public async Task <IActionResult> WalletSendLedger(
[ModelBinder(typeof(WalletIdModelBinder))]
WalletId walletId, WalletSendLedgerModel vm)
{
if (walletId?.StoreId == null)
{
return(NotFound());
}
var store = await Repository.FindStore(walletId.StoreId, GetUserId());
DerivationSchemeSettings paymentMethod = GetPaymentMethod(walletId, store);
if (paymentMethod == null)
{
return(NotFound());
}
var network = this.NetworkProvider.GetNetwork(walletId?.CryptoCode);
if (network == null)
{
return(NotFound());
}
return(View(vm));
}
public async Task <IActionResult> LedgerConnection(
[ModelBinder(typeof(WalletIdModelBinder))]
WalletId walletId,
string command,
// getinfo
// getxpub
int account = 0,
// sendtoaddress
bool noChange = false,
string destination = null, string amount = null, string feeRate = null, bool substractFees = false, bool disableRBF = false
)
{
if (!HttpContext.WebSockets.IsWebSocketRequest)
{
return(NotFound());
}
var cryptoCode = walletId.CryptoCode;
var storeData = (await Repository.FindStore(walletId.StoreId, GetUserId()));
var derivationSettings = GetPaymentMethod(walletId, storeData);
var webSocket = await HttpContext.WebSockets.AcceptWebSocketAsync();
using (var normalOperationTimeout = new CancellationTokenSource())
using (var signTimeout = new CancellationTokenSource())
{
normalOperationTimeout.CancelAfter(TimeSpan.FromMinutes(30));
var hw = new HardwareWalletService(webSocket);
var model = new WalletSendLedgerModel();
object result = null;
try
{
BTCPayNetwork network = null;
if (cryptoCode != null)
{
network = NetworkProvider.GetNetwork(cryptoCode);
if (network == null)
{
throw new FormatException("Invalid value for crypto code");
}
}
if (destination != null)
{
try
{
BitcoinAddress.Create(destination.Trim(), network.NBitcoinNetwork);
model.Destination = destination.Trim();
}
catch { }
}
if (feeRate != null)
{
try
{
model.FeeSatoshiPerByte = int.Parse(feeRate, CultureInfo.InvariantCulture);
}
catch { }
if (model.FeeSatoshiPerByte <= 0)
{
throw new FormatException("Invalid value for fee rate");
}
}
if (amount != null)
{
try
{
model.Amount = Money.Parse(amount).ToDecimal(MoneyUnit.BTC);
}
catch { }
if (model.Amount <= 0m)
{
throw new FormatException("Invalid value for amount");
}
}
model.SubstractFees = substractFees;
model.NoChange = noChange;
model.DisableRBF = disableRBF;
if (command == "test")
{
result = await hw.Test(normalOperationTimeout.Token);
}
if (command == "sendtoaddress")
{
if (!_dashboard.IsFullySynched(network.CryptoCode, out var summary))
{
throw new Exception($"{network.CryptoCode}: not started or fully synched");
}
var strategy = GetDirectDerivationStrategy(derivationSettings.AccountDerivation);
// Some deployment have the wallet root key path saved in the store blob
// If it does, we only have to make 1 call to the hw to check if it can sign the given strategy,
if (derivationSettings.AccountKeyPath == null || !await hw.CanSign(network, strategy, derivationSettings.AccountKeyPath, normalOperationTimeout.Token))
{
// If the saved wallet key path is not present or incorrect, let's scan the wallet to see if it can sign strategy
var foundKeyPath = await hw.FindKeyPath(network, strategy, normalOperationTimeout.Token);
if (foundKeyPath == null)
{
throw new HardwareWalletException($"This store is not configured to use this ledger");
}
derivationSettings.AccountKeyPath = foundKeyPath;
storeData.SetSupportedPaymentMethod(derivationSettings);
await Repository.UpdateStore(storeData);
}
var psbt = await CreatePSBT(network, derivationSettings, model, normalOperationTimeout.Token);
signTimeout.CancelAfter(TimeSpan.FromMinutes(5));
psbt.PSBT = await hw.SignTransactionAsync(psbt.PSBT, psbt.ChangeAddress?.ScriptPubKey, signTimeout.Token);
if (!psbt.PSBT.TryFinalize(out var errors))
{
throw new Exception($"Error while finalizing the transaction ({new PSBTException(errors).ToString()})");
}
var transaction = psbt.PSBT.ExtractTransaction();
try
{
var broadcastResult = await ExplorerClientProvider.GetExplorerClient(network).BroadcastAsync(transaction);
if (!broadcastResult.Success)
{
throw new Exception($"RPC Error while broadcasting: {broadcastResult.RPCCode} {broadcastResult.RPCCodeMessage} {broadcastResult.RPCMessage}");
}
}
catch (Exception ex)
{
throw new Exception("Error while broadcasting: " + ex.Message);
}
var wallet = _walletProvider.GetWallet(network);
wallet.InvalidateCache(derivationSettings.AccountDerivation);
result = new SendToAddressResult()
{
TransactionId = transaction.GetHash().ToString()
};
}
}
catch (OperationCanceledException)
{ result = new LedgerTestResult()
{
Success = false, Error = "Timeout"
}; }
catch (Exception ex)
{ result = new LedgerTestResult()
{
Success = false, Error = ex.Message
}; }
finally { hw.Dispose(); }
try
{
if (result != null)
{
UTF8Encoding UTF8NOBOM = new UTF8Encoding(false);
var bytes = UTF8NOBOM.GetBytes(JsonConvert.SerializeObject(result, _mvcJsonOptions.Value.SerializerSettings));
await webSocket.SendAsync(new ArraySegment <byte>(bytes), WebSocketMessageType.Text, true, new CancellationTokenSource(2000).Token);
}
}
catch { }
finally
{
await webSocket.CloseSocket();
}
}
return(new EmptyResult());
}
private async Task <CreatePSBTResponse> CreatePSBT(BTCPayNetwork network, DerivationSchemeSettings derivationSettings, WalletSendLedgerModel sendModel, CancellationToken cancellationToken)
{
var nbx = ExplorerClientProvider.GetExplorerClient(network);
CreatePSBTRequest psbtRequest = new CreatePSBTRequest();
CreatePSBTDestination psbtDestination = new CreatePSBTDestination();
psbtRequest.Destinations.Add(psbtDestination);
if (network.SupportRBF)
{
psbtRequest.RBF = !sendModel.DisableRBF;
}
psbtDestination.Destination = BitcoinAddress.Create(sendModel.Destination, network.NBitcoinNetwork);
psbtDestination.Amount = Money.Coins(sendModel.Amount);
psbtRequest.FeePreference = new FeePreference();
psbtRequest.FeePreference.ExplicitFeeRate = new FeeRate(Money.Satoshis(sendModel.FeeSatoshiPerByte), 1);
if (sendModel.NoChange)
{
psbtRequest.ExplicitChangeAddress = psbtDestination.Destination;
}
psbtDestination.SubstractFees = sendModel.SubstractFees;
var psbt = (await nbx.CreatePSBTAsync(derivationSettings.AccountDerivation, psbtRequest, cancellationToken));
if (psbt == null)
{
throw new NotSupportedException("You need to update your version of NBXplorer");
}
if (network.MinFee != null)
{
psbt.PSBT.TryGetFee(out var fee);
if (fee < network.MinFee)
{
psbtRequest.FeePreference = new FeePreference()
{
ExplicitFee = network.MinFee
};
psbt = (await nbx.CreatePSBTAsync(derivationSettings.AccountDerivation, psbtRequest, cancellationToken));
}
}
if (derivationSettings.AccountKeyPath != null && derivationSettings.AccountKeyPath.Indexes.Length != 0)
{
// NBX only know the path relative to the account xpub.
// Here we rebase the hd_keys in the PSBT to have a keypath relative to the root HD so the wallet can sign
// Note that the fingerprint of the hd keys are now 0, which is wrong
// However, hardware wallets does not give a damn, and sometimes does not even allow us to get this fingerprint anyway.
foreach (var o in psbt.PSBT.Inputs.OfType <PSBTCoin>().Concat(psbt.PSBT.Outputs))
{
var rootFP = derivationSettings.RootFingerprint is HDFingerprint fp ? fp : default;
foreach (var keypath in o.HDKeyPaths.ToList())
{
var newKeyPath = derivationSettings.AccountKeyPath.Derive(keypath.Value.Item2);
o.HDKeyPaths.Remove(keypath.Key);
o.HDKeyPaths.Add(keypath.Key, Tuple.Create(rootFP, newKeyPath));
}
}
}
return(psbt);
}
public async Task <IActionResult> WalletSend(
[ModelBinder(typeof(WalletIdModelBinder))]
WalletId walletId, WalletSendModel vm, string command = null, CancellationToken cancellation = default)
{
if (walletId?.StoreId == null)
{
return(NotFound());
}
var store = await Repository.FindStore(walletId.StoreId, GetUserId());
if (store == null)
{
return(NotFound());
}
var network = this.NetworkProvider.GetNetwork(walletId?.CryptoCode);
if (network == null)
{
return(NotFound());
}
vm.SupportRBF = network.SupportRBF;
var destination = ParseDestination(vm.Destination, network.NBitcoinNetwork);
if (destination == null)
{
ModelState.AddModelError(nameof(vm.Destination), "Invalid address");
}
if (vm.Amount.HasValue)
{
if (vm.CurrentBalance == vm.Amount.Value && !vm.SubstractFees)
{
ModelState.AddModelError(nameof(vm.Amount), "You are sending all your balance to the same destination, you should substract the fees");
}
if (vm.CurrentBalance < vm.Amount.Value)
{
ModelState.AddModelError(nameof(vm.Amount), "You are sending more than what you own");
}
}
if (!ModelState.IsValid)
{
return(View(vm));
}
var sendModel = new WalletSendLedgerModel()
{
Destination = vm.Destination,
Amount = vm.Amount.Value,
SubstractFees = vm.SubstractFees,
FeeSatoshiPerByte = vm.FeeSatoshiPerByte,
NoChange = vm.NoChange,
DisableRBF = vm.DisableRBF
};
if (command == "ledger")
{
return(RedirectToAction(nameof(WalletSendLedger), sendModel));
}
else
{
var storeData = (await Repository.FindStore(walletId.StoreId, GetUserId()));
var derivationScheme = GetPaymentMethod(walletId, storeData);
try
{
var psbt = await CreatePSBT(network, derivationScheme, sendModel, cancellation);
return(File(psbt.PSBT.ToBytes(), "application/octet-stream", $"Send-{vm.Amount.Value}-{network.CryptoCode}-to-{destination[0].ToString()}.psbt"));
}
catch (NBXplorerException ex)
{
ModelState.AddModelError(nameof(vm.Amount), ex.Error.Message);
return(View(vm));
}
catch (NotSupportedException)
{
ModelState.AddModelError(nameof(vm.Destination), "You need to update your version of NBXplorer");
return(View(vm));
}
}
}
public async Task <IActionResult> LedgerConnection(
[ModelBinder(typeof(WalletIdModelBinder))]
WalletId walletId,
string command,
// getinfo
// getxpub
int account = 0,
// sendtoaddress
string psbt = null,
string hintChange = null
)
{
if (!HttpContext.WebSockets.IsWebSocketRequest)
{
return(NotFound());
}
var network = NetworkProvider.GetNetwork <BTCPayNetwork>(walletId.CryptoCode);
if (network == null)
{
throw new FormatException("Invalid value for crypto code");
}
var storeData = (await Repository.FindStore(walletId.StoreId, GetUserId()));
var derivationSettings = GetDerivationSchemeSettings(walletId, storeData);
var webSocket = await HttpContext.WebSockets.AcceptWebSocketAsync();
using (var normalOperationTimeout = new CancellationTokenSource())
using (var signTimeout = new CancellationTokenSource())
{
normalOperationTimeout.CancelAfter(TimeSpan.FromMinutes(30));
var hw = new LedgerHardwareWalletService(webSocket);
var model = new WalletSendLedgerModel();
object result = null;
try
{
if (command == "test")
{
result = await hw.Test(normalOperationTimeout.Token);
}
if (command == "sendtoaddress")
{
if (!_dashboard.IsFullySynched(network.CryptoCode, out var summary))
{
throw new Exception($"{network.CryptoCode}: not started or fully synched");
}
var accountKey = derivationSettings.GetSigningAccountKeySettings();
// Some deployment does not have the AccountKeyPath set, let's fix this...
if (accountKey.AccountKeyPath == null)
{
// If the saved wallet key path is not present or incorrect, let's scan the wallet to see if it can sign strategy
var foundKeyPath = await hw.FindKeyPathFromDerivation(network,
derivationSettings.AccountDerivation,
normalOperationTimeout.Token);
accountKey.AccountKeyPath = foundKeyPath ?? throw new HardwareWalletException($"This store is not configured to use this ledger");
storeData.SetSupportedPaymentMethod(derivationSettings);
await Repository.UpdateStore(storeData);
}
// If it has already the AccountKeyPath, we did not looked up for it, so we need to check if we are on the right ledger
else
{
// Checking if ledger is right with the RootFingerprint is faster as it does not need to make a query to the parent xpub,
// but some deployment does not have it, so let's use AccountKeyPath instead
if (accountKey.RootFingerprint == null)
{
var actualPubKey = await hw.GetExtPubKey(network, accountKey.AccountKeyPath, normalOperationTimeout.Token);
if (!derivationSettings.AccountDerivation.GetExtPubKeys().Any(p => p.GetPublicKey() == actualPubKey.GetPublicKey()))
{
throw new HardwareWalletException($"This store is not configured to use this ledger");
}
}
// We have the root fingerprint, we can check the root from it
else
{
var actualPubKey = await hw.GetPubKey(network, new KeyPath(), normalOperationTimeout.Token);
if (actualPubKey.GetHDFingerPrint() != accountKey.RootFingerprint.Value)
{
throw new HardwareWalletException($"This store is not configured to use this ledger");
}
}
}
// Some deployment does not have the RootFingerprint set, let's fix this...
if (accountKey.RootFingerprint == null)
{
accountKey.RootFingerprint = (await hw.GetPubKey(network, new KeyPath(), normalOperationTimeout.Token)).GetHDFingerPrint();
storeData.SetSupportedPaymentMethod(derivationSettings);
await Repository.UpdateStore(storeData);
}
var psbtResponse = new CreatePSBTResponse()
{
PSBT = PSBT.Parse(psbt, network.NBitcoinNetwork),
ChangeAddress = string.IsNullOrEmpty(hintChange) ? null : BitcoinAddress.Create(hintChange, network.NBitcoinNetwork)
};
derivationSettings.RebaseKeyPaths(psbtResponse.PSBT);
signTimeout.CancelAfter(TimeSpan.FromMinutes(5));
psbtResponse.PSBT = await hw.SignTransactionAsync(psbtResponse.PSBT, accountKey.GetRootedKeyPath(), accountKey.AccountKey, psbtResponse.ChangeAddress?.ScriptPubKey, signTimeout.Token);
result = new SendToAddressResult()
{
PSBT = psbtResponse.PSBT.ToBase64()
};
}
}
catch (OperationCanceledException)
{ result = new LedgerTestResult()
{
Success = false, Error = "Timeout"
}; }
catch (Exception ex)
{ result = new LedgerTestResult()
{
Success = false, Error = ex.Message
}; }
finally { hw.Dispose(); }
try
{
if (result != null)
{
UTF8Encoding UTF8NOBOM = new UTF8Encoding(false);
var bytes = UTF8NOBOM.GetBytes(JsonConvert.SerializeObject(result, _mvcJsonOptions.Value.SerializerSettings));
await webSocket.SendAsync(new ArraySegment <byte>(bytes), WebSocketMessageType.Text, true, new CancellationTokenSource(2000).Token);
}
}
catch { }
finally
{
await webSocket.CloseSocket();
}
}
return(new EmptyResult());
}
private async Task <CreatePSBTResponse> CreatePSBT(BTCPayNetwork network, DerivationStrategyBase derivationScheme, WalletSendLedgerModel sendModel, CancellationToken cancellationToken)
{
var nbx = ExplorerClientProvider.GetExplorerClient(network);
CreatePSBTRequest psbtRequest = new CreatePSBTRequest();
CreatePSBTDestination psbtDestination = new CreatePSBTDestination();
psbtRequest.Destinations.Add(psbtDestination);
if (network.SupportRBF)
{
psbtRequest.RBF = !sendModel.DisableRBF;
}
psbtDestination.Destination = BitcoinAddress.Create(sendModel.Destination, network.NBitcoinNetwork);
psbtDestination.Amount = Money.Coins(sendModel.Amount);
psbtRequest.FeePreference = new FeePreference();
psbtRequest.FeePreference.ExplicitFeeRate = new FeeRate(Money.Satoshis(sendModel.FeeSatoshiPerByte), 1);
if (sendModel.NoChange)
{
psbtRequest.ExplicitChangeAddress = psbtDestination.Destination;
}
psbtDestination.SubstractFees = sendModel.SubstractFees;
var psbt = (await nbx.CreatePSBTAsync(derivationScheme, psbtRequest, cancellationToken));
if (psbt == null)
{
throw new NotSupportedException("You need to update your version of NBXplorer");
}
if (network.MinFee != null)
{
psbt.PSBT.TryGetFee(out var fee);
if (fee < network.MinFee)
{
psbtRequest.FeePreference = new FeePreference()
{
ExplicitFee = network.MinFee
};
psbt = (await nbx.CreatePSBTAsync(derivationScheme, psbtRequest, cancellationToken));
}
}
return(psbt);
}
