Bump version numbers for 1.1.2 release.

Create Screenshot of Conversation for Manual

Closes #1377

See merge request briar/briar!910

bramble-android/build.gradle

@@ -9,8 +9,8 @@ android {
 	defaultConfig {
 		minSdkVersion 14
 		targetSdkVersion 26
-		versionCode 10101
-		versionName "1.1.1"
+		versionCode 10102
+		versionName "1.1.2"
 		consumerProguardFiles 'proguard-rules.txt'
 
 		testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

bramble-api/src/main/java/org/briarproject/bramble/api/Nameable.java

@@ -0,0 +1,10 @@
+package org.briarproject.bramble.api;
+
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+
+@NotNullByDefault
+public interface Nameable {
+
+	String getName();
+
+}

bramble-api/src/main/java/org/briarproject/bramble/api/UnsupportedVersionException.java

@@ -1,9 +0,0 @@
-package org.briarproject.bramble.api;
-
-import java.io.IOException;
-
-/**
- * An exception that indicates an unrecoverable version mismatch.
- */
-public class UnsupportedVersionException extends IOException {
-}

bramble-api/src/main/java/org/briarproject/bramble/api/client/BdfMessageValidator.java

@@ -16,7 +16,6 @@ import java.util.logging.Logger;
 
 import javax.annotation.concurrent.Immutable;
 
-import static org.briarproject.bramble.api.sync.SyncConstants.MESSAGE_HEADER_LENGTH;
 import static org.briarproject.bramble.api.transport.TransportConstants.MAX_CLOCK_DIFFERENCE;
 
 @Immutable
@@ -49,14 +48,13 @@ public abstract class BdfMessageValidator implements MessageValidator {
 			throw new InvalidMessageException(
 					"Timestamp is too far in the future");
 		}
-		byte[] raw = m.getRaw();
-		if (raw.length <= MESSAGE_HEADER_LENGTH) {
+		byte[] body = m.getBody();
+		if (body.length == 0) {
 			throw new InvalidMessageException("Message is too short");
 		}
 		try {
-			BdfList body = clientHelper.toList(raw, MESSAGE_HEADER_LENGTH,
-					raw.length - MESSAGE_HEADER_LENGTH);
-			BdfMessageContext result = validateMessage(m, g, body);
+			BdfList bodyList = clientHelper.toList(body);
+			BdfMessageContext result = validateMessage(m, g, bodyList);
 			Metadata meta = metadataEncoder.encode(result.getDictionary());
 			return new MessageContext(meta, result.getDependencies());
 		} catch (FormatException e) {

bramble-api/src/main/java/org/briarproject/bramble/api/identity/Author.java

@@ -1,5 +1,6 @@
 package org.briarproject.bramble.api.identity;
 
+import org.briarproject.bramble.api.Nameable;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.util.StringUtils;
 
@@ -13,7 +14,7 @@ import static org.briarproject.bramble.api.identity.AuthorConstants.MAX_PUBLIC_K
  */
 @Immutable
 @NotNullByDefault
-public class Author {
+public class Author implements Nameable {
 
 	public enum Status {
 		NONE, ANONYMOUS, UNKNOWN, UNVERIFIED, VERIFIED, OURSELVES

bramble-api/src/main/java/org/briarproject/bramble/api/keyagreement/KeyAgreementConstants.java

@@ -3,7 +3,13 @@ package org.briarproject.bramble.api.keyagreement;
 public interface KeyAgreementConstants {
 
 	/**
-	 * The current version of the BQP protocol. Version number 89 is reserved.
+	 * The version of the BQP protocol used in beta releases. This version
+	 * number is reserved.
+	 */
+	byte BETA_PROTOCOL_VERSION = 89;
+
+	/**
+	 * The current version of the BQP protocol.
 	 */
 	byte PROTOCOL_VERSION = 4;
 

bramble-api/src/main/java/org/briarproject/bramble/api/keyagreement/UnsupportedVersionException.java

@@ -0,0 +1,20 @@
+package org.briarproject.bramble.api.keyagreement;
+
+import java.io.IOException;
+
+/**
+ * Thrown when a QR code that has been scanned uses a protocol version that is
+ * not supported.
+ */
+public class UnsupportedVersionException extends IOException {
+
+	private final boolean tooOld;
+
+	public UnsupportedVersionException(boolean tooOld) {
+		this.tooOld = tooOld;
+	}
+
+	public boolean isTooOld() {
+		return tooOld;
+	}
+}

bramble-api/src/main/java/org/briarproject/bramble/api/sync/Message.java

@@ -1,6 +1,6 @@
 package org.briarproject.bramble.api.sync;
 
-import static org.briarproject.bramble.api.sync.SyncConstants.MAX_MESSAGE_LENGTH;
+import static org.briarproject.bramble.api.sync.SyncConstants.MAX_MESSAGE_BODY_LENGTH;
 import static org.briarproject.bramble.api.sync.SyncConstants.MESSAGE_HEADER_LENGTH;
 
 public class Message {
@@ -13,17 +13,15 @@ public class Message {
 	private final MessageId id;
 	private final GroupId groupId;
 	private final long timestamp;
-	private final byte[] raw;
+	private final byte[] body;
 
-	public Message(MessageId id, GroupId groupId, long timestamp, byte[] raw) {
-		if (raw.length <= MESSAGE_HEADER_LENGTH)
-			throw new IllegalArgumentException();
-		if (raw.length > MAX_MESSAGE_LENGTH)
+	public Message(MessageId id, GroupId groupId, long timestamp, byte[] body) {
+		if (body.length > MAX_MESSAGE_BODY_LENGTH)
 			throw new IllegalArgumentException();
 		this.id = id;
 		this.groupId = groupId;
 		this.timestamp = timestamp;
-		this.raw = raw;
+		this.body = body;
 	}
 
 	/**
@@ -51,14 +49,14 @@ public class Message {
 	 * Returns the length of the raw message in bytes.
 	 */
 	public int getRawLength() {
-		return raw.length;
+		return MESSAGE_HEADER_LENGTH + body.length;
 	}
 
 	/**
-	 * Returns the raw message.
+	 * Returns the message body.
 	 */
-	public byte[] getRaw() {
-		return raw;
+	public byte[] getBody() {
+		return body;
 	}
 
 	@Override

bramble-api/src/main/java/org/briarproject/bramble/api/sync/MessageFactory.java

@@ -9,5 +9,5 @@ public interface MessageFactory {
 
 	Message createMessage(byte[] raw);
 
-	Message createMessage(MessageId m, byte[] raw);
+	byte[] getRawMessage(Message m);
 }

bramble-api/src/test/java/org/briarproject/bramble/test/ArrayClock.java

@@ -0,0 +1,23 @@
+package org.briarproject.bramble.test;
+
+import org.briarproject.bramble.api.system.Clock;
+
+public class ArrayClock implements Clock {
+
+	private final long[] times;
+	private int index = 0;
+
+	public ArrayClock(long... times) {
+		this.times = times;
+	}
+
+	@Override
+	public long currentTimeMillis() {
+		return times[index++];
+	}
+
+	@Override
+	public void sleep(long milliseconds) throws InterruptedException {
+		Thread.sleep(milliseconds);
+	}
+}

bramble-api/src/test/java/org/briarproject/bramble/test/TestUtils.java

@@ -33,7 +33,6 @@ import static org.briarproject.bramble.api.properties.TransportPropertyConstants
 import static org.briarproject.bramble.api.sync.ClientId.MAX_CLIENT_ID_LENGTH;
 import static org.briarproject.bramble.api.sync.SyncConstants.MAX_GROUP_DESCRIPTOR_LENGTH;
 import static org.briarproject.bramble.api.sync.SyncConstants.MAX_MESSAGE_BODY_LENGTH;
-import static org.briarproject.bramble.api.sync.SyncConstants.MESSAGE_HEADER_LENGTH;
 import static org.briarproject.bramble.util.StringUtils.getRandomString;
 
 public class TestUtils {
@@ -132,13 +131,13 @@ public class TestUtils {
 
 	public static Message getMessage(GroupId groupId) {
 		int bodyLength = 1 + random.nextInt(MAX_MESSAGE_BODY_LENGTH);
-		return getMessage(groupId, MESSAGE_HEADER_LENGTH + bodyLength);
+		return getMessage(groupId, bodyLength);
 	}
 
-	public static Message getMessage(GroupId groupId, int rawLength) {
+	public static Message getMessage(GroupId groupId, int bodyLength) {
 		MessageId id = new MessageId(getRandomId());
-		byte[] raw = getRandomBytes(rawLength);
-		return new Message(id, groupId, timestamp, raw);
+		byte[] body = getRandomBytes(bodyLength);
+		return new Message(id, groupId, timestamp, body);
 	}
 
 	public static double getMedian(Collection<? extends Number> samples) {

bramble-core/src/main/java/org/briarproject/bramble/account/AccountManagerImpl.java

@@ -159,7 +159,8 @@ class AccountManagerImpl implements AccountManager {
 	@Override
 	public boolean createAccount(String name, String password) {
 		synchronized (stateChangeLock) {
-			// TODO don't allow creating another account if one already exists
+			if (hasDatabaseKey())
+				throw new AssertionError("Already have a database key");
 			LocalAuthor localAuthor = identityManager.createLocalAuthor(name);
 			identityManager.registerLocalAuthor(localAuthor);
 			SecretKey key = crypto.generateSecretKey();
@@ -182,6 +183,7 @@ class AccountManagerImpl implements AccountManager {
 			LOG.info("Deleting account");
 			IoUtils.deleteFileOrDir(databaseConfig.getDatabaseKeyDirectory());
 			IoUtils.deleteFileOrDir(databaseConfig.getDatabaseDirectory());
+			databaseKey = null;
 		}
 	}
 

bramble-core/src/main/java/org/briarproject/bramble/client/ClientHelperImpl.java

@@ -41,7 +41,6 @@ import static org.briarproject.bramble.api.identity.AuthorConstants.MAX_AUTHOR_N
 import static org.briarproject.bramble.api.identity.AuthorConstants.MAX_PUBLIC_KEY_LENGTH;
 import static org.briarproject.bramble.api.properties.TransportPropertyConstants.MAX_PROPERTIES_PER_TRANSPORT;
 import static org.briarproject.bramble.api.properties.TransportPropertyConstants.MAX_PROPERTY_LENGTH;
-import static org.briarproject.bramble.api.sync.SyncConstants.MESSAGE_HEADER_LENGTH;
 import static org.briarproject.bramble.util.ValidationUtils.checkLength;
 import static org.briarproject.bramble.util.ValidationUtils.checkSize;
 
@@ -147,9 +146,7 @@ class ClientHelperImpl implements ClientHelper {
 	@Override
 	public BdfList getMessageAsList(Transaction txn, MessageId m)
 			throws DbException, FormatException {
-		byte[] raw = db.getMessage(txn, m).getRaw();
-		return toList(raw, MESSAGE_HEADER_LENGTH,
-				raw.length - MESSAGE_HEADER_LENGTH);
+		return toList(db.getMessage(txn, m).getBody());
 	}
 
 	@Override
@@ -361,9 +358,7 @@ class ClientHelperImpl implements ClientHelper {
 
 	@Override
 	public BdfList toList(Message m) throws FormatException {
-		byte[] raw = m.getRaw();
-		return toList(raw, MESSAGE_HEADER_LENGTH,
-				raw.length - MESSAGE_HEADER_LENGTH);
+		return toList(m.getBody());
 	}
 
 	@Override

bramble-core/src/main/java/org/briarproject/bramble/db/Database.java

@@ -421,7 +421,7 @@ interface Database<T> {
 	 * Read-only.
 	 */
 	Collection<MessageId> getMessagesToOffer(T txn, ContactId c,
-			int maxMessages) throws DbException;
+			int maxMessages, int maxLatency) throws DbException;
 
 	/**
 	 * Returns the IDs of some messages that are eligible to be requested from
@@ -438,8 +438,8 @@ interface Database<T> {
 	 * <p/>
 	 * Read-only.
 	 */
-	Collection<MessageId> getMessagesToSend(T txn, ContactId c, int maxLength)
-			throws DbException;
+	Collection<MessageId> getMessagesToSend(T txn, ContactId c, int maxLength,
+			int maxLatency) throws DbException;
 
 	/**
 	 * Returns the IDs of any messages that need to be validated.
@@ -482,7 +482,7 @@ interface Database<T> {
 	 * Read-only.
 	 */
 	Collection<MessageId> getRequestedMessagesToSend(T txn, ContactId c,
-			int maxLength) throws DbException;
+			int maxLength, int maxLatency) throws DbException;
 
 	/**
 	 * Returns all settings in the given namespace.
@@ -647,11 +647,11 @@ interface Database<T> {
 			throws DbException;
 
 	/**
-	 * Updates the transmission count and expiry time of the given message
-	 * with respect to the given contact, using the latency of the transport
-	 * over which it was sent.
+	 * Updates the transmission count, expiry time and estimated time of arrival
+	 * of the given message with respect to the given contact, using the latency
+	 * of the transport over which it was sent.
 	 */
-	void updateExpiryTime(T txn, ContactId c, MessageId m, int maxLatency)
+	void updateExpiryTimeAndEta(T txn, ContactId c, MessageId m, int maxLatency)
 			throws DbException;
 
 	/**

bramble-core/src/main/java/org/briarproject/bramble/db/DatabaseComponentImpl.java

@@ -313,11 +313,12 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 		T txn = unbox(transaction);
 		if (!db.containsContact(txn, c))
 			throw new NoSuchContactException();
-		Collection<MessageId> ids = db.getMessagesToSend(txn, c, maxLength);
+		Collection<MessageId> ids =
+				db.getMessagesToSend(txn, c, maxLength, maxLatency);
 		List<Message> messages = new ArrayList<>(ids.size());
 		for (MessageId m : ids) {
 			messages.add(db.getMessage(txn, m));
-			db.updateExpiryTime(txn, c, m, maxLatency);
+			db.updateExpiryTimeAndEta(txn, c, m, maxLatency);
 		}
 		if (ids.isEmpty()) return null;
 		db.lowerRequestedFlag(txn, c, ids);
@@ -333,9 +334,11 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 		T txn = unbox(transaction);
 		if (!db.containsContact(txn, c))
 			throw new NoSuchContactException();
-		Collection<MessageId> ids = db.getMessagesToOffer(txn, c, maxMessages);
+		Collection<MessageId> ids =
+				db.getMessagesToOffer(txn, c, maxMessages, maxLatency);
 		if (ids.isEmpty()) return null;
-		for (MessageId m : ids) db.updateExpiryTime(txn, c, m, maxLatency);
+		for (MessageId m : ids)
+			db.updateExpiryTimeAndEta(txn, c, m, maxLatency);
 		return new Offer(ids);
 	}
 
@@ -362,12 +365,12 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 		T txn = unbox(transaction);
 		if (!db.containsContact(txn, c))
 			throw new NoSuchContactException();
-		Collection<MessageId> ids = db.getRequestedMessagesToSend(txn, c,
-				maxLength);
+		Collection<MessageId> ids =
+				db.getRequestedMessagesToSend(txn, c, maxLength, maxLatency);
 		List<Message> messages = new ArrayList<>(ids.size());
 		for (MessageId m : ids) {
 			messages.add(db.getMessage(txn, m));
-			db.updateExpiryTime(txn, c, m, maxLatency);
+			db.updateExpiryTimeAndEta(txn, c, m, maxLatency);
 		}
 		if (ids.isEmpty()) return null;
 		db.lowerRequestedFlag(txn, c, ids);
@@ -855,7 +858,8 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 		if (!db.containsMessage(txn, m))
 			throw new NoSuchMessageException();
 		if (db.getMessageState(txn, m) != DELIVERED)
-			throw new IllegalArgumentException("Shared undelivered message");
+			throw new IllegalArgumentException(
+					"Shared undelivered message");
 		db.setMessageShared(txn, m);
 		transaction.attach(new MessageSharedEvent(m));
 	}
@@ -881,7 +885,8 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 			throw new NoSuchMessageException();
 		State dependentState = db.getMessageState(txn, dependent.getId());
 		for (MessageId dependency : dependencies) {
-			db.addMessageDependency(txn, dependent, dependency, dependentState);
+			db.addMessageDependency(txn, dependent, dependency,
+					dependentState);
 		}
 	}
 
@@ -913,7 +918,8 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 		T txn = unbox(transaction);
 		for (KeySet ks : keys) {
 			TransportId t = ks.getTransportKeys().getTransportId();
-			if (db.containsTransport(txn, t)) db.updateTransportKeys(txn, ks);
+			if (db.containsTransport(txn, t))
+				db.updateTransportKeys(txn, ks);
 		}
 	}
 }

bramble-core/src/main/java/org/briarproject/bramble/db/DatabaseModule.java

@@ -4,6 +4,7 @@ import org.briarproject.bramble.api.db.DatabaseComponent;
 import org.briarproject.bramble.api.db.DatabaseConfig;
 import org.briarproject.bramble.api.event.EventBus;
 import org.briarproject.bramble.api.lifecycle.ShutdownManager;
+import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.system.Clock;
 
 import java.sql.Connection;
@@ -18,8 +19,9 @@ public class DatabaseModule {
 
 	@Provides
 	@Singleton
-	Database<Connection> provideDatabase(DatabaseConfig config, Clock clock) {
-		return new H2Database(config, clock);
+	Database<Connection> provideDatabase(DatabaseConfig config,
+			MessageFactory messageFactory, Clock clock) {
+		return new H2Database(config, messageFactory, clock);
 	}
 
 	@Provides

bramble-core/src/main/java/org/briarproject/bramble/db/H2Database.java

@@ -5,6 +5,7 @@ import org.briarproject.bramble.api.db.DatabaseConfig;
 import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.db.MigrationListener;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.util.StringUtils;
 
@@ -36,9 +37,10 @@ class H2Database extends JdbcDatabase {
 	private volatile SecretKey key = null;
 
 	@Inject
-	H2Database(DatabaseConfig config, Clock clock) {
+	H2Database(DatabaseConfig config, MessageFactory messageFactory,
+			Clock clock) {
 		super(HASH_TYPE, SECRET_TYPE, BINARY_TYPE, COUNTER_TYPE, STRING_TYPE,
-				clock);
+				messageFactory, clock);
 		this.config = config;
 		File dir = config.getDatabaseDirectory();
 		String path = new File(dir, "db").getAbsolutePath();

bramble-core/src/main/java/org/briarproject/bramble/db/HyperSqlDatabase.java

@@ -5,6 +5,7 @@ import org.briarproject.bramble.api.db.DatabaseConfig;
 import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.db.MigrationListener;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.util.StringUtils;
 
@@ -37,9 +38,10 @@ class HyperSqlDatabase extends JdbcDatabase {
 	private volatile SecretKey key = null;
 
 	@Inject
-	HyperSqlDatabase(DatabaseConfig config, Clock clock) {
+	HyperSqlDatabase(DatabaseConfig config, MessageFactory messageFactory,
+			Clock clock) {
 		super(HASH_TYPE, SECRET_TYPE, BINARY_TYPE, COUNTER_TYPE, STRING_TYPE,
-				clock);
+				messageFactory, clock);
 		this.config = config;
 		File dir = config.getDatabaseDirectory();
 		String path = new File(dir, "db").getAbsolutePath();

bramble-core/src/main/java/org/briarproject/bramble/db/JdbcDatabase.java

@@ -21,6 +21,7 @@ import org.briarproject.bramble.api.sync.Group;
 import org.briarproject.bramble.api.sync.Group.Visibility;
 import org.briarproject.bramble.api.sync.GroupId;
 import org.briarproject.bramble.api.sync.Message;
+import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.sync.MessageId;
 import org.briarproject.bramble.api.sync.MessageStatus;
 import org.briarproject.bramble.api.sync.ValidationManager.State;
@@ -37,6 +38,7 @@ import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.sql.Statement;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
@@ -54,13 +56,13 @@ import java.util.logging.Logger;
 import javax.annotation.Nullable;
 
 import static java.sql.Types.INTEGER;
-import static java.util.Collections.singletonList;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
 import static org.briarproject.bramble.api.db.Metadata.REMOVE;
 import static org.briarproject.bramble.api.sync.Group.Visibility.INVISIBLE;
 import static org.briarproject.bramble.api.sync.Group.Visibility.SHARED;
 import static org.briarproject.bramble.api.sync.Group.Visibility.VISIBLE;
+import static org.briarproject.bramble.api.sync.SyncConstants.MESSAGE_HEADER_LENGTH;
 import static org.briarproject.bramble.api.sync.ValidationManager.State.DELIVERED;
 import static org.briarproject.bramble.api.sync.ValidationManager.State.PENDING;
 import static org.briarproject.bramble.api.sync.ValidationManager.State.UNKNOWN;
@@ -77,7 +79,7 @@ import static org.briarproject.bramble.util.LogUtils.logException;
 abstract class JdbcDatabase implements Database<Connection> {
 
 	// Package access for testing
-	static final int CODE_SCHEMA_VERSION = 39;
+	static final int CODE_SCHEMA_VERSION = 40;
 
 	// Rotation period offsets for incoming transport keys
 	private static final int OFFSET_PREV = -1;
@@ -217,6 +219,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 					+ " requested BOOLEAN NOT NULL,"
 					+ " expiry BIGINT NOT NULL,"
 					+ " txCount INT NOT NULL,"
+					+ " eta BIGINT NOT NULL,"
 					+ " PRIMARY KEY (messageId, contactId),"
 					+ " FOREIGN KEY (messageId)"
 					+ " REFERENCES messages (messageId)"
@@ -305,6 +308,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 	// Different database libraries use different names for certain types
 	private final String hashType, secretType, binaryType;
 	private final String counterType, stringType;
+	private final MessageFactory messageFactory;
 	private final Clock clock;
 
 	// Locking: connectionsLock
@@ -320,12 +324,14 @@ abstract class JdbcDatabase implements Database<Connection> {
 	private final Condition connectionsChanged = connectionsLock.newCondition();
 
 	JdbcDatabase(String hashType, String secretType, String binaryType,
-			String counterType, String stringType, Clock clock) {
+			String counterType, String stringType,
+			MessageFactory messageFactory, Clock clock) {
 		this.hashType = hashType;
 		this.secretType = secretType;
 		this.binaryType = binaryType;
 		this.counterType = counterType;
 		this.stringType = stringType;
+		this.messageFactory = messageFactory;
 		this.clock = clock;
 	}
 
@@ -392,7 +398,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 
 	// Package access for testing
 	List<Migration<Connection>> getMigrations() {
-		return singletonList(new Migration38_39());
+		return Arrays.asList(new Migration38_39(), new Migration39_40());
 	}
 
 	private void storeSchemaVersion(Connection txn, int version)
@@ -727,7 +733,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 			ps.setLong(3, m.getTimestamp());
 			ps.setInt(4, state.getValue());
 			ps.setBoolean(5, messageShared);
-			byte[] raw = m.getRaw();
+			byte[] raw = messageFactory.getRawMessage(m);
 			ps.setInt(6, raw.length);
 			ps.setBytes(7, raw);
 			int affected = ps.executeUpdate();
@@ -741,7 +747,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 				boolean offered = removeOfferedMessage(txn, c, m.getId());
 				boolean seen = offered || (sender != null && c.equals(sender));
 				addStatus(txn, m.getId(), c, m.getGroupId(), m.getTimestamp(),
-						m.getRawLength(), state, e.getValue(), messageShared,
+						raw.length, state, e.getValue(), messageShared,
 						false, seen);
 			}
 			// Update denormalised column in messageDependencies if dependency
@@ -800,8 +806,9 @@ abstract class JdbcDatabase implements Database<Connection> {
 		try {
 			String sql = "INSERT INTO statuses (messageId, contactId, groupId,"
 					+ " timestamp, length, state, groupShared, messageShared,"
-					+ " deleted, ack, seen, requested, expiry, txCount)"
-					+ " VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, FALSE, 0, 0)";
+					+ " deleted, ack, seen, requested, expiry, txCount, eta)"
+					+ " VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, FALSE, 0, 0,"
+					+ " 0)";
 			ps = txn.prepareStatement(sql);
 			ps.setBytes(1, m.getBytes());
 			ps.setInt(2, c.getInt());
@@ -1501,7 +1508,10 @@ abstract class JdbcDatabase implements Database<Connection> {
 			rs.close();
 			ps.close();
 			if (raw == null) throw new MessageDeletedException();
-			return new Message(m, g, timestamp, raw);
+			if (raw.length < MESSAGE_HEADER_LENGTH) throw new AssertionError();
+			byte[] body = new byte[raw.length - MESSAGE_HEADER_LENGTH];
+			System.arraycopy(raw, MESSAGE_HEADER_LENGTH, body, 0, body.length);
+			return new Message(m, g, timestamp, body);
 		} catch (SQLException e) {
 			tryToClose(rs);
 			tryToClose(ps);
@@ -1861,8 +1871,9 @@ abstract class JdbcDatabase implements Database<Connection> {
 
 	@Override
 	public Collection<MessageId> getMessagesToOffer(Connection txn,
-			ContactId c, int maxMessages) throws DbException {
+			ContactId c, int maxMessages, int maxLatency) throws DbException {
 		long now = clock.currentTimeMillis();
+		long eta = now + maxLatency;
 		PreparedStatement ps = null;
 		ResultSet rs = null;
 		try {
@@ -1871,13 +1882,14 @@ abstract class JdbcDatabase implements Database<Connection> {
 					+ " AND groupShared = TRUE AND messageShared = TRUE"
 					+ " AND deleted = FALSE"
 					+ " AND seen = FALSE AND requested = FALSE"
-					+ " AND expiry < ?"
+					+ " AND (expiry <= ? OR eta > ?)"
 					+ " ORDER BY timestamp LIMIT ?";
 			ps = txn.prepareStatement(sql);
 			ps.setInt(1, c.getInt());
 			ps.setInt(2, DELIVERED.getValue());
 			ps.setLong(3, now);
-			ps.setInt(4, maxMessages);
+			ps.setLong(4, eta);
+			ps.setInt(5, maxMessages);
 			rs = ps.executeQuery();
 			List<MessageId> ids = new ArrayList<>();
 			while (rs.next()) ids.add(new MessageId(rs.getBytes(1)));
@@ -1918,8 +1930,9 @@ abstract class JdbcDatabase implements Database<Connection> {
 
 	@Override
 	public Collection<MessageId> getMessagesToSend(Connection txn, ContactId c,
-			int maxLength) throws DbException {
+			int maxLength, int maxLatency) throws DbException {
 		long now = clock.currentTimeMillis();
+		long eta = now + maxLatency;
 		PreparedStatement ps = null;
 		ResultSet rs = null;
 		try {
@@ -1928,12 +1941,13 @@ abstract class JdbcDatabase implements Database<Connection> {
 					+ " AND groupShared = TRUE AND messageShared = TRUE"
 					+ " AND deleted = FALSE"
 					+ " AND seen = FALSE"
-					+ " AND expiry < ?"
+					+ " AND (expiry <= ? OR eta > ?)"
 					+ " ORDER BY timestamp";
 			ps = txn.prepareStatement(sql);
 			ps.setInt(1, c.getInt());
 			ps.setInt(2, DELIVERED.getValue());
 			ps.setLong(3, now);
+			ps.setLong(4, eta);
 			rs = ps.executeQuery();
 			List<MessageId> ids = new ArrayList<>();
 			int total = 0;
@@ -2047,8 +2061,9 @@ abstract class JdbcDatabase implements Database<Connection> {
 
 	@Override
 	public Collection<MessageId> getRequestedMessagesToSend(Connection txn,
-			ContactId c, int maxLength) throws DbException {
+			ContactId c, int maxLength, int maxLatency) throws DbException {
 		long now = clock.currentTimeMillis();
+		long eta = now + maxLatency;
 		PreparedStatement ps = null;
 		ResultSet rs = null;
 		try {
@@ -2057,12 +2072,13 @@ abstract class JdbcDatabase implements Database<Connection> {
 					+ " AND groupShared = TRUE AND messageShared = TRUE"
 					+ " AND deleted = FALSE"
 					+ " AND seen = FALSE AND requested = TRUE"
-					+ " AND expiry < ?"
+					+ " AND (expiry <= ? OR eta > ?)"
 					+ " ORDER BY timestamp";
 			ps = txn.prepareStatement(sql);
 			ps.setInt(1, c.getInt());
 			ps.setInt(2, DELIVERED.getValue());
 			ps.setLong(3, now);
+			ps.setLong(4, eta);
 			rs = ps.executeQuery();
 			List<MessageId> ids = new ArrayList<>();
 			int total = 0;
@@ -2873,7 +2889,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 	}
 
 	@Override
-	public void updateExpiryTime(Connection txn, ContactId c, MessageId m,
+	public void updateExpiryTimeAndEta(Connection txn, ContactId c, MessageId m,
 			int maxLatency) throws DbException {
 		PreparedStatement ps = null;
 		ResultSet rs = null;
@@ -2889,13 +2905,16 @@ abstract class JdbcDatabase implements Database<Connection> {
 			if (rs.next()) throw new DbStateException();
 			rs.close();
 			ps.close();
-			sql = "UPDATE statuses SET expiry = ?, txCount = txCount + 1"
+			sql = "UPDATE statuses"
+					+ " SET expiry = ?, txCount = txCount + 1, eta = ?"
 					+ " WHERE messageId = ? AND contactId = ?";
 			ps = txn.prepareStatement(sql);
 			long now = clock.currentTimeMillis();
+			long eta = now + maxLatency;
 			ps.setLong(1, calculateExpiry(now, maxLatency, txCount));
-			ps.setBytes(2, m.getBytes());
-			ps.setInt(3, c.getInt());
+			ps.setLong(2, eta);
+			ps.setBytes(3, m.getBytes());
+			ps.setInt(4, c.getInt());
 			int affected = ps.executeUpdate();
 			if (affected != 1) throw new DbStateException();
 			ps.close();

bramble-core/src/main/java/org/briarproject/bramble/db/Migration39_40.java

@@ -0,0 +1,54 @@
+package org.briarproject.bramble.db;
+
+import org.briarproject.bramble.api.db.DbException;
+
+import java.sql.Connection;
+import java.sql.SQLException;
+import java.sql.Statement;
+import java.util.logging.Logger;
+
+import javax.annotation.Nullable;
+
+import static java.util.logging.Level.WARNING;
+import static org.briarproject.bramble.util.LogUtils.logException;
+
+class Migration39_40 implements Migration<Connection> {
+
+	private static final Logger LOG =
+			Logger.getLogger(Migration39_40.class.getName());
+
+	@Override
+	public int getStartVersion() {
+		return 39;
+	}
+
+	@Override
+	public int getEndVersion() {
+		return 40;
+	}
+
+	@Override
+	public void migrate(Connection txn) throws DbException {
+		Statement s = null;
+		try {
+			s = txn.createStatement();
+			s.execute("ALTER TABLE statuses"
+					+ " ADD eta BIGINT");
+			s.execute("UPDATE statuses SET eta = 0");
+			s.execute("ALTER TABLE statuses"
+					+ " ALTER COLUMN eta"
+					+ " SET NOT NULL");
+		} catch (SQLException e) {
+			tryToClose(s);
+			throw new DbException(e);
+		}
+	}
+
+	private void tryToClose(@Nullable Statement s) {
+		try {
+			if (s != null) s.close();
+		} catch (SQLException e) {
+			logException(LOG, WARNING, e);
+		}
+	}
+}

bramble-core/src/main/java/org/briarproject/bramble/keyagreement/PayloadParserImpl.java

@@ -1,13 +1,13 @@
 package org.briarproject.bramble.keyagreement;
 
 import org.briarproject.bramble.api.FormatException;
-import org.briarproject.bramble.api.UnsupportedVersionException;
 import org.briarproject.bramble.api.data.BdfList;
 import org.briarproject.bramble.api.data.BdfReader;
 import org.briarproject.bramble.api.data.BdfReaderFactory;
 import org.briarproject.bramble.api.keyagreement.Payload;
 import org.briarproject.bramble.api.keyagreement.PayloadParser;
 import org.briarproject.bramble.api.keyagreement.TransportDescriptor;
+import org.briarproject.bramble.api.keyagreement.UnsupportedVersionException;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.BluetoothConstants;
 import org.briarproject.bramble.api.plugin.LanTcpConstants;
@@ -21,6 +21,7 @@ import java.util.List;
 import javax.annotation.concurrent.Immutable;
 import javax.inject.Inject;
 
+import static org.briarproject.bramble.api.keyagreement.KeyAgreementConstants.BETA_PROTOCOL_VERSION;
 import static org.briarproject.bramble.api.keyagreement.KeyAgreementConstants.COMMIT_LENGTH;
 import static org.briarproject.bramble.api.keyagreement.KeyAgreementConstants.PROTOCOL_VERSION;
 import static org.briarproject.bramble.api.keyagreement.KeyAgreementConstants.TRANSPORT_ID_BLUETOOTH;
@@ -43,8 +44,11 @@ class PayloadParserImpl implements PayloadParser {
 		// First byte: the protocol version
 		int protocolVersion = in.read();
 		if (protocolVersion == -1) throw new FormatException();
-		if (protocolVersion != PROTOCOL_VERSION)
-			throw new UnsupportedVersionException();
+		if (protocolVersion != PROTOCOL_VERSION) {
+			boolean tooOld = protocolVersion < PROTOCOL_VERSION ||
+					protocolVersion == BETA_PROTOCOL_VERSION;
+			throw new UnsupportedVersionException(tooOld);
+		}
 		// The rest of the payload is a BDF list with one or more elements
 		BdfReader r = bdfReaderFactory.createReader(in);
 		BdfList payload = r.readList();

bramble-core/src/main/java/org/briarproject/bramble/sync/MessageFactoryImpl.java

@@ -39,11 +39,7 @@ class MessageFactoryImpl implements MessageFactory {
 		if (body.length > MAX_MESSAGE_BODY_LENGTH)
 			throw new IllegalArgumentException();
 		MessageId id = getMessageId(g, timestamp, body);
-		byte[] raw = new byte[MESSAGE_HEADER_LENGTH + body.length];
-		System.arraycopy(g.getBytes(), 0, raw, 0, UniqueId.LENGTH);
-		ByteUtils.writeUint64(timestamp, raw, UniqueId.LENGTH);
-		System.arraycopy(body, 0, raw, MESSAGE_HEADER_LENGTH, body.length);
-		return new Message(id, g, timestamp, raw);
+		return new Message(id, g, timestamp, body);
 	}
 
 	private MessageId getMessageId(GroupId g, long timestamp, byte[] body) {
@@ -69,18 +65,16 @@ class MessageFactoryImpl implements MessageFactory {
 		byte[] body = new byte[raw.length - MESSAGE_HEADER_LENGTH];
 		System.arraycopy(raw, MESSAGE_HEADER_LENGTH, body, 0, body.length);
 		MessageId id = getMessageId(g, timestamp, body);
-		return new Message(id, g, timestamp, raw);
+		return new Message(id, g, timestamp, body);
 	}
 
 	@Override
-	public Message createMessage(MessageId m, byte[] raw) {
-		if (raw.length < MESSAGE_HEADER_LENGTH)
-			throw new IllegalArgumentException();
-		if (raw.length > MAX_MESSAGE_LENGTH)
-			throw new IllegalArgumentException();
-		byte[] groupId = new byte[UniqueId.LENGTH];
-		System.arraycopy(raw, 0, groupId, 0, UniqueId.LENGTH);
-		long timestamp = ByteUtils.readUint64(raw, UniqueId.LENGTH);
-		return new Message(m, new GroupId(groupId), timestamp, raw);
+	public byte[] getRawMessage(Message m) {
+		byte[] body = m.getBody();
+		byte[] raw = new byte[MESSAGE_HEADER_LENGTH + body.length];
+		System.arraycopy(m.getGroupId().getBytes(), 0, raw, 0, UniqueId.LENGTH);
+		ByteUtils.writeUint64(m.getTimestamp(), raw, UniqueId.LENGTH);
+		System.arraycopy(body, 0, raw, MESSAGE_HEADER_LENGTH, body.length);
+		return raw;
 	}
 }

bramble-core/src/main/java/org/briarproject/bramble/sync/SyncRecordWriterFactoryImpl.java

@@ -3,6 +3,7 @@ package org.briarproject.bramble.sync;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.record.RecordWriter;
 import org.briarproject.bramble.api.record.RecordWriterFactory;
+import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.sync.SyncRecordWriter;
 import org.briarproject.bramble.api.sync.SyncRecordWriterFactory;
 
@@ -13,16 +14,19 @@ import javax.inject.Inject;
 @NotNullByDefault
 class SyncRecordWriterFactoryImpl implements SyncRecordWriterFactory {
 
+	private final MessageFactory messageFactory;
 	private final RecordWriterFactory recordWriterFactory;
 
 	@Inject
-	SyncRecordWriterFactoryImpl(RecordWriterFactory recordWriterFactory) {
+	SyncRecordWriterFactoryImpl(MessageFactory messageFactory,
+			RecordWriterFactory recordWriterFactory) {
+		this.messageFactory = messageFactory;
 		this.recordWriterFactory = recordWriterFactory;
 	}
 
 	@Override
 	public SyncRecordWriter createRecordWriter(OutputStream out) {
 		RecordWriter writer = recordWriterFactory.createRecordWriter(out);
-		return new SyncRecordWriterImpl(writer);
+		return new SyncRecordWriterImpl(messageFactory, writer);
 	}
 }

bramble-core/src/main/java/org/briarproject/bramble/sync/SyncRecordWriterImpl.java

@@ -5,6 +5,7 @@ import org.briarproject.bramble.api.record.Record;
 import org.briarproject.bramble.api.record.RecordWriter;
 import org.briarproject.bramble.api.sync.Ack;
 import org.briarproject.bramble.api.sync.Message;
+import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.sync.MessageId;
 import org.briarproject.bramble.api.sync.Offer;
 import org.briarproject.bramble.api.sync.Request;
@@ -25,10 +26,12 @@ import static org.briarproject.bramble.api.sync.SyncConstants.PROTOCOL_VERSION;
 @NotNullByDefault
 class SyncRecordWriterImpl implements SyncRecordWriter {
 
+	private final MessageFactory messageFactory;
 	private final RecordWriter writer;
 	private final ByteArrayOutputStream payload = new ByteArrayOutputStream();
 
-	SyncRecordWriterImpl(RecordWriter writer) {
+	SyncRecordWriterImpl(MessageFactory messageFactory, RecordWriter writer) {
+		this.messageFactory = messageFactory;
 		this.writer = writer;
 	}
 
@@ -46,7 +49,8 @@ class SyncRecordWriterImpl implements SyncRecordWriter {
 
 	@Override
 	public void writeMessage(Message m) throws IOException {
-		writer.writeRecord(new Record(PROTOCOL_VERSION, MESSAGE, m.getRaw()));
+		byte[] raw = messageFactory.getRawMessage(m);
+		writer.writeRecord(new Record(PROTOCOL_VERSION, MESSAGE, raw));
 	}
 
 	@Override

bramble-core/src/main/resources/bridges

@@ -2,7 +2,7 @@ Bridge 131.252.210.150:8081 0E858AC201BF0F3FA3C462F64844CBFFC7297A42
 Bridge 67.205.189.122:8443 12D64D5D44E20169585E7378580C0D33A872AD98
 Bridge 45.32.148.146:8443 0CE016FB2462D8BF179AE71F7D702D09DEAC3F1D
 Bridge 148.251.90.59:7510 019F727CA6DCA6CA5C90B55E477B7D87981E75BC
-Bridge 195.91.239.8:9001 BA83F62551545655BBEBBFF353A45438D73FD45A
 Bridge 45.55.1.74:8443 6F18FEFBB0CAECD5ABA755312FCCB34FC11A7AB8
-Bridge 97.107.131.168:65341 DCDA8A5F1E2C50A6756A58462E5CF4B6B2DFDE26
-Bridge 85.229.131.78:444 50E433CCC5FEC11CC34CB4D92033561E065EA106
+Bridge 85.229.131.78:444 50E433CCC5FEC11CC34CB4D92033561E065EA106
+Bridge 178.62.62.193:8443 391B1F9B6A28A1C5FAE1872283985F975E5DB029
+Bridge 45.76.29.92:8443 ECF1DD51A46FDEF2C50CED992EEEAE8DED18DA0C

bramble-core/src/test/java/org/briarproject/bramble/client/BdfMessageValidatorTest.java

@@ -16,10 +16,8 @@ import org.jmock.Expectations;
 import org.jmock.lib.legacy.ClassImposteriser;
 import org.junit.Test;
 
-import static org.briarproject.bramble.api.sync.SyncConstants.MESSAGE_HEADER_LENGTH;
 import static org.briarproject.bramble.api.transport.TransportConstants.MAX_CLOCK_DIFFERENCE;
 import static org.briarproject.bramble.test.TestUtils.getMessage;
-import static org.briarproject.bramble.test.TestUtils.getRandomBytes;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertSame;
 
@@ -58,8 +56,7 @@ public class BdfMessageValidatorTest extends ValidatorTestCase {
 		context.checking(new Expectations() {{
 			oneOf(clock).currentTimeMillis();
 			will(returnValue(timestamp - MAX_CLOCK_DIFFERENCE));
-			oneOf(clientHelper).toList(raw, MESSAGE_HEADER_LENGTH,
-					raw.length - MESSAGE_HEADER_LENGTH);
+			oneOf(clientHelper).toList(message.getBody());
 			will(returnValue(body));
 			oneOf(metadataEncoder).encode(dictionary);
 			will(returnValue(meta));
@@ -84,18 +81,11 @@ public class BdfMessageValidatorTest extends ValidatorTestCase {
 
 	@Test(expected = InvalidMessageException.class)
 	public void testRejectsTooShortMessage() throws Exception {
-		byte[] invalidRaw = getRandomBytes(MESSAGE_HEADER_LENGTH);
-		// Use a mock message so the length of the raw message can be invalid
-		Message invalidMessage = context.mock(Message.class);
+		Message invalidMessage = getMessage(groupId, 0);
 
 		context.checking(new Expectations() {{
-			//noinspection ResultOfMethodCallIgnored
-			oneOf(invalidMessage).getTimestamp();
-			will(returnValue(timestamp));
 			oneOf(clock).currentTimeMillis();
 			will(returnValue(timestamp));
-			oneOf(invalidMessage).getRaw();
-			will(returnValue(invalidRaw));
 		}});
 
 		failIfSubclassIsCalled.validateMessage(invalidMessage, group);
@@ -103,13 +93,12 @@ public class BdfMessageValidatorTest extends ValidatorTestCase {
 
 	@Test
 	public void testAcceptsMinLengthMessage() throws Exception {
-		Message shortMessage = getMessage(groupId, MESSAGE_HEADER_LENGTH + 1);
+		Message shortMessage = getMessage(groupId, 1);
 
 		context.checking(new Expectations() {{
 			oneOf(clock).currentTimeMillis();
 			will(returnValue(timestamp));
-			oneOf(clientHelper).toList(shortMessage.getRaw(),
-					MESSAGE_HEADER_LENGTH, 1);
+			oneOf(clientHelper).toList(shortMessage.getBody());
 			will(returnValue(body));
 			oneOf(metadataEncoder).encode(dictionary);
 			will(returnValue(meta));
@@ -137,8 +126,7 @@ public class BdfMessageValidatorTest extends ValidatorTestCase {
 		context.checking(new Expectations() {{
 			oneOf(clock).currentTimeMillis();
 			will(returnValue(timestamp));
-			oneOf(clientHelper).toList(raw, MESSAGE_HEADER_LENGTH,
-					raw.length - MESSAGE_HEADER_LENGTH);
+			oneOf(clientHelper).toList(message.getBody());
 			will(throwException(new FormatException()));
 		}});
 
@@ -150,8 +138,7 @@ public class BdfMessageValidatorTest extends ValidatorTestCase {
 		context.checking(new Expectations() {{
 			oneOf(clock).currentTimeMillis();
 			will(returnValue(timestamp));
-			oneOf(clientHelper).toList(raw, MESSAGE_HEADER_LENGTH,
-					raw.length - MESSAGE_HEADER_LENGTH);
+			oneOf(clientHelper).toList(message.getBody());
 			will(returnValue(body));
 		}});
 

bramble-core/src/test/java/org/briarproject/bramble/crypto/ScryptKdfTest.java

@@ -11,6 +11,8 @@ import java.util.HashSet;
 import java.util.Set;
 
 import static junit.framework.TestCase.assertTrue;
+
+import org.briarproject.bramble.test.ArrayClock;
 import static org.briarproject.bramble.test.TestUtils.getRandomBytes;
 import static org.briarproject.bramble.util.StringUtils.getRandomString;
 import static org.junit.Assert.assertEquals;
@@ -74,24 +76,4 @@ public class ScryptKdfTest extends BrambleTestCase {
 		PasswordBasedKdf kdf = new ScryptKdf(clock);
 		assertEquals(256, kdf.chooseCostParameter());
 	}
-
-	private static class ArrayClock implements Clock {
-
-		private final long[] times;
-		private int index = 0;
-
-		private ArrayClock(long... times) {
-			this.times = times;
-		}
-
-		@Override
-		public long currentTimeMillis() {
-			return times[index++];
-		}
-
-		@Override
-		public void sleep(long milliseconds) throws InterruptedException {
-			Thread.sleep(milliseconds);
-		}
-	}
 }

bramble-core/src/test/java/org/briarproject/bramble/db/DatabaseComponentImplTest.java

@@ -871,15 +871,15 @@ public class DatabaseComponentImplTest extends BrambleMockTestCase {
 			oneOf(database).containsContact(txn, contactId);
 			will(returnValue(true));
 			oneOf(database).getMessagesToSend(txn, contactId,
-					MAX_MESSAGE_LENGTH * 2);
+					MAX_MESSAGE_LENGTH * 2, maxLatency);
 			will(returnValue(ids));
 			oneOf(database).getMessage(txn, messageId);
 			will(returnValue(message));
-			oneOf(database).updateExpiryTime(txn, contactId, messageId,
+			oneOf(database).updateExpiryTimeAndEta(txn, contactId, messageId,
 					maxLatency);
 			oneOf(database).getMessage(txn, messageId1);
 			will(returnValue(message1));
-			oneOf(database).updateExpiryTime(txn, contactId, messageId1,
+			oneOf(database).updateExpiryTimeAndEta(txn, contactId, messageId1,
 					maxLatency);
 			oneOf(database).lowerRequestedFlag(txn, contactId, ids);
 			oneOf(database).commitTransaction(txn);
@@ -907,11 +907,11 @@ public class DatabaseComponentImplTest extends BrambleMockTestCase {
 			will(returnValue(txn));
 			oneOf(database).containsContact(txn, contactId);
 			will(returnValue(true));
-			oneOf(database).getMessagesToOffer(txn, contactId, 123);
+			oneOf(database).getMessagesToOffer(txn, contactId, 123, maxLatency);
 			will(returnValue(ids));
-			oneOf(database).updateExpiryTime(txn, contactId, messageId,
+			oneOf(database).updateExpiryTimeAndEta(txn, contactId, messageId,
 					maxLatency);
-			oneOf(database).updateExpiryTime(txn, contactId, messageId1,
+			oneOf(database).updateExpiryTimeAndEta(txn, contactId, messageId1,
 					maxLatency);
 			oneOf(database).commitTransaction(txn);
 		}});
@@ -967,15 +967,15 @@ public class DatabaseComponentImplTest extends BrambleMockTestCase {
 			oneOf(database).containsContact(txn, contactId);
 			will(returnValue(true));
 			oneOf(database).getRequestedMessagesToSend(txn, contactId,
-					MAX_MESSAGE_LENGTH * 2);
+					MAX_MESSAGE_LENGTH * 2, maxLatency);
 			will(returnValue(ids));
 			oneOf(database).getMessage(txn, messageId);
 			will(returnValue(message));
-			oneOf(database).updateExpiryTime(txn, contactId, messageId,
+			oneOf(database).updateExpiryTimeAndEta(txn, contactId, messageId,
 					maxLatency);
 			oneOf(database).getMessage(txn, messageId1);
 			will(returnValue(message1));
-			oneOf(database).updateExpiryTime(txn, contactId, messageId1,
+			oneOf(database).updateExpiryTimeAndEta(txn, contactId, messageId1,
 					maxLatency);
 			oneOf(database).lowerRequestedFlag(txn, contactId, ids);
 			oneOf(database).commitTransaction(txn);

bramble-core/src/test/java/org/briarproject/bramble/db/DatabaseMigrationTest.java

@@ -7,10 +7,12 @@ import org.briarproject.bramble.api.db.DatabaseConfig;
 import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.settings.Settings;
+import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.system.SystemClock;
 import org.briarproject.bramble.test.BrambleMockTestCase;
 import org.briarproject.bramble.test.TestDatabaseConfig;
+import org.briarproject.bramble.test.TestMessageFactory;
 import org.briarproject.bramble.test.TestUtils;
 import org.jmock.Expectations;
 import org.junit.After;
@@ -45,6 +47,7 @@ public abstract class DatabaseMigrationTest extends BrambleMockTestCase {
 
 	protected final DatabaseConfig config =
 			new TestDatabaseConfig(testDir, 1024 * 1024);
+	protected final MessageFactory messageFactory = new TestMessageFactory();
 	protected final SecretKey key = getSecretKey();
 	protected final Clock clock = new SystemClock();
 

bramble-core/src/test/java/org/briarproject/bramble/db/DatabasePerformanceComparisonTest.java

@@ -3,9 +3,11 @@ package org.briarproject.bramble.db;
 import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.db.DatabaseConfig;
 import org.briarproject.bramble.api.db.DbException;
+import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.system.SystemClock;
 import org.briarproject.bramble.test.TestDatabaseConfig;
+import org.briarproject.bramble.test.TestMessageFactory;
 import org.briarproject.bramble.test.UTest;
 
 import java.io.IOException;
@@ -30,7 +32,8 @@ public abstract class DatabasePerformanceComparisonTest
 	private SecretKey databaseKey = getSecretKey();
 
 	abstract Database<Connection> createDatabase(boolean conditionA,
-			DatabaseConfig databaseConfig, Clock clock);
+			DatabaseConfig databaseConfig, MessageFactory messageFactory,
+			Clock clock);
 
 	@Override
 	protected void benchmark(String name,
@@ -73,7 +76,8 @@ public abstract class DatabasePerformanceComparisonTest
 	private Database<Connection> openDatabase(boolean conditionA)
 			throws DbException {
 		Database<Connection> db = createDatabase(conditionA,
-				new TestDatabaseConfig(testDir, MAX_SIZE), new SystemClock());
+				new TestDatabaseConfig(testDir, MAX_SIZE),
+				new TestMessageFactory(), new SystemClock());
 		db.open(databaseKey, null);
 		return db;
 	}

bramble-core/src/test/java/org/briarproject/bramble/db/DatabasePerformanceTest.java

@@ -96,6 +96,9 @@ public abstract class DatabasePerformanceTest extends BrambleTestCase {
 	 */
 	private static final int STEADY_STATE_BLOCKS = 5;
 
+	// All our transports use a maximum latency of 30 seconds
+	private static final int MAX_LATENCY = 30 * 1000;
+
 	protected final File testDir = getTestDirectory();
 	private final File resultsFile = new File(getTestName() + ".tsv");
 	protected final Random random = new Random();
@@ -448,7 +451,7 @@ public abstract class DatabasePerformanceTest extends BrambleTestCase {
 		benchmark(name, db -> {
 			Connection txn = db.startTransaction();
 			db.getMessagesToOffer(txn, pickRandom(contacts).getId(),
-					MAX_MESSAGE_IDS);
+					MAX_MESSAGE_IDS, MAX_LATENCY);
 			db.commitTransaction(txn);
 		});
 	}
@@ -470,7 +473,7 @@ public abstract class DatabasePerformanceTest extends BrambleTestCase {
 		benchmark(name, db -> {
 			Connection txn = db.startTransaction();
 			db.getMessagesToSend(txn, pickRandom(contacts).getId(),
-					MAX_MESSAGE_IDS);
+					MAX_MESSAGE_IDS, MAX_LATENCY);
 			db.commitTransaction(txn);
 		});
 	}
@@ -521,7 +524,7 @@ public abstract class DatabasePerformanceTest extends BrambleTestCase {
 		benchmark(name, db -> {
 			Connection txn = db.startTransaction();
 			db.getRequestedMessagesToSend(txn, pickRandom(contacts).getId(),
-					MAX_MESSAGE_IDS);
+					MAX_MESSAGE_IDS, MAX_LATENCY);
 			db.commitTransaction(txn);
 		});
 	}

bramble-core/src/test/java/org/briarproject/bramble/db/DatabaseTraceTest.java

@@ -3,9 +3,11 @@ package org.briarproject.bramble.db;
 import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.db.DatabaseConfig;
 import org.briarproject.bramble.api.db.DbException;
+import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.system.SystemClock;
 import org.briarproject.bramble.test.TestDatabaseConfig;
+import org.briarproject.bramble.test.TestMessageFactory;
 import org.briarproject.bramble.util.IoUtils;
 
 import java.io.File;
@@ -24,7 +26,7 @@ public abstract class DatabaseTraceTest extends DatabasePerformanceTest {
 	private SecretKey databaseKey = getSecretKey();
 
 	abstract Database<Connection> createDatabase(DatabaseConfig databaseConfig,
-			Clock clock);
+			MessageFactory messageFactory, Clock clock);
 
 	@Nullable
 	protected abstract File getTraceFile();
@@ -46,7 +48,8 @@ public abstract class DatabaseTraceTest extends DatabasePerformanceTest {
 
 	private Database<Connection> openDatabase() throws DbException {
 		Database<Connection> db = createDatabase(
-				new TestDatabaseConfig(testDir, MAX_SIZE), new SystemClock());
+				new TestDatabaseConfig(testDir, MAX_SIZE),
+				new TestMessageFactory(), new SystemClock());
 		db.open(databaseKey, null);
 		return db;
 	}

bramble-core/src/test/java/org/briarproject/bramble/db/H2DatabasePerformanceTest.java

@@ -1,6 +1,7 @@
 package org.briarproject.bramble.db;
 
 import org.briarproject.bramble.api.db.DatabaseConfig;
+import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.system.Clock;
 import org.junit.Ignore;
 
@@ -13,7 +14,8 @@ public class H2DatabasePerformanceTest extends SingleDatabasePerformanceTest {
 	}
 
 	@Override
-	protected JdbcDatabase createDatabase(DatabaseConfig config, Clock clock) {
-		return new H2Database(config, clock);
+	protected JdbcDatabase createDatabase(DatabaseConfig config,
+			MessageFactory messageFactory, Clock clock) {
+		return new H2Database(config, messageFactory, clock);
 	}
 }

bramble-core/src/test/java/org/briarproject/bramble/db/H2DatabaseTest.java

@@ -1,16 +1,14 @@
 package org.briarproject.bramble.db;
 
 import org.briarproject.bramble.api.db.DatabaseConfig;
+import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.system.Clock;
 
 public class H2DatabaseTest extends JdbcDatabaseTest {
 
-	public H2DatabaseTest() throws Exception {
-		super();
-	}
-
 	@Override
-	protected JdbcDatabase createDatabase(DatabaseConfig config, Clock clock) {
-		return new H2Database(config, clock);
+	protected JdbcDatabase createDatabase(DatabaseConfig config,
+			MessageFactory messageFactory, Clock clock) {
+		return new H2Database(config, messageFactory, clock);
 	}
 }

bramble-core/src/test/java/org/briarproject/bramble/db/H2DatabaseTraceTest.java

@@ -1,6 +1,7 @@
 package org.briarproject.bramble.db;
 
 import org.briarproject.bramble.api.db.DatabaseConfig;
+import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.system.Clock;
 import org.junit.Ignore;
 
@@ -14,8 +15,8 @@ public class H2DatabaseTraceTest extends DatabaseTraceTest {
 
 	@Override
 	Database<Connection> createDatabase(DatabaseConfig databaseConfig,
-			Clock clock) {
-		return new H2Database(databaseConfig, clock) {
+			MessageFactory messageFactory, Clock clock) {
+		return new H2Database(databaseConfig, messageFactory, clock) {
 			@Override
 			@Nonnull
 			String getUrl() {

bramble-core/src/test/java/org/briarproject/bramble/db/H2HyperSqlDatabasePerformanceComparisonTest.java

@@ -1,6 +1,7 @@
 package org.briarproject.bramble.db;
 
 import org.briarproject.bramble.api.db.DatabaseConfig;
+import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.system.Clock;
 import org.junit.Ignore;
 
@@ -12,9 +13,11 @@ public class H2HyperSqlDatabasePerformanceComparisonTest
 
 	@Override
 	Database<Connection> createDatabase(boolean conditionA,
-			DatabaseConfig databaseConfig, Clock clock) {
-		if (conditionA) return new H2Database(databaseConfig, clock);
-		else return new HyperSqlDatabase(databaseConfig, clock);
+			DatabaseConfig databaseConfig, MessageFactory messageFactory,
+			Clock clock) {
+		if (conditionA)
+			return new H2Database(databaseConfig, messageFactory, clock);
+		else return new HyperSqlDatabase(databaseConfig, messageFactory, clock);
 	}
 
 	@Override

bramble-core/src/test/java/org/briarproject/bramble/db/H2MigrationTest.java

@@ -11,7 +11,7 @@ public class H2MigrationTest extends DatabaseMigrationTest {
 	@Override
 	Database<Connection> createDatabase(
 			List<Migration<Connection>> migrations) {
-		return new H2Database(config, clock) {
+		return new H2Database(config, messageFactory, clock) {
 			@Override
 			List<Migration<Connection>> getMigrations() {
 				return migrations;

bramble-core/src/test/java/org/briarproject/bramble/db/H2SelfDatabasePerformanceComparisonTest.java

@@ -1,6 +1,7 @@
 package org.briarproject.bramble.db;
 
 import org.briarproject.bramble.api.db.DatabaseConfig;
+import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.system.Clock;
 import org.junit.Ignore;
 
@@ -17,8 +18,9 @@ public class H2SelfDatabasePerformanceComparisonTest
 
 	@Override
 	Database<Connection> createDatabase(boolean conditionA,
-			DatabaseConfig databaseConfig, Clock clock) {
-		return new H2Database(databaseConfig, clock);
+			DatabaseConfig databaseConfig, MessageFactory messageFactory,
+			Clock clock) {
+		return new H2Database(databaseConfig, messageFactory, clock);
 	}
 
 	@Override

bramble-core/src/test/java/org/briarproject/bramble/db/H2SleepDatabasePerformanceComparisonTest.java

@@ -3,6 +3,7 @@ package org.briarproject.bramble.db;
 import org.briarproject.bramble.api.db.DatabaseConfig;
 import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.system.Clock;
 import org.junit.Ignore;
 
@@ -19,11 +20,12 @@ public class H2SleepDatabasePerformanceComparisonTest
 
 	@Override
 	Database<Connection> createDatabase(boolean conditionA,
-			DatabaseConfig databaseConfig, Clock clock) {
+			DatabaseConfig databaseConfig, MessageFactory messageFactory,
+			Clock clock) {
 		if (conditionA) {
-			return new H2Database(databaseConfig, clock);
+			return new H2Database(databaseConfig, messageFactory, clock);
 		} else {
-			return new H2Database(databaseConfig, clock) {
+			return new H2Database(databaseConfig, messageFactory, clock) {
 				@Override
 				@NotNullByDefault
 				public void commitTransaction(Connection txn)

bramble-core/src/test/java/org/briarproject/bramble/db/HyperSqlDatabasePerformanceTest.java

@@ -1,6 +1,7 @@
 package org.briarproject.bramble.db;
 
 import org.briarproject.bramble.api.db.DatabaseConfig;
+import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.system.Clock;
 import org.junit.Ignore;
 
@@ -14,7 +15,8 @@ public class HyperSqlDatabasePerformanceTest
 	}
 
 	@Override
-	protected JdbcDatabase createDatabase(DatabaseConfig config, Clock clock) {
-		return new HyperSqlDatabase(config, clock);
+	protected JdbcDatabase createDatabase(DatabaseConfig config,
+			MessageFactory messageFactory, Clock clock) {
+		return new HyperSqlDatabase(config, messageFactory, clock);
 	}
 }

bramble-core/src/test/java/org/briarproject/bramble/db/HyperSqlDatabaseTest.java

@@ -1,16 +1,14 @@
 package org.briarproject.bramble.db;
 
 import org.briarproject.bramble.api.db.DatabaseConfig;
+import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.system.Clock;
 
 public class HyperSqlDatabaseTest extends JdbcDatabaseTest {
 
-	public HyperSqlDatabaseTest() throws Exception {
-		super();
-	}
-
 	@Override
-	protected JdbcDatabase createDatabase(DatabaseConfig config, Clock clock) {
-		return new HyperSqlDatabase(config, clock);
+	protected JdbcDatabase createDatabase(DatabaseConfig config,
+			MessageFactory messageFactory, Clock clock) {
+		return new HyperSqlDatabase(config, messageFactory ,clock);
 	}
 }

bramble-core/src/test/java/org/briarproject/bramble/db/HyperSqlMigrationTest.java

@@ -9,9 +9,9 @@ import java.util.List;
 public class HyperSqlMigrationTest extends DatabaseMigrationTest {
 
 	@Override
-	Database<Connection> createDatabase(List<Migration<Connection>> migrations)
-			throws Exception {
-		return new HyperSqlDatabase(config, clock) {
+	Database<Connection> createDatabase(
+			List<Migration<Connection>> migrations) {
+		return new HyperSqlDatabase(config, messageFactory, clock) {
 			@Override
 			List<Migration<Connection>> getMigrations() {
 				return migrations;

bramble-core/src/test/java/org/briarproject/bramble/db/JdbcDatabaseTest.java

@@ -15,6 +15,7 @@ import org.briarproject.bramble.api.sync.ClientId;
 import org.briarproject.bramble.api.sync.Group;
 import org.briarproject.bramble.api.sync.GroupId;
 import org.briarproject.bramble.api.sync.Message;
+import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.sync.MessageId;
 import org.briarproject.bramble.api.sync.MessageStatus;
 import org.briarproject.bramble.api.sync.ValidationManager.State;
@@ -25,8 +26,10 @@ import org.briarproject.bramble.api.transport.KeySetId;
 import org.briarproject.bramble.api.transport.OutgoingKeys;
 import org.briarproject.bramble.api.transport.TransportKeys;
 import org.briarproject.bramble.system.SystemClock;
+import org.briarproject.bramble.test.ArrayClock;
 import org.briarproject.bramble.test.BrambleTestCase;
 import org.briarproject.bramble.test.TestDatabaseConfig;
+import org.briarproject.bramble.test.TestMessageFactory;
 import org.briarproject.bramble.test.TestUtils;
 import org.junit.After;
 import org.junit.Before;
@@ -58,6 +61,7 @@ import static org.briarproject.bramble.api.sync.ValidationManager.State.DELIVERE
 import static org.briarproject.bramble.api.sync.ValidationManager.State.INVALID;
 import static org.briarproject.bramble.api.sync.ValidationManager.State.PENDING;
 import static org.briarproject.bramble.api.sync.ValidationManager.State.UNKNOWN;
+import static org.briarproject.bramble.test.TestUtils.deleteTestDirectory;
 import static org.briarproject.bramble.test.TestUtils.getAuthor;
 import static org.briarproject.bramble.test.TestUtils.getClientId;
 import static org.briarproject.bramble.test.TestUtils.getGroup;
@@ -80,6 +84,9 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 
 	private static final int ONE_MEGABYTE = 1024 * 1024;
 	private static final int MAX_SIZE = 5 * ONE_MEGABYTE;
+	// All our transports use a maximum latency of 30 seconds
+	private static final int MAX_LATENCY = 30 * 1000;
+
 
 	private final SecretKey key = getSecretKey();
 	private final File testDir = getTestDirectory();
@@ -112,7 +119,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 	}
 
 	protected abstract JdbcDatabase createDatabase(DatabaseConfig config,
-			Clock clock);
+			MessageFactory messageFactory, Clock clock);
 
 	@Before
 	public void setUp() {
@@ -144,8 +151,8 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		assertTrue(db.containsContact(txn, contactId));
 		assertTrue(db.containsGroup(txn, groupId));
 		assertTrue(db.containsMessage(txn, messageId));
-		assertArrayEquals(message.getRaw(),
-				db.getMessage(txn, messageId).getRaw());
+		assertArrayEquals(message.getBody(),
+				db.getMessage(txn, messageId).getBody());
 
 		// Delete the records
 		db.removeMessage(txn, messageId);
@@ -197,16 +204,16 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 
 		// The contact has not seen the message, so it should be sendable
 		Collection<MessageId> ids =
-				db.getMessagesToSend(txn, contactId, ONE_MEGABYTE);
+				db.getMessagesToSend(txn, contactId, ONE_MEGABYTE, MAX_LATENCY);
 		assertEquals(singletonList(messageId), ids);
-		ids = db.getMessagesToOffer(txn, contactId, 100);
+		ids = db.getMessagesToOffer(txn, contactId, 100, MAX_LATENCY);
 		assertEquals(singletonList(messageId), ids);
 
 		// Changing the status to seen = true should make the message unsendable
 		db.raiseSeenFlag(txn, contactId, messageId);
-		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE);
+		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE, MAX_LATENCY);
 		assertTrue(ids.isEmpty());
-		ids = db.getMessagesToOffer(txn, contactId, 100);
+		ids = db.getMessagesToOffer(txn, contactId, 100, MAX_LATENCY);
 		assertTrue(ids.isEmpty());
 
 		db.commitTransaction(txn);
@@ -228,30 +235,30 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 
 		// The message has not been validated, so it should not be sendable
 		Collection<MessageId> ids = db.getMessagesToSend(txn, contactId,
-				ONE_MEGABYTE);
+				ONE_MEGABYTE, MAX_LATENCY);
 		assertTrue(ids.isEmpty());
-		ids = db.getMessagesToOffer(txn, contactId, 100);
+		ids = db.getMessagesToOffer(txn, contactId, 100, MAX_LATENCY);
 		assertTrue(ids.isEmpty());
 
 		// Marking the message delivered should make it sendable
 		db.setMessageState(txn, messageId, DELIVERED);
-		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE);
+		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE, MAX_LATENCY);
 		assertEquals(singletonList(messageId), ids);
-		ids = db.getMessagesToOffer(txn, contactId, 100);
+		ids = db.getMessagesToOffer(txn, contactId, 100, MAX_LATENCY);
 		assertEquals(singletonList(messageId), ids);
 
 		// Marking the message invalid should make it unsendable
 		db.setMessageState(txn, messageId, INVALID);
-		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE);
+		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE, MAX_LATENCY);
 		assertTrue(ids.isEmpty());
-		ids = db.getMessagesToOffer(txn, contactId, 100);
+		ids = db.getMessagesToOffer(txn, contactId, 100, MAX_LATENCY);
 		assertTrue(ids.isEmpty());
 
 		// Marking the message pending should make it unsendable
 		db.setMessageState(txn, messageId, PENDING);
-		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE);
+		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE, MAX_LATENCY);
 		assertTrue(ids.isEmpty());
-		ids = db.getMessagesToOffer(txn, contactId, 100);
+		ids = db.getMessagesToOffer(txn, contactId, 100, MAX_LATENCY);
 		assertTrue(ids.isEmpty());
 
 		db.commitTransaction(txn);
@@ -272,37 +279,37 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 
 		// The group is invisible, so the message should not be sendable
 		Collection<MessageId> ids = db.getMessagesToSend(txn, contactId,
-				ONE_MEGABYTE);
+				ONE_MEGABYTE, MAX_LATENCY);
 		assertTrue(ids.isEmpty());
-		ids = db.getMessagesToOffer(txn, contactId, 100);
+		ids = db.getMessagesToOffer(txn, contactId, 100, MAX_LATENCY);
 		assertTrue(ids.isEmpty());
 
 		// Making the group visible should not make the message sendable
 		db.addGroupVisibility(txn, contactId, groupId, false);
-		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE);
+		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE, MAX_LATENCY);
 		assertTrue(ids.isEmpty());
-		ids = db.getMessagesToOffer(txn, contactId, 100);
+		ids = db.getMessagesToOffer(txn, contactId, 100, MAX_LATENCY);
 		assertTrue(ids.isEmpty());
 
 		// Sharing the group should make the message sendable
 		db.setGroupVisibility(txn, contactId, groupId, true);
-		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE);
+		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE, MAX_LATENCY);
 		assertEquals(singletonList(messageId), ids);
-		ids = db.getMessagesToOffer(txn, contactId, 100);
+		ids = db.getMessagesToOffer(txn, contactId, 100, MAX_LATENCY);
 		assertEquals(singletonList(messageId), ids);
 
 		// Unsharing the group should make the message unsendable
 		db.setGroupVisibility(txn, contactId, groupId, false);
-		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE);
+		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE, MAX_LATENCY);
 		assertTrue(ids.isEmpty());
-		ids = db.getMessagesToOffer(txn, contactId, 100);
+		ids = db.getMessagesToOffer(txn, contactId, 100, MAX_LATENCY);
 		assertTrue(ids.isEmpty());
 
 		// Making the group invisible should make the message unsendable
 		db.removeGroupVisibility(txn, contactId, groupId);
-		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE);
+		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE, MAX_LATENCY);
 		assertTrue(ids.isEmpty());
-		ids = db.getMessagesToOffer(txn, contactId, 100);
+		ids = db.getMessagesToOffer(txn, contactId, 100, MAX_LATENCY);
 		assertTrue(ids.isEmpty());
 
 		db.commitTransaction(txn);
@@ -324,16 +331,16 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 
 		// The message is not shared, so it should not be sendable
 		Collection<MessageId> ids = db.getMessagesToSend(txn, contactId,
-				ONE_MEGABYTE);
+				ONE_MEGABYTE, MAX_LATENCY);
 		assertTrue(ids.isEmpty());
-		ids = db.getMessagesToOffer(txn, contactId, 100);
+		ids = db.getMessagesToOffer(txn, contactId, 100, MAX_LATENCY);
 		assertTrue(ids.isEmpty());
 
 		// Sharing the message should make it sendable
 		db.setMessageShared(txn, messageId);
-		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE);
+		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE, MAX_LATENCY);
 		assertEquals(singletonList(messageId), ids);
-		ids = db.getMessagesToOffer(txn, contactId, 100);
+		ids = db.getMessagesToOffer(txn, contactId, 100, MAX_LATENCY);
 		assertEquals(singletonList(messageId), ids);
 
 		db.commitTransaction(txn);
@@ -354,12 +361,13 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		db.addMessage(txn, message, DELIVERED, true, null);
 
 		// The message is sendable, but too large to send
-		Collection<MessageId> ids = db.getMessagesToSend(txn, contactId,
-				message.getRawLength() - 1);
+		Collection<MessageId> ids =
+				db.getMessagesToSend(txn, contactId, message.getRawLength() - 1,
+						MAX_LATENCY);
 		assertTrue(ids.isEmpty());
-
 		// The message is just the right size to send
-		ids = db.getMessagesToSend(txn, contactId, message.getRawLength());
+		ids = db.getMessagesToSend(txn, contactId, message.getRawLength(),
+				MAX_LATENCY);
 		assertEquals(singletonList(messageId), ids);
 
 		db.commitTransaction(txn);
@@ -422,19 +430,19 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 
 		// Retrieve the message from the database and mark it as sent
 		Collection<MessageId> ids = db.getMessagesToSend(txn, contactId,
-				ONE_MEGABYTE);
+				ONE_MEGABYTE, MAX_LATENCY);
 		assertEquals(singletonList(messageId), ids);
-		db.updateExpiryTime(txn, contactId, messageId, Integer.MAX_VALUE);
+		db.updateExpiryTimeAndEta(txn, contactId, messageId, MAX_LATENCY);
 
 		// The message should no longer be sendable
-		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE);
+		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE, MAX_LATENCY);
 		assertTrue(ids.isEmpty());
 
 		// Pretend that the message was acked
 		db.raiseSeenFlag(txn, contactId, messageId);
 
 		// The message still should not be sendable
-		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE);
+		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE, MAX_LATENCY);
 		assertTrue(ids.isEmpty());
 
 		db.commitTransaction(txn);
@@ -1515,7 +1523,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		assertFalse(status.isSeen());
 
 		// Pretend the message was sent to the contact
-		db.updateExpiryTime(txn, contactId, messageId, Integer.MAX_VALUE);
+		db.updateExpiryTimeAndEta(txn, contactId, messageId, Integer.MAX_VALUE);
 
 		// The message should be sent but not seen
 		status = db.getMessageStatus(txn, contactId, messageId);
@@ -1634,9 +1642,9 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 
 		// The message should be sendable
 		Collection<MessageId> ids = db.getMessagesToSend(txn, contactId,
-				ONE_MEGABYTE);
+				ONE_MEGABYTE, MAX_LATENCY);
 		assertEquals(singletonList(messageId), ids);
-		ids = db.getMessagesToOffer(txn, contactId, 100);
+		ids = db.getMessagesToOffer(txn, contactId, 100, MAX_LATENCY);
 		assertEquals(singletonList(messageId), ids);
 
 		// The message should be available
@@ -1644,7 +1652,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		assertEquals(messageId, m.getId());
 		assertEquals(groupId, m.getGroupId());
 		assertEquals(message.getTimestamp(), m.getTimestamp());
-		assertArrayEquals(message.getRaw(), m.getRaw());
+		assertArrayEquals(message.getBody(), m.getBody());
 
 		// Delete the message
 		db.deleteMessage(txn, messageId);
@@ -1653,9 +1661,9 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		assertTrue(db.containsVisibleMessage(txn, contactId, messageId));
 
 		// The message should not be sendable
-		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE);
+		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE, MAX_LATENCY);
 		assertTrue(ids.isEmpty());
-		ids = db.getMessagesToOffer(txn, contactId, 100);
+		ids = db.getMessagesToOffer(txn, contactId, 100, MAX_LATENCY);
 		assertTrue(ids.isEmpty());
 
 		// Requesting the message should throw an exception
@@ -1727,7 +1735,8 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 	@Test
 	public void testGetNextSendTime() throws Exception {
 		long now = System.currentTimeMillis();
-		Database<Connection> db = open(false, new StoppedClock(now));
+		Database<Connection> db = open(false, new TestMessageFactory(),
+				new StoppedClock(now));
 		Connection txn = db.startTransaction();
 
 		// Add a contact, a group and a message
@@ -1758,12 +1767,12 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 
 		// Update the message's expiry time as though we sent it - now the
 		// message should be sendable after one round-trip
-		db.updateExpiryTime(txn, contactId, messageId, 1000);
+		db.updateExpiryTimeAndEta(txn, contactId, messageId, 1000);
 		assertEquals(now + 2000, db.getNextSendTime(txn, contactId));
 
 		// Update the message's expiry time again - now it should be sendable
 		// after two round-trips
-		db.updateExpiryTime(txn, contactId, messageId, 1000);
+		db.updateExpiryTimeAndEta(txn, contactId, messageId, 1000);
 		assertEquals(now + 4000, db.getNextSendTime(txn, contactId));
 
 		// Delete the message - there should be no messages to send
@@ -1806,14 +1815,112 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		db.close();
 	}
 
-	private Database<Connection> open(boolean resume) throws Exception {
-		return open(resume, new SystemClock());
+	@Test
+	public void testMessageRetransmission() throws Exception {
+		long now = System.currentTimeMillis();
+		long steps[] = {now, now, now + MAX_LATENCY * 2 - 1,
+				now + MAX_LATENCY * 2};
+		Database<Connection> db =
+				open(false, new TestMessageFactory(), new ArrayClock(steps));
+		Connection txn = db.startTransaction();
+
+		// Add a contact, a shared group and a shared message
+		db.addLocalAuthor(txn, localAuthor);
+		assertEquals(contactId, db.addContact(txn, author, localAuthor.getId(),
+				true, true));
+		db.addGroup(txn, group);
+		db.addGroupVisibility(txn, contactId, groupId, true);
+		db.addMessage(txn, message, DELIVERED, true, null);
+
+		// Time: now
+		// Retrieve the message from the database
+		Collection<MessageId> ids = db.getMessagesToSend(txn, contactId,
+				ONE_MEGABYTE, MAX_LATENCY);
+		assertEquals(singletonList(messageId), ids);
+
+		// Time: now
+		// Mark the message as sent
+		db.updateExpiryTimeAndEta(txn, contactId, messageId, MAX_LATENCY);
+
+		// The message should expire after 2 * MAX_LATENCY
+		assertEquals(now + MAX_LATENCY * 2, db.getNextSendTime(txn, contactId));
+
+		// Time: now + MAX_LATENCY * 2 - 1
+		// The message should not yet be sendable
+		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE, MAX_LATENCY);
+		assertTrue(ids.isEmpty());
+
+		// Time: now + MAX_LATENCY * 2
+		// The message should have expired and should now be sendable
+		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE, MAX_LATENCY);
+		assertEquals(singletonList(messageId), ids);
+
+		db.commitTransaction(txn);
+		db.close();
 	}
 
-	private Database<Connection> open(boolean resume, Clock clock)
-			throws Exception {
-		Database<Connection> db = createDatabase(
-				new TestDatabaseConfig(testDir, MAX_SIZE), clock);
+
+	@Test
+	public void testFasterMessageRetransmission() throws Exception {
+		long now = System.currentTimeMillis();
+		long steps[] = {now, now, now, now, now + 1};
+		Database<Connection> db =
+				open(false, new TestMessageFactory(), new ArrayClock(steps));
+		Connection txn = db.startTransaction();
+
+		// Add a contact, a shared group and a shared message
+		db.addLocalAuthor(txn, localAuthor);
+		assertEquals(contactId, db.addContact(txn, author, localAuthor.getId(),
+				true, true));
+		db.addGroup(txn, group);
+		db.addGroupVisibility(txn, contactId, groupId, true);
+		db.addMessage(txn, message, DELIVERED, true, null);
+
+		// Time: now
+		// Retrieve the message from the database
+		Collection<MessageId> ids = db.getMessagesToSend(txn, contactId,
+				ONE_MEGABYTE, MAX_LATENCY);
+		assertEquals(singletonList(messageId), ids);
+
+		// Time: now
+		// Mark the message as sent
+		db.updateExpiryTimeAndEta(txn, contactId, messageId, MAX_LATENCY);
+
+		// The message should expire after 2 * MAX_LATENCY
+		assertEquals(now + MAX_LATENCY * 2, db.getNextSendTime(txn, contactId));
+
+		// Time: now
+		// The message should not be sendable via the same transport
+		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE, MAX_LATENCY);
+		assertTrue(ids.isEmpty());
+
+		// Time: now
+		// The message should be sendable via a transport with a faster ETA
+		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE,
+				MAX_LATENCY - 1);
+		assertEquals(singletonList(messageId), ids);
+
+		// Time: now + 1
+		// The message should no longer be sendable via the faster transport,
+		// as the ETA is now equal
+		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE,
+				MAX_LATENCY - 1);
+		assertTrue(ids.isEmpty());
+
+		db.commitTransaction(txn);
+		db.close();
+	}
+
+
+	private Database<Connection> open(boolean resume) throws Exception {
+		return open(resume, new TestMessageFactory(), new SystemClock());
+	}
+
+	private Database<Connection> open(boolean resume,
+			MessageFactory messageFactory, Clock clock) throws Exception {
+		Database<Connection> db =
+				createDatabase(new TestDatabaseConfig(testDir, MAX_SIZE),
+						messageFactory, clock);
 		if (!resume) TestUtils.deleteTestDirectory(testDir);
 		db.open(key, null);
 		return db;
@@ -1842,7 +1949,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 
 	@After
 	public void tearDown() {
-		TestUtils.deleteTestDirectory(testDir);
+		deleteTestDirectory(testDir);
 	}
 
 	private static class StoppedClock implements Clock {

bramble-core/src/test/java/org/briarproject/bramble/db/SingleDatabasePerformanceTest.java

@@ -3,9 +3,11 @@ package org.briarproject.bramble.db;
 import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.db.DatabaseConfig;
 import org.briarproject.bramble.api.db.DbException;
+import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.system.SystemClock;
 import org.briarproject.bramble.test.TestDatabaseConfig;
+import org.briarproject.bramble.test.TestMessageFactory;
 
 import java.io.IOException;
 import java.sql.Connection;
@@ -21,7 +23,7 @@ public abstract class SingleDatabasePerformanceTest
 		extends DatabasePerformanceTest {
 
 	abstract Database<Connection> createDatabase(DatabaseConfig databaseConfig,
-			Clock clock);
+			MessageFactory messageFactory, Clock clock);
 
 	private SecretKey databaseKey = getSecretKey();
 
@@ -43,7 +45,8 @@ public abstract class SingleDatabasePerformanceTest
 
 	private Database<Connection> openDatabase() throws DbException {
 		Database<Connection> db = createDatabase(
-				new TestDatabaseConfig(testDir, MAX_SIZE), new SystemClock());
+				new TestDatabaseConfig(testDir, MAX_SIZE),
+				new TestMessageFactory(), new SystemClock());
 		db.open(databaseKey, null);
 		return db;
 	}

bramble-core/src/test/java/org/briarproject/bramble/keyagreement/PayloadParserImplTest.java

@@ -0,0 +1,156 @@
+package org.briarproject.bramble.keyagreement;
+
+import org.briarproject.bramble.api.Bytes;
+import org.briarproject.bramble.api.FormatException;
+import org.briarproject.bramble.api.data.BdfList;
+import org.briarproject.bramble.api.data.BdfReader;
+import org.briarproject.bramble.api.data.BdfReaderFactory;
+import org.briarproject.bramble.api.keyagreement.Payload;
+import org.briarproject.bramble.api.keyagreement.UnsupportedVersionException;
+import org.briarproject.bramble.test.BrambleMockTestCase;
+import org.jmock.Expectations;
+import org.junit.Test;
+
+import java.io.ByteArrayInputStream;
+
+import static org.briarproject.bramble.api.keyagreement.KeyAgreementConstants.BETA_PROTOCOL_VERSION;
+import static org.briarproject.bramble.api.keyagreement.KeyAgreementConstants.COMMIT_LENGTH;
+import static org.briarproject.bramble.api.keyagreement.KeyAgreementConstants.PROTOCOL_VERSION;
+import static org.briarproject.bramble.test.TestUtils.getRandomBytes;
+import static org.junit.Assert.assertArrayEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+
+public class PayloadParserImplTest extends BrambleMockTestCase {
+
+	private final BdfReaderFactory bdfReaderFactory =
+			context.mock(BdfReaderFactory.class);
+	private final BdfReader bdfReader = context.mock(BdfReader.class);
+
+	private final PayloadParserImpl payloadParser =
+			new PayloadParserImpl(bdfReaderFactory);
+
+	@Test(expected = FormatException.class)
+	public void testThrowsFormatExceptionIfPayloadIsEmpty() throws Exception {
+		payloadParser.parse(new byte[0]);
+	}
+
+	@Test
+	public void testThrowsUnsupportedVersionExceptionForOldVersion()
+			throws Exception {
+		try {
+			payloadParser.parse(new byte[] {PROTOCOL_VERSION - 1});
+			fail();
+		} catch (UnsupportedVersionException e) {
+			assertTrue(e.isTooOld());
+		}
+	}
+
+	@Test
+	public void testThrowsUnsupportedVersionExceptionForBetaVersion()
+			throws Exception {
+		try {
+			payloadParser.parse(new byte[] {BETA_PROTOCOL_VERSION});
+			fail();
+		} catch (UnsupportedVersionException e) {
+			assertTrue(e.isTooOld());
+		}
+	}
+
+	@Test
+	public void testThrowsUnsupportedVersionExceptionForNewVersion()
+			throws Exception {
+		try {
+			payloadParser.parse(new byte[] {PROTOCOL_VERSION + 1});
+			fail();
+		} catch (UnsupportedVersionException e) {
+			assertFalse(e.isTooOld());
+		}
+	}
+
+	@Test(expected = FormatException.class)
+	public void testThrowsFormatExceptionForEmptyList() throws Exception {
+		context.checking(new Expectations() {{
+			oneOf(bdfReaderFactory).createReader(
+					with(any(ByteArrayInputStream.class)));
+			will(returnValue(bdfReader));
+			oneOf(bdfReader).readList();
+			will(returnValue(new BdfList()));
+		}});
+
+		payloadParser.parse(new byte[] {PROTOCOL_VERSION});
+	}
+
+	@Test(expected = FormatException.class)
+	public void testThrowsFormatExceptionForDataAfterList()
+			throws Exception {
+		byte[] commitment = getRandomBytes(COMMIT_LENGTH);
+
+		context.checking(new Expectations() {{
+			oneOf(bdfReaderFactory).createReader(
+					with(any(ByteArrayInputStream.class)));
+			will(returnValue(bdfReader));
+			oneOf(bdfReader).readList();
+			will(returnValue(BdfList.of(new Bytes(commitment))));
+			oneOf(bdfReader).eof();
+			will(returnValue(false));
+		}});
+
+		payloadParser.parse(new byte[] {PROTOCOL_VERSION});
+	}
+
+	@Test(expected = FormatException.class)
+	public void testThrowsFormatExceptionForShortCommitment()
+			throws Exception {
+		byte[] commitment = getRandomBytes(COMMIT_LENGTH - 1);
+
+		context.checking(new Expectations() {{
+			oneOf(bdfReaderFactory).createReader(
+					with(any(ByteArrayInputStream.class)));
+			will(returnValue(bdfReader));
+			oneOf(bdfReader).readList();
+			will(returnValue(BdfList.of(new Bytes(commitment))));
+			oneOf(bdfReader).eof();
+			will(returnValue(true));
+		}});
+
+		payloadParser.parse(new byte[] {PROTOCOL_VERSION});
+	}
+
+	@Test(expected = FormatException.class)
+	public void testThrowsFormatExceptionForLongCommitment()
+			throws Exception {
+		byte[] commitment = getRandomBytes(COMMIT_LENGTH + 1);
+
+		context.checking(new Expectations() {{
+			oneOf(bdfReaderFactory).createReader(
+					with(any(ByteArrayInputStream.class)));
+			will(returnValue(bdfReader));
+			oneOf(bdfReader).readList();
+			will(returnValue(BdfList.of(new Bytes(commitment))));
+			oneOf(bdfReader).eof();
+			will(returnValue(true));
+		}});
+
+		payloadParser.parse(new byte[] {PROTOCOL_VERSION});
+	}
+
+	@Test
+	public void testAcceptsPayloadWithNoDescriptors() throws Exception {
+		byte[] commitment = getRandomBytes(COMMIT_LENGTH);
+		context.checking(new Expectations() {{
+			oneOf(bdfReaderFactory).createReader(
+					with(any(ByteArrayInputStream.class)));
+			will(returnValue(bdfReader));
+			oneOf(bdfReader).readList();
+			will(returnValue(BdfList.of(new Bytes(commitment))));
+			oneOf(bdfReader).eof();
+			will(returnValue(true));
+		}});
+
+		Payload p = payloadParser.parse(new byte[] {PROTOCOL_VERSION});
+		assertArrayEquals(commitment, p.getCommitment());
+		assertTrue(p.getTransportDescriptors().isEmpty());
+	}
+}

bramble-core/src/test/java/org/briarproject/bramble/sync/SyncIntegrationTest.java

@@ -170,6 +170,6 @@ public class SyncIntegrationTest extends BrambleTestCase {
 				m2.getGroupId().getBytes());
 		assertEquals(m1.getTimestamp(), m2.getTimestamp());
 		assertEquals(m1.getRawLength(), m2.getRawLength());
-		assertArrayEquals(m1.getRaw(), m2.getRaw());
+		assertArrayEquals(m1.getBody(), m2.getBody());
 	}
 }

bramble-core/src/test/java/org/briarproject/bramble/test/TestMessageFactory.java

@@ -0,0 +1,30 @@
+package org.briarproject.bramble.test;
+
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.sync.GroupId;
+import org.briarproject.bramble.api.sync.Message;
+import org.briarproject.bramble.api.sync.MessageFactory;
+
+import static org.briarproject.bramble.api.sync.SyncConstants.MESSAGE_HEADER_LENGTH;
+
+@NotNullByDefault
+public class TestMessageFactory implements MessageFactory {
+
+	@Override
+	public Message createMessage(GroupId g, long timestamp, byte[] body) {
+		throw new UnsupportedOperationException();
+	}
+
+	@Override
+	public Message createMessage(byte[] raw) {
+		throw new UnsupportedOperationException();
+	}
+
+	@Override
+	public byte[] getRawMessage(Message m) {
+		byte[] body = m.getBody();
+		byte[] raw = new byte[MESSAGE_HEADER_LENGTH + body.length];
+		System.arraycopy(body, 0, raw, MESSAGE_HEADER_LENGTH, body.length);
+		return raw;
+	}
+}

bramble-core/src/test/java/org/briarproject/bramble/test/ValidatorTestCase.java

@@ -30,7 +30,6 @@ public abstract class ValidatorTestCase extends BrambleMockTestCase {
 	protected final Message message = getMessage(groupId);
 	protected final MessageId messageId = message.getId();
 	protected final long timestamp = message.getTimestamp();
-	protected final byte[] raw = message.getRaw();
 	protected final Author author = getAuthor();
 	protected final BdfList authorList = BdfList.of(
 			author.getFormatVersion(),

bramble-java/src/test/java/org/briarproject/bramble/plugin/tor/BridgeTest.java

@@ -10,9 +10,13 @@ import org.briarproject.bramble.api.system.ResourceProvider;
 import org.briarproject.bramble.test.BrambleJavaIntegrationTestComponent;
 import org.briarproject.bramble.test.BrambleTestCase;
 import org.briarproject.bramble.test.DaggerBrambleJavaIntegrationTestComponent;
-import org.junit.AfterClass;
+import org.briarproject.bramble.util.OsUtils;
+import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+import org.junit.runners.Parameterized.Parameters;
 
 import java.io.File;
 import java.util.List;
@@ -29,13 +33,20 @@ import static org.briarproject.bramble.test.TestUtils.deleteTestDirectory;
 import static org.briarproject.bramble.test.TestUtils.getTestDirectory;
 import static org.briarproject.bramble.test.TestUtils.isOptionalTestEnabled;
 import static org.junit.Assert.assertNotNull;
-import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 import static org.junit.Assume.assumeTrue;
 
+@RunWith(Parameterized.class)
 public class BridgeTest extends BrambleTestCase {
 
-	private final static long TIMEOUT = SECONDS.toMillis(23);
+	@Parameters
+	public static Iterable<String> data() {
+		BrambleJavaIntegrationTestComponent component =
+				DaggerBrambleJavaIntegrationTestComponent.builder().build();
+		return component.getCircumventionProvider().getBridges();
+	}
+
+	private final static long TIMEOUT = SECONDS.toMillis(30);
 
 	private final static Logger LOG =
 			Logger.getLogger(BridgeTest.class.getName());
@@ -53,17 +64,23 @@ public class BridgeTest extends BrambleTestCase {
 	@Inject
 	Clock clock;
 
-	private List<String> bridges;
-	private LinuxTorPluginFactory factory;
-	private final static File torDir = getTestDirectory();
+	private final File torDir = getTestDirectory();
+	private final String bridge;
 
-	private volatile String currentBridge = null;
+	private LinuxTorPluginFactory factory;
+
+	public BridgeTest(String bridge) {
+		this.bridge = bridge;
+	}
 
 	@Before
 	public void setUp() {
 		// Skip this test unless it's explicitly enabled in the environment
 		assumeTrue(isOptionalTestEnabled(BridgeTest.class));
 
+		// TODO: Remove this assumption when the plugin supports other platforms
+		assumeTrue(OsUtils.isLinux());
+
 		BrambleJavaIntegrationTestComponent component =
 				DaggerBrambleJavaIntegrationTestComponent.builder().build();
 		component.inject(this);
@@ -72,7 +89,6 @@ public class BridgeTest extends BrambleTestCase {
 		LocationUtils locationUtils = () -> "US";
 		SocketFactory torSocketFactory = SocketFactory.getDefault();
 
-		bridges = circumventionProvider.getBridges();
 		CircumventionProvider bridgeProvider = new CircumventionProvider() {
 			@Override
 			public boolean isTorProbablyBlocked(String countryCode) {
@@ -86,7 +102,7 @@ public class BridgeTest extends BrambleTestCase {
 
 			@Override
 			public List<String> getBridges() {
-				return singletonList(currentBridge);
+				return singletonList(bridge);
 			}
 		};
 		factory = new LinuxTorPluginFactory(ioExecutor, networkManager,
@@ -94,25 +110,18 @@ public class BridgeTest extends BrambleTestCase {
 				resourceProvider, bridgeProvider, clock, torDir);
 	}
 
-	@AfterClass
-	public static void tearDown() {
+	@After
+	public void tearDown() {
 		deleteTestDirectory(torDir);
 	}
 
 	@Test
 	public void testBridges() throws Exception {
-		assertTrue(bridges.size() > 0);
-
-		for (String bridge : bridges) testBridge(bridge);
-	}
-
-	private void testBridge(String bridge) throws Exception {
 		DuplexPlugin duplexPlugin =
 				factory.createPlugin(new TorPluginCallBack());
 		assertNotNull(duplexPlugin);
 		LinuxTorPlugin plugin = (LinuxTorPlugin) duplexPlugin;
 
-		currentBridge = bridge;
 		LOG.warning("Testing " + bridge);
 		try {
 			plugin.start();

bramble-java/src/test/java/org/briarproject/bramble/test/BrambleJavaIntegrationTestComponent.java

@@ -4,6 +4,7 @@ import org.briarproject.bramble.BrambleJavaModule;
 import org.briarproject.bramble.event.EventModule;
 import org.briarproject.bramble.plugin.PluginModule;
 import org.briarproject.bramble.plugin.tor.BridgeTest;
+import org.briarproject.bramble.plugin.tor.CircumventionProvider;
 import org.briarproject.bramble.system.SystemModule;
 
 import javax.inject.Singleton;
@@ -22,4 +23,5 @@ public interface BrambleJavaIntegrationTestComponent {
 
 	void inject(BridgeTest init);
 
+	CircumventionProvider getCircumventionProvider();
 }

briar-android/build.gradle

@@ -2,65 +2,6 @@ apply plugin: 'com.android.application'
 apply plugin: 'witness'
 apply from: 'witness.gradle'
 
-dependencies {
-	implementation project(path: ':briar-core', configuration: 'default')
-	implementation project(path: ':bramble-core', configuration: 'default')
-	implementation project(':bramble-android')
-
-	def supportVersion = '27.1.1'
-	implementation "com.android.support:support-v4:$supportVersion"
-	implementation("com.android.support:appcompat-v7:$supportVersion") {
-		exclude module: 'support-v4'
-	}
-	implementation("com.android.support:preference-v14:$supportVersion") {
-		exclude module: 'support-v4'
-	}
-	implementation("com.android.support:design:$supportVersion") {
-		exclude module: 'support-v4'
-		exclude module: 'recyclerview-v7'
-	}
-	implementation "com.android.support:cardview-v7:$supportVersion"
-	implementation "com.android.support:support-annotations:$supportVersion"
-	implementation 'com.android.support.constraint:constraint-layout:1.1.0'
-
-	implementation('ch.acra:acra:4.9.1') {
-		exclude module: 'support-v4'
-		exclude module: 'support-annotations'
-	}
-	implementation 'info.guardianproject.panic:panic:0.5'
-	implementation 'info.guardianproject.trustedintents:trustedintents:0.2'
-	implementation 'de.hdodenhof:circleimageview:2.2.0'
-	implementation 'com.google.zxing:core:3.3.0'
-	implementation 'uk.co.samuelwall:material-tap-target-prompt:2.8.0'
-	implementation 'com.vanniktech:emoji-google:0.5.1'
-
-	annotationProcessor 'com.google.dagger:dagger-compiler:2.0.2'
-
-	compileOnly 'javax.annotation:jsr250-api:1.0'
-
-	testImplementation project(path: ':bramble-api', configuration: 'testOutput')
-	testImplementation project(path: ':bramble-core', configuration: 'testOutput')
-	testImplementation 'org.robolectric:robolectric:3.8'
-	testImplementation 'org.robolectric:shadows-support-v4:3.3.2'
-	testImplementation 'org.mockito:mockito-core:2.13.0'
-	testImplementation 'junit:junit:4.12'
-	testImplementation "org.jmock:jmock:2.8.2"
-	testImplementation "org.jmock:jmock-junit4:2.8.2"
-	testImplementation "org.jmock:jmock-legacy:2.8.2"
-	testImplementation "org.hamcrest:hamcrest-library:1.3"
-	testImplementation "org.hamcrest:hamcrest-core:1.3"
-
-	def espressoVersion = '3.0.2'
-	androidTestImplementation "com.android.support.test.espresso:espresso-core:$espressoVersion"
-	androidTestImplementation "com.android.support.test.espresso:espresso-contrib:$espressoVersion"
-	androidTestImplementation "com.android.support.test.espresso:espresso-intents:$espressoVersion"
-	androidTestImplementation "tools.fastlane:screengrab:1.1.0"
-	androidTestImplementation "com.android.support.test.uiautomator:uiautomator-v18:2.1.3"
-	androidTestAnnotationProcessor "com.google.dagger:dagger-compiler:2.0.2"
-	androidTestCompileOnly 'javax.annotation:jsr250-api:1.0'
-	androidTestImplementation 'junit:junit:4.12'
-}
-
 def getStdout = { command, defaultValue ->
 	def stdout = new ByteArrayOutputStream()
 	try {
@@ -81,15 +22,15 @@ android {
 	defaultConfig {
 		minSdkVersion 15
 		targetSdkVersion 26
-		versionCode 10101
-		versionName "1.1.1"
+		versionCode 10102
+		versionName "1.1.2"
 		applicationId "org.briarproject.briar.android"
 		buildConfigField "String", "GitHash",
 				"\"${getStdout(['git', 'rev-parse', '--short=7', 'HEAD'], 'No commit hash')}\""
 		def now = (long) (System.currentTimeMillis() / 1000)
 		buildConfigField "Long", "BuildTimestamp",
 				"${getStdout(['git', 'log', '-n', '1', '--format=%ct'], now)}000L"
-		testInstrumentationRunner 'org.briarproject.briar.android.test.BriarTestRunner'
+		testInstrumentationRunner 'org.briarproject.briar.android.BriarTestRunner'
 	}
 
 	buildTypes {
@@ -144,6 +85,65 @@ android {
 	}
 }
 
+dependencies {
+	implementation project(path: ':briar-core', configuration: 'default')
+	implementation project(path: ':bramble-core', configuration: 'default')
+	implementation project(':bramble-android')
+
+	def supportVersion = '27.1.1'
+	implementation "com.android.support:support-v4:$supportVersion"
+	implementation("com.android.support:appcompat-v7:$supportVersion") {
+		exclude module: 'support-v4'
+	}
+	implementation("com.android.support:preference-v14:$supportVersion") {
+		exclude module: 'support-v4'
+	}
+	implementation("com.android.support:design:$supportVersion") {
+		exclude module: 'support-v4'
+		exclude module: 'recyclerview-v7'
+	}
+	implementation "com.android.support:cardview-v7:$supportVersion"
+	implementation "com.android.support:support-annotations:$supportVersion"
+	implementation 'com.android.support.constraint:constraint-layout:1.1.3'
+
+	implementation('ch.acra:acra:4.9.1') {
+		exclude module: 'support-v4'
+		exclude module: 'support-annotations'
+	}
+	implementation 'info.guardianproject.panic:panic:0.5'
+	implementation 'info.guardianproject.trustedintents:trustedintents:0.2'
+	implementation 'de.hdodenhof:circleimageview:2.2.0'
+	implementation 'com.google.zxing:core:3.3.0'
+	implementation 'uk.co.samuelwall:material-tap-target-prompt:2.8.0'
+	implementation 'com.vanniktech:emoji-google:0.5.1'
+
+	annotationProcessor 'com.google.dagger:dagger-compiler:2.0.2'
+
+	compileOnly 'javax.annotation:jsr250-api:1.0'
+
+	testImplementation project(path: ':bramble-api', configuration: 'testOutput')
+	testImplementation project(path: ':bramble-core', configuration: 'testOutput')
+	testImplementation 'org.robolectric:robolectric:3.8'
+	testImplementation 'org.robolectric:shadows-support-v4:3.3.2'
+	testImplementation 'org.mockito:mockito-core:2.13.0'
+	testImplementation 'junit:junit:4.12'
+	testImplementation "org.jmock:jmock:2.8.2"
+	testImplementation "org.jmock:jmock-junit4:2.8.2"
+	testImplementation "org.jmock:jmock-legacy:2.8.2"
+	testImplementation "org.hamcrest:hamcrest-library:1.3"
+	testImplementation "org.hamcrest:hamcrest-core:1.3"
+
+	def espressoVersion = '3.0.2'
+	androidTestImplementation "com.android.support.test.espresso:espresso-core:$espressoVersion"
+	androidTestImplementation "com.android.support.test.espresso:espresso-contrib:$espressoVersion"
+	androidTestImplementation "com.android.support.test.espresso:espresso-intents:$espressoVersion"
+	androidTestAnnotationProcessor "com.google.dagger:dagger-compiler:2.0.2"
+	androidTestCompileOnly 'javax.annotation:jsr250-api:1.0'
+	androidTestImplementation 'junit:junit:4.12'
+	androidTestScreenshotImplementation "tools.fastlane:screengrab:1.2.0"
+	androidTestScreenshotImplementation "com.android.support.test.uiautomator:uiautomator-v18:2.1.3"
+}
+
 task verifyTranslations {
 	doLast {
 		def file = project.file("src/main/res/values/arrays.xml")
@@ -153,8 +153,9 @@ task verifyTranslations {
 		lc.children().each { value -> translations.add(value.text()) }
 
 		def folders = ["default", "en-US"]
+		def exceptions = ["values-night", "values-v21", "values-ldrtl"]
 		project.file("src/main/res").eachDir { dir ->
-			if (dir.name.startsWith("values-") && !dir.name.endsWith("night") && !dir.name.endsWith("v21")) {
+			if (dir.name.startsWith("values-") && !exceptions.contains(dir.name)) {
 				folders.add(dir.name.substring(7).replace("-r", "-"))
 			}
 		}

briar-android/fastlane/Screengrabfile

@@ -1,9 +1,7 @@
 app_package_name "org.briarproject.briar.android.screenshot.debug"
 locales ['en-US']
-use_tests_in_classes([
-    'org.briarproject.briar.android.login.SetupActivityScreenshotTest',
-    'org.briarproject.briar.android.settings.SettingsActivityScreenshotTest',
-])
 app_apk_path "build/outputs/apk/screenshot/debug/briar-android-screenshot-debug.apk"
 tests_apk_path "build/outputs/apk/androidTest/screenshot/debug/briar-android-screenshot-debug-androidTest.apk"
-test_instrumentation_runner "org.briarproject.briar.android.test.BriarTestRunner"
+test_instrumentation_runner "org.briarproject.briar.android.BriarTestRunner"
+reinstall_app = true
+exit_on_test_failure = true

briar-android/fastlane/demo-mode-activate.sh

@@ -4,4 +4,8 @@ adb shell am broadcast -a com.android.systemui.demo -e command enter
 adb shell am broadcast -a com.android.systemui.demo -e command notifications -e visible false
 adb shell am broadcast -a com.android.systemui.demo -e command battery -e level 100
 adb shell am broadcast -a com.android.systemui.demo -e command network -e wifi show
-adb shell am broadcast -a com.android.systemui.demo -e command clock -e hhmm 1337
+adb shell am broadcast -a com.android.systemui.demo -e command clock -e hhmm 1337
+
+# workaround for Android Pie hidden API Espresso bug
+adb shell settings put global hidden_api_policy_pre_p_apps  1
+adb shell settings put global hidden_api_policy_p_apps 1

briar-android/proguard-test.txt

@@ -12,4 +12,4 @@
 -keep class junit.** { *; }
 -dontwarn junit.**
 
--dontwarn org.briarproject.briar.android.BriarTestComponentApplication
+-dontwarn org.briarproject.briar.android.**

briar-android/src/androidTest/java/org/briarproject/briar/android/BriarTestRunner.java

@@ -1,11 +1,9 @@
-package org.briarproject.briar.android.test;
+package org.briarproject.briar.android;
 
 import android.app.Application;
 import android.content.Context;
 import android.support.test.runner.AndroidJUnitRunner;
 
-import org.briarproject.briar.android.BriarTestComponentApplication;
-
 public class BriarTestRunner extends AndroidJUnitRunner {
 
 	@Override
@@ -13,8 +11,8 @@ public class BriarTestRunner extends AndroidJUnitRunner {
 			Context context)
 			throws InstantiationException, IllegalAccessException,
 			ClassNotFoundException {
-		return super.newApplication(cl, BriarTestComponentApplication.class.getName(),
-				context);
+		return super.newApplication(cl,
+				BriarTestComponentApplication.class.getName(), context);
 	}
 
 }

briar-android/src/androidTest/java/org/briarproject/briar/android/UiTest.java

@@ -0,0 +1,79 @@
+package org.briarproject.briar.android;
+
+import android.app.Activity;
+import android.content.Intent;
+import android.support.test.espresso.intent.rule.IntentsTestRule;
+
+import org.briarproject.bramble.api.account.AccountManager;
+import org.briarproject.bramble.api.lifecycle.LifecycleManager;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.briar.R;
+
+import javax.annotation.Nullable;
+import javax.inject.Inject;
+
+import static android.support.test.InstrumentationRegistry.getTargetContext;
+
+@SuppressWarnings("WeakerAccess")
+public abstract class UiTest {
+
+	protected final String USERNAME =
+			getTargetContext().getString(R.string.screenshot_alice);
+	protected static final String PASSWORD = "123456";
+
+	@Inject
+	protected AccountManager accountManager;
+	@Inject
+	protected LifecycleManager lifecycleManager;
+
+	public UiTest() {
+		BriarTestComponentApplication app =
+				(BriarTestComponentApplication) getTargetContext()
+						.getApplicationContext();
+		inject((BriarUiTestComponent) app.getApplicationComponent());
+	}
+
+	protected abstract void inject(BriarUiTestComponent component);
+
+	@NotNullByDefault
+	protected class CleanAccountTestRule<A extends Activity>
+			extends IntentsTestRule<A> {
+
+		@Nullable
+		private final Runnable runnable;
+
+		public CleanAccountTestRule(Class<A> activityClass) {
+			super(activityClass);
+			this.runnable = null;
+		}
+
+		/**
+		 * Use this if you need to run code before launching the activity.
+		 * Note: You need to use {@link #launchActivity(Intent)} yourself
+		 * to start the activity.
+		 */
+		public CleanAccountTestRule(Class<A> activityClass, Runnable runnable) {
+			super(activityClass, false, false);
+			this.runnable = runnable;
+		}
+
+		@Override
+		protected void beforeActivityLaunched() {
+			super.beforeActivityLaunched();
+			accountManager.deleteAccount();
+			accountManager.createAccount(USERNAME, PASSWORD);
+			if (runnable != null) {
+				Intent serviceIntent =
+						new Intent(getTargetContext(), BriarService.class);
+				getTargetContext().startService(serviceIntent);
+				try {
+					lifecycleManager.waitForStartup();
+				} catch (InterruptedException e) {
+					throw new AssertionError(e);
+				}
+				runnable.run();
+			}
+		}
+	}
+
+}

briar-android/src/androidTest/java/org/briarproject/briar/android/ViewActions.java

@@ -1,4 +1,4 @@
-package org.briarproject.briar.android.test;
+package org.briarproject.briar.android;
 
 import android.app.Activity;
 import android.support.test.espresso.PerformException;

briar-android/src/androidTest/java/org/briarproject/briar/android/test/ScreenshotTest.java

@@ -1,73 +0,0 @@
-package org.briarproject.briar.android.test;
-
-import android.app.Activity;
-import android.support.test.espresso.intent.rule.IntentsTestRule;
-import android.util.Log;
-
-import org.briarproject.bramble.api.account.AccountManager;
-import org.briarproject.bramble.api.lifecycle.LifecycleManager;
-import org.briarproject.briar.android.BriarTestComponentApplication;
-import org.briarproject.briar.android.BriarUiTestComponent;
-import org.junit.ClassRule;
-
-import javax.inject.Inject;
-
-import tools.fastlane.screengrab.Screengrab;
-import tools.fastlane.screengrab.UiAutomatorScreenshotStrategy;
-import tools.fastlane.screengrab.locale.LocaleTestRule;
-
-import static android.support.test.InstrumentationRegistry.getTargetContext;
-import static tools.fastlane.screengrab.Screengrab.setDefaultScreenshotStrategy;
-
-public abstract class ScreenshotTest {
-
-	@ClassRule
-	public static final LocaleTestRule localeTestRule = new LocaleTestRule();
-
-	protected static final String USERNAME = "Alice";
-	protected static final String PASSWORD = "123456";
-
-	@Inject
-	protected AccountManager accountManager;
-	@Inject
-	protected LifecycleManager lifecycleManager;
-
-	public ScreenshotTest() {
-		super();
-		setDefaultScreenshotStrategy(new UiAutomatorScreenshotStrategy());
-		BriarTestComponentApplication app =
-				(BriarTestComponentApplication) getTargetContext()
-						.getApplicationContext();
-		inject((BriarUiTestComponent) app.getApplicationComponent());
-	}
-
-	protected abstract void inject(BriarUiTestComponent component);
-
-	protected void screenshot(String name) {
-		try {
-			Screengrab.screenshot(name);
-		} catch (RuntimeException e) {
-			if (!e.getMessage().equals("Unable to capture screenshot."))
-				throw e;
-			// The tests should still pass when run from AndroidStudio
-			// without manually granting permissions like fastlane does.
-			Log.w("Screengrab", "Permission to write screenshot is missing.");
-		}
-	}
-
-	protected class CleanAccountTestRule<A extends Activity>
-			extends IntentsTestRule<A> {
-
-		public CleanAccountTestRule(Class<A> activityClass) {
-			super(activityClass);
-		}
-
-		@Override
-		protected void beforeActivityLaunched() {
-			super.beforeActivityLaunched();
-			accountManager.deleteAccount();
-			accountManager.createAccount(USERNAME, PASSWORD);
-		}
-	}
-
-}

briar-android/src/androidTestOfficial/java/org/briarproject/briar/android/BriarUiTestComponent.java

@@ -0,0 +1,25 @@
+package org.briarproject.briar.android;
+
+import org.briarproject.bramble.BrambleAndroidModule;
+import org.briarproject.bramble.BrambleCoreModule;
+import org.briarproject.bramble.account.BriarAccountModule;
+import org.briarproject.briar.BriarCoreModule;
+import org.briarproject.briar.android.navdrawer.NavDrawerActivityTest;
+
+import javax.inject.Singleton;
+
+import dagger.Component;
+
+@Singleton
+@Component(modules = {
+		AppModule.class,
+		BriarCoreModule.class,
+		BrambleAndroidModule.class,
+		BriarAccountModule.class,
+		BrambleCoreModule.class
+})
+public interface BriarUiTestComponent extends AndroidComponent {
+
+	void inject(NavDrawerActivityTest test);
+
+}

briar-android/src/androidTestOfficial/java/org/briarproject/briar/android/navdrawer/NavDrawerActivityTest.java

@@ -6,8 +6,8 @@ import android.view.Gravity;
 
 import org.briarproject.briar.R;
 import org.briarproject.briar.android.BriarUiTestComponent;
+import org.briarproject.briar.android.UiTest;
 import org.briarproject.briar.android.settings.SettingsActivity;
-import org.briarproject.briar.android.test.ScreenshotTest;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -23,7 +23,7 @@ import static android.support.test.espresso.matcher.ViewMatchers.withId;
 import static android.support.test.espresso.matcher.ViewMatchers.withText;
 
 @RunWith(AndroidJUnit4.class)
-public class NavDrawerActivityTest extends ScreenshotTest {
+public class NavDrawerActivityTest extends UiTest {
 
 	@Rule
 	public CleanAccountTestRule<NavDrawerActivity> testRule =

briar-android/src/androidTestScreenshot/java/org/briarproject/briar/android/BriarUiTestComponent.java

@@ -4,8 +4,7 @@ import org.briarproject.bramble.BrambleAndroidModule;
 import org.briarproject.bramble.BrambleCoreModule;
 import org.briarproject.bramble.account.BriarAccountModule;
 import org.briarproject.briar.BriarCoreModule;
-import org.briarproject.briar.android.login.SetupActivityScreenshotTest;
-import org.briarproject.briar.android.navdrawer.NavDrawerActivityTest;
+import org.briarproject.briar.android.contact.ConversationActivityScreenshotTest;
 import org.briarproject.briar.android.settings.SettingsActivityScreenshotTest;
 
 import javax.inject.Singleton;
@@ -22,8 +21,9 @@ import dagger.Component;
 })
 public interface BriarUiTestComponent extends AndroidComponent {
 
-	void inject(SetupActivityScreenshotTest test);
-	void inject(NavDrawerActivityTest test);
+	void inject(SetupDataTest test);
+
+	void inject(ConversationActivityScreenshotTest test);
 	void inject(SettingsActivityScreenshotTest test);
 
 }

briar-android/src/androidTestScreenshot/java/org/briarproject/briar/android/ScreenshotTest.java

@@ -0,0 +1,45 @@
+package org.briarproject.briar.android;
+
+import android.app.Activity;
+import android.util.Log;
+
+import org.briarproject.bramble.api.plugin.ConnectionRegistry;
+import org.briarproject.bramble.api.system.Clock;
+import org.briarproject.briar.api.test.TestDataCreator;
+import org.junit.ClassRule;
+
+import javax.inject.Inject;
+
+import tools.fastlane.screengrab.FalconScreenshotStrategy;
+import tools.fastlane.screengrab.Screengrab;
+import tools.fastlane.screengrab.locale.LocaleTestRule;
+
+public abstract class ScreenshotTest extends UiTest {
+
+	@ClassRule
+	public static final LocaleTestRule localeTestRule = new LocaleTestRule();
+
+	@Inject
+	protected TestDataCreator testDataCreator;
+	@Inject
+	protected ConnectionRegistry connectionRegistry;
+	@Inject
+	protected Clock clock;
+
+	protected void screenshot(String name, Activity activity) {
+		try {
+			Screengrab.screenshot(name, new FalconScreenshotStrategy(activity));
+		} catch (RuntimeException e) {
+			if (!e.getMessage().equals("Unable to capture screenshot."))
+				throw e;
+			// The tests should still pass when run from AndroidStudio
+			// without manually granting permissions like fastlane does.
+			Log.w("Screengrab", "Permission to write screenshot is missing.");
+		}
+	}
+
+	protected long getMinutesAgo(int minutes) {
+		return clock.currentTimeMillis() - minutes * 60 * 1000;
+	}
+
+}

briar-android/src/androidTestScreenshot/java/org/briarproject/briar/android/SetupDataTest.java

@@ -1,4 +1,4 @@
-package org.briarproject.briar.android.login;
+package org.briarproject.briar.android;
 
 import android.support.test.espresso.intent.rule.IntentsTestRule;
 import android.support.test.runner.AndroidJUnit4;
@@ -6,9 +6,12 @@ import android.support.test.uiautomator.UiDevice;
 import android.support.test.uiautomator.UiObject;
 import android.support.test.uiautomator.UiSelector;
 
+import org.briarproject.bramble.api.FormatException;
+import org.briarproject.bramble.api.contact.Contact;
+import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.briar.R;
-import org.briarproject.briar.android.BriarUiTestComponent;
-import org.briarproject.briar.android.test.ScreenshotTest;
+import org.briarproject.briar.android.login.OpenDatabaseActivity;
+import org.briarproject.briar.android.login.SetupActivity;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -26,14 +29,14 @@ import static android.support.test.espresso.matcher.ViewMatchers.isRoot;
 import static android.support.test.espresso.matcher.ViewMatchers.withId;
 import static android.support.test.espresso.matcher.ViewMatchers.withText;
 import static android.support.test.runner.lifecycle.Stage.PAUSED;
-import static junit.framework.Assert.assertTrue;
-import static org.briarproject.briar.android.test.ViewActions.waitForActivity;
-import static org.briarproject.briar.android.test.ViewActions.waitUntilMatches;
+import static org.briarproject.bramble.api.plugin.LanTcpConstants.ID;
+import static org.briarproject.briar.android.ViewActions.waitForActivity;
+import static org.briarproject.briar.android.ViewActions.waitUntilMatches;
 import static org.briarproject.briar.android.util.UiUtils.needsDozeWhitelisting;
-
+import static org.junit.Assert.assertTrue;
 
 @RunWith(AndroidJUnit4.class)
-public class SetupActivityScreenshotTest extends ScreenshotTest {
+public class SetupDataTest extends ScreenshotTest {
 
 	@Rule
 	public IntentsTestRule<SetupActivity> testRule =
@@ -61,7 +64,7 @@ public class SetupActivityScreenshotTest extends ScreenshotTest {
 		onView(withId(R.id.nickname_entry))
 				.perform(waitUntilMatches(withText(USERNAME)));
 
-		screenshot("manual_create_account");
+		screenshot("manual_create_account", testRule.getActivity());
 
 		onView(withId(R.id.next))
 				.check(matches(isDisplayed()))
@@ -94,13 +97,54 @@ public class SetupActivityScreenshotTest extends ScreenshotTest {
 		}
 
 		// wait for OpenDatabaseActivity to show up
-		onView(withId(R.id.progress))
-				.check(matches(isDisplayed()));
 		onView(isRoot())
 				.perform(waitForActivity(testRule.getActivity(), PAUSED));
 		intended(hasComponent(OpenDatabaseActivity.class.getName()));
 
 		assertTrue(accountManager.hasDatabaseKey());
+
+		lifecycleManager.waitForStartup();
+		createTestData();
+
+		// close expiry warning
+		onView(withId(R.id.expiryWarning))
+				.perform(waitUntilMatches(isDisplayed()));
+		onView(withId(R.id.expiryWarningClose))
+				.check(matches(isDisplayed()));
+		onView(withId(R.id.expiryWarningClose))
+				.perform(click());
+	}
+
+	private void createTestData() {
+		try {
+			createTestDataExceptions();
+		} catch (DbException | FormatException e) {
+			throw new AssertionError(e);
+		}
+	}
+
+	private void createTestDataExceptions()
+			throws DbException, FormatException {
+		String bobName =
+				getTargetContext().getString(R.string.screenshot_bob);
+		Contact bob = testDataCreator.addContact(bobName);
+
+		String bobHi = getTargetContext()
+				.getString(R.string.screenshot_message_1);
+		long bobTime = getMinutesAgo(2);
+		testDataCreator.addPrivateMessage(bob, bobHi, bobTime, true);
+
+		String aliceHi = getTargetContext()
+				.getString(R.string.screenshot_message_2);
+		long aliceTime = getMinutesAgo(1);
+		testDataCreator.addPrivateMessage(bob, aliceHi, aliceTime, false);
+
+		String bobHi2 = getTargetContext()
+				.getString(R.string.screenshot_message_3);
+		long bobTime2 = getMinutesAgo(0);
+		testDataCreator.addPrivateMessage(bob, bobHi2, bobTime2, true);
+
+		connectionRegistry.registerConnection(bob.getId(), ID, true);
 	}
 
 }

briar-android/src/androidTestScreenshot/java/org/briarproject/briar/android/contact/ConversationActivityScreenshotTest.java

@@ -0,0 +1,52 @@
+package org.briarproject.briar.android.contact;
+
+import android.content.Context;
+import android.content.Intent;
+import android.support.test.rule.ActivityTestRule;
+import android.support.test.runner.AndroidJUnit4;
+
+import org.briarproject.briar.R;
+import org.briarproject.briar.android.BriarUiTestComponent;
+import org.briarproject.briar.android.ScreenshotTest;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static android.support.test.InstrumentationRegistry.getInstrumentation;
+import static android.support.test.espresso.Espresso.onView;
+import static android.support.test.espresso.matcher.ViewMatchers.isCompletelyDisplayed;
+import static android.support.test.espresso.matcher.ViewMatchers.withId;
+import static android.support.test.espresso.matcher.ViewMatchers.withText;
+import static org.briarproject.briar.android.ViewActions.waitUntilMatches;
+import static org.briarproject.briar.android.contact.ConversationActivity.CONTACT_ID;
+import static org.hamcrest.Matchers.allOf;
+
+@RunWith(AndroidJUnit4.class)
+public class ConversationActivityScreenshotTest extends ScreenshotTest {
+
+	@Rule
+	public ActivityTestRule<ConversationActivity> testRule =
+			new ActivityTestRule<>(ConversationActivity.class, false, false);
+
+	@Override
+	protected void inject(BriarUiTestComponent component) {
+		component.inject(this);
+	}
+
+	@Test
+	public void messaging() throws Exception {
+		Context targetContext = getInstrumentation().getTargetContext();
+		Intent intent = new Intent(targetContext, ConversationActivity.class);
+		intent.putExtra(CONTACT_ID, 1);
+		testRule.launchActivity(intent);
+
+		onView(withId(R.id.conversationView))
+				.perform(waitUntilMatches(allOf(
+						withText(R.string.screenshot_message_3),
+						isCompletelyDisplayed())
+				));
+
+		screenshot("manual_messaging", testRule.getActivity());
+	}
+
+}

briar-android/src/androidTestScreenshot/java/org/briarproject/briar/android/settings/SettingsActivityScreenshotTest.java

@@ -2,14 +2,15 @@ package org.briarproject.briar.android.settings;
 
 import android.content.Intent;
 import android.support.test.espresso.contrib.DrawerActions;
+import android.support.test.rule.ActivityTestRule;
 import android.support.test.runner.AndroidJUnit4;
 import android.support.v7.widget.RecyclerView;
 import android.view.Gravity;
 
 import org.briarproject.briar.R;
 import org.briarproject.briar.android.BriarUiTestComponent;
+import org.briarproject.briar.android.ScreenshotTest;
 import org.briarproject.briar.android.navdrawer.NavDrawerActivity;
-import org.briarproject.briar.android.test.ScreenshotTest;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -26,15 +27,15 @@ import static android.support.test.espresso.matcher.ViewMatchers.withChild;
 import static android.support.test.espresso.matcher.ViewMatchers.withClassName;
 import static android.support.test.espresso.matcher.ViewMatchers.withId;
 import static android.support.test.espresso.matcher.ViewMatchers.withText;
-import static org.briarproject.briar.android.test.ViewActions.waitUntilMatches;
+import static org.briarproject.briar.android.ViewActions.waitUntilMatches;
 import static org.hamcrest.CoreMatchers.is;
 
 @RunWith(AndroidJUnit4.class)
 public class SettingsActivityScreenshotTest extends ScreenshotTest {
 
 	@Rule
-	public CleanAccountTestRule<SettingsActivity> testRule =
-			new CleanAccountTestRule<>(SettingsActivity.class);
+	public ActivityTestRule<SettingsActivity> testRule =
+			new ActivityTestRule<>(SettingsActivity.class);
 
 	@Override
 	protected void inject(BriarUiTestComponent component) {
@@ -46,7 +47,7 @@ public class SettingsActivityScreenshotTest extends ScreenshotTest {
 		onView(withText(R.string.settings_button))
 				.check(matches(isDisplayed()));
 
-		screenshot("manual_dark_theme_settings");
+		screenshot("manual_dark_theme_settings", testRule.getActivity());
 
 		// switch to dark theme
 		onView(withText(R.string.pref_theme_title))
@@ -56,10 +57,20 @@ public class SettingsActivityScreenshotTest extends ScreenshotTest {
 				.check(matches(isDisplayed()))
 				.perform(click());
 
-		// open nav drawer and remove expiry warning
-		openNavDrawer(true);
+		openNavDrawer();
 
-		screenshot("manual_dark_theme_nav_drawer");
+		screenshot("manual_dark_theme_nav_drawer", testRule.getActivity());
+
+		// switch to back to light theme
+		onView(withText(R.string.settings_button))
+				.check(matches(isDisplayed()))
+				.perform(click());
+		onView(withText(R.string.pref_theme_title))
+				.check(matches(isDisplayed()))
+				.perform(click());
+		onView(withText(R.string.pref_theme_light))
+				.check(matches(isDisplayed()))
+				.perform(click());
 	}
 
 	@Test
@@ -83,12 +94,11 @@ public class SettingsActivityScreenshotTest extends ScreenshotTest {
 				.check(matches(isDisplayed()))
 				.check(matches(isEnabled()));
 
-		screenshot("manual_app_lock");
+		screenshot("manual_app_lock", testRule.getActivity());
 
-		// no more expiry warning to remove, because sharedprefs cached?
-		openNavDrawer(false);
+		openNavDrawer();
 
-		screenshot("manual_app_lock_nav_drawer");
+		screenshot("manual_app_lock_nav_drawer", testRule.getActivity());
 	}
 
 	@Test
@@ -104,23 +114,15 @@ public class SettingsActivityScreenshotTest extends ScreenshotTest {
 				.check(matches(isDisplayed()))
 				.perform(waitUntilMatches(isEnabled()));
 
-		screenshot("manual_tor_settings");
+		screenshot("manual_tor_settings", testRule.getActivity());
 	}
 
-	private void openNavDrawer(boolean expiry) {
+	private void openNavDrawer() {
 		// start main activity
 		Intent i =
 				new Intent(testRule.getActivity(), NavDrawerActivity.class);
 		testRule.getActivity().startActivity(i);
 
-		// close expiry warning
-		if (expiry) {
-			onView(withId(R.id.expiryWarningClose))
-					.check(matches(isDisplayed()));
-			onView(withId(R.id.expiryWarningClose))
-					.perform(click());
-		}
-
 		// open navigation drawer
 		onView(withId(R.id.drawer_layout))
 				.check(matches(isClosed(Gravity.START)))

briar-android/src/main/AndroidManifest.xml

@@ -13,9 +13,10 @@
 	<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
 	<uses-permission android:name="android.permission.CAMERA" />
 	<uses-permission android:name="android.permission.INTERNET" />
+	<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
+	<uses-permission android:name="android.permission.USE_FINGERPRINT"/>
 	<uses-permission android:name="android.permission.VIBRATE" />
 	<uses-permission android:name="android.permission.WAKE_LOCK" />
-	<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
 	<uses-permission-sdk-23 android:name="android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS"/>
 	<uses-permission-sdk-23 android:name="android.permission.USE_BIOMETRIC" />
 
@@ -25,6 +26,7 @@
 		android:icon="@mipmap/ic_launcher_round"
 		android:label="@string/app_name"
 		android:logo="@mipmap/ic_launcher_round"
+		android:supportsRtl="true"
 		android:theme="@style/BriarTheme">
 
 		<receiver

briar-android/src/main/java/org/briarproject/briar/android/AndroidNotificationManagerImpl.java

@@ -41,13 +41,9 @@ import org.briarproject.briar.android.util.BriarNotificationBuilder;
 import org.briarproject.briar.api.android.AndroidNotificationManager;
 import org.briarproject.briar.api.blog.event.BlogPostAddedEvent;
 import org.briarproject.briar.api.forum.event.ForumPostReceivedEvent;
-import org.briarproject.briar.api.introduction.event.IntroductionRequestReceivedEvent;
-import org.briarproject.briar.api.introduction.event.IntroductionResponseReceivedEvent;
 import org.briarproject.briar.api.introduction.event.IntroductionSucceededEvent;
 import org.briarproject.briar.api.messaging.event.PrivateMessageReceivedEvent;
 import org.briarproject.briar.api.privategroup.event.GroupMessageAddedEvent;
-import org.briarproject.briar.api.sharing.event.InvitationRequestReceivedEvent;
-import org.briarproject.briar.api.sharing.event.InvitationResponseReceivedEvent;
 
 import java.util.Set;
 import java.util.concurrent.Callable;
@@ -235,19 +231,6 @@ class AndroidNotificationManagerImpl implements AndroidNotificationManager,
 		} else if (e instanceof BlogPostAddedEvent) {
 			BlogPostAddedEvent b = (BlogPostAddedEvent) e;
 			showBlogPostNotification(b.getGroupId());
-		} else if (e instanceof IntroductionRequestReceivedEvent) {
-			ContactId c = ((IntroductionRequestReceivedEvent) e).getContactId();
-			showContactNotification(c);
-		} else if (e instanceof IntroductionResponseReceivedEvent) {
-			ContactId c =
-					((IntroductionResponseReceivedEvent) e).getContactId();
-			showContactNotification(c);
-		} else if (e instanceof InvitationRequestReceivedEvent) {
-			ContactId c = ((InvitationRequestReceivedEvent) e).getContactId();
-			showContactNotification(c);
-		} else if (e instanceof InvitationResponseReceivedEvent) {
-			ContactId c = ((InvitationResponseReceivedEvent) e).getContactId();
-			showContactNotification(c);
 		} else if (e instanceof IntroductionSucceededEvent) {
 			showIntroductionNotification();
 		}
@@ -327,9 +310,7 @@ class AndroidNotificationManagerImpl implements AndroidNotificationManager,
 					R.plurals.private_message_notification_text, contactTotal,
 					contactTotal));
 			b.setNumber(contactTotal);
-			boolean showOnLockScreen =
-					settings.getBoolean(PREF_NOTIFY_LOCK_SCREEN, false);
-			b.setLockscreenVisibility(CATEGORY_MESSAGE, showOnLockScreen);
+			b.setNotificationCategory(CATEGORY_MESSAGE);
 			if (mayAlertAgain) setAlertProperties(b);
 			setDeleteIntent(b, CONTACT_URI);
 			Set<ContactId> contacts = contactCounts.keySet();
@@ -431,9 +412,7 @@ class AndroidNotificationManagerImpl implements AndroidNotificationManager,
 					R.plurals.group_message_notification_text, groupTotal,
 					groupTotal));
 			b.setNumber(groupTotal);
-			boolean showOnLockScreen =
-					settings.getBoolean(PREF_NOTIFY_LOCK_SCREEN, false);
-			b.setLockscreenVisibility(CATEGORY_SOCIAL, showOnLockScreen);
+			b.setNotificationCategory(CATEGORY_SOCIAL);
 			if (mayAlertAgain) setAlertProperties(b);
 			setDeleteIntent(b, GROUP_URI);
 			Set<GroupId> groups = groupCounts.keySet();
@@ -504,9 +483,7 @@ class AndroidNotificationManagerImpl implements AndroidNotificationManager,
 					R.plurals.forum_post_notification_text, forumTotal,
 					forumTotal));
 			b.setNumber(forumTotal);
-			boolean showOnLockScreen =
-					settings.getBoolean(PREF_NOTIFY_LOCK_SCREEN, false);
-			b.setLockscreenVisibility(CATEGORY_SOCIAL, showOnLockScreen);
+			b.setNotificationCategory(CATEGORY_SOCIAL);
 			if (mayAlertAgain) setAlertProperties(b);
 			setDeleteIntent(b, FORUM_URI);
 			Set<GroupId> forums = forumCounts.keySet();
@@ -575,9 +552,7 @@ class AndroidNotificationManagerImpl implements AndroidNotificationManager,
 					R.plurals.blog_post_notification_text, blogTotal,
 					blogTotal));
 			b.setNumber(blogTotal);
-			boolean showOnLockScreen =
-					settings.getBoolean(PREF_NOTIFY_LOCK_SCREEN, false);
-			b.setLockscreenVisibility(CATEGORY_SOCIAL, showOnLockScreen);
+			b.setNotificationCategory(CATEGORY_SOCIAL);
 			if (mayAlertAgain) setAlertProperties(b);
 			setDeleteIntent(b, BLOG_URI);
 			// Touching the notification shows the combined blog feed
@@ -618,9 +593,7 @@ class AndroidNotificationManagerImpl implements AndroidNotificationManager,
 		b.setContentText(appContext.getResources().getQuantityString(
 				R.plurals.introduction_notification_text, introductionTotal,
 				introductionTotal));
-		boolean showOnLockScreen =
-				settings.getBoolean(PREF_NOTIFY_LOCK_SCREEN, false);
-		b.setLockscreenVisibility(CATEGORY_MESSAGE, showOnLockScreen);
+		b.setNotificationCategory(CATEGORY_MESSAGE);
 		setAlertProperties(b);
 		setDeleteIntent(b, INTRODUCTION_URI);
 		// Touching the notification shows the contact list

briar-android/src/main/java/org/briarproject/briar/android/account/LockManagerImpl.java

@@ -101,6 +101,8 @@ public class LockManagerImpl implements LockManager, Service, EventListener {
 
 	@Override
 	public void stopService() {
+		timeoutMinutes = timeoutNever;
+		if (alarmSet) alarmManager.cancel(lockIntent);
 	}
 
 	@UiThread

briar-android/src/main/java/org/briarproject/briar/android/activity/BaseActivity.java

@@ -68,6 +68,11 @@ public abstract class BaseActivity extends AppCompatActivity
 	public void onCreate(@Nullable Bundle state) {
 		super.onCreate(state);
 
+		// WARNING: When removing this or making it possible to turn it off,
+		//          we need a solution for the app lock feature.
+		//          When the app is locked by a timeout and FLAG_SECURE is not
+		//          set, the app content becomes visible briefly before the
+		//          unlock screen is shown.
 		if (PREVENT_SCREENSHOTS) getWindow().addFlags(FLAG_SECURE);
 
 		AndroidComponent applicationComponent =

briar-android/src/main/java/org/briarproject/briar/android/blog/BlogControllerImpl.java

@@ -21,11 +21,11 @@ import org.briarproject.briar.android.controller.ActivityLifecycleController;
 import org.briarproject.briar.android.controller.handler.ResultExceptionHandler;
 import org.briarproject.briar.api.android.AndroidNotificationManager;
 import org.briarproject.briar.api.blog.Blog;
+import org.briarproject.briar.api.blog.BlogInvitationResponse;
 import org.briarproject.briar.api.blog.BlogManager;
 import org.briarproject.briar.api.blog.BlogSharingManager;
 import org.briarproject.briar.api.blog.event.BlogInvitationResponseReceivedEvent;
 import org.briarproject.briar.api.blog.event.BlogPostAddedEvent;
-import org.briarproject.briar.api.sharing.InvitationResponse;
 import org.briarproject.briar.api.sharing.event.ContactLeftShareableEvent;
 
 import java.util.ArrayList;
@@ -107,7 +107,7 @@ class BlogControllerImpl extends BaseControllerImpl
 		} else if (e instanceof BlogInvitationResponseReceivedEvent) {
 			BlogInvitationResponseReceivedEvent b =
 					(BlogInvitationResponseReceivedEvent) e;
-			InvitationResponse r = b.getResponse();
+			BlogInvitationResponse r = b.getMessageHeader();
 			if (r.getShareableId().equals(groupId) && r.wasAccepted()) {
 				LOG.info("Blog invitation accepted");
 				onBlogInvitationAccepted(b.getContactId());

briar-android/src/main/java/org/briarproject/briar/android/contact/ContactListFragment.java

@@ -1,7 +1,6 @@
 package org.briarproject.briar.android.contact;
 
 import android.content.Intent;
-import android.os.Build;
 import android.os.Bundle;
 import android.support.v4.app.ActivityCompat;
 import android.support.v4.app.ActivityOptionsCompat;
@@ -36,19 +35,10 @@ import org.briarproject.briar.android.fragment.BaseFragment;
 import org.briarproject.briar.android.keyagreement.ContactExchangeActivity;
 import org.briarproject.briar.android.view.BriarRecyclerView;
 import org.briarproject.briar.api.android.AndroidNotificationManager;
-import org.briarproject.briar.api.client.BaseMessageHeader;
 import org.briarproject.briar.api.client.MessageTracker.GroupCount;
-import org.briarproject.briar.api.introduction.IntroductionRequest;
-import org.briarproject.briar.api.introduction.IntroductionResponse;
-import org.briarproject.briar.api.introduction.event.IntroductionRequestReceivedEvent;
-import org.briarproject.briar.api.introduction.event.IntroductionResponseReceivedEvent;
 import org.briarproject.briar.api.messaging.ConversationManager;
 import org.briarproject.briar.api.messaging.PrivateMessageHeader;
 import org.briarproject.briar.api.messaging.event.PrivateMessageReceivedEvent;
-import org.briarproject.briar.api.sharing.InvitationRequest;
-import org.briarproject.briar.api.sharing.InvitationResponse;
-import org.briarproject.briar.api.sharing.event.InvitationRequestReceivedEvent;
-import org.briarproject.briar.api.sharing.event.InvitationResponseReceivedEvent;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -57,6 +47,7 @@ import java.util.logging.Logger;
 import javax.annotation.Nullable;
 import javax.inject.Inject;
 
+import static android.os.Build.VERSION.SDK_INT;
 import static android.support.v4.app.ActivityOptionsCompat.makeSceneTransitionAnimation;
 import static android.support.v4.view.ViewCompat.getTransitionName;
 import static java.util.logging.Level.WARNING;
@@ -122,7 +113,7 @@ public class ContactListFragment extends BaseFragment implements EventListener {
 					ContactId contactId = item.getContact().getId();
 					i.putExtra(CONTACT_ID, contactId.getInt());
 
-					if (Build.VERSION.SDK_INT >= 23) {
+					if (SDK_INT >= 23) {
 						ContactListItemViewHolder holder =
 								(ContactListItemViewHolder) list
 										.getRecyclerView()
@@ -256,41 +247,16 @@ public class ContactListFragment extends BaseFragment implements EventListener {
 			PrivateMessageReceivedEvent p = (PrivateMessageReceivedEvent) e;
 			PrivateMessageHeader h = p.getMessageHeader();
 			updateItem(p.getContactId(), h);
-		} else if (e instanceof IntroductionRequestReceivedEvent) {
-			LOG.info("Introduction request received, updating item");
-			IntroductionRequestReceivedEvent m =
-					(IntroductionRequestReceivedEvent) e;
-			IntroductionRequest ir = m.getIntroductionRequest();
-			updateItem(m.getContactId(), ir);
-		} else if (e instanceof IntroductionResponseReceivedEvent) {
-			LOG.info("Introduction response received, updating item");
-			IntroductionResponseReceivedEvent m =
-					(IntroductionResponseReceivedEvent) e;
-			IntroductionResponse ir = m.getIntroductionResponse();
-			updateItem(m.getContactId(), ir);
-		} else if (e instanceof InvitationRequestReceivedEvent) {
-			LOG.info("Invitation Request received, update item");
-			InvitationRequestReceivedEvent m =
-					(InvitationRequestReceivedEvent) e;
-			InvitationRequest ir = m.getRequest();
-			updateItem(m.getContactId(), ir);
-		} else if (e instanceof InvitationResponseReceivedEvent) {
-			LOG.info("Invitation response received, updating item");
-			InvitationResponseReceivedEvent m =
-					(InvitationResponseReceivedEvent) e;
-			InvitationResponse ir = m.getResponse();
-			updateItem(m.getContactId(), ir);
 		}
 	}
 
-	private void updateItem(ContactId c, BaseMessageHeader h) {
+	private void updateItem(ContactId c, PrivateMessageHeader h) {
 		runOnUiThreadUnlessDestroyed(() -> {
 			adapter.incrementRevision();
 			int position = adapter.findItemPosition(c);
 			ContactListItem item = adapter.getItemAt(position);
 			if (item != null) {
-				ConversationItem i = ConversationItem.from(getContext(), h);
-				item.addMessage(i);
+				item.addMessage(h);
 				adapter.updateItemAt(position, item);
 			}
 		});

briar-android/src/main/java/org/briarproject/briar/android/contact/ContactListItem.java

@@ -3,6 +3,7 @@ package org.briarproject.briar.android.contact;
 import org.briarproject.bramble.api.contact.Contact;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.briar.api.client.MessageTracker.GroupCount;
+import org.briarproject.briar.api.messaging.PrivateMessageHeader;
 
 import javax.annotation.concurrent.NotThreadSafe;
 
@@ -22,11 +23,10 @@ public class ContactListItem extends ContactItem {
 		this.timestamp = count.getLatestMsgTime();
 	}
 
-	void addMessage(ConversationItem message) {
+	void addMessage(PrivateMessageHeader h) {
 		empty = false;
-		if (message.getTime() > timestamp) timestamp = message.getTime();
-		if (!message.isRead())
-			unread++;
+		if (h.getTimestamp() > timestamp) timestamp = h.getTimestamp();
+		if (!h.isRead()) unread++;
 	}
 
 	boolean isEmpty() {

briar-android/src/main/java/org/briarproject/briar/android/contact/ConversationActivity.java

@@ -1,8 +1,11 @@
 package org.briarproject.briar.android.contact;
 
+import android.arch.lifecycle.MutableLiveData;
+import android.arch.lifecycle.Observer;
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.os.Bundle;
+import android.support.annotation.Nullable;
 import android.support.annotation.UiThread;
 import android.support.design.widget.Snackbar;
 import android.support.v4.content.ContextCompat;
@@ -50,6 +53,7 @@ import org.briarproject.briar.android.activity.ActivityComponent;
 import org.briarproject.briar.android.activity.BriarActivity;
 import org.briarproject.briar.android.blog.BlogActivity;
 import org.briarproject.briar.android.contact.ConversationAdapter.ConversationListener;
+import org.briarproject.briar.android.contact.ConversationVisitor.BodyCache;
 import org.briarproject.briar.android.forum.ForumActivity;
 import org.briarproject.briar.android.introduction.IntroductionActivity;
 import org.briarproject.briar.android.privategroup.conversation.GroupActivity;
@@ -62,24 +66,15 @@ import org.briarproject.briar.api.client.ProtocolStateException;
 import org.briarproject.briar.api.client.SessionId;
 import org.briarproject.briar.api.forum.ForumSharingManager;
 import org.briarproject.briar.api.introduction.IntroductionManager;
-import org.briarproject.briar.api.introduction.IntroductionMessage;
-import org.briarproject.briar.api.introduction.IntroductionRequest;
-import org.briarproject.briar.api.introduction.IntroductionResponse;
-import org.briarproject.briar.api.introduction.event.IntroductionRequestReceivedEvent;
-import org.briarproject.briar.api.introduction.event.IntroductionResponseReceivedEvent;
+import org.briarproject.briar.api.messaging.ConversationManager;
 import org.briarproject.briar.api.messaging.MessagingManager;
 import org.briarproject.briar.api.messaging.PrivateMessage;
 import org.briarproject.briar.api.messaging.PrivateMessageFactory;
 import org.briarproject.briar.api.messaging.PrivateMessageHeader;
+import org.briarproject.briar.api.messaging.PrivateRequest;
+import org.briarproject.briar.api.messaging.PrivateResponse;
 import org.briarproject.briar.api.messaging.event.PrivateMessageReceivedEvent;
 import org.briarproject.briar.api.privategroup.invitation.GroupInvitationManager;
-import org.briarproject.briar.api.sharing.InvitationMessage;
-import org.briarproject.briar.api.sharing.InvitationRequest;
-import org.briarproject.briar.api.sharing.InvitationResponse;
-import org.briarproject.briar.api.sharing.event.InvitationRequestReceivedEvent;
-import org.briarproject.briar.api.sharing.event.InvitationResponseReceivedEvent;
-import org.thoughtcrime.securesms.components.util.FutureTaskListener;
-import org.thoughtcrime.securesms.components.util.ListenableFutureTask;
 
 import java.util.ArrayList;
 import java.util.Collection;
@@ -87,13 +82,10 @@ import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
-import java.util.concurrent.Callable;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.Executor;
-import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.logging.Logger;
 
-import javax.annotation.Nullable;
 import javax.inject.Inject;
 
 import de.hdodenhof.circleimageview.CircleImageView;
@@ -120,7 +112,8 @@ import static uk.co.samuelwall.materialtaptargetprompt.MaterialTapTargetPrompt.S
 @MethodsNotNullByDefault
 @ParametersNotNullByDefault
 public class ConversationActivity extends BriarActivity
-		implements EventListener, ConversationListener, TextInputListener {
+		implements EventListener, ConversationListener, TextInputListener,
+		BodyCache {
 
 	public static final String CONTACT_ID = "briar.CONTACT_ID";
 
@@ -138,7 +131,9 @@ public class ConversationActivity extends BriarActivity
 	Executor cryptoExecutor;
 
 	private final Map<MessageId, String> bodyCache = new ConcurrentHashMap<>();
+	private final MutableLiveData<String> contactName = new MutableLiveData<>();
 
+	private ConversationVisitor visitor;
 	private ConversationAdapter adapter;
 	private Toolbar toolbar;
 	private CircleImageView toolbarAvatar;
@@ -147,24 +142,14 @@ public class ConversationActivity extends BriarActivity
 	private BriarRecyclerView list;
 	private TextInputView textInputView;
 
-	private final ListenableFutureTask<String> contactNameTask =
-			new ListenableFutureTask<>(new Callable<String>() {
-				@Override
-				public String call() throws Exception {
-					Contact c = contactManager.getContact(contactId);
-					contactName = c.getAuthor().getName();
-					return c.getAuthor().getName();
-				}
-			});
-	private final AtomicBoolean contactNameTaskStarted =
-			new AtomicBoolean(false);
-
 	// Fields that are accessed from background threads must be volatile
 	@Inject
 	volatile ContactManager contactManager;
 	@Inject
 	volatile MessagingManager messagingManager;
 	@Inject
+	volatile ConversationManager conversationManager;
+	@Inject
 	volatile EventBus eventBus;
 	@Inject
 	volatile SettingsManager settingsManager;
@@ -181,8 +166,6 @@ public class ConversationActivity extends BriarActivity
 
 	private volatile ContactId contactId;
 	@Nullable
-	private volatile String contactName;
-	@Nullable
 	private volatile AuthorId contactAuthorId;
 	@Nullable
 	private volatile GroupId messagingGroupId;
@@ -211,6 +194,7 @@ public class ConversationActivity extends BriarActivity
 		setTransitionName(toolbarAvatar, getAvatarTransitionName(contactId));
 		setTransitionName(toolbarStatus, getBulbTransitionName(contactId));
 
+		visitor = new ConversationVisitor(this, this, contactName);
 		adapter = new ConversationAdapter(this, this);
 		list = findViewById(R.id.conversationView);
 		list.setLayoutManager(new LinearLayoutManager(this));
@@ -294,9 +278,9 @@ public class ConversationActivity extends BriarActivity
 		runOnDbThread(() -> {
 			try {
 				long start = now();
-				if (contactName == null || contactAuthorId == null) {
+				if (contactAuthorId == null) {
 					Contact contact = contactManager.getContact(contactId);
-					contactName = contact.getAuthor().getName();
+					contactName.postValue(contact.getAuthor().getName());
 					contactAuthorId = contact.getAuthor().getId();
 				}
 				logDuration(LOG, "Loading contact", start);
@@ -310,12 +294,13 @@ public class ConversationActivity extends BriarActivity
 		});
 	}
 
+	// contactAuthorId and contactName are expected to be set
 	private void displayContactDetails() {
 		runOnUiThreadUnlessDestroyed(() -> {
 			//noinspection ConstantConditions
 			toolbarAvatar.setImageDrawable(
 					new IdenticonDrawable(contactAuthorId.getBytes()));
-			toolbarTitle.setText(contactName);
+			toolbarTitle.setText(contactName.getValue());
 		});
 	}
 
@@ -343,23 +328,9 @@ public class ConversationActivity extends BriarActivity
 			try {
 				long start = now();
 				Collection<PrivateMessageHeader> headers =
-						messagingManager.getMessageHeaders(contactId);
-				Collection<IntroductionMessage> introductions =
-						introductionManager.getIntroductionMessages(contactId);
-				Collection<InvitationMessage> forumInvitations =
-						forumSharingManager.getInvitationMessages(contactId);
-				Collection<InvitationMessage> blogInvitations =
-						blogSharingManager.getInvitationMessages(contactId);
-				Collection<InvitationMessage> groupInvitations =
-						groupInvitationManager.getInvitationMessages(contactId);
-				List<InvitationMessage> invitations = new ArrayList<>(
-						forumInvitations.size() + blogInvitations.size() +
-								groupInvitations.size());
-				invitations.addAll(forumInvitations);
-				invitations.addAll(blogInvitations);
-				invitations.addAll(groupInvitations);
+						conversationManager.getMessageHeaders(contactId);
 				logDuration(LOG, "Loading messages", start);
-				displayMessages(revision, headers, introductions, invitations);
+				displayMessages(revision, headers);
 			} catch (NoSuchContactException e) {
 				finishOnUiThread();
 			} catch (DbException e) {
@@ -369,15 +340,12 @@ public class ConversationActivity extends BriarActivity
 	}
 
 	private void displayMessages(int revision,
-			Collection<PrivateMessageHeader> headers,
-			Collection<IntroductionMessage> introductions,
-			Collection<InvitationMessage> invitations) {
+			Collection<PrivateMessageHeader> headers) {
 		runOnUiThreadUnlessDestroyed(() -> {
 			if (revision == adapter.getRevision()) {
 				adapter.incrementRevision();
 				textInputView.setSendButtonEnabled(true);
-				List<ConversationItem> items = createItems(headers,
-						introductions, invitations);
+				List<ConversationItem> items = createItems(headers);
 				adapter.addAll(items);
 				list.showData();
 				// Scroll to the bottom
@@ -396,41 +364,9 @@ public class ConversationActivity extends BriarActivity
 	 */
 	@SuppressWarnings("ConstantConditions")
 	private List<ConversationItem> createItems(
-			Collection<PrivateMessageHeader> headers,
-			Collection<IntroductionMessage> introductions,
-			Collection<InvitationMessage> invitations) {
-		int size =
-				headers.size() + introductions.size() + invitations.size();
-		List<ConversationItem> items = new ArrayList<>(size);
-		for (PrivateMessageHeader h : headers) {
-			ConversationItem item = ConversationItem.from(h);
-			String body = bodyCache.get(h.getId());
-			if (body == null) loadMessageBody(h.getId());
-			else item.setBody(body);
-			items.add(item);
-		}
-		for (IntroductionMessage m : introductions) {
-			ConversationItem item;
-			if (m instanceof IntroductionRequest) {
-				IntroductionRequest i = (IntroductionRequest) m;
-				item = ConversationItem.from(this, contactName, i);
-			} else {
-				IntroductionResponse i = (IntroductionResponse) m;
-				item = ConversationItem.from(this, contactName, i);
-			}
-			items.add(item);
-		}
-		for (InvitationMessage i : invitations) {
-			ConversationItem item;
-			if (i instanceof InvitationRequest) {
-				InvitationRequest r = (InvitationRequest) i;
-				item = ConversationItem.from(this, contactName, r);
-			} else {
-				InvitationResponse r = (InvitationResponse) i;
-				item = ConversationItem.from(this, contactName, r);
-			}
-			items.add(item);
-		}
+			Collection<PrivateMessageHeader> headers) {
+		List<ConversationItem> items = new ArrayList<>(headers.size());
+		for (PrivateMessageHeader h : headers) items.add(h.accept(visitor));
 		return items;
 	}
 
@@ -476,9 +412,7 @@ public class ConversationActivity extends BriarActivity
 			PrivateMessageReceivedEvent p = (PrivateMessageReceivedEvent) e;
 			if (p.getContactId().equals(contactId)) {
 				LOG.info("Message received, adding");
-				PrivateMessageHeader h = p.getMessageHeader();
-				addConversationItem(ConversationItem.from(h));
-				loadMessageBody(h.getId());
+				onNewPrivateMessage(p.getMessageHeader());
 			}
 		} else if (e instanceof MessagesSentEvent) {
 			MessagesSentEvent m = (MessagesSentEvent) e;
@@ -504,38 +438,6 @@ public class ConversationActivity extends BriarActivity
 				LOG.info("Contact disconnected");
 				displayContactOnlineStatus();
 			}
-		} else if (e instanceof IntroductionRequestReceivedEvent) {
-			IntroductionRequestReceivedEvent event =
-					(IntroductionRequestReceivedEvent) e;
-			if (event.getContactId().equals(contactId)) {
-				LOG.info("Introduction request received, adding...");
-				IntroductionRequest ir = event.getIntroductionRequest();
-				handleIntroductionRequest(ir);
-			}
-		} else if (e instanceof IntroductionResponseReceivedEvent) {
-			IntroductionResponseReceivedEvent event =
-					(IntroductionResponseReceivedEvent) e;
-			if (event.getContactId().equals(contactId)) {
-				LOG.info("Introduction response received, adding...");
-				IntroductionResponse ir = event.getIntroductionResponse();
-				handleIntroductionResponse(ir);
-			}
-		} else if (e instanceof InvitationRequestReceivedEvent) {
-			InvitationRequestReceivedEvent event =
-					(InvitationRequestReceivedEvent) e;
-			if (event.getContactId().equals(contactId)) {
-				LOG.info("Invitation received, adding...");
-				InvitationRequest ir = event.getRequest();
-				handleInvitationRequest(ir);
-			}
-		} else if (e instanceof InvitationResponseReceivedEvent) {
-			InvitationResponseReceivedEvent event =
-					(InvitationResponseReceivedEvent) e;
-			if (event.getContactId().equals(contactId)) {
-				LOG.info("Invitation response received, adding...");
-				InvitationResponse ir = event.getResponse();
-				handleInvitationResponse(ir);
-			}
 		}
 	}
 
@@ -548,84 +450,33 @@ public class ConversationActivity extends BriarActivity
 		});
 	}
 
-	private void handleIntroductionRequest(IntroductionRequest m) {
-		getContactNameTask().addListener(new FutureTaskListener<String>() {
-			@Override
-			public void onSuccess(String contactName) {
-				runOnUiThreadUnlessDestroyed(() -> {
-					ConversationItem item = ConversationItem
-							.from(ConversationActivity.this, contactName, m);
-					addConversationItem(item);
-				});
-			}
-
-			@Override
-			public void onFailure(Throwable exception) {
-				runOnUiThreadUnlessDestroyed(
-						() -> handleDbException((DbException) exception));
+	private void onNewPrivateMessage(PrivateMessageHeader h) {
+		runOnUiThreadUnlessDestroyed(() -> {
+			if (h instanceof PrivateRequest || h instanceof PrivateResponse) {
+				String cName = contactName.getValue();
+				if (cName == null) {
+					// Wait for the contact name to be loaded
+					contactName.observe(this, new Observer<String>() {
+						@Override
+						public void onChanged(@Nullable String cName) {
+							if (cName != null) {
+								addConversationItem(h.accept(visitor));
+								contactName.removeObserver(this);
+							}
+						}
+					});
+				} else {
+					addConversationItem(h.accept(visitor));
+				}
+			} else {
+				addConversationItem(h.accept(visitor));
+				loadMessageBody(h.getId());
 			}
 		});
 	}
 
-	private void handleIntroductionResponse(IntroductionResponse m) {
-		getContactNameTask().addListener(new FutureTaskListener<String>() {
-			@Override
-			public void onSuccess(String contactName) {
-				runOnUiThreadUnlessDestroyed(() -> {
-					ConversationItem item = ConversationItem
-							.from(ConversationActivity.this, contactName, m);
-					addConversationItem(item);
-				});
-			}
-
-			@Override
-			public void onFailure(Throwable exception) {
-				runOnUiThreadUnlessDestroyed(
-						() -> handleDbException((DbException) exception));
-			}
-		});
-	}
-
-	private void handleInvitationRequest(InvitationRequest m) {
-		getContactNameTask().addListener(new FutureTaskListener<String>() {
-			@Override
-			public void onSuccess(String contactName) {
-				runOnUiThreadUnlessDestroyed(() -> {
-					ConversationItem item = ConversationItem
-							.from(ConversationActivity.this, contactName, m);
-					addConversationItem(item);
-				});
-			}
-
-			@Override
-			public void onFailure(Throwable exception) {
-				runOnUiThreadUnlessDestroyed(
-						() -> handleDbException((DbException) exception));
-			}
-		});
-	}
-
-	private void handleInvitationResponse(InvitationResponse m) {
-		getContactNameTask().addListener(new FutureTaskListener<String>() {
-			@Override
-			public void onSuccess(String contactName) {
-				runOnUiThreadUnlessDestroyed(() -> {
-					ConversationItem item = ConversationItem
-							.from(ConversationActivity.this, contactName, m);
-					addConversationItem(item);
-				});
-			}
-
-			@Override
-			public void onFailure(Throwable exception) {
-				runOnUiThreadUnlessDestroyed(
-						() -> handleDbException((DbException) exception));
-			}
-		});
-	}
-
-	private void markMessages(Collection<MessageId> messageIds,
-			boolean sent, boolean seen) {
+	private void markMessages(Collection<MessageId> messageIds, boolean sent,
+			boolean seen) {
 		runOnUiThreadUnlessDestroyed(() -> {
 			adapter.incrementRevision();
 			Set<MessageId> messages = new HashSet<>(messageIds);
@@ -678,7 +529,8 @@ public class ConversationActivity extends BriarActivity
 				//noinspection ConstantConditions init in loadGroupId()
 				storeMessage(privateMessageFactory.createPrivateMessage(
 						messagingGroupId, timestamp, body), body);
-			} catch (FormatException e) {throw new RuntimeException(e);
+			} catch (FormatException e) {
+				throw new RuntimeException(e);
 			}
 		});
 	}
@@ -693,10 +545,8 @@ public class ConversationActivity extends BriarActivity
 				PrivateMessageHeader h = new PrivateMessageHeader(
 						message.getId(), message.getGroupId(),
 						message.getTimestamp(), true, false, false, false);
-				ConversationItem item = ConversationItem.from(h);
-				item.setBody(body);
 				bodyCache.put(message.getId(), body);
-				addConversationItem(item);
+				addConversationItem(h.accept(visitor));
 			} catch (DbException e) {
 				logException(LOG, WARNING, e);
 			}
@@ -823,7 +673,7 @@ public class ConversationActivity extends BriarActivity
 	@UiThread
 	@Override
 	public void respondToRequest(ConversationRequestItem item, boolean accept) {
-		item.setAnswered(true);
+		item.setAnswered();
 		int position = adapter.findItemPosition(item);
 		if (position != INVALID_POSITION) {
 			adapter.notifyItemChanged(position, item);
@@ -909,10 +759,11 @@ public class ConversationActivity extends BriarActivity
 		groupInvitationManager.respondToInvitation(contactId, id, accept);
 	}
 
-	private ListenableFutureTask<String> getContactNameTask() {
-		if (!contactNameTaskStarted.getAndSet(true))
-			runOnDbThread(contactNameTask);
-		return contactNameTask;
+	@Nullable
+	@Override
+	public String getBody(MessageId m) {
+		String body = bodyCache.get(m);
+		if (body == null) loadMessageBody(m);
+		return body;
 	}
-
 }

briar-android/src/main/java/org/briarproject/briar/android/contact/ConversationItem.java

@@ -1,40 +1,20 @@
 package org.briarproject.briar.android.contact;
 
-import android.content.Context;
 import android.support.annotation.LayoutRes;
-import android.support.annotation.StringRes;
 
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.sync.GroupId;
 import org.briarproject.bramble.api.sync.MessageId;
-import org.briarproject.briar.R;
-import org.briarproject.briar.android.contact.ConversationRequestItem.RequestType;
-import org.briarproject.briar.api.blog.BlogInvitationRequest;
-import org.briarproject.briar.api.blog.BlogInvitationResponse;
-import org.briarproject.briar.api.client.BaseMessageHeader;
-import org.briarproject.briar.api.forum.ForumInvitationRequest;
-import org.briarproject.briar.api.forum.ForumInvitationResponse;
-import org.briarproject.briar.api.introduction.IntroductionRequest;
-import org.briarproject.briar.api.introduction.IntroductionResponse;
-import org.briarproject.briar.api.messaging.PrivateMessageHeader;
-import org.briarproject.briar.api.privategroup.invitation.GroupInvitationRequest;
-import org.briarproject.briar.api.privategroup.invitation.GroupInvitationResponse;
-import org.briarproject.briar.api.sharing.InvitationRequest;
-import org.briarproject.briar.api.sharing.InvitationResponse;
 
 import javax.annotation.Nullable;
 import javax.annotation.concurrent.NotThreadSafe;
 
-import static org.briarproject.briar.android.contact.ConversationRequestItem.RequestType.BLOG;
-import static org.briarproject.briar.android.contact.ConversationRequestItem.RequestType.FORUM;
-import static org.briarproject.briar.android.contact.ConversationRequestItem.RequestType.GROUP;
-import static org.briarproject.briar.android.contact.ConversationRequestItem.RequestType.INTRODUCTION;
-
 @NotThreadSafe
 @NotNullByDefault
 abstract class ConversationItem {
 
-	protected @Nullable String body;
+	@Nullable
+	protected String body;
 	private final MessageId id;
 	private final GroupId groupId;
 	private final long time;
@@ -78,216 +58,4 @@ abstract class ConversationItem {
 
 	@LayoutRes
 	abstract public int getLayout();
-
-	static ConversationItem from(PrivateMessageHeader h) {
-		if (h.isLocal()) {
-			return new ConversationMessageOutItem(h);
-		} else {
-			return new ConversationMessageInItem(h);
-		}
-	}
-
-	static ConversationItem from(Context ctx, String contactName,
-			IntroductionRequest ir) {
-		if (ir.isLocal()) {
-			String text = ctx.getString(R.string.introduction_request_sent,
-					contactName, ir.getName());
-			return new ConversationNoticeOutItem(ir.getMessageId(),
-					ir.getGroupId(), text, ir.getMessage(), ir.getTimestamp(),
-					ir.isSent(), ir.isSeen());
-		} else {
-			String text;
-			if (ir.wasAnswered()) {
-				text = ctx.getString(
-						R.string.introduction_request_answered_received,
-						contactName, ir.getName());
-			} else if (ir.contactExists()){
-				text = ctx.getString(
-						R.string.introduction_request_exists_received,
-						contactName, ir.getName());
-			} else {
-				text = ctx.getString(R.string.introduction_request_received,
-						contactName, ir.getName());
-			}
-			return new ConversationRequestItem(ir.getMessageId(),
-					ir.getGroupId(), INTRODUCTION, ir.getSessionId(), text,
-					ir.getMessage(), ir.getTimestamp(), ir.isRead(), null,
-					ir.wasAnswered(), false);
-		}
-	}
-
-	static ConversationItem from(Context ctx, String contactName,
-			IntroductionResponse ir) {
-		if (ir.isLocal()) {
-			String text;
-			if (ir.wasAccepted()) {
-				text = ctx.getString(
-						R.string.introduction_response_accepted_sent,
-						ir.getName());
-				text += "\n\n" + ctx.getString(
-						R.string.introduction_response_accepted_sent_info,
-						ir.getName());
-			} else {
-				text = ctx.getString(
-						R.string.introduction_response_declined_sent,
-						ir.getName());
-			}
-			return new ConversationNoticeOutItem(ir.getMessageId(),
-					ir.getGroupId(), text, null, ir.getTimestamp(), ir.isSent(),
-					ir.isSeen());
-		} else {
-			String text;
-			if (ir.wasAccepted()) {
-				text = ctx.getString(
-						R.string.introduction_response_accepted_received,
-						contactName, ir.getName());
-			} else {
-				if (ir.isIntroducer()) {
-					text = ctx.getString(
-							R.string.introduction_response_declined_received,
-							contactName, ir.getName());
-				} else {
-					text = ctx.getString(
-							R.string.introduction_response_declined_received_by_introducee,
-							contactName, ir.getName());
-				}
-			}
-			return new ConversationNoticeInItem(ir.getMessageId(),
-					ir.getGroupId(), text, null, ir.getTimestamp(),
-					ir.isRead());
-		}
-	}
-
-	static ConversationItem from(Context ctx, String contactName,
-			InvitationRequest ir) {
-		if (ir.isLocal()) {
-			String text;
-			if (ir instanceof ForumInvitationRequest) {
-				text = ctx.getString(R.string.forum_invitation_sent,
-						((ForumInvitationRequest) ir).getForumName(),
-						contactName);
-			} else if (ir instanceof BlogInvitationRequest) {
-				text = ctx.getString(R.string.blogs_sharing_invitation_sent,
-						((BlogInvitationRequest) ir).getBlogAuthorName(),
-						contactName);
-			} else if (ir instanceof GroupInvitationRequest) {
-				text = ctx.getString(
-						R.string.groups_invitations_invitation_sent,
-						contactName, ir.getShareable().getName());
-			} else {
-				throw new IllegalArgumentException("Unknown InvitationRequest");
-			}
-			return new ConversationNoticeOutItem(ir.getId(), ir.getGroupId(),
-					text, ir.getMessage(), ir.getTimestamp(), ir.isSent(),
-					ir.isSeen());
-		} else {
-			String text;
-			RequestType type;
-			if (ir instanceof ForumInvitationRequest) {
-				text = ctx.getString(R.string.forum_invitation_received,
-						contactName,
-						((ForumInvitationRequest) ir).getForumName());
-				type = FORUM;
-			} else if (ir instanceof BlogInvitationRequest) {
-				text = ctx.getString(R.string.blogs_sharing_invitation_received,
-						contactName,
-						((BlogInvitationRequest) ir).getBlogAuthorName());
-				type = BLOG;
-			} else if (ir instanceof GroupInvitationRequest) {
-				text = ctx.getString(
-						R.string.groups_invitations_invitation_received,
-						contactName, ir.getShareable().getName());
-				type = GROUP;
-			} else {
-				throw new IllegalArgumentException("Unknown InvitationRequest");
-			}
-			return new ConversationRequestItem(ir.getId(),
-					ir.getGroupId(), type, ir.getSessionId(), text,
-					ir.getMessage(), ir.getTimestamp(), ir.isRead(),
-					ir.getShareable().getId(), !ir.isAvailable(),
-					ir.canBeOpened());
-		}
-	}
-
-	static ConversationItem from(Context ctx, String contactName,
-			InvitationResponse ir) {
-		@StringRes int res;
-		if (ir.isLocal()) {
-			if (ir.wasAccepted()) {
-				if (ir instanceof ForumInvitationResponse) {
-					res = R.string.forum_invitation_response_accepted_sent;
-				} else if (ir instanceof BlogInvitationResponse) {
-					res = R.string.blogs_sharing_response_accepted_sent;
-				} else if (ir instanceof GroupInvitationResponse) {
-					res = R.string.groups_invitations_response_accepted_sent;
-				} else {
-					throw new IllegalArgumentException(
-							"Unknown InvitationResponse");
-				}
-			} else {
-				if (ir instanceof ForumInvitationResponse) {
-					res = R.string.forum_invitation_response_declined_sent;
-				} else if (ir instanceof BlogInvitationResponse) {
-					res = R.string.blogs_sharing_response_declined_sent;
-				} else if (ir instanceof GroupInvitationResponse) {
-					res = R.string.groups_invitations_response_declined_sent;
-				} else {
-					throw new IllegalArgumentException(
-							"Unknown InvitationResponse");
-				}
-			}
-			String text = ctx.getString(res, contactName);
-			return new ConversationNoticeOutItem(ir.getId(), ir.getGroupId(),
-					text, null, ir.getTimestamp(), ir.isSent(), ir.isSeen());
-		} else {
-			if (ir.wasAccepted()) {
-				if (ir instanceof ForumInvitationResponse) {
-					res = R.string.forum_invitation_response_accepted_received;
-				} else if (ir instanceof BlogInvitationResponse) {
-					res = R.string.blogs_sharing_response_accepted_received;
-				} else if (ir instanceof GroupInvitationResponse) {
-					res = R.string.groups_invitations_response_accepted_received;
-				} else {
-					throw new IllegalArgumentException(
-							"Unknown InvitationResponse");
-				}
-			} else {
-					if (ir instanceof ForumInvitationResponse) {
-						res = R.string.forum_invitation_response_declined_received;
-					} else if (ir instanceof BlogInvitationResponse) {
-						res = R.string.blogs_sharing_response_declined_received;
-					} else if (ir instanceof GroupInvitationResponse) {
-						res = R.string.groups_invitations_response_declined_received;
-					} else {
-						throw new IllegalArgumentException(
-								"Unknown InvitationResponse");
-					}
-			}
-			String text = ctx.getString(res, contactName);
-			return new ConversationNoticeInItem(ir.getId(), ir.getGroupId(),
-					text, null, ir.getTimestamp(), ir.isRead());
-		}
-	}
-
-	/**
-	 * This method should not be used to display the resulting ConversationItem
-	 * in the UI, but only to update list information based on the
-	 * BaseMessageHeader.
-	 **/
-	static ConversationItem from(Context ctx, BaseMessageHeader h) {
-		if (h instanceof PrivateMessageHeader) {
-			return from((PrivateMessageHeader) h);
-		} else if(h instanceof IntroductionRequest) {
-			return from(ctx, "", (IntroductionRequest) h);
-		} else if(h instanceof IntroductionResponse) {
-			return from(ctx, "", (IntroductionResponse) h);
-		} else if(h instanceof InvitationRequest) {
-			return from(ctx, "", (InvitationRequest) h);
-		} else if(h instanceof InvitationResponse) {
-			return from(ctx, "", (InvitationResponse) h);
-		} else {
-			throw new IllegalArgumentException("Unknown message header");
-		}
-	}
-
 }

briar-android/src/main/java/org/briarproject/briar/android/contact/ConversationNoticeInItem.java

@@ -6,6 +6,7 @@ import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.sync.GroupId;
 import org.briarproject.bramble.api.sync.MessageId;
 import org.briarproject.briar.R;
+import org.briarproject.briar.api.messaging.PrivateResponse;
 
 import javax.annotation.Nullable;
 import javax.annotation.concurrent.NotThreadSafe;
@@ -17,13 +18,17 @@ class ConversationNoticeInItem extends ConversationItem {
 	@Nullable
 	private final String msgText;
 
-	ConversationNoticeInItem(MessageId id, GroupId groupId,
-			String text, @Nullable String msgText, long time,
-			boolean read) {
+	ConversationNoticeInItem(MessageId id, GroupId groupId, String text,
+			@Nullable String msgText, long time, boolean read) {
 		super(id, groupId, text, time, read);
 		this.msgText = msgText;
 	}
 
+	ConversationNoticeInItem(String text, PrivateResponse r) {
+		super(r.getId(), r.getGroupId(), text, r.getTimestamp(), r.isRead());
+		this.msgText = null;
+	}
+
 	@Nullable
 	String getMsgText() {
 		return msgText;
@@ -39,5 +44,4 @@ class ConversationNoticeInItem extends ConversationItem {
 	public int getLayout() {
 		return R.layout.list_item_conversation_notice_in;
 	}
-
 }

briar-android/src/main/java/org/briarproject/briar/android/contact/ConversationNoticeOutItem.java

@@ -3,9 +3,9 @@ package org.briarproject.briar.android.contact;
 import android.support.annotation.LayoutRes;
 
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.api.sync.GroupId;
-import org.briarproject.bramble.api.sync.MessageId;
 import org.briarproject.briar.R;
+import org.briarproject.briar.api.messaging.PrivateRequest;
+import org.briarproject.briar.api.messaging.PrivateResponse;
 
 import javax.annotation.Nullable;
 import javax.annotation.concurrent.NotThreadSafe;
@@ -17,11 +17,16 @@ class ConversationNoticeOutItem extends ConversationOutItem {
 	@Nullable
 	private final String msgText;
 
-	ConversationNoticeOutItem(MessageId id, GroupId groupId,
-			String text, @Nullable String msgText, long time,
-			boolean sent, boolean seen) {
-		super(id, groupId, text, time, sent, seen);
-		this.msgText = msgText;
+	ConversationNoticeOutItem(String text, PrivateRequest r) {
+		super(r.getId(), r.getGroupId(), text, r.getTimestamp(), r.isSent(),
+				r.isSeen());
+		this.msgText = r.getMessage();
+	}
+
+	ConversationNoticeOutItem(String text, PrivateResponse r) {
+		super(r.getId(), r.getGroupId(), text, r.getTimestamp(), r.isSent(),
+				r.isSeen());
+		this.msgText = null;
 	}
 
 	@Nullable
@@ -34,5 +39,4 @@ class ConversationNoticeOutItem extends ConversationOutItem {
 	public int getLayout() {
 		return R.layout.list_item_conversation_notice_out;
 	}
-
 }

briar-android/src/main/java/org/briarproject/briar/android/contact/ConversationRequestItem.java

@@ -4,9 +4,11 @@ import android.support.annotation.LayoutRes;
 
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.sync.GroupId;
-import org.briarproject.bramble.api.sync.MessageId;
 import org.briarproject.briar.R;
 import org.briarproject.briar.api.client.SessionId;
+import org.briarproject.briar.api.messaging.PrivateRequest;
+import org.briarproject.briar.api.sharing.InvitationRequest;
+import org.briarproject.briar.api.sharing.Shareable;
 
 import javax.annotation.Nullable;
 import javax.annotation.concurrent.NotThreadSafe;
@@ -15,7 +17,7 @@ import javax.annotation.concurrent.NotThreadSafe;
 @NotNullByDefault
 class ConversationRequestItem extends ConversationNoticeInItem {
 
-	enum RequestType { INTRODUCTION, FORUM, BLOG, GROUP }
+	enum RequestType {INTRODUCTION, FORUM, BLOG, GROUP}
 
 	@Nullable
 	private final GroupId requestedGroupId;
@@ -24,17 +26,19 @@ class ConversationRequestItem extends ConversationNoticeInItem {
 	private final boolean canBeOpened;
 	private boolean answered;
 
-	ConversationRequestItem(MessageId id, GroupId groupId,
-			RequestType requestType, SessionId sessionId, String text,
-			@Nullable String msgText, long time, boolean read,
-			@Nullable GroupId requestedGroupId, boolean answered,
-			boolean canBeOpened) {
-		super(id, groupId, text, msgText, time, read);
-		this.requestType = requestType;
-		this.sessionId = sessionId;
-		this.requestedGroupId = requestedGroupId;
-		this.answered = answered;
-		this.canBeOpened = canBeOpened;
+	ConversationRequestItem(String text, RequestType type, PrivateRequest r) {
+		super(r.getId(), r.getGroupId(), text, r.getMessage(),
+				r.getTimestamp(), r.isRead());
+		this.requestType = type;
+		this.sessionId = r.getSessionId();
+		this.answered = r.wasAnswered();
+		if (r instanceof InvitationRequest) {
+			this.requestedGroupId = ((Shareable) r.getNameable()).getId();
+			this.canBeOpened = ((InvitationRequest) r).canBeOpened();
+		} else {
+			this.requestedGroupId = null;
+			this.canBeOpened = false;
+		}
 	}
 
 	RequestType getRequestType() {
@@ -54,8 +58,8 @@ class ConversationRequestItem extends ConversationNoticeInItem {
 		return answered;
 	}
 
-	void setAnswered(boolean answered) {
-		this.answered = answered;
+	void setAnswered() {
+		this.answered = true;
 	}
 
 	public boolean canBeOpened() {
@@ -67,5 +71,4 @@ class ConversationRequestItem extends ConversationNoticeInItem {
 	public int getLayout() {
 		return R.layout.list_item_conversation_request;
 	}
-
 }

briar-android/src/main/java/org/briarproject/briar/android/contact/ConversationVisitor.java

@@ -0,0 +1,246 @@
+package org.briarproject.briar.android.contact;
+
+import android.arch.lifecycle.LiveData;
+import android.content.Context;
+import android.support.annotation.UiThread;
+
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.sync.MessageId;
+import org.briarproject.briar.R;
+import org.briarproject.briar.api.blog.BlogInvitationRequest;
+import org.briarproject.briar.api.blog.BlogInvitationResponse;
+import org.briarproject.briar.api.forum.ForumInvitationRequest;
+import org.briarproject.briar.api.forum.ForumInvitationResponse;
+import org.briarproject.briar.api.introduction.IntroductionRequest;
+import org.briarproject.briar.api.introduction.IntroductionResponse;
+import org.briarproject.briar.api.messaging.PrivateMessageHeader;
+import org.briarproject.briar.api.messaging.PrivateMessageVisitor;
+import org.briarproject.briar.api.privategroup.invitation.GroupInvitationRequest;
+import org.briarproject.briar.api.privategroup.invitation.GroupInvitationResponse;
+
+import javax.annotation.Nullable;
+
+import static org.briarproject.briar.android.contact.ConversationRequestItem.RequestType.BLOG;
+import static org.briarproject.briar.android.contact.ConversationRequestItem.RequestType.FORUM;
+import static org.briarproject.briar.android.contact.ConversationRequestItem.RequestType.GROUP;
+import static org.briarproject.briar.android.contact.ConversationRequestItem.RequestType.INTRODUCTION;
+
+@UiThread
+@NotNullByDefault
+class ConversationVisitor implements PrivateMessageVisitor<ConversationItem> {
+
+	private final Context ctx;
+	private final BodyCache bodyCache;
+	private final LiveData<String> contactName;
+
+	ConversationVisitor(Context ctx, BodyCache bodyCache,
+			LiveData<String> contactName) {
+		this.ctx = ctx;
+		this.bodyCache = bodyCache;
+		this.contactName = contactName;
+	}
+
+	@Override
+	public ConversationItem visitPrivateMessageHeader(PrivateMessageHeader h) {
+		ConversationItem item;
+		if (h.isLocal()) item = new ConversationMessageOutItem(h);
+		else item = new ConversationMessageInItem(h);
+		String body = bodyCache.getBody(h.getId());
+		if (body != null) item.setBody(body);
+		return item;
+	}
+
+	@Override
+	public ConversationItem visitBlogInvitationRequest(
+			BlogInvitationRequest r) {
+		if (r.isLocal()) {
+			String text = ctx.getString(R.string.blogs_sharing_invitation_sent,
+					r.getName(), contactName.getValue());
+			return new ConversationNoticeOutItem(text, r);
+		} else {
+			String text = ctx.getString(
+					R.string.blogs_sharing_invitation_received,
+					contactName.getValue(), r.getName());
+			return new ConversationRequestItem(text, BLOG, r);
+		}
+	}
+
+	@Override
+	public ConversationItem visitBlogInvitationResponse(
+			BlogInvitationResponse r) {
+		if (r.isLocal()) {
+			String text;
+			if (r.wasAccepted()) {
+				text = ctx.getString(
+						R.string.blogs_sharing_response_accepted_sent,
+						contactName.getValue());
+			} else {
+				text = ctx.getString(
+						R.string.blogs_sharing_response_declined_sent,
+						contactName.getValue());
+			}
+			return new ConversationNoticeOutItem(text, r);
+		} else {
+			String text;
+			if (r.wasAccepted()) {
+				text = ctx.getString(
+						R.string.blogs_sharing_response_accepted_received,
+						contactName.getValue());
+			} else {
+				text = ctx.getString(
+						R.string.blogs_sharing_response_declined_received,
+						contactName.getValue());
+			}
+			return new ConversationNoticeInItem(text, r);
+		}
+	}
+
+	@Override
+	public ConversationItem visitForumInvitationRequest(
+			ForumInvitationRequest r) {
+		if (r.isLocal()) {
+			String text = ctx.getString(R.string.forum_invitation_sent,
+					r.getName(), contactName.getValue());
+			return new ConversationNoticeOutItem(text, r);
+		} else {
+			String text = ctx.getString(
+					R.string.forum_invitation_received,
+					contactName.getValue(), r.getName());
+			return new ConversationRequestItem(text, FORUM, r);
+		}
+	}
+
+	@Override
+	public ConversationItem visitForumInvitationResponse(
+			ForumInvitationResponse r) {
+		if (r.isLocal()) {
+			String text;
+			if (r.wasAccepted()) {
+				text = ctx.getString(
+						R.string.forum_invitation_response_accepted_sent,
+						contactName.getValue());
+			} else {
+				text = ctx.getString(
+						R.string.forum_invitation_response_declined_sent,
+						contactName.getValue());
+			}
+			return new ConversationNoticeOutItem(text, r);
+		} else {
+			String text;
+			if (r.wasAccepted()) {
+				text = ctx.getString(
+						R.string.forum_invitation_response_accepted_received,
+						contactName.getValue());
+			} else {
+				text = ctx.getString(
+						R.string.forum_invitation_response_declined_received,
+						contactName.getValue());
+			}
+			return new ConversationNoticeInItem(text, r);
+		}
+	}
+
+	@Override
+	public ConversationItem visitGroupInvitationRequest(
+			GroupInvitationRequest r) {
+		if (r.isLocal()) {
+			String text = ctx.getString(
+					R.string.groups_invitations_invitation_sent,
+					contactName.getValue(), r.getName());
+			return new ConversationNoticeOutItem(text, r);
+		} else {
+			String text = ctx.getString(
+					R.string.groups_invitations_invitation_received,
+					contactName.getValue(), r.getName());
+			return new ConversationRequestItem(text, GROUP, r);
+		}
+	}
+
+	@Override
+	public ConversationItem visitGroupInvitationResponse(
+			GroupInvitationResponse r) {
+		if (r.isLocal()) {
+			String text;
+			if (r.wasAccepted()) {
+				text = ctx.getString(
+						R.string.groups_invitations_response_accepted_sent,
+						contactName.getValue());
+			} else {
+				text = ctx.getString(
+						R.string.groups_invitations_response_declined_sent,
+						contactName.getValue());
+			}
+			return new ConversationNoticeOutItem(text, r);
+		} else {
+			String text;
+			if (r.wasAccepted()) {
+				text = ctx.getString(
+						R.string.groups_invitations_response_accepted_received,
+						contactName.getValue());
+			} else {
+				text = ctx.getString(
+						R.string.groups_invitations_response_declined_received,
+						contactName.getValue());
+			}
+			return new ConversationNoticeInItem(text, r);
+		}
+	}
+
+	@Override
+	public ConversationItem visitIntroductionRequest(IntroductionRequest r) {
+		if (r.isLocal()) {
+			String text = ctx.getString(R.string.introduction_request_sent,
+					contactName.getValue(), r.getName());
+			return new ConversationNoticeOutItem(text, r);
+		} else {
+			String text = ctx.getString(R.string.introduction_request_received,
+					contactName.getValue(), r.getName());
+			return new ConversationRequestItem(text, INTRODUCTION, r);
+		}
+	}
+
+	@Override
+	public ConversationItem visitIntroductionResponse(IntroductionResponse r) {
+		if (r.isLocal()) {
+			String text;
+			if (r.wasAccepted()) {
+				String introducee = r.getIntroducedAuthor().getName();
+				text = ctx.getString(
+						R.string.introduction_response_accepted_sent,
+						introducee)
+						+ "\n\n" + ctx.getString(
+						R.string.introduction_response_accepted_sent_info,
+						introducee);
+			} else {
+				text = ctx.getString(
+						R.string.introduction_response_declined_sent,
+						r.getIntroducedAuthor().getName());
+			}
+			return new ConversationNoticeOutItem(text, r);
+		} else {
+			String text;
+			if (r.wasAccepted()) {
+				text = ctx.getString(
+						R.string.introduction_response_accepted_received,
+						contactName.getValue(),
+						r.getIntroducedAuthor().getName());
+			} else if (r.isIntroducer()) {
+				text = ctx.getString(
+						R.string.introduction_response_declined_received,
+						contactName.getValue(),
+						r.getIntroducedAuthor().getName());
+			} else {
+				text = ctx.getString(
+						R.string.introduction_response_declined_received_by_introducee,
+						contactName.getValue(),
+						r.getIntroducedAuthor().getName());
+			}
+			return new ConversationNoticeInItem(text, r);
+		}
+	}
+
+	interface BodyCache {
+		@Nullable
+		String getBody(MessageId m);
+	}
+}

briar-android/src/main/java/org/briarproject/briar/android/forum/ForumControllerImpl.java

@@ -84,11 +84,10 @@ class ForumControllerImpl extends
 		} else if (e instanceof ForumInvitationResponseReceivedEvent) {
 			ForumInvitationResponseReceivedEvent f =
 					(ForumInvitationResponseReceivedEvent) e;
-			ForumInvitationResponse r =
-					(ForumInvitationResponse) f.getResponse();
+			ForumInvitationResponse r = f.getMessageHeader();
 			if (r.getShareableId().equals(getGroupId()) && r.wasAccepted()) {
 				LOG.info("Forum invitation was accepted");
-				onForumInvitationAccepted(r.getContactId());
+				onForumInvitationAccepted(f.getContactId());
 			}
 		} else if (e instanceof ContactLeftShareableEvent) {
 			ContactLeftShareableEvent c = (ContactLeftShareableEvent) e;

briar-android/src/main/java/org/briarproject/briar/android/introduction/IntroductionMessageFragment.java

@@ -2,6 +2,7 @@ package org.briarproject.briar.android.introduction;
 
 import android.content.Context;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 import android.support.v7.app.ActionBar;
 import android.view.LayoutInflater;
@@ -82,8 +83,8 @@ public class IntroductionMessageFragment extends BaseFragment
 	}
 
 	@Override
-	public View onCreateView(LayoutInflater inflater, ViewGroup container,
-			Bundle savedInstanceState) {
+	public View onCreateView(@NonNull LayoutInflater inflater,
+			ViewGroup container, Bundle savedInstanceState) {
 
 		// change toolbar text
 		ActionBar actionBar = introductionActivity.getSupportActionBar();
@@ -182,7 +183,7 @@ public class IntroductionMessageFragment extends BaseFragment
 	}
 
 	@Override
-	public void onSendClick(String text) {
+	public void onSendClick(@NonNull String text) {
 		// disable button to prevent accidental double invitations
 		ui.message.setSendButtonEnabled(false);
 

briar-android/src/main/java/org/briarproject/briar/android/keyagreement/KeyAgreementFragment.java

@@ -15,7 +15,6 @@ import android.widget.Toast;
 
 import com.google.zxing.Result;
 
-import org.briarproject.bramble.api.UnsupportedVersionException;
 import org.briarproject.bramble.api.event.Event;
 import org.briarproject.bramble.api.event.EventBus;
 import org.briarproject.bramble.api.keyagreement.KeyAgreementResult;
@@ -23,6 +22,7 @@ import org.briarproject.bramble.api.keyagreement.KeyAgreementTask;
 import org.briarproject.bramble.api.keyagreement.Payload;
 import org.briarproject.bramble.api.keyagreement.PayloadEncoder;
 import org.briarproject.bramble.api.keyagreement.PayloadParser;
+import org.briarproject.bramble.api.keyagreement.UnsupportedVersionException;
 import org.briarproject.bramble.api.keyagreement.event.KeyAgreementAbortedEvent;
 import org.briarproject.bramble.api.keyagreement.event.KeyAgreementFailedEvent;
 import org.briarproject.bramble.api.keyagreement.event.KeyAgreementFinishedEvent;
@@ -244,8 +244,14 @@ public class KeyAgreementFragment extends BaseEventFragment
 			task.connectAndRunProtocol(remotePayload);
 		} catch (UnsupportedVersionException e) {
 			reset();
-			String msg = getString(R.string.qr_code_unsupported,
-					getString(R.string.app_name));
+			String msg;
+			if (e.isTooOld()) {
+				msg = getString(R.string.qr_code_too_old,
+						getString(R.string.app_name));
+			} else {
+				msg = getString(R.string.qr_code_too_new,
+						getString(R.string.app_name));
+			}
 			showNextFragment(ContactExchangeErrorFragment.newInstance(msg));
 		} catch (CameraException e) {
 			logCameraExceptionAndFinish(e);

briar-android/src/main/java/org/briarproject/briar/android/login/StrengthMeter.java

@@ -7,6 +7,7 @@ import android.graphics.drawable.ClipDrawable;
 import android.graphics.drawable.Drawable;
 import android.graphics.drawable.LayerDrawable;
 import android.graphics.drawable.ShapeDrawable;
+import android.support.annotation.Nullable;
 import android.util.AttributeSet;
 import android.widget.ProgressBar;
 
@@ -15,6 +16,7 @@ import static android.graphics.Paint.Style.FILL;
 import static android.graphics.Paint.Style.STROKE;
 import static android.graphics.drawable.ClipDrawable.HORIZONTAL;
 import static android.view.Gravity.LEFT;
+import static android.view.Gravity.START;
 import static org.briarproject.bramble.api.crypto.PasswordStrengthEstimator.QUITE_STRONG;
 import static org.briarproject.bramble.api.crypto.PasswordStrengthEstimator.QUITE_WEAK;
 import static org.briarproject.bramble.api.crypto.PasswordStrengthEstimator.STRONG;
@@ -35,11 +37,11 @@ public class StrengthMeter extends ProgressBar {
 		this(context, null);
 	}
 
-	public StrengthMeter(Context context, AttributeSet attrs) {
+	public StrengthMeter(Context context, @Nullable AttributeSet attrs) {
 		super(context, attrs, android.R.attr.progressBarStyleHorizontal);
 		bar = new ShapeDrawable();
 		bar.getPaint().setColor(RED);
-		ClipDrawable clip = new ClipDrawable(bar, LEFT, HORIZONTAL);
+		ClipDrawable clip = new ClipDrawable(bar, LEFT & START, HORIZONTAL);
 		ShapeDrawable background = new ShapeDrawable();
 		Paint p = background.getPaint();
 		p.setStyle(FILL);
@@ -50,6 +52,7 @@ public class StrengthMeter extends ProgressBar {
 		Drawable[] layers = new Drawable[] { clip, background };
 		setProgressDrawable(new LayerDrawable(layers));
 		setIndeterminate(false);
+		if (isInEditMode()) setStrength(STRONG);
 	}
 
 	@Override

briar-android/src/main/java/org/briarproject/briar/android/panic/FDroidSignaturePin.java

@@ -0,0 +1,84 @@
+package org.briarproject.briar.android.panic;
+
+import info.guardianproject.trustedintents.ApkSignaturePin;
+
+// needs to be public, because TrustedIntents will instantiate
+public final class FDroidSignaturePin extends ApkSignaturePin {
+
+	public FDroidSignaturePin() {
+		this.fingerprints = new String[] {
+				"927f7e38b6acbecd84e02dace33efa9a7a2f0979750f28f585688ee38b3a4e28"};
+		this.certificates = new byte[][] {
+				{48, -126, 3, 95, 48, -126, 2, 71, -96, 3, 2, 1, 2, 2, 4, 28,
+						-30, 107, -102, 48, 13, 6, 9, 42, -122, 72, -122, -9,
+						13, 1, 1, 11, 5, 0, 48, 96, 49, 11, 48, 9, 6, 3, 85, 4,
+						6, 19, 2, 85, 75, 49, 12, 48, 10, 6, 3, 85, 4, 8, 19, 3,
+						79, 82, 71, 49, 12, 48, 10, 6, 3, 85, 4, 7, 19, 3, 79,
+						82, 71, 49, 19, 48, 17, 6, 3, 85, 4, 10, 19, 10, 102,
+						100, 114, 111, 105, 100, 46, 111, 114, 103, 49, 15, 48,
+						13, 6, 3, 85, 4, 11, 19, 6, 70, 68, 114, 111, 105, 100,
+						49, 15, 48, 13, 6, 3, 85, 4, 3, 19, 6, 70, 68, 114, 111,
+						105, 100, 48, 30, 23, 13, 49, 55, 49, 50, 48, 55, 49,
+						55, 51, 48, 52, 50, 90, 23, 13, 52, 53, 48, 52, 50, 52,
+						49, 55, 51, 48, 52, 50, 90, 48, 96, 49, 11, 48, 9, 6, 3,
+						85, 4, 6, 19, 2, 85, 75, 49, 12, 48, 10, 6, 3, 85, 4, 8,
+						19, 3, 79, 82, 71, 49, 12, 48, 10, 6, 3, 85, 4, 7, 19,
+						3, 79, 82, 71, 49, 19, 48, 17, 6, 3, 85, 4, 10, 19, 10,
+						102, 100, 114, 111, 105, 100, 46, 111, 114, 103, 49, 15,
+						48, 13, 6, 3, 85, 4, 11, 19, 6, 70, 68, 114, 111, 105,
+						100, 49, 15, 48, 13, 6, 3, 85, 4, 3, 19, 6, 70, 68, 114,
+						111, 105, 100, 48, -126, 1, 34, 48, 13, 6, 9, 42, -122,
+						72, -122, -9, 13, 1, 1, 1, 5, 0, 3, -126, 1, 15, 0, 48,
+						-126, 1, 10, 2, -126, 1, 1, 0, -107, -115, -106, 1, -26,
+						72, -105, -99, 62, 3, -55, 34, 99, -112, -68, -20, -115,
+						31, 34, 118, -50, 12, -32, -59, 74, -58, -37, -87, 21,
+						105, 36, -82, 13, -51, 66, 4, 55, -111, 13, -46, -7,
+						-69, -15, 36, 118, -7, 101, -86, 123, -83, -103, 110,
+						116, -54, 112, 46, 12, 96, -76, -48, -70, -33, -81, 52,
+						59, 73, 107, -126, -72, -25, 32, 93, 29, -20, 5, -41,
+						-27, 123, -9, 104, -31, -59, -1, -83, -93, 99, 85, -116,
+						-62, -55, 18, -63, 6, -51, -110, 33, 9, 7, -49, 102,
+						-20, -122, -124, -68, 93, -102, 31, 48, 86, 96, -99,
+						105, -52, 95, 12, 57, 99, 12, -24, 70, 40, -99, -20,
+						-21, -85, -70, -105, 95, 117, -31, 126, -126, -39, 46,
+						-62, 59, -23, -74, 108, -12, -56, -40, -96, 79, -37,
+						-82, 1, 99, -104, 48, -60, 92, 14, 109, 127, -22, 31,
+						115, -27, 108, 9, 92, 118, -45, 103, 117, 57, -50, -82,
+						114, -113, 68, -82, 87, 96, 111, 72, 65, -63, 12, 31,
+						-34, -31, -55, -101, 101, 101, 59, 73, -119, -122, 82,
+						28, 47, -108, -85, 59, 46, 89, -93, -1, 9, -11, -51, 63,
+						-44, 109, -76, -103, -26, -49, -80, 6, 52, -27, 73,
+						-104, 40, 2, -101, -124, 60, -52, -105, -70, -24, -62,
+						88, 38, 53, -99, -92, 31, 119, 26, 79, 60, -124, 25,
+						-115, -89, -115, -109, 0, 6, 122, -78, 116, 82, 3, 39,
+						-67, 45, -43, 17, -39, 2, 3, 1, 0, 1, -93, 33, 48, 31,
+						48, 29, 6, 3, 85, 29, 14, 4, 22, 4, 20, 63, 109, -42,
+						-109, 25, 22, 7, -37, -22, -41, -38, 58, -56, 2, -68,
+						-38, -22, 65, -28, -60, 48, 13, 6, 9, 42, -122, 72,
+						-122, -9, 13, 1, 1, 11, 5, 0, 3, -126, 1, 1, 0, 94, 17,
+						31, 36, 85, -11, 85, 44, 19, -80, -20, -92, -118, 93,
+						40, 45, 96, 31, -3, -37, -110, -96, 102, 81, 61, -74,
+						-125, -117, -112, 58, -47, 17, 78, -18, 111, -116, 26,
+						-91, 73, 100, 84, -99, 21, 87, 73, -106, 108, -51, -125,
+						-21, 119, -88, -78, 2, 82, -109, -64, -9, -86, -112,
+						-115, 66, -86, 46, 71, 107, -65, 96, -102, 47, 35, -45,
+						-126, 33, 34, 121, -25, -85, -121, -56, -42, 22, -1,
+						-95, -86, 81, 100, -70, 113, 104, -73, 22, -19, 79, -19,
+						52, 62, 42, 76, -112, 94, -34, 42, -57, -75, -90, -58,
+						118, 127, -106, -39, 108, -56, -79, 103, -33, 22, 3, 47,
+						103, -76, -81, 53, -22, -44, -26, -102, 63, -99, 39, 38,
+						-108, 75, 33, 10, 25, -110, -125, -115, 114, -69, 73,
+						-112, 36, 74, 77, -82, -44, 29, -123, -8, -117, 71,
+						-105, 15, -109, 51, 22, 4, 80, 1, 43, 118, 121, -113,
+						-70, 83, -56, 82, -110, 4, -63, 16, -57, 126, -70, 81,
+						73, 61, 2, -61, 24, -14, -10, 4, -21, 90, 24, 66, 41,
+						-57, -60, -113, -18, -54, -1, 103, -75, 32, -64, 67,
+						103, 109, -79, -12, -113, -27, 114, 89, 116, 115, -13,
+						-123, -70, 61, -41, -46, -118, 29, -105, -97, -75, 39,
+						-51, 60, 88, 125, 55, -46, -95, 52, 57, 52, -115, 80,
+						44, 109, 119, -116, -62, -77, -74, -88, 41, 57, -65,
+						-71, -115, -67, 23, 66, -21, 56, 51, -91, 109}};
+	}
+
+
+}

briar-android/src/main/java/org/briarproject/briar/android/panic/PanicPreferencesFragment.java

@@ -31,13 +31,12 @@ public class PanicPreferencesFragment extends PreferenceFragmentCompat
 	public static final String KEY_LOCK = "pref_key_lock";
 	public static final String KEY_PANIC_APP = "pref_key_panic_app";
 	public static final String KEY_PURGE = "pref_key_purge";
-	public static final String KEY_UNINSTALL = "pref_key_uninstall";
 
 	private static final Logger LOG =
 			Logger.getLogger(PanicPreferencesFragment.class.getName());
 
 	private PackageManager pm;
-	private SwitchPreference lockPref, purgePref, uninstallPref;
+	private SwitchPreference lockPref, purgePref;
 	private ListPreference panicAppPref;
 
 	@Override
@@ -49,7 +48,6 @@ public class PanicPreferencesFragment extends PreferenceFragmentCompat
 		lockPref = (SwitchPreference) findPreference(KEY_LOCK);
 		panicAppPref = (ListPreference) findPreference(KEY_PANIC_APP);
 		purgePref = (SwitchPreference) findPreference(KEY_PURGE);
-		uninstallPref = (SwitchPreference) findPreference(KEY_UNINSTALL);
 
 		// check for connect/disconnect intents from panic trigger apps
 		if (PanicResponder.checkForDisconnectIntent(getActivity())) {
@@ -97,16 +95,11 @@ public class PanicPreferencesFragment extends PreferenceFragmentCompat
 			showPanicApp(packageName);
 
 			if (packageName.equals(Panic.PACKAGE_NAME_NONE)) {
-				lockPref.setEnabled(false);
 				purgePref.setChecked(false);
 				purgePref.setEnabled(false);
-				uninstallPref.setChecked(false);
-				uninstallPref.setEnabled(false);
 				getActivity().setResult(Activity.RESULT_CANCELED);
 			} else {
-				lockPref.setEnabled(true);
 				purgePref.setEnabled(true);
-				uninstallPref.setEnabled(true);
 			}
 
 			return true;
@@ -145,27 +138,15 @@ public class PanicPreferencesFragment extends PreferenceFragmentCompat
 	@Override
 	public void onSharedPreferenceChanged(SharedPreferences sharedPreferences,
 			String key) {
-		if (key.equals(KEY_PURGE)) {
-			// enable locking if purging gets enabled
-			if (sharedPreferences.getBoolean(KEY_PURGE, false)) {
-				lockPref.setChecked(true);
-			}
-			// disable uninstall if purging gets disabled
-			else {
-				uninstallPref.setChecked(false);
-			}
-		}
-		// enable purging and locking if uninstall gets enabled
-		if (key.equals(KEY_UNINSTALL) &&
-				sharedPreferences.getBoolean(KEY_UNINSTALL, false)) {
+		// enable locking if purging gets enabled
+		if (key.equals(KEY_PURGE) &&
+				sharedPreferences.getBoolean(KEY_PURGE, false)) {
 			lockPref.setChecked(true);
-			purgePref.setChecked(true);
 		}
-		// disable purging and uninstalling if locking gets disabled
+		// disable purging if locking gets disabled
 		if (key.equals(KEY_LOCK) &&
 				!sharedPreferences.getBoolean(KEY_LOCK, true)) {
 			purgePref.setChecked(false);
-			uninstallPref.setChecked(false);
 		}
 	}
 
@@ -179,10 +160,8 @@ public class PanicPreferencesFragment extends PreferenceFragmentCompat
 			panicAppPref.setIcon(
 					android.R.drawable.ic_menu_close_clear_cancel);
 
-			// disable panic actions
-			lockPref.setEnabled(false);
+			// disable destructive panic actions
 			purgePref.setEnabled(false);
-			uninstallPref.setEnabled(false);
 		} else {
 			// display connected panic app
 			try {
@@ -192,10 +171,8 @@ public class PanicPreferencesFragment extends PreferenceFragmentCompat
 				panicAppPref.setIcon(
 						pm.getApplicationIcon(triggerPackageName));
 
-				// enable panic actions
-				lockPref.setEnabled(true);
+				// enable destructive panic actions
 				purgePref.setEnabled(true);
-				uninstallPref.setEnabled(true);
 			} catch (PackageManager.NameNotFoundException e) {
 				// revert back to no app, just to be safe
 				PanicResponder.setTriggerPackageName(getActivity(),

briar-android/src/main/java/org/briarproject/briar/android/panic/PanicResponderActivity.java

@@ -2,7 +2,6 @@ package org.briarproject.briar.android.panic;
 
 import android.content.Intent;
 import android.content.SharedPreferences;
-import android.net.Uri;
 import android.os.Build;
 import android.os.Bundle;
 import android.support.v7.preference.PreferenceManager;
@@ -11,7 +10,6 @@ import org.briarproject.bramble.api.account.AccountManager;
 import org.briarproject.bramble.api.system.AndroidExecutor;
 import org.briarproject.briar.android.activity.ActivityComponent;
 import org.briarproject.briar.android.activity.BriarActivity;
-import org.iilab.IilabEngineeringRSA2048Pin;
 
 import java.util.logging.Logger;
 
@@ -22,10 +20,8 @@ import info.guardianproject.panic.Panic;
 import info.guardianproject.panic.PanicResponder;
 import info.guardianproject.trustedintents.TrustedIntents;
 
-import static android.content.Intent.ACTION_DELETE;
 import static org.briarproject.briar.android.panic.PanicPreferencesFragment.KEY_LOCK;
 import static org.briarproject.briar.android.panic.PanicPreferencesFragment.KEY_PURGE;
-import static org.briarproject.briar.android.panic.PanicPreferencesFragment.KEY_UNINSTALL;
 
 public class PanicResponderActivity extends BriarActivity {
 
@@ -44,8 +40,8 @@ public class PanicResponderActivity extends BriarActivity {
 		TrustedIntents trustedIntents = TrustedIntents.get(this);
 		// Guardian Project Ripple
 		trustedIntents.addTrustedSigner(GuardianProjectRSA4096.class);
-		// Amnesty International's Panic Button, made by iilab.org
-		trustedIntents.addTrustedSigner(IilabEngineeringRSA2048Pin.class);
+		// F-Droid
+		trustedIntents.addTrustedSigner(FDroidSignaturePin.class);
 
 		Intent intent = trustedIntents.getIntentFromTrustedSender(this);
 		if (intent != null) {
@@ -60,23 +56,16 @@ public class PanicResponderActivity extends BriarActivity {
 					LOG.info("Panic Trigger came from connected app");
 
 					// Performing panic responses
-					if (sharedPref.getBoolean(KEY_UNINSTALL, false)) {
+					if (sharedPref.getBoolean(KEY_PURGE, false)) {
 						LOG.info("Purging all data...");
 						deleteAllData();
-
-						LOG.info("Uninstalling...");
-						Intent uninstall = new Intent(ACTION_DELETE);
-						uninstall.setData(
-								Uri.parse("package:" + getPackageName()));
-						startActivity(uninstall);
-					} else if (sharedPref.getBoolean(KEY_PURGE, false)) {
-						LOG.info("Purging all data...");
-						deleteAllData();
-					} else if (sharedPref.getBoolean(KEY_LOCK, true)) {
-						LOG.info("Signing out...");
-						signOut(true);
 					}
 				}
+				// non-destructive actions are allowed by non-connected trusted apps
+				if (sharedPref.getBoolean(KEY_LOCK, true)) {
+					LOG.info("Signing out...");
+					signOut(true);
+				}
 			}
 		}
 

briar-android/src/main/java/org/briarproject/briar/android/privategroup/conversation/GroupControllerImpl.java

@@ -99,11 +99,10 @@ class GroupControllerImpl extends
 		} else if (e instanceof GroupInvitationResponseReceivedEvent) {
 			GroupInvitationResponseReceivedEvent g =
 					(GroupInvitationResponseReceivedEvent) e;
-			GroupInvitationResponse r =
-					(GroupInvitationResponse) g.getResponse();
+			GroupInvitationResponse r = g.getMessageHeader();
 			if (getGroupId().equals(r.getShareableId()) && r.wasAccepted()) {
 				listener.runOnUiThreadUnlessDestroyed(
-						() -> listener.onInvitationAccepted(r.getContactId()));
+						() -> listener.onInvitationAccepted(g.getContactId()));
 			}
 		} else if (e instanceof GroupDissolvedEvent) {
 			GroupDissolvedEvent g = (GroupDissolvedEvent) e;

briar-android/src/main/java/org/briarproject/briar/android/reporting/DevReportActivity.java

@@ -292,8 +292,7 @@ public class DevReportActivity extends BaseCrashReportDialog
 						cb.setChecked(required || !excluded);
 						cb.setEnabled(!required);
 						cb.setOnCheckedChangeListener(DevReportActivity.this);
-						TextView title = v.findViewById(R.id.title);
-						title.setText(field.toString());
+						cb.setText(field.toString());
 						TextView content = v.findViewById(R.id.content);
 						content.setText(value);
 						report.addView(v);

briar-android/src/main/java/org/briarproject/briar/android/settings/SettingsFragment.java

@@ -89,7 +89,6 @@ import static org.briarproject.briar.api.android.AndroidNotificationManager.GROU
 import static org.briarproject.briar.api.android.AndroidNotificationManager.PREF_NOTIFY_BLOG;
 import static org.briarproject.briar.api.android.AndroidNotificationManager.PREF_NOTIFY_FORUM;
 import static org.briarproject.briar.api.android.AndroidNotificationManager.PREF_NOTIFY_GROUP;
-import static org.briarproject.briar.api.android.AndroidNotificationManager.PREF_NOTIFY_LOCK_SCREEN;
 import static org.briarproject.briar.api.android.AndroidNotificationManager.PREF_NOTIFY_PRIVATE;
 import static org.briarproject.briar.api.android.AndroidNotificationManager.PREF_NOTIFY_RINGTONE_NAME;
 import static org.briarproject.briar.api.android.AndroidNotificationManager.PREF_NOTIFY_RINGTONE_URI;
@@ -127,7 +126,6 @@ public class SettingsFragment extends PreferenceFragmentCompat
 	private SwitchPreference notifyForumPosts;
 	private SwitchPreference notifyBlogPosts;
 	private SwitchPreference notifyVibration;
-	private SwitchPreference notifyLockscreen;
 
 	private Preference notifySound;
 
@@ -179,8 +177,6 @@ public class SettingsFragment extends PreferenceFragmentCompat
 				"pref_key_notify_blog_posts");
 		notifyVibration = (SwitchPreference) findPreference(
 				"pref_key_notify_vibration");
-		notifyLockscreen = (SwitchPreference) findPreference(
-				"pref_key_notify_lock_screen");
 		notifySound = findPreference("pref_key_notify_sound");
 
 		language.setOnPreferenceChangeListener(this);
@@ -207,10 +203,6 @@ public class SettingsFragment extends PreferenceFragmentCompat
 		torMobile.setOnPreferenceChangeListener(this);
 		screenLock.setOnPreferenceChangeListener(this);
 		screenLockTimeout.setOnPreferenceChangeListener(this);
-		if (SDK_INT >= 21) {
-			notifyLockscreen.setVisible(true);
-			notifyLockscreen.setOnPreferenceChangeListener(this);
-		}
 
 		findPreference("pref_key_send_feedback").setOnPreferenceClickListener(
 				preference -> {
@@ -380,8 +372,6 @@ public class SettingsFragment extends PreferenceFragmentCompat
 				notifyForumPosts.setOnPreferenceChangeListener(this);
 				notifyBlogPosts.setOnPreferenceChangeListener(this);
 				notifyVibration.setOnPreferenceChangeListener(this);
-				notifyLockscreen.setChecked(settings.getBoolean(
-						PREF_NOTIFY_LOCK_SCREEN, false));
 				notifySound.setOnPreferenceClickListener(
 						pref -> onNotificationSoundClicked());
 				String text;
@@ -409,7 +399,6 @@ public class SettingsFragment extends PreferenceFragmentCompat
 				setupNotificationPreference(notifyBlogPosts, BLOG_CHANNEL_ID,
 						R.string.notify_blog_posts_setting_summary_26);
 				notifyVibration.setVisible(false);
-				notifyLockscreen.setVisible(false);
 				notifySound.setVisible(false);
 			}
 			setSettingsEnabled(true);
@@ -432,7 +421,6 @@ public class SettingsFragment extends PreferenceFragmentCompat
 		notifyForumPosts.setEnabled(enabled);
 		notifyBlogPosts.setEnabled(enabled);
 		notifyVibration.setEnabled(enabled);
-		notifyLockscreen.setEnabled(enabled);
 		notifySound.setEnabled(enabled);
 	}
 
@@ -553,10 +541,6 @@ public class SettingsFragment extends PreferenceFragmentCompat
 			Settings s = new Settings();
 			s.putBoolean(PREF_NOTIFY_VIBRATION, (Boolean) newValue);
 			storeSettings(s);
-		} else if (preference == notifyLockscreen) {
-			Settings s = new Settings();
-			s.putBoolean(PREF_NOTIFY_LOCK_SCREEN, (Boolean) newValue);
-			storeSettings(s);
 		}
 		return true;
 	}

briar-android/src/main/java/org/briarproject/briar/android/sharing/InvitationAdapter.java

@@ -1,6 +1,7 @@
 package org.briarproject.briar.android.sharing;
 
 import android.content.Context;
+import android.support.annotation.NonNull;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -26,7 +27,7 @@ public abstract class InvitationAdapter<I extends InvitationItem, VH extends Inv
 	}
 
 	@Override
-	public void onBindViewHolder(VH ui, int position) {
+	public void onBindViewHolder(@NonNull VH ui, int position) {
 		I item = getItemAt(position);
 		if (item == null) return;
 		ui.onBind(item, listener);

briar-android/src/main/java/org/briarproject/briar/android/threaded/ThreadItemAdapter.java

@@ -1,5 +1,6 @@
 package org.briarproject.briar.android.threaded;
 
+import android.support.annotation.NonNull;
 import android.support.annotation.UiThread;
 import android.support.v7.widget.LinearLayoutManager;
 import android.support.v7.widget.RecyclerView;
@@ -36,8 +37,9 @@ public class ThreadItemAdapter<I extends ThreadItem>
 		this.layoutManager = layoutManager;
 	}
 
+	@NonNull
 	@Override
-	public BaseThreadItemViewHolder<I> onCreateViewHolder(
+	public BaseThreadItemViewHolder<I> onCreateViewHolder(@NonNull
 			ViewGroup parent, int viewType) {
 		View v = LayoutInflater.from(parent.getContext())
 				.inflate(R.layout.list_item_thread, parent, false);
@@ -45,7 +47,8 @@ public class ThreadItemAdapter<I extends ThreadItem>
 	}
 
 	@Override
-	public void onBindViewHolder(BaseThreadItemViewHolder<I> ui, int position) {
+	public void onBindViewHolder(@NonNull BaseThreadItemViewHolder<I> ui,
+			int position) {
 		I item = items.get(position);
 		ui.bind(item, listener);
 	}

briar-android/src/main/java/org/briarproject/briar/android/util/BriarNotificationBuilder.java

@@ -1,15 +1,14 @@
 package org.briarproject.briar.android.util;
 
 import android.content.Context;
-import android.os.Build;
 import android.support.annotation.ColorRes;
 import android.support.v4.app.NotificationCompat;
 import android.support.v4.content.ContextCompat;
 
 import org.briarproject.briar.R;
 
+import static android.os.Build.VERSION.SDK_INT;
 import static android.support.v4.app.NotificationCompat.VISIBILITY_PRIVATE;
-import static android.support.v4.app.NotificationCompat.VISIBILITY_SECRET;
 
 
 public class BriarNotificationBuilder extends NotificationCompat.Builder {
@@ -22,6 +21,7 @@ public class BriarNotificationBuilder extends NotificationCompat.Builder {
 
 		setLights(ContextCompat.getColor(context, R.color.briar_green_light),
 				750, 500);
+		if (SDK_INT >= 21) setVisibility(VISIBILITY_PRIVATE);
 	}
 
 	public BriarNotificationBuilder setColorRes(@ColorRes int res) {
@@ -29,13 +29,8 @@ public class BriarNotificationBuilder extends NotificationCompat.Builder {
 		return this;
 	}
 
-	public BriarNotificationBuilder setLockscreenVisibility(String category,
-			boolean show) {
-		if (Build.VERSION.SDK_INT >= 21) {
-			setCategory(category);
-			if (show) setVisibility(VISIBILITY_PRIVATE);
-			else setVisibility(VISIBILITY_SECRET);
-		}
+	public BriarNotificationBuilder setNotificationCategory(String category) {
+		if (SDK_INT >= 21) setCategory(category);
 		return this;
 	}
 

briar-android/src/main/java/org/briarproject/briar/android/util/UiUtils.java

@@ -61,7 +61,6 @@ import static android.text.format.DateUtils.FORMAT_SHOW_DATE;
 import static android.text.format.DateUtils.MINUTE_IN_MILLIS;
 import static android.text.format.DateUtils.WEEK_IN_MILLIS;
 import static android.view.KeyEvent.ACTION_DOWN;
-import static android.view.KeyEvent.ACTION_UP;
 import static android.view.KeyEvent.KEYCODE_ENTER;
 import static android.view.inputmethod.EditorInfo.IME_NULL;
 import static org.briarproject.briar.BuildConfig.APPLICATION_ID;
@@ -157,7 +156,7 @@ public class UiUtils {
 
 	/**
 	 * Executes the runnable when clicking the link in the textView's text.
-	 *
+	 * <p>
 	 * Attention: This assumes that there's only <b>one</b> link in the text.
 	 */
 	public static void onSingleLinkClick(TextView textView, Runnable runnable) {

briar-android/src/main/java/org/briarproject/briar/android/view/AuthorView.java

@@ -5,11 +5,10 @@ import android.content.res.TypedArray;
 import android.graphics.Typeface;
 import android.support.annotation.DimenRes;
 import android.support.annotation.UiThread;
+import android.support.constraint.ConstraintLayout;
 import android.util.AttributeSet;
 import android.view.LayoutInflater;
-import android.view.View;
 import android.widget.ImageView;
-import android.widget.RelativeLayout;
 import android.widget.TextView;
 
 import org.briarproject.bramble.api.identity.Author;
@@ -30,7 +29,7 @@ import static org.briarproject.bramble.api.identity.Author.Status.OURSELVES;
 import static org.briarproject.briar.android.util.UiUtils.resolveAttribute;
 
 @UiThread
-public class AuthorView extends RelativeLayout {
+public class AuthorView extends ConstraintLayout {
 
 	public static final int NORMAL = 0;
 	public static final int REBLOGGER = 1;
@@ -133,32 +132,24 @@ public class AuthorView extends RelativeLayout {
 				date.setVisibility(VISIBLE);
 				setAvatarSize(R.dimen.blogs_avatar_normal_size);
 				setTextSize(authorName, R.dimen.text_size_small);
-				setCenterVertical(authorName, false);
-				setCenterVertical(trustIndicator, false);
 				break;
 			case REBLOGGER:
 				avatarIcon.setVisibility(VISIBLE);
 				date.setVisibility(VISIBLE);
 				setAvatarSize(R.dimen.blogs_avatar_normal_size);
 				setTextSize(authorName, R.dimen.text_size_small);
-				setCenterVertical(authorName, false);
-				setCenterVertical(trustIndicator, false);
 				break;
 			case COMMENTER:
 				avatarIcon.setVisibility(INVISIBLE);
 				date.setVisibility(VISIBLE);
 				setAvatarSize(R.dimen.blogs_avatar_comment_size);
 				setTextSize(authorName, R.dimen.text_size_tiny);
-				setCenterVertical(authorName, false);
-				setCenterVertical(trustIndicator, false);
 				break;
 			case LIST:
 				avatarIcon.setVisibility(INVISIBLE);
 				date.setVisibility(GONE);
 				setAvatarSize(R.dimen.listitem_picture_size_small);
 				setTextSize(authorName, R.dimen.text_size_medium);
-				setCenterVertical(authorName, true);
-				setCenterVertical(trustIndicator, true);
 				break;
 			case RSS_FEED:
 				avatarIcon.setVisibility(INVISIBLE);
@@ -166,8 +157,6 @@ public class AuthorView extends RelativeLayout {
 				avatar.setImageResource(R.drawable.ic_rss_feed);
 				setAvatarSize(R.dimen.blogs_avatar_normal_size);
 				setTextSize(authorName, R.dimen.text_size_small);
-				setCenterVertical(authorName, false);
-				setCenterVertical(trustIndicator, false);
 				break;
 			case RSS_FEED_REBLOGGED:
 				avatarIcon.setVisibility(INVISIBLE);
@@ -175,8 +164,6 @@ public class AuthorView extends RelativeLayout {
 				avatar.setImageResource(R.drawable.ic_rss_feed);
 				setAvatarSize(R.dimen.blogs_avatar_comment_size);
 				setTextSize(authorName, R.dimen.text_size_tiny);
-				setCenterVertical(authorName, false);
-				setCenterVertical(trustIndicator, false);
 				break;
 		}
 	}
@@ -194,10 +181,4 @@ public class AuthorView extends RelativeLayout {
 		v.setTextSize(COMPLEX_UNIT_PX, textSize);
 	}
 
-	private void setCenterVertical(View v, boolean center) {
-		LayoutParams params = (LayoutParams) v.getLayoutParams();
-		params.addRule(CENTER_VERTICAL, center ? RelativeLayout.TRUE : 0);
-		v.setLayoutParams(params);
-	}
-
 }

briar-android/src/main/java/org/briarproject/briar/android/view/QrCodeView.java

@@ -19,8 +19,7 @@ public class QrCodeView extends FrameLayout {
     private boolean fullscreen = false;
     private FullscreenListener listener;
 
-    public QrCodeView(@NonNull Context context,
-                      @Nullable AttributeSet attrs) {
+    public QrCodeView(@NonNull Context context, @Nullable AttributeSet attrs) {
         super(context, attrs);
         LayoutInflater inflater = (LayoutInflater) context
                 .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

briar-android/src/main/java/org/briarproject/briar/android/view/TextAvatarView.java

@@ -3,7 +3,6 @@ package org.briarproject.briar.android.view;
 import android.content.Context;
 import android.graphics.Color;
 import android.graphics.drawable.ColorDrawable;
-import android.graphics.drawable.Drawable;
 import android.support.annotation.UiThread;
 import android.support.v7.widget.AppCompatTextView;
 import android.util.AttributeSet;
@@ -11,13 +10,11 @@ import android.view.LayoutInflater;
 import android.widget.FrameLayout;
 import android.widget.TextView;
 
-import org.briarproject.bramble.api.identity.Author;
 import org.briarproject.briar.R;
 
 import javax.annotation.Nullable;
 
 import de.hdodenhof.circleimageview.CircleImageView;
-import im.delight.android.identicons.IdenticonDrawable;
 
 @UiThread
 public class TextAvatarView extends FrameLayout {
@@ -35,7 +32,6 @@ public class TextAvatarView extends FrameLayout {
 		character = findViewById(R.id.textAvatarView);
 		background = findViewById(R.id.avatarBackground);
 		badge = findViewById(R.id.unreadCountView);
-		badge.setVisibility(INVISIBLE);
 	}
 
 	public TextAvatarView(Context context) {
@@ -72,10 +68,4 @@ public class TextAvatarView extends FrameLayout {
 		}
 	}
 
-	public void setAuthorAvatar(Author author) {
-		Drawable drawable = new IdenticonDrawable(author.getId().getBytes());
-		background.setImageDrawable(drawable);
-		character.setVisibility(GONE);
-	}
-
 }

briar-android/src/main/java/org/briarproject/briar/android/view/TextInputView.java

@@ -61,9 +61,11 @@ public class TextInputView extends KeyboardAwareLinearLayout {
 	public TextInputView(Context context, @Nullable AttributeSet attrs,
 			int defStyleAttr) {
 		super(context, attrs, defStyleAttr);
-		BriarApplication app =
-				(BriarApplication) context.getApplicationContext();
-		app.getApplicationComponent().inject(this);
+		if (!isInEditMode()) {
+			BriarApplication app =
+					(BriarApplication) context.getApplicationContext();
+			app.getApplicationComponent().inject(this);
+		}
 		setOrientation(VERTICAL);
 		setLayoutTransition(new LayoutTransition());
 		inflateLayout(context);

briar-android/src/main/java/org/briarproject/briar/android/view/UnreadMessageButton.java

@@ -49,7 +49,7 @@ public class UnreadMessageButton extends FrameLayout {
 		setDirection(direction);
 		attributes.recycle();
 
-		setUnreadCount(0);
+		if (!isInEditMode()) setUnreadCount(0);
 	}
 
 	private void setDirection(int direction) {
@@ -64,11 +64,11 @@ public class UnreadMessageButton extends FrameLayout {
 
 	public void setUnreadCount(int count) {
 		if (count == 0) {
-			setVisibility(INVISIBLE);
+			fab.hide();
+			unread.setVisibility(INVISIBLE);
 		} else {
-			// FIXME: Use animations when upgrading to support library 24.2.0
-			//        https://code.google.com/p/android/issues/detail?id=216469
-			setVisibility(VISIBLE);
+			fab.show();
+			unread.setVisibility(VISIBLE);
 			unread.setText(String.valueOf(count));
 		}
 	}

briar-android/src/main/java/org/briarproject/briar/android/widget/LinkDialogFragment.java

@@ -5,6 +5,7 @@ import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.net.Uri;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.support.v4.app.DialogFragment;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -42,8 +43,8 @@ public class LinkDialogFragment extends DialogFragment {
 	}
 
 	@Override
-	public View onCreateView(LayoutInflater inflater, ViewGroup container,
-			Bundle savedInstanceState) {
+	public View onCreateView(@NonNull LayoutInflater inflater,
+			ViewGroup container, Bundle savedInstanceState) {
 
 		View v = inflater.inflate(R.layout.fragment_link_dialog, container,
 				false);

briar-android/src/main/java/org/briarproject/briar/api/android/AndroidNotificationManager.java

@@ -21,7 +21,6 @@ public interface AndroidNotificationManager {
 	String PREF_NOTIFY_RINGTONE_NAME = "notifyRingtoneName";
 	String PREF_NOTIFY_RINGTONE_URI = "notifyRingtoneUri";
 	String PREF_NOTIFY_VIBRATION = "notifyVibration";
-	String PREF_NOTIFY_LOCK_SCREEN = "notifyLockScreen";
 
 	// Notification IDs
 	int ONGOING_NOTIFICATION_ID = 1;

briar-android/src/main/java/org/thoughtcrime/securesms/components/util/FutureTaskListener.java

@@ -1,23 +0,0 @@
-/**
- * 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.thoughtcrime.securesms.components.util;
-
-public interface FutureTaskListener<V> {
-	void onSuccess(V result);
-
-	void onFailure(Throwable error);
-}