A quick primer on how keys and frames work in FC.  During sign up: 

1. User creates eth key on their phone.
2. Warpcast creates account key on its server. 
3. User approves account key onchain 

Eth keys can hold funds and can control your account. Account keys can only post messages from your account.

Technowatermelon. Elder Millenial. Building Farcaster. 

nf.td/varun

I’d recommend Option 2 in the short-term and see how it’s used before deciding if Option 1 is viable or whether to build Option 3.

Option 1 with cross-app support is viable with tx monitoring and session keys to scope in limited low-value permissions per Frame. But that stack is not mature yet.

Crypto is built around the UX vs security/risk trade off. 

So to keep high UX, you can do things like only submitting certain types of txs  (free mints) or only keeping small amount of capital in the wallet.

You don’t know the scope of what devs will want to do yet bc this is all very new.

So I’d recommend doing #2 for now and devs like myself will try out Option 1 in low risk scenarios, tx monitored scenarios and see what users like and dislike.