From: Andreas Schildbach <andreas@schildbach•de>
To: bitcoin-dev@lists•linuxfoundation.org
Subject: Re: [bitcoin-dev] Removal of reject network messages from Bitcoin Core (BIP61)
Date: Wed, 6 Mar 2019 17:49:20 +0100 [thread overview]
Message-ID: <q5otmg$4vh7$1@blaine.gmane.org> (raw)
In-Reply-To: <CAK51vgDO2Tg38XbW0pqAnO3ETJ_qf8owRsUYsTXmrf7H2yGZtw@mail.gmail.com>
Reject messages cannot be replaced for debugging user problems. At least
unless you plan to make RPC or bitcoind logfiles available via the P2P
protocol (both probably not a good idea).
The typical case is, I get mailed a wallet logfile with reject messages
and that's all I have. I cannot access the bitcoind logfile(s) of the
node(s) that generated the reject message in the first place. Nor can I
access their RPC interface.
I strongly suggest re-enabling reject messages by default before 0.18.
On 06/03/2019 01.53, Marco Falke via bitcoin-dev 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
>
next prev parent reply other threads:[~2019-03-06 17:04 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-06 0:53 Marco Falke
2019-03-06 4:00 ` Dustin Dettmer
2019-03-06 16:49 ` Andreas Schildbach [this message]
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
2019-10-21 8:44 ` Andreas Schildbach
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