private async void OnInit(object sender, EventArgs args)
{
Initializing -= OnInit;
while (Global.Wallet.State < WalletState.Initialized)
{
await Task.Delay(200);
}
Device.BeginInvokeOnMainThread(() =>
{
CoinList = new CoinListViewModel();
Observable.FromEventPattern(Global.Wallet.TransactionProcessor, nameof(Global.Wallet.TransactionProcessor.WalletRelevantTransactionProcessed))
.Throttle(TimeSpan.FromSeconds(0.1))
.ObserveOn(RxApp.MainThreadScheduler)
.Subscribe(_ =>
{
Balance = Global.Wallet.Coins.TotalAmount().ToString();
HasPrivateCoins = Enumerable.Where(
Global.Wallet.Coins,
c => c.Unspent && !c.SpentAccordingToBackend && c.AnonymitySet > 1
).Sum(c => (long?)c.Amount) > 0;
});
Observable.FromEventPattern(Global.Wallet, nameof(Global.Wallet.NewBlockProcessed))
.Merge(Observable.FromEventPattern(Global.Wallet.TransactionProcessor, nameof(Global.Wallet.TransactionProcessor.WalletRelevantTransactionProcessed)))
.Throttle(TimeSpan.FromSeconds(3))
.ObserveOn(RxApp.MainThreadScheduler)
.Subscribe(async _ => await TryRewriteTableAsync());
CoinJoinViewModel = new CoinJoinViewModel(CoinList);
SendAmountViewModel = new SendAmountViewModel(CoinList);
});
}
public SendViewModel(IScreen hostScreen) : base(hostScreen)
{
CoinList = new CoinListViewModel(hostScreen);
AmountText = "0.0";
this.WhenAnyValue(x => x.AmountText)
.ObserveOn(RxApp.MainThreadScheduler)
.Subscribe(amount =>
{
// Correct amount
Regex digitsOnly = new Regex(@"[^\d,.]");
string betterAmount = digitsOnly.Replace(amount, ""); // Make it digits , and . only.
betterAmount = betterAmount.Replace(',', '.');
int countBetterAmount = betterAmount.Count(x => x == '.');
if (countBetterAmount > 1) // Do not enable typing two dots.
{
var index = betterAmount.IndexOf('.', betterAmount.IndexOf('.') + 1);
if (index > 0)
{
betterAmount = betterAmount.Substring(0, index);
}
}
var dotIndex = betterAmount.IndexOf('.');
if (dotIndex != -1 && betterAmount.Length - dotIndex > 8) // Enable max 8 decimals.
{
betterAmount = betterAmount.Substring(0, dotIndex + 1 + 8);
}
if (betterAmount != amount)
{
AmountText = betterAmount;
}
});
BuildTransactionCommand = ReactiveCommand.CreateFromTask(async() =>
{
try
{
IsBusy = true;
Password = Guard.Correct(Password);
Memo = Memo.Trim(',', ' ').Trim();
var selectedCoinViewModels = CoinList.Coins.Where(cvm => cvm.IsSelected);
var selectedCoinReferences = selectedCoinViewModels.Select(cvm => new TxoRef(cvm.Model.TransactionId, cvm.Model.Index)).ToList();
if (!selectedCoinReferences.Any())
{
//SetWarningMessage("No coins are selected to spend.");
return;
}
BitcoinAddress address;
try
{
address = BitcoinAddress.Create(Address.Trim(), Global.Network);
}
catch (FormatException)
{
// SetWarningMessage("Invalid address.");
return;
}
var script = address.ScriptPubKey;
var amount = Money.Zero;
if (!Money.TryParse(AmountText, out amount) || amount == Money.Zero)
{
// SetWarningMessage($"Invalid amount.");
return;
}
if (amount == selectedCoinViewModels.Sum(x => x.Amount))
{
// SetWarningMessage("Looks like you want to spend a whole coin. Try Max button instead.");
return;
}
var memo = Memo;
var operation = new WalletService.Operation(script, amount, memo);
var feeTarget = 500;
var result = await Task.Run(() => Global.WalletService.BuildTransaction(Password, new[] { operation }, feeTarget, allowUnconfirmed: true, allowedInputs: selectedCoinReferences));
SmartTransaction signedTransaction = result.Transaction;
await Task.Run(async() => await Global.WalletService.SendTransactionAsync(signedTransaction));
}
catch (InsufficientBalanceException ex)
{
Money needed = ex.Minimum - ex.Actual;
Logger.LogDebug <SendViewModel>(ex);
//SetWarningMessage($"Not enough coins selected. You need an estimated {needed.ToString(false, true)} BTC more to make this transaction.");
}
catch (Exception ex)
{
Logger.LogDebug <SendViewModel>(ex);
//SetWarningMessage(ex.ToTypeMessageString());
}
finally
{
IsBusy = false;
}
},
this.WhenAny(x => x.AmountText, x => x.Address, x => x.IsBusy,
(amountText, address, busy) => !string.IsNullOrWhiteSpace(amountText.Value) && !string.IsNullOrWhiteSpace(address.Value) && !busy.Value)
.ObserveOn(RxApp.MainThreadScheduler));
}
public CoinViewModel(CoinListViewModel owner, SmartCoin model, IScreen hostScreen) : base(hostScreen)
{
Model = model;
_owner = owner;
}
public SendAmountViewModel(CoinListViewModel coinList)
: base(Locator.Current.GetService <IViewStackService>())
{
Global = Locator.Current.GetService <Global>();
CoinList = coinList;
AmountText = "0.0";
AllSelectedAmount = Money.Zero;
EstimatedBtcFee = Money.Zero;
this.WhenAnyValue(x => x.AmountText)
.ObserveOn(RxApp.MainThreadScheduler)
.Subscribe(amount =>
{
// Correct amount
if (IsMax)
{
SetAmountIfMax();
}
else
{
Regex digitsOnly = new Regex(@"[^\d,.]");
string betterAmount = digitsOnly.Replace(amount, ""); // Make it digits , and . only.
betterAmount = betterAmount.Replace(',', '.');
int countBetterAmount = betterAmount.Count(x => x == '.');
if (countBetterAmount > 1) // Do not enable typing two dots.
{
var index = betterAmount.IndexOf('.', betterAmount.IndexOf('.') + 1);
if (index > 0)
{
betterAmount = betterAmount.Substring(0, index);
}
}
var dotIndex = betterAmount.IndexOf('.');
if (dotIndex != -1 && betterAmount.Length - dotIndex > 8) // Enable max 8 decimals.
{
betterAmount = betterAmount.Substring(0, dotIndex + 1 + 8);
}
if (betterAmount != amount)
{
AmountText = betterAmount;
}
}
});
_sendFromText = this
.WhenAnyValue(x => x.CoinList.SelectPrivateSwitchState, x => x.CoinList.SelectedCount)
.Select(tup =>
{
var coinGrammaticalNumber = tup.Item2 == 1 ? " Coin ▾" : " Coins ▾";
return(tup.Item1 ? "Auto-Select Private ▾" : (tup.Item2.ToString() + coinGrammaticalNumber));
})
.ToProperty(this, nameof(SendFromText));
this.WhenAnyValue(x => x.IsMax)
.ObserveOn(RxApp.MainThreadScheduler)
.Subscribe(isMax =>
{
if (isMax)
{
SetAmountIfMax();
}
});
Observable.FromEventPattern(CoinList, nameof(CoinList.SelectionChanged))
.ObserveOn(RxApp.MainThreadScheduler)
.Subscribe(_ => SetFees());
_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;
FeeRate = new FeeRate((decimal)50); //50 sat/vByte placeholder til loads
SetFees();
Observable
.FromEventPattern <AllFeeEstimate>(Global.FeeProviders, nameof(Global.FeeProviders.AllFeeEstimateChanged))
.ObserveOn(RxApp.MainThreadScheduler)
.Subscribe(_ =>
{
SetFeeTargetLimits();
if (FeeTarget < MinimumFeeTarget) // Should never happen.
{
FeeTarget = MinimumFeeTarget;
}
else if (FeeTarget > MaximumFeeTarget)
{
FeeTarget = MaximumFeeTarget;
}
SetFees();
})
.DisposeWith(Disposables);
GoNext = ReactiveCommand.CreateFromObservable(() =>
{
ViewStackService.PushPage(new SendWhoViewModel(this)).Subscribe();
return(Observable.Return(Unit.Default));
}, this.WhenAnyValue(
x => x.AmountText,
x => x.CoinList.SelectedAmount,
(amountToSpend, selectedAmount) =>
{
return(AmountTextPositive(amountToSpend) &&
Money.Parse(amountToSpend.TrimStart('~', ' ')) + EstimatedBtcFee <= selectedAmount);
}));
SelectCoins = ReactiveCommand.CreateFromObservable(() =>
{
ViewStackService.PushModal(CoinList).Subscribe();
return(Observable.Return(Unit.Default));
});
SelectFee = ReactiveCommand.CreateFromObservable(() =>
{
ViewStackService.PushModal(new FeeViewModel(this)).Subscribe();
return(Observable.Return(Unit.Default));
});
this.WhenAnyValue(x => x.FeeTarget)
.ObserveOn(RxApp.MainThreadScheduler)
.Subscribe(_ =>
{
SetFees();
});
}
public CoinJoinViewModel(CoinListViewModel coinList)
: base(Locator.Current.GetService <IViewStackService>())
{
Global = Locator.Current.GetService <Global>();
SetBalance();
notificationManager = Global.NotificationManager;
if (Disposables != null)
{
throw new Exception("Wallet opened before it was closed.");
}
Disposables = new CompositeDisposable();
CoinList = coinList;
Observable
.FromEventPattern <SmartCoin>(CoinList, nameof(CoinList.DequeueCoinsPressed))
.Subscribe(async x => await DoDequeueAsync(x.EventArgs));
this.WhenAnyValue(x => x.RoundTimesout)
.ObserveOn(RxApp.MainThreadScheduler)
.Subscribe(_ =>
{
TimeSpan left = RoundTimesout - DateTimeOffset.UtcNow;
TimeLeftTillRoundTimeout = left > TimeSpan.Zero ? left : TimeSpan.Zero; // Make sure cannot be less than zero.
});
AmountQueued = Money.Zero;
var registrableRound = Global.Wallet.ChaumianClient.State.GetRegistrableRoundOrDefault();
CoordinatorFeePercent = registrableRound?.State?.CoordinatorFeePercent.ToString() ?? "0.003";
Observable.FromEventPattern(Global.Wallet.ChaumianClient, nameof(Global.Wallet.ChaumianClient.CoinQueued))
.Merge(Observable.FromEventPattern(Global.Wallet.ChaumianClient, nameof(Global.Wallet.ChaumianClient.OnDequeue)))
.Merge(Observable.FromEventPattern(Global.Wallet.ChaumianClient, nameof(Global.Wallet.ChaumianClient.StateUpdated)))
.ObserveOn(RxApp.MainThreadScheduler)
.Subscribe(_ => UpdateStates())
.DisposeWith(Disposables);
Observable.FromEventPattern(Global.Wallet.ChaumianClient, nameof(Global.Wallet.ChaumianClient.OnDequeue))
.Subscribe(pattern =>
{
var e = (DequeueResult)pattern.EventArgs;
try
{
foreach (var success in e.Successful.Where(x => x.Value.Any()))
{
DequeueReason reason = success.Key;
if (reason == DequeueReason.UserRequested)
{
notificationManager.RemoveAllPendingNotifications();
}
}
}
catch (Exception ex)
{
Logger.LogWarning(ex);
}
})
.DisposeWith(Disposables);
ClientRound mostAdvancedRound = Global.Wallet.ChaumianClient?.State?.GetMostAdvancedRoundOrDefault();
if (mostAdvancedRound != default)
{
RoundPhaseState = new RoundPhaseState(mostAdvancedRound.State.Phase, Global.Wallet.ChaumianClient?.State.IsInErrorState ?? false);
RoundTimesout = mostAdvancedRound.State.Phase == RoundPhase.InputRegistration ? mostAdvancedRound.State.InputRegistrationTimesout : DateTimeOffset.UtcNow;
PeersRegistered = mostAdvancedRound.State.RegisteredPeerCount;
PeersNeeded = mostAdvancedRound.State.RequiredPeerCount;
}
else
{
RoundPhaseState = new RoundPhaseState(RoundPhase.InputRegistration, false);
RoundTimesout = DateTimeOffset.UtcNow;
PeersRegistered = 0;
PeersNeeded = 100;
}
Observable.Interval(TimeSpan.FromSeconds(1))
.ObserveOn(RxApp.MainThreadScheduler)
.Subscribe(_ =>
{
TimeSpan left = RoundTimesout - DateTimeOffset.UtcNow;
TimeLeftTillRoundTimeout = left > TimeSpan.Zero ? left : TimeSpan.Zero; // Make sure cannot be less than zero.
}).DisposeWith(Disposables);
CoinJoinCommand = ReactiveCommand.CreateFromTask <string, bool>(DoEnqueueAsync);
ExitCoinJoinCommand = ReactiveCommand.CreateFromTask(ExitCoinJoinAsync);
var canPromptPassword = this.WhenAnyValue(
x => x.CoinList.SelectedAmount,
x => x.RequiredBTC,
(amnt, rBTC) =>
{
return(!(rBTC is null) && !(amnt is null) && amnt >= rBTC);
});
