What if smart wallets had keys with different auth levels? 

1. A root key, which can do anything, which lives in your fav wallet
2. An FC key, which can only interact with FC contracts, which lives in Warpcast 

Is there a standard for something like this?

Technowatermelon. Elder Millenial. Building Farcaster. 

nf.td/varun

FC might be the first app that could leverage limited auth keys because; 

1. Actions like SIWF are entirely offchain, and can be easily validated
2. The contracts don't have ways to interact with them that can create unbounded spend, so you can lock down interactions to just buying storage which limits potential for abuse