diff --git a/app/Contracts/ServiceResult.php b/app/Contracts/ServiceResult.php
index 87f87f6..1af22ed 100644
--- a/app/Contracts/ServiceResult.php
+++ b/app/Contracts/ServiceResult.php
@@ -6,4 +6,5 @@ namespace App\Contracts;
 interface ServiceResult
 {
     public function isSuccess(): bool;
+    public function isError(): bool;
 }
diff --git a/app/ServiceResults/ServiceResult.php b/app/ServiceResults/ServiceResult.php
index 826d3a0..6a83939 100644
--- a/app/ServiceResults/ServiceResult.php
+++ b/app/ServiceResults/ServiceResult.php
@@ -10,6 +10,11 @@ abstract class ServiceResult implements ServiceResultContract
 {
     public function isSuccess(): bool
     {
-        return $this instanceof ServiceResultErrorContract !== true;
+        return $this->isError() === false;
+    }
+
+    public function isError(): bool
+    {
+        return $this instanceof ServiceResultErrorContract === true;
     }
 }