添加部分退款接口

pluss-dao-bundle/src/main/java/cn/pluss/platform/mapper/MerchantRefundOrderMapper.java

@@ -5,7 +5,9 @@ import com.baomidou.mybatisplus.core.mapper.BaseMapper;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import org.apache.ibatis.annotations.Mapper;
 import org.apache.ibatis.annotations.Param;
+import org.apache.ibatis.annotations.Select;
 
+import java.math.BigDecimal;
 import java.util.List;
 import java.util.Map;
 
@@ -24,4 +26,6 @@ public interface MerchantRefundOrderMapper extends BaseMapper<MerchantRefundOrde
      * @return java.util.Map<java.lang.String,java.lang.Object>
      */
     Map<String, Object> getPlatformRefundData();
+
+    BigDecimal selectOrderByOrderNumber(String orderNumber);
 }