WIP properly fails dry challenge

app.js

@@ -163,6 +163,7 @@
         }).catch(function (err) {
           console.error("A bad thing happened:");
           console.error(err);
+          window.alert(err.message || JSON.stringify(err, null, 2));
         });
       });
     });

lib/acme.js

@@ -823,17 +823,15 @@ ACME.create = function create(me) {
   if (!me.dig) {
     me.dig = function (query) {
       // TODO use digd.js
-      return new Promise(function (resolve, reject) {
-        var dns = require('dns');
-        dns.resolveTxt(query.name, function (err, records) {
-          if (err) { reject(err); return; }
-
-          resolve({
-            answer: records.map(function (rr) {
-              return { data: rr };
-            })
-          });
-        });
+      return new me.request({ url: "/api/dns/" + query.name + "?type=" + query.type }).then(function (resp) {
+        if (!resp.body || !Array.isArray(resp.body.answer)) {
+          throw new Error("failed to get DNS response");
+        }
+        return {
+          answer: resp.body.answer.map(function (ans) {
+            return { data: ans.data, ttl: ans.ttl };
+          })
+        };
       });
     };
   }