Add Bitcoin average quota

BTCPayServer/Controllers/InvoiceController.UI.cs

@@ -253,7 +253,7 @@ namespace BTCPayServer.Controllers
             };
 
             var expiration = TimeSpan.FromSeconds(model.ExpirationSeconds);
-            model.TimeLeft = PrettyPrint(expiration);
+            model.TimeLeft = expiration.PrettyPrint();
             return model;
         }
 
@@ -272,17 +272,6 @@ namespace BTCPayServer.Controllers
             return price.ToString("C", _CurrencyNameTable.GetCurrencyProvider(currency)) + $" ({currency})";
         }
 
-        private string PrettyPrint(TimeSpan expiration)
-        {
-            StringBuilder builder = new StringBuilder();
-            if (expiration.Days >= 1)
-                builder.Append(expiration.Days.ToString(CultureInfo.InvariantCulture));
-            if (expiration.Hours >= 1)
-                builder.Append(expiration.Hours.ToString("00", CultureInfo.InvariantCulture));
-            builder.Append($"{expiration.Minutes.ToString("00", CultureInfo.InvariantCulture)}:{expiration.Seconds.ToString("00", CultureInfo.InvariantCulture)}");
-            return builder.ToString();
-        }
-
         [HttpGet]
         [Route("i/{invoiceId}/status")]
         [Route("i/{invoiceId}/{paymentMethodId}/status")]

BTCPayServer/Controllers/ServerController.cs

@@ -36,13 +36,28 @@ namespace BTCPayServer.Controllers
         public async Task<IActionResult> Rates()
         {
             var rates = (await _SettingsRepository.GetSettingAsync<RatesSetting>()) ?? new RatesSetting();
-            return View(new RatesViewModel()
+
+            var vm = new RatesViewModel()
             {
                 CacheMinutes = rates.CacheInMinutes,
                 PrivateKey = rates.PrivateKey,
                 PublicKey = rates.PublicKey
-            });
+            };
+            await FetchRateLimits(vm);
+            return View(vm);
+        }
 
+        private static async Task FetchRateLimits(RatesViewModel vm)
+        {
+            var coinAverage = GetCoinaverageService(vm, false);
+            if (coinAverage != null)
+            {
+                try
+                {
+                    vm.RateLimits = await coinAverage.GetRateLimitsAsync();
+                }
+                catch { }
+            }
         }
 
         [Route("server/rates")]
@@ -55,27 +70,38 @@ namespace BTCPayServer.Controllers
             rates.CacheInMinutes = vm.CacheMinutes;
             try
             {
-                var settings = new CoinAverageSettings()
+                var service = GetCoinaverageService(vm, true);
-                {
+                if(service != null)
-                    KeyPair = (vm.PublicKey, vm.PrivateKey)
+                    await service.TestAuthAsync();
-                };
-                if (settings.GetCoinAverageSignature() != null)
-                {
-                    await new CoinAverageRateProvider("BTC")
-                    { Authenticator = settings }.TestAuthAsync();
-                }
             }
             catch
             {
                 ModelState.AddModelError(nameof(vm.PrivateKey), "Invalid API key pair");
             }
             if (!ModelState.IsValid)
+            {
+                await FetchRateLimits(vm);
                 return View(vm);
+            }
             await _SettingsRepository.UpdateSetting(rates);
             StatusMessage = "Rate settings successfully updated";
             return RedirectToAction(nameof(Rates));
         }
 
+        private static CoinAverageRateProvider GetCoinaverageService(RatesViewModel vm, bool withAuth)
+        {
+            var settings = new CoinAverageSettings()
+            {
+                KeyPair = (vm.PublicKey, vm.PrivateKey)
+            };
+            if (!withAuth || settings.GetCoinAverageSignature() != null)
+            {
+                return new CoinAverageRateProvider("BTC")
+                { Authenticator = settings };
+            }
+            return null;
+        }
+
         [Route("server/users")]
         public IActionResult ListUsers()
         {

BTCPayServer/Extensions.cs

@@ -28,11 +28,22 @@ using BTCPayServer.Payments;
 using Microsoft.AspNetCore.Identity;
 using BTCPayServer.Models;
 using System.Security.Claims;
+using System.Globalization;
 
 namespace BTCPayServer
 {
     public static class Extensions
     {
+        public static string PrettyPrint(this TimeSpan expiration)
+        {
+            StringBuilder builder = new StringBuilder();
+            if (expiration.Days >= 1)
+                builder.Append(expiration.Days.ToString(CultureInfo.InvariantCulture));
+            if (expiration.Hours >= 1)
+                builder.Append(expiration.Hours.ToString("00", CultureInfo.InvariantCulture));
+            builder.Append($"{expiration.Minutes.ToString("00", CultureInfo.InvariantCulture)}:{expiration.Seconds.ToString("00", CultureInfo.InvariantCulture)}");
+            return builder.ToString();
+        }
         public static decimal RoundUp(decimal value, int precision)
         {
             for (int i = 0; i < precision; i++)

BTCPayServer/Models/ServerViewModels/RatesViewModel.cs

@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using System.ComponentModel.DataAnnotations;
 using System.Linq;
 using System.Threading.Tasks;
+using BTCPayServer.Services.Rates;
 
 namespace BTCPayServer.Models.ServerViewModels
 {
@@ -14,5 +15,6 @@ namespace BTCPayServer.Models.ServerViewModels
         [Display(Name = "Cache the rates for ... minutes")]
         [Range(0, 60)]
         public int CacheMinutes { get; set; }
+        public GetRateLimitsResponse RateLimits { get; internal set; }
     }
 }

BTCPayServer/Services/Rates/CoinAverageRateProvider.cs

@@ -170,6 +170,23 @@ namespace BTCPayServer.Services.Rates
             resp.EnsureSuccessStatusCode();
         }
 
+        public async Task<GetRateLimitsResponse> GetRateLimitsAsync()
+        {
+            var request = new HttpRequestMessage(HttpMethod.Get, "https://apiv2.bitcoinaverage.com/info/ratelimits");
+            var auth = Authenticator;
+            if (auth != null)
+            {
+                await auth.AddHeader(request);
+            }
+            var resp = await _Client.SendAsync(request);
+            resp.EnsureSuccessStatusCode();
+            var jobj = JObject.Parse(await resp.Content.ReadAsStringAsync());
+            var response = new GetRateLimitsResponse();
+            response.CounterReset = TimeSpan.FromSeconds(jobj["counter_reset"].Value<int>());
+            response.RequestsLeft = jobj["requests_left"].Value<int>();
+            return response;
+        }
+
         public async Task<GetExchangeTickersResponse> GetExchangeTickersAsync()
         {
             var request = new HttpRequestMessage(HttpMethod.Get, "https://apiv2.bitcoinaverage.com/symbols/exchanges/ticker");
@@ -191,4 +208,10 @@ namespace BTCPayServer.Services.Rates
             return response;
         }
     }
+
+    public class GetRateLimitsResponse
+    {
+        public TimeSpan CounterReset { get; set; }
+        public int RequestsLeft { get; set; }
+    }
 }

BTCPayServer/Views/Server/Rates.cshtml

@@ -28,7 +28,6 @@
                 <input asp-for="PublicKey" style="width:50%;" class="form-control" placeholder="Public key" />
                 <label class="sr-only" asp-for="PrivateKey"></label>
                 <input asp-for="PrivateKey" style="width:50%;" class="form-control" placeholder="Private key" />
-                <span asp-validation-for="PrivateKey" class="text-danger"></span>
                 <p class="form-text text-muted">You can find the information on <a target="_blank" href="https://bitcoinaverage.com/en/apikeys">bitcoinaverage api key page</a></p>
             </div>
             <div class="form-group">
@@ -36,6 +35,20 @@
                 <input asp-for="CacheMinutes" class="form-control" />
                 <span asp-validation-for="CacheMinutes" class="text-danger"></span>
             </div>
+            @if(Model.RateLimits != null)
+            {
+                <h5>Current Bitcoin Average Quotas:</h5>
+                <table class="table table-sm">
+                    <tr>
+                        <th>Requests left</th>
+                        <td>@Model.RateLimits.RequestsLeft</td>
+                    </tr>
+                    <tr>
+                        <th>Quota reset in</th>
+                        <td>@Model.RateLimits.CounterReset</td>
+                    </tr>
+                </table>
+            }
             <button type="submit" class="btn btn-primary" name="command" value="Save">Save</button>
         </form>
     </div>