Add some method annotators, see if this helps with Scrutinizer issues.

app/Helpers/Attachments/AttachmentHelper.php

@@ -166,7 +166,7 @@ class AttachmentHelper implements AttachmentHelperInterface
         $attachment->md5      = md5_file($path);
         $attachment->mime     = $mime;
         $attachment->size     = \strlen($content);
-        $attachment->uploaded = 1;
+        $attachment->uploaded = true;
         $attachment->save();
 
         return true;

app/Repositories/LinkType/LinkTypeRepository.php

@@ -210,7 +210,7 @@ class LinkTypeRepository implements LinkTypeRepositoryInterface
     /**
      * @param User $user
      */
-    public function setUser(User $user)
+    public function setUser(User $user): void
     {
         $this->user = $user;
     }

app/Repositories/LinkType/LinkTypeRepositoryInterface.php

@@ -25,6 +25,7 @@ namespace FireflyIII\Repositories\LinkType;
 use FireflyIII\Models\LinkType;
 use FireflyIII\Models\TransactionJournal;
 use FireflyIII\Models\TransactionJournalLink;
+use FireflyIII\User;
 use Illuminate\Support\Collection;
 
 /**
@@ -62,6 +63,13 @@ interface LinkTypeRepositoryInterface
      */
     public function find(int $id): LinkType;
 
+    /**
+     * Set the user for this instance.
+     *
+     * @param User $user
+     */
+    public function setUser(User $user): void;
+
     /**
      * Find link type by name.
      *

app/Support/Facades/Amount.php

@@ -22,11 +22,15 @@ declare(strict_types=1);
 
 namespace FireflyIII\Support\Facades;
 
+use FireflyIII\Models\TransactionCurrency;
+use FireflyIII\User;
 use Illuminate\Support\Facades\Facade;
 
 /**
  * @codeCoverageIgnore
  * Class Amount.
+ *
+ * @method TransactionCurrency getDefaultCurrencyByUser(User $user)
  */
 class Amount extends Facade
 {

app/Support/Facades/Navigation.php

@@ -27,6 +27,9 @@ use Illuminate\Support\Facades\Facade;
 /**
  * @codeCoverageIgnore
  * Class Navigation.
+ *
+ * @method array blockPeriods(\Carbon\Carbon $start, \Carbon\Carbon $end, string $range)
+ * @method string periodShow(\Carbon\Carbon $theDate, string $repeatFrequency)
  */
 class Navigation extends Facade
 {

app/Support/Facades/Preferences.php

@@ -22,11 +22,18 @@ declare(strict_types=1);
 
 namespace FireflyIII\Support\Facades;
 
+use FireflyIII\Models\Preference;
+use FireflyIII\User;
 use Illuminate\Support\Facades\Facade;
 
 /**
  * @codeCoverageIgnore
  * Class Preferences.
+ *
+ * @method Preference set(string $name, $value)
+ * @method Preference get(string $name, $value)
+ * @method Preference|null getForUser(User $user, string $name, $default)
+ * @method void mark()
  */
 class Preferences extends Facade
 {

app/Support/Facades/Steam.php

@@ -27,6 +27,7 @@ use Illuminate\Support\Facades\Facade;
 /**
  * @codeCoverageIgnore
  * Class Steam.
+ * @method string positive(string $amount)
  */
 class Steam extends Facade
 {

app/Support/Navigation.php

@@ -298,7 +298,7 @@ class Navigation
      *
      * @throws \FireflyIII\Exceptions\FireflyException
      */
-    public function periodShow(Carbon $theDate, string $repeatFrequency): string
+    public function periodShow(\Carbon\Carbon $theDate, string $repeatFrequency): string
     {
         $date      = clone $theDate;
         $formatMap = [

app/Support/Preferences.php

@@ -79,12 +79,12 @@ class Preferences
     }
 
     /**
-     * @param      $name
+     * @param string $name
-     * @param null $default
+     * @param null   $default
      *
      * @return \FireflyIII\Models\Preference|null
      */
-    public function get($name, $default = null)
+    public function get(string $name, $default = null): ?Preference
     {
         /** @var User $user */
         $user = auth()->user();
@@ -125,7 +125,7 @@ class Preferences
      *
      * @return \FireflyIII\Models\Preference|null
      */
-    public function getForUser(User $user, $name, $default = null): ?Preference
+    public function getForUser(User $user, string $name, $default = null): ?Preference
     {
         $fullName = sprintf('preference%s%s', $user->id, $name);
         if (Cache::has($fullName)) {
@@ -177,23 +177,21 @@ class Preferences
     }
 
     /**
-     * @return bool
+     *
      */
-    public function mark(): bool
+    public function mark(): void
     {
         $this->set('lastActivity', microtime());
         Session::forget('first');
-
-        return true;
     }
 
     /**
-     * @param   $name
+     * @param string $name
-     * @param   $value
+     * @param mixed  $value
      *
-     * @return Preference
+     * @return \FireflyIII\Models\Preference
      */
-    public function set($name, $value): Preference
+    public function set(string $name, $value): Preference
     {
         $user = auth()->user();
         if (null === $user) {
@@ -210,12 +208,12 @@ class Preferences
 
     /**
      * @param \FireflyIII\User $user
-     * @param                  $name
+     * @param string           $name
      * @param mixed            $value
      *
      * @return Preference
      */
-    public function setForUser(User $user, $name, $value): Preference
+    public function setForUser(User $user, string $name, $value): Preference
     {
         $fullName = sprintf('preference%s%s', $user->id, $name);
         Cache::forget($fullName);