diff --git a/README.md b/README.md
index aa1d5f97..93415199 100644
--- a/README.md
+++ b/README.md
@@ -17,13 +17,13 @@ Set minimum stability to dev
 
 Then
 ```
-composer require sc0vu/web3.php dev-master
+composer require haohetao/web3.php dev-master
 ```
 
 Or you can add this line in composer.json
 
 ```
-"sc0vu/web3.php": "dev-master"
+"haohetao/web3.php": "dev-master"
 ```
 
 
@@ -157,6 +157,20 @@ $personal->provider->execute(function ($err, $data) {
     // do something
 });
 ```
+contract
+```php
+$contract->batch(true);
+foreach ($accounts as $account) {
+    $contract->call('balanceOf', $account);
+}
+
+$contract->eth->provider->execute(function ($err, $data) use ($accounts) {
+    if ($err !== null) {
+        throw new $err;
+    }
+    print_r($data);
+});
+```
 
 ### Contract
 
diff --git a/composer.json b/composer.json
index 69a34631..2ee76ed6 100644
--- a/composer.json
+++ b/composer.json
@@ -1,12 +1,12 @@
 {
-    "name": "sc0vu/web3.php",
+    "name": "haohetao/web3.php",
     "description": "Ethereum web3 interface.",
     "type": "library",
     "license": "MIT",
     "authors": [
         {
-            "name": "sc0Vu",
-            "email": "alk03073135@gmail.com"
+            "name": "hetao",
+            "email": "haohetao@gmail.com"
         }
     ],
     "require": {
diff --git a/src/Contract.php b/src/Contract.php
index 87ad1fc4..dd9efabb 100644
--- a/src/Contract.php
+++ b/src/Contract.php
@@ -2,9 +2,9 @@
 
 /**
  * This file is part of web3.php package.
- * 
+ *
  * (c) Kuan-Cheng,Lai <alk03073135@gmail.com>
- * 
+ *
  * @author Peter Lai <alk03073135@gmail.com>
  * @license MIT
  */
@@ -44,56 +44,56 @@ class Contract
 
     /**
      * abi
-     * 
+     *
      * @var array
      */
     protected $abi;
 
     /**
      * constructor
-     * 
+     *
      * @var array
      */
     protected $constructor = [];
 
     /**
      * functions
-     * 
+     *
      * @var array
      */
     protected $functions = [];
 
     /**
      * events
-     * 
+     *
      * @var array
      */
     protected $events = [];
 
     /**
      * toAddress
-     * 
+     *
      * @var string
      */
     protected $toAddress;
 
     /**
      * bytecode
-     * 
+     *
      * @var string
      */
     protected $bytecode;
 
     /**
      * eth
-     * 
+     *
      * @var \Web3\Eth
      */
     protected $eth;
 
     /**
      * ethabi
-     * 
+     *
      * @var \Web3\Contracts\Ethabi
      */
     protected $ethabi;
@@ -167,7 +167,7 @@ public function __construct($provider, $abi, $defaultBlock = 'latest')
 
     /**
      * call
-     * 
+     *
      * @param string $name
      * @param array $arguments
      * @return void
@@ -184,7 +184,7 @@ public function __construct($provider, $abi, $defaultBlock = 'latest')
 
     /**
      * get
-     * 
+     *
      * @param string $name
      * @return mixed
      */
@@ -200,7 +200,7 @@ public function __get($name)
 
     /**
      * set
-     * 
+     *
      * @param string $name
      * @param mixed $value
      * @return mixed
@@ -217,7 +217,7 @@ public function __set($name, $value)
 
     /**
      * getProvider
-     * 
+     *
      * @return \Web3\Providers\Provider
      */
     public function getProvider()
@@ -241,7 +241,7 @@ public function setProvider($provider)
 
     /**
      * getDefaultBlock
-     * 
+     *
      * @return string
      */
     public function getDefaultBlock()
@@ -315,7 +315,7 @@ public function getAbi()
 
     /**
      * setAbi
-     * 
+     *
      * @param string $abi
      * @return $this
      */
@@ -326,7 +326,7 @@ public function setAbi($abi)
 
     /**
      * getEthabi
-     * 
+     *
      * @return array
      */
     public function getEthabi()
@@ -336,7 +336,7 @@ public function getEthabi()
 
     /**
      * getEth
-     * 
+     *
      * @return \Web3\Eth
      */
     public function getEth()
@@ -346,7 +346,7 @@ public function getEth()
 
     /**
      * setBytecode
-     * 
+     *
      * @param string $bytecode
      * @return $this
      */
@@ -357,7 +357,7 @@ public function setBytecode($bytecode)
 
     /**
      * setToAddress
-     * 
+     *
      * @param string $bytecode
      * @return $this
      */
@@ -368,7 +368,7 @@ public function setToAddress($address)
 
     /**
      * at
-     * 
+     *
      * @param string $address
      * @return $this
      */
@@ -384,7 +384,7 @@ public function at($address)
 
     /**
      * bytecode
-     * 
+     *
      * @param string $bytecode
      * @return $this
      */
@@ -400,7 +400,7 @@ public function bytecode($bytecode)
 
     /**
      * abi
-     * 
+     *
      * @param string $abi
      * @return $this
      */
@@ -439,7 +439,7 @@ public function abi($abi)
     /**
      * new
      * Deploy a contruct with params.
-     * 
+     *
      * @param mixed
      * @return void
      */
@@ -481,7 +481,7 @@ public function new()
     /**
      * send
      * Send function method.
-     * 
+     *
      * @param mixed
      * @return void
      */
@@ -490,7 +490,6 @@ public function send()
         if (isset($this->functions)) {
             $arguments = func_get_args();
             $method = array_splice($arguments, 0, 1)[0];
-            $callback = array_pop($arguments);
 
             if (!is_string($method)) {
                 throw new InvalidArgumentException('Please make sure the method is string.');
@@ -505,8 +504,17 @@ public function send()
             if (count($functions) < 1) {
                 throw new InvalidArgumentException('Please make sure the method exists.');
             }
-            if (is_callable($callback) !== true) {
+/*            if (is_callable($callback) !== true) {
                 throw new \InvalidArgumentException('The last param must be callback function.');
+            }*/
+            if ($this->eth->provider->isBatch) {
+                $callback = null;
+            } else {
+                $callback = array_pop($arguments);
+
+                if (is_callable($callback) !== true) {
+                    throw new \InvalidArgumentException('The last param must be callback function.');
+                }
             }
 
             // check the last one in arguments is transaction object
@@ -564,12 +572,16 @@ public function send()
             $transaction['to'] = $this->toAddress;
             $transaction['data'] = $functionSignature . Utils::stripZero($data);
 
-            $this->eth->sendTransaction($transaction, function ($err, $transaction) use ($callback){
-                if ($err !== null) {
-                    return call_user_func($callback, $err, null);
-                }
-                return call_user_func($callback, null, $transaction);
-            });
+            if ($this->eth->provider->isBatch) {
+                $this->eth->sendTransaction($transaction);
+            } else {
+                $this->eth->sendTransaction($transaction, function ($err, $transaction) use ($callback){
+                    if ($err !== null) {
+                        return call_user_func($callback, $err, null);
+                    }
+                    return call_user_func($callback, null, $transaction);
+                });
+            }
         }
     }
 
@@ -585,7 +597,6 @@ public function call()
         if (isset($this->functions)) {
             $arguments = func_get_args();
             $method = array_splice($arguments, 0, 1)[0];
-            $callback = array_pop($arguments);
 
             if (!is_string($method)) {
                 throw new InvalidArgumentException('Please make sure the method is string.');
@@ -600,8 +611,17 @@ public function call()
             if (count($functions) < 1) {
                 throw new InvalidArgumentException('Please make sure the method exists.');
             }
-            if (is_callable($callback) !== true) {
+/*            if (is_callable($callback) !== true) {
                 throw new \InvalidArgumentException('The last param must be callback function.');
+            }*/
+            if ($this->eth->provider->isBatch) {
+                $callback = null;
+            } else {
+                $callback = array_pop($arguments);
+
+                if (is_callable($callback) !== true) {
+                    throw new \InvalidArgumentException('The last param must be callback function.');
+                }
             }
 
             // check the arguments
@@ -658,21 +678,25 @@ public function call()
             $transaction['to'] = $this->toAddress;
             $transaction['data'] = $functionSignature . Utils::stripZero($data);
 
-            $this->eth->call($transaction, $defaultBlock, function ($err, $transaction) use ($callback, $function){
-                if ($err !== null) {
-                    return call_user_func($callback, $err, null);
-                }
-                $decodedTransaction = $this->ethabi->decodeParameters($function, $transaction);
+            if ($this->eth->provider->isBatch) {
+                $this->eth->call($transaction, $defaultBlock);
+            } else {
+                $this->eth->call($transaction, $defaultBlock, function ($err, $transaction) use ($callback, $function){
+                    if ($err !== null) {
+                        return call_user_func($callback, $err, null);
+                    }
+                    $decodedTransaction = $this->ethabi->decodeParameters($function, $transaction);
 
-                return call_user_func($callback, null, $decodedTransaction);
-            });
+                    return call_user_func($callback, null, $decodedTransaction);
+                });
+            }
         }
     }
 
     /**
      * estimateGas
      * Estimate function gas.
-     * 
+     *
      * @param mixed
      * @return void
      */
@@ -708,7 +732,7 @@ public function estimateGas()
                 if (!is_string($method)) {
                     throw new InvalidArgumentException('Please make sure the method is string.');
                 }
-    
+
                 $functions = [];
                 foreach ($this->functions as $function) {
                     if ($function["name"] === $method) {
@@ -721,7 +745,7 @@ public function estimateGas()
                 if (is_callable($callback) !== true) {
                     throw new \InvalidArgumentException('The last param must be callback function.');
                 }
-    
+
                 // check the last one in arguments is transaction object
                 $argsLen = count($arguments);
                 $transaction = [];
@@ -794,7 +818,7 @@ public function estimateGas()
      * 1. Get the funtion data with params.
      * 2. Sign the data with user private key.
      * 3. Call sendRawTransaction.
-     * 
+     *
      * @param mixed
      * @return void
      */
@@ -822,7 +846,7 @@ public function getData()
                 if (!is_string($method)) {
                     throw new InvalidArgumentException('Please make sure the method is string.');
                 }
-    
+
                 $functions = [];
                 foreach ($this->functions as $function) {
                     if ($function["name"] === $method) {
@@ -832,7 +856,7 @@ public function getData()
                 if (count($functions) < 1) {
                     throw new InvalidArgumentException('Please make sure the method exists.');
                 }
-    
+
                 $params = $arguments;
                 $data = "";
                 $functionName = "";
@@ -857,4 +881,14 @@ public function getData()
             return $functionData;
         }
     }
+    /**
+     * batch
+     *
+     * @param bool $status
+     * @return void
+     */
+    public function batch($status)
+    {
+        $this->eth->batch($status);
+    }
 }
diff --git a/src/Eth.php b/src/Eth.php
index 78d97989..32d3eb87 100644
--- a/src/Eth.php
+++ b/src/Eth.php
@@ -173,8 +173,6 @@ public function setProvider($provider)
      */
     public function batch($status)
     {
-        $status = is_bool($status);
-
         $this->provider->batch($status);
     }
-}
\ No newline at end of file
+}
diff --git a/src/Formatters/PrivateFormatter.php b/src/Formatters/PrivateFormatter.php
new file mode 100644
index 00000000..4420f58e
--- /dev/null
+++ b/src/Formatters/PrivateFormatter.php
@@ -0,0 +1,36 @@
+<?php
+
+/**
+ * This file is part of web3.php package.
+ *
+ * (c) Kuan-Cheng,Lai <alk03073135@gmail.com>
+ *
+ * @author Peter Lai <alk03073135@gmail.com>
+ * @license MIT
+ */
+
+namespace Web3\Formatters;
+
+use InvalidArgumentException;
+use Web3\Utils;
+use Web3\Formatters\IFormatter;
+
+class PrivateFormatter implements IFormatter
+{
+    /**
+     * format
+     *
+     * @param mixed $value
+     * @return string
+     */
+    public static function format($value)
+    {
+        $value = Utils::toString($value);
+        $value = mb_strtolower($value);
+
+        if (Utils::isZeroPrefixed($value)) {
+            $value = Utils::stripZero($value);
+        }
+        return $value;
+    }
+}
diff --git a/src/Methods/EthMethod.php b/src/Methods/EthMethod.php
index 5240eb75..ea588be4 100644
--- a/src/Methods/EthMethod.php
+++ b/src/Methods/EthMethod.php
@@ -2,9 +2,9 @@
 
 /**
  * This file is part of web3.php package.
- * 
+ *
  * (c) Kuan-Cheng,Lai <alk03073135@gmail.com>
- * 
+ *
  * @author Peter Lai <alk03073135@gmail.com>
  * @license MIT
  */
@@ -20,35 +20,35 @@ class EthMethod extends JSONRPC implements IMethod
 {
     /**
      * validators
-     * 
+     *
      * @var array
      */
     protected $validators = [];
 
     /**
      * inputFormatters
-     * 
+     *
      * @var array
      */
     protected $inputFormatters = [];
 
     /**
      * outputFormatters
-     * 
+     *
      * @var array
      */
     protected $outputFormatters = [];
 
     /**
      * defaultValues
-     * 
+     *
      * @var array
      */
     protected $defaultValues = [];
 
     /**
      * construct
-     * 
+     *
      * @param string $method
      * @param array $arguments
      * @return void
@@ -60,7 +60,7 @@ class EthMethod extends JSONRPC implements IMethod
 
     /**
      * getInputFormatters
-     * 
+     *
      * @return array
      */
     public function getInputFormatters()
@@ -70,7 +70,7 @@ public function getInputFormatters()
 
     /**
      * getOutputFormatters
-     * 
+     *
      * @return array
      */
     public function getOutputFormatters()
@@ -80,7 +80,7 @@ public function getOutputFormatters()
 
     /**
      * validate
-     * 
+     *
      * @param array $params
      * @return bool
      */
@@ -134,7 +134,7 @@ public function validate(&$params)
 
     /**
      * transform
-     * 
+     *
      * @param array $params
      * @param array $rules
      * @return array
@@ -155,4 +155,4 @@ public function transform($params, $rules)
         }
         return $params;
     }
-}
\ No newline at end of file
+}
diff --git a/src/Methods/Personal/ImportRawKey.php b/src/Methods/Personal/ImportRawKey.php
new file mode 100644
index 00000000..63fb71ed
--- /dev/null
+++ b/src/Methods/Personal/ImportRawKey.php
@@ -0,0 +1,66 @@
+<?php
+
+/**
+ * This file is part of web3.php package.
+ *
+ * (c) Kuan-Cheng,Lai <alk03073135@gmail.com>
+ *
+ * @author Peter Lai <alk03073135@gmail.com>
+ * @license MIT
+ */
+
+namespace Web3\Methods\Personal;
+
+use InvalidArgumentException;
+use Web3\Methods\EthMethod;
+use Web3\Validators\PrivateValidator;
+use Web3\Validators\StringValidator;
+use Web3\Formatters\StringFormatter;
+use Web3\Formatters\PrivateFormatter;
+
+class ImportRawKey extends EthMethod
+{
+    /**
+     * validators
+     *
+     * @var array
+     */
+    protected $validators = [
+        PrivateValidator::class, StringValidator::class
+    ];
+
+    /**
+     * inputFormatters
+     *
+     * @var array
+     */
+    protected $inputFormatters = [
+        PrivateFormatter::class, StringFormatter::class
+    ];
+
+    /**
+     * outputFormatters
+     *
+     * @var array
+     */
+    protected $outputFormatters = [];
+
+    /**
+     * defaultValues
+     *
+     * @var array
+     */
+    protected $defaultValues = [];
+
+    /**
+     * construct
+     *
+     * @param string $method
+     * @param array $arguments
+     * @return void
+     */
+    // public function __construct($method='', $arguments=[])
+    // {
+    //     parent::__construct($method, $arguments);
+    // }
+}
diff --git a/src/Net.php b/src/Net.php
index bb06615d..31957208 100644
--- a/src/Net.php
+++ b/src/Net.php
@@ -173,8 +173,6 @@ public function setProvider($provider)
      */
     public function batch($status)
     {
-        $status = is_bool($status);
-
         $this->provider->batch($status);
     }
-}
\ No newline at end of file
+}
diff --git a/src/Personal.php b/src/Personal.php
index 75aa200c..770004d8 100644
--- a/src/Personal.php
+++ b/src/Personal.php
@@ -2,9 +2,9 @@
 
 /**
  * This file is part of web3.php package.
- * 
+ *
  * (c) Kuan-Cheng,Lai <alk03073135@gmail.com>
- * 
+ *
  * @author Peter Lai <alk03073135@gmail.com>
  * @license MIT
  */
@@ -27,18 +27,18 @@ class Personal
 
     /**
      * methods
-     * 
+     *
      * @var array
      */
     private $methods = [];
 
     /**
      * allowedMethods
-     * 
+     *
      * @var array
      */
     private $allowedMethods = [
-        'personal_listAccounts', 'personal_newAccount', 'personal_unlockAccount', 'personal_lockAccount', 'personal_sendTransaction'
+        'personal_listAccounts', 'personal_newAccount', 'personal_unlockAccount', 'personal_lockAccount', 'personal_sendTransaction', 'personal_importRawKey'
     ];
 
     /**
@@ -63,7 +63,7 @@ public function __construct($provider)
 
     /**
      * call
-     * 
+     *
      * @param string $name
      * @param array $arguments
      * @return void
@@ -109,7 +109,7 @@ public function __call($name, $arguments)
 
     /**
      * get
-     * 
+     *
      * @param string $name
      * @return mixed
      */
@@ -125,7 +125,7 @@ public function __get($name)
 
     /**
      * set
-     * 
+     *
      * @param string $name
      * @param mixed $value
      * @return mixed
@@ -142,7 +142,7 @@ public function __set($name, $value)
 
     /**
      * getProvider
-     * 
+     *
      * @return \Web3\Providers\Provider
      */
     public function getProvider()
@@ -152,7 +152,7 @@ public function getProvider()
 
     /**
      * setProvider
-     * 
+     *
      * @param \Web3\Providers\Provider $provider
      * @return bool
      */
@@ -167,14 +167,12 @@ public function setProvider($provider)
 
     /**
      * batch
-     * 
+     *
      * @param bool $status
      * @return void
      */
     public function batch($status)
     {
-        $status = is_bool($status);
-
         $this->provider->batch($status);
     }
 }
diff --git a/src/Providers/HttpProvider.php b/src/Providers/HttpProvider.php
index b99de556..979490c9 100644
--- a/src/Providers/HttpProvider.php
+++ b/src/Providers/HttpProvider.php
@@ -74,8 +74,6 @@ public function send($method, $callback)
      */
     public function batch($status)
     {
-        $status = is_bool($status);
-
         $this->isBatch = $status;
     }
 
@@ -109,7 +107,7 @@ public function execute($callback)
             return call_user_func($callback, null, $res);
         };
         $this->requestManager->sendPayload('[' . implode(',', $this->batch) . ']', $proxy);
-        $this->methods[] = [];
+        $this->methods = [];
         $this->batch = [];
     }
-}
\ No newline at end of file
+}
diff --git a/src/Shh.php b/src/Shh.php
index bc438e4b..14c9d031 100644
--- a/src/Shh.php
+++ b/src/Shh.php
@@ -2,9 +2,9 @@
 
 /**
  * This file is part of web3.php package.
- * 
+ *
  * (c) Kuan-Cheng,Lai <alk03073135@gmail.com>
- * 
+ *
  * @author Peter Lai <alk03073135@gmail.com>
  * @license MIT
  */
@@ -27,14 +27,14 @@ class Shh
 
     /**
      * methods
-     * 
+     *
      * @var array
      */
     private $methods = [];
 
     /**
      * allowedMethods
-     * 
+     *
      * @var array
      */
     private $allowedMethods = [
@@ -64,7 +64,7 @@ public function __construct($provider)
 
     /**
      * call
-     * 
+     *
      * @param string $name
      * @param array $arguments
      * @return void
@@ -110,7 +110,7 @@ public function __call($name, $arguments)
 
     /**
      * get
-     * 
+     *
      * @param string $name
      * @return mixed
      */
@@ -126,7 +126,7 @@ public function __get($name)
 
     /**
      * set
-     * 
+     *
      * @param string $name
      * @param mixed $value
      * @return mixed
@@ -143,7 +143,7 @@ public function __set($name, $value)
 
     /**
      * getProvider
-     * 
+     *
      * @return \Web3\Providers\Provider
      */
     public function getProvider()
@@ -153,7 +153,7 @@ public function getProvider()
 
     /**
      * setProvider
-     * 
+     *
      * @param \Web3\Providers\Provider $provider
      * @return bool
      */
@@ -168,14 +168,12 @@ public function setProvider($provider)
 
     /**
      * batch
-     * 
+     *
      * @param bool $status
      * @return void
      */
     public function batch($status)
     {
-        $status = is_bool($status);
-
         $this->provider->batch($status);
     }
-}
\ No newline at end of file
+}
diff --git a/src/Validators/PrivateValidator.php b/src/Validators/PrivateValidator.php
new file mode 100644
index 00000000..5656c228
--- /dev/null
+++ b/src/Validators/PrivateValidator.php
@@ -0,0 +1,31 @@
+<?php
+
+/**
+ * This file is part of web3.php package.
+ *
+ * (c) Kuan-Cheng,Lai <alk03073135@gmail.com>
+ *
+ * @author Peter Lai <alk03073135@gmail.com>
+ * @license MIT
+ */
+
+namespace Web3\Validators;
+
+use Web3\Validators\IValidator;
+
+class PrivateValidator
+{
+    /**
+     * validate
+     *
+     * @param string $value
+     * @return bool
+     */
+    public static function validate($value)
+    {
+        if (!is_string($value)) {
+            return false;
+        }
+        return (preg_match('/^(0x)?[a-fA-F0-9]{64}$/', $value) >= 1);
+    }
+}
diff --git a/src/Web3.php b/src/Web3.php
index 35a2cded..47c01863 100644
--- a/src/Web3.php
+++ b/src/Web3.php
@@ -283,8 +283,6 @@ public function getUtils()
      */
     public function batch($status)
     {
-        $status = is_bool($status);
-
         $this->provider->batch($status);
     }
-}
\ No newline at end of file
+}