Add API for getting address from secret.

libqethereum/QEthereum.cpp

@@ -208,6 +208,11 @@ QString padded(QString const& _s, unsigned _l, unsigned _r)
 
 //"0xff".bin().unbin()
 
+QString QEthereum::secretToAddress(QString _s) const
+{
+	return toQJS(KeyPair(toSecret(_s)).address());
+}
+
 QString padded(QString const& _s, unsigned _l)
 {
 	if (_s.startsWith("0x") || !_s.contains(QRegExp("[^0-9]")))

libqethereum/QEthereum.h

@@ -366,6 +366,8 @@ public:
 	Q_INVOKABLE QString ethTest() const { return "Hello world!"; }
 	Q_INVOKABLE QEthereum* self() { return this; }
 
+	Q_INVOKABLE QString secretToAddress(QString _s) const;
+
 	Q_INVOKABLE QString pad(QString _s, unsigned _l) const { return padded(_s, _l); }
 	Q_INVOKABLE QString pad(QString _s, unsigned _l, unsigned _r) const { return padded(_s, _l, _r); }
 	Q_INVOKABLE QString unpad(QString _s) const { return unpadded(_s); }