public override uint addOutput(ulong amount, AccountPublicAddress to)
{
checkIfSigning();
KeyOutput outKey = new KeyOutput();
GlobalMembers.derivePublicKey(to, txSecretKey(), transaction.outputs.Count, outKey.key);
TransactionOutput @out = new TransactionOutput(amount, outKey);
transaction.outputs.emplace_back(@out);
invalidateHash();
return(transaction.outputs.Count - 1);
}