fix: update quote sum

src/application/services/payment_quote_service.py

@@ -142,13 +142,11 @@ class PaymentQuoteService:
 
         usdt_exchange_rate, gas_fee = await self._load_prices()
 
-        u_budget = ((total_rub - gas_fee) / usdt_exchange_rate).quantize(Decimal('0.01'), rounding=ROUND_DOWN)
         u_cap = ((_MAX_TOTAL_RUB - gas_fee) / (usdt_exchange_rate * Decimal('1.04'))).quantize(
             Decimal('0.01'),
             rounding=ROUND_DOWN,
         )
-        u_upper = min(u_budget, u_cap)
-        n_hi = int((u_upper * 100).to_integral_value(rounding=ROUND_DOWN))
+        n_hi = int((u_cap * 100).to_integral_value(rounding=ROUND_DOWN))
         if n_hi < 1:
             raise OrderTotalOutOfRangeException(
                 message='Order total is below minimum allowed amount',
@@ -163,15 +161,15 @@ class PaymentQuoteService:
             if quote is None:
                 n_hi = mid - 1
                 continue
-            if quote.total_price <= total_rub:
+            if quote.total_price >= total_rub:
                 best_cent = mid
-                n_lo = mid + 1
-            else:
                 n_hi = mid - 1
+            else:
+                n_lo = mid + 1
 
         if best_cent is None:
             raise OrderTotalOutOfRangeException(
-                message='Order total is below minimum allowed amount',
+                message='Order total exceeds maximum allowed amount',
             )
 
         final = self._compose_quote(