Subject: Re: [bitcoindev] Censorship Resistant Transaction Relay - Taking out the garbage(man)

From: Peter Todd <[email-masked]>
Date: Tue, 3 Jun 2025 17:41:51 +0000

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 issuers of various scam tokens have a monetary incentive to do that. Whereas proponents of filters are (so far) not willing to invest serious money. E.g. when I challenged Luke Dashjr in an earlier post to reorg a single block with spam, he didn't respond [1]. Worse, Ocean proactively offers "Core" [0] templates. Although running a node is cheap, if this becomes an arms race, the side that actually spends money has the advantage.

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 because
if there are two blocks at the same height, Bitcoin Core accepts the first
block seen.

Thus if Ocean wants to reorg a "spam" block out, they need to find not just
one, but two blocks in a row before any other miner finds one. The probability
of that happening is (very) roughly 1% * 1% = 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.

It's not going to happen.

-- 
https://petertodd.org 'peter'[:-1]@petertodd.org

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