private void Add(CoinJoinFeeRateStat feeRateStat)
{
CoinJoinFeeRateStats.Add(feeRateStat);
DefaultAverages = TimeFrames.Select(t => new CoinJoinFeeRateAverage(t, GetAverage(t))).ToArray();
// Prune old items.
DateTimeOffset removeBefore = DateTimeOffset.UtcNow - MaximumTimeToStore;
while (CoinJoinFeeRateStats.Any() && CoinJoinFeeRateStats[0].DateTimeOffset < removeBefore)
{
CoinJoinFeeRateStats.RemoveAt(0);
}
}
private FeeRate GetMedian(TimeSpan timeFrame)
{
var from = DateTimeOffset.UtcNow - timeFrame;
var feeRates = CoinJoinFeeRateStats
.Where(x => x.DateTimeOffset >= from)
.OrderByDescending(x => x.FeeRate.SatoshiPerByte)
.ToArray();
// If the median is even, then it's the average of the middle two numbers.
FeeRate med = feeRates.Length % 2 == 0
? new FeeRate((feeRates[feeRates.Length / 2].FeeRate.SatoshiPerByte + feeRates[(feeRates.Length / 2) - 1].FeeRate.SatoshiPerByte) / 2)
: feeRates[feeRates.Length / 2].FeeRate;
return(med);
}
private FeeRate GetAverage(TimeSpan timeFrame)
{
var from = DateTimeOffset.UtcNow - timeFrame;
return(new FeeRate(CoinJoinFeeRateStats.Where(x => x.DateTimeOffset >= from).Average(x => x.FeeRate.SatoshiPerByte)));
}
