diff --git a/src/Eth.php b/src/Eth.php
index 0ba5e99..5f6e463 100644
--- a/src/Eth.php
+++ b/src/Eth.php
@@ -3,6 +3,9 @@
 namespace Web3;
 
 use Web3\Providers\Provider;
+use Web3\Providers\HttpProvider;
+use Web3\RequestManagers\RequestManager;
+use Web3\RequestManagers\HttpRequestManager;
 
 class Eth
 {
@@ -13,10 +16,19 @@ class Eth
      */
     protected $provider;
 
+    /**
+     * methods
+     * 
+     * @var array
+     */
+    private $methods = [
+        'eth_protocolVersion' => [],
+    ];
+
     /**
      * construct
      *
-     * @param mixed string | provider $provider
+     * @param mixed string | Web3\Providers\Provider $provider
      * @return void
      */
     public function __construct($provider)
@@ -24,7 +36,9 @@ class Eth
         if (is_string($provider) && (filter_var($provider, FILTER_VALIDATE_URL) !== false)) {
             // check the uri schema
             if (preg_match('/^https?:\/\//', $provider) === 1) {
-                $this->provider = $provider;
+                $requestManeger = new HttpRequestManager($provider);
+
+                $this->provider = new HttpProvider($requestManeger);
             }
         } else if ($provider instanceof Provider) {
             $this->provider = $provider;
@@ -40,7 +54,39 @@ class Eth
      */
     public function __call($name, $arguments)
     {
-        // 
+        if (empty($this->provider)) {
+            return;
+        }
+
+        $class = explode('\\', get_class());
+
+        if (strtolower($class[1]) === 'eth' && preg_match('/^[a-zA-Z0-9]+$/', $name) === 1) {
+            $method = strtolower($class[1]) . '_' . $name;
+
+            if (!array_key_exists($method, $this->methods)) {
+                throw new \RuntimeException('Unallowed rpc method: ' . $method);
+            }
+            $allowedMethod = $this->methods[$method];
+
+            if (isset($allowedMethod['params'])) {
+                // validate params
+                foreach ($allowedMethod['params'] as $key => $rule) {
+                    if (call_user_func([$rule, 'validate'], $arguments[$key]) === false) {
+                        throw new \RuntimeException('Wrong type of ' . $name . ' method argument ' . $key . '.');
+                    }
+                }
+            }
+            if ($this->provider->isBatch) {
+                $this->provider->send($method, $arguments, null);
+            } else {
+                $callback = array_pop($arguments);
+
+                if (is_callable($callback) !== true) {
+                    throw new \InvalidArgumentException('The last param must be callback function.');
+                }
+                $this->provider->send($method, $arguments, $callback);
+            }
+        }
     }
 
     /**
diff --git a/src/Web3.php b/src/Web3.php
index 1667316..329df17 100644
--- a/src/Web3.php
+++ b/src/Web3.php
@@ -74,7 +74,7 @@ class Web3
 
         $class = explode('\\', get_class());
 
-        if (strtolower($class[0]) === 'web3' && preg_match('/^[a-zA-Z0-9]+$/', $name) === 1) {
+        if (strtolower($class[1]) === 'web3' && preg_match('/^[a-zA-Z0-9]+$/', $name) === 1) {
             $method = strtolower($class[1]) . '_' . $name;
 
             if (!array_key_exists($method, $this->methods)) {
diff --git a/test/unit/EthTest.php b/test/unit/EthTest.php
new file mode 100644
index 0000000..65a75d3
--- /dev/null
+++ b/test/unit/EthTest.php
@@ -0,0 +1,75 @@
+<?php
+
+namespace Test\Unit;
+
+use RuntimeException;
+use Test\TestCase;
+use Web3\Web3;
+use Web3\Eth;
+use Web3\Providers\HttpProvider;
+use Web3\RequestManagers\RequestManager;
+
+class EthTest extends TestCase
+{
+    /**
+     * web3
+     * 
+     * @var \Web3\Web3
+     */
+    protected $web3;
+
+    /**
+     * setUp
+     * 
+     * @return void
+     */
+    public function setUp()
+    {
+        $web3 = new Web3('https://rinkeby.infura.io/vuethexplore');
+        $this->web3 = $web3;
+    }
+
+    /**
+     * testSend
+     * 
+     * @return void
+     */    
+    public function testSend()
+    {
+        $eth = $this->web3->eth;
+
+        $eth->protocolVersion(function ($err, $version) {
+            if ($err !== null) {
+                return $this->fail($err->getMessage());
+            }
+            if (isset($version->result)) {
+                $this->assertTrue(is_string($version->result));
+            } else {
+                $this->fail($version->error->message);
+            }
+        });
+    }
+
+    /**
+     * testUnallowedMethod
+     * 
+     * @return void
+     */
+    public function testUnallowedMethod()
+    {
+        $this->expectException(RuntimeException::class);
+
+        $eth = $this->web3->eth;
+
+        $eth->hello(function ($err, $hello) {
+            if ($err !== null) {
+                return $this->fail($err->getMessage());
+            }
+            if (isset($hello->result)) {
+                $this->assertTrue(true);
+            } else {
+                $this->fail($hello->error->message);
+            }
+        });
+    }
+}
\ No newline at end of file