Ethereum Account Abstraction

I am currently exploring Session Keys for @coinbasewallet and have an open developer group to discuss ideal wallet UX.

If you want to have signature-less experiences with no wallet pop-ups, join the telegram chat and help shape our roadmap! https://t.me/+r3nLFnTj6spkNzdh

A starting prompt: Trying to think on how to make session keys reasonably safe and legible. 

What if there was a payable function like sessionKeyCallable and this was the *only* function a Smart Wallet session key could call? 

Too restrictive? Or is the right kind of simplicity?