diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 3ea39cf..16a8765 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -6,4 +6,15 @@ class ApplicationController < ActionController::Base
   rescue_from CanCan::AccessDenied do |exception|
     redirect_to root_url, alert: exception.message
   end
+
+  def current_client
+    @current_client ||= identify_client
+  end
+
+  private
+
+  def identify_client
+    key = request.headers["X-API-KEY"]
+    Client.find_by key: key if key
+  end
 end
diff --git a/app/controllers/transactions_controller.rb b/app/controllers/transactions_controller.rb
index ce60de4..5257ce8 100644
--- a/app/controllers/transactions_controller.rb
+++ b/app/controllers/transactions_controller.rb
@@ -1,4 +1,5 @@
 class TransactionsController < ApplicationController
+  skip_before_filter :verify_authenticity_token, :only => :create
 
   def index
     @transactions = Transaction.all
@@ -9,7 +10,8 @@ class TransactionsController < ApplicationController
   end
 
   def create
-    @transaction = current_user.outgoing_transactions.build transaction_params.merge(origin: I18n.t('origin.created_by_user'))
+    @transaction = current_user.outgoing_transactions.build(
+      transaction_params.merge(origin: I18n.t('origin.created_by_user'))
 
     if @transaction.save
       redirect_to current_user
diff --git a/app/datatables/transaction_datatable.rb b/app/datatables/transaction_datatable.rb
index 69ebfa3..3220a0d 100644
--- a/app/datatables/transaction_datatable.rb
+++ b/app/datatables/transaction_datatable.rb
@@ -2,7 +2,7 @@ class TransactionDatatable < AjaxDatatablesRails::Base
   include TransactionsHelper
 
   def sortable_columns
-    @sortable_columns ||= ['Transaction.amount']
+    @sortable_columns ||= ['Transaction.created_at']
   end
 
   def searchable_columns