FWIW, I did some real-world stuff in #SEC02 as part of Sovereign Engineering
By the end of the cohort, and after several weeks of field-testing and refinement, I was using my wallet (and payment system) as a matter of routine.
The system uses ecash under the hood (thanks to calle 👁️⚡👁️) , not readily apparent to the end user but enabled it to be super fast for payment.
