extract block explorer

lib/blockexplorer.js

@@ -0,0 +1,54 @@
+'use strict';
+
+var _ = require('lodash');
+var $ = require('preconditions').singleton();
+var log = require('npmlog');
+log.debug = log.verbose;
+
+var Explorers = require('bitcore-explorers');
+var request = require('request');
+
+
+function BlockExplorer(opts) {
+  $.checkArgument(opts);
+  var provider = opts.provider || 'insight';
+  var network = opts.network || 'livenet';
+
+  var url;
+
+  switch (provider) {
+    case 'insight':
+      switch (network) {
+        default:
+        case 'livenet':
+          url = 'https://insight.bitpay.com:443';
+          break;
+        case 'testnet':
+          url = 'https://test-insight.bitpay.com:443'
+          break;
+      }
+      var bc = new Explorers.Insight(url, network);
+      bc.getTransactions = _.bind(getTransactionsInsight, bc, url);
+      this.blockExplorer = bc;
+      break;
+    default:
+      throw new Error('Provider ' + provider + ' not supported');
+      break;
+  };
+};
+
+
+function getTransactionsInsight(url, addresses, cb) {
+  request({
+    method: "POST",
+    url: url + '/api/addrs/txs',
+    json: {
+      addrs: [].concat(addresses).join(',')
+    }
+  }, function(err, res, body) {
+    if (err || res.statusCode != 200) return cb(err || res);
+    return cb(null, body);
+  });
+};
+
+module.exports = BlockExplorer;

lib/server.js

@@ -10,12 +10,12 @@ var Bitcore = WalletUtils.Bitcore;
 var PublicKey = Bitcore.PublicKey;
 var HDPublicKey = Bitcore.HDPublicKey;
 var Address = Bitcore.Address;
-var Explorers = require('bitcore-explorers');
 
 var ClientError = require('./clienterror');
 var Utils = require('./utils');
 var Storage = require('./storage');
 var EventBroadcaster = require('./eventbroadcaster');
+var BlockExplorer = require('./blockexplorer');
 
 var Wallet = require('./model/wallet');
 var Copayer = require('./model/copayer');
@@ -336,42 +336,14 @@ WalletService.prototype.verifyMessageSignature = function(opts, cb) {
 
 
 WalletService.prototype._getBlockExplorer = function(provider, network) {
-  var url;
-
-  function getTransactionsInsight(url, addresses, cb) {
-    var request = require('request');
-    request({
-      method: "POST",
-      url: url + '/api/addrs/txs',
-      json: {
-        addrs: [].concat(addresses).join(',')
-      }
-    }, function(err, res, body) {
-      if (err || res.statusCode != 200) return cb(err || res);
-      return cb(null, body);
+  if (!this.blockExplorer) {
+    this.blockexplorer = new BlockExplorer({
+      provider: provider,
+      network: network,
     });
-  };
-
-  if (this.blockExplorer)
-    return this.blockExplorer;
-
-  switch (provider) {
-    default: ;
-    case 'insight':
-      switch (network) {
-        default:
-        case 'livenet':
-          url = 'https://insight.bitpay.com:443';
-          break;
-        case 'testnet':
-          url = 'https://test-insight.bitpay.com:443'
-          break;
-      }
-      var bc = new Explorers.Insight(url, network);
-      bc.getTransactions = _.bind(getTransactionsInsight, bc, url);
-      return bc;
-      break;
   }
+
+  return this.blockExplorer;
 };
 
 /**