public inbox for bitcoindev@googlegroups.com
 help / color / mirror / Atom feed
From: John Newbery <john@johnnewbery.com>
To: Marco Falke via bitcoin-dev <bitcoin-dev@lists.linuxfoundation.org>
Subject: Re: [bitcoin-dev] Removal of reject network messages from Bitcoin Core (BIP61)
Date: Fri, 18 Oct 2019 16:53:23 -0400	[thread overview]
Message-ID: <CAFmfg2sU=ur7NdzU6r9bGC=xZqcX7WA7ux-r8QOwNa+FKhS4Pw@mail.gmail.com> (raw)
In-Reply-To: <CAFmfg2u3cLwG4h=tSF1+ho__1n2n4xyBGH+mwQgVYE9c_s+EMw@mail.gmail.com>

[-- Attachment #1: Type: text/plain, Size: 3754 bytes --]

> Is there a NODE_* bit we can use to pick peers that support this (useful!)
feature?

No. BIP 61 has no mechanism for advertising that a node will send REJECT
messages.

On Wed, Oct 16, 2019 at 12:43 PM John Newbery <john@johnnewbery.com> wrote:

> Following discussion on this mailing list, support for BIP 61 REJECT
> messages was not removed from Bitcoin Core in V0.19. The behaviour in that
> upcoming release is that REJECT messages are disabled by default and can be
> enabled using the `-enablebip61` command line option.
>
> Support for REJECT messages will be removed entirely in Bitcoin Core
> V0.20, expected for release in mid 2020. The PR to remove support was
> merged into Bitcoin Core's master branch this week.
>
> Adoption of new Bitcoin Core versions across reachable nodes generally
> takes several months. https://bitnodes.earn.com/dashboard/?days=365 shows
> that although v0.18 was released in May 2019, there are still several
> hundred reachable nodes on V0.17, V0.16, V0.15 and earlier software.
> Software that currently use REJECT messages from public nodes for
> troubleshooting issues therefore have plenty of time to transition to one
> of the methods listed by Marco in the email above.
>
> John
>
> On Tue, Mar 5, 2019 at 10:28 PM Marco Falke via bitcoin-dev <
> bitcoin-dev@lists.linuxfoundation.org> wrote:
>
>> Bitcoin Core may send "reject" messages as response to "tx", "block" or
>> "version" messages from a network peer when the message could not be
>> accepted.
>>
>> This feature is toggled by the `-enablebip61` command line option and has
>> been
>> disabled by default since Bitcoin Core version 0.18.0 (not yet released
>> as of
>> time of writing). Nodes on the network can not generally be trusted to
>> send
>> valid ("reject") messages, so this should only ever be used when
>> connected to a
>> trusted node. At this time, I am not aware of any software that requires
>> this
>> feature, and I would like to remove if from Bitcoin Core to make the
>> codebase
>> slimmer, easier to understand and maintain. Let us know if your
>> application
>> relies on this feature and you can not use any of the recommended
>> alternatives:
>>
>> * Testing or debugging of implementations of the Bitcoin P2P network
>> protocol
>>   should be done by inspecting the log messages that are produced by a
>> recent
>>   version of Bitcoin Core. Bitcoin Core logs debug messages
>>   (`-debug=<category>`) to a stream (`-printtoconsole`) or to a file
>>   (`-debuglogfile=<debug.log>`).
>>
>> * Testing the validity of a block can be achieved by specific RPCs:
>>   - `submitblock`
>>   - `getblocktemplate` with `'mode'` set to `'proposal'` for blocks with
>>     potentially invalid POW
>>
>> * Testing the validity of a transaction can be achieved by specific RPCs:
>>   - `sendrawtransaction`
>>   - `testmempoolaccept`
>>
>> * Wallets should not use the absence of "reject" messages to indicate a
>>   transaction has propagated the network, nor should wallets use "reject"
>>   messages to set transaction fees. Wallets should rather use fee
>> estimation
>>   to determine transaction fees and set replace-by-fee if desired. Thus,
>> they
>>   could wait until the transaction has confirmed (taking into account the
>> fee
>>   target they set (compare the RPC `estimatesmartfee`)) or listen for the
>>   transaction announcement by other network peers to check for
>> propagation.
>>
>> I propose to remove "reject" messages from Bitcoin Core 0.19.0 unless
>> there are
>> valid concerns about its removal.
>>
>> Marco
>> _______________________________________________
>> bitcoin-dev mailing list
>> bitcoin-dev@lists.linuxfoundation.org
>> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>>
>

[-- Attachment #2: Type: text/html, Size: 5093 bytes --]

  parent reply	other threads:[~2019-10-18 20:53 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-06  0:53 [bitcoin-dev] Removal of reject network messages from Bitcoin Core (BIP61) Marco Falke
2019-03-06  4:00 ` Dustin Dettmer
2019-03-06 16:49 ` Andreas Schildbach
2019-03-07 13:59   ` Sjors Provoost
2019-03-07 17:58     ` Andreas Schildbach
2019-03-08  0:52       ` Gregory Maxwell
2019-03-12 17:08         ` Andreas Schildbach
2019-03-12 22:14           ` Gregory Maxwell
2019-03-13 14:29             ` Andreas Schildbach
2019-03-13 14:41             ` Oscar Guindzberg
2019-03-13 22:30               ` Dustin Dettmer
2019-03-14  9:46                 ` Aymeric Vitte
2019-03-07 20:52 ` Aymeric Vitte
2019-03-08  0:09 ` Wilmer Paulino
2019-03-08  0:30   ` Eric Voskuil
2019-10-16 16:43 ` John Newbery
2019-10-17 19:38   ` Andreas Schildbach
2019-10-17 20:16     ` Eric Voskuil
2019-10-18 22:45       ` David A. Harding
2019-10-20  5:13         ` Eric Voskuil
2019-10-18 20:53   ` John Newbery [this message]
2019-10-21  8:44     ` Andreas Schildbach

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='CAFmfg2sU=ur7NdzU6r9bGC=xZqcX7WA7ux-r8QOwNa+FKhS4Pw@mail.gmail.com' \
    --to=john@johnnewbery.com \
    --cc=bitcoin-dev@lists.linuxfoundation.org \
    /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