fix all analysis warnings.

bin/kdbx.dart

@@ -5,8 +5,6 @@ import 'package:argon2_ffi_base/argon2_ffi_base.dart';
 import 'package:args/args.dart';
 import 'package:args/command_runner.dart';
 import 'package:kdbx/kdbx.dart';
-import 'package:kdbx/src/crypto/protected_value.dart';
-import 'package:kdbx/src/kdbx_format.dart';
 import 'package:kdbx/src/utils/print_utils.dart';
 import 'package:logging/logging.dart';
 import 'package:logging_appenders/logging_appenders.dart';

example/pubspec.lock

@@ -7,14 +7,14 @@ packages:
       name: archive
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.13"
+    version: "3.1.2"
   argon2_ffi_base:
     dependency: transitive
     description:
       name: argon2_ffi_base
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.4+6"
+    version: "1.0.0+2"
   args:
     dependency: transitive
     description:
@@ -28,21 +28,21 @@ packages:
       name: charcode
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.3"
+    version: "1.2.0"
   clock:
     dependency: transitive
     description:
       name: clock
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.1"
+    version: "1.1.0"
   collection:
     dependency: transitive
     description:
       name: collection
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.14.13"
+    version: "1.15.0"
   convert:
     dependency: transitive
     description:
@@ -56,77 +56,63 @@ packages:
       name: crypto
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.5"
+    version: "3.0.1"
-  cryptography:
-    dependency: transitive
-    description:
-      name: cryptography
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.1.2"
   dio:
     dependency: transitive
     description:
       name: dio
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.0.10"
+    version: "4.0.0"
   ffi:
     dependency: transitive
     description:
       name: ffi
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.3"
+    version: "1.0.0"
   http_parser:
     dependency: transitive
     description:
       name: http_parser
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.1.4"
+    version: "4.0.0"
   intl:
     dependency: transitive
     description:
       name: intl
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.16.1"
+    version: "0.17.0"
-  io:
+  isolates:
-    dependency: transitive
-    description:
-      name: io
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.3.4"
-  isolate:
     dependency: transitive
     description:
-      name: isolate
+      name: isolates
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.3"
+    version: "3.0.3+8"
   kdbx:
     dependency: "direct main"
     description:
       path: ".."
       relative: true
     source: path
-    version: "0.4.1"
+    version: "1.0.0"
   logging:
     dependency: transitive
     description:
       name: logging
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.11.4"
+    version: "1.0.1"
   logging_appenders:
     dependency: transitive
     description:
       name: logging_appenders
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.4.2+5"
+    version: "1.0.0"
   matcher:
     dependency: transitive
     description:
@@ -140,14 +126,14 @@ packages:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.2"
+    version: "1.3.0"
   path:
     dependency: transitive
     description:
       name: path
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.7.0"
+    version: "1.8.0"
   pedantic:
     dependency: "direct dev"
     description:
@@ -168,14 +154,7 @@ packages:
       name: pointycastle
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.2"
+    version: "3.0.1"
-  prompts:
-    dependency: transitive
-    description:
-      name: prompts
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.3.1"
   quiver:
     dependency: transitive
     description:
@@ -183,20 +162,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.1.3"
-  rxdart:
-    dependency: transitive
-    description:
-      name: rxdart
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.24.1"
   source_span:
     dependency: transitive
     description:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.7.0"
+    version: "1.8.1"
   stack_trace:
     dependency: transitive
     description:
@@ -210,28 +182,42 @@ packages:
       name: string_scanner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.5"
+    version: "1.1.0"
+  supercharged_dart:
+    dependency: transitive
+    description:
+      name: supercharged_dart
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.0"
+  synchronized:
+    dependency: transitive
+    description:
+      name: synchronized
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.0.0"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0"
+    version: "1.2.0"
   typed_data:
     dependency: transitive
     description:
       name: typed_data
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
+    version: "1.3.0"
   uuid:
     dependency: transitive
     description:
       name: uuid
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.2.0"
+    version: "3.0.4"
   xml:
     dependency: transitive
     description:
@@ -240,4 +226,4 @@ packages:
     source: hosted
     version: "4.4.1"
 sdks:
-  dart: ">=2.8.0 <3.0.0"
+  dart: ">=2.12.0 <3.0.0"

example/pubspec.yaml

@@ -12,4 +12,4 @@ dependencies:
     path: ../
 
 dev_dependencies:
-  pedantic: ^1.9.2
+  pedantic: '>=1.7.0 <2.0.0'

lib/src/crypto/key_encrypter_kdf.dart

@@ -5,8 +5,8 @@ import 'package:argon2_ffi_base/argon2_ffi_base.dart';
 import 'package:crypto/crypto.dart' as crypto;
 import 'package:isolates/isolate_runner.dart';
 import 'package:kdbx/kdbx.dart';
-import 'package:kdbx/src/utils/byte_utils.dart';
 import 'package:kdbx/src/kdbx_var_dictionary.dart';
+import 'package:kdbx/src/utils/byte_utils.dart';
 import 'package:logging/logging.dart';
 import 'package:pointycastle/export.dart';
 
@@ -98,12 +98,12 @@ class KeyEncrypterKdf {
       case KdfType.Argon2:
         _logger.fine('Must be using argon2');
         return await encryptArgon2(key, kdfParameters);
-        break;
       case KdfType.Aes:
         _logger.fine('Must be using aes');
         return await encryptAes(key, kdfParameters);
+      default:
+        throw UnsupportedError('unsupported KDF Type $kdfType.');
     }
-    throw UnsupportedError('unsupported KDF Type $kdfType.');
   }
 
   Future<Uint8List> encryptArgon2(

lib/src/internal/async_utils.dart

@@ -9,9 +9,7 @@ mixin StreamSubscriberBase {
   /// Listens to a stream and saves it to the list of subscriptions.
   void listen(Stream<dynamic> stream, void Function(dynamic data) onData,
       {Function? onError}) {
-    if (stream != null) {
+    _subscriptions.add(stream.listen(onData, onError: onError));
-      _subscriptions.add(stream.listen(onData, onError: onError));
-    }
   }
 
   void handle(StreamSubscription<dynamic> subscription) {

lib/src/internal/crypto_utils.dart

@@ -49,7 +49,6 @@ class AesHelper {
         break;
       default:
         throw ArgumentError('incorrect value of the "mode" parameter');
-        break;
     }
     cipher.init(false, params);
 

lib/src/kdbx_binary.dart

@@ -2,10 +2,9 @@ import 'dart:convert';
 import 'dart:io';
 import 'dart:typed_data';
 
-import 'package:kdbx/src/utils/byte_utils.dart';
 import 'package:kdbx/src/kdbx_header.dart';
 import 'package:kdbx/src/kdbx_xml.dart';
-import 'package:meta/meta.dart';
+import 'package:kdbx/src/utils/byte_utils.dart';
 import 'package:quiver/core.dart';
 import 'package:xml/xml.dart';
 
@@ -43,7 +42,6 @@ class KdbxBinary {
 
   static KdbxBinary readBinaryXml(XmlElement valueNode,
       {required bool isInline}) {
-    assert(isInline != null);
     final isProtected = valueNode.getAttributeBool(KdbxXml.ATTR_PROTECTED);
     final isCompressed = valueNode.getAttributeBool(KdbxXml.ATTR_COMPRESSED);
     var value = base64.decode(valueNode.text.trim());

lib/src/kdbx_custom_data.dart

@@ -1,7 +1,7 @@
+import 'package:kdbx/src/internal/extension_utils.dart';
 import 'package:kdbx/src/kdbx_object.dart';
 import 'package:kdbx/src/kdbx_xml.dart';
 import 'package:xml/xml.dart' as xml;
-import 'package:kdbx/src/internal/extension_utils.dart';
 
 class KdbxCustomData extends KdbxNode {
   KdbxCustomData.create()

lib/src/kdbx_dao.dart

@@ -2,7 +2,6 @@ import 'package:kdbx/src/kdbx_entry.dart';
 import 'package:kdbx/src/kdbx_file.dart';
 import 'package:kdbx/src/kdbx_group.dart';
 import 'package:kdbx/src/kdbx_object.dart';
-import 'package:meta/meta.dart';
 
 /// Helper object for accessing and modifing data inside
 /// a kdbx file.
@@ -11,7 +10,6 @@ extension KdbxDao on KdbxFile {
     required KdbxGroup parent,
     required String name,
   }) {
-    assert(parent != null, name != null);
     final newGroup = KdbxGroup.create(ctx: ctx, parent: parent, name: name);
     parent.addGroup(newGroup);
     return newGroup;
@@ -20,7 +18,7 @@ extension KdbxDao on KdbxFile {
   KdbxGroup findGroupByUuid(KdbxUuid? uuid) =>
       body.rootGroup.getAllGroups().firstWhere((group) => group.uuid == uuid,
           orElse: (() =>
-              throw StateError('Unable to find group with uuid $uuid')) as KdbxGroup Function()?);
+              throw StateError('Unable to find group with uuid $uuid')));
 
   void deleteGroup(KdbxGroup group) {
     move(group, getRecycleBinOrCreate());
@@ -31,7 +29,6 @@ extension KdbxDao on KdbxFile {
   }
 
   void move(KdbxObject kdbxObject, KdbxGroup toGroup) {
-    assert(toGroup != null);
     kdbxObject.times.locationChanged.setToNow();
     if (kdbxObject is KdbxGroup) {
       kdbxObject.parent!.internalRemoveGroup(kdbxObject);

lib/src/kdbx_entry.dart

@@ -296,7 +296,6 @@ class KdbxEntry extends KdbxObject {
   StringValue? getString(KdbxKey key) => _strings[key];
 
   void setString(KdbxKey key, StringValue? value) {
-    assert(key != null);
     if (_strings[key] == value) {
       _logger.finest('Value did not change for $key');
       return;
@@ -338,9 +337,6 @@ class KdbxEntry extends KdbxObject {
     required String name,
     required Uint8List bytes,
   }) {
-    assert(isProtected != null);
-    assert(bytes != null);
-    assert(name != null);
     // make sure we don't have a path, just the file name.
     final key = _uniqueBinaryName(path.basename(name));
     final binary = KdbxBinary(

lib/src/kdbx_format.dart

@@ -11,18 +11,12 @@ import 'package:crypto/crypto.dart' as crypto;
 import 'package:kdbx/kdbx.dart';
 import 'package:kdbx/src/crypto/key_encrypter_kdf.dart';
 import 'package:kdbx/src/crypto/protected_salt_generator.dart';
-import 'package:kdbx/src/crypto/protected_value.dart';
 import 'package:kdbx/src/internal/consts.dart';
 import 'package:kdbx/src/internal/crypto_utils.dart';
 import 'package:kdbx/src/internal/extension_utils.dart';
-import 'package:kdbx/src/kdbx_binary.dart';
 import 'package:kdbx/src/kdbx_deleted_object.dart';
 import 'package:kdbx/src/kdbx_entry.dart';
-import 'package:kdbx/src/kdbx_file.dart';
-import 'package:kdbx/src/kdbx_group.dart';
 import 'package:kdbx/src/kdbx_header.dart';
-import 'package:kdbx/src/kdbx_meta.dart';
-import 'package:kdbx/src/kdbx_object.dart';
 import 'package:kdbx/src/kdbx_xml.dart';
 import 'package:kdbx/src/utils/byte_utils.dart';
 import 'package:logging/logging.dart';
@@ -39,7 +33,7 @@ abstract class Credentials {
       Credentials.composite(password, null); //PasswordCredentials(password);
   factory Credentials.composite(ProtectedValue password, Uint8List? keyFile) =>
       KeyFileComposite(
-        password: password == null ? null : PasswordCredentials(password),
+        password: PasswordCredentials(password),
         keyFile: keyFile == null ? null : KeyFileCredentials(keyFile),
       );
 
@@ -73,9 +67,7 @@ class KdbxReadWriteContext {
   KdbxReadWriteContext({
     required List<KdbxBinary> binaries,
     required this.header,
-  })  : assert(binaries != null),
+  })  : _binaries = binaries,
-        assert(header != null),
-        _binaries = binaries,
         _deletedObjects = [];
 
   static final kdbxContext = Expando<KdbxReadWriteContext>();
@@ -129,7 +121,6 @@ class KdbxReadWriteContext {
   /// finds the ID of the given binary.
   /// if it can't be found, [KdbxCorruptedFileException] is thrown.
   int findBinaryId(KdbxBinary binary) {
-    assert(binary != null);
     assert(!binary.isInline!);
     final id = _binaries.indexOf(binary);
     if (id < 0) {
@@ -818,7 +809,7 @@ class KdbxFormat {
     final deletedObjects = root
             .findElements(KdbxXml.NODE_DELETED_OBJECTS)
             .singleOrNull
-            ?.let((el) => el!
+            ?.let((el) => el
                 .findElements(KdbxDeletedObject.NODE_NAME)
                 .map((node) => KdbxDeletedObject.read(node, ctx))) ??
         [];

lib/src/kdbx_group.dart

@@ -1,11 +1,9 @@
 import 'package:kdbx/kdbx.dart';
 import 'package:kdbx/src/internal/extension_utils.dart';
-import 'package:kdbx/src/kdbx_consts.dart';
 import 'package:kdbx/src/kdbx_entry.dart';
 import 'package:kdbx/src/kdbx_format.dart';
 import 'package:kdbx/src/kdbx_xml.dart';
 import 'package:logging/logging.dart';
-import 'package:meta/meta.dart';
 import 'package:xml/xml.dart';
 
 import 'kdbx_object.dart';

lib/src/kdbx_header.dart

@@ -2,12 +2,11 @@ import 'dart:typed_data';
 
 import 'package:crypto/crypto.dart' as crypto;
 import 'package:kdbx/src/crypto/key_encrypter_kdf.dart';
-import 'package:kdbx/src/utils/byte_utils.dart';
 import 'package:kdbx/src/internal/consts.dart';
 import 'package:kdbx/src/kdbx_binary.dart';
 import 'package:kdbx/src/kdbx_var_dictionary.dart';
+import 'package:kdbx/src/utils/byte_utils.dart';
 import 'package:logging/logging.dart';
-import 'package:meta/meta.dart';
 import 'package:quiver/check.dart';
 import 'package:quiver/core.dart';
 
@@ -482,7 +481,8 @@ class KdbxHeader {
       return Cipher.aes;
     }
     try {
-      return CryptoConsts.cipherFromBytes(fields[HeaderFields.CipherID]!.bytes!);
+      return CryptoConsts.cipherFromBytes(
+          fields[HeaderFields.CipherID]!.bytes!);
     } catch (e, stackTrace) {
       _logger.warning(
           'Unable to find cipher. '
@@ -509,7 +509,7 @@ class KdbxHeader {
     final id =
         ReaderHelper.singleUint32(fields[HeaderFields.CompressionFlags]!.bytes);
     return _compressionIdsById[id] ??
-        (() => throw KdbxUnsupportedException('invalid compression $id'))()!;
+        (() => throw KdbxUnsupportedException('invalid compression $id'))();
   }
 
   ProtectedValueEncryption get innerRandomStreamEncryption =>
@@ -638,8 +638,7 @@ class InnerHeader {
   InnerHeader({
     required this.fields,
     List<InnerHeaderField>? binaries,
-  })  : binaries = binaries ?? [],
+  }) : binaries = binaries ?? [];
-        assert(fields != null);
 
   factory InnerHeader.fromFields(Iterable<InnerHeaderField> fields) {
     final fieldMap = Map.fromEntries(fields

lib/src/kdbx_meta.dart

@@ -9,13 +9,11 @@ import 'package:kdbx/src/kdbx_format.dart';
 import 'package:kdbx/src/kdbx_header.dart';
 import 'package:kdbx/src/kdbx_object.dart';
 import 'package:kdbx/src/kdbx_xml.dart';
-import 'package:meta/meta.dart';
+import 'package:logging/logging.dart';
 import 'package:quiver/iterables.dart';
 import 'package:xml/xml.dart' as xml;
 import 'package:xml/xml.dart';
 
-import 'package:logging/logging.dart';
-
 final _logger = Logger('kdbx_meta');
 
 class KdbxMeta extends KdbxNode implements KdbxNodeContext {
@@ -41,12 +39,12 @@ class KdbxMeta extends KdbxNode implements KdbxNodeContext {
   KdbxMeta.read(xml.XmlElement node, this.ctx)
       : customData = node
                 .singleElement('CustomData')
-                ?.let((e) => KdbxCustomData.read(e!)) ??
+                ?.let((e) => KdbxCustomData.read(e)) ??
             KdbxCustomData.create(),
         binaries = node
             .singleElement(KdbxXml.NODE_BINARIES)
             ?.let((el) sync* {
-              for (final binaryNode in el!.findElements(KdbxXml.NODE_BINARY)) {
+              for (final binaryNode in el.findElements(KdbxXml.NODE_BINARY)) {
                 final id = int.parse(binaryNode.getAttribute(KdbxXml.ATTR_ID)!);
                 yield MapEntry(
                   id,
@@ -54,9 +52,9 @@ class KdbxMeta extends KdbxNode implements KdbxNodeContext {
                 );
               }
             })
-            ?.toList()
+            .toList()
-            ?.let((binaries) {
+            .let((binaries) {
-              binaries!.sort((a, b) => a.key.compareTo(b.key));
+              binaries.sort((a, b) => a.key.compareTo(b.key));
               for (var i = 0; i < binaries.length; i++) {
                 if (i != binaries[i].key) {
                   throw KdbxCorruptedFileException(
@@ -69,7 +67,7 @@ class KdbxMeta extends KdbxNode implements KdbxNodeContext {
         _customIcons = node
                 .singleElement(KdbxXml.NODE_CUSTOM_ICONS)
                 ?.let((el) sync* {
-                  for (final iconNode in el!.findElements(KdbxXml.NODE_ICON)) {
+                  for (final iconNode in el.findElements(KdbxXml.NODE_ICON)) {
                     yield KdbxCustomIcon(
                         uuid: KdbxUuid(
                             iconNode.singleTextNode(KdbxXml.NODE_UUID)),
@@ -77,8 +75,8 @@ class KdbxMeta extends KdbxNode implements KdbxNodeContext {
                             iconNode.singleTextNode(KdbxXml.NODE_DATA)));
                   }
                 })
-                ?.map((e) => MapEntry(e.uuid, e))
+                .map((e) => MapEntry(e.uuid, e))
-                ?.let((that) => Map.fromEntries(that!)) ??
+                .let((that) => Map.fromEntries(that)) ??
             {},
         super.read(node);
 

lib/src/kdbx_object.dart

@@ -151,16 +151,14 @@ abstract class KdbxObject extends KdbxNode {
     this.file,
     String nodeName,
     KdbxGroup? parent,
-  )   : assert(ctx != null),
+  )   : times = KdbxTimes.create(ctx),
-        times = KdbxTimes.create(ctx),
         _parent = parent,
         super.create(nodeName) {
     _uuid.set(KdbxUuid.random());
   }
 
   KdbxObject.read(this.ctx, KdbxGroup? parent, XmlElement node)
-      : assert(ctx != null),
+      : times = KdbxTimes.read(node.findElements('Times').single, ctx),
-        times = KdbxTimes.read(node.findElements('Times').single, ctx),
         _parent = parent,
         super.read(node);
 

lib/src/kdbx_times.dart

@@ -2,11 +2,10 @@ import 'package:clock/clock.dart';
 import 'package:kdbx/src/kdbx_format.dart';
 import 'package:kdbx/src/kdbx_object.dart';
 import 'package:kdbx/src/kdbx_xml.dart';
+import 'package:logging/logging.dart';
 import 'package:quiver/iterables.dart';
 import 'package:xml/xml.dart';
 
-import 'package:logging/logging.dart';
-
 final _logger = Logger('kdbx_times');
 
 class KdbxTimes extends KdbxNode implements KdbxNodeContext {

lib/src/kdbx_var_dictionary.dart

@@ -88,8 +88,7 @@ class VarDictionaryItem<T> {
 
 class VarDictionary {
   VarDictionary(List<VarDictionaryItem<dynamic>> items)
-      : assert(items != null),
+      : _items = items,
-        _items = items,
         _dict = Map.fromEntries(items.map((item) => MapEntry(item._key, item)));
 
   factory VarDictionary.read(ReaderHelper reader) {

lib/src/kdbx_xml.dart

@@ -3,16 +3,15 @@ import 'dart:typed_data';
 
 import 'package:clock/clock.dart';
 import 'package:collection/collection.dart' show IterableExtension;
+import 'package:kdbx/src/kdbx_consts.dart';
 import 'package:kdbx/src/kdbx_format.dart';
 import 'package:kdbx/src/kdbx_header.dart';
 import 'package:kdbx/src/kdbx_object.dart';
 import 'package:kdbx/src/utils/byte_utils.dart';
-import 'package:kdbx/src/kdbx_consts.dart';
+import 'package:logging/logging.dart';
 import 'package:meta/meta.dart';
 import 'package:xml/xml.dart';
 
-import 'package:logging/logging.dart';
-
 final _logger = Logger('kdbx_xml');
 
 class KdbxXml {
@@ -92,9 +91,8 @@ abstract class KdbxSubTextNode<T> extends KdbxSubNode<T?> {
   @protected
   T decode(String value);
 
-  XmlElement? _opt(String nodeName) => node.node
+  XmlElement? _opt(String nodeName) =>
-      .findElements(nodeName)
+      node.node.findElements(nodeName).singleWhereOrNull((x) => true);
-      .singleWhereOrNull((x) => true);
 
   void setOnModifyListener(void Function() onModify) {
     _onModify = onModify;
@@ -192,7 +190,7 @@ class IconNode extends KdbxSubTextNode<KdbxIcon> {
 }
 
 class KdbxColor {
-  const KdbxColor._fromRgbCode(this._rgb) : assert(_rgb != null && _rgb != '');
+  const KdbxColor._fromRgbCode(this._rgb) : assert(_rgb != '');
   const KdbxColor._nullColor() : _rgb = '';
 
   factory KdbxColor.parse(String rgb) =>
@@ -220,7 +218,7 @@ class BooleanNode extends KdbxSubTextNode<bool?> {
 
   @override
   bool? decode(String value) {
-    switch (value?.toLowerCase()) {
+    switch (value.toLowerCase()) {
       case 'null':
         return null;
       case 'true':
@@ -252,9 +250,6 @@ class DateTimeUtcNode extends KdbxSubTextNode<DateTime?> {
 
   @override
   DateTime? decode(String value) {
-    if (value == null) {
-      return null;
-    }
     if (value.isEmpty) {
       _logger.warning('time contains empty string. $name');
       return null;

lib/src/utils/byte_utils.dart

@@ -1,5 +1,4 @@
 import 'dart:convert';
-import 'dart:io';
 import 'dart:math';
 import 'dart:typed_data';
 
@@ -32,7 +31,7 @@ class ByteUtils {
   static String toHex(int val) => '0x${val.toRadixString(16).padLeft(2, '0')}';
 
   static String toHexList(List<int>? list) =>
-      list?.map((val) => toHex(val))?.join(' ') ?? '(null)';
+      list?.map((val) => toHex(val)).join(' ') ?? '(null)';
 }
 
 extension Uint8ListExt on Uint8List {

test/kdbx_test.dart

@@ -1,12 +1,9 @@
 @Tags(['kdbx3'])
-
 import 'dart:io';
 import 'dart:typed_data';
 
 import 'package:kdbx/kdbx.dart';
 import 'package:kdbx/src/crypto/protected_salt_generator.dart';
-import 'package:kdbx/src/crypto/protected_value.dart';
-import 'package:kdbx/src/kdbx_format.dart';
 import 'package:logging/logging.dart';
 import 'package:logging_appenders/logging_appenders.dart';
 import 'package:synchronized/synchronized.dart';

test/kdbx_upgrade_test.dart

@@ -1,7 +1,6 @@
 @Tags(['kdbx3', 'kdbx4'])
 
 import 'package:kdbx/kdbx.dart';
-import 'package:kdbx/src/kdbx_header.dart';
 import 'package:test/test.dart';
 
 import 'internal/test_utils.dart';

test/var_dictionary_test.dart

@@ -1,6 +1,6 @@
 import 'package:kdbx/src/crypto/key_encrypter_kdf.dart';
-import 'package:kdbx/src/utils/byte_utils.dart';
 import 'package:kdbx/src/kdbx_var_dictionary.dart';
+import 'package:kdbx/src/utils/byte_utils.dart';
 import 'package:logging/logging.dart';
 import 'package:logging_appenders/logging_appenders.dart';
 import 'package:test/test.dart';