public function __construct
(
  MagentoFrameworkHTTPAdapterCurl $curl
)
{
  $this->curl = $curl;
}

public function getGeoIpResponse($ip)
{
  $this->curl->setConfig(['header' => false]);
  $this->curl->write('GET', $ip);

  return $this->curl->read();
}

public function __construct
(
  MagentoFrameworkHTTPAdapterCurl $curl
)
{
  $this->curl = $curl;
}

public function getFixerResponse($base) {

  $this->curl->write('GET', $this->fixerUrl . $base);

  $response = $this->curl->read();

  return $response;
}