fix: bind HWID top-ups to subscription periods

backend/bot/services/panel_webhook_service.py

@@ -17,7 +17,7 @@ from bot.keyboards.inline.user_keyboards import (
 )
 from bot.middlewares.i18n import JsonI18n
 from config.settings import Settings
-from db.dal import user_dal
+from db.dal import tariff_dal, user_dal
 
 from .email_auth_service import EmailAuthService
 from .email_templates import render_subscription_expiring
@@ -63,13 +63,46 @@ class PanelWebhookService:
         **kwargs,
     ):
         _ = lambda k, **kw: self.i18n.gettext(lang, k, **kw)
+        extra_text = str(kwargs.pop("extra_text", "") or "").strip()
         try:
+            text = _(message_key, **kwargs)
+            if extra_text:
+                text = f"{text}\n\n{extra_text}"
             await self.bot.send_message(
-                user_id, _(message_key, **kwargs), reply_markup=reply_markup
+                user_id, text, reply_markup=reply_markup
             )
         except Exception:
             logging.exception("Failed to send notification to %s", user_id)
 
+    async def _hwid_renewal_note(self, internal_user_id: int, lang: str) -> str:
+        try:
+            from db.dal import subscription_dal
+
+            async with self.async_session_factory() as session:
+                sub = await subscription_dal.get_active_subscription_by_user_id(
+                    session, internal_user_id
+                )
+                if not sub:
+                    return ""
+                summary = await tariff_dal.get_hwid_device_entitlement_summary(
+                    session,
+                    subscription_id=sub.subscription_id,
+                )
+                count = int(summary.get("active_devices") or sub.extra_hwid_devices or 0)
+                if count <= 0:
+                    return ""
+                active_until = summary.get("active_until") or sub.end_date
+                date_text = active_until.strftime("%Y-%m-%d") if active_until else ""
+        except Exception:
+            logging.exception("Failed to build HWID renewal note for user %s", internal_user_id)
+            return ""
+        return self.i18n.gettext(
+            lang,
+            "subscription_hwid_renewal_reminder",
+            count=count,
+            date=date_text,
+        )
+
     async def handle_event(self, event_name: str, user_payload: dict):
         telegram_id = user_payload.get("telegramId")
         if not telegram_id:
@@ -97,6 +130,7 @@ class PanelWebhookService:
 
         if event_name in EVENT_MAP:
             days_left, msg_key = EVENT_MAP[event_name]
+            hwid_renewal_note = await self._hwid_renewal_note(internal_user_id, lang)
             if days_left == 1:
                 # Trigger auto-renew via SubscriptionService (wired in at factory)
                 try:
@@ -148,6 +182,7 @@ class PanelWebhookService:
                                 "autorenew_48h_charge_tomorrow_notice",
                                 reply_markup=cancel_kb,
                                 user_name=first_name,
+                                extra_text=hwid_renewal_note,
                             )
                             return
                 await self._send_message(
@@ -157,6 +192,7 @@ class PanelWebhookService:
                     reply_markup=markup,
                     user_name=first_name,
                     end_date=user_payload.get("expireAt", "")[:10],
+                    extra_text=hwid_renewal_note,
                 )
                 if days_left == 3 and user_email:
                     await self._send_subscription_expiring_email(

backend/bot/services/subscription_service_impl/devices.py

@@ -3,6 +3,190 @@ from ._runtime import *  # noqa: F403,F405
 
 
 class HwidDeviceMixin:
+    @staticmethod
+    def _as_aware_utc(value: Optional[datetime]) -> Optional[datetime]:
+        if value is None:
+            return None
+        if value.tzinfo is None:
+            return value.replace(tzinfo=timezone.utc)
+        return value
+
+    async def _active_hwid_extra_devices_for_sub(
+        self,
+        session: AsyncSession,
+        sub: Subscription,
+        *,
+        at: Optional[datetime] = None,
+    ) -> int:
+        try:
+            return await tariff_dal.sum_active_hwid_devices(
+                session,
+                subscription_id=sub.subscription_id,
+                at=at or datetime.now(timezone.utc),
+            )
+        except Exception:
+            logging.exception(
+                "Failed to recalculate active HWID devices for subscription %s",
+                getattr(sub, "subscription_id", None),
+            )
+            return int(getattr(sub, "extra_hwid_devices", 0) or 0)
+
+    async def _hwid_topup_validity_window(
+        self,
+        session: AsyncSession,
+        sub: Subscription,
+        *,
+        renewal: bool,
+        now: datetime,
+    ) -> Optional[Tuple[datetime, datetime, Dict[str, Any]]]:
+        valid_until = self._as_aware_utc(getattr(sub, "end_date", None))
+        if not valid_until or valid_until <= now:
+            return None
+
+        summary = await tariff_dal.get_hwid_device_entitlement_summary(
+            session,
+            subscription_id=sub.subscription_id,
+            at=now,
+        )
+        valid_from = now
+        if renewal:
+            active_until = self._as_aware_utc(summary.get("active_until"))
+            if active_until and now < active_until < valid_until:
+                valid_from = active_until
+            elif active_until and active_until >= valid_until:
+                return None
+        return valid_from, valid_until, summary
+
+    @staticmethod
+    def _round_hwid_price(value: float, *, currency: str) -> float:
+        if value <= 0:
+            return 0.0
+        if currency == "stars":
+            return float(math.ceil(value))
+        return math.ceil(float(value) * 100) / 100
+
+    @staticmethod
+    def _find_hwid_package(tariff: Tariff, device_count: int, currency: str) -> Optional[Any]:
+        package_set = tariff.hwid_device_packages
+        if not package_set:
+            return None
+        packages = package_set.for_currency("stars" if currency == "stars" else "rub")
+        return next((pkg for pkg in packages if int(pkg.count) == int(device_count)), None)
+
+    def _quote_hwid_package_price(
+        self,
+        *,
+        sub: Subscription,
+        package: Any,
+        valid_from: datetime,
+        valid_until: datetime,
+        now: datetime,
+        currency: str,
+    ) -> Dict[str, Any]:
+        period_months = max(1, int(getattr(sub, "duration_months", None) or 1))
+        full_price = float(package.price_for_period(period_months))
+        period_start = self._as_aware_utc(getattr(sub, "start_date", None))
+        period_end = self._as_aware_utc(getattr(sub, "end_date", None)) or valid_until
+        if not period_start or period_start >= period_end:
+            period_start = valid_from
+            period_end = valid_until
+
+        basis_seconds = max(1.0, (period_end - period_start).total_seconds())
+        billable_start = max(now, valid_from)
+        billable_seconds = max(0.0, (valid_until - billable_start).total_seconds())
+        ratio = billable_seconds / basis_seconds
+        raw_price = full_price * ratio
+        price = self._round_hwid_price(raw_price, currency=currency)
+        min_price = getattr(package, "min_price", None)
+        if raw_price > 0 and min_price is not None:
+            price = max(price, self._round_hwid_price(float(min_price), currency=currency))
+        if currency == "stars":
+            price = float(int(math.ceil(price)))
+
+        return {
+            "price": price,
+            "full_price": full_price,
+            "pricing_period_months": period_months,
+            "proration_ratio": ratio,
+            "valid_from": valid_from,
+            "valid_until": valid_until,
+            "billable_seconds": billable_seconds,
+            "period_seconds": basis_seconds,
+            "currency": currency,
+        }
+
+    async def quote_hwid_device_topup(
+        self,
+        session: AsyncSession,
+        *,
+        user_id: int,
+        device_count: int,
+        tariff_key: Optional[str] = None,
+        renewal: bool = False,
+        currency: str = "rub",
+        now: Optional[datetime] = None,
+    ) -> Optional[Dict[str, Any]]:
+        try:
+            purchased_devices = int(device_count)
+        except (TypeError, ValueError):
+            return None
+        if purchased_devices <= 0:
+            return None
+
+        db_user = await user_dal.get_user_by_id(session, user_id)
+        if not db_user or not db_user.panel_user_uuid:
+            return None
+        sub = await subscription_dal.get_active_subscription_by_user_id(
+            session, user_id, db_user.panel_user_uuid
+        )
+        if not sub:
+            return None
+
+        tariff = self._resolve_tariff(tariff_key or sub.tariff_key)
+        if not tariff or tariff.billing_model != "period":
+            return None
+        base_hwid_limit = (
+            int(sub.hwid_device_limit)
+            if sub.hwid_device_limit is not None
+            else self._base_hwid_limit_for_tariff(tariff)
+        )
+        if base_hwid_limit == 0:
+            return None
+
+        package = self._find_hwid_package(tariff, purchased_devices, currency)
+        if not package:
+            return None
+
+        now = now or datetime.now(timezone.utc)
+        window = await self._hwid_topup_validity_window(
+            session,
+            sub,
+            renewal=renewal,
+            now=now,
+        )
+        if not window:
+            return None
+        valid_from, valid_until, entitlement_summary = window
+        quote = self._quote_hwid_package_price(
+            sub=sub,
+            package=package,
+            valid_from=valid_from,
+            valid_until=valid_until,
+            now=now,
+            currency="stars" if currency == "stars" else "rub",
+        )
+        quote.update(
+            {
+                "subscription_id": sub.subscription_id,
+                "tariff_key": tariff.key,
+                "device_count": purchased_devices,
+                "renewal": renewal,
+                "active_extra_devices": int(entitlement_summary.get("active_devices") or 0),
+                "active_until": entitlement_summary.get("active_until"),
+            }
+        )
+        return quote
+
     async def activate_hwid_device_topup(
         self,
         session: AsyncSession,
@@ -12,6 +196,7 @@ class HwidDeviceMixin:
         payment_db_id: int,
         provider: str = "yookassa",
         tariff_key: Optional[str] = None,
+        renewal: bool = False,
     ) -> Optional[Dict[str, Any]]:
         try:
             purchased_devices = int(device_count)
@@ -33,6 +218,14 @@ class HwidDeviceMixin:
         tariff = None
         if self._tariffs_config():
             tariff = self._resolve_tariff(tariff_key or sub.tariff_key)
+            if tariff.billing_model != "period":
+                logging.info(
+                    "Skipping HWID top-up for user %s because tariff %s is %s",
+                    user_id,
+                    tariff.key,
+                    tariff.billing_model,
+                )
+                return None
             packages = (
                 [*tariff.hwid_device_packages.rub, *tariff.hwid_device_packages.stars]
                 if tariff.hwid_device_packages
@@ -66,14 +259,60 @@ class HwidDeviceMixin:
                 "purchased_hwid_devices": 0,
             }
 
-        new_extra_devices = int(sub.extra_hwid_devices or 0) + purchased_devices
+        now = datetime.now(timezone.utc)
+        payment = await payment_dal.get_payment_by_db_id(session, payment_db_id)
+        entitlement_summary = await tariff_dal.get_hwid_device_entitlement_summary(
+            session,
+            subscription_id=sub.subscription_id,
+            at=now,
+        )
+        valid_from = self._as_aware_utc(getattr(payment, "hwid_valid_from", None))
+        valid_until = self._as_aware_utc(getattr(payment, "hwid_valid_until", None))
+        if valid_from and valid_until:
+            if valid_until <= now or valid_from >= valid_until:
+                logging.error(
+                    "Frozen HWID quote is no longer valid for user %s "
+                    "(payment_id=%s, valid_from=%s, valid_until=%s)",
+                    user_id,
+                    payment_db_id,
+                    valid_from,
+                    valid_until,
+                )
+                return None
+        else:
+            window = await self._hwid_topup_validity_window(
+                session,
+                sub,
+                renewal=renewal,
+                now=now,
+            )
+            if window:
+                valid_from, valid_until, entitlement_summary = window
+        if not valid_from or not valid_until:
+            logging.error(
+                "HWID top-up has no valid subscription window for user %s "
+                "(subscription_id=%s, renewal=%s)",
+                user_id,
+                sub.subscription_id,
+                renewal,
+            )
+            return None
+
+        active_extra_devices = int(entitlement_summary.get("active_devices") or 0)
+        starts_now = valid_from <= now < valid_until
+        new_extra_devices = active_extra_devices + (purchased_devices if starts_now else 0)
         effective_hwid_limit = self._effective_hwid_limit(base_hwid_limit, new_extra_devices)
         await self._record_payment_context(
             session,
             payment_db_id,
-            sale_mode="hwid_devices",
+            sale_mode="hwid_devices_renewal" if renewal else "hwid_devices",
             tariff_key=tariff.key if tariff else sub.tariff_key,
             purchased_hwid_devices=purchased_devices,
+            hwid_valid_from=valid_from,
+            hwid_valid_until=valid_until,
+            hwid_pricing_period_months=getattr(payment, "hwid_pricing_period_months", None),
+            hwid_proration_ratio=getattr(payment, "hwid_proration_ratio", None),
+            hwid_full_price=getattr(payment, "hwid_full_price", None),
         )
         updated_sub = await subscription_dal.update_subscription(
             session,
@@ -115,6 +354,8 @@ class HwidDeviceMixin:
             subscription_id=updated_sub.subscription_id,
             payment_id=payment_db_id,
             purchased_devices=purchased_devices,
+            valid_from=valid_from,
+            valid_until=valid_until,
         )
         return {
             "subscription_id": updated_sub.subscription_id,
@@ -127,4 +368,7 @@ class HwidDeviceMixin:
             "extra_hwid_devices": new_extra_devices,
             "purchased_hwid_devices": purchased_devices,
             "tariff_key": tariff.key if tariff else sub.tariff_key,
+            "hwid_devices_valid_from": valid_from,
+            "hwid_devices_valid_until": valid_until,
+            "hwid_devices_renewal": renewal,
         }

backend/bot/services/subscription_service_impl/lifecycle.py

@@ -23,8 +23,15 @@ class SubscriptionLifecycleMixin:
         if not sub:
             return None
         before_tariff_key = sub.tariff_key
-        options = self.calculate_tariff_switch_options(sub, target)
         now = datetime.now(timezone.utc)
+        options = await self.calculate_tariff_switch_options_with_hwid(session, sub, target)
+        converted_hwid_purchase_ids = list(options.get("convertible_hwid_purchase_ids") or [])
+        if converted_hwid_purchase_ids:
+            await tariff_dal.expire_hwid_device_purchases(
+                session,
+                purchase_ids=converted_hwid_purchase_ids,
+                at=now,
+            )
         premium_topup_balance = int(sub.premium_topup_balance_bytes or 0)
         premium_topup_used = int(getattr(sub, "premium_topup_used_bytes", 0) or 0)
         premium_baseline = target.premium_monthly_bytes
@@ -44,8 +51,20 @@ class SubscriptionLifecycleMixin:
         }
         converted_bytes = None
         base_hwid_limit = self._base_hwid_limit_for_tariff(target)
-        extra_hwid_devices = int(sub.extra_hwid_devices or 0)
+        try:
+            extra_hwid_devices = await tariff_dal.sum_active_hwid_devices(
+                session,
+                subscription_id=sub.subscription_id,
+                at=now,
+            )
+        except Exception:
+            logging.exception(
+                "Failed to recalculate HWID devices during tariff switch for user %s",
+                user_id,
+            )
+            extra_hwid_devices = int(sub.extra_hwid_devices or 0)
         update_data["hwid_device_limit"] = base_hwid_limit
+        update_data["extra_hwid_devices"] = extra_hwid_devices
 
         if target.billing_model == "period":
             update_data["tier_baseline_bytes"] = target.monthly_bytes
@@ -154,6 +173,8 @@ class SubscriptionLifecycleMixin:
                 if updated.end_date and target.billing_model == "period"
                 else None,
                 "converted_bytes": converted_bytes,
+                "converted_hwid_value_rub": options.get("converted_hwid_value_rub"),
+                "converted_hwid_days": options.get("converted_hwid_days"),
                 "eff_price_before": sub.effective_monthly_price_rub,
                 "eff_price_after": updated.effective_monthly_price_rub,
             },
@@ -236,7 +257,7 @@ class SubscriptionLifecycleMixin:
                 payment_db_id=payment_db_id,
                 provider=provider,
             )
-        if sale_mode_base in {"hwid_device", "hwid_devices"}:
+        if sale_mode_base in {"hwid_device", "hwid_devices", "hwid_devices_renewal"}:
             target_devices = int(traffic_gb if traffic_gb is not None else months)
             return await self.activate_hwid_device_topup(
                 session=session,
@@ -246,6 +267,7 @@ class SubscriptionLifecycleMixin:
                 payment_db_id=payment_db_id,
                 provider=provider,
                 tariff_key=tariff_key,
+                renewal=sale_mode_base == "hwid_devices_renewal",
             )
         if sale_mode_base == "tariff_upgrade":
             if not tariff_key:
@@ -378,7 +400,25 @@ class SubscriptionLifecycleMixin:
             )
 
         topup_balance_bytes = int(getattr(current_active_sub, "topup_balance_bytes", 0) or 0)
-        extra_hwid_devices = int(getattr(current_active_sub, "extra_hwid_devices", 0) or 0)
+        extra_hwid_devices = 0
+        hwid_devices_valid_until = None
+        if current_active_sub:
+            try:
+                hwid_summary = await tariff_dal.get_hwid_device_entitlement_summary(
+                    session,
+                    subscription_id=current_active_sub.subscription_id,
+                    at=datetime.now(timezone.utc),
+                )
+                extra_hwid_devices = int(hwid_summary.get("active_devices") or 0)
+                hwid_devices_valid_until = hwid_summary.get("active_until")
+            except Exception:
+                logging.exception(
+                    "Failed to recalculate active HWID devices for renewal of user %s",
+                    user_id,
+                )
+                extra_hwid_devices = int(
+                    getattr(current_active_sub, "extra_hwid_devices", 0) or 0
+                )
         premium_topup_balance_bytes = int(
             getattr(current_active_sub, "premium_topup_balance_bytes", 0) or 0
         )
@@ -497,6 +537,8 @@ class SubscriptionLifecycleMixin:
             "subscription_url": final_subscription_url,
             "applied_promo_bonus_days": applied_promo_bonus_days,
             "tariff_key": tariff.key if tariff else None,
+            "hwid_devices_renewal_recommended_count": extra_hwid_devices,
+            "hwid_devices_valid_until": hwid_devices_valid_until,
         }
 
     async def extend_active_subscription_days(
@@ -760,6 +802,43 @@ class SubscriptionLifecycleMixin:
             if local_active_sub
             else False
         )
+        hwid_entitlement_summary: Dict[str, Any] = {}
+        active_extra_hwid_devices = (
+            int(local_active_sub.extra_hwid_devices or 0) if local_active_sub else 0
+        )
+        if local_active_sub:
+            try:
+                hwid_entitlement_summary = await tariff_dal.get_hwid_device_entitlement_summary(
+                    session,
+                    subscription_id=local_active_sub.subscription_id,
+                    at=datetime.now(timezone.utc),
+                )
+                active_extra_hwid_devices = int(
+                    hwid_entitlement_summary.get("active_devices") or 0
+                )
+                if active_extra_hwid_devices != int(local_active_sub.extra_hwid_devices or 0):
+                    await subscription_dal.update_subscription(
+                        session,
+                        local_active_sub.subscription_id,
+                        {"extra_hwid_devices": active_extra_hwid_devices},
+                    )
+                    local_active_sub.extra_hwid_devices = active_extra_hwid_devices
+            except Exception:
+                logging.exception(
+                    "Failed to load HWID entitlement summary for subscription %s",
+                    local_active_sub.subscription_id,
+                )
+            base_hwid_limit_for_payload = (
+                local_active_sub.hwid_device_limit
+                if local_active_sub.hwid_device_limit is not None
+                else self._base_hwid_limit_for_tariff(tariff)
+            )
+            expected_hwid_limit = self._effective_hwid_limit(
+                base_hwid_limit_for_payload,
+                active_extra_hwid_devices,
+            )
+            if expected_hwid_limit is not None:
+                hwid_limit = expected_hwid_limit
 
         return {
             "user_id": panel_user_data.get("uuid"),
@@ -820,9 +899,11 @@ class SubscriptionLifecycleMixin:
             "base_hwid_device_limit": local_active_sub.hwid_device_limit
             if local_active_sub
             else None,
-            "extra_hwid_devices": int(local_active_sub.extra_hwid_devices or 0)
-            if local_active_sub
-            else 0,
+            "extra_hwid_devices": active_extra_hwid_devices,
+            "extra_hwid_devices_valid_until": hwid_entitlement_summary.get("active_until"),
+            "extra_hwid_devices_next_valid_from": hwid_entitlement_summary.get(
+                "next_valid_from"
+            ),
             "user_bot_username": db_user.username,
             "is_panel_data": True,
             "max_devices": hwid_limit,

backend/bot/services/subscription_service_impl/payments.py

@@ -26,6 +26,11 @@ class PaymentContextMixin:
         tariff_key: Optional[str],
         purchased_gb: Optional[float] = None,
         purchased_hwid_devices: Optional[int] = None,
+        hwid_valid_from: Optional[datetime] = None,
+        hwid_valid_until: Optional[datetime] = None,
+        hwid_pricing_period_months: Optional[int] = None,
+        hwid_proration_ratio: Optional[float] = None,
+        hwid_full_price: Optional[float] = None,
     ) -> None:
         payment = await payment_dal.get_payment_by_db_id(session, payment_db_id)
         if not payment:
@@ -34,6 +39,16 @@ class PaymentContextMixin:
         payment.tariff_key = tariff_key
         payment.purchased_gb = purchased_gb
         payment.purchased_hwid_devices = purchased_hwid_devices
+        if hwid_valid_from is not None:
+            payment.hwid_valid_from = hwid_valid_from
+        if hwid_valid_until is not None:
+            payment.hwid_valid_until = hwid_valid_until
+        if hwid_pricing_period_months is not None:
+            payment.hwid_pricing_period_months = hwid_pricing_period_months
+        if hwid_proration_ratio is not None:
+            payment.hwid_proration_ratio = hwid_proration_ratio
+        if hwid_full_price is not None:
+            payment.hwid_full_price = hwid_full_price
         await session.flush()
 
     async def get_user_language(self, session: AsyncSession, user_id: int) -> str:

backend/bot/services/subscription_service_impl/tariffs.py

@@ -370,3 +370,91 @@ class TariffMixin:
             }
 
         return {"mode": "traffic_to_period", "remaining_days": remaining_days}
+
+    @staticmethod
+    def _aware_utc(value: Optional[datetime]) -> Optional[datetime]:
+        if value is None:
+            return None
+        if value.tzinfo is None:
+            return value.replace(tzinfo=timezone.utc)
+        return value
+
+    async def _hwid_conversion_credit(
+        self,
+        session: AsyncSession,
+        sub: Subscription,
+        *,
+        at: datetime,
+    ) -> Dict[str, Any]:
+        entries = await tariff_dal.get_hwid_device_value_entries(
+            session,
+            subscription_id=sub.subscription_id,
+            at=at,
+        )
+        value_rub = 0.0
+        purchase_ids: List[int] = []
+        skipped_devices = 0
+        for entry in entries:
+            currency = str(entry.get("currency") or "").upper()
+            if currency in {"XTR", "STARS", "STAR"}:
+                skipped_devices += int(entry.get("purchased_devices") or 0)
+                continue
+            amount = float(entry.get("amount") or 0)
+            if amount <= 0:
+                continue
+            valid_from = (
+                self._aware_utc(entry.get("valid_from"))
+                or self._aware_utc(entry.get("created_at"))
+                or at
+            )
+            valid_until = self._aware_utc(entry.get("valid_until"))
+            if not valid_until or valid_until <= at or valid_from >= valid_until:
+                continue
+            total_seconds = max(1.0, (valid_until - valid_from).total_seconds())
+            remaining_start = max(at, valid_from)
+            remaining_seconds = max(0.0, (valid_until - remaining_start).total_seconds())
+            if remaining_seconds <= 0:
+                continue
+            value_rub += amount * (remaining_seconds / total_seconds)
+            purchase_ids.append(int(entry["purchase_id"]))
+        return {
+            "value_rub": value_rub,
+            "purchase_ids": purchase_ids,
+            "skipped_devices": skipped_devices,
+        }
+
+    async def calculate_tariff_switch_options_with_hwid(
+        self,
+        session: AsyncSession,
+        sub: Subscription,
+        target_tariff: Tariff,
+    ) -> Dict[str, Any]:
+        options = dict(self.calculate_tariff_switch_options(sub, target_tariff))
+        now = datetime.now(timezone.utc)
+        credit = await self._hwid_conversion_credit(session, sub, at=now)
+        value_rub = float(credit.get("value_rub") or 0)
+        options["converted_hwid_value_rub"] = round(value_rub, 2)
+        options["convertible_hwid_purchase_ids"] = list(credit.get("purchase_ids") or [])
+        options["nonconverted_hwid_devices"] = int(credit.get("skipped_devices") or 0)
+        if value_rub <= 0:
+            return options
+
+        if options.get("mode") == "period_to_period":
+            target_monthly = float(options.get("target_monthly_rub") or 0)
+            hwid_days = (
+                math.floor((value_rub / target_monthly) * 30) if target_monthly > 0 else 0
+            )
+            options["converted_hwid_days"] = max(0, hwid_days)
+            options["recalc_days"] = int(options.get("recalc_days") or 0) + max(0, hwid_days)
+            options["paid_diff_rub"] = max(
+                0,
+                math.ceil(float(options.get("paid_diff_rub") or 0) - value_rub),
+            )
+            return options
+
+        if options.get("mode") == "period_to_traffic":
+            rub_per_gb = float(options.get("rub_per_gb") or 0)
+            hwid_gb = math.floor(value_rub / rub_per_gb) if rub_per_gb > 0 else 0
+            options["converted_hwid_gb"] = max(0, hwid_gb)
+            options["converted_gb"] = int(options.get("converted_gb") or 0) + max(0, hwid_gb)
+        return options

backend/bot/services/subscription_service_impl/traffic.py

@@ -53,7 +53,11 @@ class TrafficMixin:
             current_used = active_sub.traffic_used_bytes
 
         purchase_bytes = self.gb_to_bytes(traffic_gb)
-        extra_hwid_devices = int(getattr(active_sub, "extra_hwid_devices", 0) or 0)
+        extra_hwid_devices = (
+            await self._active_hwid_extra_devices_for_sub(session, active_sub)
+            if active_sub
+            else 0
+        )
         base_hwid_limit = self._base_hwid_limit_for_tariff(tariff)
         effective_hwid_limit = self._effective_hwid_limit(base_hwid_limit, extra_hwid_devices)
         remaining_bytes = max(0, int(current_limit or 0) - int(current_used or 0))
@@ -222,10 +226,8 @@ class TrafficMixin:
             if sub.hwid_device_limit is not None
             else self._base_hwid_limit_for_tariff(tariff)
         )
-        effective_hwid_limit = self._effective_hwid_limit(
-            base_hwid_limit,
-            int(sub.extra_hwid_devices or 0),
-        )
+        extra_hwid_devices = await self._active_hwid_extra_devices_for_sub(session, sub)
+        effective_hwid_limit = self._effective_hwid_limit(base_hwid_limit, extra_hwid_devices)
         updated_sub = await subscription_dal.update_subscription(
             session,
             sub.subscription_id,
@@ -235,6 +237,7 @@ class TrafficMixin:
                 "is_throttled": False,
                 "tariff_key": tariff.key,
                 "hwid_device_limit": base_hwid_limit,
+                "extra_hwid_devices": extra_hwid_devices,
             },
         )
         panel_payload = self._build_panel_update_payload(
@@ -499,10 +502,8 @@ class TrafficMixin:
             if sub.hwid_device_limit is not None
             else self._base_hwid_limit_for_tariff(tariff)
         )
-        effective_hwid_limit = self._effective_hwid_limit(
-            base_hwid_limit,
-            int(sub.extra_hwid_devices or 0),
-        )
+        extra_hwid_devices = await self._active_hwid_extra_devices_for_sub(session, sub)
+        effective_hwid_limit = self._effective_hwid_limit(base_hwid_limit, extra_hwid_devices)
         updated_sub = await subscription_dal.update_subscription(
             session,
             sub.subscription_id,
@@ -511,6 +512,7 @@ class TrafficMixin:
                 "traffic_limit_bytes": new_limit,
                 "is_throttled": False,
                 "hwid_device_limit": base_hwid_limit,
+                "extra_hwid_devices": extra_hwid_devices,
             },
         )
         panel_payload = self._build_panel_update_payload(
@@ -580,10 +582,9 @@ class TrafficMixin:
             if sub.hwid_device_limit is not None
             else self._base_hwid_limit_for_tariff(tariff)
         )
-        effective_hwid_limit = self._effective_hwid_limit(
-            base_hwid_limit,
-            int(sub.extra_hwid_devices or 0),
-        )
+        extra_hwid_devices = await self._active_hwid_extra_devices_for_sub(session, sub)
+        sub.extra_hwid_devices = extra_hwid_devices
+        effective_hwid_limit = self._effective_hwid_limit(base_hwid_limit, extra_hwid_devices)
         panel_payload = self._build_panel_update_payload(
             panel_user_uuid=db_user.panel_user_uuid,
             expire_at=sub.end_date,

backend/bot/services/tariff_worker.py

@@ -215,6 +215,7 @@ class TariffTrafficWorker:
 
                 if tariff.billing_model == "period":
                     await self._ensure_period_reset_strategy(sub, tariff, limit, panel_strategy)
+                await self._sync_hwid_device_limit(session, sub, tariff, panel_data)
                 await self._maybe_warn_or_throttle(
                     session,
                     sub,
@@ -377,6 +378,64 @@ class TariffTrafficWorker:
             sub.panel_user_uuid, payload, log_response=False
         )
 
+    async def _sync_hwid_device_limit(
+        self,
+        session: AsyncSession,
+        sub: Subscription,
+        tariff,
+        panel_data: dict,
+    ) -> None:
+        base_hwid_limit = (
+            int(sub.hwid_device_limit)
+            if sub.hwid_device_limit is not None
+            else self.subscription_service._base_hwid_limit_for_tariff(tariff)
+        )
+        active_extra = await tariff_dal.sum_active_hwid_devices(
+            session,
+            subscription_id=sub.subscription_id,
+            at=datetime.now(timezone.utc),
+        )
+        update_data = {}
+        if sub.hwid_device_limit != base_hwid_limit:
+            update_data["hwid_device_limit"] = base_hwid_limit
+        if int(sub.extra_hwid_devices or 0) != active_extra:
+            update_data["extra_hwid_devices"] = active_extra
+        if update_data:
+            for key, value in update_data.items():
+                setattr(sub, key, value)
+
+        effective_limit = self.subscription_service._effective_hwid_limit(
+            base_hwid_limit,
+            active_extra,
+        )
+        if effective_limit is None:
+            return
+        try:
+            panel_limit = panel_data.get("hwidDeviceLimit")
+            panel_limit_int = int(panel_limit) if panel_limit is not None else None
+        except (TypeError, ValueError):
+            panel_limit_int = None
+        if panel_limit_int == effective_limit:
+            return
+
+        payload = self.subscription_service._build_panel_update_payload(
+            panel_user_uuid=sub.panel_user_uuid,
+            expire_at=sub.end_date,
+            hwid_device_limit=effective_limit,
+            include_default_squads=False,
+        )
+        updated_panel = await self.panel_service.update_user_details_on_panel(
+            sub.panel_user_uuid,
+            payload,
+            log_response=False,
+        )
+        if not updated_panel or updated_panel.get("error"):
+            logging.warning(
+                "TariffTrafficWorker: failed to sync HWID limit for subscription %s: %s",
+                sub.subscription_id,
+                updated_panel,
+            )
+
     async def _maybe_warn_or_throttle(
         self,
         session: AsyncSession,