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diff --git a/src/interface/node.h b/src/interface/node.h
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+++ b/src/interface/node.h
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+// Copyright (c) 2018 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_INTERFACE_NODE_H
+#define BITCOIN_INTERFACE_NODE_H
+
+#include <functional>
+#include <memory>
+#include <string>
+
+namespace interface {
+
+class Handler;
+
+//! Top-level interface for a bitcoin node (bitcoind process).
+class Node
+{
+public:
+    virtual ~Node() {}
+
+    //! Set command line arguments.
+    virtual void parseParameters(int argc, const char* const argv[]) = 0;
+
+    //! Load settings from configuration file.
+    virtual void readConfigFile(const std::string& conf_path) = 0;
+
+    //! Choose network parameters.
+    virtual void selectParams(const std::string& network) = 0;
+
+    //! Init logging.
+    virtual void initLogging() = 0;
+
+    //! Init parameter interaction.
+    virtual void initParameterInteraction() = 0;
+
+    //! Get warnings.
+    virtual std::string getWarnings(const std::string& type) = 0;
+
+    //! Initialize app dependencies.
+    virtual bool baseInitialize() = 0;
+
+    //! Start node.
+    virtual bool appInitMain() = 0;
+
+    //! Stop node.
+    virtual void appShutdown() = 0;
+
+    //! Start shutdown.
+    virtual void startShutdown() = 0;
+
+    //! Register handler for init messages.
+    using InitMessageFn = std::function<void(const std::string& message)>;
+    virtual std::unique_ptr<Handler> handleInitMessage(InitMessageFn fn) = 0;
+};
+
+//! Return implementation of Node interface.
+std::unique_ptr<Node> MakeNode();
+
+} // namespace interface
+
+#endif // BITCOIN_INTERFACE_NODE_H