diff --git a/src/Providers/HttpProvider.php b/src/Providers/HttpProvider.php
index 68f266b..5408774 100644
--- a/src/Providers/HttpProvider.php
+++ b/src/Providers/HttpProvider.php
@@ -31,19 +31,18 @@ class HttpProvider extends Provider implements IProvider
     /**
      * send
      * 
-     * @param string $method
-     * @param array $arguments
+     * @param \Web3\Methods\Method $method
      * @param callable $callback
      * @return void
      */
-    public function send($method, $arguments, $callback)
+    public function send($method, $callback)
     {
-        $rpc = $this->createRpc($method, $arguments);
+        $payload = $method->toPayloadString();
 
-        if (!$this->isBatch) {            
-            $this->requestManager->sendPayload(json_encode($rpc), $callback);
+        if (!$this->isBatch) {          
+            $this->requestManager->sendPayload($payload, $callback);
         } else {
-            $this->batch[] = json_encode($rpc);
+            $this->batch[] = $payload;
         }
     }
 
diff --git a/src/Providers/IProvider.php b/src/Providers/IProvider.php
index c9751a9..bbc8a7e 100644
--- a/src/Providers/IProvider.php
+++ b/src/Providers/IProvider.php
@@ -16,12 +16,11 @@ interface IProvider
     /**
      * send
      * 
-     * @param string $method
-     * @param array $arguments
+     * @param \Web3\Methods\Method $method
      * @param callable $callback
      * @return void
      */
-    public function send($method, $arguments, $callback);    
+    public function send($method, $callback);  
 
     /**
      * batch
diff --git a/src/Web3.php b/src/Web3.php
index e212e00..48464ee 100644
--- a/src/Web3.php
+++ b/src/Web3.php
@@ -63,15 +63,15 @@ class Web3
      * 
      * @var array
      */
-    private $methods = [
-        'web3_clientVersion' => [],
-        'web3_sha3' => [
-            'params' => [
-                [
-                    'validators' => HexValidator::class
-                ]
-            ]
-        ]
+    private $methods = [];
+
+    /**
+     * allowedMethods
+     * 
+     * @var array
+     */
+    private $allowedMethods = [
+        'web3_clientVersion', 'web3_sha3'
     ];
 
     /**
@@ -112,11 +112,9 @@ class Web3
         if (preg_match('/^[a-zA-Z0-9]+$/', $name) === 1) {
             $method = strtolower($class[1]) . '_' . $name;
 
-            if (!array_key_exists($method, $this->methods)) {
+            if (!in_array($method, $this->allowedMethods)) {
                 throw new \RuntimeException('Unallowed rpc method: ' . $method);
             }
-            $allowedMethod = $this->methods[$method];
-
             if ($this->provider->isBatch) {
                 $callback = null;
             } else {
@@ -126,43 +124,15 @@ class Web3
                     throw new \InvalidArgumentException('The last param must be callback function.');
                 }
             }
-            if (isset($allowedMethod['params']) && is_array($allowedMethod['params'])) {
-                // validate params
-                foreach ($allowedMethod['params'] as $key => $param) {
-                    if (isset($param['validators'])) {
-                        if (is_array($param['validators'])) {
-                            $isError = true;
-
-                            foreach ($param['validators'] as $rule) {
-                                if (isset($arguments[$key])) {
-                                    if (call_user_func([$rule, 'validate'], $arguments[$key]) === true) {
-                                        $isError = false;
-                                        break;
-                                    }
-                                } else {
-                                    if (isset($param['default'])) {
-                                        $arguments[$key] = $param['default'];
-                                        $isError = false;
-                                        break;
-                                    }
-                                }
-                            }
-                            if ($isError === true) {
-                                throw new \RuntimeException('Wrong type of ' . $name . ' method argument ' . $key . '.');
-                            }
-                        } else {
-                            if (!isset($arguments[$key]) || call_user_func([$param['validators'], 'validate'], $arguments[$key]) === false) {
-                                if (isset($param['default']) && !isset($arguments[$key])) {
-                                    $arguments[$key] = $param['default'];
-                                } else {
-                                    throw new \RuntimeException('Wrong type of ' . $name . ' method argument ' . $key . '.');
-                                }
-                            }
-                        }
-                    }
-                }
+            if (!array_key_exists($method, $this->methods)) {
+                // new the method
+                $methodClass = sprintf("\Web3\Methods\%s\%s", ucfirst($class[1]), ucfirst($name));
+                $methodObject = new $methodClass($method, $arguments);
             }
-            $this->provider->send($method, $arguments, $callback);
+            $inputs = $methodObject->transform($arguments, $methodObject->inputFormatters);
+            $methodObject->arguments = $inputs;
+
+            $this->provider->send($methodObject, $callback);
         }
     }