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diff --git a/hicn-light/src/content_store/contentStoreEntry.h b/hicn-light/src/content_store/contentStoreEntry.h
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+/*
+ * Copyright (c) 2017-2019 Cisco and/or its affiliates.
+ * 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.
+ */
+
+#ifndef contentStoreEntry_h
+#define contentStoreEntry_h
+
+#include <src/content_store/listLRU.h>
+#include <src/core/message.h>
+
+struct contentstore_entry;
+typedef struct contentstore_entry ContentStoreEntry;
+
+/**
+ * The max time allowed for an ExpiryTime. Will never be exceeded.
+ */
+extern const uint64_t contentStoreEntry_MaxExpiryTime;
+
+/**
+ * Creates a new `ContentStoreEntry` instance, acquiring a reference to the
+ * supplied `Message`.
+ *
+ * @param message the message to store
+ * @param listLRU the LRU list that this entry will be stored in.
+ * @return A newly created `ContentStoreEntry` instance that must eventually be
+ * released by calling
+ *         {@link contentStoreEntry_Release}.
+ *
+ * @see contentStoreEntry_Release
+ */
+ContentStoreEntry *contentStoreEntry_Create(Message *objectMessage,
+                                            ListLru *listLRU);
+
+/**
+ * Returns a reference counted copy of the supplied `ContentStoreEntry`.
+ *
+ * @param original the ContentStoreEntry to return a reference to.
+ * @return Reference counted copy, must call
+ * <code>contentStoreEntry_Destroy()</code> on it.
+ */
+ContentStoreEntry *contentStoreEntry_Acquire(const ContentStoreEntry *original);
+
+/**
+ * Releases one reference count and destroys object when reaches zero
+ *
+ * @param [in,out] entryPtr A pointer to an allocated ContentStoreEntry
+ *
+ */
+void contentStoreEntry_Release(ContentStoreEntry **entryPtr);
+
+/**
+ * Returns a pointer to the contained {@link Message}.
+ * The caller must called {@link message_Acquire()} if they want to keep a
+ * reference to the returned message.
+ *
+ * @param storeEntry the ContentStoreEntry from which to retrieve the `Message`
+ * pointer.
+ * @return the address of the `Message` contained in the storeEntry.
+ * @see message_Acquire
+ */
+Message *contentStoreEntry_GetMessage(const ContentStoreEntry *storeEntry);
+
+/**
+ * Return true if the message stored in this `ContentStoreEntry` has an
+ * ExpiryTime.
+ *
+ * @param storeEntry the ContentStoreEntry containing the message.
+ * @return true if the referenced message has an ExpiryTime. False, otherwise.
+ */
+bool contentStoreEntry_HasExpiryTimeTicks(const ContentStoreEntry *storeEntry);
+
+/**
+ * Return the ExpiryTime stored in this `ContentStoreEntry`.
+ *
+ * @param storeEntry the ContentStoreEntry from which to retrieve the `Message`
+ * pointer.
+ * @return the address of the `Message` contained in the storeEntry.
+ */
+uint64_t contentStoreEntry_GetExpiryTimeTicks(
+    const ContentStoreEntry *storeEntry);
+
+/**
+ * A signum function comparing two `ContentStoreEntry` instances, using their
+ * ExpiryTime and, if necessary, the addresses of the referenced Message. In
+ * other words, if two ContentStoreEntries have the same ExpiryTime, the
+ * comparison will then be made on the memory addresses of the Messages
+ * referenced by the ContentStoreEntrys. So, the only way two ContentStoreEntrys
+ * will compare equally (0) is if they both have the same ExpiryTime and
+ * reference the same Message.
+ *
+ * Used to determine the ordering relationship of two `ContentStoreEntry`
+ * instances. This is used by the {@link ListTimeOrdered} to keep a list of
+ * ContentStoreEntrys, sorted by ExpiryTime.
+ *
+ * @param [in] storeEntry1 A pointer to a `ContentStoreEntry` instance.
+ * @param [in] storeEntry2 A pointer to a `ContentStoreEntry` instance to be
+ * compared to `storeEntry1`.
+ *
+ * @return 0 if `storeEntry1` and `storeEntry2` are equivalent
+ * @return < 0 if `storeEntry1` < `storeEntry2`
+ * @return > 0 if `storeEntry1` > `storeEntry2`
+ *
+ * Example:
+ * @code
+ * {
+ *     ContentStoreEntry *entry1 = contentStoreEntry_Create(...);
+ *     ContentStoreEntry *entry2 = contentStoreEntry_Create(...);
+ *
+ *     int val = contentStoreEntry_CompareExpiryTime(entry1, entry2);
+ *     if (val < 0) {
+ *         // entry1 has a lower ExpiryTime, or the same ExpiryTime as entry2
+ * and a different message. } else if (val > 0) {
+ *         // entry2 has a lower ExpiryTime, or the same ExpiryTime as entry1
+ * and a different message. } else {
+ *         // entry1 and entry2 have the same ExpiryTime AND the same message.
+ *     }
+ *
+ *     contentStoreEntry_Release(&entry1);
+ *     contentStoreEntry_Release(&entry2);
+ *
+ * }
+ * @endcode
+ */
+int contentStoreEntry_CompareExpiryTime(const ContentStoreEntry *storeEntry1,
+                                        const ContentStoreEntry *storeEntry2);
+
+/**
+ * Move this entry to the head of the LRU list
+ *
+ * Moves the entry to the head of the LRU list it was created with
+ *
+ * @param [in] storeEntry An allocated ContenstoreEntry
+ */
+void contentStoreEntry_MoveToHead(ContentStoreEntry *storeEntry);
+#endif  // contentStoreEntry_h