diff --git a/.idea/codeStyles/Project.xml b/.idea/codeStyles/Project.xml
index e2bacc48..9cbd20b7 100644
--- a/.idea/codeStyles/Project.xml
+++ b/.idea/codeStyles/Project.xml
@@ -26,14 +26,14 @@
           <emptyLine />
         </value>
       </option>
+      <option name="RECORD_COMPONENTS_WRAP" value="5" />
+      <option name="NEW_LINE_AFTER_LPAREN_IN_RECORD_HEADER" value="true" />
+      <option name="RPAREN_ON_NEW_LINE_IN_RECORD_HEADER" value="true" />
       <option name="JD_P_AT_EMPTY_LINES" value="false" />
     </JavaCodeStyleSettings>
     <JetCodeStyleSettings>
       <option name="CODE_STYLE_DEFAULTS" value="KOTLIN_OFFICIAL" />
     </JetCodeStyleSettings>
-    <XML>
-      <option name="XML_LEGACY_SETTINGS_IMPORTED" value="true" />
-    </XML>
     <codeStyleSettings language="JAVA">
       <option name="RIGHT_MARGIN" value="120" />
       <option name="KEEP_LINE_BREAKS" value="false" />
@@ -52,6 +52,7 @@
       <option name="BINARY_OPERATION_SIGN_ON_NEXT_LINE" value="true" />
       <option name="TERNARY_OPERATION_WRAP" value="5" />
       <option name="TERNARY_OPERATION_SIGNS_ON_NEXT_LINE" value="true" />
+      <option name="KEEP_SIMPLE_CLASSES_IN_ONE_LINE" value="true" />
       <option name="ENUM_CONSTANTS_WRAP" value="2" />
     </codeStyleSettings>
     <codeStyleSettings language="XML">
diff --git a/lib/build.gradle.kts b/lib/build.gradle.kts
index 31de50e0..c12ad0a4 100644
--- a/lib/build.gradle.kts
+++ b/lib/build.gradle.kts
@@ -15,6 +15,7 @@ repositories {
 
 dependencies {
     api("com.github.turasa:signal-service-java:2.15.3_unofficial_31")
+    api("com.fasterxml.jackson.core", "jackson-databind", "2.13.0")
     implementation("com.google.protobuf:protobuf-javalite:3.10.0")
     implementation("org.bouncycastle:bcprov-jdk15on:1.69")
     implementation("org.slf4j:slf4j-api:1.7.32")
diff --git a/lib/src/main/java/org/asamk/signal/manager/DeviceLinkInfo.java b/lib/src/main/java/org/asamk/signal/manager/DeviceLinkInfo.java
index 3ba1ef20..3e35aced 100644
--- a/lib/src/main/java/org/asamk/signal/manager/DeviceLinkInfo.java
+++ b/lib/src/main/java/org/asamk/signal/manager/DeviceLinkInfo.java
@@ -15,10 +15,7 @@ import java.util.Map;
 
 import static org.whispersystems.signalservice.internal.util.Util.isEmpty;
 
-public class DeviceLinkInfo {
-
-    final String deviceIdentifier;
-    final ECPublicKey deviceKey;
+public record DeviceLinkInfo(String deviceIdentifier, ECPublicKey deviceKey) {
 
     public static DeviceLinkInfo parseDeviceLinkUri(URI linkUri) throws InvalidKeyException {
         final var rawQuery = linkUri.getRawQuery();
@@ -57,11 +54,6 @@ public class DeviceLinkInfo {
         return map;
     }
 
-    public DeviceLinkInfo(final String deviceIdentifier, final ECPublicKey deviceKey) {
-        this.deviceIdentifier = deviceIdentifier;
-        this.deviceKey = deviceKey;
-    }
-
     public URI createDeviceLinkUri() {
         final var deviceKeyString = Base64.getEncoder().encodeToString(deviceKey.serialize()).replace("=", "");
         try {
diff --git a/lib/src/main/java/org/asamk/signal/manager/JsonStickerPack.java b/lib/src/main/java/org/asamk/signal/manager/JsonStickerPack.java
index 74ee6d02..89114426 100644
--- a/lib/src/main/java/org/asamk/signal/manager/JsonStickerPack.java
+++ b/lib/src/main/java/org/asamk/signal/manager/JsonStickerPack.java
@@ -1,55 +1,8 @@
 package org.asamk.signal.manager;
 
-import com.fasterxml.jackson.annotation.JsonProperty;
-
 import java.util.List;
 
-public class JsonStickerPack {
+public record JsonStickerPack(String title, String author, JsonSticker cover, List<JsonSticker> stickers) {
 
-    @JsonProperty
-    public String title;
-
-    @JsonProperty
-    public String author;
-
-    @JsonProperty
-    public JsonSticker cover;
-
-    @JsonProperty
-    public List<JsonSticker> stickers;
-
-    // For deserialization
-    private JsonStickerPack() {
-    }
-
-    public JsonStickerPack(
-            final String title, final String author, final JsonSticker cover, final List<JsonSticker> stickers
-    ) {
-        this.title = title;
-        this.author = author;
-        this.cover = cover;
-        this.stickers = stickers;
-    }
-
-    public static class JsonSticker {
-
-        @JsonProperty
-        public String emoji;
-
-        @JsonProperty
-        public String file;
-
-        @JsonProperty
-        public String contentType;
-
-        // For deserialization
-        private JsonSticker() {
-        }
-
-        public JsonSticker(final String emoji, final String file, final String contentType) {
-            this.emoji = emoji;
-            this.file = file;
-            this.contentType = contentType;
-        }
-    }
+    public record JsonSticker(String emoji, String file, String contentType) {}
 }
diff --git a/lib/src/main/java/org/asamk/signal/manager/Manager.java b/lib/src/main/java/org/asamk/signal/manager/Manager.java
index 0a8762d9..2cb68d20 100644
--- a/lib/src/main/java/org/asamk/signal/manager/Manager.java
+++ b/lib/src/main/java/org/asamk/signal/manager/Manager.java
@@ -57,11 +57,11 @@ public interface Manager extends Closeable {
     ) throws IOException, NotRegisteredException {
         var pathConfig = PathConfig.createDefault(settingsPath);
 
-        if (!SignalAccount.userExists(pathConfig.getDataPath(), number)) {
+        if (!SignalAccount.userExists(pathConfig.dataPath(), number)) {
             throw new NotRegisteredException();
         }
 
-        var account = SignalAccount.load(pathConfig.getDataPath(), number, true, trustNewIdentity);
+        var account = SignalAccount.load(pathConfig.dataPath(), number, true, trustNewIdentity);
 
         if (!account.isRegistered()) {
             throw new NotRegisteredException();
@@ -74,7 +74,7 @@ public interface Manager extends Closeable {
 
     static List<String> getAllLocalNumbers(File settingsPath) {
         var pathConfig = PathConfig.createDefault(settingsPath);
-        final var dataPath = pathConfig.getDataPath();
+        final var dataPath = pathConfig.dataPath();
         final var files = dataPath.listFiles();
 
         if (files == null) {
diff --git a/lib/src/main/java/org/asamk/signal/manager/ManagerImpl.java b/lib/src/main/java/org/asamk/signal/manager/ManagerImpl.java
index 1a1e735e..fe26e9b4 100644
--- a/lib/src/main/java/org/asamk/signal/manager/ManagerImpl.java
+++ b/lib/src/main/java/org/asamk/signal/manager/ManagerImpl.java
@@ -169,9 +169,9 @@ public class ManagerImpl implements Manager {
                 account.getSignalProtocolStore(),
                 executor,
                 sessionLock);
-        final var avatarStore = new AvatarStore(pathConfig.getAvatarsPath());
-        final var attachmentStore = new AttachmentStore(pathConfig.getAttachmentsPath());
-        final var stickerPackStore = new StickerPackStore(pathConfig.getStickerPacksPath());
+        final var avatarStore = new AvatarStore(pathConfig.avatarsPath());
+        final var attachmentStore = new AttachmentStore(pathConfig.attachmentsPath());
+        final var stickerPackStore = new StickerPackStore(pathConfig.stickerPacksPath());
 
         this.attachmentHelper = new AttachmentHelper(dependencies, attachmentStore);
         this.pinHelper = new PinHelper(dependencies.getKeyBackupService());
@@ -426,7 +426,7 @@ public class ManagerImpl implements Manager {
     public void addDeviceLink(URI linkUri) throws IOException, InvalidKeyException {
         var info = DeviceLinkInfo.parseDeviceLinkUri(linkUri);
 
-        addDevice(info.deviceIdentifier, info.deviceKey);
+        addDevice(info.deviceIdentifier(), info.deviceKey());
     }
 
     private void addDevice(String deviceIdentifier, ECPublicKey deviceKey) throws IOException, InvalidKeyException {
@@ -642,8 +642,8 @@ public class ManagerImpl implements Manager {
     private void applyMessage(
             final SignalServiceDataMessage.Builder messageBuilder, final Message message
     ) throws AttachmentInvalidException, IOException {
-        messageBuilder.withBody(message.getMessageText());
-        final var attachments = message.getAttachments();
+        messageBuilder.withBody(message.messageText());
+        final var attachments = message.attachments();
         if (attachments != null) {
             messageBuilder.withAttachments(attachmentHelper.uploadAttachments(attachments));
         }
diff --git a/lib/src/main/java/org/asamk/signal/manager/PathConfig.java b/lib/src/main/java/org/asamk/signal/manager/PathConfig.java
index 2c851080..d045ac4a 100644
--- a/lib/src/main/java/org/asamk/signal/manager/PathConfig.java
+++ b/lib/src/main/java/org/asamk/signal/manager/PathConfig.java
@@ -2,12 +2,9 @@ package org.asamk.signal.manager;
 
 import java.io.File;
 
-public class PathConfig {
-
-    private final File dataPath;
-    private final File attachmentsPath;
-    private final File avatarsPath;
-    private final File stickerPacksPath;
+public record PathConfig(
+        File dataPath, File attachmentsPath, File avatarsPath, File stickerPacksPath
+) {
 
     public static PathConfig createDefault(final File settingsPath) {
         return new PathConfig(new File(settingsPath, "data"),
@@ -15,29 +12,4 @@ public class PathConfig {
                 new File(settingsPath, "avatars"),
                 new File(settingsPath, "stickers"));
     }
-
-    private PathConfig(
-            final File dataPath, final File attachmentsPath, final File avatarsPath, final File stickerPacksPath
-    ) {
-        this.dataPath = dataPath;
-        this.attachmentsPath = attachmentsPath;
-        this.avatarsPath = avatarsPath;
-        this.stickerPacksPath = stickerPacksPath;
-    }
-
-    public File getDataPath() {
-        return dataPath;
-    }
-
-    public File getAttachmentsPath() {
-        return attachmentsPath;
-    }
-
-    public File getAvatarsPath() {
-        return avatarsPath;
-    }
-
-    public File getStickerPacksPath() {
-        return stickerPacksPath;
-    }
 }
diff --git a/lib/src/main/java/org/asamk/signal/manager/ProvisioningManager.java b/lib/src/main/java/org/asamk/signal/manager/ProvisioningManager.java
index c7876569..8855e062 100644
--- a/lib/src/main/java/org/asamk/signal/manager/ProvisioningManager.java
+++ b/lib/src/main/java/org/asamk/signal/manager/ProvisioningManager.java
@@ -95,8 +95,8 @@ public class ProvisioningManager {
 
         logger.info("Received link information from {}, linking in progress ...", number);
 
-        if (SignalAccount.userExists(pathConfig.getDataPath(), number) && !canRelinkExistingAccount(number)) {
-            throw new UserAlreadyExists(number, SignalAccount.getFileName(pathConfig.getDataPath(), number));
+        if (SignalAccount.userExists(pathConfig.dataPath(), number) && !canRelinkExistingAccount(number)) {
+            throw new UserAlreadyExists(number, SignalAccount.getFileName(pathConfig.dataPath(), number));
         }
 
         var encryptedDeviceName = deviceName == null
@@ -115,7 +115,7 @@ public class ProvisioningManager {
 
         SignalAccount account = null;
         try {
-            account = SignalAccount.createOrUpdateLinkedAccount(pathConfig.getDataPath(),
+            account = SignalAccount.createOrUpdateLinkedAccount(pathConfig.dataPath(),
                     number,
                     ret.getUuid(),
                     password,
@@ -165,7 +165,7 @@ public class ProvisioningManager {
     private boolean canRelinkExistingAccount(final String number) throws IOException {
         final SignalAccount signalAccount;
         try {
-            signalAccount = SignalAccount.load(pathConfig.getDataPath(), number, false, TrustNewIdentity.ON_FIRST_USE);
+            signalAccount = SignalAccount.load(pathConfig.dataPath(), number, false, TrustNewIdentity.ON_FIRST_USE);
         } catch (IOException e) {
             logger.debug("Account in use or failed to load.", e);
             return false;
diff --git a/lib/src/main/java/org/asamk/signal/manager/RegistrationManager.java b/lib/src/main/java/org/asamk/signal/manager/RegistrationManager.java
index c42782f7..8a96dad0 100644
--- a/lib/src/main/java/org/asamk/signal/manager/RegistrationManager.java
+++ b/lib/src/main/java/org/asamk/signal/manager/RegistrationManager.java
@@ -96,12 +96,12 @@ public class RegistrationManager implements Closeable {
         var pathConfig = PathConfig.createDefault(settingsPath);
 
         final var serviceConfiguration = ServiceConfig.getServiceEnvironmentConfig(serviceEnvironment, userAgent);
-        if (!SignalAccount.userExists(pathConfig.getDataPath(), number)) {
+        if (!SignalAccount.userExists(pathConfig.dataPath(), number)) {
             var identityKey = KeyUtils.generateIdentityKeyPair();
             var registrationId = KeyHelper.generateRegistrationId(false);
 
             var profileKey = KeyUtils.createProfileKey();
-            var account = SignalAccount.create(pathConfig.getDataPath(),
+            var account = SignalAccount.create(pathConfig.dataPath(),
                     number,
                     identityKey,
                     registrationId,
@@ -111,7 +111,7 @@ public class RegistrationManager implements Closeable {
             return new RegistrationManager(account, pathConfig, serviceConfiguration, userAgent);
         }
 
-        var account = SignalAccount.load(pathConfig.getDataPath(), number, true, TrustNewIdentity.ON_FIRST_USE);
+        var account = SignalAccount.load(pathConfig.dataPath(), number, true, TrustNewIdentity.ON_FIRST_USE);
 
         return new RegistrationManager(account, pathConfig, serviceConfiguration, userAgent);
     }
diff --git a/lib/src/main/java/org/asamk/signal/manager/api/Device.java b/lib/src/main/java/org/asamk/signal/manager/api/Device.java
index 9ee0d36a..bd67052d 100644
--- a/lib/src/main/java/org/asamk/signal/manager/api/Device.java
+++ b/lib/src/main/java/org/asamk/signal/manager/api/Device.java
@@ -1,38 +1,3 @@
 package org.asamk.signal.manager.api;
 
-public class Device {
-
-    private final long id;
-    private final String name;
-    private final long created;
-    private final long lastSeen;
-    private final boolean thisDevice;
-
-    public Device(long id, String name, long created, long lastSeen, final boolean thisDevice) {
-        this.id = id;
-        this.name = name;
-        this.created = created;
-        this.lastSeen = lastSeen;
-        this.thisDevice = thisDevice;
-    }
-
-    public long getId() {
-        return id;
-    }
-
-    public String getName() {
-        return name;
-    }
-
-    public long getCreated() {
-        return created;
-    }
-
-    public long getLastSeen() {
-        return lastSeen;
-    }
-
-    public boolean isThisDevice() {
-        return thisDevice;
-    }
-}
+public record Device(long id, String name, long created, long lastSeen, boolean isThisDevice) {}
diff --git a/lib/src/main/java/org/asamk/signal/manager/api/Group.java b/lib/src/main/java/org/asamk/signal/manager/api/Group.java
index 4787ef95..88be3539 100644
--- a/lib/src/main/java/org/asamk/signal/manager/api/Group.java
+++ b/lib/src/main/java/org/asamk/signal/manager/api/Group.java
@@ -7,116 +7,20 @@ import org.asamk.signal.manager.storage.recipients.RecipientAddress;
 
 import java.util.Set;
 
-public class Group {
-
-    private final GroupId groupId;
-    private final String title;
-    private final String description;
-    private final GroupInviteLinkUrl groupInviteLinkUrl;
-    private final Set<RecipientAddress> members;
-    private final Set<RecipientAddress> pendingMembers;
-    private final Set<RecipientAddress> requestingMembers;
-    private final Set<RecipientAddress> adminMembers;
-    private final boolean isBlocked;
-    private final int messageExpirationTimer;
-
-    private final GroupPermission permissionAddMember;
-    private final GroupPermission permissionEditDetails;
-    private final GroupPermission permissionSendMessage;
-    private final boolean isMember;
-    private final boolean isAdmin;
-
-    public Group(
-            final GroupId groupId,
-            final String title,
-            final String description,
-            final GroupInviteLinkUrl groupInviteLinkUrl,
-            final Set<RecipientAddress> members,
-            final Set<RecipientAddress> pendingMembers,
-            final Set<RecipientAddress> requestingMembers,
-            final Set<RecipientAddress> adminMembers,
-            final boolean isBlocked,
-            final int messageExpirationTimer,
-            final GroupPermission permissionAddMember,
-            final GroupPermission permissionEditDetails,
-            final GroupPermission permissionSendMessage,
-            final boolean isMember,
-            final boolean isAdmin
-    ) {
-        this.groupId = groupId;
-        this.title = title;
-        this.description = description;
-        this.groupInviteLinkUrl = groupInviteLinkUrl;
-        this.members = members;
-        this.pendingMembers = pendingMembers;
-        this.requestingMembers = requestingMembers;
-        this.adminMembers = adminMembers;
-        this.isBlocked = isBlocked;
-        this.messageExpirationTimer = messageExpirationTimer;
-        this.permissionAddMember = permissionAddMember;
-        this.permissionEditDetails = permissionEditDetails;
-        this.permissionSendMessage = permissionSendMessage;
-        this.isMember = isMember;
-        this.isAdmin = isAdmin;
-    }
-
-    public GroupId getGroupId() {
-        return groupId;
-    }
-
-    public String getTitle() {
-        return title;
-    }
-
-    public String getDescription() {
-        return description;
-    }
-
-    public GroupInviteLinkUrl getGroupInviteLinkUrl() {
-        return groupInviteLinkUrl;
-    }
-
-    public Set<RecipientAddress> getMembers() {
-        return members;
-    }
-
-    public Set<RecipientAddress> getPendingMembers() {
-        return pendingMembers;
-    }
-
-    public Set<RecipientAddress> getRequestingMembers() {
-        return requestingMembers;
-    }
-
-    public Set<RecipientAddress> getAdminMembers() {
-        return adminMembers;
-    }
-
-    public boolean isBlocked() {
-        return isBlocked;
-    }
-
-    public int getMessageExpirationTimer() {
-        return messageExpirationTimer;
-    }
-
-    public GroupPermission getPermissionAddMember() {
-        return permissionAddMember;
-    }
-
-    public GroupPermission getPermissionEditDetails() {
-        return permissionEditDetails;
-    }
-
-    public GroupPermission getPermissionSendMessage() {
-        return permissionSendMessage;
-    }
-
-    public boolean isMember() {
-        return isMember;
-    }
-
-    public boolean isAdmin() {
-        return isAdmin;
-    }
-}
+public record Group(
+        GroupId groupId,
+        String title,
+        String description,
+        GroupInviteLinkUrl groupInviteLinkUrl,
+        Set<RecipientAddress> members,
+        Set<RecipientAddress> pendingMembers,
+        Set<RecipientAddress> requestingMembers,
+        Set<RecipientAddress> adminMembers,
+        boolean isBlocked,
+        int messageExpirationTimer,
+        GroupPermission permissionAddMember,
+        GroupPermission permissionEditDetails,
+        GroupPermission permissionSendMessage,
+        boolean isMember,
+        boolean isAdmin
+) {}
diff --git a/lib/src/main/java/org/asamk/signal/manager/api/Identity.java b/lib/src/main/java/org/asamk/signal/manager/api/Identity.java
index 4f6f21f6..37d298f9 100644
--- a/lib/src/main/java/org/asamk/signal/manager/api/Identity.java
+++ b/lib/src/main/java/org/asamk/signal/manager/api/Identity.java
@@ -6,60 +6,16 @@ import org.whispersystems.libsignal.IdentityKey;
 
 import java.util.Date;
 
-public class Identity {
-
-    private final RecipientAddress recipient;
-    private final IdentityKey identityKey;
-    private final String safetyNumber;
-    private final byte[] scannableSafetyNumber;
-    private final TrustLevel trustLevel;
-    private final Date dateAdded;
-
-    public Identity(
-            final RecipientAddress recipient,
-            final IdentityKey identityKey,
-            final String safetyNumber,
-            final byte[] scannableSafetyNumber,
-            final TrustLevel trustLevel,
-            final Date dateAdded
-    ) {
-        this.recipient = recipient;
-        this.identityKey = identityKey;
-        this.safetyNumber = safetyNumber;
-        this.scannableSafetyNumber = scannableSafetyNumber;
-        this.trustLevel = trustLevel;
-        this.dateAdded = dateAdded;
-    }
-
-    public RecipientAddress getRecipient() {
-        return recipient;
-    }
-
-    public IdentityKey getIdentityKey() {
-        return this.identityKey;
-    }
-
-    public TrustLevel getTrustLevel() {
-        return this.trustLevel;
-    }
-
-    boolean isTrusted() {
-        return trustLevel == TrustLevel.TRUSTED_UNVERIFIED || trustLevel == TrustLevel.TRUSTED_VERIFIED;
-    }
-
-    public Date getDateAdded() {
-        return this.dateAdded;
-    }
+public record Identity(
+        RecipientAddress recipient,
+        IdentityKey identityKey,
+        String safetyNumber,
+        byte[] scannableSafetyNumber,
+        TrustLevel trustLevel,
+        Date dateAdded
+) {
 
     public byte[] getFingerprint() {
         return identityKey.getPublicKey().serialize();
     }
-
-    public String getSafetyNumber() {
-        return safetyNumber;
-    }
-
-    public byte[] getScannableSafetyNumber() {
-        return scannableSafetyNumber;
-    }
 }
diff --git a/lib/src/main/java/org/asamk/signal/manager/api/Message.java b/lib/src/main/java/org/asamk/signal/manager/api/Message.java
index dee18524..83666003 100644
--- a/lib/src/main/java/org/asamk/signal/manager/api/Message.java
+++ b/lib/src/main/java/org/asamk/signal/manager/api/Message.java
@@ -2,21 +2,4 @@ package org.asamk.signal.manager.api;
 
 import java.util.List;
 
-public class Message {
-
-    private final String messageText;
-    private final List<String> attachments;
-
-    public Message(final String messageText, final List<String> attachments) {
-        this.messageText = messageText;
-        this.attachments = attachments;
-    }
-
-    public String getMessageText() {
-        return messageText;
-    }
-
-    public List<String> getAttachments() {
-        return attachments;
-    }
-}
+public record Message(String messageText, List<String> attachments) {}
diff --git a/lib/src/main/java/org/asamk/signal/manager/api/SendGroupMessageResults.java b/lib/src/main/java/org/asamk/signal/manager/api/SendGroupMessageResults.java
index d5c9ef91..54f55b92 100644
--- a/lib/src/main/java/org/asamk/signal/manager/api/SendGroupMessageResults.java
+++ b/lib/src/main/java/org/asamk/signal/manager/api/SendGroupMessageResults.java
@@ -4,23 +4,4 @@ import org.whispersystems.signalservice.api.messages.SendMessageResult;
 
 import java.util.List;
 
-public class SendGroupMessageResults {
-
-    private final long timestamp;
-    private final List<SendMessageResult> results;
-
-    public SendGroupMessageResults(
-            final long timestamp, final List<SendMessageResult> results
-    ) {
-        this.timestamp = timestamp;
-        this.results = results;
-    }
-
-    public long getTimestamp() {
-        return timestamp;
-    }
-
-    public List<SendMessageResult> getResults() {
-        return results;
-    }
-}
+public record SendGroupMessageResults(long timestamp, List<SendMessageResult> results) {}
diff --git a/lib/src/main/java/org/asamk/signal/manager/api/SendMessageResults.java b/lib/src/main/java/org/asamk/signal/manager/api/SendMessageResults.java
index ff323919..064532c0 100644
--- a/lib/src/main/java/org/asamk/signal/manager/api/SendMessageResults.java
+++ b/lib/src/main/java/org/asamk/signal/manager/api/SendMessageResults.java
@@ -5,23 +5,4 @@ import org.whispersystems.signalservice.api.messages.SendMessageResult;
 import java.util.List;
 import java.util.Map;
 
-public class SendMessageResults {
-
-    private final long timestamp;
-    private final Map<RecipientIdentifier, List<SendMessageResult>> results;
-
-    public SendMessageResults(
-            final long timestamp, final Map<RecipientIdentifier, List<SendMessageResult>> results
-    ) {
-        this.timestamp = timestamp;
-        this.results = results;
-    }
-
-    public long getTimestamp() {
-        return timestamp;
-    }
-
-    public Map<RecipientIdentifier, List<SendMessageResult>> getResults() {
-        return results;
-    }
-}
+public record SendMessageResults(long timestamp, Map<RecipientIdentifier, List<SendMessageResult>> results) {}
diff --git a/lib/src/main/java/org/asamk/signal/manager/configuration/ConfigurationStore.java b/lib/src/main/java/org/asamk/signal/manager/configuration/ConfigurationStore.java
index e7e1b5f5..09d5162e 100644
--- a/lib/src/main/java/org/asamk/signal/manager/configuration/ConfigurationStore.java
+++ b/lib/src/main/java/org/asamk/signal/manager/configuration/ConfigurationStore.java
@@ -62,29 +62,9 @@ public class ConfigurationStore {
         return new Storage(readReceipts, unidentifiedDeliveryIndicators, typingIndicators, linkPreviews);
     }
 
-    public static final class Storage {
-
-        public Boolean readReceipts;
-        public Boolean unidentifiedDeliveryIndicators;
-        public Boolean typingIndicators;
-        public Boolean linkPreviews;
-
-        // For deserialization
-        private Storage() {
-        }
-
-        public Storage(
-                final Boolean readReceipts,
-                final Boolean unidentifiedDeliveryIndicators,
-                final Boolean typingIndicators,
-                final Boolean linkPreviews
-        ) {
-            this.readReceipts = readReceipts;
-            this.unidentifiedDeliveryIndicators = unidentifiedDeliveryIndicators;
-            this.typingIndicators = typingIndicators;
-            this.linkPreviews = linkPreviews;
-        }
-    }
+    public record Storage(
+            Boolean readReceipts, Boolean unidentifiedDeliveryIndicators, Boolean typingIndicators, Boolean linkPreviews
+    ) {}
 
     public interface Saver {
 
diff --git a/lib/src/main/java/org/asamk/signal/manager/storage/groups/GroupStore.java b/lib/src/main/java/org/asamk/signal/manager/storage/groups/GroupStore.java
index 5cef1b33..cfa39bc9 100644
--- a/lib/src/main/java/org/asamk/signal/manager/storage/groups/GroupStore.java
+++ b/lib/src/main/java/org/asamk/signal/manager/storage/groups/GroupStore.java
@@ -262,7 +262,7 @@ public class GroupStore {
                         g1.blocked,
                         g1.archived,
                         g1.members.stream()
-                                .map(m -> new Storage.GroupV1.Member(m.getId(), null, null))
+                                .map(m -> new Storage.GroupV1.Member(m.id(), null, null))
                                 .collect(Collectors.toList()));
             }
 
@@ -274,91 +274,22 @@ public class GroupStore {
         }).collect(Collectors.toList()));
     }
 
-    public static class Storage {
+    public record Storage(@JsonDeserialize(using = GroupsDeserializer.class) List<Object> groups) {
 
-        @JsonDeserialize(using = GroupsDeserializer.class)
-        public List<Storage.Group> groups;
+        private record GroupV1(
+                String groupId,
+                String expectedV2Id,
+                String name,
+                String color,
+                int messageExpirationTime,
+                boolean blocked,
+                boolean archived,
+                @JsonDeserialize(using = MembersDeserializer.class) @JsonSerialize(using = MembersSerializer.class) List<Member> members
+        ) {
 
-        // For deserialization
-        public Storage() {
-        }
+            private record Member(Long recipientId, String uuid, String number) {}
 
-        public Storage(final List<Storage.Group> groups) {
-            this.groups = groups;
-        }
-
-        private abstract static class Group {
-
-        }
-
-        private static class GroupV1 extends Group {
-
-            public String groupId;
-            public String expectedV2Id;
-            public String name;
-            public String color;
-            public int messageExpirationTime;
-            public boolean blocked;
-            public boolean archived;
-
-            @JsonDeserialize(using = MembersDeserializer.class)
-            @JsonSerialize(using = MembersSerializer.class)
-            public List<Member> members;
-
-            // For deserialization
-            public GroupV1() {
-            }
-
-            public GroupV1(
-                    final String groupId,
-                    final String expectedV2Id,
-                    final String name,
-                    final String color,
-                    final int messageExpirationTime,
-                    final boolean blocked,
-                    final boolean archived,
-                    final List<Member> members
-            ) {
-                this.groupId = groupId;
-                this.expectedV2Id = expectedV2Id;
-                this.name = name;
-                this.color = color;
-                this.messageExpirationTime = messageExpirationTime;
-                this.blocked = blocked;
-                this.archived = archived;
-                this.members = members;
-            }
-
-            private static final class Member {
-
-                public Long recipientId;
-
-                public String uuid;
-
-                public String number;
-
-                Member(Long recipientId, final String uuid, final String number) {
-                    this.recipientId = recipientId;
-                    this.uuid = uuid;
-                    this.number = number;
-                }
-            }
-
-            private static final class JsonRecipientAddress {
-
-                public String uuid;
-
-                public String number;
-
-                // For deserialization
-                public JsonRecipientAddress() {
-                }
-
-                JsonRecipientAddress(final String uuid, final String number) {
-                    this.uuid = uuid;
-                    this.number = number;
-                }
-            }
+            private record JsonRecipientAddress(String uuid, String number) {}
 
             private static class MembersSerializer extends JsonSerializer<List<Member>> {
 
@@ -366,7 +297,7 @@ public class GroupStore {
                 public void serialize(
                         final List<Member> value, final JsonGenerator jgen, final SerializerProvider provider
                 ) throws IOException {
-                    jgen.writeStartArray(value.size());
+                    jgen.writeStartArray(null, value.size());
                     for (var address : value) {
                         if (address.recipientId != null) {
                             jgen.writeNumber(address.recipientId);
@@ -404,39 +335,19 @@ public class GroupStore {
             }
         }
 
-        private static class GroupV2 extends Group {
-
-            public String groupId;
-            public String masterKey;
-            public boolean blocked;
-            public boolean permissionDenied;
-
-            // For deserialization
-            private GroupV2() {
-            }
-
-            public GroupV2(
-                    final String groupId, final String masterKey, final boolean blocked, final boolean permissionDenied
-            ) {
-                this.groupId = groupId;
-                this.masterKey = masterKey;
-                this.blocked = blocked;
-                this.permissionDenied = permissionDenied;
-            }
-        }
-
+        private record GroupV2(String groupId, String masterKey, boolean blocked, boolean permissionDenied) {}
     }
 
-    private static class GroupsDeserializer extends JsonDeserializer<List<Storage.Group>> {
+    private static class GroupsDeserializer extends JsonDeserializer<List<Object>> {
 
         @Override
-        public List<Storage.Group> deserialize(
+        public List<Object> deserialize(
                 JsonParser jsonParser, DeserializationContext deserializationContext
         ) throws IOException {
-            var groups = new ArrayList<Storage.Group>();
+            var groups = new ArrayList<>();
             JsonNode node = jsonParser.getCodec().readTree(jsonParser);
             for (var n : node) {
-                Storage.Group g;
+                Object g;
                 if (n.hasNonNull("masterKey")) {
                     // a v2 group
                     g = jsonParser.getCodec().treeToValue(n, Storage.GroupV2.class);
diff --git a/lib/src/main/java/org/asamk/signal/manager/storage/identities/IdentityKeyStore.java b/lib/src/main/java/org/asamk/signal/manager/storage/identities/IdentityKeyStore.java
index f24e77b1..fdea8b58 100644
--- a/lib/src/main/java/org/asamk/signal/manager/storage/identities/IdentityKeyStore.java
+++ b/lib/src/main/java/org/asamk/signal/manager/storage/identities/IdentityKeyStore.java
@@ -185,7 +185,7 @@ public class IdentityKeyStore implements org.whispersystems.libsignal.state.Iden
         } catch (IOException e) {
             throw new AssertionError("Failed to create identities path", e);
         }
-        return new File(identitiesPath, String.valueOf(recipientId.getId()));
+        return new File(identitiesPath, String.valueOf(recipientId.id()));
     }
 
     private IdentityInfo loadIdentityLocked(final RecipientId recipientId) {
@@ -203,9 +203,9 @@ public class IdentityKeyStore implements org.whispersystems.libsignal.state.Iden
         try (var inputStream = new FileInputStream(file)) {
             var storage = objectMapper.readValue(inputStream, IdentityStorage.class);
 
-            var id = new IdentityKey(Base64.getDecoder().decode(storage.getIdentityKey()));
-            var trustLevel = TrustLevel.fromInt(storage.getTrustLevel());
-            var added = new Date(storage.getAddedTimestamp());
+            var id = new IdentityKey(Base64.getDecoder().decode(storage.identityKey()));
+            var trustLevel = TrustLevel.fromInt(storage.trustLevel());
+            var added = new Date(storage.addedTimestamp());
 
             final var identityInfo = new IdentityInfo(recipientId, id, trustLevel, added);
             cachedIdentities.put(recipientId, identityInfo);
@@ -251,32 +251,5 @@ public class IdentityKeyStore implements org.whispersystems.libsignal.state.Iden
         }
     }
 
-    private static final class IdentityStorage {
-
-        private String identityKey;
-        private int trustLevel;
-        private long addedTimestamp;
-
-        // For deserialization
-        private IdentityStorage() {
-        }
-
-        private IdentityStorage(final String identityKey, final int trustLevel, final long addedTimestamp) {
-            this.identityKey = identityKey;
-            this.trustLevel = trustLevel;
-            this.addedTimestamp = addedTimestamp;
-        }
-
-        public String getIdentityKey() {
-            return identityKey;
-        }
-
-        public int getTrustLevel() {
-            return trustLevel;
-        }
-
-        public long getAddedTimestamp() {
-            return addedTimestamp;
-        }
-    }
+    private record IdentityStorage(String identityKey, int trustLevel, long addedTimestamp) {}
 }
diff --git a/lib/src/main/java/org/asamk/signal/manager/storage/messageCache/MessageCache.java b/lib/src/main/java/org/asamk/signal/manager/storage/messageCache/MessageCache.java
index fc517278..0ba0a8d5 100644
--- a/lib/src/main/java/org/asamk/signal/manager/storage/messageCache/MessageCache.java
+++ b/lib/src/main/java/org/asamk/signal/manager/storage/messageCache/MessageCache.java
@@ -76,7 +76,7 @@ public class MessageCache {
             return messageCachePath;
         }
 
-        var sender = String.valueOf(recipientId.getId());
+        var sender = String.valueOf(recipientId.id());
         return new File(messageCachePath, sender.replace("/", "_"));
     }
 
diff --git a/lib/src/main/java/org/asamk/signal/manager/storage/recipients/RecipientId.java b/lib/src/main/java/org/asamk/signal/manager/storage/recipients/RecipientId.java
index f093ca33..d7aa373d 100644
--- a/lib/src/main/java/org/asamk/signal/manager/storage/recipients/RecipientId.java
+++ b/lib/src/main/java/org/asamk/signal/manager/storage/recipients/RecipientId.java
@@ -1,38 +1,8 @@
 package org.asamk.signal.manager.storage.recipients;
 
-public class RecipientId {
-
-    private final long id;
-
-    RecipientId(final long id) {
-        this.id = id;
-    }
+public record RecipientId(long id) {
 
     public static RecipientId of(long id) {
         return new RecipientId(id);
     }
-
-    public long getId() {
-        return id;
-    }
-
-    @Override
-    public String toString() {
-        return "RecipientId{" + "id=" + id + '}';
-    }
-
-    @Override
-    public boolean equals(final Object o) {
-        if (this == o) return true;
-        if (o == null || getClass() != o.getClass()) return false;
-
-        final RecipientId that = (RecipientId) o;
-
-        return id == that.id;
-    }
-
-    @Override
-    public int hashCode() {
-        return (int) (id ^ (id >>> 32));
-    }
 }
diff --git a/lib/src/main/java/org/asamk/signal/manager/storage/recipients/RecipientStore.java b/lib/src/main/java/org/asamk/signal/manager/storage/recipients/RecipientStore.java
index 16302692..f63e3b6c 100644
--- a/lib/src/main/java/org/asamk/signal/manager/storage/recipients/RecipientStore.java
+++ b/lib/src/main/java/org/asamk/signal/manager/storage/recipients/RecipientStore.java
@@ -453,7 +453,7 @@ public class RecipientStore implements RecipientResolver, ContactsStore, Profile
                                     .stream()
                                     .map(Enum::name)
                                     .collect(Collectors.toSet()));
-            return new Storage.Recipient(pair.getKey().getId(),
+            return new Storage.Recipient(pair.getKey().id(),
                     recipient.getAddress().getNumber().orElse(null),
                     recipient.getAddress().getUuid().map(UUID::toString).orElse(null),
                     recipient.getProfileKey() == null
@@ -479,115 +479,32 @@ public class RecipientStore implements RecipientResolver, ContactsStore, Profile
         }
     }
 
-    private static class Storage {
+    private record Storage(List<Recipient> recipients, long lastId) {
 
-        public List<Recipient> recipients;
+        private record Recipient(
+                long id,
+                String number,
+                String uuid,
+                String profileKey,
+                String profileKeyCredential,
+                Storage.Recipient.Contact contact,
+                Storage.Recipient.Profile profile
+        ) {
 
-        public long lastId;
+            private record Contact(
+                    String name, String color, int messageExpirationTime, boolean blocked, boolean archived
+            ) {}
 
-        // For deserialization
-        private Storage() {
-        }
-
-        public Storage(final List<Recipient> recipients, final long lastId) {
-            this.recipients = recipients;
-            this.lastId = lastId;
-        }
-
-        private static class Recipient {
-
-            public long id;
-            public String number;
-            public String uuid;
-            public String profileKey;
-            public String profileKeyCredential;
-            public Contact contact;
-            public Profile profile;
-
-            // For deserialization
-            private Recipient() {
-            }
-
-            public Recipient(
-                    final long id,
-                    final String number,
-                    final String uuid,
-                    final String profileKey,
-                    final String profileKeyCredential,
-                    final Contact contact,
-                    final Profile profile
-            ) {
-                this.id = id;
-                this.number = number;
-                this.uuid = uuid;
-                this.profileKey = profileKey;
-                this.profileKeyCredential = profileKeyCredential;
-                this.contact = contact;
-                this.profile = profile;
-            }
-
-            private static class Contact {
-
-                public String name;
-                public String color;
-                public int messageExpirationTime;
-                public boolean blocked;
-                public boolean archived;
-
-                // For deserialization
-                public Contact() {
-                }
-
-                public Contact(
-                        final String name,
-                        final String color,
-                        final int messageExpirationTime,
-                        final boolean blocked,
-                        final boolean archived
-                ) {
-                    this.name = name;
-                    this.color = color;
-                    this.messageExpirationTime = messageExpirationTime;
-                    this.blocked = blocked;
-                    this.archived = archived;
-                }
-            }
-
-            private static class Profile {
-
-                public long lastUpdateTimestamp;
-                public String givenName;
-                public String familyName;
-                public String about;
-                public String aboutEmoji;
-                public String avatarUrlPath;
-                public String unidentifiedAccessMode;
-                public Set<String> capabilities;
-
-                // For deserialization
-                private Profile() {
-                }
-
-                public Profile(
-                        final long lastUpdateTimestamp,
-                        final String givenName,
-                        final String familyName,
-                        final String about,
-                        final String aboutEmoji,
-                        final String avatarUrlPath,
-                        final String unidentifiedAccessMode,
-                        final Set<String> capabilities
-                ) {
-                    this.lastUpdateTimestamp = lastUpdateTimestamp;
-                    this.givenName = givenName;
-                    this.familyName = familyName;
-                    this.about = about;
-                    this.aboutEmoji = aboutEmoji;
-                    this.avatarUrlPath = avatarUrlPath;
-                    this.unidentifiedAccessMode = unidentifiedAccessMode;
-                    this.capabilities = capabilities;
-                }
-            }
+            private record Profile(
+                    long lastUpdateTimestamp,
+                    String givenName,
+                    String familyName,
+                    String about,
+                    String aboutEmoji,
+                    String avatarUrlPath,
+                    String unidentifiedAccessMode,
+                    Set<String> capabilities
+            ) {}
         }
     }
 
diff --git a/lib/src/main/java/org/asamk/signal/manager/storage/senderKeys/SenderKeyRecordStore.java b/lib/src/main/java/org/asamk/signal/manager/storage/senderKeys/SenderKeyRecordStore.java
index f0bbddc6..fb26fa00 100644
--- a/lib/src/main/java/org/asamk/signal/manager/storage/senderKeys/SenderKeyRecordStore.java
+++ b/lib/src/main/java/org/asamk/signal/manager/storage/senderKeys/SenderKeyRecordStore.java
@@ -103,7 +103,7 @@ public class SenderKeyRecordStore implements org.whispersystems.libsignal.groups
                     continue;
                 }
 
-                final var newKey = new Key(recipientId, key.getDeviceId(), key.distributionId);
+                final var newKey = new Key(recipientId, key.deviceId(), key.distributionId);
                 final var senderKeyRecord = loadSenderKeyLocked(newKey);
                 if (senderKeyRecord != null) {
                     continue;
@@ -126,7 +126,7 @@ public class SenderKeyRecordStore implements org.whispersystems.libsignal.groups
     }
 
     private List<Key> getKeysLocked(RecipientId recipientId) {
-        final var files = senderKeysPath.listFiles((_file, s) -> s.startsWith(recipientId.getId() + "_"));
+        final var files = senderKeysPath.listFiles((_file, s) -> s.startsWith(recipientId.id() + "_"));
         if (files == null) {
             return List.of();
         }
@@ -152,7 +152,7 @@ public class SenderKeyRecordStore implements org.whispersystems.libsignal.groups
             throw new AssertionError("Failed to create sender keys path", e);
         }
         return new File(senderKeysPath,
-                key.getRecipientId().getId() + "_" + key.getDeviceId() + "_" + key.distributionId.toString());
+                key.recipientId().id() + "_" + key.deviceId() + "_" + key.distributionId.toString());
     }
 
     private SenderKeyRecord loadSenderKeyLocked(final Key key) {
@@ -212,50 +212,7 @@ public class SenderKeyRecordStore implements org.whispersystems.libsignal.groups
         }
     }
 
-    private static final class Key {
+    private record Key(RecipientId recipientId, int deviceId, UUID distributionId) {
 
-        private final RecipientId recipientId;
-        private final int deviceId;
-        private final UUID distributionId;
-
-        public Key(
-                final RecipientId recipientId, final int deviceId, final UUID distributionId
-        ) {
-            this.recipientId = recipientId;
-            this.deviceId = deviceId;
-            this.distributionId = distributionId;
-        }
-
-        public RecipientId getRecipientId() {
-            return recipientId;
-        }
-
-        public int getDeviceId() {
-            return deviceId;
-        }
-
-        public UUID getDistributionId() {
-            return distributionId;
-        }
-
-        @Override
-        public boolean equals(final Object o) {
-            if (this == o) return true;
-            if (o == null || getClass() != o.getClass()) return false;
-
-            final Key key = (Key) o;
-
-            if (deviceId != key.deviceId) return false;
-            if (!recipientId.equals(key.recipientId)) return false;
-            return distributionId.equals(key.distributionId);
-        }
-
-        @Override
-        public int hashCode() {
-            int result = recipientId.hashCode();
-            result = 31 * result + deviceId;
-            result = 31 * result + distributionId.hashCode();
-            return result;
-        }
     }
 }
diff --git a/lib/src/main/java/org/asamk/signal/manager/storage/senderKeys/SenderKeySharedStore.java b/lib/src/main/java/org/asamk/signal/manager/storage/senderKeys/SenderKeySharedStore.java
index 3faf2e74..08197aec 100644
--- a/lib/src/main/java/org/asamk/signal/manager/storage/senderKeys/SenderKeySharedStore.java
+++ b/lib/src/main/java/org/asamk/signal/manager/storage/senderKeys/SenderKeySharedStore.java
@@ -87,8 +87,8 @@ public class SenderKeySharedStore {
         synchronized (sharedSenderKeys) {
             return sharedSenderKeys.get(distributionId)
                     .stream()
-                    .map(k -> new SignalProtocolAddress(addressResolver.resolveRecipientAddress(k.getRecipientId())
-                            .getIdentifier(), k.getDeviceId()))
+                    .map(k -> new SignalProtocolAddress(addressResolver.resolveRecipientAddress(k.recipientId())
+                            .getIdentifier(), k.deviceId()))
                     .collect(Collectors.toSet());
         }
     }
@@ -146,7 +146,7 @@ public class SenderKeySharedStore {
 
                 sharedSenderKeys.put(distributionId, new HashSet<>(entries) {
                     {
-                        entries.removeIf(e -> e.getRecipientId().equals(recipientId));
+                        removeIf(e -> e.recipientId().equals(recipientId));
                     }
                 });
             }
@@ -163,7 +163,7 @@ public class SenderKeySharedStore {
                         entries.stream()
                                 .map(e -> e.recipientId.equals(toBeMergedRecipientId) ? new SenderKeySharedEntry(
                                         recipientId,
-                                        e.getDeviceId()) : e)
+                                        e.deviceId()) : e)
                                 .collect(Collectors.toSet()));
             }
             saveLocked();
@@ -181,8 +181,8 @@ public class SenderKeySharedStore {
         var storage = new Storage(sharedSenderKeys.entrySet().stream().flatMap(pair -> {
             final var sharedWith = pair.getValue();
             return sharedWith.stream()
-                    .map(entry -> new Storage.SharedSenderKey(entry.getRecipientId().getId(),
-                            entry.getDeviceId(),
+                    .map(entry -> new Storage.SharedSenderKey(entry.recipientId().id(),
+                            entry.deviceId(),
                             pair.getKey().asUuid().toString()));
         }).collect(Collectors.toList()));
 
@@ -199,72 +199,10 @@ public class SenderKeySharedStore {
         }
     }
 
-    private static class Storage {
+    private record Storage(List<SharedSenderKey> sharedSenderKeys) {
 
-        public List<SharedSenderKey> sharedSenderKeys;
-
-        // For deserialization
-        private Storage() {
-        }
-
-        public Storage(final List<SharedSenderKey> sharedSenderKeys) {
-            this.sharedSenderKeys = sharedSenderKeys;
-        }
-
-        private static class SharedSenderKey {
-
-            public long recipientId;
-            public int deviceId;
-            public String distributionId;
-
-            // For deserialization
-            private SharedSenderKey() {
-            }
-
-            public SharedSenderKey(final long recipientId, final int deviceId, final String distributionId) {
-                this.recipientId = recipientId;
-                this.deviceId = deviceId;
-                this.distributionId = distributionId;
-            }
-        }
+        private record SharedSenderKey(long recipientId, int deviceId, String distributionId) {}
     }
 
-    private static final class SenderKeySharedEntry {
-
-        private final RecipientId recipientId;
-        private final int deviceId;
-
-        public SenderKeySharedEntry(
-                final RecipientId recipientId, final int deviceId
-        ) {
-            this.recipientId = recipientId;
-            this.deviceId = deviceId;
-        }
-
-        public RecipientId getRecipientId() {
-            return recipientId;
-        }
-
-        public int getDeviceId() {
-            return deviceId;
-        }
-
-        @Override
-        public boolean equals(final Object o) {
-            if (this == o) return true;
-            if (o == null || getClass() != o.getClass()) return false;
-
-            final SenderKeySharedEntry that = (SenderKeySharedEntry) o;
-
-            if (deviceId != that.deviceId) return false;
-            return recipientId.equals(that.recipientId);
-        }
-
-        @Override
-        public int hashCode() {
-            int result = recipientId.hashCode();
-            result = 31 * result + deviceId;
-            return result;
-        }
-    }
+    private record SenderKeySharedEntry(RecipientId recipientId, int deviceId) {}
 }
diff --git a/lib/src/main/java/org/asamk/signal/manager/storage/sessions/SessionStore.java b/lib/src/main/java/org/asamk/signal/manager/storage/sessions/SessionStore.java
index bae4fdf3..627ef45e 100644
--- a/lib/src/main/java/org/asamk/signal/manager/storage/sessions/SessionStore.java
+++ b/lib/src/main/java/org/asamk/signal/manager/storage/sessions/SessionStore.java
@@ -88,8 +88,8 @@ public class SessionStore implements SignalServiceSessionStore {
         synchronized (cachedSessions) {
             return getKeysLocked(recipientId).stream()
                     // get all sessions for recipient except main device session
-                    .filter(key -> key.getDeviceId() != 1 && key.getRecipientId().equals(recipientId))
-                    .map(Key::getDeviceId)
+                    .filter(key -> key.deviceId() != 1 && key.recipientId().equals(recipientId))
+                    .map(Key::deviceId)
                     .collect(Collectors.toList());
         }
     }
@@ -155,7 +155,7 @@ public class SessionStore implements SignalServiceSessionStore {
                     .stream()
                     .flatMap(recipientId -> getKeysLocked(recipientId).stream())
                     .filter(key -> isActive(this.loadSessionLocked(key)))
-                    .map(key -> new SignalProtocolAddress(recipientIdToNameMap.get(key.recipientId), key.getDeviceId()))
+                    .map(key -> new SignalProtocolAddress(recipientIdToNameMap.get(key.recipientId), key.deviceId()))
                     .collect(Collectors.toSet());
         }
     }
@@ -197,7 +197,7 @@ public class SessionStore implements SignalServiceSessionStore {
                     if (session == null) {
                         continue;
                     }
-                    final var newKey = new Key(recipientId, key.getDeviceId());
+                    final var newKey = new Key(recipientId, key.deviceId());
                     storeSessionLocked(newKey, session);
                 }
             }
@@ -217,7 +217,7 @@ public class SessionStore implements SignalServiceSessionStore {
     }
 
     private List<Key> getKeysLocked(RecipientId recipientId) {
-        final var files = sessionsPath.listFiles((_file, s) -> s.startsWith(recipientId.getId() + "_"));
+        final var files = sessionsPath.listFiles((_file, s) -> s.startsWith(recipientId.id() + "_"));
         if (files == null) {
             return List.of();
         }
@@ -249,7 +249,7 @@ public class SessionStore implements SignalServiceSessionStore {
         } catch (IOException e) {
             throw new AssertionError("Failed to create sessions path", e);
         }
-        return new File(sessionsPath, key.getRecipientId().getId() + "_" + key.getDeviceId());
+        return new File(sessionsPath, key.recipientId().id() + "_" + key.deviceId());
     }
 
     private SessionRecord loadSessionLocked(final Key key) {
@@ -324,40 +324,5 @@ public class SessionStore implements SignalServiceSessionStore {
                 && record.getSessionVersion() == CiphertextMessage.CURRENT_VERSION;
     }
 
-    private static final class Key {
-
-        private final RecipientId recipientId;
-        private final int deviceId;
-
-        public Key(final RecipientId recipientId, final int deviceId) {
-            this.recipientId = recipientId;
-            this.deviceId = deviceId;
-        }
-
-        public RecipientId getRecipientId() {
-            return recipientId;
-        }
-
-        public int getDeviceId() {
-            return deviceId;
-        }
-
-        @Override
-        public boolean equals(final Object o) {
-            if (this == o) return true;
-            if (o == null || getClass() != o.getClass()) return false;
-
-            final var key = (Key) o;
-
-            if (deviceId != key.deviceId) return false;
-            return recipientId.equals(key.recipientId);
-        }
-
-        @Override
-        public int hashCode() {
-            int result = recipientId.hashCode();
-            result = 31 * result + deviceId;
-            return result;
-        }
-    }
+    private record Key(RecipientId recipientId, int deviceId) {}
 }
diff --git a/lib/src/main/java/org/asamk/signal/manager/storage/stickers/StickerStore.java b/lib/src/main/java/org/asamk/signal/manager/storage/stickers/StickerStore.java
index 19803bdc..d0c9c5bc 100644
--- a/lib/src/main/java/org/asamk/signal/manager/storage/stickers/StickerStore.java
+++ b/lib/src/main/java/org/asamk/signal/manager/storage/stickers/StickerStore.java
@@ -65,33 +65,10 @@ public class StickerStore {
                 .collect(Collectors.toList()));
     }
 
-    public static class Storage {
+    public record Storage(List<Storage.Sticker> stickers) {
 
-        public List<Storage.Sticker> stickers;
+        private record Sticker(String packId, String packKey, boolean installed) {
 
-        // For deserialization
-        private Storage() {
-        }
-
-        public Storage(final List<Sticker> stickers) {
-            this.stickers = stickers;
-        }
-
-        private static class Sticker {
-
-            public String packId;
-            public String packKey;
-            public boolean installed;
-
-            // For deserialization
-            private Sticker() {
-            }
-
-            public Sticker(final String packId, final String packKey, final boolean installed) {
-                this.packId = packId;
-                this.packKey = packKey;
-                this.installed = installed;
-            }
         }
     }
 
diff --git a/lib/src/main/java/org/asamk/signal/manager/util/StickerUtils.java b/lib/src/main/java/org/asamk/signal/manager/util/StickerUtils.java
index 4c7fd58e..f332bbb8 100644
--- a/lib/src/main/java/org/asamk/signal/manager/util/StickerUtils.java
+++ b/lib/src/main/java/org/asamk/signal/manager/util/StickerUtils.java
@@ -35,60 +35,59 @@ public class StickerUtils {
 
         var pack = parseStickerPack(rootPath, zip);
 
-        if (pack.stickers == null) {
+        if (pack.stickers() == null) {
             throw new StickerPackInvalidException("Must set a 'stickers' field.");
         }
 
-        if (pack.stickers.isEmpty()) {
+        if (pack.stickers().isEmpty()) {
             throw new StickerPackInvalidException("Must include stickers.");
         }
 
-        var stickers = new ArrayList<SignalServiceStickerManifestUpload.StickerInfo>(pack.stickers.size());
-        for (var sticker : pack.stickers) {
-            if (sticker.file == null) {
+        var stickers = new ArrayList<SignalServiceStickerManifestUpload.StickerInfo>(pack.stickers().size());
+        for (var sticker : pack.stickers()) {
+            if (sticker.file() == null) {
                 throw new StickerPackInvalidException("Must set a 'file' field on each sticker.");
             }
 
             Pair<InputStream, Long> data;
             try {
-                data = getInputStreamAndLength(rootPath, zip, sticker.file);
+                data = getInputStreamAndLength(rootPath, zip, sticker.file());
             } catch (IOException ignored) {
-                throw new StickerPackInvalidException("Could not find find " + sticker.file);
+                throw new StickerPackInvalidException("Could not find find " + sticker.file());
             }
 
-            var contentType = sticker.contentType != null && !sticker.contentType.isEmpty()
-                    ? sticker.contentType
-                    : getContentType(rootPath, zip, sticker.file);
+            var contentType = sticker.contentType() != null && !sticker.contentType().isEmpty()
+                    ? sticker.contentType()
+                    : getContentType(rootPath, zip, sticker.file());
             var stickerInfo = new SignalServiceStickerManifestUpload.StickerInfo(data.first(),
                     data.second(),
-                    Optional.fromNullable(sticker.emoji).or(""),
+                    Optional.fromNullable(sticker.emoji()).or(""),
                     contentType);
             stickers.add(stickerInfo);
         }
 
         SignalServiceStickerManifestUpload.StickerInfo cover = null;
-        if (pack.cover != null) {
-            if (pack.cover.file == null) {
+        if (pack.cover() != null) {
+            if (pack.cover().file() == null) {
                 throw new StickerPackInvalidException("Must set a 'file' field on the cover.");
             }
 
             Pair<InputStream, Long> data;
             try {
-                data = getInputStreamAndLength(rootPath, zip, pack.cover.file);
+                data = getInputStreamAndLength(rootPath, zip, pack.cover().file());
             } catch (IOException ignored) {
-                throw new StickerPackInvalidException("Could not find find " + pack.cover.file);
+                throw new StickerPackInvalidException("Could not find find " + pack.cover().file());
             }
 
-            var contentType = pack.cover.contentType != null && !pack.cover.contentType.isEmpty()
-                    ? pack.cover.contentType
-                    : getContentType(rootPath, zip, pack.cover.file);
+            var contentType = pack.cover().contentType() != null && !pack.cover().contentType().isEmpty() ? pack.cover()
+                    .contentType() : getContentType(rootPath, zip, pack.cover().file());
             cover = new SignalServiceStickerManifestUpload.StickerInfo(data.first(),
                     data.second(),
-                    Optional.fromNullable(pack.cover.emoji).or(""),
+                    Optional.fromNullable(pack.cover().emoji()).or(""),
                     contentType);
         }
 
-        return new SignalServiceStickerManifestUpload(pack.title, pack.author, cover, stickers);
+        return new SignalServiceStickerManifestUpload(pack.title(), pack.author(), cover, stickers);
     }
 
     private static JsonStickerPack parseStickerPack(String rootPath, ZipFile zip) throws IOException {
diff --git a/src/main/java/org/asamk/signal/JsonReceiveMessageHandler.java b/src/main/java/org/asamk/signal/JsonReceiveMessageHandler.java
index 73c88947..96f4acb5 100644
--- a/src/main/java/org/asamk/signal/JsonReceiveMessageHandler.java
+++ b/src/main/java/org/asamk/signal/JsonReceiveMessageHandler.java
@@ -26,11 +26,11 @@ public class JsonReceiveMessageHandler implements Manager.ReceiveMessageHandler
     public void handleMessage(SignalServiceEnvelope envelope, SignalServiceContent content, Throwable exception) {
         final var object = new HashMap<String, Object>();
         if (exception != null) {
-            object.put("error", new JsonError(exception));
+            object.put("error", JsonError.from(exception));
         }
 
         if (envelope != null) {
-            object.put("envelope", new JsonMessageEnvelope(envelope, content, exception, m));
+            object.put("envelope", JsonMessageEnvelope.from(envelope, content, exception, m));
         }
 
         jsonWriter.write(object);
diff --git a/src/main/java/org/asamk/signal/ReceiveMessageHandler.java b/src/main/java/org/asamk/signal/ReceiveMessageHandler.java
index d86ab26c..200466ae 100644
--- a/src/main/java/org/asamk/signal/ReceiveMessageHandler.java
+++ b/src/main/java/org/asamk/signal/ReceiveMessageHandler.java
@@ -643,7 +643,7 @@ public class ReceiveMessageHandler implements Manager.ReceiveMessageHandler {
 
         var group = m.getGroup(groupId);
         if (group != null) {
-            writer.println("Name: {}", group.getTitle());
+            writer.println("Name: {}", group.title());
         } else {
             writer.println("Name: <Unknown group>");
         }
diff --git a/src/main/java/org/asamk/signal/commands/GetUserStatusCommand.java b/src/main/java/org/asamk/signal/commands/GetUserStatusCommand.java
index e5685f1a..b32d6633 100644
--- a/src/main/java/org/asamk/signal/commands/GetUserStatusCommand.java
+++ b/src/main/java/org/asamk/signal/commands/GetUserStatusCommand.java
@@ -66,21 +66,5 @@ public class GetUserStatusCommand implements JsonRpcLocalCommand {
         }
     }
 
-    private static final class JsonUserStatus {
-
-        public final String recipient;
-
-        public final String number;
-
-        public final String uuid;
-
-        public final boolean isRegistered;
-
-        public JsonUserStatus(String recipient, String number, String uuid, boolean isRegistered) {
-            this.recipient = recipient;
-            this.number = number;
-            this.uuid = uuid;
-            this.isRegistered = isRegistered;
-        }
-    }
+    private record JsonUserStatus(String recipient, String number, String uuid, boolean isRegistered) {}
 }
diff --git a/src/main/java/org/asamk/signal/commands/JoinGroupCommand.java b/src/main/java/org/asamk/signal/commands/JoinGroupCommand.java
index 892879f6..5501c5d6 100644
--- a/src/main/java/org/asamk/signal/commands/JoinGroupCommand.java
+++ b/src/main/java/org/asamk/signal/commands/JoinGroupCommand.java
@@ -69,7 +69,7 @@ public class JoinGroupCommand implements JsonRpcLocalCommand {
                     writer.println("Joined group \"{}\"", newGroupId.toBase64());
                 }
             }
-            handleSendMessageResults(results.second().getResults());
+            handleSendMessageResults(results.second().results());
         } catch (GroupPatchNotAcceptedException e) {
             throw new UserErrorException("Failed to join group, maybe already a member");
         } catch (IOException e) {
diff --git a/src/main/java/org/asamk/signal/commands/JsonRpcLocalCommand.java b/src/main/java/org/asamk/signal/commands/JsonRpcLocalCommand.java
index 47229538..ccf32771 100644
--- a/src/main/java/org/asamk/signal/commands/JsonRpcLocalCommand.java
+++ b/src/main/java/org/asamk/signal/commands/JsonRpcLocalCommand.java
@@ -16,8 +16,7 @@ import java.util.Map;
 public interface JsonRpcLocalCommand extends JsonRpcCommand<Map<String, Object>>, LocalCommand {
 
     default TypeReference<Map<String, Object>> getRequestType() {
-        return new TypeReference<>() {
-        };
+        return new TypeReference<>() {};
     }
 
     default void handleCommand(
diff --git a/src/main/java/org/asamk/signal/commands/ListContactsCommand.java b/src/main/java/org/asamk/signal/commands/ListContactsCommand.java
index 2d0f6322..b87cba7e 100644
--- a/src/main/java/org/asamk/signal/commands/ListContactsCommand.java
+++ b/src/main/java/org/asamk/signal/commands/ListContactsCommand.java
@@ -54,26 +54,5 @@ public class ListContactsCommand implements JsonRpcLocalCommand {
         }
     }
 
-    private static final class JsonContact {
-
-        public final String number;
-        public final String uuid;
-        public final String name;
-        public final boolean isBlocked;
-        public final int messageExpirationTime;
-
-        private JsonContact(
-                final String number,
-                final String uuid,
-                final String name,
-                final boolean isBlocked,
-                final int messageExpirationTime
-        ) {
-            this.number = number;
-            this.uuid = uuid;
-            this.name = name;
-            this.isBlocked = isBlocked;
-            this.messageExpirationTime = messageExpirationTime;
-        }
-    }
+    private record JsonContact(String number, String uuid, String name, boolean isBlocked, int messageExpirationTime) {}
 }
diff --git a/src/main/java/org/asamk/signal/commands/ListDevicesCommand.java b/src/main/java/org/asamk/signal/commands/ListDevicesCommand.java
index d9a5ea33..6db929b0 100644
--- a/src/main/java/org/asamk/signal/commands/ListDevicesCommand.java
+++ b/src/main/java/org/asamk/signal/commands/ListDevicesCommand.java
@@ -45,36 +45,21 @@ public class ListDevicesCommand implements JsonRpcLocalCommand {
 
         if (outputWriter instanceof PlainTextWriter writer) {
             for (var d : devices) {
-                writer.println("- Device {}{}:", d.getId(), (d.isThisDevice() ? " (this device)" : ""));
+                writer.println("- Device {}{}:", d.id(), (d.isThisDevice() ? " (this device)" : ""));
                 writer.indent(w -> {
-                    w.println("Name: {}", d.getName());
-                    w.println("Created: {}", DateUtils.formatTimestamp(d.getCreated()));
-                    w.println("Last seen: {}", DateUtils.formatTimestamp(d.getLastSeen()));
+                    w.println("Name: {}", d.name());
+                    w.println("Created: {}", DateUtils.formatTimestamp(d.created()));
+                    w.println("Last seen: {}", DateUtils.formatTimestamp(d.lastSeen()));
                 });
             }
         } else {
             final var writer = (JsonWriter) outputWriter;
             final var jsonDevices = devices.stream()
-                    .map(d -> new JsonDevice(d.getId(), d.getName(), d.getCreated(), d.getLastSeen()))
+                    .map(d -> new JsonDevice(d.id(), d.name(), d.created(), d.lastSeen()))
                     .collect(Collectors.toList());
             writer.write(jsonDevices);
         }
     }
 
-    private static final class JsonDevice {
-
-        public final long id;
-        public final String name;
-        public final long createdTimestamp;
-        public final long lastSeenTimestamp;
-
-        private JsonDevice(
-                final long id, final String name, final long createdTimestamp, final long lastSeenTimestamp
-        ) {
-            this.id = id;
-            this.name = name;
-            this.createdTimestamp = createdTimestamp;
-            this.lastSeenTimestamp = lastSeenTimestamp;
-        }
-    }
+    private record JsonDevice(long id, String name, long createdTimestamp, long lastSeenTimestamp) {}
 }
diff --git a/src/main/java/org/asamk/signal/commands/ListGroupsCommand.java b/src/main/java/org/asamk/signal/commands/ListGroupsCommand.java
index 3321c34b..ef5fd452 100644
--- a/src/main/java/org/asamk/signal/commands/ListGroupsCommand.java
+++ b/src/main/java/org/asamk/signal/commands/ListGroupsCommand.java
@@ -50,25 +50,25 @@ public class ListGroupsCommand implements JsonRpcLocalCommand {
             PlainTextWriter writer, Group group, boolean detailed
     ) {
         if (detailed) {
-            final var groupInviteLink = group.getGroupInviteLinkUrl();
+            final var groupInviteLink = group.groupInviteLinkUrl();
 
             writer.println(
                     "Id: {} Name: {} Description: {} Active: {} Blocked: {} Members: {} Pending members: {} Requesting members: {} Admins: {} Message expiration: {} Link: {}",
-                    group.getGroupId().toBase64(),
-                    group.getTitle(),
-                    group.getDescription(),
+                    group.groupId().toBase64(),
+                    group.title(),
+                    group.description(),
                     group.isMember(),
                     group.isBlocked(),
-                    resolveMembers(group.getMembers()),
-                    resolveMembers(group.getPendingMembers()),
-                    resolveMembers(group.getRequestingMembers()),
-                    resolveMembers(group.getAdminMembers()),
-                    group.getMessageExpirationTimer() == 0 ? "disabled" : group.getMessageExpirationTimer() + "s",
+                    resolveMembers(group.members()),
+                    resolveMembers(group.pendingMembers()),
+                    resolveMembers(group.requestingMembers()),
+                    resolveMembers(group.adminMembers()),
+                    group.messageExpirationTimer() == 0 ? "disabled" : group.messageExpirationTimer() + "s",
                     groupInviteLink == null ? '-' : groupInviteLink.getUrl());
         } else {
             writer.println("Id: {} Name: {}  Active: {} Blocked: {}",
-                    group.getGroupId().toBase64(),
-                    group.getTitle(),
+                    group.groupId().toBase64(),
+                    group.title(),
                     group.isMember(),
                     group.isBlocked());
         }
@@ -83,21 +83,21 @@ public class ListGroupsCommand implements JsonRpcLocalCommand {
         if (outputWriter instanceof JsonWriter jsonWriter) {
 
             var jsonGroups = groups.stream().map(group -> {
-                final var groupInviteLink = group.getGroupInviteLinkUrl();
+                final var groupInviteLink = group.groupInviteLinkUrl();
 
-                return new JsonGroup(group.getGroupId().toBase64(),
-                        group.getTitle(),
-                        group.getDescription(),
+                return new JsonGroup(group.groupId().toBase64(),
+                        group.title(),
+                        group.description(),
                         group.isMember(),
                         group.isBlocked(),
-                        group.getMessageExpirationTimer(),
-                        resolveJsonMembers(group.getMembers()),
-                        resolveJsonMembers(group.getPendingMembers()),
-                        resolveJsonMembers(group.getRequestingMembers()),
-                        resolveJsonMembers(group.getAdminMembers()),
-                        group.getPermissionAddMember().name(),
-                        group.getPermissionEditDetails().name(),
-                        group.getPermissionSendMessage().name(),
+                        group.messageExpirationTimer(),
+                        resolveJsonMembers(group.members()),
+                        resolveJsonMembers(group.pendingMembers()),
+                        resolveJsonMembers(group.requestingMembers()),
+                        resolveJsonMembers(group.adminMembers()),
+                        group.permissionAddMember().name(),
+                        group.permissionEditDetails().name(),
+                        group.permissionSendMessage().name(),
                         groupInviteLink == null ? null : groupInviteLink.getUrl());
             }).collect(Collectors.toList());
 
@@ -111,66 +111,22 @@ public class ListGroupsCommand implements JsonRpcLocalCommand {
         }
     }
 
-    private static final class JsonGroup {
+    private record JsonGroup(
+            String id,
+            String name,
+            String description,
+            boolean isMember,
+            boolean isBlocked,
+            int messageExpirationTime,
+            Set<JsonGroupMember> members,
+            Set<JsonGroupMember> pendingMembers,
+            Set<JsonGroupMember> requestingMembers,
+            Set<JsonGroupMember> admins,
+            String permissionAddMember,
+            String permissionEditDetails,
+            String permissionSendMessage,
+            String groupInviteLink
+    ) {}
 
-        public final String id;
-        public final String name;
-        public final String description;
-        public final boolean isMember;
-        public final boolean isBlocked;
-        public final int messageExpirationTime;
-
-        public final Set<JsonGroupMember> members;
-        public final Set<JsonGroupMember> pendingMembers;
-        public final Set<JsonGroupMember> requestingMembers;
-        public final Set<JsonGroupMember> admins;
-        public final String permissionAddMember;
-        public final String permissionEditDetails;
-        public final String permissionSendMessage;
-        public final String groupInviteLink;
-
-        public JsonGroup(
-                String id,
-                String name,
-                String description,
-                boolean isMember,
-                boolean isBlocked,
-                final int messageExpirationTime,
-                Set<JsonGroupMember> members,
-                Set<JsonGroupMember> pendingMembers,
-                Set<JsonGroupMember> requestingMembers,
-                Set<JsonGroupMember> admins,
-                final String permissionAddMember,
-                final String permissionEditDetails,
-                final String permissionSendMessage,
-                String groupInviteLink
-        ) {
-            this.id = id;
-            this.name = name;
-            this.description = description;
-            this.isMember = isMember;
-            this.isBlocked = isBlocked;
-            this.messageExpirationTime = messageExpirationTime;
-
-            this.members = members;
-            this.pendingMembers = pendingMembers;
-            this.requestingMembers = requestingMembers;
-            this.admins = admins;
-            this.permissionAddMember = permissionAddMember;
-            this.permissionEditDetails = permissionEditDetails;
-            this.permissionSendMessage = permissionSendMessage;
-            this.groupInviteLink = groupInviteLink;
-        }
-    }
-
-    private static final class JsonGroupMember {
-
-        public final String number;
-        public final String uuid;
-
-        private JsonGroupMember(final String number, final String uuid) {
-            this.number = number;
-            this.uuid = uuid;
-        }
-    }
+    private record JsonGroupMember(String number, String uuid) {}
 }
diff --git a/src/main/java/org/asamk/signal/commands/ListIdentitiesCommand.java b/src/main/java/org/asamk/signal/commands/ListIdentitiesCommand.java
index d7646ebb..6f6fac2f 100644
--- a/src/main/java/org/asamk/signal/commands/ListIdentitiesCommand.java
+++ b/src/main/java/org/asamk/signal/commands/ListIdentitiesCommand.java
@@ -30,12 +30,12 @@ public class ListIdentitiesCommand implements JsonRpcLocalCommand {
     }
 
     private static void printIdentityFingerprint(PlainTextWriter writer, Manager m, Identity theirId) {
-        final SignalServiceAddress address = theirId.getRecipient().toSignalServiceAddress();
-        var digits = Util.formatSafetyNumber(theirId.getSafetyNumber());
+        final SignalServiceAddress address = theirId.recipient().toSignalServiceAddress();
+        var digits = Util.formatSafetyNumber(theirId.safetyNumber());
         writer.println("{}: {} Added: {} Fingerprint: {} Safety Number: {}",
                 address.getNumber().orNull(),
-                theirId.getTrustLevel(),
-                theirId.getDateAdded(),
+                theirId.trustLevel(),
+                theirId.dateAdded(),
                 Hex.toString(theirId.getFingerprint()),
                 digits);
     }
@@ -66,9 +66,9 @@ public class ListIdentitiesCommand implements JsonRpcLocalCommand {
         } else {
             final var writer = (JsonWriter) outputWriter;
             final var jsonIdentities = identities.stream().map(id -> {
-                final var address = id.getRecipient().toSignalServiceAddress();
-                var safetyNumber = Util.formatSafetyNumber(id.getSafetyNumber());
-                var scannableSafetyNumber = id.getScannableSafetyNumber();
+                final var address = id.recipient().toSignalServiceAddress();
+                var safetyNumber = Util.formatSafetyNumber(id.safetyNumber());
+                var scannableSafetyNumber = id.scannableSafetyNumber();
                 return new JsonIdentity(address.getNumber().orNull(),
                         address.getUuid().toString(),
                         Hex.toString(id.getFingerprint()),
@@ -76,40 +76,21 @@ public class ListIdentitiesCommand implements JsonRpcLocalCommand {
                         scannableSafetyNumber == null
                                 ? null
                                 : Base64.getEncoder().encodeToString(scannableSafetyNumber),
-                        id.getTrustLevel().name(),
-                        id.getDateAdded().getTime());
+                        id.trustLevel().name(),
+                        id.dateAdded().getTime());
             }).collect(Collectors.toList());
 
             writer.write(jsonIdentities);
         }
     }
 
-    private static final class JsonIdentity {
-
-        public final String number;
-        public final String uuid;
-        public final String fingerprint;
-        public final String safetyNumber;
-        public final String scannableSafetyNumber;
-        public final String trustLevel;
-        public final long addedTimestamp;
-
-        private JsonIdentity(
-                final String number,
-                final String uuid,
-                final String fingerprint,
-                final String safetyNumber,
-                final String scannableSafetyNumber,
-                final String trustLevel,
-                final long addedTimestamp
-        ) {
-            this.number = number;
-            this.uuid = uuid;
-            this.fingerprint = fingerprint;
-            this.safetyNumber = safetyNumber;
-            this.scannableSafetyNumber = scannableSafetyNumber;
-            this.trustLevel = trustLevel;
-            this.addedTimestamp = addedTimestamp;
-        }
-    }
+    private record JsonIdentity(
+            String number,
+            String uuid,
+            String fingerprint,
+            String safetyNumber,
+            String scannableSafetyNumber,
+            String trustLevel,
+            long addedTimestamp
+    ) {}
 }
diff --git a/src/main/java/org/asamk/signal/commands/QuitGroupCommand.java b/src/main/java/org/asamk/signal/commands/QuitGroupCommand.java
index 8c3ac3bd..25647e4e 100644
--- a/src/main/java/org/asamk/signal/commands/QuitGroupCommand.java
+++ b/src/main/java/org/asamk/signal/commands/QuitGroupCommand.java
@@ -55,9 +55,9 @@ public class QuitGroupCommand implements JsonRpcLocalCommand {
         try {
             try {
                 final var results = m.quitGroup(groupId, groupAdmins);
-                final var timestamp = results.getTimestamp();
+                final var timestamp = results.timestamp();
                 outputResult(outputWriter, timestamp);
-                handleSendMessageResults(results.getResults());
+                handleSendMessageResults(results.results());
             } catch (NotAGroupMemberException e) {
                 logger.info("User is not a group member");
             }
diff --git a/src/main/java/org/asamk/signal/commands/ReceiveCommand.java b/src/main/java/org/asamk/signal/commands/ReceiveCommand.java
index e1a9a2f3..fe062ffc 100644
--- a/src/main/java/org/asamk/signal/commands/ReceiveCommand.java
+++ b/src/main/java/org/asamk/signal/commands/ReceiveCommand.java
@@ -61,19 +61,19 @@ public class ReceiveCommand implements ExtendedDbusCommand, LocalCommand {
             if (outputWriter instanceof JsonWriter jsonWriter) {
 
                 dbusconnection.addSigHandler(Signal.MessageReceived.class, signal, messageReceived -> {
-                    var envelope = new JsonMessageEnvelope(messageReceived);
+                    var envelope = JsonMessageEnvelope.from(messageReceived);
                     final var object = Map.of("envelope", envelope);
                     jsonWriter.write(object);
                 });
 
                 dbusconnection.addSigHandler(Signal.ReceiptReceived.class, signal, receiptReceived -> {
-                    var envelope = new JsonMessageEnvelope(receiptReceived);
+                    var envelope = JsonMessageEnvelope.from(receiptReceived);
                     final var object = Map.of("envelope", envelope);
                     jsonWriter.write(object);
                 });
 
                 dbusconnection.addSigHandler(Signal.SyncMessageReceived.class, signal, syncReceived -> {
-                    var envelope = new JsonMessageEnvelope(syncReceived);
+                    var envelope = JsonMessageEnvelope.from(syncReceived);
                     final var object = Map.of("envelope", envelope);
                     jsonWriter.write(object);
                 });
diff --git a/src/main/java/org/asamk/signal/commands/RemoteDeleteCommand.java b/src/main/java/org/asamk/signal/commands/RemoteDeleteCommand.java
index 1204963c..2b9ebe91 100644
--- a/src/main/java/org/asamk/signal/commands/RemoteDeleteCommand.java
+++ b/src/main/java/org/asamk/signal/commands/RemoteDeleteCommand.java
@@ -56,8 +56,8 @@ public class RemoteDeleteCommand implements JsonRpcLocalCommand {
 
         try {
             final var results = m.sendRemoteDeleteMessage(targetTimestamp, recipientIdentifiers);
-            outputResult(outputWriter, results.getTimestamp());
-            ErrorUtils.handleSendMessageResults(results.getResults());
+            outputResult(outputWriter, results.timestamp());
+            ErrorUtils.handleSendMessageResults(results.results());
         } catch (GroupNotFoundException | NotAGroupMemberException | GroupSendingNotAllowedException e) {
             throw new UserErrorException(e.getMessage());
         } catch (IOException e) {
diff --git a/src/main/java/org/asamk/signal/commands/SendCommand.java b/src/main/java/org/asamk/signal/commands/SendCommand.java
index ab8bce16..e22d307b 100644
--- a/src/main/java/org/asamk/signal/commands/SendCommand.java
+++ b/src/main/java/org/asamk/signal/commands/SendCommand.java
@@ -102,8 +102,8 @@ public class SendCommand implements JsonRpcLocalCommand {
 
         try {
             var results = m.sendMessage(new Message(messageText, attachments), recipientIdentifiers);
-            outputResult(outputWriter, results.getTimestamp());
-            ErrorUtils.handleSendMessageResults(results.getResults());
+            outputResult(outputWriter, results.timestamp());
+            ErrorUtils.handleSendMessageResults(results.results());
         } catch (AttachmentInvalidException | IOException e) {
             throw new UnexpectedErrorException("Failed to send message: " + e.getMessage() + " (" + e.getClass()
                     .getSimpleName() + ")", e);
diff --git a/src/main/java/org/asamk/signal/commands/SendReactionCommand.java b/src/main/java/org/asamk/signal/commands/SendReactionCommand.java
index 62d040a3..3992dc55 100644
--- a/src/main/java/org/asamk/signal/commands/SendReactionCommand.java
+++ b/src/main/java/org/asamk/signal/commands/SendReactionCommand.java
@@ -72,8 +72,8 @@ public class SendReactionCommand implements JsonRpcLocalCommand {
                     CommandUtil.getSingleRecipientIdentifier(targetAuthor, m.getSelfNumber()),
                     targetTimestamp,
                     recipientIdentifiers);
-            outputResult(outputWriter, results.getTimestamp());
-            ErrorUtils.handleSendMessageResults(results.getResults());
+            outputResult(outputWriter, results.timestamp());
+            ErrorUtils.handleSendMessageResults(results.results());
         } catch (GroupNotFoundException | NotAGroupMemberException | GroupSendingNotAllowedException e) {
             throw new UserErrorException(e.getMessage());
         } catch (IOException e) {
diff --git a/src/main/java/org/asamk/signal/commands/UpdateGroupCommand.java b/src/main/java/org/asamk/signal/commands/UpdateGroupCommand.java
index c51df8e0..20e70278 100644
--- a/src/main/java/org/asamk/signal/commands/UpdateGroupCommand.java
+++ b/src/main/java/org/asamk/signal/commands/UpdateGroupCommand.java
@@ -127,8 +127,8 @@ public class UpdateGroupCommand implements JsonRpcLocalCommand {
                 var results = m.createGroup(groupName,
                         groupMembers,
                         groupAvatar == null ? null : new File(groupAvatar));
-                timestamp = results.second().getTimestamp();
-                ErrorUtils.handleSendMessageResults(results.second().getResults());
+                timestamp = results.second().timestamp();
+                ErrorUtils.handleSendMessageResults(results.second().results());
                 groupId = results.first();
                 groupName = null;
                 groupMembers = null;
@@ -154,8 +154,8 @@ public class UpdateGroupCommand implements JsonRpcLocalCommand {
                                     : groupSendMessagesPermission == GroupPermission.ONLY_ADMINS)
                             .build());
             if (results != null) {
-                timestamp = results.getTimestamp();
-                ErrorUtils.handleSendMessageResults(results.getResults());
+                timestamp = results.timestamp();
+                ErrorUtils.handleSendMessageResults(results.results());
             }
             outputResult(outputWriter, timestamp, isNewGroup ? groupId : null);
         } catch (AttachmentInvalidException e) {
diff --git a/src/main/java/org/asamk/signal/dbus/DbusManagerImpl.java b/src/main/java/org/asamk/signal/dbus/DbusManagerImpl.java
index ea591224..9ae58122 100644
--- a/src/main/java/org/asamk/signal/dbus/DbusManagerImpl.java
+++ b/src/main/java/org/asamk/signal/dbus/DbusManagerImpl.java
@@ -321,9 +321,9 @@ public class DbusManagerImpl implements Manager {
             final Message message, final Set<RecipientIdentifier> recipients
     ) throws IOException, AttachmentInvalidException, NotAGroupMemberException, GroupNotFoundException, GroupSendingNotAllowedException {
         return handleMessage(recipients,
-                numbers -> signal.sendMessage(message.getMessageText(), message.getAttachments(), numbers),
-                () -> signal.sendNoteToSelfMessage(message.getMessageText(), message.getAttachments()),
-                groupId -> signal.sendGroupMessage(message.getMessageText(), message.getAttachments(), groupId));
+                numbers -> signal.sendMessage(message.messageText(), message.attachments(), numbers),
+                () -> signal.sendNoteToSelfMessage(message.messageText(), message.attachments()),
+                groupId -> signal.sendGroupMessage(message.messageText(), message.attachments(), groupId));
     }
 
     @Override
diff --git a/src/main/java/org/asamk/signal/dbus/DbusSignalImpl.java b/src/main/java/org/asamk/signal/dbus/DbusSignalImpl.java
index ae7fc0de..69e36623 100644
--- a/src/main/java/org/asamk/signal/dbus/DbusSignalImpl.java
+++ b/src/main/java/org/asamk/signal/dbus/DbusSignalImpl.java
@@ -153,8 +153,8 @@ public class DbusSignalImpl implements Signal {
                             .map(RecipientIdentifier.class::cast)
                             .collect(Collectors.toSet()));
 
-            checkSendMessageResults(results.getTimestamp(), results.getResults());
-            return results.getTimestamp();
+            checkSendMessageResults(results.timestamp(), results.results());
+            return results.timestamp();
         } catch (AttachmentInvalidException e) {
             throw new Error.AttachmentInvalid(e.getMessage());
         } catch (IOException e) {
@@ -182,8 +182,8 @@ public class DbusSignalImpl implements Signal {
                     getSingleRecipientIdentifiers(recipients, m.getSelfNumber()).stream()
                             .map(RecipientIdentifier.class::cast)
                             .collect(Collectors.toSet()));
-            checkSendMessageResults(results.getTimestamp(), results.getResults());
-            return results.getTimestamp();
+            checkSendMessageResults(results.timestamp(), results.results());
+            return results.timestamp();
         } catch (IOException e) {
             throw new Error.Failure(e.getMessage());
         } catch (GroupNotFoundException | NotAGroupMemberException | GroupSendingNotAllowedException e) {
@@ -198,8 +198,8 @@ public class DbusSignalImpl implements Signal {
         try {
             final var results = m.sendRemoteDeleteMessage(targetSentTimestamp,
                     Set.of(new RecipientIdentifier.Group(getGroupId(groupId))));
-            checkSendMessageResults(results.getTimestamp(), results.getResults());
-            return results.getTimestamp();
+            checkSendMessageResults(results.timestamp(), results.results());
+            return results.timestamp();
         } catch (IOException e) {
             throw new Error.Failure(e.getMessage());
         } catch (GroupNotFoundException | NotAGroupMemberException | GroupSendingNotAllowedException e) {
@@ -236,8 +236,8 @@ public class DbusSignalImpl implements Signal {
                     getSingleRecipientIdentifiers(recipients, m.getSelfNumber()).stream()
                             .map(RecipientIdentifier.class::cast)
                             .collect(Collectors.toSet()));
-            checkSendMessageResults(results.getTimestamp(), results.getResults());
-            return results.getTimestamp();
+            checkSendMessageResults(results.timestamp(), results.results());
+            return results.timestamp();
         } catch (IOException e) {
             throw new Error.Failure(e.getMessage());
         } catch (GroupNotFoundException | NotAGroupMemberException | GroupSendingNotAllowedException e) {
@@ -303,8 +303,8 @@ public class DbusSignalImpl implements Signal {
         try {
             final var results = m.sendMessage(new Message(message, attachments),
                     Set.of(RecipientIdentifier.NoteToSelf.INSTANCE));
-            checkSendMessageResults(results.getTimestamp(), results.getResults());
-            return results.getTimestamp();
+            checkSendMessageResults(results.timestamp(), results.results());
+            return results.timestamp();
         } catch (AttachmentInvalidException e) {
             throw new Error.AttachmentInvalid(e.getMessage());
         } catch (IOException e) {
@@ -318,7 +318,7 @@ public class DbusSignalImpl implements Signal {
     public void sendEndSessionMessage(final List<String> recipients) {
         try {
             final var results = m.sendEndSessionMessage(getSingleRecipientIdentifiers(recipients, m.getSelfNumber()));
-            checkSendMessageResults(results.getTimestamp(), results.getResults());
+            checkSendMessageResults(results.timestamp(), results.results());
         } catch (IOException e) {
             throw new Error.Failure(e.getMessage());
         }
@@ -329,8 +329,8 @@ public class DbusSignalImpl implements Signal {
         try {
             var results = m.sendMessage(new Message(message, attachments),
                     Set.of(new RecipientIdentifier.Group(getGroupId(groupId))));
-            checkSendMessageResults(results.getTimestamp(), results.getResults());
-            return results.getTimestamp();
+            checkSendMessageResults(results.timestamp(), results.results());
+            return results.timestamp();
         } catch (IOException e) {
             throw new Error.Failure(e.getMessage());
         } catch (GroupNotFoundException | NotAGroupMemberException | GroupSendingNotAllowedException e) {
@@ -354,8 +354,8 @@ public class DbusSignalImpl implements Signal {
                     getSingleRecipientIdentifier(targetAuthor, m.getSelfNumber()),
                     targetSentTimestamp,
                     Set.of(new RecipientIdentifier.Group(getGroupId(groupId))));
-            checkSendMessageResults(results.getTimestamp(), results.getResults());
-            return results.getTimestamp();
+            checkSendMessageResults(results.timestamp(), results.results());
+            return results.timestamp();
         } catch (IOException e) {
             throw new Error.Failure(e.getMessage());
         } catch (GroupNotFoundException | NotAGroupMemberException | GroupSendingNotAllowedException e) {
@@ -420,7 +420,7 @@ public class DbusSignalImpl implements Signal {
         var groups = m.getGroups();
         var ids = new ArrayList<byte[]>(groups.size());
         for (var group : groups) {
-            ids.add(group.getGroupId().serialize());
+            ids.add(group.groupId().serialize());
         }
         return ids;
     }
@@ -444,10 +444,10 @@ public class DbusSignalImpl implements Signal {
     @Override
     public String getGroupName(final byte[] groupId) {
         var group = m.getGroup(getGroupId(groupId));
-        if (group == null || group.getTitle() == null) {
+        if (group == null || group.title() == null) {
             return "";
         } else {
-            return group.getTitle();
+            return group.title();
         }
     }
 
@@ -457,7 +457,7 @@ public class DbusSignalImpl implements Signal {
         if (group == null) {
             return List.of();
         } else {
-            final var members = group.getMembers();
+            final var members = group.members();
             return getRecipientStrings(members);
         }
     }
@@ -478,7 +478,7 @@ public class DbusSignalImpl implements Signal {
             final var memberIdentifiers = getSingleRecipientIdentifiers(members, m.getSelfNumber());
             if (groupId == null) {
                 final var results = m.createGroup(name, memberIdentifiers, avatar == null ? null : new File(avatar));
-                checkSendMessageResults(results.second().getTimestamp(), results.second().getResults());
+                checkSendMessageResults(results.second().timestamp(), results.second().results());
                 return results.first().serialize();
             } else {
                 final var results = m.updateGroup(getGroupId(groupId),
@@ -488,7 +488,7 @@ public class DbusSignalImpl implements Signal {
                                 .withAvatarFile(avatar == null ? null : new File(avatar))
                                 .build());
                 if (results != null) {
-                    checkSendMessageResults(results.getTimestamp(), results.getResults());
+                    checkSendMessageResults(results.timestamp(), results.results());
                 }
                 return groupId;
             }
@@ -600,8 +600,8 @@ public class DbusSignalImpl implements Signal {
     // all numbers the system knows
     @Override
     public List<String> listNumbers() {
-        return Stream.concat(m.getIdentities().stream().map(Identity::getRecipient),
-                m.getContacts().stream().map(Pair::first))
+        return Stream.concat(m.getIdentities().stream().map(Identity::recipient),
+                        m.getContacts().stream().map(Pair::first))
                 .map(a -> a.getNumber().orElse(null))
                 .filter(Objects::nonNull)
                 .distinct()
@@ -620,7 +620,7 @@ public class DbusSignalImpl implements Signal {
         }
         // Try profiles if no contact name was found
         for (var identity : m.getIdentities()) {
-            final var address = identity.getRecipient();
+            final var address = identity.recipient();
             var number = address.getNumber().orElse(null);
             if (number != null) {
                 Profile profile = null;
@@ -835,7 +835,7 @@ public class DbusSignalImpl implements Signal {
             if (d.isThisDevice()) {
                 thisDevice = new DBusPath(deviceObjectPath);
             }
-            this.devices.add(new StructDevice(new DBusPath(deviceObjectPath), d.getId(), emptyIfNull(d.getName())));
+            this.devices.add(new StructDevice(new DBusPath(deviceObjectPath), d.id(), emptyIfNull(d.name())));
         });
     }
 
@@ -862,15 +862,15 @@ public class DbusSignalImpl implements Signal {
         unExportGroups();
 
         groups.forEach(g -> {
-            final var object = new DbusSignalGroupImpl(g.getGroupId());
+            final var object = new DbusSignalGroupImpl(g.groupId());
             try {
                 connection.exportObject(object);
             } catch (DBusException e) {
                 e.printStackTrace();
             }
             this.groups.add(new StructGroup(new DBusPath(object.getObjectPath()),
-                    g.getGroupId().serialize(),
-                    emptyIfNull(g.getTitle())));
+                    g.groupId().serialize(),
+                    emptyIfNull(g.title())));
         });
     }
 
@@ -885,22 +885,22 @@ public class DbusSignalImpl implements Signal {
 
         public DbusSignalDeviceImpl(final org.asamk.signal.manager.api.Device device) {
             super.addPropertiesHandler(new DbusInterfacePropertiesHandler("org.asamk.Signal.Device",
-                    List.of(new DbusProperty<>("Id", device::getId),
-                            new DbusProperty<>("Name", () -> emptyIfNull(device.getName()), this::setDeviceName),
-                            new DbusProperty<>("Created", device::getCreated),
-                            new DbusProperty<>("LastSeen", device::getLastSeen))));
+                    List.of(new DbusProperty<>("Id", device::id),
+                            new DbusProperty<>("Name", () -> emptyIfNull(device.name()), this::setDeviceName),
+                            new DbusProperty<>("Created", device::created),
+                            new DbusProperty<>("LastSeen", device::lastSeen))));
             this.device = device;
         }
 
         @Override
         public String getObjectPath() {
-            return getDeviceObjectPath(objectPath, device.getId());
+            return getDeviceObjectPath(objectPath, device.id());
         }
 
         @Override
         public void removeDevice() throws Error.Failure {
             try {
-                m.removeLinkedDevices(device.getId());
+                m.removeLinkedDevices(device.id());
                 updateDevices();
             } catch (IOException e) {
                 throw new Error.Failure(e.getMessage());
@@ -929,36 +929,36 @@ public class DbusSignalImpl implements Signal {
             this.groupId = groupId;
             super.addPropertiesHandler(new DbusInterfacePropertiesHandler("org.asamk.Signal.Group",
                     List.of(new DbusProperty<>("Id", groupId::serialize),
-                            new DbusProperty<>("Name", () -> emptyIfNull(getGroup().getTitle()), this::setGroupName),
+                            new DbusProperty<>("Name", () -> emptyIfNull(getGroup().title()), this::setGroupName),
                             new DbusProperty<>("Description",
-                                    () -> emptyIfNull(getGroup().getDescription()),
+                                    () -> emptyIfNull(getGroup().description()),
                                     this::setGroupDescription),
                             new DbusProperty<>("Avatar", this::setGroupAvatar),
                             new DbusProperty<>("IsBlocked", () -> getGroup().isBlocked(), this::setIsBlocked),
                             new DbusProperty<>("IsMember", () -> getGroup().isMember()),
                             new DbusProperty<>("IsAdmin", () -> getGroup().isAdmin()),
                             new DbusProperty<>("MessageExpirationTimer",
-                                    () -> getGroup().getMessageExpirationTimer(),
+                                    () -> getGroup().messageExpirationTimer(),
                                     this::setMessageExpirationTime),
                             new DbusProperty<>("Members",
-                                    () -> new Variant<>(getRecipientStrings(getGroup().getMembers()), "as")),
+                                    () -> new Variant<>(getRecipientStrings(getGroup().members()), "as")),
                             new DbusProperty<>("PendingMembers",
-                                    () -> new Variant<>(getRecipientStrings(getGroup().getPendingMembers()), "as")),
+                                    () -> new Variant<>(getRecipientStrings(getGroup().pendingMembers()), "as")),
                             new DbusProperty<>("RequestingMembers",
-                                    () -> new Variant<>(getRecipientStrings(getGroup().getRequestingMembers()), "as")),
+                                    () -> new Variant<>(getRecipientStrings(getGroup().requestingMembers()), "as")),
                             new DbusProperty<>("Admins",
-                                    () -> new Variant<>(getRecipientStrings(getGroup().getAdminMembers()), "as")),
+                                    () -> new Variant<>(getRecipientStrings(getGroup().adminMembers()), "as")),
                             new DbusProperty<>("PermissionAddMember",
-                                    () -> getGroup().getPermissionAddMember().name(),
+                                    () -> getGroup().permissionAddMember().name(),
                                     this::setGroupPermissionAddMember),
                             new DbusProperty<>("PermissionEditDetails",
-                                    () -> getGroup().getPermissionEditDetails().name(),
+                                    () -> getGroup().permissionEditDetails().name(),
                                     this::setGroupPermissionEditDetails),
                             new DbusProperty<>("PermissionSendMessage",
-                                    () -> getGroup().getPermissionSendMessage().name(),
+                                    () -> getGroup().permissionSendMessage().name(),
                                     this::setGroupPermissionSendMessage),
                             new DbusProperty<>("GroupInviteLink", () -> {
-                                final var groupInviteLinkUrl = getGroup().getGroupInviteLinkUrl();
+                                final var groupInviteLinkUrl = getGroup().groupInviteLinkUrl();
                                 return groupInviteLinkUrl == null ? "" : groupInviteLinkUrl.getUrl();
                             }))));
         }
diff --git a/src/main/java/org/asamk/signal/json/JsonAttachment.java b/src/main/java/org/asamk/signal/json/JsonAttachment.java
index a96fc534..b78722d1 100644
--- a/src/main/java/org/asamk/signal/json/JsonAttachment.java
+++ b/src/main/java/org/asamk/signal/json/JsonAttachment.java
@@ -1,43 +1,25 @@
 package org.asamk.signal.json;
 
-import com.fasterxml.jackson.annotation.JsonProperty;
-
 import org.whispersystems.signalservice.api.messages.SignalServiceAttachment;
 
-class JsonAttachment {
-
-    @JsonProperty
-    final String contentType;
-
-    @JsonProperty
-    final String filename;
-
-    @JsonProperty
-    final String id;
-
-    @JsonProperty
-    final Long size;
-
-    JsonAttachment(SignalServiceAttachment attachment) {
-        this.contentType = attachment.getContentType();
+record JsonAttachment(String contentType, String filename, String id, Long size) {
 
+    static JsonAttachment from(SignalServiceAttachment attachment) {
         if (attachment.isPointer()) {
             final var pointer = attachment.asPointer();
-            this.id = pointer.getRemoteId().toString();
-            this.filename = pointer.getFileName().orNull();
-            this.size = pointer.getSize().transform(Integer::longValue).orNull();
+            final var id = pointer.getRemoteId().toString();
+            final var filename = pointer.getFileName().orNull();
+            final var size = pointer.getSize().transform(Integer::longValue).orNull();
+            return new JsonAttachment(attachment.getContentType(), filename, id, size);
         } else {
             final var stream = attachment.asStream();
-            this.id = null;
-            this.filename = stream.getFileName().orNull();
-            this.size = stream.getLength();
+            final var filename = stream.getFileName().orNull();
+            final var size = stream.getLength();
+            return new JsonAttachment(attachment.getContentType(), filename, null, size);
         }
     }
 
-    JsonAttachment(String filename) {
-        this.filename = filename;
-        this.contentType = null;
-        this.id = null;
-        this.size = null;
+    static JsonAttachment from(String filename) {
+        return new JsonAttachment(filename, null, null, null);
     }
 }
diff --git a/src/main/java/org/asamk/signal/json/JsonCallMessage.java b/src/main/java/org/asamk/signal/json/JsonCallMessage.java
index 885c38a4..e30aeafa 100644
--- a/src/main/java/org/asamk/signal/json/JsonCallMessage.java
+++ b/src/main/java/org/asamk/signal/json/JsonCallMessage.java
@@ -1,7 +1,6 @@
 package org.asamk.signal.json;
 
 import com.fasterxml.jackson.annotation.JsonInclude;
-import com.fasterxml.jackson.annotation.JsonProperty;
 
 import org.whispersystems.signalservice.api.messages.calls.AnswerMessage;
 import org.whispersystems.signalservice.api.messages.calls.BusyMessage;
@@ -12,33 +11,19 @@ import org.whispersystems.signalservice.api.messages.calls.SignalServiceCallMess
 
 import java.util.List;
 
-class JsonCallMessage {
+record JsonCallMessage(
+        @JsonInclude(JsonInclude.Include.NON_NULL) OfferMessage offerMessage,
+        @JsonInclude(JsonInclude.Include.NON_NULL) AnswerMessage answerMessage,
+        @JsonInclude(JsonInclude.Include.NON_NULL) BusyMessage busyMessage,
+        @JsonInclude(JsonInclude.Include.NON_NULL) HangupMessage hangupMessage,
+        @JsonInclude(JsonInclude.Include.NON_NULL) List<IceUpdateMessage> iceUpdateMessages
+) {
 
-    @JsonProperty
-    @JsonInclude(JsonInclude.Include.NON_NULL)
-    final OfferMessage offerMessage;
-
-    @JsonProperty
-    @JsonInclude(JsonInclude.Include.NON_NULL)
-    final AnswerMessage answerMessage;
-
-    @JsonProperty
-    @JsonInclude(JsonInclude.Include.NON_NULL)
-    final BusyMessage busyMessage;
-
-    @JsonProperty
-    @JsonInclude(JsonInclude.Include.NON_NULL)
-    final HangupMessage hangupMessage;
-
-    @JsonProperty
-    @JsonInclude(JsonInclude.Include.NON_NULL)
-    final List<IceUpdateMessage> iceUpdateMessages;
-
-    JsonCallMessage(SignalServiceCallMessage callMessage) {
-        this.offerMessage = callMessage.getOfferMessage().orNull();
-        this.answerMessage = callMessage.getAnswerMessage().orNull();
-        this.busyMessage = callMessage.getBusyMessage().orNull();
-        this.hangupMessage = callMessage.getHangupMessage().orNull();
-        this.iceUpdateMessages = callMessage.getIceUpdateMessages().orNull();
+    static JsonCallMessage from(SignalServiceCallMessage callMessage) {
+        return new JsonCallMessage(callMessage.getOfferMessage().orNull(),
+                callMessage.getAnswerMessage().orNull(),
+                callMessage.getBusyMessage().orNull(),
+                callMessage.getHangupMessage().orNull(),
+                callMessage.getIceUpdateMessages().orNull());
     }
 }
diff --git a/src/main/java/org/asamk/signal/json/JsonContactAddress.java b/src/main/java/org/asamk/signal/json/JsonContactAddress.java
index 712dd4f3..6ffd355b 100644
--- a/src/main/java/org/asamk/signal/json/JsonContactAddress.java
+++ b/src/main/java/org/asamk/signal/json/JsonContactAddress.java
@@ -1,48 +1,29 @@
 package org.asamk.signal.json;
 
-import com.fasterxml.jackson.annotation.JsonProperty;
-
 import org.asamk.signal.util.Util;
 import org.whispersystems.signalservice.api.messages.shared.SharedContact;
 
-public class JsonContactAddress {
+public record JsonContactAddress(
+        SharedContact.PostalAddress.Type type,
+        String label,
+        String street,
+        String pobox,
+        String neighborhood,
+        String city,
+        String region,
+        String postcode,
+        String country
+) {
 
-    @JsonProperty
-    private final SharedContact.PostalAddress.Type type;
-
-    @JsonProperty
-    private final String label;
-
-    @JsonProperty
-    private final String street;
-
-    @JsonProperty
-    private final String pobox;
-
-    @JsonProperty
-    private final String neighborhood;
-
-    @JsonProperty
-    private final String city;
-
-    @JsonProperty
-    private final String region;
-
-    @JsonProperty
-    private final String postcode;
-
-    @JsonProperty
-    private final String country;
-
-    public JsonContactAddress(SharedContact.PostalAddress address) {
-        type = address.getType();
-        label = Util.getStringIfNotBlank(address.getLabel());
-        street = Util.getStringIfNotBlank(address.getStreet());
-        pobox = Util.getStringIfNotBlank(address.getPobox());
-        neighborhood = Util.getStringIfNotBlank(address.getNeighborhood());
-        city = Util.getStringIfNotBlank(address.getCity());
-        region = Util.getStringIfNotBlank(address.getRegion());
-        postcode = Util.getStringIfNotBlank(address.getPostcode());
-        country = Util.getStringIfNotBlank(address.getCountry());
+    static JsonContactAddress from(SharedContact.PostalAddress address) {
+        return new JsonContactAddress(address.getType(),
+                Util.getStringIfNotBlank(address.getLabel()),
+                Util.getStringIfNotBlank(address.getStreet()),
+                Util.getStringIfNotBlank(address.getPobox()),
+                Util.getStringIfNotBlank(address.getNeighborhood()),
+                Util.getStringIfNotBlank(address.getCity()),
+                Util.getStringIfNotBlank(address.getRegion()),
+                Util.getStringIfNotBlank(address.getPostcode()),
+                Util.getStringIfNotBlank(address.getCountry()));
     }
 }
diff --git a/src/main/java/org/asamk/signal/json/JsonContactAvatar.java b/src/main/java/org/asamk/signal/json/JsonContactAvatar.java
index 3ed55f6f..1bf53d04 100644
--- a/src/main/java/org/asamk/signal/json/JsonContactAvatar.java
+++ b/src/main/java/org/asamk/signal/json/JsonContactAvatar.java
@@ -1,19 +1,10 @@
 package org.asamk.signal.json;
 
-import com.fasterxml.jackson.annotation.JsonProperty;
-
 import org.whispersystems.signalservice.api.messages.shared.SharedContact;
 
-public class JsonContactAvatar {
+public record JsonContactAvatar(JsonAttachment attachment, boolean isProfile) {
 
-    @JsonProperty
-    private final JsonAttachment attachment;
-
-    @JsonProperty
-    private final boolean isProfile;
-
-    public JsonContactAvatar(SharedContact.Avatar avatar) {
-        attachment = new JsonAttachment(avatar.getAttachment());
-        isProfile = avatar.isProfile();
+    static JsonContactAvatar from(SharedContact.Avatar avatar) {
+        return new JsonContactAvatar(JsonAttachment.from(avatar.getAttachment()), avatar.isProfile());
     }
 }
diff --git a/src/main/java/org/asamk/signal/json/JsonContactEmail.java b/src/main/java/org/asamk/signal/json/JsonContactEmail.java
index 070cfb72..ea6014c1 100644
--- a/src/main/java/org/asamk/signal/json/JsonContactEmail.java
+++ b/src/main/java/org/asamk/signal/json/JsonContactEmail.java
@@ -1,24 +1,11 @@
 package org.asamk.signal.json;
 
-import com.fasterxml.jackson.annotation.JsonProperty;
-
 import org.asamk.signal.util.Util;
 import org.whispersystems.signalservice.api.messages.shared.SharedContact;
 
-public class JsonContactEmail {
+public record JsonContactEmail(String value, SharedContact.Email.Type type, String label) {
 
-    @JsonProperty
-    private final String value;
-
-    @JsonProperty
-    private final SharedContact.Email.Type type;
-
-    @JsonProperty
-    private final String label;
-
-    public JsonContactEmail(SharedContact.Email email) {
-        value = email.getValue();
-        type = email.getType();
-        label = Util.getStringIfNotBlank(email.getLabel());
+    static JsonContactEmail from(SharedContact.Email email) {
+        return new JsonContactEmail(email.getValue(), email.getType(), Util.getStringIfNotBlank(email.getLabel()));
     }
 }
diff --git a/src/main/java/org/asamk/signal/json/JsonContactName.java b/src/main/java/org/asamk/signal/json/JsonContactName.java
index 9da27825..9c7af32b 100644
--- a/src/main/java/org/asamk/signal/json/JsonContactName.java
+++ b/src/main/java/org/asamk/signal/json/JsonContactName.java
@@ -1,36 +1,18 @@
 package org.asamk.signal.json;
 
-import com.fasterxml.jackson.annotation.JsonProperty;
-
 import org.asamk.signal.util.Util;
 import org.whispersystems.signalservice.api.messages.shared.SharedContact;
 
-public class JsonContactName {
+public record JsonContactName(
+        String display, String given, String family, String prefix, String suffix, String middle
+) {
 
-    @JsonProperty
-    private final String display;
-
-    @JsonProperty
-    private final String given;
-
-    @JsonProperty
-    private final String family;
-
-    @JsonProperty
-    private final String prefix;
-
-    @JsonProperty
-    private final String suffix;
-
-    @JsonProperty
-    private final String middle;
-
-    public JsonContactName(SharedContact.Name name) {
-        display = Util.getStringIfNotBlank(name.getDisplay());
-        given = Util.getStringIfNotBlank(name.getGiven());
-        family = Util.getStringIfNotBlank(name.getFamily());
-        prefix = Util.getStringIfNotBlank(name.getPrefix());
-        suffix = Util.getStringIfNotBlank(name.getSuffix());
-        middle = Util.getStringIfNotBlank(name.getMiddle());
+    static JsonContactName from(SharedContact.Name name) {
+        return new JsonContactName(Util.getStringIfNotBlank(name.getDisplay()),
+                Util.getStringIfNotBlank(name.getGiven()),
+                Util.getStringIfNotBlank(name.getFamily()),
+                Util.getStringIfNotBlank(name.getPrefix()),
+                Util.getStringIfNotBlank(name.getSuffix()),
+                Util.getStringIfNotBlank(name.getMiddle()));
     }
 }
diff --git a/src/main/java/org/asamk/signal/json/JsonContactPhone.java b/src/main/java/org/asamk/signal/json/JsonContactPhone.java
index fce75843..6c23339e 100644
--- a/src/main/java/org/asamk/signal/json/JsonContactPhone.java
+++ b/src/main/java/org/asamk/signal/json/JsonContactPhone.java
@@ -1,24 +1,11 @@
 package org.asamk.signal.json;
 
-import com.fasterxml.jackson.annotation.JsonProperty;
-
 import org.asamk.signal.util.Util;
 import org.whispersystems.signalservice.api.messages.shared.SharedContact;
 
-public class JsonContactPhone {
+public record JsonContactPhone(String value, SharedContact.Phone.Type type, String label) {
 
-    @JsonProperty
-    private final String value;
-
-    @JsonProperty
-    private final SharedContact.Phone.Type type;
-
-    @JsonProperty
-    private final String label;
-
-    public JsonContactPhone(SharedContact.Phone phone) {
-        value = phone.getValue();
-        type = phone.getType();
-        label = Util.getStringIfNotBlank(phone.getLabel());
+    static JsonContactPhone from(SharedContact.Phone phone) {
+        return new JsonContactPhone(phone.getValue(), phone.getType(), Util.getStringIfNotBlank(phone.getLabel()));
     }
 }
diff --git a/src/main/java/org/asamk/signal/json/JsonDataMessage.java b/src/main/java/org/asamk/signal/json/JsonDataMessage.java
index 6dbda978..1e898175 100644
--- a/src/main/java/org/asamk/signal/json/JsonDataMessage.java
+++ b/src/main/java/org/asamk/signal/json/JsonDataMessage.java
@@ -1,7 +1,6 @@
 package org.asamk.signal.json;
 
 import com.fasterxml.jackson.annotation.JsonInclude;
-import com.fasterxml.jackson.annotation.JsonProperty;
 
 import org.asamk.Signal;
 import org.asamk.signal.manager.Manager;
@@ -10,136 +9,124 @@ import org.whispersystems.signalservice.api.messages.SignalServiceDataMessage;
 import java.util.List;
 import java.util.stream.Collectors;
 
-class JsonDataMessage {
+record JsonDataMessage(
+        long timestamp,
+        String message,
+        Integer expiresInSeconds,
+        @JsonInclude(JsonInclude.Include.NON_NULL) Boolean viewOnce,
+        @JsonInclude(JsonInclude.Include.NON_NULL) JsonReaction reaction,
+        @JsonInclude(JsonInclude.Include.NON_NULL) JsonQuote quote,
+        @JsonInclude(JsonInclude.Include.NON_NULL) List<JsonMention> mentions,
+        @JsonInclude(JsonInclude.Include.NON_NULL) List<JsonAttachment> attachments,
+        @JsonInclude(JsonInclude.Include.NON_NULL) JsonSticker sticker,
+        @JsonInclude(JsonInclude.Include.NON_NULL) JsonRemoteDelete remoteDelete,
+        @JsonInclude(JsonInclude.Include.NON_NULL) List<JsonSharedContact> contacts,
+        @JsonInclude(JsonInclude.Include.NON_NULL) JsonGroupInfo groupInfo
+) {
 
-    @JsonProperty
-    final long timestamp;
-
-    @JsonProperty
-    final String message;
-
-    @JsonProperty
-    final Integer expiresInSeconds;
-
-    @JsonProperty
-    @JsonInclude(JsonInclude.Include.NON_NULL)
-    final Boolean viewOnce;
-
-    @JsonProperty
-    @JsonInclude(JsonInclude.Include.NON_NULL)
-    final JsonReaction reaction;
-
-    @JsonProperty
-    @JsonInclude(JsonInclude.Include.NON_NULL)
-    final JsonQuote quote;
-
-    @JsonProperty
-    @JsonInclude(JsonInclude.Include.NON_NULL)
-    final List<JsonMention> mentions;
-
-    @JsonProperty
-    @JsonInclude(JsonInclude.Include.NON_NULL)
-    final List<JsonAttachment> attachments;
-
-    @JsonProperty
-    @JsonInclude(JsonInclude.Include.NON_NULL)
-    final JsonSticker sticker;
-
-    @JsonProperty
-    @JsonInclude(JsonInclude.Include.NON_NULL)
-    final JsonRemoteDelete remoteDelete;
-
-    @JsonProperty
-    @JsonInclude(JsonInclude.Include.NON_NULL)
-    final List<JsonSharedContact> contacts;
-
-    @JsonProperty
-    @JsonInclude(JsonInclude.Include.NON_NULL)
-    final JsonGroupInfo groupInfo;
-
-    JsonDataMessage(SignalServiceDataMessage dataMessage, Manager m) {
-        this.timestamp = dataMessage.getTimestamp();
+    static JsonDataMessage from(SignalServiceDataMessage dataMessage, Manager m) {
+        final var timestamp = dataMessage.getTimestamp();
+        final JsonGroupInfo groupInfo;
         if (dataMessage.getGroupContext().isPresent()) {
             final var groupContext = dataMessage.getGroupContext().get();
             if (groupContext.getGroupV1().isPresent()) {
-                var groupInfo = groupContext.getGroupV1().get();
-                this.groupInfo = new JsonGroupInfo(groupInfo);
+                var group = groupContext.getGroupV1().get();
+                groupInfo = JsonGroupInfo.from(group);
             } else if (groupContext.getGroupV2().isPresent()) {
-                var groupInfo = groupContext.getGroupV2().get();
-                this.groupInfo = new JsonGroupInfo(groupInfo);
+                var group = groupContext.getGroupV2().get();
+                groupInfo = JsonGroupInfo.from(group);
             } else {
-                this.groupInfo = null;
+                groupInfo = null;
             }
         } else {
-            this.groupInfo = null;
+            groupInfo = null;
         }
-        this.message = dataMessage.getBody().orNull();
-        this.expiresInSeconds = dataMessage.getExpiresInSeconds();
-        this.viewOnce = dataMessage.isViewOnce();
-        this.reaction = dataMessage.getReaction().isPresent()
-                ? new JsonReaction(dataMessage.getReaction().get(), m)
-                : null;
-        this.quote = dataMessage.getQuote().isPresent() ? new JsonQuote(dataMessage.getQuote().get(), m) : null;
+        final var message = dataMessage.getBody().orNull();
+        final var expiresInSeconds = dataMessage.getExpiresInSeconds();
+        final var viewOnce = dataMessage.isViewOnce();
+        final var reaction = dataMessage.getReaction().isPresent() ? JsonReaction.from(dataMessage.getReaction().get(),
+                m) : null;
+        final var quote = dataMessage.getQuote().isPresent() ? JsonQuote.from(dataMessage.getQuote().get(), m) : null;
+        final List<JsonMention> mentions;
         if (dataMessage.getMentions().isPresent()) {
-            this.mentions = dataMessage.getMentions()
+            mentions = dataMessage.getMentions()
                     .get()
                     .stream()
-                    .map(mention -> new JsonMention(mention, m))
+                    .map(mention -> JsonMention.from(mention, m))
                     .collect(Collectors.toList());
         } else {
-            this.mentions = List.of();
+            mentions = List.of();
         }
-        remoteDelete = dataMessage.getRemoteDelete().isPresent() ? new JsonRemoteDelete(dataMessage.getRemoteDelete()
-                .get()) : null;
+        final var remoteDelete = dataMessage.getRemoteDelete().isPresent()
+                ? JsonRemoteDelete.from(dataMessage.getRemoteDelete().get())
+                : null;
+        final List<JsonAttachment> attachments;
         if (dataMessage.getAttachments().isPresent()) {
-            this.attachments = dataMessage.getAttachments()
+            attachments = dataMessage.getAttachments()
                     .get()
                     .stream()
-                    .map(JsonAttachment::new)
+                    .map(JsonAttachment::from)
                     .collect(Collectors.toList());
         } else {
-            this.attachments = List.of();
+            attachments = List.of();
         }
-        this.sticker = dataMessage.getSticker().isPresent() ? new JsonSticker(dataMessage.getSticker().get()) : null;
+        final var sticker = dataMessage.getSticker().isPresent()
+                ? JsonSticker.from(dataMessage.getSticker().get())
+                : null;
 
+        final List<JsonSharedContact> contacts;
         if (dataMessage.getSharedContacts().isPresent()) {
-            this.contacts = dataMessage.getSharedContacts()
+            contacts = dataMessage.getSharedContacts()
                     .get()
                     .stream()
-                    .map(JsonSharedContact::new)
+                    .map(JsonSharedContact::from)
                     .collect(Collectors.toList());
         } else {
-            this.contacts = List.of();
+            contacts = List.of();
         }
+        return new JsonDataMessage(timestamp,
+                message,
+                expiresInSeconds,
+                viewOnce,
+                reaction,
+                quote,
+                mentions,
+                attachments,
+                sticker,
+                remoteDelete,
+                contacts,
+                groupInfo);
     }
 
-    public JsonDataMessage(Signal.MessageReceived messageReceived) {
-        timestamp = messageReceived.getTimestamp();
-        message = messageReceived.getMessage();
-        groupInfo = messageReceived.getGroupId().length > 0 ? new JsonGroupInfo(messageReceived.getGroupId()) : null;
-        expiresInSeconds = null;
-        viewOnce = null;
-        remoteDelete = null;
-        reaction = null;    // TODO Replace these 5 with the proper commands
-        quote = null;
-        mentions = null;
-        sticker = null;
-        contacts = null;
-        attachments = messageReceived.getAttachments().stream().map(JsonAttachment::new).collect(Collectors.toList());
+    static JsonDataMessage from(Signal.MessageReceived messageReceived) {
+        return new JsonDataMessage(messageReceived.getTimestamp(),
+                messageReceived.getMessage(),
+                // TODO Replace these with the proper commands
+                null,
+                null,
+                null,
+                null,
+                null,
+                messageReceived.getAttachments().stream().map(JsonAttachment::from).collect(Collectors.toList()),
+                null,
+                null,
+                null,
+                messageReceived.getGroupId().length > 0 ? JsonGroupInfo.from(messageReceived.getGroupId()) : null);
     }
 
-    public JsonDataMessage(Signal.SyncMessageReceived messageReceived) {
-        timestamp = messageReceived.getTimestamp();
-        message = messageReceived.getMessage();
-        groupInfo = messageReceived.getGroupId().length > 0 ? new JsonGroupInfo(messageReceived.getGroupId()) : null;
-        expiresInSeconds = null;
-        viewOnce = null;
-        remoteDelete = null;
-        reaction = null;    // TODO Replace these 5 with the proper commands
-        quote = null;
-        mentions = null;
-        sticker = null;
-        contacts = null;
-        attachments = messageReceived.getAttachments().stream().map(JsonAttachment::new).collect(Collectors.toList());
+    static JsonDataMessage from(Signal.SyncMessageReceived messageReceived) {
+        return new JsonDataMessage(messageReceived.getTimestamp(),
+                messageReceived.getMessage(),
+                // TODO Replace these with the proper commands
+                null,
+                null,
+                null,
+                null,
+                null,
+                messageReceived.getAttachments().stream().map(JsonAttachment::from).collect(Collectors.toList()),
+                null,
+                null,
+                null,
+                messageReceived.getGroupId().length > 0 ? JsonGroupInfo.from(messageReceived.getGroupId()) : null);
     }
 }
diff --git a/src/main/java/org/asamk/signal/json/JsonError.java b/src/main/java/org/asamk/signal/json/JsonError.java
index 45274dea..07f8a431 100644
--- a/src/main/java/org/asamk/signal/json/JsonError.java
+++ b/src/main/java/org/asamk/signal/json/JsonError.java
@@ -1,17 +1,8 @@
 package org.asamk.signal.json;
 
-import com.fasterxml.jackson.annotation.JsonProperty;
+public record JsonError(String message, String type) {
 
-public class JsonError {
-
-    @JsonProperty
-    final String message;
-
-    @JsonProperty
-    final String type;
-
-    public JsonError(Throwable exception) {
-        this.message = exception.getMessage();
-        this.type = exception.getClass().getSimpleName();
+    public static JsonError from(Throwable exception) {
+        return new JsonError(exception.getMessage(), exception.getClass().getSimpleName());
     }
 }
diff --git a/src/main/java/org/asamk/signal/json/JsonGroupInfo.java b/src/main/java/org/asamk/signal/json/JsonGroupInfo.java
index de78186a..2c1a5b80 100644
--- a/src/main/java/org/asamk/signal/json/JsonGroupInfo.java
+++ b/src/main/java/org/asamk/signal/json/JsonGroupInfo.java
@@ -1,7 +1,6 @@
 package org.asamk.signal.json;
 
 import com.fasterxml.jackson.annotation.JsonInclude;
-import com.fasterxml.jackson.annotation.JsonProperty;
 
 import org.asamk.signal.manager.groups.GroupUtils;
 import org.asamk.signal.util.Util;
@@ -12,48 +11,32 @@ import java.util.Base64;
 import java.util.List;
 import java.util.stream.Collectors;
 
-class JsonGroupInfo {
+record JsonGroupInfo(
+        String groupId,
+        String type,
+        @JsonInclude(JsonInclude.Include.NON_NULL) String name,
+        @JsonInclude(JsonInclude.Include.NON_NULL) List<String> members
+) {
 
-    @JsonProperty
-    final String groupId;
-
-    @JsonProperty
-    final String type;
-
-    @JsonProperty
-    @JsonInclude(JsonInclude.Include.NON_NULL)
-    final String name;
-
-    @JsonProperty
-    @JsonInclude(JsonInclude.Include.NON_NULL)
-    final List<String> members;
-
-    JsonGroupInfo(SignalServiceGroup groupInfo) {
-        this.groupId = Base64.getEncoder().encodeToString(groupInfo.getGroupId());
-        this.type = groupInfo.getType().toString();
-        this.name = groupInfo.getName().orNull();
-        if (groupInfo.getMembers().isPresent()) {
-            this.members = groupInfo.getMembers()
-                    .get()
-                    .stream()
-                    .map(Util::getLegacyIdentifier)
-                    .collect(Collectors.toList());
-        } else {
-            this.members = null;
-        }
+    static JsonGroupInfo from(SignalServiceGroup groupInfo) {
+        return new JsonGroupInfo(Base64.getEncoder().encodeToString(groupInfo.getGroupId()),
+                groupInfo.getType().toString(),
+                groupInfo.getName().orNull(),
+                groupInfo.getMembers().isPresent() ? groupInfo.getMembers()
+                        .get()
+                        .stream()
+                        .map(Util::getLegacyIdentifier)
+                        .collect(Collectors.toList()) : null);
     }
 
-    JsonGroupInfo(SignalServiceGroupV2 groupInfo) {
-        this.groupId = GroupUtils.getGroupIdV2(groupInfo.getMasterKey()).toBase64();
-        this.type = groupInfo.hasSignedGroupChange() ? "UPDATE" : "DELIVER";
-        this.members = null;
-        this.name = null;
+    static JsonGroupInfo from(SignalServiceGroupV2 groupInfo) {
+        return new JsonGroupInfo(GroupUtils.getGroupIdV2(groupInfo.getMasterKey()).toBase64(),
+                groupInfo.hasSignedGroupChange() ? "UPDATE" : "DELIVER",
+                null,
+                null);
     }
 
-    JsonGroupInfo(byte[] groupId) {
-        this.groupId = Base64.getEncoder().encodeToString(groupId);
-        this.type = "DELIVER";
-        this.members = null;
-        this.name = null;
+    static JsonGroupInfo from(byte[] groupId) {
+        return new JsonGroupInfo(Base64.getEncoder().encodeToString(groupId), "DELIVER", null, null);
     }
 }
diff --git a/src/main/java/org/asamk/signal/json/JsonMention.java b/src/main/java/org/asamk/signal/json/JsonMention.java
index 3c6f2eec..66fcc1f1 100644
--- a/src/main/java/org/asamk/signal/json/JsonMention.java
+++ b/src/main/java/org/asamk/signal/json/JsonMention.java
@@ -1,37 +1,19 @@
 package org.asamk.signal.json;
 
-import com.fasterxml.jackson.annotation.JsonProperty;
-
 import org.asamk.signal.manager.Manager;
 import org.whispersystems.signalservice.api.messages.SignalServiceDataMessage;
 import org.whispersystems.signalservice.api.push.SignalServiceAddress;
 
 import static org.asamk.signal.util.Util.getLegacyIdentifier;
 
-public class JsonMention {
+public record JsonMention(@Deprecated String name, String number, String uuid, int start, int length) {
 
-    @JsonProperty
-    @Deprecated
-    final String name;
-
-    @JsonProperty
-    final String number;
-
-    @JsonProperty
-    final String uuid;
-
-    @JsonProperty
-    final int start;
-
-    @JsonProperty
-    final int length;
-
-    JsonMention(SignalServiceDataMessage.Mention mention, Manager m) {
+    static JsonMention from(SignalServiceDataMessage.Mention mention, Manager m) {
         final var address = m.resolveSignalServiceAddress(new SignalServiceAddress(mention.getUuid()));
-        this.name = getLegacyIdentifier(address);
-        this.number = address.getNumber().orNull();
-        this.uuid = address.getUuid().toString();
-        this.start = mention.getStart();
-        this.length = mention.getLength();
+        return new JsonMention(getLegacyIdentifier(address),
+                address.getNumber().orNull(),
+                address.getUuid().toString(),
+                mention.getStart(),
+                mention.getLength());
     }
 }
diff --git a/src/main/java/org/asamk/signal/json/JsonMessageEnvelope.java b/src/main/java/org/asamk/signal/json/JsonMessageEnvelope.java
index 0d44de5d..f5d70d28 100644
--- a/src/main/java/org/asamk/signal/json/JsonMessageEnvelope.java
+++ b/src/main/java/org/asamk/signal/json/JsonMessageEnvelope.java
@@ -1,7 +1,6 @@
 package org.asamk.signal.json;
 
 import com.fasterxml.jackson.annotation.JsonInclude;
-import com.fasterxml.jackson.annotation.JsonProperty;
 
 import org.asamk.Signal;
 import org.asamk.signal.manager.Manager;
@@ -15,143 +14,133 @@ import java.util.List;
 
 import static org.asamk.signal.util.Util.getLegacyIdentifier;
 
-public class JsonMessageEnvelope {
+public record JsonMessageEnvelope(
+        @Deprecated String source,
+        String sourceNumber,
+        String sourceUuid,
+        String sourceName,
+        Integer sourceDevice,
+        long timestamp,
+        @JsonInclude(JsonInclude.Include.NON_NULL) JsonDataMessage dataMessage,
+        @JsonInclude(JsonInclude.Include.NON_NULL) JsonSyncMessage syncMessage,
+        @JsonInclude(JsonInclude.Include.NON_NULL) JsonCallMessage callMessage,
+        @JsonInclude(JsonInclude.Include.NON_NULL) JsonReceiptMessage receiptMessage,
+        @JsonInclude(JsonInclude.Include.NON_NULL) JsonTypingMessage typingMessage
+) {
 
-    @JsonProperty
-    @Deprecated
-    final String source;
-
-    @JsonProperty
-    final String sourceNumber;
-
-    @JsonProperty
-    final String sourceUuid;
-
-    @JsonProperty
-    final String sourceName;
-
-    @JsonProperty
-    final Integer sourceDevice;
-
-    @JsonProperty
-    final long timestamp;
-
-    @JsonProperty
-    @JsonInclude(JsonInclude.Include.NON_NULL)
-    final JsonDataMessage dataMessage;
-
-    @JsonProperty
-    @JsonInclude(JsonInclude.Include.NON_NULL)
-    final JsonSyncMessage syncMessage;
-
-    @JsonProperty
-    @JsonInclude(JsonInclude.Include.NON_NULL)
-    final JsonCallMessage callMessage;
-
-    @JsonProperty
-    @JsonInclude(JsonInclude.Include.NON_NULL)
-    final JsonReceiptMessage receiptMessage;
-
-    @JsonProperty
-    @JsonInclude(JsonInclude.Include.NON_NULL)
-    final JsonTypingMessage typingMessage;
-
-    public JsonMessageEnvelope(
+    public static JsonMessageEnvelope from(
             SignalServiceEnvelope envelope, SignalServiceContent content, Throwable exception, Manager m
     ) {
+        final String source;
+        final String sourceNumber;
+        final String sourceUuid;
+        final Integer sourceDevice;
         if (!envelope.isUnidentifiedSender() && envelope.hasSourceUuid()) {
-            var source = m.resolveSignalServiceAddress(envelope.getSourceAddress());
-            this.source = getLegacyIdentifier(source);
-            this.sourceNumber = source.getNumber().orNull();
-            this.sourceUuid = source.getUuid().toString();
-            this.sourceDevice = envelope.getSourceDevice();
+            final var sourceAddress = m.resolveSignalServiceAddress(envelope.getSourceAddress());
+            source = getLegacyIdentifier(sourceAddress);
+            sourceNumber = sourceAddress.getNumber().orNull();
+            sourceUuid = sourceAddress.getUuid().toString();
+            sourceDevice = envelope.getSourceDevice();
         } else if (envelope.isUnidentifiedSender() && content != null) {
-            final var source = m.resolveSignalServiceAddress(content.getSender());
-            this.source = getLegacyIdentifier(source);
-            this.sourceNumber = source.getNumber().orNull();
-            this.sourceUuid = source.getUuid().toString();
-            this.sourceDevice = content.getSenderDevice();
+            final var sender = m.resolveSignalServiceAddress(content.getSender());
+            source = getLegacyIdentifier(sender);
+            sourceNumber = sender.getNumber().orNull();
+            sourceUuid = sender.getUuid().toString();
+            sourceDevice = content.getSenderDevice();
         } else if (exception instanceof UntrustedIdentityException e) {
-            final var source = m.resolveSignalServiceAddress(e.getSender());
-            this.source = getLegacyIdentifier(source);
-            this.sourceNumber = source.getNumber().orNull();
-            this.sourceUuid = source.getUuid().toString();
-            this.sourceDevice = e.getSenderDevice();
+            final var sender = m.resolveSignalServiceAddress(e.getSender());
+            source = getLegacyIdentifier(sender);
+            sourceNumber = sender.getNumber().orNull();
+            sourceUuid = sender.getUuid().toString();
+            sourceDevice = e.getSenderDevice();
         } else {
-            this.source = null;
-            this.sourceNumber = null;
-            this.sourceUuid = null;
-            this.sourceDevice = null;
+            source = null;
+            sourceNumber = null;
+            sourceUuid = null;
+            sourceDevice = null;
         }
         String name;
         try {
-            name = m.getContactOrProfileName(RecipientIdentifier.Single.fromString(this.source, m.getSelfNumber()));
+            name = m.getContactOrProfileName(RecipientIdentifier.Single.fromString(source, m.getSelfNumber()));
         } catch (InvalidNumberException | NullPointerException e) {
             name = null;
         }
-        this.sourceName = name;
-        this.timestamp = envelope.getTimestamp();
+        final var sourceName = name;
+        final var timestamp = envelope.getTimestamp();
+        final JsonReceiptMessage receiptMessage;
         if (envelope.isReceipt()) {
-            this.receiptMessage = JsonReceiptMessage.deliveryReceipt(timestamp, List.of(timestamp));
+            receiptMessage = JsonReceiptMessage.deliveryReceipt(timestamp, List.of(timestamp));
         } else if (content != null && content.getReceiptMessage().isPresent()) {
-            this.receiptMessage = new JsonReceiptMessage(content.getReceiptMessage().get());
+            receiptMessage = JsonReceiptMessage.from(content.getReceiptMessage().get());
         } else {
-            this.receiptMessage = null;
+            receiptMessage = null;
         }
-        this.typingMessage = content != null && content.getTypingMessage().isPresent()
-                ? new JsonTypingMessage(content.getTypingMessage().get())
+        final var typingMessage = content != null && content.getTypingMessage().isPresent() ? JsonTypingMessage.from(
+                content.getTypingMessage().get()) : null;
+
+        final var dataMessage = content != null && content.getDataMessage().isPresent()
+                ? JsonDataMessage.from(content.getDataMessage().get(), m)
+                : null;
+        final var syncMessage = content != null && content.getSyncMessage().isPresent()
+                ? JsonSyncMessage.from(content.getSyncMessage().get(), m)
+                : null;
+        final var callMessage = content != null && content.getCallMessage().isPresent()
+                ? JsonCallMessage.from(content.getCallMessage().get())
                 : null;
 
-        this.dataMessage = content != null && content.getDataMessage().isPresent()
-                ? new JsonDataMessage(content.getDataMessage().get(), m)
-                : null;
-        this.syncMessage = content != null && content.getSyncMessage().isPresent()
-                ? new JsonSyncMessage(content.getSyncMessage().get(), m)
-                : null;
-        this.callMessage = content != null && content.getCallMessage().isPresent()
-                ? new JsonCallMessage(content.getCallMessage().get())
-                : null;
+        return new JsonMessageEnvelope(source,
+                sourceNumber,
+                sourceUuid,
+                sourceName,
+                sourceDevice,
+                timestamp,
+                dataMessage,
+                syncMessage,
+                callMessage,
+                receiptMessage,
+                typingMessage);
     }
 
-    public JsonMessageEnvelope(Signal.MessageReceived messageReceived) {
-        source = messageReceived.getSender();
-        sourceNumber = null;
-        sourceUuid = null;
-        sourceName = null;
-        sourceDevice = null;
-        timestamp = messageReceived.getTimestamp();
-        receiptMessage = null;
-        dataMessage = new JsonDataMessage(messageReceived);
-        syncMessage = null;
-        callMessage = null;
-        typingMessage = null;
+    public static JsonMessageEnvelope from(Signal.MessageReceived messageReceived) {
+        return new JsonMessageEnvelope(messageReceived.getSource(),
+                null,
+                null,
+                null,
+                null,
+                messageReceived.getTimestamp(),
+                JsonDataMessage.from(messageReceived),
+                null,
+                null,
+                null,
+                null);
     }
 
-    public JsonMessageEnvelope(Signal.ReceiptReceived receiptReceived) {
-        source = receiptReceived.getSender();
-        sourceNumber = null;
-        sourceUuid = null;
-        sourceName = null;
-        sourceDevice = null;
-        timestamp = receiptReceived.getTimestamp();
-        receiptMessage = JsonReceiptMessage.deliveryReceipt(timestamp, List.of(timestamp));
-        dataMessage = null;
-        syncMessage = null;
-        callMessage = null;
-        typingMessage = null;
+    public static JsonMessageEnvelope from(Signal.ReceiptReceived receiptReceived) {
+        return new JsonMessageEnvelope(receiptReceived.getSender(),
+                null,
+                null,
+                null,
+                null,
+                receiptReceived.getTimestamp(),
+                null,
+                null,
+                null,
+                JsonReceiptMessage.deliveryReceipt(receiptReceived.getTimestamp(),
+                        List.of(receiptReceived.getTimestamp())),
+                null);
     }
 
-    public JsonMessageEnvelope(Signal.SyncMessageReceived messageReceived) {
-        source = messageReceived.getSource();
-        sourceNumber = null;
-        sourceUuid = null;
-        sourceName = null;
-        sourceDevice = null;
-        timestamp = messageReceived.getTimestamp();
-        receiptMessage = null;
-        dataMessage = null;
-        syncMessage = new JsonSyncMessage(messageReceived);
-        callMessage = null;
-        typingMessage = null;
+    public static JsonMessageEnvelope from(Signal.SyncMessageReceived messageReceived) {
+        return new JsonMessageEnvelope(messageReceived.getSource(),
+                null,
+                null,
+                null,
+                null,
+                messageReceived.getTimestamp(),
+                null,
+                JsonSyncMessage.from(messageReceived),
+                null,
+                null,
+                null);
     }
 }
diff --git a/src/main/java/org/asamk/signal/json/JsonQuote.java b/src/main/java/org/asamk/signal/json/JsonQuote.java
index 73af895a..f0d1831c 100644
--- a/src/main/java/org/asamk/signal/json/JsonQuote.java
+++ b/src/main/java/org/asamk/signal/json/JsonQuote.java
@@ -1,7 +1,6 @@
 package org.asamk.signal.json;
 
 import com.fasterxml.jackson.annotation.JsonInclude;
-import com.fasterxml.jackson.annotation.JsonProperty;
 
 import org.asamk.signal.manager.Manager;
 import org.whispersystems.signalservice.api.messages.SignalServiceDataMessage;
@@ -12,55 +11,41 @@ import java.util.stream.Collectors;
 
 import static org.asamk.signal.util.Util.getLegacyIdentifier;
 
-public class JsonQuote {
+public record JsonQuote(
+        long id,
+        @Deprecated String author,
+        String authorNumber,
+        String authorUuid,
+        String text,
+        @JsonInclude(JsonInclude.Include.NON_NULL) List<JsonMention> mentions,
+        List<JsonQuotedAttachment> attachments
+) {
 
-    @JsonProperty
-    final long id;
-
-    @JsonProperty
-    @Deprecated
-    final String author;
-
-    @JsonProperty
-    final String authorNumber;
-
-    @JsonProperty
-    final String authorUuid;
-
-    @JsonProperty
-    final String text;
-
-    @JsonProperty
-    @JsonInclude(JsonInclude.Include.NON_NULL)
-    final List<JsonMention> mentions;
-
-    @JsonProperty
-    final List<JsonQuotedAttachment> attachments;
-
-    JsonQuote(SignalServiceDataMessage.Quote quote, Manager m) {
-        this.id = quote.getId();
+    static JsonQuote from(SignalServiceDataMessage.Quote quote, Manager m) {
+        final var id = quote.getId();
         final var address = m.resolveSignalServiceAddress(quote.getAuthor());
-        this.author = getLegacyIdentifier(address);
-        this.authorNumber = address.getNumber().orNull();
-        this.authorUuid = address.getUuid().toString();
-        this.text = quote.getText();
+        final var author = getLegacyIdentifier(address);
+        final var authorNumber = address.getNumber().orNull();
+        final var authorUuid = address.getUuid().toString();
+        final var text = quote.getText();
 
+        final List<JsonMention> mentions;
         if (quote.getMentions() != null && quote.getMentions().size() > 0) {
-            this.mentions = quote.getMentions()
+            mentions = quote.getMentions()
                     .stream()
-                    .map(quotedMention -> new JsonMention(quotedMention, m))
+                    .map(quotedMention -> JsonMention.from(quotedMention, m))
                     .collect(Collectors.toList());
         } else {
-            this.mentions = null;
+            mentions = null;
         }
 
+        final List<JsonQuotedAttachment> attachments;
         if (quote.getAttachments().size() > 0) {
-            this.attachments = quote.getAttachments()
-                    .stream()
-                    .map(JsonQuotedAttachment::new)
-                    .collect(Collectors.toList());
+            attachments = quote.getAttachments().stream().map(JsonQuotedAttachment::from).collect(Collectors.toList());
         } else {
-            this.attachments = new ArrayList<>();
+            attachments = new ArrayList<>();
         }
+
+        return new JsonQuote(id, author, authorNumber, authorUuid, text, mentions, attachments);
     }
 }
diff --git a/src/main/java/org/asamk/signal/json/JsonQuotedAttachment.java b/src/main/java/org/asamk/signal/json/JsonQuotedAttachment.java
index f3f809dc..a72ba7c6 100644
--- a/src/main/java/org/asamk/signal/json/JsonQuotedAttachment.java
+++ b/src/main/java/org/asamk/signal/json/JsonQuotedAttachment.java
@@ -1,29 +1,22 @@
 package org.asamk.signal.json;
 
 import com.fasterxml.jackson.annotation.JsonInclude;
-import com.fasterxml.jackson.annotation.JsonProperty;
 
 import org.whispersystems.signalservice.api.messages.SignalServiceDataMessage;
 
-public class JsonQuotedAttachment {
+public record JsonQuotedAttachment(
+        String contentType, String filename, @JsonInclude(JsonInclude.Include.NON_NULL) JsonAttachment thumbnail
+) {
 
-    @JsonProperty
-    final String contentType;
-
-    @JsonProperty
-    final String filename;
-
-    @JsonProperty
-    @JsonInclude(JsonInclude.Include.NON_NULL)
-    final JsonAttachment thumbnail;
-
-    JsonQuotedAttachment(SignalServiceDataMessage.Quote.QuotedAttachment quotedAttachment) {
-        contentType = quotedAttachment.getContentType();
-        filename = quotedAttachment.getFileName();
+    static JsonQuotedAttachment from(SignalServiceDataMessage.Quote.QuotedAttachment quotedAttachment) {
+        final var contentType = quotedAttachment.getContentType();
+        final var filename = quotedAttachment.getFileName();
+        final JsonAttachment thumbnail;
         if (quotedAttachment.getThumbnail() != null) {
-            thumbnail = new JsonAttachment(quotedAttachment.getThumbnail());
+            thumbnail = JsonAttachment.from(quotedAttachment.getThumbnail());
         } else {
             thumbnail = null;
         }
+        return new JsonQuotedAttachment(contentType, filename, thumbnail);
     }
 }
diff --git a/src/main/java/org/asamk/signal/json/JsonReaction.java b/src/main/java/org/asamk/signal/json/JsonReaction.java
index cc80ee84..9dc64591 100644
--- a/src/main/java/org/asamk/signal/json/JsonReaction.java
+++ b/src/main/java/org/asamk/signal/json/JsonReaction.java
@@ -1,40 +1,32 @@
 package org.asamk.signal.json;
 
-import com.fasterxml.jackson.annotation.JsonProperty;
-
 import org.asamk.signal.manager.Manager;
 import org.whispersystems.signalservice.api.messages.SignalServiceDataMessage.Reaction;
 
 import static org.asamk.signal.util.Util.getLegacyIdentifier;
 
-public class JsonReaction {
+public record JsonReaction(
+        String emoji,
+        @Deprecated String targetAuthor,
+        String targetAuthorNumber,
+        String targetAuthorUuid,
+        long targetSentTimestamp,
+        boolean isRemove
+) {
 
-    @JsonProperty
-    final String emoji;
-
-    @JsonProperty
-    @Deprecated
-    final String targetAuthor;
-
-    @JsonProperty
-    final String targetAuthorNumber;
-
-    @JsonProperty
-    final String targetAuthorUuid;
-
-    @JsonProperty
-    final long targetSentTimestamp;
-
-    @JsonProperty
-    final boolean isRemove;
-
-    JsonReaction(Reaction reaction, Manager m) {
-        this.emoji = reaction.getEmoji();
+    static JsonReaction from(Reaction reaction, Manager m) {
+        final var emoji = reaction.getEmoji();
         final var address = m.resolveSignalServiceAddress(reaction.getTargetAuthor());
-        this.targetAuthor = getLegacyIdentifier(address);
-        this.targetAuthorNumber = address.getNumber().orNull();
-        this.targetAuthorUuid = address.getUuid().toString();
-        this.targetSentTimestamp = reaction.getTargetSentTimestamp();
-        this.isRemove = reaction.isRemove();
+        final var targetAuthor = getLegacyIdentifier(address);
+        final var targetAuthorNumber = address.getNumber().orNull();
+        final var targetAuthorUuid = address.getUuid().toString();
+        final var targetSentTimestamp = reaction.getTargetSentTimestamp();
+        final var isRemove = reaction.isRemove();
+        return new JsonReaction(emoji,
+                targetAuthor,
+                targetAuthorNumber,
+                targetAuthorUuid,
+                targetSentTimestamp,
+                isRemove);
     }
 }
diff --git a/src/main/java/org/asamk/signal/json/JsonReceiptMessage.java b/src/main/java/org/asamk/signal/json/JsonReceiptMessage.java
index e32009e1..af7050b1 100644
--- a/src/main/java/org/asamk/signal/json/JsonReceiptMessage.java
+++ b/src/main/java/org/asamk/signal/json/JsonReceiptMessage.java
@@ -1,39 +1,17 @@
 package org.asamk.signal.json;
 
-import com.fasterxml.jackson.annotation.JsonProperty;
-
 import org.whispersystems.signalservice.api.messages.SignalServiceReceiptMessage;
 
 import java.util.List;
 
-class JsonReceiptMessage {
+record JsonReceiptMessage(long when, boolean isDelivery, boolean isRead, List<Long> timestamps) {
 
-    @JsonProperty
-    final long when;
-
-    @JsonProperty
-    final boolean isDelivery;
-
-    @JsonProperty
-    final boolean isRead;
-
-    @JsonProperty
-    final List<Long> timestamps;
-
-    JsonReceiptMessage(SignalServiceReceiptMessage receiptMessage) {
-        this.when = receiptMessage.getWhen();
-        this.isDelivery = receiptMessage.isDeliveryReceipt();
-        this.isRead = receiptMessage.isReadReceipt();
-        this.timestamps = receiptMessage.getTimestamps();
-    }
-
-    private JsonReceiptMessage(
-            final long when, final boolean isDelivery, final boolean isRead, final List<Long> timestamps
-    ) {
-        this.when = when;
-        this.isDelivery = isDelivery;
-        this.isRead = isRead;
-        this.timestamps = timestamps;
+    static JsonReceiptMessage from(SignalServiceReceiptMessage receiptMessage) {
+        final var when = receiptMessage.getWhen();
+        final var isDelivery = receiptMessage.isDeliveryReceipt();
+        final var isRead = receiptMessage.isReadReceipt();
+        final var timestamps = receiptMessage.getTimestamps();
+        return new JsonReceiptMessage(when, isDelivery, isRead, timestamps);
     }
 
     static JsonReceiptMessage deliveryReceipt(final long when, final List<Long> timestamps) {
diff --git a/src/main/java/org/asamk/signal/json/JsonRemoteDelete.java b/src/main/java/org/asamk/signal/json/JsonRemoteDelete.java
index a498a0e5..611d1141 100644
--- a/src/main/java/org/asamk/signal/json/JsonRemoteDelete.java
+++ b/src/main/java/org/asamk/signal/json/JsonRemoteDelete.java
@@ -1,15 +1,10 @@
 package org.asamk.signal.json;
 
-import com.fasterxml.jackson.annotation.JsonProperty;
-
 import org.whispersystems.signalservice.api.messages.SignalServiceDataMessage;
 
-class JsonRemoteDelete {
+record JsonRemoteDelete(long timestamp) {
 
-    @JsonProperty
-    final long timestamp;
-
-    JsonRemoteDelete(SignalServiceDataMessage.RemoteDelete remoteDelete) {
-        this.timestamp = remoteDelete.getTargetSentTimestamp();
+    static JsonRemoteDelete from(SignalServiceDataMessage.RemoteDelete remoteDelete) {
+        return new JsonRemoteDelete(remoteDelete.getTargetSentTimestamp());
     }
 }
diff --git a/src/main/java/org/asamk/signal/json/JsonSharedContact.java b/src/main/java/org/asamk/signal/json/JsonSharedContact.java
index ea15b574..f52be3eb 100644
--- a/src/main/java/org/asamk/signal/json/JsonSharedContact.java
+++ b/src/main/java/org/asamk/signal/json/JsonSharedContact.java
@@ -1,62 +1,45 @@
 package org.asamk.signal.json;
 
 import com.fasterxml.jackson.annotation.JsonInclude;
-import com.fasterxml.jackson.annotation.JsonProperty;
 
 import org.whispersystems.signalservice.api.messages.shared.SharedContact;
 
 import java.util.List;
 import java.util.stream.Collectors;
 
-public class JsonSharedContact {
+public record JsonSharedContact(
+        JsonContactName name,
+        JsonContactAvatar avatar,
+        @JsonInclude(JsonInclude.Include.NON_NULL) List<JsonContactPhone> phone,
+        @JsonInclude(JsonInclude.Include.NON_NULL) List<JsonContactEmail> email,
+        @JsonInclude(JsonInclude.Include.NON_NULL) List<JsonContactAddress> address,
+        String organization
+) {
 
-    @JsonProperty
-    final JsonContactName name;
+    static JsonSharedContact from(SharedContact contact) {
+        final var name = JsonContactName.from(contact.getName());
+        final var avatar = contact.getAvatar().isPresent() ? JsonContactAvatar.from(contact.getAvatar().get()) : null;
 
-    @JsonProperty
-    final JsonContactAvatar avatar;
+        final var phone = contact.getPhone().isPresent() ? contact.getPhone()
+                .get()
+                .stream()
+                .map(JsonContactPhone::from)
+                .collect(Collectors.toList()) : null;
 
-    @JsonProperty
-    @JsonInclude(JsonInclude.Include.NON_NULL)
-    final List<JsonContactPhone> phone;
+        final var email = contact.getEmail().isPresent() ? contact.getEmail()
+                .get()
+                .stream()
+                .map(JsonContactEmail::from)
+                .collect(Collectors.toList()) : null;
 
-    @JsonProperty
-    @JsonInclude(JsonInclude.Include.NON_NULL)
-    final List<JsonContactEmail> email;
+        final var address = contact.getAddress().isPresent() ? contact.getAddress()
+                .get()
+                .stream()
+                .map(JsonContactAddress::from)
+                .collect(Collectors.toList()) : null;
 
-    @JsonProperty
-    @JsonInclude(JsonInclude.Include.NON_NULL)
-    final List<JsonContactAddress> address;
+        final var organization = contact.getOrganization().orNull();
 
-    @JsonProperty
-    final String organization;
-
-    public JsonSharedContact(SharedContact contact) {
-        name = new JsonContactName(contact.getName());
-        if (contact.getAvatar().isPresent()) {
-            avatar = new JsonContactAvatar(contact.getAvatar().get());
-        } else {
-            avatar = null;
-        }
-
-        if (contact.getPhone().isPresent()) {
-            phone = contact.getPhone().get().stream().map(JsonContactPhone::new).collect(Collectors.toList());
-        } else {
-            phone = null;
-        }
-
-        if (contact.getEmail().isPresent()) {
-            email = contact.getEmail().get().stream().map(JsonContactEmail::new).collect(Collectors.toList());
-        } else {
-            email = null;
-        }
-
-        if (contact.getAddress().isPresent()) {
-            address = contact.getAddress().get().stream().map(JsonContactAddress::new).collect(Collectors.toList());
-        } else {
-            address = null;
-        }
-
-        organization = contact.getOrganization().orNull();
+        return new JsonSharedContact(name, avatar, phone, email, address, organization);
     }
 }
diff --git a/src/main/java/org/asamk/signal/json/JsonSticker.java b/src/main/java/org/asamk/signal/json/JsonSticker.java
index e56ddf3f..9278ee37 100644
--- a/src/main/java/org/asamk/signal/json/JsonSticker.java
+++ b/src/main/java/org/asamk/signal/json/JsonSticker.java
@@ -1,25 +1,15 @@
 package org.asamk.signal.json;
 
-import com.fasterxml.jackson.annotation.JsonProperty;
-
 import org.whispersystems.signalservice.api.messages.SignalServiceDataMessage;
 
 import java.util.Base64;
 
-public class JsonSticker {
+public record JsonSticker(String packId, String packKey, int stickerId) {
 
-    @JsonProperty
-    final String packId;
-
-    @JsonProperty
-    final String packKey;
-
-    @JsonProperty
-    final int stickerId;
-
-    public JsonSticker(SignalServiceDataMessage.Sticker sticker) {
-        this.packId = Base64.getEncoder().encodeToString(sticker.getPackId());
-        this.packKey = Base64.getEncoder().encodeToString(sticker.getPackKey());
-        this.stickerId = sticker.getStickerId();
+    static JsonSticker from(SignalServiceDataMessage.Sticker sticker) {
+        final var packId = Base64.getEncoder().encodeToString(sticker.getPackId());
+        final var packKey = Base64.getEncoder().encodeToString(sticker.getPackKey());
+        final var stickerId = sticker.getStickerId();
+        return new JsonSticker(packId, packKey, stickerId);
     }
 }
diff --git a/src/main/java/org/asamk/signal/json/JsonSyncDataMessage.java b/src/main/java/org/asamk/signal/json/JsonSyncDataMessage.java
index e2c92bac..98139c84 100644
--- a/src/main/java/org/asamk/signal/json/JsonSyncDataMessage.java
+++ b/src/main/java/org/asamk/signal/json/JsonSyncDataMessage.java
@@ -1,6 +1,6 @@
 package org.asamk.signal.json;
 
-import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonUnwrapped;
 
 import org.asamk.Signal;
 import org.asamk.signal.manager.Manager;
@@ -8,37 +8,30 @@ import org.whispersystems.signalservice.api.messages.multidevice.SentTranscriptM
 
 import static org.asamk.signal.util.Util.getLegacyIdentifier;
 
-class JsonSyncDataMessage extends JsonDataMessage {
-
-    @JsonProperty
-    @Deprecated
-    final String destination;
-
-    @JsonProperty
-    final String destinationNumber;
-
-    @JsonProperty
-    final String destinationUuid;
-
-    JsonSyncDataMessage(SentTranscriptMessage transcriptMessage, Manager m) {
-        super(transcriptMessage.getMessage(), m);
+record JsonSyncDataMessage(
+        @Deprecated String destination,
+        String destinationNumber,
+        String destinationUuid,
+        @JsonUnwrapped JsonDataMessage dataMessage
+) {
 
+    static JsonSyncDataMessage from(SentTranscriptMessage transcriptMessage, Manager m) {
         if (transcriptMessage.getDestination().isPresent()) {
             final var address = transcriptMessage.getDestination().get();
-            this.destination = getLegacyIdentifier(address);
-            this.destinationNumber = address.getNumber().orNull();
-            this.destinationUuid = address.getUuid().toString();
+            return new JsonSyncDataMessage(getLegacyIdentifier(address),
+                    address.getNumber().orNull(),
+                    address.getUuid().toString(),
+                    JsonDataMessage.from(transcriptMessage.getMessage(), m));
+
         } else {
-            this.destination = null;
-            this.destinationNumber = null;
-            this.destinationUuid = null;
+            return new JsonSyncDataMessage(null, null, null, JsonDataMessage.from(transcriptMessage.getMessage(), m));
         }
     }
 
-    JsonSyncDataMessage(Signal.SyncMessageReceived messageReceived) {
-        super(messageReceived);
-        this.destination = messageReceived.getDestination();
-        this.destinationNumber = null;
-        this.destinationUuid = null;
+    static JsonSyncDataMessage from(Signal.SyncMessageReceived messageReceived) {
+        return new JsonSyncDataMessage(messageReceived.getDestination(),
+                null,
+                null,
+                JsonDataMessage.from(messageReceived));
     }
 }
diff --git a/src/main/java/org/asamk/signal/json/JsonSyncMessage.java b/src/main/java/org/asamk/signal/json/JsonSyncMessage.java
index 5c951f0f..2628844f 100644
--- a/src/main/java/org/asamk/signal/json/JsonSyncMessage.java
+++ b/src/main/java/org/asamk/signal/json/JsonSyncMessage.java
@@ -1,7 +1,6 @@
 package org.asamk.signal.json;
 
 import com.fasterxml.jackson.annotation.JsonInclude;
-import com.fasterxml.jackson.annotation.JsonProperty;
 
 import org.asamk.Signal;
 import org.asamk.signal.manager.Manager;
@@ -18,76 +17,72 @@ enum JsonSyncMessageType {
     REQUEST_SYNC
 }
 
-class JsonSyncMessage {
+record JsonSyncMessage(
+        @JsonInclude(JsonInclude.Include.NON_NULL) JsonSyncDataMessage sentMessage,
+        @JsonInclude(JsonInclude.Include.NON_NULL) List<String> blockedNumbers,
+        @JsonInclude(JsonInclude.Include.NON_NULL) List<String> blockedGroupIds,
+        @JsonInclude(JsonInclude.Include.NON_NULL) List<JsonSyncReadMessage> readMessages,
+        @JsonInclude(JsonInclude.Include.NON_NULL) JsonSyncMessageType type
+) {
 
-    @JsonProperty
-    @JsonInclude(JsonInclude.Include.NON_NULL)
-    final JsonSyncDataMessage sentMessage;
+    JsonSyncMessage(
+            final JsonSyncDataMessage sentMessage,
+            final List<String> blockedNumbers,
+            final List<String> blockedGroupIds,
+            final List<JsonSyncReadMessage> readMessages,
+            final JsonSyncMessageType type
+    ) {
+        this.sentMessage = sentMessage;
+        this.blockedNumbers = blockedNumbers;
+        this.blockedGroupIds = blockedGroupIds;
+        this.readMessages = readMessages;
+        this.type = type;
+    }
 
-    @JsonProperty
-    @JsonInclude(JsonInclude.Include.NON_NULL)
-    final List<String> blockedNumbers;
-
-    @JsonProperty
-    @JsonInclude(JsonInclude.Include.NON_NULL)
-    final List<String> blockedGroupIds;
-
-    @JsonProperty
-    @JsonInclude(JsonInclude.Include.NON_NULL)
-    final List<JsonSyncReadMessage> readMessages;
-
-    @JsonProperty
-    @JsonInclude(JsonInclude.Include.NON_NULL)
-    final JsonSyncMessageType type;
-
-    JsonSyncMessage(SignalServiceSyncMessage syncMessage, Manager m) {
-        this.sentMessage = syncMessage.getSent().isPresent()
-                ? new JsonSyncDataMessage(syncMessage.getSent().get(), m)
-                : null;
+    static JsonSyncMessage from(SignalServiceSyncMessage syncMessage, Manager m) {
+        final var sentMessage = syncMessage.getSent().isPresent() ? JsonSyncDataMessage.from(syncMessage.getSent()
+                .get(), m) : null;
+        final List<String> blockedNumbers;
+        final List<String> blockedGroupIds;
         if (syncMessage.getBlockedList().isPresent()) {
             final var base64 = Base64.getEncoder();
-            this.blockedNumbers = syncMessage.getBlockedList()
+            blockedNumbers = syncMessage.getBlockedList()
                     .get()
                     .getAddresses()
                     .stream()
                     .map(Util::getLegacyIdentifier)
                     .collect(Collectors.toList());
-            this.blockedGroupIds = syncMessage.getBlockedList()
+            blockedGroupIds = syncMessage.getBlockedList()
                     .get()
                     .getGroupIds()
                     .stream()
                     .map(base64::encodeToString)
                     .collect(Collectors.toList());
         } else {
-            this.blockedNumbers = null;
-            this.blockedGroupIds = null;
-        }
-        if (syncMessage.getRead().isPresent()) {
-            this.readMessages = syncMessage.getRead()
-                    .get()
-                    .stream()
-                    .map(JsonSyncReadMessage::new)
-                    .collect(Collectors.toList());
-        } else {
-            this.readMessages = null;
+            blockedNumbers = null;
+            blockedGroupIds = null;
         }
 
+        final var readMessages = syncMessage.getRead().isPresent() ? syncMessage.getRead()
+                .get()
+                .stream()
+                .map(JsonSyncReadMessage::from)
+                .collect(Collectors.toList()) : null;
+
+        final JsonSyncMessageType type;
         if (syncMessage.getContacts().isPresent()) {
-            this.type = JsonSyncMessageType.CONTACTS_SYNC;
+            type = JsonSyncMessageType.CONTACTS_SYNC;
         } else if (syncMessage.getGroups().isPresent()) {
-            this.type = JsonSyncMessageType.GROUPS_SYNC;
+            type = JsonSyncMessageType.GROUPS_SYNC;
         } else if (syncMessage.getRequest().isPresent()) {
-            this.type = JsonSyncMessageType.REQUEST_SYNC;
+            type = JsonSyncMessageType.REQUEST_SYNC;
         } else {
-            this.type = null;
+            type = null;
         }
+        return new JsonSyncMessage(sentMessage, blockedNumbers, blockedGroupIds, readMessages, type);
     }
 
-    JsonSyncMessage(Signal.SyncMessageReceived messageReceived) {
-        this.sentMessage = new JsonSyncDataMessage(messageReceived);
-        this.blockedNumbers = null;
-        this.blockedGroupIds = null;
-        this.readMessages = null;
-        this.type = null;
+    static JsonSyncMessage from(Signal.SyncMessageReceived messageReceived) {
+        return new JsonSyncMessage(JsonSyncDataMessage.from(messageReceived), null, null, null, null);
     }
 }
diff --git a/src/main/java/org/asamk/signal/json/JsonSyncReadMessage.java b/src/main/java/org/asamk/signal/json/JsonSyncReadMessage.java
index 042ed7e4..05cb48f3 100644
--- a/src/main/java/org/asamk/signal/json/JsonSyncReadMessage.java
+++ b/src/main/java/org/asamk/signal/json/JsonSyncReadMessage.java
@@ -1,31 +1,19 @@
 package org.asamk.signal.json;
 
-import com.fasterxml.jackson.annotation.JsonProperty;
-
 import org.whispersystems.signalservice.api.messages.multidevice.ReadMessage;
 
 import static org.asamk.signal.util.Util.getLegacyIdentifier;
 
-class JsonSyncReadMessage {
+record JsonSyncReadMessage(
+        @Deprecated String sender, String senderNumber, String senderUuid, long timestamp
+) {
 
-    @JsonProperty
-    @Deprecated
-    final String sender;
-
-    @JsonProperty
-    final String senderNumber;
-
-    @JsonProperty
-    final String senderUuid;
-
-    @JsonProperty
-    final long timestamp;
-
-    public JsonSyncReadMessage(final ReadMessage readMessage) {
-        final var sender = readMessage.getSender();
-        this.sender = getLegacyIdentifier(sender);
-        this.senderNumber = sender.getNumber().orNull();
-        this.senderUuid = sender.getUuid().toString();
-        this.timestamp = readMessage.getTimestamp();
+    static JsonSyncReadMessage from(final ReadMessage readMessage) {
+        final var senderAddress = readMessage.getSender();
+        final var sender = getLegacyIdentifier(senderAddress);
+        final var senderNumber = senderAddress.getNumber().orNull();
+        final var senderUuid = senderAddress.getUuid().toString();
+        final var timestamp = readMessage.getTimestamp();
+        return new JsonSyncReadMessage(sender, senderNumber, senderUuid, timestamp);
     }
 }
diff --git a/src/main/java/org/asamk/signal/json/JsonTypingMessage.java b/src/main/java/org/asamk/signal/json/JsonTypingMessage.java
index 7e3b1a44..b231d67e 100644
--- a/src/main/java/org/asamk/signal/json/JsonTypingMessage.java
+++ b/src/main/java/org/asamk/signal/json/JsonTypingMessage.java
@@ -1,28 +1,26 @@
 package org.asamk.signal.json;
 
 import com.fasterxml.jackson.annotation.JsonInclude;
-import com.fasterxml.jackson.annotation.JsonProperty;
 
 import org.whispersystems.signalservice.api.messages.SignalServiceTypingMessage;
 
 import java.util.Base64;
 
-class JsonTypingMessage {
+record JsonTypingMessage(
+        String action, long timestamp, @JsonInclude(JsonInclude.Include.NON_NULL) String groupId
+) {
 
-    @JsonProperty
-    final String action;
+    JsonTypingMessage(final String action, final long timestamp, final String groupId) {
+        this.action = action;
+        this.timestamp = timestamp;
+        this.groupId = groupId;
+    }
 
-    @JsonProperty
-    final long timestamp;
-
-    @JsonProperty
-    @JsonInclude(JsonInclude.Include.NON_NULL)
-    final String groupId;
-
-    JsonTypingMessage(SignalServiceTypingMessage typingMessage) {
-        this.action = typingMessage.getAction().name();
-        this.timestamp = typingMessage.getTimestamp();
+    static JsonTypingMessage from(SignalServiceTypingMessage typingMessage) {
+        final var action = typingMessage.getAction().name();
+        final var timestamp = typingMessage.getTimestamp();
         final var encoder = Base64.getEncoder();
-        this.groupId = typingMessage.getGroupId().transform(encoder::encodeToString).orNull();
+        final var groupId = typingMessage.getGroupId().transform(encoder::encodeToString).orNull();
+        return new JsonTypingMessage(action, timestamp, groupId);
     }
 }