Shrimpy.io Signing Request Sample in C#

shrimpy-request-sample.cs

using System;
using System.Net.Http;
using System.Security.Cryptography;
using System.Text;

/*
 * This gist shows a sample of signing a GET request for shrimpy.io
 * based on Pyton sample on https://developers.shrimpy.io/docs/?python#creating-a-request
*/

namespace shrimpy_test
{
    class Program
    {
        static string apiKey = "YOUR-API-KEY";
        static string pk = "YOUR-PRIVATE-KEY";

        private static readonly HttpClient client = new HttpClient();

        static void Main(string[] args)
        {
            string secretKey = pk;
            TimeSpan t = (DateTime.UtcNow - new DateTime(1970, 1, 1));
            long nonce = (long)t.TotalMilliseconds;

            string baseUrl = "https://dev-api.shrimpy.io";
            string requestPath = "/v1/users";
            string body = "";

            string method = "GET";
            string prehashString = string.Join("", requestPath, method, nonce.ToString(), body);


            string signature_b64 = GetSignature(secretKey, prehashString);

            HttpRequestMessage msg = new HttpRequestMessage(HttpMethod.Get, $"{baseUrl}{requestPath}");
            msg.Content = new StringContent(body, Encoding.UTF8, "application/json");
            client.DefaultRequestHeaders.Add("DEV-SHRIMPY-API-KEY", apiKey);
            client.DefaultRequestHeaders.Add("DEV-SHRIMPY-API-NONCE", nonce.ToString());
            client.DefaultRequestHeaders.Add("DEV-SHRIMPY-API-SIGNATURE", signature_b64);

            var response = client.SendAsync(msg);
            var responseString = response.Result.Content.ReadAsStringAsync().Result;

            Console.WriteLine($"{responseString}");
        }

        public static string GetSignature(string key, string message)
        {
            using (var hmacsha256 = new HMACSHA256(Convert.FromBase64String(key)))
            {
                byte[] hashmessage = hmacsha256.ComputeHash(Encoding.ASCII.GetBytes(message));
                return Convert.ToBase64String(hashmessage);
            }
        }
    }
}

Thanks for this code, but there is a bug..

client.DefaultRequestHeaders.Add

Will keep appending the request headers when used in a loop..
DEV-SHRIMPY-API-NONCE: 1608932025545, 1608932026202, 1608932026254, 1608932026744, 1608932026771, 1608932026839, 1608932026905

Tried this code, as-is. Getting this error:

ProtocolViolationException: Cannot send a content-body with this verb-type.