feat(tenpayv3): 新增境外支付融合钱包退款相关接口

docs/WechatTenpayV3/Advanced_ModelDefinition.md

@@ -476,7 +476,7 @@
 
 ---
 
-### 【附】服务商模式 API 模型命名速查表：
+### 【附】服务商、机构模式 API 模型命名速查表：
 
 注：树形结构与[微信支付开发者文档](https://pay.weixin.qq.com/wiki/doc/apiv3_partner/apis/index.shtml)目录结构保持一致。
 
@@ -1068,6 +1068,117 @@
 
         -   Sub Merchant Modifying：`ModifySubMerchant`
 
+-   Multi-Wallet (For HK)
+
+    -   Quick Pay
+
+        -   Quick Pay：`CreateHKTransactionMicroPay` / `CreateHKPartnerTransactionMicroPay`
+
+        -   Query Order：`GetHKTransactionByOutTradeNumber` / `GetHKTransactionById` / `GetHKPartnerTransactionByOutTradeNumber` / `GetHKPartnerTransactionById`
+
+        -   Refund Application：`CreateHKRefund` / `CreateHKPartnerRefund`
+
+        -   Query Single Refund：`GetHKRefundByOutRefundNumber` / `GetHKRefundById` / `GetHKPartnerRefundByOutRefundNumber` / `GetHKPartnerRefundById`
+
+        -   Downloading Reconciliation：`DownloadHKStatements`
+
+        -   Revoke Order：`ReverseHKTransaction` / `ReverseHKPartnerTransaction`
+
+        -   Downloading Platform Certificate：`QueryCertificates`
+
+        -   Query Fund Settlement Details：`QueryHKSettlements`
+
+
+    -   QR Code Payment
+
+        -   Order Placement：`CreateHKTransactionMicroPay` / `CreateHKPartnerTransactionMicroPay`
+
+        -   Query Order：`GetHKTransactionByOutTradeNumber` / `GetHKTransactionById` / `GetHKPartnerTransactionByOutTradeNumber` / `GetHKPartnerTransactionById`
+
+        -   Refund Application：`CreateHKRefund` / `CreateHKPartnerRefund`
+
+        -   Query Single Refund：`GetHKRefundByOutRefundNumber` / `GetHKRefundById` / `GetHKPartnerRefundByOutRefundNumber` / `GetHKPartnerRefundById`
+
+        -   Downloading Reconciliation：`DownloadHKStatements`
+
+        -   Close Order：`CloseHKTransaction` / `CloseHKPartnerTransaction`
+
+        -   Downloading Platform Certificate：`QueryCertificates`
+
+        -   Query Fund Settlement Details：`QueryHKSettlements`
+
+    -   Mini-Program Payment
+
+        -   Order Placement：`CreateHKTransactionMicroPay` / `CreateHKPartnerTransactionMicroPay`
+
+        -   Query Order：`GetHKTransactionByOutTradeNumber` / `GetHKTransactionById` / `GetHKPartnerTransactionByOutTradeNumber` / `GetHKPartnerTransactionById`
+
+        -   Refund Application：`CreateHKRefund` / `CreateHKPartnerRefund`
+
+        -   Query Single Refund：`GetHKRefundByOutRefundNumber` / `GetHKRefundById` / `GetHKPartnerRefundByOutRefundNumber` / `GetHKPartnerRefundById`
+
+        -   Downloading Reconciliation：`DownloadHKStatements`
+
+        -   Close Order：`CloseHKTransaction` / `CloseHKPartnerTransaction`
+
+        -   Downloading Platform Certificate：`QueryCertificates`
+
+        -   Query Fund Settlement Details：`QueryHKSettlements`
+
+    -   Official Account Payment
+
+        -   Order Placement：`CreateHKTransactionMicroPay` / `CreateHKPartnerTransactionMicroPay`
+
+        -   Query Order：`GetHKTransactionByOutTradeNumber` / `GetHKTransactionById` / `GetHKPartnerTransactionByOutTradeNumber` / `GetHKPartnerTransactionById`
+
+        -   Refund Application：`CreateHKRefund` / `CreateHKPartnerRefund`
+
+        -   Query Single Refund：`GetHKRefundByOutRefundNumber` / `GetHKRefundById` / `GetHKPartnerRefundByOutRefundNumber` / `GetHKPartnerRefundById`
+
+        -   Downloading Reconciliation：`DownloadHKStatements`
+
+        -   Close Order：`CloseHKTransaction` / `CloseHKPartnerTransaction`
+
+        -   Downloading Platform Certificate：`QueryCertificates`
+
+        -   Query Fund Settlement Details：`QueryHKSettlements`
+
+    -   In-App Payment
+
+        -   Order Placement：`CreateHKTransactionMicroPay` / `CreateHKPartnerTransactionMicroPay`
+
+        -   Query Order：`GetHKTransactionByOutTradeNumber` / `GetHKTransactionById` / `GetHKPartnerTransactionByOutTradeNumber` / `GetHKPartnerTransactionById`
+
+        -   Refund Application：`CreateHKRefund` / `CreateHKPartnerRefund`
+
+        -   Query Single Refund：`GetHKRefundByOutRefundNumber` / `GetHKRefundById` / `GetHKPartnerRefundByOutRefundNumber` / `GetHKPartnerRefundById`
+
+        -   Downloading Reconciliation：`DownloadHKStatements`
+
+        -   Close Order：`CloseHKTransaction` / `CloseHKPartnerTransaction`
+
+        -   Downloading Platform Certificate：`QueryCertificates`
+
+        -   Query Fund Settlement Details：`QueryHKSettlements`
+
+    -   H5 Payment
+
+        -   Order Placement：`CreateHKTransactionMicroPay` / `CreateHKPartnerTransactionMicroPay`
+
+        -   Query Order：`GetHKTransactionByOutTradeNumber` / `GetHKTransactionById` / `GetHKPartnerTransactionByOutTradeNumber` / `GetHKPartnerTransactionById`
+
+        -   Refund Application：`CreateHKRefund` / `CreateHKPartnerRefund`
+
+        -   Query Single Refund：`GetHKRefundByOutRefundNumber` / `GetHKRefundById` / `GetHKPartnerRefundByOutRefundNumber` / `GetHKPartnerRefundById`
+
+        -   Downloading Reconciliation：`DownloadHKStatements`
+
+        -   Close Order：`CloseHKTransaction` / `CloseHKPartnerTransaction`
+
+        -   Downloading Platform Certificate：`QueryCertificates`
+
+        -   Query Fund Settlement Details：`QueryHKSettlements`
+
 -   Customs Declaration
 
     -   Customs Declaration：`CreateCustomsOrder`

src/SKIT.FlurlHttpClient.Wechat.TenpayV2/Models/Pay/Settlement/GetPaySettlementResponse.cs

@@ -102,7 +102,7 @@
         /// </summary>
         [Newtonsoft.Json.JsonProperty("pay_net_fee")]
         [System.Text.Json.Serialization.JsonPropertyName("pay_net_fee")]
-        public int PaymentNetFee { get; set; }
+        public int NetFee { get; set; }
 
         /// <summary>
         /// 获取或设置手续费金额（单位：指定货币的最小单位）。

src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Events/HKPartnerRefund/HKPartnerRefundResource.cs

@@ -0,0 +1,98 @@
+using System;
+
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Events
+{
+    /// <summary>
+    /// <para>表示 REFUND.SUCCESS （仅限服务商 For HK）通知的数据。</para>
+    /// <para>表示 REFUND.ABNORMAL （仅限服务商 For HK）通知的数据。</para>
+    /// <para>表示 REFUND.CLOSED （仅限服务商 For HK）通知的数据。</para>
+    /// </summary>
+    public class HKPartnerRefundResource : WechatTenpayEvent.Types.IDecryptedResource
+    {
+        public static class Types
+        {
+            public class Amount : Models.GetHKPartnerRefundByOutRefundNumberResponse.Types.Amount
+            {
+            }
+        }
+
+        /// <summary>
+        /// 获取或设置服务商商户号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("sp_mchid")]
+        [System.Text.Json.Serialization.JsonPropertyName("sp_mchid")]
+        public string MerchantId { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置子商户号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("sub_mchid")]
+        [System.Text.Json.Serialization.JsonPropertyName("sub_mchid")]
+        public string SubMerchantId { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置商户订单号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("out_trade_no")]
+        [System.Text.Json.Serialization.JsonPropertyName("out_trade_no")]
+        public string OutTradeNumber { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置微信支付订单号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("transaction_id")]
+        [System.Text.Json.Serialization.JsonPropertyName("transaction_id")]
+        public string TransactionId { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置商户退款单号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("out_refund_no")]
+        [System.Text.Json.Serialization.JsonPropertyName("out_refund_no")]
+        public string OutRefundNumber { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置微信支付退款号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("refund_id")]
+        [System.Text.Json.Serialization.JsonPropertyName("refund_id")]
+        public string RefundId { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置退款状态。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("refund_status")]
+        [System.Text.Json.Serialization.JsonPropertyName("refund_status")]
+        public string RefundStatus { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置退款入账账户。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("recv_account")]
+        [System.Text.Json.Serialization.JsonPropertyName("recv_account")]
+        public string ReceiveAccount { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置退款资金来源。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("fund_source")]
+        [System.Text.Json.Serialization.JsonPropertyName("fund_source")]
+        public string? FundSource { get; set; }
+
+        /// <summary>
+        /// 获取或设置退款成功时间。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("success_time")]
+        [Newtonsoft.Json.JsonConverter(typeof(Newtonsoft.Json.Converters.RFC3339NullableDateTimeOffsetConverter))]
+        [System.Text.Json.Serialization.JsonPropertyName("success_time")]
+        [System.Text.Json.Serialization.JsonConverter(typeof(System.Text.Json.Converters.RFC3339NullableDateTimeOffsetConverter))]
+        public DateTimeOffset? SuccessTime { get; set; }
+
+        /// <summary>
+        /// 获取或设置退款金额信息。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("amount")]
+        [System.Text.Json.Serialization.JsonPropertyName("amount")]
+        public Types.Amount Amount { get; set; } = default!;
+    }
+}

src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Events/HKRefund/HKRefundResource.cs

@@ -0,0 +1,91 @@
+using System;
+
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Events
+{
+    /// <summary>
+    /// <para>表示 REFUND.SUCCESS （仅限直连商户 For HK）通知的数据。</para>
+    /// <para>表示 REFUND.ABNORMAL （仅限直连商户 For HK）通知的数据。</para>
+    /// <para>表示 REFUND.CLOSED （仅限直连商户 For HK）通知的数据。</para>
+    /// </summary>
+    public class HKRefundResource : WechatTenpayEvent.Types.IDecryptedResource
+    {
+        public static class Types
+        {
+            public class Amount : Models.GetHKRefundByOutRefundNumberResponse.Types.Amount
+            {
+            }
+        }
+
+        /// <summary>
+        /// 获取或设置微信商户号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("mchid")]
+        [System.Text.Json.Serialization.JsonPropertyName("mchid")]
+        public string MerchantId { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置商户订单号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("out_trade_no")]
+        [System.Text.Json.Serialization.JsonPropertyName("out_trade_no")]
+        public string OutTradeNumber { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置微信支付订单号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("transaction_id")]
+        [System.Text.Json.Serialization.JsonPropertyName("transaction_id")]
+        public string TransactionId { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置商户退款单号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("out_refund_no")]
+        [System.Text.Json.Serialization.JsonPropertyName("out_refund_no")]
+        public string OutRefundNumber { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置微信支付退款号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("refund_id")]
+        [System.Text.Json.Serialization.JsonPropertyName("refund_id")]
+        public string RefundId { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置退款状态。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("refund_status")]
+        [System.Text.Json.Serialization.JsonPropertyName("refund_status")]
+        public string RefundStatus { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置退款入账账户。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("recv_account")]
+        [System.Text.Json.Serialization.JsonPropertyName("recv_account")]
+        public string ReceiveAccount { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置退款资金来源。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("fund_source")]
+        [System.Text.Json.Serialization.JsonPropertyName("fund_source")]
+        public string? FundSource { get; set; }
+
+        /// <summary>
+        /// 获取或设置退款成功时间。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("success_time")]
+        [Newtonsoft.Json.JsonConverter(typeof(Newtonsoft.Json.Converters.RFC3339NullableDateTimeOffsetConverter))]
+        [System.Text.Json.Serialization.JsonPropertyName("success_time")]
+        [System.Text.Json.Serialization.JsonConverter(typeof(System.Text.Json.Converters.RFC3339NullableDateTimeOffsetConverter))]
+        public DateTimeOffset? SuccessTime { get; set; }
+
+        /// <summary>
+        /// 获取或设置退款金额信息。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("amount")]
+        [System.Text.Json.Serialization.JsonPropertyName("amount")]
+        public Types.Amount Amount { get; set; } = default!;
+    }
+}

src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Events/PartnerRefund/PartnerRefundResource.cs

@@ -3,9 +3,9 @@
 namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Events
 {
     /// <summary>
-    /// <para>表示 REFUND.SUCCESS （仅服务商）通知的数据。</para>
-    /// <para>表示 REFUND.ABNORMAL （仅服务商）通知的数据。</para>
-    /// <para>表示 REFUND.CLOSED （仅服务商）通知的数据。</para>
+    /// <para>表示 REFUND.SUCCESS （仅限服务商）通知的数据。</para>
+    /// <para>表示 REFUND.ABNORMAL （仅限服务商）通知的数据。</para>
+    /// <para>表示 REFUND.CLOSED （仅限服务商）通知的数据。</para>
     /// </summary>
     public class PartnerRefundResource : WechatTenpayEvent.Types.IDecryptedResource
     {

src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Events/Refund/RefundResource.cs

@@ -3,9 +3,9 @@
 namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Events
 {
     /// <summary>
-    /// <para>表示 REFUND.SUCCESS （仅直连商户）通知的数据。</para>
-    /// <para>表示 REFUND.ABNORMAL （仅直连商户）通知的数据。</para>
-    /// <para>表示 REFUND.CLOSED （仅直连商户）通知的数据。</para>
+    /// <para>表示 REFUND.SUCCESS （仅限直连商户）通知的数据。</para>
+    /// <para>表示 REFUND.ABNORMAL （仅限直连商户）通知的数据。</para>
+    /// <para>表示 REFUND.CLOSED （仅限直连商户）通知的数据。</para>
     /// </summary>
     public class RefundResource : WechatTenpayEvent.Types.IDecryptedResource
     {

src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Extensions/WechatTenpayClientExecuteHKPartnerRefundExtensions.cs

@@ -0,0 +1,103 @@
+using System;
+using System.Net.Http;
+using System.Threading;
+using System.Threading.Tasks;
+using Flurl;
+using Flurl.Http;
+
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3
+{
+    /// <summary>
+    /// 为 <see cref="WechatTenpayClient"/> 提供境外支付退款（For HK）相关的 API 扩展方法。
+    /// </summary>
+    public static class WechatTenpayClientExecuteHKPartnerRefundExtensions
+    {
+        /// <summary>
+        /// <para>异步调用 [POST] /refunds 接口。</para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/In-AppPay/chapter8_2.shtml </para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/H5Payment/chapter8_2.shtml </para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/OfficialPayMent/chapter8_2.shtml </para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/MiniProgramPay/chapter8_2.shtml </para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/NativePay/chapter8_2.shtml </para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/QuickPay/chapter8_2.shtml </para>
+        /// <para><i>（请注意调用此接口需在构造 <see cref="WechatTenpayClient" /> 时指定特殊的 <see cref="WechatTenpayClientOptions.Endpoints"/>。）</i></para>
+        /// </summary>
+        /// <param name="client"></param>
+        /// <param name="request"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public static async Task<Models.CreateHKPartnerRefundResponse> ExecuteCreateHKPartnerRefundAsync(this WechatTenpayClient client, Models.CreateHKPartnerRefundRequest request, CancellationToken cancellationToken = default)
+        {
+            if (client is null) throw new ArgumentNullException(nameof(client));
+            if (request is null) throw new ArgumentNullException(nameof(request));
+
+            if (request.MerchantId == null)
+                request.MerchantId = client.Credentials.MerchantId;
+
+            IFlurlRequest flurlReq = client
+                .CreateRequest(request, HttpMethod.Post, "refunds");
+
+            return await client.SendRequestWithJsonAsync<Models.CreateHKPartnerRefundResponse>(flurlReq, data: request, cancellationToken: cancellationToken);
+        }
+
+        /// <summary>
+        /// <para>异步调用 [GET] /refunds/out-refund-no/{out_refund_no} 接口。</para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/In-AppPay/chapter8_3.shtml </para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/H5Payment/chapter8_3.shtml </para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/OfficialPayMent/chapter8_3.shtml </para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/MiniProgramPay/chapter8_3.shtml </para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/NativePay/chapter8_3.shtml </para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/QuickPay/chapter8_3.shtml </para>
+        /// <para><i>（请注意调用此接口需在构造 <see cref="WechatTenpayClient" /> 时指定特殊的 <see cref="WechatTenpayClientOptions.Endpoints"/>。）</i></para>
+        /// </summary>
+        /// <param name="client"></param>
+        /// <param name="request"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public static async Task<Models.GetHKPartnerRefundByOutRefundNumberResponse> ExecuteGetHKPartnerRefundByOutRefundNumberAsync(this WechatTenpayClient client, Models.GetHKPartnerRefundByOutRefundNumberRequest request, CancellationToken cancellationToken = default)
+        {
+            if (client is null) throw new ArgumentNullException(nameof(client));
+            if (request is null) throw new ArgumentNullException(nameof(request));
+
+            if (request.MerchantId == null)
+                request.MerchantId = client.Credentials.MerchantId;
+
+            IFlurlRequest flurlReq = client
+                .CreateRequest(request, HttpMethod.Get, "refunds", "out-refund-no", request.OutRefundNumber)
+                .SetQueryParam("sp_mchid", request.MerchantId)
+                .SetQueryParam("sub_mchid", request.SubMerchantId);
+
+            return await client.SendRequestWithJsonAsync<Models.GetHKPartnerRefundByOutRefundNumberResponse>(flurlReq, data: request, cancellationToken: cancellationToken);
+        }
+
+        /// <summary>
+        /// <para>异步调用 [GET] /refunds/id/{refund_id} 接口。</para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/In-AppPay/chapter8_3.shtml </para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/H5Payment/chapter8_3.shtml </para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/OfficialPayMent/chapter8_3.shtml </para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/MiniProgramPay/chapter8_3.shtml </para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/NativePay/chapter8_3.shtml </para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/QuickPay/chapter8_3.shtml </para>
+        /// <para><i>（请注意调用此接口需在构造 <see cref="WechatTenpayClient" /> 时指定特殊的 <see cref="WechatTenpayClientOptions.Endpoints"/>。）</i></para>
+        /// </summary>
+        /// <param name="client"></param>
+        /// <param name="request"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public static async Task<Models.GetHKPartnerRefundByIdResponse> ExecuteGetHKPartnerRefundByIdAsync(this WechatTenpayClient client, Models.GetHKPartnerRefundByIdRequest request, CancellationToken cancellationToken = default)
+        {
+            if (client is null) throw new ArgumentNullException(nameof(client));
+            if (request is null) throw new ArgumentNullException(nameof(request));
+
+            if (request.MerchantId == null)
+                request.MerchantId = client.Credentials.MerchantId;
+
+            IFlurlRequest flurlReq = client
+                .CreateRequest(request, HttpMethod.Get, "refunds", "id", request.RefundId)
+                .SetQueryParam("sp_mchid", request.MerchantId)
+                .SetQueryParam("sub_mchid", request.SubMerchantId);
+
+            return await client.SendRequestWithJsonAsync<Models.GetHKPartnerRefundByIdResponse>(flurlReq, data: request, cancellationToken: cancellationToken);
+        }
+    }
+}

src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Extensions/WechatTenpayClientExecuteHKRefundExtensions.cs

@@ -0,0 +1,101 @@
+using System;
+using System.Net.Http;
+using System.Threading;
+using System.Threading.Tasks;
+using Flurl;
+using Flurl.Http;
+
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3
+{
+    /// <summary>
+    /// 为 <see cref="WechatTenpayClient"/> 提供境外支付退款（For HK）相关的 API 扩展方法。
+    /// </summary>
+    public static class WechatTenpayClientExecuteHKRefundExtensions
+    {
+        /// <summary>
+        /// <para>异步调用 [POST] /refunds 接口。</para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/In-AppPay/chapter8_2.shtml </para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/H5Payment/chapter8_2.shtml </para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/OfficialPayMent/chapter8_2.shtml </para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/MiniProgramPay/chapter8_2.shtml </para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/NativePay/chapter8_2.shtml </para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/QuickPay/chapter8_2.shtml </para>
+        /// <para><i>（请注意调用此接口需在构造 <see cref="WechatTenpayClient" /> 时指定特殊的 <see cref="WechatTenpayClientOptions.Endpoints"/>。）</i></para>
+        /// </summary>
+        /// <param name="client"></param>
+        /// <param name="request"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public static async Task<Models.CreateHKRefundResponse> ExecuteCreateHKRefundAsync(this WechatTenpayClient client, Models.CreateHKRefundRequest request, CancellationToken cancellationToken = default)
+        {
+            if (client is null) throw new ArgumentNullException(nameof(client));
+            if (request is null) throw new ArgumentNullException(nameof(request));
+
+            if (request.MerchantId == null)
+                request.MerchantId = client.Credentials.MerchantId;
+
+            IFlurlRequest flurlReq = client
+                .CreateRequest(request, HttpMethod.Post, "refunds");
+
+            return await client.SendRequestWithJsonAsync<Models.CreateHKRefundResponse>(flurlReq, data: request, cancellationToken: cancellationToken);
+        }
+
+        /// <summary>
+        /// <para>异步调用 [GET] /refunds/out-refund-no/{out_refund_no} 接口。</para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/In-AppPay/chapter8_3.shtml </para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/H5Payment/chapter8_3.shtml </para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/OfficialPayMent/chapter8_3.shtml </para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/MiniProgramPay/chapter8_3.shtml </para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/NativePay/chapter8_3.shtml </para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/QuickPay/chapter8_3.shtml </para>
+        /// <para><i>（请注意调用此接口需在构造 <see cref="WechatTenpayClient" /> 时指定特殊的 <see cref="WechatTenpayClientOptions.Endpoints"/>。）</i></para>
+        /// </summary>
+        /// <param name="client"></param>
+        /// <param name="request"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public static async Task<Models.GetHKRefundByOutRefundNumberResponse> ExecuteGetHKRefundByOutRefundNumberAsync(this WechatTenpayClient client, Models.GetHKRefundByOutRefundNumberRequest request, CancellationToken cancellationToken = default)
+        {
+            if (client is null) throw new ArgumentNullException(nameof(client));
+            if (request is null) throw new ArgumentNullException(nameof(request));
+
+            if (request.MerchantId == null)
+                request.MerchantId = client.Credentials.MerchantId;
+
+            IFlurlRequest flurlReq = client
+                .CreateRequest(request, HttpMethod.Get, "refunds", "out-refund-no", request.OutRefundNumber)
+                .SetQueryParam("mchid", request.MerchantId);
+
+            return await client.SendRequestWithJsonAsync<Models.GetHKRefundByOutRefundNumberResponse>(flurlReq, data: request, cancellationToken: cancellationToken);
+        }
+
+        /// <summary>
+        /// <para>异步调用 [GET] /refunds/id/{refund_id} 接口。</para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/In-AppPay/chapter8_3.shtml </para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/H5Payment/chapter8_3.shtml </para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/OfficialPayMent/chapter8_3.shtml </para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/MiniProgramPay/chapter8_3.shtml </para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/NativePay/chapter8_3.shtml </para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/fusion_wallet/QuickPay/chapter8_3.shtml </para>
+        /// <para><i>（请注意调用此接口需在构造 <see cref="WechatTenpayClient" /> 时指定特殊的 <see cref="WechatTenpayClientOptions.Endpoints"/>。）</i></para>
+        /// </summary>
+        /// <param name="client"></param>
+        /// <param name="request"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public static async Task<Models.GetHKRefundByIdResponse> ExecuteGetHKRefundByIdAsync(this WechatTenpayClient client, Models.GetHKRefundByIdRequest request, CancellationToken cancellationToken = default)
+        {
+            if (client is null) throw new ArgumentNullException(nameof(client));
+            if (request is null) throw new ArgumentNullException(nameof(request));
+
+            if (request.MerchantId == null)
+                request.MerchantId = client.Credentials.MerchantId;
+
+            IFlurlRequest flurlReq = client
+                .CreateRequest(request, HttpMethod.Get, "refunds", "id", request.RefundId)
+                .SetQueryParam("mchid", request.MerchantId);
+
+            return await client.SendRequestWithJsonAsync<Models.GetHKRefundByIdResponse>(flurlReq, data: request, cancellationToken: cancellationToken);
+        }
+    }
+}

src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/HKPartnerRefund/CreateHKPartnerRefundRequest.cs

@@ -0,0 +1,92 @@
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
+{
+    /// <summary>
+    /// <para>表示 [POST] /refunds 接口的请求。</para>
+    /// </summary>
+    public class CreateHKPartnerRefundRequest : WechatTenpayRequest
+    {
+        public static class Types
+        {
+            public class Amount : CreateHKRefundRequest.Types.Amount
+            {
+            }
+        }
+
+        /// <summary>
+        /// 获取或设置微信商户号。如果不指定将使用构造 <see cref="WechatTenpayClient"/> 时的 <see cref="WechatTenpayClientOptions.MerchantId"/> 参数。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("sp_mchid")]
+        [System.Text.Json.Serialization.JsonPropertyName("sp_mchid")]
+        public string? MerchantId { get; set; }
+
+        /// <summary>
+        /// 获取或设置微信 AppId。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("sp_appid")]
+        [System.Text.Json.Serialization.JsonPropertyName("sp_appid")]
+        public string? AppId { get; set; }
+
+        /// <summary>
+        /// 获取或设置子商户号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("sub_mchid")]
+        [System.Text.Json.Serialization.JsonPropertyName("sub_mchid")]
+        public string SubMerchantId { get; set; } = string.Empty;
+
+        /// <summary>
+        /// 获取或设置子商户 AppId。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("sub_appid")]
+        [System.Text.Json.Serialization.JsonPropertyName("sub_appid")]
+        public string? SubAppId { get; set; }
+
+        /// <summary>
+        /// 获取或设置商户订单号。与字段 <see cref="OutTradeNumber"/> 二选一。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("transaction_id")]
+        [System.Text.Json.Serialization.JsonPropertyName("transaction_id")]
+        public string? TransactionId { get; set; }
+
+        /// <summary>
+        /// 获取或设置商户订单号。与字段 <see cref="TransactionId"/> 二选一。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("out_trade_no")]
+        [System.Text.Json.Serialization.JsonPropertyName("out_trade_no")]
+        public string? OutTradeNumber { get; set; }
+
+        /// <summary>
+        /// 获取或设置商户退款单号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("out_refund_no")]
+        [System.Text.Json.Serialization.JsonPropertyName("out_refund_no")]
+        public string OutRefundNumber { get; set; } = string.Empty;
+
+        /// <summary>
+        /// 获取或设置退款原因。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("reason")]
+        [System.Text.Json.Serialization.JsonPropertyName("reason")]
+        public string? Reason { get; set; }
+
+        /// <summary>
+        /// 获取或设置回调通知地址。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("notify_url")]
+        [System.Text.Json.Serialization.JsonPropertyName("notify_url")]
+        public string? NotifyUrl { get; set; }
+
+        /// <summary>
+        /// 获取或设置退款金额信息。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("amount")]
+        [System.Text.Json.Serialization.JsonPropertyName("amount")]
+        public Types.Amount Amount { get; set; } = new Types.Amount();
+
+        /// <summary>
+        /// 获取或设置退款资金来源。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("source")]
+        [System.Text.Json.Serialization.JsonPropertyName("source")]
+        public string? FundSource { get; set; }
+    }
+}

src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/HKPartnerRefund/CreateHKPartnerRefundResponse.cs

@@ -0,0 +1,9 @@
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
+{
+    /// <summary>
+    /// <para>表示 [POST] /refunds 接口的响应。</para>
+    /// </summary>
+    public class CreateHKPartnerRefundResponse : GetHKPartnerRefundByOutRefundNumberResponse
+    {
+    }
+}

src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/HKPartnerRefund/GetHKPartnerRefundByIdRequest.cs

@@ -0,0 +1,29 @@
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
+{
+    /// <summary>
+    /// <para>表示 [GET] /refunds/id/{refund_id} 接口的请求。</para>
+    /// </summary>
+    public class GetHKPartnerRefundByIdRequest : WechatTenpayRequest
+    {
+        /// <summary>
+        /// 获取或设置微信商户号。如果不指定将使用构造 <see cref="WechatTenpayClient"/> 时的 <see cref="WechatTenpayClientOptions.MerchantId"/> 参数。
+        /// </summary>
+        [Newtonsoft.Json.JsonIgnore]
+        [System.Text.Json.Serialization.JsonIgnore]
+        public string? MerchantId { get; set; }
+
+        /// <summary>
+        /// 获取或设置子商户号。
+        /// </summary>
+        [Newtonsoft.Json.JsonIgnore]
+        [System.Text.Json.Serialization.JsonIgnore]
+        public string SubMerchantId { get; set; } = string.Empty;
+
+        /// <summary>
+        /// 获取或设置微信支付退款单号。
+        /// </summary>
+        [Newtonsoft.Json.JsonIgnore]
+        [System.Text.Json.Serialization.JsonIgnore]
+        public string RefundId { get; set; } = string.Empty;
+    }
+}

src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/HKPartnerRefund/GetHKPartnerRefundByIdResponse.cs

@@ -0,0 +1,9 @@
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
+{
+    /// <summary>
+    /// <para>表示 [GET] /refunds/id/{refund_id} 接口的响应。</para>
+    /// </summary>
+    public class GetHKPartnerRefundByIdResponse : GetHKPartnerRefundByOutRefundNumberResponse
+    {
+    }
+}

src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/HKPartnerRefund/GetHKPartnerRefundByOutRefundNumberRequest.cs

@@ -0,0 +1,29 @@
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
+{
+    /// <summary>
+    /// <para>表示 [GET] /refunds/out-refund-no/{out_refund_no} 接口的请求。</para>
+    /// </summary>
+    public class GetHKPartnerRefundByOutRefundNumberRequest : WechatTenpayRequest
+    {
+        /// <summary>
+        /// 获取或设置微信商户号。如果不指定将使用构造 <see cref="WechatTenpayClient"/> 时的 <see cref="WechatTenpayClientOptions.MerchantId"/> 参数。
+        /// </summary>
+        [Newtonsoft.Json.JsonIgnore]
+        [System.Text.Json.Serialization.JsonIgnore]
+        public string? MerchantId { get; set; }
+
+        /// <summary>
+        /// 获取或设置子商户号。
+        /// </summary>
+        [Newtonsoft.Json.JsonIgnore]
+        [System.Text.Json.Serialization.JsonIgnore]
+        public string SubMerchantId { get; set; } = string.Empty;
+
+        /// <summary>
+        /// 获取或设置微信支付订单号。
+        /// </summary>
+        [Newtonsoft.Json.JsonIgnore]
+        [System.Text.Json.Serialization.JsonIgnore]
+        public string OutRefundNumber { get; set; } = string.Empty;
+    }
+}

src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/HKPartnerRefund/GetHKPartnerRefundByOutRefundNumberResponse.cs

@@ -0,0 +1,109 @@
+using System;
+
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
+{
+    /// <summary>
+    /// <para>表示 [GET] /refunds/out-refund-no/{out_refund_no} 接口的响应。</para>
+    /// </summary>
+    public class GetHKPartnerRefundByOutRefundNumberResponse : WechatTenpayResponse
+    {
+        public static class Types
+        {
+            public class Amount : GetHKRefundByOutRefundNumberResponse.Types.Amount
+            {
+            }
+
+            public class Promotion : GetHKRefundByOutRefundNumberResponse.Types.Promotion
+            {
+            }
+        }
+
+        /// <summary>
+        /// 获取或设置微信支付退款单号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("id")]
+        [System.Text.Json.Serialization.JsonPropertyName("id")]
+        public string RefundId { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置商户退款单号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("out_refund_no")]
+        [System.Text.Json.Serialization.JsonPropertyName("out_refund_no")]
+        public string OutRefundNumber { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置微信支付订单号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("transaction_id")]
+        [System.Text.Json.Serialization.JsonPropertyName("transaction_id")]
+        public string TransactionId { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置商户订单号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("out_trade_no")]
+        [System.Text.Json.Serialization.JsonPropertyName("out_trade_no")]
+        public string OutTradeNumber { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置退款渠道。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("channel")]
+        [System.Text.Json.Serialization.JsonPropertyName("channel")]
+        public string Channel { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置退款资金来源。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("fund_source")]
+        [System.Text.Json.Serialization.JsonPropertyName("fund_source")]
+        public string FundSource { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置退款入账账户。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("recv_account")]
+        [System.Text.Json.Serialization.JsonPropertyName("recv_account")]
+        public string ReceiveAccount { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置退款状态。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("status")]
+        [System.Text.Json.Serialization.JsonPropertyName("status")]
+        public string Status { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置退款成功时间。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("success_time")]
+        [Newtonsoft.Json.JsonConverter(typeof(Newtonsoft.Json.Converters.RFC3339NullableDateTimeOffsetConverter))]
+        [System.Text.Json.Serialization.JsonPropertyName("success_time")]
+        [System.Text.Json.Serialization.JsonConverter(typeof(System.Text.Json.Converters.RFC3339NullableDateTimeOffsetConverter))]
+        public DateTimeOffset? SuccessTime { get; set; }
+
+        /// <summary>
+        /// 获取或设置退款创建时间。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("create_time")]
+        [Newtonsoft.Json.JsonConverter(typeof(Newtonsoft.Json.Converters.RFC3339DateTimeOffsetConverter))]
+        [System.Text.Json.Serialization.JsonPropertyName("create_time")]
+        [System.Text.Json.Serialization.JsonConverter(typeof(System.Text.Json.Converters.RFC3339DateTimeOffsetConverter))]
+        public DateTimeOffset CreateTime { get; set; }
+
+        /// <summary>
+        /// 获取或设置退款金额信息。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("amount")]
+        [System.Text.Json.Serialization.JsonPropertyName("amount")]
+        public Types.Amount Amount { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置优惠退款信息。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("promotion_detail")]
+        [System.Text.Json.Serialization.JsonPropertyName("promotion_detail")]
+        public Types.Promotion[]? PromotionList { get; set; }
+    }
+}

src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/HKPartnerTransactions/Settlements/QueryHKSettlementsResponse.cs

@@ -18,14 +18,14 @@
                         /// </summary>
                         [Newtonsoft.Json.JsonProperty("settled")]
                         [System.Text.Json.Serialization.JsonPropertyName("settled")]
-                        public int SettledAmount { get; set; }
+                        public int Settled { get; set; }
 
                         /// <summary>
                         /// 获取或设置未划账金额（单位：指定货币的最小单位）。
                         /// </summary>
                         [Newtonsoft.Json.JsonProperty("unsettle")]
                         [System.Text.Json.Serialization.JsonPropertyName("unsettle")]
-                        public int UnsettledAmount { get; set; }
+                        public int Unsettled { get; set; }
 
                         /// <summary>
                         /// 获取或设置结算币种。
@@ -39,21 +39,21 @@
                         /// </summary>
                         [Newtonsoft.Json.JsonProperty("pay")]
                         [System.Text.Json.Serialization.JsonPropertyName("pay")]
-                        public int PayAmount { get; set; }
+                        public int Payment { get; set; }
 
                         /// <summary>
                         /// 获取或设置该结算周期内退款总金额（单位：指定货币的最小单位）。
                         /// </summary>
                         [Newtonsoft.Json.JsonProperty("refund")]
                         [System.Text.Json.Serialization.JsonPropertyName("refund")]
-                        public int RefundAmount { get; set; }
+                        public int Refund { get; set; }
 
                         /// <summary>
                         /// 获取或设置该结算周期交易与退款总金额之差（单位：指定货币的最小单位）。
                         /// </summary>
                         [Newtonsoft.Json.JsonProperty("net")]
                         [System.Text.Json.Serialization.JsonPropertyName("net")]
-                        public int NetAmount { get; set; }
+                        public int Net { get; set; }
 
                         /// <summary>
                         /// 获取或设置手续费金额（单位：指定货币的最小单位）。

src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/HKRefund/CreateHKRefundRequest.cs

@@ -0,0 +1,99 @@
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
+{
+    /// <summary>
+    /// <para>表示 [POST] /refunds 接口的请求。</para>
+    /// </summary>
+    public class CreateHKRefundRequest : WechatTenpayRequest
+    {
+        public static class Types
+        {
+            public class Amount
+            {
+                /// <summary>
+                /// 获取或设置原订单金额（单位：指定货币的最小单位）。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("total")]
+                [System.Text.Json.Serialization.JsonPropertyName("total")]
+                public int Total { get; set; }
+
+                /// <summary>
+                /// 获取或设置退款金额（单位：指定货币的最小单位）。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("refund")]
+                [System.Text.Json.Serialization.JsonPropertyName("refund")]
+                public int Refund { get; set; }
+
+                /// <summary>
+                /// 获取或设置退款币种。
+                /// <para>默认值：HKD</para>
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("currency")]
+                [System.Text.Json.Serialization.JsonPropertyName("currency")]
+                public string Currency { get; set; } = "HKD";
+            }
+        }
+
+        /// <summary>
+        /// 获取或设置微信商户号。如果不指定将使用构造 <see cref="WechatTenpayClient"/> 时的 <see cref="WechatTenpayClientOptions.MerchantId"/> 参数。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("mchid")]
+        [System.Text.Json.Serialization.JsonPropertyName("mchid")]
+        public string? MerchantId { get; set; }
+
+        /// <summary>
+        /// 获取或设置微信 AppId。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("appid")]
+        [System.Text.Json.Serialization.JsonPropertyName("appid")]
+        public string? AppId { get; set; }
+
+        /// <summary>
+        /// 获取或设置商户订单号。与字段 <see cref="OutTradeNumber"/> 二选一。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("transaction_id")]
+        [System.Text.Json.Serialization.JsonPropertyName("transaction_id")]
+        public string? TransactionId { get; set; }
+
+        /// <summary>
+        /// 获取或设置商户订单号。与字段 <see cref="TransactionId"/> 二选一。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("out_trade_no")]
+        [System.Text.Json.Serialization.JsonPropertyName("out_trade_no")]
+        public string? OutTradeNumber { get; set; }
+
+        /// <summary>
+        /// 获取或设置商户退款单号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("out_refund_no")]
+        [System.Text.Json.Serialization.JsonPropertyName("out_refund_no")]
+        public string OutRefundNumber { get; set; } = string.Empty;
+
+        /// <summary>
+        /// 获取或设置退款原因。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("reason")]
+        [System.Text.Json.Serialization.JsonPropertyName("reason")]
+        public string? Reason { get; set; }
+
+        /// <summary>
+        /// 获取或设置回调通知地址。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("notify_url")]
+        [System.Text.Json.Serialization.JsonPropertyName("notify_url")]
+        public string? NotifyUrl { get; set; }
+
+        /// <summary>
+        /// 获取或设置退款金额信息。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("amount")]
+        [System.Text.Json.Serialization.JsonPropertyName("amount")]
+        public Types.Amount Amount { get; set; } = new Types.Amount();
+
+        /// <summary>
+        /// 获取或设置退款资金来源。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("source")]
+        [System.Text.Json.Serialization.JsonPropertyName("source")]
+        public string? FundSource { get; set; }
+    }
+}

src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/HKRefund/CreateHKRefundResponse.cs

@@ -0,0 +1,9 @@
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
+{
+    /// <summary>
+    /// <para>表示 [POST] /refunds 接口的响应。</para>
+    /// </summary>
+    public class CreateHKRefundResponse : GetHKRefundByOutRefundNumberResponse
+    {
+    }
+}

src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/HKRefund/GetHKRefundByIdRequest.cs

@@ -0,0 +1,22 @@
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
+{
+    /// <summary>
+    /// <para>表示 [GET] /refunds/id/{refund_id} 接口的请求。</para>
+    /// </summary>
+    public class GetHKRefundByIdRequest : WechatTenpayRequest
+    {
+        /// <summary>
+        /// 获取或设置微信商户号。如果不指定将使用构造 <see cref="WechatTenpayClient"/> 时的 <see cref="WechatTenpayClientOptions.MerchantId"/> 参数。
+        /// </summary>
+        [Newtonsoft.Json.JsonIgnore]
+        [System.Text.Json.Serialization.JsonIgnore]
+        public string? MerchantId { get; set; }
+
+        /// <summary>
+        /// 获取或设置微信支付退款单号。
+        /// </summary>
+        [Newtonsoft.Json.JsonIgnore]
+        [System.Text.Json.Serialization.JsonIgnore]
+        public string RefundId { get; set; } = string.Empty;
+    }
+}

src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/HKRefund/GetHKRefundByIdResponse.cs

@@ -0,0 +1,9 @@
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
+{
+    /// <summary>
+    /// <para>表示 [GET] /refunds/id/{refund_id} 接口的响应。</para>
+    /// </summary>
+    public class GetHKRefundByIdResponse : GetHKRefundByOutRefundNumberResponse
+    {
+    }
+}

src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/HKRefund/GetHKRefundByOutRefundNumberRequest.cs

@@ -0,0 +1,22 @@
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
+{
+    /// <summary>
+    /// <para>表示 [GET] /refunds/out-refund-no/{out_refund_no} 接口的请求。</para>
+    /// </summary>
+    public class GetHKRefundByOutRefundNumberRequest : WechatTenpayRequest
+    {
+        /// <summary>
+        /// 获取或设置微信商户号。如果不指定将使用构造 <see cref="WechatTenpayClient"/> 时的 <see cref="WechatTenpayClientOptions.MerchantId"/> 参数。
+        /// </summary>
+        [Newtonsoft.Json.JsonIgnore]
+        [System.Text.Json.Serialization.JsonIgnore]
+        public string? MerchantId { get; set; }
+
+        /// <summary>
+        /// 获取或设置微信支付订单号。
+        /// </summary>
+        [Newtonsoft.Json.JsonIgnore]
+        [System.Text.Json.Serialization.JsonIgnore]
+        public string OutRefundNumber { get; set; } = string.Empty;
+    }
+}

src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/HKRefund/GetHKRefundByOutRefundNumberResponse.cs

@@ -0,0 +1,212 @@
+using System;
+
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
+{
+    /// <summary>
+    /// <para>表示 [GET] /refunds/out-refund-no/{out_refund_no} 接口的响应。</para>
+    /// </summary>
+    public class GetHKRefundByOutRefundNumberResponse : WechatTenpayResponse
+    {
+        public static class Types
+        {
+            public class Amount
+            {
+                public static class Types
+                {
+                    public class ExchangeRate : GetHKTransactionByOutTradeNumberResponse.Types.Amount.Types.ExchangeRate
+                    {
+                    }
+                }
+
+                /// <summary>
+                /// 获取或设置原订单金额（单位：指定货币的最小单位）。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("total")]
+                [System.Text.Json.Serialization.JsonPropertyName("total")]
+                public int? Total { get; set; }
+
+                /// <summary>
+                /// 获取或设置退款金额（单位：指定货币的最小单位）。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("refund")]
+                [System.Text.Json.Serialization.JsonPropertyName("refund")]
+                public int Refund { get; set; }
+
+                /// <summary>
+                /// 获取或设置退款币种。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("currency")]
+                [System.Text.Json.Serialization.JsonPropertyName("currency")]
+                public string? Currency { get; set; }
+
+                /// <summary>
+                /// 获取或设置用户支付金额（单位：指定货币的最小单位）。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("payer_total")]
+                [System.Text.Json.Serialization.JsonPropertyName("payer_total")]
+                public int PayerTotal { get; set; }
+
+                /// <summary>
+                /// 获取或设置用户退款金额（单位：指定货币的最小单位）。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("payer_refund")]
+                [System.Text.Json.Serialization.JsonPropertyName("payer_refund")]
+                public int PayerRefund { get; set; }
+
+                /// <summary>
+                /// 获取或设置用户支付币种。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("payer_currency")]
+                [System.Text.Json.Serialization.JsonPropertyName("payer_currency")]
+                public string PayerCurrency { get; set; } = default!;
+
+                /// <summary>
+                /// 获取或设置汇率信息。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("exchange_rate")]
+                [System.Text.Json.Serialization.JsonPropertyName("exchange_rate")]
+                public Types.ExchangeRate? ExchangeRate { get; set; }
+            }
+
+            public class Promotion
+            {
+                /// <summary>
+                /// 获取或设置券 ID。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("promotion_id")]
+                [System.Text.Json.Serialization.JsonPropertyName("promotion_id")]
+                public string PromotionId { get; set; } = default!;
+
+                /// <summary>
+                /// 获取或设置优惠名称。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("name")]
+                [System.Text.Json.Serialization.JsonPropertyName("name")]
+                public string? Name { get; set; }
+
+                /// <summary>
+                /// 获取或设置优惠范围。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("scope")]
+                [System.Text.Json.Serialization.JsonPropertyName("scope")]
+                public string? Scope { get; set; }
+
+                /// <summary>
+                /// 获取或设置优惠类型。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("type")]
+                [System.Text.Json.Serialization.JsonPropertyName("type")]
+                public string? Type { get; set; }
+
+                /// <summary>
+                /// 获取或设置优惠券面额（单位：指定货币的最小单位）。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("amount")]
+                [System.Text.Json.Serialization.JsonPropertyName("amount")]
+                public int Amount { get; set; }
+
+                /// <summary>
+                /// 获取或设置优惠券退款金额（单位：指定货币的最小单位）。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("refund_amount")]
+                [System.Text.Json.Serialization.JsonPropertyName("refund_amount")]
+                public int? RefundAmount { get; set; }
+
+                /// <summary>
+                /// 获取或设置优惠币种。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("currency")]
+                [System.Text.Json.Serialization.JsonPropertyName("currency")]
+                public string? Currency { get; set; }
+            }
+        }
+
+        /// <summary>
+        /// 获取或设置微信支付退款单号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("id")]
+        [System.Text.Json.Serialization.JsonPropertyName("id")]
+        public string RefundId { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置商户退款单号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("out_refund_no")]
+        [System.Text.Json.Serialization.JsonPropertyName("out_refund_no")]
+        public string OutRefundNumber { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置微信支付订单号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("transaction_id")]
+        [System.Text.Json.Serialization.JsonPropertyName("transaction_id")]
+        public string TransactionId { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置商户订单号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("out_trade_no")]
+        [System.Text.Json.Serialization.JsonPropertyName("out_trade_no")]
+        public string OutTradeNumber { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置退款渠道。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("channel")]
+        [System.Text.Json.Serialization.JsonPropertyName("channel")]
+        public string Channel { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置退款资金来源。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("fund_source")]
+        [System.Text.Json.Serialization.JsonPropertyName("fund_source")]
+        public string FundSource { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置退款入账账户。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("recv_account")]
+        [System.Text.Json.Serialization.JsonPropertyName("recv_account")]
+        public string ReceiveAccount { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置退款状态。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("status")]
+        [System.Text.Json.Serialization.JsonPropertyName("status")]
+        public string Status { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置退款成功时间。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("success_time")]
+        [Newtonsoft.Json.JsonConverter(typeof(Newtonsoft.Json.Converters.RFC3339NullableDateTimeOffsetConverter))]
+        [System.Text.Json.Serialization.JsonPropertyName("success_time")]
+        [System.Text.Json.Serialization.JsonConverter(typeof(System.Text.Json.Converters.RFC3339NullableDateTimeOffsetConverter))]
+        public DateTimeOffset? SuccessTime { get; set; }
+
+        /// <summary>
+        /// 获取或设置退款创建时间。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("create_time")]
+        [Newtonsoft.Json.JsonConverter(typeof(Newtonsoft.Json.Converters.RFC3339DateTimeOffsetConverter))]
+        [System.Text.Json.Serialization.JsonPropertyName("create_time")]
+        [System.Text.Json.Serialization.JsonConverter(typeof(System.Text.Json.Converters.RFC3339DateTimeOffsetConverter))]
+        public DateTimeOffset CreateTime { get; set; }
+
+        /// <summary>
+        /// 获取或设置退款金额信息。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("amount")]
+        [System.Text.Json.Serialization.JsonPropertyName("amount")]
+        public Types.Amount Amount { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置优惠退款信息。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("promotion_detail")]
+        [System.Text.Json.Serialization.JsonPropertyName("promotion_detail")]
+        public Types.Promotion[]? PromotionList { get; set; }
+    }
+}

src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/HKTransactions/GetHKTransactionByOutTradeNumberResponse.cs

@@ -122,6 +122,13 @@ namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
                 [System.Text.Json.Serialization.JsonPropertyName("amount")]
                 public int Amount { get; set; }
 
+                /// <summary>
+                /// 获取或设置优惠券退款金额（单位：指定货币的最小单位）。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("refund_amount")]
+                [System.Text.Json.Serialization.JsonPropertyName("refund_amount")]
+                public int? RefundAmount { get; set; }
+
                 /// <summary>
                 /// 获取或设置活动 ID。
                 /// </summary>

src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/Refund/GetRefundDomesticRefundByOutRefundNumberResponse.cs

@@ -232,6 +232,20 @@ namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
         [System.Text.Json.Serialization.JsonPropertyName("user_received_account")]
         public string UserReceivedAccount { get; set; } = default!;
 
+        /// <summary>
+        /// 获取或设置退款资金来源。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("funds_account")]
+        [System.Text.Json.Serialization.JsonPropertyName("funds_account")]
+        public string FundsAccount { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置退款状态。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("status")]
+        [System.Text.Json.Serialization.JsonPropertyName("status")]
+        public string Status { get; set; } = default!;
+
         /// <summary>
         /// 获取或设置退款成功时间。
         /// </summary>
@@ -250,20 +264,6 @@ namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
         [System.Text.Json.Serialization.JsonConverter(typeof(System.Text.Json.Converters.RFC3339DateTimeOffsetConverter))]
         public DateTimeOffset CreateTime { get; set; }
 
-        /// <summary>
-        /// 获取或设置退款状态。
-        /// </summary>
-        [Newtonsoft.Json.JsonProperty("status")]
-        [System.Text.Json.Serialization.JsonPropertyName("status")]
-        public string Status { get; set; } = default!;
-
-        /// <summary>
-        /// 获取或设置退款资金来源。
-        /// </summary>
-        [Newtonsoft.Json.JsonProperty("funds_account")]
-        [System.Text.Json.Serialization.JsonPropertyName("funds_account")]
-        public string FundsAccount { get; set; } = default!;
-
         /// <summary>
         /// 获取或设置退款金额信息。
         /// </summary>

test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/EventSamples/HKPartnerRefund/HKPartnerRefundResource.json

@@ -0,0 +1,24 @@
+{
+    "sp_mchid": "1900000100",
+    "sub_mchid": "1900000109",
+    "transaction_id": "1008450740201411110005820873",
+    "out_trade_no": "20150806125346",
+    "refund_id": "50200207182018070300011301001",
+    "out_refund_no": "7752501201407033233368018",
+    "refund_status": "SUCCESS",
+    "success_time": "2018-06-08T10:34:56+08:00",
+    "recv_account": "招商银行信用卡0403",
+    "fund_source": "REFUND_SOURCE_UNSETTLED_FUNDS",
+    "amount": {
+        "total": 528800,
+        "currency": "HKD",
+        "refund": 528800,
+        "payer_total": 528800,
+        "payer_refund": 528800,
+        "payer_currency": "HKD",
+        "exchange_rate": {
+            "type": "SETTLEMENT_RATE",
+            "rate": 100000000
+        }
+    }
+}

test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/EventSamples/HKRefund/HKRefundResource.json

@@ -0,0 +1,23 @@
+{
+    "mchid": "1900000100",
+    "transaction_id": "1008450740201411110005820873",
+    "out_trade_no": "20150806125346",
+    "refund_id": "50200207182018070300011301001",
+    "out_refund_no": "7752501201407033233368018",
+    "refund_status": "SUCCESS",
+    "success_time": "2018-06-08T10:34:56+08:00",
+    "recv_account": "招商银行信用卡0403",
+    "fund_source": "REFUND_SOURCE_UNSETTLED_FUNDS",
+    "amount": {
+        "total": 528800,
+        "currency": "HKD",
+        "refund": 528800,
+        "payer_total": 528800,
+        "payer_refund": 528800,
+        "payer_currency": "HKD",
+        "exchange_rate": {
+            "type": "SETTLEMENT_RATE",
+            "rate": 100000000
+        }
+    }
+}

test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/HKPartnerRefund/CreateHKPartnerRefundRequest.json

@@ -0,0 +1,15 @@
+{
+    "sp_appid": "wx2421b1c4370ec43b",
+    "sub_appid": "1900000109",
+    "sp_mchid": "10000100",
+    "sub_mchid": "20000100",
+    "transaction_id": "1008450740201411110005820873",
+    "out_refund_no": "R20150806125346",
+    "amount": {
+        "refund": 50,
+        "total": 100,
+        "currency": "HKD"
+    },
+    "reason": "商品已售完",
+    "source": "REFUND_SOURCE_UNSETTLED_FUNDS"
+}

test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/HKPartnerRefund/CreateHKPartnerRefundResponse.json

@@ -0,0 +1,25 @@
+{
+    "id": "2008450740201411110000174436",
+    "out_refund_no": "R20150806125346",
+    "create_time": "2018-06-08T10:34:56+08:00",
+    "amount": {
+        "refund": 50,
+        "currency": "CNY",
+        "payer_refund": 49,
+        "payer_currency": "HKD",
+        "exchange_rate": {
+            "type": "SETTLEMENT_RATE",
+            "rate": 8000000
+        }
+    },
+    "promotion_detail": [
+        {
+            "promotion_id": "109519",
+            "scope": "GLOBAL",
+            "type": "COUPON",
+            "amount": 1,
+            "refund_amount": 1,
+            "currency": "HKD"
+        }
+    ]
+}

test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/HKPartnerRefund/GetHKPartnerRefundByIdResponse.json

@@ -0,0 +1,32 @@
+{
+    "id": "2008450740201411110000174436",
+    "out_refund_no": "R20150806125346",
+    "transaction_id": "1008450740201411110005820873",
+    "out_trade_no": "20150806125346",
+    "amount": {
+        "refund": 50,
+        "currency": "CNY",
+        "payer_refund": 49,
+        "payer_currency": "HKD",
+        "exchange_rate": {
+            "type": "SETTLEMENT_RATE",
+            "rate": 8000000
+        }
+    },
+    "promotion_detail": [
+        {
+            "promotion_id": "109519",
+            "scope": "GLOBAL",
+            "type": "COUPON",
+            "amount": 1,
+            "refund_amount": 1,
+            "currency": "HKD"
+        }
+    ],
+    "channel": "ORIGINAL",
+    "status": "SUCCESS",
+    "recv_account": "招商银行信用卡0403",
+    "fund_source": "REFUND_SOURCE_REchARGE_FUNDS",
+    "success_time": "2018-06-08T10:34:56+08:00",
+    "create_time": "2018-06-08T10:34:56+08:00"
+}

test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/HKPartnerRefund/GetHKPartnerRefundByOutRefundNumberResponse.json

@@ -0,0 +1,32 @@
+{
+    "id": "2008450740201411110000174436",
+    "out_refund_no": "R20150806125346",
+    "transaction_id": "1008450740201411110005820873",
+    "out_trade_no": "20150806125346",
+    "amount": {
+        "refund": 50,
+        "currency": "CNY",
+        "payer_refund": 49,
+        "payer_currency": "HKD",
+        "exchange_rate": {
+            "type": "SETTLEMENT_RATE",
+            "rate": 8000000
+        }
+    },
+    "promotion_detail": [
+        {
+            "promotion_id": "109519",
+            "scope": "GLOBAL",
+            "type": "COUPON",
+            "amount": 1,
+            "refund_amount": 1,
+            "currency": "HKD"
+        }
+    ],
+    "channel": "ORIGINAL",
+    "status": "SUCCESS",
+    "recv_account": "招商银行信用卡0403",
+    "fund_source": "REFUND_SOURCE_REchARGE_FUNDS",
+    "success_time": "2018-06-08T10:34:56+08:00",
+    "create_time": "2018-06-08T10:34:56+08:00"
+}

test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/HKPartnerTransactions/CreateHKPartnerTransactionMicroPayResponse.json

@@ -25,24 +25,26 @@
     "bank_type": "CCB_DEBIT",
     "attach": "Payment test",
     "success_time": "2018-06-08T10:34:56+08:00",
-    "detail": {
-        "promotion_id": "109519",
-        "name": "Single-item discount-6",
-        "scope": "SINGLE",
-        "type": "DISCOUNT",
-        "amount": 1,
-        "currency": "CNY",
-        "activity_id": "931386",
-        "wechatpay_contribute_amount": 1,
-        "merchant_contribute_amount": 0,
-        "other_contribute_amount": 0,
-        "goods_detail": [
-            {
-                "goods_id": "iphone6s_16G",
-                "goods_remark": "Product remarks",
-                "quantity": 1,
-                "price": 528800
-            }
-        ]
-    }
+    "promotion_detail": [
+        {
+            "promotion_id": "109519",
+            "name": "Single-item discount-6",
+            "scope": "SINGLE",
+            "type": "DISCOUNT",
+            "amount": 1,
+            "currency": "CNY",
+            "activity_id": "931386",
+            "wechatpay_contribute_amount": 1,
+            "merchant_contribute_amount": 0,
+            "other_contribute_amount": 0,
+            "goods_detail": [
+                {
+                    "goods_id": "iphone6s_16G",
+                    "goods_remark": "Product remarks",
+                    "quantity": 1,
+                    "price": 528800
+                }
+            ]
+        }
+    ]
 }

test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/HKRefund/CreateHKRefundRequest.json

@@ -0,0 +1,12 @@
+{
+    "appid": "wx2421b1c4370ec43b",
+    "mchid": "10000100",
+    "transaction_id": "1008450740201411110005820873",
+    "out_refund_no": "R20150806125346",
+    "amount": {
+        "refund": 50,
+        "total": 100,
+        "currency": "HKD"
+    },
+    "reason": "商品已售完"
+}

test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/HKRefund/CreateHKRefundResponse.json

@@ -0,0 +1,25 @@
+{
+    "id": "2008450740201411110000174436",
+    "out_refund_no": "R20150806125346",
+    "create_time": "2018-06-08T10:34:56+08:00",
+    "amount": {
+        "refund": 50,
+        "currency": "CNY",
+        "payer_refund": 49,
+        "payer_currency": "HKD",
+        "exchange_rate": {
+            "type": "SETTLEMENT_RATE",
+            "rate": 8000000
+        }
+    },
+    "promotion_detail": [
+        {
+            "promotion_id": "109519",
+            "scope": "GLOBAL",
+            "type": "COUPON",
+            "amount": 1,
+            "refund_amount": 1,
+            "currency": "HKD"
+        }
+    ]
+}

test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/HKRefund/GetHKRefundByIdResponse.json

@@ -0,0 +1,32 @@
+{
+    "id": "2008450740201411110000174436",
+    "out_refund_no": "R20150806125346",
+    "transaction_id": "1008450740201411110005820873",
+    "out_trade_no": "20150806125346",
+    "amount": {
+        "refund": 50,
+        "currency": "CNY",
+        "payer_refund": 49,
+        "payer_currency": "HKD",
+        "exchange_rate": {
+            "type": "SETTLEMENT_RATE",
+            "rate": 8000000
+        }
+    },
+    "promotion_detail": [
+        {
+            "promotion_id": "109519",
+            "scope": "GLOBAL",
+            "type": "COUPON",
+            "amount": 1,
+            "refund_amount": 1,
+            "currency": "HKD"
+        }
+    ],
+    "channel": "ORIGINAL",
+    "status": "SUCCESS",
+    "recv_account": "招商银行信用卡0403",
+    "fund_source": "REFUND_SOURCE_REchARGE_FUNDS",
+    "success_time": "2018-06-08T10:34:56+08:00",
+    "create_time": "2018-06-08T10:34:56+08:00"
+}

test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/HKRefund/GetHKRefundByOutRefundNumberResponse.json

@@ -0,0 +1,32 @@
+{
+    "id": "2008450740201411110000174436",
+    "out_refund_no": "R20150806125346",
+    "transaction_id": "1008450740201411110005820873",
+    "out_trade_no": "20150806125346",
+    "amount": {
+        "refund": 50,
+        "currency": "CNY",
+        "payer_refund": 49,
+        "payer_currency": "HKD",
+        "exchange_rate": {
+            "type": "SETTLEMENT_RATE",
+            "rate": 8000000
+        }
+    },
+    "promotion_detail": [
+        {
+            "promotion_id": "109519",
+            "scope": "GLOBAL",
+            "type": "COUPON",
+            "amount": 1,
+            "refund_amount": 1,
+            "currency": "HKD"
+        }
+    ],
+    "channel": "ORIGINAL",
+    "status": "SUCCESS",
+    "recv_account": "招商银行信用卡0403",
+    "fund_source": "REFUND_SOURCE_REchARGE_FUNDS",
+    "success_time": "2018-06-08T10:34:56+08:00",
+    "create_time": "2018-06-08T10:34:56+08:00"
+}

test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/HKTransactions/CreateHKTransactionMicroPayResponse.json

@@ -22,24 +22,26 @@
     "bank_type": "CCB_DEBIT",
     "attach": "Payment test",
     "success_time": "2018-06-08T10:34:56+08:00",
-    "detail": {
-        "promotion_id": "109519",
-        "name": "Single-item discount-6",
-        "scope": "SINGLE",
-        "type": "DISCOUNT",
-        "amount": 1,
-        "currency": "CNY",
-        "activity_id": "931386",
-        "wechatpay_contribute_amount": 1,
-        "merchant_contribute_amount": 0,
-        "other_contribute_amount": 0,
-        "goods_detail": [
-            {
-                "goods_id": "iphone6s_16G",
-                "goods_remark": "Product remarks",
-                "quantity": 1,
-                "price": 528800
-            }
-        ]
-    }
+    "promotion_detail": [
+        {
+            "promotion_id": "109519",
+            "name": "Single-item discount-6",
+            "scope": "SINGLE",
+            "type": "DISCOUNT",
+            "amount": 1,
+            "currency": "CNY",
+            "activity_id": "931386",
+            "wechatpay_contribute_amount": 1,
+            "merchant_contribute_amount": 0,
+            "other_contribute_amount": 0,
+            "goods_detail": [
+                {
+                    "goods_id": "iphone6s_16G",
+                    "goods_remark": "Product remarks",
+                    "quantity": 1,
+                    "price": 528800
+                }
+            ]
+        }
+    ]
 }