Round out node private key functionality.

src/NewcoinAddress.cpp

@@ -141,6 +141,20 @@ void NewcoinAddress::setNodePublic(const std::vector<unsigned char>& vPublic)
 // NodePrivate
 //
 
+const std::vector<unsigned char>& NewcoinAddress::getNodePrivateData() const
+{
+    switch (nVersion) {
+    case VER_NONE:
+		throw std::runtime_error("unset source");
+
+    case VER_NODE_PRIVATE:
+		return vchData;
+
+    default:
+		throw std::runtime_error(str(boost::format("bad source: %d") % int(nVersion)));
+    }
+}
+
 uint256 NewcoinAddress::getNodePrivate() const
 {
     switch (nVersion) {

src/NewcoinAddress.h

@@ -54,6 +54,7 @@ public:
 	//
 	// Node Private
 	//
+	const std::vector<unsigned char>& getNodePrivateData() const;
 	uint256 getNodePrivate() const;
 
 	std::string humanNodePrivate() const;

src/Wallet.h

@@ -51,6 +51,7 @@ public:
 	void start();
 
 	NewcoinAddress& getNodePublic() { return mNodePublicKey; }
+	NewcoinAddress& getNodePrivate() { return mNodePrivateKey; }
 
 	NewcoinAddress addFamily(const std::string& passPhrase, bool lock);
 	NewcoinAddress addFamily(const NewcoinAddress& familySeed, bool lock);