```

feat(player): 优化金币兑换功能

- 在ServiceUpdate方法中返回更新后的数据而不是nil
- 新增DuihuanGold方法用于处理金币兑换逻辑
- 修改黄金列表控制器中的兑换计算逻辑，区分费用和获得金币的计算
- 在添加操作前验证用户金币余额是否充足
- 修正了兑换比例计算和余额检查逻辑
```

modules/base/service/base_sys_user.go

@@ -60,7 +60,14 @@ func (s *BaseSysUserService) DuihuanFreeGold(userId uint32, gold, free int64) {
 	}).Update()
 
 }
+func (s *BaseSysUserService) DuihuanGold(userId uint32, gold, free int64) {
+	m := cool.DBM(s.Model).Where("id", userId)
+	m.Data(g.Map{
+		"goldbean":  gdb.Raw("goldbean+" + gconv.String(gold)),
+		"free_gold": gdb.Raw("free_gold-" + gconv.String(free)),
+	}).Update()
 
+}
 func (s *BaseSysUserService) UpdateFreeGold(userId uint32, gold int64) {
 
 	m := cool.DBM(s.Model).Where("id", userId)

modules/player/controller/admin/gold_list.go

@@ -43,8 +43,9 @@ func (c *GoldListController) DuihuanGold(ctx context.Context, req *DuihuanGoldAd
 		return
 	}
 
-	all := r.Rate * float64(r.ExchangeNum)
-	if base.NewBaseSysUserService().GetFreeGold(t.UserId) < int64(all*105) {
+	costfree := r.Rate * float64(r.ExchangeNum)
+	getgold := 1 / r.Rate * float64(r.ExchangeNum)
+	if base.NewBaseSysUserService().GetFreeGold(t.UserId) < int64(costfree*100) {
 		err = fmt.Errorf("余额不足")
 		return
 	}
@@ -52,8 +53,8 @@ func (c *GoldListController) DuihuanGold(ctx context.Context, req *DuihuanGoldAd
 		err = fmt.Errorf("未到购买时间")
 		return
 	}
-	base.NewBaseSysUserService().UpdateGold(uint32(r.PlayerID), int64(all*95))
-	base.NewBaseSysUserService().UpdateFreeGold(uint32(t.UserId), -int64(all*105))
+	base.NewBaseSysUserService().DuihuanFreeGold(uint32(r.PlayerID), int64(r.ExchangeNum*100), int64(costfree*95))
+	base.NewBaseSysUserService().DuihuanGold(uint32(t.UserId), int64(getgold*95), int64(costfree*100))
 	res = cool.Ok(nil)
 	return
 }

modules/player/service/gold_list.go

@@ -2,11 +2,13 @@ package service
 
 import (
 	"blazing/cool"
+	"blazing/modules/base/service"
 	"blazing/modules/player/model"
 	"context"
 	"fmt"
 
 	"github.com/gogf/gf/v2/frame/g"
+	"github.com/gogf/gf/v2/util/gconv"
 )
 
 type GoldListService struct {
@@ -17,8 +19,10 @@ func (s *GoldListService) ModifyBefore(ctx context.Context, method string, param
 	admin := cool.GetAdmin(ctx)
 	userId := admin.UserId
 
-	g.RequestFromCtx(ctx).SetParam("player_id", userId)
 	if method == "Add" {
+		if service.NewBaseSysUserService().GetGold(userId) < gconv.Int64(param["exchange_num"])*100 {
+			return fmt.Errorf("金额不足")
+		}
 
 		t, _ := s.dbm_fix(s.Model).Where("player_id", userId).Where("status", 0).Count()
 		if t > 0 {