Split and refactor ProofOfWork

src/cpp/ripple/ripple_ProofOfWork.h

@@ -0,0 +1,48 @@
+#ifndef RIPPLE_PROOFOFWORK_H
+#define RIPPLE_PROOFOFWORK_H
+
+class ProofOfWork
+{
+public:
+	static const int sMaxDifficulty;
+
+	typedef boost::shared_ptr <ProofOfWork> pointer;
+
+	ProofOfWork (const std::string& token,
+                 int iterations,
+                 const uint256& challenge,
+                 const uint256& target);
+
+	explicit ProofOfWork (const std::string& token);
+
+	bool isValid() const;
+
+	uint256 solve(int maxIterations = 2 * sMaxIterations) const;
+	bool checkSolution(const uint256& solution) const;
+
+	const std::string& getToken() const		{ return mToken; }
+	const uint256& getChallenge() const		{ return mChallenge; }
+
+    uint64 getDifficulty() const
+    {
+        return getDifficulty(mTarget, mIterations);
+    }
+
+	// approximate number of hashes needed to solve
+	static uint64 getDifficulty (const uint256& target, int iterations);
+
+    static bool validateToken (const std::string& strToken);
+
+private:
+	std::string		mToken;
+	uint256			mChallenge;
+	uint256			mTarget;
+	int				mIterations;
+
+	static const uint256 sMinTarget;
+	static const int sMaxIterations;
+};
+
+#endif
+
+// vim:ts=4