/// <summary>
///
/// </summary>
/// <param name="senderAddress">node's public key</param>
/// <param name="receiverAddress">the receiver node's public key</param>
/// <param name="privateKeyCointainer">i.e the private key of the sender to sign the tx ins</param>
/// <param name="amount"></param>
/// <param name="unspentTxOuts"></param>
/// <param name="pool"></param>
/// <returns></returns>
public static Transaction CreateTransaction(string senderAddress, string receiverAddress, CspParameters privateKeyCointainer, int amount, IEnumerable <UnspentTxOut> unspentTxOuts, TransactionPool pool)
{
List <UnspentTxOut> myUnspentTxOuts = unspentTxOuts.Where(uto => uto.address == senderAddress).ToList();
// Remove unspent tx outs already used in any unverified transaction of the pool
List <TxIn> poolTxIns = pool.GetTransactions().SelectMany(t => t.txIns).ToList();
myUnspentTxOuts = myUnspentTxOuts.Where(uto => !poolTxIns.Any(ti => ti.txOutTxId == uto.txId && ti.txOutIndex == uto.txOutIndex)).ToList();
// Find unspent tx outs to fund the transaction
List <Transaction.UnspentTxOut> unspentTxOutsToUse = new List <Transaction.UnspentTxOut>();
int currentAmount = 0;
for (int i = 0; i < myUnspentTxOuts.Count() && currentAmount < amount; i++)
{
unspentTxOutsToUse.Add(myUnspentTxOuts.ElementAt(i));
currentAmount += myUnspentTxOuts.ElementAt(i).amount;
}
if (currentAmount < amount)
{
Debug.LogError("Insufficiant balance");
return(null);
}
int leftOver = currentAmount - amount;
TxIn[] txIns = unspentTxOutsToUse.Select(uto => new TxIn(uto.txId, uto.txOutIndex)).ToArray();
// Create corresponding tx outs (with eventual leftover sent back to sender
TxOut[] txOuts;
if (leftOver == 0)
{
txOuts = new TxOut[] { new TxOut(receiverAddress, amount) }
}
;
else
{
txOuts = new TxOut[] { new TxOut(receiverAddress, amount), new TxOut(senderAddress, leftOver) }
};
Transaction transaction = new Transaction();
transaction.txIns = txIns;
transaction.txOuts = txOuts;
transaction.ComputeAndSetId();
transaction.SignTxIns(privateKeyCointainer, unspentTxOuts);
return(transaction);
}
public Transaction[] GetPooledTransactions()
{
return(transactionPool.GetTransactions());
}
