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SMCryptoUtils/ISignUtil.cs

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+using Newtonsoft.Json.Linq;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SMCryptoUtils
+{
+    public interface ISignUtil
+    {
+        string getObjString(object obj);
+        string getSignText(JObject jsonObject, string appSecret);
+    }
+}