/// <summary>
/// Handle a fatal exception by calling our logger and then informing the user if possible.
/// </summary>
/// <param name="ex">
/// The exception that triggered this.
/// </param>
private static void HandleFatalException(Exception ex)
{
try
{
Logger.ApplicationInstance.Error("Fatal error within Sift.", ex);
}
catch
{
// Intentionally swallowed
}
string msg = "There was a fatal error within SIFT, please contact support with this message." + Environment.NewLine + ex;
try
{
SiftDialog.ShowDialog("Fatal Error", msg);
}
catch
{
try
{
MessageBox.Show(msg);
}
catch
{
// Intentionally swallowed
}
}
}
/// <summary>
/// Shows a SIFT dialog without any buttons in non-modal mode.
/// </summary>
/// <param name="title">
/// The title of the message.
/// </param>
/// <param name="message">
/// The message to show.
/// </param>
/// <param name="isEthereum">
/// If this dialog is related to the ethereum network (true) and as such the ethereum logo should be displayed, otherwise false.
/// </param>
/// <returns>
/// The dialog that was shown.
/// </returns>
public static SiftDialog ShowButtonless(string title, string message, bool isEthereum = false)
{
Func <SiftDialog> uiCallback = () =>
{
SiftDialogViewModel viewModel = new SiftDialogViewModel
{
Title = title,
Message = message,
IsEthereumAnimatedLogoVisible = isEthereum,
IsSiftLogoVisible = !isEthereum,
IsLogButtonVisible = true,
IsNoButtonVisible = false,
IsReturnButtonVisible = false,
IsYesButtonVisible = false
};
SiftDialog dialog = new SiftDialog
{
DataContext = viewModel,
Owner = Application.Current.MainWindow
};
viewModel.CloseRequested += (s, e) => dialog.Close();
dialog.Show();
return(dialog);
};
if (Application.Current.Dispatcher.CheckAccess())
{
return(uiCallback());
}
else
{
return(Application.Current.Dispatcher.Invoke(uiCallback));
}
}
/// <summary>
/// Perform an investment in SIFT using the current UI settings.
/// </summary>
private async Task Invest()
{
// Disable UI
SiftInvestIsEnabled = false;
// Check times
if (DateTime.UtcNow < _ethereumManager.IcoStartDate)
{
SiftDialog.ShowDialog("ICO Not Open", "The ICO for SIFT does not open until " + _ethereumManager.IcoStartDate.ToShortDateString() + " (00:00 GMT). Please wait until this time to invest in SIFT.");
return;
}
else if (DateTime.UtcNow > _ethereumManager.IcoEndDate)
{
SiftDialog.ShowDialog("ICO Not Open", "The ICO for SIFT finished at " + _ethereumManager.IcoStartDate.ToShortDateString() + " (00:00 GMT). As soon as the ICO has been closed you will be able to purchase SIFT via an open marketplace.");
return;
}
// Perform the purchase
SiftPurchaseResponse response = await _ethereumManager.PurchaseSift(SelectedAccount.Address, SiftAmountToPurchase);
if (!response.WasSuccessful)
{
SiftDialog.ShowDialog("SIFT Investment Problem", "Sorry, there was a problem processing your transaction. Your SIFT could not be purchased at this time." + Environment.NewLine + Environment.NewLine + response.FailureReason);
}
else
{
TransactionToMine = _ethereumManager.EnqueueTransactionPendingReceipt(response.TransactionHash);
if (TransactionToMine == null)
{
SiftDialog.ShowDialog("SIFT Delayed Investment", "Your transaction to buy SIFT was successfully sent with hash " + response.TransactionHash + ", but we could not validate the transaction. Your balance should update shortly, but if not please retry the transaction after checking your Ethereum wallet.");
}
else
{
// Hookup to wait to hear the status, or process it immediately if we have it
Action act = () =>
{
TransactionToMine.PropertyChanged += OnTransactionToMinePropertyChanged;
_miningTransactionDialogViewModel = new SiftDialogViewModel
{
IsEthereumAnimatedLogoVisible = true,
IsLogButtonVisible = true,
Title = "Confirming SIFT Investment",
Message = "Your transaction to invest in SIFT has been sent to the Ethereum network. Depending on the current network congestion it may take anywhere between a few seconds and minutes for the transaction to confirm. If the transaction does not confirm within a few minutes you can check your Ethereum wallet for more information." + Environment.NewLine + Environment.NewLine + "Please wait..."
};
_miningTransactionDialog = new SiftDialog
{
DataContext = _miningTransactionDialogViewModel,
Owner = Application.Current.MainWindow
};
_miningTransactionDialogViewModel.CloseRequested += (s, e) =>
{
_miningTransactionDialog.Close();
_miningTransactionDialog = null;
_miningTransactionDialogViewModel = null;
};
_miningTransactionDialog.ShowDialog();
};
if (Application.Current.Dispatcher.CheckAccess())
{
act();
}
else
{
Application.Current.Dispatcher.Invoke(act);
}
}
}
// Update the UI
UpdateSiftPurchaseSettings();
}
/// <summary>
/// Purchase SIFT from one of our accounts.
/// </summary>
/// <param name="address">
/// The account to use for purchase.
/// </param>
/// <param name="quantity">
/// The quantity to purchase.
/// </param>
/// <returns>
/// Details of the purchase result indicating whether a success or failure happened.
/// </returns>
public async Task <SiftPurchaseResponse> PurchaseSift(string address, uint quantity)
{
try
{
// Ensure we have the balance
decimal purchaseCostWei = WeiPerSift * quantity;
EthereumAccount account = Accounts.FirstOrDefault(acc => acc.Address == address);
if (account == null)
{
return(new SiftPurchaseResponse(SiftPurchaseFailureType.UnknownAccount, "The specified account address is not known."));
}
if (account.BalanceWei < purchaseCostWei)
{
return(new SiftPurchaseResponse(SiftPurchaseFailureType.InsufficientFunds, "The specified account does not have sufficient funds."));
}
// Determine the gas cost for this
TransactionGasInfo gasInfo = await CalculateGasCostForEtherSend(address, IcoContractAddress, purchaseCostWei);
decimal gasPrice = gasInfo.GasPrice;
decimal gasCost = gasInfo.GasCost;
decimal gas = gasInfo.Gas;
decimal remainingGasMoney = account.BalanceWei - purchaseCostWei;
if (remainingGasMoney < gasCost)
{
return(new SiftPurchaseResponse(SiftPurchaseFailureType.InsufficientGas, "You do not have enough gas for this transaction."));
}
byte gasMultiple = 25;
decimal maximumGasCost;
while ((maximumGasCost = gasCost * gasMultiple) * gasPrice > remainingGasMoney)
{
gasMultiple--;
}
// Prompt to unlock account
Logger.ApplicationInstance.Debug("Asking user confirmation for sending " + purchaseCostWei + " from " + address + " to " + IcoContractAddress);
Func <TransactionUnlockViewModel> fnc = new Func <TransactionUnlockViewModel>(() =>
{
TransactionUnlockViewModel vm = new TransactionUnlockViewModel(gasCost, gasMultiple, gas, address, IcoContractAddress, purchaseCostWei);
TransactionUnlockWindow window = new TransactionUnlockWindow
{
DataContext = vm
};
window.ShowDialog();
return(vm);
});
TransactionUnlockViewModel viewModel = Application.Current.Dispatcher.Invoke(fnc);
if (viewModel.WasCancelled)
{
return(new SiftPurchaseResponse(SiftPurchaseFailureType.UserCancelled, "User cancelled transaction on confirmation screen."));
}
// Unlock the account
SiftDialog dialog = SiftDialog.ShowButtonless("Sending Transaction", "Please wait whilst the transaction to buy SIFT is sent to the Ethereum network, this should only take a few seconds...", true);
Logger.ApplicationInstance.Debug("Attempting to unlock " + address);
if (!await _web3.Personal.UnlockAccount.SendRequestAsync(address, viewModel.Password == null ? string.Empty : viewModel.Password.ToString(), 120))
{
return(new SiftPurchaseResponse(SiftPurchaseFailureType.UnlockError, "Unable to unlock account with the supplied password."));
}
// Send and mine the transaction
Logger.ApplicationInstance.Debug("Account unlocked, sending " + purchaseCostWei + " from " + address + " to " + IcoContractAddress);
TransactionInput transactionInput = new TransactionInput
{
From = address,
To = IcoContractAddress,
Value = new HexBigInteger(new BigInteger(purchaseCostWei)),
GasPrice = new HexBigInteger(new BigInteger(viewModel.SelectedGasMultiplier * gasCost)),
Gas = new HexBigInteger(new BigInteger(viewModel.Gas))
};
Logger.ApplicationInstance.Info("Sending transaction for " + purchaseCostWei + " to " + IcoContractAddress + " from " + address);
string transactionHash = await _web3.Eth.Transactions.SendTransaction.SendRequestAsync(transactionInput);
Action act = dialog.Close;
if (dialog.Dispatcher.CheckAccess())
{
act();
}
else
{
dialog.Dispatcher.Invoke(act);
}
// Return the response of the transaction hash
return(new SiftPurchaseResponse(transactionHash));
}
catch (Exception ex)
{
Logger.ApplicationInstance.Error("Error purchasing SIFT", ex);
if (ex.Message.Contains("personal_unlockAccount method not implemented"))
{
return(new SiftPurchaseResponse(SiftPurchaseFailureType.MissingRpcPersonal, "Your geth installation doesn't have the personal RPC enabled, please enable it to continue."));
}
else if (ex.Message.Contains("could not decrypt key with given passphrase"))
{
return(new SiftPurchaseResponse(SiftPurchaseFailureType.PasswordInvalid, "The password you supplied was incorrect"));
}
return(new SiftPurchaseResponse(SiftPurchaseFailureType.Unknown, ex.ToString()));
}
}
/// <summary>
/// This method is the main entry point for the ethereum checks and it is responsible for changing message content.
/// </summary>
private void ThreadEntry()
{
// Always check for updates first
StatusText = "Checking for updates to sift-win...";
StatusHeader = "Please Wait...";
try
{
// Login to update API
Logger.ApplicationInstance.Debug("Checking for updated version of SIFT");
AuthenticationClient authClient = new AuthenticationClient();
AuthenticateUserResponse authResponse = authClient.AuthenticateJwtAsync(new AuthenticateUserRequest
{
Username = "******",
Password = "******"
}).Result;
if (authResponse == null)
{
throw new Exception("Null response when checking authentication details");
}
// Call to get latest summary information
ProductClient client = new ProductClient();
ProductSummaryResponse response = client.ProductSummaryGetAsync("D7682386-897C-4798-84B3-911EDEB8BD44", "BEARER " + authResponse?.JsonWebToken).Result;
if (response == null)
{
throw new Exception("Null response when checking product details");
}
// Determine any changes to state an update UI accordingly
Logger.ApplicationInstance.Debug("Latest version is " + response.LatestVersion + " from " + response.LatestDownloadUrl);
if (!string.IsNullOrEmpty(response.LatestVersion))
{
Logger.ApplicationInstance.Info("A new version of SIFT - version " + response.LatestVersion + " is available from " + response.LatestDownloadUrl);
Version version = Version.Parse(response.LatestVersion);
if (!System.Diagnostics.Debugger.IsAttached)
{
if (Assembly.GetEntryAssembly().GetName().Version < version && SiftDialog.ShowDialog("SIFT Upgrade Available", "A new version of SIFT is available (" + version + "). Would you like to download it now?", true).Value)
{
System.Diagnostics.Process.Start(string.IsNullOrWhiteSpace(response.LatestDownloadUrl) ? "http://smartift.com/sift-win/latest" : response.LatestDownloadUrl);
}
}
}
}
catch (Exception ex)
{
Logger.ApplicationInstance.Error("Failed to check for latest version", ex);
}
finally
{
}
DateTime started = DateTime.UtcNow;
StatusText = MessageConnecting;
while (_isAlive)
{
// Break out of loop if we know what we're doing
if (_ethereumManager.ContractPhase != ContractPhase.Unknown && !_ethereumManager.IsSyncing && _ethereumManager.LastChecksSuccessful && _ethereumManager.BlockNumber > 0 && _ethereumManager.Accounts.Count > 0)
{
break;
}
// If we've just gone over 5 seconds display a "this may be broken" message and enable exit button
if (DateTime.UtcNow > started.AddSeconds(5) || _ethereumManager.LastChecksSuccessful)
{
StatusHeader = "Error!";
if (!_ethereumManager.LastChecksSuccessful || _ethereumManager.BlockNumber < 1)
{
StatusText = MessageDelayedStart;
}
else if (_ethereumManager.Accounts.Count < 1)
{
StatusText = MessageNoAddresses;
}
else if (_ethereumManager.IsSyncing)
{
StatusText = MessageSyncing;
}
else
{
StatusText = MessageUnknownContractState;
}
IsErrorState = true;
}
// Wait to retry
Thread.Sleep(100);
}
// If we're still alive show appropriate window
if (_isAlive)
{
// Show correct window and close the splash screen
Action act = () =>
{
Window mainWindow = Application.Current.MainWindow;
Window newWindow;
if (_ethereumManager.ContractPhase == ContractPhase.Ico)
{
newWindow = new IcoWindow {
DataContext = new IcoViewModel(_ethereumManager)
}
}
;
else
{
newWindow = new PostIcoWindow {
DataContext = new PostIcoViewModel(_ethereumManager)
}
};
newWindow.Show();
Application.Current.MainWindow = newWindow;
mainWindow.Close();
};
Application.Current.Dispatcher.BeginInvoke(act);
}
}