public void UntrustedHashTransactionInputStart(bool newTransaction, IndexedTxIn txIn, TrustedInput[] trustedInputs)
{
using(Transport.Lock())
{
trustedInputs = trustedInputs ?? new TrustedInput[0];
// Start building a fake transaction with the passed inputs
MemoryStream data = new MemoryStream();
BufferUtils.WriteBuffer(data, txIn.Transaction.Version);
VarintUtils.write(data, txIn.Transaction.Inputs.Count);
ExchangeApdu(LedgerWalletConstants.LedgerWallet_CLA, LedgerWalletConstants.LedgerWallet_INS_HASH_INPUT_START, (byte)0x00, (newTransaction ? (byte)0x00 : (byte)0x80), data.ToArray(), OK);
// Loop for each input
long currentIndex = 0;
foreach(var input in txIn.Transaction.Inputs)
{
var trustedInput = trustedInputs.FirstOrDefault(i => i.OutPoint == input.PrevOut);
byte[] script = (currentIndex == txIn.Index ? txIn.TxIn.ScriptSig.ToBytes() : new byte[0]);
data = new MemoryStream();
if(trustedInput != null)
{
data.WriteByte(0x01);
var b = trustedInput.ToBytes();
// untrusted inputs have constant length
data.WriteByte((byte)b.Length);
BufferUtils.WriteBuffer(data, b);
}
else
{
data.WriteByte(0x00);
BufferUtils.WriteBuffer(data, input.PrevOut);
}
VarintUtils.write(data, script.Length);
ExchangeApdu(LedgerWalletConstants.LedgerWallet_CLA, LedgerWalletConstants.LedgerWallet_INS_HASH_INPUT_START, (byte)0x80, (byte)0x00, data.ToArray(), OK);
data = new MemoryStream();
BufferUtils.WriteBuffer(data, script);
BufferUtils.WriteBuffer(data, input.Sequence);
ExchangeApduSplit(LedgerWalletConstants.LedgerWallet_CLA, LedgerWalletConstants.LedgerWallet_INS_HASH_INPUT_START, (byte)0x80, (byte)0x00, data.ToArray(), OK);
currentIndex++;
}
}
}
public void UntrustedHashTransactionInputStart(bool newTransaction, Transaction tx, int index, TrustedInput[] trustedInputs)
{
UntrustedHashTransactionInputStart(newTransaction, tx.Inputs.AsIndexedInputs().Skip(index).First(), trustedInputs);
}