simplify wallet object

lib/model/wallet.js

@@ -3,8 +3,6 @@
 var _ = require('lodash');
 
 var Copayer = require('./copayer');
-var Bitcore = require('bitcore');
-var PublicKey = Bitcore.PublicKey;
 var WALLET_VERSION = '1.0.0';
 
 function Wallet(opts) {
@@ -20,9 +18,7 @@ function Wallet(opts) {
 	this.addressIndex = 0;
 	this.copayers = [];
   this.version = WALLET_VERSION;
-
+  this.pubKey = opts.pubKey;
-  if (opts.pubKey)
-    this.pubKey = new PublicKey(opts.pubKey);
 };
 
 
@@ -49,8 +45,7 @@ Wallet.fromObj = function (obj) {
 	x.copayers = _.map(obj.copayers, function (copayer) {
 		return new Copayer(copayer);
 	});
-  x.pubKey = new PublicKey(obj.pubKey);
+  x.pubKey = obj.pubKey;
-
 
 	return x;
 };