新增订单待支付与支付确认后端流程

backend/internal/modules/order/handler.go

@@ -152,6 +152,23 @@ func (h *Handler) Cancel(c *gin.Context) {
 	response.OK(c, gin.H{"cancelled": true})
 }
 
+func (h *Handler) Pay(c *gin.Context) {
+	userID, ok := currentUserID(c)
+	if !ok {
+		response.Unauthorized(c, "缺少用户上下文")
+		return
+	}
+	id, ok := parseID(c)
+	if !ok {
+		return
+	}
+	if err := h.service.Pay(userID, id); err != nil {
+		writeOrderError(c, err)
+		return
+	}
+	response.OK(c, gin.H{"paid": true})
+}
+
 func (h *Handler) SubmitHandoff(c *gin.Context) {
 	userID, ok := currentUserID(c)
 	if !ok {
@@ -287,6 +304,10 @@ func writeOrderError(c *gin.Context, err error) {
 		response.Error(c, http.StatusConflict, "listing_unavailable", "该账号暂不可租")
 	case errors.Is(err, ErrCannotRentOwnListing):
 		response.BadRequest(c, "不能租用自己发布的账号")
+	case errors.Is(err, ErrInsufficientBalance):
+		response.Error(c, http.StatusConflict, "insufficient_balance", "钱包余额不足，请先充值")
+	case errors.Is(err, ErrOrderCannotPay):
+		response.Error(c, http.StatusConflict, "order_cannot_pay", "当前订单不能支付")
 	case errors.Is(err, ErrOrderCannotCancel):
 		response.Error(c, http.StatusConflict, "order_cannot_cancel", "当前订单不能取消")
 	case errors.Is(err, ErrOrderCannotHandoff):