add log

lib/model/txproposal.js

@@ -3,6 +3,10 @@
 var _ = require('lodash');
 var $ = require('preconditions').singleton();
 var Uuid = require('uuid');
+var log = require('npmlog');
+log.debug = log.verbose;
+log.disableColor();
+
 var WalletUtils = require('bitcore-wallet-utils');
 var Bitcore = WalletUtils.Bitcore;
 var Address = Bitcore.Address;
@@ -310,6 +314,7 @@ TxProposal.prototype.sign = function(copayerId, signatures, xpub) {
 
     return true;
   } catch (e) {
+    log.debug(e);
     return false;
   }
 };