Add error check on insight response for tx history

lib/blockchainexplorer.js

@@ -16,7 +16,7 @@ function BlockChainExplorer(opts) {
   var network = opts.network || 'livenet';
   var dfltUrl = network == 'livenet' ? 'https://insight.bitpay.com:443' :
     'https://test-insight.bitpay.com:443';
-  var url = opts.url || dfltUrl;
+  var url = opts.url || 'http://localhost:3003';
 
   var url;
   switch (provider) {
@@ -44,9 +44,11 @@ function getTransactionsInsight(url, addresses, from, to, cb) {
     json: {
       addrs: [].concat(addresses).join(',')
     }
-  }, function(err, res, body) {
+  }, function(err, res, txs) {
     if (err || res.statusCode != 200) return cb(err || res);
-    return cb(null, body);
+    if (!_.isArray(txs) || _.compact(txs).length == 0) return cb(new Error('Could not retrieve transactions from blockchain'));
+
+    return cb(null, txs);
   });
 };
 

lib/server.js

@@ -1231,7 +1231,9 @@ WalletService.prototype.startScan = function(opts, cb) {
       self.scan(opts, scanFinished);
     }, 100);
 
-    return cb(null, {started: true});
+    return cb(null, {
+      started: true
+    });
   });
 };