Opayo API -无法验证签名

Question

我一直在尝试连接到Opayo的'Reporting & Admin API‘并使用'getTransactionDetail’(https://developer-eu.elavon.com/docs/opayo-reporting-api/reporting-commands/gettransactiondetail)命令，但总是返回错误0010，这表明该接口无法验证签名值。我们已经能够使用我们的Vendor/用户名/密码组合登录，验证它们都是正确的。

我们在向API发送帖子时使用的代码如下--出于安全考虑，某些元素被屏蔽了。

using System;
using System.Collections.Specialized;
using System.Security.Cryptography;
using System.Text;
using System.Net;

public partial class test : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        string signature = "<command>getTransactionDetail</command><vendor>[Vendor]</vendor><user>[User]</user><vendortxcode>[VendorTXCode]</vendortxcode><password>[Password]</password>";

        using (MD5 md5 = MD5.Create())
        {
            byte[] inputBytes = Encoding.Unicode.GetBytes(signature);
            byte[] hashBytes = md5.ComputeHash(inputBytes);

            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < hashBytes.Length; i++)
            {
                sb.Append(hashBytes[i].ToString("X2"));
            }
            signature = sb.ToString();
        }

        string xmlToPost = "<vspaccess><command>getTransactionDetail</command><vendor>[Vendor]</vendor><user>[User]</user><vendortxcode>[VendorTXCode]</vendortxcode><signature>" + signature + "</signature></vspaccess>";

        using (WebClient client = new WebClient())
        {
            client.BaseAddress = "https://test.sagepay.com";
            client.Headers.Add("Content-Type", "application/x-www-form-urlencoded");
            client.Encoding = Encoding.UTF8;

            var content = new NameValueCollection()
            {
                { "XML", xmlToPost }
            };

            string response = Encoding.UTF8.GetString(client.UploadValues("/access/access.htm", content));
        }
    }
}

任何帮助解决这个问题的人都将不胜感激！

Answer 1

事实证明，由于我们使用表单集成进行初始付款，所以我们不得不使用以下API文档：https://developer-eu.elavon.com/docs/opayo/spec/api-reference

更具体地说，这部分与重复有关：https://developer-eu.elavon.com/docs/opayo/spec/api-reference#operation/createTransaction

请注意右侧的代码示例！