diff --git a/README.md b/README.md
index 5968e42..9f01532 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,9 @@
 ## TODO
 
+异常展示全部信息，只返回 bizerr 的内容，控制台打印全部 err 内容
+
+ip 提取频率限制，在 ensure 函数加逻辑，通过 redis 或者 pg 计算分钟内提取次数，只允许每分钟提取 30 次
+
 proxy 的删除和更新，锁粒度应该有问题
 
 交易信息持久化
diff --git a/scripts/sql/fill.sql b/scripts/sql/fill.sql
index bb1181c..1ac333e 100644
--- a/scripts/sql/fill.sql
+++ b/scripts/sql/fill.sql
@@ -259,6 +259,10 @@ insert into permission (parent_id, name, description, sort) values
 insert into permission (parent_id, name, description, sort) values
     ((select id from permission where name = 'balance_activity:read' and deleted_at is null), 'balance_activity:read:of_user', '读取指定用户的余额变动列表', 1);
 
+-- coupon:write 子权限
+insert into permission (parent_id, name, description, sort) values
+    ((select id from permission where name = 'coupon:write'        and deleted_at is null), 'coupon:write:assign',       '发放优惠券', 1);
+
 -- --------------------------
 -- level 4
 -- --------------------------
diff --git a/web/core/scopes.go b/web/core/scopes.go
index 2e7ef43..2b1c909 100644
--- a/web/core/scopes.go
+++ b/web/core/scopes.go
@@ -48,9 +48,10 @@ const (
 	ScopeUserWriteBalanceDec = string("user:write:balance:dec") // 减少用户余额
 	ScopeUserWriteBind       = string("user:write:bind")        // 用户认领
 
-	ScopeCoupon      = string("coupon")       // 优惠券
-	ScopeCouponRead  = string("coupon:read")  // 读取优惠券列表
-	ScopeCouponWrite = string("coupon:write") // 写入优惠券
+	ScopeCoupon            = string("coupon")              // 优惠券
+	ScopeCouponRead        = string("coupon:read")         // 读取优惠券列表
+	ScopeCouponWrite       = string("coupon:write")        // 写入优惠券
+	ScopeCouponWriteAssign = string("coupon:write:assign") // 发放优惠券
 
 	ScopeBatch           = string("batch")              // 批次
 	ScopeBatchRead       = string("batch:read")         // 读取批次列表
diff --git a/web/handlers/coupon.go b/web/handlers/coupon.go
index fbfb007..8861062 100644
--- a/web/handlers/coupon.go
+++ b/web/handlers/coupon.go
@@ -103,3 +103,27 @@ func DeleteCoupon(c *fiber.Ctx) error {
 
 	return nil
 }
+
+func AssignCoupon(c *fiber.Ctx) error {
+	_, err := auth.GetAuthCtx(c).PermitAdmin(core.ScopeCouponWriteAssign)
+	if err != nil {
+		return err
+	}
+
+	var req AssignCouponReq
+	if err := g.Validator.ParseBody(c, &req); err != nil {
+		return err
+	}
+
+	err = s.Coupon.Assign(req.CouponID, req.UserID)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+type AssignCouponReq struct {
+	CouponID int32 `json:"coupon_id" validate:"required"`
+	UserID   int32 `json:"user_id" validate:"required"`
+}
diff --git a/web/routes.go b/web/routes.go
index eb15579..09a9c9f 100644
--- a/web/routes.go
+++ b/web/routes.go
@@ -253,4 +253,5 @@ func adminRouter(api fiber.Router) {
 	coupon.Post("/create", handlers.CreateCoupon)
 	coupon.Post("/update", handlers.UpdateCoupon)
 	coupon.Post("/remove", handlers.DeleteCoupon)
+	coupon.Post("/update/assign", handlers.AssignCoupon)
 }
diff --git a/web/services/channel_baiyin.go b/web/services/channel_baiyin.go
index 92fecd9..3bdec4c 100644
--- a/web/services/channel_baiyin.go
+++ b/web/services/channel_baiyin.go
@@ -99,6 +99,7 @@ func (s *channelBaiyinProvider) CreateChannels(source netip.Addr, resourceId int
 		Sort:            u.P("ip_unchanged_time_asc"),
 	})
 	if err != nil {
+		fmt.Printf("获取可用节点失败: %v\n", err)
 		return nil, core.NewBizErr("获取可用节点失败", err)
 	}
 	if edgesResp.Total != count && len(edgesResp.Edges) != count {