diff --git a/src/ICanPay.Alipay/AlipayGateway.cs b/src/ICanPay.Alipay/AlipayGateway.cs
index 45405fe..a1fc619 100644
--- a/src/ICanPay.Alipay/AlipayGateway.cs
+++ b/src/ICanPay.Alipay/AlipayGateway.cs
@@ -44,8 +44,6 @@ namespace ICanPay.Alipay
 
         public new Notify Notify => (Notify)base.Notify;
 
-        protected override bool IsWaitPay => Notify.TradeStatus == Constant.WAIT_BUYER_PAY;
-
         protected override bool IsSuccessPay => Notify.TradeStatus == Constant.TRADE_SUCCESS;
 
         protected override string[] NotifyVerifyParameter => new string[]
@@ -123,7 +121,6 @@ namespace ICanPay.Alipay
                     TradeNo = tradeNo
                 });
                 var queryResponse = NetExecute(queryRequest);
-                //TODO:检测签名
                 if (queryResponse.TradeStatus == Constant.TRADE_SUCCESS)
                 {
                     return true;
@@ -166,11 +163,16 @@ namespace ICanPay.Alipay
             return false;
         }
 
-        private string BuildSign(GatewayData gatewayData)
+        protected override string BuildSign(GatewayData gatewayData)
         {
             return EncryptUtil.RSA(gatewayData.ToUrl(false), Merchant.Privatekey, Merchant.SignType);
         }
 
+        protected override bool CheckSign(string data, string sign)
+        {
+            return EncryptUtil.RSAVerifyData(data, sign, Merchant.AlipayPublicKey, Merchant.SignType);
+        }
+
         /// <summary>
         /// 是否是已成功支付的支付通知
         /// </summary>
@@ -231,10 +233,18 @@ namespace ICanPay.Alipay
             GatewayData.FromJson(body);
             string sign = GatewayData.GetStringValue(Constant.SIGN);
             GatewayData.Remove(Constant.SIGN);
-            GatewayData.FromJson(GatewayData[0].Value.ToString());
+            string data = GatewayData[0].Value.ToString();
+
+            if (!CheckSign(data, sign))
+            {
+                throw new GatewayException("签名验证失败");
+            }
+
+            GatewayData.FromJson(data);
             GatewayData.Add(Constant.SIGN, sign);
             GatewayData.Add(BODY, body);
 
+            //TODO:待优化
             return GatewayData.ToObject<TResponse>(StringCase.Snake);
         }
 
diff --git a/src/ICanPay.Core/Gateways/BaseGateway.cs b/src/ICanPay.Core/Gateways/BaseGateway.cs
index c19376e..38ccf9c 100644
--- a/src/ICanPay.Core/Gateways/BaseGateway.cs
+++ b/src/ICanPay.Core/Gateways/BaseGateway.cs
@@ -92,11 +92,6 @@ namespace ICanPay.Core
         /// </summary>
         protected internal abstract bool IsSuccessPay { get; }
 
-        /// <summary>
-        /// 是否等待支付
-        /// </summary>
-        protected abstract bool IsWaitPay { get; }
-
         /// <summary>
         /// 需要验证的参数名称数组，用于识别不同的网关类型。
         /// 商户号(AppId)必须放第一位
@@ -130,8 +125,30 @@ namespace ICanPay.Core
             HttpUtil.Write(FAILURE);
         }
 
+        /// <summary>
+        /// 执行请求
+        /// </summary>
+        /// <typeparam name="TModel">数据模型</typeparam>
+        /// <typeparam name="TResponse">返回模型</typeparam>
+        /// <param name="request">请求</param>
+        /// <returns></returns>
         public abstract TResponse Execute<TModel, TResponse>(Request<TModel, TResponse> request) where TResponse : IResponse;
 
+        /// <summary>
+        /// 生成签名
+        /// </summary>
+        /// <param name="gatewayData">网关数据</param>
+        /// <returns></returns>
+        protected abstract string BuildSign(GatewayData gatewayData);
+
+        /// <summary>
+        /// 检验签名
+        /// </summary>
+        /// <param name="data">待验证数据</param>
+        /// <param name="sign">签名</param>
+        /// <returns></returns>
+        protected abstract bool CheckSign(string data, string sign);
+
         #endregion
 
         #endregion
diff --git a/src/ICanPay.Core/Gateways/GatewayData.cs b/src/ICanPay.Core/Gateways/GatewayData.cs
index 6020b01..40703e3 100644
--- a/src/ICanPay.Core/Gateways/GatewayData.cs
+++ b/src/ICanPay.Core/Gateways/GatewayData.cs
@@ -484,10 +484,16 @@ namespace ICanPay.Core
                 if (!string.IsNullOrEmpty(json))
                 {
                     var jObject = JObject.Parse(json);
-                    var list = jObject.Children().OfType<JProperty>();
-                    foreach (var item in list)
+                    foreach (var item in jObject)
                     {
-                        Add(item.Name, item.Value.ToString());
+                        if (item.Value.Type == JTokenType.Object)
+                        {
+                            Add(item.Key, item.Value.ToString(Newtonsoft.Json.Formatting.None));
+                        }
+                        else
+                        {
+                            Add(item.Key, item.Value.ToString());
+                        }
                     }
                 }
             }
diff --git a/src/ICanPay.Core/Gateways/NullGateway.cs b/src/ICanPay.Core/Gateways/NullGateway.cs
index 0658a39..7720751 100644
--- a/src/ICanPay.Core/Gateways/NullGateway.cs
+++ b/src/ICanPay.Core/Gateways/NullGateway.cs
@@ -9,20 +9,11 @@ namespace ICanPay.Core
     /// </summary>
     public class NullGateway : BaseGateway
     {
+        public override string GatewayUrl { get; set; }
 
-        #region 属性
+        protected internal override bool IsSuccessPay { get; }
 
-        public override string GatewayUrl { get; set; } = string.Empty;
-
-        protected internal override bool IsSuccessPay => false;
-
-        protected override bool IsWaitPay => false;
-
-        protected internal override string[] NotifyVerifyParameter => new string[0];
-
-        #endregion
-
-        #region 方法
+        protected internal override string[] NotifyVerifyParameter { get; }
 
         protected internal override async Task<bool> ValidateNotifyAsync()
         {
@@ -34,7 +25,14 @@ namespace ICanPay.Core
             throw new NotImplementedException();
         }
 
-        #endregion
+        protected override string BuildSign(GatewayData gatewayData)
+        {
+            throw new NotImplementedException();
+        }
 
+        protected override bool CheckSign(string data, string sign)
+        {
+            throw new NotImplementedException();
+        }
     }
 }
diff --git a/src/ICanPay.Unionpay/UnionpayGateway.cs b/src/ICanPay.Unionpay/UnionpayGateway.cs
index a69ebe5..016336f 100644
--- a/src/ICanPay.Unionpay/UnionpayGateway.cs
+++ b/src/ICanPay.Unionpay/UnionpayGateway.cs
@@ -43,6 +43,7 @@ namespace ICanPay.Unionpay
             : base(merchant, new GatewayData(StringComparer.Ordinal))
         {
             _merchant = merchant;
+            //TODO:测试同时读取是否有问题
             _merchant.CertId = Util.GetCertId(merchant.CertPath, merchant.CertPwd);
             _merchant.CertKey = Util.GetCertKey(merchant.CertPath, merchant.CertPwd);
             //_merchant.EncryptCertId = Util.GetEncryptCertId();