diff --git a/leanwork_request.go b/leanwork_request.go
index 5968c9b..c7e833c 100644
--- a/leanwork_request.go
+++ b/leanwork_request.go
@@ -1,5 +1,11 @@
 package main
 
+import (
+	"errors"
+
+	"github.com/go-sql-driver/mysql"
+)
+
 type LeanworkRequest struct {
 	Id            int64
 	PickupUrl     string
@@ -11,5 +17,38 @@ type LeanworkRequest struct {
 	CustomerId    string
 	Sign          string
 	Valid         bool
+	Ts            mysql.NullTime
 	Ip4           uint32
+	Ip4Location   string
+}
+
+//
+func lrIsIdMatchSign(id string, sign string) bool {
+	_, err := getRequestRowByIdAndSign(id, sign)
+	return err == nil
+}
+
+func getRequestRowByIdAndSign(id string, sign string) (row LeanworkRequest, err error) {
+	//retrieve form DB
+	row = LeanworkRequest{}
+	db.conn(Config)
+	selDB, err := db.h.Query("SELECT * FROM request WHERE id=? and sign=?", id, sign)
+	if err != nil {
+		return
+	}
+	count := 0
+	for selDB.Next() {
+		err = selDB.Scan(&row.Id, &row.PickupUrl, &row.ReceiveUrl, &row.SignType,
+			&row.OrderNo, &row.OrderAmount, &row.OrderCurrency, &row.CustomerId,
+			&row.Sign, &row.Valid, &row.Ts, &row.Ip4, &row.Ip4Location)
+		if err != nil {
+			return
+		}
+		count++
+	}
+
+	if count <= 0 {
+		err = errors.New("no record found by the given id (" + id + ") and  sign(" + sign + ")")
+	}
+	return
 }