diff --git a/subprojects/nemora-postd/src/nemora.hpp b/subprojects/nemora-postd/src/nemora.hpp
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+++ b/subprojects/nemora-postd/src/nemora.hpp
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+// Copyright 2021 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+#include "host_manager.hpp"
+#include "socket_manager.hpp"
+
+#include <cstdint>
+#include <mutex>
+#include <string>
+#include <thread>
+
+class Nemora
+{
+  public:
+    /**
+     * Constructs a Nemora object.
+     * - iface_name: The networking interface to use (eg. eth0)
+     * - ipv4: Target IPv4 address for UDP communication, i.e., POST streaming.
+     * - ipv6: Target IPv6 address for UDP communication, i.e., POST streaming.
+     */
+    Nemora(const std::string& iface_name, const in_addr ipv4,
+           const in6_addr ipv6);
+
+    /**
+     * Construct uninitialized Nemora object
+     */
+    Nemora();
+
+    /**
+     * Cancels polling threads and destructs Nemora object.
+     */
+    ~Nemora() = default;
+
+    /**
+     * Loops collecting the current state of event_data_ and sending via UDP.
+     */
+    void UdpPoll();
+
+  private:
+    /**
+     * Initialize event_data_ with default values.
+     * This is used by constructors.
+     */
+    void InitEventData();
+
+    /**
+     * Fetches MAC from host
+     * - mac: out-parameter for host mac address
+     * - iface_path: DBus path to network interface, typically
+     *   IFACE_ROOT + iface_path_.
+     *
+     * - returns: true if address was populated correctly, false if error
+     */
+    bool GetMacAddr(MacAddr* mac, const std::string& iface_path);
+
+    /**
+     * Converts from string to struct
+     * - mac_addr: string of format MAC_FORMAT
+     * - mac: out-parameter with MAC from mac_addr populated. must be allocated
+     * by caller
+     *
+     * - returns: true if mac_addr was correct format, false otherwise
+     */
+    bool ParseMac(const std::string& mac_addr, MacAddr* mac);
+
+    /**
+     * Update event_data_ from host.
+     * - postcodes: list of postcodes polled.
+     *   Forced to bind to temporary to avoid copying.
+     */
+    void UpdateEventData(std::vector<uint64_t>&& postcodes);
+
+    NemoraEvent event_data_ = {};
+    std::mutex event_data_mutex_;
+
+    SocketManager socketManager_;
+    HostManager hostManager_;
+    const std::string iface_path_;
+};