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1using System;
2using System.Net.Http;
3using System.Net.Http.Headers;
4using System.Security.Cryptography;
5using System.Text;
6using System.Threading.Tasks;
7
8namespace AspNetCore.Api.CoinSpot
9{
10    public class CoinSpotClient
11    {
12        public static async Task<string> GetMyDeposits()
13        {
14            long nonce = DateTime.UtcNow.Ticks; //Get ticks for nonce
15            string APIKey = "-";
16            string Secret = "-";
17
18            HttpClient client = new HttpClient();
19            string url = "https://www.coinspot.com.au/api/ro/my/deposits";
20
21            var request = new HttpRequestMessage()
22            {
23                RequestUri = new Uri(url),
24                Method = HttpMethod.Post
25            };
26            request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
27
28            var hash = new StringBuilder();
29
30            //Create data string in JSON format
31            string signatureBaseString = "{\"nonce\":\"" + nonce + "\"}";
32
33            //Set POST data
34            request.Content = new StringContent(signatureBaseString, Encoding.UTF8, "application/json");
35            //Calculate HMAC512
36            hash.Append(SHA512_ComputeHash(request.Content.ReadAsStringAsync().Result, Secret));
37
38            //Set request headers
39            request.Headers.Add("key", APIKey);
40            request.Headers.Add("sign", hash.ToString());
41
42            //Send the request
43            HttpResponseMessage response = await client.SendAsync(request);
44
45            //Response as String
46            var result = await response.Content.ReadAsStringAsync();
47            return result;
48        }
49
50        public static string SHA512_ComputeHash(string text, string secretKey)
51        {
52            var hash = new StringBuilder();
53            byte[] secretkeyBytes = Encoding.UTF8.GetBytes(secretKey);
54            byte[] inputBytes = Encoding.UTF8.GetBytes(text);
55            using (var hmac = new HMACSHA512(secretkeyBytes))
56            {
57                byte[] hashValue = hmac.ComputeHash(inputBytes); //Update HMAC with postdata
58                foreach (var theByte in hashValue)
59                {
60                    hash.Append(theByte.ToString("x2")); //Output to HEX
61                }
62            }
63
64            return hash.ToString();
65        }
66    }
67}