public void CorrectAmountText(string amount, bool expectedResult, string expectedCorrection)
{
var result = BitcoinInput.TryCorrectAmount(amount, out var correction);
Assert.Equal(expectedCorrection, correction);
Assert.Equal(expectedResult, result);
}
/// <summary>
/// Reads a single transaction off the blockchain in sequential order
///
/// thanks
/// https://en.bitcoin.it/wiki/Protocol_specification#block
/// http://james.lab6.com/2012/01/12/bitcoin-285-bytes-that-changed-the-world/
/// https://code.google.com/p/blockchain/source/browse/trunk/BlockChain.h
/// </summary>
public Boolean Read()
{
var newBlock = new BitcoinBlock {
MagicBytes = Dequeue(4)
};
if (BitConverter.ToUInt32(newBlock.MagicBytes, 0) != 3652501241)
{
throw new Exception("Invalid magic number at the start of this block");
}
newBlock.BlockSize = BitConverter.ToUInt32(Dequeue(4), 0);
newBlock.BlockFormatVersion = BitConverter.ToUInt32(Dequeue(4), 0);
newBlock.PreviousBlockHash = ReverseArray(Dequeue(32));
newBlock.MerkleRoot = ReverseArray(Dequeue(32));
newBlock.TimeStamp = Helper.UnixToDateTime(BitConverter.ToUInt32(Dequeue(4), 0));
newBlock.Bits = BitConverter.ToUInt32(Dequeue(4), 0);
newBlock.Nonce = BitConverter.ToUInt32(Dequeue(4), 0);
newBlock.TransactionCount = ReadVariableLengthInteger(Dequeue(1));
for (var t = 0; t < newBlock.TransactionCount; t++)
{
var newTransaction = new BitcoinTransaction();
newTransaction.TransactionVersionNumber = BitConverter.ToUInt32(Dequeue(4), 0);
newTransaction.InputCount = ReadVariableLengthInteger(Dequeue(1));
for (var i = 0; i < newTransaction.InputCount; i++)
{
var newInput = new BitcoinInput();
newInput.InputTransactionHash = Dequeue(32);
newInput.InputTransactionIndex = BitConverter.ToUInt32(Dequeue(4), 0);
newInput.ResponseScriptLength = ReadVariableLengthInteger(Dequeue(1));
newInput.ResponseScript = Dequeue((int)newInput.ResponseScriptLength);
newInput.SequenceNumber = BitConverter.ToUInt32(Dequeue(4), 0);
newTransaction.Inputs.Add(newInput);
}
newTransaction.OutputCount = ReadVariableLengthInteger(Dequeue(1));
for (var o = 0; o < newTransaction.OutputCount; o++)
{
var newOutput = new BitcoinOutput();
newOutput.OutputValue = BitConverter.ToUInt64(Dequeue(8), 0);
newOutput.ChallengeScriptLength = ReadVariableLengthInteger(Dequeue(1));
newOutput.ChallengeScript = Dequeue((int)newOutput.ChallengeScriptLength);
newOutput.EcdsaPublickey = ExtractPublicKey(newOutput.ChallengeScript);
newOutput.BitcoinAddress = ComputeBitcoinAddress(newOutput.EcdsaPublickey); // todo: expensive operation, should it be a feature flag?
newTransaction.Outputs.Add(newOutput);
}
newTransaction.LockTime = BitConverter.ToUInt32(Dequeue(4), 0);
newBlock.Transactions.Add(newTransaction);
}
CurrentBlock = newBlock;
return(true);
}
protected SendControlViewModel(Wallet wallet, string title)
: base(title)
{
Global = Locator.Current.GetService <Global>();
Wallet = wallet;
LabelSuggestion = new SuggestLabelViewModel();
_buildTransactionButtonText = DoButtonText;
this.ValidateProperty(x => x.Address, ValidateAddress);
this.ValidateProperty(x => x.CustomChangeAddress, ValidateCustomChangeAddress);
this.ValidateProperty(x => x.Password, ValidatePassword);
this.ValidateProperty(x => x.UserFeeText, ValidateUserFeeText);
ResetUi();
CoinList = new CoinListViewModel(Wallet, Global.Config, Global.UiConfig, displayCommonOwnershipWarning: true);
Observable.FromEventPattern(CoinList, nameof(CoinList.SelectionChanged))
.ObserveOn(RxApp.MainThreadScheduler)
.Subscribe(_ => SetFeesAndTexts());
_minMaxFeeTargetsEqual = this.WhenAnyValue(x => x.MinimumFeeTarget, x => x.MaximumFeeTarget, (x, y) => x == y)
.ToProperty(this, x => x.MinMaxFeeTargetsEqual, scheduler: RxApp.MainThreadScheduler);
SetFeeTargetLimits();
FeeTarget = Global.UiConfig.FeeTarget;
FeeDisplayFormat = (FeeDisplayFormat)(Enum.ToObject(typeof(FeeDisplayFormat), Global.UiConfig.FeeDisplayFormat) ?? FeeDisplayFormat.SatoshiPerByte);
SetFeesAndTexts();
this.WhenAnyValue(x => x.AmountText)
.ObserveOn(RxApp.MainThreadScheduler)
.Subscribe(x =>
{
if (Money.TryParse(x.TrimStart('~', ' '), out Money amountBtc))
{
SetAmountWatermark(amountBtc);
}
else
{
SetAmountWatermark(Money.Zero);
}
SetFees();
});
AmountKeyUpCommand = ReactiveCommand.Create((KeyEventArgs key) =>
{
if (IsMax)
{
SetFeesAndTexts();
}
else if (BitcoinInput.TryCorrectAmount(AmountText, out var betterAmount))
{
AmountText = betterAmount;
}
});
this.WhenAnyValue(x => x.IsBusy, x => x.IsHardwareBusy)
.ObserveOn(RxApp.MainThreadScheduler)
.Subscribe(_ => BuildTransactionButtonText = IsHardwareBusy
? WaitingForHardwareWalletButtonTextString
: IsBusy
? DoingButtonText
: DoButtonText);
Observable
.Merge(this.WhenAnyValue(x => x.FeeTarget).Select(_ => true))
.Merge(this.WhenAnyValue(x => x.IsEstimateAvailable).Select(_ => true))
.ObserveOn(RxApp.MainThreadScheduler)
.Subscribe(_ =>
{
IsSliderFeeUsed = IsEstimateAvailable;
SetFeesAndTexts();
});
this.WhenAnyValue(x => x.IsSliderFeeUsed)
.ObserveOn(RxApp.MainThreadScheduler)
.Subscribe(enabled => FeeControlOpacity = enabled ? 1 : 0.5); // Give the control the disabled feeling. Real Disable it not a solution as we have to detect if the slider is moved.
MaxCommand = ReactiveCommand.Create(() => IsMax = !IsMax, outputScheduler: RxApp.MainThreadScheduler);
this.WhenAnyValue(x => x.IsMax)
.ObserveOn(RxApp.MainThreadScheduler)
.Subscribe(_ =>
{
if (IsMax)
{
SetFeesAndTexts();
LabelToolTip = "Spending whole coins does not generate change, thus labeling is unnecessary.";
}
else
{
AmountText = "0.0";
LabelToolTip = "Who can link this transaction to you? E.g.: \"Max, BitPay\"";
}
});
// Triggering the detection of same address values.
this.WhenAnyValue(x => x.Address)
.ObserveOn(RxApp.MainThreadScheduler)
.Subscribe(_ => this.RaisePropertyChanged(nameof(CustomChangeAddress)));
this.WhenAnyValue(x => x.CustomChangeAddress)
.ObserveOn(RxApp.MainThreadScheduler)
.Subscribe(_ => this.RaisePropertyChanged(nameof(Address)));
this.WhenAnyValue(x => x.IsCustomChangeAddressVisible)
.ObserveOn(RxApp.MainThreadScheduler)
.Subscribe(_ =>
{
this.RaisePropertyChanged(nameof(Address));
this.RaisePropertyChanged(nameof(CustomChangeAddress));
});
FeeRateCommand = ReactiveCommand.Create(ChangeFeeRateDisplay, outputScheduler: RxApp.MainThreadScheduler);
OnAddressPasteCommand = ReactiveCommand.Create((BitcoinUrlBuilder url) => OnAddressPaste(url));
BuildTransactionCommand = ReactiveCommand.CreateFromTask(async() =>
{
try
{
IsBusy = true;
MainWindowViewModel.Instance.StatusBar.TryAddStatus(StatusType.BuildingTransaction);
var label = new SmartLabel(LabelSuggestion.Label);
LabelSuggestion.Label = label;
if (!IsMax && label.IsEmpty)
{
NotificationHelpers.Warning("Label is required.", "");
return;
}
var selectedCoinViewModels = CoinList.Coins.Where(cvm => cvm.IsSelected);
var selectedCoinReferences = selectedCoinViewModels.Select(cvm => cvm.Model.OutPoint).ToList();
if (!selectedCoinReferences.Any())
{
NotificationHelpers.Warning("No coins are selected to spend.", "");
return;
}
BitcoinAddress address;
try
{
address = BitcoinAddress.Create(Address, Global.Network);
}
catch (FormatException)
{
NotificationHelpers.Warning("Invalid address.", "");
return;
}
var requests = new List <DestinationRequest>();
if (IsCustomChangeAddressVisible && !string.IsNullOrWhiteSpace(CustomChangeAddress))
{
try
{
var customChangeAddress = BitcoinAddress.Create(CustomChangeAddress, Global.Network);
if (customChangeAddress == address)
{
NotificationHelpers.Warning("The active address and the change address cannot be the same.", "");
return;
}
requests.Add(new DestinationRequest(customChangeAddress, MoneyRequest.CreateChange(subtractFee: true), label));
}
catch (FormatException)
{
NotificationHelpers.Warning("Invalid custom change address.", "");
return;
}
}
MoneyRequest moneyRequest;
if (IsMax)
{
moneyRequest = MoneyRequest.CreateAllRemaining(subtractFee: true);
}
else
{
if (!Money.TryParse(AmountText, out Money amount) || amount == Money.Zero)
{
NotificationHelpers.Warning("Invalid amount.");
return;
}
if (amount == selectedCoinViewModels.Sum(x => x.Amount))
{
NotificationHelpers.Warning("Looks like you want to spend whole coins. Try Max button instead.", "");
return;
}
moneyRequest = MoneyRequest.Create(amount, subtractFee: false);
}
if (FeeRate is null || FeeRate.SatoshiPerByte < 1)
{
NotificationHelpers.Warning("Invalid fee rate.", "");
return;
}
var feeStrategy = FeeStrategy.CreateFromFeeRate(FeeRate);
var activeDestinationRequest = new DestinationRequest(address, moneyRequest, label);
requests.Add(activeDestinationRequest);
var intent = new PaymentIntent(requests);
try
{
MainWindowViewModel.Instance.StatusBar.TryAddStatus(StatusType.DequeuingSelectedCoins);
OutPoint[] toDequeue = selectedCoinViewModels.Where(x => x.CoinJoinInProgress).Select(x => x.Model.OutPoint).ToArray();
if (toDequeue is { } && toDequeue.Any())
{
await Wallet.ChaumianClient.DequeueCoinsFromMixAsync(toDequeue, DequeueReason.TransactionBuilding);
}
}
catch
{
NotificationHelpers.Error("Cannot spend mixing coins.", "");
return;
}
finally
{
MainWindowViewModel.Instance.StatusBar.TryRemoveStatus(StatusType.DequeuingSelectedCoins);
}
if (!Wallet.KeyManager.IsWatchOnly)
{
try
{
PasswordHelper.GetMasterExtKey(Wallet.KeyManager, Password, out var compatiblityPasswordUsed); // We could use TryPassword but we need the exception.
if (compatiblityPasswordUsed is { })
{
Password = compatiblityPasswordUsed; // Overwrite the password for BuildTransaction function.
NotificationHelpers.Warning(PasswordHelper.CompatibilityPasswordWarnMessage);
}
}
catch (SecurityException ex)
{
NotificationHelpers.Error(ex.Message, "");
return;
}
catch (Exception ex)
{
Logger.LogError(ex);
NotificationHelpers.Error(ex.ToUserFriendlyString());
return;
}
}
public void ParseSatoshiFeeText(bool isValid, string feeText)
{
Assert.Equal(isValid, BitcoinInput.TryParseSatoshiFeeText(feeText, out var _));
}