Break out into separate repo.

11 files changed, 12833 insertions, 0 deletions

diff --git a/src/main/java/org/whispersystems/libaxolotl/state/AxolotlStore.java b/src/main/java/org/whispersystems/libaxolotl/state/AxolotlStore.java
new file mode 100644
index 00000000..2fda9a21
--- /dev/null
+++ b/src/main/java/org/whispersystems/libaxolotl/state/AxolotlStore.java
@@ -0,0 +1,6 @@
+package org.whispersystems.libaxolotl.state;
+
+public interface AxolotlStore
+    extends IdentityKeyStore, PreKeyStore, SessionStore, SignedPreKeyStore
+{
+}
diff --git a/src/main/java/org/whispersystems/libaxolotl/state/IdentityKeyStore.java b/src/main/java/org/whispersystems/libaxolotl/state/IdentityKeyStore.java
new file mode 100644
index 00000000..d2024f78
--- /dev/null
+++ b/src/main/java/org/whispersystems/libaxolotl/state/IdentityKeyStore.java
@@ -0,0 +1,57 @@
+package org.whispersystems.libaxolotl.state;
+
+import org.whispersystems.libaxolotl.IdentityKey;
+import org.whispersystems.libaxolotl.IdentityKeyPair;
+
+/**
+ * Provides an interface to identity information.
+ *
+ * @author Moxie Marlinspike
+ */
+public interface IdentityKeyStore {
+
+  /**
+   * Get the local client's identity key pair.
+   *
+   * @return The local client's persistent identity key pair.
+   */
+  public IdentityKeyPair getIdentityKeyPair();
+
+  /**
+   * Return the local client's registration ID.
+   * <p>
+   * Clients should maintain a registration ID, a random number
+   * between 1 and 16380 that's generated once at install time.
+   *
+   * @return the local client's registration ID.
+   */
+  public int             getLocalRegistrationId();
+
+  /**
+   * Save a remote client's identity key
+   * <p>
+   * Store a remote client's identity key as trusted.
+   *
+   * @param recipientId The recipient ID of the remote client.
+   * @param identityKey The remote client's identity key.
+   */
+  public void            saveIdentity(long recipientId, IdentityKey identityKey);
+
+
+  /**
+   * Verify a remote client's identity key.
+   * <p>
+   * Determine whether a remote client's identity is trusted.  Convention is
+   * that the TextSecure protocol is 'trust on first use.'  This means that
+   * an identity key is considered 'trusted' if there is no entry for the recipient
+   * in the local store, or if it matches the saved key for a recipient in the local
+   * store.  Only if it mismatches an entry in the local store is it considered
+   * 'untrusted.'
+   *
+   * @param recipientId The recipient ID of the remote client.
+   * @param identityKey The identity key to verify.
+   * @return true if trusted, false if untrusted.
+   */
+  public boolean         isTrustedIdentity(long recipientId, IdentityKey identityKey);
+
+}
diff --git a/src/main/java/org/whispersystems/libaxolotl/state/PreKeyBundle.java b/src/main/java/org/whispersystems/libaxolotl/state/PreKeyBundle.java
new file mode 100644
index 00000000..772bcc14
--- /dev/null
+++ b/src/main/java/org/whispersystems/libaxolotl/state/PreKeyBundle.java
@@ -0,0 +1,96 @@
+package org.whispersystems.libaxolotl.state;
+
+import org.whispersystems.libaxolotl.IdentityKey;
+import org.whispersystems.libaxolotl.ecc.ECPublicKey;
+
+/**
+ * A class that contains a remote PreKey and collection
+ * of associated items.
+ *
+ * @author Moxie Marlinspike
+ */
+public class PreKeyBundle {
+
+  private int         registrationId;
+
+  private int         deviceId;
+
+  private int         preKeyId;
+  private ECPublicKey preKeyPublic;
+
+  private int         signedPreKeyId;
+  private ECPublicKey signedPreKeyPublic;
+  private byte[]      signedPreKeySignature;
+
+  private IdentityKey identityKey;
+
+  public PreKeyBundle(int registrationId, int deviceId, int preKeyId, ECPublicKey preKeyPublic,
+                      int signedPreKeyId, ECPublicKey signedPreKeyPublic, byte[] signedPreKeySignature,
+                      IdentityKey identityKey)
+  {
+    this.registrationId        = registrationId;
+    this.deviceId              = deviceId;
+    this.preKeyId              = preKeyId;
+    this.preKeyPublic          = preKeyPublic;
+    this.signedPreKeyId        = signedPreKeyId;
+    this.signedPreKeyPublic    = signedPreKeyPublic;
+    this.signedPreKeySignature = signedPreKeySignature;
+    this.identityKey           = identityKey;
+  }
+
+  /**
+   * @return the device ID this PreKey belongs to.
+   */
+  public int getDeviceId() {
+    return deviceId;
+  }
+
+  /**
+   * @return the unique key ID for this PreKey.
+   */
+  public int getPreKeyId() {
+    return preKeyId;
+  }
+
+  /**
+   * @return the public key for this PreKey.
+   */
+  public ECPublicKey getPreKey() {
+    return preKeyPublic;
+  }
+
+  /**
+   * @return the unique key ID for this signed prekey.
+   */
+  public int getSignedPreKeyId() {
+    return signedPreKeyId;
+  }
+
+  /**
+   * @return the signed prekey for this PreKeyBundle.
+   */
+  public ECPublicKey getSignedPreKey() {
+    return signedPreKeyPublic;
+  }
+
+  /**
+   * @return the signature over the signed  prekey.
+   */
+  public byte[] getSignedPreKeySignature() {
+    return signedPreKeySignature;
+  }
+
+  /**
+   * @return the {@link org.whispersystems.libaxolotl.IdentityKey} of this PreKeys owner.
+   */
+  public IdentityKey getIdentityKey() {
+    return identityKey;
+  }
+
+  /**
+   * @return the registration ID associated with this PreKey.
+   */
+  public int getRegistrationId() {
+    return registrationId;
+  }
+}
diff --git a/src/main/java/org/whispersystems/libaxolotl/state/PreKeyRecord.java b/src/main/java/org/whispersystems/libaxolotl/state/PreKeyRecord.java
new file mode 100644
index 00000000..0ea905f4
--- /dev/null
+++ b/src/main/java/org/whispersystems/libaxolotl/state/PreKeyRecord.java
@@ -0,0 +1,51 @@
+package org.whispersystems.libaxolotl.state;
+
+import com.google.protobuf.ByteString;
+
+import org.whispersystems.libaxolotl.InvalidKeyException;
+import org.whispersystems.libaxolotl.ecc.Curve;
+import org.whispersystems.libaxolotl.ecc.ECKeyPair;
+import org.whispersystems.libaxolotl.ecc.ECPrivateKey;
+import org.whispersystems.libaxolotl.ecc.ECPublicKey;
+
+import java.io.IOException;
+
+import static org.whispersystems.libaxolotl.state.StorageProtos.PreKeyRecordStructure;
+
+public class PreKeyRecord {
+
+  private PreKeyRecordStructure structure;
+
+  public PreKeyRecord(int id, ECKeyPair keyPair) {
+    this.structure = PreKeyRecordStructure.newBuilder()
+                                          .setId(id)
+                                          .setPublicKey(ByteString.copyFrom(keyPair.getPublicKey()
+                                                                                   .serialize()))
+                                          .setPrivateKey(ByteString.copyFrom(keyPair.getPrivateKey()
+                                                                                    .serialize()))
+                                          .build();
+  }
+
+  public PreKeyRecord(byte[] serialized) throws IOException {
+    this.structure = PreKeyRecordStructure.parseFrom(serialized);
+  }
+
+  public int getId() {
+    return this.structure.getId();
+  }
+
+  public ECKeyPair getKeyPair() {
+    try {
+      ECPublicKey publicKey = Curve.decodePoint(this.structure.getPublicKey().toByteArray(), 0);
+      ECPrivateKey privateKey = Curve.decodePrivatePoint(this.structure.getPrivateKey().toByteArray());
+
+      return new ECKeyPair(publicKey, privateKey);
+    } catch (InvalidKeyException e) {
+      throw new AssertionError(e);
+    }
+  }
+
+  public byte[] serialize() {
+    return this.structure.toByteArray();
+  }
+}
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);
+
+}
diff --git a/src/main/java/org/whispersystems/libaxolotl/state/SessionRecord.java b/src/main/java/org/whispersystems/libaxolotl/state/SessionRecord.java
new file mode 100644
index 00000000..76c64922
--- /dev/null
+++ b/src/main/java/org/whispersystems/libaxolotl/state/SessionRecord.java
@@ -0,0 +1,117 @@
+package org.whispersystems.libaxolotl.state;
+
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.LinkedList;
+import java.util.List;
+
+import static org.whispersystems.libaxolotl.state.StorageProtos.RecordStructure;
+import static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure;
+
+/**
+ * A SessionRecord encapsulates the state of an ongoing session.
+ *
+ * @author Moxie Marlinspike
+ */
+public class SessionRecord {
+
+  private static final int ARCHIVED_STATES_MAX_LENGTH = 40;
+
+  private SessionState             sessionState   = new SessionState();
+  private LinkedList<SessionState> previousStates = new LinkedList<>();
+  private boolean                  fresh          = false;
+
+  public SessionRecord() {
+    this.fresh = true;
+  }
+
+  public SessionRecord(SessionState sessionState) {
+    this.sessionState = sessionState;
+    this.fresh        = false;
+  }
+
+  public SessionRecord(byte[] serialized) throws IOException {
+    RecordStructure record = RecordStructure.parseFrom(serialized);
+    this.sessionState = new SessionState(record.getCurrentSession());
+    this.fresh        = false;
+
+    for (SessionStructure previousStructure : record.getPreviousSessionsList()) {
+      previousStates.add(new SessionState(previousStructure));
+    }
+  }
+
+  public boolean hasSessionState(int version, byte[] aliceBaseKey) {
+    if (sessionState.getSessionVersion() == version &&
+        Arrays.equals(aliceBaseKey, sessionState.getAliceBaseKey()))
+    {
+      return true;
+    }
+
+    for (SessionState state : previousStates) {
+      if (state.getSessionVersion() == version &&
+          Arrays.equals(aliceBaseKey, state.getAliceBaseKey()))
+      {
+        return true;
+      }
+    }
+
+    return false;
+  }
+
+  public SessionState getSessionState() {
+    return sessionState;
+  }
+
+  /**
+   * @return the list of all currently maintained "previous" session states.
+   */
+  public List<SessionState> getPreviousSessionStates() {
+    return previousStates;
+  }
+
+
+  public boolean isFresh() {
+    return fresh;
+  }
+
+  /**
+   * Move the current {@link SessionState} into the list of "previous" session states,
+   * and replace the current {@link org.whispersystems.libaxolotl.state.SessionState}
+   * with a fresh reset instance.
+   */
+  public void archiveCurrentState() {
+    promoteState(new SessionState());
+  }
+
+  public void promoteState(SessionState promotedState) {
+    this.previousStates.addFirst(sessionState);
+    this.sessionState = promotedState;
+
+    if (previousStates.size() > ARCHIVED_STATES_MAX_LENGTH) {
+      previousStates.removeLast();
+    }
+  }
+
+  public void setState(SessionState sessionState) {
+    this.sessionState = sessionState;
+  }
+
+  /**
+   * @return a serialized version of the current SessionRecord.
+   */
+  public byte[] serialize() {
+    List<SessionStructure> previousStructures = new LinkedList<>();
+
+    for (SessionState previousState : previousStates) {
+      previousStructures.add(previousState.getStructure());
+    }
+
+    RecordStructure record = RecordStructure.newBuilder()
+                                            .setCurrentSession(sessionState.getStructure())
+                                            .addAllPreviousSessions(previousStructures)
+                                            .build();
+
+    return record.toByteArray();
+  }
+
+}
diff --git a/src/main/java/org/whispersystems/libaxolotl/state/SessionState.java b/src/main/java/org/whispersystems/libaxolotl/state/SessionState.java
new file mode 100644
index 00000000..9b2b1e2a
--- /dev/null
+++ b/src/main/java/org/whispersystems/libaxolotl/state/SessionState.java
@@ -0,0 +1,509 @@
+/**
+ * Copyright (C) 2014 Open Whisper Systems
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.whispersystems.libaxolotl.state;
+
+import android.util.Log;
+
+import com.google.protobuf.ByteString;
+
+import org.whispersystems.libaxolotl.IdentityKey;
+import org.whispersystems.libaxolotl.IdentityKeyPair;
+import org.whispersystems.libaxolotl.InvalidKeyException;
+import org.whispersystems.libaxolotl.ecc.Curve;
+import org.whispersystems.libaxolotl.ecc.ECKeyPair;
+import org.whispersystems.libaxolotl.ecc.ECPrivateKey;
+import org.whispersystems.libaxolotl.ecc.ECPublicKey;
+import org.whispersystems.libaxolotl.kdf.HKDF;
+import org.whispersystems.libaxolotl.ratchet.ChainKey;
+import org.whispersystems.libaxolotl.ratchet.MessageKeys;
+import org.whispersystems.libaxolotl.ratchet.RootKey;
+import org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain;
+import org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange;
+import org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey;
+import org.whispersystems.libaxolotl.util.Pair;
+import org.whispersystems.libaxolotl.util.guava.Optional;
+
+import java.util.Iterator;
+import java.util.LinkedList;
+import java.util.List;
+
+import javax.crypto.spec.IvParameterSpec;
+import javax.crypto.spec.SecretKeySpec;
+
+import static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure;
+
+public class SessionState {
+
+  private SessionStructure sessionStructure;
+
+  public SessionState() {
+    this.sessionStructure = SessionStructure.newBuilder().build();
+  }
+
+  public SessionState(SessionStructure sessionStructure) {
+    this.sessionStructure = sessionStructure;
+  }
+
+  public SessionState(SessionState copy) {
+    this.sessionStructure = copy.sessionStructure.toBuilder().build();
+  }
+
+  public SessionStructure getStructure() {
+    return sessionStructure;
+  }
+
+  public byte[] getAliceBaseKey() {
+    return this.sessionStructure.getAliceBaseKey().toByteArray();
+  }
+
+  public void setAliceBaseKey(byte[] aliceBaseKey) {
+    this.sessionStructure = this.sessionStructure.toBuilder()
+                                                 .setAliceBaseKey(ByteString.copyFrom(aliceBaseKey))
+                                                 .build();
+  }
+
+  public void setSessionVersion(int version) {
+    this.sessionStructure = this.sessionStructure.toBuilder()
+                                                 .setSessionVersion(version)
+                                                 .build();
+  }
+
+  public int getSessionVersion() {
+    int sessionVersion = this.sessionStructure.getSessionVersion();
+
+    if (sessionVersion == 0) return 2;
+    else                     return sessionVersion;
+  }
+
+  public void setRemoteIdentityKey(IdentityKey identityKey) {
+    this.sessionStructure = this.sessionStructure.toBuilder()
+                                                 .setRemoteIdentityPublic(ByteString.copyFrom(identityKey.serialize()))
+                                                 .build();
+  }
+
+  public void setLocalIdentityKey(IdentityKey identityKey) {
+    this.sessionStructure = this.sessionStructure.toBuilder()
+                                                 .setLocalIdentityPublic(ByteString.copyFrom(identityKey.serialize()))
+                                                 .build();
+  }
+
+  public IdentityKey getRemoteIdentityKey() {
+    try {
+      if (!this.sessionStructure.hasRemoteIdentityPublic()) {
+        return null;
+      }
+
+      return new IdentityKey(this.sessionStructure.getRemoteIdentityPublic().toByteArray(), 0);
+    } catch (InvalidKeyException e) {
+      Log.w("SessionRecordV2", e);
+      return null;
+    }
+  }
+
+  public IdentityKey getLocalIdentityKey() {
+    try {
+      return new IdentityKey(this.sessionStructure.getLocalIdentityPublic().toByteArray(), 0);
+    } catch (InvalidKeyException e) {
+      throw new AssertionError(e);
+    }
+  }
+
+  public int getPreviousCounter() {
+    return sessionStructure.getPreviousCounter();
+  }
+
+  public void setPreviousCounter(int previousCounter) {
+    this.sessionStructure = this.sessionStructure.toBuilder()
+                                                 .setPreviousCounter(previousCounter)
+                                                 .build();
+  }
+
+  public RootKey getRootKey() {
+    return new RootKey(HKDF.createFor(getSessionVersion()),
+                       this.sessionStructure.getRootKey().toByteArray());
+  }
+
+  public void setRootKey(RootKey rootKey) {
+    this.sessionStructure = this.sessionStructure.toBuilder()
+                                                 .setRootKey(ByteString.copyFrom(rootKey.getKeyBytes()))
+                                                 .build();
+  }
+
+  public ECPublicKey getSenderRatchetKey() {
+    try {
+      return Curve.decodePoint(sessionStructure.getSenderChain().getSenderRatchetKey().toByteArray(), 0);
+    } catch (InvalidKeyException e) {
+      throw new AssertionError(e);
+    }
+  }
+
+  public ECKeyPair getSenderRatchetKeyPair() {
+    ECPublicKey  publicKey  = getSenderRatchetKey();
+    ECPrivateKey privateKey = Curve.decodePrivatePoint(sessionStructure.getSenderChain()
+                                                                       .getSenderRatchetKeyPrivate()
+                                                                       .toByteArray());
+
+    return new ECKeyPair(publicKey, privateKey);
+  }
+
+  public boolean hasReceiverChain(ECPublicKey senderEphemeral) {
+    return getReceiverChain(senderEphemeral) != null;
+  }
+
+  public boolean hasSenderChain() {
+    return sessionStructure.hasSenderChain();
+  }
+
+  private Pair<Chain,Integer> getReceiverChain(ECPublicKey senderEphemeral) {
+    List<Chain> receiverChains = sessionStructure.getReceiverChainsList();
+    int         index          = 0;
+
+    for (Chain receiverChain : receiverChains) {
+      try {
+        ECPublicKey chainSenderRatchetKey = Curve.decodePoint(receiverChain.getSenderRatchetKey().toByteArray(), 0);
+
+        if (chainSenderRatchetKey.equals(senderEphemeral)) {
+          return new Pair<>(receiverChain,index);
+        }
+      } catch (InvalidKeyException e) {
+        Log.w("SessionRecordV2", e);
+      }
+
+      index++;
+    }
+
+    return null;
+  }
+
+  public ChainKey getReceiverChainKey(ECPublicKey senderEphemeral) {
+    Pair<Chain,Integer> receiverChainAndIndex = getReceiverChain(senderEphemeral);
+    Chain               receiverChain         = receiverChainAndIndex.first();
+
+    if (receiverChain == null) {
+      return null;
+    } else {
+      return new ChainKey(HKDF.createFor(getSessionVersion()),
+                          receiverChain.getChainKey().getKey().toByteArray(),
+                          receiverChain.getChainKey().getIndex());
+    }
+  }
+
+  public void addReceiverChain(ECPublicKey senderRatchetKey, ChainKey chainKey) {
+    Chain.ChainKey chainKeyStructure = Chain.ChainKey.newBuilder()
+                                                     .setKey(ByteString.copyFrom(chainKey.getKey()))
+                                                     .setIndex(chainKey.getIndex())
+                                                     .build();
+
+    Chain chain = Chain.newBuilder()
+                       .setChainKey(chainKeyStructure)
+                       .setSenderRatchetKey(ByteString.copyFrom(senderRatchetKey.serialize()))
+                       .build();
+
+    this.sessionStructure = this.sessionStructure.toBuilder().addReceiverChains(chain).build();
+
+    if (this.sessionStructure.getReceiverChainsList().size() > 5) {
+      this.sessionStructure = this.sessionStructure.toBuilder()
+                                                   .removeReceiverChains(0)
+                                                   .build();
+    }
+  }
+
+  public void setSenderChain(ECKeyPair senderRatchetKeyPair, ChainKey chainKey) {
+    Chain.ChainKey chainKeyStructure = Chain.ChainKey.newBuilder()
+                                                     .setKey(ByteString.copyFrom(chainKey.getKey()))
+                                                     .setIndex(chainKey.getIndex())
+                                                     .build();
+
+    Chain senderChain = Chain.newBuilder()
+                             .setSenderRatchetKey(ByteString.copyFrom(senderRatchetKeyPair.getPublicKey().serialize()))
+                             .setSenderRatchetKeyPrivate(ByteString.copyFrom(senderRatchetKeyPair.getPrivateKey().serialize()))
+                             .setChainKey(chainKeyStructure)
+                             .build();
+
+    this.sessionStructure = this.sessionStructure.toBuilder().setSenderChain(senderChain).build();
+  }
+
+  public ChainKey getSenderChainKey() {
+    Chain.ChainKey chainKeyStructure = sessionStructure.getSenderChain().getChainKey();
+    return new ChainKey(HKDF.createFor(getSessionVersion()),
+                        chainKeyStructure.getKey().toByteArray(), chainKeyStructure.getIndex());
+  }
+
+
+  public void setSenderChainKey(ChainKey nextChainKey) {
+    Chain.ChainKey chainKey = Chain.ChainKey.newBuilder()
+                                            .setKey(ByteString.copyFrom(nextChainKey.getKey()))
+                                            .setIndex(nextChainKey.getIndex())
+                                            .build();
+
+    Chain chain = sessionStructure.getSenderChain().toBuilder()
+                                  .setChainKey(chainKey).build();
+
+    this.sessionStructure = this.sessionStructure.toBuilder().setSenderChain(chain).build();
+  }
+
+  public boolean hasMessageKeys(ECPublicKey senderEphemeral, int counter) {
+    Pair<Chain,Integer> chainAndIndex = getReceiverChain(senderEphemeral);
+    Chain               chain         = chainAndIndex.first();
+
+    if (chain == null) {
+      return false;
+    }
+
+    List<Chain.MessageKey> messageKeyList = chain.getMessageKeysList();
+
+    for (Chain.MessageKey messageKey : messageKeyList) {
+      if (messageKey.getIndex() == counter) {
+        return true;
+      }
+    }
+
+    return false;
+  }
+
+  public MessageKeys removeMessageKeys(ECPublicKey senderEphemeral, int counter) {
+    Pair<Chain,Integer> chainAndIndex = getReceiverChain(senderEphemeral);
+    Chain               chain         = chainAndIndex.first();
+
+    if (chain == null) {
+      return null;
+    }
+
+    List<Chain.MessageKey>     messageKeyList     = new LinkedList<>(chain.getMessageKeysList());
+    Iterator<Chain.MessageKey> messageKeyIterator = messageKeyList.iterator();
+    MessageKeys                result             = null;
+
+    while (messageKeyIterator.hasNext()) {
+      Chain.MessageKey messageKey = messageKeyIterator.next();
+
+      if (messageKey.getIndex() == counter) {
+        result = new MessageKeys(new SecretKeySpec(messageKey.getCipherKey().toByteArray(), "AES"),
+                                 new SecretKeySpec(messageKey.getMacKey().toByteArray(), "HmacSHA256"),
+                                 new IvParameterSpec(messageKey.getIv().toByteArray()),
+                                 messageKey.getIndex());
+
+        messageKeyIterator.remove();
+        break;
+      }
+    }
+
+    Chain updatedChain = chain.toBuilder().clearMessageKeys()
+                              .addAllMessageKeys(messageKeyList)
+                              .build();
+
+    this.sessionStructure = this.sessionStructure.toBuilder()
+                                                 .setReceiverChains(chainAndIndex.second(), updatedChain)
+                                                 .build();
+
+    return result;
+  }
+
+  public void setMessageKeys(ECPublicKey senderEphemeral, MessageKeys messageKeys) {
+    Pair<Chain,Integer> chainAndIndex       = getReceiverChain(senderEphemeral);
+    Chain               chain               = chainAndIndex.first();
+    Chain.MessageKey    messageKeyStructure = Chain.MessageKey.newBuilder()
+                                                              .setCipherKey(ByteString.copyFrom(messageKeys.getCipherKey().getEncoded()))
+                                                              .setMacKey(ByteString.copyFrom(messageKeys.getMacKey().getEncoded()))
+                                                              .setIndex(messageKeys.getCounter())
+                                                              .setIv(ByteString.copyFrom(messageKeys.getIv().getIV()))
+                                                              .build();
+
+    Chain updatedChain = chain.toBuilder()
+                              .addMessageKeys(messageKeyStructure)
+                              .build();
+
+    this.sessionStructure = this.sessionStructure.toBuilder()
+                                                 .setReceiverChains(chainAndIndex.second(), updatedChain)
+                                                 .build();
+  }
+
+  public void setReceiverChainKey(ECPublicKey senderEphemeral, ChainKey chainKey) {
+    Pair<Chain,Integer> chainAndIndex = getReceiverChain(senderEphemeral);
+    Chain               chain         = chainAndIndex.first();
+
+    Chain.ChainKey chainKeyStructure = Chain.ChainKey.newBuilder()
+                                                     .setKey(ByteString.copyFrom(chainKey.getKey()))
+                                                     .setIndex(chainKey.getIndex())
+                                                     .build();
+
+    Chain updatedChain = chain.toBuilder().setChainKey(chainKeyStructure).build();
+
+    this.sessionStructure = this.sessionStructure.toBuilder()
+                                                 .setReceiverChains(chainAndIndex.second(), updatedChain)
+                                                 .build();
+  }
+
+  public void setPendingKeyExchange(int sequence,
+                                    ECKeyPair ourBaseKey,
+                                    ECKeyPair ourRatchetKey,
+                                    IdentityKeyPair ourIdentityKey)
+  {
+    PendingKeyExchange structure =
+        PendingKeyExchange.newBuilder()
+                          .setSequence(sequence)
+                          .setLocalBaseKey(ByteString.copyFrom(ourBaseKey.getPublicKey().serialize()))
+                          .setLocalBaseKeyPrivate(ByteString.copyFrom(ourBaseKey.getPrivateKey().serialize()))
+                          .setLocalRatchetKey(ByteString.copyFrom(ourRatchetKey.getPublicKey().serialize()))
+                          .setLocalRatchetKeyPrivate(ByteString.copyFrom(ourRatchetKey.getPrivateKey().serialize()))
+                          .setLocalIdentityKey(ByteString.copyFrom(ourIdentityKey.getPublicKey().serialize()))
+                          .setLocalIdentityKeyPrivate(ByteString.copyFrom(ourIdentityKey.getPrivateKey().serialize()))
+                          .build();
+
+    this.sessionStructure = this.sessionStructure.toBuilder()
+                                                 .setPendingKeyExchange(structure)
+                                                 .build();
+  }
+
+  public int getPendingKeyExchangeSequence() {
+    return sessionStructure.getPendingKeyExchange().getSequence();
+  }
+
+  public ECKeyPair getPendingKeyExchangeBaseKey() throws InvalidKeyException {
+    ECPublicKey publicKey   = Curve.decodePoint(sessionStructure.getPendingKeyExchange()
+                                                                .getLocalBaseKey().toByteArray(), 0);
+
+    ECPrivateKey privateKey = Curve.decodePrivatePoint(sessionStructure.getPendingKeyExchange()
+                                                                       .getLocalBaseKeyPrivate()
+                                                                       .toByteArray());
+
+    return new ECKeyPair(publicKey, privateKey);
+  }
+
+  public ECKeyPair getPendingKeyExchangeRatchetKey() throws InvalidKeyException {
+    ECPublicKey publicKey   = Curve.decodePoint(sessionStructure.getPendingKeyExchange()
+                                                                .getLocalRatchetKey().toByteArray(), 0);
+
+    ECPrivateKey privateKey = Curve.decodePrivatePoint(sessionStructure.getPendingKeyExchange()
+                                                                       .getLocalRatchetKeyPrivate()
+                                                                       .toByteArray());
+
+    return new ECKeyPair(publicKey, privateKey);
+  }
+
+  public IdentityKeyPair getPendingKeyExchangeIdentityKey() throws InvalidKeyException {
+    IdentityKey publicKey = new IdentityKey(sessionStructure.getPendingKeyExchange()
+                                                            .getLocalIdentityKey().toByteArray(), 0);
+
+    ECPrivateKey privateKey = Curve.decodePrivatePoint(sessionStructure.getPendingKeyExchange()
+                                                                       .getLocalIdentityKeyPrivate()
+                                                                       .toByteArray());
+
+    return new IdentityKeyPair(publicKey, privateKey);
+  }
+
+  public boolean hasPendingKeyExchange() {
+    return sessionStructure.hasPendingKeyExchange();
+  }
+
+  public void setUnacknowledgedPreKeyMessage(Optional<Integer> preKeyId, int signedPreKeyId, ECPublicKey baseKey) {
+    PendingPreKey.Builder pending = PendingPreKey.newBuilder()
+                                                 .setSignedPreKeyId(signedPreKeyId)
+                                                 .setBaseKey(ByteString.copyFrom(baseKey.serialize()));
+
+    if (preKeyId.isPresent()) {
+      pending.setPreKeyId(preKeyId.get());
+    }
+
+    this.sessionStructure = this.sessionStructure.toBuilder()
+                                                 .setPendingPreKey(pending.build())
+                                                 .build();
+  }
+
+  public boolean hasUnacknowledgedPreKeyMessage() {
+    return this.sessionStructure.hasPendingPreKey();
+  }
+
+  public UnacknowledgedPreKeyMessageItems getUnacknowledgedPreKeyMessageItems() {
+    try {
+      Optional<Integer> preKeyId;
+
+      if (sessionStructure.getPendingPreKey().hasPreKeyId()) {
+        preKeyId = Optional.of(sessionStructure.getPendingPreKey().getPreKeyId());
+      } else {
+        preKeyId = Optional.absent();
+      }
+
+      return
+          new UnacknowledgedPreKeyMessageItems(preKeyId,
+                                               sessionStructure.getPendingPreKey().getSignedPreKeyId(),
+                                               Curve.decodePoint(sessionStructure.getPendingPreKey()
+                                                                                 .getBaseKey()
+                                                                                 .toByteArray(), 0));
+    } catch (InvalidKeyException e) {
+      throw new AssertionError(e);
+    }
+  }
+
+  public void clearUnacknowledgedPreKeyMessage() {
+    this.sessionStructure = this.sessionStructure.toBuilder()
+                                                 .clearPendingPreKey()
+                                                 .build();
+  }
+
+  public void setRemoteRegistrationId(int registrationId) {
+    this.sessionStructure = this.sessionStructure.toBuilder()
+                                                 .setRemoteRegistrationId(registrationId)
+                                                 .build();
+  }
+
+  public int getRemoteRegistrationId() {
+    return this.sessionStructure.getRemoteRegistrationId();
+  }
+
+  public void setLocalRegistrationId(int registrationId) {
+    this.sessionStructure = this.sessionStructure.toBuilder()
+                                                 .setLocalRegistrationId(registrationId)
+                                                 .build();
+  }
+
+  public int getLocalRegistrationId() {
+    return this.sessionStructure.getLocalRegistrationId();
+  }
+
+  public byte[] serialize() {
+    return sessionStructure.toByteArray();
+  }
+
+  public static class UnacknowledgedPreKeyMessageItems {
+    private final Optional<Integer> preKeyId;
+    private final int               signedPreKeyId;
+    private final ECPublicKey       baseKey;
+
+    public UnacknowledgedPreKeyMessageItems(Optional<Integer> preKeyId,
+                                            int signedPreKeyId,
+                                            ECPublicKey baseKey)
+    {
+      this.preKeyId       = preKeyId;
+      this.signedPreKeyId = signedPreKeyId;
+      this.baseKey        = baseKey;
+    }
+
+
+    public Optional<Integer> getPreKeyId() {
+      return preKeyId;
+    }
+
+    public int getSignedPreKeyId() {
+      return signedPreKeyId;
+    }
+
+    public ECPublicKey getBaseKey() {
+      return baseKey;
+    }
+  }
+}
diff --git a/src/main/java/org/whispersystems/libaxolotl/state/SessionStore.java b/src/main/java/org/whispersystems/libaxolotl/state/SessionStore.java
new file mode 100644
index 00000000..c5ad00b0
--- /dev/null
+++ b/src/main/java/org/whispersystems/libaxolotl/state/SessionStore.java
@@ -0,0 +1,68 @@
+package org.whispersystems.libaxolotl.state;
+
+import java.util.List;
+
+/**
+ * The interface to the durable store of session state information
+ * for remote clients.
+ *
+ * @author Moxie Marlinspike
+ */
+public interface SessionStore {
+
+  /**
+   * Returns a copy of the {@link SessionRecord} corresponding to the recipientId + deviceId tuple,
+   * or a new SessionRecord if one does not currently exist.
+   * <p>
+   * It is important that implementations return a copy of the current durable information.  The
+   * returned SessionRecord may be modified, but those changes should not have an effect on the
+   * durable session state (what is returned by subsequent calls to this method) without the
+   * store method being called here first.
+   *
+   * @param recipientId The recipientID of the remote client.
+   * @param deviceId The deviceID of the remote client.
+   * @return a copy of the SessionRecord corresponding to the recipientId + deviceId tuple, or
+   *         a new SessionRecord if one does not currently exist.
+   */
+  public SessionRecord loadSession(long recipientId, int deviceId);
+
+  /**
+   * Returns all known devices with active sessions for a recipient
+   *
+   * @param recipientId the recipient ID.
+   * @return all known sub-devices with active sessions.
+   */
+  public List<Integer> getSubDeviceSessions(long recipientId);
+
+  /**
+   * Commit to storage the {@link SessionRecord} for a given recipientId + deviceId tuple.
+   * @param recipientId the recipient ID of the remote client.
+   * @param deviceId the device ID of the remote client.
+   * @param record the current SessionRecord for the remote client.
+   */
+  public void storeSession(long recipientId, int deviceId, SessionRecord record);
+
+  /**
+   * Determine whether there is a committed {@link SessionRecord} for a recipientId + deviceId tuple.
+   * @param recipientId the recipient ID of the remote client.
+   * @param deviceId the device ID of the remote client.
+   * @return true if a {@link SessionRecord} exists, false otherwise.
+   */
+  public boolean containsSession(long recipientId, int deviceId);
+
+  /**
+   * Remove a {@link SessionRecord} for a recipientId + deviceId tuple.
+   *
+   * @param recipientId the recipient ID of the remote client.
+   * @param deviceId the device ID of the remote client.
+   */
+  public void deleteSession(long recipientId, int deviceId);
+
+  /**
+   * Remove the {@link SessionRecord}s corresponding to all devices of a recipientId.
+   *
+   * @param recipientId the recipient ID of the remote client.
+   */
+  public void deleteAllSessions(long recipientId);
+
+}
diff --git a/src/main/java/org/whispersystems/libaxolotl/state/SignedPreKeyRecord.java b/src/main/java/org/whispersystems/libaxolotl/state/SignedPreKeyRecord.java
new file mode 100644
index 00000000..f11f5cf1
--- /dev/null
+++ b/src/main/java/org/whispersystems/libaxolotl/state/SignedPreKeyRecord.java
@@ -0,0 +1,61 @@
+package org.whispersystems.libaxolotl.state;
+
+import com.google.protobuf.ByteString;
+
+import org.whispersystems.libaxolotl.InvalidKeyException;
+import org.whispersystems.libaxolotl.ecc.Curve;
+import org.whispersystems.libaxolotl.ecc.ECKeyPair;
+import org.whispersystems.libaxolotl.ecc.ECPrivateKey;
+import org.whispersystems.libaxolotl.ecc.ECPublicKey;
+
+import java.io.IOException;
+
+import static org.whispersystems.libaxolotl.state.StorageProtos.SignedPreKeyRecordStructure;
+
+public class SignedPreKeyRecord {
+
+  private SignedPreKeyRecordStructure structure;
+
+  public SignedPreKeyRecord(int id, long timestamp, ECKeyPair keyPair, byte[] signature) {
+    this.structure = SignedPreKeyRecordStructure.newBuilder()
+                                                .setId(id)
+                                                .setPublicKey(ByteString.copyFrom(keyPair.getPublicKey()
+                                                                                         .serialize()))
+                                                .setPrivateKey(ByteString.copyFrom(keyPair.getPrivateKey()
+                                                                                          .serialize()))
+                                                .setSignature(ByteString.copyFrom(signature))
+                                                .setTimestamp(timestamp)
+                                                .build();
+  }
+
+  public SignedPreKeyRecord(byte[] serialized) throws IOException {
+    this.structure = SignedPreKeyRecordStructure.parseFrom(serialized);
+  }
+
+  public int getId() {
+    return this.structure.getId();
+  }
+
+  public long getTimestamp() {
+    return this.structure.getTimestamp();
+  }
+
+  public ECKeyPair getKeyPair() {
+    try {
+      ECPublicKey publicKey = Curve.decodePoint(this.structure.getPublicKey().toByteArray(), 0);
+      ECPrivateKey privateKey = Curve.decodePrivatePoint(this.structure.getPrivateKey().toByteArray());
+
+      return new ECKeyPair(publicKey, privateKey);
+    } catch (InvalidKeyException e) {
+      throw new AssertionError(e);
+    }
+  }
+
+  public byte[] getSignature() {
+    return this.structure.getSignature().toByteArray();
+  }
+
+  public byte[] serialize() {
+    return this.structure.toByteArray();
+  }
+}
diff --git a/src/main/java/org/whispersystems/libaxolotl/state/SignedPreKeyStore.java b/src/main/java/org/whispersystems/libaxolotl/state/SignedPreKeyStore.java
new file mode 100644
index 00000000..c828bf23
--- /dev/null
+++ b/src/main/java/org/whispersystems/libaxolotl/state/SignedPreKeyStore.java
@@ -0,0 +1,47 @@
+package org.whispersystems.libaxolotl.state;
+
+import org.whispersystems.libaxolotl.InvalidKeyIdException;
+
+import java.util.List;
+
+public interface SignedPreKeyStore {
+
+
+  /**
+   * Load a local SignedPreKeyRecord.
+   *
+   * @param signedPreKeyId the ID of the local SignedPreKeyRecord.
+   * @return the corresponding SignedPreKeyRecord.
+   * @throws InvalidKeyIdException when there is no corresponding SignedPreKeyRecord.
+   */
+  public SignedPreKeyRecord loadSignedPreKey(int signedPreKeyId) throws InvalidKeyIdException;
+
+  /**
+   * Load all local SignedPreKeyRecords.
+   *
+   * @return All stored SignedPreKeyRecords.
+   */
+  public List<SignedPreKeyRecord> loadSignedPreKeys();
+
+  /**
+   * Store a local SignedPreKeyRecord.
+   *
+   * @param signedPreKeyId the ID of the SignedPreKeyRecord to store.
+   * @param record the SignedPreKeyRecord.
+   */
+  public void         storeSignedPreKey(int signedPreKeyId, SignedPreKeyRecord record);
+
+  /**
+   * @param signedPreKeyId A SignedPreKeyRecord ID.
+   * @return true if the store has a record for the signedPreKeyId, otherwise false.
+   */
+  public boolean      containsSignedPreKey(int signedPreKeyId);
+
+  /**
+   * Delete a SignedPreKeyRecord from local storage.
+   *
+   * @param signedPreKeyId The ID of the SignedPreKeyRecord to remove.
+   */
+  public void         removeSignedPreKey(int signedPreKeyId);
+
+}
diff --git a/src/main/java/org/whispersystems/libaxolotl/state/StorageProtos.java b/src/main/java/org/whispersystems/libaxolotl/state/StorageProtos.java
new file mode 100644
index 00000000..b3e3e0e6
--- /dev/null
+++ b/src/main/java/org/whispersystems/libaxolotl/state/StorageProtos.java
@@ -0,0 +1,11779 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: LocalStorageProtocol.proto
+
+package org.whispersystems.libaxolotl.state;
+
+public final class StorageProtos {
+  private StorageProtos() {}
+  public static void registerAllExtensions(
+      com.google.protobuf.ExtensionRegistry registry) {
+  }
+  public interface SessionStructureOrBuilder
+      extends com.google.protobuf.MessageOrBuilder {
+
+    // optional uint32 sessionVersion = 1;
+    /**
+     * <code>optional uint32 sessionVersion = 1;</code>
+     */
+    boolean hasSessionVersion();
+    /**
+     * <code>optional uint32 sessionVersion = 1;</code>
+     */
+    int getSessionVersion();
+
+    // optional bytes localIdentityPublic = 2;
+    /**
+     * <code>optional bytes localIdentityPublic = 2;</code>
+     */
+    boolean hasLocalIdentityPublic();
+    /**
+     * <code>optional bytes localIdentityPublic = 2;</code>
+     */
+    com.google.protobuf.ByteString getLocalIdentityPublic();
+
+    // optional bytes remoteIdentityPublic = 3;
+    /**
+     * <code>optional bytes remoteIdentityPublic = 3;</code>
+     */
+    boolean hasRemoteIdentityPublic();
+    /**
+     * <code>optional bytes remoteIdentityPublic = 3;</code>
+     */
+    com.google.protobuf.ByteString getRemoteIdentityPublic();
+
+    // optional bytes rootKey = 4;
+    /**
+     * <code>optional bytes rootKey = 4;</code>
+     */
+    boolean hasRootKey();
+    /**
+     * <code>optional bytes rootKey = 4;</code>
+     */
+    com.google.protobuf.ByteString getRootKey();
+
+    // optional uint32 previousCounter = 5;
+    /**
+     * <code>optional uint32 previousCounter = 5;</code>
+     */
+    boolean hasPreviousCounter();
+    /**
+     * <code>optional uint32 previousCounter = 5;</code>
+     */
+    int getPreviousCounter();
+
+    // optional .textsecure.SessionStructure.Chain senderChain = 6;
+    /**
+     * <code>optional .textsecure.SessionStructure.Chain senderChain = 6;</code>
+     */
+    boolean hasSenderChain();
+    /**
+     * <code>optional .textsecure.SessionStructure.Chain senderChain = 6;</code>
+     */
+    org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain getSenderChain();
+    /**
+     * <code>optional .textsecure.SessionStructure.Chain senderChain = 6;</code>
+     */
+    org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.ChainOrBuilder getSenderChainOrBuilder();
+
+    // repeated .textsecure.SessionStructure.Chain receiverChains = 7;
+    /**
+     * <code>repeated .textsecure.SessionStructure.Chain receiverChains = 7;</code>
+     */
+    java.util.List<org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain> 
+        getReceiverChainsList();
+    /**
+     * <code>repeated .textsecure.SessionStructure.Chain receiverChains = 7;</code>
+     */
+    org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain getReceiverChains(int index);
+    /**
+     * <code>repeated .textsecure.SessionStructure.Chain receiverChains = 7;</code>
+     */
+    int getReceiverChainsCount();
+    /**
+     * <code>repeated .textsecure.SessionStructure.Chain receiverChains = 7;</code>
+     */
+    java.util.List<? extends org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.ChainOrBuilder> 
+        getReceiverChainsOrBuilderList();
+    /**
+     * <code>repeated .textsecure.SessionStructure.Chain receiverChains = 7;</code>
+     */
+    org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.ChainOrBuilder getReceiverChainsOrBuilder(
+        int index);
+
+    // optional .textsecure.SessionStructure.PendingKeyExchange pendingKeyExchange = 8;
+    /**
+     * <code>optional .textsecure.SessionStructure.PendingKeyExchange pendingKeyExchange = 8;</code>
+     */
+    boolean hasPendingKeyExchange();
+    /**
+     * <code>optional .textsecure.SessionStructure.PendingKeyExchange pendingKeyExchange = 8;</code>
+     */
+    org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange getPendingKeyExchange();
+    /**
+     * <code>optional .textsecure.SessionStructure.PendingKeyExchange pendingKeyExchange = 8;</code>
+     */
+    org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchangeOrBuilder getPendingKeyExchangeOrBuilder();
+
+    // optional .textsecure.SessionStructure.PendingPreKey pendingPreKey = 9;
+    /**
+     * <code>optional .textsecure.SessionStructure.PendingPreKey pendingPreKey = 9;</code>
+     */
+    boolean hasPendingPreKey();
+    /**
+     * <code>optional .textsecure.SessionStructure.PendingPreKey pendingPreKey = 9;</code>
+     */
+    org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey getPendingPreKey();
+    /**
+     * <code>optional .textsecure.SessionStructure.PendingPreKey pendingPreKey = 9;</code>
+     */
+    org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKeyOrBuilder getPendingPreKeyOrBuilder();
+
+    // optional uint32 remoteRegistrationId = 10;
+    /**
+     * <code>optional uint32 remoteRegistrationId = 10;</code>
+     */
+    boolean hasRemoteRegistrationId();
+    /**
+     * <code>optional uint32 remoteRegistrationId = 10;</code>
+     */
+    int getRemoteRegistrationId();
+
+    // optional uint32 localRegistrationId = 11;
+    /**
+     * <code>optional uint32 localRegistrationId = 11;</code>
+     */
+    boolean hasLocalRegistrationId();
+    /**
+     * <code>optional uint32 localRegistrationId = 11;</code>
+     */
+    int getLocalRegistrationId();
+
+    // optional bool needsRefresh = 12;
+    /**
+     * <code>optional bool needsRefresh = 12;</code>
+     */
+    boolean hasNeedsRefresh();
+    /**
+     * <code>optional bool needsRefresh = 12;</code>
+     */
+    boolean getNeedsRefresh();
+
+    // optional bytes aliceBaseKey = 13;
+    /**
+     * <code>optional bytes aliceBaseKey = 13;</code>
+     */
+    boolean hasAliceBaseKey();
+    /**
+     * <code>optional bytes aliceBaseKey = 13;</code>
+     */
+    com.google.protobuf.ByteString getAliceBaseKey();
+  }
+  /**
+   * Protobuf type {@code textsecure.SessionStructure}
+   */
+  public static final class SessionStructure extends
+      com.google.protobuf.GeneratedMessage
+      implements SessionStructureOrBuilder {
+    // Use SessionStructure.newBuilder() to construct.
+    private SessionStructure(com.google.protobuf.GeneratedMessage.Builder<?> builder) {
+      super(builder);
+      this.unknownFields = builder.getUnknownFields();
+    }
+    private SessionStructure(boolean noInit) { this.unknownFields = com.google.protobuf.UnknownFieldSet.getDefaultInstance(); }
+
+    private static final SessionStructure defaultInstance;
+    public static SessionStructure getDefaultInstance() {
+      return defaultInstance;
+    }
+
+    public SessionStructure getDefaultInstanceForType() {
+      return defaultInstance;
+    }
+
+    private final com.google.protobuf.UnknownFieldSet unknownFields;
+    @java.lang.Override
+    public final com.google.protobuf.UnknownFieldSet
+        getUnknownFields() {
+      return this.unknownFields;
+    }
+    private SessionStructure(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      initFields();
+      int mutable_bitField0_ = 0;
+      com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+          com.google.protobuf.UnknownFieldSet.newBuilder();
+      try {
+        boolean done = false;
+        while (!done) {
+          int tag = input.readTag();
+          switch (tag) {
+            case 0:
+              done = true;
+              break;
+            default: {
+              if (!parseUnknownField(input, unknownFields,
+                                     extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+            case 8: {
+              bitField0_ |= 0x00000001;
+              sessionVersion_ = input.readUInt32();
+              break;
+            }
+            case 18: {
+              bitField0_ |= 0x00000002;
+              localIdentityPublic_ = input.readBytes();
+              break;
+            }
+            case 26: {
+              bitField0_ |= 0x00000004;
+              remoteIdentityPublic_ = input.readBytes();
+              break;
+            }
+            case 34: {
+              bitField0_ |= 0x00000008;
+              rootKey_ = input.readBytes();
+              break;
+            }
+            case 40: {
+              bitField0_ |= 0x00000010;
+              previousCounter_ = input.readUInt32();
+              break;
+            }
+            case 50: {
+              org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.Builder subBuilder = null;
+              if (((bitField0_ & 0x00000020) == 0x00000020)) {
+                subBuilder = senderChain_.toBuilder();
+              }
+              senderChain_ = input.readMessage(org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.PARSER, extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(senderChain_);
+                senderChain_ = subBuilder.buildPartial();
+              }
+              bitField0_ |= 0x00000020;
+              break;
+            }
+            case 58: {
+              if (!((mutable_bitField0_ & 0x00000040) == 0x00000040)) {
+                receiverChains_ = new java.util.ArrayList<org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain>();
+                mutable_bitField0_ |= 0x00000040;
+              }
+              receiverChains_.add(input.readMessage(org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.PARSER, extensionRegistry));
+              break;
+            }
+            case 66: {
+              org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange.Builder subBuilder = null;
+              if (((bitField0_ & 0x00000040) == 0x00000040)) {
+                subBuilder = pendingKeyExchange_.toBuilder();
+              }
+              pendingKeyExchange_ = input.readMessage(org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange.PARSER, extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(pendingKeyExchange_);
+                pendingKeyExchange_ = subBuilder.buildPartial();
+              }
+              bitField0_ |= 0x00000040;
+              break;
+            }
+            case 74: {
+              org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey.Builder subBuilder = null;
+              if (((bitField0_ & 0x00000080) == 0x00000080)) {
+                subBuilder = pendingPreKey_.toBuilder();
+              }
+              pendingPreKey_ = input.readMessage(org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey.PARSER, extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(pendingPreKey_);
+                pendingPreKey_ = subBuilder.buildPartial();
+              }
+              bitField0_ |= 0x00000080;
+              break;
+            }
+            case 80: {
+              bitField0_ |= 0x00000100;
+              remoteRegistrationId_ = input.readUInt32();
+              break;
+            }
+            case 88: {
+              bitField0_ |= 0x00000200;
+              localRegistrationId_ = input.readUInt32();
+              break;
+            }
+            case 96: {
+              bitField0_ |= 0x00000400;
+              needsRefresh_ = input.readBool();
+              break;
+            }
+            case 106: {
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+              break;
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+        }
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        throw e.setUnfinishedMessage(this);
+      } catch (java.io.IOException e) {
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+            e.getMessage()).setUnfinishedMessage(this);
+      } finally {
+        if (((mutable_bitField0_ & 0x00000040) == 0x00000040)) {
+          receiverChains_ = java.util.Collections.unmodifiableList(receiverChains_);
+        }
+        this.unknownFields = unknownFields.build();
+        makeExtensionsImmutable();
+      }
+    }
+    public static final com.google.protobuf.Descriptors.Descriptor
+        getDescriptor() {
+      return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SessionStructure_descriptor;
+    }
+
+    protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SessionStructure_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.class, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Builder.class);
+    }
+
+    public static com.google.protobuf.Parser<SessionStructure> PARSER =
+        new com.google.protobuf.AbstractParser<SessionStructure>() {
+      public SessionStructure parsePartialFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return new SessionStructure(input, extensionRegistry);
+      }
+    };
+
+    @java.lang.Override
+    public com.google.protobuf.Parser<SessionStructure> getParserForType() {
+      return PARSER;
+    }
+
+    public interface ChainOrBuilder
+        extends com.google.protobuf.MessageOrBuilder {
+
+      // optional bytes senderRatchetKey = 1;
+      /**
+       * <code>optional bytes senderRatchetKey = 1;</code>
+       */
+      boolean hasSenderRatchetKey();
+      /**
+       * <code>optional bytes senderRatchetKey = 1;</code>
+       */
+      com.google.protobuf.ByteString getSenderRatchetKey();
+
+      // optional bytes senderRatchetKeyPrivate = 2;
+      /**
+       * <code>optional bytes senderRatchetKeyPrivate = 2;</code>
+       */
+      boolean hasSenderRatchetKeyPrivate();
+      /**
+       * <code>optional bytes senderRatchetKeyPrivate = 2;</code>
+       */
+      com.google.protobuf.ByteString getSenderRatchetKeyPrivate();
+
+      // optional .textsecure.SessionStructure.Chain.ChainKey chainKey = 3;
+      /**
+       * <code>optional .textsecure.SessionStructure.Chain.ChainKey chainKey = 3;</code>
+       */
+      boolean hasChainKey();
+      /**
+       * <code>optional .textsecure.SessionStructure.Chain.ChainKey chainKey = 3;</code>
+       */
+      org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey getChainKey();
+      /**
+       * <code>optional .textsecure.SessionStructure.Chain.ChainKey chainKey = 3;</code>
+       */
+      org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKeyOrBuilder getChainKeyOrBuilder();
+
+      // repeated .textsecure.SessionStructure.Chain.MessageKey messageKeys = 4;
+      /**
+       * <code>repeated .textsecure.SessionStructure.Chain.MessageKey messageKeys = 4;</code>
+       */
+      java.util.List<org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey> 
+          getMessageKeysList();
+      /**
+       * <code>repeated .textsecure.SessionStructure.Chain.MessageKey messageKeys = 4;</code>
+       */
+      org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey getMessageKeys(int index);
+      /**
+       * <code>repeated .textsecure.SessionStructure.Chain.MessageKey messageKeys = 4;</code>
+       */
+      int getMessageKeysCount();
+      /**
+       * <code>repeated .textsecure.SessionStructure.Chain.MessageKey messageKeys = 4;</code>
+       */
+      java.util.List<? extends org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKeyOrBuilder> 
+          getMessageKeysOrBuilderList();
+      /**
+       * <code>repeated .textsecure.SessionStructure.Chain.MessageKey messageKeys = 4;</code>
+       */
+      org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKeyOrBuilder getMessageKeysOrBuilder(
+          int index);
+    }
+    /**
+     * Protobuf type {@code textsecure.SessionStructure.Chain}
+     */
+    public static final class Chain extends
+        com.google.protobuf.GeneratedMessage
+        implements ChainOrBuilder {
+      // Use Chain.newBuilder() to construct.
+      private Chain(com.google.protobuf.GeneratedMessage.Builder<?> builder) {
+        super(builder);
+        this.unknownFields = builder.getUnknownFields();
+      }
+      private Chain(boolean noInit) { this.unknownFields = com.google.protobuf.UnknownFieldSet.getDefaultInstance(); }
+
+      private static final Chain defaultInstance;
+      public static Chain getDefaultInstance() {
+        return defaultInstance;
+      }
+
+      public Chain getDefaultInstanceForType() {
+        return defaultInstance;
+      }
+
+      private final com.google.protobuf.UnknownFieldSet unknownFields;
+      @java.lang.Override
+      public final com.google.protobuf.UnknownFieldSet
+          getUnknownFields() {
+        return this.unknownFields;
+      }
+      private Chain(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        initFields();
+        int mutable_bitField0_ = 0;
+        com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+            com.google.protobuf.UnknownFieldSet.newBuilder();
+        try {
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+          while (!done) {
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+            switch (tag) {
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+                break;
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+                                       extensionRegistry, tag)) {
+                  done = true;
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+                break;
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+              case 10: {
+                bitField0_ |= 0x00000001;
+                senderRatchetKey_ = input.readBytes();
+                break;
+              }
+              case 18: {
+                bitField0_ |= 0x00000002;
+                senderRatchetKeyPrivate_ = input.readBytes();
+                break;
+              }
+              case 26: {
+                org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey.Builder subBuilder = null;
+                if (((bitField0_ & 0x00000004) == 0x00000004)) {
+                  subBuilder = chainKey_.toBuilder();
+                }
+                chainKey_ = input.readMessage(org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey.PARSER, extensionRegistry);
+                if (subBuilder != null) {
+                  subBuilder.mergeFrom(chainKey_);
+                  chainKey_ = subBuilder.buildPartial();
+                }
+                bitField0_ |= 0x00000004;
+                break;
+              }
+              case 34: {
+                if (!((mutable_bitField0_ & 0x00000008) == 0x00000008)) {
+                  messageKeys_ = new java.util.ArrayList<org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey>();
+                  mutable_bitField0_ |= 0x00000008;
+                }
+                messageKeys_.add(input.readMessage(org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey.PARSER, extensionRegistry));
+                break;
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+          }
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+          if (((mutable_bitField0_ & 0x00000008) == 0x00000008)) {
+            messageKeys_ = java.util.Collections.unmodifiableList(messageKeys_);
+          }
+          this.unknownFields = unknownFields.build();
+          makeExtensionsImmutable();
+        }
+      }
+      public static final com.google.protobuf.Descriptors.Descriptor
+          getDescriptor() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SessionStructure_Chain_descriptor;
+      }
+
+      protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+          internalGetFieldAccessorTable() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SessionStructure_Chain_fieldAccessorTable
+            .ensureFieldAccessorsInitialized(
+                org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.class, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.Builder.class);
+      }
+
+      public static com.google.protobuf.Parser<Chain> PARSER =
+          new com.google.protobuf.AbstractParser<Chain>() {
+        public Chain parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new Chain(input, extensionRegistry);
+        }
+      };
+
+      @java.lang.Override
+      public com.google.protobuf.Parser<Chain> getParserForType() {
+        return PARSER;
+      }
+
+      public interface ChainKeyOrBuilder
+          extends com.google.protobuf.MessageOrBuilder {
+
+        // optional uint32 index = 1;
+        /**
+         * <code>optional uint32 index = 1;</code>
+         */
+        boolean hasIndex();
+        /**
+         * <code>optional uint32 index = 1;</code>
+         */
+        int getIndex();
+
+        // optional bytes key = 2;
+        /**
+         * <code>optional bytes key = 2;</code>
+         */
+        boolean hasKey();
+        /**
+         * <code>optional bytes key = 2;</code>
+         */
+        com.google.protobuf.ByteString getKey();
+      }
+      /**
+       * Protobuf type {@code textsecure.SessionStructure.Chain.ChainKey}
+       */
+      public static final class ChainKey extends
+          com.google.protobuf.GeneratedMessage
+          implements ChainKeyOrBuilder {
+        // Use ChainKey.newBuilder() to construct.
+        private ChainKey(com.google.protobuf.GeneratedMessage.Builder<?> builder) {
+          super(builder);
+          this.unknownFields = builder.getUnknownFields();
+        }
+        private ChainKey(boolean noInit) { this.unknownFields = com.google.protobuf.UnknownFieldSet.getDefaultInstance(); }
+
+        private static final ChainKey defaultInstance;
+        public static ChainKey getDefaultInstance() {
+          return defaultInstance;
+        }
+
+        public ChainKey getDefaultInstanceForType() {
+          return defaultInstance;
+        }
+
+        private final com.google.protobuf.UnknownFieldSet unknownFields;
+        @java.lang.Override
+        public final com.google.protobuf.UnknownFieldSet
+            getUnknownFields() {
+          return this.unknownFields;
+        }
+        private ChainKey(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          initFields();
+          int mutable_bitField0_ = 0;
+          com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+              com.google.protobuf.UnknownFieldSet.newBuilder();
+          try {
+            boolean done = false;
+            while (!done) {
+              int tag = input.readTag();
+              switch (tag) {
+                case 0:
+                  done = true;
+                  break;
+                default: {
+                  if (!parseUnknownField(input, unknownFields,
+                                         extensionRegistry, tag)) {
+                    done = true;
+                  }
+                  break;
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+                case 8: {
+                  bitField0_ |= 0x00000001;
+                  index_ = input.readUInt32();
+                  break;
+                }
+                case 18: {
+                  bitField0_ |= 0x00000002;
+                  key_ = input.readBytes();
+                  break;
+                }
+              }
+            }
+          } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+            throw e.setUnfinishedMessage(this);
+          } catch (java.io.IOException e) {
+            throw new com.google.protobuf.InvalidProtocolBufferException(
+                e.getMessage()).setUnfinishedMessage(this);
+          } finally {
+            this.unknownFields = unknownFields.build();
+            makeExtensionsImmutable();
+          }
+        }
+        public static final com.google.protobuf.Descriptors.Descriptor
+            getDescriptor() {
+          return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SessionStructure_Chain_ChainKey_descriptor;
+        }
+
+        protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+            internalGetFieldAccessorTable() {
+          return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SessionStructure_Chain_ChainKey_fieldAccessorTable
+              .ensureFieldAccessorsInitialized(
+                  org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey.class, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey.Builder.class);
+        }
+
+        public static com.google.protobuf.Parser<ChainKey> PARSER =
+            new com.google.protobuf.AbstractParser<ChainKey>() {
+          public ChainKey parsePartialFrom(
+              com.google.protobuf.CodedInputStream input,
+              com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+              throws com.google.protobuf.InvalidProtocolBufferException {
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+
+        @java.lang.Override
+        public com.google.protobuf.Parser<ChainKey> getParserForType() {
+          return PARSER;
+        }
+
+        private int bitField0_;
+        // optional uint32 index = 1;
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+        private int index_;
+        /**
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+         */
+        public boolean hasIndex() {
+          return ((bitField0_ & 0x00000001) == 0x00000001);
+        }
+        /**
+         * <code>optional uint32 index = 1;</code>
+         */
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+          return index_;
+        }
+
+        // optional bytes key = 2;
+        public static final int KEY_FIELD_NUMBER = 2;
+        private com.google.protobuf.ByteString key_;
+        /**
+         * <code>optional bytes key = 2;</code>
+         */
+        public boolean hasKey() {
+          return ((bitField0_ & 0x00000002) == 0x00000002);
+        }
+        /**
+         * <code>optional bytes key = 2;</code>
+         */
+        public com.google.protobuf.ByteString getKey() {
+          return key_;
+        }
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+        private void initFields() {
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+        private byte memoizedIsInitialized = -1;
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+          if (isInitialized != -1) return isInitialized == 1;
+
+          memoizedIsInitialized = 1;
+          return true;
+        }
+
+        public void writeTo(com.google.protobuf.CodedOutputStream output)
+                            throws java.io.IOException {
+          getSerializedSize();
+          if (((bitField0_ & 0x00000001) == 0x00000001)) {
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+          if (((bitField0_ & 0x00000002) == 0x00000002)) {
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+        }
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+        private int memoizedSerializedSize = -1;
+        public int getSerializedSize() {
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+          memoizedSerializedSize = size;
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+        }
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+        private static final long serialVersionUID = 0L;
+        @java.lang.Override
+        protected java.lang.Object writeReplace()
+            throws java.io.ObjectStreamException {
+          return super.writeReplace();
+        }
+
+        public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey parseFrom(
+            com.google.protobuf.ByteString data)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return PARSER.parseFrom(data);
+        }
+        public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey parseFrom(
+            com.google.protobuf.ByteString data,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return PARSER.parseFrom(data, extensionRegistry);
+        }
+        public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey parseFrom(byte[] data)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return PARSER.parseFrom(data);
+        }
+        public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey parseFrom(
+            byte[] data,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return PARSER.parseFrom(data, extensionRegistry);
+        }
+        public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey parseFrom(java.io.InputStream input)
+            throws java.io.IOException {
+          return PARSER.parseFrom(input);
+        }
+        public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey parseFrom(
+            java.io.InputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws java.io.IOException {
+          return PARSER.parseFrom(input, extensionRegistry);
+        }
+        public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey parseDelimitedFrom(java.io.InputStream input)
+            throws java.io.IOException {
+          return PARSER.parseDelimitedFrom(input);
+        }
+        public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey parseDelimitedFrom(
+            java.io.InputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws java.io.IOException {
+          return PARSER.parseDelimitedFrom(input, extensionRegistry);
+        }
+        public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey parseFrom(
+            com.google.protobuf.CodedInputStream input)
+            throws java.io.IOException {
+          return PARSER.parseFrom(input);
+        }
+        public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey parseFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws java.io.IOException {
+          return PARSER.parseFrom(input, extensionRegistry);
+        }
+
+        public static Builder newBuilder() { return Builder.create(); }
+        public Builder newBuilderForType() { return newBuilder(); }
+        public static Builder newBuilder(org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey prototype) {
+          return newBuilder().mergeFrom(prototype);
+        }
+        public Builder toBuilder() { return newBuilder(this); }
+
+        @java.lang.Override
+        protected Builder newBuilderForType(
+            com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+          Builder builder = new Builder(parent);
+          return builder;
+        }
+        /**
+         * Protobuf type {@code textsecure.SessionStructure.Chain.ChainKey}
+         */
+        public static final class Builder extends
+            com.google.protobuf.GeneratedMessage.Builder<Builder>
+           implements org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKeyOrBuilder {
+          public static final com.google.protobuf.Descriptors.Descriptor
+              getDescriptor() {
+            return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SessionStructure_Chain_ChainKey_descriptor;
+          }
+
+          protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+              internalGetFieldAccessorTable() {
+            return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SessionStructure_Chain_ChainKey_fieldAccessorTable
+                .ensureFieldAccessorsInitialized(
+                    org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey.class, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey.Builder.class);
+          }
+
+          // Construct using org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey.newBuilder()
+          private Builder() {
+            maybeForceBuilderInitialization();
+          }
+
+          private Builder(
+              com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+            super(parent);
+            maybeForceBuilderInitialization();
+          }
+          private void maybeForceBuilderInitialization() {
+            if (com.google.protobuf.GeneratedMessage.alwaysUseFieldBuilders) {
+            }
+          }
+          private static Builder create() {
+            return new Builder();
+          }
+
+          public Builder clear() {
+            super.clear();
+            index_ = 0;
+            bitField0_ = (bitField0_ & ~0x00000001);
+            key_ = com.google.protobuf.ByteString.EMPTY;
+            bitField0_ = (bitField0_ & ~0x00000002);
+            return this;
+          }
+
+          public Builder clone() {
+            return create().mergeFrom(buildPartial());
+          }
+
+          public com.google.protobuf.Descriptors.Descriptor
+              getDescriptorForType() {
+            return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SessionStructure_Chain_ChainKey_descriptor;
+          }
+
+          public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey getDefaultInstanceForType() {
+            return org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey.getDefaultInstance();
+          }
+
+          public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey build() {
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+            if (!result.isInitialized()) {
+              throw newUninitializedMessageException(result);
+            }
+            return result;
+          }
+
+          public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey buildPartial() {
+            org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey result = new org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey(this);
+            int from_bitField0_ = bitField0_;
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+            }
+            result.index_ = index_;
+            if (((from_bitField0_ & 0x00000002) == 0x00000002)) {
+              to_bitField0_ |= 0x00000002;
+            }
+            result.key_ = key_;
+            result.bitField0_ = to_bitField0_;
+            onBuilt();
+            return result;
+          }
+
+          public Builder mergeFrom(com.google.protobuf.Message other) {
+            if (other instanceof org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey) {
+              return mergeFrom((org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey)other);
+            } else {
+              super.mergeFrom(other);
+              return this;
+            }
+          }
+
+          public Builder mergeFrom(org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey other) {
+            if (other == org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey.getDefaultInstance()) return this;
+            if (other.hasIndex()) {
+              setIndex(other.getIndex());
+            }
+            if (other.hasKey()) {
+              setKey(other.getKey());
+            }
+            this.mergeUnknownFields(other.getUnknownFields());
+            return this;
+          }
+
+          public final boolean isInitialized() {
+            return true;
+          }
+
+          public Builder mergeFrom(
+              com.google.protobuf.CodedInputStream input,
+              com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+              throws java.io.IOException {
+            org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey parsedMessage = null;
+            try {
+              parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+            } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+              parsedMessage = (org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey) e.getUnfinishedMessage();
+              throw e;
+            } finally {
+              if (parsedMessage != null) {
+                mergeFrom(parsedMessage);
+              }
+            }
+            return this;
+          }
+          private int bitField0_;
+
+          // optional uint32 index = 1;
+          private int index_ ;
+          /**
+           * <code>optional uint32 index = 1;</code>
+           */
+          public boolean hasIndex() {
+            return ((bitField0_ & 0x00000001) == 0x00000001);
+          }
+          /**
+           * <code>optional uint32 index = 1;</code>
+           */
+          public int getIndex() {
+            return index_;
+          }
+          /**
+           * <code>optional uint32 index = 1;</code>
+           */
+          public Builder setIndex(int value) {
+            bitField0_ |= 0x00000001;
+            index_ = value;
+            onChanged();
+            return this;
+          }
+          /**
+           * <code>optional uint32 index = 1;</code>
+           */
+          public Builder clearIndex() {
+            bitField0_ = (bitField0_ & ~0x00000001);
+            index_ = 0;
+            onChanged();
+            return this;
+          }
+
+          // optional bytes key = 2;
+          private com.google.protobuf.ByteString key_ = com.google.protobuf.ByteString.EMPTY;
+          /**
+           * <code>optional bytes key = 2;</code>
+           */
+          public boolean hasKey() {
+            return ((bitField0_ & 0x00000002) == 0x00000002);
+          }
+          /**
+           * <code>optional bytes key = 2;</code>
+           */
+          public com.google.protobuf.ByteString getKey() {
+            return key_;
+          }
+          /**
+           * <code>optional bytes key = 2;</code>
+           */
+          public Builder setKey(com.google.protobuf.ByteString value) {
+            if (value == null) {
+    throw new NullPointerException();
+  }
+  bitField0_ |= 0x00000002;
+            key_ = value;
+            onChanged();
+            return this;
+          }
+          /**
+           * <code>optional bytes key = 2;</code>
+           */
+          public Builder clearKey() {
+            bitField0_ = (bitField0_ & ~0x00000002);
+            key_ = getDefaultInstance().getKey();
+            onChanged();
+            return this;
+          }
+
+          // @@protoc_insertion_point(builder_scope:textsecure.SessionStructure.Chain.ChainKey)
+        }
+
+        static {
+          defaultInstance = new ChainKey(true);
+          defaultInstance.initFields();
+        }
+
+        // @@protoc_insertion_point(class_scope:textsecure.SessionStructure.Chain.ChainKey)
+      }
+
+      public interface MessageKeyOrBuilder
+          extends com.google.protobuf.MessageOrBuilder {
+
+        // optional uint32 index = 1;
+        /**
+         * <code>optional uint32 index = 1;</code>
+         */
+        boolean hasIndex();
+        /**
+         * <code>optional uint32 index = 1;</code>
+         */
+        int getIndex();
+
+        // optional bytes cipherKey = 2;
+        /**
+         * <code>optional bytes cipherKey = 2;</code>
+         */
+        boolean hasCipherKey();
+        /**
+         * <code>optional bytes cipherKey = 2;</code>
+         */
+        com.google.protobuf.ByteString getCipherKey();
+
+        // optional bytes macKey = 3;
+        /**
+         * <code>optional bytes macKey = 3;</code>
+         */
+        boolean hasMacKey();
+        /**
+         * <code>optional bytes macKey = 3;</code>
+         */
+        com.google.protobuf.ByteString getMacKey();
+
+        // optional bytes iv = 4;
+        /**
+         * <code>optional bytes iv = 4;</code>
+         */
+        boolean hasIv();
+        /**
+         * <code>optional bytes iv = 4;</code>
+         */
+        com.google.protobuf.ByteString getIv();
+      }
+      /**
+       * Protobuf type {@code textsecure.SessionStructure.Chain.MessageKey}
+       */
+      public static final class MessageKey extends
+          com.google.protobuf.GeneratedMessage
+          implements MessageKeyOrBuilder {
+        // Use MessageKey.newBuilder() to construct.
+        private MessageKey(com.google.protobuf.GeneratedMessage.Builder<?> builder) {
+          super(builder);
+          this.unknownFields = builder.getUnknownFields();
+        }
+        private MessageKey(boolean noInit) { this.unknownFields = com.google.protobuf.UnknownFieldSet.getDefaultInstance(); }
+
+        private static final MessageKey defaultInstance;
+        public static MessageKey getDefaultInstance() {
+          return defaultInstance;
+        }
+
+        public MessageKey getDefaultInstanceForType() {
+          return defaultInstance;
+        }
+
+        private final com.google.protobuf.UnknownFieldSet unknownFields;
+        @java.lang.Override
+        public final com.google.protobuf.UnknownFieldSet
+            getUnknownFields() {
+          return this.unknownFields;
+        }
+        private MessageKey(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          initFields();
+          int mutable_bitField0_ = 0;
+          com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+              com.google.protobuf.UnknownFieldSet.newBuilder();
+          try {
+            boolean done = false;
+            while (!done) {
+              int tag = input.readTag();
+              switch (tag) {
+                case 0:
+                  done = true;
+                  break;
+                default: {
+                  if (!parseUnknownField(input, unknownFields,
+                                         extensionRegistry, tag)) {
+                    done = true;
+                  }
+                  break;
+                }
+                case 8: {
+                  bitField0_ |= 0x00000001;
+                  index_ = input.readUInt32();
+                  break;
+                }
+                case 18: {
+                  bitField0_ |= 0x00000002;
+                  cipherKey_ = input.readBytes();
+                  break;
+                }
+                case 26: {
+                  bitField0_ |= 0x00000004;
+                  macKey_ = input.readBytes();
+                  break;
+                }
+                case 34: {
+                  bitField0_ |= 0x00000008;
+                  iv_ = input.readBytes();
+                  break;
+                }
+              }
+            }
+          } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+            throw e.setUnfinishedMessage(this);
+          } catch (java.io.IOException e) {
+            throw new com.google.protobuf.InvalidProtocolBufferException(
+                e.getMessage()).setUnfinishedMessage(this);
+          } finally {
+            this.unknownFields = unknownFields.build();
+            makeExtensionsImmutable();
+          }
+        }
+        public static final com.google.protobuf.Descriptors.Descriptor
+            getDescriptor() {
+          return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SessionStructure_Chain_MessageKey_descriptor;
+        }
+
+        protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+            internalGetFieldAccessorTable() {
+          return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SessionStructure_Chain_MessageKey_fieldAccessorTable
+              .ensureFieldAccessorsInitialized(
+                  org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey.class, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey.Builder.class);
+        }
+
+        public static com.google.protobuf.Parser<MessageKey> PARSER =
+            new com.google.protobuf.AbstractParser<MessageKey>() {
+          public MessageKey parsePartialFrom(
+              com.google.protobuf.CodedInputStream input,
+              com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+              throws com.google.protobuf.InvalidProtocolBufferException {
+            return new MessageKey(input, extensionRegistry);
+          }
+        };
+
+        @java.lang.Override
+        public com.google.protobuf.Parser<MessageKey> getParserForType() {
+          return PARSER;
+        }
+
+        private int bitField0_;
+        // optional uint32 index = 1;
+        public static final int INDEX_FIELD_NUMBER = 1;
+        private int index_;
+        /**
+         * <code>optional uint32 index = 1;</code>
+         */
+        public boolean hasIndex() {
+          return ((bitField0_ & 0x00000001) == 0x00000001);
+        }
+        /**
+         * <code>optional uint32 index = 1;</code>
+         */
+        public int getIndex() {
+          return index_;
+        }
+
+        // optional bytes cipherKey = 2;
+        public static final int CIPHERKEY_FIELD_NUMBER = 2;
+        private com.google.protobuf.ByteString cipherKey_;
+        /**
+         * <code>optional bytes cipherKey = 2;</code>
+         */
+        public boolean hasCipherKey() {
+          return ((bitField0_ & 0x00000002) == 0x00000002);
+        }
+        /**
+         * <code>optional bytes cipherKey = 2;</code>
+         */
+        public com.google.protobuf.ByteString getCipherKey() {
+          return cipherKey_;
+        }
+
+        // optional bytes macKey = 3;
+        public static final int MACKEY_FIELD_NUMBER = 3;
+        private com.google.protobuf.ByteString macKey_;
+        /**
+         * <code>optional bytes macKey = 3;</code>
+         */
+        public boolean hasMacKey() {
+          return ((bitField0_ & 0x00000004) == 0x00000004);
+        }
+        /**
+         * <code>optional bytes macKey = 3;</code>
+         */
+        public com.google.protobuf.ByteString getMacKey() {
+          return macKey_;
+        }
+
+        // optional bytes iv = 4;
+        public static final int IV_FIELD_NUMBER = 4;
+        private com.google.protobuf.ByteString iv_;
+        /**
+         * <code>optional bytes iv = 4;</code>
+         */
+        public boolean hasIv() {
+          return ((bitField0_ & 0x00000008) == 0x00000008);
+        }
+        /**
+         * <code>optional bytes iv = 4;</code>
+         */
+        public com.google.protobuf.ByteString getIv() {
+          return iv_;
+        }
+
+        private void initFields() {
+          index_ = 0;
+          cipherKey_ = com.google.protobuf.ByteString.EMPTY;
+          macKey_ = com.google.protobuf.ByteString.EMPTY;
+          iv_ = com.google.protobuf.ByteString.EMPTY;
+        }
+        private byte memoizedIsInitialized = -1;
+        public final boolean isInitialized() {
+          byte isInitialized = memoizedIsInitialized;
+          if (isInitialized != -1) return isInitialized == 1;
+
+          memoizedIsInitialized = 1;
+          return true;
+        }
+
+        public void writeTo(com.google.protobuf.CodedOutputStream output)
+                            throws java.io.IOException {
+          getSerializedSize();
+          if (((bitField0_ & 0x00000001) == 0x00000001)) {
+            output.writeUInt32(1, index_);
+          }
+          if (((bitField0_ & 0x00000002) == 0x00000002)) {
+            output.writeBytes(2, cipherKey_);
+          }
+          if (((bitField0_ & 0x00000004) == 0x00000004)) {
+            output.writeBytes(3, macKey_);
+          }
+          if (((bitField0_ & 0x00000008) == 0x00000008)) {
+            output.writeBytes(4, iv_);
+          }
+          getUnknownFields().writeTo(output);
+        }
+
+        private int memoizedSerializedSize = -1;
+        public int getSerializedSize() {
+          int size = memoizedSerializedSize;
+          if (size != -1) return size;
+
+          size = 0;
+          if (((bitField0_ & 0x00000001) == 0x00000001)) {
+            size += com.google.protobuf.CodedOutputStream
+              .computeUInt32Size(1, index_);
+          }
+          if (((bitField0_ & 0x00000002) == 0x00000002)) {
+            size += com.google.protobuf.CodedOutputStream
+              .computeBytesSize(2, cipherKey_);
+          }
+          if (((bitField0_ & 0x00000004) == 0x00000004)) {
+            size += com.google.protobuf.CodedOutputStream
+              .computeBytesSize(3, macKey_);
+          }
+          if (((bitField0_ & 0x00000008) == 0x00000008)) {
+            size += com.google.protobuf.CodedOutputStream
+              .computeBytesSize(4, iv_);
+          }
+          size += getUnknownFields().getSerializedSize();
+          memoizedSerializedSize = size;
+          return size;
+        }
+
+        private static final long serialVersionUID = 0L;
+        @java.lang.Override
+        protected java.lang.Object writeReplace()
+            throws java.io.ObjectStreamException {
+          return super.writeReplace();
+        }
+
+        public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey parseFrom(
+            com.google.protobuf.ByteString data)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return PARSER.parseFrom(data);
+        }
+        public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey parseFrom(
+            com.google.protobuf.ByteString data,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return PARSER.parseFrom(data, extensionRegistry);
+        }
+        public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey parseFrom(byte[] data)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return PARSER.parseFrom(data);
+        }
+        public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey parseFrom(
+            byte[] data,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return PARSER.parseFrom(data, extensionRegistry);
+        }
+        public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey parseFrom(java.io.InputStream input)
+            throws java.io.IOException {
+          return PARSER.parseFrom(input);
+        }
+        public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey parseFrom(
+            java.io.InputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws java.io.IOException {
+          return PARSER.parseFrom(input, extensionRegistry);
+        }
+        public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey parseDelimitedFrom(java.io.InputStream input)
+            throws java.io.IOException {
+          return PARSER.parseDelimitedFrom(input);
+        }
+        public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey parseDelimitedFrom(
+            java.io.InputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws java.io.IOException {
+          return PARSER.parseDelimitedFrom(input, extensionRegistry);
+        }
+        public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey parseFrom(
+            com.google.protobuf.CodedInputStream input)
+            throws java.io.IOException {
+          return PARSER.parseFrom(input);
+        }
+        public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey parseFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws java.io.IOException {
+          return PARSER.parseFrom(input, extensionRegistry);
+        }
+
+        public static Builder newBuilder() { return Builder.create(); }
+        public Builder newBuilderForType() { return newBuilder(); }
+        public static Builder newBuilder(org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey prototype) {
+          return newBuilder().mergeFrom(prototype);
+        }
+        public Builder toBuilder() { return newBuilder(this); }
+
+        @java.lang.Override
+        protected Builder newBuilderForType(
+            com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+          Builder builder = new Builder(parent);
+          return builder;
+        }
+        /**
+         * Protobuf type {@code textsecure.SessionStructure.Chain.MessageKey}
+         */
+        public static final class Builder extends
+            com.google.protobuf.GeneratedMessage.Builder<Builder>
+           implements org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKeyOrBuilder {
+          public static final com.google.protobuf.Descriptors.Descriptor
+              getDescriptor() {
+            return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SessionStructure_Chain_MessageKey_descriptor;
+          }
+
+          protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+              internalGetFieldAccessorTable() {
+            return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SessionStructure_Chain_MessageKey_fieldAccessorTable
+                .ensureFieldAccessorsInitialized(
+                    org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey.class, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey.Builder.class);
+          }
+
+          // Construct using org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey.newBuilder()
+          private Builder() {
+            maybeForceBuilderInitialization();
+          }
+
+          private Builder(
+              com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+            super(parent);
+            maybeForceBuilderInitialization();
+          }
+          private void maybeForceBuilderInitialization() {
+            if (com.google.protobuf.GeneratedMessage.alwaysUseFieldBuilders) {
+            }
+          }
+          private static Builder create() {
+            return new Builder();
+          }
+
+          public Builder clear() {
+            super.clear();
+            index_ = 0;
+            bitField0_ = (bitField0_ & ~0x00000001);
+            cipherKey_ = com.google.protobuf.ByteString.EMPTY;
+            bitField0_ = (bitField0_ & ~0x00000002);
+            macKey_ = com.google.protobuf.ByteString.EMPTY;
+            bitField0_ = (bitField0_ & ~0x00000004);
+            iv_ = com.google.protobuf.ByteString.EMPTY;
+            bitField0_ = (bitField0_ & ~0x00000008);
+            return this;
+          }
+
+          public Builder clone() {
+            return create().mergeFrom(buildPartial());
+          }
+
+          public com.google.protobuf.Descriptors.Descriptor
+              getDescriptorForType() {
+            return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SessionStructure_Chain_MessageKey_descriptor;
+          }
+
+          public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey getDefaultInstanceForType() {
+            return org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey.getDefaultInstance();
+          }
+
+          public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey build() {
+            org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey result = buildPartial();
+            if (!result.isInitialized()) {
+              throw newUninitializedMessageException(result);
+            }
+            return result;
+          }
+
+          public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey buildPartial() {
+            org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey result = new org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey(this);
+            int from_bitField0_ = bitField0_;
+            int to_bitField0_ = 0;
+            if (((from_bitField0_ & 0x00000001) == 0x00000001)) {
+              to_bitField0_ |= 0x00000001;
+            }
+            result.index_ = index_;
+            if (((from_bitField0_ & 0x00000002) == 0x00000002)) {
+              to_bitField0_ |= 0x00000002;
+            }
+            result.cipherKey_ = cipherKey_;
+            if (((from_bitField0_ & 0x00000004) == 0x00000004)) {
+              to_bitField0_ |= 0x00000004;
+            }
+            result.macKey_ = macKey_;
+            if (((from_bitField0_ & 0x00000008) == 0x00000008)) {
+              to_bitField0_ |= 0x00000008;
+            }
+            result.iv_ = iv_;
+            result.bitField0_ = to_bitField0_;
+            onBuilt();
+            return result;
+          }
+
+          public Builder mergeFrom(com.google.protobuf.Message other) {
+            if (other instanceof org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey) {
+              return mergeFrom((org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey)other);
+            } else {
+              super.mergeFrom(other);
+              return this;
+            }
+          }
+
+          public Builder mergeFrom(org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey other) {
+            if (other == org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey.getDefaultInstance()) return this;
+            if (other.hasIndex()) {
+              setIndex(other.getIndex());
+            }
+            if (other.hasCipherKey()) {
+              setCipherKey(other.getCipherKey());
+            }
+            if (other.hasMacKey()) {
+              setMacKey(other.getMacKey());
+            }
+            if (other.hasIv()) {
+              setIv(other.getIv());
+            }
+            this.mergeUnknownFields(other.getUnknownFields());
+            return this;
+          }
+
+          public final boolean isInitialized() {
+            return true;
+          }
+
+          public Builder mergeFrom(
+              com.google.protobuf.CodedInputStream input,
+              com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+              throws java.io.IOException {
+            org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey parsedMessage = null;
+            try {
+              parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+            } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+              parsedMessage = (org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey) e.getUnfinishedMessage();
+              throw e;
+            } finally {
+              if (parsedMessage != null) {
+                mergeFrom(parsedMessage);
+              }
+            }
+            return this;
+          }
+          private int bitField0_;
+
+          // optional uint32 index = 1;
+          private int index_ ;
+          /**
+           * <code>optional uint32 index = 1;</code>
+           */
+          public boolean hasIndex() {
+            return ((bitField0_ & 0x00000001) == 0x00000001);
+          }
+          /**
+           * <code>optional uint32 index = 1;</code>
+           */
+          public int getIndex() {
+            return index_;
+          }
+          /**
+           * <code>optional uint32 index = 1;</code>
+           */
+          public Builder setIndex(int value) {
+            bitField0_ |= 0x00000001;
+            index_ = value;
+            onChanged();
+            return this;
+          }
+          /**
+           * <code>optional uint32 index = 1;</code>
+           */
+          public Builder clearIndex() {
+            bitField0_ = (bitField0_ & ~0x00000001);
+            index_ = 0;
+            onChanged();
+            return this;
+          }
+
+          // optional bytes cipherKey = 2;
+          private com.google.protobuf.ByteString cipherKey_ = com.google.protobuf.ByteString.EMPTY;
+          /**
+           * <code>optional bytes cipherKey = 2;</code>
+           */
+          public boolean hasCipherKey() {
+            return ((bitField0_ & 0x00000002) == 0x00000002);
+          }
+          /**
+           * <code>optional bytes cipherKey = 2;</code>
+           */
+          public com.google.protobuf.ByteString getCipherKey() {
+            return cipherKey_;
+          }
+          /**
+           * <code>optional bytes cipherKey = 2;</code>
+           */
+          public Builder setCipherKey(com.google.protobuf.ByteString value) {
+            if (value == null) {
+    throw new NullPointerException();
+  }
+  bitField0_ |= 0x00000002;
+            cipherKey_ = value;
+            onChanged();
+            return this;
+          }
+          /**
+           * <code>optional bytes cipherKey = 2;</code>
+           */
+          public Builder clearCipherKey() {
+            bitField0_ = (bitField0_ & ~0x00000002);
+            cipherKey_ = getDefaultInstance().getCipherKey();
+            onChanged();
+            return this;
+          }
+
+          // optional bytes macKey = 3;
+          private com.google.protobuf.ByteString macKey_ = com.google.protobuf.ByteString.EMPTY;
+          /**
+           * <code>optional bytes macKey = 3;</code>
+           */
+          public boolean hasMacKey() {
+            return ((bitField0_ & 0x00000004) == 0x00000004);
+          }
+          /**
+           * <code>optional bytes macKey = 3;</code>
+           */
+          public com.google.protobuf.ByteString getMacKey() {
+            return macKey_;
+          }
+          /**
+           * <code>optional bytes macKey = 3;</code>
+           */
+          public Builder setMacKey(com.google.protobuf.ByteString value) {
+            if (value == null) {
+    throw new NullPointerException();
+  }
+  bitField0_ |= 0x00000004;
+            macKey_ = value;
+            onChanged();
+            return this;
+          }
+          /**
+           * <code>optional bytes macKey = 3;</code>
+           */
+          public Builder clearMacKey() {
+            bitField0_ = (bitField0_ & ~0x00000004);
+            macKey_ = getDefaultInstance().getMacKey();
+            onChanged();
+            return this;
+          }
+
+          // optional bytes iv = 4;
+          private com.google.protobuf.ByteString iv_ = com.google.protobuf.ByteString.EMPTY;
+          /**
+           * <code>optional bytes iv = 4;</code>
+           */
+          public boolean hasIv() {
+            return ((bitField0_ & 0x00000008) == 0x00000008);
+          }
+          /**
+           * <code>optional bytes iv = 4;</code>
+           */
+          public com.google.protobuf.ByteString getIv() {
+            return iv_;
+          }
+          /**
+           * <code>optional bytes iv = 4;</code>
+           */
+          public Builder setIv(com.google.protobuf.ByteString value) {
+            if (value == null) {
+    throw new NullPointerException();
+  }
+  bitField0_ |= 0x00000008;
+            iv_ = value;
+            onChanged();
+            return this;
+          }
+          /**
+           * <code>optional bytes iv = 4;</code>
+           */
+          public Builder clearIv() {
+            bitField0_ = (bitField0_ & ~0x00000008);
+            iv_ = getDefaultInstance().getIv();
+            onChanged();
+            return this;
+          }
+
+          // @@protoc_insertion_point(builder_scope:textsecure.SessionStructure.Chain.MessageKey)
+        }
+
+        static {
+          defaultInstance = new MessageKey(true);
+          defaultInstance.initFields();
+        }
+
+        // @@protoc_insertion_point(class_scope:textsecure.SessionStructure.Chain.MessageKey)
+      }
+
+      private int bitField0_;
+      // optional bytes senderRatchetKey = 1;
+      public static final int SENDERRATCHETKEY_FIELD_NUMBER = 1;
+      private com.google.protobuf.ByteString senderRatchetKey_;
+      /**
+       * <code>optional bytes senderRatchetKey = 1;</code>
+       */
+      public boolean hasSenderRatchetKey() {
+        return ((bitField0_ & 0x00000001) == 0x00000001);
+      }
+      /**
+       * <code>optional bytes senderRatchetKey = 1;</code>
+       */
+      public com.google.protobuf.ByteString getSenderRatchetKey() {
+        return senderRatchetKey_;
+      }
+
+      // optional bytes senderRatchetKeyPrivate = 2;
+      public static final int SENDERRATCHETKEYPRIVATE_FIELD_NUMBER = 2;
+      private com.google.protobuf.ByteString senderRatchetKeyPrivate_;
+      /**
+       * <code>optional bytes senderRatchetKeyPrivate = 2;</code>
+       */
+      public boolean hasSenderRatchetKeyPrivate() {
+        return ((bitField0_ & 0x00000002) == 0x00000002);
+      }
+      /**
+       * <code>optional bytes senderRatchetKeyPrivate = 2;</code>
+       */
+      public com.google.protobuf.ByteString getSenderRatchetKeyPrivate() {
+        return senderRatchetKeyPrivate_;
+      }
+
+      // optional .textsecure.SessionStructure.Chain.ChainKey chainKey = 3;
+      public static final int CHAINKEY_FIELD_NUMBER = 3;
+      private org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey chainKey_;
+      /**
+       * <code>optional .textsecure.SessionStructure.Chain.ChainKey chainKey = 3;</code>
+       */
+      public boolean hasChainKey() {
+        return ((bitField0_ & 0x00000004) == 0x00000004);
+      }
+      /**
+       * <code>optional .textsecure.SessionStructure.Chain.ChainKey chainKey = 3;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey getChainKey() {
+        return chainKey_;
+      }
+      /**
+       * <code>optional .textsecure.SessionStructure.Chain.ChainKey chainKey = 3;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKeyOrBuilder getChainKeyOrBuilder() {
+        return chainKey_;
+      }
+
+      // repeated .textsecure.SessionStructure.Chain.MessageKey messageKeys = 4;
+      public static final int MESSAGEKEYS_FIELD_NUMBER = 4;
+      private java.util.List<org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey> messageKeys_;
+      /**
+       * <code>repeated .textsecure.SessionStructure.Chain.MessageKey messageKeys = 4;</code>
+       */
+      public java.util.List<org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey> getMessageKeysList() {
+        return messageKeys_;
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure.Chain.MessageKey messageKeys = 4;</code>
+       */
+      public java.util.List<? extends org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKeyOrBuilder> 
+          getMessageKeysOrBuilderList() {
+        return messageKeys_;
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure.Chain.MessageKey messageKeys = 4;</code>
+       */
+      public int getMessageKeysCount() {
+        return messageKeys_.size();
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure.Chain.MessageKey messageKeys = 4;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey getMessageKeys(int index) {
+        return messageKeys_.get(index);
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure.Chain.MessageKey messageKeys = 4;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKeyOrBuilder getMessageKeysOrBuilder(
+          int index) {
+        return messageKeys_.get(index);
+      }
+
+      private void initFields() {
+        senderRatchetKey_ = com.google.protobuf.ByteString.EMPTY;
+        senderRatchetKeyPrivate_ = com.google.protobuf.ByteString.EMPTY;
+        chainKey_ = org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey.getDefaultInstance();
+        messageKeys_ = java.util.Collections.emptyList();
+      }
+      private byte memoizedIsInitialized = -1;
+      public final boolean isInitialized() {
+        byte isInitialized = memoizedIsInitialized;
+        if (isInitialized != -1) return isInitialized == 1;
+
+        memoizedIsInitialized = 1;
+        return true;
+      }
+
+      public void writeTo(com.google.protobuf.CodedOutputStream output)
+                          throws java.io.IOException {
+        getSerializedSize();
+        if (((bitField0_ & 0x00000001) == 0x00000001)) {
+          output.writeBytes(1, senderRatchetKey_);
+        }
+        if (((bitField0_ & 0x00000002) == 0x00000002)) {
+          output.writeBytes(2, senderRatchetKeyPrivate_);
+        }
+        if (((bitField0_ & 0x00000004) == 0x00000004)) {
+          output.writeMessage(3, chainKey_);
+        }
+        for (int i = 0; i < messageKeys_.size(); i++) {
+          output.writeMessage(4, messageKeys_.get(i));
+        }
+        getUnknownFields().writeTo(output);
+      }
+
+      private int memoizedSerializedSize = -1;
+      public int getSerializedSize() {
+        int size = memoizedSerializedSize;
+        if (size != -1) return size;
+
+        size = 0;
+        if (((bitField0_ & 0x00000001) == 0x00000001)) {
+          size += com.google.protobuf.CodedOutputStream
+            .computeBytesSize(1, senderRatchetKey_);
+        }
+        if (((bitField0_ & 0x00000002) == 0x00000002)) {
+          size += com.google.protobuf.CodedOutputStream
+            .computeBytesSize(2, senderRatchetKeyPrivate_);
+        }
+        if (((bitField0_ & 0x00000004) == 0x00000004)) {
+          size += com.google.protobuf.CodedOutputStream
+            .computeMessageSize(3, chainKey_);
+        }
+        for (int i = 0; i < messageKeys_.size(); i++) {
+          size += com.google.protobuf.CodedOutputStream
+            .computeMessageSize(4, messageKeys_.get(i));
+        }
+        size += getUnknownFields().getSerializedSize();
+        memoizedSerializedSize = size;
+        return size;
+      }
+
+      private static final long serialVersionUID = 0L;
+      @java.lang.Override
+      protected java.lang.Object writeReplace()
+          throws java.io.ObjectStreamException {
+        return super.writeReplace();
+      }
+
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain parseFrom(
+          com.google.protobuf.ByteString data)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain parseFrom(
+          com.google.protobuf.ByteString data,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data, extensionRegistry);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain parseFrom(byte[] data)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain parseFrom(
+          byte[] data,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data, extensionRegistry);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain parseFrom(java.io.InputStream input)
+          throws java.io.IOException {
+        return PARSER.parseFrom(input);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain parseFrom(
+          java.io.InputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        return PARSER.parseFrom(input, extensionRegistry);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain parseDelimitedFrom(java.io.InputStream input)
+          throws java.io.IOException {
+        return PARSER.parseDelimitedFrom(input);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain parseDelimitedFrom(
+          java.io.InputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        return PARSER.parseDelimitedFrom(input, extensionRegistry);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain parseFrom(
+          com.google.protobuf.CodedInputStream input)
+          throws java.io.IOException {
+        return PARSER.parseFrom(input);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain parseFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        return PARSER.parseFrom(input, extensionRegistry);
+      }
+
+      public static Builder newBuilder() { return Builder.create(); }
+      public Builder newBuilderForType() { return newBuilder(); }
+      public static Builder newBuilder(org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain prototype) {
+        return newBuilder().mergeFrom(prototype);
+      }
+      public Builder toBuilder() { return newBuilder(this); }
+
+      @java.lang.Override
+      protected Builder newBuilderForType(
+          com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+        Builder builder = new Builder(parent);
+        return builder;
+      }
+      /**
+       * Protobuf type {@code textsecure.SessionStructure.Chain}
+       */
+      public static final class Builder extends
+          com.google.protobuf.GeneratedMessage.Builder<Builder>
+         implements org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.ChainOrBuilder {
+        public static final com.google.protobuf.Descriptors.Descriptor
+            getDescriptor() {
+          return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SessionStructure_Chain_descriptor;
+        }
+
+        protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+            internalGetFieldAccessorTable() {
+          return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SessionStructure_Chain_fieldAccessorTable
+              .ensureFieldAccessorsInitialized(
+                  org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.class, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.Builder.class);
+        }
+
+        // Construct using org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.newBuilder()
+        private Builder() {
+          maybeForceBuilderInitialization();
+        }
+
+        private Builder(
+            com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+          super(parent);
+          maybeForceBuilderInitialization();
+        }
+        private void maybeForceBuilderInitialization() {
+          if (com.google.protobuf.GeneratedMessage.alwaysUseFieldBuilders) {
+            getChainKeyFieldBuilder();
+            getMessageKeysFieldBuilder();
+          }
+        }
+        private static Builder create() {
+          return new Builder();
+        }
+
+        public Builder clear() {
+          super.clear();
+          senderRatchetKey_ = com.google.protobuf.ByteString.EMPTY;
+          bitField0_ = (bitField0_ & ~0x00000001);
+          senderRatchetKeyPrivate_ = com.google.protobuf.ByteString.EMPTY;
+          bitField0_ = (bitField0_ & ~0x00000002);
+          if (chainKeyBuilder_ == null) {
+            chainKey_ = org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey.getDefaultInstance();
+          } else {
+            chainKeyBuilder_.clear();
+          }
+          bitField0_ = (bitField0_ & ~0x00000004);
+          if (messageKeysBuilder_ == null) {
+            messageKeys_ = java.util.Collections.emptyList();
+            bitField0_ = (bitField0_ & ~0x00000008);
+          } else {
+            messageKeysBuilder_.clear();
+          }
+          return this;
+        }
+
+        public Builder clone() {
+          return create().mergeFrom(buildPartial());
+        }
+
+        public com.google.protobuf.Descriptors.Descriptor
+            getDescriptorForType() {
+          return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SessionStructure_Chain_descriptor;
+        }
+
+        public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain getDefaultInstanceForType() {
+          return org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.getDefaultInstance();
+        }
+
+        public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain build() {
+          org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain result = buildPartial();
+          if (!result.isInitialized()) {
+            throw newUninitializedMessageException(result);
+          }
+          return result;
+        }
+
+        public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain buildPartial() {
+          org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain result = new org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain(this);
+          int from_bitField0_ = bitField0_;
+          int to_bitField0_ = 0;
+          if (((from_bitField0_ & 0x00000001) == 0x00000001)) {
+            to_bitField0_ |= 0x00000001;
+          }
+          result.senderRatchetKey_ = senderRatchetKey_;
+          if (((from_bitField0_ & 0x00000002) == 0x00000002)) {
+            to_bitField0_ |= 0x00000002;
+          }
+          result.senderRatchetKeyPrivate_ = senderRatchetKeyPrivate_;
+          if (((from_bitField0_ & 0x00000004) == 0x00000004)) {
+            to_bitField0_ |= 0x00000004;
+          }
+          if (chainKeyBuilder_ == null) {
+            result.chainKey_ = chainKey_;
+          } else {
+            result.chainKey_ = chainKeyBuilder_.build();
+          }
+          if (messageKeysBuilder_ == null) {
+            if (((bitField0_ & 0x00000008) == 0x00000008)) {
+              messageKeys_ = java.util.Collections.unmodifiableList(messageKeys_);
+              bitField0_ = (bitField0_ & ~0x00000008);
+            }
+            result.messageKeys_ = messageKeys_;
+          } else {
+            result.messageKeys_ = messageKeysBuilder_.build();
+          }
+          result.bitField0_ = to_bitField0_;
+          onBuilt();
+          return result;
+        }
+
+        public Builder mergeFrom(com.google.protobuf.Message other) {
+          if (other instanceof org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain) {
+            return mergeFrom((org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain)other);
+          } else {
+            super.mergeFrom(other);
+            return this;
+          }
+        }
+
+        public Builder mergeFrom(org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain other) {
+          if (other == org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.getDefaultInstance()) return this;
+          if (other.hasSenderRatchetKey()) {
+            setSenderRatchetKey(other.getSenderRatchetKey());
+          }
+          if (other.hasSenderRatchetKeyPrivate()) {
+            setSenderRatchetKeyPrivate(other.getSenderRatchetKeyPrivate());
+          }
+          if (other.hasChainKey()) {
+            mergeChainKey(other.getChainKey());
+          }
+          if (messageKeysBuilder_ == null) {
+            if (!other.messageKeys_.isEmpty()) {
+              if (messageKeys_.isEmpty()) {
+                messageKeys_ = other.messageKeys_;
+                bitField0_ = (bitField0_ & ~0x00000008);
+              } else {
+                ensureMessageKeysIsMutable();
+                messageKeys_.addAll(other.messageKeys_);
+              }
+              onChanged();
+            }
+          } else {
+            if (!other.messageKeys_.isEmpty()) {
+              if (messageKeysBuilder_.isEmpty()) {
+                messageKeysBuilder_.dispose();
+                messageKeysBuilder_ = null;
+                messageKeys_ = other.messageKeys_;
+                bitField0_ = (bitField0_ & ~0x00000008);
+                messageKeysBuilder_ = 
+                  com.google.protobuf.GeneratedMessage.alwaysUseFieldBuilders ?
+                     getMessageKeysFieldBuilder() : null;
+              } else {
+                messageKeysBuilder_.addAllMessages(other.messageKeys_);
+              }
+            }
+          }
+          this.mergeUnknownFields(other.getUnknownFields());
+          return this;
+        }
+
+        public final boolean isInitialized() {
+          return true;
+        }
+
+        public Builder mergeFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws java.io.IOException {
+          org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain parsedMessage = null;
+          try {
+            parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+          } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+            parsedMessage = (org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain) e.getUnfinishedMessage();
+            throw e;
+          } finally {
+            if (parsedMessage != null) {
+              mergeFrom(parsedMessage);
+            }
+          }
+          return this;
+        }
+        private int bitField0_;
+
+        // optional bytes senderRatchetKey = 1;
+        private com.google.protobuf.ByteString senderRatchetKey_ = com.google.protobuf.ByteString.EMPTY;
+        /**
+         * <code>optional bytes senderRatchetKey = 1;</code>
+         */
+        public boolean hasSenderRatchetKey() {
+          return ((bitField0_ & 0x00000001) == 0x00000001);
+        }
+        /**
+         * <code>optional bytes senderRatchetKey = 1;</code>
+         */
+        public com.google.protobuf.ByteString getSenderRatchetKey() {
+          return senderRatchetKey_;
+        }
+        /**
+         * <code>optional bytes senderRatchetKey = 1;</code>
+         */
+        public Builder setSenderRatchetKey(com.google.protobuf.ByteString value) {
+          if (value == null) {
+    throw new NullPointerException();
+  }
+  bitField0_ |= 0x00000001;
+          senderRatchetKey_ = value;
+          onChanged();
+          return this;
+        }
+        /**
+         * <code>optional bytes senderRatchetKey = 1;</code>
+         */
+        public Builder clearSenderRatchetKey() {
+          bitField0_ = (bitField0_ & ~0x00000001);
+          senderRatchetKey_ = getDefaultInstance().getSenderRatchetKey();
+          onChanged();
+          return this;
+        }
+
+        // optional bytes senderRatchetKeyPrivate = 2;
+        private com.google.protobuf.ByteString senderRatchetKeyPrivate_ = com.google.protobuf.ByteString.EMPTY;
+        /**
+         * <code>optional bytes senderRatchetKeyPrivate = 2;</code>
+         */
+        public boolean hasSenderRatchetKeyPrivate() {
+          return ((bitField0_ & 0x00000002) == 0x00000002);
+        }
+        /**
+         * <code>optional bytes senderRatchetKeyPrivate = 2;</code>
+         */
+        public com.google.protobuf.ByteString getSenderRatchetKeyPrivate() {
+          return senderRatchetKeyPrivate_;
+        }
+        /**
+         * <code>optional bytes senderRatchetKeyPrivate = 2;</code>
+         */
+        public Builder setSenderRatchetKeyPrivate(com.google.protobuf.ByteString value) {
+          if (value == null) {
+    throw new NullPointerException();
+  }
+  bitField0_ |= 0x00000002;
+          senderRatchetKeyPrivate_ = value;
+          onChanged();
+          return this;
+        }
+        /**
+         * <code>optional bytes senderRatchetKeyPrivate = 2;</code>
+         */
+        public Builder clearSenderRatchetKeyPrivate() {
+          bitField0_ = (bitField0_ & ~0x00000002);
+          senderRatchetKeyPrivate_ = getDefaultInstance().getSenderRatchetKeyPrivate();
+          onChanged();
+          return this;
+        }
+
+        // optional .textsecure.SessionStructure.Chain.ChainKey chainKey = 3;
+        private org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey chainKey_ = org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey.getDefaultInstance();
+        private com.google.protobuf.SingleFieldBuilder<
+            org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKeyOrBuilder> chainKeyBuilder_;
+        /**
+         * <code>optional .textsecure.SessionStructure.Chain.ChainKey chainKey = 3;</code>
+         */
+        public boolean hasChainKey() {
+          return ((bitField0_ & 0x00000004) == 0x00000004);
+        }
+        /**
+         * <code>optional .textsecure.SessionStructure.Chain.ChainKey chainKey = 3;</code>
+         */
+        public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey getChainKey() {
+          if (chainKeyBuilder_ == null) {
+            return chainKey_;
+          } else {
+            return chainKeyBuilder_.getMessage();
+          }
+        }
+        /**
+         * <code>optional .textsecure.SessionStructure.Chain.ChainKey chainKey = 3;</code>
+         */
+        public Builder setChainKey(org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey value) {
+          if (chainKeyBuilder_ == null) {
+            if (value == null) {
+              throw new NullPointerException();
+            }
+            chainKey_ = value;
+            onChanged();
+          } else {
+            chainKeyBuilder_.setMessage(value);
+          }
+          bitField0_ |= 0x00000004;
+          return this;
+        }
+        /**
+         * <code>optional .textsecure.SessionStructure.Chain.ChainKey chainKey = 3;</code>
+         */
+        public Builder setChainKey(
+            org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey.Builder builderForValue) {
+          if (chainKeyBuilder_ == null) {
+            chainKey_ = builderForValue.build();
+            onChanged();
+          } else {
+            chainKeyBuilder_.setMessage(builderForValue.build());
+          }
+          bitField0_ |= 0x00000004;
+          return this;
+        }
+        /**
+         * <code>optional .textsecure.SessionStructure.Chain.ChainKey chainKey = 3;</code>
+         */
+        public Builder mergeChainKey(org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey value) {
+          if (chainKeyBuilder_ == null) {
+            if (((bitField0_ & 0x00000004) == 0x00000004) &&
+                chainKey_ != org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey.getDefaultInstance()) {
+              chainKey_ =
+                org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey.newBuilder(chainKey_).mergeFrom(value).buildPartial();
+            } else {
+              chainKey_ = value;
+            }
+            onChanged();
+          } else {
+            chainKeyBuilder_.mergeFrom(value);
+          }
+          bitField0_ |= 0x00000004;
+          return this;
+        }
+        /**
+         * <code>optional .textsecure.SessionStructure.Chain.ChainKey chainKey = 3;</code>
+         */
+        public Builder clearChainKey() {
+          if (chainKeyBuilder_ == null) {
+            chainKey_ = org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey.getDefaultInstance();
+            onChanged();
+          } else {
+            chainKeyBuilder_.clear();
+          }
+          bitField0_ = (bitField0_ & ~0x00000004);
+          return this;
+        }
+        /**
+         * <code>optional .textsecure.SessionStructure.Chain.ChainKey chainKey = 3;</code>
+         */
+        public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey.Builder getChainKeyBuilder() {
+          bitField0_ |= 0x00000004;
+          onChanged();
+          return getChainKeyFieldBuilder().getBuilder();
+        }
+        /**
+         * <code>optional .textsecure.SessionStructure.Chain.ChainKey chainKey = 3;</code>
+         */
+        public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKeyOrBuilder getChainKeyOrBuilder() {
+          if (chainKeyBuilder_ != null) {
+            return chainKeyBuilder_.getMessageOrBuilder();
+          } else {
+            return chainKey_;
+          }
+        }
+        /**
+         * <code>optional .textsecure.SessionStructure.Chain.ChainKey chainKey = 3;</code>
+         */
+        private com.google.protobuf.SingleFieldBuilder<
+            org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKeyOrBuilder> 
+            getChainKeyFieldBuilder() {
+          if (chainKeyBuilder_ == null) {
+            chainKeyBuilder_ = new com.google.protobuf.SingleFieldBuilder<
+                org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKey.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.ChainKeyOrBuilder>(
+                    chainKey_,
+                    getParentForChildren(),
+                    isClean());
+            chainKey_ = null;
+          }
+          return chainKeyBuilder_;
+        }
+
+        // repeated .textsecure.SessionStructure.Chain.MessageKey messageKeys = 4;
+        private java.util.List<org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey> messageKeys_ =
+          java.util.Collections.emptyList();
+        private void ensureMessageKeysIsMutable() {
+          if (!((bitField0_ & 0x00000008) == 0x00000008)) {
+            messageKeys_ = new java.util.ArrayList<org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey>(messageKeys_);
+            bitField0_ |= 0x00000008;
+           }
+        }
+
+        private com.google.protobuf.RepeatedFieldBuilder<
+            org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKeyOrBuilder> messageKeysBuilder_;
+
+        /**
+         * <code>repeated .textsecure.SessionStructure.Chain.MessageKey messageKeys = 4;</code>
+         */
+        public java.util.List<org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey> getMessageKeysList() {
+          if (messageKeysBuilder_ == null) {
+            return java.util.Collections.unmodifiableList(messageKeys_);
+          } else {
+            return messageKeysBuilder_.getMessageList();
+          }
+        }
+        /**
+         * <code>repeated .textsecure.SessionStructure.Chain.MessageKey messageKeys = 4;</code>
+         */
+        public int getMessageKeysCount() {
+          if (messageKeysBuilder_ == null) {
+            return messageKeys_.size();
+          } else {
+            return messageKeysBuilder_.getCount();
+          }
+        }
+        /**
+         * <code>repeated .textsecure.SessionStructure.Chain.MessageKey messageKeys = 4;</code>
+         */
+        public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey getMessageKeys(int index) {
+          if (messageKeysBuilder_ == null) {
+            return messageKeys_.get(index);
+          } else {
+            return messageKeysBuilder_.getMessage(index);
+          }
+        }
+        /**
+         * <code>repeated .textsecure.SessionStructure.Chain.MessageKey messageKeys = 4;</code>
+         */
+        public Builder setMessageKeys(
+            int index, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey value) {
+          if (messageKeysBuilder_ == null) {
+            if (value == null) {
+              throw new NullPointerException();
+            }
+            ensureMessageKeysIsMutable();
+            messageKeys_.set(index, value);
+            onChanged();
+          } else {
+            messageKeysBuilder_.setMessage(index, value);
+          }
+          return this;
+        }
+        /**
+         * <code>repeated .textsecure.SessionStructure.Chain.MessageKey messageKeys = 4;</code>
+         */
+        public Builder setMessageKeys(
+            int index, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey.Builder builderForValue) {
+          if (messageKeysBuilder_ == null) {
+            ensureMessageKeysIsMutable();
+            messageKeys_.set(index, builderForValue.build());
+            onChanged();
+          } else {
+            messageKeysBuilder_.setMessage(index, builderForValue.build());
+          }
+          return this;
+        }
+        /**
+         * <code>repeated .textsecure.SessionStructure.Chain.MessageKey messageKeys = 4;</code>
+         */
+        public Builder addMessageKeys(org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey value) {
+          if (messageKeysBuilder_ == null) {
+            if (value == null) {
+              throw new NullPointerException();
+            }
+            ensureMessageKeysIsMutable();
+            messageKeys_.add(value);
+            onChanged();
+          } else {
+            messageKeysBuilder_.addMessage(value);
+          }
+          return this;
+        }
+        /**
+         * <code>repeated .textsecure.SessionStructure.Chain.MessageKey messageKeys = 4;</code>
+         */
+        public Builder addMessageKeys(
+            int index, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey value) {
+          if (messageKeysBuilder_ == null) {
+            if (value == null) {
+              throw new NullPointerException();
+            }
+            ensureMessageKeysIsMutable();
+            messageKeys_.add(index, value);
+            onChanged();
+          } else {
+            messageKeysBuilder_.addMessage(index, value);
+          }
+          return this;
+        }
+        /**
+         * <code>repeated .textsecure.SessionStructure.Chain.MessageKey messageKeys = 4;</code>
+         */
+        public Builder addMessageKeys(
+            org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey.Builder builderForValue) {
+          if (messageKeysBuilder_ == null) {
+            ensureMessageKeysIsMutable();
+            messageKeys_.add(builderForValue.build());
+            onChanged();
+          } else {
+            messageKeysBuilder_.addMessage(builderForValue.build());
+          }
+          return this;
+        }
+        /**
+         * <code>repeated .textsecure.SessionStructure.Chain.MessageKey messageKeys = 4;</code>
+         */
+        public Builder addMessageKeys(
+            int index, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey.Builder builderForValue) {
+          if (messageKeysBuilder_ == null) {
+            ensureMessageKeysIsMutable();
+            messageKeys_.add(index, builderForValue.build());
+            onChanged();
+          } else {
+            messageKeysBuilder_.addMessage(index, builderForValue.build());
+          }
+          return this;
+        }
+        /**
+         * <code>repeated .textsecure.SessionStructure.Chain.MessageKey messageKeys = 4;</code>
+         */
+        public Builder addAllMessageKeys(
+            java.lang.Iterable<? extends org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey> values) {
+          if (messageKeysBuilder_ == null) {
+            ensureMessageKeysIsMutable();
+            super.addAll(values, messageKeys_);
+            onChanged();
+          } else {
+            messageKeysBuilder_.addAllMessages(values);
+          }
+          return this;
+        }
+        /**
+         * <code>repeated .textsecure.SessionStructure.Chain.MessageKey messageKeys = 4;</code>
+         */
+        public Builder clearMessageKeys() {
+          if (messageKeysBuilder_ == null) {
+            messageKeys_ = java.util.Collections.emptyList();
+            bitField0_ = (bitField0_ & ~0x00000008);
+            onChanged();
+          } else {
+            messageKeysBuilder_.clear();
+          }
+          return this;
+        }
+        /**
+         * <code>repeated .textsecure.SessionStructure.Chain.MessageKey messageKeys = 4;</code>
+         */
+        public Builder removeMessageKeys(int index) {
+          if (messageKeysBuilder_ == null) {
+            ensureMessageKeysIsMutable();
+            messageKeys_.remove(index);
+            onChanged();
+          } else {
+            messageKeysBuilder_.remove(index);
+          }
+          return this;
+        }
+        /**
+         * <code>repeated .textsecure.SessionStructure.Chain.MessageKey messageKeys = 4;</code>
+         */
+        public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey.Builder getMessageKeysBuilder(
+            int index) {
+          return getMessageKeysFieldBuilder().getBuilder(index);
+        }
+        /**
+         * <code>repeated .textsecure.SessionStructure.Chain.MessageKey messageKeys = 4;</code>
+         */
+        public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKeyOrBuilder getMessageKeysOrBuilder(
+            int index) {
+          if (messageKeysBuilder_ == null) {
+            return messageKeys_.get(index);  } else {
+            return messageKeysBuilder_.getMessageOrBuilder(index);
+          }
+        }
+        /**
+         * <code>repeated .textsecure.SessionStructure.Chain.MessageKey messageKeys = 4;</code>
+         */
+        public java.util.List<? extends org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKeyOrBuilder> 
+             getMessageKeysOrBuilderList() {
+          if (messageKeysBuilder_ != null) {
+            return messageKeysBuilder_.getMessageOrBuilderList();
+          } else {
+            return java.util.Collections.unmodifiableList(messageKeys_);
+          }
+        }
+        /**
+         * <code>repeated .textsecure.SessionStructure.Chain.MessageKey messageKeys = 4;</code>
+         */
+        public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey.Builder addMessageKeysBuilder() {
+          return getMessageKeysFieldBuilder().addBuilder(
+              org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey.getDefaultInstance());
+        }
+        /**
+         * <code>repeated .textsecure.SessionStructure.Chain.MessageKey messageKeys = 4;</code>
+         */
+        public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey.Builder addMessageKeysBuilder(
+            int index) {
+          return getMessageKeysFieldBuilder().addBuilder(
+              index, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey.getDefaultInstance());
+        }
+        /**
+         * <code>repeated .textsecure.SessionStructure.Chain.MessageKey messageKeys = 4;</code>
+         */
+        public java.util.List<org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey.Builder> 
+             getMessageKeysBuilderList() {
+          return getMessageKeysFieldBuilder().getBuilderList();
+        }
+        private com.google.protobuf.RepeatedFieldBuilder<
+            org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKeyOrBuilder> 
+            getMessageKeysFieldBuilder() {
+          if (messageKeysBuilder_ == null) {
+            messageKeysBuilder_ = new com.google.protobuf.RepeatedFieldBuilder<
+                org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKey.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.MessageKeyOrBuilder>(
+                    messageKeys_,
+                    ((bitField0_ & 0x00000008) == 0x00000008),
+                    getParentForChildren(),
+                    isClean());
+            messageKeys_ = null;
+          }
+          return messageKeysBuilder_;
+        }
+
+        // @@protoc_insertion_point(builder_scope:textsecure.SessionStructure.Chain)
+      }
+
+      static {
+        defaultInstance = new Chain(true);
+        defaultInstance.initFields();
+      }
+
+      // @@protoc_insertion_point(class_scope:textsecure.SessionStructure.Chain)
+    }
+
+    public interface PendingKeyExchangeOrBuilder
+        extends com.google.protobuf.MessageOrBuilder {
+
+      // optional uint32 sequence = 1;
+      /**
+       * <code>optional uint32 sequence = 1;</code>
+       */
+      boolean hasSequence();
+      /**
+       * <code>optional uint32 sequence = 1;</code>
+       */
+      int getSequence();
+
+      // optional bytes localBaseKey = 2;
+      /**
+       * <code>optional bytes localBaseKey = 2;</code>
+       */
+      boolean hasLocalBaseKey();
+      /**
+       * <code>optional bytes localBaseKey = 2;</code>
+       */
+      com.google.protobuf.ByteString getLocalBaseKey();
+
+      // optional bytes localBaseKeyPrivate = 3;
+      /**
+       * <code>optional bytes localBaseKeyPrivate = 3;</code>
+       */
+      boolean hasLocalBaseKeyPrivate();
+      /**
+       * <code>optional bytes localBaseKeyPrivate = 3;</code>
+       */
+      com.google.protobuf.ByteString getLocalBaseKeyPrivate();
+
+      // optional bytes localRatchetKey = 4;
+      /**
+       * <code>optional bytes localRatchetKey = 4;</code>
+       */
+      boolean hasLocalRatchetKey();
+      /**
+       * <code>optional bytes localRatchetKey = 4;</code>
+       */
+      com.google.protobuf.ByteString getLocalRatchetKey();
+
+      // optional bytes localRatchetKeyPrivate = 5;
+      /**
+       * <code>optional bytes localRatchetKeyPrivate = 5;</code>
+       */
+      boolean hasLocalRatchetKeyPrivate();
+      /**
+       * <code>optional bytes localRatchetKeyPrivate = 5;</code>
+       */
+      com.google.protobuf.ByteString getLocalRatchetKeyPrivate();
+
+      // optional bytes localIdentityKey = 7;
+      /**
+       * <code>optional bytes localIdentityKey = 7;</code>
+       */
+      boolean hasLocalIdentityKey();
+      /**
+       * <code>optional bytes localIdentityKey = 7;</code>
+       */
+      com.google.protobuf.ByteString getLocalIdentityKey();
+
+      // optional bytes localIdentityKeyPrivate = 8;
+      /**
+       * <code>optional bytes localIdentityKeyPrivate = 8;</code>
+       */
+      boolean hasLocalIdentityKeyPrivate();
+      /**
+       * <code>optional bytes localIdentityKeyPrivate = 8;</code>
+       */
+      com.google.protobuf.ByteString getLocalIdentityKeyPrivate();
+    }
+    /**
+     * Protobuf type {@code textsecure.SessionStructure.PendingKeyExchange}
+     */
+    public static final class PendingKeyExchange extends
+        com.google.protobuf.GeneratedMessage
+        implements PendingKeyExchangeOrBuilder {
+      // Use PendingKeyExchange.newBuilder() to construct.
+      private PendingKeyExchange(com.google.protobuf.GeneratedMessage.Builder<?> builder) {
+        super(builder);
+        this.unknownFields = builder.getUnknownFields();
+      }
+      private PendingKeyExchange(boolean noInit) { this.unknownFields = com.google.protobuf.UnknownFieldSet.getDefaultInstance(); }
+
+      private static final PendingKeyExchange defaultInstance;
+      public static PendingKeyExchange getDefaultInstance() {
+        return defaultInstance;
+      }
+
+      public PendingKeyExchange getDefaultInstanceForType() {
+        return defaultInstance;
+      }
+
+      private final com.google.protobuf.UnknownFieldSet unknownFields;
+      @java.lang.Override
+      public final com.google.protobuf.UnknownFieldSet
+          getUnknownFields() {
+        return this.unknownFields;
+      }
+      private PendingKeyExchange(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        initFields();
+        int mutable_bitField0_ = 0;
+        com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+            com.google.protobuf.UnknownFieldSet.newBuilder();
+        try {
+          boolean done = false;
+          while (!done) {
+            int tag = input.readTag();
+            switch (tag) {
+              case 0:
+                done = true;
+                break;
+              default: {
+                if (!parseUnknownField(input, unknownFields,
+                                       extensionRegistry, tag)) {
+                  done = true;
+                }
+                break;
+              }
+              case 8: {
+                bitField0_ |= 0x00000001;
+                sequence_ = input.readUInt32();
+                break;
+              }
+              case 18: {
+                bitField0_ |= 0x00000002;
+                localBaseKey_ = input.readBytes();
+                break;
+              }
+              case 26: {
+                bitField0_ |= 0x00000004;
+                localBaseKeyPrivate_ = input.readBytes();
+                break;
+              }
+              case 34: {
+                bitField0_ |= 0x00000008;
+                localRatchetKey_ = input.readBytes();
+                break;
+              }
+              case 42: {
+                bitField0_ |= 0x00000010;
+                localRatchetKeyPrivate_ = input.readBytes();
+                break;
+              }
+              case 58: {
+                bitField0_ |= 0x00000020;
+                localIdentityKey_ = input.readBytes();
+                break;
+              }
+              case 66: {
+                bitField0_ |= 0x00000040;
+                localIdentityKeyPrivate_ = input.readBytes();
+                break;
+              }
+            }
+          }
+        } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+          throw e.setUnfinishedMessage(this);
+        } catch (java.io.IOException e) {
+          throw new com.google.protobuf.InvalidProtocolBufferException(
+              e.getMessage()).setUnfinishedMessage(this);
+        } finally {
+          this.unknownFields = unknownFields.build();
+          makeExtensionsImmutable();
+        }
+      }
+      public static final com.google.protobuf.Descriptors.Descriptor
+          getDescriptor() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SessionStructure_PendingKeyExchange_descriptor;
+      }
+
+      protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+          internalGetFieldAccessorTable() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SessionStructure_PendingKeyExchange_fieldAccessorTable
+            .ensureFieldAccessorsInitialized(
+                org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange.class, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange.Builder.class);
+      }
+
+      public static com.google.protobuf.Parser<PendingKeyExchange> PARSER =
+          new com.google.protobuf.AbstractParser<PendingKeyExchange>() {
+        public PendingKeyExchange parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new PendingKeyExchange(input, extensionRegistry);
+        }
+      };
+
+      @java.lang.Override
+      public com.google.protobuf.Parser<PendingKeyExchange> getParserForType() {
+        return PARSER;
+      }
+
+      private int bitField0_;
+      // optional uint32 sequence = 1;
+      public static final int SEQUENCE_FIELD_NUMBER = 1;
+      private int sequence_;
+      /**
+       * <code>optional uint32 sequence = 1;</code>
+       */
+      public boolean hasSequence() {
+        return ((bitField0_ & 0x00000001) == 0x00000001);
+      }
+      /**
+       * <code>optional uint32 sequence = 1;</code>
+       */
+      public int getSequence() {
+        return sequence_;
+      }
+
+      // optional bytes localBaseKey = 2;
+      public static final int LOCALBASEKEY_FIELD_NUMBER = 2;
+      private com.google.protobuf.ByteString localBaseKey_;
+      /**
+       * <code>optional bytes localBaseKey = 2;</code>
+       */
+      public boolean hasLocalBaseKey() {
+        return ((bitField0_ & 0x00000002) == 0x00000002);
+      }
+      /**
+       * <code>optional bytes localBaseKey = 2;</code>
+       */
+      public com.google.protobuf.ByteString getLocalBaseKey() {
+        return localBaseKey_;
+      }
+
+      // optional bytes localBaseKeyPrivate = 3;
+      public static final int LOCALBASEKEYPRIVATE_FIELD_NUMBER = 3;
+      private com.google.protobuf.ByteString localBaseKeyPrivate_;
+      /**
+       * <code>optional bytes localBaseKeyPrivate = 3;</code>
+       */
+      public boolean hasLocalBaseKeyPrivate() {
+        return ((bitField0_ & 0x00000004) == 0x00000004);
+      }
+      /**
+       * <code>optional bytes localBaseKeyPrivate = 3;</code>
+       */
+      public com.google.protobuf.ByteString getLocalBaseKeyPrivate() {
+        return localBaseKeyPrivate_;
+      }
+
+      // optional bytes localRatchetKey = 4;
+      public static final int LOCALRATCHETKEY_FIELD_NUMBER = 4;
+      private com.google.protobuf.ByteString localRatchetKey_;
+      /**
+       * <code>optional bytes localRatchetKey = 4;</code>
+       */
+      public boolean hasLocalRatchetKey() {
+        return ((bitField0_ & 0x00000008) == 0x00000008);
+      }
+      /**
+       * <code>optional bytes localRatchetKey = 4;</code>
+       */
+      public com.google.protobuf.ByteString getLocalRatchetKey() {
+        return localRatchetKey_;
+      }
+
+      // optional bytes localRatchetKeyPrivate = 5;
+      public static final int LOCALRATCHETKEYPRIVATE_FIELD_NUMBER = 5;
+      private com.google.protobuf.ByteString localRatchetKeyPrivate_;
+      /**
+       * <code>optional bytes localRatchetKeyPrivate = 5;</code>
+       */
+      public boolean hasLocalRatchetKeyPrivate() {
+        return ((bitField0_ & 0x00000010) == 0x00000010);
+      }
+      /**
+       * <code>optional bytes localRatchetKeyPrivate = 5;</code>
+       */
+      public com.google.protobuf.ByteString getLocalRatchetKeyPrivate() {
+        return localRatchetKeyPrivate_;
+      }
+
+      // optional bytes localIdentityKey = 7;
+      public static final int LOCALIDENTITYKEY_FIELD_NUMBER = 7;
+      private com.google.protobuf.ByteString localIdentityKey_;
+      /**
+       * <code>optional bytes localIdentityKey = 7;</code>
+       */
+      public boolean hasLocalIdentityKey() {
+        return ((bitField0_ & 0x00000020) == 0x00000020);
+      }
+      /**
+       * <code>optional bytes localIdentityKey = 7;</code>
+       */
+      public com.google.protobuf.ByteString getLocalIdentityKey() {
+        return localIdentityKey_;
+      }
+
+      // optional bytes localIdentityKeyPrivate = 8;
+      public static final int LOCALIDENTITYKEYPRIVATE_FIELD_NUMBER = 8;
+      private com.google.protobuf.ByteString localIdentityKeyPrivate_;
+      /**
+       * <code>optional bytes localIdentityKeyPrivate = 8;</code>
+       */
+      public boolean hasLocalIdentityKeyPrivate() {
+        return ((bitField0_ & 0x00000040) == 0x00000040);
+      }
+      /**
+       * <code>optional bytes localIdentityKeyPrivate = 8;</code>
+       */
+      public com.google.protobuf.ByteString getLocalIdentityKeyPrivate() {
+        return localIdentityKeyPrivate_;
+      }
+
+      private void initFields() {
+        sequence_ = 0;
+        localBaseKey_ = com.google.protobuf.ByteString.EMPTY;
+        localBaseKeyPrivate_ = com.google.protobuf.ByteString.EMPTY;
+        localRatchetKey_ = com.google.protobuf.ByteString.EMPTY;
+        localRatchetKeyPrivate_ = com.google.protobuf.ByteString.EMPTY;
+        localIdentityKey_ = com.google.protobuf.ByteString.EMPTY;
+        localIdentityKeyPrivate_ = com.google.protobuf.ByteString.EMPTY;
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+        memoizedIsInitialized = 1;
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+      public void writeTo(com.google.protobuf.CodedOutputStream output)
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+        getSerializedSize();
+        if (((bitField0_ & 0x00000001) == 0x00000001)) {
+          output.writeUInt32(1, sequence_);
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+        if (((bitField0_ & 0x00000002) == 0x00000002)) {
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+        if (((bitField0_ & 0x00000004) == 0x00000004)) {
+          output.writeBytes(3, localBaseKeyPrivate_);
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+        if (((bitField0_ & 0x00000008) == 0x00000008)) {
+          output.writeBytes(4, localRatchetKey_);
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+        if (((bitField0_ & 0x00000010) == 0x00000010)) {
+          output.writeBytes(5, localRatchetKeyPrivate_);
+        }
+        if (((bitField0_ & 0x00000020) == 0x00000020)) {
+          output.writeBytes(7, localIdentityKey_);
+        }
+        if (((bitField0_ & 0x00000040) == 0x00000040)) {
+          output.writeBytes(8, localIdentityKeyPrivate_);
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+        getUnknownFields().writeTo(output);
+      }
+
+      private int memoizedSerializedSize = -1;
+      public int getSerializedSize() {
+        int size = memoizedSerializedSize;
+        if (size != -1) return size;
+
+        size = 0;
+        if (((bitField0_ & 0x00000001) == 0x00000001)) {
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+            .computeUInt32Size(1, sequence_);
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+        if (((bitField0_ & 0x00000002) == 0x00000002)) {
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+            .computeBytesSize(2, localBaseKey_);
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+        if (((bitField0_ & 0x00000004) == 0x00000004)) {
+          size += com.google.protobuf.CodedOutputStream
+            .computeBytesSize(3, localBaseKeyPrivate_);
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+        if (((bitField0_ & 0x00000008) == 0x00000008)) {
+          size += com.google.protobuf.CodedOutputStream
+            .computeBytesSize(4, localRatchetKey_);
+        }
+        if (((bitField0_ & 0x00000010) == 0x00000010)) {
+          size += com.google.protobuf.CodedOutputStream
+            .computeBytesSize(5, localRatchetKeyPrivate_);
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+        if (((bitField0_ & 0x00000020) == 0x00000020)) {
+          size += com.google.protobuf.CodedOutputStream
+            .computeBytesSize(7, localIdentityKey_);
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+        if (((bitField0_ & 0x00000040) == 0x00000040)) {
+          size += com.google.protobuf.CodedOutputStream
+            .computeBytesSize(8, localIdentityKeyPrivate_);
+        }
+        size += getUnknownFields().getSerializedSize();
+        memoizedSerializedSize = size;
+        return size;
+      }
+
+      private static final long serialVersionUID = 0L;
+      @java.lang.Override
+      protected java.lang.Object writeReplace()
+          throws java.io.ObjectStreamException {
+        return super.writeReplace();
+      }
+
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange parseFrom(
+          com.google.protobuf.ByteString data)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange parseFrom(
+          com.google.protobuf.ByteString data,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data, extensionRegistry);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange parseFrom(byte[] data)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange parseFrom(
+          byte[] data,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data, extensionRegistry);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange parseFrom(java.io.InputStream input)
+          throws java.io.IOException {
+        return PARSER.parseFrom(input);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange parseFrom(
+          java.io.InputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        return PARSER.parseFrom(input, extensionRegistry);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange parseDelimitedFrom(java.io.InputStream input)
+          throws java.io.IOException {
+        return PARSER.parseDelimitedFrom(input);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange parseDelimitedFrom(
+          java.io.InputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        return PARSER.parseDelimitedFrom(input, extensionRegistry);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange parseFrom(
+          com.google.protobuf.CodedInputStream input)
+          throws java.io.IOException {
+        return PARSER.parseFrom(input);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange parseFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        return PARSER.parseFrom(input, extensionRegistry);
+      }
+
+      public static Builder newBuilder() { return Builder.create(); }
+      public Builder newBuilderForType() { return newBuilder(); }
+      public static Builder newBuilder(org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange prototype) {
+        return newBuilder().mergeFrom(prototype);
+      }
+      public Builder toBuilder() { return newBuilder(this); }
+
+      @java.lang.Override
+      protected Builder newBuilderForType(
+          com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+        Builder builder = new Builder(parent);
+        return builder;
+      }
+      /**
+       * Protobuf type {@code textsecure.SessionStructure.PendingKeyExchange}
+       */
+      public static final class Builder extends
+          com.google.protobuf.GeneratedMessage.Builder<Builder>
+         implements org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchangeOrBuilder {
+        public static final com.google.protobuf.Descriptors.Descriptor
+            getDescriptor() {
+          return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SessionStructure_PendingKeyExchange_descriptor;
+        }
+
+        protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+            internalGetFieldAccessorTable() {
+          return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SessionStructure_PendingKeyExchange_fieldAccessorTable
+              .ensureFieldAccessorsInitialized(
+                  org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange.class, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange.Builder.class);
+        }
+
+        // Construct using org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange.newBuilder()
+        private Builder() {
+          maybeForceBuilderInitialization();
+        }
+
+        private Builder(
+            com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+          super(parent);
+          maybeForceBuilderInitialization();
+        }
+        private void maybeForceBuilderInitialization() {
+          if (com.google.protobuf.GeneratedMessage.alwaysUseFieldBuilders) {
+          }
+        }
+        private static Builder create() {
+          return new Builder();
+        }
+
+        public Builder clear() {
+          super.clear();
+          sequence_ = 0;
+          bitField0_ = (bitField0_ & ~0x00000001);
+          localBaseKey_ = com.google.protobuf.ByteString.EMPTY;
+          bitField0_ = (bitField0_ & ~0x00000002);
+          localBaseKeyPrivate_ = com.google.protobuf.ByteString.EMPTY;
+          bitField0_ = (bitField0_ & ~0x00000004);
+          localRatchetKey_ = com.google.protobuf.ByteString.EMPTY;
+          bitField0_ = (bitField0_ & ~0x00000008);
+          localRatchetKeyPrivate_ = com.google.protobuf.ByteString.EMPTY;
+          bitField0_ = (bitField0_ & ~0x00000010);
+          localIdentityKey_ = com.google.protobuf.ByteString.EMPTY;
+          bitField0_ = (bitField0_ & ~0x00000020);
+          localIdentityKeyPrivate_ = com.google.protobuf.ByteString.EMPTY;
+          bitField0_ = (bitField0_ & ~0x00000040);
+          return this;
+        }
+
+        public Builder clone() {
+          return create().mergeFrom(buildPartial());
+        }
+
+        public com.google.protobuf.Descriptors.Descriptor
+            getDescriptorForType() {
+          return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SessionStructure_PendingKeyExchange_descriptor;
+        }
+
+        public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange getDefaultInstanceForType() {
+          return org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange.getDefaultInstance();
+        }
+
+        public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange build() {
+          org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange result = buildPartial();
+          if (!result.isInitialized()) {
+            throw newUninitializedMessageException(result);
+          }
+          return result;
+        }
+
+        public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange buildPartial() {
+          org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange result = new org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange(this);
+          int from_bitField0_ = bitField0_;
+          int to_bitField0_ = 0;
+          if (((from_bitField0_ & 0x00000001) == 0x00000001)) {
+            to_bitField0_ |= 0x00000001;
+          }
+          result.sequence_ = sequence_;
+          if (((from_bitField0_ & 0x00000002) == 0x00000002)) {
+            to_bitField0_ |= 0x00000002;
+          }
+          result.localBaseKey_ = localBaseKey_;
+          if (((from_bitField0_ & 0x00000004) == 0x00000004)) {
+            to_bitField0_ |= 0x00000004;
+          }
+          result.localBaseKeyPrivate_ = localBaseKeyPrivate_;
+          if (((from_bitField0_ & 0x00000008) == 0x00000008)) {
+            to_bitField0_ |= 0x00000008;
+          }
+          result.localRatchetKey_ = localRatchetKey_;
+          if (((from_bitField0_ & 0x00000010) == 0x00000010)) {
+            to_bitField0_ |= 0x00000010;
+          }
+          result.localRatchetKeyPrivate_ = localRatchetKeyPrivate_;
+          if (((from_bitField0_ & 0x00000020) == 0x00000020)) {
+            to_bitField0_ |= 0x00000020;
+          }
+          result.localIdentityKey_ = localIdentityKey_;
+          if (((from_bitField0_ & 0x00000040) == 0x00000040)) {
+            to_bitField0_ |= 0x00000040;
+          }
+          result.localIdentityKeyPrivate_ = localIdentityKeyPrivate_;
+          result.bitField0_ = to_bitField0_;
+          onBuilt();
+          return result;
+        }
+
+        public Builder mergeFrom(com.google.protobuf.Message other) {
+          if (other instanceof org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange) {
+            return mergeFrom((org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange)other);
+          } else {
+            super.mergeFrom(other);
+            return this;
+          }
+        }
+
+        public Builder mergeFrom(org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange other) {
+          if (other == org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange.getDefaultInstance()) return this;
+          if (other.hasSequence()) {
+            setSequence(other.getSequence());
+          }
+          if (other.hasLocalBaseKey()) {
+            setLocalBaseKey(other.getLocalBaseKey());
+          }
+          if (other.hasLocalBaseKeyPrivate()) {
+            setLocalBaseKeyPrivate(other.getLocalBaseKeyPrivate());
+          }
+          if (other.hasLocalRatchetKey()) {
+            setLocalRatchetKey(other.getLocalRatchetKey());
+          }
+          if (other.hasLocalRatchetKeyPrivate()) {
+            setLocalRatchetKeyPrivate(other.getLocalRatchetKeyPrivate());
+          }
+          if (other.hasLocalIdentityKey()) {
+            setLocalIdentityKey(other.getLocalIdentityKey());
+          }
+          if (other.hasLocalIdentityKeyPrivate()) {
+            setLocalIdentityKeyPrivate(other.getLocalIdentityKeyPrivate());
+          }
+          this.mergeUnknownFields(other.getUnknownFields());
+          return this;
+        }
+
+        public final boolean isInitialized() {
+          return true;
+        }
+
+        public Builder mergeFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws java.io.IOException {
+          org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange parsedMessage = null;
+          try {
+            parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+          } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+            parsedMessage = (org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange) e.getUnfinishedMessage();
+            throw e;
+          } finally {
+            if (parsedMessage != null) {
+              mergeFrom(parsedMessage);
+            }
+          }
+          return this;
+        }
+        private int bitField0_;
+
+        // optional uint32 sequence = 1;
+        private int sequence_ ;
+        /**
+         * <code>optional uint32 sequence = 1;</code>
+         */
+        public boolean hasSequence() {
+          return ((bitField0_ & 0x00000001) == 0x00000001);
+        }
+        /**
+         * <code>optional uint32 sequence = 1;</code>
+         */
+        public int getSequence() {
+          return sequence_;
+        }
+        /**
+         * <code>optional uint32 sequence = 1;</code>
+         */
+        public Builder setSequence(int value) {
+          bitField0_ |= 0x00000001;
+          sequence_ = value;
+          onChanged();
+          return this;
+        }
+        /**
+         * <code>optional uint32 sequence = 1;</code>
+         */
+        public Builder clearSequence() {
+          bitField0_ = (bitField0_ & ~0x00000001);
+          sequence_ = 0;
+          onChanged();
+          return this;
+        }
+
+        // optional bytes localBaseKey = 2;
+        private com.google.protobuf.ByteString localBaseKey_ = com.google.protobuf.ByteString.EMPTY;
+        /**
+         * <code>optional bytes localBaseKey = 2;</code>
+         */
+        public boolean hasLocalBaseKey() {
+          return ((bitField0_ & 0x00000002) == 0x00000002);
+        }
+        /**
+         * <code>optional bytes localBaseKey = 2;</code>
+         */
+        public com.google.protobuf.ByteString getLocalBaseKey() {
+          return localBaseKey_;
+        }
+        /**
+         * <code>optional bytes localBaseKey = 2;</code>
+         */
+        public Builder setLocalBaseKey(com.google.protobuf.ByteString value) {
+          if (value == null) {
+    throw new NullPointerException();
+  }
+  bitField0_ |= 0x00000002;
+          localBaseKey_ = value;
+          onChanged();
+          return this;
+        }
+        /**
+         * <code>optional bytes localBaseKey = 2;</code>
+         */
+        public Builder clearLocalBaseKey() {
+          bitField0_ = (bitField0_ & ~0x00000002);
+          localBaseKey_ = getDefaultInstance().getLocalBaseKey();
+          onChanged();
+          return this;
+        }
+
+        // optional bytes localBaseKeyPrivate = 3;
+        private com.google.protobuf.ByteString localBaseKeyPrivate_ = com.google.protobuf.ByteString.EMPTY;
+        /**
+         * <code>optional bytes localBaseKeyPrivate = 3;</code>
+         */
+        public boolean hasLocalBaseKeyPrivate() {
+          return ((bitField0_ & 0x00000004) == 0x00000004);
+        }
+        /**
+         * <code>optional bytes localBaseKeyPrivate = 3;</code>
+         */
+        public com.google.protobuf.ByteString getLocalBaseKeyPrivate() {
+          return localBaseKeyPrivate_;
+        }
+        /**
+         * <code>optional bytes localBaseKeyPrivate = 3;</code>
+         */
+        public Builder setLocalBaseKeyPrivate(com.google.protobuf.ByteString value) {
+          if (value == null) {
+    throw new NullPointerException();
+  }
+  bitField0_ |= 0x00000004;
+          localBaseKeyPrivate_ = value;
+          onChanged();
+          return this;
+        }
+        /**
+         * <code>optional bytes localBaseKeyPrivate = 3;</code>
+         */
+        public Builder clearLocalBaseKeyPrivate() {
+          bitField0_ = (bitField0_ & ~0x00000004);
+          localBaseKeyPrivate_ = getDefaultInstance().getLocalBaseKeyPrivate();
+          onChanged();
+          return this;
+        }
+
+        // optional bytes localRatchetKey = 4;
+        private com.google.protobuf.ByteString localRatchetKey_ = com.google.protobuf.ByteString.EMPTY;
+        /**
+         * <code>optional bytes localRatchetKey = 4;</code>
+         */
+        public boolean hasLocalRatchetKey() {
+          return ((bitField0_ & 0x00000008) == 0x00000008);
+        }
+        /**
+         * <code>optional bytes localRatchetKey = 4;</code>
+         */
+        public com.google.protobuf.ByteString getLocalRatchetKey() {
+          return localRatchetKey_;
+        }
+        /**
+         * <code>optional bytes localRatchetKey = 4;</code>
+         */
+        public Builder setLocalRatchetKey(com.google.protobuf.ByteString value) {
+          if (value == null) {
+    throw new NullPointerException();
+  }
+  bitField0_ |= 0x00000008;
+          localRatchetKey_ = value;
+          onChanged();
+          return this;
+        }
+        /**
+         * <code>optional bytes localRatchetKey = 4;</code>
+         */
+        public Builder clearLocalRatchetKey() {
+          bitField0_ = (bitField0_ & ~0x00000008);
+          localRatchetKey_ = getDefaultInstance().getLocalRatchetKey();
+          onChanged();
+          return this;
+        }
+
+        // optional bytes localRatchetKeyPrivate = 5;
+        private com.google.protobuf.ByteString localRatchetKeyPrivate_ = com.google.protobuf.ByteString.EMPTY;
+        /**
+         * <code>optional bytes localRatchetKeyPrivate = 5;</code>
+         */
+        public boolean hasLocalRatchetKeyPrivate() {
+          return ((bitField0_ & 0x00000010) == 0x00000010);
+        }
+        /**
+         * <code>optional bytes localRatchetKeyPrivate = 5;</code>
+         */
+        public com.google.protobuf.ByteString getLocalRatchetKeyPrivate() {
+          return localRatchetKeyPrivate_;
+        }
+        /**
+         * <code>optional bytes localRatchetKeyPrivate = 5;</code>
+         */
+        public Builder setLocalRatchetKeyPrivate(com.google.protobuf.ByteString value) {
+          if (value == null) {
+    throw new NullPointerException();
+  }
+  bitField0_ |= 0x00000010;
+          localRatchetKeyPrivate_ = value;
+          onChanged();
+          return this;
+        }
+        /**
+         * <code>optional bytes localRatchetKeyPrivate = 5;</code>
+         */
+        public Builder clearLocalRatchetKeyPrivate() {
+          bitField0_ = (bitField0_ & ~0x00000010);
+          localRatchetKeyPrivate_ = getDefaultInstance().getLocalRatchetKeyPrivate();
+          onChanged();
+          return this;
+        }
+
+        // optional bytes localIdentityKey = 7;
+        private com.google.protobuf.ByteString localIdentityKey_ = com.google.protobuf.ByteString.EMPTY;
+        /**
+         * <code>optional bytes localIdentityKey = 7;</code>
+         */
+        public boolean hasLocalIdentityKey() {
+          return ((bitField0_ & 0x00000020) == 0x00000020);
+        }
+        /**
+         * <code>optional bytes localIdentityKey = 7;</code>
+         */
+        public com.google.protobuf.ByteString getLocalIdentityKey() {
+          return localIdentityKey_;
+        }
+        /**
+         * <code>optional bytes localIdentityKey = 7;</code>
+         */
+        public Builder setLocalIdentityKey(com.google.protobuf.ByteString value) {
+          if (value == null) {
+    throw new NullPointerException();
+  }
+  bitField0_ |= 0x00000020;
+          localIdentityKey_ = value;
+          onChanged();
+          return this;
+        }
+        /**
+         * <code>optional bytes localIdentityKey = 7;</code>
+         */
+        public Builder clearLocalIdentityKey() {
+          bitField0_ = (bitField0_ & ~0x00000020);
+          localIdentityKey_ = getDefaultInstance().getLocalIdentityKey();
+          onChanged();
+          return this;
+        }
+
+        // optional bytes localIdentityKeyPrivate = 8;
+        private com.google.protobuf.ByteString localIdentityKeyPrivate_ = com.google.protobuf.ByteString.EMPTY;
+        /**
+         * <code>optional bytes localIdentityKeyPrivate = 8;</code>
+         */
+        public boolean hasLocalIdentityKeyPrivate() {
+          return ((bitField0_ & 0x00000040) == 0x00000040);
+        }
+        /**
+         * <code>optional bytes localIdentityKeyPrivate = 8;</code>
+         */
+        public com.google.protobuf.ByteString getLocalIdentityKeyPrivate() {
+          return localIdentityKeyPrivate_;
+        }
+        /**
+         * <code>optional bytes localIdentityKeyPrivate = 8;</code>
+         */
+        public Builder setLocalIdentityKeyPrivate(com.google.protobuf.ByteString value) {
+          if (value == null) {
+    throw new NullPointerException();
+  }
+  bitField0_ |= 0x00000040;
+          localIdentityKeyPrivate_ = value;
+          onChanged();
+          return this;
+        }
+        /**
+         * <code>optional bytes localIdentityKeyPrivate = 8;</code>
+         */
+        public Builder clearLocalIdentityKeyPrivate() {
+          bitField0_ = (bitField0_ & ~0x00000040);
+          localIdentityKeyPrivate_ = getDefaultInstance().getLocalIdentityKeyPrivate();
+          onChanged();
+          return this;
+        }
+
+        // @@protoc_insertion_point(builder_scope:textsecure.SessionStructure.PendingKeyExchange)
+      }
+
+      static {
+        defaultInstance = new PendingKeyExchange(true);
+        defaultInstance.initFields();
+      }
+
+      // @@protoc_insertion_point(class_scope:textsecure.SessionStructure.PendingKeyExchange)
+    }
+
+    public interface PendingPreKeyOrBuilder
+        extends com.google.protobuf.MessageOrBuilder {
+
+      // optional uint32 preKeyId = 1;
+      /**
+       * <code>optional uint32 preKeyId = 1;</code>
+       */
+      boolean hasPreKeyId();
+      /**
+       * <code>optional uint32 preKeyId = 1;</code>
+       */
+      int getPreKeyId();
+
+      // optional int32 signedPreKeyId = 3;
+      /**
+       * <code>optional int32 signedPreKeyId = 3;</code>
+       */
+      boolean hasSignedPreKeyId();
+      /**
+       * <code>optional int32 signedPreKeyId = 3;</code>
+       */
+      int getSignedPreKeyId();
+
+      // optional bytes baseKey = 2;
+      /**
+       * <code>optional bytes baseKey = 2;</code>
+       */
+      boolean hasBaseKey();
+      /**
+       * <code>optional bytes baseKey = 2;</code>
+       */
+      com.google.protobuf.ByteString getBaseKey();
+    }
+    /**
+     * Protobuf type {@code textsecure.SessionStructure.PendingPreKey}
+     */
+    public static final class PendingPreKey extends
+        com.google.protobuf.GeneratedMessage
+        implements PendingPreKeyOrBuilder {
+      // Use PendingPreKey.newBuilder() to construct.
+      private PendingPreKey(com.google.protobuf.GeneratedMessage.Builder<?> builder) {
+        super(builder);
+        this.unknownFields = builder.getUnknownFields();
+      }
+      private PendingPreKey(boolean noInit) { this.unknownFields = com.google.protobuf.UnknownFieldSet.getDefaultInstance(); }
+
+      private static final PendingPreKey defaultInstance;
+      public static PendingPreKey getDefaultInstance() {
+        return defaultInstance;
+      }
+
+      public PendingPreKey getDefaultInstanceForType() {
+        return defaultInstance;
+      }
+
+      private final com.google.protobuf.UnknownFieldSet unknownFields;
+      @java.lang.Override
+      public final com.google.protobuf.UnknownFieldSet
+          getUnknownFields() {
+        return this.unknownFields;
+      }
+      private PendingPreKey(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        initFields();
+        int mutable_bitField0_ = 0;
+        com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+            com.google.protobuf.UnknownFieldSet.newBuilder();
+        try {
+          boolean done = false;
+          while (!done) {
+            int tag = input.readTag();
+            switch (tag) {
+              case 0:
+                done = true;
+                break;
+              default: {
+                if (!parseUnknownField(input, unknownFields,
+                                       extensionRegistry, tag)) {
+                  done = true;
+                }
+                break;
+              }
+              case 8: {
+                bitField0_ |= 0x00000001;
+                preKeyId_ = input.readUInt32();
+                break;
+              }
+              case 18: {
+                bitField0_ |= 0x00000004;
+                baseKey_ = input.readBytes();
+                break;
+              }
+              case 24: {
+                bitField0_ |= 0x00000002;
+                signedPreKeyId_ = input.readInt32();
+                break;
+              }
+            }
+          }
+        } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+          throw e.setUnfinishedMessage(this);
+        } catch (java.io.IOException e) {
+          throw new com.google.protobuf.InvalidProtocolBufferException(
+              e.getMessage()).setUnfinishedMessage(this);
+        } finally {
+          this.unknownFields = unknownFields.build();
+          makeExtensionsImmutable();
+        }
+      }
+      public static final com.google.protobuf.Descriptors.Descriptor
+          getDescriptor() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SessionStructure_PendingPreKey_descriptor;
+      }
+
+      protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+          internalGetFieldAccessorTable() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SessionStructure_PendingPreKey_fieldAccessorTable
+            .ensureFieldAccessorsInitialized(
+                org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey.class, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey.Builder.class);
+      }
+
+      public static com.google.protobuf.Parser<PendingPreKey> PARSER =
+          new com.google.protobuf.AbstractParser<PendingPreKey>() {
+        public PendingPreKey parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new PendingPreKey(input, extensionRegistry);
+        }
+      };
+
+      @java.lang.Override
+      public com.google.protobuf.Parser<PendingPreKey> getParserForType() {
+        return PARSER;
+      }
+
+      private int bitField0_;
+      // optional uint32 preKeyId = 1;
+      public static final int PREKEYID_FIELD_NUMBER = 1;
+      private int preKeyId_;
+      /**
+       * <code>optional uint32 preKeyId = 1;</code>
+       */
+      public boolean hasPreKeyId() {
+        return ((bitField0_ & 0x00000001) == 0x00000001);
+      }
+      /**
+       * <code>optional uint32 preKeyId = 1;</code>
+       */
+      public int getPreKeyId() {
+        return preKeyId_;
+      }
+
+      // optional int32 signedPreKeyId = 3;
+      public static final int SIGNEDPREKEYID_FIELD_NUMBER = 3;
+      private int signedPreKeyId_;
+      /**
+       * <code>optional int32 signedPreKeyId = 3;</code>
+       */
+      public boolean hasSignedPreKeyId() {
+        return ((bitField0_ & 0x00000002) == 0x00000002);
+      }
+      /**
+       * <code>optional int32 signedPreKeyId = 3;</code>
+       */
+      public int getSignedPreKeyId() {
+        return signedPreKeyId_;
+      }
+
+      // optional bytes baseKey = 2;
+      public static final int BASEKEY_FIELD_NUMBER = 2;
+      private com.google.protobuf.ByteString baseKey_;
+      /**
+       * <code>optional bytes baseKey = 2;</code>
+       */
+      public boolean hasBaseKey() {
+        return ((bitField0_ & 0x00000004) == 0x00000004);
+      }
+      /**
+       * <code>optional bytes baseKey = 2;</code>
+       */
+      public com.google.protobuf.ByteString getBaseKey() {
+        return baseKey_;
+      }
+
+      private void initFields() {
+        preKeyId_ = 0;
+        signedPreKeyId_ = 0;
+        baseKey_ = com.google.protobuf.ByteString.EMPTY;
+      }
+      private byte memoizedIsInitialized = -1;
+      public final boolean isInitialized() {
+        byte isInitialized = memoizedIsInitialized;
+        if (isInitialized != -1) return isInitialized == 1;
+
+        memoizedIsInitialized = 1;
+        return true;
+      }
+
+      public void writeTo(com.google.protobuf.CodedOutputStream output)
+                          throws java.io.IOException {
+        getSerializedSize();
+        if (((bitField0_ & 0x00000001) == 0x00000001)) {
+          output.writeUInt32(1, preKeyId_);
+        }
+        if (((bitField0_ & 0x00000004) == 0x00000004)) {
+          output.writeBytes(2, baseKey_);
+        }
+        if (((bitField0_ & 0x00000002) == 0x00000002)) {
+          output.writeInt32(3, signedPreKeyId_);
+        }
+        getUnknownFields().writeTo(output);
+      }
+
+      private int memoizedSerializedSize = -1;
+      public int getSerializedSize() {
+        int size = memoizedSerializedSize;
+        if (size != -1) return size;
+
+        size = 0;
+        if (((bitField0_ & 0x00000001) == 0x00000001)) {
+          size += com.google.protobuf.CodedOutputStream
+            .computeUInt32Size(1, preKeyId_);
+        }
+        if (((bitField0_ & 0x00000004) == 0x00000004)) {
+          size += com.google.protobuf.CodedOutputStream
+            .computeBytesSize(2, baseKey_);
+        }
+        if (((bitField0_ & 0x00000002) == 0x00000002)) {
+          size += com.google.protobuf.CodedOutputStream
+            .computeInt32Size(3, signedPreKeyId_);
+        }
+        size += getUnknownFields().getSerializedSize();
+        memoizedSerializedSize = size;
+        return size;
+      }
+
+      private static final long serialVersionUID = 0L;
+      @java.lang.Override
+      protected java.lang.Object writeReplace()
+          throws java.io.ObjectStreamException {
+        return super.writeReplace();
+      }
+
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey parseFrom(
+          com.google.protobuf.ByteString data)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey parseFrom(
+          com.google.protobuf.ByteString data,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data, extensionRegistry);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey parseFrom(byte[] data)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey parseFrom(
+          byte[] data,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data, extensionRegistry);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey parseFrom(java.io.InputStream input)
+          throws java.io.IOException {
+        return PARSER.parseFrom(input);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey parseFrom(
+          java.io.InputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        return PARSER.parseFrom(input, extensionRegistry);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey parseDelimitedFrom(java.io.InputStream input)
+          throws java.io.IOException {
+        return PARSER.parseDelimitedFrom(input);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey parseDelimitedFrom(
+          java.io.InputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        return PARSER.parseDelimitedFrom(input, extensionRegistry);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey parseFrom(
+          com.google.protobuf.CodedInputStream input)
+          throws java.io.IOException {
+        return PARSER.parseFrom(input);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey parseFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        return PARSER.parseFrom(input, extensionRegistry);
+      }
+
+      public static Builder newBuilder() { return Builder.create(); }
+      public Builder newBuilderForType() { return newBuilder(); }
+      public static Builder newBuilder(org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey prototype) {
+        return newBuilder().mergeFrom(prototype);
+      }
+      public Builder toBuilder() { return newBuilder(this); }
+
+      @java.lang.Override
+      protected Builder newBuilderForType(
+          com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+        Builder builder = new Builder(parent);
+        return builder;
+      }
+      /**
+       * Protobuf type {@code textsecure.SessionStructure.PendingPreKey}
+       */
+      public static final class Builder extends
+          com.google.protobuf.GeneratedMessage.Builder<Builder>
+         implements org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKeyOrBuilder {
+        public static final com.google.protobuf.Descriptors.Descriptor
+            getDescriptor() {
+          return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SessionStructure_PendingPreKey_descriptor;
+        }
+
+        protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+            internalGetFieldAccessorTable() {
+          return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SessionStructure_PendingPreKey_fieldAccessorTable
+              .ensureFieldAccessorsInitialized(
+                  org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey.class, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey.Builder.class);
+        }
+
+        // Construct using org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey.newBuilder()
+        private Builder() {
+          maybeForceBuilderInitialization();
+        }
+
+        private Builder(
+            com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+          super(parent);
+          maybeForceBuilderInitialization();
+        }
+        private void maybeForceBuilderInitialization() {
+          if (com.google.protobuf.GeneratedMessage.alwaysUseFieldBuilders) {
+          }
+        }
+        private static Builder create() {
+          return new Builder();
+        }
+
+        public Builder clear() {
+          super.clear();
+          preKeyId_ = 0;
+          bitField0_ = (bitField0_ & ~0x00000001);
+          signedPreKeyId_ = 0;
+          bitField0_ = (bitField0_ & ~0x00000002);
+          baseKey_ = com.google.protobuf.ByteString.EMPTY;
+          bitField0_ = (bitField0_ & ~0x00000004);
+          return this;
+        }
+
+        public Builder clone() {
+          return create().mergeFrom(buildPartial());
+        }
+
+        public com.google.protobuf.Descriptors.Descriptor
+            getDescriptorForType() {
+          return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SessionStructure_PendingPreKey_descriptor;
+        }
+
+        public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey getDefaultInstanceForType() {
+          return org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey.getDefaultInstance();
+        }
+
+        public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey build() {
+          org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey result = buildPartial();
+          if (!result.isInitialized()) {
+            throw newUninitializedMessageException(result);
+          }
+          return result;
+        }
+
+        public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey buildPartial() {
+          org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey result = new org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey(this);
+          int from_bitField0_ = bitField0_;
+          int to_bitField0_ = 0;
+          if (((from_bitField0_ & 0x00000001) == 0x00000001)) {
+            to_bitField0_ |= 0x00000001;
+          }
+          result.preKeyId_ = preKeyId_;
+          if (((from_bitField0_ & 0x00000002) == 0x00000002)) {
+            to_bitField0_ |= 0x00000002;
+          }
+          result.signedPreKeyId_ = signedPreKeyId_;
+          if (((from_bitField0_ & 0x00000004) == 0x00000004)) {
+            to_bitField0_ |= 0x00000004;
+          }
+          result.baseKey_ = baseKey_;
+          result.bitField0_ = to_bitField0_;
+          onBuilt();
+          return result;
+        }
+
+        public Builder mergeFrom(com.google.protobuf.Message other) {
+          if (other instanceof org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey) {
+            return mergeFrom((org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey)other);
+          } else {
+            super.mergeFrom(other);
+            return this;
+          }
+        }
+
+        public Builder mergeFrom(org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey other) {
+          if (other == org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey.getDefaultInstance()) return this;
+          if (other.hasPreKeyId()) {
+            setPreKeyId(other.getPreKeyId());
+          }
+          if (other.hasSignedPreKeyId()) {
+            setSignedPreKeyId(other.getSignedPreKeyId());
+          }
+          if (other.hasBaseKey()) {
+            setBaseKey(other.getBaseKey());
+          }
+          this.mergeUnknownFields(other.getUnknownFields());
+          return this;
+        }
+
+        public final boolean isInitialized() {
+          return true;
+        }
+
+        public Builder mergeFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws java.io.IOException {
+          org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey parsedMessage = null;
+          try {
+            parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+          } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+            parsedMessage = (org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey) e.getUnfinishedMessage();
+            throw e;
+          } finally {
+            if (parsedMessage != null) {
+              mergeFrom(parsedMessage);
+            }
+          }
+          return this;
+        }
+        private int bitField0_;
+
+        // optional uint32 preKeyId = 1;
+        private int preKeyId_ ;
+        /**
+         * <code>optional uint32 preKeyId = 1;</code>
+         */
+        public boolean hasPreKeyId() {
+          return ((bitField0_ & 0x00000001) == 0x00000001);
+        }
+        /**
+         * <code>optional uint32 preKeyId = 1;</code>
+         */
+        public int getPreKeyId() {
+          return preKeyId_;
+        }
+        /**
+         * <code>optional uint32 preKeyId = 1;</code>
+         */
+        public Builder setPreKeyId(int value) {
+          bitField0_ |= 0x00000001;
+          preKeyId_ = value;
+          onChanged();
+          return this;
+        }
+        /**
+         * <code>optional uint32 preKeyId = 1;</code>
+         */
+        public Builder clearPreKeyId() {
+          bitField0_ = (bitField0_ & ~0x00000001);
+          preKeyId_ = 0;
+          onChanged();
+          return this;
+        }
+
+        // optional int32 signedPreKeyId = 3;
+        private int signedPreKeyId_ ;
+        /**
+         * <code>optional int32 signedPreKeyId = 3;</code>
+         */
+        public boolean hasSignedPreKeyId() {
+          return ((bitField0_ & 0x00000002) == 0x00000002);
+        }
+        /**
+         * <code>optional int32 signedPreKeyId = 3;</code>
+         */
+        public int getSignedPreKeyId() {
+          return signedPreKeyId_;
+        }
+        /**
+         * <code>optional int32 signedPreKeyId = 3;</code>
+         */
+        public Builder setSignedPreKeyId(int value) {
+          bitField0_ |= 0x00000002;
+          signedPreKeyId_ = value;
+          onChanged();
+          return this;
+        }
+        /**
+         * <code>optional int32 signedPreKeyId = 3;</code>
+         */
+        public Builder clearSignedPreKeyId() {
+          bitField0_ = (bitField0_ & ~0x00000002);
+          signedPreKeyId_ = 0;
+          onChanged();
+          return this;
+        }
+
+        // optional bytes baseKey = 2;
+        private com.google.protobuf.ByteString baseKey_ = com.google.protobuf.ByteString.EMPTY;
+        /**
+         * <code>optional bytes baseKey = 2;</code>
+         */
+        public boolean hasBaseKey() {
+          return ((bitField0_ & 0x00000004) == 0x00000004);
+        }
+        /**
+         * <code>optional bytes baseKey = 2;</code>
+         */
+        public com.google.protobuf.ByteString getBaseKey() {
+          return baseKey_;
+        }
+        /**
+         * <code>optional bytes baseKey = 2;</code>
+         */
+        public Builder setBaseKey(com.google.protobuf.ByteString value) {
+          if (value == null) {
+    throw new NullPointerException();
+  }
+  bitField0_ |= 0x00000004;
+          baseKey_ = value;
+          onChanged();
+          return this;
+        }
+        /**
+         * <code>optional bytes baseKey = 2;</code>
+         */
+        public Builder clearBaseKey() {
+          bitField0_ = (bitField0_ & ~0x00000004);
+          baseKey_ = getDefaultInstance().getBaseKey();
+          onChanged();
+          return this;
+        }
+
+        // @@protoc_insertion_point(builder_scope:textsecure.SessionStructure.PendingPreKey)
+      }
+
+      static {
+        defaultInstance = new PendingPreKey(true);
+        defaultInstance.initFields();
+      }
+
+      // @@protoc_insertion_point(class_scope:textsecure.SessionStructure.PendingPreKey)
+    }
+
+    private int bitField0_;
+    // optional uint32 sessionVersion = 1;
+    public static final int SESSIONVERSION_FIELD_NUMBER = 1;
+    private int sessionVersion_;
+    /**
+     * <code>optional uint32 sessionVersion = 1;</code>
+     */
+    public boolean hasSessionVersion() {
+      return ((bitField0_ & 0x00000001) == 0x00000001);
+    }
+    /**
+     * <code>optional uint32 sessionVersion = 1;</code>
+     */
+    public int getSessionVersion() {
+      return sessionVersion_;
+    }
+
+    // optional bytes localIdentityPublic = 2;
+    public static final int LOCALIDENTITYPUBLIC_FIELD_NUMBER = 2;
+    private com.google.protobuf.ByteString localIdentityPublic_;
+    /**
+     * <code>optional bytes localIdentityPublic = 2;</code>
+     */
+    public boolean hasLocalIdentityPublic() {
+      return ((bitField0_ & 0x00000002) == 0x00000002);
+    }
+    /**
+     * <code>optional bytes localIdentityPublic = 2;</code>
+     */
+    public com.google.protobuf.ByteString getLocalIdentityPublic() {
+      return localIdentityPublic_;
+    }
+
+    // optional bytes remoteIdentityPublic = 3;
+    public static final int REMOTEIDENTITYPUBLIC_FIELD_NUMBER = 3;
+    private com.google.protobuf.ByteString remoteIdentityPublic_;
+    /**
+     * <code>optional bytes remoteIdentityPublic = 3;</code>
+     */
+    public boolean hasRemoteIdentityPublic() {
+      return ((bitField0_ & 0x00000004) == 0x00000004);
+    }
+    /**
+     * <code>optional bytes remoteIdentityPublic = 3;</code>
+     */
+    public com.google.protobuf.ByteString getRemoteIdentityPublic() {
+      return remoteIdentityPublic_;
+    }
+
+    // optional bytes rootKey = 4;
+    public static final int ROOTKEY_FIELD_NUMBER = 4;
+    private com.google.protobuf.ByteString rootKey_;
+    /**
+     * <code>optional bytes rootKey = 4;</code>
+     */
+    public boolean hasRootKey() {
+      return ((bitField0_ & 0x00000008) == 0x00000008);
+    }
+    /**
+     * <code>optional bytes rootKey = 4;</code>
+     */
+    public com.google.protobuf.ByteString getRootKey() {
+      return rootKey_;
+    }
+
+    // optional uint32 previousCounter = 5;
+    public static final int PREVIOUSCOUNTER_FIELD_NUMBER = 5;
+    private int previousCounter_;
+    /**
+     * <code>optional uint32 previousCounter = 5;</code>
+     */
+    public boolean hasPreviousCounter() {
+      return ((bitField0_ & 0x00000010) == 0x00000010);
+    }
+    /**
+     * <code>optional uint32 previousCounter = 5;</code>
+     */
+    public int getPreviousCounter() {
+      return previousCounter_;
+    }
+
+    // optional .textsecure.SessionStructure.Chain senderChain = 6;
+    public static final int SENDERCHAIN_FIELD_NUMBER = 6;
+    private org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain senderChain_;
+    /**
+     * <code>optional .textsecure.SessionStructure.Chain senderChain = 6;</code>
+     */
+    public boolean hasSenderChain() {
+      return ((bitField0_ & 0x00000020) == 0x00000020);
+    }
+    /**
+     * <code>optional .textsecure.SessionStructure.Chain senderChain = 6;</code>
+     */
+    public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain getSenderChain() {
+      return senderChain_;
+    }
+    /**
+     * <code>optional .textsecure.SessionStructure.Chain senderChain = 6;</code>
+     */
+    public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.ChainOrBuilder getSenderChainOrBuilder() {
+      return senderChain_;
+    }
+
+    // repeated .textsecure.SessionStructure.Chain receiverChains = 7;
+    public static final int RECEIVERCHAINS_FIELD_NUMBER = 7;
+    private java.util.List<org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain> receiverChains_;
+    /**
+     * <code>repeated .textsecure.SessionStructure.Chain receiverChains = 7;</code>
+     */
+    public java.util.List<org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain> getReceiverChainsList() {
+      return receiverChains_;
+    }
+    /**
+     * <code>repeated .textsecure.SessionStructure.Chain receiverChains = 7;</code>
+     */
+    public java.util.List<? extends org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.ChainOrBuilder> 
+        getReceiverChainsOrBuilderList() {
+      return receiverChains_;
+    }
+    /**
+     * <code>repeated .textsecure.SessionStructure.Chain receiverChains = 7;</code>
+     */
+    public int getReceiverChainsCount() {
+      return receiverChains_.size();
+    }
+    /**
+     * <code>repeated .textsecure.SessionStructure.Chain receiverChains = 7;</code>
+     */
+    public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain getReceiverChains(int index) {
+      return receiverChains_.get(index);
+    }
+    /**
+     * <code>repeated .textsecure.SessionStructure.Chain receiverChains = 7;</code>
+     */
+    public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.ChainOrBuilder getReceiverChainsOrBuilder(
+        int index) {
+      return receiverChains_.get(index);
+    }
+
+    // optional .textsecure.SessionStructure.PendingKeyExchange pendingKeyExchange = 8;
+    public static final int PENDINGKEYEXCHANGE_FIELD_NUMBER = 8;
+    private org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange pendingKeyExchange_;
+    /**
+     * <code>optional .textsecure.SessionStructure.PendingKeyExchange pendingKeyExchange = 8;</code>
+     */
+    public boolean hasPendingKeyExchange() {
+      return ((bitField0_ & 0x00000040) == 0x00000040);
+    }
+    /**
+     * <code>optional .textsecure.SessionStructure.PendingKeyExchange pendingKeyExchange = 8;</code>
+     */
+    public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange getPendingKeyExchange() {
+      return pendingKeyExchange_;
+    }
+    /**
+     * <code>optional .textsecure.SessionStructure.PendingKeyExchange pendingKeyExchange = 8;</code>
+     */
+    public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchangeOrBuilder getPendingKeyExchangeOrBuilder() {
+      return pendingKeyExchange_;
+    }
+
+    // optional .textsecure.SessionStructure.PendingPreKey pendingPreKey = 9;
+    public static final int PENDINGPREKEY_FIELD_NUMBER = 9;
+    private org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey pendingPreKey_;
+    /**
+     * <code>optional .textsecure.SessionStructure.PendingPreKey pendingPreKey = 9;</code>
+     */
+    public boolean hasPendingPreKey() {
+      return ((bitField0_ & 0x00000080) == 0x00000080);
+    }
+    /**
+     * <code>optional .textsecure.SessionStructure.PendingPreKey pendingPreKey = 9;</code>
+     */
+    public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey getPendingPreKey() {
+      return pendingPreKey_;
+    }
+    /**
+     * <code>optional .textsecure.SessionStructure.PendingPreKey pendingPreKey = 9;</code>
+     */
+    public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKeyOrBuilder getPendingPreKeyOrBuilder() {
+      return pendingPreKey_;
+    }
+
+    // optional uint32 remoteRegistrationId = 10;
+    public static final int REMOTEREGISTRATIONID_FIELD_NUMBER = 10;
+    private int remoteRegistrationId_;
+    /**
+     * <code>optional uint32 remoteRegistrationId = 10;</code>
+     */
+    public boolean hasRemoteRegistrationId() {
+      return ((bitField0_ & 0x00000100) == 0x00000100);
+    }
+    /**
+     * <code>optional uint32 remoteRegistrationId = 10;</code>
+     */
+    public int getRemoteRegistrationId() {
+      return remoteRegistrationId_;
+    }
+
+    // optional uint32 localRegistrationId = 11;
+    public static final int LOCALREGISTRATIONID_FIELD_NUMBER = 11;
+    private int localRegistrationId_;
+    /**
+     * <code>optional uint32 localRegistrationId = 11;</code>
+     */
+    public boolean hasLocalRegistrationId() {
+      return ((bitField0_ & 0x00000200) == 0x00000200);
+    }
+    /**
+     * <code>optional uint32 localRegistrationId = 11;</code>
+     */
+    public int getLocalRegistrationId() {
+      return localRegistrationId_;
+    }
+
+    // optional bool needsRefresh = 12;
+    public static final int NEEDSREFRESH_FIELD_NUMBER = 12;
+    private boolean needsRefresh_;
+    /**
+     * <code>optional bool needsRefresh = 12;</code>
+     */
+    public boolean hasNeedsRefresh() {
+      return ((bitField0_ & 0x00000400) == 0x00000400);
+    }
+    /**
+     * <code>optional bool needsRefresh = 12;</code>
+     */
+    public boolean getNeedsRefresh() {
+      return needsRefresh_;
+    }
+
+    // optional bytes aliceBaseKey = 13;
+    public static final int ALICEBASEKEY_FIELD_NUMBER = 13;
+    private com.google.protobuf.ByteString aliceBaseKey_;
+    /**
+     * <code>optional bytes aliceBaseKey = 13;</code>
+     */
+    public boolean hasAliceBaseKey() {
+      return ((bitField0_ & 0x00000800) == 0x00000800);
+    }
+    /**
+     * <code>optional bytes aliceBaseKey = 13;</code>
+     */
+    public com.google.protobuf.ByteString getAliceBaseKey() {
+      return aliceBaseKey_;
+    }
+
+    private void initFields() {
+      sessionVersion_ = 0;
+      localIdentityPublic_ = com.google.protobuf.ByteString.EMPTY;
+      remoteIdentityPublic_ = com.google.protobuf.ByteString.EMPTY;
+      rootKey_ = com.google.protobuf.ByteString.EMPTY;
+      previousCounter_ = 0;
+      senderChain_ = org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.getDefaultInstance();
+      receiverChains_ = java.util.Collections.emptyList();
+      pendingKeyExchange_ = org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange.getDefaultInstance();
+      pendingPreKey_ = org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey.getDefaultInstance();
+      remoteRegistrationId_ = 0;
+      localRegistrationId_ = 0;
+      needsRefresh_ = false;
+      aliceBaseKey_ = com.google.protobuf.ByteString.EMPTY;
+    }
+    private byte memoizedIsInitialized = -1;
+    public final boolean isInitialized() {
+      byte isInitialized = memoizedIsInitialized;
+      if (isInitialized != -1) return isInitialized == 1;
+
+      memoizedIsInitialized = 1;
+      return true;
+    }
+
+    public void writeTo(com.google.protobuf.CodedOutputStream output)
+                        throws java.io.IOException {
+      getSerializedSize();
+      if (((bitField0_ & 0x00000001) == 0x00000001)) {
+        output.writeUInt32(1, sessionVersion_);
+      }
+      if (((bitField0_ & 0x00000002) == 0x00000002)) {
+        output.writeBytes(2, localIdentityPublic_);
+      }
+      if (((bitField0_ & 0x00000004) == 0x00000004)) {
+        output.writeBytes(3, remoteIdentityPublic_);
+      }
+      if (((bitField0_ & 0x00000008) == 0x00000008)) {
+        output.writeBytes(4, rootKey_);
+      }
+      if (((bitField0_ & 0x00000010) == 0x00000010)) {
+        output.writeUInt32(5, previousCounter_);
+      }
+      if (((bitField0_ & 0x00000020) == 0x00000020)) {
+        output.writeMessage(6, senderChain_);
+      }
+      for (int i = 0; i < receiverChains_.size(); i++) {
+        output.writeMessage(7, receiverChains_.get(i));
+      }
+      if (((bitField0_ & 0x00000040) == 0x00000040)) {
+        output.writeMessage(8, pendingKeyExchange_);
+      }
+      if (((bitField0_ & 0x00000080) == 0x00000080)) {
+        output.writeMessage(9, pendingPreKey_);
+      }
+      if (((bitField0_ & 0x00000100) == 0x00000100)) {
+        output.writeUInt32(10, remoteRegistrationId_);
+      }
+      if (((bitField0_ & 0x00000200) == 0x00000200)) {
+        output.writeUInt32(11, localRegistrationId_);
+      }
+      if (((bitField0_ & 0x00000400) == 0x00000400)) {
+        output.writeBool(12, needsRefresh_);
+      }
+      if (((bitField0_ & 0x00000800) == 0x00000800)) {
+        output.writeBytes(13, aliceBaseKey_);
+      }
+      getUnknownFields().writeTo(output);
+    }
+
+    private int memoizedSerializedSize = -1;
+    public int getSerializedSize() {
+      int size = memoizedSerializedSize;
+      if (size != -1) return size;
+
+      size = 0;
+      if (((bitField0_ & 0x00000001) == 0x00000001)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeUInt32Size(1, sessionVersion_);
+      }
+      if (((bitField0_ & 0x00000002) == 0x00000002)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeBytesSize(2, localIdentityPublic_);
+      }
+      if (((bitField0_ & 0x00000004) == 0x00000004)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeBytesSize(3, remoteIdentityPublic_);
+      }
+      if (((bitField0_ & 0x00000008) == 0x00000008)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeBytesSize(4, rootKey_);
+      }
+      if (((bitField0_ & 0x00000010) == 0x00000010)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeUInt32Size(5, previousCounter_);
+      }
+      if (((bitField0_ & 0x00000020) == 0x00000020)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeMessageSize(6, senderChain_);
+      }
+      for (int i = 0; i < receiverChains_.size(); i++) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeMessageSize(7, receiverChains_.get(i));
+      }
+      if (((bitField0_ & 0x00000040) == 0x00000040)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeMessageSize(8, pendingKeyExchange_);
+      }
+      if (((bitField0_ & 0x00000080) == 0x00000080)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeMessageSize(9, pendingPreKey_);
+      }
+      if (((bitField0_ & 0x00000100) == 0x00000100)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeUInt32Size(10, remoteRegistrationId_);
+      }
+      if (((bitField0_ & 0x00000200) == 0x00000200)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeUInt32Size(11, localRegistrationId_);
+      }
+      if (((bitField0_ & 0x00000400) == 0x00000400)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeBoolSize(12, needsRefresh_);
+      }
+      if (((bitField0_ & 0x00000800) == 0x00000800)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeBytesSize(13, aliceBaseKey_);
+      }
+      size += getUnknownFields().getSerializedSize();
+      memoizedSerializedSize = size;
+      return size;
+    }
+
+    private static final long serialVersionUID = 0L;
+    @java.lang.Override
+    protected java.lang.Object writeReplace()
+        throws java.io.ObjectStreamException {
+      return super.writeReplace();
+    }
+
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure parseFrom(
+        com.google.protobuf.ByteString data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure parseFrom(
+        com.google.protobuf.ByteString data,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data, extensionRegistry);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure parseFrom(byte[] data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure parseFrom(
+        byte[] data,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data, extensionRegistry);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure parseFrom(java.io.InputStream input)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure parseFrom(
+        java.io.InputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input, extensionRegistry);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure parseDelimitedFrom(java.io.InputStream input)
+        throws java.io.IOException {
+      return PARSER.parseDelimitedFrom(input);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure parseDelimitedFrom(
+        java.io.InputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return PARSER.parseDelimitedFrom(input, extensionRegistry);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure parseFrom(
+        com.google.protobuf.CodedInputStream input)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure parseFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input, extensionRegistry);
+    }
+
+    public static Builder newBuilder() { return Builder.create(); }
+    public Builder newBuilderForType() { return newBuilder(); }
+    public static Builder newBuilder(org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure prototype) {
+      return newBuilder().mergeFrom(prototype);
+    }
+    public Builder toBuilder() { return newBuilder(this); }
+
+    @java.lang.Override
+    protected Builder newBuilderForType(
+        com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+      Builder builder = new Builder(parent);
+      return builder;
+    }
+    /**
+     * Protobuf type {@code textsecure.SessionStructure}
+     */
+    public static final class Builder extends
+        com.google.protobuf.GeneratedMessage.Builder<Builder>
+       implements org.whispersystems.libaxolotl.state.StorageProtos.SessionStructureOrBuilder {
+      public static final com.google.protobuf.Descriptors.Descriptor
+          getDescriptor() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SessionStructure_descriptor;
+      }
+
+      protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+          internalGetFieldAccessorTable() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SessionStructure_fieldAccessorTable
+            .ensureFieldAccessorsInitialized(
+                org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.class, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Builder.class);
+      }
+
+      // Construct using org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.newBuilder()
+      private Builder() {
+        maybeForceBuilderInitialization();
+      }
+
+      private Builder(
+          com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+        super(parent);
+        maybeForceBuilderInitialization();
+      }
+      private void maybeForceBuilderInitialization() {
+        if (com.google.protobuf.GeneratedMessage.alwaysUseFieldBuilders) {
+          getSenderChainFieldBuilder();
+          getReceiverChainsFieldBuilder();
+          getPendingKeyExchangeFieldBuilder();
+          getPendingPreKeyFieldBuilder();
+        }
+      }
+      private static Builder create() {
+        return new Builder();
+      }
+
+      public Builder clear() {
+        super.clear();
+        sessionVersion_ = 0;
+        bitField0_ = (bitField0_ & ~0x00000001);
+        localIdentityPublic_ = com.google.protobuf.ByteString.EMPTY;
+        bitField0_ = (bitField0_ & ~0x00000002);
+        remoteIdentityPublic_ = com.google.protobuf.ByteString.EMPTY;
+        bitField0_ = (bitField0_ & ~0x00000004);
+        rootKey_ = com.google.protobuf.ByteString.EMPTY;
+        bitField0_ = (bitField0_ & ~0x00000008);
+        previousCounter_ = 0;
+        bitField0_ = (bitField0_ & ~0x00000010);
+        if (senderChainBuilder_ == null) {
+          senderChain_ = org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.getDefaultInstance();
+        } else {
+          senderChainBuilder_.clear();
+        }
+        bitField0_ = (bitField0_ & ~0x00000020);
+        if (receiverChainsBuilder_ == null) {
+          receiverChains_ = java.util.Collections.emptyList();
+          bitField0_ = (bitField0_ & ~0x00000040);
+        } else {
+          receiverChainsBuilder_.clear();
+        }
+        if (pendingKeyExchangeBuilder_ == null) {
+          pendingKeyExchange_ = org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange.getDefaultInstance();
+        } else {
+          pendingKeyExchangeBuilder_.clear();
+        }
+        bitField0_ = (bitField0_ & ~0x00000080);
+        if (pendingPreKeyBuilder_ == null) {
+          pendingPreKey_ = org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey.getDefaultInstance();
+        } else {
+          pendingPreKeyBuilder_.clear();
+        }
+        bitField0_ = (bitField0_ & ~0x00000100);
+        remoteRegistrationId_ = 0;
+        bitField0_ = (bitField0_ & ~0x00000200);
+        localRegistrationId_ = 0;
+        bitField0_ = (bitField0_ & ~0x00000400);
+        needsRefresh_ = false;
+        bitField0_ = (bitField0_ & ~0x00000800);
+        aliceBaseKey_ = com.google.protobuf.ByteString.EMPTY;
+        bitField0_ = (bitField0_ & ~0x00001000);
+        return this;
+      }
+
+      public Builder clone() {
+        return create().mergeFrom(buildPartial());
+      }
+
+      public com.google.protobuf.Descriptors.Descriptor
+          getDescriptorForType() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SessionStructure_descriptor;
+      }
+
+      public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure getDefaultInstanceForType() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.getDefaultInstance();
+      }
+
+      public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure build() {
+        org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure result = buildPartial();
+        if (!result.isInitialized()) {
+          throw newUninitializedMessageException(result);
+        }
+        return result;
+      }
+
+      public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure buildPartial() {
+        org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure result = new org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure(this);
+        int from_bitField0_ = bitField0_;
+        int to_bitField0_ = 0;
+        if (((from_bitField0_ & 0x00000001) == 0x00000001)) {
+          to_bitField0_ |= 0x00000001;
+        }
+        result.sessionVersion_ = sessionVersion_;
+        if (((from_bitField0_ & 0x00000002) == 0x00000002)) {
+          to_bitField0_ |= 0x00000002;
+        }
+        result.localIdentityPublic_ = localIdentityPublic_;
+        if (((from_bitField0_ & 0x00000004) == 0x00000004)) {
+          to_bitField0_ |= 0x00000004;
+        }
+        result.remoteIdentityPublic_ = remoteIdentityPublic_;
+        if (((from_bitField0_ & 0x00000008) == 0x00000008)) {
+          to_bitField0_ |= 0x00000008;
+        }
+        result.rootKey_ = rootKey_;
+        if (((from_bitField0_ & 0x00000010) == 0x00000010)) {
+          to_bitField0_ |= 0x00000010;
+        }
+        result.previousCounter_ = previousCounter_;
+        if (((from_bitField0_ & 0x00000020) == 0x00000020)) {
+          to_bitField0_ |= 0x00000020;
+        }
+        if (senderChainBuilder_ == null) {
+          result.senderChain_ = senderChain_;
+        } else {
+          result.senderChain_ = senderChainBuilder_.build();
+        }
+        if (receiverChainsBuilder_ == null) {
+          if (((bitField0_ & 0x00000040) == 0x00000040)) {
+            receiverChains_ = java.util.Collections.unmodifiableList(receiverChains_);
+            bitField0_ = (bitField0_ & ~0x00000040);
+          }
+          result.receiverChains_ = receiverChains_;
+        } else {
+          result.receiverChains_ = receiverChainsBuilder_.build();
+        }
+        if (((from_bitField0_ & 0x00000080) == 0x00000080)) {
+          to_bitField0_ |= 0x00000040;
+        }
+        if (pendingKeyExchangeBuilder_ == null) {
+          result.pendingKeyExchange_ = pendingKeyExchange_;
+        } else {
+          result.pendingKeyExchange_ = pendingKeyExchangeBuilder_.build();
+        }
+        if (((from_bitField0_ & 0x00000100) == 0x00000100)) {
+          to_bitField0_ |= 0x00000080;
+        }
+        if (pendingPreKeyBuilder_ == null) {
+          result.pendingPreKey_ = pendingPreKey_;
+        } else {
+          result.pendingPreKey_ = pendingPreKeyBuilder_.build();
+        }
+        if (((from_bitField0_ & 0x00000200) == 0x00000200)) {
+          to_bitField0_ |= 0x00000100;
+        }
+        result.remoteRegistrationId_ = remoteRegistrationId_;
+        if (((from_bitField0_ & 0x00000400) == 0x00000400)) {
+          to_bitField0_ |= 0x00000200;
+        }
+        result.localRegistrationId_ = localRegistrationId_;
+        if (((from_bitField0_ & 0x00000800) == 0x00000800)) {
+          to_bitField0_ |= 0x00000400;
+        }
+        result.needsRefresh_ = needsRefresh_;
+        if (((from_bitField0_ & 0x00001000) == 0x00001000)) {
+          to_bitField0_ |= 0x00000800;
+        }
+        result.aliceBaseKey_ = aliceBaseKey_;
+        result.bitField0_ = to_bitField0_;
+        onBuilt();
+        return result;
+      }
+
+      public Builder mergeFrom(com.google.protobuf.Message other) {
+        if (other instanceof org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure) {
+          return mergeFrom((org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure)other);
+        } else {
+          super.mergeFrom(other);
+          return this;
+        }
+      }
+
+      public Builder mergeFrom(org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure other) {
+        if (other == org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.getDefaultInstance()) return this;
+        if (other.hasSessionVersion()) {
+          setSessionVersion(other.getSessionVersion());
+        }
+        if (other.hasLocalIdentityPublic()) {
+          setLocalIdentityPublic(other.getLocalIdentityPublic());
+        }
+        if (other.hasRemoteIdentityPublic()) {
+          setRemoteIdentityPublic(other.getRemoteIdentityPublic());
+        }
+        if (other.hasRootKey()) {
+          setRootKey(other.getRootKey());
+        }
+        if (other.hasPreviousCounter()) {
+          setPreviousCounter(other.getPreviousCounter());
+        }
+        if (other.hasSenderChain()) {
+          mergeSenderChain(other.getSenderChain());
+        }
+        if (receiverChainsBuilder_ == null) {
+          if (!other.receiverChains_.isEmpty()) {
+            if (receiverChains_.isEmpty()) {
+              receiverChains_ = other.receiverChains_;
+              bitField0_ = (bitField0_ & ~0x00000040);
+            } else {
+              ensureReceiverChainsIsMutable();
+              receiverChains_.addAll(other.receiverChains_);
+            }
+            onChanged();
+          }
+        } else {
+          if (!other.receiverChains_.isEmpty()) {
+            if (receiverChainsBuilder_.isEmpty()) {
+              receiverChainsBuilder_.dispose();
+              receiverChainsBuilder_ = null;
+              receiverChains_ = other.receiverChains_;
+              bitField0_ = (bitField0_ & ~0x00000040);
+              receiverChainsBuilder_ = 
+                com.google.protobuf.GeneratedMessage.alwaysUseFieldBuilders ?
+                   getReceiverChainsFieldBuilder() : null;
+            } else {
+              receiverChainsBuilder_.addAllMessages(other.receiverChains_);
+            }
+          }
+        }
+        if (other.hasPendingKeyExchange()) {
+          mergePendingKeyExchange(other.getPendingKeyExchange());
+        }
+        if (other.hasPendingPreKey()) {
+          mergePendingPreKey(other.getPendingPreKey());
+        }
+        if (other.hasRemoteRegistrationId()) {
+          setRemoteRegistrationId(other.getRemoteRegistrationId());
+        }
+        if (other.hasLocalRegistrationId()) {
+          setLocalRegistrationId(other.getLocalRegistrationId());
+        }
+        if (other.hasNeedsRefresh()) {
+          setNeedsRefresh(other.getNeedsRefresh());
+        }
+        if (other.hasAliceBaseKey()) {
+          setAliceBaseKey(other.getAliceBaseKey());
+        }
+        this.mergeUnknownFields(other.getUnknownFields());
+        return this;
+      }
+
+      public final boolean isInitialized() {
+        return true;
+      }
+
+      public Builder mergeFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure parsedMessage = null;
+        try {
+          parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+        } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+          parsedMessage = (org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure) e.getUnfinishedMessage();
+          throw e;
+        } finally {
+          if (parsedMessage != null) {
+            mergeFrom(parsedMessage);
+          }
+        }
+        return this;
+      }
+      private int bitField0_;
+
+      // optional uint32 sessionVersion = 1;
+      private int sessionVersion_ ;
+      /**
+       * <code>optional uint32 sessionVersion = 1;</code>
+       */
+      public boolean hasSessionVersion() {
+        return ((bitField0_ & 0x00000001) == 0x00000001);
+      }
+      /**
+       * <code>optional uint32 sessionVersion = 1;</code>
+       */
+      public int getSessionVersion() {
+        return sessionVersion_;
+      }
+      /**
+       * <code>optional uint32 sessionVersion = 1;</code>
+       */
+      public Builder setSessionVersion(int value) {
+        bitField0_ |= 0x00000001;
+        sessionVersion_ = value;
+        onChanged();
+        return this;
+      }
+      /**
+       * <code>optional uint32 sessionVersion = 1;</code>
+       */
+      public Builder clearSessionVersion() {
+        bitField0_ = (bitField0_ & ~0x00000001);
+        sessionVersion_ = 0;
+        onChanged();
+        return this;
+      }
+
+      // optional bytes localIdentityPublic = 2;
+      private com.google.protobuf.ByteString localIdentityPublic_ = com.google.protobuf.ByteString.EMPTY;
+      /**
+       * <code>optional bytes localIdentityPublic = 2;</code>
+       */
+      public boolean hasLocalIdentityPublic() {
+        return ((bitField0_ & 0x00000002) == 0x00000002);
+      }
+      /**
+       * <code>optional bytes localIdentityPublic = 2;</code>
+       */
+      public com.google.protobuf.ByteString getLocalIdentityPublic() {
+        return localIdentityPublic_;
+      }
+      /**
+       * <code>optional bytes localIdentityPublic = 2;</code>
+       */
+      public Builder setLocalIdentityPublic(com.google.protobuf.ByteString value) {
+        if (value == null) {
+    throw new NullPointerException();
+  }
+  bitField0_ |= 0x00000002;
+        localIdentityPublic_ = value;
+        onChanged();
+        return this;
+      }
+      /**
+       * <code>optional bytes localIdentityPublic = 2;</code>
+       */
+      public Builder clearLocalIdentityPublic() {
+        bitField0_ = (bitField0_ & ~0x00000002);
+        localIdentityPublic_ = getDefaultInstance().getLocalIdentityPublic();
+        onChanged();
+        return this;
+      }
+
+      // optional bytes remoteIdentityPublic = 3;
+      private com.google.protobuf.ByteString remoteIdentityPublic_ = com.google.protobuf.ByteString.EMPTY;
+      /**
+       * <code>optional bytes remoteIdentityPublic = 3;</code>
+       */
+      public boolean hasRemoteIdentityPublic() {
+        return ((bitField0_ & 0x00000004) == 0x00000004);
+      }
+      /**
+       * <code>optional bytes remoteIdentityPublic = 3;</code>
+       */
+      public com.google.protobuf.ByteString getRemoteIdentityPublic() {
+        return remoteIdentityPublic_;
+      }
+      /**
+       * <code>optional bytes remoteIdentityPublic = 3;</code>
+       */
+      public Builder setRemoteIdentityPublic(com.google.protobuf.ByteString value) {
+        if (value == null) {
+    throw new NullPointerException();
+  }
+  bitField0_ |= 0x00000004;
+        remoteIdentityPublic_ = value;
+        onChanged();
+        return this;
+      }
+      /**
+       * <code>optional bytes remoteIdentityPublic = 3;</code>
+       */
+      public Builder clearRemoteIdentityPublic() {
+        bitField0_ = (bitField0_ & ~0x00000004);
+        remoteIdentityPublic_ = getDefaultInstance().getRemoteIdentityPublic();
+        onChanged();
+        return this;
+      }
+
+      // optional bytes rootKey = 4;
+      private com.google.protobuf.ByteString rootKey_ = com.google.protobuf.ByteString.EMPTY;
+      /**
+       * <code>optional bytes rootKey = 4;</code>
+       */
+      public boolean hasRootKey() {
+        return ((bitField0_ & 0x00000008) == 0x00000008);
+      }
+      /**
+       * <code>optional bytes rootKey = 4;</code>
+       */
+      public com.google.protobuf.ByteString getRootKey() {
+        return rootKey_;
+      }
+      /**
+       * <code>optional bytes rootKey = 4;</code>
+       */
+      public Builder setRootKey(com.google.protobuf.ByteString value) {
+        if (value == null) {
+    throw new NullPointerException();
+  }
+  bitField0_ |= 0x00000008;
+        rootKey_ = value;
+        onChanged();
+        return this;
+      }
+      /**
+       * <code>optional bytes rootKey = 4;</code>
+       */
+      public Builder clearRootKey() {
+        bitField0_ = (bitField0_ & ~0x00000008);
+        rootKey_ = getDefaultInstance().getRootKey();
+        onChanged();
+        return this;
+      }
+
+      // optional uint32 previousCounter = 5;
+      private int previousCounter_ ;
+      /**
+       * <code>optional uint32 previousCounter = 5;</code>
+       */
+      public boolean hasPreviousCounter() {
+        return ((bitField0_ & 0x00000010) == 0x00000010);
+      }
+      /**
+       * <code>optional uint32 previousCounter = 5;</code>
+       */
+      public int getPreviousCounter() {
+        return previousCounter_;
+      }
+      /**
+       * <code>optional uint32 previousCounter = 5;</code>
+       */
+      public Builder setPreviousCounter(int value) {
+        bitField0_ |= 0x00000010;
+        previousCounter_ = value;
+        onChanged();
+        return this;
+      }
+      /**
+       * <code>optional uint32 previousCounter = 5;</code>
+       */
+      public Builder clearPreviousCounter() {
+        bitField0_ = (bitField0_ & ~0x00000010);
+        previousCounter_ = 0;
+        onChanged();
+        return this;
+      }
+
+      // optional .textsecure.SessionStructure.Chain senderChain = 6;
+      private org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain senderChain_ = org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.getDefaultInstance();
+      private com.google.protobuf.SingleFieldBuilder<
+          org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.ChainOrBuilder> senderChainBuilder_;
+      /**
+       * <code>optional .textsecure.SessionStructure.Chain senderChain = 6;</code>
+       */
+      public boolean hasSenderChain() {
+        return ((bitField0_ & 0x00000020) == 0x00000020);
+      }
+      /**
+       * <code>optional .textsecure.SessionStructure.Chain senderChain = 6;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain getSenderChain() {
+        if (senderChainBuilder_ == null) {
+          return senderChain_;
+        } else {
+          return senderChainBuilder_.getMessage();
+        }
+      }
+      /**
+       * <code>optional .textsecure.SessionStructure.Chain senderChain = 6;</code>
+       */
+      public Builder setSenderChain(org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain value) {
+        if (senderChainBuilder_ == null) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          senderChain_ = value;
+          onChanged();
+        } else {
+          senderChainBuilder_.setMessage(value);
+        }
+        bitField0_ |= 0x00000020;
+        return this;
+      }
+      /**
+       * <code>optional .textsecure.SessionStructure.Chain senderChain = 6;</code>
+       */
+      public Builder setSenderChain(
+          org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.Builder builderForValue) {
+        if (senderChainBuilder_ == null) {
+          senderChain_ = builderForValue.build();
+          onChanged();
+        } else {
+          senderChainBuilder_.setMessage(builderForValue.build());
+        }
+        bitField0_ |= 0x00000020;
+        return this;
+      }
+      /**
+       * <code>optional .textsecure.SessionStructure.Chain senderChain = 6;</code>
+       */
+      public Builder mergeSenderChain(org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain value) {
+        if (senderChainBuilder_ == null) {
+          if (((bitField0_ & 0x00000020) == 0x00000020) &&
+              senderChain_ != org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.getDefaultInstance()) {
+            senderChain_ =
+              org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.newBuilder(senderChain_).mergeFrom(value).buildPartial();
+          } else {
+            senderChain_ = value;
+          }
+          onChanged();
+        } else {
+          senderChainBuilder_.mergeFrom(value);
+        }
+        bitField0_ |= 0x00000020;
+        return this;
+      }
+      /**
+       * <code>optional .textsecure.SessionStructure.Chain senderChain = 6;</code>
+       */
+      public Builder clearSenderChain() {
+        if (senderChainBuilder_ == null) {
+          senderChain_ = org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.getDefaultInstance();
+          onChanged();
+        } else {
+          senderChainBuilder_.clear();
+        }
+        bitField0_ = (bitField0_ & ~0x00000020);
+        return this;
+      }
+      /**
+       * <code>optional .textsecure.SessionStructure.Chain senderChain = 6;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.Builder getSenderChainBuilder() {
+        bitField0_ |= 0x00000020;
+        onChanged();
+        return getSenderChainFieldBuilder().getBuilder();
+      }
+      /**
+       * <code>optional .textsecure.SessionStructure.Chain senderChain = 6;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.ChainOrBuilder getSenderChainOrBuilder() {
+        if (senderChainBuilder_ != null) {
+          return senderChainBuilder_.getMessageOrBuilder();
+        } else {
+          return senderChain_;
+        }
+      }
+      /**
+       * <code>optional .textsecure.SessionStructure.Chain senderChain = 6;</code>
+       */
+      private com.google.protobuf.SingleFieldBuilder<
+          org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.ChainOrBuilder> 
+          getSenderChainFieldBuilder() {
+        if (senderChainBuilder_ == null) {
+          senderChainBuilder_ = new com.google.protobuf.SingleFieldBuilder<
+              org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.ChainOrBuilder>(
+                  senderChain_,
+                  getParentForChildren(),
+                  isClean());
+          senderChain_ = null;
+        }
+        return senderChainBuilder_;
+      }
+
+      // repeated .textsecure.SessionStructure.Chain receiverChains = 7;
+      private java.util.List<org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain> receiverChains_ =
+        java.util.Collections.emptyList();
+      private void ensureReceiverChainsIsMutable() {
+        if (!((bitField0_ & 0x00000040) == 0x00000040)) {
+          receiverChains_ = new java.util.ArrayList<org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain>(receiverChains_);
+          bitField0_ |= 0x00000040;
+         }
+      }
+
+      private com.google.protobuf.RepeatedFieldBuilder<
+          org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.ChainOrBuilder> receiverChainsBuilder_;
+
+      /**
+       * <code>repeated .textsecure.SessionStructure.Chain receiverChains = 7;</code>
+       */
+      public java.util.List<org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain> getReceiverChainsList() {
+        if (receiverChainsBuilder_ == null) {
+          return java.util.Collections.unmodifiableList(receiverChains_);
+        } else {
+          return receiverChainsBuilder_.getMessageList();
+        }
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure.Chain receiverChains = 7;</code>
+       */
+      public int getReceiverChainsCount() {
+        if (receiverChainsBuilder_ == null) {
+          return receiverChains_.size();
+        } else {
+          return receiverChainsBuilder_.getCount();
+        }
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure.Chain receiverChains = 7;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain getReceiverChains(int index) {
+        if (receiverChainsBuilder_ == null) {
+          return receiverChains_.get(index);
+        } else {
+          return receiverChainsBuilder_.getMessage(index);
+        }
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure.Chain receiverChains = 7;</code>
+       */
+      public Builder setReceiverChains(
+          int index, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain value) {
+        if (receiverChainsBuilder_ == null) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          ensureReceiverChainsIsMutable();
+          receiverChains_.set(index, value);
+          onChanged();
+        } else {
+          receiverChainsBuilder_.setMessage(index, value);
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure.Chain receiverChains = 7;</code>
+       */
+      public Builder setReceiverChains(
+          int index, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.Builder builderForValue) {
+        if (receiverChainsBuilder_ == null) {
+          ensureReceiverChainsIsMutable();
+          receiverChains_.set(index, builderForValue.build());
+          onChanged();
+        } else {
+          receiverChainsBuilder_.setMessage(index, builderForValue.build());
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure.Chain receiverChains = 7;</code>
+       */
+      public Builder addReceiverChains(org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain value) {
+        if (receiverChainsBuilder_ == null) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          ensureReceiverChainsIsMutable();
+          receiverChains_.add(value);
+          onChanged();
+        } else {
+          receiverChainsBuilder_.addMessage(value);
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure.Chain receiverChains = 7;</code>
+       */
+      public Builder addReceiverChains(
+          int index, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain value) {
+        if (receiverChainsBuilder_ == null) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          ensureReceiverChainsIsMutable();
+          receiverChains_.add(index, value);
+          onChanged();
+        } else {
+          receiverChainsBuilder_.addMessage(index, value);
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure.Chain receiverChains = 7;</code>
+       */
+      public Builder addReceiverChains(
+          org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.Builder builderForValue) {
+        if (receiverChainsBuilder_ == null) {
+          ensureReceiverChainsIsMutable();
+          receiverChains_.add(builderForValue.build());
+          onChanged();
+        } else {
+          receiverChainsBuilder_.addMessage(builderForValue.build());
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure.Chain receiverChains = 7;</code>
+       */
+      public Builder addReceiverChains(
+          int index, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.Builder builderForValue) {
+        if (receiverChainsBuilder_ == null) {
+          ensureReceiverChainsIsMutable();
+          receiverChains_.add(index, builderForValue.build());
+          onChanged();
+        } else {
+          receiverChainsBuilder_.addMessage(index, builderForValue.build());
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure.Chain receiverChains = 7;</code>
+       */
+      public Builder addAllReceiverChains(
+          java.lang.Iterable<? extends org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain> values) {
+        if (receiverChainsBuilder_ == null) {
+          ensureReceiverChainsIsMutable();
+          super.addAll(values, receiverChains_);
+          onChanged();
+        } else {
+          receiverChainsBuilder_.addAllMessages(values);
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure.Chain receiverChains = 7;</code>
+       */
+      public Builder clearReceiverChains() {
+        if (receiverChainsBuilder_ == null) {
+          receiverChains_ = java.util.Collections.emptyList();
+          bitField0_ = (bitField0_ & ~0x00000040);
+          onChanged();
+        } else {
+          receiverChainsBuilder_.clear();
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure.Chain receiverChains = 7;</code>
+       */
+      public Builder removeReceiverChains(int index) {
+        if (receiverChainsBuilder_ == null) {
+          ensureReceiverChainsIsMutable();
+          receiverChains_.remove(index);
+          onChanged();
+        } else {
+          receiverChainsBuilder_.remove(index);
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure.Chain receiverChains = 7;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.Builder getReceiverChainsBuilder(
+          int index) {
+        return getReceiverChainsFieldBuilder().getBuilder(index);
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure.Chain receiverChains = 7;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.ChainOrBuilder getReceiverChainsOrBuilder(
+          int index) {
+        if (receiverChainsBuilder_ == null) {
+          return receiverChains_.get(index);  } else {
+          return receiverChainsBuilder_.getMessageOrBuilder(index);
+        }
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure.Chain receiverChains = 7;</code>
+       */
+      public java.util.List<? extends org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.ChainOrBuilder> 
+           getReceiverChainsOrBuilderList() {
+        if (receiverChainsBuilder_ != null) {
+          return receiverChainsBuilder_.getMessageOrBuilderList();
+        } else {
+          return java.util.Collections.unmodifiableList(receiverChains_);
+        }
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure.Chain receiverChains = 7;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.Builder addReceiverChainsBuilder() {
+        return getReceiverChainsFieldBuilder().addBuilder(
+            org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.getDefaultInstance());
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure.Chain receiverChains = 7;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.Builder addReceiverChainsBuilder(
+          int index) {
+        return getReceiverChainsFieldBuilder().addBuilder(
+            index, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.getDefaultInstance());
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure.Chain receiverChains = 7;</code>
+       */
+      public java.util.List<org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.Builder> 
+           getReceiverChainsBuilderList() {
+        return getReceiverChainsFieldBuilder().getBuilderList();
+      }
+      private com.google.protobuf.RepeatedFieldBuilder<
+          org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.ChainOrBuilder> 
+          getReceiverChainsFieldBuilder() {
+        if (receiverChainsBuilder_ == null) {
+          receiverChainsBuilder_ = new com.google.protobuf.RepeatedFieldBuilder<
+              org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Chain.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.ChainOrBuilder>(
+                  receiverChains_,
+                  ((bitField0_ & 0x00000040) == 0x00000040),
+                  getParentForChildren(),
+                  isClean());
+          receiverChains_ = null;
+        }
+        return receiverChainsBuilder_;
+      }
+
+      // optional .textsecure.SessionStructure.PendingKeyExchange pendingKeyExchange = 8;
+      private org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange pendingKeyExchange_ = org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange.getDefaultInstance();
+      private com.google.protobuf.SingleFieldBuilder<
+          org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchangeOrBuilder> pendingKeyExchangeBuilder_;
+      /**
+       * <code>optional .textsecure.SessionStructure.PendingKeyExchange pendingKeyExchange = 8;</code>
+       */
+      public boolean hasPendingKeyExchange() {
+        return ((bitField0_ & 0x00000080) == 0x00000080);
+      }
+      /**
+       * <code>optional .textsecure.SessionStructure.PendingKeyExchange pendingKeyExchange = 8;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange getPendingKeyExchange() {
+        if (pendingKeyExchangeBuilder_ == null) {
+          return pendingKeyExchange_;
+        } else {
+          return pendingKeyExchangeBuilder_.getMessage();
+        }
+      }
+      /**
+       * <code>optional .textsecure.SessionStructure.PendingKeyExchange pendingKeyExchange = 8;</code>
+       */
+      public Builder setPendingKeyExchange(org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange value) {
+        if (pendingKeyExchangeBuilder_ == null) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          pendingKeyExchange_ = value;
+          onChanged();
+        } else {
+          pendingKeyExchangeBuilder_.setMessage(value);
+        }
+        bitField0_ |= 0x00000080;
+        return this;
+      }
+      /**
+       * <code>optional .textsecure.SessionStructure.PendingKeyExchange pendingKeyExchange = 8;</code>
+       */
+      public Builder setPendingKeyExchange(
+          org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange.Builder builderForValue) {
+        if (pendingKeyExchangeBuilder_ == null) {
+          pendingKeyExchange_ = builderForValue.build();
+          onChanged();
+        } else {
+          pendingKeyExchangeBuilder_.setMessage(builderForValue.build());
+        }
+        bitField0_ |= 0x00000080;
+        return this;
+      }
+      /**
+       * <code>optional .textsecure.SessionStructure.PendingKeyExchange pendingKeyExchange = 8;</code>
+       */
+      public Builder mergePendingKeyExchange(org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange value) {
+        if (pendingKeyExchangeBuilder_ == null) {
+          if (((bitField0_ & 0x00000080) == 0x00000080) &&
+              pendingKeyExchange_ != org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange.getDefaultInstance()) {
+            pendingKeyExchange_ =
+              org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange.newBuilder(pendingKeyExchange_).mergeFrom(value).buildPartial();
+          } else {
+            pendingKeyExchange_ = value;
+          }
+          onChanged();
+        } else {
+          pendingKeyExchangeBuilder_.mergeFrom(value);
+        }
+        bitField0_ |= 0x00000080;
+        return this;
+      }
+      /**
+       * <code>optional .textsecure.SessionStructure.PendingKeyExchange pendingKeyExchange = 8;</code>
+       */
+      public Builder clearPendingKeyExchange() {
+        if (pendingKeyExchangeBuilder_ == null) {
+          pendingKeyExchange_ = org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange.getDefaultInstance();
+          onChanged();
+        } else {
+          pendingKeyExchangeBuilder_.clear();
+        }
+        bitField0_ = (bitField0_ & ~0x00000080);
+        return this;
+      }
+      /**
+       * <code>optional .textsecure.SessionStructure.PendingKeyExchange pendingKeyExchange = 8;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange.Builder getPendingKeyExchangeBuilder() {
+        bitField0_ |= 0x00000080;
+        onChanged();
+        return getPendingKeyExchangeFieldBuilder().getBuilder();
+      }
+      /**
+       * <code>optional .textsecure.SessionStructure.PendingKeyExchange pendingKeyExchange = 8;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchangeOrBuilder getPendingKeyExchangeOrBuilder() {
+        if (pendingKeyExchangeBuilder_ != null) {
+          return pendingKeyExchangeBuilder_.getMessageOrBuilder();
+        } else {
+          return pendingKeyExchange_;
+        }
+      }
+      /**
+       * <code>optional .textsecure.SessionStructure.PendingKeyExchange pendingKeyExchange = 8;</code>
+       */
+      private com.google.protobuf.SingleFieldBuilder<
+          org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchangeOrBuilder> 
+          getPendingKeyExchangeFieldBuilder() {
+        if (pendingKeyExchangeBuilder_ == null) {
+          pendingKeyExchangeBuilder_ = new com.google.protobuf.SingleFieldBuilder<
+              org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchange.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingKeyExchangeOrBuilder>(
+                  pendingKeyExchange_,
+                  getParentForChildren(),
+                  isClean());
+          pendingKeyExchange_ = null;
+        }
+        return pendingKeyExchangeBuilder_;
+      }
+
+      // optional .textsecure.SessionStructure.PendingPreKey pendingPreKey = 9;
+      private org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey pendingPreKey_ = org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey.getDefaultInstance();
+      private com.google.protobuf.SingleFieldBuilder<
+          org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKeyOrBuilder> pendingPreKeyBuilder_;
+      /**
+       * <code>optional .textsecure.SessionStructure.PendingPreKey pendingPreKey = 9;</code>
+       */
+      public boolean hasPendingPreKey() {
+        return ((bitField0_ & 0x00000100) == 0x00000100);
+      }
+      /**
+       * <code>optional .textsecure.SessionStructure.PendingPreKey pendingPreKey = 9;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey getPendingPreKey() {
+        if (pendingPreKeyBuilder_ == null) {
+          return pendingPreKey_;
+        } else {
+          return pendingPreKeyBuilder_.getMessage();
+        }
+      }
+      /**
+       * <code>optional .textsecure.SessionStructure.PendingPreKey pendingPreKey = 9;</code>
+       */
+      public Builder setPendingPreKey(org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey value) {
+        if (pendingPreKeyBuilder_ == null) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          pendingPreKey_ = value;
+          onChanged();
+        } else {
+          pendingPreKeyBuilder_.setMessage(value);
+        }
+        bitField0_ |= 0x00000100;
+        return this;
+      }
+      /**
+       * <code>optional .textsecure.SessionStructure.PendingPreKey pendingPreKey = 9;</code>
+       */
+      public Builder setPendingPreKey(
+          org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey.Builder builderForValue) {
+        if (pendingPreKeyBuilder_ == null) {
+          pendingPreKey_ = builderForValue.build();
+          onChanged();
+        } else {
+          pendingPreKeyBuilder_.setMessage(builderForValue.build());
+        }
+        bitField0_ |= 0x00000100;
+        return this;
+      }
+      /**
+       * <code>optional .textsecure.SessionStructure.PendingPreKey pendingPreKey = 9;</code>
+       */
+      public Builder mergePendingPreKey(org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey value) {
+        if (pendingPreKeyBuilder_ == null) {
+          if (((bitField0_ & 0x00000100) == 0x00000100) &&
+              pendingPreKey_ != org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey.getDefaultInstance()) {
+            pendingPreKey_ =
+              org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey.newBuilder(pendingPreKey_).mergeFrom(value).buildPartial();
+          } else {
+            pendingPreKey_ = value;
+          }
+          onChanged();
+        } else {
+          pendingPreKeyBuilder_.mergeFrom(value);
+        }
+        bitField0_ |= 0x00000100;
+        return this;
+      }
+      /**
+       * <code>optional .textsecure.SessionStructure.PendingPreKey pendingPreKey = 9;</code>
+       */
+      public Builder clearPendingPreKey() {
+        if (pendingPreKeyBuilder_ == null) {
+          pendingPreKey_ = org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey.getDefaultInstance();
+          onChanged();
+        } else {
+          pendingPreKeyBuilder_.clear();
+        }
+        bitField0_ = (bitField0_ & ~0x00000100);
+        return this;
+      }
+      /**
+       * <code>optional .textsecure.SessionStructure.PendingPreKey pendingPreKey = 9;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey.Builder getPendingPreKeyBuilder() {
+        bitField0_ |= 0x00000100;
+        onChanged();
+        return getPendingPreKeyFieldBuilder().getBuilder();
+      }
+      /**
+       * <code>optional .textsecure.SessionStructure.PendingPreKey pendingPreKey = 9;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKeyOrBuilder getPendingPreKeyOrBuilder() {
+        if (pendingPreKeyBuilder_ != null) {
+          return pendingPreKeyBuilder_.getMessageOrBuilder();
+        } else {
+          return pendingPreKey_;
+        }
+      }
+      /**
+       * <code>optional .textsecure.SessionStructure.PendingPreKey pendingPreKey = 9;</code>
+       */
+      private com.google.protobuf.SingleFieldBuilder<
+          org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKeyOrBuilder> 
+          getPendingPreKeyFieldBuilder() {
+        if (pendingPreKeyBuilder_ == null) {
+          pendingPreKeyBuilder_ = new com.google.protobuf.SingleFieldBuilder<
+              org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKey.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PendingPreKeyOrBuilder>(
+                  pendingPreKey_,
+                  getParentForChildren(),
+                  isClean());
+          pendingPreKey_ = null;
+        }
+        return pendingPreKeyBuilder_;
+      }
+
+      // optional uint32 remoteRegistrationId = 10;
+      private int remoteRegistrationId_ ;
+      /**
+       * <code>optional uint32 remoteRegistrationId = 10;</code>
+       */
+      public boolean hasRemoteRegistrationId() {
+        return ((bitField0_ & 0x00000200) == 0x00000200);
+      }
+      /**
+       * <code>optional uint32 remoteRegistrationId = 10;</code>
+       */
+      public int getRemoteRegistrationId() {
+        return remoteRegistrationId_;
+      }
+      /**
+       * <code>optional uint32 remoteRegistrationId = 10;</code>
+       */
+      public Builder setRemoteRegistrationId(int value) {
+        bitField0_ |= 0x00000200;
+        remoteRegistrationId_ = value;
+        onChanged();
+        return this;
+      }
+      /**
+       * <code>optional uint32 remoteRegistrationId = 10;</code>
+       */
+      public Builder clearRemoteRegistrationId() {
+        bitField0_ = (bitField0_ & ~0x00000200);
+        remoteRegistrationId_ = 0;
+        onChanged();
+        return this;
+      }
+
+      // optional uint32 localRegistrationId = 11;
+      private int localRegistrationId_ ;
+      /**
+       * <code>optional uint32 localRegistrationId = 11;</code>
+       */
+      public boolean hasLocalRegistrationId() {
+        return ((bitField0_ & 0x00000400) == 0x00000400);
+      }
+      /**
+       * <code>optional uint32 localRegistrationId = 11;</code>
+       */
+      public int getLocalRegistrationId() {
+        return localRegistrationId_;
+      }
+      /**
+       * <code>optional uint32 localRegistrationId = 11;</code>
+       */
+      public Builder setLocalRegistrationId(int value) {
+        bitField0_ |= 0x00000400;
+        localRegistrationId_ = value;
+        onChanged();
+        return this;
+      }
+      /**
+       * <code>optional uint32 localRegistrationId = 11;</code>
+       */
+      public Builder clearLocalRegistrationId() {
+        bitField0_ = (bitField0_ & ~0x00000400);
+        localRegistrationId_ = 0;
+        onChanged();
+        return this;
+      }
+
+      // optional bool needsRefresh = 12;
+      private boolean needsRefresh_ ;
+      /**
+       * <code>optional bool needsRefresh = 12;</code>
+       */
+      public boolean hasNeedsRefresh() {
+        return ((bitField0_ & 0x00000800) == 0x00000800);
+      }
+      /**
+       * <code>optional bool needsRefresh = 12;</code>
+       */
+      public boolean getNeedsRefresh() {
+        return needsRefresh_;
+      }
+      /**
+       * <code>optional bool needsRefresh = 12;</code>
+       */
+      public Builder setNeedsRefresh(boolean value) {
+        bitField0_ |= 0x00000800;
+        needsRefresh_ = value;
+        onChanged();
+        return this;
+      }
+      /**
+       * <code>optional bool needsRefresh = 12;</code>
+       */
+      public Builder clearNeedsRefresh() {
+        bitField0_ = (bitField0_ & ~0x00000800);
+        needsRefresh_ = false;
+        onChanged();
+        return this;
+      }
+
+      // optional bytes aliceBaseKey = 13;
+      private com.google.protobuf.ByteString aliceBaseKey_ = com.google.protobuf.ByteString.EMPTY;
+      /**
+       * <code>optional bytes aliceBaseKey = 13;</code>
+       */
+      public boolean hasAliceBaseKey() {
+        return ((bitField0_ & 0x00001000) == 0x00001000);
+      }
+      /**
+       * <code>optional bytes aliceBaseKey = 13;</code>
+       */
+      public com.google.protobuf.ByteString getAliceBaseKey() {
+        return aliceBaseKey_;
+      }
+      /**
+       * <code>optional bytes aliceBaseKey = 13;</code>
+       */
+      public Builder setAliceBaseKey(com.google.protobuf.ByteString value) {
+        if (value == null) {
+    throw new NullPointerException();
+  }
+  bitField0_ |= 0x00001000;
+        aliceBaseKey_ = value;
+        onChanged();
+        return this;
+      }
+      /**
+       * <code>optional bytes aliceBaseKey = 13;</code>
+       */
+      public Builder clearAliceBaseKey() {
+        bitField0_ = (bitField0_ & ~0x00001000);
+        aliceBaseKey_ = getDefaultInstance().getAliceBaseKey();
+        onChanged();
+        return this;
+      }
+
+      // @@protoc_insertion_point(builder_scope:textsecure.SessionStructure)
+    }
+
+    static {
+      defaultInstance = new SessionStructure(true);
+      defaultInstance.initFields();
+    }
+
+    // @@protoc_insertion_point(class_scope:textsecure.SessionStructure)
+  }
+
+  public interface RecordStructureOrBuilder
+      extends com.google.protobuf.MessageOrBuilder {
+
+    // optional .textsecure.SessionStructure currentSession = 1;
+    /**
+     * <code>optional .textsecure.SessionStructure currentSession = 1;</code>
+     */
+    boolean hasCurrentSession();
+    /**
+     * <code>optional .textsecure.SessionStructure currentSession = 1;</code>
+     */
+    org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure getCurrentSession();
+    /**
+     * <code>optional .textsecure.SessionStructure currentSession = 1;</code>
+     */
+    org.whispersystems.libaxolotl.state.StorageProtos.SessionStructureOrBuilder getCurrentSessionOrBuilder();
+
+    // repeated .textsecure.SessionStructure previousSessions = 2;
+    /**
+     * <code>repeated .textsecure.SessionStructure previousSessions = 2;</code>
+     */
+    java.util.List<org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure> 
+        getPreviousSessionsList();
+    /**
+     * <code>repeated .textsecure.SessionStructure previousSessions = 2;</code>
+     */
+    org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure getPreviousSessions(int index);
+    /**
+     * <code>repeated .textsecure.SessionStructure previousSessions = 2;</code>
+     */
+    int getPreviousSessionsCount();
+    /**
+     * <code>repeated .textsecure.SessionStructure previousSessions = 2;</code>
+     */
+    java.util.List<? extends org.whispersystems.libaxolotl.state.StorageProtos.SessionStructureOrBuilder> 
+        getPreviousSessionsOrBuilderList();
+    /**
+     * <code>repeated .textsecure.SessionStructure previousSessions = 2;</code>
+     */
+    org.whispersystems.libaxolotl.state.StorageProtos.SessionStructureOrBuilder getPreviousSessionsOrBuilder(
+        int index);
+  }
+  /**
+   * Protobuf type {@code textsecure.RecordStructure}
+   */
+  public static final class RecordStructure extends
+      com.google.protobuf.GeneratedMessage
+      implements RecordStructureOrBuilder {
+    // Use RecordStructure.newBuilder() to construct.
+    private RecordStructure(com.google.protobuf.GeneratedMessage.Builder<?> builder) {
+      super(builder);
+      this.unknownFields = builder.getUnknownFields();
+    }
+    private RecordStructure(boolean noInit) { this.unknownFields = com.google.protobuf.UnknownFieldSet.getDefaultInstance(); }
+
+    private static final RecordStructure defaultInstance;
+    public static RecordStructure getDefaultInstance() {
+      return defaultInstance;
+    }
+
+    public RecordStructure getDefaultInstanceForType() {
+      return defaultInstance;
+    }
+
+    private final com.google.protobuf.UnknownFieldSet unknownFields;
+    @java.lang.Override
+    public final com.google.protobuf.UnknownFieldSet
+        getUnknownFields() {
+      return this.unknownFields;
+    }
+    private RecordStructure(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      initFields();
+      int mutable_bitField0_ = 0;
+      com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+          com.google.protobuf.UnknownFieldSet.newBuilder();
+      try {
+        boolean done = false;
+        while (!done) {
+          int tag = input.readTag();
+          switch (tag) {
+            case 0:
+              done = true;
+              break;
+            default: {
+              if (!parseUnknownField(input, unknownFields,
+                                     extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+            case 10: {
+              org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Builder subBuilder = null;
+              if (((bitField0_ & 0x00000001) == 0x00000001)) {
+                subBuilder = currentSession_.toBuilder();
+              }
+              currentSession_ = input.readMessage(org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PARSER, extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(currentSession_);
+                currentSession_ = subBuilder.buildPartial();
+              }
+              bitField0_ |= 0x00000001;
+              break;
+            }
+            case 18: {
+              if (!((mutable_bitField0_ & 0x00000002) == 0x00000002)) {
+                previousSessions_ = new java.util.ArrayList<org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure>();
+                mutable_bitField0_ |= 0x00000002;
+              }
+              previousSessions_.add(input.readMessage(org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.PARSER, extensionRegistry));
+              break;
+            }
+          }
+        }
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        throw e.setUnfinishedMessage(this);
+      } catch (java.io.IOException e) {
+        throw new com.google.protobuf.InvalidProtocolBufferException(
+            e.getMessage()).setUnfinishedMessage(this);
+      } finally {
+        if (((mutable_bitField0_ & 0x00000002) == 0x00000002)) {
+          previousSessions_ = java.util.Collections.unmodifiableList(previousSessions_);
+        }
+        this.unknownFields = unknownFields.build();
+        makeExtensionsImmutable();
+      }
+    }
+    public static final com.google.protobuf.Descriptors.Descriptor
+        getDescriptor() {
+      return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_RecordStructure_descriptor;
+    }
+
+    protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_RecordStructure_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              org.whispersystems.libaxolotl.state.StorageProtos.RecordStructure.class, org.whispersystems.libaxolotl.state.StorageProtos.RecordStructure.Builder.class);
+    }
+
+    public static com.google.protobuf.Parser<RecordStructure> PARSER =
+        new com.google.protobuf.AbstractParser<RecordStructure>() {
+      public RecordStructure parsePartialFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return new RecordStructure(input, extensionRegistry);
+      }
+    };
+
+    @java.lang.Override
+    public com.google.protobuf.Parser<RecordStructure> getParserForType() {
+      return PARSER;
+    }
+
+    private int bitField0_;
+    // optional .textsecure.SessionStructure currentSession = 1;
+    public static final int CURRENTSESSION_FIELD_NUMBER = 1;
+    private org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure currentSession_;
+    /**
+     * <code>optional .textsecure.SessionStructure currentSession = 1;</code>
+     */
+    public boolean hasCurrentSession() {
+      return ((bitField0_ & 0x00000001) == 0x00000001);
+    }
+    /**
+     * <code>optional .textsecure.SessionStructure currentSession = 1;</code>
+     */
+    public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure getCurrentSession() {
+      return currentSession_;
+    }
+    /**
+     * <code>optional .textsecure.SessionStructure currentSession = 1;</code>
+     */
+    public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructureOrBuilder getCurrentSessionOrBuilder() {
+      return currentSession_;
+    }
+
+    // repeated .textsecure.SessionStructure previousSessions = 2;
+    public static final int PREVIOUSSESSIONS_FIELD_NUMBER = 2;
+    private java.util.List<org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure> previousSessions_;
+    /**
+     * <code>repeated .textsecure.SessionStructure previousSessions = 2;</code>
+     */
+    public java.util.List<org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure> getPreviousSessionsList() {
+      return previousSessions_;
+    }
+    /**
+     * <code>repeated .textsecure.SessionStructure previousSessions = 2;</code>
+     */
+    public java.util.List<? extends org.whispersystems.libaxolotl.state.StorageProtos.SessionStructureOrBuilder> 
+        getPreviousSessionsOrBuilderList() {
+      return previousSessions_;
+    }
+    /**
+     * <code>repeated .textsecure.SessionStructure previousSessions = 2;</code>
+     */
+    public int getPreviousSessionsCount() {
+      return previousSessions_.size();
+    }
+    /**
+     * <code>repeated .textsecure.SessionStructure previousSessions = 2;</code>
+     */
+    public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure getPreviousSessions(int index) {
+      return previousSessions_.get(index);
+    }
+    /**
+     * <code>repeated .textsecure.SessionStructure previousSessions = 2;</code>
+     */
+    public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructureOrBuilder getPreviousSessionsOrBuilder(
+        int index) {
+      return previousSessions_.get(index);
+    }
+
+    private void initFields() {
+      currentSession_ = org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.getDefaultInstance();
+      previousSessions_ = java.util.Collections.emptyList();
+    }
+    private byte memoizedIsInitialized = -1;
+    public final boolean isInitialized() {
+      byte isInitialized = memoizedIsInitialized;
+      if (isInitialized != -1) return isInitialized == 1;
+
+      memoizedIsInitialized = 1;
+      return true;
+    }
+
+    public void writeTo(com.google.protobuf.CodedOutputStream output)
+                        throws java.io.IOException {
+      getSerializedSize();
+      if (((bitField0_ & 0x00000001) == 0x00000001)) {
+        output.writeMessage(1, currentSession_);
+      }
+      for (int i = 0; i < previousSessions_.size(); i++) {
+        output.writeMessage(2, previousSessions_.get(i));
+      }
+      getUnknownFields().writeTo(output);
+    }
+
+    private int memoizedSerializedSize = -1;
+    public int getSerializedSize() {
+      int size = memoizedSerializedSize;
+      if (size != -1) return size;
+
+      size = 0;
+      if (((bitField0_ & 0x00000001) == 0x00000001)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeMessageSize(1, currentSession_);
+      }
+      for (int i = 0; i < previousSessions_.size(); i++) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeMessageSize(2, previousSessions_.get(i));
+      }
+      size += getUnknownFields().getSerializedSize();
+      memoizedSerializedSize = size;
+      return size;
+    }
+
+    private static final long serialVersionUID = 0L;
+    @java.lang.Override
+    protected java.lang.Object writeReplace()
+        throws java.io.ObjectStreamException {
+      return super.writeReplace();
+    }
+
+    public static org.whispersystems.libaxolotl.state.StorageProtos.RecordStructure parseFrom(
+        com.google.protobuf.ByteString data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.RecordStructure parseFrom(
+        com.google.protobuf.ByteString data,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data, extensionRegistry);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.RecordStructure parseFrom(byte[] data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.RecordStructure parseFrom(
+        byte[] data,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data, extensionRegistry);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.RecordStructure parseFrom(java.io.InputStream input)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.RecordStructure parseFrom(
+        java.io.InputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input, extensionRegistry);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.RecordStructure parseDelimitedFrom(java.io.InputStream input)
+        throws java.io.IOException {
+      return PARSER.parseDelimitedFrom(input);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.RecordStructure parseDelimitedFrom(
+        java.io.InputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return PARSER.parseDelimitedFrom(input, extensionRegistry);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.RecordStructure parseFrom(
+        com.google.protobuf.CodedInputStream input)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.RecordStructure parseFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input, extensionRegistry);
+    }
+
+    public static Builder newBuilder() { return Builder.create(); }
+    public Builder newBuilderForType() { return newBuilder(); }
+    public static Builder newBuilder(org.whispersystems.libaxolotl.state.StorageProtos.RecordStructure prototype) {
+      return newBuilder().mergeFrom(prototype);
+    }
+    public Builder toBuilder() { return newBuilder(this); }
+
+    @java.lang.Override
+    protected Builder newBuilderForType(
+        com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+      Builder builder = new Builder(parent);
+      return builder;
+    }
+    /**
+     * Protobuf type {@code textsecure.RecordStructure}
+     */
+    public static final class Builder extends
+        com.google.protobuf.GeneratedMessage.Builder<Builder>
+       implements org.whispersystems.libaxolotl.state.StorageProtos.RecordStructureOrBuilder {
+      public static final com.google.protobuf.Descriptors.Descriptor
+          getDescriptor() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_RecordStructure_descriptor;
+      }
+
+      protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+          internalGetFieldAccessorTable() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_RecordStructure_fieldAccessorTable
+            .ensureFieldAccessorsInitialized(
+                org.whispersystems.libaxolotl.state.StorageProtos.RecordStructure.class, org.whispersystems.libaxolotl.state.StorageProtos.RecordStructure.Builder.class);
+      }
+
+      // Construct using org.whispersystems.libaxolotl.state.StorageProtos.RecordStructure.newBuilder()
+      private Builder() {
+        maybeForceBuilderInitialization();
+      }
+
+      private Builder(
+          com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+        super(parent);
+        maybeForceBuilderInitialization();
+      }
+      private void maybeForceBuilderInitialization() {
+        if (com.google.protobuf.GeneratedMessage.alwaysUseFieldBuilders) {
+          getCurrentSessionFieldBuilder();
+          getPreviousSessionsFieldBuilder();
+        }
+      }
+      private static Builder create() {
+        return new Builder();
+      }
+
+      public Builder clear() {
+        super.clear();
+        if (currentSessionBuilder_ == null) {
+          currentSession_ = org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.getDefaultInstance();
+        } else {
+          currentSessionBuilder_.clear();
+        }
+        bitField0_ = (bitField0_ & ~0x00000001);
+        if (previousSessionsBuilder_ == null) {
+          previousSessions_ = java.util.Collections.emptyList();
+          bitField0_ = (bitField0_ & ~0x00000002);
+        } else {
+          previousSessionsBuilder_.clear();
+        }
+        return this;
+      }
+
+      public Builder clone() {
+        return create().mergeFrom(buildPartial());
+      }
+
+      public com.google.protobuf.Descriptors.Descriptor
+          getDescriptorForType() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_RecordStructure_descriptor;
+      }
+
+      public org.whispersystems.libaxolotl.state.StorageProtos.RecordStructure getDefaultInstanceForType() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.RecordStructure.getDefaultInstance();
+      }
+
+      public org.whispersystems.libaxolotl.state.StorageProtos.RecordStructure build() {
+        org.whispersystems.libaxolotl.state.StorageProtos.RecordStructure result = buildPartial();
+        if (!result.isInitialized()) {
+          throw newUninitializedMessageException(result);
+        }
+        return result;
+      }
+
+      public org.whispersystems.libaxolotl.state.StorageProtos.RecordStructure buildPartial() {
+        org.whispersystems.libaxolotl.state.StorageProtos.RecordStructure result = new org.whispersystems.libaxolotl.state.StorageProtos.RecordStructure(this);
+        int from_bitField0_ = bitField0_;
+        int to_bitField0_ = 0;
+        if (((from_bitField0_ & 0x00000001) == 0x00000001)) {
+          to_bitField0_ |= 0x00000001;
+        }
+        if (currentSessionBuilder_ == null) {
+          result.currentSession_ = currentSession_;
+        } else {
+          result.currentSession_ = currentSessionBuilder_.build();
+        }
+        if (previousSessionsBuilder_ == null) {
+          if (((bitField0_ & 0x00000002) == 0x00000002)) {
+            previousSessions_ = java.util.Collections.unmodifiableList(previousSessions_);
+            bitField0_ = (bitField0_ & ~0x00000002);
+          }
+          result.previousSessions_ = previousSessions_;
+        } else {
+          result.previousSessions_ = previousSessionsBuilder_.build();
+        }
+        result.bitField0_ = to_bitField0_;
+        onBuilt();
+        return result;
+      }
+
+      public Builder mergeFrom(com.google.protobuf.Message other) {
+        if (other instanceof org.whispersystems.libaxolotl.state.StorageProtos.RecordStructure) {
+          return mergeFrom((org.whispersystems.libaxolotl.state.StorageProtos.RecordStructure)other);
+        } else {
+          super.mergeFrom(other);
+          return this;
+        }
+      }
+
+      public Builder mergeFrom(org.whispersystems.libaxolotl.state.StorageProtos.RecordStructure other) {
+        if (other == org.whispersystems.libaxolotl.state.StorageProtos.RecordStructure.getDefaultInstance()) return this;
+        if (other.hasCurrentSession()) {
+          mergeCurrentSession(other.getCurrentSession());
+        }
+        if (previousSessionsBuilder_ == null) {
+          if (!other.previousSessions_.isEmpty()) {
+            if (previousSessions_.isEmpty()) {
+              previousSessions_ = other.previousSessions_;
+              bitField0_ = (bitField0_ & ~0x00000002);
+            } else {
+              ensurePreviousSessionsIsMutable();
+              previousSessions_.addAll(other.previousSessions_);
+            }
+            onChanged();
+          }
+        } else {
+          if (!other.previousSessions_.isEmpty()) {
+            if (previousSessionsBuilder_.isEmpty()) {
+              previousSessionsBuilder_.dispose();
+              previousSessionsBuilder_ = null;
+              previousSessions_ = other.previousSessions_;
+              bitField0_ = (bitField0_ & ~0x00000002);
+              previousSessionsBuilder_ = 
+                com.google.protobuf.GeneratedMessage.alwaysUseFieldBuilders ?
+                   getPreviousSessionsFieldBuilder() : null;
+            } else {
+              previousSessionsBuilder_.addAllMessages(other.previousSessions_);
+            }
+          }
+        }
+        this.mergeUnknownFields(other.getUnknownFields());
+        return this;
+      }
+
+      public final boolean isInitialized() {
+        return true;
+      }
+
+      public Builder mergeFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        org.whispersystems.libaxolotl.state.StorageProtos.RecordStructure parsedMessage = null;
+        try {
+          parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+        } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+          parsedMessage = (org.whispersystems.libaxolotl.state.StorageProtos.RecordStructure) e.getUnfinishedMessage();
+          throw e;
+        } finally {
+          if (parsedMessage != null) {
+            mergeFrom(parsedMessage);
+          }
+        }
+        return this;
+      }
+      private int bitField0_;
+
+      // optional .textsecure.SessionStructure currentSession = 1;
+      private org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure currentSession_ = org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.getDefaultInstance();
+      private com.google.protobuf.SingleFieldBuilder<
+          org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructureOrBuilder> currentSessionBuilder_;
+      /**
+       * <code>optional .textsecure.SessionStructure currentSession = 1;</code>
+       */
+      public boolean hasCurrentSession() {
+        return ((bitField0_ & 0x00000001) == 0x00000001);
+      }
+      /**
+       * <code>optional .textsecure.SessionStructure currentSession = 1;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure getCurrentSession() {
+        if (currentSessionBuilder_ == null) {
+          return currentSession_;
+        } else {
+          return currentSessionBuilder_.getMessage();
+        }
+      }
+      /**
+       * <code>optional .textsecure.SessionStructure currentSession = 1;</code>
+       */
+      public Builder setCurrentSession(org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure value) {
+        if (currentSessionBuilder_ == null) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          currentSession_ = value;
+          onChanged();
+        } else {
+          currentSessionBuilder_.setMessage(value);
+        }
+        bitField0_ |= 0x00000001;
+        return this;
+      }
+      /**
+       * <code>optional .textsecure.SessionStructure currentSession = 1;</code>
+       */
+      public Builder setCurrentSession(
+          org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Builder builderForValue) {
+        if (currentSessionBuilder_ == null) {
+          currentSession_ = builderForValue.build();
+          onChanged();
+        } else {
+          currentSessionBuilder_.setMessage(builderForValue.build());
+        }
+        bitField0_ |= 0x00000001;
+        return this;
+      }
+      /**
+       * <code>optional .textsecure.SessionStructure currentSession = 1;</code>
+       */
+      public Builder mergeCurrentSession(org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure value) {
+        if (currentSessionBuilder_ == null) {
+          if (((bitField0_ & 0x00000001) == 0x00000001) &&
+              currentSession_ != org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.getDefaultInstance()) {
+            currentSession_ =
+              org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.newBuilder(currentSession_).mergeFrom(value).buildPartial();
+          } else {
+            currentSession_ = value;
+          }
+          onChanged();
+        } else {
+          currentSessionBuilder_.mergeFrom(value);
+        }
+        bitField0_ |= 0x00000001;
+        return this;
+      }
+      /**
+       * <code>optional .textsecure.SessionStructure currentSession = 1;</code>
+       */
+      public Builder clearCurrentSession() {
+        if (currentSessionBuilder_ == null) {
+          currentSession_ = org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.getDefaultInstance();
+          onChanged();
+        } else {
+          currentSessionBuilder_.clear();
+        }
+        bitField0_ = (bitField0_ & ~0x00000001);
+        return this;
+      }
+      /**
+       * <code>optional .textsecure.SessionStructure currentSession = 1;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Builder getCurrentSessionBuilder() {
+        bitField0_ |= 0x00000001;
+        onChanged();
+        return getCurrentSessionFieldBuilder().getBuilder();
+      }
+      /**
+       * <code>optional .textsecure.SessionStructure currentSession = 1;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructureOrBuilder getCurrentSessionOrBuilder() {
+        if (currentSessionBuilder_ != null) {
+          return currentSessionBuilder_.getMessageOrBuilder();
+        } else {
+          return currentSession_;
+        }
+      }
+      /**
+       * <code>optional .textsecure.SessionStructure currentSession = 1;</code>
+       */
+      private com.google.protobuf.SingleFieldBuilder<
+          org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructureOrBuilder> 
+          getCurrentSessionFieldBuilder() {
+        if (currentSessionBuilder_ == null) {
+          currentSessionBuilder_ = new com.google.protobuf.SingleFieldBuilder<
+              org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructureOrBuilder>(
+                  currentSession_,
+                  getParentForChildren(),
+                  isClean());
+          currentSession_ = null;
+        }
+        return currentSessionBuilder_;
+      }
+
+      // repeated .textsecure.SessionStructure previousSessions = 2;
+      private java.util.List<org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure> previousSessions_ =
+        java.util.Collections.emptyList();
+      private void ensurePreviousSessionsIsMutable() {
+        if (!((bitField0_ & 0x00000002) == 0x00000002)) {
+          previousSessions_ = new java.util.ArrayList<org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure>(previousSessions_);
+          bitField0_ |= 0x00000002;
+         }
+      }
+
+      private com.google.protobuf.RepeatedFieldBuilder<
+          org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructureOrBuilder> previousSessionsBuilder_;
+
+      /**
+       * <code>repeated .textsecure.SessionStructure previousSessions = 2;</code>
+       */
+      public java.util.List<org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure> getPreviousSessionsList() {
+        if (previousSessionsBuilder_ == null) {
+          return java.util.Collections.unmodifiableList(previousSessions_);
+        } else {
+          return previousSessionsBuilder_.getMessageList();
+        }
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure previousSessions = 2;</code>
+       */
+      public int getPreviousSessionsCount() {
+        if (previousSessionsBuilder_ == null) {
+          return previousSessions_.size();
+        } else {
+          return previousSessionsBuilder_.getCount();
+        }
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure previousSessions = 2;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure getPreviousSessions(int index) {
+        if (previousSessionsBuilder_ == null) {
+          return previousSessions_.get(index);
+        } else {
+          return previousSessionsBuilder_.getMessage(index);
+        }
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure previousSessions = 2;</code>
+       */
+      public Builder setPreviousSessions(
+          int index, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure value) {
+        if (previousSessionsBuilder_ == null) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          ensurePreviousSessionsIsMutable();
+          previousSessions_.set(index, value);
+          onChanged();
+        } else {
+          previousSessionsBuilder_.setMessage(index, value);
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure previousSessions = 2;</code>
+       */
+      public Builder setPreviousSessions(
+          int index, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Builder builderForValue) {
+        if (previousSessionsBuilder_ == null) {
+          ensurePreviousSessionsIsMutable();
+          previousSessions_.set(index, builderForValue.build());
+          onChanged();
+        } else {
+          previousSessionsBuilder_.setMessage(index, builderForValue.build());
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure previousSessions = 2;</code>
+       */
+      public Builder addPreviousSessions(org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure value) {
+        if (previousSessionsBuilder_ == null) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          ensurePreviousSessionsIsMutable();
+          previousSessions_.add(value);
+          onChanged();
+        } else {
+          previousSessionsBuilder_.addMessage(value);
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure previousSessions = 2;</code>
+       */
+      public Builder addPreviousSessions(
+          int index, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure value) {
+        if (previousSessionsBuilder_ == null) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          ensurePreviousSessionsIsMutable();
+          previousSessions_.add(index, value);
+          onChanged();
+        } else {
+          previousSessionsBuilder_.addMessage(index, value);
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure previousSessions = 2;</code>
+       */
+      public Builder addPreviousSessions(
+          org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Builder builderForValue) {
+        if (previousSessionsBuilder_ == null) {
+          ensurePreviousSessionsIsMutable();
+          previousSessions_.add(builderForValue.build());
+          onChanged();
+        } else {
+          previousSessionsBuilder_.addMessage(builderForValue.build());
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure previousSessions = 2;</code>
+       */
+      public Builder addPreviousSessions(
+          int index, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Builder builderForValue) {
+        if (previousSessionsBuilder_ == null) {
+          ensurePreviousSessionsIsMutable();
+          previousSessions_.add(index, builderForValue.build());
+          onChanged();
+        } else {
+          previousSessionsBuilder_.addMessage(index, builderForValue.build());
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure previousSessions = 2;</code>
+       */
+      public Builder addAllPreviousSessions(
+          java.lang.Iterable<? extends org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure> values) {
+        if (previousSessionsBuilder_ == null) {
+          ensurePreviousSessionsIsMutable();
+          super.addAll(values, previousSessions_);
+          onChanged();
+        } else {
+          previousSessionsBuilder_.addAllMessages(values);
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure previousSessions = 2;</code>
+       */
+      public Builder clearPreviousSessions() {
+        if (previousSessionsBuilder_ == null) {
+          previousSessions_ = java.util.Collections.emptyList();
+          bitField0_ = (bitField0_ & ~0x00000002);
+          onChanged();
+        } else {
+          previousSessionsBuilder_.clear();
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure previousSessions = 2;</code>
+       */
+      public Builder removePreviousSessions(int index) {
+        if (previousSessionsBuilder_ == null) {
+          ensurePreviousSessionsIsMutable();
+          previousSessions_.remove(index);
+          onChanged();
+        } else {
+          previousSessionsBuilder_.remove(index);
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure previousSessions = 2;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Builder getPreviousSessionsBuilder(
+          int index) {
+        return getPreviousSessionsFieldBuilder().getBuilder(index);
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure previousSessions = 2;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructureOrBuilder getPreviousSessionsOrBuilder(
+          int index) {
+        if (previousSessionsBuilder_ == null) {
+          return previousSessions_.get(index);  } else {
+          return previousSessionsBuilder_.getMessageOrBuilder(index);
+        }
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure previousSessions = 2;</code>
+       */
+      public java.util.List<? extends org.whispersystems.libaxolotl.state.StorageProtos.SessionStructureOrBuilder> 
+           getPreviousSessionsOrBuilderList() {
+        if (previousSessionsBuilder_ != null) {
+          return previousSessionsBuilder_.getMessageOrBuilderList();
+        } else {
+          return java.util.Collections.unmodifiableList(previousSessions_);
+        }
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure previousSessions = 2;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Builder addPreviousSessionsBuilder() {
+        return getPreviousSessionsFieldBuilder().addBuilder(
+            org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.getDefaultInstance());
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure previousSessions = 2;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Builder addPreviousSessionsBuilder(
+          int index) {
+        return getPreviousSessionsFieldBuilder().addBuilder(
+            index, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.getDefaultInstance());
+      }
+      /**
+       * <code>repeated .textsecure.SessionStructure previousSessions = 2;</code>
+       */
+      public java.util.List<org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Builder> 
+           getPreviousSessionsBuilderList() {
+        return getPreviousSessionsFieldBuilder().getBuilderList();
+      }
+      private com.google.protobuf.RepeatedFieldBuilder<
+          org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructureOrBuilder> 
+          getPreviousSessionsFieldBuilder() {
+        if (previousSessionsBuilder_ == null) {
+          previousSessionsBuilder_ = new com.google.protobuf.RepeatedFieldBuilder<
+              org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructure.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SessionStructureOrBuilder>(
+                  previousSessions_,
+                  ((bitField0_ & 0x00000002) == 0x00000002),
+                  getParentForChildren(),
+                  isClean());
+          previousSessions_ = null;
+        }
+        return previousSessionsBuilder_;
+      }
+
+      // @@protoc_insertion_point(builder_scope:textsecure.RecordStructure)
+    }
+
+    static {
+      defaultInstance = new RecordStructure(true);
+      defaultInstance.initFields();
+    }
+
+    // @@protoc_insertion_point(class_scope:textsecure.RecordStructure)
+  }
+
+  public interface PreKeyRecordStructureOrBuilder
+      extends com.google.protobuf.MessageOrBuilder {
+
+    // optional uint32 id = 1;
+    /**
+     * <code>optional uint32 id = 1;</code>
+     */
+    boolean hasId();
+    /**
+     * <code>optional uint32 id = 1;</code>
+     */
+    int getId();
+
+    // optional bytes publicKey = 2;
+    /**
+     * <code>optional bytes publicKey = 2;</code>
+     */
+    boolean hasPublicKey();
+    /**
+     * <code>optional bytes publicKey = 2;</code>
+     */
+    com.google.protobuf.ByteString getPublicKey();
+
+    // optional bytes privateKey = 3;
+    /**
+     * <code>optional bytes privateKey = 3;</code>
+     */
+    boolean hasPrivateKey();
+    /**
+     * <code>optional bytes privateKey = 3;</code>
+     */
+    com.google.protobuf.ByteString getPrivateKey();
+  }
+  /**
+   * Protobuf type {@code textsecure.PreKeyRecordStructure}
+   */
+  public static final class PreKeyRecordStructure extends
+      com.google.protobuf.GeneratedMessage
+      implements PreKeyRecordStructureOrBuilder {
+    // Use PreKeyRecordStructure.newBuilder() to construct.
+    private PreKeyRecordStructure(com.google.protobuf.GeneratedMessage.Builder<?> builder) {
+      super(builder);
+      this.unknownFields = builder.getUnknownFields();
+    }
+    private PreKeyRecordStructure(boolean noInit) { this.unknownFields = com.google.protobuf.UnknownFieldSet.getDefaultInstance(); }
+
+    private static final PreKeyRecordStructure defaultInstance;
+    public static PreKeyRecordStructure getDefaultInstance() {
+      return defaultInstance;
+    }
+
+    public PreKeyRecordStructure getDefaultInstanceForType() {
+      return defaultInstance;
+    }
+
+    private final com.google.protobuf.UnknownFieldSet unknownFields;
+    @java.lang.Override
+    public final com.google.protobuf.UnknownFieldSet
+        getUnknownFields() {
+      return this.unknownFields;
+    }
+    private PreKeyRecordStructure(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      initFields();
+      int mutable_bitField0_ = 0;
+      com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+          com.google.protobuf.UnknownFieldSet.newBuilder();
+      try {
+        boolean done = false;
+        while (!done) {
+          int tag = input.readTag();
+          switch (tag) {
+            case 0:
+              done = true;
+              break;
+            default: {
+              if (!parseUnknownField(input, unknownFields,
+                                     extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+            case 8: {
+              bitField0_ |= 0x00000001;
+              id_ = input.readUInt32();
+              break;
+            }
+            case 18: {
+              bitField0_ |= 0x00000002;
+              publicKey_ = input.readBytes();
+              break;
+            }
+            case 26: {
+              bitField0_ |= 0x00000004;
+              privateKey_ = input.readBytes();
+              break;
+            }
+          }
+        }
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        throw e.setUnfinishedMessage(this);
+      } catch (java.io.IOException e) {
+        throw new com.google.protobuf.InvalidProtocolBufferException(
+            e.getMessage()).setUnfinishedMessage(this);
+      } finally {
+        this.unknownFields = unknownFields.build();
+        makeExtensionsImmutable();
+      }
+    }
+    public static final com.google.protobuf.Descriptors.Descriptor
+        getDescriptor() {
+      return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_PreKeyRecordStructure_descriptor;
+    }
+
+    protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_PreKeyRecordStructure_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              org.whispersystems.libaxolotl.state.StorageProtos.PreKeyRecordStructure.class, org.whispersystems.libaxolotl.state.StorageProtos.PreKeyRecordStructure.Builder.class);
+    }
+
+    public static com.google.protobuf.Parser<PreKeyRecordStructure> PARSER =
+        new com.google.protobuf.AbstractParser<PreKeyRecordStructure>() {
+      public PreKeyRecordStructure parsePartialFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return new PreKeyRecordStructure(input, extensionRegistry);
+      }
+    };
+
+    @java.lang.Override
+    public com.google.protobuf.Parser<PreKeyRecordStructure> getParserForType() {
+      return PARSER;
+    }
+
+    private int bitField0_;
+    // optional uint32 id = 1;
+    public static final int ID_FIELD_NUMBER = 1;
+    private int id_;
+    /**
+     * <code>optional uint32 id = 1;</code>
+     */
+    public boolean hasId() {
+      return ((bitField0_ & 0x00000001) == 0x00000001);
+    }
+    /**
+     * <code>optional uint32 id = 1;</code>
+     */
+    public int getId() {
+      return id_;
+    }
+
+    // optional bytes publicKey = 2;
+    public static final int PUBLICKEY_FIELD_NUMBER = 2;
+    private com.google.protobuf.ByteString publicKey_;
+    /**
+     * <code>optional bytes publicKey = 2;</code>
+     */
+    public boolean hasPublicKey() {
+      return ((bitField0_ & 0x00000002) == 0x00000002);
+    }
+    /**
+     * <code>optional bytes publicKey = 2;</code>
+     */
+    public com.google.protobuf.ByteString getPublicKey() {
+      return publicKey_;
+    }
+
+    // optional bytes privateKey = 3;
+    public static final int PRIVATEKEY_FIELD_NUMBER = 3;
+    private com.google.protobuf.ByteString privateKey_;
+    /**
+     * <code>optional bytes privateKey = 3;</code>
+     */
+    public boolean hasPrivateKey() {
+      return ((bitField0_ & 0x00000004) == 0x00000004);
+    }
+    /**
+     * <code>optional bytes privateKey = 3;</code>
+     */
+    public com.google.protobuf.ByteString getPrivateKey() {
+      return privateKey_;
+    }
+
+    private void initFields() {
+      id_ = 0;
+      publicKey_ = com.google.protobuf.ByteString.EMPTY;
+      privateKey_ = com.google.protobuf.ByteString.EMPTY;
+    }
+    private byte memoizedIsInitialized = -1;
+    public final boolean isInitialized() {
+      byte isInitialized = memoizedIsInitialized;
+      if (isInitialized != -1) return isInitialized == 1;
+
+      memoizedIsInitialized = 1;
+      return true;
+    }
+
+    public void writeTo(com.google.protobuf.CodedOutputStream output)
+                        throws java.io.IOException {
+      getSerializedSize();
+      if (((bitField0_ & 0x00000001) == 0x00000001)) {
+        output.writeUInt32(1, id_);
+      }
+      if (((bitField0_ & 0x00000002) == 0x00000002)) {
+        output.writeBytes(2, publicKey_);
+      }
+      if (((bitField0_ & 0x00000004) == 0x00000004)) {
+        output.writeBytes(3, privateKey_);
+      }
+      getUnknownFields().writeTo(output);
+    }
+
+    private int memoizedSerializedSize = -1;
+    public int getSerializedSize() {
+      int size = memoizedSerializedSize;
+      if (size != -1) return size;
+
+      size = 0;
+      if (((bitField0_ & 0x00000001) == 0x00000001)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeUInt32Size(1, id_);
+      }
+      if (((bitField0_ & 0x00000002) == 0x00000002)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeBytesSize(2, publicKey_);
+      }
+      if (((bitField0_ & 0x00000004) == 0x00000004)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeBytesSize(3, privateKey_);
+      }
+      size += getUnknownFields().getSerializedSize();
+      memoizedSerializedSize = size;
+      return size;
+    }
+
+    private static final long serialVersionUID = 0L;
+    @java.lang.Override
+    protected java.lang.Object writeReplace()
+        throws java.io.ObjectStreamException {
+      return super.writeReplace();
+    }
+
+    public static org.whispersystems.libaxolotl.state.StorageProtos.PreKeyRecordStructure parseFrom(
+        com.google.protobuf.ByteString data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.PreKeyRecordStructure parseFrom(
+        com.google.protobuf.ByteString data,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data, extensionRegistry);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.PreKeyRecordStructure parseFrom(byte[] data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.PreKeyRecordStructure parseFrom(
+        byte[] data,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data, extensionRegistry);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.PreKeyRecordStructure parseFrom(java.io.InputStream input)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.PreKeyRecordStructure parseFrom(
+        java.io.InputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input, extensionRegistry);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.PreKeyRecordStructure parseDelimitedFrom(java.io.InputStream input)
+        throws java.io.IOException {
+      return PARSER.parseDelimitedFrom(input);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.PreKeyRecordStructure parseDelimitedFrom(
+        java.io.InputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return PARSER.parseDelimitedFrom(input, extensionRegistry);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.PreKeyRecordStructure parseFrom(
+        com.google.protobuf.CodedInputStream input)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.PreKeyRecordStructure parseFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input, extensionRegistry);
+    }
+
+    public static Builder newBuilder() { return Builder.create(); }
+    public Builder newBuilderForType() { return newBuilder(); }
+    public static Builder newBuilder(org.whispersystems.libaxolotl.state.StorageProtos.PreKeyRecordStructure prototype) {
+      return newBuilder().mergeFrom(prototype);
+    }
+    public Builder toBuilder() { return newBuilder(this); }
+
+    @java.lang.Override
+    protected Builder newBuilderForType(
+        com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+      Builder builder = new Builder(parent);
+      return builder;
+    }
+    /**
+     * Protobuf type {@code textsecure.PreKeyRecordStructure}
+     */
+    public static final class Builder extends
+        com.google.protobuf.GeneratedMessage.Builder<Builder>
+       implements org.whispersystems.libaxolotl.state.StorageProtos.PreKeyRecordStructureOrBuilder {
+      public static final com.google.protobuf.Descriptors.Descriptor
+          getDescriptor() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_PreKeyRecordStructure_descriptor;
+      }
+
+      protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+          internalGetFieldAccessorTable() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_PreKeyRecordStructure_fieldAccessorTable
+            .ensureFieldAccessorsInitialized(
+                org.whispersystems.libaxolotl.state.StorageProtos.PreKeyRecordStructure.class, org.whispersystems.libaxolotl.state.StorageProtos.PreKeyRecordStructure.Builder.class);
+      }
+
+      // Construct using org.whispersystems.libaxolotl.state.StorageProtos.PreKeyRecordStructure.newBuilder()
+      private Builder() {
+        maybeForceBuilderInitialization();
+      }
+
+      private Builder(
+          com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+        super(parent);
+        maybeForceBuilderInitialization();
+      }
+      private void maybeForceBuilderInitialization() {
+        if (com.google.protobuf.GeneratedMessage.alwaysUseFieldBuilders) {
+        }
+      }
+      private static Builder create() {
+        return new Builder();
+      }
+
+      public Builder clear() {
+        super.clear();
+        id_ = 0;
+        bitField0_ = (bitField0_ & ~0x00000001);
+        publicKey_ = com.google.protobuf.ByteString.EMPTY;
+        bitField0_ = (bitField0_ & ~0x00000002);
+        privateKey_ = com.google.protobuf.ByteString.EMPTY;
+        bitField0_ = (bitField0_ & ~0x00000004);
+        return this;
+      }
+
+      public Builder clone() {
+        return create().mergeFrom(buildPartial());
+      }
+
+      public com.google.protobuf.Descriptors.Descriptor
+          getDescriptorForType() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_PreKeyRecordStructure_descriptor;
+      }
+
+      public org.whispersystems.libaxolotl.state.StorageProtos.PreKeyRecordStructure getDefaultInstanceForType() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.PreKeyRecordStructure.getDefaultInstance();
+      }
+
+      public org.whispersystems.libaxolotl.state.StorageProtos.PreKeyRecordStructure build() {
+        org.whispersystems.libaxolotl.state.StorageProtos.PreKeyRecordStructure result = buildPartial();
+        if (!result.isInitialized()) {
+          throw newUninitializedMessageException(result);
+        }
+        return result;
+      }
+
+      public org.whispersystems.libaxolotl.state.StorageProtos.PreKeyRecordStructure buildPartial() {
+        org.whispersystems.libaxolotl.state.StorageProtos.PreKeyRecordStructure result = new org.whispersystems.libaxolotl.state.StorageProtos.PreKeyRecordStructure(this);
+        int from_bitField0_ = bitField0_;
+        int to_bitField0_ = 0;
+        if (((from_bitField0_ & 0x00000001) == 0x00000001)) {
+          to_bitField0_ |= 0x00000001;
+        }
+        result.id_ = id_;
+        if (((from_bitField0_ & 0x00000002) == 0x00000002)) {
+          to_bitField0_ |= 0x00000002;
+        }
+        result.publicKey_ = publicKey_;
+        if (((from_bitField0_ & 0x00000004) == 0x00000004)) {
+          to_bitField0_ |= 0x00000004;
+        }
+        result.privateKey_ = privateKey_;
+        result.bitField0_ = to_bitField0_;
+        onBuilt();
+        return result;
+      }
+
+      public Builder mergeFrom(com.google.protobuf.Message other) {
+        if (other instanceof org.whispersystems.libaxolotl.state.StorageProtos.PreKeyRecordStructure) {
+          return mergeFrom((org.whispersystems.libaxolotl.state.StorageProtos.PreKeyRecordStructure)other);
+        } else {
+          super.mergeFrom(other);
+          return this;
+        }
+      }
+
+      public Builder mergeFrom(org.whispersystems.libaxolotl.state.StorageProtos.PreKeyRecordStructure other) {
+        if (other == org.whispersystems.libaxolotl.state.StorageProtos.PreKeyRecordStructure.getDefaultInstance()) return this;
+        if (other.hasId()) {
+          setId(other.getId());
+        }
+        if (other.hasPublicKey()) {
+          setPublicKey(other.getPublicKey());
+        }
+        if (other.hasPrivateKey()) {
+          setPrivateKey(other.getPrivateKey());
+        }
+        this.mergeUnknownFields(other.getUnknownFields());
+        return this;
+      }
+
+      public final boolean isInitialized() {
+        return true;
+      }
+
+      public Builder mergeFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        org.whispersystems.libaxolotl.state.StorageProtos.PreKeyRecordStructure parsedMessage = null;
+        try {
+          parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+        } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+          parsedMessage = (org.whispersystems.libaxolotl.state.StorageProtos.PreKeyRecordStructure) e.getUnfinishedMessage();
+          throw e;
+        } finally {
+          if (parsedMessage != null) {
+            mergeFrom(parsedMessage);
+          }
+        }
+        return this;
+      }
+      private int bitField0_;
+
+      // optional uint32 id = 1;
+      private int id_ ;
+      /**
+       * <code>optional uint32 id = 1;</code>
+       */
+      public boolean hasId() {
+        return ((bitField0_ & 0x00000001) == 0x00000001);
+      }
+      /**
+       * <code>optional uint32 id = 1;</code>
+       */
+      public int getId() {
+        return id_;
+      }
+      /**
+       * <code>optional uint32 id = 1;</code>
+       */
+      public Builder setId(int value) {
+        bitField0_ |= 0x00000001;
+        id_ = value;
+        onChanged();
+        return this;
+      }
+      /**
+       * <code>optional uint32 id = 1;</code>
+       */
+      public Builder clearId() {
+        bitField0_ = (bitField0_ & ~0x00000001);
+        id_ = 0;
+        onChanged();
+        return this;
+      }
+
+      // optional bytes publicKey = 2;
+      private com.google.protobuf.ByteString publicKey_ = com.google.protobuf.ByteString.EMPTY;
+      /**
+       * <code>optional bytes publicKey = 2;</code>
+       */
+      public boolean hasPublicKey() {
+        return ((bitField0_ & 0x00000002) == 0x00000002);
+      }
+      /**
+       * <code>optional bytes publicKey = 2;</code>
+       */
+      public com.google.protobuf.ByteString getPublicKey() {
+        return publicKey_;
+      }
+      /**
+       * <code>optional bytes publicKey = 2;</code>
+       */
+      public Builder setPublicKey(com.google.protobuf.ByteString value) {
+        if (value == null) {
+    throw new NullPointerException();
+  }
+  bitField0_ |= 0x00000002;
+        publicKey_ = value;
+        onChanged();
+        return this;
+      }
+      /**
+       * <code>optional bytes publicKey = 2;</code>
+       */
+      public Builder clearPublicKey() {
+        bitField0_ = (bitField0_ & ~0x00000002);
+        publicKey_ = getDefaultInstance().getPublicKey();
+        onChanged();
+        return this;
+      }
+
+      // optional bytes privateKey = 3;
+      private com.google.protobuf.ByteString privateKey_ = com.google.protobuf.ByteString.EMPTY;
+      /**
+       * <code>optional bytes privateKey = 3;</code>
+       */
+      public boolean hasPrivateKey() {
+        return ((bitField0_ & 0x00000004) == 0x00000004);
+      }
+      /**
+       * <code>optional bytes privateKey = 3;</code>
+       */
+      public com.google.protobuf.ByteString getPrivateKey() {
+        return privateKey_;
+      }
+      /**
+       * <code>optional bytes privateKey = 3;</code>
+       */
+      public Builder setPrivateKey(com.google.protobuf.ByteString value) {
+        if (value == null) {
+    throw new NullPointerException();
+  }
+  bitField0_ |= 0x00000004;
+        privateKey_ = value;
+        onChanged();
+        return this;
+      }
+      /**
+       * <code>optional bytes privateKey = 3;</code>
+       */
+      public Builder clearPrivateKey() {
+        bitField0_ = (bitField0_ & ~0x00000004);
+        privateKey_ = getDefaultInstance().getPrivateKey();
+        onChanged();
+        return this;
+      }
+
+      // @@protoc_insertion_point(builder_scope:textsecure.PreKeyRecordStructure)
+    }
+
+    static {
+      defaultInstance = new PreKeyRecordStructure(true);
+      defaultInstance.initFields();
+    }
+
+    // @@protoc_insertion_point(class_scope:textsecure.PreKeyRecordStructure)
+  }
+
+  public interface SignedPreKeyRecordStructureOrBuilder
+      extends com.google.protobuf.MessageOrBuilder {
+
+    // optional uint32 id = 1;
+    /**
+     * <code>optional uint32 id = 1;</code>
+     */
+    boolean hasId();
+    /**
+     * <code>optional uint32 id = 1;</code>
+     */
+    int getId();
+
+    // optional bytes publicKey = 2;
+    /**
+     * <code>optional bytes publicKey = 2;</code>
+     */
+    boolean hasPublicKey();
+    /**
+     * <code>optional bytes publicKey = 2;</code>
+     */
+    com.google.protobuf.ByteString getPublicKey();
+
+    // optional bytes privateKey = 3;
+    /**
+     * <code>optional bytes privateKey = 3;</code>
+     */
+    boolean hasPrivateKey();
+    /**
+     * <code>optional bytes privateKey = 3;</code>
+     */
+    com.google.protobuf.ByteString getPrivateKey();
+
+    // optional bytes signature = 4;
+    /**
+     * <code>optional bytes signature = 4;</code>
+     */
+    boolean hasSignature();
+    /**
+     * <code>optional bytes signature = 4;</code>
+     */
+    com.google.protobuf.ByteString getSignature();
+
+    // optional fixed64 timestamp = 5;
+    /**
+     * <code>optional fixed64 timestamp = 5;</code>
+     */
+    boolean hasTimestamp();
+    /**
+     * <code>optional fixed64 timestamp = 5;</code>
+     */
+    long getTimestamp();
+  }
+  /**
+   * Protobuf type {@code textsecure.SignedPreKeyRecordStructure}
+   */
+  public static final class SignedPreKeyRecordStructure extends
+      com.google.protobuf.GeneratedMessage
+      implements SignedPreKeyRecordStructureOrBuilder {
+    // Use SignedPreKeyRecordStructure.newBuilder() to construct.
+    private SignedPreKeyRecordStructure(com.google.protobuf.GeneratedMessage.Builder<?> builder) {
+      super(builder);
+      this.unknownFields = builder.getUnknownFields();
+    }
+    private SignedPreKeyRecordStructure(boolean noInit) { this.unknownFields = com.google.protobuf.UnknownFieldSet.getDefaultInstance(); }
+
+    private static final SignedPreKeyRecordStructure defaultInstance;
+    public static SignedPreKeyRecordStructure getDefaultInstance() {
+      return defaultInstance;
+    }
+
+    public SignedPreKeyRecordStructure getDefaultInstanceForType() {
+      return defaultInstance;
+    }
+
+    private final com.google.protobuf.UnknownFieldSet unknownFields;
+    @java.lang.Override
+    public final com.google.protobuf.UnknownFieldSet
+        getUnknownFields() {
+      return this.unknownFields;
+    }
+    private SignedPreKeyRecordStructure(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      initFields();
+      int mutable_bitField0_ = 0;
+      com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+          com.google.protobuf.UnknownFieldSet.newBuilder();
+      try {
+        boolean done = false;
+        while (!done) {
+          int tag = input.readTag();
+          switch (tag) {
+            case 0:
+              done = true;
+              break;
+            default: {
+              if (!parseUnknownField(input, unknownFields,
+                                     extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+            case 8: {
+              bitField0_ |= 0x00000001;
+              id_ = input.readUInt32();
+              break;
+            }
+            case 18: {
+              bitField0_ |= 0x00000002;
+              publicKey_ = input.readBytes();
+              break;
+            }
+            case 26: {
+              bitField0_ |= 0x00000004;
+              privateKey_ = input.readBytes();
+              break;
+            }
+            case 34: {
+              bitField0_ |= 0x00000008;
+              signature_ = input.readBytes();
+              break;
+            }
+            case 41: {
+              bitField0_ |= 0x00000010;
+              timestamp_ = input.readFixed64();
+              break;
+            }
+          }
+        }
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        throw e.setUnfinishedMessage(this);
+      } catch (java.io.IOException e) {
+        throw new com.google.protobuf.InvalidProtocolBufferException(
+            e.getMessage()).setUnfinishedMessage(this);
+      } finally {
+        this.unknownFields = unknownFields.build();
+        makeExtensionsImmutable();
+      }
+    }
+    public static final com.google.protobuf.Descriptors.Descriptor
+        getDescriptor() {
+      return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SignedPreKeyRecordStructure_descriptor;
+    }
+
+    protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SignedPreKeyRecordStructure_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              org.whispersystems.libaxolotl.state.StorageProtos.SignedPreKeyRecordStructure.class, org.whispersystems.libaxolotl.state.StorageProtos.SignedPreKeyRecordStructure.Builder.class);
+    }
+
+    public static com.google.protobuf.Parser<SignedPreKeyRecordStructure> PARSER =
+        new com.google.protobuf.AbstractParser<SignedPreKeyRecordStructure>() {
+      public SignedPreKeyRecordStructure parsePartialFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return new SignedPreKeyRecordStructure(input, extensionRegistry);
+      }
+    };
+
+    @java.lang.Override
+    public com.google.protobuf.Parser<SignedPreKeyRecordStructure> getParserForType() {
+      return PARSER;
+    }
+
+    private int bitField0_;
+    // optional uint32 id = 1;
+    public static final int ID_FIELD_NUMBER = 1;
+    private int id_;
+    /**
+     * <code>optional uint32 id = 1;</code>
+     */
+    public boolean hasId() {
+      return ((bitField0_ & 0x00000001) == 0x00000001);
+    }
+    /**
+     * <code>optional uint32 id = 1;</code>
+     */
+    public int getId() {
+      return id_;
+    }
+
+    // optional bytes publicKey = 2;
+    public static final int PUBLICKEY_FIELD_NUMBER = 2;
+    private com.google.protobuf.ByteString publicKey_;
+    /**
+     * <code>optional bytes publicKey = 2;</code>
+     */
+    public boolean hasPublicKey() {
+      return ((bitField0_ & 0x00000002) == 0x00000002);
+    }
+    /**
+     * <code>optional bytes publicKey = 2;</code>
+     */
+    public com.google.protobuf.ByteString getPublicKey() {
+      return publicKey_;
+    }
+
+    // optional bytes privateKey = 3;
+    public static final int PRIVATEKEY_FIELD_NUMBER = 3;
+    private com.google.protobuf.ByteString privateKey_;
+    /**
+     * <code>optional bytes privateKey = 3;</code>
+     */
+    public boolean hasPrivateKey() {
+      return ((bitField0_ & 0x00000004) == 0x00000004);
+    }
+    /**
+     * <code>optional bytes privateKey = 3;</code>
+     */
+    public com.google.protobuf.ByteString getPrivateKey() {
+      return privateKey_;
+    }
+
+    // optional bytes signature = 4;
+    public static final int SIGNATURE_FIELD_NUMBER = 4;
+    private com.google.protobuf.ByteString signature_;
+    /**
+     * <code>optional bytes signature = 4;</code>
+     */
+    public boolean hasSignature() {
+      return ((bitField0_ & 0x00000008) == 0x00000008);
+    }
+    /**
+     * <code>optional bytes signature = 4;</code>
+     */
+    public com.google.protobuf.ByteString getSignature() {
+      return signature_;
+    }
+
+    // optional fixed64 timestamp = 5;
+    public static final int TIMESTAMP_FIELD_NUMBER = 5;
+    private long timestamp_;
+    /**
+     * <code>optional fixed64 timestamp = 5;</code>
+     */
+    public boolean hasTimestamp() {
+      return ((bitField0_ & 0x00000010) == 0x00000010);
+    }
+    /**
+     * <code>optional fixed64 timestamp = 5;</code>
+     */
+    public long getTimestamp() {
+      return timestamp_;
+    }
+
+    private void initFields() {
+      id_ = 0;
+      publicKey_ = com.google.protobuf.ByteString.EMPTY;
+      privateKey_ = com.google.protobuf.ByteString.EMPTY;
+      signature_ = com.google.protobuf.ByteString.EMPTY;
+      timestamp_ = 0L;
+    }
+    private byte memoizedIsInitialized = -1;
+    public final boolean isInitialized() {
+      byte isInitialized = memoizedIsInitialized;
+      if (isInitialized != -1) return isInitialized == 1;
+
+      memoizedIsInitialized = 1;
+      return true;
+    }
+
+    public void writeTo(com.google.protobuf.CodedOutputStream output)
+                        throws java.io.IOException {
+      getSerializedSize();
+      if (((bitField0_ & 0x00000001) == 0x00000001)) {
+        output.writeUInt32(1, id_);
+      }
+      if (((bitField0_ & 0x00000002) == 0x00000002)) {
+        output.writeBytes(2, publicKey_);
+      }
+      if (((bitField0_ & 0x00000004) == 0x00000004)) {
+        output.writeBytes(3, privateKey_);
+      }
+      if (((bitField0_ & 0x00000008) == 0x00000008)) {
+        output.writeBytes(4, signature_);
+      }
+      if (((bitField0_ & 0x00000010) == 0x00000010)) {
+        output.writeFixed64(5, timestamp_);
+      }
+      getUnknownFields().writeTo(output);
+    }
+
+    private int memoizedSerializedSize = -1;
+    public int getSerializedSize() {
+      int size = memoizedSerializedSize;
+      if (size != -1) return size;
+
+      size = 0;
+      if (((bitField0_ & 0x00000001) == 0x00000001)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeUInt32Size(1, id_);
+      }
+      if (((bitField0_ & 0x00000002) == 0x00000002)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeBytesSize(2, publicKey_);
+      }
+      if (((bitField0_ & 0x00000004) == 0x00000004)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeBytesSize(3, privateKey_);
+      }
+      if (((bitField0_ & 0x00000008) == 0x00000008)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeBytesSize(4, signature_);
+      }
+      if (((bitField0_ & 0x00000010) == 0x00000010)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeFixed64Size(5, timestamp_);
+      }
+      size += getUnknownFields().getSerializedSize();
+      memoizedSerializedSize = size;
+      return size;
+    }
+
+    private static final long serialVersionUID = 0L;
+    @java.lang.Override
+    protected java.lang.Object writeReplace()
+        throws java.io.ObjectStreamException {
+      return super.writeReplace();
+    }
+
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SignedPreKeyRecordStructure parseFrom(
+        com.google.protobuf.ByteString data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SignedPreKeyRecordStructure parseFrom(
+        com.google.protobuf.ByteString data,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data, extensionRegistry);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SignedPreKeyRecordStructure parseFrom(byte[] data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SignedPreKeyRecordStructure parseFrom(
+        byte[] data,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data, extensionRegistry);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SignedPreKeyRecordStructure parseFrom(java.io.InputStream input)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SignedPreKeyRecordStructure parseFrom(
+        java.io.InputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input, extensionRegistry);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SignedPreKeyRecordStructure parseDelimitedFrom(java.io.InputStream input)
+        throws java.io.IOException {
+      return PARSER.parseDelimitedFrom(input);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SignedPreKeyRecordStructure parseDelimitedFrom(
+        java.io.InputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return PARSER.parseDelimitedFrom(input, extensionRegistry);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SignedPreKeyRecordStructure parseFrom(
+        com.google.protobuf.CodedInputStream input)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SignedPreKeyRecordStructure parseFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input, extensionRegistry);
+    }
+
+    public static Builder newBuilder() { return Builder.create(); }
+    public Builder newBuilderForType() { return newBuilder(); }
+    public static Builder newBuilder(org.whispersystems.libaxolotl.state.StorageProtos.SignedPreKeyRecordStructure prototype) {
+      return newBuilder().mergeFrom(prototype);
+    }
+    public Builder toBuilder() { return newBuilder(this); }
+
+    @java.lang.Override
+    protected Builder newBuilderForType(
+        com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+      Builder builder = new Builder(parent);
+      return builder;
+    }
+    /**
+     * Protobuf type {@code textsecure.SignedPreKeyRecordStructure}
+     */
+    public static final class Builder extends
+        com.google.protobuf.GeneratedMessage.Builder<Builder>
+       implements org.whispersystems.libaxolotl.state.StorageProtos.SignedPreKeyRecordStructureOrBuilder {
+      public static final com.google.protobuf.Descriptors.Descriptor
+          getDescriptor() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SignedPreKeyRecordStructure_descriptor;
+      }
+
+      protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+          internalGetFieldAccessorTable() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SignedPreKeyRecordStructure_fieldAccessorTable
+            .ensureFieldAccessorsInitialized(
+                org.whispersystems.libaxolotl.state.StorageProtos.SignedPreKeyRecordStructure.class, org.whispersystems.libaxolotl.state.StorageProtos.SignedPreKeyRecordStructure.Builder.class);
+      }
+
+      // Construct using org.whispersystems.libaxolotl.state.StorageProtos.SignedPreKeyRecordStructure.newBuilder()
+      private Builder() {
+        maybeForceBuilderInitialization();
+      }
+
+      private Builder(
+          com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+        super(parent);
+        maybeForceBuilderInitialization();
+      }
+      private void maybeForceBuilderInitialization() {
+        if (com.google.protobuf.GeneratedMessage.alwaysUseFieldBuilders) {
+        }
+      }
+      private static Builder create() {
+        return new Builder();
+      }
+
+      public Builder clear() {
+        super.clear();
+        id_ = 0;
+        bitField0_ = (bitField0_ & ~0x00000001);
+        publicKey_ = com.google.protobuf.ByteString.EMPTY;
+        bitField0_ = (bitField0_ & ~0x00000002);
+        privateKey_ = com.google.protobuf.ByteString.EMPTY;
+        bitField0_ = (bitField0_ & ~0x00000004);
+        signature_ = com.google.protobuf.ByteString.EMPTY;
+        bitField0_ = (bitField0_ & ~0x00000008);
+        timestamp_ = 0L;
+        bitField0_ = (bitField0_ & ~0x00000010);
+        return this;
+      }
+
+      public Builder clone() {
+        return create().mergeFrom(buildPartial());
+      }
+
+      public com.google.protobuf.Descriptors.Descriptor
+          getDescriptorForType() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SignedPreKeyRecordStructure_descriptor;
+      }
+
+      public org.whispersystems.libaxolotl.state.StorageProtos.SignedPreKeyRecordStructure getDefaultInstanceForType() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.SignedPreKeyRecordStructure.getDefaultInstance();
+      }
+
+      public org.whispersystems.libaxolotl.state.StorageProtos.SignedPreKeyRecordStructure build() {
+        org.whispersystems.libaxolotl.state.StorageProtos.SignedPreKeyRecordStructure result = buildPartial();
+        if (!result.isInitialized()) {
+          throw newUninitializedMessageException(result);
+        }
+        return result;
+      }
+
+      public org.whispersystems.libaxolotl.state.StorageProtos.SignedPreKeyRecordStructure buildPartial() {
+        org.whispersystems.libaxolotl.state.StorageProtos.SignedPreKeyRecordStructure result = new org.whispersystems.libaxolotl.state.StorageProtos.SignedPreKeyRecordStructure(this);
+        int from_bitField0_ = bitField0_;
+        int to_bitField0_ = 0;
+        if (((from_bitField0_ & 0x00000001) == 0x00000001)) {
+          to_bitField0_ |= 0x00000001;
+        }
+        result.id_ = id_;
+        if (((from_bitField0_ & 0x00000002) == 0x00000002)) {
+          to_bitField0_ |= 0x00000002;
+        }
+        result.publicKey_ = publicKey_;
+        if (((from_bitField0_ & 0x00000004) == 0x00000004)) {
+          to_bitField0_ |= 0x00000004;
+        }
+        result.privateKey_ = privateKey_;
+        if (((from_bitField0_ & 0x00000008) == 0x00000008)) {
+          to_bitField0_ |= 0x00000008;
+        }
+        result.signature_ = signature_;
+        if (((from_bitField0_ & 0x00000010) == 0x00000010)) {
+          to_bitField0_ |= 0x00000010;
+        }
+        result.timestamp_ = timestamp_;
+        result.bitField0_ = to_bitField0_;
+        onBuilt();
+        return result;
+      }
+
+      public Builder mergeFrom(com.google.protobuf.Message other) {
+        if (other instanceof org.whispersystems.libaxolotl.state.StorageProtos.SignedPreKeyRecordStructure) {
+          return mergeFrom((org.whispersystems.libaxolotl.state.StorageProtos.SignedPreKeyRecordStructure)other);
+        } else {
+          super.mergeFrom(other);
+          return this;
+        }
+      }
+
+      public Builder mergeFrom(org.whispersystems.libaxolotl.state.StorageProtos.SignedPreKeyRecordStructure other) {
+        if (other == org.whispersystems.libaxolotl.state.StorageProtos.SignedPreKeyRecordStructure.getDefaultInstance()) return this;
+        if (other.hasId()) {
+          setId(other.getId());
+        }
+        if (other.hasPublicKey()) {
+          setPublicKey(other.getPublicKey());
+        }
+        if (other.hasPrivateKey()) {
+          setPrivateKey(other.getPrivateKey());
+        }
+        if (other.hasSignature()) {
+          setSignature(other.getSignature());
+        }
+        if (other.hasTimestamp()) {
+          setTimestamp(other.getTimestamp());
+        }
+        this.mergeUnknownFields(other.getUnknownFields());
+        return this;
+      }
+
+      public final boolean isInitialized() {
+        return true;
+      }
+
+      public Builder mergeFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        org.whispersystems.libaxolotl.state.StorageProtos.SignedPreKeyRecordStructure parsedMessage = null;
+        try {
+          parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+        } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+          parsedMessage = (org.whispersystems.libaxolotl.state.StorageProtos.SignedPreKeyRecordStructure) e.getUnfinishedMessage();
+          throw e;
+        } finally {
+          if (parsedMessage != null) {
+            mergeFrom(parsedMessage);
+          }
+        }
+        return this;
+      }
+      private int bitField0_;
+
+      // optional uint32 id = 1;
+      private int id_ ;
+      /**
+       * <code>optional uint32 id = 1;</code>
+       */
+      public boolean hasId() {
+        return ((bitField0_ & 0x00000001) == 0x00000001);
+      }
+      /**
+       * <code>optional uint32 id = 1;</code>
+       */
+      public int getId() {
+        return id_;
+      }
+      /**
+       * <code>optional uint32 id = 1;</code>
+       */
+      public Builder setId(int value) {
+        bitField0_ |= 0x00000001;
+        id_ = value;
+        onChanged();
+        return this;
+      }
+      /**
+       * <code>optional uint32 id = 1;</code>
+       */
+      public Builder clearId() {
+        bitField0_ = (bitField0_ & ~0x00000001);
+        id_ = 0;
+        onChanged();
+        return this;
+      }
+
+      // optional bytes publicKey = 2;
+      private com.google.protobuf.ByteString publicKey_ = com.google.protobuf.ByteString.EMPTY;
+      /**
+       * <code>optional bytes publicKey = 2;</code>
+       */
+      public boolean hasPublicKey() {
+        return ((bitField0_ & 0x00000002) == 0x00000002);
+      }
+      /**
+       * <code>optional bytes publicKey = 2;</code>
+       */
+      public com.google.protobuf.ByteString getPublicKey() {
+        return publicKey_;
+      }
+      /**
+       * <code>optional bytes publicKey = 2;</code>
+       */
+      public Builder setPublicKey(com.google.protobuf.ByteString value) {
+        if (value == null) {
+    throw new NullPointerException();
+  }
+  bitField0_ |= 0x00000002;
+        publicKey_ = value;
+        onChanged();
+        return this;
+      }
+      /**
+       * <code>optional bytes publicKey = 2;</code>
+       */
+      public Builder clearPublicKey() {
+        bitField0_ = (bitField0_ & ~0x00000002);
+        publicKey_ = getDefaultInstance().getPublicKey();
+        onChanged();
+        return this;
+      }
+
+      // optional bytes privateKey = 3;
+      private com.google.protobuf.ByteString privateKey_ = com.google.protobuf.ByteString.EMPTY;
+      /**
+       * <code>optional bytes privateKey = 3;</code>
+       */
+      public boolean hasPrivateKey() {
+        return ((bitField0_ & 0x00000004) == 0x00000004);
+      }
+      /**
+       * <code>optional bytes privateKey = 3;</code>
+       */
+      public com.google.protobuf.ByteString getPrivateKey() {
+        return privateKey_;
+      }
+      /**
+       * <code>optional bytes privateKey = 3;</code>
+       */
+      public Builder setPrivateKey(com.google.protobuf.ByteString value) {
+        if (value == null) {
+    throw new NullPointerException();
+  }
+  bitField0_ |= 0x00000004;
+        privateKey_ = value;
+        onChanged();
+        return this;
+      }
+      /**
+       * <code>optional bytes privateKey = 3;</code>
+       */
+      public Builder clearPrivateKey() {
+        bitField0_ = (bitField0_ & ~0x00000004);
+        privateKey_ = getDefaultInstance().getPrivateKey();
+        onChanged();
+        return this;
+      }
+
+      // optional bytes signature = 4;
+      private com.google.protobuf.ByteString signature_ = com.google.protobuf.ByteString.EMPTY;
+      /**
+       * <code>optional bytes signature = 4;</code>
+       */
+      public boolean hasSignature() {
+        return ((bitField0_ & 0x00000008) == 0x00000008);
+      }
+      /**
+       * <code>optional bytes signature = 4;</code>
+       */
+      public com.google.protobuf.ByteString getSignature() {
+        return signature_;
+      }
+      /**
+       * <code>optional bytes signature = 4;</code>
+       */
+      public Builder setSignature(com.google.protobuf.ByteString value) {
+        if (value == null) {
+    throw new NullPointerException();
+  }
+  bitField0_ |= 0x00000008;
+        signature_ = value;
+        onChanged();
+        return this;
+      }
+      /**
+       * <code>optional bytes signature = 4;</code>
+       */
+      public Builder clearSignature() {
+        bitField0_ = (bitField0_ & ~0x00000008);
+        signature_ = getDefaultInstance().getSignature();
+        onChanged();
+        return this;
+      }
+
+      // optional fixed64 timestamp = 5;
+      private long timestamp_ ;
+      /**
+       * <code>optional fixed64 timestamp = 5;</code>
+       */
+      public boolean hasTimestamp() {
+        return ((bitField0_ & 0x00000010) == 0x00000010);
+      }
+      /**
+       * <code>optional fixed64 timestamp = 5;</code>
+       */
+      public long getTimestamp() {
+        return timestamp_;
+      }
+      /**
+       * <code>optional fixed64 timestamp = 5;</code>
+       */
+      public Builder setTimestamp(long value) {
+        bitField0_ |= 0x00000010;
+        timestamp_ = value;
+        onChanged();
+        return this;
+      }
+      /**
+       * <code>optional fixed64 timestamp = 5;</code>
+       */
+      public Builder clearTimestamp() {
+        bitField0_ = (bitField0_ & ~0x00000010);
+        timestamp_ = 0L;
+        onChanged();
+        return this;
+      }
+
+      // @@protoc_insertion_point(builder_scope:textsecure.SignedPreKeyRecordStructure)
+    }
+
+    static {
+      defaultInstance = new SignedPreKeyRecordStructure(true);
+      defaultInstance.initFields();
+    }
+
+    // @@protoc_insertion_point(class_scope:textsecure.SignedPreKeyRecordStructure)
+  }
+
+  public interface IdentityKeyPairStructureOrBuilder
+      extends com.google.protobuf.MessageOrBuilder {
+
+    // optional bytes publicKey = 1;
+    /**
+     * <code>optional bytes publicKey = 1;</code>
+     */
+    boolean hasPublicKey();
+    /**
+     * <code>optional bytes publicKey = 1;</code>
+     */
+    com.google.protobuf.ByteString getPublicKey();
+
+    // optional bytes privateKey = 2;
+    /**
+     * <code>optional bytes privateKey = 2;</code>
+     */
+    boolean hasPrivateKey();
+    /**
+     * <code>optional bytes privateKey = 2;</code>
+     */
+    com.google.protobuf.ByteString getPrivateKey();
+  }
+  /**
+   * Protobuf type {@code textsecure.IdentityKeyPairStructure}
+   */
+  public static final class IdentityKeyPairStructure extends
+      com.google.protobuf.GeneratedMessage
+      implements IdentityKeyPairStructureOrBuilder {
+    // Use IdentityKeyPairStructure.newBuilder() to construct.
+    private IdentityKeyPairStructure(com.google.protobuf.GeneratedMessage.Builder<?> builder) {
+      super(builder);
+      this.unknownFields = builder.getUnknownFields();
+    }
+    private IdentityKeyPairStructure(boolean noInit) { this.unknownFields = com.google.protobuf.UnknownFieldSet.getDefaultInstance(); }
+
+    private static final IdentityKeyPairStructure defaultInstance;
+    public static IdentityKeyPairStructure getDefaultInstance() {
+      return defaultInstance;
+    }
+
+    public IdentityKeyPairStructure getDefaultInstanceForType() {
+      return defaultInstance;
+    }
+
+    private final com.google.protobuf.UnknownFieldSet unknownFields;
+    @java.lang.Override
+    public final com.google.protobuf.UnknownFieldSet
+        getUnknownFields() {
+      return this.unknownFields;
+    }
+    private IdentityKeyPairStructure(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      initFields();
+      int mutable_bitField0_ = 0;
+      com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+          com.google.protobuf.UnknownFieldSet.newBuilder();
+      try {
+        boolean done = false;
+        while (!done) {
+          int tag = input.readTag();
+          switch (tag) {
+            case 0:
+              done = true;
+              break;
+            default: {
+              if (!parseUnknownField(input, unknownFields,
+                                     extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+            case 10: {
+              bitField0_ |= 0x00000001;
+              publicKey_ = input.readBytes();
+              break;
+            }
+            case 18: {
+              bitField0_ |= 0x00000002;
+              privateKey_ = input.readBytes();
+              break;
+            }
+          }
+        }
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        throw e.setUnfinishedMessage(this);
+      } catch (java.io.IOException e) {
+        throw new com.google.protobuf.InvalidProtocolBufferException(
+            e.getMessage()).setUnfinishedMessage(this);
+      } finally {
+        this.unknownFields = unknownFields.build();
+        makeExtensionsImmutable();
+      }
+    }
+    public static final com.google.protobuf.Descriptors.Descriptor
+        getDescriptor() {
+      return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_IdentityKeyPairStructure_descriptor;
+    }
+
+    protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_IdentityKeyPairStructure_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              org.whispersystems.libaxolotl.state.StorageProtos.IdentityKeyPairStructure.class, org.whispersystems.libaxolotl.state.StorageProtos.IdentityKeyPairStructure.Builder.class);
+    }
+
+    public static com.google.protobuf.Parser<IdentityKeyPairStructure> PARSER =
+        new com.google.protobuf.AbstractParser<IdentityKeyPairStructure>() {
+      public IdentityKeyPairStructure parsePartialFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return new IdentityKeyPairStructure(input, extensionRegistry);
+      }
+    };
+
+    @java.lang.Override
+    public com.google.protobuf.Parser<IdentityKeyPairStructure> getParserForType() {
+      return PARSER;
+    }
+
+    private int bitField0_;
+    // optional bytes publicKey = 1;
+    public static final int PUBLICKEY_FIELD_NUMBER = 1;
+    private com.google.protobuf.ByteString publicKey_;
+    /**
+     * <code>optional bytes publicKey = 1;</code>
+     */
+    public boolean hasPublicKey() {
+      return ((bitField0_ & 0x00000001) == 0x00000001);
+    }
+    /**
+     * <code>optional bytes publicKey = 1;</code>
+     */
+    public com.google.protobuf.ByteString getPublicKey() {
+      return publicKey_;
+    }
+
+    // optional bytes privateKey = 2;
+    public static final int PRIVATEKEY_FIELD_NUMBER = 2;
+    private com.google.protobuf.ByteString privateKey_;
+    /**
+     * <code>optional bytes privateKey = 2;</code>
+     */
+    public boolean hasPrivateKey() {
+      return ((bitField0_ & 0x00000002) == 0x00000002);
+    }
+    /**
+     * <code>optional bytes privateKey = 2;</code>
+     */
+    public com.google.protobuf.ByteString getPrivateKey() {
+      return privateKey_;
+    }
+
+    private void initFields() {
+      publicKey_ = com.google.protobuf.ByteString.EMPTY;
+      privateKey_ = com.google.protobuf.ByteString.EMPTY;
+    }
+    private byte memoizedIsInitialized = -1;
+    public final boolean isInitialized() {
+      byte isInitialized = memoizedIsInitialized;
+      if (isInitialized != -1) return isInitialized == 1;
+
+      memoizedIsInitialized = 1;
+      return true;
+    }
+
+    public void writeTo(com.google.protobuf.CodedOutputStream output)
+                        throws java.io.IOException {
+      getSerializedSize();
+      if (((bitField0_ & 0x00000001) == 0x00000001)) {
+        output.writeBytes(1, publicKey_);
+      }
+      if (((bitField0_ & 0x00000002) == 0x00000002)) {
+        output.writeBytes(2, privateKey_);
+      }
+      getUnknownFields().writeTo(output);
+    }
+
+    private int memoizedSerializedSize = -1;
+    public int getSerializedSize() {
+      int size = memoizedSerializedSize;
+      if (size != -1) return size;
+
+      size = 0;
+      if (((bitField0_ & 0x00000001) == 0x00000001)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeBytesSize(1, publicKey_);
+      }
+      if (((bitField0_ & 0x00000002) == 0x00000002)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeBytesSize(2, privateKey_);
+      }
+      size += getUnknownFields().getSerializedSize();
+      memoizedSerializedSize = size;
+      return size;
+    }
+
+    private static final long serialVersionUID = 0L;
+    @java.lang.Override
+    protected java.lang.Object writeReplace()
+        throws java.io.ObjectStreamException {
+      return super.writeReplace();
+    }
+
+    public static org.whispersystems.libaxolotl.state.StorageProtos.IdentityKeyPairStructure parseFrom(
+        com.google.protobuf.ByteString data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.IdentityKeyPairStructure parseFrom(
+        com.google.protobuf.ByteString data,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data, extensionRegistry);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.IdentityKeyPairStructure parseFrom(byte[] data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.IdentityKeyPairStructure parseFrom(
+        byte[] data,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data, extensionRegistry);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.IdentityKeyPairStructure parseFrom(java.io.InputStream input)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.IdentityKeyPairStructure parseFrom(
+        java.io.InputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input, extensionRegistry);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.IdentityKeyPairStructure parseDelimitedFrom(java.io.InputStream input)
+        throws java.io.IOException {
+      return PARSER.parseDelimitedFrom(input);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.IdentityKeyPairStructure parseDelimitedFrom(
+        java.io.InputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return PARSER.parseDelimitedFrom(input, extensionRegistry);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.IdentityKeyPairStructure parseFrom(
+        com.google.protobuf.CodedInputStream input)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.IdentityKeyPairStructure parseFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input, extensionRegistry);
+    }
+
+    public static Builder newBuilder() { return Builder.create(); }
+    public Builder newBuilderForType() { return newBuilder(); }
+    public static Builder newBuilder(org.whispersystems.libaxolotl.state.StorageProtos.IdentityKeyPairStructure prototype) {
+      return newBuilder().mergeFrom(prototype);
+    }
+    public Builder toBuilder() { return newBuilder(this); }
+
+    @java.lang.Override
+    protected Builder newBuilderForType(
+        com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+      Builder builder = new Builder(parent);
+      return builder;
+    }
+    /**
+     * Protobuf type {@code textsecure.IdentityKeyPairStructure}
+     */
+    public static final class Builder extends
+        com.google.protobuf.GeneratedMessage.Builder<Builder>
+       implements org.whispersystems.libaxolotl.state.StorageProtos.IdentityKeyPairStructureOrBuilder {
+      public static final com.google.protobuf.Descriptors.Descriptor
+          getDescriptor() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_IdentityKeyPairStructure_descriptor;
+      }
+
+      protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+          internalGetFieldAccessorTable() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_IdentityKeyPairStructure_fieldAccessorTable
+            .ensureFieldAccessorsInitialized(
+                org.whispersystems.libaxolotl.state.StorageProtos.IdentityKeyPairStructure.class, org.whispersystems.libaxolotl.state.StorageProtos.IdentityKeyPairStructure.Builder.class);
+      }
+
+      // Construct using org.whispersystems.libaxolotl.state.StorageProtos.IdentityKeyPairStructure.newBuilder()
+      private Builder() {
+        maybeForceBuilderInitialization();
+      }
+
+      private Builder(
+          com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+        super(parent);
+        maybeForceBuilderInitialization();
+      }
+      private void maybeForceBuilderInitialization() {
+        if (com.google.protobuf.GeneratedMessage.alwaysUseFieldBuilders) {
+        }
+      }
+      private static Builder create() {
+        return new Builder();
+      }
+
+      public Builder clear() {
+        super.clear();
+        publicKey_ = com.google.protobuf.ByteString.EMPTY;
+        bitField0_ = (bitField0_ & ~0x00000001);
+        privateKey_ = com.google.protobuf.ByteString.EMPTY;
+        bitField0_ = (bitField0_ & ~0x00000002);
+        return this;
+      }
+
+      public Builder clone() {
+        return create().mergeFrom(buildPartial());
+      }
+
+      public com.google.protobuf.Descriptors.Descriptor
+          getDescriptorForType() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_IdentityKeyPairStructure_descriptor;
+      }
+
+      public org.whispersystems.libaxolotl.state.StorageProtos.IdentityKeyPairStructure getDefaultInstanceForType() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.IdentityKeyPairStructure.getDefaultInstance();
+      }
+
+      public org.whispersystems.libaxolotl.state.StorageProtos.IdentityKeyPairStructure build() {
+        org.whispersystems.libaxolotl.state.StorageProtos.IdentityKeyPairStructure result = buildPartial();
+        if (!result.isInitialized()) {
+          throw newUninitializedMessageException(result);
+        }
+        return result;
+      }
+
+      public org.whispersystems.libaxolotl.state.StorageProtos.IdentityKeyPairStructure buildPartial() {
+        org.whispersystems.libaxolotl.state.StorageProtos.IdentityKeyPairStructure result = new org.whispersystems.libaxolotl.state.StorageProtos.IdentityKeyPairStructure(this);
+        int from_bitField0_ = bitField0_;
+        int to_bitField0_ = 0;
+        if (((from_bitField0_ & 0x00000001) == 0x00000001)) {
+          to_bitField0_ |= 0x00000001;
+        }
+        result.publicKey_ = publicKey_;
+        if (((from_bitField0_ & 0x00000002) == 0x00000002)) {
+          to_bitField0_ |= 0x00000002;
+        }
+        result.privateKey_ = privateKey_;
+        result.bitField0_ = to_bitField0_;
+        onBuilt();
+        return result;
+      }
+
+      public Builder mergeFrom(com.google.protobuf.Message other) {
+        if (other instanceof org.whispersystems.libaxolotl.state.StorageProtos.IdentityKeyPairStructure) {
+          return mergeFrom((org.whispersystems.libaxolotl.state.StorageProtos.IdentityKeyPairStructure)other);
+        } else {
+          super.mergeFrom(other);
+          return this;
+        }
+      }
+
+      public Builder mergeFrom(org.whispersystems.libaxolotl.state.StorageProtos.IdentityKeyPairStructure other) {
+        if (other == org.whispersystems.libaxolotl.state.StorageProtos.IdentityKeyPairStructure.getDefaultInstance()) return this;
+        if (other.hasPublicKey()) {
+          setPublicKey(other.getPublicKey());
+        }
+        if (other.hasPrivateKey()) {
+          setPrivateKey(other.getPrivateKey());
+        }
+        this.mergeUnknownFields(other.getUnknownFields());
+        return this;
+      }
+
+      public final boolean isInitialized() {
+        return true;
+      }
+
+      public Builder mergeFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        org.whispersystems.libaxolotl.state.StorageProtos.IdentityKeyPairStructure parsedMessage = null;
+        try {
+          parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+        } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+          parsedMessage = (org.whispersystems.libaxolotl.state.StorageProtos.IdentityKeyPairStructure) e.getUnfinishedMessage();
+          throw e;
+        } finally {
+          if (parsedMessage != null) {
+            mergeFrom(parsedMessage);
+          }
+        }
+        return this;
+      }
+      private int bitField0_;
+
+      // optional bytes publicKey = 1;
+      private com.google.protobuf.ByteString publicKey_ = com.google.protobuf.ByteString.EMPTY;
+      /**
+       * <code>optional bytes publicKey = 1;</code>
+       */
+      public boolean hasPublicKey() {
+        return ((bitField0_ & 0x00000001) == 0x00000001);
+      }
+      /**
+       * <code>optional bytes publicKey = 1;</code>
+       */
+      public com.google.protobuf.ByteString getPublicKey() {
+        return publicKey_;
+      }
+      /**
+       * <code>optional bytes publicKey = 1;</code>
+       */
+      public Builder setPublicKey(com.google.protobuf.ByteString value) {
+        if (value == null) {
+    throw new NullPointerException();
+  }
+  bitField0_ |= 0x00000001;
+        publicKey_ = value;
+        onChanged();
+        return this;
+      }
+      /**
+       * <code>optional bytes publicKey = 1;</code>
+       */
+      public Builder clearPublicKey() {
+        bitField0_ = (bitField0_ & ~0x00000001);
+        publicKey_ = getDefaultInstance().getPublicKey();
+        onChanged();
+        return this;
+      }
+
+      // optional bytes privateKey = 2;
+      private com.google.protobuf.ByteString privateKey_ = com.google.protobuf.ByteString.EMPTY;
+      /**
+       * <code>optional bytes privateKey = 2;</code>
+       */
+      public boolean hasPrivateKey() {
+        return ((bitField0_ & 0x00000002) == 0x00000002);
+      }
+      /**
+       * <code>optional bytes privateKey = 2;</code>
+       */
+      public com.google.protobuf.ByteString getPrivateKey() {
+        return privateKey_;
+      }
+      /**
+       * <code>optional bytes privateKey = 2;</code>
+       */
+      public Builder setPrivateKey(com.google.protobuf.ByteString value) {
+        if (value == null) {
+    throw new NullPointerException();
+  }
+  bitField0_ |= 0x00000002;
+        privateKey_ = value;
+        onChanged();
+        return this;
+      }
+      /**
+       * <code>optional bytes privateKey = 2;</code>
+       */
+      public Builder clearPrivateKey() {
+        bitField0_ = (bitField0_ & ~0x00000002);
+        privateKey_ = getDefaultInstance().getPrivateKey();
+        onChanged();
+        return this;
+      }
+
+      // @@protoc_insertion_point(builder_scope:textsecure.IdentityKeyPairStructure)
+    }
+
+    static {
+      defaultInstance = new IdentityKeyPairStructure(true);
+      defaultInstance.initFields();
+    }
+
+    // @@protoc_insertion_point(class_scope:textsecure.IdentityKeyPairStructure)
+  }
+
+  public interface SenderKeyStateStructureOrBuilder
+      extends com.google.protobuf.MessageOrBuilder {
+
+    // optional uint32 senderKeyId = 1;
+    /**
+     * <code>optional uint32 senderKeyId = 1;</code>
+     */
+    boolean hasSenderKeyId();
+    /**
+     * <code>optional uint32 senderKeyId = 1;</code>
+     */
+    int getSenderKeyId();
+
+    // optional .textsecure.SenderKeyStateStructure.SenderChainKey senderChainKey = 2;
+    /**
+     * <code>optional .textsecure.SenderKeyStateStructure.SenderChainKey senderChainKey = 2;</code>
+     */
+    boolean hasSenderChainKey();
+    /**
+     * <code>optional .textsecure.SenderKeyStateStructure.SenderChainKey senderChainKey = 2;</code>
+     */
+    org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey getSenderChainKey();
+    /**
+     * <code>optional .textsecure.SenderKeyStateStructure.SenderChainKey senderChainKey = 2;</code>
+     */
+    org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKeyOrBuilder getSenderChainKeyOrBuilder();
+
+    // optional .textsecure.SenderKeyStateStructure.SenderSigningKey senderSigningKey = 3;
+    /**
+     * <code>optional .textsecure.SenderKeyStateStructure.SenderSigningKey senderSigningKey = 3;</code>
+     */
+    boolean hasSenderSigningKey();
+    /**
+     * <code>optional .textsecure.SenderKeyStateStructure.SenderSigningKey senderSigningKey = 3;</code>
+     */
+    org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKey getSenderSigningKey();
+    /**
+     * <code>optional .textsecure.SenderKeyStateStructure.SenderSigningKey senderSigningKey = 3;</code>
+     */
+    org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKeyOrBuilder getSenderSigningKeyOrBuilder();
+
+    // repeated .textsecure.SenderKeyStateStructure.SenderMessageKey senderMessageKeys = 4;
+    /**
+     * <code>repeated .textsecure.SenderKeyStateStructure.SenderMessageKey senderMessageKeys = 4;</code>
+     */
+    java.util.List<org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey> 
+        getSenderMessageKeysList();
+    /**
+     * <code>repeated .textsecure.SenderKeyStateStructure.SenderMessageKey senderMessageKeys = 4;</code>
+     */
+    org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey getSenderMessageKeys(int index);
+    /**
+     * <code>repeated .textsecure.SenderKeyStateStructure.SenderMessageKey senderMessageKeys = 4;</code>
+     */
+    int getSenderMessageKeysCount();
+    /**
+     * <code>repeated .textsecure.SenderKeyStateStructure.SenderMessageKey senderMessageKeys = 4;</code>
+     */
+    java.util.List<? extends org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKeyOrBuilder> 
+        getSenderMessageKeysOrBuilderList();
+    /**
+     * <code>repeated .textsecure.SenderKeyStateStructure.SenderMessageKey senderMessageKeys = 4;</code>
+     */
+    org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKeyOrBuilder getSenderMessageKeysOrBuilder(
+        int index);
+  }
+  /**
+   * Protobuf type {@code textsecure.SenderKeyStateStructure}
+   */
+  public static final class SenderKeyStateStructure extends
+      com.google.protobuf.GeneratedMessage
+      implements SenderKeyStateStructureOrBuilder {
+    // Use SenderKeyStateStructure.newBuilder() to construct.
+    private SenderKeyStateStructure(com.google.protobuf.GeneratedMessage.Builder<?> builder) {
+      super(builder);
+      this.unknownFields = builder.getUnknownFields();
+    }
+    private SenderKeyStateStructure(boolean noInit) { this.unknownFields = com.google.protobuf.UnknownFieldSet.getDefaultInstance(); }
+
+    private static final SenderKeyStateStructure defaultInstance;
+    public static SenderKeyStateStructure getDefaultInstance() {
+      return defaultInstance;
+    }
+
+    public SenderKeyStateStructure getDefaultInstanceForType() {
+      return defaultInstance;
+    }
+
+    private final com.google.protobuf.UnknownFieldSet unknownFields;
+    @java.lang.Override
+    public final com.google.protobuf.UnknownFieldSet
+        getUnknownFields() {
+      return this.unknownFields;
+    }
+    private SenderKeyStateStructure(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      initFields();
+      int mutable_bitField0_ = 0;
+      com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+          com.google.protobuf.UnknownFieldSet.newBuilder();
+      try {
+        boolean done = false;
+        while (!done) {
+          int tag = input.readTag();
+          switch (tag) {
+            case 0:
+              done = true;
+              break;
+            default: {
+              if (!parseUnknownField(input, unknownFields,
+                                     extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+            case 8: {
+              bitField0_ |= 0x00000001;
+              senderKeyId_ = input.readUInt32();
+              break;
+            }
+            case 18: {
+              org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey.Builder subBuilder = null;
+              if (((bitField0_ & 0x00000002) == 0x00000002)) {
+                subBuilder = senderChainKey_.toBuilder();
+              }
+              senderChainKey_ = input.readMessage(org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey.PARSER, extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(senderChainKey_);
+                senderChainKey_ = subBuilder.buildPartial();
+              }
+              bitField0_ |= 0x00000002;
+              break;
+            }
+            case 26: {
+              org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKey.Builder subBuilder = null;
+              if (((bitField0_ & 0x00000004) == 0x00000004)) {
+                subBuilder = senderSigningKey_.toBuilder();
+              }
+              senderSigningKey_ = input.readMessage(org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKey.PARSER, extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(senderSigningKey_);
+                senderSigningKey_ = subBuilder.buildPartial();
+              }
+              bitField0_ |= 0x00000004;
+              break;
+            }
+            case 34: {
+              if (!((mutable_bitField0_ & 0x00000008) == 0x00000008)) {
+                senderMessageKeys_ = new java.util.ArrayList<org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey>();
+                mutable_bitField0_ |= 0x00000008;
+              }
+              senderMessageKeys_.add(input.readMessage(org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey.PARSER, extensionRegistry));
+              break;
+            }
+          }
+        }
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        throw e.setUnfinishedMessage(this);
+      } catch (java.io.IOException e) {
+        throw new com.google.protobuf.InvalidProtocolBufferException(
+            e.getMessage()).setUnfinishedMessage(this);
+      } finally {
+        if (((mutable_bitField0_ & 0x00000008) == 0x00000008)) {
+          senderMessageKeys_ = java.util.Collections.unmodifiableList(senderMessageKeys_);
+        }
+        this.unknownFields = unknownFields.build();
+        makeExtensionsImmutable();
+      }
+    }
+    public static final com.google.protobuf.Descriptors.Descriptor
+        getDescriptor() {
+      return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SenderKeyStateStructure_descriptor;
+    }
+
+    protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SenderKeyStateStructure_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.class, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.Builder.class);
+    }
+
+    public static com.google.protobuf.Parser<SenderKeyStateStructure> PARSER =
+        new com.google.protobuf.AbstractParser<SenderKeyStateStructure>() {
+      public SenderKeyStateStructure parsePartialFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return new SenderKeyStateStructure(input, extensionRegistry);
+      }
+    };
+
+    @java.lang.Override
+    public com.google.protobuf.Parser<SenderKeyStateStructure> getParserForType() {
+      return PARSER;
+    }
+
+    public interface SenderChainKeyOrBuilder
+        extends com.google.protobuf.MessageOrBuilder {
+
+      // optional uint32 iteration = 1;
+      /**
+       * <code>optional uint32 iteration = 1;</code>
+       */
+      boolean hasIteration();
+      /**
+       * <code>optional uint32 iteration = 1;</code>
+       */
+      int getIteration();
+
+      // optional bytes seed = 2;
+      /**
+       * <code>optional bytes seed = 2;</code>
+       */
+      boolean hasSeed();
+      /**
+       * <code>optional bytes seed = 2;</code>
+       */
+      com.google.protobuf.ByteString getSeed();
+    }
+    /**
+     * Protobuf type {@code textsecure.SenderKeyStateStructure.SenderChainKey}
+     */
+    public static final class SenderChainKey extends
+        com.google.protobuf.GeneratedMessage
+        implements SenderChainKeyOrBuilder {
+      // Use SenderChainKey.newBuilder() to construct.
+      private SenderChainKey(com.google.protobuf.GeneratedMessage.Builder<?> builder) {
+        super(builder);
+        this.unknownFields = builder.getUnknownFields();
+      }
+      private SenderChainKey(boolean noInit) { this.unknownFields = com.google.protobuf.UnknownFieldSet.getDefaultInstance(); }
+
+      private static final SenderChainKey defaultInstance;
+      public static SenderChainKey getDefaultInstance() {
+        return defaultInstance;
+      }
+
+      public SenderChainKey getDefaultInstanceForType() {
+        return defaultInstance;
+      }
+
+      private final com.google.protobuf.UnknownFieldSet unknownFields;
+      @java.lang.Override
+      public final com.google.protobuf.UnknownFieldSet
+          getUnknownFields() {
+        return this.unknownFields;
+      }
+      private SenderChainKey(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        initFields();
+        int mutable_bitField0_ = 0;
+        com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+            com.google.protobuf.UnknownFieldSet.newBuilder();
+        try {
+          boolean done = false;
+          while (!done) {
+            int tag = input.readTag();
+            switch (tag) {
+              case 0:
+                done = true;
+                break;
+              default: {
+                if (!parseUnknownField(input, unknownFields,
+                                       extensionRegistry, tag)) {
+                  done = true;
+                }
+                break;
+              }
+              case 8: {
+                bitField0_ |= 0x00000001;
+                iteration_ = input.readUInt32();
+                break;
+              }
+              case 18: {
+                bitField0_ |= 0x00000002;
+                seed_ = input.readBytes();
+                break;
+              }
+            }
+          }
+        } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+          throw e.setUnfinishedMessage(this);
+        } catch (java.io.IOException e) {
+          throw new com.google.protobuf.InvalidProtocolBufferException(
+              e.getMessage()).setUnfinishedMessage(this);
+        } finally {
+          this.unknownFields = unknownFields.build();
+          makeExtensionsImmutable();
+        }
+      }
+      public static final com.google.protobuf.Descriptors.Descriptor
+          getDescriptor() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SenderKeyStateStructure_SenderChainKey_descriptor;
+      }
+
+      protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+          internalGetFieldAccessorTable() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SenderKeyStateStructure_SenderChainKey_fieldAccessorTable
+            .ensureFieldAccessorsInitialized(
+                org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey.class, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey.Builder.class);
+      }
+
+      public static com.google.protobuf.Parser<SenderChainKey> PARSER =
+          new com.google.protobuf.AbstractParser<SenderChainKey>() {
+        public SenderChainKey parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new SenderChainKey(input, extensionRegistry);
+        }
+      };
+
+      @java.lang.Override
+      public com.google.protobuf.Parser<SenderChainKey> getParserForType() {
+        return PARSER;
+      }
+
+      private int bitField0_;
+      // optional uint32 iteration = 1;
+      public static final int ITERATION_FIELD_NUMBER = 1;
+      private int iteration_;
+      /**
+       * <code>optional uint32 iteration = 1;</code>
+       */
+      public boolean hasIteration() {
+        return ((bitField0_ & 0x00000001) == 0x00000001);
+      }
+      /**
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+      @java.lang.Override
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+          throws java.io.ObjectStreamException {
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+      public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey parseFrom(
+          com.google.protobuf.ByteString data)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data);
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+      public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey parseFrom(
+          com.google.protobuf.ByteString data,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data, extensionRegistry);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey parseFrom(byte[] data)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey parseFrom(
+          byte[] data,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data, extensionRegistry);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey parseFrom(java.io.InputStream input)
+          throws java.io.IOException {
+        return PARSER.parseFrom(input);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey parseFrom(
+          java.io.InputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        return PARSER.parseFrom(input, extensionRegistry);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey parseDelimitedFrom(java.io.InputStream input)
+          throws java.io.IOException {
+        return PARSER.parseDelimitedFrom(input);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey parseDelimitedFrom(
+          java.io.InputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        return PARSER.parseDelimitedFrom(input, extensionRegistry);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey parseFrom(
+          com.google.protobuf.CodedInputStream input)
+          throws java.io.IOException {
+        return PARSER.parseFrom(input);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey parseFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        return PARSER.parseFrom(input, extensionRegistry);
+      }
+
+      public static Builder newBuilder() { return Builder.create(); }
+      public Builder newBuilderForType() { return newBuilder(); }
+      public static Builder newBuilder(org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey prototype) {
+        return newBuilder().mergeFrom(prototype);
+      }
+      public Builder toBuilder() { return newBuilder(this); }
+
+      @java.lang.Override
+      protected Builder newBuilderForType(
+          com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+        Builder builder = new Builder(parent);
+        return builder;
+      }
+      /**
+       * Protobuf type {@code textsecure.SenderKeyStateStructure.SenderChainKey}
+       */
+      public static final class Builder extends
+          com.google.protobuf.GeneratedMessage.Builder<Builder>
+         implements org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKeyOrBuilder {
+        public static final com.google.protobuf.Descriptors.Descriptor
+            getDescriptor() {
+          return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SenderKeyStateStructure_SenderChainKey_descriptor;
+        }
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+        }
+
+        // Construct using org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey.newBuilder()
+        private Builder() {
+          maybeForceBuilderInitialization();
+        }
+
+        private Builder(
+            com.google.protobuf.GeneratedMessage.BuilderParent parent) {
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+          maybeForceBuilderInitialization();
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+          super.clear();
+          iteration_ = 0;
+          bitField0_ = (bitField0_ & ~0x00000001);
+          seed_ = com.google.protobuf.ByteString.EMPTY;
+          bitField0_ = (bitField0_ & ~0x00000002);
+          return this;
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+
+        public Builder clone() {
+          return create().mergeFrom(buildPartial());
+        }
+
+        public com.google.protobuf.Descriptors.Descriptor
+            getDescriptorForType() {
+          return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SenderKeyStateStructure_SenderChainKey_descriptor;
+        }
+
+        public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey getDefaultInstanceForType() {
+          return org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey.getDefaultInstance();
+        }
+
+        public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey build() {
+          org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey result = buildPartial();
+          if (!result.isInitialized()) {
+            throw newUninitializedMessageException(result);
+          }
+          return result;
+        }
+
+        public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey buildPartial() {
+          org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey result = new org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey(this);
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+          onBuilt();
+          return result;
+        }
+
+        public Builder mergeFrom(com.google.protobuf.Message other) {
+          if (other instanceof org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey) {
+            return mergeFrom((org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey)other);
+          } else {
+            super.mergeFrom(other);
+            return this;
+          }
+        }
+
+        public Builder mergeFrom(org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey other) {
+          if (other == org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey.getDefaultInstance()) return this;
+          if (other.hasIteration()) {
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+          if (other.hasSeed()) {
+            setSeed(other.getSeed());
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+          this.mergeUnknownFields(other.getUnknownFields());
+          return this;
+        }
+
+        public final boolean isInitialized() {
+          return true;
+        }
+
+        public Builder mergeFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws java.io.IOException {
+          org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey parsedMessage = null;
+          try {
+            parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+          } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+            parsedMessage = (org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey) e.getUnfinishedMessage();
+            throw e;
+          } finally {
+            if (parsedMessage != null) {
+              mergeFrom(parsedMessage);
+            }
+          }
+          return this;
+        }
+        private int bitField0_;
+
+        // optional uint32 iteration = 1;
+        private int iteration_ ;
+        /**
+         * <code>optional uint32 iteration = 1;</code>
+         */
+        public boolean hasIteration() {
+          return ((bitField0_ & 0x00000001) == 0x00000001);
+        }
+        /**
+         * <code>optional uint32 iteration = 1;</code>
+         */
+        public int getIteration() {
+          return iteration_;
+        }
+        /**
+         * <code>optional uint32 iteration = 1;</code>
+         */
+        public Builder setIteration(int value) {
+          bitField0_ |= 0x00000001;
+          iteration_ = value;
+          onChanged();
+          return this;
+        }
+        /**
+         * <code>optional uint32 iteration = 1;</code>
+         */
+        public Builder clearIteration() {
+          bitField0_ = (bitField0_ & ~0x00000001);
+          iteration_ = 0;
+          onChanged();
+          return this;
+        }
+
+        // optional bytes seed = 2;
+        private com.google.protobuf.ByteString seed_ = com.google.protobuf.ByteString.EMPTY;
+        /**
+         * <code>optional bytes seed = 2;</code>
+         */
+        public boolean hasSeed() {
+          return ((bitField0_ & 0x00000002) == 0x00000002);
+        }
+        /**
+         * <code>optional bytes seed = 2;</code>
+         */
+        public com.google.protobuf.ByteString getSeed() {
+          return seed_;
+        }
+        /**
+         * <code>optional bytes seed = 2;</code>
+         */
+        public Builder setSeed(com.google.protobuf.ByteString value) {
+          if (value == null) {
+    throw new NullPointerException();
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+  bitField0_ |= 0x00000002;
+          seed_ = value;
+          onChanged();
+          return this;
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+        /**
+         * <code>optional bytes seed = 2;</code>
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+        public Builder clearSeed() {
+          bitField0_ = (bitField0_ & ~0x00000002);
+          seed_ = getDefaultInstance().getSeed();
+          onChanged();
+          return this;
+        }
+
+        // @@protoc_insertion_point(builder_scope:textsecure.SenderKeyStateStructure.SenderChainKey)
+      }
+
+      static {
+        defaultInstance = new SenderChainKey(true);
+        defaultInstance.initFields();
+      }
+
+      // @@protoc_insertion_point(class_scope:textsecure.SenderKeyStateStructure.SenderChainKey)
+    }
+
+    public interface SenderMessageKeyOrBuilder
+        extends com.google.protobuf.MessageOrBuilder {
+
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+      /**
+       * <code>optional uint32 iteration = 1;</code>
+       */
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+      /**
+       * <code>optional uint32 iteration = 1;</code>
+       */
+      int getIteration();
+
+      // optional bytes seed = 2;
+      /**
+       * <code>optional bytes seed = 2;</code>
+       */
+      boolean hasSeed();
+      /**
+       * <code>optional bytes seed = 2;</code>
+       */
+      com.google.protobuf.ByteString getSeed();
+    }
+    /**
+     * Protobuf type {@code textsecure.SenderKeyStateStructure.SenderMessageKey}
+     */
+    public static final class SenderMessageKey extends
+        com.google.protobuf.GeneratedMessage
+        implements SenderMessageKeyOrBuilder {
+      // Use SenderMessageKey.newBuilder() to construct.
+      private SenderMessageKey(com.google.protobuf.GeneratedMessage.Builder<?> builder) {
+        super(builder);
+        this.unknownFields = builder.getUnknownFields();
+      }
+      private SenderMessageKey(boolean noInit) { this.unknownFields = com.google.protobuf.UnknownFieldSet.getDefaultInstance(); }
+
+      private static final SenderMessageKey defaultInstance;
+      public static SenderMessageKey getDefaultInstance() {
+        return defaultInstance;
+      }
+
+      public SenderMessageKey getDefaultInstanceForType() {
+        return defaultInstance;
+      }
+
+      private final com.google.protobuf.UnknownFieldSet unknownFields;
+      @java.lang.Override
+      public final com.google.protobuf.UnknownFieldSet
+          getUnknownFields() {
+        return this.unknownFields;
+      }
+      private SenderMessageKey(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        initFields();
+        int mutable_bitField0_ = 0;
+        com.google.protobuf.UnknownFieldSet.Builder unknownFields =
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+        try {
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+                seed_ = input.readBytes();
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+        } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+          throw e.setUnfinishedMessage(this);
+        } catch (java.io.IOException e) {
+          throw new com.google.protobuf.InvalidProtocolBufferException(
+              e.getMessage()).setUnfinishedMessage(this);
+        } finally {
+          this.unknownFields = unknownFields.build();
+          makeExtensionsImmutable();
+        }
+      }
+      public static final com.google.protobuf.Descriptors.Descriptor
+          getDescriptor() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SenderKeyStateStructure_SenderMessageKey_descriptor;
+      }
+
+      protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+          internalGetFieldAccessorTable() {
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+            .ensureFieldAccessorsInitialized(
+                org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey.class, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey.Builder.class);
+      }
+
+      public static com.google.protobuf.Parser<SenderMessageKey> PARSER =
+          new com.google.protobuf.AbstractParser<SenderMessageKey>() {
+        public SenderMessageKey parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new SenderMessageKey(input, extensionRegistry);
+        }
+      };
+
+      @java.lang.Override
+      public com.google.protobuf.Parser<SenderMessageKey> getParserForType() {
+        return PARSER;
+      }
+
+      private int bitField0_;
+      // optional uint32 iteration = 1;
+      public static final int ITERATION_FIELD_NUMBER = 1;
+      private int iteration_;
+      /**
+       * <code>optional uint32 iteration = 1;</code>
+       */
+      public boolean hasIteration() {
+        return ((bitField0_ & 0x00000001) == 0x00000001);
+      }
+      /**
+       * <code>optional uint32 iteration = 1;</code>
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+        return iteration_;
+      }
+
+      // optional bytes seed = 2;
+      public static final int SEED_FIELD_NUMBER = 2;
+      private com.google.protobuf.ByteString seed_;
+      /**
+       * <code>optional bytes seed = 2;</code>
+       */
+      public boolean hasSeed() {
+        return ((bitField0_ & 0x00000002) == 0x00000002);
+      }
+      /**
+       * <code>optional bytes seed = 2;</code>
+       */
+      public com.google.protobuf.ByteString getSeed() {
+        return seed_;
+      }
+
+      private void initFields() {
+        iteration_ = 0;
+        seed_ = com.google.protobuf.ByteString.EMPTY;
+      }
+      private byte memoizedIsInitialized = -1;
+      public final boolean isInitialized() {
+        byte isInitialized = memoizedIsInitialized;
+        if (isInitialized != -1) return isInitialized == 1;
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+        return true;
+      }
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+          output.writeUInt32(1, iteration_);
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+      @java.lang.Override
+      protected java.lang.Object writeReplace()
+          throws java.io.ObjectStreamException {
+        return super.writeReplace();
+      }
+
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey parseFrom(
+          com.google.protobuf.ByteString data)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey parseFrom(
+          com.google.protobuf.ByteString data,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data, extensionRegistry);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey parseFrom(byte[] data)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey parseFrom(
+          byte[] data,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data, extensionRegistry);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey parseFrom(java.io.InputStream input)
+          throws java.io.IOException {
+        return PARSER.parseFrom(input);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey parseFrom(
+          java.io.InputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        return PARSER.parseFrom(input, extensionRegistry);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey parseDelimitedFrom(java.io.InputStream input)
+          throws java.io.IOException {
+        return PARSER.parseDelimitedFrom(input);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey parseDelimitedFrom(
+          java.io.InputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        return PARSER.parseDelimitedFrom(input, extensionRegistry);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey parseFrom(
+          com.google.protobuf.CodedInputStream input)
+          throws java.io.IOException {
+        return PARSER.parseFrom(input);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey parseFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        return PARSER.parseFrom(input, extensionRegistry);
+      }
+
+      public static Builder newBuilder() { return Builder.create(); }
+      public Builder newBuilderForType() { return newBuilder(); }
+      public static Builder newBuilder(org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey prototype) {
+        return newBuilder().mergeFrom(prototype);
+      }
+      public Builder toBuilder() { return newBuilder(this); }
+
+      @java.lang.Override
+      protected Builder newBuilderForType(
+          com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+        Builder builder = new Builder(parent);
+        return builder;
+      }
+      /**
+       * Protobuf type {@code textsecure.SenderKeyStateStructure.SenderMessageKey}
+       */
+      public static final class Builder extends
+          com.google.protobuf.GeneratedMessage.Builder<Builder>
+         implements org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKeyOrBuilder {
+        public static final com.google.protobuf.Descriptors.Descriptor
+            getDescriptor() {
+          return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SenderKeyStateStructure_SenderMessageKey_descriptor;
+        }
+
+        protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
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+        }
+
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+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data);
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+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data, extensionRegistry);
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+          throws com.google.protobuf.InvalidProtocolBufferException {
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+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data, extensionRegistry);
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+          throws java.io.IOException {
+        return PARSER.parseFrom(input);
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+      public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKey parseFrom(
+          java.io.InputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        return PARSER.parseFrom(input, extensionRegistry);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKey parseDelimitedFrom(java.io.InputStream input)
+          throws java.io.IOException {
+        return PARSER.parseDelimitedFrom(input);
+      }
+      public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKey parseDelimitedFrom(
+          java.io.InputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        return PARSER.parseDelimitedFrom(input, extensionRegistry);
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+      public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKey parseFrom(
+          com.google.protobuf.CodedInputStream input)
+          throws java.io.IOException {
+        return PARSER.parseFrom(input);
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+      public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKey parseFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        return PARSER.parseFrom(input, extensionRegistry);
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+
+      public static Builder newBuilder() { return Builder.create(); }
+      public Builder newBuilderForType() { return newBuilder(); }
+      public static Builder newBuilder(org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKey prototype) {
+        return newBuilder().mergeFrom(prototype);
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+      public Builder toBuilder() { return newBuilder(this); }
+
+      @java.lang.Override
+      protected Builder newBuilderForType(
+          com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+        Builder builder = new Builder(parent);
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+      /**
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+      public static final class Builder extends
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+        // Construct using org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKey.newBuilder()
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+        private Builder(
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+        public Builder clone() {
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+          return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SenderKeyStateStructure_SenderSigningKey_descriptor;
+        }
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+        public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKey getDefaultInstanceForType() {
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+        public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKey build() {
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+        public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKey buildPartial() {
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+        public Builder mergeFrom(com.google.protobuf.Message other) {
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+        public Builder mergeFrom(
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+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws java.io.IOException {
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+  bitField0_ |= 0x00000001;
+          public_ = value;
+          onChanged();
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+        public Builder clearPrivate() {
+          bitField0_ = (bitField0_ & ~0x00000002);
+          private_ = getDefaultInstance().getPrivate();
+          onChanged();
+          return this;
+        }
+
+        // @@protoc_insertion_point(builder_scope:textsecure.SenderKeyStateStructure.SenderSigningKey)
+      }
+
+      static {
+        defaultInstance = new SenderSigningKey(true);
+        defaultInstance.initFields();
+      }
+
+      // @@protoc_insertion_point(class_scope:textsecure.SenderKeyStateStructure.SenderSigningKey)
+    }
+
+    private int bitField0_;
+    // optional uint32 senderKeyId = 1;
+    public static final int SENDERKEYID_FIELD_NUMBER = 1;
+    private int senderKeyId_;
+    /**
+     * <code>optional uint32 senderKeyId = 1;</code>
+     */
+    public boolean hasSenderKeyId() {
+      return ((bitField0_ & 0x00000001) == 0x00000001);
+    }
+    /**
+     * <code>optional uint32 senderKeyId = 1;</code>
+     */
+    public int getSenderKeyId() {
+      return senderKeyId_;
+    }
+
+    // optional .textsecure.SenderKeyStateStructure.SenderChainKey senderChainKey = 2;
+    public static final int SENDERCHAINKEY_FIELD_NUMBER = 2;
+    private org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey senderChainKey_;
+    /**
+     * <code>optional .textsecure.SenderKeyStateStructure.SenderChainKey senderChainKey = 2;</code>
+     */
+    public boolean hasSenderChainKey() {
+      return ((bitField0_ & 0x00000002) == 0x00000002);
+    }
+    /**
+     * <code>optional .textsecure.SenderKeyStateStructure.SenderChainKey senderChainKey = 2;</code>
+     */
+    public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey getSenderChainKey() {
+      return senderChainKey_;
+    }
+    /**
+     * <code>optional .textsecure.SenderKeyStateStructure.SenderChainKey senderChainKey = 2;</code>
+     */
+    public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKeyOrBuilder getSenderChainKeyOrBuilder() {
+      return senderChainKey_;
+    }
+
+    // optional .textsecure.SenderKeyStateStructure.SenderSigningKey senderSigningKey = 3;
+    public static final int SENDERSIGNINGKEY_FIELD_NUMBER = 3;
+    private org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKey senderSigningKey_;
+    /**
+     * <code>optional .textsecure.SenderKeyStateStructure.SenderSigningKey senderSigningKey = 3;</code>
+     */
+    public boolean hasSenderSigningKey() {
+      return ((bitField0_ & 0x00000004) == 0x00000004);
+    }
+    /**
+     * <code>optional .textsecure.SenderKeyStateStructure.SenderSigningKey senderSigningKey = 3;</code>
+     */
+    public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKey getSenderSigningKey() {
+      return senderSigningKey_;
+    }
+    /**
+     * <code>optional .textsecure.SenderKeyStateStructure.SenderSigningKey senderSigningKey = 3;</code>
+     */
+    public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKeyOrBuilder getSenderSigningKeyOrBuilder() {
+      return senderSigningKey_;
+    }
+
+    // repeated .textsecure.SenderKeyStateStructure.SenderMessageKey senderMessageKeys = 4;
+    public static final int SENDERMESSAGEKEYS_FIELD_NUMBER = 4;
+    private java.util.List<org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey> senderMessageKeys_;
+    /**
+     * <code>repeated .textsecure.SenderKeyStateStructure.SenderMessageKey senderMessageKeys = 4;</code>
+     */
+    public java.util.List<org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey> getSenderMessageKeysList() {
+      return senderMessageKeys_;
+    }
+    /**
+     * <code>repeated .textsecure.SenderKeyStateStructure.SenderMessageKey senderMessageKeys = 4;</code>
+     */
+    public java.util.List<? extends org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKeyOrBuilder> 
+        getSenderMessageKeysOrBuilderList() {
+      return senderMessageKeys_;
+    }
+    /**
+     * <code>repeated .textsecure.SenderKeyStateStructure.SenderMessageKey senderMessageKeys = 4;</code>
+     */
+    public int getSenderMessageKeysCount() {
+      return senderMessageKeys_.size();
+    }
+    /**
+     * <code>repeated .textsecure.SenderKeyStateStructure.SenderMessageKey senderMessageKeys = 4;</code>
+     */
+    public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey getSenderMessageKeys(int index) {
+      return senderMessageKeys_.get(index);
+    }
+    /**
+     * <code>repeated .textsecure.SenderKeyStateStructure.SenderMessageKey senderMessageKeys = 4;</code>
+     */
+    public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKeyOrBuilder getSenderMessageKeysOrBuilder(
+        int index) {
+      return senderMessageKeys_.get(index);
+    }
+
+    private void initFields() {
+      senderKeyId_ = 0;
+      senderChainKey_ = org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey.getDefaultInstance();
+      senderSigningKey_ = org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKey.getDefaultInstance();
+      senderMessageKeys_ = java.util.Collections.emptyList();
+    }
+    private byte memoizedIsInitialized = -1;
+    public final boolean isInitialized() {
+      byte isInitialized = memoizedIsInitialized;
+      if (isInitialized != -1) return isInitialized == 1;
+
+      memoizedIsInitialized = 1;
+      return true;
+    }
+
+    public void writeTo(com.google.protobuf.CodedOutputStream output)
+                        throws java.io.IOException {
+      getSerializedSize();
+      if (((bitField0_ & 0x00000001) == 0x00000001)) {
+        output.writeUInt32(1, senderKeyId_);
+      }
+      if (((bitField0_ & 0x00000002) == 0x00000002)) {
+        output.writeMessage(2, senderChainKey_);
+      }
+      if (((bitField0_ & 0x00000004) == 0x00000004)) {
+        output.writeMessage(3, senderSigningKey_);
+      }
+      for (int i = 0; i < senderMessageKeys_.size(); i++) {
+        output.writeMessage(4, senderMessageKeys_.get(i));
+      }
+      getUnknownFields().writeTo(output);
+    }
+
+    private int memoizedSerializedSize = -1;
+    public int getSerializedSize() {
+      int size = memoizedSerializedSize;
+      if (size != -1) return size;
+
+      size = 0;
+      if (((bitField0_ & 0x00000001) == 0x00000001)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeUInt32Size(1, senderKeyId_);
+      }
+      if (((bitField0_ & 0x00000002) == 0x00000002)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeMessageSize(2, senderChainKey_);
+      }
+      if (((bitField0_ & 0x00000004) == 0x00000004)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeMessageSize(3, senderSigningKey_);
+      }
+      for (int i = 0; i < senderMessageKeys_.size(); i++) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeMessageSize(4, senderMessageKeys_.get(i));
+      }
+      size += getUnknownFields().getSerializedSize();
+      memoizedSerializedSize = size;
+      return size;
+    }
+
+    private static final long serialVersionUID = 0L;
+    @java.lang.Override
+    protected java.lang.Object writeReplace()
+        throws java.io.ObjectStreamException {
+      return super.writeReplace();
+    }
+
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure parseFrom(
+        com.google.protobuf.ByteString data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure parseFrom(
+        com.google.protobuf.ByteString data,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data, extensionRegistry);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure parseFrom(byte[] data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure parseFrom(
+        byte[] data,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data, extensionRegistry);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure parseFrom(java.io.InputStream input)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure parseFrom(
+        java.io.InputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input, extensionRegistry);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure parseDelimitedFrom(java.io.InputStream input)
+        throws java.io.IOException {
+      return PARSER.parseDelimitedFrom(input);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure parseDelimitedFrom(
+        java.io.InputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return PARSER.parseDelimitedFrom(input, extensionRegistry);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure parseFrom(
+        com.google.protobuf.CodedInputStream input)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure parseFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input, extensionRegistry);
+    }
+
+    public static Builder newBuilder() { return Builder.create(); }
+    public Builder newBuilderForType() { return newBuilder(); }
+    public static Builder newBuilder(org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure prototype) {
+      return newBuilder().mergeFrom(prototype);
+    }
+    public Builder toBuilder() { return newBuilder(this); }
+
+    @java.lang.Override
+    protected Builder newBuilderForType(
+        com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+      Builder builder = new Builder(parent);
+      return builder;
+    }
+    /**
+     * Protobuf type {@code textsecure.SenderKeyStateStructure}
+     */
+    public static final class Builder extends
+        com.google.protobuf.GeneratedMessage.Builder<Builder>
+       implements org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructureOrBuilder {
+      public static final com.google.protobuf.Descriptors.Descriptor
+          getDescriptor() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SenderKeyStateStructure_descriptor;
+      }
+
+      protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+          internalGetFieldAccessorTable() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SenderKeyStateStructure_fieldAccessorTable
+            .ensureFieldAccessorsInitialized(
+                org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.class, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.Builder.class);
+      }
+
+      // Construct using org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.newBuilder()
+      private Builder() {
+        maybeForceBuilderInitialization();
+      }
+
+      private Builder(
+          com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+        super(parent);
+        maybeForceBuilderInitialization();
+      }
+      private void maybeForceBuilderInitialization() {
+        if (com.google.protobuf.GeneratedMessage.alwaysUseFieldBuilders) {
+          getSenderChainKeyFieldBuilder();
+          getSenderSigningKeyFieldBuilder();
+          getSenderMessageKeysFieldBuilder();
+        }
+      }
+      private static Builder create() {
+        return new Builder();
+      }
+
+      public Builder clear() {
+        super.clear();
+        senderKeyId_ = 0;
+        bitField0_ = (bitField0_ & ~0x00000001);
+        if (senderChainKeyBuilder_ == null) {
+          senderChainKey_ = org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey.getDefaultInstance();
+        } else {
+          senderChainKeyBuilder_.clear();
+        }
+        bitField0_ = (bitField0_ & ~0x00000002);
+        if (senderSigningKeyBuilder_ == null) {
+          senderSigningKey_ = org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKey.getDefaultInstance();
+        } else {
+          senderSigningKeyBuilder_.clear();
+        }
+        bitField0_ = (bitField0_ & ~0x00000004);
+        if (senderMessageKeysBuilder_ == null) {
+          senderMessageKeys_ = java.util.Collections.emptyList();
+          bitField0_ = (bitField0_ & ~0x00000008);
+        } else {
+          senderMessageKeysBuilder_.clear();
+        }
+        return this;
+      }
+
+      public Builder clone() {
+        return create().mergeFrom(buildPartial());
+      }
+
+      public com.google.protobuf.Descriptors.Descriptor
+          getDescriptorForType() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SenderKeyStateStructure_descriptor;
+      }
+
+      public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure getDefaultInstanceForType() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.getDefaultInstance();
+      }
+
+      public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure build() {
+        org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure result = buildPartial();
+        if (!result.isInitialized()) {
+          throw newUninitializedMessageException(result);
+        }
+        return result;
+      }
+
+      public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure buildPartial() {
+        org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure result = new org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure(this);
+        int from_bitField0_ = bitField0_;
+        int to_bitField0_ = 0;
+        if (((from_bitField0_ & 0x00000001) == 0x00000001)) {
+          to_bitField0_ |= 0x00000001;
+        }
+        result.senderKeyId_ = senderKeyId_;
+        if (((from_bitField0_ & 0x00000002) == 0x00000002)) {
+          to_bitField0_ |= 0x00000002;
+        }
+        if (senderChainKeyBuilder_ == null) {
+          result.senderChainKey_ = senderChainKey_;
+        } else {
+          result.senderChainKey_ = senderChainKeyBuilder_.build();
+        }
+        if (((from_bitField0_ & 0x00000004) == 0x00000004)) {
+          to_bitField0_ |= 0x00000004;
+        }
+        if (senderSigningKeyBuilder_ == null) {
+          result.senderSigningKey_ = senderSigningKey_;
+        } else {
+          result.senderSigningKey_ = senderSigningKeyBuilder_.build();
+        }
+        if (senderMessageKeysBuilder_ == null) {
+          if (((bitField0_ & 0x00000008) == 0x00000008)) {
+            senderMessageKeys_ = java.util.Collections.unmodifiableList(senderMessageKeys_);
+            bitField0_ = (bitField0_ & ~0x00000008);
+          }
+          result.senderMessageKeys_ = senderMessageKeys_;
+        } else {
+          result.senderMessageKeys_ = senderMessageKeysBuilder_.build();
+        }
+        result.bitField0_ = to_bitField0_;
+        onBuilt();
+        return result;
+      }
+
+      public Builder mergeFrom(com.google.protobuf.Message other) {
+        if (other instanceof org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure) {
+          return mergeFrom((org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure)other);
+        } else {
+          super.mergeFrom(other);
+          return this;
+        }
+      }
+
+      public Builder mergeFrom(org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure other) {
+        if (other == org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.getDefaultInstance()) return this;
+        if (other.hasSenderKeyId()) {
+          setSenderKeyId(other.getSenderKeyId());
+        }
+        if (other.hasSenderChainKey()) {
+          mergeSenderChainKey(other.getSenderChainKey());
+        }
+        if (other.hasSenderSigningKey()) {
+          mergeSenderSigningKey(other.getSenderSigningKey());
+        }
+        if (senderMessageKeysBuilder_ == null) {
+          if (!other.senderMessageKeys_.isEmpty()) {
+            if (senderMessageKeys_.isEmpty()) {
+              senderMessageKeys_ = other.senderMessageKeys_;
+              bitField0_ = (bitField0_ & ~0x00000008);
+            } else {
+              ensureSenderMessageKeysIsMutable();
+              senderMessageKeys_.addAll(other.senderMessageKeys_);
+            }
+            onChanged();
+          }
+        } else {
+          if (!other.senderMessageKeys_.isEmpty()) {
+            if (senderMessageKeysBuilder_.isEmpty()) {
+              senderMessageKeysBuilder_.dispose();
+              senderMessageKeysBuilder_ = null;
+              senderMessageKeys_ = other.senderMessageKeys_;
+              bitField0_ = (bitField0_ & ~0x00000008);
+              senderMessageKeysBuilder_ = 
+                com.google.protobuf.GeneratedMessage.alwaysUseFieldBuilders ?
+                   getSenderMessageKeysFieldBuilder() : null;
+            } else {
+              senderMessageKeysBuilder_.addAllMessages(other.senderMessageKeys_);
+            }
+          }
+        }
+        this.mergeUnknownFields(other.getUnknownFields());
+        return this;
+      }
+
+      public final boolean isInitialized() {
+        return true;
+      }
+
+      public Builder mergeFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure parsedMessage = null;
+        try {
+          parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+        } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+          parsedMessage = (org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure) e.getUnfinishedMessage();
+          throw e;
+        } finally {
+          if (parsedMessage != null) {
+            mergeFrom(parsedMessage);
+          }
+        }
+        return this;
+      }
+      private int bitField0_;
+
+      // optional uint32 senderKeyId = 1;
+      private int senderKeyId_ ;
+      /**
+       * <code>optional uint32 senderKeyId = 1;</code>
+       */
+      public boolean hasSenderKeyId() {
+        return ((bitField0_ & 0x00000001) == 0x00000001);
+      }
+      /**
+       * <code>optional uint32 senderKeyId = 1;</code>
+       */
+      public int getSenderKeyId() {
+        return senderKeyId_;
+      }
+      /**
+       * <code>optional uint32 senderKeyId = 1;</code>
+       */
+      public Builder setSenderKeyId(int value) {
+        bitField0_ |= 0x00000001;
+        senderKeyId_ = value;
+        onChanged();
+        return this;
+      }
+      /**
+       * <code>optional uint32 senderKeyId = 1;</code>
+       */
+      public Builder clearSenderKeyId() {
+        bitField0_ = (bitField0_ & ~0x00000001);
+        senderKeyId_ = 0;
+        onChanged();
+        return this;
+      }
+
+      // optional .textsecure.SenderKeyStateStructure.SenderChainKey senderChainKey = 2;
+      private org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey senderChainKey_ = org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey.getDefaultInstance();
+      private com.google.protobuf.SingleFieldBuilder<
+          org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKeyOrBuilder> senderChainKeyBuilder_;
+      /**
+       * <code>optional .textsecure.SenderKeyStateStructure.SenderChainKey senderChainKey = 2;</code>
+       */
+      public boolean hasSenderChainKey() {
+        return ((bitField0_ & 0x00000002) == 0x00000002);
+      }
+      /**
+       * <code>optional .textsecure.SenderKeyStateStructure.SenderChainKey senderChainKey = 2;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey getSenderChainKey() {
+        if (senderChainKeyBuilder_ == null) {
+          return senderChainKey_;
+        } else {
+          return senderChainKeyBuilder_.getMessage();
+        }
+      }
+      /**
+       * <code>optional .textsecure.SenderKeyStateStructure.SenderChainKey senderChainKey = 2;</code>
+       */
+      public Builder setSenderChainKey(org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey value) {
+        if (senderChainKeyBuilder_ == null) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          senderChainKey_ = value;
+          onChanged();
+        } else {
+          senderChainKeyBuilder_.setMessage(value);
+        }
+        bitField0_ |= 0x00000002;
+        return this;
+      }
+      /**
+       * <code>optional .textsecure.SenderKeyStateStructure.SenderChainKey senderChainKey = 2;</code>
+       */
+      public Builder setSenderChainKey(
+          org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey.Builder builderForValue) {
+        if (senderChainKeyBuilder_ == null) {
+          senderChainKey_ = builderForValue.build();
+          onChanged();
+        } else {
+          senderChainKeyBuilder_.setMessage(builderForValue.build());
+        }
+        bitField0_ |= 0x00000002;
+        return this;
+      }
+      /**
+       * <code>optional .textsecure.SenderKeyStateStructure.SenderChainKey senderChainKey = 2;</code>
+       */
+      public Builder mergeSenderChainKey(org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey value) {
+        if (senderChainKeyBuilder_ == null) {
+          if (((bitField0_ & 0x00000002) == 0x00000002) &&
+              senderChainKey_ != org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey.getDefaultInstance()) {
+            senderChainKey_ =
+              org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey.newBuilder(senderChainKey_).mergeFrom(value).buildPartial();
+          } else {
+            senderChainKey_ = value;
+          }
+          onChanged();
+        } else {
+          senderChainKeyBuilder_.mergeFrom(value);
+        }
+        bitField0_ |= 0x00000002;
+        return this;
+      }
+      /**
+       * <code>optional .textsecure.SenderKeyStateStructure.SenderChainKey senderChainKey = 2;</code>
+       */
+      public Builder clearSenderChainKey() {
+        if (senderChainKeyBuilder_ == null) {
+          senderChainKey_ = org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey.getDefaultInstance();
+          onChanged();
+        } else {
+          senderChainKeyBuilder_.clear();
+        }
+        bitField0_ = (bitField0_ & ~0x00000002);
+        return this;
+      }
+      /**
+       * <code>optional .textsecure.SenderKeyStateStructure.SenderChainKey senderChainKey = 2;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey.Builder getSenderChainKeyBuilder() {
+        bitField0_ |= 0x00000002;
+        onChanged();
+        return getSenderChainKeyFieldBuilder().getBuilder();
+      }
+      /**
+       * <code>optional .textsecure.SenderKeyStateStructure.SenderChainKey senderChainKey = 2;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKeyOrBuilder getSenderChainKeyOrBuilder() {
+        if (senderChainKeyBuilder_ != null) {
+          return senderChainKeyBuilder_.getMessageOrBuilder();
+        } else {
+          return senderChainKey_;
+        }
+      }
+      /**
+       * <code>optional .textsecure.SenderKeyStateStructure.SenderChainKey senderChainKey = 2;</code>
+       */
+      private com.google.protobuf.SingleFieldBuilder<
+          org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKeyOrBuilder> 
+          getSenderChainKeyFieldBuilder() {
+        if (senderChainKeyBuilder_ == null) {
+          senderChainKeyBuilder_ = new com.google.protobuf.SingleFieldBuilder<
+              org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKey.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderChainKeyOrBuilder>(
+                  senderChainKey_,
+                  getParentForChildren(),
+                  isClean());
+          senderChainKey_ = null;
+        }
+        return senderChainKeyBuilder_;
+      }
+
+      // optional .textsecure.SenderKeyStateStructure.SenderSigningKey senderSigningKey = 3;
+      private org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKey senderSigningKey_ = org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKey.getDefaultInstance();
+      private com.google.protobuf.SingleFieldBuilder<
+          org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKey, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKey.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKeyOrBuilder> senderSigningKeyBuilder_;
+      /**
+       * <code>optional .textsecure.SenderKeyStateStructure.SenderSigningKey senderSigningKey = 3;</code>
+       */
+      public boolean hasSenderSigningKey() {
+        return ((bitField0_ & 0x00000004) == 0x00000004);
+      }
+      /**
+       * <code>optional .textsecure.SenderKeyStateStructure.SenderSigningKey senderSigningKey = 3;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKey getSenderSigningKey() {
+        if (senderSigningKeyBuilder_ == null) {
+          return senderSigningKey_;
+        } else {
+          return senderSigningKeyBuilder_.getMessage();
+        }
+      }
+      /**
+       * <code>optional .textsecure.SenderKeyStateStructure.SenderSigningKey senderSigningKey = 3;</code>
+       */
+      public Builder setSenderSigningKey(org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKey value) {
+        if (senderSigningKeyBuilder_ == null) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          senderSigningKey_ = value;
+          onChanged();
+        } else {
+          senderSigningKeyBuilder_.setMessage(value);
+        }
+        bitField0_ |= 0x00000004;
+        return this;
+      }
+      /**
+       * <code>optional .textsecure.SenderKeyStateStructure.SenderSigningKey senderSigningKey = 3;</code>
+       */
+      public Builder setSenderSigningKey(
+          org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKey.Builder builderForValue) {
+        if (senderSigningKeyBuilder_ == null) {
+          senderSigningKey_ = builderForValue.build();
+          onChanged();
+        } else {
+          senderSigningKeyBuilder_.setMessage(builderForValue.build());
+        }
+        bitField0_ |= 0x00000004;
+        return this;
+      }
+      /**
+       * <code>optional .textsecure.SenderKeyStateStructure.SenderSigningKey senderSigningKey = 3;</code>
+       */
+      public Builder mergeSenderSigningKey(org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKey value) {
+        if (senderSigningKeyBuilder_ == null) {
+          if (((bitField0_ & 0x00000004) == 0x00000004) &&
+              senderSigningKey_ != org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKey.getDefaultInstance()) {
+            senderSigningKey_ =
+              org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKey.newBuilder(senderSigningKey_).mergeFrom(value).buildPartial();
+          } else {
+            senderSigningKey_ = value;
+          }
+          onChanged();
+        } else {
+          senderSigningKeyBuilder_.mergeFrom(value);
+        }
+        bitField0_ |= 0x00000004;
+        return this;
+      }
+      /**
+       * <code>optional .textsecure.SenderKeyStateStructure.SenderSigningKey senderSigningKey = 3;</code>
+       */
+      public Builder clearSenderSigningKey() {
+        if (senderSigningKeyBuilder_ == null) {
+          senderSigningKey_ = org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKey.getDefaultInstance();
+          onChanged();
+        } else {
+          senderSigningKeyBuilder_.clear();
+        }
+        bitField0_ = (bitField0_ & ~0x00000004);
+        return this;
+      }
+      /**
+       * <code>optional .textsecure.SenderKeyStateStructure.SenderSigningKey senderSigningKey = 3;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKey.Builder getSenderSigningKeyBuilder() {
+        bitField0_ |= 0x00000004;
+        onChanged();
+        return getSenderSigningKeyFieldBuilder().getBuilder();
+      }
+      /**
+       * <code>optional .textsecure.SenderKeyStateStructure.SenderSigningKey senderSigningKey = 3;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKeyOrBuilder getSenderSigningKeyOrBuilder() {
+        if (senderSigningKeyBuilder_ != null) {
+          return senderSigningKeyBuilder_.getMessageOrBuilder();
+        } else {
+          return senderSigningKey_;
+        }
+      }
+      /**
+       * <code>optional .textsecure.SenderKeyStateStructure.SenderSigningKey senderSigningKey = 3;</code>
+       */
+      private com.google.protobuf.SingleFieldBuilder<
+          org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKey, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKey.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKeyOrBuilder> 
+          getSenderSigningKeyFieldBuilder() {
+        if (senderSigningKeyBuilder_ == null) {
+          senderSigningKeyBuilder_ = new com.google.protobuf.SingleFieldBuilder<
+              org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKey, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKey.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderSigningKeyOrBuilder>(
+                  senderSigningKey_,
+                  getParentForChildren(),
+                  isClean());
+          senderSigningKey_ = null;
+        }
+        return senderSigningKeyBuilder_;
+      }
+
+      // repeated .textsecure.SenderKeyStateStructure.SenderMessageKey senderMessageKeys = 4;
+      private java.util.List<org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey> senderMessageKeys_ =
+        java.util.Collections.emptyList();
+      private void ensureSenderMessageKeysIsMutable() {
+        if (!((bitField0_ & 0x00000008) == 0x00000008)) {
+          senderMessageKeys_ = new java.util.ArrayList<org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey>(senderMessageKeys_);
+          bitField0_ |= 0x00000008;
+         }
+      }
+
+      private com.google.protobuf.RepeatedFieldBuilder<
+          org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKeyOrBuilder> senderMessageKeysBuilder_;
+
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure.SenderMessageKey senderMessageKeys = 4;</code>
+       */
+      public java.util.List<org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey> getSenderMessageKeysList() {
+        if (senderMessageKeysBuilder_ == null) {
+          return java.util.Collections.unmodifiableList(senderMessageKeys_);
+        } else {
+          return senderMessageKeysBuilder_.getMessageList();
+        }
+      }
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure.SenderMessageKey senderMessageKeys = 4;</code>
+       */
+      public int getSenderMessageKeysCount() {
+        if (senderMessageKeysBuilder_ == null) {
+          return senderMessageKeys_.size();
+        } else {
+          return senderMessageKeysBuilder_.getCount();
+        }
+      }
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure.SenderMessageKey senderMessageKeys = 4;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey getSenderMessageKeys(int index) {
+        if (senderMessageKeysBuilder_ == null) {
+          return senderMessageKeys_.get(index);
+        } else {
+          return senderMessageKeysBuilder_.getMessage(index);
+        }
+      }
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure.SenderMessageKey senderMessageKeys = 4;</code>
+       */
+      public Builder setSenderMessageKeys(
+          int index, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey value) {
+        if (senderMessageKeysBuilder_ == null) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          ensureSenderMessageKeysIsMutable();
+          senderMessageKeys_.set(index, value);
+          onChanged();
+        } else {
+          senderMessageKeysBuilder_.setMessage(index, value);
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure.SenderMessageKey senderMessageKeys = 4;</code>
+       */
+      public Builder setSenderMessageKeys(
+          int index, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey.Builder builderForValue) {
+        if (senderMessageKeysBuilder_ == null) {
+          ensureSenderMessageKeysIsMutable();
+          senderMessageKeys_.set(index, builderForValue.build());
+          onChanged();
+        } else {
+          senderMessageKeysBuilder_.setMessage(index, builderForValue.build());
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure.SenderMessageKey senderMessageKeys = 4;</code>
+       */
+      public Builder addSenderMessageKeys(org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey value) {
+        if (senderMessageKeysBuilder_ == null) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          ensureSenderMessageKeysIsMutable();
+          senderMessageKeys_.add(value);
+          onChanged();
+        } else {
+          senderMessageKeysBuilder_.addMessage(value);
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure.SenderMessageKey senderMessageKeys = 4;</code>
+       */
+      public Builder addSenderMessageKeys(
+          int index, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey value) {
+        if (senderMessageKeysBuilder_ == null) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          ensureSenderMessageKeysIsMutable();
+          senderMessageKeys_.add(index, value);
+          onChanged();
+        } else {
+          senderMessageKeysBuilder_.addMessage(index, value);
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure.SenderMessageKey senderMessageKeys = 4;</code>
+       */
+      public Builder addSenderMessageKeys(
+          org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey.Builder builderForValue) {
+        if (senderMessageKeysBuilder_ == null) {
+          ensureSenderMessageKeysIsMutable();
+          senderMessageKeys_.add(builderForValue.build());
+          onChanged();
+        } else {
+          senderMessageKeysBuilder_.addMessage(builderForValue.build());
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure.SenderMessageKey senderMessageKeys = 4;</code>
+       */
+      public Builder addSenderMessageKeys(
+          int index, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey.Builder builderForValue) {
+        if (senderMessageKeysBuilder_ == null) {
+          ensureSenderMessageKeysIsMutable();
+          senderMessageKeys_.add(index, builderForValue.build());
+          onChanged();
+        } else {
+          senderMessageKeysBuilder_.addMessage(index, builderForValue.build());
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure.SenderMessageKey senderMessageKeys = 4;</code>
+       */
+      public Builder addAllSenderMessageKeys(
+          java.lang.Iterable<? extends org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey> values) {
+        if (senderMessageKeysBuilder_ == null) {
+          ensureSenderMessageKeysIsMutable();
+          super.addAll(values, senderMessageKeys_);
+          onChanged();
+        } else {
+          senderMessageKeysBuilder_.addAllMessages(values);
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure.SenderMessageKey senderMessageKeys = 4;</code>
+       */
+      public Builder clearSenderMessageKeys() {
+        if (senderMessageKeysBuilder_ == null) {
+          senderMessageKeys_ = java.util.Collections.emptyList();
+          bitField0_ = (bitField0_ & ~0x00000008);
+          onChanged();
+        } else {
+          senderMessageKeysBuilder_.clear();
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure.SenderMessageKey senderMessageKeys = 4;</code>
+       */
+      public Builder removeSenderMessageKeys(int index) {
+        if (senderMessageKeysBuilder_ == null) {
+          ensureSenderMessageKeysIsMutable();
+          senderMessageKeys_.remove(index);
+          onChanged();
+        } else {
+          senderMessageKeysBuilder_.remove(index);
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure.SenderMessageKey senderMessageKeys = 4;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey.Builder getSenderMessageKeysBuilder(
+          int index) {
+        return getSenderMessageKeysFieldBuilder().getBuilder(index);
+      }
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure.SenderMessageKey senderMessageKeys = 4;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKeyOrBuilder getSenderMessageKeysOrBuilder(
+          int index) {
+        if (senderMessageKeysBuilder_ == null) {
+          return senderMessageKeys_.get(index);  } else {
+          return senderMessageKeysBuilder_.getMessageOrBuilder(index);
+        }
+      }
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure.SenderMessageKey senderMessageKeys = 4;</code>
+       */
+      public java.util.List<? extends org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKeyOrBuilder> 
+           getSenderMessageKeysOrBuilderList() {
+        if (senderMessageKeysBuilder_ != null) {
+          return senderMessageKeysBuilder_.getMessageOrBuilderList();
+        } else {
+          return java.util.Collections.unmodifiableList(senderMessageKeys_);
+        }
+      }
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure.SenderMessageKey senderMessageKeys = 4;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey.Builder addSenderMessageKeysBuilder() {
+        return getSenderMessageKeysFieldBuilder().addBuilder(
+            org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey.getDefaultInstance());
+      }
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure.SenderMessageKey senderMessageKeys = 4;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey.Builder addSenderMessageKeysBuilder(
+          int index) {
+        return getSenderMessageKeysFieldBuilder().addBuilder(
+            index, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey.getDefaultInstance());
+      }
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure.SenderMessageKey senderMessageKeys = 4;</code>
+       */
+      public java.util.List<org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey.Builder> 
+           getSenderMessageKeysBuilderList() {
+        return getSenderMessageKeysFieldBuilder().getBuilderList();
+      }
+      private com.google.protobuf.RepeatedFieldBuilder<
+          org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKeyOrBuilder> 
+          getSenderMessageKeysFieldBuilder() {
+        if (senderMessageKeysBuilder_ == null) {
+          senderMessageKeysBuilder_ = new com.google.protobuf.RepeatedFieldBuilder<
+              org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKey.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.SenderMessageKeyOrBuilder>(
+                  senderMessageKeys_,
+                  ((bitField0_ & 0x00000008) == 0x00000008),
+                  getParentForChildren(),
+                  isClean());
+          senderMessageKeys_ = null;
+        }
+        return senderMessageKeysBuilder_;
+      }
+
+      // @@protoc_insertion_point(builder_scope:textsecure.SenderKeyStateStructure)
+    }
+
+    static {
+      defaultInstance = new SenderKeyStateStructure(true);
+      defaultInstance.initFields();
+    }
+
+    // @@protoc_insertion_point(class_scope:textsecure.SenderKeyStateStructure)
+  }
+
+  public interface SenderKeyRecordStructureOrBuilder
+      extends com.google.protobuf.MessageOrBuilder {
+
+    // repeated .textsecure.SenderKeyStateStructure senderKeyStates = 1;
+    /**
+     * <code>repeated .textsecure.SenderKeyStateStructure senderKeyStates = 1;</code>
+     */
+    java.util.List<org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure> 
+        getSenderKeyStatesList();
+    /**
+     * <code>repeated .textsecure.SenderKeyStateStructure senderKeyStates = 1;</code>
+     */
+    org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure getSenderKeyStates(int index);
+    /**
+     * <code>repeated .textsecure.SenderKeyStateStructure senderKeyStates = 1;</code>
+     */
+    int getSenderKeyStatesCount();
+    /**
+     * <code>repeated .textsecure.SenderKeyStateStructure senderKeyStates = 1;</code>
+     */
+    java.util.List<? extends org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructureOrBuilder> 
+        getSenderKeyStatesOrBuilderList();
+    /**
+     * <code>repeated .textsecure.SenderKeyStateStructure senderKeyStates = 1;</code>
+     */
+    org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructureOrBuilder getSenderKeyStatesOrBuilder(
+        int index);
+  }
+  /**
+   * Protobuf type {@code textsecure.SenderKeyRecordStructure}
+   */
+  public static final class SenderKeyRecordStructure extends
+      com.google.protobuf.GeneratedMessage
+      implements SenderKeyRecordStructureOrBuilder {
+    // Use SenderKeyRecordStructure.newBuilder() to construct.
+    private SenderKeyRecordStructure(com.google.protobuf.GeneratedMessage.Builder<?> builder) {
+      super(builder);
+      this.unknownFields = builder.getUnknownFields();
+    }
+    private SenderKeyRecordStructure(boolean noInit) { this.unknownFields = com.google.protobuf.UnknownFieldSet.getDefaultInstance(); }
+
+    private static final SenderKeyRecordStructure defaultInstance;
+    public static SenderKeyRecordStructure getDefaultInstance() {
+      return defaultInstance;
+    }
+
+    public SenderKeyRecordStructure getDefaultInstanceForType() {
+      return defaultInstance;
+    }
+
+    private final com.google.protobuf.UnknownFieldSet unknownFields;
+    @java.lang.Override
+    public final com.google.protobuf.UnknownFieldSet
+        getUnknownFields() {
+      return this.unknownFields;
+    }
+    private SenderKeyRecordStructure(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      initFields();
+      int mutable_bitField0_ = 0;
+      com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+          com.google.protobuf.UnknownFieldSet.newBuilder();
+      try {
+        boolean done = false;
+        while (!done) {
+          int tag = input.readTag();
+          switch (tag) {
+            case 0:
+              done = true;
+              break;
+            default: {
+              if (!parseUnknownField(input, unknownFields,
+                                     extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+            case 10: {
+              if (!((mutable_bitField0_ & 0x00000001) == 0x00000001)) {
+                senderKeyStates_ = new java.util.ArrayList<org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure>();
+                mutable_bitField0_ |= 0x00000001;
+              }
+              senderKeyStates_.add(input.readMessage(org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.PARSER, extensionRegistry));
+              break;
+            }
+          }
+        }
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        throw e.setUnfinishedMessage(this);
+      } catch (java.io.IOException e) {
+        throw new com.google.protobuf.InvalidProtocolBufferException(
+            e.getMessage()).setUnfinishedMessage(this);
+      } finally {
+        if (((mutable_bitField0_ & 0x00000001) == 0x00000001)) {
+          senderKeyStates_ = java.util.Collections.unmodifiableList(senderKeyStates_);
+        }
+        this.unknownFields = unknownFields.build();
+        makeExtensionsImmutable();
+      }
+    }
+    public static final com.google.protobuf.Descriptors.Descriptor
+        getDescriptor() {
+      return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SenderKeyRecordStructure_descriptor;
+    }
+
+    protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SenderKeyRecordStructure_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyRecordStructure.class, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyRecordStructure.Builder.class);
+    }
+
+    public static com.google.protobuf.Parser<SenderKeyRecordStructure> PARSER =
+        new com.google.protobuf.AbstractParser<SenderKeyRecordStructure>() {
+      public SenderKeyRecordStructure parsePartialFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return new SenderKeyRecordStructure(input, extensionRegistry);
+      }
+    };
+
+    @java.lang.Override
+    public com.google.protobuf.Parser<SenderKeyRecordStructure> getParserForType() {
+      return PARSER;
+    }
+
+    // repeated .textsecure.SenderKeyStateStructure senderKeyStates = 1;
+    public static final int SENDERKEYSTATES_FIELD_NUMBER = 1;
+    private java.util.List<org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure> senderKeyStates_;
+    /**
+     * <code>repeated .textsecure.SenderKeyStateStructure senderKeyStates = 1;</code>
+     */
+    public java.util.List<org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure> getSenderKeyStatesList() {
+      return senderKeyStates_;
+    }
+    /**
+     * <code>repeated .textsecure.SenderKeyStateStructure senderKeyStates = 1;</code>
+     */
+    public java.util.List<? extends org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructureOrBuilder> 
+        getSenderKeyStatesOrBuilderList() {
+      return senderKeyStates_;
+    }
+    /**
+     * <code>repeated .textsecure.SenderKeyStateStructure senderKeyStates = 1;</code>
+     */
+    public int getSenderKeyStatesCount() {
+      return senderKeyStates_.size();
+    }
+    /**
+     * <code>repeated .textsecure.SenderKeyStateStructure senderKeyStates = 1;</code>
+     */
+    public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure getSenderKeyStates(int index) {
+      return senderKeyStates_.get(index);
+    }
+    /**
+     * <code>repeated .textsecure.SenderKeyStateStructure senderKeyStates = 1;</code>
+     */
+    public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructureOrBuilder getSenderKeyStatesOrBuilder(
+        int index) {
+      return senderKeyStates_.get(index);
+    }
+
+    private void initFields() {
+      senderKeyStates_ = java.util.Collections.emptyList();
+    }
+    private byte memoizedIsInitialized = -1;
+    public final boolean isInitialized() {
+      byte isInitialized = memoizedIsInitialized;
+      if (isInitialized != -1) return isInitialized == 1;
+
+      memoizedIsInitialized = 1;
+      return true;
+    }
+
+    public void writeTo(com.google.protobuf.CodedOutputStream output)
+                        throws java.io.IOException {
+      getSerializedSize();
+      for (int i = 0; i < senderKeyStates_.size(); i++) {
+        output.writeMessage(1, senderKeyStates_.get(i));
+      }
+      getUnknownFields().writeTo(output);
+    }
+
+    private int memoizedSerializedSize = -1;
+    public int getSerializedSize() {
+      int size = memoizedSerializedSize;
+      if (size != -1) return size;
+
+      size = 0;
+      for (int i = 0; i < senderKeyStates_.size(); i++) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeMessageSize(1, senderKeyStates_.get(i));
+      }
+      size += getUnknownFields().getSerializedSize();
+      memoizedSerializedSize = size;
+      return size;
+    }
+
+    private static final long serialVersionUID = 0L;
+    @java.lang.Override
+    protected java.lang.Object writeReplace()
+        throws java.io.ObjectStreamException {
+      return super.writeReplace();
+    }
+
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyRecordStructure parseFrom(
+        com.google.protobuf.ByteString data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyRecordStructure parseFrom(
+        com.google.protobuf.ByteString data,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data, extensionRegistry);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyRecordStructure parseFrom(byte[] data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyRecordStructure parseFrom(
+        byte[] data,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data, extensionRegistry);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyRecordStructure parseFrom(java.io.InputStream input)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyRecordStructure parseFrom(
+        java.io.InputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input, extensionRegistry);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyRecordStructure parseDelimitedFrom(java.io.InputStream input)
+        throws java.io.IOException {
+      return PARSER.parseDelimitedFrom(input);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyRecordStructure parseDelimitedFrom(
+        java.io.InputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return PARSER.parseDelimitedFrom(input, extensionRegistry);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyRecordStructure parseFrom(
+        com.google.protobuf.CodedInputStream input)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input);
+    }
+    public static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyRecordStructure parseFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input, extensionRegistry);
+    }
+
+    public static Builder newBuilder() { return Builder.create(); }
+    public Builder newBuilderForType() { return newBuilder(); }
+    public static Builder newBuilder(org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyRecordStructure prototype) {
+      return newBuilder().mergeFrom(prototype);
+    }
+    public Builder toBuilder() { return newBuilder(this); }
+
+    @java.lang.Override
+    protected Builder newBuilderForType(
+        com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+      Builder builder = new Builder(parent);
+      return builder;
+    }
+    /**
+     * Protobuf type {@code textsecure.SenderKeyRecordStructure}
+     */
+    public static final class Builder extends
+        com.google.protobuf.GeneratedMessage.Builder<Builder>
+       implements org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyRecordStructureOrBuilder {
+      public static final com.google.protobuf.Descriptors.Descriptor
+          getDescriptor() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SenderKeyRecordStructure_descriptor;
+      }
+
+      protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+          internalGetFieldAccessorTable() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SenderKeyRecordStructure_fieldAccessorTable
+            .ensureFieldAccessorsInitialized(
+                org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyRecordStructure.class, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyRecordStructure.Builder.class);
+      }
+
+      // Construct using org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyRecordStructure.newBuilder()
+      private Builder() {
+        maybeForceBuilderInitialization();
+      }
+
+      private Builder(
+          com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+        super(parent);
+        maybeForceBuilderInitialization();
+      }
+      private void maybeForceBuilderInitialization() {
+        if (com.google.protobuf.GeneratedMessage.alwaysUseFieldBuilders) {
+          getSenderKeyStatesFieldBuilder();
+        }
+      }
+      private static Builder create() {
+        return new Builder();
+      }
+
+      public Builder clear() {
+        super.clear();
+        if (senderKeyStatesBuilder_ == null) {
+          senderKeyStates_ = java.util.Collections.emptyList();
+          bitField0_ = (bitField0_ & ~0x00000001);
+        } else {
+          senderKeyStatesBuilder_.clear();
+        }
+        return this;
+      }
+
+      public Builder clone() {
+        return create().mergeFrom(buildPartial());
+      }
+
+      public com.google.protobuf.Descriptors.Descriptor
+          getDescriptorForType() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.internal_static_textsecure_SenderKeyRecordStructure_descriptor;
+      }
+
+      public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyRecordStructure getDefaultInstanceForType() {
+        return org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyRecordStructure.getDefaultInstance();
+      }
+
+      public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyRecordStructure build() {
+        org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyRecordStructure result = buildPartial();
+        if (!result.isInitialized()) {
+          throw newUninitializedMessageException(result);
+        }
+        return result;
+      }
+
+      public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyRecordStructure buildPartial() {
+        org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyRecordStructure result = new org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyRecordStructure(this);
+        int from_bitField0_ = bitField0_;
+        if (senderKeyStatesBuilder_ == null) {
+          if (((bitField0_ & 0x00000001) == 0x00000001)) {
+            senderKeyStates_ = java.util.Collections.unmodifiableList(senderKeyStates_);
+            bitField0_ = (bitField0_ & ~0x00000001);
+          }
+          result.senderKeyStates_ = senderKeyStates_;
+        } else {
+          result.senderKeyStates_ = senderKeyStatesBuilder_.build();
+        }
+        onBuilt();
+        return result;
+      }
+
+      public Builder mergeFrom(com.google.protobuf.Message other) {
+        if (other instanceof org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyRecordStructure) {
+          return mergeFrom((org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyRecordStructure)other);
+        } else {
+          super.mergeFrom(other);
+          return this;
+        }
+      }
+
+      public Builder mergeFrom(org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyRecordStructure other) {
+        if (other == org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyRecordStructure.getDefaultInstance()) return this;
+        if (senderKeyStatesBuilder_ == null) {
+          if (!other.senderKeyStates_.isEmpty()) {
+            if (senderKeyStates_.isEmpty()) {
+              senderKeyStates_ = other.senderKeyStates_;
+              bitField0_ = (bitField0_ & ~0x00000001);
+            } else {
+              ensureSenderKeyStatesIsMutable();
+              senderKeyStates_.addAll(other.senderKeyStates_);
+            }
+            onChanged();
+          }
+        } else {
+          if (!other.senderKeyStates_.isEmpty()) {
+            if (senderKeyStatesBuilder_.isEmpty()) {
+              senderKeyStatesBuilder_.dispose();
+              senderKeyStatesBuilder_ = null;
+              senderKeyStates_ = other.senderKeyStates_;
+              bitField0_ = (bitField0_ & ~0x00000001);
+              senderKeyStatesBuilder_ = 
+                com.google.protobuf.GeneratedMessage.alwaysUseFieldBuilders ?
+                   getSenderKeyStatesFieldBuilder() : null;
+            } else {
+              senderKeyStatesBuilder_.addAllMessages(other.senderKeyStates_);
+            }
+          }
+        }
+        this.mergeUnknownFields(other.getUnknownFields());
+        return this;
+      }
+
+      public final boolean isInitialized() {
+        return true;
+      }
+
+      public Builder mergeFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyRecordStructure parsedMessage = null;
+        try {
+          parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+        } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+          parsedMessage = (org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyRecordStructure) e.getUnfinishedMessage();
+          throw e;
+        } finally {
+          if (parsedMessage != null) {
+            mergeFrom(parsedMessage);
+          }
+        }
+        return this;
+      }
+      private int bitField0_;
+
+      // repeated .textsecure.SenderKeyStateStructure senderKeyStates = 1;
+      private java.util.List<org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure> senderKeyStates_ =
+        java.util.Collections.emptyList();
+      private void ensureSenderKeyStatesIsMutable() {
+        if (!((bitField0_ & 0x00000001) == 0x00000001)) {
+          senderKeyStates_ = new java.util.ArrayList<org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure>(senderKeyStates_);
+          bitField0_ |= 0x00000001;
+         }
+      }
+
+      private com.google.protobuf.RepeatedFieldBuilder<
+          org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructureOrBuilder> senderKeyStatesBuilder_;
+
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure senderKeyStates = 1;</code>
+       */
+      public java.util.List<org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure> getSenderKeyStatesList() {
+        if (senderKeyStatesBuilder_ == null) {
+          return java.util.Collections.unmodifiableList(senderKeyStates_);
+        } else {
+          return senderKeyStatesBuilder_.getMessageList();
+        }
+      }
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure senderKeyStates = 1;</code>
+       */
+      public int getSenderKeyStatesCount() {
+        if (senderKeyStatesBuilder_ == null) {
+          return senderKeyStates_.size();
+        } else {
+          return senderKeyStatesBuilder_.getCount();
+        }
+      }
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure senderKeyStates = 1;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure getSenderKeyStates(int index) {
+        if (senderKeyStatesBuilder_ == null) {
+          return senderKeyStates_.get(index);
+        } else {
+          return senderKeyStatesBuilder_.getMessage(index);
+        }
+      }
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure senderKeyStates = 1;</code>
+       */
+      public Builder setSenderKeyStates(
+          int index, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure value) {
+        if (senderKeyStatesBuilder_ == null) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          ensureSenderKeyStatesIsMutable();
+          senderKeyStates_.set(index, value);
+          onChanged();
+        } else {
+          senderKeyStatesBuilder_.setMessage(index, value);
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure senderKeyStates = 1;</code>
+       */
+      public Builder setSenderKeyStates(
+          int index, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.Builder builderForValue) {
+        if (senderKeyStatesBuilder_ == null) {
+          ensureSenderKeyStatesIsMutable();
+          senderKeyStates_.set(index, builderForValue.build());
+          onChanged();
+        } else {
+          senderKeyStatesBuilder_.setMessage(index, builderForValue.build());
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure senderKeyStates = 1;</code>
+       */
+      public Builder addSenderKeyStates(org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure value) {
+        if (senderKeyStatesBuilder_ == null) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          ensureSenderKeyStatesIsMutable();
+          senderKeyStates_.add(value);
+          onChanged();
+        } else {
+          senderKeyStatesBuilder_.addMessage(value);
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure senderKeyStates = 1;</code>
+       */
+      public Builder addSenderKeyStates(
+          int index, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure value) {
+        if (senderKeyStatesBuilder_ == null) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          ensureSenderKeyStatesIsMutable();
+          senderKeyStates_.add(index, value);
+          onChanged();
+        } else {
+          senderKeyStatesBuilder_.addMessage(index, value);
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure senderKeyStates = 1;</code>
+       */
+      public Builder addSenderKeyStates(
+          org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.Builder builderForValue) {
+        if (senderKeyStatesBuilder_ == null) {
+          ensureSenderKeyStatesIsMutable();
+          senderKeyStates_.add(builderForValue.build());
+          onChanged();
+        } else {
+          senderKeyStatesBuilder_.addMessage(builderForValue.build());
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure senderKeyStates = 1;</code>
+       */
+      public Builder addSenderKeyStates(
+          int index, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.Builder builderForValue) {
+        if (senderKeyStatesBuilder_ == null) {
+          ensureSenderKeyStatesIsMutable();
+          senderKeyStates_.add(index, builderForValue.build());
+          onChanged();
+        } else {
+          senderKeyStatesBuilder_.addMessage(index, builderForValue.build());
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure senderKeyStates = 1;</code>
+       */
+      public Builder addAllSenderKeyStates(
+          java.lang.Iterable<? extends org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure> values) {
+        if (senderKeyStatesBuilder_ == null) {
+          ensureSenderKeyStatesIsMutable();
+          super.addAll(values, senderKeyStates_);
+          onChanged();
+        } else {
+          senderKeyStatesBuilder_.addAllMessages(values);
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure senderKeyStates = 1;</code>
+       */
+      public Builder clearSenderKeyStates() {
+        if (senderKeyStatesBuilder_ == null) {
+          senderKeyStates_ = java.util.Collections.emptyList();
+          bitField0_ = (bitField0_ & ~0x00000001);
+          onChanged();
+        } else {
+          senderKeyStatesBuilder_.clear();
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure senderKeyStates = 1;</code>
+       */
+      public Builder removeSenderKeyStates(int index) {
+        if (senderKeyStatesBuilder_ == null) {
+          ensureSenderKeyStatesIsMutable();
+          senderKeyStates_.remove(index);
+          onChanged();
+        } else {
+          senderKeyStatesBuilder_.remove(index);
+        }
+        return this;
+      }
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure senderKeyStates = 1;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.Builder getSenderKeyStatesBuilder(
+          int index) {
+        return getSenderKeyStatesFieldBuilder().getBuilder(index);
+      }
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure senderKeyStates = 1;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructureOrBuilder getSenderKeyStatesOrBuilder(
+          int index) {
+        if (senderKeyStatesBuilder_ == null) {
+          return senderKeyStates_.get(index);  } else {
+          return senderKeyStatesBuilder_.getMessageOrBuilder(index);
+        }
+      }
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure senderKeyStates = 1;</code>
+       */
+      public java.util.List<? extends org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructureOrBuilder> 
+           getSenderKeyStatesOrBuilderList() {
+        if (senderKeyStatesBuilder_ != null) {
+          return senderKeyStatesBuilder_.getMessageOrBuilderList();
+        } else {
+          return java.util.Collections.unmodifiableList(senderKeyStates_);
+        }
+      }
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure senderKeyStates = 1;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.Builder addSenderKeyStatesBuilder() {
+        return getSenderKeyStatesFieldBuilder().addBuilder(
+            org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.getDefaultInstance());
+      }
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure senderKeyStates = 1;</code>
+       */
+      public org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.Builder addSenderKeyStatesBuilder(
+          int index) {
+        return getSenderKeyStatesFieldBuilder().addBuilder(
+            index, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.getDefaultInstance());
+      }
+      /**
+       * <code>repeated .textsecure.SenderKeyStateStructure senderKeyStates = 1;</code>
+       */
+      public java.util.List<org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.Builder> 
+           getSenderKeyStatesBuilderList() {
+        return getSenderKeyStatesFieldBuilder().getBuilderList();
+      }
+      private com.google.protobuf.RepeatedFieldBuilder<
+          org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructureOrBuilder> 
+          getSenderKeyStatesFieldBuilder() {
+        if (senderKeyStatesBuilder_ == null) {
+          senderKeyStatesBuilder_ = new com.google.protobuf.RepeatedFieldBuilder<
+              org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructure.Builder, org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyStateStructureOrBuilder>(
+                  senderKeyStates_,
+                  ((bitField0_ & 0x00000001) == 0x00000001),
+                  getParentForChildren(),
+                  isClean());
+          senderKeyStates_ = null;
+        }
+        return senderKeyStatesBuilder_;
+      }
+
+      // @@protoc_insertion_point(builder_scope:textsecure.SenderKeyRecordStructure)
+    }
+
+    static {
+      defaultInstance = new SenderKeyRecordStructure(true);
+      defaultInstance.initFields();
+    }
+
+    // @@protoc_insertion_point(class_scope:textsecure.SenderKeyRecordStructure)
+  }
+
+  private static com.google.protobuf.Descriptors.Descriptor
+    internal_static_textsecure_SessionStructure_descriptor;
+  private static
+    com.google.protobuf.GeneratedMessage.FieldAccessorTable
+      internal_static_textsecure_SessionStructure_fieldAccessorTable;
+  private static com.google.protobuf.Descriptors.Descriptor
+    internal_static_textsecure_SessionStructure_Chain_descriptor;
+  private static
+    com.google.protobuf.GeneratedMessage.FieldAccessorTable
+      internal_static_textsecure_SessionStructure_Chain_fieldAccessorTable;
+  private static com.google.protobuf.Descriptors.Descriptor
+    internal_static_textsecure_SessionStructure_Chain_ChainKey_descriptor;
+  private static
+    com.google.protobuf.GeneratedMessage.FieldAccessorTable
+      internal_static_textsecure_SessionStructure_Chain_ChainKey_fieldAccessorTable;
+  private static com.google.protobuf.Descriptors.Descriptor
+    internal_static_textsecure_SessionStructure_Chain_MessageKey_descriptor;
+  private static
+    com.google.protobuf.GeneratedMessage.FieldAccessorTable
+      internal_static_textsecure_SessionStructure_Chain_MessageKey_fieldAccessorTable;
+  private static com.google.protobuf.Descriptors.Descriptor
+    internal_static_textsecure_SessionStructure_PendingKeyExchange_descriptor;
+  private static
+    com.google.protobuf.GeneratedMessage.FieldAccessorTable
+      internal_static_textsecure_SessionStructure_PendingKeyExchange_fieldAccessorTable;
+  private static com.google.protobuf.Descriptors.Descriptor
+    internal_static_textsecure_SessionStructure_PendingPreKey_descriptor;
+  private static
+    com.google.protobuf.GeneratedMessage.FieldAccessorTable
+      internal_static_textsecure_SessionStructure_PendingPreKey_fieldAccessorTable;
+  private static com.google.protobuf.Descriptors.Descriptor
+    internal_static_textsecure_RecordStructure_descriptor;
+  private static
+    com.google.protobuf.GeneratedMessage.FieldAccessorTable
+      internal_static_textsecure_RecordStructure_fieldAccessorTable;
+  private static com.google.protobuf.Descriptors.Descriptor
+    internal_static_textsecure_PreKeyRecordStructure_descriptor;
+  private static
+    com.google.protobuf.GeneratedMessage.FieldAccessorTable
+      internal_static_textsecure_PreKeyRecordStructure_fieldAccessorTable;
+  private static com.google.protobuf.Descriptors.Descriptor
+    internal_static_textsecure_SignedPreKeyRecordStructure_descriptor;
+  private static
+    com.google.protobuf.GeneratedMessage.FieldAccessorTable
+      internal_static_textsecure_SignedPreKeyRecordStructure_fieldAccessorTable;
+  private static com.google.protobuf.Descriptors.Descriptor
+    internal_static_textsecure_IdentityKeyPairStructure_descriptor;
+  private static
+    com.google.protobuf.GeneratedMessage.FieldAccessorTable
+      internal_static_textsecure_IdentityKeyPairStructure_fieldAccessorTable;
+  private static com.google.protobuf.Descriptors.Descriptor
+    internal_static_textsecure_SenderKeyStateStructure_descriptor;
+  private static
+    com.google.protobuf.GeneratedMessage.FieldAccessorTable
+      internal_static_textsecure_SenderKeyStateStructure_fieldAccessorTable;
+  private static com.google.protobuf.Descriptors.Descriptor
+    internal_static_textsecure_SenderKeyStateStructure_SenderChainKey_descriptor;
+  private static
+    com.google.protobuf.GeneratedMessage.FieldAccessorTable
+      internal_static_textsecure_SenderKeyStateStructure_SenderChainKey_fieldAccessorTable;
+  private static com.google.protobuf.Descriptors.Descriptor
+    internal_static_textsecure_SenderKeyStateStructure_SenderMessageKey_descriptor;
+  private static
+    com.google.protobuf.GeneratedMessage.FieldAccessorTable
+      internal_static_textsecure_SenderKeyStateStructure_SenderMessageKey_fieldAccessorTable;
+  private static com.google.protobuf.Descriptors.Descriptor
+    internal_static_textsecure_SenderKeyStateStructure_SenderSigningKey_descriptor;
+  private static
+    com.google.protobuf.GeneratedMessage.FieldAccessorTable
+      internal_static_textsecure_SenderKeyStateStructure_SenderSigningKey_fieldAccessorTable;
+  private static com.google.protobuf.Descriptors.Descriptor
+    internal_static_textsecure_SenderKeyRecordStructure_descriptor;
+  private static
+    com.google.protobuf.GeneratedMessage.FieldAccessorTable
+      internal_static_textsecure_SenderKeyRecordStructure_fieldAccessorTable;
+
+  public static com.google.protobuf.Descriptors.FileDescriptor
+      getDescriptor() {
+    return descriptor;
+  }
+  private static com.google.protobuf.Descriptors.FileDescriptor
+      descriptor;
+  static {
+    java.lang.String[] descriptorData = {
+      "\n\032LocalStorageProtocol.proto\022\ntextsecure" +
+      "\"\323\010\n\020SessionStructure\022\026\n\016sessionVersion\030" +
+      "\001 \001(\r\022\033\n\023localIdentityPublic\030\002 \001(\014\022\034\n\024re" +
+      "moteIdentityPublic\030\003 \001(\014\022\017\n\007rootKey\030\004 \001(" +
+      "\014\022\027\n\017previousCounter\030\005 \001(\r\0227\n\013senderChai" +
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+      "rg.whispersystems.libaxolotl.stateB\rStor" +
+      "ageProtos"
+    };
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+          internal_static_textsecure_SessionStructure_fieldAccessorTable = new
+            com.google.protobuf.GeneratedMessage.FieldAccessorTable(
+              internal_static_textsecure_SessionStructure_descriptor,
+              new java.lang.String[] { "SessionVersion", "LocalIdentityPublic", "RemoteIdentityPublic", "RootKey", "PreviousCounter", "SenderChain", "ReceiverChains", "PendingKeyExchange", "PendingPreKey", "RemoteRegistrationId", "LocalRegistrationId", "NeedsRefresh", "AliceBaseKey", });
+          internal_static_textsecure_SessionStructure_Chain_descriptor =
+            internal_static_textsecure_SessionStructure_descriptor.getNestedTypes().get(0);
+          internal_static_textsecure_SessionStructure_Chain_fieldAccessorTable = new
+            com.google.protobuf.GeneratedMessage.FieldAccessorTable(
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+              new java.lang.String[] { "SenderRatchetKey", "SenderRatchetKeyPrivate", "ChainKey", "MessageKeys", });
+          internal_static_textsecure_SessionStructure_Chain_ChainKey_descriptor =
+            internal_static_textsecure_SessionStructure_Chain_descriptor.getNestedTypes().get(0);
+          internal_static_textsecure_SessionStructure_Chain_ChainKey_fieldAccessorTable = new
+            com.google.protobuf.GeneratedMessage.FieldAccessorTable(
+              internal_static_textsecure_SessionStructure_Chain_ChainKey_descriptor,
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+          internal_static_textsecure_SessionStructure_Chain_MessageKey_descriptor =
+            internal_static_textsecure_SessionStructure_Chain_descriptor.getNestedTypes().get(1);
+          internal_static_textsecure_SessionStructure_Chain_MessageKey_fieldAccessorTable = new
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+          internal_static_textsecure_SessionStructure_PendingKeyExchange_descriptor =
+            internal_static_textsecure_SessionStructure_descriptor.getNestedTypes().get(1);
+          internal_static_textsecure_SessionStructure_PendingKeyExchange_fieldAccessorTable = new
+            com.google.protobuf.GeneratedMessage.FieldAccessorTable(
+              internal_static_textsecure_SessionStructure_PendingKeyExchange_descriptor,
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+          internal_static_textsecure_SessionStructure_PendingPreKey_descriptor =
+            internal_static_textsecure_SessionStructure_descriptor.getNestedTypes().get(2);
+          internal_static_textsecure_SessionStructure_PendingPreKey_fieldAccessorTable = new
+            com.google.protobuf.GeneratedMessage.FieldAccessorTable(
+              internal_static_textsecure_SessionStructure_PendingPreKey_descriptor,
+              new java.lang.String[] { "PreKeyId", "SignedPreKeyId", "BaseKey", });
+          internal_static_textsecure_RecordStructure_descriptor =
+            getDescriptor().getMessageTypes().get(1);
+          internal_static_textsecure_RecordStructure_fieldAccessorTable = new
+            com.google.protobuf.GeneratedMessage.FieldAccessorTable(
+              internal_static_textsecure_RecordStructure_descriptor,
+              new java.lang.String[] { "CurrentSession", "PreviousSessions", });
+          internal_static_textsecure_PreKeyRecordStructure_descriptor =
+            getDescriptor().getMessageTypes().get(2);
+          internal_static_textsecure_PreKeyRecordStructure_fieldAccessorTable = new
+            com.google.protobuf.GeneratedMessage.FieldAccessorTable(
+              internal_static_textsecure_PreKeyRecordStructure_descriptor,
+              new java.lang.String[] { "Id", "PublicKey", "PrivateKey", });
+          internal_static_textsecure_SignedPreKeyRecordStructure_descriptor =
+            getDescriptor().getMessageTypes().get(3);
+          internal_static_textsecure_SignedPreKeyRecordStructure_fieldAccessorTable = new
+            com.google.protobuf.GeneratedMessage.FieldAccessorTable(
+              internal_static_textsecure_SignedPreKeyRecordStructure_descriptor,
+              new java.lang.String[] { "Id", "PublicKey", "PrivateKey", "Signature", "Timestamp", });
+          internal_static_textsecure_IdentityKeyPairStructure_descriptor =
+            getDescriptor().getMessageTypes().get(4);
+          internal_static_textsecure_IdentityKeyPairStructure_fieldAccessorTable = new
+            com.google.protobuf.GeneratedMessage.FieldAccessorTable(
+              internal_static_textsecure_IdentityKeyPairStructure_descriptor,
+              new java.lang.String[] { "PublicKey", "PrivateKey", });
+          internal_static_textsecure_SenderKeyStateStructure_descriptor =
+            getDescriptor().getMessageTypes().get(5);
+          internal_static_textsecure_SenderKeyStateStructure_fieldAccessorTable = new
+            com.google.protobuf.GeneratedMessage.FieldAccessorTable(
+              internal_static_textsecure_SenderKeyStateStructure_descriptor,
+              new java.lang.String[] { "SenderKeyId", "SenderChainKey", "SenderSigningKey", "SenderMessageKeys", });
+          internal_static_textsecure_SenderKeyStateStructure_SenderChainKey_descriptor =
+            internal_static_textsecure_SenderKeyStateStructure_descriptor.getNestedTypes().get(0);
+          internal_static_textsecure_SenderKeyStateStructure_SenderChainKey_fieldAccessorTable = new
+            com.google.protobuf.GeneratedMessage.FieldAccessorTable(
+              internal_static_textsecure_SenderKeyStateStructure_SenderChainKey_descriptor,
+              new java.lang.String[] { "Iteration", "Seed", });
+          internal_static_textsecure_SenderKeyStateStructure_SenderMessageKey_descriptor =
+            internal_static_textsecure_SenderKeyStateStructure_descriptor.getNestedTypes().get(1);
+          internal_static_textsecure_SenderKeyStateStructure_SenderMessageKey_fieldAccessorTable = new
+            com.google.protobuf.GeneratedMessage.FieldAccessorTable(
+              internal_static_textsecure_SenderKeyStateStructure_SenderMessageKey_descriptor,
+              new java.lang.String[] { "Iteration", "Seed", });
+          internal_static_textsecure_SenderKeyStateStructure_SenderSigningKey_descriptor =
+            internal_static_textsecure_SenderKeyStateStructure_descriptor.getNestedTypes().get(2);
+          internal_static_textsecure_SenderKeyStateStructure_SenderSigningKey_fieldAccessorTable = new
+            com.google.protobuf.GeneratedMessage.FieldAccessorTable(
+              internal_static_textsecure_SenderKeyStateStructure_SenderSigningKey_descriptor,
+              new java.lang.String[] { "Public", "Private", });
+          internal_static_textsecure_SenderKeyRecordStructure_descriptor =
+            getDescriptor().getMessageTypes().get(6);
+          internal_static_textsecure_SenderKeyRecordStructure_fieldAccessorTable = new
+            com.google.protobuf.GeneratedMessage.FieldAccessorTable(
+              internal_static_textsecure_SenderKeyRecordStructure_descriptor,
+              new java.lang.String[] { "SenderKeyStates", });
+          return null;
+        }
+      };
+    com.google.protobuf.Descriptors.FileDescriptor
+      .internalBuildGeneratedFileFrom(descriptorData,
+        new com.google.protobuf.Descriptors.FileDescriptor[] {
+        }, assigner);
+  }
+
+  // @@protoc_insertion_point(outer_class_scope)
+}