Make briar usable as submodule

Provide Tor porst dynamically instead of using hard-coded values 59050 and 59051
2026-02-12 10:49:06 +01:00 · 2021-10-14 09:18:23 +02:00 · 2021-10-14 09:03:22 +02:00
501 changed files with 4384 additions and 20921 deletions
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -32,9 +32,8 @@ test:
  extends: .base-test
  stage: test
  script:
-    - ./gradlew -Djava.security.egd=file:/dev/urandom animalSnifferMain animalSnifferTest
-    - ./gradlew -Djava.security.egd=file:/dev/urandom assembleOfficialDebug :briar-headless:linuxJars
-    - ./gradlew -Djava.security.egd=file:/dev/urandom compileOfficialDebugAndroidTestSources compileScreenshotDebugAndroidTestSources check
+    - ./gradlew --no-daemon -Djava.security.egd=file:/dev/urandom animalSnifferMain animalSnifferTest
+    - ./gradlew --no-daemon -Djava.security.egd=file:/dev/urandom compileOfficialDebugAndroidTestSources compileScreenshotDebugAndroidTestSources check
  rules:
    - if: '$CI_PIPELINE_SOURCE == "merge_request_event"'
      when: always
@@ -62,7 +61,7 @@ android test:
    when: on_failure
  rules:
    - if: '$CI_PIPELINE_SOURCE == "schedule"'
-      when: manual
+      when: on_success
    - if: '$CI_PIPELINE_SOURCE == "merge_request_event"'
      changes:
        - briar-android/**/*
@@ -85,36 +84,35 @@ test_reproducible:

 .optional_tests:
  stage: optional_tests
-  extends: .base-test
+  before_script:
+    - set -e
+    - export GRADLE_USER_HOME=$PWD/.gradle
+
+  cache:
+    key: "$CI_COMMIT_REF_SLUG"
+    paths:
+      - .gradle/wrapper
+      - .gradle/caches
+
+  script:
+    - OPTIONAL_TESTS=org.briarproject.bramble.plugin.tor.BridgeTest ./gradlew --info bramble-java:test --tests BridgeTest
+
+  after_script:
+    # these file change every time but should not be cached
+    - rm -f $GRADLE_USER_HOME/caches/modules-2/modules-2.lock
+    - rm -fr $GRADLE_USER_HOME/caches/*/plugin-resolution/

 bridge test:
  extends: .optional_tests
  rules:
    - if: '$CI_PIPELINE_SOURCE == "schedule"'
      when: on_success
-      allow_failure: false
+      allow_failure: true
    - if: '$CI_COMMIT_TAG == null'
      when: manual
      allow_failure: true
-  script:
-    - OPTIONAL_TESTS=org.briarproject.bramble.plugin.tor.BridgeTest ./gradlew --info bramble-java:test --tests BridgeTest
-  timeout: 3h

-mailbox integration test:
+pre_release_tests:
  extends: .optional_tests
-  rules:
-    - if: '$CI_PIPELINE_SOURCE == "schedule"'
-      when: on_success
-    - if: '$CI_COMMIT_TAG == null'
-      when: manual
-      allow_failure: true # TODO figure out how not to allow failure while leaving this optional
-  script:
-    # start mailbox
-    - cd /opt && git clone --depth 1 https://code.briarproject.org/briar/briar-mailbox.git briar-mailbox
-    - cd briar-mailbox
-    - mkdir -p /root/.local/share # create directory that mailbox (currently) expects to exist
-    - ./gradlew run --args="--debug --setup-token 54686973206973206120736574757020746f6b656e20666f722042726961722e" &
-    # run mailbox integration test once mailbox has started
-    - cd "$CI_PROJECT_DIR"
-    - bramble-core/src/test/bash/wait-for-mailbox.sh
-    - OPTIONAL_TESTS=org.briarproject.bramble.mailbox.MailboxIntegrationTest ./gradlew --info bramble-core:test --tests MailboxIntegrationTest
+  only:
+    - tags
--- a/.idea/runConfigurations/All_tests.xml
+++ b/.idea/runConfigurations/All_tests.xml
@@ -1,32 +1,21 @@
 <component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="All tests" type="GradleRunConfiguration" factoryName="Gradle">
-    <ExternalSystemSettings>
-      <option name="executionName" />
-      <option name="externalProjectPath" value="$PROJECT_DIR$" />
-      <option name="externalSystemIdString" value="GRADLE" />
-      <option name="scriptParameters" value="" />
-      <option name="taskDescriptions">
-        <list />
-      </option>
-      <option name="taskNames">
-        <list>
-          <option value=":briar-android:testOfficialDebugUnitTest" />
-          <option value=":briar-android:testScreenshotDebugUnitTest" />
-        </list>
-      </option>
-      <option name="vmOptions" value="" />
-    </ExternalSystemSettings>
-    <ExternalSystemDebugServerProcess>false</ExternalSystemDebugServerProcess>
-    <ExternalSystemReattachDebugProcess>true</ExternalSystemReattachDebugProcess>
-    <DebugAllEnabled>false</DebugAllEnabled>
+  <configuration default="false" name="All tests" type="AndroidJUnit" factoryName="Android JUnit">
+    <module name="briar.briar-android" />
+    <option name="PACKAGE_NAME" value="" />
+    <option name="MAIN_CLASS_NAME" value="" />
+    <option name="METHOD_NAME" value="" />
+    <option name="TEST_OBJECT" value="package" />
+    <option name="PARAMETERS" value="" />
+    <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$/briar-android" />
    <method v="2">
-      <option name="RunConfigurationTask" enabled="true" run_configuration_name="All tests in bramble-api" run_configuration_type="GradleRunConfiguration" />
-      <option name="RunConfigurationTask" enabled="true" run_configuration_name="All tests in bramble-core" run_configuration_type="GradleRunConfiguration" />
-      <option name="RunConfigurationTask" enabled="true" run_configuration_name="All tests in bramble-java" run_configuration_type="GradleRunConfiguration" />
-      <option name="RunConfigurationTask" enabled="true" run_configuration_name="All tests in bramble-android" run_configuration_type="GradleRunConfiguration" />
-      <option name="RunConfigurationTask" enabled="true" run_configuration_name="All tests in briar-api" run_configuration_type="GradleRunConfiguration" />
-      <option name="RunConfigurationTask" enabled="true" run_configuration_name="All tests in briar-core" run_configuration_type="GradleRunConfiguration" />
-      <option name="RunConfigurationTask" enabled="true" run_configuration_name="All tests in briar-headless" run_configuration_type="GradleRunConfiguration" />
+      <option name="Android.Gradle.BeforeRunTask" enabled="true" />
+      <option name="RunConfigurationTask" enabled="true" run_configuration_name="All tests in bramble-api" run_configuration_type="AndroidJUnit" />
+      <option name="RunConfigurationTask" enabled="true" run_configuration_name="All tests in bramble-core" run_configuration_type="AndroidJUnit" />
+      <option name="RunConfigurationTask" enabled="true" run_configuration_name="All tests in bramble-android" run_configuration_type="AndroidJUnit" />
+      <option name="RunConfigurationTask" enabled="true" run_configuration_name="All tests in bramble-java" run_configuration_type="AndroidJUnit" />
+      <option name="RunConfigurationTask" enabled="true" run_configuration_name="All tests in briar-api" run_configuration_type="AndroidJUnit" />
+      <option name="RunConfigurationTask" enabled="true" run_configuration_name="All tests in briar-core" run_configuration_type="AndroidJUnit" />
+      <option name="RunConfigurationTask" enabled="true" run_configuration_name="All tests in briar-headless" run_configuration_type="AndroidJUnit" />
    </method>
  </configuration>
 </component>
--- a/.idea/runConfigurations/All_tests_in_bramble_android.xml
+++ b/.idea/runConfigurations/All_tests_in_bramble_android.xml
@@ -1,23 +1,14 @@
 <component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="All tests in bramble-android" type="GradleRunConfiguration" factoryName="Gradle">
-    <ExternalSystemSettings>
-      <option name="executionName" />
-      <option name="externalProjectPath" value="$PROJECT_DIR$" />
-      <option name="externalSystemIdString" value="GRADLE" />
-      <option name="scriptParameters" value="" />
-      <option name="taskDescriptions">
-        <list />
-      </option>
-      <option name="taskNames">
-        <list>
-          <option value=":bramble-android:testDebugUnitTest" />
-        </list>
-      </option>
-      <option name="vmOptions" value="" />
-    </ExternalSystemSettings>
-    <ExternalSystemDebugServerProcess>false</ExternalSystemDebugServerProcess>
-    <ExternalSystemReattachDebugProcess>true</ExternalSystemReattachDebugProcess>
-    <DebugAllEnabled>false</DebugAllEnabled>
-    <method v="2" />
+  <configuration default="false" name="All tests in bramble-android" type="AndroidJUnit" factoryName="Android JUnit">
+    <module name="briar.bramble-android" />
+    <option name="PACKAGE_NAME" value="" />
+    <option name="MAIN_CLASS_NAME" value="" />
+    <option name="METHOD_NAME" value="" />
+    <option name="TEST_OBJECT" value="package" />
+    <option name="PARAMETERS" value="" />
+    <option name="WORKING_DIRECTORY" value="file://$PROJECT_DIR$/bramble-android" />
+    <method v="2">
+      <option name="Android.Gradle.BeforeRunTask" enabled="true" />
+    </method>
  </configuration>
 </component>
--- a/.idea/runConfigurations/All_tests_in_bramble_api.xml
+++ b/.idea/runConfigurations/All_tests_in_bramble_api.xml
@@ -1,25 +1,14 @@
 <component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="All tests in bramble-api" type="GradleRunConfiguration" factoryName="Gradle">
-    <ExternalSystemSettings>
-      <option name="executionName" />
-      <option name="externalProjectPath" value="$PROJECT_DIR$" />
-      <option name="externalSystemIdString" value="GRADLE" />
-      <option name="scriptParameters" value="" />
-      <option name="taskDescriptions">
-        <list />
-      </option>
-      <option name="taskNames">
-        <list>
-          <option value=":bramble-api:animalSnifferMain" />
-          <option value=":bramble-api:animalSnifferTest" />
-          <option value=":bramble-api:test" />
-        </list>
-      </option>
-      <option name="vmOptions" value="" />
-    </ExternalSystemSettings>
-    <ExternalSystemDebugServerProcess>false</ExternalSystemDebugServerProcess>
-    <ExternalSystemReattachDebugProcess>true</ExternalSystemReattachDebugProcess>
-    <DebugAllEnabled>false</DebugAllEnabled>
-    <method v="2" />
+  <configuration default="false" name="All tests in bramble-api" type="AndroidJUnit" factoryName="Android JUnit">
+    <module name="briar.bramble-api" />
+    <option name="PACKAGE_NAME" value="" />
+    <option name="MAIN_CLASS_NAME" value="" />
+    <option name="METHOD_NAME" value="" />
+    <option name="TEST_OBJECT" value="package" />
+    <option name="PARAMETERS" value="" />
+    <option name="WORKING_DIRECTORY" value="file://$PROJECT_DIR$/bramble-api" />
+    <method v="2">
+      <option name="Android.Gradle.BeforeRunTask" enabled="true" />
+    </method>
  </configuration>
 </component>
--- a/.idea/runConfigurations/All_tests_in_bramble_core.xml
+++ b/.idea/runConfigurations/All_tests_in_bramble_core.xml
@@ -1,25 +1,14 @@
 <component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="All tests in bramble-core" type="GradleRunConfiguration" factoryName="Gradle">
-    <ExternalSystemSettings>
-      <option name="executionName" />
-      <option name="externalProjectPath" value="$PROJECT_DIR$" />
-      <option name="externalSystemIdString" value="GRADLE" />
-      <option name="scriptParameters" value="" />
-      <option name="taskDescriptions">
-        <list />
-      </option>
-      <option name="taskNames">
-        <list>
-          <option value=":bramble-core:animalSnifferMain" />
-          <option value=":bramble-core:animalSnifferTest" />
-          <option value=":bramble-core:test" />
-        </list>
-      </option>
-      <option name="vmOptions" value="" />
-    </ExternalSystemSettings>
-    <ExternalSystemDebugServerProcess>false</ExternalSystemDebugServerProcess>
-    <ExternalSystemReattachDebugProcess>true</ExternalSystemReattachDebugProcess>
-    <DebugAllEnabled>false</DebugAllEnabled>
-    <method v="2" />
+  <configuration default="false" name="All tests in bramble-core" type="AndroidJUnit" factoryName="Android JUnit">
+    <module name="briar.bramble-core" />
+    <option name="PACKAGE_NAME" value="" />
+    <option name="MAIN_CLASS_NAME" value="" />
+    <option name="METHOD_NAME" value="" />
+    <option name="TEST_OBJECT" value="package" />
+    <option name="PARAMETERS" value="" />
+    <option name="WORKING_DIRECTORY" value="file://$PROJECT_DIR$/bramble-core" />
+    <method v="2">
+      <option name="Android.Gradle.BeforeRunTask" enabled="true" />
+    </method>
  </configuration>
 </component>
--- a/.idea/runConfigurations/All_tests_in_bramble_java.xml
+++ b/.idea/runConfigurations/All_tests_in_bramble_java.xml
@@ -1,23 +1,15 @@
 <component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="All tests in bramble-java" type="GradleRunConfiguration" factoryName="Gradle">
-    <ExternalSystemSettings>
-      <option name="executionName" />
-      <option name="externalProjectPath" value="$PROJECT_DIR$" />
-      <option name="externalSystemIdString" value="GRADLE" />
-      <option name="scriptParameters" value="" />
-      <option name="taskDescriptions">
-        <list />
-      </option>
-      <option name="taskNames">
-        <list>
-          <option value=":bramble-java:test" />
-        </list>
-      </option>
-      <option name="vmOptions" value="" />
-    </ExternalSystemSettings>
-    <ExternalSystemDebugServerProcess>false</ExternalSystemDebugServerProcess>
-    <ExternalSystemReattachDebugProcess>true</ExternalSystemReattachDebugProcess>
-    <DebugAllEnabled>false</DebugAllEnabled>
-    <method v="2" />
+  <configuration default="false" name="All tests in bramble-java" type="AndroidJUnit" factoryName="Android JUnit">
+    <module name="briar.bramble-java" />
+    <option name="PACKAGE_NAME" value="" />
+    <option name="MAIN_CLASS_NAME" value="" />
+    <option name="METHOD_NAME" value="" />
+    <option name="TEST_OBJECT" value="package" />
+    <option name="VM_PARAMETERS" value="-ea -Djava.library.path=libs" />
+    <option name="PARAMETERS" value="" />
+    <option name="WORKING_DIRECTORY" value="file://$PROJECT_DIR$/bramble-java" />
+    <method v="2">
+      <option name="Android.Gradle.BeforeRunTask" enabled="true" />
+    </method>
  </configuration>
 </component>
--- a/.idea/runConfigurations/All_tests_in_briar_android.xml
+++ b/.idea/runConfigurations/All_tests_in_briar_android.xml
@@ -1,24 +1,14 @@
 <component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="All tests in briar-android" type="GradleRunConfiguration" factoryName="Gradle">
-    <ExternalSystemSettings>
-      <option name="executionName" />
-      <option name="externalProjectPath" value="$PROJECT_DIR$" />
-      <option name="externalSystemIdString" value="GRADLE" />
-      <option name="scriptParameters" value="" />
-      <option name="taskDescriptions">
-        <list />
-      </option>
-      <option name="taskNames">
-        <list>
-          <option value=":briar-android:testOfficialDebugUnitTest" />
-          <option value=":briar-android:testScreenshotDebugUnitTest" />
-        </list>
-      </option>
-      <option name="vmOptions" value="" />
-    </ExternalSystemSettings>
-    <ExternalSystemDebugServerProcess>false</ExternalSystemDebugServerProcess>
-    <ExternalSystemReattachDebugProcess>true</ExternalSystemReattachDebugProcess>
-    <DebugAllEnabled>false</DebugAllEnabled>
-    <method v="2" />
+  <configuration default="false" name="All tests in briar-android" type="AndroidJUnit" factoryName="Android JUnit">
+    <module name="briar.briar-android" />
+    <option name="PACKAGE_NAME" value="" />
+    <option name="MAIN_CLASS_NAME" value="" />
+    <option name="METHOD_NAME" value="" />
+    <option name="TEST_OBJECT" value="package" />
+    <option name="PARAMETERS" value="" />
+    <option name="WORKING_DIRECTORY" value="file://$PROJECT_DIR$/briar-android" />
+    <method v="2">
+      <option name="Android.Gradle.BeforeRunTask" enabled="true" />
+    </method>
  </configuration>
 </component>
--- a/.idea/runConfigurations/All_tests_in_briar_api.xml
+++ b/.idea/runConfigurations/All_tests_in_briar_api.xml
@@ -1,25 +1,14 @@
 <component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="All tests in briar-api" type="GradleRunConfiguration" factoryName="Gradle">
-    <ExternalSystemSettings>
-      <option name="executionName" />
-      <option name="externalProjectPath" value="$PROJECT_DIR$" />
-      <option name="externalSystemIdString" value="GRADLE" />
-      <option name="scriptParameters" value="" />
-      <option name="taskDescriptions">
-        <list />
-      </option>
-      <option name="taskNames">
-        <list>
-          <option value=":briar-api:animalSnifferMain" />
-          <option value=":briar-api:animalSnifferTest" />
-          <option value=":briar-api:test" />
-        </list>
-      </option>
-      <option name="vmOptions" value="" />
-    </ExternalSystemSettings>
-    <ExternalSystemDebugServerProcess>false</ExternalSystemDebugServerProcess>
-    <ExternalSystemReattachDebugProcess>true</ExternalSystemReattachDebugProcess>
-    <DebugAllEnabled>false</DebugAllEnabled>
-    <method v="2" />
+  <configuration default="false" name="All tests in briar-api" type="AndroidJUnit" factoryName="Android JUnit">
+    <module name="briar.briar-api" />
+    <option name="PACKAGE_NAME" value="" />
+    <option name="MAIN_CLASS_NAME" value="" />
+    <option name="METHOD_NAME" value="" />
+    <option name="TEST_OBJECT" value="package" />
+    <option name="PARAMETERS" value="" />
+    <option name="WORKING_DIRECTORY" value="file://$PROJECT_DIR$/briar-api" />
+    <method v="2">
+      <option name="Android.Gradle.BeforeRunTask" enabled="true" />
+    </method>
  </configuration>
 </component>
--- a/.idea/runConfigurations/All_tests_in_briar_core.xml
+++ b/.idea/runConfigurations/All_tests_in_briar_core.xml
@@ -1,25 +1,14 @@
 <component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="All tests in briar-core" type="GradleRunConfiguration" factoryName="Gradle">
-    <ExternalSystemSettings>
-      <option name="executionName" />
-      <option name="externalProjectPath" value="$PROJECT_DIR$" />
-      <option name="externalSystemIdString" value="GRADLE" />
-      <option name="scriptParameters" value="" />
-      <option name="taskDescriptions">
-        <list />
-      </option>
-      <option name="taskNames">
-        <list>
-          <option value=":briar-core:animalSnifferMain" />
-          <option value=":briar-core:animalSnifferTest" />
-          <option value=":briar-core:test" />
-        </list>
-      </option>
-      <option name="vmOptions" value="" />
-    </ExternalSystemSettings>
-    <ExternalSystemDebugServerProcess>false</ExternalSystemDebugServerProcess>
-    <ExternalSystemReattachDebugProcess>true</ExternalSystemReattachDebugProcess>
-    <DebugAllEnabled>false</DebugAllEnabled>
-    <method v="2" />
+  <configuration default="false" name="All tests in briar-core" type="AndroidJUnit" factoryName="Android JUnit">
+    <module name="briar.briar-core" />
+    <option name="PACKAGE_NAME" value="" />
+    <option name="MAIN_CLASS_NAME" value="" />
+    <option name="METHOD_NAME" value="" />
+    <option name="TEST_OBJECT" value="package" />
+    <option name="PARAMETERS" value="" />
+    <option name="WORKING_DIRECTORY" value="file://$PROJECT_DIR$/briar-core" />
+    <method v="2">
+      <option name="Android.Gradle.BeforeRunTask" enabled="true" />
+    </method>
  </configuration>
 </component>
--- a/.idea/runConfigurations/All_tests_in_briar_headless.xml
+++ b/.idea/runConfigurations/All_tests_in_briar_headless.xml
@@ -1,23 +1,15 @@
 <component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="All tests in briar-headless" type="GradleRunConfiguration" factoryName="Gradle">
-    <ExternalSystemSettings>
-      <option name="executionName" />
-      <option name="externalProjectPath" value="$PROJECT_DIR$" />
-      <option name="externalSystemIdString" value="GRADLE" />
-      <option name="scriptParameters" value="" />
-      <option name="taskDescriptions">
-        <list />
-      </option>
-      <option name="taskNames">
-        <list>
-          <option value=":briar-headless:test" />
-        </list>
-      </option>
-      <option name="vmOptions" value="" />
-    </ExternalSystemSettings>
-    <ExternalSystemDebugServerProcess>false</ExternalSystemDebugServerProcess>
-    <ExternalSystemReattachDebugProcess>true</ExternalSystemReattachDebugProcess>
-    <DebugAllEnabled>false</DebugAllEnabled>
-    <method v="2" />
+  <configuration default="false" name="All tests in briar-headless" type="AndroidJUnit" factoryName="Android JUnit">
+    <module name="briar.briar-headless" />
+    <option name="PACKAGE_NAME" value="org.briarproject.briar.headless" />
+    <option name="MAIN_CLASS_NAME" value="" />
+    <option name="METHOD_NAME" value="" />
+    <option name="TEST_OBJECT" value="package" />
+    <option name="VM_PARAMETERS" />
+    <option name="PARAMETERS" value="" />
+    <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$/briar-headless" />
+    <method v="2">
+      <option name="Android.Gradle.BeforeRunTask" enabled="true" />
+    </method>
  </configuration>
 </component>
--- a/.idea/runConfigurations/BridgeTest.xml
+++ b/.idea/runConfigurations/BridgeTest.xml
@@ -1,28 +1,24 @@
 <component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="BridgeTest" type="GradleRunConfiguration" factoryName="Gradle">
-    <ExternalSystemSettings>
-      <option name="env">
-        <map>
-          <entry key="OPTIONAL_TESTS" value="org.briarproject.bramble.plugin.tor.BridgeTest" />
-        </map>
-      </option>
-      <option name="executionName" />
-      <option name="externalProjectPath" value="$PROJECT_DIR$" />
-      <option name="externalSystemIdString" value="GRADLE" />
-      <option name="scriptParameters" value="--tests &quot;org.briarproject.bramble.plugin.tor.BridgeTest&quot;" />
-      <option name="taskDescriptions">
-        <list />
-      </option>
-      <option name="taskNames">
-        <list>
-          <option value=":bramble-java:test" />
-        </list>
-      </option>
-      <option name="vmOptions" value="" />
-    </ExternalSystemSettings>
-    <ExternalSystemDebugServerProcess>false</ExternalSystemDebugServerProcess>
-    <ExternalSystemReattachDebugProcess>true</ExternalSystemReattachDebugProcess>
-    <DebugAllEnabled>false</DebugAllEnabled>
-    <method v="2" />
+  <configuration default="false" name="BridgeTest" type="AndroidJUnit" factoryName="Android JUnit" nameIsGenerated="true">
+    <module name="briar.bramble-java" />
+    <useClassPathOnly />
+    <extension name="coverage">
+      <pattern>
+        <option name="PATTERN" value="org.briarproject.bramble.plugin.tor.*" />
+        <option name="ENABLED" value="true" />
+      </pattern>
+    </extension>
+    <option name="PACKAGE_NAME" value="org.briarproject.bramble.plugin.tor" />
+    <option name="MAIN_CLASS_NAME" value="org.briarproject.bramble.plugin.tor.BridgeTest" />
+    <option name="METHOD_NAME" value="" />
+    <option name="TEST_OBJECT" value="class" />
+    <option name="PARAMETERS" value="" />
+    <option name="WORKING_DIRECTORY" value="$MODULE_DIR$" />
+    <envs>
+      <env name="OPTIONAL_TESTS" value="org.briarproject.bramble.plugin.tor.BridgeTest" />
+    </envs>
+    <method v="2">
+      <option name="Android.Gradle.BeforeRunTask" enabled="true" />
+    </method>
  </configuration>
 </component>
--- a/.idea/runConfigurations/H2_Performance_Test.xml
+++ b/.idea/runConfigurations/H2_Performance_Test.xml
@@ -0,0 +1,14 @@
+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="H2 Performance Test" type="AndroidJUnit" factoryName="Android JUnit">
+    <module name="briar.bramble-core" />
+    <option name="PACKAGE_NAME" value="org.briarproject.bramble.db" />
+    <option name="MAIN_CLASS_NAME" value="org.briarproject.bramble.db.H2DatabasePerformanceTest" />
+    <option name="METHOD_NAME" value="" />
+    <option name="TEST_OBJECT" value="class" />
+    <option name="PARAMETERS" value="" />
+    <option name="WORKING_DIRECTORY" value="" />
+    <method v="2">
+      <option name="Android.Gradle.BeforeRunTask" enabled="true" />
+    </method>
+  </configuration>
+</component>
--- a/.idea/runConfigurations/HyperSQL_Performance_Test.xml
+++ b/.idea/runConfigurations/HyperSQL_Performance_Test.xml
@@ -0,0 +1,14 @@
+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="HyperSQL Performance Test" type="AndroidJUnit" factoryName="Android JUnit">
+    <module name="briar.bramble-core" />
+    <option name="PACKAGE_NAME" value="org.briarproject.bramble.db" />
+    <option name="MAIN_CLASS_NAME" value="org.briarproject.bramble.db.HyperSqlDatabasePerformanceTest" />
+    <option name="METHOD_NAME" value="" />
+    <option name="TEST_OBJECT" value="class" />
+    <option name="PARAMETERS" value="" />
+    <option name="WORKING_DIRECTORY" value="" />
+    <method v="2">
+      <option name="Android.Gradle.BeforeRunTask" enabled="true" />
+    </method>
+  </configuration>
+</component>
--- a/README.md
+++ b/README.md
@@ -22,15 +22,6 @@ our site.

 [Wiki](https://code.briarproject.org/briar/briar/-/wikis/home)

-## Reproducible builds
-
-We provide [docker images](https://code.briarproject.org/briar/briar-reproducer#briar-reproducer)
-to ease the task of verifying that the published APK binaries
-include nothing but our publicly available source code.
-
-You can either use those images or use them as a blueprint to build your own environment
-for reproduction.
-
 ## Donate

 [![Donate using Liberapay](https://briarproject.org/img/liberapay.svg)](https://liberapay.com/Briar/donate) [![Flattr this](https://briarproject.org/img/flattr-badge-large.png "Flattr this")](https://flattr.com/t/592836/)   
--- a/bramble-android/build.gradle
+++ b/bramble-android/build.gradle
@@ -15,8 +15,8 @@ android {
 	defaultConfig {
 		minSdkVersion 16
 		targetSdkVersion 30
-		versionCode 10408
-		versionName "1.4.8"
+		versionCode 10308
+		versionName "1.3.8"
 		consumerProguardFiles 'proguard-rules.txt'

 		testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
@@ -41,19 +41,19 @@ configurations {
 }

 dependencies {
-	implementation project(path: ':bramble-core', configuration: 'default')
-	tor "org.briarproject:tor-android:$tor_version"
-	tor "org.briarproject:obfs4proxy-android:$obfs4proxy_version"
+	implementation project(path: ':briar:bramble-core', configuration: 'default')
+	tor 'org.briarproject:tor-android:0.3.5.15'
+	tor 'org.briarproject:obfs4proxy-android:0.0.12-dev-40245c4a@zip'

 	annotationProcessor "com.google.dagger:dagger-compiler:$dagger_version"

 	compileOnly 'javax.annotation:jsr250-api:1.0'

-	testImplementation project(path: ':bramble-api', configuration: 'testOutput')
+	testImplementation project(path: ':briar:bramble-api', configuration: 'testOutput')
 	testImplementation "junit:junit:$junit_version"
 	testImplementation "org.jmock:jmock:$jmock_version"
 	testImplementation "org.jmock:jmock-junit4:$jmock_version"
-	testImplementation "org.jmock:jmock-imposters:$jmock_version"
+	testImplementation "org.jmock:jmock-legacy:$jmock_version"
 }

 def torBinariesDir = 'src/main/res/raw'
@@ -70,6 +70,11 @@ clean.dependsOn cleanTorBinaries

 task unpackTorBinaries {
 	doLast {
+		copy {
+			from configurations.tor.collect { zipTree(it) }
+			into torBinariesDir
+			include 'geoip.zip'
+		}
 		configurations.tor.each { outer ->
 			zipTree(outer).each { inner ->
 				if (inner.name.endsWith('_arm_pie.zip')) {
--- a/bramble-android/proguard-rules.txt
+++ b/bramble-android/proguard-rules.txt
@@ -1,8 +1,6 @@
-# Keep the H2 classes that are loaded via reflection
-keep class org.h2.Driver { *; }
-keep class org.h2.engine.Engine { *; }
-keep class org.h2.store.fs.** { *; }
-# Don't warn about unused dependencies of H2 classes
+-keep,includedescriptorclasses class org.briarproject.** { *; }
+
+-keep class org.h2.** { *; }
 -dontwarn org.h2.**
 -dontnote org.h2.**

@@ -17,4 +15,5 @@
 -dontwarn sun.misc.Unsafe
 -dontnote com.google.common.**

-dontwarn com.fasterxml.jackson.databind.ext.Java7SupportImpl
+# UPnP library isn't used
+-dontwarn org.bitlet.weupnp.**
--- a/bramble-android/src/main/java/org/briarproject/bramble/network/AndroidNetworkManager.java
+++ b/bramble-android/src/main/java/org/briarproject/bramble/network/AndroidNetworkManager.java
@@ -11,10 +11,7 @@ import android.net.LinkAddress;
 import android.net.LinkProperties;
 import android.net.Network;
 import android.net.NetworkInfo;
-import android.net.wifi.WifiInfo;
-import android.net.wifi.WifiManager;

-import org.briarproject.bramble.api.Cancellable;
 import org.briarproject.bramble.api.event.EventBus;
 import org.briarproject.bramble.api.event.EventExecutor;
 import org.briarproject.bramble.api.lifecycle.Service;
@@ -24,6 +21,7 @@ import org.briarproject.bramble.api.network.event.NetworkStatusEvent;
 import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
 import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
 import org.briarproject.bramble.api.system.TaskScheduler;
+import org.briarproject.bramble.api.system.TaskScheduler.Cancellable;

 import java.net.Inet4Address;
 import java.net.InetAddress;
@@ -40,7 +38,6 @@ import javax.annotation.Nullable;
 import javax.inject.Inject;

 import static android.content.Context.CONNECTIVITY_SERVICE;
-import static android.content.Context.WIFI_SERVICE;
 import static android.content.Intent.ACTION_SCREEN_OFF;
 import static android.content.Intent.ACTION_SCREEN_ON;
 import static android.net.ConnectivityManager.CONNECTIVITY_ACTION;
@@ -114,37 +111,15 @@ class AndroidNetworkManager implements NetworkManager, Service {

 	@Override
 	public NetworkStatus getNetworkStatus() {
-		// https://issuetracker.google.com/issues/175055271
-		try {
-			NetworkInfo net = connectivityManager.getActiveNetworkInfo();
-			boolean connected = net != null && net.isConnected();
-			boolean wifi = false, ipv6Only = false;
-			if (connected) {
-				wifi = net.getType() == TYPE_WIFI;
-				if (SDK_INT >= 23) ipv6Only = isActiveNetworkIpv6Only();
-				else ipv6Only = areAllAvailableNetworksIpv6Only();
-			}
-			return new NetworkStatus(connected, wifi, ipv6Only);
-		} catch (SecurityException e) {
-			logException(LOG, WARNING, e);
-			// Without the ConnectivityManager we can't detect whether we have
-			// internet access. Assume we do, which is probably less harmful
-			// than assuming we don't. Likewise, assume the connection is
-			// IPv6-only. Fall back to the WifiManager to detect whether we
-			// have a wifi connection.
-			LOG.info("ConnectivityManager is broken, guessing connectivity");
-			boolean connected = true, wifi = false, ipv6Only = true;
-			WifiManager wm = (WifiManager) app.getSystemService(WIFI_SERVICE);
-			if (wm != null) {
-				WifiInfo info = wm.getConnectionInfo();
-				if (info != null && info.getIpAddress() != 0) {
-					LOG.info("Connected to wifi");
-					wifi = true;
-					ipv6Only = false;
-				}
-			}
-			return new NetworkStatus(connected, wifi, ipv6Only);
+		NetworkInfo net = connectivityManager.getActiveNetworkInfo();
+		boolean connected = net != null && net.isConnected();
+		boolean wifi = false, ipv6Only = false;
+		if (connected) {
+			wifi = net.getType() == TYPE_WIFI;
+			if (SDK_INT >= 23) ipv6Only = isActiveNetworkIpv6Only();
+			else ipv6Only = areAllAvailableNetworksIpv6Only();
 		}
+		return new NetworkStatus(connected, wifi, ipv6Only);
 	}

 	/**
@@ -155,29 +130,23 @@ class AndroidNetworkManager implements NetworkManager, Service {
 	 */
 	@TargetApi(23)
 	private boolean isActiveNetworkIpv6Only() {
-		// https://issuetracker.google.com/issues/175055271
-		try {
-			Network net = connectivityManager.getActiveNetwork();
-			if (net == null) {
-				LOG.info("No active network");
-				return false;
-			}
-			LinkProperties props = connectivityManager.getLinkProperties(net);
-			if (props == null) {
-				LOG.info("No link properties for active network");
-				return false;
-			}
-			boolean hasIpv6Unicast = false;
-			for (LinkAddress linkAddress : props.getLinkAddresses()) {
-				InetAddress addr = linkAddress.getAddress();
-				if (addr instanceof Inet4Address) return false;
-				if (!addr.isMulticastAddress()) hasIpv6Unicast = true;
-			}
-			return hasIpv6Unicast;
-		} catch (SecurityException e) {
-			logException(LOG, WARNING, e);
+		Network net = connectivityManager.getActiveNetwork();
+		if (net == null) {
+			LOG.info("No active network");
 			return false;
 		}
+		LinkProperties props = connectivityManager.getLinkProperties(net);
+		if (props == null) {
+			LOG.info("No link properties for active network");
+			return false;
+		}
+		boolean hasIpv6Unicast = false;
+		for (LinkAddress linkAddress : props.getLinkAddresses()) {
+			InetAddress addr = linkAddress.getAddress();
+			if (addr instanceof Inet4Address) return false;
+			if (!addr.isMulticastAddress()) hasIpv6Unicast = true;
+		}
+		return hasIpv6Unicast;
 	}

 	/**
--- a/bramble-android/src/main/java/org/briarproject/bramble/plugin/bluetooth/AndroidBluetoothPluginFactory.java
+++ b/bramble-android/src/main/java/org/briarproject/bramble/plugin/bluetooth/AndroidBluetoothPluginFactory.java
@@ -86,8 +86,8 @@ public class AndroidBluetoothPluginFactory implements DuplexPluginFactory {
 		BluetoothConnectionFactory<BluetoothSocket> connectionFactory =
 				new AndroidBluetoothConnectionFactory(connectionLimiter,
 						wakeLockManager, timeoutMonitor);
-		Backoff backoff = backoffFactory.createBackoff(eventBus, ID,
-				MIN_POLLING_INTERVAL, MAX_POLLING_INTERVAL, BACKOFF_BASE);
+		Backoff backoff = backoffFactory.createBackoff(MIN_POLLING_INTERVAL,
+				MAX_POLLING_INTERVAL, BACKOFF_BASE);
 		AndroidBluetoothPlugin plugin = new AndroidBluetoothPlugin(
 				connectionLimiter, connectionFactory, ioExecutor,
 				wakefulIoExecutor, secureRandom, androidExecutor, app,
--- a/bramble-android/src/main/java/org/briarproject/bramble/plugin/file/AndroidRemovableDrivePlugin.java
+++ b/bramble-android/src/main/java/org/briarproject/bramble/plugin/file/AndroidRemovableDrivePlugin.java
@@ -32,22 +32,13 @@ class AndroidRemovableDrivePlugin extends RemovableDrivePlugin {
 	InputStream openInputStream(TransportProperties p) throws IOException {
 		String uri = p.get(PROP_URI);
 		if (isNullOrEmpty(uri)) throw new IllegalArgumentException();
-		try {
-			return app.getContentResolver().openInputStream(Uri.parse(uri));
-		} catch (SecurityException e) {
-			throw new IOException(e);
-		}
+		return app.getContentResolver().openInputStream(Uri.parse(uri));
 	}

 	@Override
 	OutputStream openOutputStream(TransportProperties p) throws IOException {
 		String uri = p.get(PROP_URI);
 		if (isNullOrEmpty(uri)) throw new IllegalArgumentException();
-		try {
-			return app.getContentResolver()
-					.openOutputStream(Uri.parse(uri), "wt");
-		} catch (SecurityException e) {
-			throw new IOException(e);
-		}
+		return app.getContentResolver().openOutputStream(Uri.parse(uri));
 	}
 }
--- a/bramble-android/src/main/java/org/briarproject/bramble/plugin/tcp/AndroidLanTcpPlugin.java
+++ b/bramble-android/src/main/java/org/briarproject/bramble/plugin/tcp/AndroidLanTcpPlugin.java
@@ -175,24 +175,16 @@ class AndroidLanTcpPlugin extends LanTcpPlugin {
 	@TargetApi(21)
 	@Nullable
 	private InetAddress getWifiClientIpv6Address() {
-		// https://issuetracker.google.com/issues/175055271
-		try {
-			for (Network net : connectivityManager.getAllNetworks()) {
-				NetworkCapabilities caps =
-						connectivityManager.getNetworkCapabilities(net);
-				if (caps == null || !caps.hasTransport(TRANSPORT_WIFI)) {
-					continue;
-				}
-				LinkProperties props =
-						connectivityManager.getLinkProperties(net);
-				if (props == null) continue;
-				for (LinkAddress linkAddress : props.getLinkAddresses()) {
-					InetAddress addr = linkAddress.getAddress();
-					if (isIpv6LinkLocalAddress(addr)) return addr;
-				}
+		for (Network net : connectivityManager.getAllNetworks()) {
+			NetworkCapabilities caps =
+					connectivityManager.getNetworkCapabilities(net);
+			if (caps == null || !caps.hasTransport(TRANSPORT_WIFI)) continue;
+			LinkProperties props = connectivityManager.getLinkProperties(net);
+			if (props == null) continue;
+			for (LinkAddress linkAddress : props.getLinkAddresses()) {
+				InetAddress addr = linkAddress.getAddress();
+				if (isIpv6LinkLocalAddress(addr)) return addr;
 			}
-		} catch (SecurityException e) {
-			logException(LOG, WARNING, e);
 		}
 		return null;
 	}
@@ -235,17 +227,12 @@ class AndroidLanTcpPlugin extends LanTcpPlugin {
 	// network's socket factory may try to connect via another network
 	private SocketFactory getSocketFactory() {
 		if (SDK_INT < 21) return SocketFactory.getDefault();
-		// https://issuetracker.google.com/issues/175055271
-		try {
-			for (Network net : connectivityManager.getAllNetworks()) {
-				NetworkCapabilities caps =
-						connectivityManager.getNetworkCapabilities(net);
-				if (caps != null && caps.hasTransport(TRANSPORT_WIFI)) {
-					return net.getSocketFactory();
-				}
+		for (Network net : connectivityManager.getAllNetworks()) {
+			NetworkCapabilities caps =
+					connectivityManager.getNetworkCapabilities(net);
+			if (caps != null && caps.hasTransport(TRANSPORT_WIFI)) {
+				return net.getSocketFactory();
 			}
-		} catch (SecurityException e) {
-			logException(LOG, WARNING, e);
 		}
 		LOG.warning("Could not find suitable socket factory");
 		return SocketFactory.getDefault();
--- a/bramble-android/src/main/java/org/briarproject/bramble/plugin/tcp/AndroidLanTcpPluginFactory.java
+++ b/bramble-android/src/main/java/org/briarproject/bramble/plugin/tcp/AndroidLanTcpPluginFactory.java
@@ -61,8 +61,8 @@ public class AndroidLanTcpPluginFactory implements DuplexPluginFactory {

 	@Override
 	public DuplexPlugin createPlugin(PluginCallback callback) {
-		Backoff backoff = backoffFactory.createBackoff(eventBus, ID,
-				MIN_POLLING_INTERVAL, MAX_POLLING_INTERVAL, BACKOFF_BASE);
+		Backoff backoff = backoffFactory.createBackoff(MIN_POLLING_INTERVAL,
+				MAX_POLLING_INTERVAL, BACKOFF_BASE);
 		AndroidLanTcpPlugin plugin = new AndroidLanTcpPlugin(ioExecutor,
 				wakefulIoExecutor, app, backoff, callback,
 				MAX_LATENCY, MAX_IDLE_TIME, CONNECTION_TIMEOUT);
--- a/bramble-android/src/main/java/org/briarproject/bramble/plugin/tor/AndroidTorPlugin.java
+++ b/bramble-android/src/main/java/org/briarproject/bramble/plugin/tor/AndroidTorPlugin.java
@@ -9,12 +9,14 @@ import org.briarproject.bramble.api.battery.BatteryManager;
 import org.briarproject.bramble.api.network.NetworkManager;
 import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
 import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
+import org.briarproject.bramble.api.plugin.Backoff;
 import org.briarproject.bramble.api.plugin.PluginCallback;
 import org.briarproject.bramble.api.system.AndroidWakeLock;
 import org.briarproject.bramble.api.system.AndroidWakeLockManager;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.api.system.LocationUtils;
 import org.briarproject.bramble.api.system.ResourceProvider;
+import org.briarproject.bramble.plugin.TorPorts;
 import org.briarproject.bramble.util.AndroidUtils;

 import java.io.File;
@@ -58,24 +60,24 @@ class AndroidTorPlugin extends TorPlugin {
 			NetworkManager networkManager,
 			LocationUtils locationUtils,
 			SocketFactory torSocketFactory,
+			TorPorts torPorts,
 			Clock clock,
 			ResourceProvider resourceProvider,
 			CircumventionProvider circumventionProvider,
 			BatteryManager batteryManager,
 			AndroidWakeLockManager wakeLockManager,
+			Backoff backoff,
 			TorRendezvousCrypto torRendezvousCrypto,
 			PluginCallback callback,
 			String architecture,
 			long maxLatency,
 			int maxIdleTime,
-			File torDirectory,
-			int torSocksPort,
-			int torControlPort) {
+			File torDirectory) {
 		super(ioExecutor, wakefulIoExecutor, networkManager, locationUtils,
-				torSocketFactory, clock, resourceProvider,
-				circumventionProvider, batteryManager,
+				torSocketFactory, torPorts, clock, resourceProvider,
+				circumventionProvider, batteryManager, backoff,
 				torRendezvousCrypto, callback, architecture, maxLatency,
-				maxIdleTime, torDirectory, torSocksPort, torControlPort);
+				maxIdleTime, torDirectory);
 		this.app = app;
 		wakeLock = wakeLockManager.createWakeLock("TorPlugin");
 		String nativeLibDir = app.getApplicationInfo().nativeLibraryDir;
--- a/bramble-android/src/main/java/org/briarproject/bramble/plugin/tor/AndroidTorPluginFactory.java
+++ b/bramble-android/src/main/java/org/briarproject/bramble/plugin/tor/AndroidTorPluginFactory.java
@@ -3,85 +3,142 @@ package org.briarproject.bramble.plugin.tor;
 import android.app.Application;

 import org.briarproject.bramble.api.battery.BatteryManager;
-import org.briarproject.bramble.api.crypto.CryptoComponent;
 import org.briarproject.bramble.api.event.EventBus;
 import org.briarproject.bramble.api.lifecycle.IoExecutor;
 import org.briarproject.bramble.api.network.NetworkManager;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.plugin.Backoff;
+import org.briarproject.bramble.api.plugin.BackoffFactory;
 import org.briarproject.bramble.api.plugin.PluginCallback;
-import org.briarproject.bramble.api.plugin.TorControlPort;
+import org.briarproject.bramble.api.plugin.TorConstants;
 import org.briarproject.bramble.api.plugin.TorDirectory;
-import org.briarproject.bramble.api.plugin.TorSocksPort;
+import org.briarproject.bramble.api.plugin.TransportId;
+import org.briarproject.bramble.api.plugin.duplex.DuplexPlugin;
+import org.briarproject.bramble.api.plugin.duplex.DuplexPluginFactory;
 import org.briarproject.bramble.api.system.AndroidWakeLockManager;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.api.system.LocationUtils;
 import org.briarproject.bramble.api.system.ResourceProvider;
 import org.briarproject.bramble.api.system.WakefulIoExecutor;
+import org.briarproject.bramble.plugin.TorPorts;
+import org.briarproject.bramble.util.AndroidUtils;

 import java.io.File;
 import java.util.concurrent.Executor;
+import java.util.logging.Logger;

-import javax.annotation.Nullable;
 import javax.annotation.concurrent.Immutable;
 import javax.inject.Inject;
 import javax.net.SocketFactory;

-import static org.briarproject.bramble.util.AndroidUtils.getSupportedArchitectures;
-
@Immutable
@NotNullByDefault
-public class AndroidTorPluginFactory extends TorPluginFactory {
+public class AndroidTorPluginFactory implements DuplexPluginFactory {

+	private static final Logger LOG =
+			Logger.getLogger(AndroidTorPluginFactory.class.getName());
+
+	private static final int MAX_LATENCY = 30 * 1000; // 30 seconds
+	private static final int MAX_IDLE_TIME = 30 * 1000; // 30 seconds
+	private static final int MIN_POLLING_INTERVAL = 60 * 1000; // 1 minute
+	private static final int MAX_POLLING_INTERVAL = 10 * 60 * 1000; // 10 mins
+	private static final double BACKOFF_BASE = 1.2;
+
+	private final Executor ioExecutor, wakefulIoExecutor;
 	private final Application app;
+	private final NetworkManager networkManager;
+	private final LocationUtils locationUtils;
+	private final EventBus eventBus;
+	private final SocketFactory torSocketFactory;
+	private final TorPorts torPorts;
+	private final BackoffFactory backoffFactory;
+	private final ResourceProvider resourceProvider;
+	private final CircumventionProvider circumventionProvider;
+	private final BatteryManager batteryManager;
 	private final AndroidWakeLockManager wakeLockManager;
+	private final Clock clock;
+	private final File torDirectory;

 	@Inject
 	AndroidTorPluginFactory(@IoExecutor Executor ioExecutor,
 			@WakefulIoExecutor Executor wakefulIoExecutor,
+			Application app,
 			NetworkManager networkManager,
 			LocationUtils locationUtils,
 			EventBus eventBus,
 			SocketFactory torSocketFactory,
+			TorPorts torPorts,
+			BackoffFactory backoffFactory,
 			ResourceProvider resourceProvider,
 			CircumventionProvider circumventionProvider,
 			BatteryManager batteryManager,
+			AndroidWakeLockManager wakeLockManager,
 			Clock clock,
-			CryptoComponent crypto,
-			@TorDirectory File torDirectory,
-			@TorSocksPort int torSocksPort,
-			@TorControlPort int torControlPort,
-			Application app,
-			AndroidWakeLockManager wakeLockManager) {
-		super(ioExecutor, wakefulIoExecutor, networkManager, locationUtils,
-				eventBus, torSocketFactory, resourceProvider,
-				circumventionProvider, batteryManager, clock, crypto,
-				torDirectory, torSocksPort, torControlPort);
+			@TorDirectory File torDirectory) {
+		this.ioExecutor = ioExecutor;
+		this.wakefulIoExecutor = wakefulIoExecutor;
 		this.app = app;
+		this.networkManager = networkManager;
+		this.locationUtils = locationUtils;
+		this.eventBus = eventBus;
+		this.torSocketFactory = torSocketFactory;
+		this.torPorts = torPorts;
+		this.backoffFactory = backoffFactory;
+		this.resourceProvider = resourceProvider;
+		this.circumventionProvider = circumventionProvider;
+		this.batteryManager = batteryManager;
 		this.wakeLockManager = wakeLockManager;
+		this.clock = clock;
+		this.torDirectory = torDirectory;
 	}

-	@Nullable
 	@Override
-	String getArchitectureForTorBinary() {
-		for (String abi : getSupportedArchitectures()) {
-			if (abi.startsWith("x86_64")) return "x86_64_pie";
-			else if (abi.startsWith("x86")) return "x86_pie";
-			else if (abi.startsWith("arm64")) return "arm64_pie";
-			else if (abi.startsWith("armeabi")) return "arm_pie";
+	public TransportId getId() {
+		return TorConstants.ID;
+	}
+
+	@Override
+	public long getMaxLatency() {
+		return MAX_LATENCY;
+	}
+
+	@Override
+	public DuplexPlugin createPlugin(PluginCallback callback) {
+
+		// Check that we have a Tor binary for this architecture
+		String architecture = null;
+		for (String abi : AndroidUtils.getSupportedArchitectures()) {
+			if (abi.startsWith("x86_64")) {
+				architecture = "x86_64";
+				break;
+			} else if (abi.startsWith("x86")) {
+				architecture = "x86";
+				break;
+			} else if (abi.startsWith("arm64")) {
+				architecture = "arm64";
+				break;
+			} else if (abi.startsWith("armeabi")) {
+				architecture = "arm";
+				break;
+			}
 		}
-		return null;
-	}
+		if (architecture == null) {
+			LOG.info("Tor is not supported on this architecture");
+			return null;
+		}
+		// Use position-independent executable
+		architecture += "_pie";

-	@Override
-	TorPlugin createPluginInstance(TorRendezvousCrypto torRendezvousCrypto,
-			PluginCallback callback,
-			String architecture) {
-		return new AndroidTorPlugin(ioExecutor,
+		Backoff backoff = backoffFactory.createBackoff(MIN_POLLING_INTERVAL,
+				MAX_POLLING_INTERVAL, BACKOFF_BASE);
+		TorRendezvousCrypto torRendezvousCrypto = new TorRendezvousCryptoImpl();
+		AndroidTorPlugin plugin = new AndroidTorPlugin(ioExecutor,
 				wakefulIoExecutor, app, networkManager, locationUtils,
-				torSocketFactory, clock, resourceProvider,
+				torSocketFactory, torPorts, clock, resourceProvider,
 				circumventionProvider, batteryManager, wakeLockManager,
-				torRendezvousCrypto, callback, architecture,
-				MAX_LATENCY, MAX_IDLE_TIME, torDirectory, torSocksPort,
-				torControlPort);
+				backoff, torRendezvousCrypto, callback, architecture,
+				MAX_LATENCY, MAX_IDLE_TIME, torDirectory);
+		eventBus.addListener(plugin);
+		return plugin;
 	}
 }
--- a/bramble-android/src/main/java/org/briarproject/bramble/system/AndroidTaskScheduler.java
+++ b/bramble-android/src/main/java/org/briarproject/bramble/system/AndroidTaskScheduler.java
@@ -8,7 +8,6 @@ import android.content.Intent;
 import android.os.Process;
 import android.os.SystemClock;

-import org.briarproject.bramble.api.Cancellable;
 import org.briarproject.bramble.api.lifecycle.Service;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.system.AlarmListener;
@@ -117,12 +116,10 @@ class AndroidTaskScheduler implements TaskScheduler, Service, AlarmListener {
 		long dueMillis = now + MILLISECONDS.convert(delay, unit);
 		Runnable wakeful = () ->
 				wakeLockManager.executeWakefully(task, executor, "TaskHandoff");
-		// Acquire the lock before scheduling the check to ensure the check
-		// doesn't access the task queue before the task has been added
-		ScheduledTask s;
+		Future<?> check = scheduleCheckForDueTasks(delay, unit);
+		ScheduledTask s = new ScheduledTask(wakeful, dueMillis, check,
+				cancelled);
 		synchronized (lock) {
-			Future<?> check = scheduleCheckForDueTasks(delay, unit);
-			s = new ScheduledTask(wakeful, dueMillis, check, cancelled);
 			tasks.add(s);
 		}
 		return s;
@@ -139,7 +136,6 @@ class AndroidTaskScheduler implements TaskScheduler, Service, AlarmListener {
 		return schedule(wrapped, executor, delay, unit, cancelled);
 	}

-	@GuardedBy("lock")
 	private Future<?> scheduleCheckForDueTasks(long delay, TimeUnit unit) {
 		Runnable wakeful = () -> wakeLockManager.runWakefully(
 				this::runDueTasks, "TaskScheduler");
@@ -210,7 +206,7 @@ class AndroidTaskScheduler implements TaskScheduler, Service, AlarmListener {
 		private final Future<?> check;
 		private final AtomicBoolean cancelled;

-		private ScheduledTask(Runnable task, long dueMillis,
+		public ScheduledTask(Runnable task, long dueMillis,
 				Future<?> check, AtomicBoolean cancelled) {
 			this.task = task;
 			this.dueMillis = dueMillis;
--- a/bramble-android/src/main/java/org/briarproject/bramble/util/AndroidUtils.java
+++ b/bramble-android/src/main/java/org/briarproject/bramble/util/AndroidUtils.java
@@ -4,7 +4,6 @@ import android.annotation.SuppressLint;
 import android.bluetooth.BluetoothAdapter;
 import android.content.Context;
 import android.os.Build;
-import android.os.Looper;
 import android.provider.Settings;

 import org.briarproject.bramble.api.Pair;
@@ -135,8 +134,4 @@ public class AndroidUtils {
 			return null;
 		}
 	}
-
-	public static boolean isUiThread() {
-		return Looper.myLooper() == Looper.getMainLooper();
-	}
 }
--- a/bramble-android/src/main/res/raw/.gitkeep
+++ b/bramble-android/src/main/res/raw/.gitkeep
--- a/bramble-android/src/test/java/org/briarproject/bramble/account/AndroidAccountManagerTest.java
+++ b/bramble-android/src/test/java/org/briarproject/bramble/account/AndroidAccountManagerTest.java
@@ -9,7 +9,7 @@ import org.briarproject.bramble.api.db.DatabaseConfig;
 import org.briarproject.bramble.api.identity.IdentityManager;
 import org.briarproject.bramble.test.BrambleMockTestCase;
 import org.jmock.Expectations;
-import org.jmock.imposters.ByteBuddyClassImposteriser;
+import org.jmock.lib.legacy.ClassImposteriser;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
@@ -44,7 +44,7 @@ public class AndroidAccountManagerTest extends BrambleMockTestCase {
 	private AndroidAccountManager accountManager;

 	public AndroidAccountManagerTest() {
-		context.setImposteriser(ByteBuddyClassImposteriser.INSTANCE);
+		context.setImposteriser(ClassImposteriser.INSTANCE);
 		app = context.mock(Application.class);
 		applicationInfo = new ApplicationInfo();
 		applicationInfo.dataDir = testDir.getAbsolutePath();
--- a/bramble-android/witness.gradle
+++ b/bramble-android/witness.gradle
@@ -1,50 +1,50 @@
 dependencyVerification {
    verify = [
        'cglib:cglib:3.2.8:cglib-3.2.8.jar:3f64de999ecc5595dc84ca8ff0879d8a34c8623f9ef3c517a53ed59023fcb9db',
-        'com.android.tools.analytics-library:protos:30.0.3:protos-30.0.3.jar:f62b89dcd9de719c6a7b7e15fb1dd20e45b57222e675cf633607bd0ed6bca7e7',
-        'com.android.tools.analytics-library:shared:30.0.3:shared-30.0.3.jar:05aa9ba3cc890354108521fdf99802565aae5dd6ca44a6ac8bb8d594d1c1cd15',
-        'com.android.tools.analytics-library:tracker:30.0.3:tracker-30.0.3.jar:5d0ef35bf6733e96210b5085a2a202152921bf834d345959dce1ca3369b528df',
+        'com.android.tools.analytics-library:protos:27.1.3:protos-27.1.3.jar:0d9e6cff60b318baac250b6f5bb076a8161103338bf2749cdf1db8a5a13a1f12',
+        'com.android.tools.analytics-library:shared:27.1.3:shared-27.1.3.jar:10d2a51d8f89ff4ac849888e5a9c60b10e879c30d78545ec1da4d3df7bd56ae4',
+        'com.android.tools.analytics-library:tracker:27.1.3:tracker-27.1.3.jar:589b355a2ba796cbc0a2b2295737de6661f078262e5f87cd6f540b8d011e5ebb',
        'com.android.tools.build:aapt2-proto:4.1.0-alpha01-6193524:aapt2-proto-4.1.0-alpha01-6193524.jar:17e75523e1e92dd4f222c7368ee41df9e964a508232f591e265d0c499baf9dca',
-        'com.android.tools.build:apksig:7.0.3:apksig-7.0.3.jar:012337a2803c9a30dfc41dcbc6450686ee9e5f582549f7f126479f743a343ec9',
-        'com.android.tools.build:apkzlib:7.0.3:apkzlib-7.0.3.jar:b31e53174c92db83c5cc6e7dac6734ea4e907a72e452c2bf1818dfd082c59397',
-        'com.android.tools.build:builder-model:7.0.3:builder-model-7.0.3.jar:483f99d7494a5bed027e1e8d29111384cf535d4842f0be5a79805bd44bb68d4e',
-        'com.android.tools.build:builder-test-api:7.0.3:builder-test-api-7.0.3.jar:f6de4bc2cef545e8367bf82d7c733829c7be3b0b3b8b09fd8c58f2150e59ab46',
-        'com.android.tools.build:builder:7.0.3:builder-7.0.3.jar:c6952da0094b094c2ba0fe84c675622097c5d9b9f9beb53485b860320540cf1d',
-        'com.android.tools.build:manifest-merger:30.0.3:manifest-merger-30.0.3.jar:72b346ba6318b4b6260e6e49df4bea5da2e12329ab6c2beb2269c49a9f51f178',
-        'com.android.tools.ddms:ddmlib:30.0.3:ddmlib-30.0.3.jar:7a914a68ab93393657297234e2f37b22410ae9a433cba692ce8c727c9607e3bb',
-        'com.android.tools.external.com-intellij:intellij-core:30.0.3:intellij-core-30.0.3.jar:1ebe858d3f58eeaa8c06507f8ac0f1c7051e6c61f35a70f3c3967d5734d3abc5',
-        'com.android.tools.external.com-intellij:kotlin-compiler:30.0.3:kotlin-compiler-30.0.3.jar:ed00e441f427cb4e0d418287b9da30b12b7f735f9af32e6b5d3dc960b6a742fc',
-        'com.android.tools.external.org-jetbrains:uast:30.0.3:uast-30.0.3.jar:a77801bee6ff509910e459525c9c34d7f04b066ade123547f16f1917548eadea',
-        'com.android.tools.layoutlib:layoutlib-api:30.0.3:layoutlib-api-30.0.3.jar:4caa87e9ca2e11315f650d576cd59fec1793373bc3fca3f6d53c029e7534e7c4',
-        'com.android.tools.lint:lint-api:30.0.3:lint-api-30.0.3.jar:bcecbd2f752a6560096a9029a47d1de6bd788a51bab505c5ebfba6a18524b983',
-        'com.android.tools.lint:lint-checks:30.0.3:lint-checks-30.0.3.jar:25a7cd42dc3ad502337f131fb8b7e873c53301db0a67b1c64dd4ae7a8eb66cec',
-        'com.android.tools.lint:lint-gradle:30.0.3:lint-gradle-30.0.3.jar:94544d6147a809bf2fd3440e51f28a4e42e547d74aab53eefd74938cdad42c26',
-        'com.android.tools.lint:lint-model:30.0.3:lint-model-30.0.3.jar:0b940a7f575c2ff5cbd038260f41dde686a93c672213881ead3ce8af3513b396',
-        'com.android.tools.lint:lint:30.0.3:lint-30.0.3.jar:ee4f11001e0c7e3b776e0d67399ad354b19b0f168822ec2b7db47c0910ed227d',
-        'com.android.tools:annotations:30.0.3:annotations-30.0.3.jar:5c1944982fda8555855c4f5422fabf0dc8e2306e1f5460e9ad82dae71316bc31',
-        'com.android.tools:common:30.0.3:common-30.0.3.jar:8751efaaf2c2ddd1f0a37526c794347def6a3057ca9fc510307c13a6cf0d036f',
-        'com.android.tools:dvlib:30.0.3:dvlib-30.0.3.jar:5affafcec390041e5afd64cb924153f5e474db47ee8ccc2f555b495083141233',
-        'com.android.tools:repository:30.0.3:repository-30.0.3.jar:0a40c6f16c506903ce2c609affd8228aceda73a69d93dfa42d4f02b8491449f6',
-        'com.android.tools:sdk-common:30.0.3:sdk-common-30.0.3.jar:b45570a380360236ffee0f6bb593d66b673bad3834dfe0d6c9871fa7188ee0eb',
-        'com.android.tools:sdklib:30.0.3:sdklib-30.0.3.jar:7088f20a414fab170a21e457825e14ebe099f753558e02c8acc12c67eb412162',
-        'com.android:signflinger:7.0.3:signflinger-7.0.3.jar:903a4536db3e96b4e1e1dc1e400eb0b91bf7866d9b39cd7ec94d75dde158f152',
-        'com.android:zipflinger:7.0.3:zipflinger-7.0.3.jar:fd209c960a3eff7a339e6fcba07d5e9ef4604d1633c69ab2df987460d9804140',
-        'com.beust:jcommander:1.78:jcommander-1.78.jar:7891debb84b5f83e9bd57593ebece3399abbe0fd938cf306b3534c57913b9615',
-        'com.github.javaparser:javaparser-core:3.17.0:javaparser-core-3.17.0.jar:23f5c982e1c7771423d37d52c774e8d2e80fd7ea7305ebe448797a96f67e6fca',
+        'com.android.tools.build:apksig:4.1.3:apksig-4.1.3.jar:a851980c678ff7a6785388b9a9e8cc094788ce3c4a985ad2b19c2028fd3c631a',
+        'com.android.tools.build:apkzlib:4.1.3:apkzlib-4.1.3.jar:475903065e7e83a8c1ba78d267c97a54dc5a04d768b535093850423d7b11f2c8',
+        'com.android.tools.build:builder-model:4.1.3:builder-model-4.1.3.jar:2624a1436c3ab39dd91d3ecf9409a594b0f89ea5cab255f2e9ff11f5ee03d274',
+        'com.android.tools.build:builder-test-api:4.1.3:builder-test-api-4.1.3.jar:3d2af66726b06b53b8d6d497efcee39ff9f77eb2f8d2cce38b31502383a40d2c',
+        'com.android.tools.build:builder:4.1.3:builder-4.1.3.jar:a40426cd6d68f6a722ef4950058c075e4547025e8c2fd78e732ad89f15176f84',
+        'com.android.tools.build:gradle-api:4.1.3:gradle-api-4.1.3.jar:11b1fb9de658bdcf9290b1c1517060d0c4d93f2b27975934989ca4ac890bc077',
+        'com.android.tools.build:manifest-merger:27.1.3:manifest-merger-27.1.3.jar:ce8d4009b1f1584777a7ffa1da3b0551dc316bc8e08112e442c352af70f46f2d',
+        'com.android.tools.ddms:ddmlib:27.1.3:ddmlib-27.1.3.jar:8f76e8236d2b9eebf26378746dad025c4c7c056a02e133dae4ddef47b283c710',
+        'com.android.tools.external.com-intellij:intellij-core:27.1.3:intellij-core-27.1.3.jar:652814fa099b4746fb6f10e19718e476952e8b5bac24e17d914f90650ad21808',
+        'com.android.tools.external.com-intellij:kotlin-compiler:27.1.3:kotlin-compiler-27.1.3.jar:8d7a78d5efd213c5e467e42bd205582aad73ffc77ee5dc18eb1361c9af72f125',
+        'com.android.tools.external.org-jetbrains:uast:27.1.3:uast-27.1.3.jar:aea53944a1ac6a05f12297b55290e8cbecfe54c4166260cfba4405823bfe1c78',
+        'com.android.tools.layoutlib:layoutlib-api:27.1.3:layoutlib-api-27.1.3.jar:23875ce0a8429f33a4e86cc358f658faa0ba9c576f5f05760e544b453d67d04b',
+        'com.android.tools.lint:lint-api:27.1.3:lint-api-27.1.3.jar:97666be32bcadacd944416ea334a9575ef8f4ad0c8f333151491ff4a7df43e1c',
+        'com.android.tools.lint:lint-checks:27.1.3:lint-checks-27.1.3.jar:b2d71ae84a31490fe9ff26c706163fe245b2aea98e3eb747214c1085df444708',
+        'com.android.tools.lint:lint-gradle-api:27.1.3:lint-gradle-api-27.1.3.jar:e54131c287a2954e6ed78a3351e5e10e35a1da2f09ac443bf44b705c71b63a4d',
+        'com.android.tools.lint:lint-gradle:27.1.3:lint-gradle-27.1.3.jar:6a79e48943649d63665db7b17dbaff7af93e94ab9b15072f1a4d90486294ee9f',
+        'com.android.tools.lint:lint-model:27.1.3:lint-model-27.1.3.jar:acb9e792db7000e38e3c3ca21a9b14f2de6549d7a3fc92a97ffba3d06345e5bf',
+        'com.android.tools.lint:lint:27.1.3:lint-27.1.3.jar:5a2e69d0901a3a476a5b2d5001de755868113145f5f6aa557750cfad5389a44b',
+        'com.android.tools:annotations:27.1.3:annotations-27.1.3.jar:904dd771883496d5dfc86619ab2555968ea4e8a29d7a5f4f7cae6fbf5429f8f5',
+        'com.android.tools:common:27.1.3:common-27.1.3.jar:17ab4728e3ea50f047dd5937f0faf35f2c5416962ed74891057087ddc328bf96',
+        'com.android.tools:dvlib:27.1.3:dvlib-27.1.3.jar:cead1c0c356cbe43e6855b0330fe09ef4bec2c72e22bdb4c6e7cf7e6b1dfbc37',
+        'com.android.tools:repository:27.1.3:repository-27.1.3.jar:99de1a178855b56b8cd91a56296f1e0a9399c445e6acc51f1d2927947cc472cb',
+        'com.android.tools:sdk-common:27.1.3:sdk-common-27.1.3.jar:b591e2aa0f1be600795f5c9e2bf81cba9b052bee452fc86c3362b5dd9e427a14',
+        'com.android.tools:sdklib:27.1.3:sdklib-27.1.3.jar:ad6c08a45fe2904d05656bdddf9f623fa5c1d16bbd7b8d6a270a0734136ae02e',
+        'com.android:signflinger:4.1.3:signflinger-4.1.3.jar:f3103b55ccdc8dd9ee2517eb26af93b904d41303726594372d0df59d51156e5c',
+        'com.android:zipflinger:4.1.3:zipflinger-4.1.3.jar:48569896c0497268308a8014c66eb0f2bace2b9e2fc9390f3012823fb86387d5',
        'com.google.code.findbugs:annotations:3.0.1:annotations-3.0.1.jar:6b47ff0a6de0ce17cbedc3abb0828ca5bce3009d53ea47b3723ff023c4742f79',
        'com.google.code.findbugs:jsr305:3.0.2:jsr305-3.0.2.jar:766ad2a0783f2687962c8ad74ceecc38a28b9f72a2d085ee438b7813e928d0c7',
-        'com.google.code.gson:gson:2.8.6:gson-2.8.6.jar:c8fb4839054d280b3033f800d1f5a97de2f028eb8ba2eb458ad287e536f3f25f',
+        'com.google.code.gson:gson:2.8.5:gson-2.8.5.jar:233a0149fc365c9f6edbd683cfe266b19bdc773be98eabdaf6b3c924b48e7d81',
        'com.google.dagger:dagger-compiler:2.33:dagger-compiler-2.33.jar:aa8a0d8370c578fd6999802d0d90b9829377a46d2c1141e11b8f737970e7155e',
        'com.google.dagger:dagger-producers:2.33:dagger-producers-2.33.jar:5897f0b6eef799c2adfe3ccacc58c0fb374d58acb063c3ebe5366c38a8bce5c8',
        'com.google.dagger:dagger-spi:2.33:dagger-spi-2.33.jar:e2dcab2221b8afb9556ef0a1c83b0bd5f42552e254322a257330f754cdbbb9d4',
        'com.google.dagger:dagger:2.33:dagger-2.33.jar:d8798c5b8cf6b125234e33af5c6293bb9f2208ce29b57924c35b8c0be7b6bdcb',
        'com.google.errorprone:error_prone_annotations:2.2.0:error_prone_annotations-2.2.0.jar:6ebd22ca1b9d8ec06d41de8d64e0596981d9607b42035f9ed374f9de271a481a',
-        'com.google.errorprone:error_prone_annotations:2.3.4:error_prone_annotations-2.3.4.jar:baf7d6ea97ce606c53e11b6854ba5f2ce7ef5c24dddf0afa18d1260bd25b002c',
+        'com.google.errorprone:error_prone_annotations:2.3.2:error_prone_annotations-2.3.2.jar:357cd6cfb067c969226c442451502aee13800a24e950fdfde77bcdb4565a668d',
        'com.google.errorprone:javac-shaded:9-dev-r4023-3:javac-shaded-9-dev-r4023-3.jar:65bfccf60986c47fbc17c9ebab0be626afc41741e0a6ec7109e0768817a36f30',
        'com.google.googlejavaformat:google-java-format:1.5:google-java-format-1.5.jar:aa19ad7850fb85178aa22f2fddb163b84d6ce4d0035872f30d4408195ca1144e',
        'com.google.guava:failureaccess:1.0.1:failureaccess-1.0.1.jar:a171ee4c734dd2da837e4b16be9df4661afab72a41adaf31eb84dfdaf936ca26',
        'com.google.guava:guava:27.1-jre:guava-27.1-jre.jar:4a5aa70cc968a4d137e599ad37553e5cfeed2265e8c193476d7119036c536fe7',
-        'com.google.guava:guava:30.1-jre:guava-30.1-jre.jar:e6dd072f9d3fe02a4600688380bd422bdac184caf6fe2418cfdd0934f09432aa',
+        'com.google.guava:guava:28.1-jre:guava-28.1-jre.jar:30beb8b8527bd07c6e747e77f1a92122c2f29d57ce347461a4a55eb26e382da4',
        'com.google.guava:listenablefuture:9999.0-empty-to-avoid-conflict-with-guava:listenablefuture-9999.0-empty-to-avoid-conflict-with-guava.jar:b372a037d4230aa57fbeffdef30fd6123f9c0c2db85d0aced00c91b974f33f99',
        'com.google.j2objc:j2objc-annotations:1.1:j2objc-annotations-1.1.jar:2994a7eb78f2710bd3d3bfb639b2c94e219cedac0d4d084d516e78c16dddecf6',
        'com.google.j2objc:j2objc-annotations:1.3:j2objc-annotations-1.3.jar:21af30c92267bd6122c0e0b4d20cccb6641a37eaf956c6540ec471d584e64a7b',
@@ -54,108 +54,63 @@ dependencyVerification {
        'com.squareup:javapoet:1.13.0:javapoet-1.13.0.jar:4c7517e848a71b36d069d12bb3bf46a70fd4cda3105d822b0ed2e19c00b69291',
        'com.squareup:javawriter:2.5.0:javawriter-2.5.0.jar:fcfb09fb0ea0aa97d3cfe7ea792398081348e468f126b3603cb3803f240197f0',
        'com.sun.activation:javax.activation:1.2.0:javax.activation-1.2.0.jar:993302b16cd7056f21e779cc577d175a810bb4900ef73cd8fbf2b50f928ba9ce',
-        'com.sun.istack:istack-commons-runtime:3.0.8:istack-commons-runtime-3.0.8.jar:4ffabb06be454a05e4398e20c77fa2b6308d4b88dfbef7ca30a76b5b7d5505ef',
-        'com.sun.xml.fastinfoset:FastInfoset:1.2.16:FastInfoset-1.2.16.jar:056f3a1e144409f21ed16afc26805f58e9a21f3fce1543c42d400719d250c511',
-        'com.thoughtworks.qdox:qdox:1.12.1:qdox-1.12.1.jar:21fba22f830e9268f07cf4ab2d99e8181abbdcb0cb91ee0228eb3cb918dcdd1d',
+        'com.sun.istack:istack-commons-runtime:3.0.7:istack-commons-runtime-3.0.7.jar:6443e10ba2e259fb821d9b6becf10db5316285fc30c53cec9d7b19a3877e7fdf',
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-        'org.junit.platform:junit-platform-engine:1.7.0:junit-platform-engine-1.7.0.jar:75f21a20dc594afdc875736725b408cec6d0344874d29f34b2dd3075500236f2',
-        'org.junit.platform:junit-platform-launcher:1.7.0:junit-platform-launcher-1.7.0.jar:fbdc748fde4c4279fe1d3c607447cb3b7ccd45d7338fc574f8a894ddf2d16818',
-        'org.jvnet.staxex:stax-ex:1.8.1:stax-ex-1.8.1.jar:20522549056e9e50aa35ef0b445a2e47a53d06be0b0a9467d704e2483ffb049a',
+        'org.jvnet.staxex:stax-ex:1.8:stax-ex-1.8.jar:95b05d9590af4154c6513b9c5dc1fb2e55b539972ba0a9ef28e9a0c01d83ad77',
        'org.objenesis:objenesis:3.0.1:objenesis-3.0.1.jar:7a8ff780b9ff48415d7c705f60030b0acaa616e7f823c98eede3b63508d4e984',
-        'org.opentest4j:opentest4j:1.2.0:opentest4j-1.2.0.jar:58812de60898d976fb81ef3b62da05c6604c18fd4a249f5044282479fc286af2',
        'org.ow2.asm:asm-analysis:7.0:asm-analysis-7.0.jar:e981f8f650c4d900bb033650b18e122fa6b161eadd5f88978d08751f72ee8474',
        'org.ow2.asm:asm-commons:7.0:asm-commons-7.0.jar:fed348ef05958e3e846a3ac074a12af5f7936ef3d21ce44a62c4fa08a771927d',
        'org.ow2.asm:asm-tree:7.0:asm-tree-7.0.jar:cfd7a0874f9de36a999c127feeadfbfe6e04d4a71ee954d7af3d853f0be48a6c',
        'org.ow2.asm:asm-util:7.0:asm-util-7.0.jar:75fbbca440ef463f41c2b0ab1a80abe67e910ac486da60a7863cbcb5bae7e145',
        'org.ow2.asm:asm:7.0:asm-7.0.jar:b88ef66468b3c978ad0c97fd6e90979e56155b4ac69089ba7a44e9aa7ffe9acf',
        'org.ow2.asm:asm:7.1:asm-7.1.jar:4ab2fa2b6d2cc9ccb1eaa05ea329c407b47b13ed2915f62f8c4b8cc96258d4de',
-        'org.testng:testng:7.3.0:testng-7.3.0.jar:63727488f9717d57f0d0a0fee5a1fc10a2be9cfcff2ec3a7187656d663c0774e',
-        'xerces:xercesImpl:2.12.0:xercesImpl-2.12.0.jar:b50d3a4ca502faa4d1c838acb8aa9480446953421f7327e338c5dda3da5e76d0',
-        'xml-apis:xml-apis:1.4.01:xml-apis-1.4.01.jar:a840968176645684bb01aed376e067ab39614885f9eee44abe35a5f20ebe7fad',
    ]
 }
--- a/bramble-api/build.gradle
+++ b/bramble-api/build.gradle
@@ -9,11 +9,11 @@ apply from: 'witness.gradle'
 dependencies {
 	implementation "com.google.dagger:dagger:$dagger_version"
 	implementation 'com.google.code.findbugs:jsr305:3.0.2'
-	implementation "com.fasterxml.jackson.core:jackson-annotations:$jackson_version"

 	testImplementation "junit:junit:$junit_version"
 	testImplementation "org.jmock:jmock:$jmock_version"
 	testImplementation "org.jmock:jmock-junit4:$jmock_version"
+	testImplementation "org.jmock:jmock-legacy:$jmock_version"

 	signature 'org.codehaus.mojo.signature:java16:1.1@signature'
 }
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/Cancellable.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/Cancellable.java
@@ -1,6 +0,0 @@
-package org.briarproject.bramble.api;
-
-public interface Cancellable {
-
-	void cancel();
-}
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/FeatureFlags.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/FeatureFlags.java
@@ -11,11 +11,7 @@ public interface FeatureFlags {

 	boolean shouldEnableDisappearingMessages();

-	boolean shouldEnableMailbox();
+	boolean shouldEnableTransferData();

-	boolean shouldEnablePrivateGroupsInCore();
-
-	boolean shouldEnableForumsInCore();
-
-	boolean shouldEnableBlogsInCore();
+	boolean shouldEnableShareAppViaOfflineHotspot();
 }
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/StringMap.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/StringMap.java
@@ -1,14 +1,8 @@
 package org.briarproject.bramble.api;

-import org.briarproject.bramble.util.StringUtils;
-
-import java.util.ArrayList;
 import java.util.Hashtable;
-import java.util.List;
 import java.util.Map;

-import javax.annotation.Nullable;
-
 public abstract class StringMap extends Hashtable<String, String> {

 	protected StringMap(Map<String, String> m) {
@@ -58,31 +52,4 @@ public abstract class StringMap extends Hashtable<String, String> {
 	public void putLong(String key, long value) {
 		put(key, String.valueOf(value));
 	}
-
-	@Nullable
-	public int[] getIntArray(String key) {
-		String s = get(key);
-		if (s == null) return null;
-		// Handle empty string because "".split(",") returns {""}
-		if (s.length() == 0) return new int[0];
-		String[] intStrings = s.split(",");
-		int[] ints = new int[intStrings.length];
-		try {
-			for (int i = 0; i < ints.length; i++) {
-				ints[i] = Integer.parseInt(intStrings[i]);
-			}
-		} catch (NumberFormatException e) {
-			return null;
-		}
-		return ints;
-	}
-
-	public void putIntArray(String key, int[] value) {
-		List<String> intStrings = new ArrayList<>();
-		for (int integer : value) {
-			intStrings.add(String.valueOf(integer));
-		}
-		// Puts empty string if input array value is empty
-		put(key, StringUtils.join(intStrings, ","));
-	}
 }
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/UniqueId.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/UniqueId.java
@@ -6,14 +6,14 @@ import javax.annotation.concurrent.ThreadSafe;

@ThreadSafe
@NotNullByDefault
-public class UniqueId extends Bytes {
+public abstract class UniqueId extends Bytes {

 	/**
 	 * The length of a unique identifier in bytes.
 	 */
 	public static final int LENGTH = 32;

-	public UniqueId(byte[] id) {
+	protected UniqueId(byte[] id) {
 		super(id);
 		if (id.length != LENGTH) throw new IllegalArgumentException();
 	}
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/WeakSingletonProvider.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/WeakSingletonProvider.java
@@ -1,35 +0,0 @@
-package org.briarproject.bramble.api;
-
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-
-import java.lang.ref.WeakReference;
-
-import javax.annotation.concurrent.GuardedBy;
-import javax.inject.Provider;
-
-/**
- * A {@link Provider} that keeps a {@link WeakReference} to the last provided
- * instance and provides the same instance again until the instance is garbage
- * collected.
- */
-@NotNullByDefault
-public abstract class WeakSingletonProvider<T> implements Provider<T> {
-
-	private final Object lock = new Object();
-	@GuardedBy("lock")
-	private WeakReference<T> ref = new WeakReference<>(null);
-
-	@Override
-	public T get() {
-		synchronized (lock) {
-			T instance = ref.get();
-			if (instance == null) {
-				instance = createInstance();
-				ref = new WeakReference<>(instance);
-			}
-			return instance;
-		}
-	}
-
-	public abstract T createInstance();
-}
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/client/ClientHelper.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/client/ClientHelper.java
@@ -9,8 +9,6 @@ import org.briarproject.bramble.api.data.BdfList;
 import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.db.Transaction;
 import org.briarproject.bramble.api.identity.Author;
-import org.briarproject.bramble.api.mailbox.MailboxUpdate;
-import org.briarproject.bramble.api.mailbox.MailboxVersion;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.TransportId;
 import org.briarproject.bramble.api.properties.TransportProperties;
@@ -20,7 +18,6 @@ import org.briarproject.bramble.api.sync.MessageId;

 import java.security.GeneralSecurityException;
 import java.util.Collection;
-import java.util.List;
 import java.util.Map;

@NotNullByDefault
@@ -126,25 +123,12 @@ public interface ClientHelper {
 	Map<TransportId, TransportProperties> parseAndValidateTransportPropertiesMap(
 			BdfDictionary properties) throws FormatException;

-	/**
-	 * Parse and validate the elements of a Mailbox update message.
-	 *
-	 * @return the parsed update message
-	 * @throws FormatException if the message elements are invalid
-	 */
-	MailboxUpdate parseAndValidateMailboxUpdate(BdfList clientSupports,
-			BdfList serverSupports, BdfDictionary properties)
-			throws FormatException;
-
-	List<MailboxVersion> parseMailboxVersionList(BdfList bdfList)
-			throws FormatException;
-
 	/**
 	 * Retrieves the contact ID from the group metadata of the given contact
 	 * group.
 	 */
 	ContactId getContactId(Transaction txn, GroupId contactGroupId)
-			throws DbException;
+			throws DbException, FormatException;

 	/**
 	 * Stores the given contact ID in the group metadata of the given contact
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/connection/ConnectionManager.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/connection/ConnectionManager.java
@@ -16,17 +16,6 @@ public interface ConnectionManager {
 	 */
 	void manageIncomingConnection(TransportId t, TransportConnectionReader r);

-	/**
-	 * Manages an incoming connection from a contact via a mailbox.
-	 * <p>
-	 * This method does not mark the tag as recognised until after the data
-	 * has been read from the {@link TransportConnectionReader}, at which
-	 * point the {@link TagController} is called to decide whether the tag
-	 * should be marked as recognised.
-	 */
-	void manageIncomingConnection(TransportId t, TransportConnectionReader r,
-			TagController c);
-
 	/**
 	 * Manages an incoming connection from a contact over a duplex transport.
 	 */
@@ -57,21 +46,4 @@ public interface ConnectionManager {
 	 */
 	void manageOutgoingConnection(PendingContactId p, TransportId t,
 			DuplexTransportConnection d);
-
-	/**
-	 * An interface for controlling whether a tag should be marked as
-	 * recognised.
-	 */
-	interface TagController {
-		/**
-		 * This method is only called if a tag was read from the corresponding
-		 * {@link TransportConnectionReader} and recognised.
-		 *
-		 * @param exception True if an exception was thrown while reading from
-		 * the {@link TransportConnectionReader}, after successfully reading
-		 * and recognising the tag.
-		 * @return True if the tag should be marked as recognised.
-		 */
-		boolean shouldMarkTagAsRecognised(boolean exception);
-	}
 }
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/contact/ContactManager.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/contact/ContactManager.java
@@ -107,32 +107,6 @@ public interface ContactManager {
 	 */
 	String getHandshakeLink() throws DbException;

-	/**
-	 * Returns the handshake link that needs to be sent to a contact we want
-	 * to add.
-	 */
-	String getHandshakeLink(Transaction txn) throws DbException;
-
-	/**
-	 * Creates a {@link PendingContact} from the given handshake link and
-	 * alias, adds it to the database and returns it.
-	 *
-	 * @param link The handshake link received from the pending contact
-	 * @param alias The alias the user has given this pending contact
-	 * @throws UnsupportedVersionException If the link uses a format version
-	 * that is not supported
-	 * @throws FormatException If the link is invalid
-	 * @throws GeneralSecurityException If the pending contact's handshake
-	 * public key is invalid
-	 * @throws ContactExistsException If a contact with the same handshake
-	 * public key already exists
-	 * @throws PendingContactExistsException If a pending contact with the same
-	 * handshake public key already exists
-	 */
-	PendingContact addPendingContact(Transaction txn, String link, String alias)
-			throws DbException, FormatException, GeneralSecurityException,
-			ContactExistsException, PendingContactExistsException;
-
 	/**
 	 * Creates a {@link PendingContact} from the given handshake link and
 	 * alias, adds it to the database and returns it.
@@ -166,24 +140,11 @@ public interface ContactManager {
 	Collection<Pair<PendingContact, PendingContactState>> getPendingContacts()
 			throws DbException;

-	/**
-	 * Returns a list of {@link PendingContact PendingContacts} and their
-	 * {@link PendingContactState states}.
-	 */
-	Collection<Pair<PendingContact, PendingContactState>> getPendingContacts(Transaction txn)
-			throws DbException;
-
 	/**
 	 * Removes a {@link PendingContact}.
 	 */
 	void removePendingContact(PendingContactId p) throws DbException;

-	/**
-	 * Removes a {@link PendingContact}.
-	 */
-	void removePendingContact(Transaction txn, PendingContactId p)
-			throws DbException;
-
 	/**
 	 * Returns the contact with the given ID.
 	 */
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/contact/PendingContactId.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/contact/PendingContactId.java
@@ -3,6 +3,7 @@ package org.briarproject.bramble.api.contact;
 import org.briarproject.bramble.api.UniqueId;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;

+import javax.annotation.Nullable;
 import javax.annotation.concurrent.ThreadSafe;

 /**
@@ -16,4 +17,9 @@ public class PendingContactId extends UniqueId {
 	public PendingContactId(byte[] id) {
 		super(id);
 	}
+
+	@Override
+	public boolean equals(@Nullable Object o) {
+		return o instanceof PendingContactId && super.equals(o);
+	}
 }
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/crypto/CryptoComponent.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/crypto/CryptoComponent.java
@@ -1,6 +1,5 @@
 package org.briarproject.bramble.api.crypto;

-import org.briarproject.bramble.api.UniqueId;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;

 import java.security.GeneralSecurityException;
@@ -11,8 +10,6 @@ import javax.annotation.Nullable;
@NotNullByDefault
 public interface CryptoComponent {

-	UniqueId generateUniqueId();
-
 	SecretKey generateSecretKey();

 	SecureRandom getSecureRandom();
@@ -173,13 +170,4 @@ public interface CryptoComponent {
 	 * length. The line terminator is CRLF.
 	 */
 	String asciiArmour(byte[] b, int lineLength);
-
-	/**
-	 * Encode the Onion given its public key. Specified here:
-	 * https://gitweb.torproject.org/torspec.git/tree/rend-spec-v3.txt?id=29245fd5#n2135
-	 *
-	 * @return the encoded onion, base32 chars
-	 */
-	String encodeOnion(byte[] publicKey);
-
 }
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/db/DatabaseComponent.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/db/DatabaseComponent.java
@@ -33,18 +33,11 @@ import java.util.List;
 import java.util.Map;

 import javax.annotation.Nullable;
-import javax.annotation.concurrent.ThreadSafe;

 /**
 * Encapsulates the database implementation and exposes high-level operations
 * to other components.
- * <p>
- * With the exception of the {@link #open(SecretKey, MigrationListener)} and
- * {@link #close()} methods, which must not be called concurrently, the
- * database can be accessed from any thread. See {@link TransactionManager}
- * for locking behaviour.
 */
-@ThreadSafe
@NotNullByDefault
 public interface DatabaseComponent extends TransactionManager {

@@ -200,15 +193,26 @@ public interface DatabaseComponent extends TransactionManager {
 			throws DbException;

 	/**
-	 * Returns a batch of messages for the given contact, for transmission over
-	 * a transport with the given maximum latency. The total length of the
-	 * messages, including record headers, will be no more than the given
-	 * capacity. Returns null if there are no sendable messages that would fit
-	 * in the given capacity.
+	 * Returns a batch of messages for the given contact, with a total length
+	 * less than or equal to the given length, for transmission over a
+	 * transport with the given maximum latency. Returns null if there are no
+	 * sendable messages that fit in the given length.
 	 */
 	@Nullable
 	Collection<Message> generateBatch(Transaction txn, ContactId c,
-			long capacity, long maxLatency) throws DbException;
+			int maxLength, long maxLatency) throws DbException;
+
+	/**
+	 * Returns a batch of messages for the given contact containing the
+	 * messages with the given IDs, for transmission over a transport with
+	 * the given maximum latency.
+	 * <p/>
+	 * If any of the given messages are not in the database or are not visible
+	 * to the contact, they are omitted from the batch without throwing an
+	 * exception.
+	 */
+	Collection<Message> generateBatch(Transaction txn, ContactId c,
+			Collection<MessageId> ids, long maxLatency) throws DbException;

 	/**
 	 * Returns an offer for the given contact for transmission over a
@@ -228,16 +232,15 @@ public interface DatabaseComponent extends TransactionManager {
 			throws DbException;

 	/**
-	 * Returns a batch of messages for the given contact, for transmission over
-	 * a transport with the given maximum latency. Only messages that have been
-	 * requested by the contact are returned. The total length of the messages,
-	 * including record headers, will be no more than the given capacity.
-	 * Returns null if there are no sendable messages that have been requested
-	 * by the contact and would fit in the given capacity.
+	 * Returns a batch of messages for the given contact, with a total length
+	 * less than or equal to the given length, for transmission over a
+	 * transport with the given maximum latency. Only messages that have been
+	 * requested by the contact are returned. Returns null if there are no
+	 * sendable messages that fit in the given length.
 	 */
 	@Nullable
 	Collection<Message> generateRequestedBatch(Transaction txn, ContactId c,
-			long capacity, long maxLatency) throws DbException;
+			int maxLength, long maxLatency) throws DbException;

 	/**
 	 * Returns the contact with the given ID.
@@ -341,30 +344,6 @@ public interface DatabaseComponent extends TransactionManager {
 	Collection<MessageId> getMessageIds(Transaction txn, GroupId g,
 			Metadata query) throws DbException;

-	/**
-	 * Returns the IDs of some messages received from the given contact that
-	 * need to be acknowledged, up to the given number of messages.
-	 * <p/>
-	 * Read-only.
-	 */
-	Collection<MessageId> getMessagesToAck(Transaction txn, ContactId c,
-			int maxMessages) throws DbException;
-
-	/**
-	 * Returns the IDs of some messages that are eligible to be sent to the
-	 * given contact over a transport with the given maximum latency. The total
-	 * length of the messages including record headers will be no more than the
-	 * given capacity.
-	 * <p/>
-	 * Unlike {@link #getUnackedMessagesToSend(Transaction, ContactId)} this
-	 * method does not return messages that have already been sent unless they
-	 * are due for retransmission.
-	 * <p/>
-	 * Read-only.
-	 */
-	Collection<MessageId> getMessagesToSend(Transaction txn, ContactId c,
-			long capacity, long maxLatency) throws DbException;
-
 	/**
 	 * Returns the IDs of any messages that need to be validated.
 	 * <p/>
@@ -481,40 +460,17 @@ public interface DatabaseComponent extends TransactionManager {
 	MessageStatus getMessageStatus(Transaction txn, ContactId c, MessageId m)
 			throws DbException;

-	/**
-	 * Returns the message with the given ID for transmission to the given
-	 * contact over a transport with the given maximum latency. Returns null
-	 * if the message is no longer visible to the contact.
-	 *
-	 * @param markAsSent True if the message should be marked as sent.
-	 * If false it can be marked as sent by calling
-	 * {@link #setMessagesSent(Transaction, ContactId, Collection, long)}.
-	 */
-	@Nullable
-	Message getMessageToSend(Transaction txn, ContactId c, MessageId m,
-			long maxLatency, boolean markAsSent) throws DbException;
-
 	/**
 	 * Returns the IDs of all messages that are eligible to be sent to the
-	 * given contact.
-	 * <p>
-	 * Unlike {@link #getMessagesToSend(Transaction, ContactId, long, long)}
-	 * this method may return messages that have already been sent and are
-	 * not yet due for retransmission.
+	 * given contact, together with their raw lengths. This may include
+	 * messages that have already been sent and are not yet due for
+	 * retransmission.
 	 * <p/>
 	 * Read-only.
 	 */
-	Collection<MessageId> getUnackedMessagesToSend(Transaction txn,
+	Map<MessageId, Integer> getUnackedMessagesToSend(Transaction txn,
 			ContactId c) throws DbException;

-	/**
-	 * Resets the transmission count, expiry time and max latency of all messages
-	 * that are eligible to be sent to the given contact. This includes messages
-	 * that have already been sent and are not yet due for retransmission.
-	 */
-	void resetUnackedMessagesToSend(Transaction txn, ContactId c)
-			throws DbException;
-
 	/**
 	 * Returns the total length, including headers, of all messages that are
 	 * eligible to be sent to the given contact. This may include messages
@@ -684,13 +640,6 @@ public interface DatabaseComponent extends TransactionManager {
 	void removeTransportKeys(Transaction txn, TransportId t, KeySetId k)
 			throws DbException;

-	/**
-	 * Records an ack for the given messages as having been sent to the given
-	 * contact.
-	 */
-	void setAckSent(Transaction txn, ContactId c, Collection<MessageId> acked)
-			throws DbException;
-
 	/**
 	 * Sets the cleanup timer duration for the given message. This does not
 	 * start the message's cleanup timer.
@@ -737,13 +686,6 @@ public interface DatabaseComponent extends TransactionManager {
 	void setMessageState(Transaction txn, MessageId m, MessageState state)
 			throws DbException;

-	/**
-	 * Records the given messages as having been sent to the given contact
-	 * over a transport with the given maximum latency.
-	 */
-	void setMessagesSent(Transaction txn, ContactId c,
-			Collection<MessageId> sent, long maxLatency) throws DbException;
-
 	/**
 	 * Adds dependencies for a message
 	 */
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/db/DatabaseExecutor.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/db/DatabaseExecutor.java
@@ -18,10 +18,6 @@ import static java.lang.annotation.RetentionPolicy.RUNTIME;
 * submitted, tasks are not run concurrently, and submitting a task will never
 * block. Tasks must not run indefinitely. Tasks submitted during shutdown are
 * discarded.
- * <p>
- * It is not mandatory to use this executor for database tasks. The database
- * can be accessed from any thread, but this executor's guarantee that tasks
- * are run in the order they're submitted may be useful in some cases.
 */
@Qualifier
@Target({FIELD, METHOD, PARAMETER})
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/db/Transaction.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/db/Transaction.java
@@ -45,9 +45,6 @@ public class Transaction {
 	/**
 	 * Attaches an event to be broadcast when the transaction has been
 	 * committed. The event will be broadcast on the {@link EventExecutor}.
-	 * Events and {@link #attach(Runnable) tasks} are submitted to the
-	 * {@link EventExecutor} in the order they were attached to the
-	 * transaction.
 	 */
 	public void attach(Event e) {
 		if (actions == null) actions = new ArrayList<>();
@@ -57,9 +54,6 @@ public class Transaction {
 	/**
 	 * Attaches a task to be executed when the transaction has been
 	 * committed. The task will be run on the {@link EventExecutor}.
-	 * {@link #attach(Event) Events} and tasks are submitted to the
-	 * {@link EventExecutor} in the order they were attached to the
-	 * transaction.
 	 */
 	public void attach(Runnable r) {
 		if (actions == null) actions = new ArrayList<>();
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/db/TransactionManager.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/db/TransactionManager.java
@@ -1,95 +1,51 @@
 package org.briarproject.bramble.api.db;

-import org.briarproject.bramble.api.event.EventExecutor;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;

 import javax.annotation.Nullable;
-import javax.annotation.concurrent.ThreadSafe;

-/**
- * An interface for managing database transactions.
- * <p>
- * Read-only transactions may access the database concurrently. Read-write
- * transactions access the database exclusively, so starting a read-only or
- * read-write transaction will block until there are no read-write
- * transactions in progress.
- * <p>
- * Failing to {@link #endTransaction(Transaction) end} a transaction will
- * prevent other callers from accessing the database, so it is recommended to
- * use the {@link #transaction(boolean, DbRunnable)},
- * {@link #transactionWithResult(boolean, DbCallable)} and
- * {@link #transactionWithNullableResult(boolean, NullableDbCallable)} methods
- * where possible, which handle committing or aborting the transaction on the
- * caller's behalf.
- * <p>
- * Transactions are not reentrant, i.e. it is not permitted to start a
- * transaction on a thread that already has a transaction in progress.
- */
-@ThreadSafe
@NotNullByDefault
 public interface TransactionManager {

 	/**
-	 * Starts a new transaction and returns an object representing it. This
-	 * method acquires the database lock, which is held until
-	 * {@link #endTransaction(Transaction)} is called.
+	 * Starts a new transaction and returns an object representing it.
+	 * <p/>
+	 * This method acquires locks, so it must not be called while holding a
+	 * lock.
 	 *
-	 * @param readOnly True if the transaction will only be used for reading,
-	 * in which case the database lock can be shared with other read-only
-	 * transactions.
+	 * @param readOnly true if the transaction will only be used for reading.
 	 */
 	Transaction startTransaction(boolean readOnly) throws DbException;

 	/**
 	 * Commits a transaction to the database.
-	 * {@link #endTransaction(Transaction)} must be called to release the
-	 * database lock.
 	 */
 	void commitTransaction(Transaction txn) throws DbException;

 	/**
-	 * Ends a transaction. If the transaction has not been committed by
-	 * calling {@link #commitTransaction(Transaction)}, it is aborted and the
-	 * database lock is released.
-	 * <p>
-	 * If the transaction has been committed, any
-	 * {@link Transaction#attach events} attached to the transaction are
-	 * broadcast and any {@link Transaction#attach(Runnable) tasks} attached
-	 * to the transaction are submitted to the {@link EventExecutor}. The
-	 * database lock is then released.
+	 * Ends a transaction. If the transaction has not been committed,
+	 * it will be aborted. If the transaction has been committed,
+	 * any events attached to the transaction are broadcast.
+	 * The database lock will be released in either case.
 	 */
 	void endTransaction(Transaction txn);

 	/**
-	 * Runs the given task within a transaction. The database lock is held
-	 * while running the task.
-	 *
-	 * @param readOnly True if the transaction will only be used for reading,
-	 * in which case the database lock can be shared with other read-only
-	 * transactions.
+	 * Runs the given task within a transaction.
 	 */
 	<E extends Exception> void transaction(boolean readOnly,
 			DbRunnable<E> task) throws DbException, E;

 	/**
 	 * Runs the given task within a transaction and returns the result of the
-	 * task. The database lock is held while running the task.
-	 *
-	 * @param readOnly True if the transaction will only be used for reading,
-	 * in which case the database lock can be shared with other read-only
-	 * transactions.
+	 * task.
 	 */
 	<R, E extends Exception> R transactionWithResult(boolean readOnly,
 			DbCallable<R, E> task) throws DbException, E;

 	/**
 	 * Runs the given task within a transaction and returns the result of the
-	 * task, which may be null. The database lock is held while running the
-	 * task.
-	 *
-	 * @param readOnly True if the transaction will only be used for reading,
-	 * in which case the database lock can be shared with other read-only
-	 * transactions.
+	 * task, which may be null.
 	 */
 	@Nullable
 	<R, E extends Exception> R transactionWithNullableResult(boolean readOnly,
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/identity/AuthorId.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/identity/AuthorId.java
@@ -21,4 +21,9 @@ public class AuthorId extends UniqueId {
 	public AuthorId(byte[] id) {
 		super(id);
 	}
+
+	@Override
+	public boolean equals(Object o) {
+		return o instanceof AuthorId && super.equals(o);
+	}
 }
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/InvalidMailboxIdException.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/InvalidMailboxIdException.java
@@ -1,8 +0,0 @@
-package org.briarproject.bramble.api.mailbox;
-
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-
-@NotNullByDefault
-public class InvalidMailboxIdException extends Exception {
-
-}
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxAuthToken.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxAuthToken.java
@@ -1,24 +0,0 @@
-package org.briarproject.bramble.api.mailbox;
-
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-
-import javax.annotation.Nullable;
-import javax.annotation.concurrent.ThreadSafe;
-
-@ThreadSafe
-@NotNullByDefault
-public class MailboxAuthToken extends MailboxId {
-	public MailboxAuthToken(byte[] id) {
-		super(id);
-	}
-
-	/**
-	 * Creates a {@link MailboxAuthToken} from the given string.
-	 *
-	 * @throws InvalidMailboxIdException if token is not valid.
-	 */
-	public static MailboxAuthToken fromString(@Nullable String token)
-			throws InvalidMailboxIdException {
-		return new MailboxAuthToken(bytesFromString(token));
-	}
-}
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxConstants.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxConstants.java
@@ -1,68 +0,0 @@
-package org.briarproject.bramble.api.mailbox;
-
-import org.briarproject.bramble.api.plugin.TransportId;
-
-import java.util.List;
-
-import static java.util.Collections.singletonList;
-import static java.util.concurrent.TimeUnit.HOURS;
-import static org.briarproject.bramble.api.transport.TransportConstants.MAX_FRAME_LENGTH;
-import static org.briarproject.bramble.api.transport.TransportConstants.MAX_PAYLOAD_LENGTH;
-import static org.briarproject.bramble.api.transport.TransportConstants.STREAM_HEADER_LENGTH;
-import static org.briarproject.bramble.api.transport.TransportConstants.TAG_LENGTH;
-
-public interface MailboxConstants {
-
-	/**
-	 * The transport ID of the mailbox plugin.
-	 */
-	TransportId ID = new TransportId("org.briarproject.bramble.mailbox");
-
-	/**
-	 * Mailbox API versions that we support as a client. This is reported to our
-	 * contacts by {@link MailboxUpdateManager}.
-	 */
-	List<MailboxVersion> CLIENT_SUPPORTS = singletonList(
-			new MailboxVersion(1, 0));
-
-	/**
-	 * The constant returned by
-	 * {@link MailboxHelper#getHighestCommonMajorVersion(List, List)}
-	 * when the server is too old to support our major version.
-	 */
-	int API_SERVER_TOO_OLD = -1;
-
-	/**
-	 * The constant returned by
-	 * {@link MailboxHelper#getHighestCommonMajorVersion(List, List)}
-	 * when we as a client are too old to support the server's major version.
-	 */
-	int API_CLIENT_TOO_OLD = -2;
-
-	/**
-	 * The maximum length of a file that can be uploaded to or downloaded from
-	 * a mailbox.
-	 */
-	int MAX_FILE_BYTES = 1024 * 1024;
-
-	/**
-	 * The maximum length of the plaintext payload of a file, such that the
-	 * ciphertext is no more than {@link #MAX_FILE_BYTES}.
-	 */
-	int MAX_FILE_PAYLOAD_BYTES =
-			(MAX_FILE_BYTES - TAG_LENGTH - STREAM_HEADER_LENGTH)
-					/ MAX_FRAME_LENGTH * MAX_PAYLOAD_LENGTH;
-
-	/**
-	 * The number of connection failures
-	 * that indicate a problem with the mailbox.
-	 */
-	int PROBLEM_NUM_CONNECTION_FAILURES = 5;
-
-	/**
-	 * The time in milliseconds since the last connection success
-	 * that need to pass to indicates a problem with the mailbox.
-	 */
-	long PROBLEM_MS_SINCE_LAST_SUCCESS = HOURS.toMillis(1);
-
-}
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxDirectory.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxDirectory.java
@@ -1,22 +0,0 @@
-package org.briarproject.bramble.api.mailbox;
-
-import java.io.File;
-import java.lang.annotation.Retention;
-import java.lang.annotation.Target;
-
-import javax.inject.Qualifier;
-
-import static java.lang.annotation.ElementType.FIELD;
-import static java.lang.annotation.ElementType.METHOD;
-import static java.lang.annotation.ElementType.PARAMETER;
-import static java.lang.annotation.RetentionPolicy.RUNTIME;
-
-/**
- * Annotation for injecting the {@link File directory} where the Mailbox plugin
- * should store its state.
- */
-@Qualifier
-@Target({FIELD, METHOD, PARAMETER})
-@Retention(RUNTIME)
-public @interface MailboxDirectory {
-}
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxFileId.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxFileId.java
@@ -1,24 +0,0 @@
-package org.briarproject.bramble.api.mailbox;
-
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-
-import javax.annotation.Nullable;
-import javax.annotation.concurrent.ThreadSafe;
-
-@ThreadSafe
-@NotNullByDefault
-public class MailboxFileId extends MailboxId {
-	public MailboxFileId(byte[] id) {
-		super(id);
-	}
-
-	/**
-	 * Creates a {@link MailboxFileId} from the given string.
-	 *
-	 * @throws IllegalArgumentException if token is not valid.
-	 */
-	public static MailboxFileId fromString(@Nullable String token)
-			throws InvalidMailboxIdException {
-		return new MailboxFileId(bytesFromString(token));
-	}
-}
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxFolderId.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxFolderId.java
@@ -1,24 +0,0 @@
-package org.briarproject.bramble.api.mailbox;
-
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-
-import javax.annotation.Nullable;
-import javax.annotation.concurrent.ThreadSafe;
-
-@ThreadSafe
-@NotNullByDefault
-public class MailboxFolderId extends MailboxId {
-	public MailboxFolderId(byte[] id) {
-		super(id);
-	}
-
-	/**
-	 * Creates a {@link MailboxFolderId} from the given string.
-	 *
-	 * @throws IllegalArgumentException if token is not valid.
-	 */
-	public static MailboxFolderId fromString(@Nullable String token)
-			throws InvalidMailboxIdException {
-		return new MailboxFolderId(bytesFromString(token));
-	}
-}
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxHelper.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxHelper.java
@@ -1,35 +0,0 @@
-package org.briarproject.bramble.api.mailbox;
-
-import java.util.List;
-import java.util.TreeSet;
-
-import static org.briarproject.bramble.api.mailbox.MailboxConstants.API_CLIENT_TOO_OLD;
-import static org.briarproject.bramble.api.mailbox.MailboxConstants.API_SERVER_TOO_OLD;
-
-class MailboxHelper {
-
-	/**
-	 * Returns the highest major version that both client and server support
-	 * or {@link MailboxConstants#API_SERVER_TOO_OLD} if the server is too old
-	 * or {@link MailboxConstants#API_CLIENT_TOO_OLD} if the client is too old.
-	 */
-	static int getHighestCommonMajorVersion(
-			List<MailboxVersion> client, List<MailboxVersion> server) {
-		TreeSet<Integer> clientVersions = new TreeSet<>();
-		for (MailboxVersion version : client) {
-			clientVersions.add(version.getMajor());
-		}
-		TreeSet<Integer> serverVersions = new TreeSet<>();
-		for (MailboxVersion version : server) {
-			serverVersions.add(version.getMajor());
-		}
-		for (int clientVersion : clientVersions.descendingSet()) {
-			if (serverVersions.contains(clientVersion)) return clientVersion;
-		}
-		if (clientVersions.last() < serverVersions.last()) {
-			return API_CLIENT_TOO_OLD;
-		}
-		return API_SERVER_TOO_OLD;
-	}
-
-}
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxId.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxId.java
@@ -1,49 +0,0 @@
-package org.briarproject.bramble.api.mailbox;
-
-import com.fasterxml.jackson.annotation.JsonValue;
-
-import org.briarproject.bramble.api.UniqueId;
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-
-import java.util.Locale;
-
-import javax.annotation.Nullable;
-import javax.annotation.concurrent.ThreadSafe;
-
-import static org.briarproject.bramble.util.StringUtils.fromHexString;
-import static org.briarproject.bramble.util.StringUtils.toHexString;
-
-@ThreadSafe
-@NotNullByDefault
-public abstract class MailboxId extends UniqueId {
-	MailboxId(byte[] id) {
-		super(id);
-	}
-
-	/**
-	 * Returns valid {@link MailboxId} bytes from the given string.
-	 *
-	 * @throws InvalidMailboxIdException if token is not valid.
-	 */
-	static byte[] bytesFromString(@Nullable String token)
-			throws InvalidMailboxIdException {
-		if (token == null || token.length() != 64) {
-			throw new InvalidMailboxIdException();
-		}
-		try {
-			return fromHexString(token);
-		} catch (IllegalArgumentException e) {
-			throw new InvalidMailboxIdException();
-		}
-	}
-
-	/**
-	 * Returns the string representation expected by the mailbox API.
-	 * Also used for serialization.
-	 */
-	@Override
-	@JsonValue
-	public String toString() {
-		return toHexString(getBytes()).toLowerCase(Locale.US);
-	}
-}
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxManager.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxManager.java
@@ -1,56 +0,0 @@
-package org.briarproject.bramble.api.mailbox;
-
-import org.briarproject.bramble.api.db.DbException;
-import org.briarproject.bramble.api.db.Transaction;
-import org.briarproject.bramble.api.lifecycle.IoExecutor;
-import org.briarproject.bramble.api.mailbox.event.OwnMailboxConnectionStatusEvent;
-
-import javax.annotation.Nullable;
-
-public interface MailboxManager {
-
-	/**
-	 * @return true if a mailbox is already paired.
-	 */
-	boolean isPaired(Transaction txn) throws DbException;
-
-	/**
-	 * @return the current status of the mailbox.
-	 */
-	MailboxStatus getMailboxStatus(Transaction txn) throws DbException;
-
-	/**
-	 * Returns the currently running pairing task,
-	 * or null if no pairing task is running.
-	 */
-	@Nullable
-	MailboxPairingTask getCurrentPairingTask();
-
-	/**
-	 * Starts and returns a pairing task. If a pairing task is already running,
-	 * it will be returned and the argument will be ignored.
-	 *
-	 * @param qrCodePayload The ISO-8859-1 encoded bytes of the mailbox QR code.
-	 */
-	MailboxPairingTask startPairingTask(String qrCodePayload);
-
-	/**
-	 * Can be used by the UI to test the mailbox connection.
-	 *
-	 * @return true (success) or false (error).
-	 * A {@link OwnMailboxConnectionStatusEvent} might be broadcast with a new
-	 * {@link MailboxStatus}.
-	 */
-	boolean checkConnection();
-
-	/**
-	 * Unpairs the owner's mailbox and tries to wipe it.
-	 * As this makes a network call, it should be run on the {@link IoExecutor}.
-	 *
-	 * @return true if we could wipe the mailbox, false if we couldn't.
-	 * It is advised to inform the user to wipe the mailbox themselves,
-	 * if we failed to wipe it.
-	 */
-	@IoExecutor
-	boolean unPair() throws DbException;
-}
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxPairingState.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxPairingState.java
@@ -1,25 +0,0 @@
-package org.briarproject.bramble.api.mailbox;
-
-public abstract class MailboxPairingState {
-
-	public static class QrCodeReceived extends MailboxPairingState {
-	}
-
-	public static class Pairing extends MailboxPairingState {
-	}
-
-	public static class Paired extends MailboxPairingState {
-	}
-
-	public static class InvalidQrCode extends MailboxPairingState {
-	}
-
-	public static class MailboxAlreadyPaired extends MailboxPairingState {
-	}
-
-	public static class ConnectionError extends MailboxPairingState {
-	}
-
-	public static class UnexpectedError extends MailboxPairingState {
-	}
-}
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxPairingTask.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxPairingTask.java
@@ -1,21 +0,0 @@
-package org.briarproject.bramble.api.mailbox;
-
-import org.briarproject.bramble.api.Consumer;
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-
-@NotNullByDefault
-public interface MailboxPairingTask extends Runnable {
-
-	/**
-	 * Adds an observer to the task. The observer will be notified on the
-	 * event thread of the current state of the task and any subsequent state
-	 * changes.
-	 */
-	void addObserver(Consumer<MailboxPairingState> observer);
-
-	/**
-	 * Removes an observer from the task.
-	 */
-	void removeObserver(Consumer<MailboxPairingState> observer);
-
-}
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxProperties.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxProperties.java
@@ -1,80 +0,0 @@
-package org.briarproject.bramble.api.mailbox;
-
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-
-import java.util.List;
-
-import javax.annotation.Nullable;
-import javax.annotation.concurrent.Immutable;
-
-@Immutable
-@NotNullByDefault
-public class MailboxProperties {
-
-	private final String baseUrl;
-	private final MailboxAuthToken authToken;
-	private final boolean owner;
-	private final List<MailboxVersion> serverSupports;
-	@Nullable
-	private final MailboxFolderId inboxId; // Null for own mailbox
-	@Nullable
-	private final MailboxFolderId outboxId; // Null for own mailbox
-
-	/**
-	 * Constructor for properties used by the mailbox's owner.
-	 */
-	public MailboxProperties(String baseUrl, MailboxAuthToken authToken,
-			List<MailboxVersion> serverSupports) {
-		this.baseUrl = baseUrl;
-		this.authToken = authToken;
-		this.owner = true;
-		this.serverSupports = serverSupports;
-		this.inboxId = null;
-		this.outboxId = null;
-	}
-
-	/**
-	 * Constructor for properties used by a contact of the mailbox's owner.
-	 */
-	public MailboxProperties(String baseUrl, MailboxAuthToken authToken,
-			List<MailboxVersion> serverSupports, MailboxFolderId inboxId,
-			MailboxFolderId outboxId) {
-		this.baseUrl = baseUrl;
-		this.authToken = authToken;
-		this.owner = false;
-		this.serverSupports = serverSupports;
-		this.inboxId = inboxId;
-		this.outboxId = outboxId;
-	}
-
-	public String getBaseUrl() {
-		return baseUrl;
-	}
-
-	public String getOnion() {
-		return baseUrl.replaceFirst("^http://", "")
-				.replaceFirst("\\.onion$", "");
-	}
-
-	public MailboxAuthToken getAuthToken() {
-		return authToken;
-	}
-
-	public boolean isOwner() {
-		return owner;
-	}
-
-	public List<MailboxVersion> getServerSupports() {
-		return serverSupports;
-	}
-
-	@Nullable
-	public MailboxFolderId getInboxId() {
-		return inboxId;
-	}
-
-	@Nullable
-	public MailboxFolderId getOutboxId() {
-		return outboxId;
-	}
-}
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxSettingsManager.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxSettingsManager.java
@@ -1,65 +0,0 @@
-package org.briarproject.bramble.api.mailbox;
-
-import org.briarproject.bramble.api.contact.ContactId;
-import org.briarproject.bramble.api.crypto.SecretKey;
-import org.briarproject.bramble.api.db.DbException;
-import org.briarproject.bramble.api.db.Transaction;
-import org.briarproject.bramble.api.lifecycle.LifecycleManager;
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-
-import java.util.List;
-
-import javax.annotation.Nullable;
-
-@NotNullByDefault
-public interface MailboxSettingsManager {
-
-	/**
-	 * Registers a hook to be called when a mailbox has been paired or unpaired.
-	 * This method should be called before
-	 * {@link LifecycleManager#startServices(SecretKey)}.
-	 */
-	void registerMailboxHook(MailboxHook hook);
-
-	@Nullable
-	MailboxProperties getOwnMailboxProperties(Transaction txn)
-			throws DbException;
-
-	void setOwnMailboxProperties(Transaction txn, MailboxProperties p)
-			throws DbException;
-
-	void removeOwnMailboxProperties(Transaction txn) throws DbException;
-
-	MailboxStatus getOwnMailboxStatus(Transaction txn) throws DbException;
-
-	void recordSuccessfulConnection(Transaction txn, long now)
-			throws DbException;
-
-	void recordFailedConnectionAttempt(Transaction txn, long now)
-			throws DbException;
-
-	void setPendingUpload(Transaction txn, ContactId id,
-			@Nullable String filename) throws DbException;
-
-	@Nullable
-	String getPendingUpload(Transaction txn, ContactId id) throws DbException;
-
-	interface MailboxHook {
-		/**
-		 * Called when Briar is paired with a mailbox
-		 *
-		 * @param txn A read-write transaction
-		 * @param ownOnion Our new mailbox's onion (56 base32 chars)
-		 */
-		void mailboxPaired(Transaction txn, String ownOnion,
-				List<MailboxVersion> serverSupports)
-				throws DbException;
-
-		/**
-		 * Called when the mailbox is unpaired
-		 *
-		 * @param txn A read-write transaction
-		 */
-		void mailboxUnpaired(Transaction txn) throws DbException;
-	}
-}
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxStatus.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxStatus.java
@@ -1,86 +0,0 @@
-package org.briarproject.bramble.api.mailbox;
-
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-
-import java.util.List;
-
-import javax.annotation.concurrent.Immutable;
-
-import static org.briarproject.bramble.api.mailbox.MailboxConstants.CLIENT_SUPPORTS;
-import static org.briarproject.bramble.api.mailbox.MailboxConstants.PROBLEM_MS_SINCE_LAST_SUCCESS;
-import static org.briarproject.bramble.api.mailbox.MailboxConstants.PROBLEM_NUM_CONNECTION_FAILURES;
-import static org.briarproject.bramble.api.mailbox.MailboxHelper.getHighestCommonMajorVersion;
-
-@Immutable
-@NotNullByDefault
-public class MailboxStatus {
-
-	private final long lastAttempt, lastSuccess;
-	private final int attemptsSinceSuccess;
-	private final List<MailboxVersion> serverSupports;
-
-	public MailboxStatus(long lastAttempt, long lastSuccess,
-			int attemptsSinceSuccess,
-			List<MailboxVersion> serverSupports) {
-		this.lastAttempt = lastAttempt;
-		this.lastSuccess = lastSuccess;
-		this.attemptsSinceSuccess = attemptsSinceSuccess;
-		this.serverSupports = serverSupports;
-	}
-
-	/**
-	 * Returns the time of the last attempt to connect to the mailbox, in
-	 * milliseconds since the Unix epoch, or -1 if no attempt has been made.
-	 * <p>
-	 * If an attempt is in progress and has not yet succeeded or failed then
-	 * this method returns the time of the previous attempt, or -1 if the
-	 * current attempt is the first.
-	 */
-	public long getTimeOfLastAttempt() {
-		return lastAttempt;
-	}
-
-	/**
-	 * Returns the time of the last successful attempt to connect to the
-	 * mailbox, in milliseconds since the Unix epoch, or -1 if no attempt has
-	 * succeeded.
-	 * <p>
-	 * If the last attempt was successful then this method returns the same
-	 * value as {@link #getTimeOfLastAttempt()}. If an attempt is in progress
-	 * and has not yet succeeded or failed then this method returns the time
-	 * of the previous successful connection, or -1 if no attempt has
-	 * succeeded.
-	 */
-	public long getTimeOfLastSuccess() {
-		return lastSuccess;
-	}
-
-	/**
-	 * Returns the number of attempts to connect to the mailbox that have
-	 * failed since the last attempt succeeded, or the number of attempts that
-	 * have been made, if no attempt has ever succeeded.
-	 * <p>
-	 * If an attempt is in progress and has not yet succeeded or failed then
-	 * it is not included in this count.
-	 */
-	public int getAttemptsSinceSuccess() {
-		return attemptsSinceSuccess;
-	}
-
-	/**
-	 * @return true if this status indicates a problem with the mailbox.
-	 */
-	public boolean hasProblem(long now) {
-		return attemptsSinceSuccess >= PROBLEM_NUM_CONNECTION_FAILURES &&
-				(now - lastSuccess) >= PROBLEM_MS_SINCE_LAST_SUCCESS;
-	}
-
-	/**
-	 * @return a positive integer if the mailbox is compatible. Same result as
-	 * {@link MailboxHelper#getHighestCommonMajorVersion(List, List)}.
-	 */
-	public int getMailboxCompatibility() {
-		return getHighestCommonMajorVersion(CLIENT_SUPPORTS, serverSupports);
-	}
-
-}
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxUpdate.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxUpdate.java
@@ -1,31 +0,0 @@
-package org.briarproject.bramble.api.mailbox;
-
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-
-import java.util.List;
-
-import javax.annotation.concurrent.Immutable;
-
-@Immutable
-@NotNullByDefault
-public class MailboxUpdate {
-	private final boolean hasMailbox;
-	private final List<MailboxVersion> clientSupports;
-
-	public MailboxUpdate(List<MailboxVersion> clientSupports) {
-		this(clientSupports, false);
-	}
-
-	MailboxUpdate(List<MailboxVersion> clientSupports, boolean hasMailbox) {
-		this.clientSupports = clientSupports;
-		this.hasMailbox = hasMailbox;
-	}
-
-	public List<MailboxVersion> getClientSupports() {
-		return clientSupports;
-	}
-
-	public boolean hasMailbox() {
-		return hasMailbox;
-	}
-}
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxUpdateManager.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxUpdateManager.java
@@ -1,72 +0,0 @@
-package org.briarproject.bramble.api.mailbox;
-
-import org.briarproject.bramble.api.contact.ContactId;
-import org.briarproject.bramble.api.db.DbException;
-import org.briarproject.bramble.api.db.Transaction;
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.api.sync.ClientId;
-
-import javax.annotation.Nullable;
-
-@NotNullByDefault
-public interface MailboxUpdateManager {
-
-	/**
-	 * The unique ID of the mailbox update (properties) client.
-	 */
-	ClientId CLIENT_ID =
-			new ClientId("org.briarproject.bramble.mailbox.properties");
-
-	/**
-	 * The current major version of the mailbox update (properties) client.
-	 */
-	int MAJOR_VERSION = 2;
-
-	/**
-	 * The current minor version of the mailbox update (properties) client.
-	 */
-	int MINOR_VERSION = 0;
-
-	/**
-	 * The number of properties required for an update message with a mailbox.
-	 */
-	int PROP_COUNT = 4;
-
-	/**
-	 * The required properties of an update message with a mailbox.
-	 */
-	String PROP_KEY_ONION = "onion";
-	String PROP_KEY_AUTHTOKEN = "authToken";
-	String PROP_KEY_INBOXID = "inboxId";
-	String PROP_KEY_OUTBOXID = "outboxId";
-
-	/**
-	 * Length of the Onion property.
-	 */
-	int PROP_ONION_LENGTH = 56;
-
-	/**
-	 * Message metadata key for the version number of a local or remote update,
-	 * as a BDF long.
-	 */
-	String MSG_KEY_VERSION = "version";
-
-	/**
-	 * Message metadata key for whether an update is local or remote, as a BDF
-	 * boolean.
-	 */
-	String MSG_KEY_LOCAL = "local";
-
-	/**
-	 * Key in the client's local group for storing the clientSupports list that
-	 * was last sent out.
-	 */
-	String GROUP_KEY_SENT_CLIENT_SUPPORTS = "sentClientSupports";
-
-	MailboxUpdate getLocalUpdate(Transaction txn, ContactId c)
-			throws DbException;
-
-	@Nullable
-	MailboxUpdate getRemoteUpdate(Transaction txn, ContactId c)
-			throws DbException;
-}
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxUpdateWithMailbox.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxUpdateWithMailbox.java
@@ -1,30 +0,0 @@
-package org.briarproject.bramble.api.mailbox;
-
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-
-import java.util.List;
-
-import javax.annotation.concurrent.Immutable;
-
-@Immutable
-@NotNullByDefault
-public class MailboxUpdateWithMailbox extends MailboxUpdate {
-
-	private final MailboxProperties properties;
-
-	public MailboxUpdateWithMailbox(List<MailboxVersion> clientSupports,
-			MailboxProperties properties) {
-		super(clientSupports, true);
-		if (properties.isOwner()) throw new IllegalArgumentException();
-		this.properties = properties;
-	}
-
-	public MailboxUpdateWithMailbox(MailboxUpdateWithMailbox o,
-			List<MailboxVersion> newClientSupports) {
-		this(newClientSupports, o.getMailboxProperties());
-	}
-
-	public MailboxProperties getMailboxProperties() {
-		return properties;
-	}
-}
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxVersion.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxVersion.java
@@ -1,44 +0,0 @@
-package org.briarproject.bramble.api.mailbox;
-
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-
-import javax.annotation.concurrent.Immutable;
-
-@Immutable
-@NotNullByDefault
-public class MailboxVersion implements Comparable<MailboxVersion> {
-
-	private final int major;
-	private final int minor;
-
-	public MailboxVersion(int major, int minor) {
-		this.major = major;
-		this.minor = minor;
-	}
-
-	public int getMajor() {
-		return major;
-	}
-
-	public int getMinor() {
-		return minor;
-	}
-
-	@Override
-	public boolean equals(Object o) {
-		if (o instanceof MailboxVersion) {
-			MailboxVersion v = (MailboxVersion) o;
-			return major == v.major && minor == v.minor;
-		}
-		return false;
-	}
-
-	@Override
-	public int compareTo(MailboxVersion v) {
-		int c = major - v.major;
-		if (c != 0) {
-			return c;
-		}
-		return minor - v.minor;
-	}
-}
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/event/MailboxProblemEvent.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/event/MailboxProblemEvent.java
@@ -1,19 +0,0 @@
-package org.briarproject.bramble.api.mailbox.event;
-
-import org.briarproject.bramble.api.event.Event;
-import org.briarproject.bramble.api.mailbox.MailboxSettingsManager;
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-
-import javax.annotation.concurrent.Immutable;
-
-/**
- * An event that is broadcast by {@link MailboxSettingsManager} when
- * recording a connection failure for own Mailbox
- * that has persistent for long enough for the mailbox owner to become active
- * and fix the problem with the mailbox.
- */
-@Immutable
-@NotNullByDefault
-public class MailboxProblemEvent extends Event {
-
-}
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/event/OwnMailboxConnectionStatusEvent.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/event/OwnMailboxConnectionStatusEvent.java
@@ -1,27 +0,0 @@
-package org.briarproject.bramble.api.mailbox.event;
-
-import org.briarproject.bramble.api.event.Event;
-import org.briarproject.bramble.api.mailbox.MailboxSettingsManager;
-import org.briarproject.bramble.api.mailbox.MailboxStatus;
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-
-import javax.annotation.concurrent.Immutable;
-
-/**
- * An event that is broadcast by {@link MailboxSettingsManager} when
- * recording the connection status of own Mailbox.
- */
-@Immutable
-@NotNullByDefault
-public class OwnMailboxConnectionStatusEvent extends Event {
-
-	private final MailboxStatus status;
-
-	public OwnMailboxConnectionStatusEvent(MailboxStatus status) {
-		this.status = status;
-	}
-
-	public MailboxStatus getStatus() {
-		return status;
-	}
-}
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/event/RemoteMailboxUpdateEvent.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/event/RemoteMailboxUpdateEvent.java
@@ -1,34 +0,0 @@
-package org.briarproject.bramble.api.mailbox.event;
-
-import org.briarproject.bramble.api.contact.ContactId;
-import org.briarproject.bramble.api.event.Event;
-import org.briarproject.bramble.api.mailbox.MailboxUpdate;
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-
-import javax.annotation.concurrent.Immutable;
-
-/**
- * An event that is broadcast when {@link MailboxUpdate} are received
- * from a contact.
- */
-@Immutable
-@NotNullByDefault
-public class RemoteMailboxUpdateEvent extends Event {
-
-	private final ContactId contactId;
-	private final MailboxUpdate mailboxUpdate;
-
-	public RemoteMailboxUpdateEvent(ContactId contactId,
-			MailboxUpdate mailboxUpdate) {
-		this.contactId = contactId;
-		this.mailboxUpdate = mailboxUpdate;
-	}
-
-	public ContactId getContact() {
-		return contactId;
-	}
-
-	public MailboxUpdate getMailboxUpdate() {
-		return mailboxUpdate;
-	}
-}
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/plugin/BackoffFactory.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/plugin/BackoffFactory.java
@@ -1,9 +1,7 @@
 package org.briarproject.bramble.api.plugin;

-import org.briarproject.bramble.api.event.EventBus;
-
 public interface BackoffFactory {

-	Backoff createBackoff(EventBus eventBus, TransportId transportId,
-			int minInterval, int maxInterval, double base);
+	Backoff createBackoff(int minInterval, int maxInterval,
+			double base);
 }
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/plugin/PluginCallback.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/plugin/PluginCallback.java
@@ -56,9 +56,4 @@ public interface PluginCallback extends ConnectionHandler {
 	 * This method can safely be called while holding a lock.
 	 */
 	void pluginStateChanged(State state);
-
-	/**
-	 * Informs the callback that the plugin's polling interval has decreased.
-	 */
-	void pollingIntervalDecreased();
 }
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/plugin/TorConstants.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/plugin/TorConstants.java
@@ -1,27 +1,31 @@
 package org.briarproject.bramble.api.plugin;

-import static java.util.concurrent.TimeUnit.SECONDS;
+import static java.util.concurrent.TimeUnit.DAYS;

 public interface TorConstants {

 	TransportId ID = new TransportId("org.briarproject.bramble.tor");

 	// Transport properties
+	String PROP_ONION_V2 = "onion";
 	String PROP_ONION_V3 = "onion3";

-	int DEFAULT_SOCKS_PORT = 59050;
-	int DEFAULT_CONTROL_PORT = 59051;
-
-	int CONNECT_TO_PROXY_TIMEOUT = (int) SECONDS.toMillis(5);
-	int EXTRA_CONNECT_TIMEOUT = (int) SECONDS.toMillis(120);
-	int EXTRA_SOCKET_TIMEOUT = (int) SECONDS.toMillis(30);
+	int CONNECT_TO_PROXY_TIMEOUT = 5000; // Milliseconds
+	int EXTRA_SOCKET_TIMEOUT = 30000; // Milliseconds

 	// Local settings (not shared with contacts)
 	String PREF_TOR_NETWORK = "network2";
 	String PREF_TOR_PORT = "port";
 	String PREF_TOR_MOBILE = "useMobileData";
 	String PREF_TOR_ONLY_WHEN_CHARGING = "onlyWhenCharging";
+	String HS_PRIVATE_KEY_V2 = "onionPrivKey";
 	String HS_PRIVATE_KEY_V3 = "onionPrivKey3";
+	String HS_V3_CREATED = "onionPrivKey3Created";
+
+	/**
+	 * How long to publish a v3 hidden service before retiring the v2 service.
+	 */
+	long V3_MIGRATION_PERIOD_MS = DAYS.toMillis(180);

 	// Values for PREF_TOR_NETWORK
 	int PREF_TOR_NETWORK_AUTOMATIC = 0;
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/plugin/TorControlPort.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/plugin/TorControlPort.java
@@ -1,20 +0,0 @@
-package org.briarproject.bramble.api.plugin;
-
-import java.lang.annotation.Retention;
-import java.lang.annotation.Target;
-
-import javax.inject.Qualifier;
-
-import static java.lang.annotation.ElementType.FIELD;
-import static java.lang.annotation.ElementType.METHOD;
-import static java.lang.annotation.ElementType.PARAMETER;
-import static java.lang.annotation.RetentionPolicy.RUNTIME;
-
-/**
- * Annotation for injecting the control port for the Tor plugin.
- */
-@Qualifier
-@Target({FIELD, METHOD, PARAMETER})
-@Retention(RUNTIME)
-public @interface TorControlPort {
-}
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/plugin/TorSocksPort.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/plugin/TorSocksPort.java
@@ -1,20 +0,0 @@
-package org.briarproject.bramble.api.plugin;
-
-import java.lang.annotation.Retention;
-import java.lang.annotation.Target;
-
-import javax.inject.Qualifier;
-
-import static java.lang.annotation.ElementType.FIELD;
-import static java.lang.annotation.ElementType.METHOD;
-import static java.lang.annotation.ElementType.PARAMETER;
-import static java.lang.annotation.RetentionPolicy.RUNTIME;
-
-/**
- * Annotation for injecting the socks port for the Tor plugin.
- */
-@Qualifier
-@Target({FIELD, METHOD, PARAMETER})
-@Retention(RUNTIME)
-public @interface TorSocksPort {
-}
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/plugin/event/PollingIntervalDecreasedEvent.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/plugin/event/PollingIntervalDecreasedEvent.java
@@ -1,25 +0,0 @@
-package org.briarproject.bramble.api.plugin.event;
-
-import org.briarproject.bramble.api.event.Event;
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.api.plugin.TransportId;
-
-import javax.annotation.concurrent.Immutable;
-
-/**
- * An event that is broadcast when a plugin's polling interval decreases.
- */
-@Immutable
-@NotNullByDefault
-public class PollingIntervalDecreasedEvent extends Event {
-
-	private final TransportId transportId;
-
-	public PollingIntervalDecreasedEvent(TransportId transportId) {
-		this.transportId = transportId;
-	}
-
-	public TransportId getTransportId() {
-		return transportId;
-	}
-}
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/record/RecordWriter.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/record/RecordWriter.java
@@ -12,6 +12,4 @@ public interface RecordWriter {
 	void flush() throws IOException;

 	void close() throws IOException;
-
-	long getBytesWritten();
 }
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/settings/SettingsManager.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/settings/SettingsManager.java
@@ -22,11 +22,4 @@ public interface SettingsManager {
 	 * namespace.
 	 */
 	void mergeSettings(Settings s, String namespace) throws DbException;
-
-	/**
-	 * Merges the given settings with any existing settings in the given
-	 * namespace.
-	 */
-	void mergeSettings(Transaction txn, Settings s, String namespace)
-			throws DbException;
 }
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/sync/DeferredSendHandler.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/sync/DeferredSendHandler.java
@@ -1,15 +0,0 @@
-package org.briarproject.bramble.api.sync;
-
-import java.util.Collection;
-
-/**
- * An interface for holding the IDs of messages sent and acked during an
- * outgoing {@link SyncSession} so they can be recorded in the DB as sent
- * or acked at some later time.
- */
-public interface DeferredSendHandler {
-
-	void onAckSent(Collection<MessageId> acked);
-
-	void onMessageSent(MessageId sent);
-}
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/sync/GroupId.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/sync/GroupId.java
@@ -20,4 +20,9 @@ public class GroupId extends UniqueId {
 	public GroupId(byte[] id) {
 		super(id);
 	}
+
+	@Override
+	public boolean equals(Object o) {
+		return o instanceof GroupId && super.equals(o);
+	}
 }
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/sync/MessageId.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/sync/MessageId.java
@@ -27,4 +27,9 @@ public class MessageId extends UniqueId {
 	public MessageId(byte[] id) {
 		super(id);
 	}
+
+	@Override
+	public boolean equals(Object o) {
+		return o instanceof MessageId && super.equals(o);
+	}
 }
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/sync/SyncRecordWriter.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/sync/SyncRecordWriter.java
@@ -20,6 +20,4 @@ public interface SyncRecordWriter {
 	void writePriority(Priority p) throws IOException;

 	void flush() throws IOException;
-
-	long getBytesWritten();
 }
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/system/TaskScheduler.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/system/TaskScheduler.java
@@ -1,6 +1,5 @@
 package org.briarproject.bramble.api.system;

-import org.briarproject.bramble.api.Cancellable;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;

 import java.util.concurrent.Executor;
@@ -17,8 +16,6 @@ public interface TaskScheduler {
 	 * <p>
 	 * If the platform supports wake locks, a wake lock will be held while
 	 * submitting and running the task.
-	 *
-	 * @return A {@link Cancellable} for cancelling the task.
 	 */
 	Cancellable schedule(Runnable task, Executor executor, long delay,
 			TimeUnit unit);
@@ -30,11 +27,17 @@ public interface TaskScheduler {
 	 * <p>
 	 * If the platform supports wake locks, a wake lock will be held while
 	 * submitting and running the task.
-	 *
-	 * @return A {@link Cancellable} for cancelling all future executions of
-	 * the task.
 	 */
 	Cancellable scheduleWithFixedDelay(Runnable task, Executor executor,
 			long delay, long interval, TimeUnit unit);

+	interface Cancellable {
+
+		/**
+		 * Cancels the task if it has not already started running. If the task
+		 * is {@link #scheduleWithFixedDelay(Runnable, Executor, long, long, TimeUnit) periodic},
+		 * all future executions of the task are cancelled.
+		 */
+		void cancel();
+	}
 }
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/transport/KeyManager.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/transport/KeyManager.java
@@ -113,25 +113,9 @@ public interface KeyManager {
 	/**
 	 * Looks up the given tag and returns a {@link StreamContext} for reading
 	 * from the corresponding stream, or null if an error occurs or the tag was
-	 * unexpected. Marks the tag as recognised and updates the reordering
-	 * window.
+	 * unexpected.
 	 */
 	@Nullable
 	StreamContext getStreamContext(TransportId t, byte[] tag)
 			throws DbException;
-
-	/**
-	 * Looks up the given tag and returns a {@link StreamContext} for reading
-	 * from the corresponding stream, or null if an error occurs or the tag was
-	 * unexpected. Only returns the StreamContext; does not mark the tag as
-	 * recognised.
-	 */
-	@Nullable
-	StreamContext getStreamContextOnly(TransportId t, byte[] tag)
-			throws DbException;
-
-	/**
-	 * Marks the tag as recognised and updates the reordering window.
-	 */
-	void markTagAsRecognised(TransportId t, byte[] tag) throws DbException;
 }
--- a/bramble-api/src/main/java/org/briarproject/bramble/util/NetworkUtils.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/util/NetworkUtils.java
@@ -26,7 +26,7 @@ public class NetworkUtils {
 			// Despite what the docs say, the return value can be null
 			//noinspection ConstantConditions
 			return ifaces == null ? emptyList() : list(ifaces);
-		} catch (SocketException | NullPointerException e) {
+		} catch (SocketException e) {
 			logException(LOG, WARNING, e);
 			return emptyList();
 		}
--- a/bramble-api/src/test/java/org/briarproject/bramble/api/mailbox/MailboxHelperTest.java
+++ b/bramble-api/src/test/java/org/briarproject/bramble/api/mailbox/MailboxHelperTest.java
@@ -1,44 +0,0 @@
-package org.briarproject.bramble.api.mailbox;
-
-import org.junit.Test;
-
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Random;
-
-import static org.briarproject.bramble.api.mailbox.MailboxConstants.API_CLIENT_TOO_OLD;
-import static org.briarproject.bramble.api.mailbox.MailboxConstants.API_SERVER_TOO_OLD;
-import static org.briarproject.bramble.api.mailbox.MailboxHelper.getHighestCommonMajorVersion;
-import static org.junit.Assert.assertEquals;
-
-public class MailboxHelperTest {
-
-	private final Random random = new Random();
-
-	@Test
-	public void testGetHighestCommonMajorVersion() {
-		assertEquals(2, getHighestCommonMajorVersion(v(2), v(2)));
-		assertEquals(2, getHighestCommonMajorVersion(v(1, 2), v(2, 3, 4)));
-		assertEquals(2, getHighestCommonMajorVersion(v(2, 3, 4), v(2)));
-		assertEquals(2, getHighestCommonMajorVersion(v(2), v(2, 3, 4)));
-
-		assertEquals(API_CLIENT_TOO_OLD,
-				getHighestCommonMajorVersion(v(2), v(3, 4)));
-		assertEquals(API_CLIENT_TOO_OLD,
-				getHighestCommonMajorVersion(v(2), v(1, 3)));
-		assertEquals(API_SERVER_TOO_OLD,
-				getHighestCommonMajorVersion(v(3, 4, 5), v(2)));
-		assertEquals(API_SERVER_TOO_OLD,
-				getHighestCommonMajorVersion(v(1, 3), v(2)));
-	}
-
-	private List<MailboxVersion> v(int... ints) {
-		List<MailboxVersion> versions = new ArrayList<>(ints.length);
-		for (int v : ints) {
-			// minor versions should not matter
-			versions.add(new MailboxVersion(v, random.nextInt(42)));
-		}
-		return versions;
-	}
-
-}
--- a/bramble-api/src/test/java/org/briarproject/bramble/test/BrambleMockTestCase.java
+++ b/bramble-api/src/test/java/org/briarproject/bramble/test/BrambleMockTestCase.java
@@ -1,17 +1,12 @@
 package org.briarproject.bramble.test;

 import org.jmock.Mockery;
-import org.jmock.lib.concurrent.Synchroniser;
 import org.junit.After;

 public abstract class BrambleMockTestCase extends BrambleTestCase {

 	protected final Mockery context = new Mockery();

-	public BrambleMockTestCase() {
-		context.setThreadingPolicy(new Synchroniser());
-	}
-
 	@After
 	public void checkExpectations() {
 		context.assertIsSatisfied();
--- a/bramble-api/src/test/java/org/briarproject/bramble/test/BrambleTestCase.java
+++ b/bramble-api/src/test/java/org/briarproject/bramble/test/BrambleTestCase.java
@@ -1,46 +1,17 @@
 package org.briarproject.bramble.test;

-import org.junit.After;
-import org.junit.Before;
-
 import java.lang.Thread.UncaughtExceptionHandler;
-import java.util.logging.Logger;

-import javax.annotation.Nullable;
-
-import static java.util.logging.Level.WARNING;
-import static java.util.logging.Logger.getLogger;
+import static org.junit.Assert.fail;

 public abstract class BrambleTestCase {

-	private static final Logger LOG =
-			getLogger(BrambleTestCase.class.getName());
-
-	@Nullable
-	protected volatile Throwable exceptionInBackgroundThread = null;
-
 	public BrambleTestCase() {
 		// Ensure exceptions thrown on worker threads cause tests to fail
 		UncaughtExceptionHandler fail = (thread, throwable) -> {
-			LOG.log(WARNING, "Caught unhandled exception", throwable);
-			exceptionInBackgroundThread = throwable;
+			throwable.printStackTrace();
+			fail();
 		};
 		Thread.setDefaultUncaughtExceptionHandler(fail);
 	}
-
-	@Before
-	public void beforeBrambleTestCase() {
-		exceptionInBackgroundThread = null;
-	}
-
-	@After
-	public void afterBrambleTestCase() {
-		Throwable thrown = exceptionInBackgroundThread;
-		if (thrown != null) {
-			LOG.log(WARNING,
-					"Background thread has thrown an exception unexpectedly",
-					thrown);
-			throw new AssertionError(thrown);
-		}
-	}
 }
--- a/bramble-api/src/test/java/org/briarproject/bramble/test/TestUtils.java
+++ b/bramble-api/src/test/java/org/briarproject/bramble/test/TestUtils.java
@@ -12,20 +12,10 @@ import org.briarproject.bramble.api.crypto.PublicKey;
 import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.crypto.SignaturePrivateKey;
 import org.briarproject.bramble.api.crypto.SignaturePublicKey;
-import org.briarproject.bramble.api.db.CommitAction;
-import org.briarproject.bramble.api.db.EventAction;
-import org.briarproject.bramble.api.db.Transaction;
-import org.briarproject.bramble.api.event.Event;
 import org.briarproject.bramble.api.identity.Author;
 import org.briarproject.bramble.api.identity.AuthorId;
 import org.briarproject.bramble.api.identity.Identity;
 import org.briarproject.bramble.api.identity.LocalAuthor;
-import org.briarproject.bramble.api.mailbox.MailboxAuthToken;
-import org.briarproject.bramble.api.mailbox.MailboxFolderId;
-import org.briarproject.bramble.api.mailbox.MailboxProperties;
-import org.briarproject.bramble.api.mailbox.MailboxUpdate;
-import org.briarproject.bramble.api.mailbox.MailboxUpdateWithMailbox;
-import org.briarproject.bramble.api.mailbox.MailboxVersion;
 import org.briarproject.bramble.api.plugin.TransportId;
 import org.briarproject.bramble.api.properties.TransportProperties;
 import org.briarproject.bramble.api.sync.ClientId;
@@ -35,12 +25,7 @@ import org.briarproject.bramble.api.sync.Message;
 import org.briarproject.bramble.api.sync.MessageId;
 import org.briarproject.bramble.util.IoUtils;

-import java.io.ByteArrayOutputStream;
 import java.io.File;
-import java.io.FileInputStream;
-import java.io.FileOutputStream;
-import java.io.IOException;
-import java.security.NoSuchAlgorithmException;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
@@ -50,9 +35,6 @@ import java.util.Map;
 import java.util.Random;
 import java.util.concurrent.atomic.AtomicInteger;

-import javax.annotation.Nullable;
-import javax.crypto.Cipher;
-
 import static java.util.Arrays.asList;
 import static org.briarproject.bramble.api.crypto.CryptoConstants.MAX_AGREEMENT_PUBLIC_KEY_BYTES;
 import static org.briarproject.bramble.api.crypto.CryptoConstants.MAX_SIGNATURE_PUBLIC_KEY_BYTES;
@@ -63,7 +45,6 @@ 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.util.IoUtils.copyAndClose;
 import static org.briarproject.bramble.util.StringUtils.getRandomString;

 public class TestUtils {
@@ -228,37 +209,6 @@ public class TestUtils {
 				getAgreementPublicKey(), verified);
 	}

-	public static MailboxProperties getMailboxProperties(boolean owner,
-			List<MailboxVersion> serverSupports) {
-		String baseUrl = "http://" + getRandomString(56) + ".onion"; // TODO
-		MailboxAuthToken authToken = new MailboxAuthToken(getRandomId());
-		if (owner) {
-			return new MailboxProperties(baseUrl, authToken, serverSupports);
-		}
-		MailboxFolderId inboxId = new MailboxFolderId(getRandomId());
-		MailboxFolderId outboxId = new MailboxFolderId(getRandomId());
-		return new MailboxProperties(baseUrl, authToken, serverSupports,
-				inboxId, outboxId);
-	}
-
-	public static void writeBytes(File file, byte[] bytes)
-			throws IOException {
-		FileOutputStream outputStream = new FileOutputStream(file);
-		//noinspection TryFinallyCanBeTryWithResources
-		try {
-			outputStream.write(bytes);
-		} finally {
-			outputStream.close();
-		}
-	}
-
-	public static byte[] readBytes(File file) throws IOException {
-		ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
-		FileInputStream inputStream = new FileInputStream(file);
-		copyAndClose(inputStream, outputStream);
-		return outputStream.toByteArray();
-	}
-
 	public static double getMedian(Collection<? extends Number> samples) {
 		int size = samples.size();
 		if (size == 0) throw new IllegalArgumentException();
@@ -293,57 +243,9 @@ public class TestUtils {
 		return Math.sqrt(getVariance(samples));
 	}

-	public static boolean isOptionalTestEnabled(Class<?> testClass) {
+	public static boolean isOptionalTestEnabled(Class testClass) {
 		String optionalTests = System.getenv("OPTIONAL_TESTS");
 		return optionalTests != null &&
 				asList(optionalTests.split(",")).contains(testClass.getName());
 	}
-
-	public static boolean mailboxUpdateEqual(@Nullable MailboxUpdate a,
-			@Nullable MailboxUpdate b) {
-		if (a == null || b == null) {
-			return a == b;
-		}
-		if (!a.hasMailbox() && !b.hasMailbox()) {
-			return a.getClientSupports().equals(b.getClientSupports());
-		} else if (a.hasMailbox() && b.hasMailbox()) {
-			MailboxUpdateWithMailbox am = (MailboxUpdateWithMailbox) a;
-			MailboxUpdateWithMailbox bm = (MailboxUpdateWithMailbox) b;
-			return am.getClientSupports().equals(bm.getClientSupports()) &&
-					mailboxPropertiesEqual(am.getMailboxProperties(),
-							bm.getMailboxProperties());
-		}
-		return false;
-	}
-
-	public static boolean mailboxPropertiesEqual(@Nullable MailboxProperties a,
-			@Nullable MailboxProperties b) {
-		if (a == null || b == null) {
-			return a == b;
-		}
-		return a.getOnion().equals(b.getOnion()) &&
-				a.getAuthToken().equals(b.getAuthToken()) &&
-				a.isOwner() == b.isOwner() &&
-				a.getServerSupports().equals(b.getServerSupports());
-	}
-
-	public static boolean hasEvent(Transaction txn,
-			Class<? extends Event> eventClass) {
-		for (CommitAction action : txn.getActions()) {
-			if (action instanceof EventAction) {
-				Event event = ((EventAction) action).getEvent();
-				if (eventClass.isInstance(event)) return true;
-			}
-		}
-		return false;
-	}
-
-	public static boolean isCryptoStrengthUnlimited() {
-		try {
-			return Cipher.getMaxAllowedKeyLength("AES/CBC/PKCS5Padding")
-					== Integer.MAX_VALUE;
-		} catch (NoSuchAlgorithmException e) {
-			throw new AssertionError();
-		}
-	}
 }
--- a/bramble-api/src/test/java/org/briarproject/bramble/test/ThreadExceptionTest.java
+++ b/bramble-api/src/test/java/org/briarproject/bramble/test/ThreadExceptionTest.java
@@ -1,36 +0,0 @@
-package org.briarproject.bramble.test;
-
-import org.junit.Test;
-
-import static org.junit.Assert.assertNotNull;
-import static org.junit.Assert.fail;
-
-public class ThreadExceptionTest extends BrambleTestCase {
-
-	@Test(expected = AssertionError.class)
-	public void testAssertionErrorMakesTestCaseFail() {
-		// This is what BrambleTestCase does, too:
-		fail();
-	}
-
-	@Test
-	public void testExceptionInThreadMakesTestCaseFail() {
-		Thread t = new Thread(() -> {
-			System.out.println("thread before exception");
-			throw new RuntimeException("boom");
-		});
-
-		t.start();
-		try {
-			t.join();
-			System.out.println("joined thread");
-		} catch (InterruptedException e) {
-			System.out.println("interrupted while joining thread");
-			fail();
-		}
-
-		assertNotNull(exceptionInBackgroundThread);
-		exceptionInBackgroundThread = null;
-	}
-
-}
--- a/bramble-api/witness.gradle
+++ b/bramble-api/witness.gradle
@@ -1,7 +1,6 @@
 dependencyVerification {
    verify = [
        'cglib:cglib:3.2.8:cglib-3.2.8.jar:3f64de999ecc5595dc84ca8ff0879d8a34c8623f9ef3c517a53ed59023fcb9db',
-        'com.fasterxml.jackson.core:jackson-annotations:2.13.0:jackson-annotations-2.13.0.jar:81f9724d8843e8b08f8f6c0609e7a2b030d00c34861c4ac7e2099a7235047d6f',
        'com.google.code.findbugs:annotations:3.0.1:annotations-3.0.1.jar:6b47ff0a6de0ce17cbedc3abb0828ca5bce3009d53ea47b3723ff023c4742f79',
        'com.google.code.findbugs:jsr305:3.0.2:jsr305-3.0.2.jar:766ad2a0783f2687962c8ad74ceecc38a28b9f72a2d085ee438b7813e928d0c7',
        'com.google.dagger:dagger:2.33:dagger-2.33.jar:d8798c5b8cf6b125234e33af5c6293bb9f2208ce29b57924c35b8c0be7b6bdcb',
--- a/bramble-core/build.gradle
+++ b/bramble-core/build.gradle
@@ -9,29 +9,23 @@ apply from: 'witness.gradle'
 apply from: '../dagger.gradle'

 dependencies {
-	implementation project(path: ':bramble-api', configuration: 'default')
-	implementation 'org.bouncycastle:bcprov-jdk15to18:1.70'
-	//noinspection GradleDependency
+	implementation project(path: ':briar:bramble-api', configuration: 'default')
+	implementation 'org.bouncycastle:bcprov-jdk15on:1.69'
 	implementation 'com.h2database:h2:1.4.192' // The last version that supports Java 1.6
 	implementation 'org.bitlet:weupnp:0.1.4'
 	implementation 'net.i2p.crypto:eddsa:0.2.0'
 	implementation 'org.whispersystems:curve25519-java:0.5.0'
-	implementation 'org.briarproject:jtorctl:0.4'
-
-	//noinspection GradleDependency
-	implementation "com.squareup.okhttp3:okhttp:$okhttp_version"
-	implementation "com.fasterxml.jackson.core:jackson-databind:$jackson_version"
+	implementation 'org.briarproject:jtorctl:0.3'

 	annotationProcessor "com.google.dagger:dagger-compiler:$dagger_version"

-	testImplementation project(path: ':bramble-api', configuration: 'testOutput')
+	testImplementation project(path: ':briar:bramble-api', configuration: 'testOutput')
 	testImplementation 'org.hsqldb:hsqldb:2.3.5' // The last version that supports Java 1.6
 	testImplementation 'net.jodah:concurrentunit:0.4.2'
 	testImplementation "junit:junit:$junit_version"
 	testImplementation "org.jmock:jmock:$jmock_version"
 	testImplementation "org.jmock:jmock-junit4:$jmock_version"
-	testImplementation "org.jmock:jmock-imposters:$jmock_version"
-	testImplementation "com.squareup.okhttp3:mockwebserver:4.9.3"
+	testImplementation "org.jmock:jmock-legacy:$jmock_version"

 	testAnnotationProcessor "com.google.dagger:dagger-compiler:$dagger_version"

--- a/bramble-core/src/main/java/org/briarproject/bramble/BrambleCoreEagerSingletons.java
+++ b/bramble-core/src/main/java/org/briarproject/bramble/BrambleCoreEagerSingletons.java
@@ -6,7 +6,6 @@ import org.briarproject.bramble.crypto.CryptoExecutorModule;
 import org.briarproject.bramble.db.DatabaseExecutorModule;
 import org.briarproject.bramble.identity.IdentityModule;
 import org.briarproject.bramble.lifecycle.LifecycleModule;
-import org.briarproject.bramble.mailbox.MailboxModule;
 import org.briarproject.bramble.plugin.PluginModule;
 import org.briarproject.bramble.properties.PropertiesModule;
 import org.briarproject.bramble.rendezvous.RendezvousModule;
@@ -29,8 +28,6 @@ public interface BrambleCoreEagerSingletons {

 	void inject(LifecycleModule.EagerSingletons init);

-	void inject(MailboxModule.EagerSingletons init);
-
 	void inject(PluginModule.EagerSingletons init);

 	void inject(PropertiesModule.EagerSingletons init);
@@ -54,7 +51,6 @@ public interface BrambleCoreEagerSingletons {
 			c.inject(new DatabaseExecutorModule.EagerSingletons());
 			c.inject(new IdentityModule.EagerSingletons());
 			c.inject(new LifecycleModule.EagerSingletons());
-			c.inject(new MailboxModule.EagerSingletons());
 			c.inject(new RendezvousModule.EagerSingletons());
 			c.inject(new PluginModule.EagerSingletons());
 			c.inject(new PropertiesModule.EagerSingletons());
--- a/bramble-core/src/main/java/org/briarproject/bramble/BrambleCoreModule.java
+++ b/bramble-core/src/main/java/org/briarproject/bramble/BrambleCoreModule.java
@@ -14,7 +14,6 @@ import org.briarproject.bramble.identity.IdentityModule;
 import org.briarproject.bramble.io.IoModule;
 import org.briarproject.bramble.keyagreement.KeyAgreementModule;
 import org.briarproject.bramble.lifecycle.LifecycleModule;
-import org.briarproject.bramble.mailbox.MailboxModule;
 import org.briarproject.bramble.plugin.PluginModule;
 import org.briarproject.bramble.properties.PropertiesModule;
 import org.briarproject.bramble.record.RecordModule;
@@ -44,7 +43,6 @@ import dagger.Module;
 		IoModule.class,
 		KeyAgreementModule.class,
 		LifecycleModule.class,
-		MailboxModule.class,
 		PluginModule.class,
 		PropertiesModule.class,
 		RecordModule.class,
--- a/bramble-core/src/main/java/org/briarproject/bramble/client/ClientHelperImpl.java
+++ b/bramble-core/src/main/java/org/briarproject/bramble/client/ClientHelperImpl.java
@@ -1,7 +1,6 @@
 package org.briarproject.bramble.client;

 import org.briarproject.bramble.api.FormatException;
-import org.briarproject.bramble.api.UniqueId;
 import org.briarproject.bramble.api.client.ClientHelper;
 import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.crypto.CryptoComponent;
@@ -23,12 +22,6 @@ import org.briarproject.bramble.api.db.Metadata;
 import org.briarproject.bramble.api.db.Transaction;
 import org.briarproject.bramble.api.identity.Author;
 import org.briarproject.bramble.api.identity.AuthorFactory;
-import org.briarproject.bramble.api.mailbox.MailboxAuthToken;
-import org.briarproject.bramble.api.mailbox.MailboxFolderId;
-import org.briarproject.bramble.api.mailbox.MailboxProperties;
-import org.briarproject.bramble.api.mailbox.MailboxUpdate;
-import org.briarproject.bramble.api.mailbox.MailboxUpdateWithMailbox;
-import org.briarproject.bramble.api.mailbox.MailboxVersion;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.TransportId;
 import org.briarproject.bramble.api.properties.TransportProperties;
@@ -36,16 +29,13 @@ 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.util.Base32;

 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.security.GeneralSecurityException;
-import java.util.ArrayList;
 import java.util.Collection;
 import java.util.HashMap;
-import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;

@@ -56,12 +46,6 @@ import static org.briarproject.bramble.api.client.ContactGroupConstants.GROUP_KE
 import static org.briarproject.bramble.api.identity.Author.FORMAT_VERSION;
 import static org.briarproject.bramble.api.identity.AuthorConstants.MAX_AUTHOR_NAME_LENGTH;
 import static org.briarproject.bramble.api.identity.AuthorConstants.MAX_PUBLIC_KEY_LENGTH;
-import static org.briarproject.bramble.api.mailbox.MailboxUpdateManager.PROP_COUNT;
-import static org.briarproject.bramble.api.mailbox.MailboxUpdateManager.PROP_KEY_AUTHTOKEN;
-import static org.briarproject.bramble.api.mailbox.MailboxUpdateManager.PROP_KEY_INBOXID;
-import static org.briarproject.bramble.api.mailbox.MailboxUpdateManager.PROP_KEY_ONION;
-import static org.briarproject.bramble.api.mailbox.MailboxUpdateManager.PROP_KEY_OUTBOXID;
-import static org.briarproject.bramble.api.mailbox.MailboxUpdateManager.PROP_ONION_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.util.ValidationUtils.checkLength;
@@ -415,69 +399,6 @@ class ClientHelperImpl implements ClientHelper {
 		return tpMap;
 	}

-	@Override
-	public MailboxUpdate parseAndValidateMailboxUpdate(BdfList clientSupports,
-			BdfList serverSupports, BdfDictionary properties)
-			throws FormatException {
-		List<MailboxVersion> clientSupportsList =
-				parseMailboxVersionList(clientSupports);
-		List<MailboxVersion> serverSupportsList =
-				parseMailboxVersionList(serverSupports);
-
-		// We must always learn what Mailbox API version(s) the client supports
-		if (clientSupports.isEmpty()) {
-			throw new FormatException();
-		}
-		if (properties.isEmpty()) {
-			// No mailbox -- cannot claim to support any API versions!
-			if (!serverSupports.isEmpty()) {
-				throw new FormatException();
-			}
-			return new MailboxUpdate(clientSupportsList);
-		}
-		// Mailbox must be accompanied by the Mailbox API version(s) it supports
-		if (serverSupports.isEmpty()) {
-			throw new FormatException();
-		}
-		// Accepting more props than we need, for forward compatibility
-		if (properties.size() < PROP_COUNT) {
-			throw new FormatException();
-		}
-		String onion = properties.getString(PROP_KEY_ONION);
-		checkLength(onion, PROP_ONION_LENGTH);
-		try {
-			Base32.decode(onion, true);
-		} catch (IllegalArgumentException e) {
-			throw new FormatException();
-		}
-		byte[] authToken = properties.getRaw(PROP_KEY_AUTHTOKEN);
-		checkLength(authToken, UniqueId.LENGTH);
-		byte[] inboxId = properties.getRaw(PROP_KEY_INBOXID);
-		checkLength(inboxId, UniqueId.LENGTH);
-		byte[] outboxId = properties.getRaw(PROP_KEY_OUTBOXID);
-		checkLength(outboxId, UniqueId.LENGTH);
-		String baseUrl = "http://" + onion + ".onion"; // TODO
-		MailboxProperties props = new MailboxProperties(baseUrl,
-				new MailboxAuthToken(authToken), serverSupportsList,
-				new MailboxFolderId(inboxId), new MailboxFolderId(outboxId));
-		return new MailboxUpdateWithMailbox(clientSupportsList, props);
-	}
-
-	@Override
-	public List<MailboxVersion> parseMailboxVersionList(BdfList bdfList)
-			throws FormatException {
-		List<MailboxVersion> list = new ArrayList<>();
-		for (int i = 0; i < bdfList.size(); i++) {
-			BdfList element = bdfList.getList(i);
-			if (element.size() != 2) {
-				throw new FormatException();
-			}
-			list.add(new MailboxVersion(element.getLong(0).intValue(),
-					element.getLong(1).intValue()));
-		}
-		return list;
-	}
-
 	@Override
 	public ContactId getContactId(Transaction txn, GroupId contactGroupId)
 			throws DbException {
--- a/bramble-core/src/main/java/org/briarproject/bramble/connection/Connection.java
+++ b/bramble-core/src/main/java/org/briarproject/bramble/connection/Connection.java
@@ -54,7 +54,7 @@ abstract class Connection {
 		}
 	}

-	byte[] readTag(InputStream in) throws IOException {
+	private byte[] readTag(InputStream in) throws IOException {
 		byte[] tag = new byte[TAG_LENGTH];
 		read(in, tag);
 		return tag;
--- a/bramble-core/src/main/java/org/briarproject/bramble/connection/ConnectionManagerImpl.java
+++ b/bramble-core/src/main/java/org/briarproject/bramble/connection/ConnectionManagerImpl.java
@@ -67,15 +67,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 			TransportConnectionReader r) {
 		ioExecutor.execute(new IncomingSimplexSyncConnection(keyManager,
 				connectionRegistry, streamReaderFactory, streamWriterFactory,
-				syncSessionFactory, transportPropertyManager, t, r, null));
-	}
-
-	@Override
-	public void manageIncomingConnection(TransportId t,
-			TransportConnectionReader r, TagController c) {
-		ioExecutor.execute(new IncomingSimplexSyncConnection(keyManager,
-				connectionRegistry, streamReaderFactory, streamWriterFactory,
-				syncSessionFactory, transportPropertyManager, t, r, c));
+				syncSessionFactory, transportPropertyManager, t, r));
 	}

 	@Override
--- a/bramble-core/src/main/java/org/briarproject/bramble/connection/IncomingSimplexSyncConnection.java
+++ b/bramble-core/src/main/java/org/briarproject/bramble/connection/IncomingSimplexSyncConnection.java
@@ -1,9 +1,7 @@
 package org.briarproject.bramble.connection;

-import org.briarproject.bramble.api.connection.ConnectionManager.TagController;
 import org.briarproject.bramble.api.connection.ConnectionRegistry;
 import org.briarproject.bramble.api.contact.ContactId;
-import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.TransportConnectionReader;
 import org.briarproject.bramble.api.plugin.TransportId;
@@ -17,8 +15,6 @@ import org.briarproject.bramble.api.transport.StreamWriterFactory;

 import java.io.IOException;

-import javax.annotation.Nullable;
-
 import static java.util.logging.Level.WARNING;
 import static org.briarproject.bramble.util.LogUtils.logException;

@@ -27,8 +23,6 @@ class IncomingSimplexSyncConnection extends SyncConnection implements Runnable {

 	private final TransportId transportId;
 	private final TransportConnectionReader reader;
-	@Nullable
-	private final TagController tagController;

 	IncomingSimplexSyncConnection(KeyManager keyManager,
 			ConnectionRegistry connectionRegistry,
@@ -36,50 +30,33 @@ class IncomingSimplexSyncConnection extends SyncConnection implements Runnable {
 			StreamWriterFactory streamWriterFactory,
 			SyncSessionFactory syncSessionFactory,
 			TransportPropertyManager transportPropertyManager,
-			TransportId transportId,
-			TransportConnectionReader reader,
-			@Nullable TagController tagController) {
+			TransportId transportId, TransportConnectionReader reader) {
 		super(keyManager, connectionRegistry, streamReaderFactory,
 				streamWriterFactory, syncSessionFactory,
 				transportPropertyManager);
 		this.transportId = transportId;
 		this.reader = reader;
-		this.tagController = tagController;
 	}

 	@Override
 	public void run() {
 		// Read and recognise the tag
-		byte[] tag;
-		StreamContext ctx;
-		try {
-			tag = readTag(reader.getInputStream());
-			// If we have a tag controller, defer marking the tag as recognised
-			if (tagController == null) {
-				ctx = keyManager.getStreamContext(transportId, tag);
-			} else {
-				ctx = keyManager.getStreamContextOnly(transportId, tag);
-			}
-		} catch (IOException | DbException e) {
-			logException(LOG, WARNING, e);
-			onError();
-			return;
-		}
+		StreamContext ctx = recogniseTag(reader, transportId);
 		if (ctx == null) {
 			LOG.info("Unrecognised tag");
-			onError();
+			onError(false);
 			return;
 		}
 		ContactId contactId = ctx.getContactId();
 		if (contactId == null) {
 			LOG.warning("Received rendezvous stream, expected contact");
-			onError(tag);
+			onError(true);
 			return;
 		}
 		if (ctx.isHandshakeMode()) {
 			// TODO: Support handshake mode for contacts
 			LOG.warning("Received handshake tag, expected rotation mode");
-			onError(tag);
+			onError(true);
 			return;
 		}
 		try {
@@ -88,33 +65,15 @@ class IncomingSimplexSyncConnection extends SyncConnection implements Runnable {
 					LOG.info("Ignoring priority for simplex connection");
 			// Create and run the incoming session
 			createIncomingSession(ctx, reader, handler).run();
-			// Success
-			markTagAsRecognisedIfRequired(false, tag);
 			reader.dispose(false, true);
 		} catch (IOException e) {
 			logException(LOG, WARNING, e);
-			onError(tag);
+			onError(true);
 		}
 	}

-	private void onError() {
-		disposeOnError(reader, false);
-	}
-
-	private void onError(byte[] tag) {
-		markTagAsRecognisedIfRequired(true, tag);
-		disposeOnError(reader, true);
-	}
-
-	private void markTagAsRecognisedIfRequired(boolean exception, byte[] tag) {
-		if (tagController != null &&
-				tagController.shouldMarkTagAsRecognised(exception)) {
-			try {
-				keyManager.markTagAsRecognised(transportId, tag);
-			} catch (DbException e) {
-				logException(LOG, WARNING, e);
-			}
-		}
+	private void onError(boolean recognised) {
+		disposeOnError(reader, recognised);
 	}
 }

--- a/bramble-core/src/main/java/org/briarproject/bramble/contact/ContactManagerImpl.java
+++ b/bramble-core/src/main/java/org/briarproject/bramble/contact/ContactManagerImpl.java
@@ -121,40 +121,28 @@ class ContactManagerImpl implements ContactManager, EventListener {

 	@Override
 	public String getHandshakeLink() throws DbException {
-		return db.transactionWithResult(true, this::getHandshakeLink);
-	}
-
-	@Override
-	public String getHandshakeLink(Transaction txn) throws DbException {
-		KeyPair keyPair = identityManager.getHandshakeKeys(txn);
+		KeyPair keyPair = db.transactionWithResult(true,
+				identityManager::getHandshakeKeys);
 		return pendingContactFactory.createHandshakeLink(keyPair.getPublic());
 	}

-	@Override
-	public PendingContact addPendingContact(Transaction txn, String link,
-			String alias)
-			throws DbException, FormatException, GeneralSecurityException {
-		PendingContact p =
-				pendingContactFactory.createPendingContact(link, alias);
-		AuthorId local = identityManager.getLocalAuthor(txn).getId();
-		db.addPendingContact(txn, p, local);
-		KeyPair ourKeyPair = identityManager.getHandshakeKeys(txn);
-		keyManager.addPendingContact(txn, p.getId(), p.getPublicKey(),
-				ourKeyPair);
-		return p;
-	}
-
 	@Override
 	public PendingContact addPendingContact(String link, String alias)
 			throws DbException, FormatException, GeneralSecurityException {
+		PendingContact p =
+				pendingContactFactory.createPendingContact(link, alias);
 		Transaction txn = db.startTransaction(false);
 		try {
-			PendingContact p = addPendingContact(txn, link, alias);
+			AuthorId local = identityManager.getLocalAuthor(txn).getId();
+			db.addPendingContact(txn, p, local);
+			KeyPair ourKeyPair = identityManager.getHandshakeKeys(txn);
+			keyManager.addPendingContact(txn, p.getId(), p.getPublicKey(),
+					ourKeyPair);
 			db.commitTransaction(txn);
-			return p;
 		} finally {
 			db.endTransaction(txn);
 		}
+		return p;
 	}

 	@Override
@@ -166,14 +154,8 @@ class ContactManagerImpl implements ContactManager, EventListener {
 	@Override
 	public Collection<Pair<PendingContact, PendingContactState>> getPendingContacts()
 			throws DbException {
-		return db.transactionWithResult(true, this::getPendingContacts);
-	}
-
-	@Override
-	public Collection<Pair<PendingContact, PendingContactState>> getPendingContacts(
-			Transaction txn)
-			throws DbException {
-		Collection<PendingContact> pendingContacts = db.getPendingContacts(txn);
+		Collection<PendingContact> pendingContacts =
+				db.transactionWithResult(true, db::getPendingContacts);
 		List<Pair<PendingContact, PendingContactState>> pairs =
 				new ArrayList<>(pendingContacts.size());
 		for (PendingContact p : pendingContacts) {
@@ -186,13 +168,7 @@ class ContactManagerImpl implements ContactManager, EventListener {

 	@Override
 	public void removePendingContact(PendingContactId p) throws DbException {
-		db.transaction(false, txn -> removePendingContact(txn, p));
-	}
-
-	@Override
-	public void removePendingContact(Transaction txn, PendingContactId p)
-			throws DbException {
-		db.removePendingContact(txn, p);
+		db.transaction(false, txn -> db.removePendingContact(txn, p));
 		states.remove(p);
 	}

--- a/bramble-core/src/main/java/org/briarproject/bramble/crypto/CryptoComponentImpl.java
+++ b/bramble-core/src/main/java/org/briarproject/bramble/crypto/CryptoComponentImpl.java
@@ -7,8 +7,6 @@ import net.i2p.crypto.eddsa.KeyPairGenerator;
 import org.bouncycastle.crypto.CryptoException;
 import org.bouncycastle.crypto.Digest;
 import org.bouncycastle.crypto.digests.Blake2bDigest;
-import org.bouncycastle.crypto.digests.SHA3Digest;
-import org.briarproject.bramble.api.UniqueId;
 import org.briarproject.bramble.api.crypto.AgreementPrivateKey;
 import org.briarproject.bramble.api.crypto.AgreementPublicKey;
 import org.briarproject.bramble.api.crypto.CryptoComponent;
@@ -23,13 +21,11 @@ import org.briarproject.bramble.api.crypto.SignaturePrivateKey;
 import org.briarproject.bramble.api.crypto.SignaturePublicKey;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.system.SecureRandomProvider;
-import org.briarproject.bramble.util.Base32;
 import org.briarproject.bramble.util.ByteUtils;
 import org.briarproject.bramble.util.StringUtils;
 import org.whispersystems.curve25519.Curve25519;
 import org.whispersystems.curve25519.Curve25519KeyPair;

-import java.nio.charset.Charset;
 import java.security.GeneralSecurityException;
 import java.security.NoSuchAlgorithmException;
 import java.security.Provider;
@@ -42,7 +38,6 @@ import javax.inject.Inject;

 import static java.lang.System.arraycopy;
 import static java.util.logging.Level.INFO;
-import static java.util.logging.Logger.getLogger;
 import static org.briarproject.bramble.api.crypto.CryptoConstants.KEY_TYPE_AGREEMENT;
 import static org.briarproject.bramble.api.crypto.CryptoConstants.KEY_TYPE_SIGNATURE;
 import static org.briarproject.bramble.api.crypto.DecryptionResult.INVALID_CIPHERTEXT;
@@ -56,15 +51,13 @@ import static org.briarproject.bramble.util.LogUtils.now;
 class CryptoComponentImpl implements CryptoComponent {

 	private static final Logger LOG =
-			getLogger(CryptoComponentImpl.class.getName());
+			Logger.getLogger(CryptoComponentImpl.class.getName());

 	private static final int SIGNATURE_KEY_PAIR_BITS = 256;
 	private static final int STORAGE_IV_BYTES = 24; // 196 bits
 	private static final int PBKDF_SALT_BYTES = 32; // 256 bits
 	private static final byte PBKDF_FORMAT_SCRYPT = 0;
 	private static final byte PBKDF_FORMAT_SCRYPT_STRENGTHENED = 1;
-	private static final byte ONION_HS_PROTOCOL_VERSION = 3;
-	private static final int ONION_CHECKSUM_BYTES = 2;

 	private final SecureRandom secureRandom;
 	private final PasswordBasedKdf passwordBasedKdf;
@@ -130,13 +123,6 @@ class CryptoComponentImpl implements CryptoComponent {
 		}
 	}

-	@Override
-	public UniqueId generateUniqueId() {
-		byte[] b = new byte[UniqueId.LENGTH];
-		secureRandom.nextBytes(b);
-		return new UniqueId(b);
-	}
-
 	@Override
 	public SecretKey generateSecretKey() {
 		byte[] b = new byte[SecretKey.LENGTH];
@@ -456,21 +442,4 @@ class CryptoComponentImpl implements CryptoComponent {
 	public String asciiArmour(byte[] b, int lineLength) {
 		return AsciiArmour.wrap(b, lineLength);
 	}
-
-	@Override
-	public String encodeOnion(byte[] publicKey) {
-		Digest digest = new SHA3Digest(256);
-		byte[] label = ".onion checksum".getBytes(Charset.forName("US-ASCII"));
-		digest.update(label, 0, label.length);
-		digest.update(publicKey, 0, publicKey.length);
-		digest.update(ONION_HS_PROTOCOL_VERSION);
-		byte[] checksum = new byte[digest.getDigestSize()];
-		digest.doFinal(checksum, 0);
-		byte[] address = new byte[publicKey.length + ONION_CHECKSUM_BYTES + 1];
-		arraycopy(publicKey, 0, address, 0, publicKey.length);
-		arraycopy(checksum, 0, address, publicKey.length, ONION_CHECKSUM_BYTES);
-		address[address.length - 1] = ONION_HS_PROTOCOL_VERSION;
-		return Base32.encode(address).toLowerCase();
-	}
-
 }
--- a/bramble-core/src/main/java/org/briarproject/bramble/db/Database.java
+++ b/bramble-core/src/main/java/org/briarproject/bramble/db/Database.java
@@ -406,12 +406,6 @@ interface Database<T> {
 	Collection<MessageId> getMessageIds(T txn, GroupId g, Metadata query)
 			throws DbException;

-	/**
-	 * Returns the length of the given message in bytes, including the
-	 * message header.
-	 */
-	int getMessageLength(T txn, MessageId m) throws DbException;
-
 	/**
 	 * Returns the metadata for all delivered messages in the given group.
 	 * <p/>
@@ -502,8 +496,7 @@ interface Database<T> {

 	/**
 	 * Returns the IDs of some messages that are eligible to be sent to the
-	 * given contact. The total length of the messages including record headers
-	 * will be no more than the given capacity.
+	 * given contact, up to the given total length.
 	 * <p/>
 	 * Unlike {@link #getUnackedMessagesToSend(Object, ContactId)} this method
 	 * does not return messages that have already been sent unless they are
@@ -511,20 +504,20 @@ interface Database<T> {
 	 * <p/>
 	 * Read-only.
 	 */
-	Collection<MessageId> getMessagesToSend(T txn, ContactId c, long capacity,
+	Collection<MessageId> getMessagesToSend(T txn, ContactId c, int maxLength,
 			long maxLatency) throws DbException;

 	/**
 	 * Returns the IDs of all messages that are eligible to be sent to the
-	 * given contact.
+	 * given contact, together with their raw lengths.
 	 * <p/>
-	 * Unlike {@link #getMessagesToSend(Object, ContactId, long, long)} this
+	 * Unlike {@link #getMessagesToSend(Object, ContactId, int, long)} this
 	 * method may return messages that have already been sent and are not yet
 	 * due for retransmission.
 	 * <p/>
 	 * Read-only.
 	 */
-	Collection<MessageId> getUnackedMessagesToSend(T txn, ContactId c)
+	Map<MessageId, Integer> getUnackedMessagesToSend(T txn, ContactId c)
 			throws DbException;

 	/**
@@ -605,14 +598,13 @@ interface Database<T> {

 	/**
 	 * Returns the IDs of some messages that are eligible to be sent to the
-	 * given contact and have been requested by the contact. The total length
-	 * of the messages including record headers will be no more than the given
-	 * capacity.
+	 * given contact and have been requested by the contact, up to the given
+	 * total length.
 	 * <p/>
 	 * Read-only.
 	 */
 	Collection<MessageId> getRequestedMessagesToSend(T txn, ContactId c,
-			long capacity, long maxLatency) throws DbException;
+			int maxLength, long maxLatency) throws DbException;

 	/**
 	 * Returns all settings in the given namespace.
@@ -765,14 +757,6 @@ interface Database<T> {
 	 */
 	void resetExpiryTime(T txn, ContactId c, MessageId m) throws DbException;

-	/**
-	 * Resets the transmission count, expiry time and max latency of all
-	 * messages that are eligible to be sent to the given contact. This includes
-	 * messages that have already been sent and are not yet due for
-	 * retransmission.
-	 */
-	void resetUnackedMessagesToSend(T txn, ContactId c) throws DbException;
-
 	/**
 	 * Sets the cleanup timer duration for the given message. This does not
 	 * start the message's cleanup timer.
@@ -857,14 +841,12 @@ interface Database<T> {
 	void stopCleanupTimer(T txn, MessageId m) throws DbException;

 	/**
-	 * Updates the transmission count, expiry time and max latency of the given
-	 * message with respect to the given contact.
-	 *
-	 * @param maxLatency latency of the transport over which the message 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 updateRetransmissionData(T txn, ContactId c, MessageId m,
-			long maxLatency) throws DbException;
+	void updateExpiryTimeAndEta(T txn, ContactId c, MessageId m, long maxLatency)
+			throws DbException;

 	/**
 	 * Stores the given transport keys, deleting any keys they have replaced.
--- a/bramble-core/src/main/java/org/briarproject/bramble/db/DatabaseComponentImpl.java
+++ b/bramble-core/src/main/java/org/briarproject/bramble/db/DatabaseComponentImpl.java
@@ -75,6 +75,7 @@ import org.briarproject.bramble.api.transport.TransportKeys;

 import java.util.ArrayList;
 import java.util.Collection;
+import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.Executor;
@@ -86,7 +87,6 @@ import javax.annotation.Nullable;
 import javax.annotation.concurrent.ThreadSafe;
 import javax.inject.Inject;

-import static java.util.Collections.singletonList;
 import static java.util.logging.Level.WARNING;
 import static java.util.logging.Logger.getLogger;
 import static org.briarproject.bramble.api.sync.Group.Visibility.INVISIBLE;
@@ -424,27 +424,53 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 	@Nullable
 	@Override
 	public Collection<Message> generateBatch(Transaction transaction,
-			ContactId c, long capacity, long maxLatency) throws DbException {
+			ContactId c, int maxLength, long maxLatency) throws DbException {
 		if (transaction.isReadOnly()) throw new IllegalArgumentException();
 		T txn = unbox(transaction);
 		if (!db.containsContact(txn, c))
 			throw new NoSuchContactException();
 		Collection<MessageId> ids =
-				db.getMessagesToSend(txn, c, capacity, maxLatency);
-		if (ids.isEmpty()) return null;
+				db.getMessagesToSend(txn, c, maxLength, maxLatency);
 		long totalLength = 0;
 		List<Message> messages = new ArrayList<>(ids.size());
 		for (MessageId m : ids) {
 			Message message = db.getMessage(txn, m);
 			totalLength += message.getRawLength();
 			messages.add(message);
-			db.updateRetransmissionData(txn, c, m, maxLatency);
+			db.updateExpiryTimeAndEta(txn, c, m, maxLatency);
 		}
+		if (ids.isEmpty()) return null;
 		db.lowerRequestedFlag(txn, c, ids);
 		transaction.attach(new MessagesSentEvent(c, ids, totalLength));
 		return messages;
 	}

+	@Override
+	public Collection<Message> generateBatch(Transaction transaction,
+			ContactId c, Collection<MessageId> ids, long maxLatency)
+			throws DbException {
+		if (transaction.isReadOnly()) throw new IllegalArgumentException();
+		T txn = unbox(transaction);
+		if (!db.containsContact(txn, c))
+			throw new NoSuchContactException();
+		long totalLength = 0;
+		List<Message> messages = new ArrayList<>(ids.size());
+		List<MessageId> sentIds = new ArrayList<>(ids.size());
+		for (MessageId m : ids) {
+			if (db.containsVisibleMessage(txn, c, m)) {
+				Message message = db.getMessage(txn, m);
+				totalLength += message.getRawLength();
+				messages.add(message);
+				sentIds.add(m);
+				db.updateExpiryTimeAndEta(txn, c, m, maxLatency);
+			}
+		}
+		if (messages.isEmpty()) return messages;
+		db.lowerRequestedFlag(txn, c, sentIds);
+		transaction.attach(new MessagesSentEvent(c, sentIds, totalLength));
+		return messages;
+	}
+
 	@Nullable
 	@Override
 	public Offer generateOffer(Transaction transaction, ContactId c,
@@ -457,7 +483,7 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 				db.getMessagesToOffer(txn, c, maxMessages, maxLatency);
 		if (ids.isEmpty()) return null;
 		for (MessageId m : ids)
-			db.updateRetransmissionData(txn, c, m, maxLatency);
+			db.updateExpiryTimeAndEta(txn, c, m, maxLatency);
 		return new Offer(ids);
 	}

@@ -479,22 +505,22 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 	@Nullable
 	@Override
 	public Collection<Message> generateRequestedBatch(Transaction transaction,
-			ContactId c, long capacity, long maxLatency) throws DbException {
+			ContactId c, int maxLength, long maxLatency) throws DbException {
 		if (transaction.isReadOnly()) throw new IllegalArgumentException();
 		T txn = unbox(transaction);
 		if (!db.containsContact(txn, c))
 			throw new NoSuchContactException();
 		Collection<MessageId> ids =
-				db.getRequestedMessagesToSend(txn, c, capacity, maxLatency);
-		if (ids.isEmpty()) return null;
+				db.getRequestedMessagesToSend(txn, c, maxLength, maxLatency);
 		long totalLength = 0;
 		List<Message> messages = new ArrayList<>(ids.size());
 		for (MessageId m : ids) {
 			Message message = db.getMessage(txn, m);
 			totalLength += message.getRawLength();
 			messages.add(message);
-			db.updateRetransmissionData(txn, c, m, maxLatency);
+			db.updateExpiryTimeAndEta(txn, c, m, maxLatency);
 		}
+		if (ids.isEmpty()) return null;
 		db.lowerRequestedFlag(txn, c, ids);
 		transaction.attach(new MessagesSentEvent(c, ids, totalLength));
 		return messages;
@@ -609,24 +635,6 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 		return db.getMessageIds(txn, g, query);
 	}

-	@Override
-	public Collection<MessageId> getMessagesToAck(Transaction transaction,
-			ContactId c, int maxMessages) throws DbException {
-		T txn = unbox(transaction);
-		if (!db.containsContact(txn, c))
-			throw new NoSuchContactException();
-		return db.getMessagesToAck(txn, c, maxMessages);
-	}
-
-	@Override
-	public Collection<MessageId> getMessagesToSend(Transaction transaction,
-			ContactId c, long capacity, long maxLatency) throws DbException {
-		T txn = unbox(transaction);
-		if (!db.containsContact(txn, c))
-			throw new NoSuchContactException();
-		return db.getMessagesToSend(txn, c, capacity, maxLatency);
-	}
-
 	@Override
 	public Collection<MessageId> getMessagesToValidate(Transaction transaction)
 			throws DbException {
@@ -732,44 +740,16 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 		return status;
 	}

-	@Nullable
 	@Override
-	public Message getMessageToSend(Transaction transaction, ContactId c,
-			MessageId m, long maxLatency, boolean markAsSent)
-			throws DbException {
-		if (transaction.isReadOnly()) throw new IllegalArgumentException();
-		T txn = unbox(transaction);
-		if (!db.containsContact(txn, c))
-			throw new NoSuchContactException();
-		if (!db.containsVisibleMessage(txn, c, m)) return null;
-		Message message = db.getMessage(txn, m);
-		if (markAsSent) {
-			db.updateRetransmissionData(txn, c, m, maxLatency);
-			db.lowerRequestedFlag(txn, c, singletonList(m));
-			transaction.attach(new MessagesSentEvent(c, singletonList(m),
-					message.getRawLength()));
-		}
-		return message;
-	}
-
-	@Override
-	public Collection<MessageId> getUnackedMessagesToSend(
-			Transaction transaction, ContactId c) throws DbException {
+	public Map<MessageId, Integer> getUnackedMessagesToSend(
+			Transaction transaction,
+			ContactId c) throws DbException {
 		T txn = unbox(transaction);
 		if (!db.containsContact(txn, c))
 			throw new NoSuchContactException();
 		return db.getUnackedMessagesToSend(txn, c);
 	}

-	@Override
-	public void resetUnackedMessagesToSend(Transaction transaction, ContactId c)
-			throws DbException {
-		T txn = unbox(transaction);
-		if (!db.containsContact(txn, c))
-			throw new NoSuchContactException();
-		db.resetUnackedMessagesToSend(txn, c);
-	}
-
 	@Override
 	public long getUnackedMessageBytesToSend(Transaction transaction,
 			ContactId c) throws DbException {
@@ -1080,20 +1060,6 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 		db.removeTransportKeys(txn, t, k);
 	}

-	@Override
-	public void setAckSent(Transaction transaction, ContactId c,
-			Collection<MessageId> acked) throws DbException {
-		if (transaction.isReadOnly()) throw new IllegalArgumentException();
-		T txn = unbox(transaction);
-		if (!db.containsContact(txn, c))
-			throw new NoSuchContactException();
-		List<MessageId> visible = new ArrayList<>(acked.size());
-		for (MessageId m : acked) {
-			if (db.containsVisibleMessage(txn, c, m)) visible.add(m);
-		}
-		db.lowerAckFlag(txn, c, visible);
-	}
-
 	@Override
 	public void setCleanupTimerDuration(Transaction transaction, MessageId m,
 			long duration) throws DbException {
@@ -1140,7 +1106,7 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 		if (old == INVISIBLE) db.addGroupVisibility(txn, c, g, v == SHARED);
 		else if (v == INVISIBLE) db.removeGroupVisibility(txn, c, g);
 		else db.setGroupVisibility(txn, c, g, v == SHARED);
-		List<ContactId> affected = singletonList(c);
+		List<ContactId> affected = Collections.singletonList(c);
 		transaction.attach(new GroupVisibilityUpdatedEvent(affected));
 	}

@@ -1188,28 +1154,6 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 		transaction.attach(new MessageStateChangedEvent(m, false, state));
 	}

-	@Override
-	public void setMessagesSent(Transaction transaction, ContactId c,
-			Collection<MessageId> sent, long maxLatency) throws DbException {
-		if (transaction.isReadOnly()) throw new IllegalArgumentException();
-		T txn = unbox(transaction);
-		if (!db.containsContact(txn, c))
-			throw new NoSuchContactException();
-		long totalLength = 0;
-		List<MessageId> visible = new ArrayList<>(sent.size());
-		for (MessageId m : sent) {
-			if (db.containsVisibleMessage(txn, c, m)) {
-				visible.add(m);
-				totalLength += db.getMessageLength(txn, m);
-				db.updateRetransmissionData(txn, c, m, maxLatency);
-			}
-		}
-		db.lowerRequestedFlag(txn, c, visible);
-		if (!visible.isEmpty()) {
-			transaction.attach(new MessagesSentEvent(c, visible, totalLength));
-		}
-	}
-
 	@Override
 	public void addMessageDependencies(Transaction transaction,
 			Message dependent, Collection<MessageId> dependencies)
--- a/bramble-core/src/main/java/org/briarproject/bramble/db/DatabaseConstants.java
+++ b/bramble-core/src/main/java/org/briarproject/bramble/db/DatabaseConstants.java
@@ -2,6 +2,8 @@ package org.briarproject.bramble.db;

 import org.briarproject.bramble.api.settings.Settings;

+import static java.util.concurrent.TimeUnit.DAYS;
+
 interface DatabaseConstants {

 	/**
@@ -23,6 +25,19 @@ interface DatabaseConstants {
 	 */
 	String SCHEMA_VERSION_KEY = "schemaVersion";

+	/**
+	 * The {@link Settings} key under which the time of the last database
+	 * compaction is stored.
+	 */
+	String LAST_COMPACTED_KEY = "lastCompacted";
+
+	/**
+	 * The maximum time between database compactions in milliseconds. When the
+	 * database is opened it will be compacted if more than this amount of time
+	 * has passed since the last compaction.
+	 */
+	long MAX_COMPACTION_INTERVAL_MS = DAYS.toMillis(30);
+
 	/**
 	 * The {@link Settings} key under which the flag is stored indicating
 	 * whether the database is marked as dirty.
--- a/bramble-core/src/main/java/org/briarproject/bramble/db/H2Database.java
+++ b/bramble-core/src/main/java/org/briarproject/bramble/db/H2Database.java
@@ -85,17 +85,12 @@ class H2Database extends JdbcDatabase {
 	public void close() throws DbException {
 		// H2 will close the database when the last connection closes
 		Connection c = null;
-		Statement s = null;
 		try {
 			c = createConnection();
-			closeAllConnections();
+			super.closeAllConnections();
 			setDirty(c, false);
-			s = c.createStatement();
-			s.execute("SHUTDOWN COMPACT");
-			s.close();
 			c.close();
 		} catch (SQLException e) {
-			tryToClose(s, LOG, WARNING);
 			tryToClose(c, LOG, WARNING);
 			throw new DbException(e);
 		}
--- a/bramble-core/src/main/java/org/briarproject/bramble/db/HyperSqlDatabase.java
+++ b/bramble-core/src/main/java/org/briarproject/bramble/db/HyperSqlDatabase.java
@@ -79,11 +79,11 @@ class HyperSqlDatabase extends JdbcDatabase {
 		Connection c = null;
 		Statement s = null;
 		try {
-			closeAllConnections();
+			super.closeAllConnections();
 			c = createConnection();
 			setDirty(c, false);
 			s = c.createStatement();
-			s.executeQuery("SHUTDOWN COMPACT");
+			s.executeQuery("SHUTDOWN");
 			s.close();
 			c.close();
 		} catch (SQLException e) {
@@ -106,7 +106,7 @@ class HyperSqlDatabase extends JdbcDatabase {
 		Connection c = null;
 		Statement s = null;
 		try {
-			closeAllConnections();
+			super.closeAllConnections();
 			c = createConnection();
 			s = c.createStatement();
 			s.executeQuery("SHUTDOWN COMPACT");
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Sebastian Kürten	f5728b3d63	Make briar usable as submodule	2021-10-14 09:18:23 +02:00
Sebastian Kürten	be6a9546ea	Provide Tor porst dynamically instead of using hard-coded values 59050 and 59051	2021-10-14 09:03:22 +02:00