On Thu, Aug 18, 2016 at 11:49 AM, Jonas Schnelli via bitcoin-dev <bitcoin-dev@lists.linuxfoundation.org> wrote:
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.

ACK for Ledger. What's necessary to sign a transaction is well known, I don't see how driving any hardware wallet from the wallet itself or from a third party daemon implementing that URL scheme would make any difference, other than providing better devices interoperability, as well as easier maintenance and update paths for the wallets.

--
Nicolas Bacca | CTO, Ledger