feat: 接入 OKX 加密货币数据源（实时价格+历史K线）

AssetManager.Infrastructure/Services/MarketDataService.cs

@@ -70,12 +70,38 @@ public class MarketDataService : IMarketDataService
     /// <summary>
     /// 获取加密货币实时价格
     /// </summary>
-    /// <param name="symbol">加密货币代码（如 BTCUSD）</param>
+    /// <param name="symbol">加密货币代码（如 BTC-USDT）</param>
     /// <returns>加密货币价格信息</returns>
     public async Task<MarketPriceResponse> GetCryptoPriceAsync(string symbol)
     {
-        // 待接入 OKX API
-        throw new NotImplementedException("加密货币数据源待接入 OKX API");
+        try
+        {
+            _logger.LogInformation($"Requesting crypto price for symbol: {symbol}");
+
+            // OKX 实时 ticker 接口，symbol 格式如 BTC-USDT
+            var url = $"https://www.okx.com/api/v5/market/ticker?instId={symbol}";
+            var response = await _httpClient.GetFromJsonAsync<OkxTickerResponse>(url);
+
+            if (response == null || response.code != "0" || response.data == null || response.data.Count == 0)
+            {
+                throw new Exception($"No data found for {symbol}, code: {response?.code}, msg: {response?.msg}");
+            }
+
+            var latest = response.data[0];
+            return new MarketPriceResponse
+            {
+                Symbol = symbol,
+                Price = decimal.TryParse(latest.last, out var price) ? price : 0,
+                PreviousClose = decimal.TryParse(latest.sodUtc0, out var prevClose) ? prevClose : 0, // UTC0 开盘价作为昨日收盘价
+                Timestamp = DateTime.UtcNow,
+                AssetType = "Crypto"
+            };
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, $"Error getting crypto price for {symbol}");
+            throw;
+        }
     }
 
     /// <summary>
@@ -133,14 +159,82 @@ public class MarketDataService : IMarketDataService
     /// <summary>
     /// 获取加密货币历史数据
     /// </summary>
-    /// <param name="symbol">加密货币代码</param>
+    /// <param name="symbol">加密货币代码（如 BTC-USDT）</param>
     /// <param name="timeframe">时间周期</param>
     /// <param name="limit">数据点数量</param>
     /// <returns>历史数据列表</returns>
     public async Task<List<MarketDataResponse>> GetCryptoHistoricalDataAsync(string symbol, string timeframe, int limit)
     {
-        // 待接入 OKX API
-        throw new NotImplementedException("加密货币数据源待接入 OKX API");
+        try
+        {
+            _logger.LogInformation($"Requesting crypto historical data for symbol: {symbol}, timeframe: {timeframe}, limit: {limit}");
+
+            // 转换 timeframe 为 OKX 支持的粒度
+            var bar = ConvertToOkxBar(timeframe);
+            
+            // OKX K线接口
+            var url = $"https://www.okx.com/api/v5/market/candles?instId={symbol}&bar={bar}&limit={limit}";
+            var response = await _httpClient.GetFromJsonAsync<OkxCandlesResponse>(url);
+
+            if (response == null || response.code != "0" || response.data == null)
+            {
+                throw new Exception($"No data found for {symbol}, code: {response?.code}, msg: {response?.msg}");
+            }
+
+            var result = new List<MarketDataResponse>();
+            foreach (var item in response.data)
+            {
+                if (item.Length < 6) continue;
+
+                if (long.TryParse(item[0], out var ts) &&
+                    decimal.TryParse(item[1], out var open) &&
+                    decimal.TryParse(item[2], out var high) &&
+                    decimal.TryParse(item[3], out var low) &&
+                    decimal.TryParse(item[4], out var close) &&
+                    decimal.TryParse(item[5], out var volume))
+                {
+                    result.Add(new MarketDataResponse
+                    {
+                        Symbol = symbol,
+                        Open = open,
+                        High = high,
+                        Low = low,
+                        Close = close,
+                        Volume = volume,
+                        Timestamp = DateTimeOffset.FromUnixTimeMilliseconds(ts).UtcDateTime,
+                        AssetType = "Crypto"
+                    });
+                }
+            }
+
+            // 按时间升序排列
+            result = result.OrderBy(x => x.Timestamp).ToList();
+            return result;
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, $"Error getting crypto historical data for {symbol}");
+            throw;
+        }
+    }
+
+    /// <summary>
+    /// 转换 timeframe 为 OKX 支持的 bar 格式
+    /// </summary>
+    private string ConvertToOkxBar(string timeframe)
+    {
+        return timeframe.ToLower() switch
+        {
+            "1min" => "1m",
+            "5min" => "5m",
+            "15min" => "15m",
+            "1h" => "1H",
+            "4h" => "4H",
+            "1d" => "1D",
+            "1w" => "1W",
+            "1m" => "1M",
+            _ => "1D"
+        };
     }
 
     /// <summary>
@@ -195,3 +289,25 @@ internal class TiingoCryptoBar
     public decimal? volume { get; set; }
     public DateTime? date { get; set; }
 }
+
+// OKX 响应模型
+internal class OkxTickerResponse
+{
+    public string code { get; set; }
+    public string msg { get; set; }
+    public List<OkxTickerData> data { get; set; }
+}
+
+internal class OkxTickerData
+{
+    public string instId { get; set; }
+    public string last { get; set; }
+    public string sodUtc0 { get; set; } // UTC0 开盘价，作为昨日收盘价
+}
+
+internal class OkxCandlesResponse
+{
+    public string code { get; set; }
+    public string msg { get; set; }
+    public List<string[]> data { get; set; }
+}