
+
+
+class MiniAppSubscriptionRenewalOptionsRequest(BaseModel):
+    init_data: str = Field(..., alias="initData")
+    subscription_id: Optional[int] = Field(default=None, alias="subscriptionId")
+
+    model_config = ConfigDict(populate_by_name=True)
+
+
+class MiniAppSubscriptionRenewalOptionsResponse(BaseModel):
+    success: bool = True
+    subscription_id: Optional[int] = Field(default=None, alias="subscriptionId")
+    currency: str
+    balance_kopeks: Optional[int] = Field(default=None, alias="balanceKopeks")
+    balance_label: Optional[str] = Field(default=None, alias="balanceLabel")
+    promo_group: Optional[MiniAppPromoGroup] = Field(default=None, alias="promoGroup")
+    promo_offer: Optional[Dict[str, Any]] = Field(default=None, alias="promoOffer")
+    periods: List[MiniAppSubscriptionRenewalPeriod] = Field(default_factory=list)
+    default_period_id: Optional[str] = Field(default=None, alias="defaultPeriodId")
+    missing_amount_kopeks: Optional[int] = Field(default=None, alias="missingAmountKopeks")
+    status_message: Optional[str] = Field(default=None, alias="statusMessage")
+
+    model_config = ConfigDict(populate_by_name=True)
+
+
+class MiniAppSubscriptionRenewalRequest(BaseModel):
+    init_data: str = Field(..., alias="initData")
+    subscription_id: Optional[int] = Field(default=None, alias="subscriptionId")
+    period_id: Optional[str] = Field(default=None, alias="periodId")
+    period_days: Optional[int] = Field(default=None, alias="periodDays")
+
+    model_config = ConfigDict(populate_by_name=True)
+
+
+class MiniAppSubscriptionRenewalResponse(BaseModel):
+    success: bool = True
+    message: Optional[str] = None
+    balance_kopeks: Optional[int] = Field(default=None, alias="balanceKopeks")
+    balance_label: Optional[str] = Field(default=None, alias="balanceLabel")
+    subscription_id: Optional[int] = Field(default=None, alias="subscriptionId")
+    renewed_until: Optional[datetime] = Field(default=None, alias="renewedUntil")
+
+    model_config = ConfigDict(populate_by_name=True)
+
+
 class MiniAppPromoCode(BaseModel):
     code: str
     type: Optional[str] = None

locales/en.json

@@ -396,11 +396,13 @@
   "MINIAPP_PURCHASE_DISCOUNT_SERVERS": "Servers discount: -{amount} ({percent}%)",
   "MINIAPP_PURCHASE_DISCOUNT_DEVICES": "Devices discount: -{amount} ({percent}%)",
   "MINIAPP_PURCHASE_DISCOUNT_PROMO": "Promo offer: -{amount} ({percent}%)",
+  "MINIAPP_PURCHASE_BREAKDOWN_DISCOUNT_NOTE": "Discount: -{amount} ({percent}%)",
   "MINIAPP_PURCHASE_BREAKDOWN_BASE": "Base plan",
   "MINIAPP_PURCHASE_BREAKDOWN_TRAFFIC": "Traffic",
   "MINIAPP_PURCHASE_BREAKDOWN_SERVERS": "Servers",
   "MINIAPP_PURCHASE_BREAKDOWN_DEVICES": "Devices",
   "MINIAPP_PURCHASE_BREAKDOWN_PROMO": "Promo discount",
+  "MINIAPP_PURCHASE_SUMMARY_DISCOUNT": "You save {amount}",
   "MINIAPP_PURCHASE_STATUS_INSUFFICIENT": "Not enough funds on balance",
   "SUBSCRIPTION_SUMMARY": "\n📋 <b>Final configuration</b>\n\n📅 <b>Period:</b> {period} days\n📈 <b>Traffic:</b> {traffic}\n🌍 <b>Countries:</b> {countries}\n📱 <b>Devices:</b> {devices}\n\n💰 <b>Total:</b> {total_price}\n\nConfirm the purchase?\n",
   "SUBSCRIPTION_TRIAL": "🧪 Trial subscription",

locales/ru.json

@@ -369,11 +369,13 @@
   "MINIAPP_PURCHASE_DISCOUNT_SERVERS": "Скидка на серверы: -{amount} ({percent}%)",
   "MINIAPP_PURCHASE_DISCOUNT_DEVICES": "Скидка на устройства: -{amount} ({percent}%)",
   "MINIAPP_PURCHASE_DISCOUNT_PROMO": "Промо-предложение: -{amount} ({percent}%)",
+  "MINIAPP_PURCHASE_BREAKDOWN_DISCOUNT_NOTE": "Скидка: -{amount} ({percent}%)",
   "MINIAPP_PURCHASE_BREAKDOWN_BASE": "Базовый план",
   "MINIAPP_PURCHASE_BREAKDOWN_TRAFFIC": "Трафик",
   "MINIAPP_PURCHASE_BREAKDOWN_SERVERS": "Серверы",
   "MINIAPP_PURCHASE_BREAKDOWN_DEVICES": "Устройства",
   "MINIAPP_PURCHASE_BREAKDOWN_PROMO": "Промо скидка",
+  "MINIAPP_PURCHASE_SUMMARY_DISCOUNT": "Экономия {amount}",
   "MINIAPP_PURCHASE_STATUS_INSUFFICIENT": "Недостаточно средств на балансе",
   "SUBSCRIPTION_SETTINGS_BUTTON": "⚙️ Настройки подписки",
   "SUBSCRIPTION_SUMMARY": "\n📋 <b>Итоговая конфигурация</b>\n\n📅 <b>Период:</b> {period} дней\n📈 <b>Трафик:</b> {traffic}\n🌍 <b>Страны:</b> {countries}\n📱 <b>Устройства:</b> {devices}\n\n💰 <b>Итого к оплате:</b> {total_price}\n\nПодтвердить покупку?\n",