I need to try to add a  new 'state' to the order that receive from odoo 8 ecommerce.

I think I can use something like this https://www.odoo.com/forum/help-1/question/how-do-i-add-new-state-and-change-the-workflow-of-purchase-order-5118 to add a state to the order and prevent that the seller receive an email with all price before I can check the stuff.

I don't find the ecommerce workflow to study it. Can someone help me?