Hi > I have some experience with hardware wallet development and its > integration and I know it's a mess. But it is too early to define such > rigid standards yet. Also, TREZOR concept (device as a server and the > primary source of workflow management) goes directly against your > proposal of wallet software as an workflow manager. So it is clear NACK > for me. The current question – as already mentioned – is we ACK to work together on a signing protocol or if we NACK this before we even have started. I'm not saying that the draft proposal I made is the way to go, I'm happy to NACK it myself in favor of a better proposal. I strongly recommend to work together on a standard that will have one central winner: the end user.