diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3fdcde94..56ced4a0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,28 @@
 # bitrix24-php-sdk change log
+## 0.4.0 (16.07.2016)
+* remove all exceptions in namespace `\Exceptions` see issue [Move all exceptions in namespace «Exceptions» #46](https://github.com/mesilov/bitrix24-php-sdk/issues/46)
+* add class `Bitrix24\Exceptions\Bitrix24Exception`
+* add class `Bitrix24\Exceptions\Bitrix24IoException`
+* add class `Bitrix24\Exceptions\Bitrix24EmptyResponseException`
+* add class `Bitrix24\Exceptions\Bitrix24ApiException`
+* add class `Bitrix24\Exceptions\Bitrix24WrongClientException`
+* add class `Bitrix24\Exceptions\Bitrix24MethodNotFoundException`
+* add class `Bitrix24\Exceptions\Bitrix24TokenIsInvalidException`
+* add class `Bitrix24\Exceptions\Bitrix24TokenIsExpiredException`
+* add class `Bitrix24\Exceptions\Bitrix24PortalDeletedException`
+* add class `Bitrix24\Exceptions\Bitrix24PaymentRequiredException`
+* add class `Bitrix24\Exceptions\Bitrix24SecurityException`
+* updated class `Bitrix24\Bitrix24Exception` mark as **deprecated**
+* updated class `Bitrix24\Bitrix24IoException` mark as **deprecated**
+* updated class `Bitrix24\Bitrix24EmptyResponseException` mark as **deprecated**
+* updated class `Bitrix24\Bitrix24ApiException` mark as **deprecated**
+* updated class `Bitrix24\Bitrix24WrongClientException` mark as **deprecated**
+* updated class `Bitrix24\Bitrix24MethodNotFoundException` mark as **deprecated**
+* updated class `Bitrix24\Bitrix24TokenIsInvalid` mark as **deprecated**
+* updated class `Bitrix24\Bitrix24TokenIsExpired` mark as **deprecated**
+* updated class `Bitrix24\Bitrix24PortalDeleted` mark as **deprecated**
+* updated class `Bitrix24\Bitrix24SecurityException` mark as **deprecated**
+
 ## 0.3.4 (06.06.2016)
 * add exception class `Bitrix24EmptyResponseException`
 * in class `Bitrix24` add debug information for some error types
diff --git a/src/bitrix24.php b/src/bitrix24.php
index 753a5179..71232438 100644
--- a/src/bitrix24.php
+++ b/src/bitrix24.php
@@ -3,6 +3,18 @@
 
 use Bitrix24\Contracts\iBitrix24;
 
+use Bitrix24\Exceptions\Bitrix24Exception;
+use Bitrix24\Exceptions\Bitrix24IoException;
+use Bitrix24\Exceptions\Bitrix24PaymentRequiredException;
+use Bitrix24\Exceptions\Bitrix24EmptyResponseException;
+use Bitrix24\Exceptions\Bitrix24ApiException;
+use Bitrix24\Exceptions\Bitrix24TokenIsInvalidException;
+use Bitrix24\Exceptions\Bitrix24WrongClientException;
+use Bitrix24\Exceptions\Bitrix24MethodNotFoundException;
+use Bitrix24\Exceptions\Bitrix24TokenIsExpiredException;
+use Bitrix24\Exceptions\Bitrix24PortalDeletedException;
+use Bitrix24\Exceptions\Bitrix24SecurityException;
+
 use Psr\Log\NullLogger;
 use Psr\Log\LoggerInterface;
 
@@ -13,612 +25,588 @@
  */
 class Bitrix24 implements iBitrix24
 {
-	/**
-	 * @var string SDK version
-	 */
-	const VERSION = '1.0';
-	
-	/**
-	 * @var string OAuth server
-	 */
-	const OAUTH_SERVER = 'oauth.bitrix.info';
-
-	/**
-	 * @var string access token
-	 */
-	protected $accessToken;
-
-	/**
-	 * @var string refresh token
-	 */
-	protected $refreshToken;
-
-	/**
-	 * @var string domain
-	 */
-	protected $domain;
-
-	/**
-	 * @var array scope
-	 */
-	protected $applicationScope = array();
-
-	/**
-	 * @var string application id
-	 */
-	protected $applicationId;
-
-	/**
-	 * @var string application secret
-	 */
-	protected $applicationSecret;
-
-	/**
-	 * @var array raw request, contain all cURL options array and API query
-	 */
-	protected $rawRequest;
-
-	/**
-	 * @var array, contain all api-method parameters, vill be available after call method
-	 */
-	protected $methodParameters;
-
-	/**
-	 * @var array request info data structure акщь curl_getinfo function
-	 */
-	protected $requestInfo;
-
-	/**
-	 * @var bool if true raw response from bitrix24 will be available from method getRawResponse, this is debug mode
-	 */
-	protected $isSaveRawResponse = false;
-
-	/**
-	 * @var array raw response from bitrix24
-	 */
-	protected $rawResponse;
-
-	/**
-	 * @var string redirect URI from application settings
-	 */
-	protected $redirectUri;
-
-	/**
-	 * @var string portal GUID
-	 */
-	protected $memberId;
-
-	/**
-	 * @var array custom options for cURL
-	 */
-	protected $customCurlOptions;
-
-	/**
-	 * @see https://github.com/Seldaek/monolog
-	 * @var \Monolog\Logger PSR-3 compatible logger, use only from wrappers methods log*
-	 */
-	protected $log;
-
-	/**
-	 * @var integer CURL request count retries
-	 */
-	protected $retriesToConnectCount;
-
-	/**
-	 * @var integer retries to connect timeout in microseconds
-	 */
-	protected $retriesToConnectTimeout;
-
-	/**
-	 * Create a object to work with Bitrix24 REST API service
-	 *
-	 * @param bool $isSaveRawResponse - if true raw response from bitrix24 will be available from method getRawResponse, this is debug mode
-	 * @param null|LoggerInterface $obLogger - instance of \Monolog\Logger
-	 *
-	 * @throws Bitrix24Exception
-	 *
-	 * @return Bitrix24
-	 */
-	public function __construct($isSaveRawResponse = false, LoggerInterface $obLogger = null)
-	{
-		if (!extension_loaded('curl'))
-		{
-			throw new Bitrix24Exception('cURL extension must be installed to use this library');
-		}
-		if(!is_bool($isSaveRawResponse))
-		{
-			throw new Bitrix24Exception('isSaveRawResponse flag must be boolean');
-		}
-		$this->isSaveRawResponse = $isSaveRawResponse;
-		if($obLogger !== null)
-		{
-			/**
-			 * @var \Monolog\Logger
-			 */
-			$this->log = clone $obLogger;
-		}
-		else
-		{
-			// dev/null logger
-			/**
-			 * @var \Monolog\Logger
-			 */
-			$this->log = new NullLogger();
-		}
-		$this->setRetriesToConnectCount(1);
-		$this->setRetriesToConnectTimeout(1000000);
-	}
-
-	/**
-	 * Get a random string to sign protected api-call. Use salt for argument "state" in secure api-call
-	 * random string is a result of mt_rand function
-	 *
-	 * @return int
-	 */
-	public function getSecuritySignSalt()
-	{
-		return mt_rand();
-	}
-
-	/**
-	 * Set member ID — portal GUID
-	 *
-	 * @param string $memberId
-	 *
-	 * @throws Bitrix24Exception
-	 *
-	 * @return true
-	 */
-	public function setMemberId($memberId)
-	{
-		if('' === $memberId)
-		{
-			throw new Bitrix24Exception('memberId is empty');
-		}
-		elseif(null === $memberId)
-		{
-			throw new Bitrix24Exception('memberId is null');
-		}
-		$this->memberId = $memberId;
-		return true;
-	}
-
-	/**
-	 * Get memeber ID
-	 *
-	 * @return string | null
-	 */
-	public function getMemberId()
-	{
-		return $this->memberId;
-	}
-
-	/**
-	 * Set redirect URI
-	 *
-	 * @param string $redirectUri
-	 *
-	 * @throws Bitrix24Exception
-	 *
-	 * @return true;
-	 */
-	public function setRedirectUri($redirectUri)
-	{
-		if('' === $redirectUri)
-		{
-			throw new Bitrix24Exception('redirect URI is empty');
-		}
-		$this->redirectUri = $redirectUri;
-		return true;
-	}
-
-	/**
-	 * Get redirect URI
-	 *
-	 * @return string | null
-	 */
-	public function getRedirectUri()
-	{
-		return $this->redirectUri;
-	}
-
-	/**
-	 * Set access token
-	 *
-	 * @param string $accessToken
-	 *
-	 * @throws Bitrix24Exception
-	 *
-	 * @return true
-	 */
-	public function setAccessToken($accessToken)
-	{
-		if('' === $accessToken)
-		{
-			throw new Bitrix24Exception('access token is empty');
-		}
-			$this->accessToken = $accessToken;
-			return true;
-	}
-
-	/**
-	 * Get access token
-	 *
-	 * @return string | null
-	 */
-	public function getAccessToken()
-	{
-		return $this->accessToken;
-	}
-
-	/**
-	 * Set refresh token
-	 *
-	 * @param $refreshToken
-	 *
-	 * @throws Bitrix24Exception
-	 *
-	 * @return true;
-	 */
-	public function setRefreshToken($refreshToken)
-	{
-		if('' === $refreshToken)
-		{
-			throw new Bitrix24Exception('refresh token is empty');
-		}
-		$this->refreshToken = $refreshToken;
-		return true;
-	}
-
-	/**
-	 * Get refresh token
-	 *
-	 * @return string
-	 */
-	public function getRefreshToken()
-	{
-		return $this->refreshToken;
-	}
-
-	/**
-	 * Set domain
-	 *
-	 * @param $domain
-	 *
-	 * @throws Bitrix24Exception
-	 *
-	 * @return true;
-	 */
-	public function setDomain($domain)
-	{
-		if('' === $domain)
-		{
-			throw new Bitrix24Exception('domain is empty');
-		}
-		$this->domain = $domain;
-		return true;
-	}
-
-	/**
-	 * Get domain
-	 *
-	 * @return string | null
-	 */
-	public function getDomain()
-	{
-		return $this->domain;
-	}
-
-	/**
-	 * Set application scope
-	 *
-	 * @param array $applicationScope
-	 *
-	 * @return boolean
-	 *
-	 * @throws Bitrix24Exception
-	 */
-	public function setApplicationScope(array $applicationScope)
-	{
-		if(is_array($applicationScope) && count($applicationScope)> 0)
-		{
-			$this->applicationScope = $applicationScope;
-			return true;
-		}
-		else
-		{
-			throw new Bitrix24Exception('application scope not set');
-		}
-	}
-
-	/**
-	 * Get application scope
-	 *
-	 * @return string
-	 */
-	public function getApplicationScope()
-	{
-		return $this->applicationScope;
-	}
-
-	/**
-	 * Set application id
-	 *
-	 * @param string $applicationId
-	 *
-	 * @throws Bitrix24Exception
-	 *
-	 * @return true;
-	 */
-	public function setApplicationId($applicationId)
-	{
-		if('' === $applicationId)
-		{
-			throw new Bitrix24Exception('application id is empty');
-		}
-		$this->applicationId = $applicationId;
-		return true;
-	}// end of SetApplicationId
-
-	/**
-	 * Get application id
-	 *
-	 * @return string
-	 */
-	public function getApplicationId()
-	{
-		return $this->applicationId;
-	}
-
-	/**
-	 * Set application secret
-	 *
-	 * @param string $applicationSecret
-	 *
-	 * @throws Bitrix24Exception
-	 *
-	 * @return true;
-	 */
-	public function setApplicationSecret($applicationSecret)
-	{
-		if('' === $applicationSecret)
-		{
-			throw new Bitrix24Exception('application secret is empty');
-		}
-		$this->applicationSecret = $applicationSecret;
-		return true;
-	}
-
-	/**
-	 * Get application secret
-	 *
-	 * @return string
-	 */
-	public function getApplicationSecret()
-	{
-		return $this->applicationSecret;
-	}
-
-	/**
-	 * Set custom cURL options, overriding default ones
-	 *
-	 * @link http://php.net/manual/en/function.curl-setopt.php
-	 *
-	 * @param array $options - array(CURLOPT_XXX => value1, CURLOPT_XXX2 => value2,...)
-	 *
-	 * @return bool
-	 */
-	public function setCustomCurlOptions($options)
-	{
-		$this->customCurlOptions = $options;
-
-		return true;
-	}
-
-	/**
-	 * Return raw request, contain all cURL options array and API query. Data available after you try to call method call
-	 * numbers of array keys is const of cURL module. Example: CURLOPT_RETURNTRANSFER = 19913
-	 *
-	 * @return array | null
-	 */
-	public function getRawRequest()
-	{
-		return $this->rawRequest;
-	}
-
-	/**
-	 * Return result from function curl_getinfo. Data available after you try to call method call
-	 *
-	 * @return array | null
-	 */
-	public function getRequestInfo()
-	{
-		return $this->requestInfo;
-	}
-
-	/**
-	 * Return additional parameters of last api-call. Data available after you try to call method call
-	 *
-	 * @return array | null
-	 */
-	public function getMethodParameters()
-	{
-		return $this->methodParameters;
-	}
-
-	/**
-	 * get error context
-	 *
-	 * @return array
-	 */
-	protected function getErrorContext()
-	{
-		return array(
-			// portal specific settings
-			'B24_DOMAIN' => $this->getDomain(),
-			'B24_MEMBER_ID' => $this->getMemberId(),
-			'B24_ACCESS_TOKEN' => $this->getAccessToken(),
-			'B24_REFRESH_TOKEN' => $this->getRefreshToken(),
-			// application settings
-			'APPLICATION_SCOPE' => $this->getApplicationScope(),
-			'APPLICATION_ID' => $this->getApplicationId(),
-			'APPLICATION_SECRET' => $this->getApplicationSecret(),
-			'REDIRECT_URI' => $this->getRedirectUri(),
-			// network
-			'RAW_REQUEST' => $this->getRawRequest(),
-			'CURL_REQUEST_INFO' => $this->getRequestInfo(),
-			'RAW_RESPONSE' => $this->getRawResponse()
-		);
-	}
-
-	/**
-	 * Execute a request API to Bitrix24 using cURL
-	 *
-	 * @param string $url
-	 * @param array $additionalParameters
-	 *
-	 * @throws Bitrix24Exception
-	 * @throws Bitrix24PortalDeleted
-	 * @throws Bitrix24IoException
-	 * @throws Bitrix24EmptyResponseException
-	 *
-	 * @return array
-	 */
-	protected function executeRequest($url, array $additionalParameters = array())
-	{
-		$retryableErrorCodes = array(
-			CURLE_COULDNT_RESOLVE_HOST,
-			CURLE_COULDNT_CONNECT,
-			CURLE_HTTP_NOT_FOUND,
-			CURLE_READ_ERROR,
-			CURLE_OPERATION_TIMEOUTED,
-			CURLE_HTTP_POST_ERROR,
-			CURLE_SSL_CONNECT_ERROR
-		);
-
-		$curlOptions = array(
-			CURLOPT_RETURNTRANSFER => true,
-			CURLINFO_HEADER_OUT => true,
-			CURLOPT_VERBOSE => true,
-			CURLOPT_CONNECTTIMEOUT => 5,
-			CURLOPT_TIMEOUT        => 5,
-			CURLOPT_USERAGENT => strtolower(__CLASS__.'-PHP-SDK/v'.self::VERSION),
-			CURLOPT_POST => true,
-			CURLOPT_POSTFIELDS => http_build_query($additionalParameters),
-			CURLOPT_URL => $url
-		);
-
-		if(is_array($this->customCurlOptions)) {
-			foreach($this->customCurlOptions as $customCurlOptionKey => $customCurlOptionValue) {
-				$curlOptions[$customCurlOptionKey] = $customCurlOptionValue;
-			}
-		}
-
-		$this->rawRequest = $curlOptions;
-		$curl = curl_init();
-		curl_setopt_array($curl, $curlOptions);
-
-		$curlResult = false;
-		$retriesCnt = $this->retriesToConnectCount;
-		while($retriesCnt--){
-			$this->log->debug(sprintf('try [%s] to connect to host [%s]', $retriesCnt, $this->getDomain()));
-			$curlResult = curl_exec($curl);
-			// handling network I/O errors
-			if(false === $curlResult)
-			{
-				$curlErrorNumber = curl_errno($curl);
-				$errorMsg = sprintf('in try[%s] cURL error (code %s): %s'.PHP_EOL, $retriesCnt, $curlErrorNumber, curl_error($curl));
-				if (false === in_array($curlErrorNumber, $retryableErrorCodes, true) || !$retriesCnt) {
-					$this->log->error($errorMsg, $this->getErrorContext());
-					curl_close($curl);
-					throw new Bitrix24IoException($errorMsg);
-				}
-				else
-				{
-					$this->log->warning($errorMsg, $this->getErrorContext());
-				}
-				usleep($this->getRetriesToConnectTimeout());
-				continue;
-			}
-			$this->requestInfo = curl_getinfo($curl);
-			$this->rawResponse = $curlResult;
-			$this->log->debug('cURL request info', array($this->getRequestInfo()));
-			curl_close($curl);
-			break;
-		}
-
-		// handling URI level resource errors
-		switch ($this->requestInfo['http_code'])
-		{
-			case 403:
-				$errorMsg = sprintf('portal [%s] deleted, query aborted', $this->getDomain());
-				$this->log->error($errorMsg, $this->getErrorContext());
-				throw new Bitrix24PortalDeleted($errorMsg);
-				break;
-		}
-		
-		// handling server-side API errors: empty response from bitrix24 portal 
-		if($curlResult === '')
-		{
-			$errorMsg = sprintf('empty response from portal [%s]', $this->getDomain());
-			$this->log->error($errorMsg, $this->getErrorContext());
-			throw new Bitrix24EmptyResponseException($errorMsg);
-		}
-
-		// handling json_decode errors
-		$jsonResult = json_decode($curlResult, true);
-		unset($curlResult);
-		$jsonErrorCode = json_last_error();
-		if(null === $jsonResult && (JSON_ERROR_NONE !== $jsonErrorCode))
-		{
-			/**
-			 * @todo add function json_last_error_msg()
-			 */
-			$errorMsg = 'fatal error in function json_decode.'.PHP_EOL.'Error code: '.$jsonErrorCode.PHP_EOL;
-			$this->log->error($errorMsg, $this->getErrorContext());
-			throw new Bitrix24Exception($errorMsg);
-		}
-		return $jsonResult;
-	}
-
-	/**
-	 * Execute Bitrix24 REST API method
-	 *
-	 * @param string $methodName
-	 * @param array $additionalParameters
-	 *
-	 * @throws Bitrix24Exception
-	 * @throws Bitrix24ApiException
-	 * @throws Bitrix24TokenIsInvalid
-	 * @throws Bitrix24TokenIsExpired
-	 * @throws Bitrix24WrongClientException
-	 * @throws Bitrix24MethodNotFoundException
-	 * @throws Bitrix24SecurityException
-	 * @throws Bitrix24PortalDeleted
-	 * @throws Bitrix24IoException
-	 * @throws Bitrix24EmptyResponseException
-	 *
-	 * @return array
-	 */
-	public function call($methodName, array $additionalParameters = array())
-	{
+    /**
+     * @var string SDK version
+     */
+    const VERSION = '1.0';
+
+    /**
+     * @var string OAuth server
+     */
+    const OAUTH_SERVER = 'oauth.bitrix.info';
+
+    /**
+     * @var string access token
+     */
+    protected $accessToken;
+
+    /**
+     * @var string refresh token
+     */
+    protected $refreshToken;
+
+    /**
+     * @var string domain
+     */
+    protected $domain;
+
+    /**
+     * @var array scope
+     */
+    protected $applicationScope = array();
+
+    /**
+     * @var string application id
+     */
+    protected $applicationId;
+
+    /**
+     * @var string application secret
+     */
+    protected $applicationSecret;
+
+    /**
+     * @var array raw request, contain all cURL options array and API query
+     */
+    protected $rawRequest;
+
+    /**
+     * @var array, contain all api-method parameters, vill be available after call method
+     */
+    protected $methodParameters;
+
+    /**
+     * @var array request info data structure акщь curl_getinfo function
+     */
+    protected $requestInfo;
+
+    /**
+     * @var bool if true raw response from bitrix24 will be available from method getRawResponse, this is debug mode
+     */
+    protected $isSaveRawResponse = false;
+
+    /**
+     * @var array raw response from bitrix24
+     */
+    protected $rawResponse;
+
+    /**
+     * @var string redirect URI from application settings
+     */
+    protected $redirectUri;
+
+    /**
+     * @var string portal GUID
+     */
+    protected $memberId;
+
+    /**
+     * @var array custom options for cURL
+     */
+    protected $customCurlOptions;
+
+    /**
+     * @see https://github.com/Seldaek/monolog
+     * @var \Monolog\Logger PSR-3 compatible logger, use only from wrappers methods log*
+     */
+    protected $log;
+
+    /**
+     * @var integer CURL request count retries
+     */
+    protected $retriesToConnectCount;
+
+    /**
+     * @var integer retries to connect timeout in microseconds
+     */
+    protected $retriesToConnectTimeout;
+
+    /**
+     * Create a object to work with Bitrix24 REST API service
+     *
+     * @param bool $isSaveRawResponse - if true raw response from bitrix24 will be available from method getRawResponse, this is debug mode
+     * @param null|LoggerInterface $obLogger - instance of \Monolog\Logger
+     *
+     * @throws Bitrix24Exception
+     *
+     * @return Bitrix24
+     */
+    public function __construct($isSaveRawResponse = false, LoggerInterface $obLogger = null)
+    {
+        if (!extension_loaded('curl')) {
+            throw new Bitrix24Exception('cURL extension must be installed to use this library');
+        }
+        if (!is_bool($isSaveRawResponse)) {
+            throw new Bitrix24Exception('isSaveRawResponse flag must be boolean');
+        }
+        $this->isSaveRawResponse = $isSaveRawResponse;
+        if ($obLogger !== null) {
+            /**
+             * @var \Monolog\Logger
+             */
+            $this->log = clone $obLogger;
+        } else {
+            // dev/null logger
+            /**
+             * @var \Monolog\Logger
+             */
+            $this->log = new NullLogger();
+        }
+        $this->setRetriesToConnectCount(1);
+        $this->setRetriesToConnectTimeout(1000000);
+    }
+
+    /**
+     * Get a random string to sign protected api-call. Use salt for argument "state" in secure api-call
+     * random string is a result of mt_rand function
+     *
+     * @return int
+     */
+    public function getSecuritySignSalt()
+    {
+        return mt_rand();
+    }
+
+    /**
+     * Set member ID — portal GUID
+     *
+     * @param string $memberId
+     *
+     * @throws Bitrix24Exception
+     *
+     * @return true
+     */
+    public function setMemberId($memberId)
+    {
+        if ('' === $memberId) {
+            throw new Bitrix24Exception('memberId is empty');
+        } elseif (null === $memberId) {
+            throw new Bitrix24Exception('memberId is null');
+        }
+        $this->memberId = $memberId;
+        return true;
+    }
+
+    /**
+     * Get memeber ID
+     *
+     * @return string | null
+     */
+    public function getMemberId()
+    {
+        return $this->memberId;
+    }
+
+    /**
+     * Set redirect URI
+     *
+     * @param string $redirectUri
+     *
+     * @throws Bitrix24Exception
+     *
+     * @return true;
+     */
+    public function setRedirectUri($redirectUri)
+    {
+        if ('' === $redirectUri) {
+            throw new Bitrix24Exception('redirect URI is empty');
+        }
+        $this->redirectUri = $redirectUri;
+        return true;
+    }
+
+    /**
+     * Get redirect URI
+     *
+     * @return string | null
+     */
+    public function getRedirectUri()
+    {
+        return $this->redirectUri;
+    }
+
+    /**
+     * Set access token
+     *
+     * @param string $accessToken
+     *
+     * @throws Bitrix24Exception
+     *
+     * @return true
+     */
+    public function setAccessToken($accessToken)
+    {
+        if ('' === $accessToken) {
+            throw new Bitrix24Exception('access token is empty');
+        }
+        $this->accessToken = $accessToken;
+        return true;
+    }
+
+    /**
+     * Get access token
+     *
+     * @return string | null
+     */
+    public function getAccessToken()
+    {
+        return $this->accessToken;
+    }
+
+    /**
+     * Set refresh token
+     *
+     * @param $refreshToken
+     *
+     * @throws Bitrix24Exception
+     *
+     * @return true;
+     */
+    public function setRefreshToken($refreshToken)
+    {
+        if ('' === $refreshToken) {
+            throw new Bitrix24Exception('refresh token is empty');
+        }
+        $this->refreshToken = $refreshToken;
+        return true;
+    }
+
+    /**
+     * Get refresh token
+     *
+     * @return string
+     */
+    public function getRefreshToken()
+    {
+        return $this->refreshToken;
+    }
+
+    /**
+     * Set domain
+     *
+     * @param $domain
+     *
+     * @throws Bitrix24Exception
+     *
+     * @return true;
+     */
+    public function setDomain($domain)
+    {
+        if ('' === $domain) {
+            throw new Bitrix24Exception('domain is empty');
+        }
+        $this->domain = $domain;
+        return true;
+    }
+
+    /**
+     * Get domain
+     *
+     * @return string | null
+     */
+    public function getDomain()
+    {
+        return $this->domain;
+    }
+
+    /**
+     * Set application scope
+     *
+     * @param array $applicationScope
+     *
+     * @return boolean
+     *
+     * @throws Bitrix24Exception
+     */
+    public function setApplicationScope(array $applicationScope)
+    {
+        if (is_array($applicationScope) && count($applicationScope) > 0) {
+            $this->applicationScope = $applicationScope;
+            return true;
+        } else {
+            throw new Bitrix24Exception('application scope not set');
+        }
+    }
+
+    /**
+     * Get application scope
+     *
+     * @return string
+     */
+    public function getApplicationScope()
+    {
+        return $this->applicationScope;
+    }
+
+    /**
+     * Set application id
+     *
+     * @param string $applicationId
+     *
+     * @throws Bitrix24Exception
+     *
+     * @return true;
+     */
+    public function setApplicationId($applicationId)
+    {
+        if ('' === $applicationId) {
+            throw new Bitrix24Exception('application id is empty');
+        }
+        $this->applicationId = $applicationId;
+        return true;
+    }// end of SetApplicationId
+
+    /**
+     * Get application id
+     *
+     * @return string
+     */
+    public function getApplicationId()
+    {
+        return $this->applicationId;
+    }
+
+    /**
+     * Set application secret
+     *
+     * @param string $applicationSecret
+     *
+     * @throws Bitrix24Exception
+     *
+     * @return true;
+     */
+    public function setApplicationSecret($applicationSecret)
+    {
+        if ('' === $applicationSecret) {
+            throw new Bitrix24Exception('application secret is empty');
+        }
+        $this->applicationSecret = $applicationSecret;
+        return true;
+    }
+
+    /**
+     * Get application secret
+     *
+     * @return string
+     */
+    public function getApplicationSecret()
+    {
+        return $this->applicationSecret;
+    }
+
+    /**
+     * Set custom cURL options, overriding default ones
+     *
+     * @link http://php.net/manual/en/function.curl-setopt.php
+     *
+     * @param array $options - array(CURLOPT_XXX => value1, CURLOPT_XXX2 => value2,...)
+     *
+     * @return bool
+     */
+    public function setCustomCurlOptions($options)
+    {
+        $this->customCurlOptions = $options;
+
+        return true;
+    }
+
+    /**
+     * Return raw request, contain all cURL options array and API query. Data available after you try to call method call
+     * numbers of array keys is const of cURL module. Example: CURLOPT_RETURNTRANSFER = 19913
+     *
+     * @return array | null
+     */
+    public function getRawRequest()
+    {
+        return $this->rawRequest;
+    }
+
+    /**
+     * Return result from function curl_getinfo. Data available after you try to call method call
+     *
+     * @return array | null
+     */
+    public function getRequestInfo()
+    {
+        return $this->requestInfo;
+    }
+
+    /**
+     * Return additional parameters of last api-call. Data available after you try to call method call
+     *
+     * @return array | null
+     */
+    public function getMethodParameters()
+    {
+        return $this->methodParameters;
+    }
+
+    /**
+     * get error context
+     *
+     * @return array
+     */
+    protected function getErrorContext()
+    {
+        return array(
+            // portal specific settings
+            'B24_DOMAIN' => $this->getDomain(),
+            'B24_MEMBER_ID' => $this->getMemberId(),
+            'B24_ACCESS_TOKEN' => $this->getAccessToken(),
+            'B24_REFRESH_TOKEN' => $this->getRefreshToken(),
+            // application settings
+            'APPLICATION_SCOPE' => $this->getApplicationScope(),
+            'APPLICATION_ID' => $this->getApplicationId(),
+            'APPLICATION_SECRET' => $this->getApplicationSecret(),
+            'REDIRECT_URI' => $this->getRedirectUri(),
+            // network
+            'RAW_REQUEST' => $this->getRawRequest(),
+            'CURL_REQUEST_INFO' => $this->getRequestInfo(),
+            'RAW_RESPONSE' => $this->getRawResponse()
+        );
+    }
+
+    /**
+     * Execute a request API to Bitrix24 using cURL
+     *
+     * @param string $url
+     * @param array $additionalParameters
+     *
+     * @throws Bitrix24Exception
+     * @throws Bitrix24PortalDeletedException
+     * @throws Bitrix24IoException
+     * @throws Bitrix24EmptyResponseException
+     *
+     * @return array
+     */
+    protected function executeRequest($url, array $additionalParameters = array())
+    {
+        $retryableErrorCodes = array(
+            CURLE_COULDNT_RESOLVE_HOST,
+            CURLE_COULDNT_CONNECT,
+            CURLE_HTTP_NOT_FOUND,
+            CURLE_READ_ERROR,
+            CURLE_OPERATION_TIMEOUTED,
+            CURLE_HTTP_POST_ERROR,
+            CURLE_SSL_CONNECT_ERROR
+        );
+
+        $curlOptions = array(
+            CURLOPT_RETURNTRANSFER => true,
+            CURLINFO_HEADER_OUT => true,
+            CURLOPT_VERBOSE => true,
+            CURLOPT_CONNECTTIMEOUT => 5,
+            CURLOPT_TIMEOUT => 5,
+            CURLOPT_USERAGENT => strtolower(__CLASS__ . '-PHP-SDK/v' . self::VERSION),
+            CURLOPT_POST => true,
+            CURLOPT_POSTFIELDS => http_build_query($additionalParameters),
+            CURLOPT_URL => $url
+        );
+
+        if (is_array($this->customCurlOptions)) {
+            foreach ($this->customCurlOptions as $customCurlOptionKey => $customCurlOptionValue) {
+                $curlOptions[$customCurlOptionKey] = $customCurlOptionValue;
+            }
+        }
+
+        $this->rawRequest = $curlOptions;
+        $curl = curl_init();
+        curl_setopt_array($curl, $curlOptions);
+
+        $curlResult = false;
+        $retriesCnt = $this->retriesToConnectCount;
+        while ($retriesCnt--) {
+            $this->log->debug(sprintf('try [%s] to connect to host [%s]', $retriesCnt, $this->getDomain()));
+            $curlResult = curl_exec($curl);
+            // handling network I/O errors
+            if (false === $curlResult) {
+                $curlErrorNumber = curl_errno($curl);
+                $errorMsg = sprintf('in try[%s] cURL error (code %s): %s' . PHP_EOL, $retriesCnt, $curlErrorNumber,
+                    curl_error($curl));
+                if (false === in_array($curlErrorNumber, $retryableErrorCodes, true) || !$retriesCnt) {
+                    $this->log->error($errorMsg, $this->getErrorContext());
+                    curl_close($curl);
+                    throw new Bitrix24IoException($errorMsg);
+                } else {
+                    $this->log->warning($errorMsg, $this->getErrorContext());
+                }
+                usleep($this->getRetriesToConnectTimeout());
+                continue;
+            }
+            $this->requestInfo = curl_getinfo($curl);
+            $this->rawResponse = $curlResult;
+            $this->log->debug('cURL request info', array($this->getRequestInfo()));
+            curl_close($curl);
+            break;
+        }
+
+        // handling URI level resource errors
+        switch ($this->requestInfo['http_code']) {
+            case 403:
+                $errorMsg = sprintf('portal [%s] deleted, query aborted', $this->getDomain());
+                $this->log->error($errorMsg, $this->getErrorContext());
+                throw new Bitrix24PortalDeletedException($errorMsg);
+                break;
+        }
+
+        // handling server-side API errors: empty response from bitrix24 portal
+        if ($curlResult === '') {
+            $errorMsg = sprintf('empty response from portal [%s]', $this->getDomain());
+            $this->log->error($errorMsg, $this->getErrorContext());
+            throw new Bitrix24EmptyResponseException($errorMsg);
+        }
+
+        // handling json_decode errors
+        $jsonResult = json_decode($curlResult, true);
+        unset($curlResult);
+        $jsonErrorCode = json_last_error();
+        if (null === $jsonResult && (JSON_ERROR_NONE !== $jsonErrorCode)) {
+            /**
+             * @todo add function json_last_error_msg()
+             */
+            $errorMsg = 'fatal error in function json_decode.' . PHP_EOL . 'Error code: ' . $jsonErrorCode . PHP_EOL;
+            $this->log->error($errorMsg, $this->getErrorContext());
+            throw new Bitrix24Exception($errorMsg);
+        }
+        return $jsonResult;
+    }
+
+    /**
+     * Execute Bitrix24 REST API method
+     *
+     * @param string $methodName
+     * @param array $additionalParameters
+     *
+     * @throws Bitrix24Exception
+     * @throws Bitrix24ApiException
+     * @throws Bitrix24TokenIsInvalidException
+     * @throws Bitrix24TokenIsExpiredException
+     * @throws Bitrix24WrongClientException
+     * @throws Bitrix24MethodNotFoundException
+     * @throws Bitrix24PaymentRequiredException
+     * @throws Bitrix24SecurityException
+     * @throws Bitrix24PortalDeletedException
+     * @throws Bitrix24IoException
+     * @throws Bitrix24EmptyResponseException
+     *
+     * @return array
+     */
+    public function call($methodName, array $additionalParameters = array())
+    {
 //		$arAuthServerMethods = array(
 //			'app.info',
 //			'app.stat'
 //		);
 
-		if(null === $this->getDomain())
-		{
-			throw new Bitrix24Exception('domain not found, you must call setDomain method before');
-		}
-		if(null === $this->getAccessToken())
-		{
-			throw new Bitrix24Exception('access token not found, you must call setAccessToken method before');
-		}
-		if('' === $methodName)
-		{
-			throw new Bitrix24Exception('method name not found, you must set method name');
-		}
+        if (null === $this->getDomain()) {
+            throw new Bitrix24Exception('domain not found, you must call setDomain method before');
+        }
+        if (null === $this->getAccessToken()) {
+            throw new Bitrix24Exception('access token not found, you must call setAccessToken method before');
+        }
+        if ('' === $methodName) {
+            throw new Bitrix24Exception('method name not found, you must set method name');
+        }
 
 //		if(in_array(strtolower($methodName), $arAuthServerMethods, true))
 //		{
@@ -626,210 +614,198 @@ public function call($methodName, array $additionalParameters = array())
 //		}
 //		else
 //		{
-			$url = 'https://'.$this->domain.'/rest/'.$methodName;
+        $url = 'https://' . $this->domain . '/rest/' . $methodName;
 //		}
-		$additionalParameters['auth'] = $this->accessToken;
-		// save method parameters for debug
-		$this->methodParameters = $additionalParameters;
-		// is secure api-call?
-		$isSecureCall = false;
-		if(array_key_exists('state', $additionalParameters))
-		{
-			$isSecureCall = true;
-		}
-		// execute request
-		$this->log->info('call bitrix24 method', array(
-			'BITRIX24_DOMAIN' => $this->domain,
-			'METHOD_NAME' => $methodName,
-			'METHOD_PARAMETERS' => $additionalParameters
-		));
-		$requestResult = $this->executeRequest($url, $additionalParameters);
-		// check errors and throw exception if errors exists
-		$this->handleBitrix24APILevelErrors($requestResult, $methodName, $additionalParameters);
-		// handling security sign for secure api-call
-		if($isSecureCall)
-		{
-			if(array_key_exists('signature', $requestResult))
-			{
-				// check signature structure
-				if (strpos($requestResult['signature'], '.') === false)
-				{
-					throw new Bitrix24SecurityException('security signature is corrupted');
-				}
-				if(null === $this->getMemberId())
-				{
-					throw new Bitrix24Exception('member-id not found, you must call setMemberId method before');
-				}
-				if(null === $this->getApplicationSecret())
-				{
-					throw new Bitrix24Exception('application secret not found, you must call setApplicationSecret method before');
-				}
-				// prepare
-				$key = md5($this->getMemberId().$this->getApplicationSecret());
-				$delimiterPosition = strrpos($requestResult['signature'], '.');
-				$dataToDecode = substr($requestResult['signature'], 0, $delimiterPosition);
-				$signature = base64_decode(substr($requestResult['signature'], $delimiterPosition + 1));
-				// compare signatures
-				$hash = hash_hmac('sha256', $dataToDecode, $key, true);
-				if ($hash !== $signature)
-				{
-					throw new Bitrix24SecurityException('security signatures not same, bad request');
-				}
-				// decode
-				$arClearData = json_decode(base64_decode($dataToDecode), true);
-				// handling json_decode errors
-				$jsonErrorCode = json_last_error();
-				if(null === $arClearData && (JSON_ERROR_NONE !== $jsonErrorCode))
-				{
-					/**
-					 * @todo add function json_last_error_msg()
-					 */
-					$errorMsg = 'fatal error in function json_decode.'.PHP_EOL.'Error code: '.$jsonErrorCode.PHP_EOL;
-					throw new Bitrix24Exception($errorMsg);
-				}
-				// merge dirty and clear data
-				unset($arClearData['state']);
-				$requestResult ['result'] = array_merge($requestResult ['result'], $arClearData);
-			}
-			else
-			{
-				throw new Bitrix24SecurityException('security signature in api-response not found');
-			}
-		}
-		return $requestResult;
-	}
-
-	/**
-	 * Handling bitrix24 api-level errors
-	 *
-	 * @param $arRequestResult
-	 * @param $methodName
-	 * @param array $additionalParameters
-	 *
-	 * @return null
-	 *
-	 * @throws Bitrix24ApiException
-	 * @throws Bitrix24TokenIsInvalid
-	 * @throws Bitrix24TokenIsExpired
-	 * @throws Bitrix24WrongClientException
-	 * @throws Bitrix24MethodNotFoundException
-	 */
-	protected function handleBitrix24APILevelErrors($arRequestResult, $methodName, array $additionalParameters = array())
-	{
-		if (array_key_exists('error', $arRequestResult))
-		{
-			$errorMsg =  sprintf('%s - %s in call [%s] for domain [%s]',
-				$arRequestResult['error'],
-				(array_key_exists('error_description', $arRequestResult) ? $arRequestResult['error_description'] : ''),
-				$methodName,
-				$this->getDomain());
-			$this->log->error($errorMsg, $this->getErrorContext());
-			// throw specific API-level exceptions
-			switch(strtoupper(trim($arRequestResult['error'])))
-			{
-				case 'WRONG_CLIENT':
-					throw new Bitrix24WrongClientException($errorMsg);
-				case 'ERROR_METHOD_NOT_FOUND':
-					throw new Bitrix24MethodNotFoundException($errorMsg);
-				case 'INVALID_TOKEN':
-					throw new Bitrix24TokenIsInvalid($errorMsg);
-				case 'EXPIRED_TOKEN':
-					throw new Bitrix24TokenIsExpired($errorMsg);
-				default:
-					throw new Bitrix24ApiException($errorMsg);
-			}
-		}
-		return null;
-	}
-
-	/**
-	 * Get raw response from Bitrix24 before json_decode call, method available only in debug mode.
-	 * To activate debug mode you must before set to true flag isSaveRawResponse in class construct
-	 *
-	 * @return string | null
-	 */
-	public function getRawResponse()
-	{
-		return $this->rawResponse;
-	}
-
-	/**
-	 * Get new access token
-	 *
-	 * @return array
-	 *
-	 * @throws Bitrix24Exception
-	 * @throws Bitrix24ApiException
-	 * @throws Bitrix24TokenIsInvalid
-	 * @throws Bitrix24TokenIsExpired
-	 * @throws Bitrix24WrongClientException
-	 * @throws Bitrix24MethodNotFoundException
-	 * @throws Bitrix24PortalDeleted
-	 * @throws Bitrix24IoException
-	 * @throws Bitrix24EmptyResponseException
-	 *
-	 */
-	public function getNewAccessToken()
-	{
-		$applicationId = $this->getApplicationId();
-		$applicationSecret = $this->getApplicationSecret();
-		$refreshToken = $this->getRefreshToken();
-		$applicationScope = $this->getApplicationScope();
-		$redirectUri = $this->getRedirectUri();
-
-		if(null === $applicationId)
-		{
-			throw new Bitrix24Exception('application id not found, you must call setApplicationId method before');
-		}
-		elseif(null === $applicationSecret)
-		{
-			throw new Bitrix24Exception('application id not found, you must call setApplicationSecret method before');
-		}
-		elseif(null === $refreshToken)
-		{
-			throw new Bitrix24Exception('application id not found, you must call setRefreshToken method before');
-		}
-		elseif(0 === count($applicationScope))
-		{
-			throw new Bitrix24Exception('application scope not found, you must call setApplicationScope method before');
-		}
-		elseif(null === $redirectUri)
-		{
-			throw new Bitrix24Exception('application redirect URI not found, you must call setRedirectUri method before');
-		}
+        $additionalParameters['auth'] = $this->accessToken;
+        // save method parameters for debug
+        $this->methodParameters = $additionalParameters;
+        // is secure api-call?
+        $isSecureCall = false;
+        if (array_key_exists('state', $additionalParameters)) {
+            $isSecureCall = true;
+        }
+        // execute request
+        $this->log->info('call bitrix24 method', array(
+            'BITRIX24_DOMAIN' => $this->domain,
+            'METHOD_NAME' => $methodName,
+            'METHOD_PARAMETERS' => $additionalParameters
+        ));
+        $requestResult = $this->executeRequest($url, $additionalParameters);
+        // check errors and throw exception if errors exists
+        $this->handleBitrix24APILevelErrors($requestResult, $methodName, $additionalParameters);
+        // handling security sign for secure api-call
+        if ($isSecureCall) {
+            if (array_key_exists('signature', $requestResult)) {
+                // check signature structure
+                if (strpos($requestResult['signature'], '.') === false) {
+                    throw new Bitrix24SecurityException('security signature is corrupted');
+                }
+                if (null === $this->getMemberId()) {
+                    throw new Bitrix24Exception('member-id not found, you must call setMemberId method before');
+                }
+                if (null === $this->getApplicationSecret()) {
+                    throw new Bitrix24Exception('application secret not found, you must call setApplicationSecret method before');
+                }
+                // prepare
+                $key = md5($this->getMemberId() . $this->getApplicationSecret());
+                $delimiterPosition = strrpos($requestResult['signature'], '.');
+                $dataToDecode = substr($requestResult['signature'], 0, $delimiterPosition);
+                $signature = base64_decode(substr($requestResult['signature'], $delimiterPosition + 1));
+                // compare signatures
+                $hash = hash_hmac('sha256', $dataToDecode, $key, true);
+                if ($hash !== $signature) {
+                    throw new Bitrix24SecurityException('security signatures not same, bad request');
+                }
+                // decode
+                $arClearData = json_decode(base64_decode($dataToDecode), true);
+                // handling json_decode errors
+                $jsonErrorCode = json_last_error();
+                if (null === $arClearData && (JSON_ERROR_NONE !== $jsonErrorCode)) {
+                    /**
+                     * @todo add function json_last_error_msg()
+                     */
+                    $errorMsg = 'fatal error in function json_decode.' . PHP_EOL . 'Error code: ' . $jsonErrorCode . PHP_EOL;
+                    throw new Bitrix24Exception($errorMsg);
+                }
+                // merge dirty and clear data
+                unset($arClearData['state']);
+                $requestResult ['result'] = array_merge($requestResult ['result'], $arClearData);
+            } else {
+                throw new Bitrix24SecurityException('security signature in api-response not found');
+            }
+        }
+        return $requestResult;
+    }
+
+    /**
+     * Handling bitrix24 api-level errors
+     *
+     * @param $arRequestResult
+     * @param $methodName
+     * @param array $additionalParameters
+     *
+     * @return null
+     *
+     * @throws Bitrix24ApiException
+     * @throws Bitrix24TokenIsInvalidException
+     * @throws Bitrix24TokenIsExpiredException
+     * @throws Bitrix24WrongClientException
+     * @throws Bitrix24MethodNotFoundException
+     * @throws Bitrix24PaymentRequiredException
+     */
+    protected function handleBitrix24APILevelErrors(
+        $arRequestResult,
+        $methodName,
+        array $additionalParameters = array()
+    ) {
+        if (array_key_exists('error', $arRequestResult)) {
+            $errorMsg = sprintf('%s - %s in call [%s] for domain [%s]',
+                $arRequestResult['error'],
+                (array_key_exists('error_description', $arRequestResult) ? $arRequestResult['error_description'] : ''),
+                $methodName,
+                $this->getDomain());
+            $this->log->error($errorMsg, $this->getErrorContext());
+            // throw specific API-level exceptions
+            switch (strtoupper(trim($arRequestResult['error']))) {
+                case 'WRONG_CLIENT':
+                case 'ERROR_OAUTH':
+                    throw new Bitrix24WrongClientException($errorMsg);
+                case 'ERROR_METHOD_NOT_FOUND':
+                    throw new Bitrix24MethodNotFoundException($errorMsg);
+                case 'INVALID_TOKEN':
+                case 'INVALID_GRANT':
+                    throw new Bitrix24TokenIsInvalidException($errorMsg);
+                case 'EXPIRED_TOKEN':
+                    throw new Bitrix24TokenIsExpiredException($errorMsg);
+                case 'PAYMENT_REQUIRED':
+                    throw new Bitrix24PaymentRequiredException($errorMsg);
+                default:
+                    throw new Bitrix24ApiException($errorMsg);
+            }
+        }
+        return null;
+    }
+
+    /**
+     * Get raw response from Bitrix24 before json_decode call, method available only in debug mode.
+     * To activate debug mode you must before set to true flag isSaveRawResponse in class construct
+     *
+     * @return string | null
+     */
+    public function getRawResponse()
+    {
+        return $this->rawResponse;
+    }
+
+    /**
+     * Get new access token
+     *
+     * @return array
+     *
+     * @throws Bitrix24Exception
+     * @throws Bitrix24ApiException
+     * @throws Bitrix24PortalDeletedException
+     * @throws Bitrix24IoException
+     * @throws Bitrix24EmptyResponseException
+     * @throws Bitrix24TokenIsInvalidException
+     * @throws Bitrix24TokenIsExpiredException
+     * @throws Bitrix24WrongClientException
+     * @throws Bitrix24MethodNotFoundException
+     * @throws Bitrix24PaymentRequiredException
+     *
+     */
+    public function getNewAccessToken()
+    {
+        $applicationId = $this->getApplicationId();
+        $applicationSecret = $this->getApplicationSecret();
+        $refreshToken = $this->getRefreshToken();
+        $applicationScope = $this->getApplicationScope();
+        $redirectUri = $this->getRedirectUri();
+
+        if (null === $applicationId) {
+            throw new Bitrix24Exception('application id not found, you must call setApplicationId method before');
+        } elseif (null === $applicationSecret) {
+            throw new Bitrix24Exception('application id not found, you must call setApplicationSecret method before');
+        } elseif (null === $refreshToken) {
+            throw new Bitrix24Exception('application id not found, you must call setRefreshToken method before');
+        } elseif (0 === count($applicationScope)) {
+            throw new Bitrix24Exception('application scope not found, you must call setApplicationScope method before');
+        } elseif (null === $redirectUri) {
+            throw new Bitrix24Exception('application redirect URI not found, you must call setRedirectUri method before');
+        }
 
 //		$url = 'https://'.self::OAUTH_SERVER.'/oauth/token/'.
-		$url = 'https://'.$this->getDomain().'/oauth/token/'.
-			'?client_id='.urlencode($applicationId).
-			'&grant_type=refresh_token'.
-			'&client_secret='.$applicationSecret.
-			'&refresh_token='.$refreshToken.
-			'&redirect_uri='.urlencode($redirectUri);
-		$requestResult = $this->executeRequest($url);
-		// handling bitrix24 api-level errors
-		$this->handleBitrix24APILevelErrors($requestResult, 'refresh access token');
-		return $requestResult;
-	}
-
-	/**
-	 * Authorize and get first access token
-	 *
-	 * @param $code
-	 *
-	 * @return array
-	 *
-	 * @throws Bitrix24ApiException
-	 * @throws Bitrix24Exception
-	 * @throws Bitrix24IoException
-	 * @throws Bitrix24MethodNotFoundException
-	 * @throws Bitrix24TokenIsExpired
-	 * @throws Bitrix24TokenIsInvalid
-	 * @throws Bitrix24WrongClientException
-	 * @throws Bitrix24PortalDeleted
-	 * @throws Bitrix24IoException
-	 * @throws Bitrix24EmptyResponseException
-	 *
-	 */
+        $url = 'https://' . $this->getDomain() . '/oauth/token/' .
+            '?client_id=' . urlencode($applicationId) .
+            '&grant_type=refresh_token' .
+            '&client_secret=' . $applicationSecret .
+            '&refresh_token=' . $refreshToken .
+            '&redirect_uri=' . urlencode($redirectUri);
+        $requestResult = $this->executeRequest($url);
+        // handling bitrix24 api-level errors
+        $this->handleBitrix24APILevelErrors($requestResult, 'refresh access token');
+        return $requestResult;
+    }
+
+    /**
+     * Authorize and get first access token
+     *
+     * @param $code
+     *
+     * @return array
+     *
+     * @throws Bitrix24Exception
+     * @throws Bitrix24ApiException
+     * @throws Bitrix24PortalDeletedException
+     * @throws Bitrix24IoException
+     * @throws Bitrix24EmptyResponseException
+     * @throws Bitrix24TokenIsInvalidException
+     * @throws Bitrix24TokenIsExpiredException
+     * @throws Bitrix24WrongClientException
+     * @throws Bitrix24MethodNotFoundException
+     * @throws Bitrix24PaymentRequiredException
+     *
+     */
     public function getFirstAccessToken($code)
     {
         $applicationId = $this->getApplicationId();
@@ -837,30 +813,23 @@ public function getFirstAccessToken($code)
         $applicationScope = $this->getApplicationScope();
         $redirectUri = $this->getRedirectUri();
 
-		if(null === $applicationId)
-        {
+        if (null === $applicationId) {
             throw new Bitrix24Exception('application id not found, you must call setApplicationId method before');
-        }
-        elseif(null === $applicationSecret)
-        {
+        } elseif (null === $applicationSecret) {
             throw new Bitrix24Exception('application id not found, you must call setApplicationSecret method before');
-        }
-        elseif(0 === count($applicationScope))
-        {
+        } elseif (0 === count($applicationScope)) {
             throw new Bitrix24Exception('application scope not found, you must call setApplicationScope method before');
-        }
-        elseif(null === $redirectUri)
-        {
+        } elseif (null === $redirectUri) {
             throw new Bitrix24Exception('application redirect URI not found, you must call setRedirectUri method before');
         }
 
 //        $url = 'https://'.self::OAUTH_SERVER.'/oauth/token/'.
-        $url = 'https://'.$this->getDomain().'/oauth/token/'.
-            '?client_id='.urlencode($applicationId).
-            '&grant_type=authorization_code'.
-            '&client_secret='.$applicationSecret.
-            '&redirect_uri='.urlencode($redirectUri).
-            '&code='.urlencode($code);
+        $url = 'https://' . $this->getDomain() . '/oauth/token/' .
+            '?client_id=' . urlencode($applicationId) .
+            '&grant_type=authorization_code' .
+            '&client_secret=' . $applicationSecret .
+            '&redirect_uri=' . urlencode($redirectUri) .
+            '&code=' . urlencode($code);
 
         $requestResult = $this->executeRequest($url);
         // handling bitrix24 api-level errors
@@ -868,187 +837,167 @@ public function getFirstAccessToken($code)
         return $requestResult;
     }
 
-	/**
-	 * Check is access token expire, call list of all available api-methods from B24 portal with current access token
-	 * if we have an error code expired_token then return true else return false
-	 *
-	 * @throws Bitrix24Exception
-	 * @throws Bitrix24ApiException
-	 * @throws Bitrix24TokenIsInvalid
-	 * @throws Bitrix24TokenIsExpired
-	 * @throws Bitrix24WrongClientException
-	 * @throws Bitrix24MethodNotFoundException
-	 * @throws Bitrix24PortalDeleted
-	 * @throws Bitrix24IoException
-	 * @throws Bitrix24EmptyResponseException
-	 *
-	 * @return boolean
-	 */
-	public function isAccessTokenExpire()
-	{
-		$isTokenExpire = false;
-		$accessToken = $this->getAccessToken();
-		$domain = $this->getDomain();
-
-		if(null === $domain)
-		{
-			throw new Bitrix24Exception('domain not found, you must call setDomain method before');
-		}
-		elseif(null === $accessToken)
-		{
-			throw new Bitrix24Exception('application id not found, you must call setAccessToken method before');
-		}
+    /**
+     * Check is access token expire, call list of all available api-methods from B24 portal with current access token
+     * if we have an error code expired_token then return true else return false
+     *
+     * @throws Bitrix24Exception
+     * @throws Bitrix24ApiException
+     * @throws Bitrix24PortalDeletedException
+     * @throws Bitrix24IoException
+     * @throws Bitrix24EmptyResponseException
+     * @throws Bitrix24TokenIsInvalidException
+     * @throws Bitrix24TokenIsExpiredException
+     * @throws Bitrix24WrongClientException
+     * @throws Bitrix24MethodNotFoundException
+     * @throws Bitrix24PaymentRequiredException
+     *
+     * @return boolean
+     */
+    public function isAccessTokenExpire()
+    {
+        $isTokenExpire = false;
+        $accessToken = $this->getAccessToken();
+        $domain = $this->getDomain();
+
+        if (null === $domain) {
+            throw new Bitrix24Exception('domain not found, you must call setDomain method before');
+        } elseif (null === $accessToken) {
+            throw new Bitrix24Exception('application id not found, you must call setAccessToken method before');
+        }
 //		$url = 'https://'.self::OAUTH_SERVER.'/rest/app.info?auth='.$accessToken;
-		$url = 'https://'.$domain.'/rest/app.info?auth='.$accessToken;
-		$requestResult = $this->executeRequest($url);
-		if(in_array($requestResult['error'], array('expired_token', 'invalid_token', 'WRONG_TOKEN'), false))
-		{
-			$isTokenExpire = true;
-		}
-		else
-		{
-			// handle other errors
-			$this->handleBitrix24APILevelErrors($requestResult, 'app.info');
-		}
-		return $isTokenExpire;
-	}// end of isTokenExpire
-
-	/**
-	 * Get list of all methods available for current application
-	 *
-	 * @param array | null $applicationScope
-	 * @param bool $isFull
-	 *
-	 * @return array
-	 *
-	 * @throws Bitrix24Exception
-	 * @throws Bitrix24Exception
-	 * @throws Bitrix24PortalDeleted
-	 * @throws Bitrix24IoException
-	 * @throws Bitrix24EmptyResponseException
-	 */
-	public function getAvailableMethods(array $applicationScope = array(), $isFull = false)
-	{
-		$accessToken = $this->getAccessToken();
-		$domain = $this->getDomain();
-
-		if(null === $domain)
-		{
-			throw new Bitrix24Exception('domain not found, you must call setDomain method before');
-		}
-		elseif(null === $accessToken)
-		{
-			throw new Bitrix24Exception('application id not found, you must call setAccessToken method before');
-		}
-
-		$showAll = '';
-		if(TRUE === $isFull)
-		{
-			$showAll = '&full=true';
-		}
-		$scope='';
-		if(null === $applicationScope)
-		{
-			$scope = '&scope';
-		}
-		elseif(count(array_unique($applicationScope)) > 0)
-		{
-			$scope = '&scope='.implode(',', array_map('urlencode', array_unique($applicationScope)));
-		}
-		$url = 'https://'.$domain.'/rest/methods.json?auth='.$accessToken.$showAll.$scope;
-		return $this->executeRequest($url);
-	}
-
-	/**
-	 * get list of scope for current application from bitrix24 api
-	 *
-	 * @param bool $isFull
-	 *
-	 * @throws Bitrix24Exception
-	 * @throws Bitrix24Exception
-	 * @throws Bitrix24PortalDeleted
-	 * @throws Bitrix24IoException
-	 * @throws Bitrix24EmptyResponseException
-	 *
-	 * @return array
-	 */
-	public function getScope($isFull=false)
-	{
-		$accessToken = $this->getAccessToken();
-		$domain = $this->getDomain();
-
-		if(null === $domain)
-		{
-			throw new Bitrix24Exception('domain not found, you must call setDomain method before');
-		}
-		elseif(null === $accessToken)
-		{
-			throw new Bitrix24Exception('application id not found, you must call setAccessToken method before');
-		}
-		$showAll = '';
-		if(TRUE === $isFull)
-		{
-			$showAll = '&full=true';
-		}
-		$url = 'https://'.$domain.'/rest/scope.json?auth='.$accessToken.$showAll;
-		return $this->executeRequest($url);
-	}
-
-	/**
-	 * set CURL request count retries
-	 * @param $retriesCnt
-	 *
-	 * @return boolean
-	 *
-	 * @throws  Bitrix24Exception
-	 */
-	public function setRetriesToConnectCount($retriesCnt = 1)
-	{
-		$this->log->debug(sprintf('set retries to connect count %s', $retriesCnt));
-		if(!is_int($retriesCnt))
-		{
-			throw new Bitrix24Exception('retries to connect count must be an integer');
-		}
-		$this->retriesToConnectCount = (int) $retriesCnt;
-		return true;
-	}
-
-	/**
-	 * set retries to connect timeout in microseconds
-	 * @param int $microseconds
-
-	 * @return bool
-
-	 * @throws Bitrix24Exception
-	 */
-	public function setRetriesToConnectTimeout($microseconds = 1000000)
-	{
-		$this->log->debug(sprintf('set retries to connect count %s', $microseconds));
-		if(!is_numeric($microseconds))
-		{
-			throw new Bitrix24Exception('retries to connect count must be an integer');
-		}
-		$this->retriesToConnectTimeout = $microseconds;
-		return true;
-	}
-
-	/**
-	 * get CURL request count retries
-	 *
-	 * @return int
-	 */
-	public function getRetriesToConnectCount()
-	{
-		return $this->retriesToConnectCount;
-	}
-
-	/**
-	 * get retries to connect timeout in microseconds
-	 *
-	 * @return mixed
-	 */
-	public function getRetriesToConnectTimeout()
-	{
-		return $this->retriesToConnectTimeout;
-	}
+        $url = 'https://' . $domain . '/rest/app.info?auth=' . $accessToken;
+        $requestResult = $this->executeRequest($url);
+        if (in_array($requestResult['error'], array('expired_token', 'invalid_token', 'WRONG_TOKEN'), false)) {
+            $isTokenExpire = true;
+        } else {
+            // handle other errors
+            $this->handleBitrix24APILevelErrors($requestResult, 'app.info');
+        }
+        return $isTokenExpire;
+    }// end of isTokenExpire
+
+    /**
+     * Get list of all methods available for current application
+     *
+     * @param array | null $applicationScope
+     * @param bool $isFull
+     *
+     * @return array
+     *
+     * @throws Bitrix24Exception
+     * @throws Bitrix24Exception
+     * @throws Bitrix24PortalDeletedException
+     * @throws Bitrix24IoException
+     * @throws Bitrix24EmptyResponseException
+     */
+    public function getAvailableMethods(array $applicationScope = array(), $isFull = false)
+    {
+        $accessToken = $this->getAccessToken();
+        $domain = $this->getDomain();
+
+        if (null === $domain) {
+            throw new Bitrix24Exception('domain not found, you must call setDomain method before');
+        } elseif (null === $accessToken) {
+            throw new Bitrix24Exception('application id not found, you must call setAccessToken method before');
+        }
+
+        $showAll = '';
+        if (true === $isFull) {
+            $showAll = '&full=true';
+        }
+        $scope = '';
+        if (null === $applicationScope) {
+            $scope = '&scope';
+        } elseif (count(array_unique($applicationScope)) > 0) {
+            $scope = '&scope=' . implode(',', array_map('urlencode', array_unique($applicationScope)));
+        }
+        $url = 'https://' . $domain . '/rest/methods.json?auth=' . $accessToken . $showAll . $scope;
+        return $this->executeRequest($url);
+    }
+
+    /**
+     * get list of scope for current application from bitrix24 api
+     *
+     * @param bool $isFull
+     *
+     * @throws Bitrix24Exception
+     * @throws Bitrix24Exception
+     * @throws Bitrix24PortalDeletedException
+     * @throws Bitrix24IoException
+     * @throws Bitrix24EmptyResponseException
+     *
+     * @return array
+     */
+    public function getScope($isFull = false)
+    {
+        $accessToken = $this->getAccessToken();
+        $domain = $this->getDomain();
+
+        if (null === $domain) {
+            throw new Bitrix24Exception('domain not found, you must call setDomain method before');
+        } elseif (null === $accessToken) {
+            throw new Bitrix24Exception('application id not found, you must call setAccessToken method before');
+        }
+        $showAll = '';
+        if (true === $isFull) {
+            $showAll = '&full=true';
+        }
+        $url = 'https://' . $domain . '/rest/scope.json?auth=' . $accessToken . $showAll;
+        return $this->executeRequest($url);
+    }
+
+    /**
+     * set CURL request count retries
+     * @param $retriesCnt
+     *
+     * @return boolean
+     *
+     * @throws  Bitrix24Exception
+     */
+    public function setRetriesToConnectCount($retriesCnt = 1)
+    {
+        $this->log->debug(sprintf('set retries to connect count %s', $retriesCnt));
+        if (!is_int($retriesCnt)) {
+            throw new Bitrix24Exception('retries to connect count must be an integer');
+        }
+        $this->retriesToConnectCount = (int)$retriesCnt;
+        return true;
+    }
+
+    /**
+     * set retries to connect timeout in microseconds
+     * @param int $microseconds
+     * @return bool
+     * @throws Bitrix24Exception
+     */
+    public function setRetriesToConnectTimeout($microseconds = 1000000)
+    {
+        $this->log->debug(sprintf('set retries to connect count %s', $microseconds));
+        if (!is_numeric($microseconds)) {
+            throw new Bitrix24Exception('retries to connect count must be an integer');
+        }
+        $this->retriesToConnectTimeout = $microseconds;
+        return true;
+    }
+
+    /**
+     * get CURL request count retries
+     *
+     * @return int
+     */
+    public function getRetriesToConnectCount()
+    {
+        return $this->retriesToConnectCount;
+    }
+
+    /**
+     * get retries to connect timeout in microseconds
+     *
+     * @return mixed
+     */
+    public function getRetriesToConnectTimeout()
+    {
+        return $this->retriesToConnectTimeout;
+    }
 }
\ No newline at end of file
diff --git a/src/bitrix24exception.php b/src/bitrix24exception.php
index f3cef761..81292f1f 100644
--- a/src/bitrix24exception.php
+++ b/src/bitrix24exception.php
@@ -15,13 +15,73 @@
  * 			\Bitrix24SecurityException — Security errors for protected methods
  */
 namespace Bitrix24;
+
+/**
+ * Class Bitrix24Exception
+ * @package Bitrix24
+ * @deprecated use \Bitrix24\Exceptions\Bitrix24Exception
+ */
 class Bitrix24Exception extends \Exception {}
+
+/**
+ * Class Bitrix24IoException
+ * @package Bitrix24
+ * @deprecated use \Bitrix24\Exceptions\Bitrix24IoException
+ */
 class Bitrix24IoException extends Bitrix24Exception {}
+
+/**
+ * Class Bitrix24EmptyResponseException
+ * @package Bitrix24
+ * @deprecated use \Bitrix24\Exceptions\Bitrix24EmptyResponseException
+ */
 class Bitrix24EmptyResponseException extends Bitrix24IoException {}
+
+/**
+ * Class Bitrix24ApiException
+ * @package Bitrix24
+ * @deprecated use \Bitrix24\Exceptions\Bitrix24ApiException
+ */
 class Bitrix24ApiException extends Bitrix24Exception {}
+
+/**
+ * Class Bitrix24WrongClientException
+ * @package Bitrix24
+ * @deprecated use \Bitrix24\Exceptions\Bitrix24WrongClientException
+ */
 class Bitrix24WrongClientException extends Bitrix24ApiException {}
+
+/**
+ * Class Bitrix24MethodNotFoundException
+ * @package Bitrix24
+ * @deprecated use \Bitrix24\Exceptions\Bitrix24MethodNotFoundException
+ */
 class Bitrix24MethodNotFoundException extends Bitrix24ApiException {}
+
+/**
+ * Class Bitrix24TokenIsInvalid
+ * @package Bitrix24
+ * @deprecated use \Bitrix24\Exceptions\Bitrix24TokenIsInvalidException
+ */
 class Bitrix24TokenIsInvalid extends Bitrix24ApiException {}
+
+/**
+ * Class Bitrix24TokenIsExpired
+ * @package Bitrix24
+ * @deprecated use \Bitrix24\Exceptions\Bitrix24TokenIsExpiredException
+ */
 class Bitrix24TokenIsExpired extends Bitrix24ApiException {}
+
+/**
+ * Class Bitrix24PortalDeleted
+ * @package Bitrix24
+ * @deprecated use \Bitrix24\Exceptions\Bitrix24PortalDeletedException
+ */
 class Bitrix24PortalDeleted extends Bitrix24ApiException {}
+
+/**
+ * Class Bitrix24SecurityException
+ * @package Bitrix24
+ * @deprecated use \Bitrix24\Exceptions\Bitrix24SecurityException
+ */
 class Bitrix24SecurityException extends Bitrix24Exception {}
\ No newline at end of file
diff --git a/src/contracts/ibitrix24.php b/src/contracts/ibitrix24.php
index 31f63566..f980caa7 100644
--- a/src/contracts/ibitrix24.php
+++ b/src/contracts/ibitrix24.php
@@ -8,16 +8,19 @@
 namespace Bitrix24\Contracts;
 
 use Bitrix24\Bitrix24;
-use Bitrix24\Bitrix24Exception;
-use Bitrix24\Bitrix24IoException;
-use Bitrix24\Bitrix24ApiException;
-use Bitrix24\Bitrix24WrongClientException;
-use Bitrix24\Bitrix24MethodNotFoundException;
-use Bitrix24\Bitrix24TokenIsInvalid;
-use Bitrix24\Bitrix24TokenIsExpired;
-use Bitrix24\Bitrix24SecurityException;
-
-use Bitrix24\Stub\Logger;
+use Bitrix24\Exceptions\Bitrix24Exception;
+use Bitrix24\Exceptions\Bitrix24IoException;
+use Bitrix24\Exceptions\Bitrix24PaymentRequiredException;
+use Bitrix24\Exceptions\Bitrix24EmptyResponseException;
+use Bitrix24\Exceptions\Bitrix24ApiException;
+use Bitrix24\Exceptions\Bitrix24TokenIsInvalidException;
+use Bitrix24\Exceptions\Bitrix24WrongClientException;
+use Bitrix24\Exceptions\Bitrix24MethodNotFoundException;
+use Bitrix24\Exceptions\Bitrix24TokenIsExpiredException;
+use Bitrix24\Exceptions\Bitrix24PortalDeletedException;
+use Bitrix24\Exceptions\Bitrix24SecurityException;
+
+
 use Psr\Log\LoggerInterface;
 
 /**
@@ -176,19 +179,26 @@ public function getRequestInfo();
 	 */
 	public function getMethodParameters();
 
-	/**
-	 * Execute Bitrix24 REST API method
-	 * @param string $methodName
-	 * @param array $additionalParameters
-	 * @throws Bitrix24Exception
-	 * @throws Bitrix24ApiException
-	 * @throws Bitrix24TokenIsInvalid
-	 * @throws Bitrix24TokenIsExpired
-	 * @throws Bitrix24WrongClientException
-	 * @throws Bitrix24MethodNotFoundException
-	 * @throws Bitrix24SecurityException
-	 * @return array
-	 */
+    /**
+     * Execute Bitrix24 REST API method
+     *
+     * @param string $methodName
+     * @param array $additionalParameters
+     *
+     * @throws Bitrix24Exception
+     * @throws Bitrix24ApiException
+     * @throws Bitrix24TokenIsInvalidException
+     * @throws Bitrix24TokenIsExpiredException
+     * @throws Bitrix24WrongClientException
+     * @throws Bitrix24MethodNotFoundException
+     * @throws Bitrix24PaymentRequiredException
+     * @throws Bitrix24SecurityException
+     * @throws Bitrix24PortalDeletedException
+     * @throws Bitrix24IoException
+     * @throws Bitrix24EmptyResponseException
+     *
+     * @return array
+     */
 	public function call($methodName, array $additionalParameters = array());
 
 	/**
@@ -199,43 +209,63 @@ public function call($methodName, array $additionalParameters = array());
 	 */
 	public function getRawResponse();
 
-	/**
-	 * Get new access token
-	 * @return array
-	 * @throws Bitrix24Exception
-	 * @throws Bitrix24ApiException
-	 * @throws Bitrix24TokenIsInvalid
-	 * @throws Bitrix24TokenIsExpired
-	 * @throws Bitrix24WrongClientException
-	 * @throws Bitrix24MethodNotFoundException
-	 */
+    /**
+     * Get new access token
+     *
+     * @return array
+     *
+     * @throws Bitrix24Exception
+     * @throws Bitrix24ApiException
+     * @throws Bitrix24PortalDeletedException
+     * @throws Bitrix24IoException
+     * @throws Bitrix24EmptyResponseException
+     * @throws Bitrix24TokenIsInvalidException
+     * @throws Bitrix24TokenIsExpiredException
+     * @throws Bitrix24WrongClientException
+     * @throws Bitrix24MethodNotFoundException
+     * @throws Bitrix24PaymentRequiredException
+     *
+     */
 	public function getNewAccessToken();
 
-	/**
-	 * Authorize and get first access token
-	 * @param $code
-	 * @return array
-	 * @throws Bitrix24ApiException
-	 * @throws Bitrix24Exception
-	 * @throws Bitrix24IoException
-	 * @throws Bitrix24MethodNotFoundException
-	 * @throws Bitrix24TokenIsExpired
-	 * @throws Bitrix24TokenIsInvalid
-	 * @throws Bitrix24WrongClientException
-	 */
+    /**
+     * Authorize and get first access token
+     *
+     * @param $code
+     *
+     * @return array
+     *
+     * @throws Bitrix24Exception
+     * @throws Bitrix24ApiException
+     * @throws Bitrix24PortalDeletedException
+     * @throws Bitrix24IoException
+     * @throws Bitrix24EmptyResponseException
+     * @throws Bitrix24TokenIsInvalidException
+     * @throws Bitrix24TokenIsExpiredException
+     * @throws Bitrix24WrongClientException
+     * @throws Bitrix24MethodNotFoundException
+     * @throws Bitrix24PaymentRequiredException
+     *
+     */
 	public function getFirstAccessToken($code);
 
-	/**
-	 * Check is access token expire, call list of all available api-methods from B24 portal with current access token
-	 * if we have an error code expired_token then return true else return false
-	 * @throws Bitrix24Exception
-	 * @throws Bitrix24ApiException
-	 * @throws Bitrix24TokenIsInvalid
-	 * @throws Bitrix24TokenIsExpired
-	 * @throws Bitrix24WrongClientException
-	 * @throws Bitrix24MethodNotFoundException
-	 * @return boolean
-	 */
+    /**
+     * Check is access token expire, call list of all available api-methods from B24 portal with current access token
+     * if we have an error code expired_token then return true else return false
+     *
+     * @throws Bitrix24Exception
+     * @throws Bitrix24ApiException
+     * @throws Bitrix24PortalDeletedException
+     * @throws Bitrix24IoException
+     * @throws Bitrix24EmptyResponseException
+     * @throws Bitrix24TokenIsInvalidException
+     * @throws Bitrix24TokenIsExpiredException
+     * @throws Bitrix24WrongClientException
+     * @throws Bitrix24MethodNotFoundException
+     * @throws Bitrix24PaymentRequiredException
+     *
+     * @return boolean
+     */
 	public function isAccessTokenExpire();
 
 	/**
diff --git a/src/exceptions/bitrix24apiexception.php b/src/exceptions/bitrix24apiexception.php
new file mode 100644
index 00000000..04c2b405
--- /dev/null
+++ b/src/exceptions/bitrix24apiexception.php
@@ -0,0 +1,18 @@
+<?php
+/*
+ * This file is part of the bitrix24-php-sdk package.
+ *
+ * © Mesilov Maxim <mesilov.maxim@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace Bitrix24\Exceptions;
+
+/**
+ * Class Bitrix24PaymentRequiredException
+ * @package Bitrix24
+ */
+class Bitrix24ApiException extends Bitrix24Exception
+{
+}
\ No newline at end of file
diff --git a/src/exceptions/bitrix24emptyresponseexception.php b/src/exceptions/bitrix24emptyresponseexception.php
new file mode 100644
index 00000000..1342d227
--- /dev/null
+++ b/src/exceptions/bitrix24emptyresponseexception.php
@@ -0,0 +1,18 @@
+<?php
+/*
+ * This file is part of the bitrix24-php-sdk package.
+ *
+ * © Mesilov Maxim <mesilov.maxim@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace Bitrix24\Exceptions;
+
+/**
+ * Class Bitrix24IOException
+ * @package Bitrix24
+ */
+class Bitrix24EmptyResponseException extends Bitrix24IoException
+{
+}
\ No newline at end of file
diff --git a/src/exceptions/bitrix24exception.php b/src/exceptions/bitrix24exception.php
new file mode 100644
index 00000000..9b867bc3
--- /dev/null
+++ b/src/exceptions/bitrix24exception.php
@@ -0,0 +1,32 @@
+<?php
+/*
+ * This file is part of the bitrix24-php-sdk package.
+ *
+ * © Mesilov Maxim <mesilov.maxim@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace Bitrix24\Exceptions;
+
+/**
+ * Class Bitrix24Exception
+ *
+ * \Exception
+ * 		\Bitrix24Exception — base class
+ * 			\Bitrix24IoException — I/O network errors
+ * 			    \Bitrix24EmptyResponseException — empty response from Bitrix24 portal
+ * 			\Bitrix24ApiException — API level errors
+ * 				\Bitrix24WrongClientException — Wrong client or application will be deleted from portal
+ * 				\Bitrix24MethodNotFoundException — API-method not found
+ * 				\Bitrix24TokenIsInvalidException — The access token provided is invalid
+ * 				\Bitrix24TokenIsExpiredException — The access token provided has expired
+ * 				\Bitrix24PortalDeletedException — Bitrix24 portal deleted
+ * 				\Bitrix24PaymentRequiredException — Bitrix24 application payment required
+ * 			\Bitrix24SecurityException — Security errors for protected methods
+ *
+ * @package Bitrix24\Exceptions
+ */
+class Bitrix24Exception extends \Exception
+{
+}
\ No newline at end of file
diff --git a/src/exceptions/bitrix24ioexception.php b/src/exceptions/bitrix24ioexception.php
new file mode 100644
index 00000000..5817969b
--- /dev/null
+++ b/src/exceptions/bitrix24ioexception.php
@@ -0,0 +1,18 @@
+<?php
+/*
+ * This file is part of the bitrix24-php-sdk package.
+ *
+ * © Mesilov Maxim <mesilov.maxim@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace Bitrix24\Exceptions;
+
+/**
+ * Class Bitrix24IoException
+ * @package Bitrix24
+ */
+class Bitrix24IoException extends Bitrix24Exception
+{
+}
\ No newline at end of file
diff --git a/src/exceptions/bitrix24methodnotfoundexception.php b/src/exceptions/bitrix24methodnotfoundexception.php
new file mode 100644
index 00000000..78116a25
--- /dev/null
+++ b/src/exceptions/bitrix24methodnotfoundexception.php
@@ -0,0 +1,18 @@
+<?php
+/*
+ * This file is part of the bitrix24-php-sdk package.
+ *
+ * © Mesilov Maxim <mesilov.maxim@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace Bitrix24\Exceptions;
+
+/**
+ * Class Bitrix24WrongClientException
+ * @package Bitrix24
+ */
+class Bitrix24MethodNotFoundException extends Bitrix24ApiException
+{
+}
\ No newline at end of file
diff --git a/src/exceptions/bitrix24paymentrequiredexception.php b/src/exceptions/bitrix24paymentrequiredexception.php
new file mode 100644
index 00000000..dce1d1a0
--- /dev/null
+++ b/src/exceptions/bitrix24paymentrequiredexception.php
@@ -0,0 +1,18 @@
+<?php
+/*
+ * This file is part of the bitrix24-php-sdk package.
+ *
+ * © Mesilov Maxim <mesilov.maxim@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace Bitrix24\Exceptions;
+
+/**
+ * Class Bitrix24PaymentRequiredException
+ * @package Bitrix24
+ */
+class Bitrix24PaymentRequiredException extends Bitrix24ApiException
+{
+}
\ No newline at end of file
diff --git a/src/exceptions/bitrix24portaldeletedexception.php b/src/exceptions/bitrix24portaldeletedexception.php
new file mode 100644
index 00000000..9001a5cc
--- /dev/null
+++ b/src/exceptions/bitrix24portaldeletedexception.php
@@ -0,0 +1,18 @@
+<?php
+/*
+ * This file is part of the bitrix24-php-sdk package.
+ *
+ * © Mesilov Maxim <mesilov.maxim@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace Bitrix24\Exceptions;
+
+/**
+ * Class Bitrix24PortalDeletedException
+ * @package Bitrix24
+ */
+class Bitrix24PortalDeletedException extends Bitrix24ApiException
+{
+}
\ No newline at end of file
diff --git a/src/exceptions/bitrix24securityexception.php b/src/exceptions/bitrix24securityexception.php
new file mode 100644
index 00000000..aeda62ce
--- /dev/null
+++ b/src/exceptions/bitrix24securityexception.php
@@ -0,0 +1,18 @@
+<?php
+/*
+ * This file is part of the bitrix24-php-sdk package.
+ *
+ * © Mesilov Maxim <mesilov.maxim@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace Bitrix24\Exceptions;
+
+/**
+ * Class Bitrix24SecurityException
+ * @package Bitrix24
+ */
+class Bitrix24SecurityException extends Bitrix24Exception
+{
+}
\ No newline at end of file
diff --git a/src/exceptions/bitrix24tokenisexpiredexception.php b/src/exceptions/bitrix24tokenisexpiredexception.php
new file mode 100644
index 00000000..9c6fa130
--- /dev/null
+++ b/src/exceptions/bitrix24tokenisexpiredexception.php
@@ -0,0 +1,18 @@
+<?php
+/*
+ * This file is part of the bitrix24-php-sdk package.
+ *
+ * © Mesilov Maxim <mesilov.maxim@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace Bitrix24\Exceptions;
+
+/**
+ * Class Bitrix24TokenIsExpiredException
+ * @package Bitrix24
+ */
+class Bitrix24TokenIsExpiredException extends Bitrix24ApiException
+{
+}
\ No newline at end of file
diff --git a/src/exceptions/bitrix24tokenisinvalidexception.php b/src/exceptions/bitrix24tokenisinvalidexception.php
new file mode 100644
index 00000000..28c18571
--- /dev/null
+++ b/src/exceptions/bitrix24tokenisinvalidexception.php
@@ -0,0 +1,18 @@
+<?php
+/*
+ * This file is part of the bitrix24-php-sdk package.
+ *
+ * © Mesilov Maxim <mesilov.maxim@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace Bitrix24\Exceptions;
+
+/**
+ * Class Bitrix24TokenIsInvalidException
+ * @package Bitrix24
+ */
+class Bitrix24TokenIsInvalidException extends Bitrix24ApiException
+{
+}
\ No newline at end of file
diff --git a/src/exceptions/bitrix24wrongclientexception.php b/src/exceptions/bitrix24wrongclientexception.php
new file mode 100644
index 00000000..92c280a9
--- /dev/null
+++ b/src/exceptions/bitrix24wrongclientexception.php
@@ -0,0 +1,18 @@
+<?php
+/*
+ * This file is part of the bitrix24-php-sdk package.
+ *
+ * © Mesilov Maxim <mesilov.maxim@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace Bitrix24\Exceptions;
+
+/**
+ * Class Bitrix24WrongClientException
+ * @package Bitrix24
+ */
+class Bitrix24WrongClientException extends Bitrix24ApiException
+{
+}
\ No newline at end of file
diff --git a/src/stub/bitrix24.php b/src/stub/bitrix24.php
index 2b99b576..ceeadaf8 100644
--- a/src/stub/bitrix24.php
+++ b/src/stub/bitrix24.php
@@ -4,14 +4,17 @@
 use Bitrix24\Contracts\iBitrix24;
 use Psr\Log\LoggerInterface;
 
-use Bitrix24\Bitrix24Exception;
-use Bitrix24\Bitrix24IoException;
-use Bitrix24\Bitrix24ApiException;
-use Bitrix24\Bitrix24WrongClientException;
-use Bitrix24\Bitrix24MethodNotFoundException;
-use Bitrix24\Bitrix24TokenIsInvalid;
-use Bitrix24\Bitrix24TokenIsExpired;
-use Bitrix24\Bitrix24SecurityException;
+use Bitrix24\Exceptions\Bitrix24Exception;
+use Bitrix24\Exceptions\Bitrix24IoException;
+use Bitrix24\Exceptions\Bitrix24PaymentRequiredException;
+use Bitrix24\Exceptions\Bitrix24EmptyResponseException;
+use Bitrix24\Exceptions\Bitrix24ApiException;
+use Bitrix24\Exceptions\Bitrix24TokenIsInvalidException;
+use Bitrix24\Exceptions\Bitrix24WrongClientException;
+use Bitrix24\Exceptions\Bitrix24MethodNotFoundException;
+use Bitrix24\Exceptions\Bitrix24TokenIsExpiredException;
+use Bitrix24\Exceptions\Bitrix24PortalDeletedException;
+use Bitrix24\Exceptions\Bitrix24SecurityException;
 
 /**
  * Class Bitrix24
@@ -266,22 +269,26 @@ public function getMethodParameters()
 	{
 	}
 
-	/**
-	 * Execute Bitrix24 REST API method
-	 *
-	 * @param string $methodName
-	 * @param array $additionalParameters
-	 *
-	 * @throws Bitrix24Exception
-	 * @throws Bitrix24ApiException
-	 * @throws Bitrix24TokenIsInvalid
-	 * @throws Bitrix24TokenIsExpired
-	 * @throws Bitrix24WrongClientException
-	 * @throws Bitrix24MethodNotFoundException
-	 * @throws Bitrix24SecurityException
-	 *
-	 * @return array
-	 */
+    /**
+     * Execute Bitrix24 REST API method
+     *
+     * @param string $methodName
+     * @param array $additionalParameters
+     *
+     * @throws Bitrix24Exception
+     * @throws Bitrix24ApiException
+     * @throws Bitrix24TokenIsInvalidException
+     * @throws Bitrix24TokenIsExpiredException
+     * @throws Bitrix24WrongClientException
+     * @throws Bitrix24MethodNotFoundException
+     * @throws Bitrix24PaymentRequiredException
+     * @throws Bitrix24SecurityException
+     * @throws Bitrix24PortalDeletedException
+     * @throws Bitrix24IoException
+     * @throws Bitrix24EmptyResponseException
+     *
+     * @return array
+     */
 	public function call($methodName, array $additionalParameters = array())
 	{
 	}
@@ -298,54 +305,67 @@ public function getRawResponse()
 	{
 	}
 
-	/**
-	 * Get new access token
-	 *
-	 * @return array
-	 *
-	 * @throws Bitrix24Exception
-	 * @throws Bitrix24ApiException
-	 * @throws Bitrix24TokenIsInvalid
-	 * @throws Bitrix24TokenIsExpired
-	 * @throws Bitrix24WrongClientException
-	 * @throws Bitrix24MethodNotFoundException
-	 */
+    /**
+     * Get new access token
+     *
+     * @return array
+     *
+     * @throws Bitrix24Exception
+     * @throws Bitrix24ApiException
+     * @throws Bitrix24PortalDeletedException
+     * @throws Bitrix24IoException
+     * @throws Bitrix24EmptyResponseException
+     * @throws Bitrix24TokenIsInvalidException
+     * @throws Bitrix24TokenIsExpiredException
+     * @throws Bitrix24WrongClientException
+     * @throws Bitrix24MethodNotFoundException
+     * @throws Bitrix24PaymentRequiredException
+     *
+     */
 	public function getNewAccessToken()
 	{
 	}
 
-	/**
-	 * Authorize and get first access token
-	 *
-	 * @param $code
-	 *
-	 * @return array
-	 *
-	 * @throws Bitrix24ApiException
-	 * @throws Bitrix24Exception
-	 * @throws Bitrix24IoException
-	 * @throws Bitrix24MethodNotFoundException
-	 * @throws Bitrix24TokenIsExpired
-	 * @throws Bitrix24TokenIsInvalid
-	 * @throws Bitrix24WrongClientException
-	 */
+    /**
+     * Authorize and get first access token
+     *
+     * @param $code
+     *
+     * @return array
+     *
+     * @throws Bitrix24Exception
+     * @throws Bitrix24ApiException
+     * @throws Bitrix24PortalDeletedException
+     * @throws Bitrix24IoException
+     * @throws Bitrix24EmptyResponseException
+     * @throws Bitrix24TokenIsInvalidException
+     * @throws Bitrix24TokenIsExpiredException
+     * @throws Bitrix24WrongClientException
+     * @throws Bitrix24MethodNotFoundException
+     * @throws Bitrix24PaymentRequiredException
+     *
+     */
 	public function getFirstAccessToken($code)
 	{
 	}
 
-	/**
-	 * Check is access token expire, call list of all available api-methods from B24 portal with current access token
-	 * if we have an error code expired_token then return true else return false
-	 *
-	 * @throws Bitrix24Exception
-	 * @throws Bitrix24ApiException
-	 * @throws Bitrix24TokenIsInvalid
-	 * @throws Bitrix24TokenIsExpired
-	 * @throws Bitrix24WrongClientException
-	 * @throws Bitrix24MethodNotFoundException
-	 *
-	 * @return boolean
-	 */
+    /**
+     * Check is access token expire, call list of all available api-methods from B24 portal with current access token
+     * if we have an error code expired_token then return true else return false
+     *
+     * @throws Bitrix24Exception
+     * @throws Bitrix24ApiException
+     * @throws Bitrix24PortalDeletedException
+     * @throws Bitrix24IoException
+     * @throws Bitrix24EmptyResponseException
+     * @throws Bitrix24TokenIsInvalidException
+     * @throws Bitrix24TokenIsExpiredException
+     * @throws Bitrix24WrongClientException
+     * @throws Bitrix24MethodNotFoundException
+     * @throws Bitrix24PaymentRequiredException
+     *
+     * @return boolean
+     */
 	public function isAccessTokenExpire()
 	{
 	}
diff --git a/tests/src/Bitrix24Test.php b/tests/src/Bitrix24Test.php
index af9d8d85..5b1198d2 100644
--- a/tests/src/Bitrix24Test.php
+++ b/tests/src/Bitrix24Test.php
@@ -7,7 +7,6 @@
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
  */
-
 namespace Bitrix24;
 
 use \Psr\Log\NullLogger;
@@ -23,7 +22,7 @@ class Bitrix24Test extends \PHPUnit_Framework_TestCase
 	 */
 	public function testConstructorWithFirstArgumentIsNotBoolean()
 	{
-		$this->setExpectedException('\Bitrix24\Bitrix24Exception');
+		$this->setExpectedException('\Bitrix24\Exceptions\Bitrix24Exception');
 		$obBitrix24 = new Bitrix24(array());
 	}
 	/**
@@ -54,7 +53,7 @@ public function testSetMemberIdWithValidArgument()
 	 */
 	public function testSetMemberIdWithNullArgument()
 	{
-		$this->setExpectedException('\Bitrix24\Bitrix24Exception');
+		$this->setExpectedException('\Bitrix24\Exceptions\Bitrix24Exception');
 		$obBitrix24 = new Bitrix24(false, new NullLogger());
 		$result = $obBitrix24->setMemberId(null);
 		$this->assertTrue($result);
@@ -64,7 +63,7 @@ public function testSetMemberIdWithNullArgument()
 	 */
 	public function testSetMemberIdWithEmptyStringArgument()
 	{
-		$this->setExpectedException('\Bitrix24\Bitrix24Exception');
+		$this->setExpectedException('\Bitrix24\Exceptions\Bitrix24Exception');
 		$obBitrix24 = new Bitrix24(false, new NullLogger());
 		$result = $obBitrix24->setMemberId('');
 		$this->assertTrue($result);
@@ -74,7 +73,7 @@ public function testSetMemberIdWithEmptyStringArgument()
 	 */
 	public function testSetRetriesToConnectCountWithNull()
 	{
-		$this->setExpectedException('\Bitrix24\Bitrix24Exception');
+		$this->setExpectedException('\Bitrix24\Exceptions\Bitrix24Exception');
 		$obBitrix24 = new Bitrix24(false, new NullLogger());
 		$result = $obBitrix24->setRetriesToConnectCount(null);
 	}
@@ -101,7 +100,7 @@ public function testSetRetriesToConnectCountWithValidArgs()
 	 */
 	public function testSetRetriesToConnectTimeoutWithNull()
 	{
-		$this->setExpectedException('\Bitrix24\Bitrix24Exception');
+		$this->setExpectedException('\Bitrix24\Exceptions\Bitrix24Exception');
 		$obBitrix24 = new Bitrix24(false, new NullLogger());
 		$result = $obBitrix24->setRetriesToConnectTimeout(null);
 	}