/* This method is commonly used by the node to determine if the transaction has
* the correct mixin (anonymity) as defined by the current rules */
public static Tuple <bool, string> validate(CachedTransaction transaction, ulong minMixin, ulong maxMixin)
{
ulong ringSize = 1;
var tx = createTransaction(transaction.getTransaction());
for (uint i = 0; i < tx.getInputCount(); ++i)
{
if (tx.getInputType(i) != TransactionTypes.InputType.Key)
{
continue;
}
KeyInput input = new KeyInput();
tx.getInput(i, input);
ulong currentRingSize = input.outputIndexes.Count;
if (currentRingSize > ringSize)
{
ringSize = currentRingSize;
}
}
/* Ring size = mixin + 1 - your transaction plus the others you mix with */
ulong mixin = ringSize - 1;
std::stringstream str = new std::stringstream();
if (mixin > maxMixin)
{
str << "Transaction " << transaction.getTransactionHash() << " is not valid. Reason: transaction mixin is too large (" << (int)mixin << "). Maximum mixin allowed is " << (int)maxMixin;
return(new Tuple <bool, string>(false, str.str()));
}
else if (mixin < minMixin)
{
str << "Transaction " << transaction.getTransactionHash() << " is not valid. Reason: transaction mixin is too small (" << (int)mixin << "). Minimum mixin allowed is " << (int)minMixin;
return(new Tuple <bool, string>(false, str.str()));
}
return(new Tuple <bool, string>(true, string()));
}
//--------------------------------------------------------------------------------
private bool print_tx(List <string> args)
{
if (args.Count == 0)
{
Console.Write("expected: print_tx <transaction hash>");
Console.Write("\n");
return(true);
}
string str_hash = args[0];
Crypto.Hash tx_hash = new Crypto.Hash();
if (!parse_hash256(str_hash, tx_hash))
{
return(true);
}
List <Crypto.Hash> tx_ids = new List <Crypto.Hash>();
tx_ids.Add(tx_hash);
List <List <ushort> > txs = new List <List <ushort> >();
List <Crypto.Hash> missed_ids = new List <Crypto.Hash>();
m_core.getTransactions(tx_ids, txs, missed_ids);
if (1 == txs.Count)
{
CryptoNote.CachedTransaction tx = new CryptoNote.CachedTransaction(new List <List <ushort> >(txs[0]));
GlobalMembers.print_as_json(tx.getTransaction());
}
else
{
Console.Write("transaction wasn't found: <");
Console.Write(str_hash);
Console.Write('>');
Console.Write("\n");
}
return(true);
}
