feat: integrate Lava Business payment provider

- Lava Business via gate.lava.ru (HMAC-SHA256 signed JSON requests)
- Sub-methods: card and SBP via includeService filter
- Webhook signature verified from raw bytes with secret_key_2
- Sticky terminal-status guard (success after amount_mismatch escalates to ERROR)
- Order ID with full uuid4 hex (128-bit entropy)
- Cross-row contamination guard: order_id assertion on invoice_id fallback
- Warning when hook URL cannot be derived from webhook/web_api/cabinet bases
- Explicit failure when Lava response lacks payment_url (no orphan rows)
- Adds LAVA settings category, /lava-webhook endpoint, cabinet topup branch
- Mirrors existing Antilopay/Jupiter/Donut mixin pattern

app/cabinet/routes/balance.py

@@ -976,6 +976,37 @@ async def create_topup(
                     detail='Failed to create Donut payment',
                 )
 
+        elif request.payment_method == 'lava':
+            if not settings.is_lava_enabled():
+                raise HTTPException(
+                    status_code=status.HTTP_400_BAD_REQUEST,
+                    detail='Lava payment method is unavailable',
+                )
+
+            payment_service = PaymentService()
+            payment_method_type = request.payment_option or None
+            result = await payment_service.create_lava_payment(
+                db=db,
+                user_id=user.id,
+                amount_kopeks=request.amount_kopeks,
+                description=settings.get_balance_payment_description(
+                    request.amount_kopeks, telegram_user_id=user.telegram_id, user_db_id=user.id
+                ),
+                email=getattr(user, 'email', None),
+                language=getattr(user, 'language', None) or settings.DEFAULT_LANGUAGE,
+                payment_method_type=payment_method_type,
+                return_url=cabinet_success_url,
+            )
+
+            if result and result.get('payment_url'):
+                payment_url = result.get('payment_url')
+                payment_id = str(result.get('local_payment_id') or result.get('order_id') or 'pending')
+            else:
+                raise HTTPException(
+                    status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
+                    detail='Failed to create Lava payment',
+                )
+
         else:
             # For other payment methods, redirect to bot
             raise HTTPException(
@@ -1151,6 +1182,21 @@ def _get_status_info(record: PendingPayment) -> tuple[str, str]:
         }
         return mapping.get(status, ('❓', 'Неизвестно'))
 
+    if record.method == PaymentMethod.LAVA:
+        mapping = {
+            'pending': ('⏳', 'Ожидает оплаты'),
+            'created': ('⏳', 'Создано'),
+            'processing': ('⌛', 'Обрабатывается'),
+            'success': ('✅', 'Оплачено'),
+            'cancel': ('❌', 'Отменено'),
+            'cancelled': ('❌', 'Отменено'),
+            'expired': ('⌛', 'Истёк'),
+            'failed': ('❌', 'Ошибка'),
+            'error': ('❌', 'Ошибка'),
+            'amount_mismatch': ('⚠️', 'Несовпадение суммы'),
+        }
+        return mapping.get(status, ('❓', 'Неизвестно'))
+
     return '❓', 'Неизвестно'
 
 

app/config.py

@@ -753,6 +753,25 @@ class Settings(BaseSettings):
     DONUT_SBP_QR_ENABLED: bool = False
     DONUT_SBP_QR_DISPLAY_NAME: str = 'СБП QR (Donut)'
 
+    # Lava (Lava Business API, gate.lava.ru)
+    LAVA_ENABLED: bool = False
+    LAVA_BASE_URL: str = 'https://gate.lava.ru'
+    LAVA_SHOP_ID: str | None = None  # UUID проекта
+    LAVA_SECRET_KEY: str | None = None  # secret_key — для подписи запросов
+    LAVA_WEBHOOK_SECRET: str | None = None  # secret_key_2 — для проверки подписи webhook
+    LAVA_DISPLAY_NAME: str = 'Lava'
+    LAVA_CURRENCY: str = 'RUB'
+    LAVA_MIN_AMOUNT_KOPEKS: int = 10000  # 100₽
+    LAVA_MAX_AMOUNT_KOPEKS: int = 10000000  # 100 000₽
+    LAVA_WEBHOOK_PATH: str = '/lava-webhook'
+    LAVA_RETURN_URL: str | None = None
+    LAVA_PAYMENT_LIFETIME_MINUTES: int = 60  # макс 7200 минут (5 дней)
+    # Sub-методы Lava (фильтр через includeService/excludeService на стороне Lava)
+    LAVA_CARD_ENABLED: bool = False
+    LAVA_CARD_DISPLAY_NAME: str = 'Карта (Lava)'
+    LAVA_SBP_ENABLED: bool = False
+    LAVA_SBP_DISPLAY_NAME: str = 'СБП (Lava)'
+
     # Etoplatezhi (paymentpage.etoplatezhi.ru)
     ETOPLATEZHI_ENABLED: bool = False
     ETOPLATEZHI_PROJECT_ID: int | None = None
@@ -2343,6 +2362,41 @@ class Settings(BaseSettings):
     def get_donut_sbp_qr_display_name_html(self) -> str:
         return html.escape(self.get_donut_sbp_qr_display_name())
 
+    def is_lava_enabled(self) -> bool:
+        return (
+            self.LAVA_ENABLED
+            and self.LAVA_SHOP_ID is not None
+            and self.LAVA_SECRET_KEY is not None
+            and self.LAVA_WEBHOOK_SECRET is not None
+        )
+
+    def get_lava_display_name(self) -> str:
+        name = (self.LAVA_DISPLAY_NAME or '').strip()
+        return name if name else 'Lava'
+
+    def get_lava_display_name_html(self) -> str:
+        return html.escape(self.get_lava_display_name())
+
+    def is_lava_card_enabled(self) -> bool:
+        return self.LAVA_CARD_ENABLED and self.is_lava_enabled()
+
+    def get_lava_card_display_name(self) -> str:
+        name = (self.LAVA_CARD_DISPLAY_NAME or '').strip()
+        return name or 'Карта (Lava)'
+
+    def get_lava_card_display_name_html(self) -> str:
+        return html.escape(self.get_lava_card_display_name())
+
+    def is_lava_sbp_enabled(self) -> bool:
+        return self.LAVA_SBP_ENABLED and self.is_lava_enabled()
+
+    def get_lava_sbp_display_name(self) -> str:
+        name = (self.LAVA_SBP_DISPLAY_NAME or '').strip()
+        return name or 'СБП (Lava)'
+
+    def get_lava_sbp_display_name_html(self) -> str:
+        return html.escape(self.get_lava_sbp_display_name())
+
     def is_etoplatezhi_enabled(self) -> bool:
         return (
             self.ETOPLATEZHI_ENABLED

app/database/crud/lava.py

@@ -0,0 +1,157 @@
+"""CRUD операции для платежей Lava (Lava Business)."""
+
+from datetime import UTC, datetime
+
+import structlog
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.database.models import LavaPayment
+
+
+logger = structlog.get_logger(__name__)
+
+
+async def create_lava_payment(
+    db: AsyncSession,
+    *,
+    user_id: int | None,
+    order_id: str,
+    amount_kopeks: int,
+    currency: str = 'RUB',
+    description: str | None = None,
+    payment_url: str | None = None,
+    payment_method: str | None = None,
+    lava_invoice_id: str | None = None,
+    expires_at: datetime | None = None,
+    metadata_json: dict | None = None,
+) -> LavaPayment:
+    """Создаёт запись о платеже Lava."""
+    payment = LavaPayment(
+        user_id=user_id,
+        order_id=order_id,
+        amount_kopeks=amount_kopeks,
+        currency=currency,
+        description=description,
+        payment_url=payment_url,
+        payment_method=payment_method,
+        lava_invoice_id=lava_invoice_id,
+        expires_at=expires_at,
+        metadata_json=metadata_json,
+        status='pending',
+        is_paid=False,
+    )
+    db.add(payment)
+    await db.commit()
+    await db.refresh(payment)
+    logger.info('Создан платеж Lava', order_id=order_id, user_id=user_id)
+    return payment
+
+
+async def get_lava_payment_by_order_id(db: AsyncSession, order_id: str) -> LavaPayment | None:
+    """Получает платёж по нашему orderId."""
+    result = await db.execute(select(LavaPayment).where(LavaPayment.order_id == order_id))
+    return result.scalar_one_or_none()
+
+
+async def get_lava_payment_by_invoice_id(db: AsyncSession, lava_invoice_id: str) -> LavaPayment | None:
+    """Получает платёж по invoice_id, выданному Lava."""
+    result = await db.execute(
+        select(LavaPayment).where(LavaPayment.lava_invoice_id == lava_invoice_id)
+    )
+    return result.scalar_one_or_none()
+
+
+async def get_lava_payment_by_id(db: AsyncSession, payment_id: int) -> LavaPayment | None:
+    """Получает платёж по локальному ID."""
+    result = await db.execute(select(LavaPayment).where(LavaPayment.id == payment_id))
+    return result.scalar_one_or_none()
+
+
+async def get_lava_payment_by_id_for_update(db: AsyncSession, payment_id: int) -> LavaPayment | None:
+    """Получает платёж с FOR UPDATE-блокировкой."""
+    result = await db.execute(
+        select(LavaPayment)
+        .where(LavaPayment.id == payment_id)
+        .with_for_update()
+        .execution_options(populate_existing=True)
+    )
+    return result.scalar_one_or_none()
+
+
+async def update_lava_payment_status(
+    db: AsyncSession,
+    payment: LavaPayment,
+    *,
+    status: str,
+    is_paid: bool | None = None,
+    lava_invoice_id: str | None = None,
+    payment_method: str | None = None,
+    callback_payload: dict | None = None,
+    transaction_id: int | None = None,
+) -> LavaPayment:
+    """Обновляет статус платежа."""
+    payment.status = status
+    payment.updated_at = datetime.now(UTC)
+
+    if is_paid is not None:
+        payment.is_paid = is_paid
+        if is_paid:
+            payment.paid_at = datetime.now(UTC)
+    if lava_invoice_id is not None:
+        payment.lava_invoice_id = lava_invoice_id
+    if payment_method is not None:
+        payment.payment_method = payment_method
+    if callback_payload is not None:
+        payment.callback_payload = callback_payload
+    if transaction_id is not None:
+        payment.transaction_id = transaction_id
+
+    await db.commit()
+    await db.refresh(payment)
+    logger.info(
+        'Обновлён статус платежа Lava',
+        order_id=payment.order_id,
+        status=status,
+        is_paid=payment.is_paid,
+    )
+    return payment
+
+
+async def get_pending_lava_payments(db: AsyncSession, user_id: int) -> list[LavaPayment]:
+    """Возвращает незавершённые платежи пользователя."""
+    result = await db.execute(
+        select(LavaPayment).where(
+            LavaPayment.user_id == user_id,
+            LavaPayment.status == 'pending',
+            LavaPayment.is_paid == False,
+        )
+    )
+    return list(result.scalars().all())
+
+
+async def get_expired_pending_lava_payments(db: AsyncSession) -> list[LavaPayment]:
+    """Возвращает просроченные платежи в статусе pending."""
+    now = datetime.now(UTC)
+    result = await db.execute(
+        select(LavaPayment).where(
+            LavaPayment.status == 'pending',
+            LavaPayment.is_paid == False,
+            LavaPayment.expires_at < now,
+        )
+    )
+    return list(result.scalars().all())
+
+
+async def link_lava_payment_to_transaction(
+    db: AsyncSession,
+    *,
+    payment: LavaPayment,
+    transaction_id: int,
+) -> LavaPayment:
+    """Связывает платёж с транзакцией."""
+    payment.transaction_id = transaction_id
+    payment.updated_at = datetime.now(UTC)
+    await db.flush()
+    await db.refresh(payment)
+    return payment

app/database/models.py

@@ -171,6 +171,7 @@ class PaymentMethod(Enum):
     ANTILOPAY = 'antilopay'
     JUPITER = 'jupiter'
     DONUT = 'donut'
+    LAVA = 'lava'
     MANUAL = 'manual'
     BALANCE = 'balance'
 
@@ -1418,6 +1419,68 @@ class DonutPayment(Base):
         return f'<DonutPayment(id={self.id}, order_id={self.order_id}, amount={self.amount_rubles}₽, status={self.status})>'
 
 
+class LavaPayment(Base):
+    """Платежи через Lava Business (gate.lava.ru)."""
+
+    __tablename__ = 'lava_payments'
+
+    id = Column(Integer, primary_key=True, index=True)
+    user_id = Column(Integer, ForeignKey('users.id', ondelete='SET NULL'), nullable=True, index=True)
+
+    # Идентификаторы
+    order_id = Column(String(64), unique=True, nullable=False, index=True)  # Наш orderId
+    lava_invoice_id = Column(String(128), unique=True, nullable=True, index=True)  # invoice_id (UUID) от Lava
+
+    # Суммы
+    amount_kopeks = Column(Integer, nullable=False)
+    currency = Column(String(10), nullable=False, default='RUB')
+    description = Column(Text, nullable=True)
+
+    # Статусы
+    status = Column(String(32), nullable=False, default='pending')
+    is_paid = Column(Boolean, default=False)
+
+    # Данные платежа
+    payment_url = Column(Text, nullable=True)
+    payment_method = Column(String(32), nullable=True)  # 'card', 'sbp' и т.д.
+
+    # Метаданные
+    metadata_json = Column(JSON, nullable=True)
+    callback_payload = Column(JSON, nullable=True)
+
+    # Временные метки
+    paid_at = Column(AwareDateTime(), nullable=True)
+    expires_at = Column(AwareDateTime(), nullable=True)
+    created_at = Column(AwareDateTime(), default=func.now())
+    updated_at = Column(AwareDateTime(), default=func.now(), onupdate=func.now())
+
+    # Связь с транзакцией
+    transaction_id = Column(Integer, ForeignKey('transactions.id'), nullable=True)
+
+    # Relationships
+    user = relationship('User', backref='lava_payments')
+    transaction = relationship('Transaction', backref='lava_payment')
+
+    @property
+    def amount_rubles(self) -> float:
+        return self.amount_kopeks / 100
+
+    @property
+    def is_pending(self) -> bool:
+        return self.status in ('pending', 'created', 'processing')
+
+    @property
+    def is_success(self) -> bool:
+        return self.status == 'success' and self.is_paid
+
+    @property
+    def is_failed(self) -> bool:
+        return self.status in ['failed', 'expired', 'cancel', 'cancelled', 'amount_mismatch', 'error']
+
+    def __repr__(self) -> str:  # pragma: no cover - debug helper
+        return f'<LavaPayment(id={self.id}, order_id={self.order_id}, amount={self.amount_rubles}₽, status={self.status})>'
+
+
 class PromoGroup(Base):
     __tablename__ = 'promo_groups'
 

app/handlers/balance/lava.py

@@ -0,0 +1,284 @@
+"""Handler for Lava balance top-up (Lava Business, gate.lava.ru)."""
+
+import html
+
+import structlog
+from aiogram import types
+from aiogram.fsm.context import FSMContext
+from aiogram.types import InlineKeyboardButton, InlineKeyboardMarkup
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.config import settings
+from app.database.models import User
+from app.keyboards.inline import get_back_keyboard
+from app.localization.texts import get_texts
+from app.services.payment_service import PaymentService
+from app.states import BalanceStates
+from app.utils.decorators import error_handler
+
+
+logger = structlog.get_logger(__name__)
+
+
+LAVA_PAYMENT_METHODS = {'lava', 'lava_card', 'lava_sbp'}
+
+LAVA_SERVICE_MAP: dict[str, str | None] = {
+    'lava': None,
+    'lava_card': 'card',
+    'lava_sbp': 'sbp',
+}
+
+
+def _extract_service_type(payment_method: str) -> str | None:
+    return LAVA_SERVICE_MAP.get(payment_method)
+
+
+def _check_topup_restriction(db_user: User, texts) -> InlineKeyboardMarkup | None:
+    """Проверяет ограничение на пополнение."""
+    if not getattr(db_user, 'restriction_topup', False):
+        return None
+
+    keyboard = []
+    support_url = settings.get_support_contact_url()
+    if support_url:
+        keyboard.append([InlineKeyboardButton(text='\U0001f198 Обжаловать', url=support_url)])
+    keyboard.append([InlineKeyboardButton(text=texts.BACK, callback_data='menu_balance')])
+    return InlineKeyboardMarkup(inline_keyboard=keyboard)
+
+
+def _get_display_name(payment_method: str) -> str:
+    if payment_method == 'lava_card':
+        return settings.get_lava_card_display_name()
+    if payment_method == 'lava_sbp':
+        return settings.get_lava_sbp_display_name()
+    return settings.get_lava_display_name()
+
+
+async def _create_lava_payment_and_respond(
+    message_or_callback,
+    db_user: User,
+    db: AsyncSession,
+    amount_kopeks: int,
+    edit_message: bool = False,
+    payment_method_type: str | None = None,
+    display_name: str | None = None,
+):
+    """Создаёт инвойс Lava и отправляет ссылку пользователю."""
+    texts = get_texts(db_user.language)
+    amount_rub = amount_kopeks / 100
+
+    payment_service = PaymentService()
+    description = settings.PAYMENT_BALANCE_TEMPLATE.format(
+        service_name=settings.PAYMENT_SERVICE_NAME,
+        description='Пополнение баланса',
+    )
+
+    result = await payment_service.create_lava_payment(
+        db=db,
+        user_id=db_user.id,
+        amount_kopeks=amount_kopeks,
+        description=description,
+        email=getattr(db_user, 'email', None),
+        language=db_user.language,
+        payment_method_type=payment_method_type,
+    )
+
+    if not result:
+        error_text = texts.t(
+            'PAYMENT_CREATE_ERROR',
+            'Не удалось создать платёж. Попробуйте позже.',
+        )
+        if edit_message:
+            await message_or_callback.edit_text(
+                error_text,
+                reply_markup=get_back_keyboard(db_user.language),
+                parse_mode='HTML',
+            )
+        else:
+            await message_or_callback.answer(error_text, parse_mode='HTML')
+        return
+
+    payment_url = result.get('payment_url')
+    name = display_name or settings.get_lava_display_name()
+
+    # Без URL mixin вернул бы None ещё до этого блока; здесь URL гарантирован.
+    pay_button_text = texts.t('PAY_BUTTON', '\U0001f4b3 Оплатить {amount}₽').format(
+        amount=f'{amount_rub:.0f}',
+    )
+
+    keyboard = InlineKeyboardMarkup(
+        inline_keyboard=[
+            [InlineKeyboardButton(text=pay_button_text, url=payment_url)],
+            [
+                InlineKeyboardButton(
+                    text=texts.t('BACK_BUTTON', '◀️ Назад'),
+                    callback_data='menu_balance',
+                )
+            ],
+        ]
+    )
+
+    response_text = texts.t(
+        'LAVA_PAYMENT_CREATED',
+        '\U0001f4b3 <b>Оплата через {name}</b>\n\n'
+        'Сумма: <b>{amount}₽</b>\n\n'
+        'Нажмите кнопку ниже для перехода к оплате.\n'
+        'После подтверждения платежа баланс будет пополнен автоматически.',
+    ).format(name=name, amount=f'{amount_rub:.2f}')
+
+    if edit_message:
+        await message_or_callback.edit_text(response_text, reply_markup=keyboard, parse_mode='HTML')
+    else:
+        await message_or_callback.answer(response_text, reply_markup=keyboard, parse_mode='HTML')
+
+    logger.info('Lava payment created', telegram_id=db_user.telegram_id, amount_rub=amount_rub)
+
+
+@error_handler
+async def process_lava_payment_amount(
+    message: types.Message,
+    db_user: User,
+    db: AsyncSession,
+    amount_kopeks: int,
+    state: FSMContext,
+):
+    """Обрабатывает сумму для Lava."""
+    texts = get_texts(db_user.language)
+
+    restriction_kb = _check_topup_restriction(db_user, texts)
+    if restriction_kb:
+        reason = html.escape(getattr(db_user, 'restriction_reason', None) or 'Действие ограничено администратором')
+        await message.answer(
+            f'\U0001f6ab <b>Пополнение ограничено</b>\n\n{reason}',
+            parse_mode='HTML',
+            reply_markup=restriction_kb,
+        )
+        await state.clear()
+        return
+
+    min_amount = settings.LAVA_MIN_AMOUNT_KOPEKS
+    max_amount = settings.LAVA_MAX_AMOUNT_KOPEKS
+
+    if amount_kopeks < min_amount:
+        await message.answer(
+            texts.t(
+                'PAYMENT_AMOUNT_TOO_LOW',
+                'Минимальная сумма пополнения: {min_amount}₽',
+            ).format(min_amount=min_amount // 100),
+            reply_markup=get_back_keyboard(db_user.language),
+            parse_mode='HTML',
+        )
+        return
+
+    if amount_kopeks > max_amount:
+        await message.answer(
+            texts.t(
+                'PAYMENT_AMOUNT_TOO_HIGH',
+                'Максимальная сумма пополнения: {max_amount}₽',
+            ).format(max_amount=max_amount // 100),
+            reply_markup=get_back_keyboard(db_user.language),
+            parse_mode='HTML',
+        )
+        return
+
+    data = await state.get_data()
+    payment_method = data.get('payment_method', 'lava')
+    payment_method_type = _extract_service_type(payment_method)
+    display_name = _get_display_name(payment_method)
+
+    await state.clear()
+
+    await _create_lava_payment_and_respond(
+        message_or_callback=message,
+        db_user=db_user,
+        db=db,
+        amount_kopeks=amount_kopeks,
+        edit_message=False,
+        payment_method_type=payment_method_type,
+        display_name=display_name,
+    )
+
+
+async def _start_lava_topup_impl(
+    callback: types.CallbackQuery,
+    db_user: User,
+    state: FSMContext,
+    payment_method: str,
+):
+    """Стартует FSM ввода суммы для Lava."""
+    texts = get_texts(db_user.language)
+
+    restriction_kb = _check_topup_restriction(db_user, texts)
+    if restriction_kb:
+        reason = html.escape(getattr(db_user, 'restriction_reason', None) or 'Действие ограничено администратором')
+        await callback.message.edit_text(
+            f'\U0001f6ab <b>Пополнение ограничено</b>\n\n{reason}',
+            parse_mode='HTML',
+            reply_markup=restriction_kb,
+        )
+        return
+
+    await state.set_state(BalanceStates.waiting_for_amount)
+    await state.update_data(payment_method=payment_method)
+
+    min_amount = settings.LAVA_MIN_AMOUNT_KOPEKS // 100
+    max_amount = settings.LAVA_MAX_AMOUNT_KOPEKS // 100
+
+    display_name = _get_display_name(payment_method)
+
+    keyboard = InlineKeyboardMarkup(
+        inline_keyboard=[
+            [
+                InlineKeyboardButton(
+                    text=texts.t('BACK_BUTTON', '◀️ Назад'),
+                    callback_data='menu_balance',
+                )
+            ]
+        ]
+    )
+
+    await callback.message.edit_text(
+        texts.t(
+            'LAVA_ENTER_AMOUNT',
+            '\U0001f4b3 <b>Пополнение через {name}</b>\n\n'
+            'Введите сумму пополнения в рублях.\n\n'
+            'Минимум: {min_amount}₽\n'
+            'Максимум: {max_amount}₽',
+        ).format(
+            name=display_name,
+            min_amount=min_amount,
+            max_amount=f'{max_amount:,}'.replace(',', ' '),
+        ),
+        parse_mode='HTML',
+        reply_markup=keyboard,
+    )
+
+
+@error_handler
+async def start_lava_topup(
+    callback: types.CallbackQuery,
+    db_user: User,
+    db: AsyncSession,
+    state: FSMContext,
+):
+    await _start_lava_topup_impl(callback, db_user, state, 'lava')
+
+
+@error_handler
+async def start_lava_card_topup(
+    callback: types.CallbackQuery,
+    db_user: User,
+    db: AsyncSession,
+    state: FSMContext,
+):
+    await _start_lava_topup_impl(callback, db_user, state, 'lava_card')
+
+
+@error_handler
+async def start_lava_sbp_topup(
+    callback: types.CallbackQuery,
+    db_user: User,
+    db: AsyncSession,
+    state: FSMContext,
+):
+    await _start_lava_topup_impl(callback, db_user, state, 'lava_sbp')

app/handlers/balance/main.py

@@ -205,6 +205,13 @@ async def route_payment_by_method(
             await process_donut_payment_amount(message, db_user, db, amount_kopeks, state)
         return True
 
+    if payment_method in ('lava', 'lava_card', 'lava_sbp'):
+        from .lava import process_lava_payment_amount
+
+        async with AsyncSessionLocal() as db:
+            await process_lava_payment_amount(message, db_user, db, amount_kopeks, state)
+        return True
+
     if payment_method == 'riopay':
         from .riopay import process_riopay_payment_amount
 
@@ -837,6 +844,12 @@ def register_balance_handlers(dp: Dispatcher):
     dp.callback_query.register(start_donut_sbp_topup, F.data == 'topup_donut_sbp')
     dp.callback_query.register(start_donut_sbp_qr_topup, F.data == 'topup_donut_sbp_qr')
 
+    from .lava import start_lava_card_topup, start_lava_sbp_topup, start_lava_topup
+
+    dp.callback_query.register(start_lava_topup, F.data == 'topup_lava')
+    dp.callback_query.register(start_lava_card_topup, F.data == 'topup_lava_card')
+    dp.callback_query.register(start_lava_sbp_topup, F.data == 'topup_lava_sbp')
+
     from .mulenpay import check_mulenpay_payment_status
 
     dp.callback_query.register(check_mulenpay_payment_status, F.data.startswith('check_mulenpay_'))

app/keyboards/inline.py

@@ -2060,6 +2060,46 @@ def get_payment_methods_keyboard(amount_kopeks: int, language: str = DEFAULT_LAN
         )
         has_direct_payment_methods = True
 
+    if settings.is_lava_card_enabled():
+        lava_card_name = settings.get_lava_card_display_name()
+        keyboard.append(
+            [
+                InlineKeyboardButton(
+                    text=texts.t('PAYMENT_LAVA_CARD', f'💳 {lava_card_name}'),
+                    callback_data=_build_callback('lava_card'),
+                )
+            ]
+        )
+        has_direct_payment_methods = True
+
+    if settings.is_lava_sbp_enabled():
+        lava_sbp_name = settings.get_lava_sbp_display_name()
+        keyboard.append(
+            [
+                InlineKeyboardButton(
+                    text=texts.t('PAYMENT_LAVA_SBP', f'📱 {lava_sbp_name}'),
+                    callback_data=_build_callback('lava_sbp'),
+                )
+            ]
+        )
+        has_direct_payment_methods = True
+
+    if (
+        settings.is_lava_enabled()
+        and not settings.is_lava_card_enabled()
+        and not settings.is_lava_sbp_enabled()
+    ):
+        lava_name = settings.get_lava_display_name()
+        keyboard.append(
+            [
+                InlineKeyboardButton(
+                    text=texts.t('PAYMENT_LAVA', f'🌋 {lava_name}'),
+                    callback_data=_build_callback('lava'),
+                )
+            ]
+        )
+        has_direct_payment_methods = True
+
     if settings.is_support_topup_enabled():
         keyboard.append(
             [

app/services/lava_service.py

@@ -0,0 +1,234 @@
+"""Сервис для работы с API Lava Business (gate.lava.ru)."""
+
+import hashlib
+import hmac
+import json
+from typing import Any
+
+import aiohttp
+import structlog
+
+from app.config import settings
+
+
+logger = structlog.get_logger(__name__)
+
+
+class LavaAPIError(Exception):
+    """Ошибка API Lava."""
+
+    def __init__(self, status_code: int, message: str, code: str | int | None = None) -> None:
+        self.status_code = status_code
+        self.message = message
+        self.api_code = code
+        super().__init__(f'Lava API error ({status_code}): {message}')
+
+
+class LavaService:
+    """Клиент для Lava Business API (gate.lava.ru).
+
+    Подпись запросов: HMAC-SHA256(json_body, secret_key) → hex.
+    Передаётся в заголовке ``Signature``.
+    Ключи `secret_key` (запросы) и `secret_key_2` (webhook) выдаются мерчанту в личном кабинете.
+    Каноническая строка для подписи — JSON в том же порядке, в котором отправляется в теле.
+    """
+
+    def __init__(self) -> None:
+        self._session: aiohttp.ClientSession | None = None
+
+    @property
+    def base_url(self) -> str:
+        return (settings.LAVA_BASE_URL or 'https://gate.lava.ru').rstrip('/')
+
+    @property
+    def shop_id(self) -> str:
+        return settings.LAVA_SHOP_ID or ''
+
+    @property
+    def secret_key(self) -> str:
+        return settings.LAVA_SECRET_KEY or ''
+
+    @property
+    def webhook_secret(self) -> str:
+        # secret_key_2 — для проверки подписи webhook'а
+        return settings.LAVA_WEBHOOK_SECRET or ''
+
+    async def _get_session(self) -> aiohttp.ClientSession:
+        if self._session is None or self._session.closed:
+            self._session = aiohttp.ClientSession(
+                timeout=aiohttp.ClientTimeout(total=30),
+            )
+        return self._session
+
+    async def close(self) -> None:
+        if self._session and not self._session.closed:
+            await self._session.close()
+            self._session = None
+
+    @staticmethod
+    def _serialize(payload: dict[str, Any]) -> str:
+        """Сериализация JSON для подписи и тела запроса.
+
+        Lava подписывает байт-в-байт ту же строку, что и отправляется в теле, поэтому
+        порядок ключей определяется порядком вставки в payload (Python ≥3.7 dict сохраняет
+        порядок). Используем компактный сепаратор и UTF-8 без экранирования юникода.
+        """
+        return json.dumps(payload, separators=(',', ':'), ensure_ascii=False)
+
+    def _hmac_hex(self, message: str | bytes, key: str | None = None) -> str:
+        secret = (key if key is not None else self.secret_key) or ''
+        msg_bytes = message if isinstance(message, (bytes, bytearray)) else message.encode('utf-8')
+        return hmac.new(
+            secret.encode('utf-8'),
+            msg=msg_bytes,
+            digestmod=hashlib.sha256,
+        ).hexdigest()
+
+    def _build_headers(self, body: str) -> dict[str, str]:
+        return {
+            'Accept': 'application/json',
+            'Content-Type': 'application/json',
+            'Signature': self._hmac_hex(body),
+        }
+
+    async def _post(self, path: str, payload: dict[str, Any]) -> dict[str, Any]:
+        url = f'{self.base_url}/{path.lstrip("/")}'
+        body = self._serialize(payload)
+        try:
+            session = await self._get_session()
+            async with session.post(url, data=body, headers=self._build_headers(body)) as response:
+                try:
+                    data = await response.json(content_type=None)
+                except Exception:
+                    text = await response.text()
+                    data = {'_raw': text}
+                if not isinstance(data, dict):
+                    data = {'_raw': data}
+                if response.status >= 400:
+                    error_msg = (
+                        data.get('error')
+                        or (data.get('data') or {}).get('error')
+                        or data.get('message')
+                        or 'Lava API HTTP error'
+                    )
+                    logger.warning(
+                        'Lava API HTTP error',
+                        url=url,
+                        status=response.status,
+                        error_msg=str(error_msg),
+                        code=data.get('code'),
+                    )
+                    raise LavaAPIError(response.status, str(error_msg), data.get('code'))
+                return data
+        except aiohttp.ClientError as error:
+            logger.exception('Lava API connection error', url=url, error=error)
+            raise
+
+    async def create_invoice(
+        self,
+        *,
+        amount_rubles: float,
+        order_id: str,
+        success_url: str | None = None,
+        fail_url: str | None = None,
+        hook_url: str | None = None,
+        expire_minutes: int | None = None,
+        comment: str | None = None,
+        custom_fields: str | None = None,
+        include_service: list[str] | None = None,
+        exclude_service: list[str] | None = None,
+    ) -> dict[str, Any]:
+        """Создаёт инвойс через POST /api/v2/invoice/create.
+
+        Сумма передаётся в рублях с двумя знаками после запятой.
+        ``orderId`` — наш уникальный идентификатор платежа.
+        """
+        # Порядок полей важен (этим же порядком сериализуется и подписывается)
+        payload: dict[str, Any] = {
+            'sum': round(float(amount_rubles), 2),
+            'orderId': str(order_id),
+            'shopId': self.shop_id,
+        }
+        if hook_url:
+            payload['hookUrl'] = hook_url[:500]
+        if success_url:
+            payload['successUrl'] = success_url[:500]
+        if fail_url:
+            payload['failUrl'] = fail_url[:500]
+        if expire_minutes is not None:
+            # Lava лимит: 1..7200 минут (5 дней)
+            payload['expire'] = max(1, min(7200, int(expire_minutes)))
+        if comment:
+            payload['comment'] = comment[:255]
+        if custom_fields:
+            payload['customFields'] = custom_fields[:500]
+        if include_service:
+            payload['includeService'] = list(include_service)
+        if exclude_service:
+            payload['excludeService'] = list(exclude_service)
+
+        logger.info('Lava API invoice/create', order_id=order_id, sum=payload['sum'])
+        data = await self._post('/api/v2/invoice/create', payload)
+
+        # Lava возвращает {"status": "success", "data": {...}} или {"status": "error", "error": "..."}
+        if isinstance(data.get('status'), str) and data['status'].lower() == 'error':
+            raise LavaAPIError(200, str(data.get('error') or data.get('message') or 'unknown'))
+
+        return data
+
+    async def get_invoice_status(
+        self,
+        *,
+        order_id: str | None = None,
+        invoice_id: str | None = None,
+    ) -> dict[str, Any]:
+        """POST /api/v2/invoice/status — статус инвойса по orderId или invoiceId."""
+        if not order_id and not invoice_id:
+            raise ValueError('Lava status: order_id or invoice_id required')
+
+        payload: dict[str, Any] = {'shopId': self.shop_id}
+        if invoice_id:
+            payload['invoiceId'] = str(invoice_id)
+        if order_id:
+            payload['orderId'] = str(order_id)
+
+        logger.info('Lava API invoice/status', order_id=order_id, invoice_id=invoice_id)
+        return await self._post('/api/v2/invoice/status', payload)
+
+    async def get_services(self) -> dict[str, Any]:
+        """POST /api/v2/invoice/services — доступные методы оплаты для shopId."""
+        payload: dict[str, Any] = {'shopId': self.shop_id}
+        return await self._post('/api/v2/invoice/services', payload)
+
+    def verify_webhook_signature(self, raw_body: bytes, received_signature: str) -> bool:
+        """Верификация подписи webhook (заголовок ``Authorization``).
+
+        Lava Business webhook подписан HMAC-SHA256 от raw JSON body ключом ``secret_key_2``.
+        """
+        try:
+            if not received_signature:
+                logger.warning('Lava webhook: отсутствует Authorization header')
+                return False
+            if not self.webhook_secret:
+                logger.error('Lava webhook: LAVA_WEBHOOK_SECRET не настроен')
+                return False
+
+            # HMAC берётся напрямую от raw bytes — без decode/encode round-trip,
+            # чтобы не терять байты при некорректной кодировке payload.
+            expected = self._hmac_hex(raw_body, key=self.webhook_secret)
+            received = received_signature.strip()
+
+            if not hmac.compare_digest(expected.lower(), received.lower()):
+                logger.warning(
+                    'Lava webhook: invalid signature',
+                    received_prefix=received[:8],
+                )
+                return False
+            return True
+        except Exception as error:
+            logger.error('Lava webhook verify error', error=error)
+            return False
+
+
+# Singleton instance
+lava_service = LavaService()

app/services/payment/lava.py

@@ -0,0 +1,594 @@
+"""Mixin для интеграции с Lava Business (gate.lava.ru)."""
+
+from __future__ import annotations
+
+import uuid
+from datetime import UTC, datetime, timedelta
+from importlib import import_module
+from typing import Any
+
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.config import settings
+from app.database.models import PaymentMethod, TransactionType
+from app.services.lava_service import lava_service
+from app.utils.payment_logger import payment_logger as logger
+from app.utils.user_utils import format_referrer_info
+
+
+# Маппинг sub-method -> includeService для фильтрации методов на странице оплаты Lava
+LAVA_INCLUDE_SERVICE_MAP: dict[str | None, list[str] | None] = {
+    None: None,
+    'card': ['card'],
+    'sbp': ['sbp'],
+}
+
+
+# Маппинг статусов Lava -> internal
+LAVA_STATUS_MAP: dict[str, tuple[str, bool]] = {
+    'created': ('pending', False),
+    'pending': ('pending', False),
+    'processing': ('pending', False),  # на случай промежуточного статуса
+    'success': ('success', True),
+    'cancel': ('cancelled', False),
+    'cancelled': ('cancelled', False),
+    'expired': ('expired', False),
+    'error': ('error', False),
+    'failed': ('failed', False),
+}
+
+
+class LavaPaymentMixin:
+    """Mixin для работы с платежами Lava Business."""
+
+    async def create_lava_payment(
+        self,
+        db: AsyncSession,
+        *,
+        user_id: int | None,
+        amount_kopeks: int,
+        description: str = 'Пополнение баланса',
+        email: str | None = None,
+        language: str = 'ru',
+        payment_method_type: str | None = None,
+        return_url: str | None = None,
+    ) -> dict[str, Any] | None:
+        """Создаёт инвойс Lava."""
+        if not settings.is_lava_enabled():
+            logger.error('Lava не настроен')
+            return None
+
+        if amount_kopeks < settings.LAVA_MIN_AMOUNT_KOPEKS:
+            logger.warning(
+                'Lava: сумма меньше минимальной',
+                amount_kopeks=amount_kopeks,
+                LAVA_MIN_AMOUNT_KOPEKS=settings.LAVA_MIN_AMOUNT_KOPEKS,
+            )
+            return None
+
+        if amount_kopeks > settings.LAVA_MAX_AMOUNT_KOPEKS:
+            logger.warning(
+                'Lava: сумма больше максимальной',
+                amount_kopeks=amount_kopeks,
+                LAVA_MAX_AMOUNT_KOPEKS=settings.LAVA_MAX_AMOUNT_KOPEKS,
+            )
+            return None
+
+        payment_module = import_module('app.services.payment_service')
+        if user_id is not None:
+            user = await payment_module.get_user_by_id(db, user_id)
+            tg_id = user.telegram_id if user else user_id
+        else:
+            user = None
+            tg_id = 'guest'
+
+        # 32 hex char (128 бит) суффикс — order_id уникален даже при публичном tg_id
+        order_id = f'lava{tg_id}_{uuid.uuid4().hex}'
+        amount_rubles = amount_kopeks / 100
+        currency = settings.LAVA_CURRENCY
+
+        method_key = (payment_method_type or '').lower() or None
+        include_service = LAVA_INCLUDE_SERVICE_MAP.get(method_key)
+
+        metadata = {
+            'user_id': user_id,
+            'amount_kopeks': amount_kopeks,
+            'description': description,
+            'language': language,
+            'type': 'balance_topup',
+            'payment_method_type': method_key,
+            'email': email,
+        }
+
+        try:
+            hook_url = self._build_lava_hook_url()
+            if not hook_url:
+                logger.warning(
+                    'Lava: hook_url не сконфигурирован — '
+                    'платёж создаётся, но автоматическое подтверждение через webhook невозможно. '
+                    'Установите WEBHOOK_URL / WEB_API_BASE_URL / CABINET_URL.'
+                )
+            actual_return_url = return_url or settings.LAVA_RETURN_URL
+
+            api_result = await lava_service.create_invoice(
+                amount_rubles=amount_rubles,
+                order_id=order_id,
+                hook_url=hook_url,
+                success_url=actual_return_url,
+                fail_url=actual_return_url,
+                expire_minutes=settings.LAVA_PAYMENT_LIFETIME_MINUTES,
+                comment=(description or '')[:255] or None,
+                custom_fields=str(user_id) if user_id is not None else None,
+                include_service=include_service,
+            )
+
+            data = (api_result.get('data') or api_result) if isinstance(api_result, dict) else {}
+            lava_invoice_id = data.get('id') or data.get('invoice_id')
+            payment_url = data.get('url') or data.get('payment_url')
+            expired_str = data.get('expired')
+
+            if not payment_url:
+                # Без URL у пользователя нет способа оплатить — это аномалия Lava API.
+                # Row не сохраняем, чтобы не плодить «зависшие» pending-инвойсы без реквизитов.
+                logger.error(
+                    'Lava: ответ API без payment URL, инвойс не создан',
+                    order_id=order_id,
+                    lava_invoice_id=lava_invoice_id,
+                    response_keys=list(data.keys()) if isinstance(data, dict) else None,
+                )
+                return None
+
+            logger.info(
+                'Lava: получен ответ API',
+                order_id=order_id,
+                lava_invoice_id=lava_invoice_id,
+                payment_url=payment_url,
+            )
+
+            lifetime = settings.LAVA_PAYMENT_LIFETIME_MINUTES
+            expires_at = self._parse_lava_expired(expired_str) or (
+                datetime.now(UTC) + timedelta(minutes=lifetime)
+            )
+
+            lava_crud = import_module('app.database.crud.lava')
+            local_payment = await lava_crud.create_lava_payment(
+                db=db,
+                user_id=user_id,
+                order_id=order_id,
+                amount_kopeks=amount_kopeks,
+                currency=currency,
+                description=description,
+                payment_url=payment_url,
+                payment_method=method_key,
+                lava_invoice_id=str(lava_invoice_id) if lava_invoice_id else None,
+                expires_at=expires_at,
+                metadata_json=metadata,
+            )
+
+            logger.info(
+                'Lava: создан платеж',
+                order_id=order_id,
+                user_id=user_id,
+                amount_rubles=amount_rubles,
+                currency=currency,
+            )
+
+            return {
+                'order_id': order_id,
+                'amount_kopeks': amount_kopeks,
+                'amount_rubles': amount_rubles,
+                'currency': currency,
+                'payment_url': payment_url,
+                'payment_id': str(lava_invoice_id) if lava_invoice_id else None,
+                'expires_at': expires_at.isoformat(),
+                'local_payment_id': local_payment.id,
+            }
+
+        except Exception as e:
+            logger.exception('Lava: ошибка создания платежа', error=e)
+            return None
+
+    @staticmethod
+    def _parse_lava_expired(value: Any) -> datetime | None:
+        """Парсит поле ``expired`` из ответа Lava.
+
+        Принимаются только TZ-aware строки (ISO с offset/Z) или unix timestamp.
+        Naive-строки игнорируются — TZ Lava в спеке не задокументирована,
+        а угадывание UTC может сместить срок жизни инвойса на несколько часов.
+        Если парсинг не удался — caller использует fallback ``now + lifetime``.
+        """
+        if value is None or value == '':
+            return None
+        if isinstance(value, (int, float)):
+            try:
+                return datetime.fromtimestamp(float(value), tz=UTC)
+            except (ValueError, OSError):
+                return None
+        if isinstance(value, str):
+            try:
+                from dateutil.parser import isoparse  # type: ignore[import-not-found]
+
+                parsed = isoparse(value)
+                if parsed.tzinfo is None:
+                    return None  # без TZ доверять не можем
+                return parsed
+            except Exception:
+                return None
+        return None
+
+    @staticmethod
+    def _build_lava_hook_url() -> str | None:
+        """Собирает абсолютный URL вебхука для Lava."""
+        webhook_path = settings.LAVA_WEBHOOK_PATH or '/lava-webhook'
+        base = (
+            getattr(settings, 'WEBHOOK_URL', None)
+            or getattr(settings, 'WEB_API_BASE_URL', None)
+            or getattr(settings, 'CABINET_URL', None)
+        )
+        if not base:
+            return None
+        suffix = webhook_path if webhook_path.startswith('/') else f'/{webhook_path}'
+        return f'{base.rstrip("/")}{suffix}'
+
+    async def process_lava_callback(
+        self,
+        db: AsyncSession,
+        payload: dict[str, Any],
+    ) -> bool:
+        """Обрабатывает webhook от Lava (подпись уже проверена в webserver)."""
+        try:
+            lava_invoice_id = payload.get('invoice_id')
+            our_order_id = payload.get('order_id')
+            lava_status = (payload.get('status') or '').strip().lower()
+            pay_service = payload.get('pay_service')
+
+            if not our_order_id or not lava_status:
+                logger.warning('Lava webhook: отсутствуют обязательные поля')
+                return False
+
+            lava_crud = import_module('app.database.crud.lava')
+            payment = await lava_crud.get_lava_payment_by_order_id(db, our_order_id)
+            if not payment:
+                # Fallback по invoice_id, но строго проверяем совпадение order_id
+                if lava_invoice_id:
+                    payment = await lava_crud.get_lava_payment_by_invoice_id(db, str(lava_invoice_id))
+                    if payment and payment.order_id != our_order_id:
+                        logger.error(
+                            'Lava webhook: order_id mismatch',
+                            webhook_order_id=our_order_id,
+                            record_order_id=payment.order_id,
+                            invoice_id=lava_invoice_id,
+                        )
+                        return False
+                if not payment:
+                    logger.warning('Lava webhook: платеж не найден', order_id=our_order_id)
+                    return False
+
+            locked = await lava_crud.get_lava_payment_by_id_for_update(db, payment.id)
+            if not locked:
+                logger.error('Lava: не удалось заблокировать платёж', payment_id=payment.id)
+                return False
+            payment = locked
+
+            if payment.is_paid:
+                logger.info('Lava webhook: платеж уже обработан', order_id=payment.order_id)
+                return True
+
+            # Терминальные неуспешные статусы — стики, защита от повторного успеха
+            if payment.status in {'amount_mismatch', 'cancelled', 'cancel', 'error', 'expired', 'failed'}:
+                # Если внезапно пришёл success после терминальной неудачи — это сигнал
+                # подделки или ошибки на стороне Lava, эскалируем.
+                if lava_status == 'success':
+                    logger.error(
+                        'Lava webhook: success на терминально-неуспешном платеже, игнорируется',
+                        order_id=payment.order_id,
+                        current_status=payment.status,
+                    )
+                else:
+                    logger.warning(
+                        'Lava webhook: платёж в терминальном неуспешном статусе, игнорируется',
+                        order_id=payment.order_id,
+                        current_status=payment.status,
+                        incoming_status=lava_status,
+                    )
+                return True
+
+            if lava_status not in LAVA_STATUS_MAP:
+                logger.warning(
+                    'Lava webhook: неизвестный статус, обрабатываем как pending',
+                    order_id=payment.order_id,
+                    incoming_status=lava_status,
+                )
+            internal_status, is_paid = LAVA_STATUS_MAP.get(lava_status, ('pending', False))
+
+            callback_payload = {
+                'lava_invoice_id': lava_invoice_id,
+                'status': lava_status,
+                'amount': payload.get('amount'),
+                'credited': payload.get('credited'),
+                'pay_service': pay_service,
+                'pay_time': payload.get('pay_time'),
+                'payer_details': payload.get('payer_details'),
+                'custom_fields': payload.get('custom_fields'),
+            }
+
+            # Сверяем сумму ДО зачисления
+            if is_paid:
+                # Lava webhook содержит amount (сумма счёта в рублях, float).
+                # Сверяем с тем, что мы отправляли на создание.
+                received_amount = payload.get('amount')
+                if received_amount is not None:
+                    try:
+                        received_kopeks = round(float(received_amount) * 100)
+                    except (TypeError, ValueError):
+                        received_kopeks = None
+                    if received_kopeks is not None and abs(received_kopeks - payment.amount_kopeks) > 1:
+                        logger.error(
+                            'Lava amount mismatch',
+                            expected_kopeks=payment.amount_kopeks,
+                            received_kopeks=received_kopeks,
+                            order_id=payment.order_id,
+                        )
+                        await lava_crud.update_lava_payment_status(
+                            db=db,
+                            payment=payment,
+                            status='amount_mismatch',
+                            is_paid=False,
+                            callback_payload=callback_payload,
+                        )
+                        return False
+
+            if is_paid:
+                payment.status = internal_status
+                payment.is_paid = True
+                payment.paid_at = datetime.now(UTC)
+                if lava_invoice_id and not payment.lava_invoice_id:
+                    payment.lava_invoice_id = str(lava_invoice_id)
+                # Сохраняем pay_service в metadata, не перезаписывая user-выбранный payment_method
+                if pay_service:
+                    metadata_now = dict(getattr(payment, 'metadata_json', {}) or {})
+                    metadata_now['actual_pay_service'] = str(pay_service).lower()
+                    payment.metadata_json = metadata_now
+                payment.callback_payload = callback_payload
+                payment.updated_at = datetime.now(UTC)
+                await db.flush()
+                return await self._finalize_lava_payment(db, payment, trigger='webhook')
+
+            payment = await lava_crud.update_lava_payment_status(
+                db=db,
+                payment=payment,
+                status=internal_status,
+                is_paid=False,
+                callback_payload=callback_payload,
+            )
+            return True
+
+        except Exception as e:
+            logger.exception('Lava webhook: ошибка обработки', error=e)
+            return False
+
+    async def _finalize_lava_payment(
+        self,
+        db: AsyncSession,
+        payment: Any,
+        *,
+        trigger: str,
+    ) -> bool:
+        """Создаёт транзакцию, начисляет баланс и отправляет уведомления.
+
+        FOR UPDATE-lock уже взят вызывающим.
+        """
+        payment_module = import_module('app.services.payment_service')
+        lava_crud = import_module('app.database.crud.lava')
+
+        if payment.transaction_id:
+            logger.info(
+                'Lava платеж уже связан с транзакцией',
+                order_id=payment.order_id,
+                transaction_id=payment.transaction_id,
+                trigger=trigger,
+            )
+            return True
+
+        metadata = dict(getattr(payment, 'metadata_json', {}) or {})
+
+        from app.services.payment.common import try_fulfill_guest_purchase
+
+        guest_result = await try_fulfill_guest_purchase(
+            db,
+            metadata=metadata,
+            payment_amount_kopeks=payment.amount_kopeks,
+            provider_payment_id=payment.order_id,
+            provider_name='lava',
+        )
+        if guest_result is not None:
+            return True
+
+        if not payment.is_paid:
+            payment.status = 'success'
+            payment.is_paid = True
+            payment.paid_at = datetime.now(UTC)
+            payment.updated_at = datetime.now(UTC)
+
+        balance_already_credited = bool(metadata.get('balance_credited'))
+
+        user = await payment_module.get_user_by_id(db, payment.user_id)
+        if not user:
+            logger.error('Пользователь не найден для Lava', user_id=payment.user_id)
+            return False
+
+        await db.refresh(user, attribute_names=['promo_group', 'user_promo_groups'])
+        for user_promo_group in getattr(user, 'user_promo_groups', []):
+            await db.refresh(user_promo_group, attribute_names=['promo_group'])
+
+        promo_group = user.get_primary_promo_group()
+        subscription = getattr(user, 'subscription', None)
+        referrer_info = format_referrer_info(user)
+
+        transaction_external_id = payment.order_id
+
+        existing_transaction = None
+        if transaction_external_id:
+            existing_transaction = await payment_module.get_transaction_by_external_id(
+                db,
+                transaction_external_id,
+                PaymentMethod.LAVA,
+            )
+
+        display_name = settings.get_lava_display_name()
+        description = f'Пополнение через {display_name}'
+
+        transaction = existing_transaction
+        created_transaction = False
+
+        if not transaction:
+            transaction = await payment_module.create_transaction(
+                db,
+                user_id=payment.user_id,
+                type=TransactionType.DEPOSIT,
+                amount_kopeks=payment.amount_kopeks,
+                description=description,
+                payment_method=PaymentMethod.LAVA,
+                external_id=transaction_external_id,
+                is_completed=True,
+                created_at=getattr(payment, 'created_at', None),
+                commit=False,
+            )
+            created_transaction = True
+
+        await lava_crud.link_lava_payment_to_transaction(
+            db, payment=payment, transaction_id=transaction.id
+        )
+
+        should_credit_balance = created_transaction or not balance_already_credited
+
+        if not should_credit_balance:
+            logger.info('Lava платеж уже зачислил баланс ранее', order_id=payment.order_id)
+            return True
+
+        from app.database.crud.user import lock_user_for_update
+
+        user = await lock_user_for_update(db, user)
+
+        old_balance = user.balance_kopeks
+        was_first_topup = not user.has_made_first_topup
+
+        user.balance_kopeks += payment.amount_kopeks
+        user.updated_at = datetime.now(UTC)
+        await db.commit()
+        await db.refresh(user)
+
+        from app.database.crud.transaction import emit_transaction_side_effects
+
+        await emit_transaction_side_effects(
+            db,
+            transaction,
+            amount_kopeks=payment.amount_kopeks,
+            user_id=payment.user_id,
+            type=TransactionType.DEPOSIT,
+            payment_method=PaymentMethod.LAVA,
+            external_id=transaction_external_id,
+        )
+
+        topup_status = '\U0001f195 Первое пополнение' if was_first_topup else '\U0001f504 Пополнение'
+
+        try:
+            from app.services.referral_service import process_referral_topup
+
+            await process_referral_topup(
+                db,
+                user.id,
+                payment.amount_kopeks,
+                getattr(self, 'bot', None),
+            )
+        except Exception as error:
+            logger.error('Ошибка обработки реферального пополнения Lava', error=error)
+
+        if was_first_topup and not user.has_made_first_topup and not user.referred_by_id:
+            user.has_made_first_topup = True
+            await db.commit()
+            await db.refresh(user)
+
+        if getattr(self, 'bot', None):
+            try:
+                from app.services.admin_notification_service import AdminNotificationService
+
+                notification_service = AdminNotificationService(self.bot)
+                await notification_service.send_balance_topup_notification(
+                    user,
+                    transaction,
+                    old_balance,
+                    topup_status=topup_status,
+                    referrer_info=referrer_info,
+                    subscription=subscription,
+                    promo_group=promo_group,
+                    db=db,
+                )
+            except Exception as error:
+                logger.error('Ошибка отправки админ уведомления Lava', error=error)
+
+        if getattr(self, 'bot', None) and user.telegram_id:
+            try:
+                keyboard = await self.build_topup_success_keyboard(user)
+                await self.bot.send_message(
+                    user.telegram_id,
+                    (
+                        '✅ <b>Пополнение успешно!</b>\n\n'
+                        f'\U0001f4b0 Сумма: {settings.format_price(payment.amount_kopeks)}\n'
+                        f'\U0001f4b3 Способ: {display_name}\n'
+                        f'\U0001f194 Транзакция: {transaction.id}\n\n'
+                        'Баланс пополнен автоматически!'
+                    ),
+                    parse_mode='HTML',
+                    reply_markup=keyboard,
+                )
+            except Exception as error:
+                logger.error('Ошибка отправки уведомления пользователю Lava', error=error)
+
+        try:
+            from app.services.payment.common import send_cart_notification_after_topup
+
+            await send_cart_notification_after_topup(user, payment.amount_kopeks, db, getattr(self, 'bot', None))
+        except Exception as error:
+            logger.error(
+                'Ошибка при работе с сохраненной корзиной для пользователя',
+                user_id=payment.user_id,
+                error=error,
+                exc_info=True,
+            )
+
+        metadata['balance_change'] = {
+            'old_balance': old_balance,
+            'new_balance': user.balance_kopeks,
+            'credited_at': datetime.now(UTC).isoformat(),
+        }
+        metadata['balance_credited'] = True
+        payment.metadata_json = metadata
+        await db.commit()
+
+        logger.info(
+            'Обработан Lava платеж',
+            order_id=payment.order_id,
+            user_id=payment.user_id,
+            trigger=trigger,
+        )
+
+        return True
+
+    async def check_lava_payment_status(
+        self,
+        db: AsyncSession,
+        order_id: str | None = None,
+        invoice_id: str | None = None,
+    ) -> dict[str, Any] | None:
+        """Запрос статуса инвойса через API Lava."""
+        try:
+            return await lava_service.get_invoice_status(order_id=order_id, invoice_id=invoice_id)
+        except Exception as e:
+            logger.error(
+                'Lava: ошибка проверки статуса',
+                order_id=order_id,
+                invoice_id=invoice_id,
+                error=e,
+            )
+            return None

app/services/payment_method_config_service.py

@@ -230,6 +230,16 @@ def _get_method_defaults() -> dict:
                 {'id': 'sbp_qr', 'name': 'СБП QR'},
             ],
         },
+        'lava': {
+            'default_display_name': settings.get_lava_display_name(),
+            'is_configured': settings.is_lava_enabled(),
+            'default_min': settings.LAVA_MIN_AMOUNT_KOPEKS,
+            'default_max': settings.LAVA_MAX_AMOUNT_KOPEKS,
+            'available_sub_options': [
+                {'id': 'card', 'name': 'Карта'},
+                {'id': 'sbp', 'name': 'СБП'},
+            ],
+        },
     }
 
 
@@ -280,6 +290,7 @@ DEFAULT_METHOD_ORDER = [
     'antilopay',
     'jupiter',
     'donut',
+    'lava',
 ]
 
 

app/services/payment_service.py

@@ -38,6 +38,7 @@ from app.services.payment.etoplatezhi import EtoplatezhiPaymentMixin
 from app.services.payment.freekassa import FreekassaPaymentMixin
 from app.services.payment.jupiter import JupiterPaymentMixin
 from app.services.payment.kassa_ai import KassaAiPaymentMixin
+from app.services.payment.lava import LavaPaymentMixin
 from app.services.payment.overpay import OverpayPaymentMixin
 from app.services.payment.paypear import PayPearPaymentMixin
 from app.services.payment.riopay import RioPayPaymentMixin
@@ -626,6 +627,41 @@ async def link_donut_payment_to_transaction(*args, **kwargs):
     return await donut_crud.link_donut_payment_to_transaction(*args, **kwargs)
 
 
+async def create_lava_payment(*args, **kwargs):
+    lava_crud = import_module('app.database.crud.lava')
+    return await lava_crud.create_lava_payment(*args, **kwargs)
+
+
+async def get_lava_payment_by_order_id(*args, **kwargs):
+    lava_crud = import_module('app.database.crud.lava')
+    return await lava_crud.get_lava_payment_by_order_id(*args, **kwargs)
+
+
+async def get_lava_payment_by_invoice_id(*args, **kwargs):
+    lava_crud = import_module('app.database.crud.lava')
+    return await lava_crud.get_lava_payment_by_invoice_id(*args, **kwargs)
+
+
+async def get_lava_payment_by_id(*args, **kwargs):
+    lava_crud = import_module('app.database.crud.lava')
+    return await lava_crud.get_lava_payment_by_id(*args, **kwargs)
+
+
+async def get_lava_payment_by_id_for_update(*args, **kwargs):
+    lava_crud = import_module('app.database.crud.lava')
+    return await lava_crud.get_lava_payment_by_id_for_update(*args, **kwargs)
+
+
+async def update_lava_payment_status(*args, **kwargs):
+    lava_crud = import_module('app.database.crud.lava')
+    return await lava_crud.update_lava_payment_status(*args, **kwargs)
+
+
+async def link_lava_payment_to_transaction(*args, **kwargs):
+    lava_crud = import_module('app.database.crud.lava')
+    return await lava_crud.link_lava_payment_to_transaction(*args, **kwargs)
+
+
 # Mapping from model_name to getter function name for providers
 # where it differs from the standard get_{model_name}_payment_by_id pattern.
 _GETTER_OVERRIDES: dict[str, str] = {
@@ -657,6 +693,7 @@ class PaymentService(
     AntilopayPaymentMixin,
     JupiterPaymentMixin,
     DonutPaymentMixin,
+    LavaPaymentMixin,
 ):
     """Основной интерфейс платежей, делегирующий работу специализированным mixin-ам."""
 
@@ -1252,6 +1289,28 @@ class PaymentService(
                 }
             return None
 
+        # --- Lava -------------------------------------------------------------
+        if payment_method == 'lava':
+            if not settings.is_lava_enabled():
+                logger.warning('Lava is not enabled, cannot create guest payment')
+                return None
+
+            result = await self.create_lava_payment(
+                db=db,
+                user_id=None,
+                amount_kopeks=amount_kopeks,
+                description=description,
+                return_url=return_url,
+            )
+            if result:
+                await _patch_guest_metadata(result['local_payment_id'], 'lava')
+                return {
+                    'payment_url': result.get('payment_url'),
+                    'payment_id': result.get('order_id'),
+                    'provider': 'lava',
+                }
+            return None
+
         # --- Telegram Stars ---------------------------------------------------
         if payment_method == 'telegram_stars':
             if not settings.TELEGRAM_STARS_ENABLED:

app/services/system_settings_service.py

@@ -99,6 +99,7 @@ class BotConfigurationService:
         'ETOPLATEZHI': '💳 Etoplatezhi',
         'JUPITER': '🪐 Jupiter',
         'DONUT': '🍩 Donut',
+        'LAVA': '🌋 Lava',
         'YOOKASSA': '🟣 YooKassa',
         'PLATEGA': '💳 {platega_name}',
         'TRIBUTE': '🎁 Tribute',
@@ -167,6 +168,7 @@ class BotConfigurationService:
         'ETOPLATEZHI': 'Etoplatezhi: paymentpage.etoplatezhi.ru, оплата картой и через СБП.',
         'JUPITER': 'Jupiter (FPGate P2P v2.1): app.juppiter.tech, эквайринг СБП с HMAC-SHA256.',
         'DONUT': 'Donut P2P: gw.donut.business, P2P-оплата картой, СБП по телефону и QR.',
+        'LAVA': 'Lava Business: gate.lava.ru, оплата картой и СБП с HMAC-SHA256 и подтверждением через webhook.',
         'PLATEGA': '{platega_name}: merchant ID, секрет, ссылки возврата и методы оплаты.',
         'MULENPAY': 'Платежи {mulenpay_name} и параметры магазина.',
         'PAL24': 'PAL24 / PayPalych подключения и лимиты.',
@@ -385,6 +387,7 @@ class BotConfigurationService:
         'ETOPLATEZHI_': 'ETOPLATEZHI',
         'JUPITER_': 'JUPITER',
         'DONUT_': 'DONUT',
+        'LAVA_': 'LAVA',
         'PLATEGA_': 'PLATEGA',
         'MULENPAY_': 'MULENPAY',
         'PAL24_': 'PAL24',

app/webserver/payments.py

@@ -1610,6 +1610,54 @@ def create_payment_router(bot: Bot, payment_service: PaymentService) -> APIRoute
 
         routes_registered = True
 
+    # Lava webhook (Lava Business)
+    if settings.is_lava_enabled():
+
+        @router.get(settings.LAVA_WEBHOOK_PATH)
+        async def lava_health() -> JSONResponse:
+            return JSONResponse(
+                {
+                    'status': 'ok',
+                    'service': 'lava_webhook',
+                    'enabled': settings.is_lava_enabled(),
+                }
+            )
+
+        @router.post(settings.LAVA_WEBHOOK_PATH)
+        async def lava_webhook(request: Request) -> JSONResponse:
+            try:
+                raw_body = await request.body()
+                payload = json.loads(raw_body)
+            except Exception as parse_error:
+                logger.error('Lava webhook: failed to parse JSON', parse_error=parse_error)
+                return JSONResponse({'status': 'error'}, status_code=status.HTTP_400_BAD_REQUEST)
+
+            from app.services.lava_service import lava_service
+
+            received_signature = (request.headers.get('Authorization') or '').strip()
+            if not lava_service.verify_webhook_signature(raw_body, received_signature):
+                logger.warning('Lava webhook: invalid signature')
+                return JSONResponse({'status': 'error'}, status_code=status.HTTP_400_BAD_REQUEST)
+
+            try:
+                success = await _process_payment_service_callback(
+                    payment_service,
+                    payload,
+                    'process_lava_callback',
+                )
+                if not success:
+                    logger.error(
+                        'Lava webhook processing failed',
+                        order_id=payload.get('order_id'),
+                        invoice_id=payload.get('invoice_id'),
+                    )
+            except Exception as e:
+                logger.exception('Lava webhook processing error', error=e)
+            # Lava ожидает HTTP 200 как подтверждение приёма; иначе будет повтор до 5 раз раз в 150с
+            return JSONResponse({'status': 'ok'}, status_code=status.HTTP_200_OK)
+
+        routes_registered = True
+
     # Donut webhook (Donut P2P)
     if settings.is_donut_enabled():
 
@@ -1684,6 +1732,7 @@ def create_payment_router(bot: Bot, payment_service: PaymentService) -> APIRoute
                     'antilopay_enabled': settings.is_antilopay_enabled(),
                     'jupiter_enabled': settings.is_jupiter_enabled(),
                     'donut_enabled': settings.is_donut_enabled(),
+                    'lava_enabled': settings.is_lava_enabled(),
                 }
             )