internal async Task <AllFeeEstimate> GetAllFeeEstimateAsync(EstimateSmartFeeMode mode) { var cacheKey = $"{nameof(GetAllFeeEstimateAsync)}_{mode}"; if (!Cache.TryGetValue(cacheKey, out AllFeeEstimate allFee)) { allFee = await RpcClient.EstimateAllFeeAsync(mode, simulateIfRegTest : true, tolerateBitcoinCoreBrainfuck : true); var cacheEntryOptions = new MemoryCacheEntryOptions() .SetAbsoluteExpiration(TimeSpan.FromSeconds(500)); Cache.Set(cacheKey, allFee, cacheEntryOptions); } return(allFee); }