public async Task <TrustedInput> GetTrustedInputAsync(Transaction transaction, int outputIndex, CancellationToken cancellation = default(CancellationToken))
{
if (outputIndex >= transaction.Outputs.Count)
{
throw new ArgumentOutOfRangeException("outputIndex is bigger than the number of outputs in the transaction", "outputIndex");
}
List <byte[]> apdus = new List <byte[]>();
MemoryStream data = new MemoryStream();
// Header
BufferUtils.WriteUint32BE(data, outputIndex);
BufferUtils.WriteBuffer(data, transaction.Version);
VarintUtils.write(data, transaction.Inputs.Count);
apdus.Add(CreateAPDU(LedgerWalletConstants.LedgerWallet_CLA, LedgerWalletConstants.LedgerWallet_INS_GET_TRUSTED_INPUT, (byte)0x00, (byte)0x00, data.ToArray()));
// Each input
foreach (var input in transaction.Inputs)
{
data = new MemoryStream();
BufferUtils.WriteBuffer(data, input.PrevOut);
VarintUtils.write(data, input.ScriptSig.Length);
apdus.Add(CreateAPDU(LedgerWalletConstants.LedgerWallet_CLA, LedgerWalletConstants.LedgerWallet_INS_GET_TRUSTED_INPUT, (byte)0x80, (byte)0x00, data.ToArray()));
data = new MemoryStream();
BufferUtils.WriteBuffer(data, input.ScriptSig.ToBytes());
apdus.AddRange(CreateApduSplit2(LedgerWalletConstants.LedgerWallet_CLA, LedgerWalletConstants.LedgerWallet_INS_GET_TRUSTED_INPUT, (byte)0x80, (byte)0x00, data.ToArray(), Utils.ToBytes(input.Sequence, true)));
}
// Number of outputs
data = new MemoryStream();
VarintUtils.write(data, transaction.Outputs.Count);
apdus.Add(CreateAPDU(LedgerWalletConstants.LedgerWallet_CLA, LedgerWalletConstants.LedgerWallet_INS_GET_TRUSTED_INPUT, (byte)0x80, (byte)0x00, data.ToArray()));
// Each output
foreach (var output in transaction.Outputs)
{
data = new MemoryStream();
BufferUtils.WriteBuffer(data, Utils.ToBytes((ulong)output.Value.Satoshi, true));
VarintUtils.write(data, output.ScriptPubKey.Length);
apdus.Add(CreateAPDU(LedgerWalletConstants.LedgerWallet_CLA, LedgerWalletConstants.LedgerWallet_INS_GET_TRUSTED_INPUT, (byte)0x80, (byte)0x00, data.ToArray()));
data = new MemoryStream();
BufferUtils.WriteBuffer(data, output.ScriptPubKey.ToBytes());
apdus.AddRange(CreateAPDUSplit(LedgerWalletConstants.LedgerWallet_CLA, LedgerWalletConstants.LedgerWallet_INS_GET_TRUSTED_INPUT, (byte)0x80, (byte)0x00, data.ToArray()));
}
// Locktime
apdus.Add(CreateAPDU(LedgerWalletConstants.LedgerWallet_CLA, LedgerWalletConstants.LedgerWallet_INS_GET_TRUSTED_INPUT, (byte)0x80, (byte)0x00, transaction.LockTime.ToBytes()));
byte[] response = await ExchangeApdusAsync(apdus.ToArray(), OK, cancellation).ConfigureAwait(false);
return(new TrustedInput(response));
}
private List <byte[]> GetTrustedInputAPDUs(Transaction transaction, int outputIndex)
{
if (outputIndex >= transaction.Outputs.Count)
{
throw new ArgumentOutOfRangeException("outputIndex is bigger than the number of outputs in the transaction", "outputIndex");
}
var apdus = new List <byte[]>();
var data = new MemoryStream();
// Header
BufferUtils.WriteUint32BE(data, outputIndex);
BufferUtils.WriteBuffer(data, transaction.Version);
VarintUtils.write(data, transaction.Inputs.Count);
apdus.Add(CreateAPDU(LedgerWalletConstants.LedgerWallet_CLA, LedgerWalletConstants.LedgerWallet_INS_GET_TRUSTED_INPUT, 0x00, 0x00, data.ToArray()));
// Each input
foreach (var input in transaction.Inputs)
{
data = new MemoryStream();
BufferUtils.WriteBuffer(data, input.PrevOut);
VarintUtils.write(data, input.ScriptSig.Length);
apdus.Add(CreateAPDU(LedgerWalletConstants.LedgerWallet_CLA, LedgerWalletConstants.LedgerWallet_INS_GET_TRUSTED_INPUT, 0x80, 0x00, data.ToArray()));
data = new MemoryStream();
BufferUtils.WriteBuffer(data, input.ScriptSig.ToBytes());
apdus.AddRange(CreateApduSplit2(LedgerWalletConstants.LedgerWallet_CLA, LedgerWalletConstants.LedgerWallet_INS_GET_TRUSTED_INPUT, 0x80, 0x00, data.ToArray(), Utils.ToBytes(input.Sequence, true)));
}
// Number of outputs
data = new MemoryStream();
VarintUtils.write(data, transaction.Outputs.Count);
apdus.Add(CreateAPDU(LedgerWalletConstants.LedgerWallet_CLA, LedgerWalletConstants.LedgerWallet_INS_GET_TRUSTED_INPUT, 0x80, 0x00, data.ToArray()));
// Each output
foreach (var output in transaction.Outputs)
{
data = new MemoryStream();
BufferUtils.WriteBuffer(data, Utils.ToBytes((ulong)output.Value.Satoshi, true));
VarintUtils.write(data, output.ScriptPubKey.Length);
apdus.Add(CreateAPDU(LedgerWalletConstants.LedgerWallet_CLA, LedgerWalletConstants.LedgerWallet_INS_GET_TRUSTED_INPUT, 0x80, 0x00, data.ToArray()));
data = new MemoryStream();
BufferUtils.WriteBuffer(data, output.ScriptPubKey.ToBytes());
apdus.AddRange(CreateAPDUSplit(LedgerWalletConstants.LedgerWallet_CLA, LedgerWalletConstants.LedgerWallet_INS_GET_TRUSTED_INPUT, 0x80, 0x00, data.ToArray()));
}
// Locktime
apdus.Add(CreateAPDU(LedgerWalletConstants.LedgerWallet_CLA, LedgerWalletConstants.LedgerWallet_INS_GET_TRUSTED_INPUT, 0x80, 0x00, transaction.LockTime.ToBytes()));
return(apdus);
}
public byte[][] UntrustedHashTransactionInputStart(bool newTransaction, IndexedTxIn txIn, TrustedInput[] trustedInputs)
{
List <byte[]> apdus = new List <byte[]>();
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);
apdus.Add(CreateAPDU(LedgerWalletConstants.LedgerWallet_CLA, LedgerWalletConstants.LedgerWallet_INS_HASH_INPUT_START, (byte)0x00, (newTransaction ? (byte)0x00 : (byte)0x80), data.ToArray()));
// 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);
apdus.Add(CreateAPDU(LedgerWalletConstants.LedgerWallet_CLA, LedgerWalletConstants.LedgerWallet_INS_HASH_INPUT_START, (byte)0x80, (byte)0x00, data.ToArray()));
data = new MemoryStream();
BufferUtils.WriteBuffer(data, script);
BufferUtils.WriteBuffer(data, input.Sequence);
apdus.AddRange(CreateAPDUSplit(LedgerWalletConstants.LedgerWallet_CLA, LedgerWalletConstants.LedgerWallet_INS_HASH_INPUT_START, (byte)0x80, (byte)0x00, data.ToArray()));
currentIndex++;
}
return(apdus.ToArray());
}
public byte[][] UntrustedHashTransactionInputStart(
InputStartType startType,
IndexedTxIn txIn,
Dictionary <OutPoint, TrustedInput> trustedInputs,
Dictionary <OutPoint, ICoin> coins,
bool segwitMode, bool segwitParsedOnce)
{
List <byte[]> apdus = new List <byte[]>();
trustedInputs = trustedInputs ?? new Dictionary <OutPoint, TrustedInput>();
// Start building a fake transaction with the passed inputs
MemoryStream data = new MemoryStream();
BufferUtils.WriteBuffer(data, txIn.Transaction.Version);
if (segwitMode && segwitParsedOnce)
{
VarintUtils.write(data, 1);
}
else
{
VarintUtils.write(data, txIn.Transaction.Inputs.Count);
}
apdus.Add(CreateAPDU(LedgerWalletConstants.LedgerWallet_CLA, LedgerWalletConstants.LedgerWallet_INS_HASH_INPUT_START, (byte)0x00, (byte)startType, data.ToArray()));
// Loop for each input
long currentIndex = 0;
foreach (var input in txIn.Transaction.Inputs)
{
if (segwitMode && segwitParsedOnce && currentIndex != txIn.Index)
{
currentIndex++;
continue;
}
byte[] script = new byte[0];
if (currentIndex == txIn.Index || segwitMode && !segwitParsedOnce)
{
script = coins[input.PrevOut].GetScriptCode().ToBytes();
}
data = new MemoryStream();
if (segwitMode)
{
data.WriteByte(0x02);
BufferUtils.WriteBuffer(data, input.PrevOut);
BufferUtils.WriteBuffer(data, Utils.ToBytes((ulong)coins[input.PrevOut].TxOut.Value.Satoshi, true));
}
else
{
var trustedInput = trustedInputs[input.PrevOut];
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);
apdus.Add(CreateAPDU(LedgerWalletConstants.LedgerWallet_CLA, LedgerWalletConstants.LedgerWallet_INS_HASH_INPUT_START, (byte)0x80, (byte)0x00, data.ToArray()));
data = new MemoryStream();
BufferUtils.WriteBuffer(data, script);
BufferUtils.WriteBuffer(data, input.Sequence);
apdus.AddRange(CreateAPDUSplit(LedgerWalletConstants.LedgerWallet_CLA, LedgerWalletConstants.LedgerWallet_INS_HASH_INPUT_START, (byte)0x80, (byte)0x00, data.ToArray()));
currentIndex++;
}
return(apdus.ToArray());
}
