async Task INotificationHandler <IncentiveCanceled> .Handle(IncentiveCanceled e, CancellationToken cancellationToken)
{
var incentive =
await db.Incentives
.SingleAsync(t => t.InternalId == e.Id);
incentive.IsCanceled = true;
incentive.CancelAt = e.TimeStamp;
await db.SaveChangesAsync();
}
private void Apply(IncentiveCanceled e)
{
this.IsCanceled = true;
}