fix(fingerprint): check for getPeerCertificate fn existence added

lib/routes.js

@@ -18,7 +18,7 @@ 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);
@@ -54,13 +54,13 @@ 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 +71,7 @@ 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 +89,7 @@ var pair = function(req, res) {
   );
 };
 
-exports.init = function(app, config, trader, authMiddleware) {
+function init(app, config, trader, authMiddleware) {
   _lamassuConfig = config;
   _trader = trader;
 
@@ -102,6 +102,11 @@ exports.init = function(app, config, trader, authMiddleware) {
 };
 
 function getFingerprint(req) {
-  return req.connection.getPeerCertificate && 
+  return typeof req.connection.getPeerCertificate === 'function' &&
     req.connection.getPeerCertificate().fingerprint;
-}
+};
+
+module.exports = {
+  init: init,
+  getFingerprint: getFingerprint
+};