code: def search(self, domain, wildcard=True):
          
          base_url = "https://crt.sh/?q={}&output=json"
          if wildcard:
              domain = "%25.{}".format(domain)
          url = base_url.format(domain)
  
          ua = 'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:40.0) Gecko/20100101 Firefox/40.1'
          req = requests.get(url, headers={'User-Agent': ua})
  
          if req.ok:
              try:
                  content = req.content.decode('utf-8')
                  data = json.loads(content.replace('}{', '},{'))
                  return data
              except Exception:
                  self.error("Error retrieving information.")
          return None
docs: Search crt.sh for the given domain.
  
          domain -- Domain to search for
          wildcard -- Whether or not to prepend a wildcard to the domain
                      (default: True)
  
          Return a list of a certificate dict:
  
          {
              "issuer_ca_id": 16418,
              "issuer_name": "C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3",
              "name_value": "hatch.uber.com",
              "min_cert_id": 325717795,
              "min_entry_timestamp": "2018-02-08T16:47:39.089",
              "not_before": "2018-02-08T15:47:39"
          }
  
          XML notation would also include the base64 cert:
          https://crt.sh/atom?q={}