Anti-klepto should be part of PSBT as extra field
HWW creating own custom protocols goes against all that we have done for PSBT open standard
BTW xfill can be defeated w/ deterministic builds
Breaking HWW airgap w/ USB for this attack is just about the dumbest tradeoff
It should be, yes!
Deterministic builds do not fix key exfiltration because there is no way to verify that what you are flashing is what's actually running on the device.
Find my reasoning here: https://shiftcrypto.ch/blog/how-almost-all-hardware-wallets-can-steal-your-seed/
