public bool HasConflict(Transaction tx)
{
var existingUTXOs = new HashSet <OutPoint>(UTXOs.Select(u => u.Outpoint));
var spentOutpoints = new HashSet <OutPoint>(SpentOutpoints);
//If there is double spending
foreach (var input in tx.Inputs)
{
if (spentOutpoints.Contains(input.PrevOut))
{
return(true);
}
spentOutpoints.Add(input.PrevOut);
}
var index = -1;
foreach (var output in tx.Outputs)
{
index++;
var outpoint = new OutPoint(tx.GetHash(), index);
if (existingUTXOs.Contains(outpoint) || spentOutpoints.Contains(outpoint))
{
return(true);
}
existingUTXOs.Add(outpoint);
}
return(false);
}
public void LoadChanges(Transaction tx, Func <Script, KeyPath> getKeyPath)
{
if (tx == null)
{
throw new ArgumentNullException("tx");
}
tx.CacheHashes();
var existingUTXOs = new HashSet <OutPoint>(UTXOs.Select(u => u.Outpoint));
var removedUTXOs = new HashSet <OutPoint>(SpentOutpoints);
foreach (var input in tx.Inputs)
{
if (existingUTXOs.Remove(input.PrevOut))
{
removedUTXOs.Add(input.PrevOut);
}
}
int index = -1;
foreach (var output in tx.Outputs)
{
index++;
if (!existingUTXOs.Contains(new OutPoint(tx.GetHash(), index)))
{
var keyPath = getKeyPath(output.ScriptPubKey);
if (keyPath != null)
{
var outpoint = new OutPoint(tx.GetHash(), index);
UTXOs.Add(new UTXO(outpoint, output, keyPath));
existingUTXOs.Add(outpoint);
}
}
}
UTXOs = UTXOs.Where(u => existingUTXOs.Contains(u.Outpoint)).ToList();
SpentOutpoints = removedUTXOs.ToList();
}