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The CoinGecko rate provider is similar to the bitcoin average one, in that you can ask it for a rate from its aggregated sourcing or you can get rates from specific exchanges. I've added support for both. I haven't integrated it or replaced coinaverage just to see if we should use it as the default and switch everyone to it or what other action to take.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,16 @@ | ||
| namespace BTCPayServer.Rating | ||
| { | ||
| public class AvailableRateProvider | ||
| { | ||
| public string Name { get; set; } | ||
| public string Url { get; set; } | ||
| public string Id { get; set; } | ||
|
|
||
| public AvailableRateProvider(string id, string name, string url) | ||
| { | ||
| Id = id; | ||
| Name = name; | ||
| Url = url; | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,96 @@ | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
| using System.Net.Http; | ||
| using System.Threading; | ||
| using System.Threading.Tasks; | ||
| using BTCPayServer.Rating; | ||
| using Newtonsoft.Json.Linq; | ||
|
|
||
| namespace BTCPayServer.Services.Rates | ||
| { | ||
| public class CoinGeckoRateProvider : IRateProvider, IHasExchangeName | ||
| { | ||
| private readonly HttpClient Client; | ||
| public static string CoinGeckoName { get; } = "coingecko"; | ||
| public string Exchange { get; set; } | ||
| public string ExchangeName => Exchange ?? CoinGeckoName; | ||
|
|
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| public CoinGeckoRateProvider(IHttpClientFactory httpClientFactory) | ||
| { | ||
| if (httpClientFactory == null) | ||
| { | ||
| return;; | ||
| } | ||
| Client = httpClientFactory.CreateClient(); | ||
| Client.BaseAddress = new Uri("https://api.coingecko.com/api/v3/"); | ||
| Client.DefaultRequestHeaders.Add("Accept", "application/json"); | ||
| } | ||
|
|
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| private IEnumerable<AvailableRateProvider> _availableExchanges; | ||
|
|
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| public virtual async Task<IEnumerable<AvailableRateProvider>> GetAvailableExchanges(bool reload = false) | ||
| { | ||
| if (_availableExchanges != null && !reload) return _availableExchanges; | ||
| var resp = await Client.GetAsync("exchanges/list"); | ||
| resp.EnsureSuccessStatusCode(); | ||
| _availableExchanges = JArray.Parse(await resp.Content.ReadAsStringAsync()) | ||
| .Select(token => | ||
| new AvailableRateProvider(token["id"].ToString().ToLowerInvariant(), token["name"].ToString(), | ||
| $"{Client.BaseAddress}exchanges/{token["id"]}/tickers")); | ||
|
|
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| return _availableExchanges; | ||
| } | ||
|
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| public virtual Task<ExchangeRates> GetRatesAsync(CancellationToken cancellationToken) | ||
| { | ||
| return ExchangeName == CoinGeckoName ? GetCoinGeckoRates() : GetCoinGeckoExchangeSpecificRates(); | ||
| } | ||
|
|
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| private async Task<ExchangeRates> GetCoinGeckoRates() | ||
| { | ||
| var resp = await Client.GetAsync("exchange_rates"); | ||
| resp.EnsureSuccessStatusCode(); | ||
| return new ExchangeRates(JObject.Parse(await resp.Content.ReadAsStringAsync()).GetValue("rates").Children() | ||
| .Select(token => new ExchangeRate(CoinGeckoName, | ||
| new CurrencyPair("BTC", ((JProperty)token).Name.ToString()), | ||
| new BidAsk(((JProperty)token).Value["value"].Value<decimal>())))); | ||
| } | ||
|
|
||
| private async Task<ExchangeRates> GetCoinGeckoExchangeSpecificRates(int page = 1) | ||
| { | ||
| var resp = await Client.GetAsync($"exchanges/{Exchange}/tickers?page={page}"); | ||
|
|
||
| resp.EnsureSuccessStatusCode(); | ||
| List<ExchangeRate> result = JObject.Parse(await resp.Content.ReadAsStringAsync()).GetValue("tickers") | ||
| .Select(token => new ExchangeRate(ExchangeName, | ||
| new CurrencyPair(token.Value<string>("base"), token.Value<string>("target")), | ||
| new BidAsk(token.Value<decimal>("last")))).ToList(); | ||
| if (page == 1 && resp.Headers.TryGetValues("total", out var total) && | ||
| resp.Headers.TryGetValues("per-page", out var perPage)) | ||
| { | ||
| var totalItems = int.Parse(total.First()); | ||
| var perPageItems = int.Parse(perPage.First()); | ||
|
|
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| var totalPages = totalItems / perPageItems; | ||
| if (totalItems % perPageItems != 0) | ||
| { | ||
| totalPages++; | ||
| } | ||
|
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| var tasks = new List<Task<ExchangeRates>>(); | ||
| for (int i = 2; i <= totalPages; i++) | ||
| { | ||
| tasks.Add(GetCoinGeckoExchangeSpecificRates(i)); | ||
| } | ||
|
|
||
| foreach (var t in (await Task.WhenAll(tasks))) | ||
| { | ||
| result.AddRange(t); | ||
| } | ||
| } | ||
|
|
||
| return new ExchangeRates(result); | ||
| } | ||
| } | ||
| } |
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