public static decimal CalculatePowerDifference(ApiStake stake, ApiFund fund, IReadOnlyList <ApiStakeEvent> events, ApiStakeEvent eventItem)
{
if (eventItem.Type == StakeEventType.Lockup)
{
return(CalculatePower(stake, fund, eventItem));
}
else
{
var approximateQuantity = eventItem.Release.Quantity + (eventItem.Release.FeeQuantity ?? decimal.Zero);
var items = events
.Where(x => x.Type == StakeEventType.Lockup)
.ToList();
var lockUp = items.Count > 0
? items.Count == 1
? items.Single()
: items
.OrderBy(x => x.ConfirmedAt)
.FirstOrDefault(e => Math.Abs(e.Lock.Quantity - approximateQuantity) <= Precision)
: throw new PermanentException($"No existing lockup data could be found for release event {eventItem.Hash}");
return(-CalculatePower(stake, fund, lockUp));
}
}
public static decimal CalculateEarnings(ApiStake stake, ApiFund fund, IReadOnlyList <ApiStakeEvent> events, DateTime toDate)
{
return(CalculateEarnings(
stake,
fund,
events,
(int)((toDate - StartDate).TotalHours * 2)));
}
private static decimal CalculatePower(ApiStake stake, ApiFund fund, ApiStakeEvent eventItem)
{
var timeModifier = stake.TimeMultipliers
.SingleOrDefault(tm =>
tm.RangeMin <= eventItem.Lock.Duration.Days &&
tm.RangeMax >= eventItem.Lock.Duration.Days)
?.Multiplier ?? 1m;
var fundModifier = stake.FundMultipliers.ContainsKey(fund.Token.Symbol)
? stake.FundMultipliers[fund.Token.Symbol]
: 1m;
return(eventItem.Lock.Quantity * timeModifier * fundModifier * fund.Nav.PricePerToken);
}
public static decimal CalculateEarnings(ApiStake stake, ApiFund fund, IReadOnlyList <ApiStakeEvent> events, int intervals)
{
var icap = decimal.Zero;
var stakingPower = decimal.Zero;
var icapDistribution = 10000m;
var endDate = StartDate.AddMinutes(IntervalMinutes * intervals);
if (events.Any() && intervals > 0)
{
var eventQueue = new Queue <ApiStakeEvent>(events.OrderBy(x => x.ConfirmedAt));
if (eventQueue.Count == 0)
{
return(decimal.Zero);
}
else
{
var eventItem = eventQueue.Dequeue();
do
{
var endItem = eventQueue.Count > 0
? eventQueue.Dequeue()
: null;
stakingPower += CalculatePowerDifference(stake, fund, events, eventItem);
var relativePercentage = stakingPower / stake.Power.Power * 100;
var start = NormalizeDate(eventItem.ConfirmedAt);
var end = endItem != null
? NormalizeDate(endItem.ConfirmedAt)
: endDate;
var intervalsBeforeStart = ((decimal)(start - StartDate).TotalHours) * 2m;
var chargeableIntervals = Math.Max(intervals - intervalsBeforeStart, decimal.Zero);
var remainder = intervalsBeforeStart % IntervalsPerWeek;
var depreciations = (intervalsBeforeStart - remainder) / IntervalsPerWeek;
var intervalsInsideWindow = Math.Min(chargeableIntervals, IntervalsPerWeek - remainder);
icapDistribution = Math.Max(icapDistribution * (decimal)Math.Pow((double)DepreciationPercentage, (double)depreciations), MinDistribution);
// Add Remaining Ticks of this distribution
icap += (icapDistribution / IntervalsPerWeek) / 100 * relativePercentage * intervalsInsideWindow;
var ticks = ((decimal)(end - start).TotalHours * 2m) - intervalsInsideWindow;
var endRemainder = ticks % IntervalsPerWeek;
var fullRounds = (ticks - endRemainder) / IntervalsPerWeek;
icap += Enumerable
.Range(0, (int)fullRounds)
.Sum(_ =>
{
icapDistribution = Math.Max(icapDistribution * DepreciationPercentage, MinDistribution);
return(icapDistribution / 100 * relativePercentage);
});
if (endRemainder != default)
{
var nextIcapDistribution = Math.Max(icapDistribution * DepreciationPercentage, MinDistribution);
icap += nextIcapDistribution / IntervalsPerWeek / 100 * relativePercentage * endRemainder;
}
eventItem = endItem;
}while (eventQueue.Count > 0);
}
}
return(Math.Max(icap, decimal.Zero));
}
