diff --git a/lib/app.js b/lib/app.js
index 2dedc726..854e0dd8 100644
--- a/lib/app.js
+++ b/lib/app.js
@@ -47,10 +47,9 @@ module.exports = function (options) {
 
   app.use(express.bodyParser());
 
-  if (!options.https) {
-    server = http.createServer(app);
-  }
-  else {
+  var authMiddleware;
+
+  if (options.https) {
     var serverOptions = {
       key: options.https.key,
       cert: options.https.cert,
@@ -61,30 +60,28 @@ module.exports = function (options) {
     };
 
     server = https.createServer(serverOptions, app);
-  }
 
-  var authMiddleware = function (req, res, next) {
-    req.device = {};
-    return next();
-  };
-
-  if (options.https) {
     authMiddleware = function(req, res, next) {
-      var fingerprint = req.connection.getPeerCertificate().fingerprint;
-
-      config.isAuthorized(fingerprint, function (err, device) {
-        if (err) { 
+      config.isAuthorized(routes.getFingerprint(req), function (err, device) {
+        if (err) {
           res.json({err: 'Internal Server Error'});
           return next(err); 
         }
         if (!device) {
-          res.statusCode = 404;
-          res.json({err: 'Not Found'});
-          return next(new Error('Device is unpaired')); 
+          res.json(404, {err: 'Not Found'});
+          return next(new Error('Device is unpaired'));
         }
         next();
       });
     };
+
+  } else {
+    server = http.createServer(app);
+
+    authMiddleware = function (req, res, next) {
+      req.device = {};
+      return next();
+    };
   }
 
   routes.init(app, config, trader, authMiddleware);
diff --git a/lib/routes.js b/lib/routes.js
index 83a3b9f5..7a162d28 100644
--- a/lib/routes.js
+++ b/lib/routes.js
@@ -4,6 +4,11 @@ var _trader;
 var _lamassuConfig;
 var logger = require('./logger');
 
+module.exports = {
+  init: init,
+  getFingerprint: getFingerprint
+};
+
 // Make sure these are higher than polling interval
 // or there will be a lot of errors
 var STALE_TICKER  = 180000;
@@ -18,13 +23,13 @@ Error.prototype.toJSON = function () {
   return ret;
 };
 
-var poll = function(req, res) {
+function poll(req, res) {
   var rateRec = _trader.rate();
   var balanceRec = _trader.balance;
   var fingerprint = getFingerprint(req);
 
   logger.debug('poll request from: %s', fingerprint);
-  
+
   // `rateRec` and `balanceRec` are both objects, so there's no danger
   // of misinterpreting rate or balance === 0 as 'Server initializing'.
   if (!rateRec || !balanceRec) {
@@ -54,13 +59,13 @@ var poll = function(req, res) {
   });
 };
 
-var trade = function (req, res) {
+function trade(req, res) {
   var fingerprint = getFingerprint(req);
   _trader.trade(req.body, fingerprint);
   res.json({err: null});
 };
 
-var send = function(req, res) {
+function send(req, res) {
   var fingerprint = getFingerprint(req);
   _trader.sendBitcoins(fingerprint, req.body, function(err, txHash) {
     res.json({
@@ -71,7 +76,7 @@ var send = function(req, res) {
   });
 };
 
-var pair = function(req, res) {
+function pair(req, res) {
   var token = req.body.token;
   var name = req.body.name;
 
@@ -89,7 +94,7 @@ var pair = function(req, res) {
   );
 };
 
-exports.init = function(app, config, trader, authMiddleware) {
+function init(app, config, trader, authMiddleware) {
   _lamassuConfig = config;
   _trader = trader;
 
@@ -102,6 +107,6 @@ exports.init = function(app, config, trader, authMiddleware) {
 };
 
 function getFingerprint(req) {
-  return req.connection.getPeerCertificate && 
+  return typeof req.connection.getPeerCertificate === 'function' &&
     req.connection.getPeerCertificate().fingerprint;
-}
\ No newline at end of file
+};
diff --git a/lib/trader.js b/lib/trader.js
index ee181f71..48d4c5f5 100644
--- a/lib/trader.js
+++ b/lib/trader.js
@@ -21,7 +21,12 @@ var Trader = module.exports = function (db) {
 };
 
 Trader.prototype._findExchange = function (name) {
-  return require('lamassu-' + name);
+  try {
+    return require('lamassu-' + name);
+
+  } catch(_) {
+    throw new Error(name + ' module is not installed. Try running `npm install --save lamassu-' + name + '` first');
+  }
 };
 
 Trader.prototype._findTicker = function (name) {