public SmartCoin(SmartTransaction transaction, uint outputIndex, HdPubKey pubKey)
{
Transaction = transaction;
Index = outputIndex;
_transactionId = new Lazy <uint256>(() => Transaction.GetHash(), true);
_outPoint = new Lazy <OutPoint>(() => new OutPoint(TransactionId, Index), true);
_txOut = new Lazy <TxOut>(() => Transaction.Transaction.Outputs[Index], true);
_coin = new Lazy <Coin>(() => new Coin(OutPoint, TxOut), true);
_hashCode = new Lazy <int>(() => OutPoint.GetHashCode(), true);
Height = transaction.Height;
HdPubKey = pubKey;
Transaction.WalletOutputs.Add(this);
}