fix: 微信支付元转分改用 Decimal，修复 2.01 元被收 2 元

shop/views.py

@@ -33,6 +33,7 @@ from rest_framework.permissions import AllowAny, IsAuthenticated
 from rest_framework_simplejwt.tokens import RefreshToken
 
 from utils.oss_utils import upload_to_oss, delete_from_oss, get_oss_client
+from utils.money import yuan_to_fen
 
 from .utils import verify_shop_permission
 from shop.utils import verify_shop_permission, update_dianpu_daily_stat
@@ -2673,7 +2674,7 @@ class ShopRefundView(APIView):
             return {'code': 500, 'msg': '微信支付配置不完整'}
 
         out_refund_no = self._generate_refund_no(order.OrderID)
-        total_fee = int(float(order.Amount or 0) * 100)
+        total_fee = yuan_to_fen(order.Amount or 0)
         refund_fee = total_fee
 
         params = {