added dns support

src/Helper.php

@@ -92,11 +92,11 @@ class Helper
         file_put_contents($fn, implode("\n", $config));
         $csr = openssl_csr_new([
             'countryName' => 'NL',
-            'commonName'  => $primaryDomain,
+            'commonName' => $primaryDomain,
         ], $key, [
-            'config'         => $fn,
+            'config' => $fn,
             'req_extensions' => 'SAN',
-            'digest_alg'     => 'sha512',
+            'digest_alg' => 'sha512',
         ]);
         unlink($fn);
 
@@ -140,37 +140,4 @@ class Helper
 
         return $accountDetails;
     }
-
-    /**
-     * Wait until a set of DNS records return specific TXT record values
-     *
-     * @param array mapping domain to desired TXT record value
-     * @param $txtRecord
-     * @param int $maxSeconds to wait
-     * @return bool true if record found, false otherwise
-     */
-    public static function waitForDNS(array $records, $maxSeconds=60)
-    {
-        $waitUntil = time() + $maxSeconds;
-
-        do {
-            //validate all remaining records..
-            foreach($records as $domain=>$txtRecord) {
-                $record=dns_get_record($domain, DNS_TXT);
-                if (isset($record[0]['txt']) && ($record[0]['txt']===$txtRecord)) {
-                    unset($records[$domain]);
-                }
-            }
-
-            //did we find them all?
-            if (empty($records)) {
-                return true;
-            }
-
-            //otherwise still domains to check...have a short sleep
-            sleep(1);
-        } while(time() < $waitUntil);
-
-        return false;
-    }
 }