code: public function doEnhancement(Lead $lead)
      {
          $persist = false;
          if (!empty($lead)) {
              $algo  = $lead->getFieldValue('fourleaf_algo');
              $email = $lead->getEmail();
  
              if ($algo || !$email) {
                  return false;
              }
  
              $keys = $this->getKeys();
  
              // @todo - Update to use Guzzle.
              $options = [
                  CURLOPT_RETURNTRANSFER => true,
                  CURLOPT_URL            => $keys['url'].'?ident='.$lead->getEmail(),
                  CURLOPT_HTTPHEADER     => [
                      "X-Fourleaf-Id: $keys[id]",
                  ],
                  CURLOPT_CONNECTTIMEOUT => 2,
                  CURLOPT_TIMEOUT        => 3,
              ];
  
              try {
                  $ch = curl_init();
                  curl_setopt_array($ch, $options);
                  $response = curl_exec($ch);
                  curl_close($ch);
              } catch (\Exception $e) {
                  $this->handleEnchancerException('FourLeaf', $e);
                  $this->logger->error($e->getMessage());
  
                  return false;
              }
  
              $response = json_decode($response, true);
  
              if ('ok' === $response['message']) {
                  $this->applyCost($lead);
                  $data           = $response['data'];
                  $allowedAliases = $this->getEnhancerFieldArray();
                  unset($data['md5']);
                  $data['low_intel'] = (bool) strcasecmp($response['data']['low_intel'], 'false');
                  foreach ($data as $key => $value) {
                      $alias = 'fourleaf_'.str_replace('user_', '', $key);
                      if (isset($allowedAliases[$alias])) {
                          $default = $lead->getFieldValue($alias);
                          $lead->addUpdatedField($alias, $value, $default);
                      }
                  }
                  $persist = true;
              }
          }
  
          return $persist;
      }
docs: @param Lead $lead
  
  @return bool