Rewrap some lines.

Add checkstyle plugin.
2026-02-12 10:49:06 +01:00 · 2021-11-04 15:49:44 +00:00 · 2021-11-04 15:48:06 +00:00
104 changed files with 850 additions and 1398 deletions
--- a/bramble-android/build.gradle
+++ b/bramble-android/build.gradle
@@ -1,6 +1,7 @@
 import com.android.build.gradle.tasks.MergeResources

 apply plugin: 'com.android.library'
+apply plugin: 'checkstyle'
 apply plugin: 'witness'
 apply from: 'witness.gradle'

@@ -42,8 +43,8 @@ configurations {

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

--- 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
@@ -3,7 +3,6 @@ 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;
@@ -61,7 +60,6 @@ public class AndroidTorPluginFactory implements DuplexPluginFactory {
 	private final File torDirectory;
 	private int torSocksPort;
 	private int torControlPort;
-	private final CryptoComponent crypto;

 	@Inject
 	AndroidTorPluginFactory(@IoExecutor Executor ioExecutor,
@@ -79,8 +77,7 @@ public class AndroidTorPluginFactory implements DuplexPluginFactory {
 			Clock clock,
 			@TorDirectory File torDirectory,
 			@TorSocksPort int torSocksPort,
-			@TorControlPort int torControlPort,
-			CryptoComponent crypto) {
+			@TorControlPort int torControlPort) {
 		this.ioExecutor = ioExecutor;
 		this.wakefulIoExecutor = wakefulIoExecutor;
 		this.app = app;
@@ -97,7 +94,6 @@ public class AndroidTorPluginFactory implements DuplexPluginFactory {
 		this.torDirectory = torDirectory;
 		this.torSocksPort = torSocksPort;
 		this.torControlPort = torControlPort;
-		this.crypto = crypto;
 	}

 	@Override
@@ -139,8 +135,7 @@ public class AndroidTorPluginFactory implements DuplexPluginFactory {

 		Backoff backoff = backoffFactory.createBackoff(MIN_POLLING_INTERVAL,
 				MAX_POLLING_INTERVAL, BACKOFF_BASE);
-		TorRendezvousCrypto torRendezvousCrypto =
-				new TorRendezvousCryptoImpl(crypto);
+		TorRendezvousCrypto torRendezvousCrypto = new TorRendezvousCryptoImpl();
 		AndroidTorPlugin plugin = new AndroidTorPlugin(ioExecutor,
 				wakefulIoExecutor, app, networkManager, locationUtils,
 				torSocketFactory, clock, resourceProvider,
--- a/bramble-android/witness.gradle
+++ b/bramble-android/witness.gradle
@@ -1,161 +1,123 @@
 dependencyVerification {
    verify = [
+        'antlr:antlr:2.7.7:antlr-2.7.7.jar:88fbda4b912596b9f56e8e12e580cc954bacfb51776ecfddd3e18fc1cf56dc4c',
        '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',
        'com.google.jimfs:jimfs:1.1:jimfs-1.1.jar:c4828e28d7c0a930af9387510b3bada7daa5c04d7c25a75c7b8b081f1c257ddd',
        'com.google.protobuf:protobuf-java:3.10.0:protobuf-java-3.10.0.jar:161d7d61a8cb3970891c299578702fd079646e032329d6c2cabf998d191437c9',
        'com.googlecode.json-simple:json-simple:1.1:json-simple-1.1.jar:2d9484f4c649f708f47f9a479465fc729770ee65617dca3011836602264f6439',
+        'com.puppycrawl.tools:checkstyle:8.27:checkstyle-8.27.jar:26c81958a112ebdfc5d7b40507bbfc8f15f606fea1e55ef5675609ddb41a6053',
        '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',
+        'com.sun.xml.fastinfoset:FastInfoset:1.2.15:FastInfoset-1.2.15.jar:785861db11ca1bd0d1956682b974ad73eb19cd3e01a4b3fa82d62eca97210aec',
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-        'org.junit.platform:junit-platform-commons:1.7.0:junit-platform-commons-1.7.0.jar:5330ee87cc7586e6e25175a34e9251624ff12ff525269d3415d0b4ca519b6fea',
-        '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
@@ -3,6 +3,7 @@ sourceCompatibility = 1.8
 targetCompatibility = 1.8

 apply plugin: 'ru.vyarus.animalsniffer'
+apply plugin: 'checkstyle'
 apply plugin: 'witness'
 apply from: 'witness.gradle'

--- a/bramble-api/src/main/java/org/briarproject/bramble/api/cleanup/CleanupHook.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/cleanup/CleanupHook.java
@@ -21,8 +21,9 @@ public interface CleanupHook {
 	 * <p>
 	 * The callee is not required to delete the messages, but the hook won't be
 	 * called again for these messages unless another cleanup timer is set (see
-	 * {@link DatabaseComponent#setCleanupTimerDuration(Transaction, MessageId, long)}
-	 * and {@link DatabaseComponent#startCleanupTimer(Transaction, MessageId)}).
+	 * {@link DatabaseComponent#setCleanupTimerDuration(Transaction, MessageId,
+	 * long)} and {@link DatabaseComponent#startCleanupTimer(Transaction,
+	 * MessageId)}).
 	 */
 	void deleteMessages(Transaction txn, GroupId g,
 			Collection<MessageId> messageIds) throws DbException;
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/cleanup/CleanupManager.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/cleanup/CleanupManager.java
@@ -18,8 +18,8 @@ import org.briarproject.bramble.api.sync.MessageId;
 * {@link CleanupTimerStartedEvent CleanupTimerStartedEvents} broadcast by the
 * {@link DatabaseComponent}.
 * <p>
- * See {@link DatabaseComponent#setCleanupTimerDuration(Transaction, MessageId, long)},
- * {@link DatabaseComponent#startCleanupTimer(Transaction, MessageId)},
+ * See {@link DatabaseComponent#setCleanupTimerDuration(Transaction, MessageId,
+ * long)}, {@link DatabaseComponent#startCleanupTimer(Transaction, MessageId)},
 * {@link DatabaseComponent#stopCleanupTimer(Transaction, MessageId)}.
 */
@NotNullByDefault
--- 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
@@ -128,7 +128,7 @@ public interface ClientHelper {
 	 * 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/crypto/CryptoComponent.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/crypto/CryptoComponent.java
@@ -170,11 +170,4 @@ public interface CryptoComponent {
 	 * length. The line terminator is CRLF.
 	 */
 	String asciiArmour(byte[] b, int lineLength);
-
-	/**
-	 * Encode the onion/hidden service address given its public key. As
-	 * specified here: https://gitweb.torproject.org/torspec.git/tree/rend-spec-v3.txt?id=29245fd5#n2135
-	 */
-	String encodeOnionAddress(byte[] publicKey);
-
 }
--- 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
@@ -1,32 +0,0 @@
-package org.briarproject.bramble.api.mailbox;
-
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-
-import javax.annotation.concurrent.Immutable;
-
-@Immutable
-@NotNullByDefault
-public class MailboxProperties {
-
-	private final String onionAddress, authToken;
-	private final boolean owner;
-
-	public MailboxProperties(String onionAddress, String authToken,
-			boolean owner) {
-		this.onionAddress = onionAddress;
-		this.authToken = authToken;
-		this.owner = owner;
-	}
-
-	public String getOnionAddress() {
-		return onionAddress;
-	}
-
-	public String getAuthToken() {
-		return authToken;
-	}
-
-	public boolean isOwner() {
-		return owner;
-	}
-}
--- 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
@@ -1,26 +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.nullsafety.NotNullByDefault;
-
-import javax.annotation.Nullable;
-
-@NotNullByDefault
-public interface MailboxSettingsManager {
-
-	@Nullable
-	MailboxProperties getOwnMailboxProperties(Transaction txn)
-			throws DbException;
-
-	void setOwnMailboxProperties(Transaction txn, MailboxProperties p)
-			throws DbException;
-
-	MailboxStatus getOwnMailboxStatus(Transaction txn) throws DbException;
-
-	void recordSuccessfulConnection(Transaction txn, long now)
-			throws DbException;
-
-	void recordFailedConnectionAttempt(Transaction txn, long now)
-			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
@@ -1,59 +0,0 @@
-package org.briarproject.bramble.api.mailbox;
-
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-
-import javax.annotation.concurrent.Immutable;
-
-@Immutable
-@NotNullByDefault
-public class MailboxStatus {
-
-	private final long lastAttempt, lastSuccess;
-	private final int attemptsSinceSuccess;
-
-	public MailboxStatus(long lastAttempt, long lastSuccess,
-			int attemptsSinceSuccess) {
-		this.lastAttempt = lastAttempt;
-		this.lastSuccess = lastSuccess;
-		this.attemptsSinceSuccess = attemptsSinceSuccess;
-	}
-
-	/**
-	 * 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;
-	}
-}
--- 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
@@ -1,10 +1,13 @@
 package org.briarproject.bramble.api.plugin;

+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;
@@ -18,7 +21,14 @@ public interface TorConstants {
 	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/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/system/TaskScheduler.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/system/TaskScheduler.java
@@ -35,8 +35,8 @@ public interface TaskScheduler {

 		/**
 		 * 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.
+		 * is {@link #scheduleWithFixedDelay(Runnable, Executor, long, long,
+		 * TimeUnit) periodic}, all future executions of the task are cancelled.
 		 */
 		void cancel();
 	}
--- 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/witness.gradle
+++ b/bramble-api/witness.gradle
@@ -1,15 +1,29 @@
 dependencyVerification {
    verify = [
+        'antlr:antlr:2.7.7:antlr-2.7.7.jar:88fbda4b912596b9f56e8e12e580cc954bacfb51776ecfddd3e18fc1cf56dc4c',
        'cglib:cglib:3.2.8:cglib-3.2.8.jar:3f64de999ecc5595dc84ca8ff0879d8a34c8623f9ef3c517a53ed59023fcb9db',
        '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',
+        'com.google.errorprone:error_prone_annotations:2.3.2:error_prone_annotations-2.3.2.jar:357cd6cfb067c969226c442451502aee13800a24e950fdfde77bcdb4565a668d',
+        'com.google.guava:failureaccess:1.0.1:failureaccess-1.0.1.jar:a171ee4c734dd2da837e4b16be9df4661afab72a41adaf31eb84dfdaf936ca26',
+        '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:1.3:j2objc-annotations-1.3.jar:21af30c92267bd6122c0e0b4d20cccb6641a37eaf956c6540ec471d584e64a7b',
+        'com.puppycrawl.tools:checkstyle:8.27:checkstyle-8.27.jar:26c81958a112ebdfc5d7b40507bbfc8f15f606fea1e55ef5675609ddb41a6053',
+        'commons-beanutils:commons-beanutils:1.9.4:commons-beanutils-1.9.4.jar:7d938c81789028045c08c065e94be75fc280527620d5bd62b519d5838532368a',
+        'commons-collections:commons-collections:3.2.2:commons-collections-3.2.2.jar:eeeae917917144a68a741d4c0dff66aa5c5c5fd85593ff217bced3fc8ca783b8',
+        'info.picocli:picocli:4.1.1:picocli-4.1.1.jar:9238b6af4ded57dcfedf6f7dbcf2bdf334dae2f118ea2a0bd6d05066e63ee6fc',
        'javax.inject:javax.inject:1:javax.inject-1.jar:91c77044a50c481636c32d916fd89c9118a72195390452c81065080f957de7ff',
        'junit:junit:4.13.2:junit-4.13.2.jar:8e495b634469d64fb8acfa3495a065cbacc8a0fff55ce1e31007be4c16dc57d3',
        'net.bytebuddy:byte-buddy:1.9.12:byte-buddy-1.9.12.jar:3688c3d434bebc3edc5516296a2ed0f47b65e451071b4afecad84f902f0efc11',
        'net.jcip:jcip-annotations:1.0:jcip-annotations-1.0.jar:be5805392060c71474bf6c9a67a099471274d30b83eef84bfc4e0889a4f1dcc0',
+        'net.sf.saxon:Saxon-HE:9.9.1-5:Saxon-HE-9.9.1-5.jar:4b39a9e30d5b634b5e91db5f0c6937f176d4517543ababc9b5e01830b8c56620',
+        'org.antlr:antlr4-runtime:4.7.2:antlr4-runtime-4.7.2.jar:4c518b87d4bdff8b44cd8cbc1af816e944b62a3fe5b80b781501cf1f4759bbc4',
        'org.apache-extras.beanshell:bsh:2.0b6:bsh-2.0b6.jar:a17955976070c0573235ee662f2794a78082758b61accffce8d3f8aedcd91047',
+        'org.checkerframework:checker-qual:2.8.1:checker-qual-2.8.1.jar:9103499008bcecd4e948da29b17864abb64304e15706444ae209d17ebe0575df',
        'org.codehaus.mojo.signature:java16:1.1:java16-1.1.signature:53799223a2c98dba2d0add810bed76315460df285c69e4f397ae6098f87dd619',
+        'org.codehaus.mojo:animal-sniffer-annotations:1.18:animal-sniffer-annotations-1.18.jar:47f05852b48ee9baefef80fa3d8cea60efa4753c0013121dd7fe5eef2e5c729d',
        'org.codehaus.mojo:animal-sniffer-ant-tasks:1.20:animal-sniffer-ant-tasks-1.20.jar:bb7d2498144118311d968bb08ff6fae3fc535fb1cb9cca8b8e9ea65b189422ac',
        'org.codehaus.mojo:animal-sniffer:1.20:animal-sniffer-1.20.jar:80c422523c38db91260c6d78e5ee4b012862ab61cc55020c9e243dd7b5c62249',
        'org.hamcrest:hamcrest-core:2.1:hamcrest-core-2.1.jar:e09109e54a289d88506b9bfec987ddd199f4217c9464132668351b9a4f00bee9',
--- a/bramble-core/build.gradle
+++ b/bramble-core/build.gradle
@@ -3,6 +3,7 @@ sourceCompatibility = 1.8
 targetCompatibility = 1.8

 apply plugin: 'ru.vyarus.animalsniffer'
+apply plugin: 'checkstyle'
 apply plugin: 'idea'
 apply plugin: 'witness'
 apply from: 'witness.gradle'
@@ -51,10 +52,3 @@ task jarTest(type: Jar, dependsOn: testClasses) {
 artifacts {
 	testOutput jarTest
 }
-
-test {
-    // for random = context.mock(SecureRandom.class); in PollerImplTest
-    jvmArgs = [
-            '--add-opens', 'java.base/java.security=ALL-UNNAMED',
-    ]
-}
--- 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/crypto/CryptoComponentImpl.java
+++ b/bramble-core/src/main/java/org/briarproject/bramble/crypto/CryptoComponentImpl.java
@@ -7,7 +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.crypto.AgreementPrivateKey;
 import org.briarproject.bramble.api.crypto.AgreementPublicKey;
 import org.briarproject.bramble.api.crypto.CryptoComponent;
@@ -22,13 +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;
@@ -61,8 +58,6 @@ class CryptoComponentImpl implements CryptoComponent {
 	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;
@@ -447,21 +442,4 @@ class CryptoComponentImpl implements CryptoComponent {
 	public String asciiArmour(byte[] b, int lineLength) {
 		return AsciiArmour.wrap(b, lineLength);
 	}
-
-	@Override
-	public String encodeOnionAddress(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
@@ -845,8 +845,8 @@ interface Database<T> {
 	 * of the given message with respect to the given contact, using the latency
 	 * of the transport over which it was sent.
 	 */
-	void updateExpiryTimeAndEta(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/mailbox/MailboxModule.java
+++ b/bramble-core/src/main/java/org/briarproject/bramble/mailbox/MailboxModule.java
@@ -1,16 +0,0 @@
-package org.briarproject.bramble.mailbox;
-
-import org.briarproject.bramble.api.mailbox.MailboxSettingsManager;
-
-import dagger.Module;
-import dagger.Provides;
-
-@Module
-public class MailboxModule {
-
-	@Provides
-	MailboxSettingsManager provideMailboxSettingsManager(
-			MailboxSettingsManagerImpl mailboxSettingsManager) {
-		return mailboxSettingsManager;
-	}
-}
--- a/bramble-core/src/main/java/org/briarproject/bramble/mailbox/MailboxSettingsManagerImpl.java
+++ b/bramble-core/src/main/java/org/briarproject/bramble/mailbox/MailboxSettingsManagerImpl.java
@@ -1,86 +0,0 @@
-package org.briarproject.bramble.mailbox;
-
-import org.briarproject.bramble.api.db.DbException;
-import org.briarproject.bramble.api.db.Transaction;
-import org.briarproject.bramble.api.mailbox.MailboxProperties;
-import org.briarproject.bramble.api.mailbox.MailboxSettingsManager;
-import org.briarproject.bramble.api.mailbox.MailboxStatus;
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.api.settings.Settings;
-import org.briarproject.bramble.api.settings.SettingsManager;
-
-import javax.annotation.concurrent.Immutable;
-import javax.inject.Inject;
-
-import static org.briarproject.bramble.util.StringUtils.isNullOrEmpty;
-
-@Immutable
-@NotNullByDefault
-class MailboxSettingsManagerImpl implements MailboxSettingsManager {
-
-	// Package access for testing
-	static final String SETTINGS_NAMESPACE = "mailbox";
-	static final String SETTINGS_KEY_ONION = "onion";
-	static final String SETTINGS_KEY_TOKEN = "token";
-	static final String SETTINGS_KEY_LAST_ATTEMPT = "lastAttempt";
-	static final String SETTINGS_KEY_LAST_SUCCESS = "lastSuccess";
-	static final String SETTINGS_KEY_ATTEMPTS = "attempts";
-
-	private final SettingsManager settingsManager;
-
-	@Inject
-	MailboxSettingsManagerImpl(SettingsManager settingsManager) {
-		this.settingsManager = settingsManager;
-	}
-
-	@Override
-	public MailboxProperties getOwnMailboxProperties(Transaction txn)
-			throws DbException {
-		Settings s = settingsManager.getSettings(txn, SETTINGS_NAMESPACE);
-		String onion = s.get(SETTINGS_KEY_ONION);
-		String token = s.get(SETTINGS_KEY_TOKEN);
-		if (isNullOrEmpty(onion) || isNullOrEmpty(token)) return null;
-		return new MailboxProperties(onion, token, true);
-	}
-
-	@Override
-	public void setOwnMailboxProperties(Transaction txn, MailboxProperties p)
-			throws DbException {
-		Settings s = new Settings();
-		s.put(SETTINGS_KEY_ONION, p.getOnionAddress());
-		s.put(SETTINGS_KEY_TOKEN, p.getAuthToken());
-		settingsManager.mergeSettings(txn, s, SETTINGS_NAMESPACE);
-	}
-
-	@Override
-	public MailboxStatus getOwnMailboxStatus(Transaction txn)
-			throws DbException {
-		Settings s = settingsManager.getSettings(txn, SETTINGS_NAMESPACE);
-		long lastAttempt = s.getLong(SETTINGS_KEY_LAST_ATTEMPT, -1);
-		long lastSuccess = s.getLong(SETTINGS_KEY_LAST_SUCCESS, -1);
-		int attempts = s.getInt(SETTINGS_KEY_ATTEMPTS, 0);
-		return new MailboxStatus(lastAttempt, lastSuccess, attempts);
-	}
-
-	@Override
-	public void recordSuccessfulConnection(Transaction txn, long now)
-			throws DbException {
-		Settings s = new Settings();
-		s.putLong(SETTINGS_KEY_LAST_ATTEMPT, now);
-		s.putLong(SETTINGS_KEY_LAST_SUCCESS, now);
-		s.putInt(SETTINGS_KEY_ATTEMPTS, 0);
-		settingsManager.mergeSettings(txn, s, SETTINGS_NAMESPACE);
-	}
-
-	@Override
-	public void recordFailedConnectionAttempt(Transaction txn, long now)
-			throws DbException {
-		Settings oldSettings =
-				settingsManager.getSettings(txn, SETTINGS_NAMESPACE);
-		int attempts = oldSettings.getInt(SETTINGS_KEY_ATTEMPTS, 0);
-		Settings newSettings = new Settings();
-		newSettings.putLong(SETTINGS_KEY_LAST_ATTEMPT, now);
-		newSettings.putInt(SETTINGS_KEY_ATTEMPTS, attempts + 1);
-		settingsManager.mergeSettings(txn, newSettings, SETTINGS_NAMESPACE);
-	}
-}
--- a/bramble-core/src/main/java/org/briarproject/bramble/plugin/tor/TorPlugin.java
+++ b/bramble-core/src/main/java/org/briarproject/bramble/plugin/tor/TorPlugin.java
@@ -79,7 +79,9 @@ import static org.briarproject.bramble.api.plugin.TorConstants.DEFAULT_PREF_PLUG
 import static org.briarproject.bramble.api.plugin.TorConstants.DEFAULT_PREF_TOR_MOBILE;
 import static org.briarproject.bramble.api.plugin.TorConstants.DEFAULT_PREF_TOR_NETWORK;
 import static org.briarproject.bramble.api.plugin.TorConstants.DEFAULT_PREF_TOR_ONLY_WHEN_CHARGING;
+import static org.briarproject.bramble.api.plugin.TorConstants.HS_PRIVATE_KEY_V2;
 import static org.briarproject.bramble.api.plugin.TorConstants.HS_PRIVATE_KEY_V3;
+import static org.briarproject.bramble.api.plugin.TorConstants.HS_V3_CREATED;
 import static org.briarproject.bramble.api.plugin.TorConstants.ID;
 import static org.briarproject.bramble.api.plugin.TorConstants.PREF_TOR_MOBILE;
 import static org.briarproject.bramble.api.plugin.TorConstants.PREF_TOR_NETWORK;
@@ -88,10 +90,12 @@ import static org.briarproject.bramble.api.plugin.TorConstants.PREF_TOR_NETWORK_
 import static org.briarproject.bramble.api.plugin.TorConstants.PREF_TOR_NETWORK_WITH_BRIDGES;
 import static org.briarproject.bramble.api.plugin.TorConstants.PREF_TOR_ONLY_WHEN_CHARGING;
 import static org.briarproject.bramble.api.plugin.TorConstants.PREF_TOR_PORT;
+import static org.briarproject.bramble.api.plugin.TorConstants.PROP_ONION_V2;
 import static org.briarproject.bramble.api.plugin.TorConstants.PROP_ONION_V3;
 import static org.briarproject.bramble.api.plugin.TorConstants.REASON_BATTERY;
 import static org.briarproject.bramble.api.plugin.TorConstants.REASON_COUNTRY_BLOCKED;
 import static org.briarproject.bramble.api.plugin.TorConstants.REASON_MOBILE_DATA;
+import static org.briarproject.bramble.api.plugin.TorConstants.V3_MIGRATION_PERIOD_MS;
 import static org.briarproject.bramble.plugin.tor.TorRendezvousCrypto.SEED_BYTES;
 import static org.briarproject.bramble.util.IoUtils.copyAndClose;
 import static org.briarproject.bramble.util.IoUtils.tryToClose;
@@ -111,6 +115,7 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 	private static final String OWNER = "__OwningControllerProcess";
 	private static final int COOKIE_TIMEOUT_MS = 3000;
 	private static final int COOKIE_POLLING_INTERVAL_MS = 200;
+	private static final Pattern ONION_V2 = Pattern.compile("[a-z2-7]{16}");
 	private static final Pattern ONION_V3 = Pattern.compile("[a-z2-7]{56}");

 	private final Executor ioExecutor, wakefulIoExecutor;
@@ -130,8 +135,8 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 	private final int maxIdleTime;
 	private final int socketTimeout;
 	private final File torDirectory, geoIpFile, configFile;
-	private final int torSocksPort;
-	private final int torControlPort;
+	private int torSocksPort;
+	private int torControlPort;
 	private final File doneFile, cookieFile;
 	private final AtomicBoolean used = new AtomicBoolean(false);

@@ -279,7 +284,6 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 					if (LOG.isLoggable(INFO)) listFiles(torDirectory);
 					throw new PluginException();
 				}
-				//noinspection BusyWait
 				Thread.sleep(COOKIE_POLLING_INTERVAL_MS);
 			}
 			LOG.info("Auth cookie created");
@@ -408,7 +412,6 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 		append(strb, "RunAsDaemon", 1);
 		append(strb, "SafeSocks", 1);
 		append(strb, "SocksPort", torSocksPort);
-		//noinspection CharsetObjectCanBeUsed
 		return new ByteArrayInputStream(
 				strb.toString().getBytes(Charset.forName("UTF-8")));
 	}
@@ -475,10 +478,54 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {

 	private void publishHiddenService(String port) {
 		if (!state.isTorRunning()) return;
+		// TODO: Remove support for v2 hidden services after a reasonable
+		// migration period (migration started 2020-06-30)
+		String privKey2 = settings.get(HS_PRIVATE_KEY_V2);
 		String privKey3 = settings.get(HS_PRIVATE_KEY_V3);
+		String v3Created = settings.get(HS_V3_CREATED);
+		// Publish a v2 hidden service if we've already created one, and
+		// either we've never published a v3 hidden service or we're still
+		// in the migration period since first publishing it
+		if (!isNullOrEmpty(privKey2)) {
+			long now = clock.currentTimeMillis();
+			long then = v3Created == null ? now : Long.parseLong(v3Created);
+			if (now - then >= V3_MIGRATION_PERIOD_MS) retireV2HiddenService();
+			else publishV2HiddenService(port, privKey2);
+		}
 		publishV3HiddenService(port, privKey3);
 	}

+	private void publishV2HiddenService(String port, String privKey) {
+		LOG.info("Creating v2 hidden service");
+		Map<Integer, String> portLines = singletonMap(80, "127.0.0.1:" + port);
+		Map<String, String> response;
+		try {
+			response = controlConnection.addOnion(privKey, portLines);
+		} catch (IOException e) {
+			logException(LOG, WARNING, e);
+			return;
+		}
+		if (!response.containsKey(HS_ADDRESS)) {
+			LOG.warning("Tor did not return a hidden service address");
+			return;
+		}
+		String onion2 = response.get(HS_ADDRESS);
+		if (LOG.isLoggable(INFO)) {
+			LOG.info("V2 hidden service " + scrubOnion(onion2));
+		}
+		// The hostname has already been published and the private key stored
+	}
+
+	private void retireV2HiddenService() {
+		LOG.info("Retiring v2 hidden service");
+		TransportProperties p = new TransportProperties();
+		p.put(PROP_ONION_V2, "");
+		callback.mergeLocalProperties(p);
+		Settings s = new Settings();
+		s.put(HS_PRIVATE_KEY_V2, "");
+		callback.mergeSettings(s);
+	}
+
 	private void publishV3HiddenService(String port, @Nullable String privKey) {
 		LOG.info("Creating v3 hidden service");
 		Map<Integer, String> portLines = singletonMap(80, "127.0.0.1:" + port);
@@ -515,6 +562,7 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 			// Save the hidden service's private key for next time
 			Settings s = new Settings();
 			s.put(HS_PRIVATE_KEY_V3, response.get(HS_PRIVKEY));
+			s.put(HS_V3_CREATED, String.valueOf(clock.currentTimeMillis()));
 			callback.mergeSettings(s);
 		}
 	}
@@ -621,30 +669,49 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 	@Override
 	public DuplexTransportConnection createConnection(TransportProperties p) {
 		if (getState() != ACTIVE) return null;
+		// TODO: Remove support for v2 hidden services after a reasonable
+		// migration period (migration started 2020-06-30)
+		String bestOnion = null, version = null;
+		String onion2 = p.get(PROP_ONION_V2);
 		String onion3 = p.get(PROP_ONION_V3);
-		if (onion3 != null && !ONION_V3.matcher(onion3).matches()) {
-			// Don't scrub the address so we can find the problem
-			if (LOG.isLoggable(INFO)) {
-				LOG.info("Invalid v3 hostname: " + onion3);
+		if (!isNullOrEmpty(onion2)) {
+			if (ONION_V2.matcher(onion2).matches()) {
+				bestOnion = onion2;
+				version = "v2";
+			} else {
+				// Don't scrub the address so we can find the problem
+				if (LOG.isLoggable(INFO))
+					LOG.info("Invalid v2 hostname: " + onion2);
 			}
-			onion3 = null;
 		}
-		if (onion3 == null) return null;
+		if (!isNullOrEmpty(onion3)) {
+			if (ONION_V3.matcher(onion3).matches()) {
+				bestOnion = onion3;
+				version = "v3";
+			} else {
+				// Don't scrub the address so we can find the problem
+				if (LOG.isLoggable(INFO))
+					LOG.info("Invalid v3 hostname: " + onion3);
+			}
+		}
+		if (bestOnion == null) return null;
 		Socket s = null;
 		try {
 			if (LOG.isLoggable(INFO)) {
-				LOG.info("Connecting to v3 " + scrubOnion(onion3));
+				LOG.info("Connecting to " + version + " "
+						+ scrubOnion(bestOnion));
 			}
-			s = torSocketFactory.createSocket(onion3 + ".onion", 80);
+			s = torSocketFactory.createSocket(bestOnion + ".onion", 80);
 			s.setSoTimeout(socketTimeout);
 			if (LOG.isLoggable(INFO)) {
-				LOG.info("Connected to v3 " + scrubOnion(onion3));
+				LOG.info("Connected to " + version + " "
+						+ scrubOnion(bestOnion));
 			}
 			return new TorTransportConnection(this, s);
 		} catch (IOException e) {
 			if (LOG.isLoggable(INFO)) {
-				LOG.info("Could not connect to v3 "
-						+ scrubOnion(onion3) + ": " + e.toString());
+				LOG.info("Could not connect to " + version + " "
+						+ scrubOnion(bestOnion) + ": " + e.toString());
 			}
 			tryToClose(s, LOG, WARNING);
 			return null;
@@ -938,17 +1005,17 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 		@Nullable
 		private ServerSocket serverSocket = null;

-		private synchronized void setStarted() {
+		synchronized void setStarted() {
 			started = true;
 			callback.pluginStateChanged(getState());
 		}

-		private synchronized boolean isTorRunning() {
+		synchronized boolean isTorRunning() {
 			return started && !stopped;
 		}

 		@Nullable
-		private synchronized ServerSocket setStopped() {
+		synchronized ServerSocket setStopped() {
 			stopped = true;
 			ServerSocket ss = serverSocket;
 			serverSocket = null;
@@ -956,44 +1023,44 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 			return ss;
 		}

-		private synchronized void setBootstrapped() {
+		synchronized void setBootstrapped() {
 			bootstrapped = true;
 			callback.pluginStateChanged(getState());
 		}

-		private synchronized boolean getAndSetCircuitBuilt() {
+		synchronized boolean getAndSetCircuitBuilt() {
 			boolean firstCircuit = !circuitBuilt;
 			circuitBuilt = true;
 			callback.pluginStateChanged(getState());
 			return firstCircuit;
 		}

-		private synchronized void enableNetwork(boolean enable) {
+		synchronized void enableNetwork(boolean enable) {
 			networkInitialised = true;
 			networkEnabled = enable;
 			if (!enable) circuitBuilt = false;
 			callback.pluginStateChanged(getState());
 		}

-		private synchronized void setReasonsDisabled(int reasonsDisabled) {
+		synchronized void setReasonsDisabled(int reasonsDisabled) {
 			settingsChecked = true;
 			this.reasonsDisabled = reasonsDisabled;
 			callback.pluginStateChanged(getState());
 		}

 		// Doesn't affect getState()
-		private synchronized boolean setServerSocket(ServerSocket ss) {
+		synchronized boolean setServerSocket(ServerSocket ss) {
 			if (stopped || serverSocket != null) return false;
 			serverSocket = ss;
 			return true;
 		}

 		// Doesn't affect getState()
-		private synchronized void clearServerSocket(ServerSocket ss) {
+		synchronized void clearServerSocket(ServerSocket ss) {
 			if (serverSocket == ss) serverSocket = null;
 		}

-		private synchronized State getState() {
+		synchronized State getState() {
 			if (!started || stopped || !settingsChecked) {
 				return STARTING_STOPPING;
 			}
@@ -1003,7 +1070,7 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 			return bootstrapped && circuitBuilt ? ACTIVE : ENABLING;
 		}

-		private synchronized int getReasonsDisabled() {
+		synchronized int getReasonsDisabled() {
 			return getState() == DISABLED ? reasonsDisabled : 0;
 		}
 	}
--- a/bramble-core/src/main/java/org/briarproject/bramble/plugin/tor/TorRendezvousCryptoImpl.java
+++ b/bramble-core/src/main/java/org/briarproject/bramble/plugin/tor/TorRendezvousCryptoImpl.java
@@ -4,26 +4,39 @@ import net.i2p.crypto.eddsa.spec.EdDSANamedCurveSpec;
 import net.i2p.crypto.eddsa.spec.EdDSANamedCurveTable;
 import net.i2p.crypto.eddsa.spec.EdDSAPrivateKeySpec;

+import org.bouncycastle.crypto.Digest;
+import org.bouncycastle.crypto.digests.SHA3Digest;
 import org.bouncycastle.util.encoders.Base64;
-import org.briarproject.bramble.api.crypto.CryptoComponent;
+import org.briarproject.bramble.util.Base32;

 import java.nio.charset.Charset;

-class TorRendezvousCryptoImpl implements TorRendezvousCrypto {
+import static java.lang.System.arraycopy;
+
+public class TorRendezvousCryptoImpl implements TorRendezvousCrypto {

 	private static final EdDSANamedCurveSpec CURVE_SPEC =
 			EdDSANamedCurveTable.getByName("Ed25519");

-	private final CryptoComponent crypto;
-
-	TorRendezvousCryptoImpl(CryptoComponent crypto) {
-		this.crypto = crypto;
-	}
+	private static final byte HS_PROTOCOL_VERSION = 3;
+	private static final int CHECKSUM_BYTES = 2;

 	@Override
 	public String getOnionAddress(byte[] seed) {
 		EdDSAPrivateKeySpec spec = new EdDSAPrivateKeySpec(seed, CURVE_SPEC);
-		return crypto.encodeOnionAddress(spec.getA().toByteArray());
+		byte[] publicKey = spec.getA().toByteArray();
+		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(HS_PROTOCOL_VERSION);
+		byte[] checksum = new byte[digest.getDigestSize()];
+		digest.doFinal(checksum, 0);
+		byte[] address = new byte[publicKey.length + CHECKSUM_BYTES + 1];
+		arraycopy(publicKey, 0, address, 0, publicKey.length);
+		arraycopy(checksum, 0, address, publicKey.length, CHECKSUM_BYTES);
+		address[address.length - 1] = HS_PROTOCOL_VERSION;
+		return Base32.encode(address).toLowerCase();
 	}

 	@Override
--- a/bramble-core/src/main/java/org/briarproject/bramble/settings/SettingsManagerImpl.java
+++ b/bramble-core/src/main/java/org/briarproject/bramble/settings/SettingsManagerImpl.java
@@ -37,10 +37,4 @@ class SettingsManagerImpl implements SettingsManager {
 	public void mergeSettings(Settings s, String namespace) throws DbException {
 		db.transaction(false, txn -> db.mergeSettings(txn, s, namespace));
 	}
-
-	@Override
-	public void mergeSettings(Transaction txn, Settings s, String namespace)
-			throws DbException {
-		db.mergeSettings(txn, s, namespace);
-	}
 }
--- a/bramble-core/src/main/java/org/briarproject/bramble/socks/SocksSocketFactory.java
+++ b/bramble-core/src/main/java/org/briarproject/bramble/socks/SocksSocketFactory.java
@@ -22,7 +22,8 @@ class SocksSocketFactory extends SocketFactory {

 	@Override
 	public Socket createSocket() {
-		return new SocksSocket(proxy, connectToProxyTimeout, extraSocketTimeout);
+		return new SocksSocket(proxy, connectToProxyTimeout,
+				extraSocketTimeout);
 	}

 	@Override
--- a/bramble-core/src/test/java/org/briarproject/bramble/client/ClientHelperImplTest.java
+++ b/bramble-core/src/test/java/org/briarproject/bramble/client/ClientHelperImplTest.java
@@ -24,10 +24,11 @@ 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.test.BrambleMockTestCase;
+import org.briarproject.bramble.test.BrambleTestCase;
 import org.briarproject.bramble.test.DbExpectations;
 import org.briarproject.bramble.util.StringUtils;
 import org.jmock.Expectations;
+import org.jmock.Mockery;
 import org.junit.Test;

 import java.io.ByteArrayOutputStream;
@@ -52,8 +53,9 @@ import static org.junit.Assert.assertArrayEquals;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.fail;

-public class ClientHelperImplTest extends BrambleMockTestCase {
+public class ClientHelperImplTest extends BrambleTestCase {

+	private final Mockery context = new Mockery();
 	private final DatabaseComponent db = context.mock(DatabaseComponent.class);
 	private final MessageFactory messageFactory =
 			context.mock(MessageFactory.class);
@@ -98,6 +100,7 @@ public class ClientHelperImplTest extends BrambleMockTestCase {
 		}});

 		clientHelper.addLocalMessage(message, dictionary, shared);
+		context.assertIsSatisfied();
 	}

 	@Test
@@ -109,6 +112,7 @@ public class ClientHelperImplTest extends BrambleMockTestCase {
 		}});

 		clientHelper.createMessage(groupId, timestamp, list);
+		context.assertIsSatisfied();
 	}

 	@Test
@@ -123,6 +127,7 @@ public class ClientHelperImplTest extends BrambleMockTestCase {
 		}});

 		clientHelper.getMessageAsList(messageId);
+		context.assertIsSatisfied();
 	}

 	@Test
@@ -139,6 +144,7 @@ public class ClientHelperImplTest extends BrambleMockTestCase {

 		assertEquals(dictionary,
 				clientHelper.getGroupMetadataAsDictionary(groupId));
+		context.assertIsSatisfied();
 	}

 	@Test
@@ -155,6 +161,7 @@ public class ClientHelperImplTest extends BrambleMockTestCase {

 		assertEquals(dictionary,
 				clientHelper.getMessageMetadataAsDictionary(messageId));
+		context.assertIsSatisfied();
 	}

 	@Test
@@ -172,6 +179,7 @@ public class ClientHelperImplTest extends BrambleMockTestCase {
 		}});

 		assertEquals(map, clientHelper.getMessageMetadataAsDictionary(groupId));
+		context.assertIsSatisfied();
 	}

 	@Test
@@ -196,6 +204,7 @@ public class ClientHelperImplTest extends BrambleMockTestCase {

 		assertEquals(map,
 				clientHelper.getMessageMetadataAsDictionary(groupId, query));
+		context.assertIsSatisfied();
 	}

 	@Test
@@ -210,6 +219,7 @@ public class ClientHelperImplTest extends BrambleMockTestCase {
 		}});

 		clientHelper.mergeGroupMetadata(groupId, dictionary);
+		context.assertIsSatisfied();
 	}

 	@Test
@@ -224,6 +234,7 @@ public class ClientHelperImplTest extends BrambleMockTestCase {
 		}});

 		clientHelper.mergeMessageMetadata(messageId, dictionary);
+		context.assertIsSatisfied();
 	}

 	@Test
@@ -231,6 +242,7 @@ public class ClientHelperImplTest extends BrambleMockTestCase {
 		byte[] bytes = expectToByteArray(list);

 		assertArrayEquals(bytes, clientHelper.toByteArray(list));
+		context.assertIsSatisfied();
 	}

 	@Test
@@ -238,6 +250,7 @@ public class ClientHelperImplTest extends BrambleMockTestCase {
 		expectToList(true);

 		assertEquals(list, clientHelper.toList(getRandomBytes(123)));
+		context.assertIsSatisfied();
 	}

 	@Test
@@ -249,6 +262,7 @@ public class ClientHelperImplTest extends BrambleMockTestCase {
 			fail();
 		} catch (FormatException e) {
 			// expected
+			context.assertIsSatisfied();
 		}
 	}

@@ -265,6 +279,7 @@ public class ClientHelperImplTest extends BrambleMockTestCase {

 		assertArrayEquals(signature,
 				clientHelper.sign(label, list, privateKey));
+		context.assertIsSatisfied();
 	}

 	@Test
@@ -280,6 +295,7 @@ public class ClientHelperImplTest extends BrambleMockTestCase {
 		}});

 		clientHelper.verifySignature(signature, label, list, publicKey);
+		context.assertIsSatisfied();
 	}

 	@Test
@@ -299,6 +315,7 @@ public class ClientHelperImplTest extends BrambleMockTestCase {
 			fail();
 		} catch (GeneralSecurityException e) {
 			// expected
+			context.assertIsSatisfied();
 		}
 	}

--- a/bramble-core/src/test/java/org/briarproject/bramble/keyagreement/KeyAgreementProtocolTest.java
+++ b/bramble-core/src/test/java/org/briarproject/bramble/keyagreement/KeyAgreementProtocolTest.java
@@ -12,7 +12,6 @@ import org.briarproject.bramble.test.BrambleTestCase;
 import org.jmock.Expectations;
 import org.jmock.auto.Mock;
 import org.jmock.integration.junit4.JUnitRuleMockery;
-import org.jmock.lib.concurrent.Synchroniser;
 import org.jmock.lib.legacy.ClassImposteriser;
 import org.junit.Rule;
 import org.junit.Test;
@@ -36,7 +35,6 @@ public class KeyAgreementProtocolTest extends BrambleTestCase {
 	public JUnitRuleMockery context = new JUnitRuleMockery() {{
 		// So we can mock concrete classes like KeyAgreementTransport
 		setImposteriser(ClassImposteriser.INSTANCE);
-		setThreadingPolicy(new Synchroniser());
 	}};

 	private final PublicKey alicePubKey = getAgreementPublicKey();
--- a/bramble-core/src/test/java/org/briarproject/bramble/mailbox/MailboxSettingsManagerImplTest.java
+++ b/bramble-core/src/test/java/org/briarproject/bramble/mailbox/MailboxSettingsManagerImplTest.java
@@ -1,169 +0,0 @@
-package org.briarproject.bramble.mailbox;
-
-import org.briarproject.bramble.api.db.Transaction;
-import org.briarproject.bramble.api.mailbox.MailboxProperties;
-import org.briarproject.bramble.api.mailbox.MailboxSettingsManager;
-import org.briarproject.bramble.api.mailbox.MailboxStatus;
-import org.briarproject.bramble.api.settings.Settings;
-import org.briarproject.bramble.api.settings.SettingsManager;
-import org.briarproject.bramble.test.BrambleMockTestCase;
-import org.jmock.Expectations;
-import org.junit.Test;
-
-import static org.briarproject.bramble.mailbox.MailboxSettingsManagerImpl.SETTINGS_KEY_ATTEMPTS;
-import static org.briarproject.bramble.mailbox.MailboxSettingsManagerImpl.SETTINGS_KEY_LAST_ATTEMPT;
-import static org.briarproject.bramble.mailbox.MailboxSettingsManagerImpl.SETTINGS_KEY_LAST_SUCCESS;
-import static org.briarproject.bramble.mailbox.MailboxSettingsManagerImpl.SETTINGS_KEY_ONION;
-import static org.briarproject.bramble.mailbox.MailboxSettingsManagerImpl.SETTINGS_KEY_TOKEN;
-import static org.briarproject.bramble.mailbox.MailboxSettingsManagerImpl.SETTINGS_NAMESPACE;
-import static org.briarproject.bramble.util.StringUtils.getRandomString;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertNotNull;
-import static org.junit.Assert.assertNull;
-import static org.junit.Assert.assertTrue;
-
-public class MailboxSettingsManagerImplTest extends BrambleMockTestCase {
-
-	private final SettingsManager settingsManager =
-			context.mock(SettingsManager.class);
-
-	private final MailboxSettingsManager manager =
-			new MailboxSettingsManagerImpl(settingsManager);
-	private final String onion = getRandomString(64);
-	private final String token = getRandomString(64);
-	private final long now = System.currentTimeMillis();
-	private final long lastAttempt = now - 1234;
-	private final long lastSuccess = now - 2345;
-	private final int attempts = 123;
-
-	@Test
-	public void testReturnsNullPropertiesIfSettingsAreEmpty() throws Exception {
-		Transaction txn = new Transaction(null, true);
-		Settings emptySettings = new Settings();
-
-		context.checking(new Expectations() {{
-			oneOf(settingsManager).getSettings(txn, SETTINGS_NAMESPACE);
-			will(returnValue(emptySettings));
-		}});
-
-		assertNull(manager.getOwnMailboxProperties(txn));
-	}
-
-	@Test
-	public void testReturnsProperties() throws Exception {
-		Transaction txn = new Transaction(null, true);
-		Settings settings = new Settings();
-		settings.put(SETTINGS_KEY_ONION, onion);
-		settings.put(SETTINGS_KEY_TOKEN, token);
-
-		context.checking(new Expectations() {{
-			oneOf(settingsManager).getSettings(txn, SETTINGS_NAMESPACE);
-			will(returnValue(settings));
-		}});
-
-		MailboxProperties properties = manager.getOwnMailboxProperties(txn);
-		assertNotNull(properties);
-		assertEquals(onion, properties.getOnionAddress());
-		assertEquals(token, properties.getAuthToken());
-		assertTrue(properties.isOwner());
-	}
-
-	@Test
-	public void testStoresProperties() throws Exception {
-		Transaction txn = new Transaction(null, false);
-		Settings expectedSettings = new Settings();
-		expectedSettings.put(SETTINGS_KEY_ONION, onion);
-		expectedSettings.put(SETTINGS_KEY_TOKEN, token);
-		MailboxProperties properties =
-				new MailboxProperties(onion, token, true);
-
-		context.checking(new Expectations() {{
-			oneOf(settingsManager).mergeSettings(txn, expectedSettings,
-					SETTINGS_NAMESPACE);
-		}});
-
-		manager.setOwnMailboxProperties(txn, properties);
-	}
-
-	@Test
-	public void testReturnsDefaultStatusIfSettingsAreEmpty() throws Exception {
-		Transaction txn = new Transaction(null, true);
-		Settings emptySettings = new Settings();
-
-		context.checking(new Expectations() {{
-			oneOf(settingsManager).getSettings(txn, SETTINGS_NAMESPACE);
-			will(returnValue(emptySettings));
-		}});
-
-		MailboxStatus status = manager.getOwnMailboxStatus(txn);
-		assertEquals(-1, status.getTimeOfLastAttempt());
-		assertEquals(-1, status.getTimeOfLastSuccess());
-		assertEquals(0, status.getAttemptsSinceSuccess());
-	}
-
-	@Test
-	public void testReturnsStatus() throws Exception {
-		Transaction txn = new Transaction(null, true);
-		Settings settings = new Settings();
-		settings.putLong(SETTINGS_KEY_LAST_ATTEMPT, lastAttempt);
-		settings.putLong(SETTINGS_KEY_LAST_SUCCESS, lastSuccess);
-		settings.putInt(SETTINGS_KEY_ATTEMPTS, attempts);
-
-		context.checking(new Expectations() {{
-			oneOf(settingsManager).getSettings(txn, SETTINGS_NAMESPACE);
-			will(returnValue(settings));
-		}});
-
-		MailboxStatus status = manager.getOwnMailboxStatus(txn);
-		assertEquals(lastAttempt, status.getTimeOfLastAttempt());
-		assertEquals(lastSuccess, status.getTimeOfLastSuccess());
-		assertEquals(attempts, status.getAttemptsSinceSuccess());
-	}
-
-	@Test
-	public void testRecordsSuccess() throws Exception {
-		Transaction txn = new Transaction(null, false);
-		Settings expectedSettings = new Settings();
-		expectedSettings.putLong(SETTINGS_KEY_LAST_ATTEMPT, now);
-		expectedSettings.putLong(SETTINGS_KEY_LAST_SUCCESS, now);
-		expectedSettings.putInt(SETTINGS_KEY_ATTEMPTS, 0);
-
-		context.checking(new Expectations() {{
-			oneOf(settingsManager).mergeSettings(txn, expectedSettings,
-					SETTINGS_NAMESPACE);
-		}});
-
-		manager.recordSuccessfulConnection(txn, now);
-	}
-
-	@Test
-	public void testRecordsFailureOnFirstAttempt() throws Exception {
-		testRecordsFailure(new Settings(), 0);
-	}
-
-	@Test
-	public void testRecordsFailureOnLaterAttempt() throws Exception {
-		Settings oldSettings = new Settings();
-		oldSettings.putLong(SETTINGS_KEY_LAST_ATTEMPT, lastAttempt);
-		oldSettings.putLong(SETTINGS_KEY_LAST_SUCCESS, lastSuccess);
-		oldSettings.putInt(SETTINGS_KEY_ATTEMPTS, attempts);
-		testRecordsFailure(oldSettings, attempts);
-	}
-
-	private void testRecordsFailure(Settings oldSettings, int oldAttempts)
-			throws Exception {
-		Transaction txn = new Transaction(null, false);
-		Settings expectedSettings = new Settings();
-		expectedSettings.putLong(SETTINGS_KEY_LAST_ATTEMPT, now);
-		expectedSettings.putInt(SETTINGS_KEY_ATTEMPTS, oldAttempts + 1);
-
-		context.checking(new Expectations() {{
-			oneOf(settingsManager).getSettings(txn, SETTINGS_NAMESPACE);
-			will(returnValue(oldSettings));
-			oneOf(settingsManager).mergeSettings(txn, expectedSettings,
-					SETTINGS_NAMESPACE);
-		}});
-
-		manager.recordFailedConnectionAttempt(txn, now);
-	}
-}
--- a/bramble-core/src/test/java/org/briarproject/bramble/plugin/PluginManagerImplTest.java
+++ b/bramble-core/src/test/java/org/briarproject/bramble/plugin/PluginManagerImplTest.java
@@ -12,8 +12,10 @@ import org.briarproject.bramble.api.plugin.simplex.SimplexPlugin;
 import org.briarproject.bramble.api.plugin.simplex.SimplexPluginFactory;
 import org.briarproject.bramble.api.properties.TransportPropertyManager;
 import org.briarproject.bramble.api.settings.SettingsManager;
-import org.briarproject.bramble.test.BrambleMockTestCase;
+import org.briarproject.bramble.test.BrambleTestCase;
 import org.jmock.Expectations;
+import org.jmock.Mockery;
+import org.jmock.lib.concurrent.Synchroniser;
 import org.junit.Test;

 import java.util.Arrays;
@@ -22,10 +24,13 @@ import java.util.concurrent.Executors;

 import static org.briarproject.bramble.test.TestUtils.getTransportId;

-public class PluginManagerImplTest extends BrambleMockTestCase {
+public class PluginManagerImplTest extends BrambleTestCase {

 	@Test
 	public void testStartAndStop() throws Exception {
+		Mockery context = new Mockery() {{
+			setThreadingPolicy(new Synchroniser());
+		}};
 		Executor ioExecutor = Executors.newSingleThreadExecutor();
 		EventBus eventBus = context.mock(EventBus.class);
 		PluginConfig pluginConfig = context.mock(PluginConfig.class);
@@ -111,5 +116,7 @@ public class PluginManagerImplTest extends BrambleMockTestCase {
 		// Two plugins should be started and stopped
 		p.startService();
 		p.stopService();
+
+		context.assertIsSatisfied();
 	}
 }
--- a/bramble-core/src/test/java/org/briarproject/bramble/transport/StreamReaderImplTest.java
+++ b/bramble-core/src/test/java/org/briarproject/bramble/transport/StreamReaderImplTest.java
@@ -1,17 +1,19 @@
 package org.briarproject.bramble.transport;

 import org.briarproject.bramble.api.crypto.StreamDecrypter;
-import org.briarproject.bramble.test.BrambleMockTestCase;
+import org.briarproject.bramble.test.BrambleTestCase;
 import org.jmock.Expectations;
+import org.jmock.Mockery;
 import org.junit.Test;

 import static org.briarproject.bramble.api.transport.TransportConstants.MAX_PAYLOAD_LENGTH;
 import static org.junit.Assert.assertEquals;

-public class StreamReaderImplTest extends BrambleMockTestCase {
+public class StreamReaderImplTest extends BrambleTestCase {

 	@Test
 	public void testEmptyFramesAreSkipped() throws Exception {
+		Mockery context = new Mockery();
 		StreamDecrypter decrypter = context.mock(StreamDecrypter.class);
 		context.checking(new Expectations() {{
 			oneOf(decrypter).readFrame(with(any(byte[].class)));
@@ -28,11 +30,13 @@ public class StreamReaderImplTest extends BrambleMockTestCase {
 		assertEquals(0, r.read()); // Read another byte
 		assertEquals(-1, r.read()); // Skip the second empty frame, reach EOF
 		assertEquals(-1, r.read()); // Still at EOF
+		context.assertIsSatisfied();
 		r.close();
 	}

 	@Test
 	public void testEmptyFramesAreSkippedWithBuffer() throws Exception {
+		Mockery context = new Mockery();
 		StreamDecrypter decrypter = context.mock(StreamDecrypter.class);
 		context.checking(new Expectations() {{
 			oneOf(decrypter).readFrame(with(any(byte[].class)));
@@ -52,11 +56,13 @@ public class StreamReaderImplTest extends BrambleMockTestCase {
 		assertEquals(-1, r.read(buf));
 		// Still at EOF
 		assertEquals(-1, r.read(buf));
+		context.assertIsSatisfied();
 		r.close();
 	}

 	@Test
 	public void testMultipleReadsPerFrame() throws Exception {
+		Mockery context = new Mockery();
 		StreamDecrypter decrypter = context.mock(StreamDecrypter.class);
 		context.checking(new Expectations() {{
 			oneOf(decrypter).readFrame(with(any(byte[].class)));
@@ -72,11 +78,13 @@ public class StreamReaderImplTest extends BrambleMockTestCase {
 		assertEquals(MAX_PAYLOAD_LENGTH / 2, r.read(buf));
 		// Reach EOF
 		assertEquals(-1, r.read(buf, 0, buf.length));
+		context.assertIsSatisfied();
 		r.close();
 	}

 	@Test
 	public void testMultipleReadsPerFrameWithOffsets() throws Exception {
+		Mockery context = new Mockery();
 		StreamDecrypter decrypter = context.mock(StreamDecrypter.class);
 		context.checking(new Expectations() {{
 			oneOf(decrypter).readFrame(with(any(byte[].class)));
@@ -94,6 +102,7 @@ public class StreamReaderImplTest extends BrambleMockTestCase {
 				MAX_PAYLOAD_LENGTH / 2));
 		// Reach EOF
 		assertEquals(-1, r.read(buf, 0, buf.length));
+		context.assertIsSatisfied();
 		r.close();
 	}
 }
--- a/bramble-core/src/test/java/org/briarproject/bramble/transport/StreamWriterImplTest.java
+++ b/bramble-core/src/test/java/org/briarproject/bramble/transport/StreamWriterImplTest.java
@@ -1,17 +1,19 @@
 package org.briarproject.bramble.transport;

 import org.briarproject.bramble.api.crypto.StreamEncrypter;
-import org.briarproject.bramble.test.BrambleMockTestCase;
+import org.briarproject.bramble.test.BrambleTestCase;
 import org.jmock.Expectations;
+import org.jmock.Mockery;
 import org.junit.Test;

 import static org.briarproject.bramble.api.transport.TransportConstants.MAX_PAYLOAD_LENGTH;
 import static org.junit.Assert.assertEquals;

-public class StreamWriterImplTest extends BrambleMockTestCase {
+public class StreamWriterImplTest extends BrambleTestCase {

 	@Test
 	public void testCloseWithoutWritingWritesFinalFrame() throws Exception {
+		Mockery context = new Mockery();
 		StreamEncrypter encrypter = context.mock(StreamEncrypter.class);
 		context.checking(new Expectations() {{
 			// Write an empty final frame
@@ -22,11 +24,13 @@ public class StreamWriterImplTest extends BrambleMockTestCase {
 		}});
 		StreamWriterImpl w = new StreamWriterImpl(encrypter);
 		w.close();
+		context.assertIsSatisfied();
 	}

 	@Test
 	public void testFlushWithoutBufferedDataWritesFrameAndFlushes()
 			throws Exception {
+		Mockery context = new Mockery();
 		StreamEncrypter encrypter = context.mock(StreamEncrypter.class);
 		StreamWriterImpl w = new StreamWriterImpl(encrypter);
 		context.checking(new Expectations() {{
@@ -47,11 +51,13 @@ public class StreamWriterImplTest extends BrambleMockTestCase {
 			oneOf(encrypter).flush();
 		}});
 		w.close();
+		context.assertIsSatisfied();
 	}

 	@Test
 	public void testFlushWithBufferedDataWritesFrameAndFlushes()
 			throws Exception {
+		Mockery context = new Mockery();
 		StreamEncrypter encrypter = context.mock(StreamEncrypter.class);
 		StreamWriterImpl w = new StreamWriterImpl(encrypter);
 		context.checking(new Expectations() {{
@@ -73,10 +79,12 @@ public class StreamWriterImplTest extends BrambleMockTestCase {
 			oneOf(encrypter).flush();
 		}});
 		w.close();
+		context.assertIsSatisfied();
 	}

 	@Test
 	public void testSingleByteWritesWriteFullFrame() throws Exception {
+		Mockery context = new Mockery();
 		StreamEncrypter encrypter = context.mock(StreamEncrypter.class);
 		StreamWriterImpl w = new StreamWriterImpl(encrypter);
 		context.checking(new Expectations() {{
@@ -95,10 +103,12 @@ public class StreamWriterImplTest extends BrambleMockTestCase {
 			oneOf(encrypter).flush();
 		}});
 		w.close();
+		context.assertIsSatisfied();
 	}

 	@Test
 	public void testMultiByteWritesWriteFullFrames() throws Exception {
+		Mockery context = new Mockery();
 		StreamEncrypter encrypter = context.mock(StreamEncrypter.class);
 		StreamWriterImpl w = new StreamWriterImpl(encrypter);
 		context.checking(new Expectations() {{
@@ -124,10 +134,12 @@ public class StreamWriterImplTest extends BrambleMockTestCase {
 			oneOf(encrypter).flush();
 		}});
 		w.close();
+		context.assertIsSatisfied();
 	}

 	@Test
 	public void testLargeMultiByteWriteWritesFullFrames() throws Exception {
+		Mockery context = new Mockery();
 		StreamEncrypter encrypter = context.mock(StreamEncrypter.class);
 		StreamWriterImpl w = new StreamWriterImpl(encrypter);
 		context.checking(new Expectations() {{
@@ -145,5 +157,6 @@ public class StreamWriterImplTest extends BrambleMockTestCase {
 		w.write(b);
 		// There should be one byte left in the buffer
 		w.close();
+		context.assertIsSatisfied();
 	}
 }
--- a/bramble-core/witness.gradle
+++ b/bramble-core/witness.gradle
@@ -1,5 +1,6 @@
 dependencyVerification {
    verify = [
+        'antlr:antlr:2.7.7:antlr-2.7.7.jar:88fbda4b912596b9f56e8e12e580cc954bacfb51776ecfddd3e18fc1cf56dc4c',
        'cglib:cglib:3.2.8:cglib-3.2.8.jar:3f64de999ecc5595dc84ca8ff0879d8a34c8623f9ef3c517a53ed59023fcb9db',
        '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',
@@ -8,14 +9,21 @@ dependencyVerification {
        '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:2.3.2: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: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',
        'com.h2database:h2:1.4.192:h2-1.4.192.jar:225b22e9857235c46c93861410b60b8c81c10dc8985f4faf188985ba5445126c',
+        'com.puppycrawl.tools:checkstyle:8.27:checkstyle-8.27.jar:26c81958a112ebdfc5d7b40507bbfc8f15f606fea1e55ef5675609ddb41a6053',
        'com.squareup:javapoet:1.13.0:javapoet-1.13.0.jar:4c7517e848a71b36d069d12bb3bf46a70fd4cda3105d822b0ed2e19c00b69291',
+        'commons-beanutils:commons-beanutils:1.9.4:commons-beanutils-1.9.4.jar:7d938c81789028045c08c065e94be75fc280527620d5bd62b519d5838532368a',
+        'commons-collections:commons-collections:3.2.2:commons-collections-3.2.2.jar:eeeae917917144a68a741d4c0dff66aa5c5c5fd85593ff217bced3fc8ca783b8',
+        'info.picocli:picocli:4.1.1:picocli-4.1.1.jar:9238b6af4ded57dcfedf6f7dbcf2bdf334dae2f118ea2a0bd6d05066e63ee6fc',
        'javax.annotation:jsr250-api:1.0:jsr250-api-1.0.jar:a1a922d0d9b6d183ed3800dfac01d1e1eb159f0e8c6f94736931c1def54a941f',
        'javax.inject:javax.inject:1:javax.inject-1.jar:91c77044a50c481636c32d916fd89c9118a72195390452c81065080f957de7ff',
        'junit:junit:4.13.2:junit-4.13.2.jar:8e495b634469d64fb8acfa3495a065cbacc8a0fff55ce1e31007be4c16dc57d3',
@@ -24,14 +32,18 @@ dependencyVerification {
        'net.jcip:jcip-annotations:1.0:jcip-annotations-1.0.jar:be5805392060c71474bf6c9a67a099471274d30b83eef84bfc4e0889a4f1dcc0',
        'net.jodah:concurrentunit:0.4.2:concurrentunit-0.4.2.jar:5583078e1acf91734939e985bc9e7ee947b0e93a8eef679da6bb07bbeb47ced3',
        'net.ltgt.gradle.incap:incap:0.2:incap-0.2.jar:b625b9806b0f1e4bc7a2e3457119488de3cd57ea20feedd513db070a573a4ffd',
+        'net.sf.saxon:Saxon-HE:9.9.1-5:Saxon-HE-9.9.1-5.jar:4b39a9e30d5b634b5e91db5f0c6937f176d4517543ababc9b5e01830b8c56620',
+        'org.antlr:antlr4-runtime:4.7.2:antlr4-runtime-4.7.2.jar:4c518b87d4bdff8b44cd8cbc1af816e944b62a3fe5b80b781501cf1f4759bbc4',
        'org.apache-extras.beanshell:bsh:2.0b6:bsh-2.0b6.jar:a17955976070c0573235ee662f2794a78082758b61accffce8d3f8aedcd91047',
        'org.bitlet:weupnp:0.1.4:weupnp-0.1.4.jar:88df7e6504929d00bdb832863761385c68ab92af945b04f0770b126270a444fb',
        'org.bouncycastle:bcprov-jdk15on:1.69:bcprov-jdk15on-1.69.jar:e469bd39f936999f256002631003ff022a22951da9d5bd9789c7abfa9763a292',
        'org.briarproject:jtorctl:0.3:jtorctl-0.3.jar:f2939238a097898998432effe93b0334d97a787972ab3a91a8973a1d309fc864',
        'org.checkerframework:checker-compat-qual:2.5.3:checker-compat-qual-2.5.3.jar:d76b9afea61c7c082908023f0cbc1427fab9abd2df915c8b8a3e7a509bccbc6d',
        'org.checkerframework:checker-qual:2.5.2:checker-qual-2.5.2.jar:64b02691c8b9d4e7700f8ee2e742dce7ea2c6e81e662b7522c9ee3bf568c040a',
+        'org.checkerframework:checker-qual:2.8.1:checker-qual-2.8.1.jar:9103499008bcecd4e948da29b17864abb64304e15706444ae209d17ebe0575df',
        'org.codehaus.mojo.signature:java16:1.1:java16-1.1.signature:53799223a2c98dba2d0add810bed76315460df285c69e4f397ae6098f87dd619',
        'org.codehaus.mojo:animal-sniffer-annotations:1.17:animal-sniffer-annotations-1.17.jar:92654f493ecfec52082e76354f0ebf87648dc3d5cec2e3c3cdb947c016747a53',
+        'org.codehaus.mojo:animal-sniffer-annotations:1.18:animal-sniffer-annotations-1.18.jar:47f05852b48ee9baefef80fa3d8cea60efa4753c0013121dd7fe5eef2e5c729d',
        'org.codehaus.mojo:animal-sniffer-ant-tasks:1.20:animal-sniffer-ant-tasks-1.20.jar:bb7d2498144118311d968bb08ff6fae3fc535fb1cb9cca8b8e9ea65b189422ac',
        'org.codehaus.mojo:animal-sniffer:1.20:animal-sniffer-1.20.jar:80c422523c38db91260c6d78e5ee4b012862ab61cc55020c9e243dd7b5c62249',
        'org.hamcrest:hamcrest-core:2.1:hamcrest-core-2.1.jar:e09109e54a289d88506b9bfec987ddd199f4217c9464132668351b9a4f00bee9',
--- a/bramble-java/build.gradle
+++ b/bramble-java/build.gradle
@@ -2,6 +2,7 @@ apply plugin: 'java-library'
 sourceCompatibility = 1.8
 targetCompatibility = 1.8

+apply plugin: 'checkstyle'
 apply plugin: 'idea'
 apply plugin: 'witness'
 apply from: 'witness.gradle'
@@ -17,8 +18,8 @@ dependencies {
 	def jna_version = '4.5.2'
 	implementation "net.java.dev.jna:jna:$jna_version"
 	implementation "net.java.dev.jna:jna-platform:$jna_version"
-	tor "org.briarproject:tor:$tor_version"
-	tor "org.briarproject:obfs4proxy:$obfs4proxy_version@zip"
+	tor 'org.briarproject:tor:0.3.5.15'
+	tor 'org.briarproject:obfs4proxy:0.0.12-dev-40245c4a@zip'

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

--- a/bramble-java/src/main/java/org/briarproject/bramble/plugin/modem/CountryCodes.java
+++ b/bramble-java/src/main/java/org/briarproject/bramble/plugin/modem/CountryCodes.java
@@ -81,33 +81,36 @@ class CountryCodes {
 		new Country("GA", "Gabonese Republic", "241", "00", ""),
 		new Country("GB", "United Kingdom", "44", "00", "0"),
 		new Country("GD", "Grenada", "1", "011", "4"),
-		new Country("GE", "Georgia", "995", "8**10", "8"),
-		new Country("GF", "French Guiana", "594", "00", ""),
-		new Country("GH", "Ghana", "233", "00", ""),
-		new Country("GI", "Gibraltar", "350", "00", ""),
-		new Country("GL", "Greenland", "299", "00", ""),
-		new Country("GM", "Gambia", "220", "00", ""),
-		new Country("GN", "Guinea", "224", "00", "0"),
-		new Country("GP", "Guadeloupe", "590", "00", ""),
-		new Country("GQ", "Equatorial Guinea", "240", "00", ""),
-		new Country("GR", "Greece", "30", "00", ""),
-		new Country("GS", "South Georgia and the South Sandwich Islands", "995", "8**10", "8"),
-		new Country("GT", "Guatemala", "502", "00", ""),
-		new Country("GU", "Guam", "1", "011", "1"),
-		new Country("GW", "Guinea-Bissau", "245", "00", ""),
-		new Country("GY", "Guyana", "592", "001", "0"),
-		new Country("HK", "Hong Kong", "852", "001", ""),
-		new Country("HM", "Heard Island and McDonald Islands", "692", "00", "0"),
-		new Country("HN", "Honduras", "504", "00", "0"),
-		new Country("HR", "Croatia", "385", "00", "0"),
-		new Country("HT", "Haiti", "509", "00", "0"),
-		new Country("HU", "Hungary", "36", "00", "06"),
-		new Country("ID", "Indonesia", "62", "001", "0"),
-		new Country("IE", "Ireland", "353", "00", "0"),
-		new Country("IL", "Israel", "972", "00", "0"),
-		new Country("IN", "India", "91", "00", "0"),
-		new Country("IO", "British Indian Ocean Territory", "246", "00", ""),
-		new Country("IQ", "Iraq", "964", "00", "0"),
+			new Country("GE", "Georgia", "995", "8**10", "8"),
+			new Country("GF", "French Guiana", "594", "00", ""),
+			new Country("GH", "Ghana", "233", "00", ""),
+			new Country("GI", "Gibraltar", "350", "00", ""),
+			new Country("GL", "Greenland", "299", "00", ""),
+			new Country("GM", "Gambia", "220", "00", ""),
+			new Country("GN", "Guinea", "224", "00", "0"),
+			new Country("GP", "Guadeloupe", "590", "00", ""),
+			new Country("GQ", "Equatorial Guinea", "240", "00", ""),
+			new Country("GR", "Greece", "30", "00", ""),
+			new Country("GS", "South Georgia and the South Sandwich Islands",
+					"995", "8**10", "8"),
+			new Country("GT", "Guatemala", "502", "00", ""),
+			new Country("GU", "Guam", "1", "011", "1"),
+			new Country("GW", "Guinea-Bissau", "245", "00", ""),
+			new Country("GY", "Guyana", "592", "001", "0"),
+			new Country("HK", "Hong Kong", "852", "001", ""),
+			new Country("HM", "Heard Island and McDonald Islands",
+					"692", "00", "0"),
+			new Country("HN", "Honduras", "504", "00", "0"),
+			new Country("HR", "Croatia", "385", "00", "0"),
+			new Country("HT", "Haiti", "509", "00", "0"),
+			new Country("HU", "Hungary", "36", "00", "06"),
+			new Country("ID", "Indonesia", "62", "001", "0"),
+			new Country("IE", "Ireland", "353", "00", "0"),
+			new Country("IL", "Israel", "972", "00", "0"),
+			new Country("IN", "India", "91", "00", "0"),
+			new Country("IO", "British Indian Ocean Territory", "246", "00",
+					""),
+			new Country("IQ", "Iraq", "964", "00", "0"),
 		new Country("IR", "Iran", "98", "00", "0"),
 		new Country("IS", "Iceland", "354", "00", "0"),
 		new Country("IT", "Italy", "39", "00", ""),
--- a/bramble-java/src/main/java/org/briarproject/bramble/plugin/modem/SerialPortImpl.java
+++ b/bramble-java/src/main/java/org/briarproject/bramble/plugin/modem/SerialPortImpl.java
@@ -28,7 +28,8 @@ class SerialPortImpl implements SerialPort {
 	@Override
 	public void closePort() throws IOException {
 		try {
-			if (!port.closePort()) throw new IOException("Failed to close port");
+			if (!port.closePort())
+				throw new IOException("Failed to close port");
 		} catch (SerialPortException e) {
 			throw new IOException(e);
 		}
--- a/bramble-java/src/main/java/org/briarproject/bramble/plugin/tor/UnixTorPluginFactory.java
+++ b/bramble-java/src/main/java/org/briarproject/bramble/plugin/tor/UnixTorPluginFactory.java
@@ -1,7 +1,6 @@
 package org.briarproject.bramble.plugin.tor;

 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;
@@ -59,7 +58,6 @@ public class UnixTorPluginFactory implements DuplexPluginFactory {
 	private final File torDirectory;
 	private int torSocksPort;
 	private int torControlPort;
-	private final CryptoComponent crypto;

 	@Inject
 	UnixTorPluginFactory(@IoExecutor Executor ioExecutor,
@@ -75,8 +73,7 @@ public class UnixTorPluginFactory implements DuplexPluginFactory {
 			Clock clock,
 			@TorDirectory File torDirectory,
 			@TorSocksPort int torSocksPort,
-			@TorControlPort int torControlPort,
-			CryptoComponent crypto) {
+			@TorControlPort int torControlPort) {
 		this.ioExecutor = ioExecutor;
 		this.wakefulIoExecutor = wakefulIoExecutor;
 		this.networkManager = networkManager;
@@ -91,7 +88,6 @@ public class UnixTorPluginFactory implements DuplexPluginFactory {
 		this.torDirectory = torDirectory;
 		this.torSocksPort = torSocksPort;
 		this.torControlPort = torControlPort;
-		this.crypto = crypto;
 	}

 	@Override
@@ -132,8 +128,7 @@ public class UnixTorPluginFactory implements DuplexPluginFactory {

 		Backoff backoff = backoffFactory.createBackoff(MIN_POLLING_INTERVAL,
 				MAX_POLLING_INTERVAL, BACKOFF_BASE);
-		TorRendezvousCrypto torRendezvousCrypto =
-				new TorRendezvousCryptoImpl(crypto);
+		TorRendezvousCrypto torRendezvousCrypto = new TorRendezvousCryptoImpl();
 		UnixTorPlugin plugin = new UnixTorPlugin(ioExecutor, wakefulIoExecutor,
 				networkManager, locationUtils, torSocketFactory, clock,
 				resourceProvider, circumventionProvider, batteryManager,
--- a/bramble-java/src/test/java/org/briarproject/bramble/plugin/tor/BridgeTest.java
+++ b/bramble-java/src/test/java/org/briarproject/bramble/plugin/tor/BridgeTest.java
@@ -2,7 +2,6 @@ package org.briarproject.bramble.plugin.tor;

 import org.briarproject.bramble.BrambleCoreIntegrationTestEagerSingletons;
 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;
@@ -89,8 +88,6 @@ public class BridgeTest extends BrambleTestCase {
 	BackoffFactory backoffFactory;
 	@Inject
 	Clock clock;
-	@Inject
-	CryptoComponent crypto;

 	private final File torDir = getTestDirectory();
 	private final String bridge;
@@ -145,7 +142,7 @@ public class BridgeTest extends BrambleTestCase {
 				networkManager, locationUtils, eventBus, torSocketFactory,
 				backoffFactory, resourceProvider, bridgeProvider,
 				batteryManager, clock, torDir, DEFAULT_SOCKS_PORT,
-				DEFAULT_CONTROL_PORT, crypto);
+				DEFAULT_CONTROL_PORT);
 	}

 	@After
--- a/bramble-java/witness.gradle
+++ b/bramble-java/witness.gradle
@@ -1,5 +1,6 @@
 dependencyVerification {
    verify = [
+        'antlr:antlr:2.7.7:antlr-2.7.7.jar:88fbda4b912596b9f56e8e12e580cc954bacfb51776ecfddd3e18fc1cf56dc4c',
        'cglib:cglib:3.2.8:cglib-3.2.8.jar:3f64de999ecc5595dc84ca8ff0879d8a34c8623f9ef3c517a53ed59023fcb9db',
        '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',
@@ -8,13 +9,20 @@ dependencyVerification {
        '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:2.3.2: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: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',
+        'com.puppycrawl.tools:checkstyle:8.27:checkstyle-8.27.jar:26c81958a112ebdfc5d7b40507bbfc8f15f606fea1e55ef5675609ddb41a6053',
        'com.squareup:javapoet:1.13.0:javapoet-1.13.0.jar:4c7517e848a71b36d069d12bb3bf46a70fd4cda3105d822b0ed2e19c00b69291',
+        'commons-beanutils:commons-beanutils:1.9.4:commons-beanutils-1.9.4.jar:7d938c81789028045c08c065e94be75fc280527620d5bd62b519d5838532368a',
+        'commons-collections:commons-collections:3.2.2:commons-collections-3.2.2.jar:eeeae917917144a68a741d4c0dff66aa5c5c5fd85593ff217bced3fc8ca783b8',
+        'info.picocli:picocli:4.1.1:picocli-4.1.1.jar:9238b6af4ded57dcfedf6f7dbcf2bdf334dae2f118ea2a0bd6d05066e63ee6fc',
        'javax.annotation:jsr250-api:1.0:jsr250-api-1.0.jar:a1a922d0d9b6d183ed3800dfac01d1e1eb159f0e8c6f94736931c1def54a941f',
        'javax.inject:javax.inject:1:javax.inject-1.jar:91c77044a50c481636c32d916fd89c9118a72195390452c81065080f957de7ff',
        'junit:junit:4.13.2:junit-4.13.2.jar:8e495b634469d64fb8acfa3495a065cbacc8a0fff55ce1e31007be4c16dc57d3',
@@ -23,12 +31,16 @@ dependencyVerification {
        'net.java.dev.jna:jna:4.5.2:jna-4.5.2.jar:0c8eb7acf67261656d79005191debaba3b6bf5dd60a43735a245429381dbecff',
        'net.jcip:jcip-annotations:1.0:jcip-annotations-1.0.jar:be5805392060c71474bf6c9a67a099471274d30b83eef84bfc4e0889a4f1dcc0',
        'net.ltgt.gradle.incap:incap:0.2:incap-0.2.jar:b625b9806b0f1e4bc7a2e3457119488de3cd57ea20feedd513db070a573a4ffd',
+        'net.sf.saxon:Saxon-HE:9.9.1-5:Saxon-HE-9.9.1-5.jar:4b39a9e30d5b634b5e91db5f0c6937f176d4517543ababc9b5e01830b8c56620',
+        'org.antlr:antlr4-runtime:4.7.2:antlr4-runtime-4.7.2.jar:4c518b87d4bdff8b44cd8cbc1af816e944b62a3fe5b80b781501cf1f4759bbc4',
        'org.apache-extras.beanshell:bsh:2.0b6:bsh-2.0b6.jar:a17955976070c0573235ee662f2794a78082758b61accffce8d3f8aedcd91047',
        'org.briarproject:obfs4proxy:0.0.12-dev-40245c4a:obfs4proxy-0.0.12-dev-40245c4a.zip:172029e7058b3a83ac93ac4991a44bf76e16ce8d46f558f5836d57da3cb3a766',
-        'org.briarproject:tor:0.3.5.17:tor-0.3.5.17.jar:ce0e1f4d8f14878e61b23a35a452bc0f2a8e3117ced5a74773cd78475fa7af39',
+        'org.briarproject:tor:0.3.5.15:tor-0.3.5.15.jar:2ff5b5a3b5eaa97d699629ad24ba9584b3199d0ffdb1ea7d8a02de3016b80e7a',
        'org.checkerframework:checker-compat-qual:2.5.3:checker-compat-qual-2.5.3.jar:d76b9afea61c7c082908023f0cbc1427fab9abd2df915c8b8a3e7a509bccbc6d',
        'org.checkerframework:checker-qual:2.5.2:checker-qual-2.5.2.jar:64b02691c8b9d4e7700f8ee2e742dce7ea2c6e81e662b7522c9ee3bf568c040a',
+        'org.checkerframework:checker-qual:2.8.1:checker-qual-2.8.1.jar:9103499008bcecd4e948da29b17864abb64304e15706444ae209d17ebe0575df',
        'org.codehaus.mojo:animal-sniffer-annotations:1.17:animal-sniffer-annotations-1.17.jar:92654f493ecfec52082e76354f0ebf87648dc3d5cec2e3c3cdb947c016747a53',
+        'org.codehaus.mojo:animal-sniffer-annotations:1.18:animal-sniffer-annotations-1.18.jar:47f05852b48ee9baefef80fa3d8cea60efa4753c0013121dd7fe5eef2e5c729d',
        'org.hamcrest:hamcrest-core:2.1:hamcrest-core-2.1.jar:e09109e54a289d88506b9bfec987ddd199f4217c9464132668351b9a4f00bee9',
        'org.hamcrest:hamcrest-library:2.1:hamcrest-library-2.1.jar:b7e2b6895b3b679f0e47b6380fda391b225e9b78505db9d8bdde8d3cc8d52a21',
        'org.hamcrest:hamcrest:2.1:hamcrest-2.1.jar:ba93b2e3a562322ba432f0a1b53addcc55cb188253319a020ed77f824e692050',
--- a/briar-android/build.gradle
+++ b/briar-android/build.gradle
@@ -1,4 +1,5 @@
 apply plugin: 'com.android.application'
+apply plugin: 'checkstyle'
 apply plugin: 'witness'
 apply from: 'witness.gradle'

@@ -136,7 +137,7 @@ dependencies {
 	testImplementation 'androidx.fragment:fragment-testing:1.3.4'
 	testImplementation "androidx.arch.core:core-testing:2.1.0"
 	testImplementation "androidx.test.espresso:espresso-core:$espressoVersion"
-	testImplementation 'org.robolectric:robolectric:4.7.2'
+	testImplementation 'org.robolectric:robolectric:4.3.1'
 	testImplementation 'org.mockito:mockito-core:3.9.0'
 	testImplementation "junit:junit:$junit_version"
 	testImplementation "org.jmock:jmock:$jmock_version"
--- a/briar-android/src/main/java/org/briarproject/briar/android/AppModule.java
+++ b/briar-android/src/main/java/org/briarproject/briar/android/AppModule.java
@@ -43,7 +43,6 @@ import org.briarproject.briar.android.hotspot.HotspotModule;
 import org.briarproject.briar.android.introduction.IntroductionModule;
 import org.briarproject.briar.android.logging.LoggingModule;
 import org.briarproject.briar.android.login.LoginModule;
-import org.briarproject.briar.android.mailbox.MailboxModule;
 import org.briarproject.briar.android.navdrawer.NavDrawerModule;
 import org.briarproject.briar.android.privategroup.conversation.GroupConversationModule;
 import org.briarproject.briar.android.privategroup.list.GroupListModule;
@@ -104,7 +103,6 @@ import static org.briarproject.briar.android.TestingConstants.IS_DEBUG_BUILD;
 		SharingModule.class,
 		HotspotModule.class,
 		TransferDataModule.class,
-		MailboxModule.class,
 })
 public class AppModule {

--- a/briar-android/src/main/java/org/briarproject/briar/android/contact/ContactListItem.java
+++ b/briar-android/src/main/java/org/briarproject/briar/android/contact/ContactListItem.java
@@ -40,10 +40,10 @@ public class ContactListItem extends ContactItem
 				item.unread, item.timestamp);
 	}

-	ContactListItem(ContactListItem item, long timestamp, boolean read) {
+	ContactListItem(ContactListItem item, ConversationMessageHeader h) {
 		this(item.getContact(), item.getAuthorInfo(), item.isConnected(), false,
-				read ? item.unread : item.unread + 1,
-				Math.max(timestamp, item.timestamp));
+				h.isRead() ? item.unread : item.unread + 1,
+				Math.max(h.getTimestamp(), item.timestamp));
 	}

 	/**
--- a/briar-android/src/main/java/org/briarproject/briar/android/contact/ContactsViewModel.java
+++ b/briar-android/src/main/java/org/briarproject/briar/android/contact/ContactsViewModel.java
@@ -28,7 +28,6 @@ import org.briarproject.briar.api.client.MessageTracker;
 import org.briarproject.briar.api.conversation.ConversationManager;
 import org.briarproject.briar.api.conversation.ConversationMessageHeader;
 import org.briarproject.briar.api.conversation.event.ConversationMessageReceivedEvent;
-import org.briarproject.briar.api.conversation.event.ConversationMessageTrackedEvent;
 import org.briarproject.briar.api.identity.AuthorInfo;
 import org.briarproject.briar.api.identity.AuthorManager;

@@ -132,14 +131,13 @@ public class ContactsViewModel extends DbViewModel implements EventListener {
 		} else if (e instanceof ContactRemovedEvent) {
 			LOG.info("Contact removed, removing item");
 			removeItem(((ContactRemovedEvent) e).getContactId());
-		} else if (e instanceof ConversationMessageTrackedEvent) {
-			LOG.info("Conversation message tracked, updating item");
-			ConversationMessageTrackedEvent p =
-					(ConversationMessageTrackedEvent) e;
-			long timestamp = p.getTimestamp();
-			boolean read = p.getRead();
-			updateItem(p.getContactId(),
-					item -> new ContactListItem(item, timestamp, read), true);
+		} else if (e instanceof ConversationMessageReceivedEvent) {
+			LOG.info("Conversation message received, updating item");
+			ConversationMessageReceivedEvent<?> p =
+					(ConversationMessageReceivedEvent<?>) e;
+			ConversationMessageHeader h = p.getMessageHeader();
+			updateItem(p.getContactId(), item -> new ContactListItem(item, h),
+					true);
 		} else if (e instanceof AvatarUpdatedEvent) {
 			AvatarUpdatedEvent a = (AvatarUpdatedEvent) e;
 			updateItem(a.getContactId(), item -> new ContactListItem(item,
--- a/briar-android/src/main/java/org/briarproject/briar/android/contact/add/nearby/AddNearbyContactFragment.java
+++ b/briar-android/src/main/java/org/briarproject/briar/android/contact/add/nearby/AddNearbyContactFragment.java
@@ -20,8 +20,6 @@ import org.briarproject.briar.android.contact.add.nearby.AddContactState.KeyAgre
 import org.briarproject.briar.android.contact.add.nearby.AddContactState.KeyAgreementWaiting;
 import org.briarproject.briar.android.contact.add.nearby.AddContactState.QrCodeScanned;
 import org.briarproject.briar.android.fragment.BaseFragment;
-import org.briarproject.briar.android.qrcode.CameraException;
-import org.briarproject.briar.android.qrcode.CameraView;
 import org.briarproject.briar.android.view.QrCodeView;

 import java.util.logging.Logger;
--- a/briar-android/src/main/java/org/briarproject/briar/android/contact/add/nearby/AddNearbyContactViewModel.java
+++ b/briar-android/src/main/java/org/briarproject/briar/android/contact/add/nearby/AddNearbyContactViewModel.java
@@ -53,8 +53,7 @@ import org.briarproject.briar.android.contact.add.nearby.AddContactState.Contact
 import org.briarproject.briar.android.contact.add.nearby.AddContactState.KeyAgreementListening;
 import org.briarproject.briar.android.contact.add.nearby.AddContactState.KeyAgreementStarted;
 import org.briarproject.briar.android.contact.add.nearby.AddContactState.KeyAgreementWaiting;
-import org.briarproject.briar.android.qrcode.QrCodeDecoder;
-import org.briarproject.briar.android.qrcode.QrCodeUtils;
+import org.briarproject.briar.android.util.QrCodeUtils;
 import org.briarproject.briar.android.viewmodel.LiveEvent;
 import org.briarproject.briar.android.viewmodel.MutableLiveEvent;

--- a/briar-android/src/main/java/org/briarproject/briar/android/contact/add/nearby/CameraException.java
+++ b/briar-android/src/main/java/org/briarproject/briar/android/contact/add/nearby/CameraException.java
@@ -1,8 +1,8 @@
-package org.briarproject.briar.android.qrcode;
+package org.briarproject.briar.android.contact.add.nearby;

 import java.io.IOException;

-public class CameraException extends IOException {
+class CameraException extends IOException {

 	CameraException(String message) {
 		super(message);
--- a/briar-android/src/main/java/org/briarproject/briar/android/contact/add/nearby/CameraView.java
+++ b/briar-android/src/main/java/org/briarproject/briar/android/contact/add/nearby/CameraView.java
@@ -1,4 +1,4 @@
-package org.briarproject.briar.android.qrcode;
+package org.briarproject.briar.android.contact.add.nearby;

 import android.content.Context;
 import android.hardware.Camera;
--- a/briar-android/src/main/java/org/briarproject/briar/android/contact/add/nearby/PreviewConsumer.java
+++ b/briar-android/src/main/java/org/briarproject/briar/android/contact/add/nearby/PreviewConsumer.java
@@ -1,4 +1,4 @@
-package org.briarproject.briar.android.qrcode;
+package org.briarproject.briar.android.contact.add.nearby;

 import android.hardware.Camera;

@@ -7,7 +7,7 @@ import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import androidx.annotation.UiThread;

@NotNullByDefault
-public interface PreviewConsumer {
+interface PreviewConsumer {

 	@UiThread
 	void start(Camera camera, int cameraIndex);
--- a/briar-android/src/main/java/org/briarproject/briar/android/contact/add/nearby/QrCodeDecoder.java
+++ b/briar-android/src/main/java/org/briarproject/briar/android/contact/add/nearby/QrCodeDecoder.java
@@ -1,4 +1,4 @@
-package org.briarproject.briar.android.qrcode;
+package org.briarproject.briar.android.contact.add.nearby;

 import android.hardware.Camera;
 import android.hardware.Camera.CameraInfo;
@@ -32,7 +32,7 @@ import static java.util.logging.Logger.getLogger;

@MethodsNotNullByDefault
@ParametersNotNullByDefault
-public class QrCodeDecoder implements PreviewConsumer, PreviewCallback {
+class QrCodeDecoder implements PreviewConsumer, PreviewCallback {

 	private static final Logger LOG = getLogger(QrCodeDecoder.class.getName());

@@ -44,7 +44,7 @@ public class QrCodeDecoder implements PreviewConsumer, PreviewCallback {
 	private Camera camera = null;
 	private int cameraIndex = 0;

-	public QrCodeDecoder(AndroidExecutor androidExecutor,
+	QrCodeDecoder(AndroidExecutor androidExecutor,
 			@IoExecutor Executor ioExecutor, ResultCallback callback) {
 		this.androidExecutor = androidExecutor;
 		this.ioExecutor = ioExecutor;
@@ -127,7 +127,7 @@ public class QrCodeDecoder implements PreviewConsumer, PreviewCallback {
 	}

 	@NotNullByDefault
-	public interface ResultCallback {
+	interface ResultCallback {
 		@IoExecutor
 		void onQrCodeDecoded(Result result);
 	}
--- a/briar-android/src/main/java/org/briarproject/briar/android/hotspot/HotspotManager.java
+++ b/briar-android/src/main/java/org/briarproject/briar/android/hotspot/HotspotManager.java
@@ -24,7 +24,7 @@ import org.briarproject.bramble.api.settings.SettingsManager;
 import org.briarproject.bramble.api.system.AndroidExecutor;
 import org.briarproject.briar.R;
 import org.briarproject.briar.android.hotspot.HotspotState.NetworkConfig;
-import org.briarproject.briar.android.qrcode.QrCodeUtils;
+import org.briarproject.briar.android.util.QrCodeUtils;

 import java.security.SecureRandom;
 import java.util.concurrent.Executor;
@@ -52,7 +52,7 @@ import static java.util.Objects.requireNonNull;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
 import static java.util.logging.Logger.getLogger;
-import static org.briarproject.briar.android.qrcode.QrCodeUtils.HOTSPOT_QRCODE_FACTOR;
+import static org.briarproject.briar.android.util.QrCodeUtils.HOTSPOT_QRCODE_FACTOR;
 import static org.briarproject.briar.android.util.UiUtils.handleException;

@MethodsNotNullByDefault
--- a/briar-android/src/main/java/org/briarproject/briar/android/hotspot/WebServerManager.java
+++ b/briar-android/src/main/java/org/briarproject/briar/android/hotspot/WebServerManager.java
@@ -8,7 +8,7 @@ import org.briarproject.bramble.api.lifecycle.IoExecutor;
 import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
 import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
 import org.briarproject.briar.android.hotspot.HotspotState.WebsiteConfig;
-import org.briarproject.briar.android.qrcode.QrCodeUtils;
+import org.briarproject.briar.android.util.QrCodeUtils;

 import java.io.IOException;
 import java.net.InetAddress;
@@ -27,7 +27,7 @@ import static java.util.logging.Logger.getLogger;
 import static org.briarproject.bramble.util.LogUtils.logException;
 import static org.briarproject.bramble.util.NetworkUtils.getNetworkInterfaces;
 import static org.briarproject.briar.android.hotspot.WebServer.PORT;
-import static org.briarproject.briar.android.qrcode.QrCodeUtils.HOTSPOT_QRCODE_FACTOR;
+import static org.briarproject.briar.android.util.QrCodeUtils.HOTSPOT_QRCODE_FACTOR;

@MethodsNotNullByDefault
@ParametersNotNullByDefault
--- a/briar-android/src/main/java/org/briarproject/briar/android/mailbox/MailboxModule.java
+++ b/briar-android/src/main/java/org/briarproject/briar/android/mailbox/MailboxModule.java
@@ -1,19 +0,0 @@
-package org.briarproject.briar.android.mailbox;
-
-import org.briarproject.briar.android.viewmodel.ViewModelKey;
-
-import androidx.lifecycle.ViewModel;
-import dagger.Binds;
-import dagger.Module;
-import dagger.multibindings.IntoMap;
-
-@Module
-public interface MailboxModule {
-
-	@Binds
-	@IntoMap
-	@ViewModelKey(MailboxPairViewModel.class)
-	ViewModel bindMailboxViewModel(
-			MailboxPairViewModel mailboxPairViewModel);
-
-}
--- a/briar-android/src/main/java/org/briarproject/briar/android/mailbox/MailboxPairViewModel.java
+++ b/briar-android/src/main/java/org/briarproject/briar/android/mailbox/MailboxPairViewModel.java
@@ -1,95 +0,0 @@
-package org.briarproject.briar.android.mailbox;
-
-import android.app.Application;
-
-import com.google.zxing.Result;
-
-import org.briarproject.bramble.api.crypto.CryptoComponent;
-import org.briarproject.bramble.api.db.DatabaseExecutor;
-import org.briarproject.bramble.api.db.TransactionManager;
-import org.briarproject.bramble.api.lifecycle.IoExecutor;
-import org.briarproject.bramble.api.lifecycle.LifecycleManager;
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.api.system.AndroidExecutor;
-import org.briarproject.bramble.util.StringUtils;
-import org.briarproject.briar.android.qrcode.QrCodeDecoder;
-import org.briarproject.briar.android.viewmodel.DbViewModel;
-
-import java.nio.charset.Charset;
-import java.util.Arrays;
-import java.util.concurrent.Executor;
-import java.util.logging.Logger;
-
-import javax.inject.Inject;
-
-import androidx.annotation.Nullable;
-import androidx.annotation.UiThread;
-
-import static java.util.logging.Level.INFO;
-import static java.util.logging.Logger.getLogger;
-
-@UiThread
-@NotNullByDefault
-class MailboxPairViewModel extends DbViewModel
-		implements QrCodeDecoder.ResultCallback {
-	private static final Logger LOG =
-			getLogger(MailboxPairViewModel.class.getName());
-
-	private static final int VERSION_REQUIRED = 32;
-
-	@SuppressWarnings("CharsetObjectCanBeUsed") // Requires minSdkVersion >= 19
-	private static final Charset ISO_8859_1 = Charset.forName("ISO-8859-1");
-
-	private final CryptoComponent crypto;
-	private final QrCodeDecoder qrCodeDecoder;
-
-	@Nullable
-	private String onionAddress = null;
-	@Nullable
-	private String setupToken = null;
-
-	@Inject
-	MailboxPairViewModel(
-			Application app,
-			@DatabaseExecutor Executor dbExecutor,
-			LifecycleManager lifecycleManager,
-			TransactionManager db,
-			AndroidExecutor androidExecutor,
-			@IoExecutor Executor ioExecutor,
-			CryptoComponent crypto) {
-		super(app, dbExecutor, lifecycleManager, db, androidExecutor);
-		this.crypto = crypto;
-		qrCodeDecoder = new QrCodeDecoder(androidExecutor, ioExecutor, this);
-	}
-
-	@Override
-	public void onQrCodeDecoded(Result result) {
-		LOG.info("Got result from decoder");
-		byte[] bytes = result.getText().getBytes(ISO_8859_1);
-
-		if (LOG.isLoggable(INFO))
-			LOG.info("QR code length in bytes: " + bytes.length);
-		if (bytes.length != 65) {
-			LOG.info("QR code has wrong length");
-			return;
-		}
-
-		if (LOG.isLoggable(INFO))
-			LOG.info("QR code version: " + bytes[0]);
-		if (bytes[0] != VERSION_REQUIRED) {
-			LOG.info("QR code has wrong version");
-			return;
-		}
-
-		byte[] onionPubKey = Arrays.copyOfRange(bytes, 1, 33);
-		onionAddress = crypto.encodeOnionAddress(onionPubKey);
-		setupToken = StringUtils.toHexString(Arrays.copyOfRange(bytes, 33, 65))
-				.toLowerCase();
-		LOG.info("QR code is valid");
-	}
-
-	QrCodeDecoder getQrCodeDecoder() {
-		return qrCodeDecoder;
-	}
-
-}
--- a/briar-android/src/main/java/org/briarproject/briar/android/qrcode/QrCodeUtils.java
+++ b/briar-android/src/main/java/org/briarproject/briar/android/qrcode/QrCodeUtils.java
@@ -1,4 +1,4 @@
-package org.briarproject.briar.android.qrcode;
+package org.briarproject.briar.android.util;

 import android.graphics.Bitmap;
 import android.util.DisplayMetrics;
@@ -23,10 +23,11 @@ import static org.briarproject.bramble.util.LogUtils.logException;

@NotNullByDefault
 public class QrCodeUtils {
-	public static final double HOTSPOT_QRCODE_FACTOR = 0.35;

 	private static final Logger LOG = getLogger(QrCodeUtils.class.getName());

+	public static final double HOTSPOT_QRCODE_FACTOR = 0.35;
+
 	@Nullable
 	public static Bitmap createQrCode(DisplayMetrics dm, String input) {
 		return createQrCode(Math.min(dm.widthPixels, dm.heightPixels), input);
--- a/briar-android/src/main/java/org/briarproject/briar/android/view/AuthorView.java
+++ b/briar-android/src/main/java/org/briarproject/briar/android/view/AuthorView.java
@@ -93,7 +93,7 @@ public class AuthorView extends ConstraintLayout {
 		if (authorInfo.getStatus() == OURSELVES) {
 			authorName.setTypeface(authorNameTypeface, BOLD);
 		} else {
-			authorName.setTypeface(authorNameTypeface, Typeface.NORMAL);
+			authorName.setTypeface(authorNameTypeface, NORMAL);
 		}

 		invalidate();
--- a/briar-android/src/main/res/layout/fragment_keyagreement_qr.xml
+++ b/briar-android/src/main/res/layout/fragment_keyagreement_qr.xml
@@ -5,7 +5,7 @@
 	android:layout_height="match_parent"
 	android:keepScreenOn="true">

-	<org.briarproject.briar.android.qrcode.CameraView
+	<org.briarproject.briar.android.contact.add.nearby.CameraView
 		android:id="@+id/camera_view"
 		android:layout_width="match_parent"
 		android:layout_height="match_parent" />
--- a/briar-android/src/test/java/org/briarproject/briar/android/account/SetupActivityTest.java
+++ b/briar-android/src/test/java/org/briarproject/briar/android/account/SetupActivityTest.java
@@ -41,11 +41,7 @@ import static org.briarproject.briar.android.login.StrengthMeter.YELLOW;
 import static org.hamcrest.Matchers.not;

@RunWith(AndroidJUnit4.class)
-@Config(sdk = 21,
-		instrumentedPackages = {
-				// required to access final members on androidx.loader.content.ModernAsyncTask
-				"androidx.loader.content"
-		})
+@Config(sdk = 21)
 public class SetupActivityTest {

 	@Rule
--- a/briar-android/src/test/java/org/briarproject/briar/android/login/ChangePasswordActivityTest.java
+++ b/briar-android/src/test/java/org/briarproject/briar/android/login/ChangePasswordActivityTest.java
@@ -35,11 +35,7 @@ import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;

@RunWith(RobolectricTestRunner.class)
-@Config(sdk = 21,
-		instrumentedPackages = {
-				// required to access final members on androidx.loader.content.ModernAsyncTask
-				"androidx.loader.content"
-		})
+@Config(sdk = 21)
 public class ChangePasswordActivityTest {

 	private ChangePasswordActivity changePasswordActivity;
@@ -121,8 +117,7 @@ public class ChangePasswordActivityTest {
 		verify(viewModel, times(1)).changePassword(eq(curPass), eq(safePass));
 		// Return the result
 		result.postEvent(SUCCESS);
-		// TODO: this needs to be enabled again
-		// assertTrue(changePasswordActivity.isFinishing());
+		assertTrue(changePasswordActivity.isFinishing());
 	}

 	@Test
--- a/briar-android/src/test/java/org/briarproject/briar/android/privategroup/list/GroupListViewModelTest.java
+++ b/briar-android/src/test/java/org/briarproject/briar/android/privategroup/list/GroupListViewModelTest.java
@@ -36,8 +36,8 @@ import java.util.concurrent.Executor;

 import androidx.arch.core.executor.testing.InstantTaskExecutorRule;

-import static java.util.Collections.emptyList;
-import static java.util.Collections.singletonList;
+import static edu.emory.mathcs.backport.java.util.Collections.emptyList;
+import static edu.emory.mathcs.backport.java.util.Collections.singletonList;
 import static org.briarproject.bramble.test.TestUtils.getAuthor;
 import static org.briarproject.bramble.test.TestUtils.getContact;
 import static org.briarproject.bramble.test.TestUtils.getGroup;
--- a/briar-android/witness.gradle
+++ b/briar-android/witness.gradle
@@ -57,7 +57,6 @@ dependencyVerification {
        'androidx.test.uiautomator:uiautomator:2.2.0:uiautomator-2.2.0.aar:2838e9d961dbffefbbd229a2bd4f6f82ac4fb2462975862a9e75e9ed325a3197',
        'androidx.test:core:1.3.0:core-1.3.0.aar:86549cae8c5b848f817e2c716e174c7dab61caf0b4df9848680eeb753089a337',
        'androidx.test:monitor:1.3.0:monitor-1.3.0.aar:f73a31306a783e63150c60c49e140dc38da39a1b7947690f4b73387b5ebad77e',
-        'androidx.test:monitor:1.4.0:monitor-1.4.0.aar:46a912a1e175f27a97521af3f50e5af87c22c49275dd2c57c043740012806325',
        'androidx.test:orchestrator:1.3.0:orchestrator-1.3.0.apk:676f808d08a3d05050eae30c3b7d92ce5cef1e00a54d68355bb7e7d4b72366fe',
        'androidx.test:rules:1.3.0:rules-1.3.0.aar:c1753946c498b0d5d7cf341cfed661f66915c4c9deb4ed10462a08ae33b2429a',
        'androidx.test:runner:1.3.0:runner-1.3.0.aar:61d13f5a9fcbbd73ba18fa84e1d6a0111c6e1c665a89b418126966e61fffd93b',
@@ -68,208 +67,191 @@ dependencyVerification {
        'androidx.versionedparcelable:versionedparcelable:1.1.0:versionedparcelable-1.1.0.aar:9a1d77140ac222b7866b5054ee7d159bc1800987ed2d46dd6afdd145abb710c1',
        'androidx.viewpager2:viewpager2:1.0.0:viewpager2-1.0.0.aar:e95c0031d4cc247cd48196c6287e58d2cee54d9c79b85afea7c90920330275af',
        'androidx.viewpager:viewpager:1.0.0:viewpager-1.0.0.aar:147af4e14a1984010d8f155e5e19d781f03c1d70dfed02a8e0d18428b8fc8682',
+        'antlr:antlr:2.7.7:antlr-2.7.7.jar:88fbda4b912596b9f56e8e12e580cc954bacfb51776ecfddd3e18fc1cf56dc4c',
+        'backport-util-concurrent:backport-util-concurrent:3.1:backport-util-concurrent-3.1.jar:f5759b7fcdfc83a525a036deedcbd32e5b536b625ebc282426f16ca137eb5902',
        'cglib:cglib:3.2.8:cglib-3.2.8.jar:3f64de999ecc5595dc84ca8ff0879d8a34c8623f9ef3c517a53ed59023fcb9db',
-        'com.almworks.sqlite4java:sqlite4java:1.0.392:sqlite4java-1.0.392.jar:243a64470fda0e86a6fddeb0af4c7aa9426ce84e68cbfe18d75ee5da4b7e0b92',
-        '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',
+        'classworlds:classworlds:1.1-alpha-2:classworlds-1.1-alpha-2.jar:2bf4e59f3acd106fea6145a9a88fe8956509f8b9c0fdd11eb96fee757269e3f3',
+        'com.almworks.sqlite4java:sqlite4java:0.282:sqlite4java-0.282.jar:9e1d8dd83ca6003f841e3af878ce2dc7c22497493a7bb6d1b62ec1b0d0a83c05',
+        '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',
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-        'org.jacoco:org.jacoco.core:0.8.3:org.jacoco.core-0.8.3.jar:0818437bc060a0c7cc798148f22b713702aae2771aba104444407697d578f1ea',
-        'org.jacoco:org.jacoco.report:0.8.3:org.jacoco.report-0.8.3.jar:aae08fa4ff043c807b8876cdb2d8705eb8449a55efce461baa6c09da245088c1',
-        'org.jetbrains.intellij.deps:trove4j:1.0.20181211:trove4j-1.0.20181211.jar:affb7c85a3c87bdcf69ff1dbb84de11f63dc931293934bc08cd7ab18de083601',
-        'org.jetbrains.kotlin:kotlin-reflect:1.4.32:kotlin-reflect-1.4.32.jar:dbf19e9cdaa9c3c170f3f6f6ce3922f38dfc1d7fa1cab5b7c23a19da8b5eec5b',
+        'org.jetbrains.kotlin:kotlin-reflect:1.3.72:kotlin-reflect-1.3.72.jar:a188d9367de1c4ee9479db630985c0597b20709c83161b1430d24edb27e38c40',
+        'org.jetbrains.kotlin:kotlin-stdlib-common:1.3.72:kotlin-stdlib-common-1.3.72.jar:5e7d1552863e480c1628b1cc39ce230ef829f5b7230106215a05acda5172203a',
        'org.jetbrains.kotlin:kotlin-stdlib-common:1.4.20:kotlin-stdlib-common-1.4.20.jar:a7112c9b3cefee418286c9c9372f7af992bd1e6e030691d52f60cb36dbec8320',
-        'org.jetbrains.kotlin:kotlin-stdlib-common:1.4.32:kotlin-stdlib-common-1.4.32.jar:e1ff6f55ee9e7591dcc633f7757bac25a7edb1cc7f738b37ec652f10f66a4145',
-        'org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.4.32:kotlin-stdlib-jdk7-1.4.32.jar:5f801e75ca27d8791c14b07943c608da27620d910a8093022af57f543d5d98b6',
-        'org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.4.32:kotlin-stdlib-jdk8-1.4.32.jar:adc43e54757b106e0cd7b3b7aa257dff471b61efdabe067fc02b2f57e2396262',
+        'org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.3.72:kotlin-stdlib-jdk7-1.3.72.jar:40566c0c08d414b9413ba556ff7f8a0b04b98b9f0f424d122dd2088510efccc4',
+        'org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.3.72:kotlin-stdlib-jdk8-1.3.72.jar:133da70cfc07b56094282eac5c59bccd59f167ee2ead22e5282876d8bc10bf95',
+        'org.jetbrains.kotlin:kotlin-stdlib:1.3.72:kotlin-stdlib-1.3.72.jar:3856a7349ebacd6d1be6802b2fed9c4dc2c5a564ea92b6b945ac988243d4b16b',
        'org.jetbrains.kotlin:kotlin-stdlib:1.4.20:kotlin-stdlib-1.4.20.jar:b8ab1da5cdc89cb084d41e1f28f20a42bd431538642a5741c52bbfae3fa3e656',
-        'org.jetbrains.kotlin:kotlin-stdlib:1.4.32:kotlin-stdlib-1.4.32.jar:13e9fd3e69dc7230ce0fc873a92a4e5d521d179bcf1bef75a6705baac3bfecba',
        'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.4.1:kotlinx-coroutines-android-1.4.1.jar:d4cadb673b2101f1ee5fbc147956ac78b1cfd9cc255fb53d3aeb88dff11d99ca',
        'org.jetbrains.kotlinx:kotlinx-coroutines-core-jvm:1.4.1:kotlinx-coroutines-core-jvm-1.4.1.jar:6d2f87764b6638f27aff12ed380db4b63c9d46ba55dc32683a650598fa5a3e22',
        'org.jetbrains.kotlinx:kotlinx-metadata-jvm:0.1.0:kotlinx-metadata-jvm-0.1.0.jar:9753bb39efef35957c5c15df9a3cb769aabf2cdfa74b47afcb7760e5146be3b5',
+        'org.jetbrains.trove4j:trove4j:20160824:trove4j-20160824.jar:1917871c8deb468307a584680c87a44572f5a8b0b98c6d397fc0f5f86596dbe7',
        'org.jetbrains:annotations:13.0:annotations-13.0.jar:ace2a10dc8e2d5fd34925ecac03e4988b2c0f851650c94b8cef49ba1bd111478',
        'org.jmock:jmock-imposters:2.12.0:jmock-imposters-2.12.0.jar:3b836269745a137c9b2347e8d7c2104845b126ef04f012d6bfd94f1a7dea7b09',
        'org.jmock:jmock-junit4:2.12.0:jmock-junit4-2.12.0.jar:3233062fc889637c151a24f1ee086bad04321ab7d8264fef279daff0fa27205b',
        'org.jmock:jmock-legacy:2.12.0:jmock-legacy-2.12.0.jar:dea3a9cca653d082e2fe7e40232e982fe03a9984c7d67ceff24f3e03fe580dcd',
        'org.jmock:jmock-testjar:2.12.0:jmock-testjar-2.12.0.jar:efefbcf6cd294d0e29f0c46eb2a3380d4ca4e1763ff719c69e2f2ac62f564a04',
        'org.jmock:jmock:2.12.0:jmock-2.12.0.jar:266d07314c0cd343c46ff8a55601272de8cf406807caf55e6f313295f83d10be',
-        'org.junit.jupiter:junit-jupiter-api:5.7.0:junit-jupiter-api-5.7.0.jar:b03f78e0daeed2d77a0af9bcd662b4cdb9693f7ee72e01a539b508b84c63d182',
-        'org.junit.jupiter:junit-jupiter-engine:5.7.0:junit-jupiter-engine-5.7.0.jar:dfa26af94644ac2612dde6625852fcb550a0d21caa243257de54cba738ba87af',
-        'org.junit.platform:junit-platform-commons:1.7.0:junit-platform-commons-1.7.0.jar:5330ee87cc7586e6e25175a34e9251624ff12ff525269d3415d0b4ca519b6fea',
-        '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.mockito:mockito-core:3.9.0:mockito-core-3.9.0.jar:a1f64211407b8dc4cf80b16e07cc11aa9e5228d53dc4a5357326d66825f6a4ac',
        'org.nanohttpd:nanohttpd:2.3.1:nanohttpd-2.3.1.jar:de864c47818157141a24c9acb36df0c47d7bf15b7ff48c90610f3eb4e5df0e58',
        'org.objenesis:objenesis:3.2:objenesis-3.2.jar:03d960bd5aef03c653eb000413ada15eb77cdd2b8e4448886edf5692805e35f3',
-        '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-analysis:9.2:asm-analysis-9.2.jar:878fbe521731c072d14d2d65b983b1beae6ad06fda0007b6a8bae81f73f433c4',
        'org.ow2.asm:asm-commons:7.0:asm-commons-7.0.jar:fed348ef05958e3e846a3ac074a12af5f7936ef3d21ce44a62c4fa08a771927d',
-        'org.ow2.asm:asm-commons:9.2:asm-commons-9.2.jar:be4ce53138a238bb522cd781cf91f3ba5ce2f6ca93ec62d46a162a127225e0a6',
        'org.ow2.asm:asm-tree:7.0:asm-tree-7.0.jar:cfd7a0874f9de36a999c127feeadfbfe6e04d4a71ee954d7af3d853f0be48a6c',
-        'org.ow2.asm:asm-tree:9.2:asm-tree-9.2.jar:aabf9bd23091a4ebfc109c1f3ee7cf3e4b89f6ba2d3f51c5243f16b3cffae011',
        'org.ow2.asm:asm-util:7.0:asm-util-7.0.jar:75fbbca440ef463f41c2b0ab1a80abe67e910ac486da60a7863cbcb5bae7e145',
-        'org.ow2.asm:asm-util:9.2:asm-util-9.2.jar:ff5b3cd331ae8a9a804768280da98f50f424fef23dd3c788bb320e08c94ee598',
        'org.ow2.asm:asm:7.0:asm-7.0.jar:b88ef66468b3c978ad0c97fd6e90979e56155b4ac69089ba7a44e9aa7ffe9acf',
-        'org.ow2.asm:asm:9.2:asm-9.2.jar:b9d4fe4d71938df38839f0eca42aaaa64cf8b313d678da036f0cb3ca199b47f5',
-        'org.robolectric:annotations:4.7.2:annotations-4.7.2.jar:231821517a9a4fc8c577abd570fa48f3214da10e359083ecc4345bbb4e4a73c6',
-        'org.robolectric:junit:4.7.2:junit-4.7.2.jar:27ffba8662c7d8e011ab243202af9dbab9e89f5dc2762514ab6539a1be27346f',
-        'org.robolectric:nativeruntime:4.7.2:nativeruntime-4.7.2.jar:804bf799e17cf6358f8e11919add8cd0fa958abef5cb76003aa6f9a763802adf',
-        'org.robolectric:pluginapi:4.7.2:pluginapi-4.7.2.jar:6414ef8ff549a3a195993df4798f70e8b31d81e0ffc6a0d47dc007aedfc2ee78',
-        'org.robolectric:plugins-maven-dependency-resolver:4.7.2:plugins-maven-dependency-resolver-4.7.2.jar:660bb58d7dbba32efbbe19164ca1d0a81f19a6bec78bc7f21dd4248483bc997c',
-        'org.robolectric:resources:4.7.2:resources-4.7.2.jar:6bd48f83fc9c5b50d49d49512ac6bd2f923d078d3140ed4ecdb50913d27d5b0c',
-        'org.robolectric:robolectric:4.7.2:robolectric-4.7.2.jar:5bbdeb7647ea2377d40a5cfddb3fd53021741d15bbfcde825e9326f5f501b930',
-        'org.robolectric:sandbox:4.7.2:sandbox-4.7.2.jar:f008e97cd35bdbc98a4ccbbe3bf3ff938e6b960c359943685f7233b02f67e811',
-        'org.robolectric:shadowapi:4.7.2:shadowapi-4.7.2.jar:dba5a4b630997b2fa22ff3e67d6c168de4c2ad20570adce653eb9f7a014a2a8b',
-        'org.robolectric:shadows-framework:4.7.2:shadows-framework-4.7.2.jar:423b726fad8e09c302ab92048e1f378440a9279f49dc6fa6dc4d4d5c66200e64',
-        'org.robolectric:utils-reflector:4.7.2:utils-reflector-4.7.2.jar:28cc93927b48de95d3b392e7439817037099cf6327aa633c39735d0ed2da55a6',
-        'org.robolectric:utils:4.7.2:utils-4.7.2.jar:45715d23d41ee0b6e667218d0f55b4f79bb160d83eaf836c8daa41bbcfe7f83b',
-        'org.testng:testng:7.3.0:testng-7.3.0.jar:63727488f9717d57f0d0a0fee5a1fc10a2be9cfcff2ec3a7187656d663c0774e',
+        'org.ow2.asm:asm:7.1:asm-7.1.jar:4ab2fa2b6d2cc9ccb1eaa05ea329c407b47b13ed2915f62f8c4b8cc96258d4de',
+        'org.robolectric:annotations:4.3.1:annotations-4.3.1.jar:ce679af70c22620b5752aa6c1555d0653198d6370e9a93fe71b8eaaebc5ffaf6',
+        'org.robolectric:junit:4.3.1:junit-4.3.1.jar:60c85ea7fd652bc4e57567cbd3c41c5d32f2c678e212b713cefa6c63570451ce',
+        'org.robolectric:pluginapi:4.3.1:pluginapi-4.3.1.jar:229256a260a1d8e8d33613a3de7ccd639661a7061251c1974975ed427428b468',
+        'org.robolectric:plugins-maven-dependency-resolver:4.3.1:plugins-maven-dependency-resolver-4.3.1.jar:0d6c577fdefe254659ffba5c0564d7e00c69f03e99a4ebb6c150419834cdb703',
+        'org.robolectric:resources:4.3.1:resources-4.3.1.jar:93033237006b51541f8e93d65940f9040367775937d0ce9ac3f4ef72771c51b8',
+        'org.robolectric:robolectric:4.3.1:robolectric-4.3.1.jar:3ef4267112ba581ee2a7ad37859bf61571404f07df85b8ad1da054f90eb57a5a',
+        'org.robolectric:sandbox:4.3.1:sandbox-4.3.1.jar:405f73400d717e083b25af92fa7866a76765dd4e97cf7fd046023d4f05375a9f',
+        'org.robolectric:shadowapi:4.3.1:shadowapi-4.3.1.jar:a63d13e7f3816f28ac33eea71a15c7f3f0053ecd01b08cc1e1e119af35ca1197',
+        'org.robolectric:shadows-framework:4.3.1:shadows-framework-4.3.1.jar:9c69db134cdd79be751856a148020fd9b32b086bb491846eedc0a1106fcadd5e',
+        'org.robolectric:utils-reflector:4.3.1:utils-reflector-4.3.1.jar:9d7bf2557947d44d6f3ed76ec5231e8b72e33eb61c65ac9e149ad307b0eb936c',
+        'org.robolectric:utils:4.3.1:utils-4.3.1.jar:6f9e406cd667019a5450e473c4e2d372bff9c9ab6ef55aafcbc9843109cb1519',
        'tools.fastlane:screengrab:2.0.0:screengrab-2.0.0.aar:15ac15eb7c371db05e721be8d466567c2b7274b767d91478e781b6d89ee5d3d0',
        'uk.co.samuelwall:material-tap-target-prompt:3.3.0:material-tap-target-prompt-3.3.0.aar:00f16e8d7e55d01e3b41cf66e09eee8588870ca7285ba3c72267ca0482f1606e',
-        '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/briar-api/build.gradle
+++ b/briar-api/build.gradle
@@ -3,6 +3,7 @@ sourceCompatibility = 1.8
 targetCompatibility = 1.8

 apply plugin: 'ru.vyarus.animalsniffer'
+apply plugin: 'checkstyle'
 apply plugin: 'witness'
 apply from: 'witness.gradle'

--- a/briar-api/src/main/java/org/briarproject/briar/api/blog/BlogPostHeader.java
+++ b/briar-api/src/main/java/org/briarproject/briar/api/blog/BlogPostHeader.java
@@ -1,11 +1,11 @@
 package org.briarproject.briar.api.blog;

 import org.briarproject.bramble.api.identity.Author;
-import org.briarproject.briar.api.identity.AuthorInfo;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.sync.GroupId;
 import org.briarproject.bramble.api.sync.MessageId;
 import org.briarproject.briar.api.client.PostHeader;
+import org.briarproject.briar.api.identity.AuthorInfo;

 import javax.annotation.Nullable;
 import javax.annotation.concurrent.Immutable;
@@ -21,7 +21,8 @@ public class BlogPostHeader extends PostHeader {

 	public BlogPostHeader(MessageType type, GroupId groupId, MessageId id,
 			@Nullable MessageId parentId, long timestamp, long timeReceived,
-			Author author, AuthorInfo authorInfo, boolean rssFeed, boolean read) {
+			Author author, AuthorInfo authorInfo, boolean rssFeed,
+			boolean read) {
 		super(id, parentId, timestamp, author, authorInfo, read);
 		this.type = type;
 		this.groupId = groupId;
--- a/briar-api/src/main/java/org/briarproject/briar/api/client/MessageTracker.java
+++ b/briar-api/src/main/java/org/briarproject/briar/api/client/MessageTracker.java
@@ -6,7 +6,6 @@ import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.sync.GroupId;
 import org.briarproject.bramble.api.sync.Message;
 import org.briarproject.bramble.api.sync.MessageId;
-import org.briarproject.briar.api.conversation.ConversationManager;

 import javax.annotation.Nullable;

@@ -33,28 +32,16 @@ public interface MessageTracker {

 	/**
 	 * Updates the group count for the given incoming message.
-	 * <p>
-	 * For messages that are part of a conversation (private chat),
-	 * use the corresponding function inside
-	 * {@link ConversationManager} instead.
 	 */
 	void trackIncomingMessage(Transaction txn, Message m) throws DbException;

 	/**
 	 * Updates the group count for the given outgoing message.
-	 * <p>
-	 * For messages that are part of a conversation (private chat),
-	 * use the corresponding function inside
-	 * {@link ConversationManager} instead.
 	 */
 	void trackOutgoingMessage(Transaction txn, Message m) throws DbException;

 	/**
 	 * Updates the group count for the given message.
-	 * <p>
-	 * For messages that are part of a conversation (private chat),
-	 * use the corresponding function inside
-	 * {@link ConversationManager} instead.
 	 */
 	void trackMessage(Transaction txn, GroupId g, long timestamp, boolean read)
 			throws DbException;
--- a/briar-api/src/main/java/org/briarproject/briar/api/client/PostHeader.java
+++ b/briar-api/src/main/java/org/briarproject/briar/api/client/PostHeader.java
@@ -1,10 +1,10 @@
 package org.briarproject.briar.api.client;

 import org.briarproject.bramble.api.identity.Author;
-import org.briarproject.briar.api.identity.AuthorInfo;
-import org.briarproject.briar.api.identity.AuthorInfo.Status;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.sync.MessageId;
+import org.briarproject.briar.api.identity.AuthorInfo;
+import org.briarproject.briar.api.identity.AuthorInfo.Status;

 import javax.annotation.Nullable;
 import javax.annotation.concurrent.Immutable;
@@ -22,7 +22,8 @@ public abstract class PostHeader {
 	private final boolean read;

 	public PostHeader(MessageId id, @Nullable MessageId parentId,
-			long timestamp, Author author, AuthorInfo authorInfo, boolean read) {
+			long timestamp, Author author, AuthorInfo authorInfo,
+			boolean read) {
 		this.id = id;
 		this.parentId = parentId;
 		this.timestamp = timestamp;
--- a/briar-api/src/main/java/org/briarproject/briar/api/conversation/ConversationManager.java
+++ b/briar-api/src/main/java/org/briarproject/briar/api/conversation/ConversationManager.java
@@ -7,7 +7,6 @@ import org.briarproject.bramble.api.db.Transaction;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.sync.Group;
 import org.briarproject.bramble.api.sync.GroupId;
-import org.briarproject.bramble.api.sync.Message;
 import org.briarproject.bramble.api.sync.MessageId;
 import org.briarproject.briar.api.client.MessageTracker.GroupCount;
 import org.briarproject.briar.api.messaging.MessagingManager;
@@ -48,27 +47,6 @@ public interface ConversationManager {
 	 */
 	GroupCount getGroupCount(Transaction txn, ContactId c) throws DbException;

-	/**
-	 * Updates the group count for the given incoming private conversation message
-	 * and broadcasts a corresponding event.
-	 */
-	void trackIncomingMessage(Transaction txn, Message m)
-			throws DbException;
-
-	/**
-	 * Updates the group count for the given outgoing private conversation message
-	 * and broadcasts a corresponding event.
-	 */
-	void trackOutgoingMessage(Transaction txn, Message m)
-			throws DbException;
-
-	/**
-	 * Updates the group count for the given private conversation message
-	 * and broadcasts a corresponding event.
-	 */
-	void trackMessage(Transaction txn, GroupId g, long timestamp, boolean read)
-			throws DbException;
-
 	void setReadFlag(GroupId g, MessageId m, boolean read)
 			throws DbException;

--- a/briar-api/src/main/java/org/briarproject/briar/api/conversation/event/ConversationMessageTrackedEvent.java
+++ b/briar-api/src/main/java/org/briarproject/briar/api/conversation/event/ConversationMessageTrackedEvent.java
@@ -1,41 +0,0 @@
-package org.briarproject.briar.api.conversation.event;
-
-import org.briarproject.bramble.api.contact.ContactId;
-import org.briarproject.bramble.api.event.Event;
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.api.sync.Message;
-import org.briarproject.briar.api.conversation.ConversationMessageHeader;
-
-import javax.annotation.concurrent.Immutable;
-
-/**
- * An event that is broadcast when a new conversation message is tracked.
- * Allows the UI to update the conversation's group count.
- */
-@Immutable
-@NotNullByDefault
-public class ConversationMessageTrackedEvent extends Event {
-
-	private final long timestamp;
-	private final boolean read;
-	private final ContactId contactId;
-
-	public ConversationMessageTrackedEvent(long timestamp,
-			boolean read, ContactId contactId) {
-		this.timestamp = timestamp;
-		this.read = read;
-		this.contactId = contactId;
-	}
-
-	public long getTimestamp() {
-		return timestamp;
-	}
-
-	public boolean getRead() {
-		return read;
-	}
-
-	public ContactId getContactId() {
-		return contactId;
-	}
-}
--- a/briar-api/src/main/java/org/briarproject/briar/api/forum/event/ForumInvitationRequestReceivedEvent.java
+++ b/briar-api/src/main/java/org/briarproject/briar/api/forum/event/ForumInvitationRequestReceivedEvent.java
@@ -13,8 +13,8 @@ import javax.annotation.concurrent.Immutable;
 public class ForumInvitationRequestReceivedEvent extends
 		ConversationMessageReceivedEvent<ConversationRequest<Forum>> {

-	public ForumInvitationRequestReceivedEvent(ConversationRequest<Forum> request,
-			ContactId contactId) {
+	public ForumInvitationRequestReceivedEvent(
+			ConversationRequest<Forum> request, ContactId contactId) {
 		super(request, contactId);
 	}

--- a/briar-api/src/main/java/org/briarproject/briar/api/messaging/PrivateMessage.java
+++ b/briar-api/src/main/java/org/briarproject/briar/api/messaging/PrivateMessage.java
@@ -51,8 +51,8 @@ public class PrivateMessage {

 	/**
 	 * Constructor for private messages in the
-	 * {@link PrivateMessageFormat#TEXT_IMAGES_AUTO_DELETE TEXT_IMAGES_AUTO_DELETE}
-	 * format.
+	 * {@link PrivateMessageFormat#TEXT_IMAGES_AUTO_DELETE
+	 * TEXT_IMAGES_AUTO_DELETE} format.
 	 */
 	public PrivateMessage(Message message, boolean hasText,
 			List<AttachmentHeader> headers, long autoDeleteTimer) {
--- a/briar-api/src/main/java/org/briarproject/briar/api/messaging/PrivateMessageFactory.java
+++ b/briar-api/src/main/java/org/briarproject/briar/api/messaging/PrivateMessageFactory.java
@@ -30,9 +30,9 @@ public interface PrivateMessageFactory {

 	/**
 	 * Creates a private message in the
-	 * {@link PrivateMessageFormat#TEXT_IMAGES_AUTO_DELETE TEXT_IMAGES_AUTO_DELETE}
-	 * format. This format requires the contact to support client version 0.3
-	 * or higher.
+	 * {@link PrivateMessageFormat#TEXT_IMAGES_AUTO_DELETE
+	 * TEXT_IMAGES_AUTO_DELETE} format. This format requires the contact to
+	 * support client version 0.3 or higher.
 	 */
 	PrivateMessage createPrivateMessage(GroupId groupId, long timestamp,
 			@Nullable String text, List<AttachmentHeader> headers,
--- a/briar-api/witness.gradle
+++ b/briar-api/witness.gradle
@@ -1,7 +1,22 @@
 dependencyVerification {
    verify = [
+        'antlr:antlr:2.7.7:antlr-2.7.7.jar:88fbda4b912596b9f56e8e12e580cc954bacfb51776ecfddd3e18fc1cf56dc4c',
+        'com.google.code.findbugs:jsr305:3.0.2:jsr305-3.0.2.jar:766ad2a0783f2687962c8ad74ceecc38a28b9f72a2d085ee438b7813e928d0c7',
+        'com.google.errorprone:error_prone_annotations:2.3.2:error_prone_annotations-2.3.2.jar:357cd6cfb067c969226c442451502aee13800a24e950fdfde77bcdb4565a668d',
+        'com.google.guava:failureaccess:1.0.1:failureaccess-1.0.1.jar:a171ee4c734dd2da837e4b16be9df4661afab72a41adaf31eb84dfdaf936ca26',
+        '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:1.3:j2objc-annotations-1.3.jar:21af30c92267bd6122c0e0b4d20cccb6641a37eaf956c6540ec471d584e64a7b',
+        'com.puppycrawl.tools:checkstyle:8.27:checkstyle-8.27.jar:26c81958a112ebdfc5d7b40507bbfc8f15f606fea1e55ef5675609ddb41a6053',
+        'commons-beanutils:commons-beanutils:1.9.4:commons-beanutils-1.9.4.jar:7d938c81789028045c08c065e94be75fc280527620d5bd62b519d5838532368a',
+        'commons-collections:commons-collections:3.2.2:commons-collections-3.2.2.jar:eeeae917917144a68a741d4c0dff66aa5c5c5fd85593ff217bced3fc8ca783b8',
+        'info.picocli:picocli:4.1.1:picocli-4.1.1.jar:9238b6af4ded57dcfedf6f7dbcf2bdf334dae2f118ea2a0bd6d05066e63ee6fc',
        'junit:junit:4.13.2:junit-4.13.2.jar:8e495b634469d64fb8acfa3495a065cbacc8a0fff55ce1e31007be4c16dc57d3',
+        'net.sf.saxon:Saxon-HE:9.9.1-5:Saxon-HE-9.9.1-5.jar:4b39a9e30d5b634b5e91db5f0c6937f176d4517543ababc9b5e01830b8c56620',
+        'org.antlr:antlr4-runtime:4.7.2:antlr4-runtime-4.7.2.jar:4c518b87d4bdff8b44cd8cbc1af816e944b62a3fe5b80b781501cf1f4759bbc4',
+        'org.checkerframework:checker-qual:2.8.1:checker-qual-2.8.1.jar:9103499008bcecd4e948da29b17864abb64304e15706444ae209d17ebe0575df',
        'org.codehaus.mojo.signature:java16:1.1:java16-1.1.signature:53799223a2c98dba2d0add810bed76315460df285c69e4f397ae6098f87dd619',
+        'org.codehaus.mojo:animal-sniffer-annotations:1.18:animal-sniffer-annotations-1.18.jar:47f05852b48ee9baefef80fa3d8cea60efa4753c0013121dd7fe5eef2e5c729d',
        'org.codehaus.mojo:animal-sniffer-ant-tasks:1.20:animal-sniffer-ant-tasks-1.20.jar:bb7d2498144118311d968bb08ff6fae3fc535fb1cb9cca8b8e9ea65b189422ac',
        'org.codehaus.mojo:animal-sniffer:1.20:animal-sniffer-1.20.jar:80c422523c38db91260c6d78e5ee4b012862ab61cc55020c9e243dd7b5c62249',
        'org.hamcrest:hamcrest-core:1.3:hamcrest-core-1.3.jar:66fdef91e9739348df7a096aa384a5685f4e875584cce89386a7a47251c4d8e9',
--- a/briar-core/build.gradle
+++ b/briar-core/build.gradle
@@ -3,6 +3,7 @@ sourceCompatibility = 1.8
 targetCompatibility = 1.8

 apply plugin: 'ru.vyarus.animalsniffer'
+apply plugin: 'checkstyle'
 apply plugin: 'idea'
 apply plugin: 'witness'
 apply from: 'witness.gradle'
--- a/briar-core/src/main/java/org/briarproject/briar/conversation/ConversationManagerImpl.java
+++ b/briar-core/src/main/java/org/briarproject/briar/conversation/ConversationManagerImpl.java
@@ -1,14 +1,11 @@
 package org.briarproject.briar.conversation;

-import org.briarproject.bramble.api.client.ClientHelper;
 import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.db.DatabaseComponent;
 import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.db.Transaction;
-import org.briarproject.bramble.api.event.Event;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.sync.GroupId;
-import org.briarproject.bramble.api.sync.Message;
 import org.briarproject.bramble.api.sync.MessageId;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.briar.api.client.MessageTracker;
@@ -16,7 +13,6 @@ import org.briarproject.briar.api.client.MessageTracker.GroupCount;
 import org.briarproject.briar.api.conversation.ConversationManager;
 import org.briarproject.briar.api.conversation.ConversationMessageHeader;
 import org.briarproject.briar.api.conversation.DeletionResult;
-import org.briarproject.briar.api.conversation.event.ConversationMessageTrackedEvent;

 import java.util.ArrayList;
 import java.util.Collection;
@@ -36,16 +32,14 @@ class ConversationManagerImpl implements ConversationManager {
 	private final DatabaseComponent db;
 	private final MessageTracker messageTracker;
 	private final Clock clock;
-	private final ClientHelper clientHelper;
 	private final Set<ConversationClient> clients;

 	@Inject
 	ConversationManagerImpl(DatabaseComponent db, MessageTracker messageTracker,
-			Clock clock, ClientHelper clientHelper) {
+			Clock clock) {
 		this.db = db;
 		this.messageTracker = messageTracker;
 		this.clock = clock;
-		this.clientHelper = clientHelper;
 		clients = new CopyOnWriteArraySet<>();
 	}

@@ -92,36 +86,6 @@ class ConversationManagerImpl implements ConversationManager {
 		return new GroupCount(msgCount, unreadCount, latestTime);
 	}

-	@Override
-	public void trackIncomingMessage(Transaction txn, Message m)
-			throws DbException {
-		messageTracker.trackIncomingMessage(txn, m);
-		Event e = new ConversationMessageTrackedEvent(
-				m.getTimestamp(), false,
-				clientHelper.getContactId(txn, m.getGroupId()));
-		txn.attach(e);
-	}
-
-	@Override
-	public void trackOutgoingMessage(Transaction txn, Message m)
-			throws DbException {
-		messageTracker.trackOutgoingMessage(txn, m);
-		Event e = new ConversationMessageTrackedEvent(
-				m.getTimestamp(), true,
-				clientHelper.getContactId(txn, m.getGroupId()));
-		txn.attach(e);
-	}
-
-	@Override
-	public void trackMessage(Transaction txn, GroupId g, long timestamp,
-			boolean read)
-			throws DbException {
-		messageTracker.trackMessage(txn, g, timestamp, read);
-		Event e = new ConversationMessageTrackedEvent(
-				timestamp, read, clientHelper.getContactId(txn, g));
-		txn.attach(e);
-	}
-
 	@Override
 	public void setReadFlag(GroupId g, MessageId m, boolean read)
 			throws DbException {
--- a/briar-core/src/main/java/org/briarproject/briar/introduction/AbstractProtocolEngine.java
+++ b/briar-core/src/main/java/org/briarproject/briar/introduction/AbstractProtocolEngine.java
@@ -100,7 +100,7 @@ abstract class AbstractProtocolEngine<S extends Session<?>>
 			long timestamp, Author author, @Nullable String text)
 			throws DbException {
 		Message m;
-		ContactId c = clientHelper.getContactId(txn, s.getContactGroupId());
+		ContactId c = getContactId(txn, s.getContactGroupId());
 		if (contactSupportsAutoDeletion(txn, c)) {
 			long timer = autoDeleteManager.getAutoDeleteTimer(txn, c,
 					timestamp);
@@ -125,7 +125,7 @@ abstract class AbstractProtocolEngine<S extends Session<?>>
 			Map<TransportId, TransportProperties> transportProperties,
 			boolean visible) throws DbException {
 		Message m;
-		ContactId c = clientHelper.getContactId(txn, s.getContactGroupId());
+		ContactId c = getContactId(txn, s.getContactGroupId());
 		if (contactSupportsAutoDeletion(txn, c)) {
 			long timer = autoDeleteManager.getAutoDeleteTimer(txn, c,
 					timestamp);
@@ -152,7 +152,7 @@ abstract class AbstractProtocolEngine<S extends Session<?>>
 			boolean visible, boolean isAutoDecline) throws DbException {
 		if (!visible && isAutoDecline) throw new IllegalArgumentException();
 		Message m;
-		ContactId c = clientHelper.getContactId(txn, s.getContactGroupId());
+		ContactId c = getContactId(txn, s.getContactGroupId());
 		if (contactSupportsAutoDeletion(txn, c)) {
 			long timer = autoDeleteManager.getAutoDeleteTimer(txn, c,
 					timestamp);
@@ -276,17 +276,26 @@ abstract class AbstractProtocolEngine<S extends Session<?>>

 	long getTimestampForOutgoingMessage(Transaction txn, GroupId contactGroupId)
 			throws DbException {
-		ContactId c = clientHelper.getContactId(txn, contactGroupId);
+		ContactId c = getContactId(txn, contactGroupId);
 		return conversationManager.getTimestampForOutgoingMessage(txn, c);
 	}

 	void receiveAutoDeleteTimer(Transaction txn, AbstractIntroductionMessage m)
 			throws DbException {
-		ContactId c = clientHelper.getContactId(txn, m.getGroupId());
+		ContactId c = getContactId(txn, m.getGroupId());
 		autoDeleteManager.receiveAutoDeleteTimer(txn, c, m.getAutoDeleteTimer(),
 				m.getTimestamp());
 	}

+	private ContactId getContactId(Transaction txn, GroupId contactGroupId)
+			throws DbException {
+		try {
+			return clientHelper.getContactId(txn, contactGroupId);
+		} catch (FormatException e) {
+			throw new DbException(e);
+		}
+	}
+
 	private boolean contactSupportsAutoDeletion(Transaction txn, ContactId c)
 			throws DbException {
 		int minorVersion = clientVersioningManager.getClientMinorVersion(txn, c,
--- a/briar-core/src/main/java/org/briarproject/briar/introduction/IntroduceeProtocolEngine.java
+++ b/briar-core/src/main/java/org/briarproject/briar/introduction/IntroduceeProtocolEngine.java
@@ -266,7 +266,7 @@ class IntroduceeProtocolEngine
 		addSessionId(txn, m.getMessageId(), s.getSessionId());

 		// Track the incoming message
-		conversationManager
+		messageTracker
 				.trackMessage(txn, m.getGroupId(), m.getTimestamp(), false);

 		// Receive the auto-delete timer
@@ -307,7 +307,7 @@ class IntroduceeProtocolEngine
 		Message sent = sendAcceptMessage(txn, s, localTimestamp, publicKey,
 				localTimestamp, transportProperties, true);
 		// Track the message
-		conversationManager.trackOutgoingMessage(txn, sent);
+		messageTracker.trackOutgoingMessage(txn, sent);

 		// Determine the next state
 		switch (s.getState()) {
@@ -338,7 +338,7 @@ class IntroduceeProtocolEngine
 				sendDeclineMessage(txn, s, localTimestamp, true, isAutoDecline);

 		// Track the message
-		conversationManager.trackOutgoingMessage(txn, sent);
+		messageTracker.trackOutgoingMessage(txn, sent);

 		// Move to the START or LOCAL_DECLINED state, if still awaiting response
 		IntroduceeState state =
@@ -382,7 +382,7 @@ class IntroduceeProtocolEngine
 		markMessageVisibleInUi(txn, m.getMessageId());

 		// Track the incoming message
-		conversationManager
+		messageTracker
 				.trackMessage(txn, m.getGroupId(), m.getTimestamp(), false);

 		// Receive the auto-delete timer
--- a/briar-core/src/main/java/org/briarproject/briar/introduction/IntroducerProtocolEngine.java
+++ b/briar-core/src/main/java/org/briarproject/briar/introduction/IntroducerProtocolEngine.java
@@ -40,7 +40,6 @@ import static org.briarproject.briar.introduction.IntroducerState.A_DECLINED;
 import static org.briarproject.briar.introduction.IntroducerState.B_DECLINED;
 import static org.briarproject.briar.introduction.IntroducerState.START;

-
@Immutable
@NotNullByDefault
 class IntroducerProtocolEngine
@@ -232,8 +231,8 @@ class IntroducerProtocolEngine
 		Message sentB = sendRequestMessage(txn, s.getIntroduceeB(),
 				localTimestamp, s.getIntroduceeA().author, text);
 		// Track the messages
-		conversationManager.trackOutgoingMessage(txn, sentA);
-		conversationManager.trackOutgoingMessage(txn, sentB);
+		messageTracker.trackOutgoingMessage(txn, sentA);
+		messageTracker.trackOutgoingMessage(txn, sentB);
 		// Move to the AWAIT_RESPONSES state
 		Introducee introduceeA = new Introducee(s.getIntroduceeA(), sentA);
 		Introducee introduceeB = new Introducee(s.getIntroduceeB(), sentB);
@@ -261,7 +260,7 @@ class IntroducerProtocolEngine
 		// Mark the response visible in the UI
 		markMessageVisibleInUi(txn, m.getMessageId());
 		// Track the incoming message
-		conversationManager
+		messageTracker
 				.trackMessage(txn, m.getGroupId(), m.getTimestamp(), false);
 		// Receive the auto-delete timer
 		receiveAutoDeleteTimer(txn, m);
@@ -324,7 +323,7 @@ class IntroducerProtocolEngine
 		// Mark the response visible in the UI
 		markMessageVisibleInUi(txn, m.getMessageId());
 		// Track the incoming message
-		conversationManager
+		messageTracker
 				.trackMessage(txn, m.getGroupId(), m.getTimestamp(), false);
 		// Receive the auto-delete timer
 		receiveAutoDeleteTimer(txn, m);
@@ -379,7 +378,7 @@ class IntroducerProtocolEngine
 		// Mark the response visible in the UI
 		markMessageVisibleInUi(txn, m.getMessageId());
 		// Track the incoming message
-		conversationManager
+		messageTracker
 				.trackMessage(txn, m.getGroupId(), m.getTimestamp(), false);
 		// Receive the auto-delete timer
 		receiveAutoDeleteTimer(txn, m);
@@ -434,7 +433,7 @@ class IntroducerProtocolEngine
 		// Mark the response visible in the UI
 		markMessageVisibleInUi(txn, m.getMessageId());
 		// Track the incoming message
-		conversationManager
+		messageTracker
 				.trackMessage(txn, m.getGroupId(), m.getTimestamp(), false);
 		// Receive the auto-delete timer
 		receiveAutoDeleteTimer(txn, m);
@@ -654,8 +653,8 @@ class IntroducerProtocolEngine

 	/**
 	 * Returns a timestamp for an invisible outgoing message. The timestamp is
-	 * later than the {@link #getSessionTimestamp(IntroducerSession, PeerSession)
-	 * session timestamp}.
+	 * later than the {@link #getSessionTimestamp(IntroducerSession,
+	 * PeerSession) session timestamp}.
 	 */
 	private long getTimestampForInvisibleMessage(IntroducerSession s,
 			PeerSession p) {
--- a/briar-core/src/main/java/org/briarproject/briar/messaging/MessagingManagerImpl.java
+++ b/briar-core/src/main/java/org/briarproject/briar/messaging/MessagingManagerImpl.java
@@ -34,7 +34,6 @@ import org.briarproject.briar.api.autodelete.AutoDeleteManager;
 import org.briarproject.briar.api.autodelete.event.ConversationMessagesDeletedEvent;
 import org.briarproject.briar.api.client.MessageTracker;
 import org.briarproject.briar.api.client.MessageTracker.GroupCount;
-import org.briarproject.briar.api.conversation.ConversationManager;
 import org.briarproject.briar.api.conversation.ConversationManager.ConversationClient;
 import org.briarproject.briar.api.conversation.ConversationMessageHeader;
 import org.briarproject.briar.api.conversation.DeletionResult;
@@ -97,7 +96,6 @@ class MessagingManagerImpl implements MessagingManager, IncomingMessageHook,
 	private final DatabaseComponent db;
 	private final ClientHelper clientHelper;
 	private final MetadataParser metadataParser;
-	private final ConversationManager conversationManager;
 	private final MessageTracker messageTracker;
 	private final ClientVersioningManager clientVersioningManager;
 	private final ContactGroupFactory contactGroupFactory;
@@ -109,14 +107,12 @@ class MessagingManagerImpl implements MessagingManager, IncomingMessageHook,
 			ClientHelper clientHelper,
 			ClientVersioningManager clientVersioningManager,
 			MetadataParser metadataParser,
-			ConversationManager conversationManager,
 			MessageTracker messageTracker,
 			ContactGroupFactory contactGroupFactory,
 			AutoDeleteManager autoDeleteManager) {
 		this.db = db;
 		this.clientHelper = clientHelper;
 		this.metadataParser = metadataParser;
-		this.conversationManager = conversationManager;
 		this.messageTracker = messageTracker;
 		this.clientVersioningManager = clientVersioningManager;
 		this.contactGroupFactory = contactGroupFactory;
@@ -218,7 +214,7 @@ class MessagingManagerImpl implements MessagingManager, IncomingMessageHook,
 		PrivateMessageReceivedEvent event =
 				new PrivateMessageReceivedEvent(header, contactId);
 		txn.attach(event);
-		conversationManager.trackIncomingMessage(txn, m);
+		messageTracker.trackIncomingMessage(txn, m);
 		if (timer != NO_AUTO_DELETE_TIMER) {
 			db.setCleanupTimerDuration(txn, m.getId(), timer);
 		}
@@ -328,7 +324,7 @@ class MessagingManagerImpl implements MessagingManager, IncomingMessageHook,
 			if (timer != NO_AUTO_DELETE_TIMER) {
 				db.setCleanupTimerDuration(txn, m.getMessage().getId(), timer);
 			}
-			conversationManager.trackOutgoingMessage(txn, m.getMessage());
+			messageTracker.trackOutgoingMessage(txn, m.getMessage());
 		} catch (FormatException e) {
 			throw new AssertionError(e);
 		}
--- a/briar-core/src/main/java/org/briarproject/briar/privategroup/invitation/AbstractProtocolEngine.java
+++ b/briar-core/src/main/java/org/briarproject/briar/privategroup/invitation/AbstractProtocolEngine.java
@@ -19,6 +19,7 @@ import org.briarproject.bramble.api.sync.MessageId;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.api.versioning.ClientVersioningManager;
 import org.briarproject.briar.api.autodelete.AutoDeleteManager;
+import org.briarproject.briar.api.client.MessageTracker;
 import org.briarproject.briar.api.client.SessionId;
 import org.briarproject.briar.api.conversation.ConversationManager;
 import org.briarproject.briar.api.privategroup.GroupMessage;
@@ -51,7 +52,7 @@ abstract class AbstractProtocolEngine<S extends Session<?>>
 	protected final ClientHelper clientHelper;
 	protected final PrivateGroupManager privateGroupManager;
 	protected final PrivateGroupFactory privateGroupFactory;
-	protected final ConversationManager conversationManager;
+	protected final MessageTracker messageTracker;

 	private final ClientVersioningManager clientVersioningManager;
 	private final GroupMessageFactory groupMessageFactory;
@@ -59,6 +60,7 @@ abstract class AbstractProtocolEngine<S extends Session<?>>
 	private final MessageParser messageParser;
 	private final MessageEncoder messageEncoder;
 	private final AutoDeleteManager autoDeleteManager;
+	private final ConversationManager conversationManager;
 	private final Clock clock;

 	AbstractProtocolEngine(
@@ -71,6 +73,7 @@ abstract class AbstractProtocolEngine<S extends Session<?>>
 			IdentityManager identityManager,
 			MessageParser messageParser,
 			MessageEncoder messageEncoder,
+			MessageTracker messageTracker,
 			AutoDeleteManager autoDeleteManager,
 			ConversationManager conversationManager,
 			Clock clock) {
@@ -83,6 +86,7 @@ abstract class AbstractProtocolEngine<S extends Session<?>>
 		this.identityManager = identityManager;
 		this.messageParser = messageParser;
 		this.messageEncoder = messageEncoder;
+		this.messageTracker = messageTracker;
 		this.autoDeleteManager = autoDeleteManager;
 		this.conversationManager = conversationManager;
 		this.clock = clock;
@@ -125,7 +129,7 @@ abstract class AbstractProtocolEngine<S extends Session<?>>
 			throw new DbException(e); // Invalid group descriptor
 		}
 		Message m;
-		ContactId c = clientHelper.getContactId(txn, s.getContactGroupId());
+		ContactId c = getContactId(txn, s.getContactGroupId());
 		if (contactSupportsAutoDeletion(txn, c)) {
 			m = messageEncoder.encodeInviteMessage(s.getContactGroupId(),
 					privateGroup.getId(), timestamp, privateGroup.getName(),
@@ -153,7 +157,7 @@ abstract class AbstractProtocolEngine<S extends Session<?>>
 		long localTimestamp = visibleInUi
 				? getTimestampForVisibleMessage(txn, s)
 				: getTimestampForInvisibleMessage(s);
-		ContactId c = clientHelper.getContactId(txn, s.getContactGroupId());
+		ContactId c = getContactId(txn, s.getContactGroupId());
 		if (contactSupportsAutoDeletion(txn, c)) {
 			// Set auto-delete timer if manually accepting an invitation
 			long timer = NO_AUTO_DELETE_TIMER;
@@ -191,7 +195,7 @@ abstract class AbstractProtocolEngine<S extends Session<?>>
 		long localTimestamp = visibleInUi
 				? getTimestampForVisibleMessage(txn, s)
 				: getTimestampForInvisibleMessage(s);
-		ContactId c = clientHelper.getContactId(txn, s.getContactGroupId());
+		ContactId c = getContactId(txn, s.getContactGroupId());
 		if (contactSupportsAutoDeletion(txn, c)) {
 			// Set auto-delete timer if declining an invitation
 			long timer = NO_AUTO_DELETE_TIMER;
@@ -305,7 +309,7 @@ abstract class AbstractProtocolEngine<S extends Session<?>>
 	 */
 	long getTimestampForVisibleMessage(Transaction txn, S s)
 			throws DbException {
-		ContactId c = clientHelper.getContactId(txn, s.getContactGroupId());
+		ContactId c = getContactId(txn, s.getContactGroupId());
 		long conversationTimestamp =
 				conversationManager.getTimestampForOutgoingMessage(txn, c);
 		return max(conversationTimestamp, getSessionTimestamp(s) + 1);
@@ -329,7 +333,7 @@ abstract class AbstractProtocolEngine<S extends Session<?>>

 	void receiveAutoDeleteTimer(Transaction txn,
 			DeletableGroupInvitationMessage m) throws DbException {
-		ContactId c = clientHelper.getContactId(txn, m.getContactGroupId());
+		ContactId c = getContactId(txn, m.getContactGroupId());
 		autoDeleteManager.receiveAutoDeleteTimer(txn, c, m.getAutoDeleteTimer(),
 				m.getTimestamp());
 	}
@@ -355,6 +359,15 @@ abstract class AbstractProtocolEngine<S extends Session<?>>
 		}
 	}

+	private ContactId getContactId(Transaction txn, GroupId contactGroupId)
+			throws DbException {
+		try {
+			return clientHelper.getContactId(txn, contactGroupId);
+		} catch (FormatException e) {
+			throw new DbException(e);
+		}
+	}
+
 	private boolean contactSupportsAutoDeletion(Transaction txn, ContactId c)
 			throws DbException {
 		int minorVersion = clientVersioningManager.getClientMinorVersion(txn, c,
--- a/briar-core/src/main/java/org/briarproject/briar/privategroup/invitation/CreatorProtocolEngine.java
+++ b/briar-core/src/main/java/org/briarproject/briar/privategroup/invitation/CreatorProtocolEngine.java
@@ -12,6 +12,7 @@ import org.briarproject.bramble.api.sync.Message;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.api.versioning.ClientVersioningManager;
 import org.briarproject.briar.api.autodelete.AutoDeleteManager;
+import org.briarproject.briar.api.client.MessageTracker;
 import org.briarproject.briar.api.client.ProtocolStateException;
 import org.briarproject.briar.api.client.SessionId;
 import org.briarproject.briar.api.conversation.ConversationManager;
@@ -48,12 +49,13 @@ class CreatorProtocolEngine extends AbstractProtocolEngine<CreatorSession> {
 			IdentityManager identityManager,
 			MessageParser messageParser,
 			MessageEncoder messageEncoder,
+			MessageTracker messageTracker,
 			AutoDeleteManager autoDeleteManager,
 			ConversationManager conversationManager,
 			Clock clock) {
 		super(db, clientHelper, clientVersioningManager, privateGroupManager,
 				privateGroupFactory, groupMessageFactory, identityManager,
-				messageParser, messageEncoder,
+				messageParser, messageEncoder, messageTracker,
 				autoDeleteManager, conversationManager, clock);
 	}

@@ -160,7 +162,7 @@ class CreatorProtocolEngine extends AbstractProtocolEngine<CreatorSession> {
 		Message sent = sendInviteMessage(txn, s, text, timestamp, signature,
 				autoDeleteTimer);
 		// Track the message
-		conversationManager.trackOutgoingMessage(txn, sent);
+		messageTracker.trackOutgoingMessage(txn, sent);
 		// Move to the INVITED state
 		long localTimestamp =
 				max(timestamp, getTimestampForVisibleMessage(txn, s));
@@ -197,7 +199,7 @@ class CreatorProtocolEngine extends AbstractProtocolEngine<CreatorSession> {
 		// Mark the response visible in the UI
 		markMessageVisibleInUi(txn, m.getId());
 		// Track the message
-		conversationManager.trackMessage(txn, m.getContactGroupId(),
+		messageTracker.trackMessage(txn, m.getContactGroupId(),
 				m.getTimestamp(), false);
 		// Receive the auto-delete timer
 		receiveAutoDeleteTimer(txn, m);
@@ -224,7 +226,7 @@ class CreatorProtocolEngine extends AbstractProtocolEngine<CreatorSession> {
 		// Mark the response visible in the UI
 		markMessageVisibleInUi(txn, m.getId());
 		// Track the message
-		conversationManager.trackMessage(txn, m.getContactGroupId(),
+		messageTracker.trackMessage(txn, m.getContactGroupId(),
 				m.getTimestamp(), false);
 		// Receive the auto-delete timer
 		receiveAutoDeleteTimer(txn, m);
--- a/briar-core/src/main/java/org/briarproject/briar/privategroup/invitation/InviteeProtocolEngine.java
+++ b/briar-core/src/main/java/org/briarproject/briar/privategroup/invitation/InviteeProtocolEngine.java
@@ -14,6 +14,7 @@ import org.briarproject.bramble.api.sync.MessageId;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.api.versioning.ClientVersioningManager;
 import org.briarproject.briar.api.autodelete.AutoDeleteManager;
+import org.briarproject.briar.api.client.MessageTracker;
 import org.briarproject.briar.api.client.ProtocolStateException;
 import org.briarproject.briar.api.client.SessionId;
 import org.briarproject.briar.api.conversation.ConversationManager;
@@ -52,12 +53,13 @@ class InviteeProtocolEngine extends AbstractProtocolEngine<InviteeSession> {
 			IdentityManager identityManager,
 			MessageParser messageParser,
 			MessageEncoder messageEncoder,
+			MessageTracker messageTracker,
 			AutoDeleteManager autoDeleteManager,
 			ConversationManager conversationManager,
 			Clock clock) {
 		super(db, clientHelper, clientVersioningManager, privateGroupManager,
 				privateGroupFactory, groupMessageFactory, identityManager,
-				messageParser, messageEncoder,
+				messageParser, messageEncoder, messageTracker,
 				autoDeleteManager, conversationManager, clock);
 	}

@@ -186,7 +188,7 @@ class InviteeProtocolEngine extends AbstractProtocolEngine<InviteeSession> {
 		// Send a JOIN message
 		Message sent = sendJoinMessage(txn, s, true);
 		// Track the message
-		conversationManager.trackOutgoingMessage(txn, sent);
+		messageTracker.trackOutgoingMessage(txn, sent);
 		try {
 			// Subscribe to the private group
 			subscribeToPrivateGroup(txn, inviteId);
@@ -210,7 +212,7 @@ class InviteeProtocolEngine extends AbstractProtocolEngine<InviteeSession> {
 		// Send a LEAVE message
 		Message sent = sendLeaveMessage(txn, s, true, isAutoDecline);
 		// Track the message
-		conversationManager.trackOutgoingMessage(txn, sent);
+		messageTracker.trackOutgoingMessage(txn, sent);
 		// Move to the START state
 		return new InviteeSession(s.getContactGroupId(), s.getPrivateGroupId(),
 				sent.getId(), s.getLastRemoteMessageId(), sent.getTimestamp(),
@@ -247,7 +249,7 @@ class InviteeProtocolEngine extends AbstractProtocolEngine<InviteeSession> {
 		markMessageVisibleInUi(txn, m.getId());
 		markMessageAvailableToAnswer(txn, m.getId(), true);
 		// Track the message
-		conversationManager.trackMessage(txn, m.getContactGroupId(),
+		messageTracker.trackMessage(txn, m.getContactGroupId(),
 				m.getTimestamp(), false);
 		// Receive the auto-delete timer
 		receiveAutoDeleteTimer(txn, m);
--- a/briar-core/src/main/java/org/briarproject/briar/privategroup/invitation/PeerProtocolEngine.java
+++ b/briar-core/src/main/java/org/briarproject/briar/privategroup/invitation/PeerProtocolEngine.java
@@ -13,6 +13,7 @@ import org.briarproject.bramble.api.sync.Message;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.api.versioning.ClientVersioningManager;
 import org.briarproject.briar.api.autodelete.AutoDeleteManager;
+import org.briarproject.briar.api.client.MessageTracker;
 import org.briarproject.briar.api.client.ProtocolStateException;
 import org.briarproject.briar.api.conversation.ConversationManager;
 import org.briarproject.briar.api.privategroup.GroupMessageFactory;
@@ -47,12 +48,13 @@ class PeerProtocolEngine extends AbstractProtocolEngine<PeerSession> {
 			IdentityManager identityManager,
 			MessageParser messageParser,
 			MessageEncoder messageEncoder,
+			MessageTracker messageTracker,
 			AutoDeleteManager autoDeleteManager,
 			ConversationManager conversationManager,
 			Clock clock) {
 		super(db, clientHelper, clientVersioningManager, privateGroupManager,
 				privateGroupFactory, groupMessageFactory, identityManager,
-				messageParser, messageEncoder,
+				messageParser, messageEncoder, messageTracker,
 				autoDeleteManager, conversationManager, clock);
 	}

--- a/briar-core/src/main/java/org/briarproject/briar/privategroup/invitation/ProtocolEngineFactoryImpl.java
+++ b/briar-core/src/main/java/org/briarproject/briar/privategroup/invitation/ProtocolEngineFactoryImpl.java
@@ -7,6 +7,7 @@ import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.api.versioning.ClientVersioningManager;
 import org.briarproject.briar.api.autodelete.AutoDeleteManager;
+import org.briarproject.briar.api.client.MessageTracker;
 import org.briarproject.briar.api.conversation.ConversationManager;
 import org.briarproject.briar.api.privategroup.GroupMessageFactory;
 import org.briarproject.briar.api.privategroup.PrivateGroupFactory;
@@ -28,6 +29,7 @@ class ProtocolEngineFactoryImpl implements ProtocolEngineFactory {
 	private final IdentityManager identityManager;
 	private final MessageParser messageParser;
 	private final MessageEncoder messageEncoder;
+	private final MessageTracker messageTracker;
 	private final AutoDeleteManager autoDeleteManager;
 	private final ConversationManager conversationManager;
 	private final Clock clock;
@@ -43,6 +45,7 @@ class ProtocolEngineFactoryImpl implements ProtocolEngineFactory {
 			IdentityManager identityManager,
 			MessageParser messageParser,
 			MessageEncoder messageEncoder,
+			MessageTracker messageTracker,
 			AutoDeleteManager autoDeleteManager,
 			ConversationManager conversationManager,
 			Clock clock) {
@@ -55,6 +58,7 @@ class ProtocolEngineFactoryImpl implements ProtocolEngineFactory {
 		this.identityManager = identityManager;
 		this.messageParser = messageParser;
 		this.messageEncoder = messageEncoder;
+		this.messageTracker = messageTracker;
 		this.autoDeleteManager = autoDeleteManager;
 		this.conversationManager = conversationManager;
 		this.clock = clock;
@@ -65,7 +69,7 @@ class ProtocolEngineFactoryImpl implements ProtocolEngineFactory {
 		return new CreatorProtocolEngine(db, clientHelper,
 				clientVersioningManager, privateGroupManager,
 				privateGroupFactory, groupMessageFactory, identityManager,
-				messageParser, messageEncoder,
+				messageParser, messageEncoder, messageTracker,
 				autoDeleteManager, conversationManager, clock);
 	}

@@ -74,7 +78,7 @@ class ProtocolEngineFactoryImpl implements ProtocolEngineFactory {
 		return new InviteeProtocolEngine(db, clientHelper,
 				clientVersioningManager, privateGroupManager,
 				privateGroupFactory, groupMessageFactory, identityManager,
-				messageParser, messageEncoder,
+				messageParser, messageEncoder, messageTracker,
 				autoDeleteManager, conversationManager, clock);
 	}

@@ -83,7 +87,7 @@ class ProtocolEngineFactoryImpl implements ProtocolEngineFactory {
 		return new PeerProtocolEngine(db, clientHelper,
 				clientVersioningManager, privateGroupManager,
 				privateGroupFactory, groupMessageFactory, identityManager,
-				messageParser, messageEncoder,
+				messageParser, messageEncoder, messageTracker,
 				autoDeleteManager, conversationManager, clock);
 	}
 }
--- a/briar-core/src/main/java/org/briarproject/briar/sharing/BlogProtocolEngineImpl.java
+++ b/briar-core/src/main/java/org/briarproject/briar/sharing/BlogProtocolEngineImpl.java
@@ -19,6 +19,7 @@ import org.briarproject.briar.api.blog.BlogManager;
 import org.briarproject.briar.api.blog.BlogSharingManager;
 import org.briarproject.briar.api.blog.event.BlogInvitationRequestReceivedEvent;
 import org.briarproject.briar.api.blog.event.BlogInvitationResponseReceivedEvent;
+import org.briarproject.briar.api.client.MessageTracker;
 import org.briarproject.briar.api.conversation.ConversationManager;
 import org.briarproject.briar.api.conversation.ConversationRequest;

@@ -40,13 +41,14 @@ class BlogProtocolEngineImpl extends ProtocolEngineImpl<Blog> {
 			ClientVersioningManager clientVersioningManager,
 			MessageEncoder messageEncoder,
 			MessageParser<Blog> messageParser,
+			MessageTracker messageTracker,
 			AutoDeleteManager autoDeleteManager,
 			ConversationManager conversationManager,
 			Clock clock,
 			BlogManager blogManager,
 			InvitationFactory<Blog, BlogInvitationResponse> invitationFactory) {
 		super(db, clientHelper, clientVersioningManager, messageEncoder,
-				messageParser, autoDeleteManager,
+				messageParser, messageTracker, autoDeleteManager,
 				conversationManager, clock, BlogSharingManager.CLIENT_ID,
 				BlogSharingManager.MAJOR_VERSION, BlogManager.CLIENT_ID,
 				BlogManager.MAJOR_VERSION);
--- a/briar-core/src/main/java/org/briarproject/briar/sharing/ForumProtocolEngineImpl.java
+++ b/briar-core/src/main/java/org/briarproject/briar/sharing/ForumProtocolEngineImpl.java
@@ -13,6 +13,7 @@ import org.briarproject.bramble.api.sync.MessageId;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.api.versioning.ClientVersioningManager;
 import org.briarproject.briar.api.autodelete.AutoDeleteManager;
+import org.briarproject.briar.api.client.MessageTracker;
 import org.briarproject.briar.api.conversation.ConversationManager;
 import org.briarproject.briar.api.conversation.ConversationRequest;
 import org.briarproject.briar.api.forum.Forum;
@@ -40,13 +41,14 @@ class ForumProtocolEngineImpl extends ProtocolEngineImpl<Forum> {
 			ClientVersioningManager clientVersioningManager,
 			MessageEncoder messageEncoder,
 			MessageParser<Forum> messageParser,
+			MessageTracker messageTracker,
 			AutoDeleteManager autoDeleteManager,
 			ConversationManager conversationManager,
 			Clock clock,
 			ForumManager forumManager,
 			InvitationFactory<Forum, ForumInvitationResponse> invitationFactory) {
 		super(db, clientHelper, clientVersioningManager, messageEncoder,
-				messageParser, autoDeleteManager,
+				messageParser, messageTracker, autoDeleteManager,
 				conversationManager, clock, ForumSharingManager.CLIENT_ID,
 				ForumSharingManager.MAJOR_VERSION, ForumManager.CLIENT_ID,
 				ForumManager.MAJOR_VERSION);
--- a/briar-core/src/main/java/org/briarproject/briar/sharing/ProtocolEngineImpl.java
+++ b/briar-core/src/main/java/org/briarproject/briar/sharing/ProtocolEngineImpl.java
@@ -19,6 +19,7 @@ import org.briarproject.bramble.api.sync.MessageId;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.api.versioning.ClientVersioningManager;
 import org.briarproject.briar.api.autodelete.AutoDeleteManager;
+import org.briarproject.briar.api.client.MessageTracker;
 import org.briarproject.briar.api.client.ProtocolStateException;
 import org.briarproject.briar.api.conversation.ConversationManager;
 import org.briarproject.briar.api.sharing.Shareable;
@@ -57,6 +58,7 @@ abstract class ProtocolEngineImpl<S extends Shareable>

 	private final ClientVersioningManager clientVersioningManager;
 	private final MessageEncoder messageEncoder;
+	private final MessageTracker messageTracker;
 	private final AutoDeleteManager autoDeleteManager;
 	private final ConversationManager conversationManager;
 	private final Clock clock;
@@ -69,6 +71,7 @@ abstract class ProtocolEngineImpl<S extends Shareable>
 			ClientVersioningManager clientVersioningManager,
 			MessageEncoder messageEncoder,
 			MessageParser<S> messageParser,
+			MessageTracker messageTracker,
 			AutoDeleteManager autoDeleteManager,
 			ConversationManager conversationManager,
 			Clock clock,
@@ -81,6 +84,7 @@ abstract class ProtocolEngineImpl<S extends Shareable>
 		this.clientVersioningManager = clientVersioningManager;
 		this.messageEncoder = messageEncoder;
 		this.messageParser = messageParser;
+		this.messageTracker = messageTracker;
 		this.autoDeleteManager = autoDeleteManager;
 		this.conversationManager = conversationManager;
 		this.clock = clock;
@@ -112,7 +116,7 @@ abstract class ProtocolEngineImpl<S extends Shareable>
 		// Send an INVITE message
 		Message sent = sendInviteMessage(txn, s, text);
 		// Track the message
-		conversationManager.trackOutgoingMessage(txn, sent);
+		messageTracker.trackOutgoingMessage(txn, sent);
 		// Make the shareable visible to the contact
 		try {
 			setShareableVisibility(txn, s, VISIBLE);
@@ -136,7 +140,7 @@ abstract class ProtocolEngineImpl<S extends Shareable>
 		}
 		Message m;
 		long localTimestamp = getTimestampForVisibleMessage(txn, s);
-		ContactId c = clientHelper.getContactId(txn, s.getContactGroupId());
+		ContactId c = getContactId(txn, s.getContactGroupId());
 		if (contactSupportsAutoDeletion(txn, c)) {
 			long timer = autoDeleteManager.getAutoDeleteTimer(txn, c,
 					localTimestamp);
@@ -186,7 +190,7 @@ abstract class ProtocolEngineImpl<S extends Shareable>
 		// Send a ACCEPT message
 		Message sent = sendAcceptMessage(txn, s);
 		// Track the message
-		conversationManager.trackOutgoingMessage(txn, sent);
+		messageTracker.trackOutgoingMessage(txn, sent);
 		try {
 			// Add and subscribe to the shareable
 			addShareable(txn, inviteId);
@@ -208,7 +212,7 @@ abstract class ProtocolEngineImpl<S extends Shareable>
 			throws DbException {
 		Message m;
 		long localTimestamp = getTimestampForVisibleMessage(txn, s);
-		ContactId c = clientHelper.getContactId(txn, s.getContactGroupId());
+		ContactId c = getContactId(txn, s.getContactGroupId());
 		if (contactSupportsAutoDeletion(txn, c)) {
 			long timer = autoDeleteManager.getAutoDeleteTimer(txn, c,
 					localTimestamp);
@@ -256,7 +260,7 @@ abstract class ProtocolEngineImpl<S extends Shareable>
 		// Send a DECLINE message
 		Message sent = sendDeclineMessage(txn, s, isAutoDecline);
 		// Track the message
-		conversationManager.trackOutgoingMessage(txn, sent);
+		messageTracker.trackOutgoingMessage(txn, sent);
 		// Move to the START state
 		return new Session(START, s.getContactGroupId(), s.getShareableId(),
 				sent.getId(), s.getLastRemoteMessageId(), sent.getTimestamp(),
@@ -267,7 +271,7 @@ abstract class ProtocolEngineImpl<S extends Shareable>
 			boolean isAutoDecline) throws DbException {
 		Message m;
 		long localTimestamp = getTimestampForVisibleMessage(txn, s);
-		ContactId c = clientHelper.getContactId(txn, s.getContactGroupId());
+		ContactId c = getContactId(txn, s.getContactGroupId());
 		if (contactSupportsAutoDeletion(txn, c)) {
 			long timer = autoDeleteManager.getAutoDeleteTimer(txn, c,
 					localTimestamp);
@@ -376,7 +380,7 @@ abstract class ProtocolEngineImpl<S extends Shareable>
 		markMessageVisibleInUi(txn, m.getId());
 		markMessageAvailableToAnswer(txn, m.getId(), available);
 		// Track the message
-		conversationManager.trackMessage(txn, m.getContactGroupId(),
+		messageTracker.trackMessage(txn, m.getContactGroupId(),
 				m.getTimestamp(), false);
 		// Receive the auto-delete timer
 		receiveAutoDeleteTimer(txn, m);
@@ -403,7 +407,7 @@ abstract class ProtocolEngineImpl<S extends Shareable>
 		markMessageVisibleInUi(txn, m.getId());
 		markMessageAvailableToAnswer(txn, m.getId(), false);
 		// Track the message
-		conversationManager.trackMessage(txn, m.getContactGroupId(),
+		messageTracker.trackMessage(txn, m.getContactGroupId(),
 				m.getTimestamp(), false);
 		// Receive the auto-delete timer
 		receiveAutoDeleteTimer(txn, m);
@@ -452,7 +456,7 @@ abstract class ProtocolEngineImpl<S extends Shareable>
 		// Mark the response visible in the UI
 		markMessageVisibleInUi(txn, m.getId());
 		// Track the message
-		conversationManager.trackMessage(txn, m.getContactGroupId(),
+		messageTracker.trackMessage(txn, m.getContactGroupId(),
 				m.getTimestamp(), false);
 		// Receive the auto-delete timer
 		receiveAutoDeleteTimer(txn, m);
@@ -507,7 +511,7 @@ abstract class ProtocolEngineImpl<S extends Shareable>
 		// Mark the response visible in the UI
 		markMessageVisibleInUi(txn, m.getId());
 		// Track the message
-		conversationManager.trackMessage(txn, m.getContactGroupId(),
+		messageTracker.trackMessage(txn, m.getContactGroupId(),
 				m.getTimestamp(), false);
 		// Receive the auto-delete timer
 		receiveAutoDeleteTimer(txn, m);
@@ -730,7 +734,7 @@ abstract class ProtocolEngineImpl<S extends Shareable>
 	 */
 	private long getTimestampForVisibleMessage(Transaction txn, Session s)
 			throws DbException {
-		ContactId c = clientHelper.getContactId(txn, s.getContactGroupId());
+		ContactId c = getContactId(txn, s.getContactGroupId());
 		long conversationTimestamp =
 				conversationManager.getTimestampForOutgoingMessage(txn, c);
 		return max(conversationTimestamp, getSessionTimestamp(s) + 1);
@@ -754,11 +758,20 @@ abstract class ProtocolEngineImpl<S extends Shareable>

 	private void receiveAutoDeleteTimer(Transaction txn,
 			DeletableSharingMessage m) throws DbException {
-		ContactId c = clientHelper.getContactId(txn, m.getContactGroupId());
+		ContactId c = getContactId(txn, m.getContactGroupId());
 		autoDeleteManager.receiveAutoDeleteTimer(txn, c, m.getAutoDeleteTimer(),
 				m.getTimestamp());
 	}

+	private ContactId getContactId(Transaction txn, GroupId contactGroupId)
+			throws DbException {
+		try {
+			return clientHelper.getContactId(txn, contactGroupId);
+		} catch (FormatException e) {
+			throw new DbException(e);
+		}
+	}
+
 	private boolean contactSupportsAutoDeletion(Transaction txn, ContactId c)
 			throws DbException {
 		int minorVersion = clientVersioningManager.getClientMinorVersion(txn, c,
--- a/briar-core/src/main/java/org/briarproject/briar/test/TestDataCreatorImpl.java
+++ b/briar-core/src/main/java/org/briarproject/briar/test/TestDataCreatorImpl.java
@@ -4,7 +4,6 @@ import org.briarproject.bramble.api.FormatException;
 import org.briarproject.bramble.api.contact.Contact;
 import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.contact.ContactManager;
-import org.briarproject.bramble.api.crypto.CryptoComponent;
 import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.db.DatabaseComponent;
 import org.briarproject.bramble.api.db.DbException;
@@ -82,7 +81,6 @@ public class TestDataCreatorImpl implements TestDataCreator {

 	private final DatabaseComponent db;
 	private final IdentityManager identityManager;
-	private final CryptoComponent crypto;
 	private final ContactManager contactManager;
 	private final TransportPropertyManager transportPropertyManager;
 	private final MessagingManager messagingManager;
@@ -102,9 +100,7 @@ public class TestDataCreatorImpl implements TestDataCreator {
 			GroupFactory groupFactory,
 			PrivateMessageFactory privateMessageFactory,
 			BlogPostFactory blogPostFactory, DatabaseComponent db,
-			IdentityManager identityManager,
-			CryptoComponent crypto,
-			ContactManager contactManager,
+			IdentityManager identityManager, ContactManager contactManager,
 			TransportPropertyManager transportPropertyManager,
 			MessagingManager messagingManager, BlogManager blogManager,
 			ForumManager forumManager,
@@ -118,7 +114,6 @@ public class TestDataCreatorImpl implements TestDataCreator {
 		this.blogPostFactory = blogPostFactory;
 		this.db = db;
 		this.identityManager = identityManager;
-		this.crypto = crypto;
 		this.contactManager = contactManager;
 		this.transportPropertyManager = transportPropertyManager;
 		this.messagingManager = messagingManager;
@@ -252,7 +247,7 @@ public class TestDataCreatorImpl implements TestDataCreator {
 		// Tor
 		TransportProperties tor = new TransportProperties();
 		String torAddress = getRandomTorAddress();
-		tor.put(TorConstants.PROP_ONION_V3, torAddress);
+		tor.put(TorConstants.PROP_ONION_V2, torAddress);
 		props.put(TorConstants.ID, tor);

 		return props;
@@ -297,9 +292,13 @@ public class TestDataCreatorImpl implements TestDataCreator {
 	}

 	private String getRandomTorAddress() {
-		byte[] pubkeyBytes =
-				crypto.generateSignatureKeyPair().getPublic().getEncoded();
-		return crypto.encodeOnionAddress(pubkeyBytes);
+		StringBuilder sb = new StringBuilder();
+		// address
+		for (int i = 0; i < 16; i++) {
+			if (random.nextBoolean()) sb.append(2 + random.nextInt(6));
+			else sb.append((char) (random.nextInt(26) + 'a'));
+		}
+		return sb.toString();
 	}

 	private void addAvatar(Contact c) throws DbException {
@@ -352,7 +351,7 @@ public class TestDataCreatorImpl implements TestDataCreator {

 	private void createRandomPrivateMessage(ContactId contactId,
 			GroupId groupId, int num) throws DbException {
-		long timestamp = clock.currentTimeMillis() - (long) num * 60 * 1000;
+		long timestamp = clock.currentTimeMillis() - num * 60 * 1000;
 		String text = getRandomText();
 		boolean local = random.nextBoolean();
 		boolean autoDelete = random.nextBoolean();
@@ -401,7 +400,7 @@ public class TestDataCreatorImpl implements TestDataCreator {
 	private void addBlogPost(ContactId contactId, LocalAuthor author, int num)
 			throws DbException {
 		Blog blog = blogManager.getPersonalBlog(author);
-		long timestamp = clock.currentTimeMillis() - (long) num * 60 * 1000;
+		long timestamp = clock.currentTimeMillis() - num * 60 * 1000;
 		String text = getRandomText();
 		try {
 			BlogPost blogPost = blogPostFactory.createBlogPost(blog.getId(),
@@ -439,7 +438,7 @@ public class TestDataCreatorImpl implements TestDataCreator {
 		for (int i = 0; i < numForumPosts; i++) {
 			Contact contact = contacts.get(random.nextInt(contacts.size()));
 			LocalAuthor author = localAuthors.get(contact);
-			long timestamp = clock.currentTimeMillis() - (long) i * 60 * 1000;
+			long timestamp = clock.currentTimeMillis() - i * 60 * 1000;
 			String text = getRandomText();
 			MessageId parent = null;
 			if (random.nextBoolean() && posts.size() > 0) {
--- a/briar-core/src/test/java/org/briarproject/briar/blog/BlogManagerImplTest.java
+++ b/briar-core/src/test/java/org/briarproject/briar/blog/BlogManagerImplTest.java
@@ -19,7 +19,6 @@ import org.briarproject.bramble.api.identity.LocalAuthor;
 import org.briarproject.bramble.api.sync.Group;
 import org.briarproject.bramble.api.sync.Message;
 import org.briarproject.bramble.api.sync.MessageId;
-import org.briarproject.bramble.test.BrambleMockTestCase;
 import org.briarproject.briar.api.blog.Blog;
 import org.briarproject.briar.api.blog.BlogCommentHeader;
 import org.briarproject.briar.api.blog.BlogFactory;
@@ -29,7 +28,9 @@ import org.briarproject.briar.api.blog.BlogPostHeader;
 import org.briarproject.briar.api.blog.event.BlogPostAddedEvent;
 import org.briarproject.briar.api.identity.AuthorInfo;
 import org.briarproject.briar.api.identity.AuthorManager;
+import org.briarproject.briar.test.BriarTestCase;
 import org.jmock.Expectations;
+import org.jmock.Mockery;
 import org.junit.Test;

 import static org.briarproject.bramble.api.sync.validation.IncomingMessageHook.DeliveryAction.ACCEPT_SHARE;
@@ -64,8 +65,9 @@ import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;

-public class BlogManagerImplTest extends BrambleMockTestCase {
+public class BlogManagerImplTest extends BriarTestCase {

+	private final Mockery context = new Mockery();
 	private final BlogManagerImpl blogManager;
 	private final DatabaseComponent db = context.mock(DatabaseComponent.class);
 	private final AuthorManager authorManager =
--- a/briar-core/src/test/java/org/briarproject/briar/blog/BlogPostValidatorTest.java
+++ b/briar-core/src/test/java/org/briarproject/briar/blog/BlogPostValidatorTest.java
@@ -13,10 +13,11 @@ import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.sync.MessageId;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.system.SystemClock;
-import org.briarproject.bramble.test.BrambleMockTestCase;
 import org.briarproject.briar.api.blog.Blog;
 import org.briarproject.briar.api.blog.BlogFactory;
+import org.briarproject.briar.test.BriarTestCase;
 import org.jmock.Expectations;
+import org.jmock.Mockery;
 import org.junit.Test;

 import java.io.IOException;
@@ -46,8 +47,9 @@ import static org.briarproject.briar.api.blog.MessageType.WRAPPED_POST;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;

-public class BlogPostValidatorTest extends BrambleMockTestCase {
+public class BlogPostValidatorTest extends BriarTestCase {

+	private final Mockery context = new Mockery();
 	private final Blog blog, rssBlog;
 	private final BdfList authorList;
 	private final byte[] descriptor;
--- a/briar-core/src/test/java/org/briarproject/briar/feed/FeedManagerIntegrationTest.java
+++ b/briar-core/src/test/java/org/briarproject/briar/feed/FeedManagerIntegrationTest.java
@@ -3,7 +3,6 @@ package org.briarproject.briar.feed;
 import org.briarproject.bramble.api.identity.Identity;
 import org.briarproject.bramble.api.identity.IdentityManager;
 import org.briarproject.bramble.api.lifecycle.LifecycleManager;
-import org.briarproject.bramble.test.BrambleTestCase;
 import org.briarproject.bramble.test.TestDatabaseConfigModule;
 import org.briarproject.bramble.test.TestUtils;
 import org.briarproject.briar.api.blog.Blog;
@@ -11,6 +10,7 @@ import org.briarproject.briar.api.blog.BlogManager;
 import org.briarproject.briar.api.blog.BlogPostHeader;
 import org.briarproject.briar.api.feed.Feed;
 import org.briarproject.briar.api.feed.FeedManager;
+import org.briarproject.briar.test.BriarTestCase;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
@@ -23,7 +23,7 @@ import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertTrue;

-public class FeedManagerIntegrationTest extends BrambleTestCase {
+public class FeedManagerIntegrationTest extends BriarTestCase {

 	private LifecycleManager lifecycleManager;
 	private FeedManager feedManager;
--- a/briar-core/src/test/java/org/briarproject/briar/messaging/MessageSizeIntegrationTest.java
+++ b/briar-core/src/test/java/org/briarproject/briar/messaging/MessageSizeIntegrationTest.java
@@ -10,12 +10,12 @@ 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.test.BrambleTestCase;
 import org.briarproject.briar.api.attachment.AttachmentHeader;
 import org.briarproject.briar.api.forum.ForumPost;
 import org.briarproject.briar.api.forum.ForumPostFactory;
 import org.briarproject.briar.api.messaging.PrivateMessage;
 import org.briarproject.briar.api.messaging.PrivateMessageFactory;
+import org.briarproject.briar.test.BriarTestCase;
 import org.junit.Test;

 import java.io.ByteArrayInputStream;
@@ -41,7 +41,7 @@ import static org.briarproject.briar.api.messaging.MessagingConstants.MAX_PRIVAT
 import static org.briarproject.briar.messaging.MessageTypes.ATTACHMENT;
 import static org.junit.Assert.assertTrue;

-public class MessageSizeIntegrationTest extends BrambleTestCase {
+public class MessageSizeIntegrationTest extends BriarTestCase {

 	@Inject
 	CryptoComponent crypto;
--- a/briar-core/src/test/java/org/briarproject/briar/messaging/SimplexMessagingIntegrationTest.java
+++ b/briar-core/src/test/java/org/briarproject/briar/messaging/SimplexMessagingIntegrationTest.java
@@ -14,7 +14,6 @@ import org.briarproject.bramble.api.sync.GroupId;
 import org.briarproject.bramble.api.sync.MessageId;
 import org.briarproject.bramble.api.sync.event.MessageStateChangedEvent;
 import org.briarproject.bramble.api.sync.event.MessagesSentEvent;
-import org.briarproject.bramble.test.BrambleTestCase;
 import org.briarproject.bramble.test.TestDatabaseConfigModule;
 import org.briarproject.bramble.test.TestTransportConnectionReader;
 import org.briarproject.bramble.test.TestTransportConnectionWriter;
@@ -24,6 +23,7 @@ import org.briarproject.briar.api.messaging.PrivateMessage;
 import org.briarproject.briar.api.messaging.PrivateMessageFactory;
 import org.briarproject.briar.api.messaging.event.AttachmentReceivedEvent;
 import org.briarproject.briar.api.messaging.event.PrivateMessageReceivedEvent;
+import org.briarproject.briar.test.BriarTestCase;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
@@ -44,7 +44,7 @@ import static org.briarproject.bramble.test.TestUtils.getTestDirectory;
 import static org.briarproject.briar.api.autodelete.AutoDeleteConstants.MIN_AUTO_DELETE_TIMER_MS;
 import static org.junit.Assert.assertTrue;

-public class SimplexMessagingIntegrationTest extends BrambleTestCase {
+public class SimplexMessagingIntegrationTest extends BriarTestCase {

 	private static final int TIMEOUT_MS = 5_000;

--- a/briar-core/src/test/java/org/briarproject/briar/privategroup/invitation/AbstractProtocolEngineTest.java
+++ b/briar-core/src/test/java/org/briarproject/briar/privategroup/invitation/AbstractProtocolEngineTest.java
@@ -60,6 +60,7 @@ abstract class AbstractProtocolEngineTest extends BrambleMockTestCase {
 			context.mock(GroupMessageFactory.class);
 	final IdentityManager identityManager = context.mock(IdentityManager.class);
 	final MessageEncoder messageEncoder = context.mock(MessageEncoder.class);
+	final MessageTracker messageTracker = context.mock(MessageTracker.class);
 	final AutoDeleteManager autoDeleteManager =
 			context.mock(AutoDeleteManager.class);
 	final ConversationManager conversationManager =
@@ -263,7 +264,7 @@ abstract class AbstractProtocolEngineTest extends BrambleMockTestCase {

 	void expectTrackUnreadMessage(long timestamp) throws Exception {
 		context.checking(new Expectations() {{
-			oneOf(conversationManager).trackMessage(txn, contactGroupId, timestamp,
+			oneOf(messageTracker).trackMessage(txn, contactGroupId, timestamp,
 					false);
 		}});
 	}
--- a/briar-core/src/test/java/org/briarproject/briar/privategroup/invitation/CreatorProtocolEngineTest.java
+++ b/briar-core/src/test/java/org/briarproject/briar/privategroup/invitation/CreatorProtocolEngineTest.java
@@ -24,7 +24,7 @@ public class CreatorProtocolEngineTest extends AbstractProtocolEngineTest {
 			new CreatorProtocolEngine(db, clientHelper, clientVersioningManager,
 					privateGroupManager, privateGroupFactory,
 					groupMessageFactory, identityManager, messageParser,
-					messageEncoder, autoDeleteManager,
+					messageEncoder, messageTracker, autoDeleteManager,
 					conversationManager, clock);

 	private CreatorSession getDefaultSession(CreatorState state) {
@@ -76,7 +76,7 @@ public class CreatorProtocolEngineTest extends AbstractProtocolEngineTest {
 			will(returnValue(privateGroupGroup));
 			oneOf(privateGroupFactory).parsePrivateGroup(privateGroupGroup);
 			will(returnValue(privateGroup));
-			oneOf(conversationManager).trackOutgoingMessage(txn, message);
+			oneOf(messageTracker).trackOutgoingMessage(txn, message);
 		}});
 		expectSendInviteMessage(text);
 	}
--- a/briar-core/src/test/java/org/briarproject/briar/privategroup/invitation/InviteeProtocolEngineTest.java
+++ b/briar-core/src/test/java/org/briarproject/briar/privategroup/invitation/InviteeProtocolEngineTest.java
@@ -43,7 +43,7 @@ public class InviteeProtocolEngineTest extends AbstractProtocolEngineTest {
 			new InviteeProtocolEngine(db, clientHelper, clientVersioningManager,
 					privateGroupManager, privateGroupFactory,
 					groupMessageFactory, identityManager, messageParser,
-					messageEncoder, autoDeleteManager,
+					messageEncoder, messageTracker, autoDeleteManager,
 					conversationManager, clock);
 	private final LocalAuthor localAuthor = getLocalAuthor();

@@ -148,7 +148,7 @@ public class InviteeProtocolEngineTest extends AbstractProtocolEngineTest {
 		}});
 		expectSendJoinMessage(properJoinMessage, true);
 		context.checking(new Expectations() {{
-			oneOf(conversationManager).trackOutgoingMessage(txn, message);
+			oneOf(messageTracker).trackOutgoingMessage(txn, message);
 			oneOf(messageParser).getInviteMessage(txn, lastRemoteMessageId);
 			will(returnValue(inviteMessage));
 			oneOf(privateGroupFactory)
@@ -219,7 +219,7 @@ public class InviteeProtocolEngineTest extends AbstractProtocolEngineTest {
 		expectMarkMessageAvailableToAnswer(lastRemoteMessageId, false);
 		expectSendLeaveMessage(true);
 		context.checking(new Expectations() {{
-			oneOf(conversationManager).trackOutgoingMessage(txn, message);
+			oneOf(messageTracker).trackOutgoingMessage(txn, message);
 		}});

 		InviteeSession session = getDefaultSession(INVITED);
--- a/briar-core/src/test/java/org/briarproject/briar/privategroup/invitation/PeerProtocolEngineTest.java
+++ b/briar-core/src/test/java/org/briarproject/briar/privategroup/invitation/PeerProtocolEngineTest.java
@@ -27,7 +27,7 @@ public class PeerProtocolEngineTest extends AbstractProtocolEngineTest {
 			new PeerProtocolEngine(db, clientHelper, clientVersioningManager,
 					privateGroupManager, privateGroupFactory,
 					groupMessageFactory, identityManager, messageParser,
-					messageEncoder, autoDeleteManager,
+					messageEncoder, messageTracker, autoDeleteManager,
 					conversationManager, clock);

 	private PeerSession getDefaultSession(PeerState state) {
--- a/briar-core/src/test/java/org/briarproject/briar/test/BriarTestCase.java
+++ b/briar-core/src/test/java/org/briarproject/briar/test/BriarTestCase.java
@@ -0,0 +1,11 @@
+package org.briarproject.briar.test;
+
+import org.briarproject.bramble.test.BrambleTestCase;
+
+public abstract class BriarTestCase extends BrambleTestCase {
+
+	public BriarTestCase() {
+		super();
+	}
+
+}
--- a/briar-core/witness.gradle
+++ b/briar-core/witness.gradle
@@ -1,5 +1,6 @@
 dependencyVerification {
    verify = [
+        'antlr:antlr:2.7.7:antlr-2.7.7.jar:88fbda4b912596b9f56e8e12e580cc954bacfb51776ecfddd3e18fc1cf56dc4c',
        'cglib:cglib:3.2.8:cglib-3.2.8.jar:3f64de999ecc5595dc84ca8ff0879d8a34c8623f9ef3c517a53ed59023fcb9db',
        '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',
@@ -8,17 +9,24 @@ dependencyVerification {
        '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:2.3.2: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: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',
+        'com.puppycrawl.tools:checkstyle:8.27:checkstyle-8.27.jar:26c81958a112ebdfc5d7b40507bbfc8f15f606fea1e55ef5675609ddb41a6053',
        'com.rometools:rome-utils:1.15.0:rome-utils-1.15.0.jar:2aaa1e95e0630ba5f4c183201f5ca6af8cecebcbf3494e7d11b903c9d1277cb8',
        'com.rometools:rome:1.15.0:rome-1.15.0.jar:51cbcedae56ee0c32f25f3a367a6a9dadeef0f591d2f23d03486aec272e4d3f9',
        'com.squareup.okhttp3:okhttp:3.12.13:okhttp-3.12.13.jar:508234e024ef7e270ab1a6d5b356f5b98e786511239ca986d684fd1e2cf7bc82',
        'com.squareup.okio:okio:1.15.0:okio-1.15.0.jar:693fa319a7e8843300602b204023b7674f106ebcb577f2dd5807212b66118bd2',
        'com.squareup:javapoet:1.13.0:javapoet-1.13.0.jar:4c7517e848a71b36d069d12bb3bf46a70fd4cda3105d822b0ed2e19c00b69291',
+        'commons-beanutils:commons-beanutils:1.9.4:commons-beanutils-1.9.4.jar:7d938c81789028045c08c065e94be75fc280527620d5bd62b519d5838532368a',
+        'commons-collections:commons-collections:3.2.2:commons-collections-3.2.2.jar:eeeae917917144a68a741d4c0dff66aa5c5c5fd85593ff217bced3fc8ca783b8',
+        'info.picocli:picocli:4.1.1:picocli-4.1.1.jar:9238b6af4ded57dcfedf6f7dbcf2bdf334dae2f118ea2a0bd6d05066e63ee6fc',
        'javax.annotation:jsr250-api:1.0:jsr250-api-1.0.jar:a1a922d0d9b6d183ed3800dfac01d1e1eb159f0e8c6f94736931c1def54a941f',
        'javax.inject:javax.inject:1:javax.inject-1.jar:91c77044a50c481636c32d916fd89c9118a72195390452c81065080f957de7ff',
        'junit:junit:4.13.2:junit-4.13.2.jar:8e495b634469d64fb8acfa3495a065cbacc8a0fff55ce1e31007be4c16dc57d3',
@@ -26,11 +34,15 @@ dependencyVerification {
        'net.jcip:jcip-annotations:1.0:jcip-annotations-1.0.jar:be5805392060c71474bf6c9a67a099471274d30b83eef84bfc4e0889a4f1dcc0',
        'net.jodah:concurrentunit:0.4.2:concurrentunit-0.4.2.jar:5583078e1acf91734939e985bc9e7ee947b0e93a8eef679da6bb07bbeb47ced3',
        'net.ltgt.gradle.incap:incap:0.2:incap-0.2.jar:b625b9806b0f1e4bc7a2e3457119488de3cd57ea20feedd513db070a573a4ffd',
+        'net.sf.saxon:Saxon-HE:9.9.1-5:Saxon-HE-9.9.1-5.jar:4b39a9e30d5b634b5e91db5f0c6937f176d4517543ababc9b5e01830b8c56620',
+        'org.antlr:antlr4-runtime:4.7.2:antlr4-runtime-4.7.2.jar:4c518b87d4bdff8b44cd8cbc1af816e944b62a3fe5b80b781501cf1f4759bbc4',
        'org.apache-extras.beanshell:bsh:2.0b6:bsh-2.0b6.jar:a17955976070c0573235ee662f2794a78082758b61accffce8d3f8aedcd91047',
        'org.checkerframework:checker-compat-qual:2.5.3:checker-compat-qual-2.5.3.jar:d76b9afea61c7c082908023f0cbc1427fab9abd2df915c8b8a3e7a509bccbc6d',
        'org.checkerframework:checker-qual:2.5.2:checker-qual-2.5.2.jar:64b02691c8b9d4e7700f8ee2e742dce7ea2c6e81e662b7522c9ee3bf568c040a',
+        'org.checkerframework:checker-qual:2.8.1:checker-qual-2.8.1.jar:9103499008bcecd4e948da29b17864abb64304e15706444ae209d17ebe0575df',
        'org.codehaus.mojo.signature:java16:1.1:java16-1.1.signature:53799223a2c98dba2d0add810bed76315460df285c69e4f397ae6098f87dd619',
        'org.codehaus.mojo:animal-sniffer-annotations:1.17:animal-sniffer-annotations-1.17.jar:92654f493ecfec52082e76354f0ebf87648dc3d5cec2e3c3cdb947c016747a53',
+        'org.codehaus.mojo:animal-sniffer-annotations:1.18:animal-sniffer-annotations-1.18.jar:47f05852b48ee9baefef80fa3d8cea60efa4753c0013121dd7fe5eef2e5c729d',
        'org.codehaus.mojo:animal-sniffer-ant-tasks:1.20:animal-sniffer-ant-tasks-1.20.jar:bb7d2498144118311d968bb08ff6fae3fc535fb1cb9cca8b8e9ea65b189422ac',
        'org.codehaus.mojo:animal-sniffer:1.20:animal-sniffer-1.20.jar:80c422523c38db91260c6d78e5ee4b012862ab61cc55020c9e243dd7b5c62249',
        'org.hamcrest:hamcrest-core:2.1:hamcrest-core-2.1.jar:e09109e54a289d88506b9bfec987ddd199f4217c9464132668351b9a4f00bee9',
--- a/briar-headless/build.gradle
+++ b/briar-headless/build.gradle
@@ -7,8 +7,8 @@ import static java.util.Collections.list
 plugins {
 	id 'java'
 	id 'idea'
-	id 'org.jetbrains.kotlin.jvm' version '1.6.0'
-	id 'org.jetbrains.kotlin.kapt' version '1.6.0'
+	id 'org.jetbrains.kotlin.jvm' version '1.4.32'
+	id 'org.jetbrains.kotlin.kapt' version '1.4.32'
 	id 'witness'
 }
 apply from: 'witness.gradle'
@@ -20,7 +20,7 @@ dependencies {
 	implementation project(path: ':briar-core', configuration: 'default')
 	implementation project(path: ':bramble-java', configuration: 'default')

-	implementation 'org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.6.0'
+	implementation 'org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.4.32'
 	implementation 'io.javalin:javalin:3.5.0'
 	implementation 'org.slf4j:slf4j-simple:1.7.30'
 	implementation 'com.fasterxml.jackson.core:jackson-databind:2.12.2'
@@ -36,7 +36,7 @@ dependencies {
 	def junitVersion = '5.5.2'
 	testImplementation "org.junit.jupiter:junit-jupiter-api:$junitVersion"
 	testImplementation "org.junit.jupiter:junit-jupiter-params:$junitVersion"
-	testRuntimeOnly "org.junit.jupiter:junit-jupiter-engine:$junitVersion"
+	testRuntime "org.junit.jupiter:junit-jupiter-engine:$junitVersion"
 	testImplementation 'io.mockk:mockk:1.10.4'
 	testImplementation 'org.skyscreamer:jsonassert:1.5.0'
 	testImplementation 'khttp:khttp:0.1.0'
@@ -126,8 +126,4 @@ test {
 	testLogging {
 		events "passed", "skipped", "failed"
 	}
-    // for problems in ContactControllerIntegrationTest
-    jvmArgs = [
-            '--add-opens', 'java.base/java.net=ALL-UNNAMED',
-    ]
 }
--- a/briar-headless/witness.gradle
+++ b/briar-headless/witness.gradle
@@ -4,7 +4,7 @@ dependencyVerification {
        'com.fasterxml.jackson.core:jackson-core:2.12.2:jackson-core-2.12.2.jar:7883331763729b72735fdd8a117f32eb7d22695babfb37cc99df8392c196efc3',
        'com.fasterxml.jackson.core:jackson-databind:2.12.2:jackson-databind-2.12.2.jar:c4002f861d8d33f3202bf8effabb53acc320c5276cc50c1bfaae73c36ce8db32',
        'com.github.ajalt:clikt:2.2.0:clikt-2.2.0.jar:beb3136d06764ec8ce0810a8fd6c8b7b49d04287d1deef3a07c016e43a458d33',
-        'com.github.gundy:semver4j:0.16.4:semver4j-0.16.4-nodeps.jar:3f59eca516374ccd4fd3551625bf50f8a4b191f700508f7ce4866460a6128af0',
+        'com.github.gundy:semver4j:0.16.4:semver4j-0.16.4.jar:def9b4225fa37219e18f81d01f0e52d73dca1257a38f5475be9dd58f87736510',
        '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.dagger:dagger-compiler:2.24:dagger-compiler-2.24.jar:3c5afb955fb188da485cb2c048eff37dce0e1530b9780a0f2f7187d16d1ccc1f',
@@ -12,18 +12,15 @@ dependencyVerification {
        'com.google.dagger:dagger-spi:2.24:dagger-spi-2.24.jar:c038445d14dbcb4054e61bf49e05009edf26fce4fdc7ec1a9db544784f68e718',
        'com.google.dagger:dagger:2.24:dagger-2.24.jar:550a6e46a6dfcdf1d764887b6090cea94f783327e50e5c73754f18facfc70b64',
        '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: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:29.0-jre:guava-29.0-jre.jar:b22c5fb66d61e7b9522531d04b2f915b5158e80aa0b40ee7282c8bfb07b0da25',
        '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',
        'com.squareup:javapoet:1.11.1:javapoet-1.11.1.jar:9cbf2107be499ec6e95afd36b58e3ca122a24166cdd375732e51267d64058e90',
        'com.vaadin.external.google:android-json:0.0.20131108.vaadin1:android-json-0.0.20131108.vaadin1.jar:dfb7bae2f404cfe0b72b4d23944698cb716b7665171812a0a4d0f5926c0fac79',
-        'de.undercouch:gradle-download-task:4.1.1:gradle-download-task-4.1.1.jar:eb08b570e408d4646705e70a949614d439ea2b11455f1652ab0330de8954dab9',
+        'de.undercouch:gradle-download-task:4.0.2:gradle-download-task-4.0.2.jar:952cbfcc5f21beeccb5925cc5ba648af09839258441dd44d087d64a57d34e87a',
        'io.javalin:javalin:3.5.0:javalin-3.5.0.jar:6618f99ad4c241eefcaf3a02c85adc52ec346c9710e8eb5a3f1a916e3d7acec4',
        'io.mockk:mockk-agent-api:1.10.4:mockk-agent-api-1.10.4.jar:8deb59189b48d5870a746f954ca681424040544812c7ae295f3bef87a9499cfe',
        'io.mockk:mockk-agent-common:1.10.4:mockk-agent-common-1.10.4.jar:13b81a3297a3c15ed9f62b838aaede20347018f07c30cad2ca74a4dd99786f8f',
@@ -38,11 +35,10 @@ dependencyVerification {
        'khttp:khttp:0.1.0:khttp-0.1.0.jar:48ab3bd22e461f2c2e74e3446d8f9568e24aab157f61fdc85ded6c0bfbe9a926',
        'net.bytebuddy:byte-buddy-agent:1.10.14:byte-buddy-agent-1.10.14.jar:30272167eceb1cb68fa84730a12d1abfd1daed6ae0c19fdefee47a9a9a0cfd33',
        'net.bytebuddy:byte-buddy:1.10.14:byte-buddy-1.10.14.jar:0e6b935bfcb3e451d525956acad53ec86ff916d714abdbd32b3d2039771896f8',
-        'net.java.dev.jna:jna:5.6.0:jna-5.6.0.jar:5557e235a8aa2f9766d5dc609d67948f2a8832c2d796cea9ef1d6cbe0b3b7eaf',
        'net.ltgt.gradle.incap:incap:0.2:incap-0.2.jar:b625b9806b0f1e4bc7a2e3457119488de3cd57ea20feedd513db070a573a4ffd',
+        'org.antlr:antlr4-runtime:4.5.2-1:antlr4-runtime-4.5.2-1.jar:e831413004bceed7d915c3a175927b1daabc4974b7b8a6f87bbce886d3550398',
        'org.apiguardian:apiguardian-api:1.1.0:apiguardian-api-1.1.0.jar:a9aae9ff8ae3e17a2a18f79175e82b16267c246fbbd3ca9dfbbb290b08dcfdd4',
        'org.checkerframework:checker-compat-qual:2.5.3:checker-compat-qual-2.5.3.jar:d76b9afea61c7c082908023f0cbc1427fab9abd2df915c8b8a3e7a509bccbc6d',
-        'org.checkerframework:checker-qual:2.11.1:checker-qual-2.11.1.jar:015224a4b1dc6de6da053273d4da7d39cfea20e63038169fc45ac0d1dc9c5938',
        'org.checkerframework:checker-qual:2.5.2:checker-qual-2.5.2.jar:64b02691c8b9d4e7700f8ee2e742dce7ea2c6e81e662b7522c9ee3bf568c040a',
        'org.codehaus.mojo:animal-sniffer-annotations:1.17:animal-sniffer-annotations-1.17.jar:92654f493ecfec52082e76354f0ebf87648dc3d5cec2e3c3cdb947c016747a53',
        'org.eclipse.jetty.websocket:websocket-api:9.4.20.v20190813:websocket-api-9.4.20.v20190813.jar:779a29060cc17bdeeeba147efc884ebff972cfff93dad2d37b11c93f95d4f67b',
@@ -60,35 +56,31 @@ dependencyVerification {
        'org.eclipse.jetty:jetty-webapp:9.4.20.v20190813:jetty-webapp-9.4.20.v20190813.jar:59d9b5f238acb14eac3bf90f755eeabd9fc16c630217d0e7e01b99a38194036c',
        'org.eclipse.jetty:jetty-xml:9.4.20.v20190813:jetty-xml-9.4.20.v20190813.jar:f4411ad9998e4cc202c849bb9b9e93aa2aa761b89a27cc746ca025849d659fd0',
        'org.jetbrains.intellij.deps:trove4j:1.0.20181211:trove4j-1.0.20181211.jar:affb7c85a3c87bdcf69ff1dbb84de11f63dc931293934bc08cd7ab18de083601',
-        'org.jetbrains.kotlin:kotlin-android-extensions:1.6.0:kotlin-android-extensions-1.6.0.jar:4cfaf3f0120517bf1d6d8d3bafcfae1e898c67d3f7c8b7687081bfb8193c7ed4',
-        'org.jetbrains.kotlin:kotlin-annotation-processing-gradle:1.6.0:kotlin-annotation-processing-gradle-1.6.0.jar:8673fffffb00ab16033d90f6c7fec10b5d310ca40fbe43519ab4118bfc84179c',
-        'org.jetbrains.kotlin:kotlin-build-common:1.6.0:kotlin-build-common-1.6.0.jar:e24a7b706ba45618b4ee43966b62501136d0060b032f8e9f18d183da05b1bf43',
-        'org.jetbrains.kotlin:kotlin-compiler-embeddable:1.6.0:kotlin-compiler-embeddable-1.6.0.jar:0366843cd2defdd583c6b16b10bc32b85f28c5bf9510f10e44c886f5bd24c388',
-        'org.jetbrains.kotlin:kotlin-compiler-runner:1.6.0:kotlin-compiler-runner-1.6.0.jar:6af7520af84a442c6abf1bd7285ba71bac7365660b2d08fd04c84ec353633d49',
-        'org.jetbrains.kotlin:kotlin-daemon-client:1.6.0:kotlin-daemon-client-1.6.0.jar:6c1b2fde3315879d0c977e5f2515397e7829bd0adf8921e4c5fdbad832ebc2a1',
-        'org.jetbrains.kotlin:kotlin-daemon-embeddable:1.6.0:kotlin-daemon-embeddable-1.6.0.jar:20d08706aa17762fe5ab03a916d62c9b7ee211d20844a8aabe0db83d9d90284a',
-        'org.jetbrains.kotlin:kotlin-gradle-plugin-api:1.6.0:kotlin-gradle-plugin-api-1.6.0.jar:c8692c338826c48425bfc87fab69cb79fe2d4f5f81ff058c929418bf0da97d15',
-        'org.jetbrains.kotlin:kotlin-gradle-plugin-model:1.6.0:kotlin-gradle-plugin-model-1.6.0.jar:9def4d1cf0d9577a511a2aa4f7f310eccc24243b05c02a717a5131c4c8f9965e',
-        'org.jetbrains.kotlin:kotlin-gradle-plugin:1.6.0:kotlin-gradle-plugin-1.6.0.jar:b7037ad66eb0c9b59badcaa238d1c5426715b797aa7709347307b75c1adac16a',
-        'org.jetbrains.kotlin:kotlin-klib-commonizer-api:1.6.0:kotlin-klib-commonizer-api-1.6.0.jar:fc6ab39e90d82226d9b8bcce01876164e5bafd1ac0a203f3f03078cb1b48301f',
-        'org.jetbrains.kotlin:kotlin-klib-commonizer-embeddable:1.6.0:kotlin-klib-commonizer-embeddable-1.6.0.jar:c7c8116263d285fe538e7c196841e235aa8f7b9d9f6ac3613f88de53b261d8c3',
-        'org.jetbrains.kotlin:kotlin-native-utils:1.6.0:kotlin-native-utils-1.6.0.jar:a0b0fd7deaf4fe10b0671355258bc63759e3d24a7115ceff87bc741bfa7ce9ec',
-        'org.jetbrains.kotlin:kotlin-project-model:1.6.0:kotlin-project-model-1.6.0.jar:38135d3f995fc505d604aed2e82ac5ba858b2a6a3e476899c3b8be47fd222b68',
+        'org.jetbrains.kotlin:kotlin-android-extensions:1.4.32:kotlin-android-extensions-1.4.32.jar:be4dcefa4274c9c93703fec984e53d19cac9b9c95e3567247aa0257267266529',
+        'org.jetbrains.kotlin:kotlin-annotation-processing-gradle:1.4.32:kotlin-annotation-processing-gradle-1.4.32.jar:0ef86e325c44cb7476b862e3319226cb85852b2dc9f37a545e856b617ded1691',
+        'org.jetbrains.kotlin:kotlin-build-common:1.4.32:kotlin-build-common-1.4.32.jar:d8c1fab9ff7dfdb385fc0789da5f2574114926897060fcf7cc6d93207ae88ee4',
+        'org.jetbrains.kotlin:kotlin-compiler-embeddable:1.4.32:kotlin-compiler-embeddable-1.4.32.jar:083d80ea6262faac293d248c32bf89e062a4e44d657ea6a095c8066e31791e5e',
+        'org.jetbrains.kotlin:kotlin-compiler-runner:1.4.32:kotlin-compiler-runner-1.4.32.jar:9f668c4033b8c28eed076f39ad93749911d01671e887369a86fc2a9ed5cb2bc3',
+        'org.jetbrains.kotlin:kotlin-daemon-client:1.4.32:kotlin-daemon-client-1.4.32.jar:4c77d463ba41fb43f9e8a7868fc99712431e8f6b3b8df24aa7df3e5778863a6c',
+        'org.jetbrains.kotlin:kotlin-daemon-embeddable:1.4.32:kotlin-daemon-embeddable-1.4.32.jar:0c52722dfb15d6c79f77e1c1c55caf93d0a480f9e1ee76da751cf0cc1e4b6d19',
+        'org.jetbrains.kotlin:kotlin-gradle-plugin-api:1.4.32:kotlin-gradle-plugin-api-1.4.32.jar:d0655390868ebade8b30a36607f30b0031c898f7f433d3ea5ff8426a9afa056b',
+        'org.jetbrains.kotlin:kotlin-gradle-plugin-model:1.4.32:kotlin-gradle-plugin-model-1.4.32.jar:628b5abe97e47fa8d1bf38e5e58be600f720084a871e8f77d9713a895d0e3b40',
+        'org.jetbrains.kotlin:kotlin-gradle-plugin:1.4.32:kotlin-gradle-plugin-1.4.32.jar:369d6c3636d74e1328a12a689adbf76cc16bcc11cf9d594dda2e4b0952068ad8',
+        'org.jetbrains.kotlin:kotlin-klib-commonizer-embeddable:1.4.32:kotlin-klib-commonizer-embeddable-1.4.32.jar:6e38c9c7dc14c2913a67f1690ccb1efb9bb2d1fe211a5628c9470195cc6e4edf',
        'org.jetbrains.kotlin:kotlin-reflect:1.4.20:kotlin-reflect-1.4.20.jar:3b7c82def79fb96c4579d40a47e37dec872f9f8209ee0da3ce828c39dba612e1',
-        'org.jetbrains.kotlin:kotlin-reflect:1.6.0:kotlin-reflect-1.6.0.jar:c6161884209221db7f5ddb031bb480a3c46bb90d5b65d7cc0167b149aaa9c494',
-        'org.jetbrains.kotlin:kotlin-script-runtime:1.6.0:kotlin-script-runtime-1.6.0.jar:ddca0f765c416e77a4d8816f3d2df6eda953f61af811737846a22033225a0e57',
-        'org.jetbrains.kotlin:kotlin-scripting-common:1.6.0:kotlin-scripting-common-1.6.0.jar:16699b070afc4422300c9ed66e81e98b65f7c691faa852b8d44195e509dd6d22',
-        'org.jetbrains.kotlin:kotlin-scripting-compiler-embeddable:1.6.0:kotlin-scripting-compiler-embeddable-1.6.0.jar:2cd1c6f6af69c16b7934d7d8d67c183349b434f450482d7229a9607136fa0447',
-        'org.jetbrains.kotlin:kotlin-scripting-compiler-impl-embeddable:1.6.0:kotlin-scripting-compiler-impl-embeddable-1.6.0.jar:e4bd48906746e4cd19e016445599dca2683a994da06ac38cad383aac48338da8',
-        'org.jetbrains.kotlin:kotlin-scripting-jvm:1.6.0:kotlin-scripting-jvm-1.6.0.jar:5f6a7ea274cb6c6c4372094a3572df2a392aa5389f1553b824873d62d6003652',
-        'org.jetbrains.kotlin:kotlin-stdlib-common:1.6.0:kotlin-stdlib-common-1.6.0.jar:644a7257c23b51a1fd5068960e40922e3e52c219f11ece3e040a3abc74823f22',
-        'org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.6.0:kotlin-stdlib-jdk7-1.6.0.jar:870d35fd266b2daf64c1080fe51824d3c368f7995384a8d7c5fc2fdc40eb7b3a',
-        'org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.6.0:kotlin-stdlib-jdk8-1.6.0.jar:ab0547c495953214a5f2b28150014f4e02133678d52b77d76375ea235e443dbd',
-        'org.jetbrains.kotlin:kotlin-stdlib:1.6.0:kotlin-stdlib-1.6.0.jar:115daea30b0d484afcf2360237b9d9537f48a4a2f03f3cc2a16577dfc6e90342',
-        'org.jetbrains.kotlin:kotlin-tooling-metadata:1.6.0:kotlin-tooling-metadata-1.6.0.jar:5f79b547f80ceba482d6f71844b23445e109f685eb74481044678cd75c28ad77',
-        'org.jetbrains.kotlin:kotlin-util-io:1.6.0:kotlin-util-io-1.6.0.jar:adb7874ef77128ab3b0953ff49ec801239c837fe7131c3147cef9db8bbdf5739',
-        'org.jetbrains.kotlin:kotlin-util-klib:1.6.0:kotlin-util-klib-1.6.0.jar:a9631c0b7823c69b8d33502a2863e7574308d9f9c12e3f28f4b5bbf6c2a41f74',
-        'org.jetbrains.kotlinx:kotlinx-coroutines-core-jvm:1.5.0:kotlinx-coroutines-core-jvm-1.5.0.jar:78d6cc7135f84d692ff3752fcfd1fa1bbe0940d7df70652e4f1eaeec0c78afbb',
+        'org.jetbrains.kotlin:kotlin-reflect:1.4.32:kotlin-reflect-1.4.32.jar:dbf19e9cdaa9c3c170f3f6f6ce3922f38dfc1d7fa1cab5b7c23a19da8b5eec5b',
+        'org.jetbrains.kotlin:kotlin-script-runtime:1.4.32:kotlin-script-runtime-1.4.32.jar:4496e90565b6cc312213acd65fe8ad6d149264ff12d2f1f6b6ba4122afffbbfe',
+        'org.jetbrains.kotlin:kotlin-scripting-common:1.4.32:kotlin-scripting-common-1.4.32.jar:58705f21ba97f2d2e8b818d3c8167252e2b210a610e5678b008bc779f3745112',
+        'org.jetbrains.kotlin:kotlin-scripting-compiler-embeddable:1.4.32:kotlin-scripting-compiler-embeddable-1.4.32.jar:cc4db11fd2ca73250a30e42d6783973aae13b1e3e71520273d4c1354262ee384',
+        'org.jetbrains.kotlin:kotlin-scripting-compiler-impl-embeddable:1.4.32:kotlin-scripting-compiler-impl-embeddable-1.4.32.jar:66940ccb8c5e182d7d2ac47f0dfeccc224c4deea077361cf3935c4e0460d70ad',
+        'org.jetbrains.kotlin:kotlin-scripting-jvm:1.4.32:kotlin-scripting-jvm-1.4.32.jar:d2ccd108b7d68bf38657487114bd54c95deae375ee959f9e7805c59eb037fb98',
+        'org.jetbrains.kotlin:kotlin-stdlib-common:1.4.32:kotlin-stdlib-common-1.4.32.jar:e1ff6f55ee9e7591dcc633f7757bac25a7edb1cc7f738b37ec652f10f66a4145',
+        'org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.4.32:kotlin-stdlib-jdk7-1.4.32.jar:5f801e75ca27d8791c14b07943c608da27620d910a8093022af57f543d5d98b6',
+        'org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.4.32:kotlin-stdlib-jdk8-1.4.32.jar:adc43e54757b106e0cd7b3b7aa257dff471b61efdabe067fc02b2f57e2396262',
+        'org.jetbrains.kotlin:kotlin-stdlib:1.4.32:kotlin-stdlib-1.4.32.jar:13e9fd3e69dc7230ce0fc873a92a4e5d521d179bcf1bef75a6705baac3bfecba',
+        'org.jetbrains.kotlin:kotlin-util-io:1.4.32:kotlin-util-io-1.4.32.jar:d8b33d8840ff755e686d41b0fa3a27272849a2ac8242554606e8d66462bc607f',
+        'org.jetbrains.kotlin:kotlin-util-klib:1.4.32:kotlin-util-klib-1.4.32.jar:4a80f7a521f70a87798e74416b596336c76d8306594172a4cf142c16e1720081',
+        'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.8:kotlinx-coroutines-core-1.3.8.jar:f8c8b7485d4a575e38e5e94945539d1d4eccd3228a199e1a9aa094e8c26174ee',
        'org.jetbrains:annotations:13.0:annotations-13.0.jar:ace2a10dc8e2d5fd34925ecac03e4988b2c0f851650c94b8cef49ba1bd111478',
        'org.json:json:20150729:json-20150729.jar:38c21b9c3d6d24919cd15d027d20afab0a019ac9205f7ed9083b32bdd42a2353',
        'org.junit.jupiter:junit-jupiter-api:5.5.2:junit-jupiter-api-5.5.2.jar:249a2fdbd3931987c0298d00ca08ed248496e0fc11e0463c08c4f82e0cc79b1c',
--- a/build.gradle
+++ b/build.gradle
@@ -29,15 +29,11 @@ buildscript {
 	}

 	dependencies {
-		classpath 'com.android.tools.build:gradle:7.0.3'
+		classpath 'com.android.tools.build:gradle:4.1.3'
 		classpath 'ru.vyarus:gradle-animalsniffer-plugin:1.5.3'
 		classpath files('libs/gradle-witness.jar')
 	}
-	ext {
-		dagger_version = "2.33"
-		tor_version = "0.3.5.17"
-		obfs4proxy_version = "0.0.12-dev-40245c4a"
-		junit_version = "4.13.2"
-		jmock_version = '2.12.0'
-	}
+	ext.dagger_version = "2.33"
+	ext.junit_version = "4.13.2"
+	ext.jmock_version = '2.12.0'
 }
--- a/config/checkstyle/checkstyle.xml
+++ b/config/checkstyle/checkstyle.xml
@@ -0,0 +1,21 @@
+<!DOCTYPE module PUBLIC
+	"-//Checkstyle//DTD Checkstyle Configuration 1.3//EN"
+	"https://checkstyle.org/dtds/configuration_1_3.dtd">
+<module name="Checker">
+	<property name="tabWidth" value="4" />
+	<property name="charset" value="UTF-8" />
+	<module name="LineLength">
+		<property name="fileExtensions" value="java" />
+		<property name="max" value="100" />
+		<property name="ignorePattern"
+			value="^package.*|^import.*|a href|href|http://|https://|ftp://" />
+	</module>
+	<module name="TreeWalker">
+		<module name="RegexpSinglelineJava">
+			<property name="format" value="^\t* +\t*\S" />
+			<property name="message"
+				value="Line has leading space characters; indentation should be performed with tabs only." />
+			<property name="ignoreComments" value="true" />
+		</module>
+	</module>
+</module>
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
akwizgran	3a13adcffb	Rewrap some lines.	2021-11-04 15:49:44 +00:00
akwizgran	f4d885b647	Add checkstyle plugin.	2021-11-04 15:48:06 +00:00