/**
* Perform the unlock (if necessary). The passphrase must be correct if the
* wallet is actually locked, and can be anything else.
* @param passphrase Passphrase to use for unlocking.
* @throws UnlockFailure if the passphrase is wrong.
*/
void
CoinInterface::WalletUnlocker::unlock (const std::string& passphrase)
{
if (unlocked)
throw std::runtime_error ("Wallet is already unlocked!");
const bool needPwd = nc.needWalletPassphrase ();
if (needPwd)
{
/* Empty password is a special case, because it is not handled correctly
by the walletpassphrase RPC call. Thus catch this case right now
and fail as if the passphrase would have been wrong. */
if (passphrase.empty ())
throw UnlockFailure ("Wallet passphrase cannot be empty.");
/* Ensure the wallet is indeed locked before we send the passphrase.
It could be the case that it is unlocked although for too short
a time, then lock it now. */
rpc.executeRpc ("walletlock");
try
{
rpc.disableLoggingOneShot ();
rpc.executeRpc ("walletpassphrase", passphrase, UNLOCK_SECONDS);
unlocked = true;
}
catch (const JsonRpc::RpcError& exc)
{
if (exc.getErrorCode () == -14)
throw UnlockFailure ("Wrong wallet passphrase.");
throw exc;
}
}
}
/**
* Try to unlock the wallet. If a passphrase is needed, a dialog is shown
* until the correct one is entered or the user cancels the action. In the
* latter case, UnlockFailure is thrown.
* @throws UnlockFailure if the user cancels the unlock.
*/
void
NMC_WalletUnlocker::unlock ()
{
std::string pwd;
qDebug () << "Trying to unlock the Namecoin wallet.";
/* If we need a password, show the dialog. */
if (nc.needWalletPassphrase ())
{
OTPassword otPwd;
MTDlgPassword dlg (nullptr, otPwd);
dlg.setDisplay ("Your Namecoin wallet is locked. For the operations to"
" proceed, please enter the passphrase to temporarily"
" unlock the wallet.");
const int res = dlg.exec ();
/* Return code is 0 for cancel button or closing the window.
It is 1 in case of ok. */
if (res == 0)
{
qDebug () << "Wallet unlock was cancelled.";
throw UnlockFailure("Wallet unlock was cancelled.");
}
dlg.extractPassword ();
pwd = otPwd.getPassword ();
}
/* Now try to unlock. If the passphrase is wrong, retry by a tail-recursive
call to unlock(). */
try
{
unlocker.unlock (pwd);
qDebug () << "Unlock successful (or not necessary).";
}
catch (const nmcrpc::NamecoinInterface::UnlockFailure& exc)
{
qDebug () << "Wrong passphrase, retrying.";
unlock ();
}
catch (const nmcrpc::JsonRpc::RpcError& exc)
{
qDebug () << "NMC RPC Error " << exc.getErrorCode ()
<< ": " << exc.getErrorMessage ().c_str ();
}
catch (const std::exception& exc)
{
qDebug () << "Error: " << exc.what ();
}
}