public bool IsRelevantAndUpdate(Transaction tx)
{
if (tx == null)
{
throw new ArgumentNullException("tx");
}
var hash = tx.GetHash();
bool fFound = false;
// Match if the filter contains the hash of tx
// for finding tx when they appear in a block
if (isFull)
{
return(true);
}
if (isEmpty)
{
return(false);
}
if (Contains(hash))
{
fFound = true;
}
for (uint i = 0; i < tx.Outputs.Count; i++)
{
TxOut txout = tx.Outputs[(int)i];
// Match if the filter contains any arbitrary script data element in any scriptPubKey in tx
// If this matches, also add the specific output that was matched.
// This means clients don't have to update the filter themselves when a new relevant tx
// is discovered in order to find spending transactions, which avoids round-tripping and race conditions.
foreach (Op op in txout.ScriptPubKey.ToOps())
{
if (op.PushData != null && op.PushData.Length != 0 && Contains(op.PushData))
{
fFound = true;
if ((nFlags & (byte)BloomFlags.UPDATE_MASK) == (byte)BloomFlags.UPDATE_ALL)
{
Insert(new OutPoint(hash, i));
}
else if ((nFlags & (byte)BloomFlags.UPDATE_MASK) == (byte)BloomFlags.UPDATE_P2PUBKEY_ONLY)
{
var template = StandardScripts.GetTemplateFromScriptPubKey(txout.ScriptPubKey);
if (template != null &&
(template.Type == TxOutType.TX_PUBKEY || template.Type == TxOutType.TX_MULTISIG))
{
Insert(new OutPoint(hash, i));
}
}
break;
}
}
}
if (fFound)
{
return(true);
}
foreach (TxIn txin in tx.Inputs)
{
// Match if the filter contains an outpoint tx spends
if (Contains(txin.PrevOut))
{
return(true);
}
// Match if the filter contains any arbitrary script data element in any scriptSig in tx
foreach (Op op in txin.ScriptSig.ToOps())
{
if (op.PushData != null && op.PushData.Length != 0 && Contains(op.PushData))
{
return(true);
}
}
}
return(false);
}
