From: Peter Todd <pete@petertodd•org>
To: Bitcoin Protocol Discussion <bitcoin-dev@lists•linuxfoundation.org>
Cc: Daniel Lipshitz <daniel@gap600•com>
Subject: Re: [bitcoin-dev] Announcement: Full-RBF Miner Bounty
Date: Tue, 6 Dec 2022 02:37:27 -0500 [thread overview]
Message-ID: <Y47xN07/QSy5W++I@petertodd.org> (raw)
In-Reply-To: <Y47VnGNMt/p5W32U@petertodd.org>
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On Tue, Dec 06, 2022 at 12:39:40AM -0500, Peter Todd via bitcoin-dev wrote:
> 10 or 20 nodes is completely meaningless. Pools run nodes themselves, which by
> default connect to 8 outgoing peers. There's about 5000 IPv4 listening nodes on
> the network. When a node learns of a new block, it tells all it's peers that
> the new block exists.
>
> For your censorship to work, there has to be a substantial propability that a
> miner *only* runs a single node (they don't), that has no incoming peers, and
> all 8 peers of that node happen to be one of your 20 censoring nodes.
> Obviously, since the probability of a given peer being a censoring node is
> 20/5000, all 8 being censored is extraordinarily unlikely.
>
> Even if you ran so many nodes that 20% of the entire network was censoring, the
> probability of all 8 outgoing peers being censors is only 0.2^8 = 0.000256%
>
>
> This is an example of information being hard to censor and easy to spread. In
> fact, for full-rbf this same math works in our favor: for a node to have a 50%
> chance of connecting to at least one full-rbf peer, just 8.3% of the network
> needs to run full-rbf. 5000 IPv4 nodes * 8% = 400 nodes.
>
> The percolation threshold doesn't need to be met for this to be succesful,
> because someone to just run a full-rbf node that connects to every single
> listening node simultaneously.
FYI here's a percolation simulator for full-rbf:
https://github.com/mzumsande/fullrbf_simulation
It finds similar results to my math above.
--
https://petertodd.org 'peter'[:-1]@petertodd.org
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next prev parent reply other threads:[~2022-12-06 7:37 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-02 9:26 Peter Todd
2022-11-02 19:02 ` alicexbt
2022-11-03 13:32 ` Erik Aronesty
2022-11-09 12:14 ` email
2022-11-08 18:16 ` Peter Todd
2022-11-15 5:36 ` Anthony Towns
2022-11-15 14:43 ` Peter Todd
2022-12-05 12:20 ` El_Hoy
2022-12-05 13:38 ` Greg Sanders
2022-12-05 14:12 ` Rijndael
2022-12-05 15:33 ` Michael Folkson
2022-12-05 17:00 ` Erik Aronesty
2022-12-06 4:48 ` El_Hoy
2022-12-05 17:25 ` El_Hoy
2022-12-06 5:39 ` Peter Todd
2022-12-06 7:37 ` Peter Todd [this message]
2022-12-09 16:04 ` 0xB10C
2022-12-09 21:16 ` Peter Todd
2022-12-10 11:59 ` 0xB10C
2022-12-10 18:07 ` Peter Todd
2022-12-13 4:01 ` Anthony Towns
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