use getTotalAmount() instead of amount field

lib/server.js

@@ -1241,7 +1241,7 @@ WalletService.prototype._selectTxInputs = function(txp, utxosToExclude, cb) {
     }
 
     if (totalAmount < txp.getTotalAmount()) return cb(Errors.INSUFFICIENT_FUNDS);
-    if (availableAmount < txp.amount) return cb(Errors.LOCKED_FUNDS);
+    if (availableAmount < txp.getTotalAmount()) return cb(Errors.LOCKED_FUNDS);
 
     // Prepare UTXOs list
     utxos = _.reject(utxos, 'locked');
@@ -2088,7 +2088,7 @@ WalletService.prototype.getTxHistory = function(opts, cb) {
   var self = this;
 
   opts = opts || {};
-  opts.limit =  (_.isUndefined(opts.limit) ? HISTORY_LIMIT : opts.limit);
+  opts.limit = (_.isUndefined(opts.limit) ? HISTORY_LIMIT : opts.limit);
   if (opts.limit > HISTORY_LIMIT)
     return cb(Errors.HISTORY_LIMIT_EXCEEDED);