wallet api: added getTxKey()

src/libwalletqt/Wallet.cpp

@@ -270,6 +270,11 @@ QString Wallet::getUserNote(const QString &txid) const
   return QString::fromStdString(m_walletImpl->getUserNote(txid.toStdString()));
 }
 
+QString Wallet::getTxKey(const QString &txid) const
+{
+  return QString::fromStdString(m_walletImpl->getTxKey(txid.toStdString()));
+}
+
 Wallet::Wallet(Bitmonero::Wallet *w, QObject *parent)
     : QObject(parent)
     , m_walletImpl(w)

src/libwalletqt/Wallet.h

@@ -141,6 +141,8 @@ public:
     Q_INVOKABLE bool setUserNote(const QString &txid, const QString &note);
     Q_INVOKABLE QString getUserNote(const QString &txid) const;
 
+    Q_INVOKABLE QString getTxKey(const QString &txid) const;
+
     // TODO: setListenter() when it implemented in API
 signals:
     // emitted on every event happened with wallet