Implemented user transactions

lib/bitstamp.rb

@@ -9,6 +9,7 @@
 require 'bitstamp/model'
 
 require 'bitstamp/orders'
+require 'bitstamp/transactions'
 require 'bitstamp/ticker'
 
 String.send(:include, ActiveSupport::Inflector)
@@ -30,6 +31,12 @@ def self.orders
     @@orders ||= Bitstamp::Orders.new
   end
 
+  def self.user_transactions
+    self.sanity_check!
+
+    @@transactions ||= Bitstamp::UserTransactions.new
+  end
+
   def self.balance
     self.sanity_check!
 

lib/bitstamp/helper.rb

@@ -1,6 +1,9 @@
 module Bitstamp
   module Helper
     def self.parse_objects!(string, klass)
+      # If Bitstamp returned nothing (which it does if the results yield empty) 'cast' it to an array
+      string = "[]" if string == ""
+
       objects = JSON.parse(string)
       objects.collect do |t_json|
         parse_object!(t_json, klass)

lib/bitstamp/model.rb

@@ -1,5 +1,7 @@
 module Bitstamp
   class Model
+    attr_accessor :error, :message
+
     if ActiveModel::VERSION::MAJOR <= 3
       include ActiveModel::Validations
       include ActiveModel::Conversion