Web3 apis and test.

src/Methods/Web3/ClientVersion.php

@@ -16,6 +16,13 @@ use Web3\Methods\EthMethod;
 
 class ClientVersion extends EthMethod
 {
+    /**
+     * validators
+     * 
+     * @var array
+     */
+    protected $validators = [];
+
     /**
      * inputFormatters
      * 

src/Methods/Web3/Sha3.php

@@ -14,9 +14,19 @@ namespace Web3\Methods\Web3;
 use InvalidArgumentException;
 use Web3\Methods\EthMethod;
 use Web3\Formatters\HexFormatter;
+use Web3\Validators\StringValidator;
 
 class Sha3 extends EthMethod
 {
+    /**
+     * validators
+     * 
+     * @var array
+     */
+    protected $validators = [
+        StringValidator::class
+    ];
+
     /**
      * inputFormatters
      * 

src/Web3.php

@@ -132,11 +132,20 @@ class Web3
             } else {
                 $methodObject = $this->methods[$method];
             }
+            try {
+                if ($methodObject->validate($arguments)) {
                     $inputs = $methodObject->transform($arguments, $methodObject->inputFormatters);
                     $methodObject->arguments = $inputs;
-
                     $this->provider->send($methodObject, $callback);
                 }
+            } catch (\Exception $e) {
+                if (is_callable($callback) === true) {
+                    call_user_func($callback, $e, null);
+                } else {
+                    throw $e;
+                }
+            }
+        }
     }
 
     /**

test/unit/Web3ApiTest.php

@@ -102,13 +102,13 @@ class Web3ApiTest extends TestCase
      */
     public function testWrongParam()
     {
-        $this->expectException(RuntimeException::class);
+        // $this->expectException(RuntimeException::class);
 
         $web3 = $this->web3;
 
         $web3->sha3($web3, function ($err, $hash) {
             if ($err !== null) {
-                return $this->fail($err->getMessage());
+                return $this->assertTrue($err instanceof RuntimeException);
             }
             $this->assertTrue(true);
         });

test/unit/Web3BatchTest.php

@@ -54,4 +54,28 @@ class Web3BatchTest extends TestCase
             $this->assertEquals($data[1], $this->testHash);
         });
     }
+
+    /**
+     * testWrongParam
+     * 
+     * @return void
+     */
+    public function testWrongParam()
+    {
+        $this->expectException(RuntimeException::class);
+
+        $web3 = $this->web3;
+
+        $web3->batch(true);
+        $web3->clientVersion();
+        $web3->sha3($web3);
+
+        $web3->provider->execute(function ($err, $data) {
+            if ($err !== null) {
+                return $this->fail('Got error!');
+            }
+            $this->assertTrue(is_string($data[0]));
+            $this->assertEquals($data[1], $this->testHash);
+        });
+    }
 }