private void OnTxesUnconfirmed(object sender, TxesUnconfirmedEventArgs e)
{
// re-org, remove stats at height on a roll back
lock (confirmedBlockStatsByHeight)
confirmedBlockStatsByHeight.Remove(e.UnconfirmBlock.Height);
// detect re-org that went past the re-org buffer allowance
if (e.UnconfirmBlock.Height <= unconfirmedTxesLogHeight - REORG_BUFFER)
logger.Warn($"StatsWorker re-orged past its allowance of {REORG_BUFFER} blocks at height {e.UnconfirmBlock.Height}");
}