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diff --git a/src/access_api_handler.h b/src/access_api_handler.h
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+++ b/src/access_api_handler.h
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+// Copyright 2016 The Weave Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef LIBWEAVE_SRC_ACCESS_API_HANDLER_H_
+#define LIBWEAVE_SRC_ACCESS_API_HANDLER_H_
+
+#include <memory>
+
+#include <base/memory/weak_ptr.h>
+#include <weave/error.h>
+
+namespace weave {
+
+class AccessBlackListManager;
+class Command;
+class Device;
+
+// Handles commands for 'accessControlBlackList' trait.
+// Objects of the class subscribe for notification from CommandManager and
+// execute incoming commands.
+// Handled commands:
+//  accessControlBlackList.block
+//  accessControlBlackList.unblock
+//  accessControlBlackList.list
+class AccessApiHandler final {
+ public:
+  AccessApiHandler(Device* device, AccessBlackListManager* manager);
+
+ private:
+  void Block(const std::weak_ptr<Command>& command);
+  void Unblock(const std::weak_ptr<Command>& command);
+  void List(const std::weak_ptr<Command>& command);
+  void UpdateState();
+
+  void OnCommandDone(const std::weak_ptr<Command>& command, ErrorPtr error);
+
+  Device* device_{nullptr};
+  AccessBlackListManager* manager_{nullptr};
+
+  base::WeakPtrFactory<AccessApiHandler> weak_ptr_factory_{this};
+  DISALLOW_COPY_AND_ASSIGN(AccessApiHandler);
+};
+
+}  // namespace weave
+
+#endif  // LIBWEAVE_SRC_ACCESS_API_HANDLER_H_