Client::call

public function call($methodName, $additionalParams = null, $licenseCheck = false)
{
	if ($this->clientId && $this->clientSecret)
	{
		$additionalParams = $this->prepareRequest($additionalParams, $licenseCheck);

		$httpClient = $this->getHttpClient();
		$httpResult = $httpClient->post(
			$this->getRequestUrl($methodName),
			$additionalParams
		);

		$response = $this->prepareResponse($httpResult);

		if ($response)
		{
			if (!$licenseCheck && is_array($response) && isset($response['error']) && $response['error'] === 'verification_needed')
			{
				return $this->call($methodName, $additionalParams, true);
			}
		}
		else
		{
			addMessage2Log(
				'Strange answer from Bitrix Service! '
				. static::SERVICE_URL
				. static::SERVICE_PATH
				. $methodName . ": "
				. $httpClient->getStatus() . ' '
				. implode(" ", $httpClient->getError())
				. $httpResult
			);
		}

		return $response;
	}
	else
	{
		throw new SystemException("No client credentials");
	}
}