feat: add mpre endpoints

src/application/commands/create_order_command.py

@@ -1,14 +1,14 @@
 from __future__ import annotations
 from datetime import datetime, timezone
-from decimal import Decimal, ROUND_UP
+from decimal import Decimal
 from ulid import ULID
 from src.application.abstractions import IUnitOfWork
-from src.application.contracts import ICache,ILogger
+from src.application.contracts import ILogger
 from src.application.contracts import IItPayService
 from src.application.domain.entities.order import OrderEntity
 from src.application.domain.enums import OrderStatus
-from src.application.domain.exceptions import ApplicationException,ServiceUnavailableException
-from src.infrastructure.config import settings
+from src.application.domain.exceptions import ApplicationException
+from src.application.services import PaymentQuoteService
 from src.infrastructure.database.decorators import transactional
 from src.presentation.schemas.order import CreateOrder
 
@@ -20,12 +20,12 @@ class CreateOrderCommand:
             *,
             unit_of_work: IUnitOfWork,
             logger: ILogger,
-            remote_cache: ICache,
+            payment_quote_service: PaymentQuoteService,
             itpay_service: IItPayService,
     ) -> None:
         self._unit_of_work = unit_of_work
         self._logger = logger
-        self._remote_cache = remote_cache
+        self._payment_quote_service = payment_quote_service
         self._itpay_service = itpay_service
 
 
@@ -33,22 +33,11 @@ class CreateOrderCommand:
     async def __call__(self, payment_data: CreateOrder, user_id: str) -> OrderEntity:
         client_payment_id = str(ULID())
 
-        rate_raw = await self._remote_cache.hget('tradex:rub:rate','value')
-        gas_raw = await self._remote_cache.hget('gwei:eth:last','normal_rub')
-        self._logger.info(f'Actual market values: rate={rate_raw}, gas={gas_raw}')
-
-        if rate_raw is None:
-            self._logger.error('Exchange rate unavailable')
-            raise ServiceUnavailableException(message='Exchange rate unavailable')
-
-        if gas_raw is None:
-            self._logger.error('Exchange gas unavailable')
-            raise ServiceUnavailableException(message='Exchange gas unavailable')
-
-        actual_gas_fee = Decimal(gas_raw).quantize(Decimal('0.00'), rounding=ROUND_UP)
-        actual_usdt_exchange_rate = Decimal(rate_raw).quantize(Decimal('0.00'), rounding=ROUND_UP)
-        actual_service_fee = (payment_data.usdt_amount * actual_usdt_exchange_rate * settings.PAYMENT_SERVICE_FEE_RATE).quantize(Decimal('0.01'))
-        actual_total_price = (payment_data.usdt_amount * actual_usdt_exchange_rate + actual_service_fee + actual_gas_fee).quantize(Decimal('0.01'))
+        quote = await self._payment_quote_service.get_quote(payment_data.usdt_amount)
+        actual_gas_fee = quote.gas_fee
+        actual_usdt_exchange_rate = quote.usdt_exchange_rate
+        actual_service_fee = quote.service_fee
+        actual_total_price = quote.total_price
         if actual_total_price > payment_data.total_price * Decimal('1.01'):
             self._logger.error('Price has changed, please refresh and try again')
             raise ApplicationException(status_code=409, message='Price has changed, please refresh and try again')