The bot can handle the menu items

Here we have the divider between dumb and smart cards.

Those menu items on the mobile form are contract items the user must select to complete the transaction. In smart card, the bot knows that menu by prior agreement, the user sees a one or two line total amount, and just thumb prints the whole affair. More like an extremely portable checkout terminal.

We can see this is easily doable and verifiable by our language folks in software, and they do, and they should be embedded.  We can read and sign an agreement, prior to the transactions. The bot obeys, and protects.

Then the LCD goes away, we get the standard, but counterfeit proof, plastic card. Pure cash, autonomous agents bound to honest contracted accounting. A handheld contract manager. This device requires a deal with NSA, a precondition on smart. Make that deal, get a sensible compromise, move forward.