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Subject: Re: [bitcoindev] Censorship Resistant Transaction Relay - Taking out
the garbage(man)
From: Sjors Provoost <sjors@sprovoost.nl>
In-Reply-To: <aD8z34hk6IQ21cSv@petertodd.org>
Date: Tue, 3 Jun 2025 19:51:46 +0200
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To: Peter Todd <pete@petertodd.org>
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They can broadcast an expensive signal, i.e. make a statement, with a singl=
e block even if nobody builds on it.
More cheaply, and perhaps more effective, they could publish a feed of weak=
blocks on their social media, containing the hash of each rejected block i=
n a coinbase OP_RETURN. They could mine this block for just a few seconds o=
r minutes, before resuming to mine on the tip.
Even a low success rate could serve as a deterrent to other miners against =
including "bad" transactions. Rationally the attack would have to cost abou=
t as much as the extra revenue from censored fees, but risk aversion would =
probably leverage to this strategy.
Of course I'd rather not go down this path.
- Sjors=20
> Op 3 jun 2025, om 19:41 heeft Peter Todd <pete@petertodd.org> het volgend=
e geschreven:
>=20
> On Tue, Jun 03, 2025 at 08:50:34AM +0200, Sjors Provoost wrote:
>> Or people can just spin up more Libre Relay nodes. Both miners and issue=
rs of various scam tokens have a monetary incentive to do that. Whereas pro=
ponents of filters are (so far) not willing to invest serious money. E.g. w=
hen I challenged Luke Dashjr in an earlier post to reorg a single block wit=
h spam, he didn't respond [1]. Worse, Ocean proactively offers "Core" [0] t=
emplates. Although running a node is cheap, if this becomes an arms race, t=
he side that actually spends money has the advantage.
>=20
> I need to point out that you're being unfair to Ocean here: with their <1=
% hash
> power it's damn near impossible for them to reorg blocks. The reason is b=
ecause
> if there are two blocks at the same height, Bitcoin Core accepts the firs=
t
> block seen.
>=20
> Thus if Ocean wants to reorg a "spam" block out, they need to find not ju=
st
> one, but two blocks in a row before any other miner finds one. The probab=
ility
> of that happening is (very) roughly 1% * 1% =3D 0.01% per attempt. Given =
that
> blocks are worth ~$300k these days, you're asking them to spend tens of
> millions of dollars worth of hash power just to reorg out a single block.
>=20
> It's not going to happen.
>=20
> --=20
> https://petertodd.org 'peter'[:-1]@petertodd.org
--=20
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