[Bitcoin-development] Version bits proposal

Jorge Timón jtimon at jtimon.cc
Wed May 27 03:51:00 UTC 2015


It would also help to see the actual code changes required, which I'm sure
will be much shorter than the explanation itself.
On May 27, 2015 5:47 AM, "Luke Dashjr" <luke at dashjr.org> wrote:

> On Wednesday, May 27, 2015 1:48:05 AM Pieter Wuille wrote:
> > Feel free to comment. As the gist does not support notifying participants
> > of new comments, I would suggest using the mailing list instead.
>
> I suggest adding a section describing how this interacts with and changes
> GBT.
>
> Currently, the client tells the server what the highest block version it
> supports is, and the server indicates a block version to use in its
> template,
> as well as optional instructions for the client to forcefully use this
> version
> despite its own maximum version number. Making the version a bitfield
> contradicts the increment-only assumption of this design, and since GBT
> clients are not aware of overall network consensus state, reused bits can
> easily become confused. I suggest, therefore, that GBT clients should
> indicate
> (instead of a maximum supported version number) a list of softforks by
> identifier keyword, and the GBT server respond with a template indicating:
> - An object of softfork keywords to bit values, that the server will
> accept.
> - The version number, as presently conveyed, indicating the preferred
> softfork
> flags.
>
> Does this sound reasonable, and/or am I missing anything else?
>
> Luke
>
>
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