Improvements in JSON RPC

include/INode.h

@@ -0,0 +1,37 @@
+// Copyright (c) 2012-2013 The Cryptonote developers
+// Distributed under the MIT/X11 software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#pragma once
+
+#include <cstdint>
+#include <system_error>
+
+namespace cryptonote {
+
+class INodeObserver {
+public:
+  virtual void initCompleted(std::error_code result) {}
+
+  virtual void peerCountUpdated(size_t count) {}
+  virtual void lastLocalBlockHeightUpdated(uint64_t height) {}
+  virtual void lastKnownBlockHeightUpdated(uint64_t height) {}
+
+  virtual void blockchainReorganized(uint64_t height) {}
+};
+
+class INode {
+public:
+  virtual ~INode() = 0;
+  virtual void init() = 0;
+  virtual void shutdown() = 0;
+
+  virtual void addObserver(INodeObserver* observer) = 0;
+  virtual void removeObserver(INodeObserver* observer) = 0;
+
+  virtual size_t getPeerCount() = 0;
+  virtual uint64_t getLastLocalBlockHeight() = 0;
+  virtual uint64_t getLastKnownBlockHeight() = 0;
+};
+
+}