public inbox for bitcoindev@googlegroups.com
 help / color / mirror / Atom feed
From: "David A. Harding" <dave@dtrt.org>
To: Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>
Cc: Gregory Maxwell <gmaxwell@gmail.com>
Subject: Re: [bitcoin-dev] New BIP - v2 peer-to-peer message transport protocol (former BIP151)
Date: Sun, 24 Mar 2019 11:38:56 -0400	[thread overview]
Message-ID: <20190324153856.5k4go3ws53hs4eit@email> (raw)
In-Reply-To: <20190324132910.ss2fe4nzoneazti5@email>

[-- Attachment #1: Type: text/plain, Size: 1099 bytes --]

On Sun, Mar 24, 2019 at 09:29:10AM -0400, David A. Harding via bitcoin-dev wrote:
> Why is this optional and only specified here for some message types
> rather than being required by v2 and specified for all message types?

Gregory Maxwell discussed this with me on IRC[1].  My summary of our
conversation:

Although the BIP can easily allocate short-ids to all existing messages,
anyone who wants to add an additional protocol message later will need
to coordinate their number allocation with all other developers working
on protocol extensions.  This includes experimental and private
extensions.  At best this would be annoying, and at worst it'd be
another set of bikeshed problems we'd waste time arguing about.

Allowing nodes to continue using arbitrary command names eliminates this
coordination problem.   Yet we can also gain the advantage of saving
bandwidth by allowing mapping (with optional negotiation) of short-ids.

Now that I understand the motivation, this part of the proposal makes
sense to me.

-Dave

[1] http://www.erisian.com.au/bitcoin-core-dev/log-2019-03-24.html#l-159

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]

  reply	other threads:[~2019-03-24 15:40 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-22 21:04 [bitcoin-dev] New BIP - v2 peer-to-peer message transport protocol (former BIP151) Jonas Schnelli
2019-03-24 13:29 ` David A. Harding
2019-03-24 15:38   ` David A. Harding [this message]
2019-03-24 19:35   ` Jonas Schnelli
2019-03-25  6:32 ` Eric Voskuil

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20190324153856.5k4go3ws53hs4eit@email \
    --to=dave@dtrt.org \
    --cc=bitcoin-dev@lists.linuxfoundation.org \
    --cc=gmaxwell@gmail.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox