This is about Point of Sale - not Proof of Steak in this case. Was used at ethereum meetup so people could buy beverages with DAI. Leverages ERC-681 so the user does not need to enter amount and the token to use. Intended to run on a tablet in landscape mode.
Roots of this project are in hack started at the first WindingTree hackathon.
The data is loaded from a JSON file so you can use it for your own event.
If you are using it for your event - please send pics!-)
GPLv3