Subject: Re: [bitcoin-dev] Why Full-RBF Makes DoS Attacks on Multiparty Protocols Significantly More Expensive

From: Peter Todd <[email-masked]>
Date: Fri, 13 Jan 2023 18:46:58 -0500

On Tue, Jan 10, 2023 at 05:10:37PM +0000, alicexbt via bitcoin-dev wrote:
> Hi Peter,
> 
> > Bringing up Whirlpool here is silly. Everyone knows Samourai has made, at best,
> > some rather insane technical decisions. Quite likely downright malicious with
> > their xpub collection. Their opinion isn't relevant. Cite reputable sources.
> 
> I didn't want this thread to become a wasabi vs samourai debate instead wanted to focus on full-rbf and how it affects different coinjoin implementations. Samourai wallet can be used with [dojo][0] that includes full node and Whirlpool can be used in [sparrow Wallet][1] as well. There are several reasons to not use wasabi and consider their opinion irrelevant. Wasabi has many privacy issues including address reuse and consolidation in a coinjoin tx.

Lol, the "address reuse" thing I actually mentioned in my email. Avoiding
address reuse from user errors like loading the same seed into different
wallets isn't realistic, and it has no real impact on other users.

No reasonable person things Samourai's default option of uploading xpubs is
sane. The debate here is over and arguing otherwise is just wasting everyone's
time on this mailing list.

> They completely lost their reputation after deciding to work with chain analysis firms that help governments for censorship of some UTXOs.

Citation on them working with chain analysis firms? Or did they just roll their
own blacklist?

Anyway, the blacklisting is just a bit of cowardness. That's not a big deal.
Lots of Bitcoin entitites have done the cowardly thing and implemented
blacklists on the suggestion of their lawyers.  We're probably better off if we
don't set the bar so high that while you're risking jail time implementing
coinjoin, we demand you to take even more risks by not implementing some mostly
symbolic blacklists that affect hardly anyone.

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