From da1ebd72f4f02ee06edbd2c8c9019334bcca6352 Mon Sep 17 00:00:00 2001
From: Echo <1711788888@qq.com>
Date: Thu, 31 Jul 2025 02:40:37 +0800
Subject: [PATCH] =?UTF-8?q?:art:=20=E4=BC=98=E5=8C=96=E4=BD=99=E9=A2=9D?=
 =?UTF-8?q?=E6=94=AF=E4=BB=98=E9=80=BB=E8=BE=91?=
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---
 service/app/order.go | 21 ++++++++++++++-------
 1 file changed, 14 insertions(+), 7 deletions(-)

diff --git a/service/app/order.go b/service/app/order.go
index 64093ef..6dfca33 100644
--- a/service/app/order.go
+++ b/service/app/order.go
@@ -2,6 +2,7 @@ package app
 
 import (
 	"fmt"
+
 	"git.echol.cn/loser/lckt/global"
 	"git.echol.cn/loser/lckt/model/app"
 	"git.echol.cn/loser/lckt/model/app/request"
@@ -112,16 +113,22 @@ func (s *OrderService) BalancePay(p request.BalancePay) error {
 		global.GVA_LOG.Error("查询用户信息失败", zap.Error(err))
 		return err
 	}
-	// 将user.Balance转为int64类型进行比较
-	balance := int64(user.Balance)
-	if balance < order.Price/100 { // 订单价格是以分为单位存储的
-		global.GVA_LOG.Error("用户余额不足", zap.Int64("balance", balance), zap.Int64("order_price", order.Price))
+
+	// 将订单价格从分转换为元（保持精度）
+	orderPriceInYuan := float64(order.Price) / 100.0
+
+	// 检查用户余额是否足够（使用float64进行比较，避免精度丢失）
+	if user.Balance < float32(orderPriceInYuan) {
+		global.GVA_LOG.Error("用户余额不足",
+			zap.Float32("balance", user.Balance),
+			zap.Float64("order_price_yuan", orderPriceInYuan),
+			zap.Int64("order_price_cent", order.Price))
 		return fmt.Errorf("用户余额不足")
 	}
 
-	// 扣除用户余额
-	balance -= order.Price / 100
-	err = global.GVA_DB.Model(&user).Where("id = ?", p.UserId).Update("balance", balance).Error
+	// 扣除用户余额（保持精度）
+	newBalance := user.Balance - float32(orderPriceInYuan)
+	err = global.GVA_DB.Model(&user).Where("id = ?", p.UserId).Update("balance", newBalance).Error
 	if err != nil {
 		global.GVA_LOG.Error("扣除用户余额失败", zap.Error(err))
 		return err