static async Task SignBitcoinTransactionAsync()
{
//get address path for address in Trezor
var addressPath = AddressPathBase.Parse <BIP44AddressPath>("m/49'/0'/0'/0/0").ToArray();
// previous unspent input of Transaction
var txInput = new TxInputType()
{
AddressNs = addressPath,
Amount = 100837,
ScriptType = InputScriptType.Spendp2shwitness,
PrevHash = "3becf448ae38cf08c0db3c6de2acb8e47acf6953331a466fca76165fdef1ccb7".ToBytes(), // transaction ID
PrevIndex = 0,
Sequence = 4294967293 // Sequence number represent Replace By Fee 4294967293 or leave empty for default
};
// TX we want to make a payment
var txOut = new TxOutputType()
{
AddressNs = new uint[0],
Amount = 100837,
Address = "18UxSJMw7D4UEiRqWkArN1Lq7VSGX6qH3H",
ScriptType = OutputScriptType.Paytoaddress // if is segwit use Spendp2shwitness
};
// Must be filled with basic data like below
var signTx = new SignTx()
{
Expiry = 0,
LockTime = 0,
CoinName = "Bitcoin",
Version = 2,
OutputsCount = 1,
InputsCount = 1
};
Log.Information($"TxSignature: {await _soterDevice.SignTransactionAsync(signTx, new List<TxInputType> { txInput }, new List<TxOutputType> { txOut })}");
}
public async Task SignBitcoinTransactionAsync()
{
// initialize connection with device
await GetAndInitialize();
//get address path for address in Trezor
var addressPath = AddressPathBase.Parse <BIP44AddressPath>("m/49'/0'/0'/0/0").ToArray();
// previous unspent input of Transaction
var txInput = new TxInputType()
{
AddressNs = addressPath,
Amount = 100837,
ScriptType = InputScriptType.Spendp2shwitness,
PrevHash = "797ad8727ee672123acfc7bcece06bf648d3833580b1b50246363f3293d9fe20".ToHexBytes(), // transaction ID
PrevIndex = 0,
Sequence = 4294967293 // Sequence number represent Replace By Fee 4294967293 or leave empty for default
};
// TX we want to make a payment
var txOut = new TxOutputType()
{
AddressNs = new uint[0],
Amount = 100837,
Address = "3HN7CbEPY7FiuUKGq51g9e3UegFak1WZb5",
ScriptType = OutputScriptType.Paytoaddress // if is segwit use Spendp2shwitness
};
// Must be filled with basic data like below
var signTx = new SignTx()
{
Expiry = 0,
LockTime = 0,
CoinName = "Bitcoin",
Version = 2,
OutputsCount = 1,
InputsCount = 1
};
// For every TX request from Trezor to us, we response with TxAck like below
var txAck = new TxAck()
{
Tx = new TransactionType()
{
Inputs = { txInput }, // Tx Inputs
Outputs = { txOut }, // Tx Outputs
Expiry = 0,
InputsCnt = 1, // must be exact number of Inputs count
OutputsCnt = 1, // must be exact number of Outputs count
Version = 2
}
};
// If the field serialized.serialized_tx from Trezor is set,
// it contains a chunk of the signed transaction in serialized format.
// The chunks are returned in the right order and just concatenating all returned chunks will result in the signed transaction.
// So we need to add chunks to the list
var serializedTx = new List <byte>();
// We send SignTx() to the Trezor and we wait him to send us Request
var request = await KeepKeyManager.SendMessageAsync <TxRequest, SignTx>(signTx);
// We do loop here since we need to send over and over the same transactions to trezor because his 64 kilobytes memory
// and he will sign chunks and return part of signed chunk in serialized manner, until we receive finall type of Txrequest TxFinished
while (request.RequestType != RequestType.Txfinished)
{
switch (request.RequestType)
{
case RequestType.Txinput:
{
//We send TxAck() with TxInputs
request = await KeepKeyManager.SendMessageAsync <TxRequest, TxAck>(txAck);
// Now we have to check every response is there any SerializedTx chunk
if (request.Serialized != null)
{
// if there is any we add to our list bytes
serializedTx.AddRange(request.Serialized.SerializedTx);
}
break;
}
case RequestType.Txoutput:
{
//We send TxAck() with TxOutputs
request = await KeepKeyManager.SendMessageAsync <TxRequest, TxAck>(txAck);
// Now we have to check every response is there any SerializedTx chunk
if (request.Serialized != null)
{
// if there is any we add to our list bytes
serializedTx.AddRange(request.Serialized.SerializedTx);
}
break;
}
case RequestType.Txextradata:
{
// for now he didn't ask me for extra data :)
break;
}
case RequestType.Txmeta:
{
// for now he didn't ask me for extra Tx meta data :)
break;
}
}
}
Debug.WriteLine($"TxSignature: {serializedTx.ToArray().ToHexCompact()}");
}
