Fix worker cancelled on worker + Cache tickers

src/Managing.Application.Workers/StatisticService.cs

@@ -1,4 +1,5 @@
-using Managing.Application.Abstractions.Repositories;
+using Managing.Application.Abstractions;
+using Managing.Application.Abstractions.Repositories;
 using Managing.Application.Abstractions.Services;
 using Managing.Application.Workers.Abstractions;
 using Managing.Domain.Accounts;
@@ -23,6 +24,7 @@ public class StatisticService : IStatisticService
     private readonly IBacktester _backtester;
     private readonly ITradaoService _tradaoService;
     private readonly IMessengerService _messengerService;
+    private readonly ICacheService _cacheService;
     private readonly ILogger<StatisticService> _logger;
 
     public StatisticService(
@@ -34,7 +36,8 @@ public class StatisticService : IStatisticService
         ITradingService tradingService,
         IBacktester backtester,
         ITradaoService tradaoService,
-        IMessengerService messengerService)
+        IMessengerService messengerService,
+        ICacheService cacheService)
     {
         _exchangeService = exchangeService;
         _accountService = accountService;
@@ -45,6 +48,7 @@ public class StatisticService : IStatisticService
         _backtester = backtester;
         _tradaoService = tradaoService;
         _messengerService = messengerService;
+        _cacheService = cacheService;
     }
 
     public async Task UpdateTopVolumeTicker(TradingExchanges exchange, int top)
@@ -159,7 +163,16 @@ public class StatisticService : IStatisticService
 
     public async Task<IList<Ticker>> GetTickers()
     {
-        return await _evmManager.GetAvailableTicker();
+        var cachedTickers = _cacheService.GetValue<List<Ticker>>("tickers");
+
+        if (cachedTickers != null)
+        {
+            return cachedTickers;
+        }
+
+        var tickers = await _evmManager.GetAvailableTicker();
+        _cacheService.SaveValue("tickers", tickers, TimeSpan.FromDays(1));
+        return tickers;
     }
 
     public async Task UpdateSpotlight()