/// <summary>
/// Adds an already verified transaction to the memory pool.
///
/// Note: This must only be called from a single thread (the Blockchain actor). To add a transaction to the pool
/// tell the Blockchain actor about the transaction.
/// </summary>
/// <param name="hash"></param>
/// <param name="tx"></param>
/// <returns></returns>
internal bool TryAdd(UInt256 hash, Transaction tx)
{
var poolItem = new PoolItem(tx);
if (_unsortedTransactions.ContainsKey(hash))
{
return(false);
}
List <Transaction> removedTransactions = null;
_txRwLock.EnterWriteLock();
try
{
_unsortedTransactions.Add(hash, poolItem);
_sortedTransactions.Add(poolItem);
if (Count > Capacity)
{
removedTransactions = RemoveOverCapacity();
}
}
finally
{
_txRwLock.ExitWriteLock();
}
foreach (IMemoryPoolTxObserverPlugin plugin in Plugin.TxObserverPlugins)
{
plugin.TransactionAdded(poolItem.Tx);
if (removedTransactions != null)
{
plugin.TransactionsRemoved(MemoryPoolTxRemovalReason.CapacityExceeded, removedTransactions);
}
}
return(_unsortedTransactions.ContainsKey(hash));
}
private PoolItem GetLowestFeeTransaction(SortedSet <PoolItem> verifiedTxSorted,
SortedSet <PoolItem> unverifiedTxSorted, out SortedSet <PoolItem> sortedPool)
{
PoolItem minItem = unverifiedTxSorted.Min;
sortedPool = minItem != null ? unverifiedTxSorted : null;
PoolItem verifiedMin = verifiedTxSorted.Min;
if (verifiedMin == null)
{
return(minItem);
}
if (minItem != null && verifiedMin.CompareTo(minItem) >= 0)
{
return(minItem);
}
sortedPool = verifiedTxSorted;
minItem = verifiedMin;
return(minItem);
}