We are a trading company and have implemented Odoo 13 recently; using Odoo.sh

We would like to further refine the User Permissions.

We want something like a Maker Checker rule based system.

The "normal user" should be allowed to create the transactions in specified groups, but not post them.

The "manager user" only will have the right to Post (or edit/delete if necessary) the transactions. 

Request if you can share your experience.

Also we are happy to buy an app if available with this functionality.

Thanks