1 files changed, 42 insertions, 0 deletions
diff --git a/src/main/java/org/whispersystems/libaxolotl/state/PreKeyStore.java b/src/main/java/org/whispersystems/libaxolotl/state/PreKeyStore.java
new file mode 100644
index 00000000..7dc5e626
--- /dev/null
+++ b/src/main/java/org/whispersystems/libaxolotl/state/PreKeyStore.java
@@ -0,0 +1,42 @@
+package org.whispersystems.libaxolotl.state;
+
+import org.whispersystems.libaxolotl.InvalidKeyIdException;
+
+/**
+ * An interface describing the local storage of {@link PreKeyRecord}s.
+ *
+ * @author Moxie Marlinspike
+ */
+public interface PreKeyStore {
+
+  /**
+   * Load a local PreKeyRecord.
+   *
+   * @param preKeyId the ID of the local PreKeyRecord.
+   * @return the corresponding PreKeyRecord.
+   * @throws InvalidKeyIdException when there is no corresponding PreKeyRecord.
+   */
+  public PreKeyRecord loadPreKey(int preKeyId) throws InvalidKeyIdException;
+
+  /**
+   * Store a local PreKeyRecord.
+   *
+   * @param preKeyId the ID of the PreKeyRecord to store.
+   * @param record the PreKeyRecord.
+   */
+  public void         storePreKey(int preKeyId, PreKeyRecord record);
+
+  /**
+   * @param preKeyId A PreKeyRecord ID.
+   * @return true if the store has a record for the preKeyId, otherwise false.
+   */
+  public boolean      containsPreKey(int preKeyId);
+
+  /**
+   * Delete a PreKeyRecord from local storage.
+   *
+   * @param preKeyId The ID of the PreKeyRecord to remove.
+   */
+  public void         removePreKey(int preKeyId);
+
+}