diff --git a/src/Eth.php b/src/Eth.php
index 71fcf98..282ebd3 100644
--- a/src/Eth.php
+++ b/src/Eth.php
@@ -99,10 +99,11 @@ class Eth
             } else {
                 $methodObject = $this->methods[$method];
             }
-            $inputs = $methodObject->transform($arguments, $methodObject->inputFormatters);
-            $methodObject->arguments = $inputs;
-
-            $this->provider->send($methodObject, $callback);
+            if ($methodObject->validate($arguments)) {
+                $inputs = $methodObject->transform($arguments, $methodObject->inputFormatters);
+                $methodObject->arguments = $inputs;
+                $this->provider->send($methodObject, $callback);
+            }
         }
     }