From: Erik Aronesty <erik@q32.com>
To: Pieter Wuille <bitcoin-dev@wuille.net>,
Bitcoin Protocol Discussion
<bitcoin-dev@lists.linuxfoundation.org>
Cc: lightning-dev <lightning-dev@lists.linuxfoundation.org>
Subject: Re: [bitcoin-dev] [Lightning-dev] Removing the Dust Limit
Date: Fri, 1 Oct 2021 09:40:06 -0400 [thread overview]
Message-ID: <CAJowKgKt=yYdNOYYNsWh7FJ2EH7rz0bd2EjUjmyA=cA6k5cvUQ@mail.gmail.com> (raw)
In-Reply-To: <MkPutJpff5rqUxXFQrEyHZl6Iz0DfrJU_-BQD-y0El65GQFnj7igVfmWU79fPCtiFztUYl4ofzrqeaN0HFMB45YPErY9rYY7_h1XkuTMfvc=@wuille.net>
mostly thinking out loud
suppose there is a "lightweight" node:
1. ignores utxo's below the dust limit
2. doesn't validate dust tx
3. still validates POW, other tx, etc.
these nodes could possibly get forked - accepting a series of valid,
mined blocks where there is an invalid but ignored dust tx, however
this attack seems every bit as expensive as a 51% attack
On Fri, Oct 1, 2021 at 3:45 AM Pieter Wuille via bitcoin-dev
<bitcoin-dev@lists.linuxfoundation.org> wrote:
>
> Jumping in late to this thread.
>
> I very much agree with how David Harding presents things, with a few comments inline.
>
> ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
> On Sunday, August 8th, 2021 at 5:51 PM, David A. Harding via bitcoin-dev <bitcoin-dev@lists.linuxfoundation.org> wrote:
>
> > > 1. it's not our business what outputs people want to create
> >
> > Every additional output added to the UTXO set increases the amount of
> > work full nodes need to do to validate new transactions. For miners
> > for whom fast validation of new blocks can significantly affect their
> > revenue, larger UTXO sets increase their costs and so contributes
> > towards centralization of mining.
> > Allowing 0-value or 1-sat outputs minimizes the cost for polluting the
> > UTXO set during periods of low feerates.
> > If your stuff is going to slow down my node and possibly reduce my
> > censorship resistance, how is that not my business?
>
> Indeed - UTXO set size is an externality that unfortunately Bitcoin's consensus rules fail to account
> for. Having a relay policy that avoids at the very least economically irrational behavior makes
> perfect sense to me.
>
> It's also not obvious how consensus rules could deal with this, as you don't want consensus rules
> with hardcoded prices/feerates. There are possibilities with designs like transactions getting
> a size/weight bonus/penalty, but that's both very hardforky, and hard to get right without
> introducing bad incentives.
>
> > > 2. dust outputs can be used in various authentication/delegation smart
> > > contracts
> >
> > > 3. dust sized htlcs in lightning (
> > > https://bitcoin.stackexchange.com/questions/46730/can-you-send-amounts-that-would-typically-be-considered-dust-through-the-light)
> > > force channels to operate in a semi-trusted mode
> >
> > > 4. thinly divisible colored coin protocols might make use of sats as value
> > > markers for transactions.
>
> My personal, and possibly controversial, opinion is that colored coin protocols have no business being on the Bitcoin chain, possibly
> beyond committing to an occasional batched state update or so. Both because there is little benefit for tokens with a trusted
> issuer already, and because it competes with using Bitcoin for BTC - the token that pays for its security (at least as long as
> the subsidy doesn't run out).
>
> Of course, personal opinions are no reason to dictate what people should or can use the chain for, but I do think it's reason to
> voice hesitancy to worsening the system's scalability properties only to benefit what I consider misguided use.
>
> > > 5. should we ever do confidential transactions we can't prevent it without
> > > compromising privacy / allowed transfers
> >
> > I'm not an expert, but it seems to me that you can do that with range
> > proofs. The range proof for >dust doesn't need to become part of the
> > block chain, it can be relay only.
>
> Yeah, range proofs have a non-hidden range; the lower bound can be nonzero, which could be required as part of a relay policy.
>
> Cheers,
>
> --
> Pieter
>
> _______________________________________________
> bitcoin-dev mailing list
> bitcoin-dev@lists.linuxfoundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
next prev parent reply other threads:[~2021-10-01 13:40 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-08 18:52 [bitcoin-dev] Removing the Dust Limit Jeremy
2021-08-08 21:14 ` Matt Corallo
2021-08-08 21:41 ` Oleg Andreev
2021-08-08 21:51 ` [bitcoin-dev] [Lightning-dev] " David A. Harding
2021-08-08 22:46 ` Jeremy
2021-08-08 23:07 ` Jeremy
2021-09-30 22:07 ` Pieter Wuille
2021-10-01 13:40 ` Erik Aronesty [this message]
2021-10-07 4:52 ` ZmnSCPxj
2021-10-07 8:17 ` LORD HIS EXCELLENCY JAMES HRMH
2021-10-07 8:34 ` LORD HIS EXCELLENCY JAMES HRMH
2021-10-07 10:35 ` LORD HIS EXCELLENCY JAMES HRMH
2021-10-07 9:13 ` shymaa arafat
2021-10-07 10:01 ` ZmnSCPxj
[not found] ` <CAM98U8kKud-7QoJKYd5o245o8vGeUD7YD2OnXF_QeKaO33dSTw@mail.gmail.com>
[not found] ` <MCYvJzqskIC56X-ylVCNgdaVk6SNnpCE6GgssXxK-znwwK4MoA41a2A-yNuCG8s99ll3h__YjCjBlP99A27Clbip-aYbF2ZwLpZ0SJT0j2U=@protonmail.com>
2021-10-08 7:44 ` shymaa arafat
2021-10-08 10:38 ` ZmnSCPxj
2021-10-08 22:47 ` ZmnSCPxj
2021-08-09 13:22 ` Antoine Riard
2021-08-10 0:30 ` Billy Tetrud
2021-08-10 5:04 ` Jeremy
2021-08-10 5:44 ` Billy Tetrud
2021-08-10 11:37 ` ZmnSCPxj
2021-08-10 18:39 ` Charlie Lee
2021-08-10 6:14 ` David A. Harding
2021-08-10 22:37 ` Antoine Riard
2021-08-11 0:46 ` ZmnSCPxj
2021-08-12 22:03 ` Anthony Towns
2021-08-20 4:51 ` Jeremy
2021-08-20 5:45 ` shymaa arafat
2021-08-21 3:10 ` ZmnSCPxj
2021-08-26 21:21 ` Billy Tetrud
2021-08-27 9:07 ` shymaa arafat
2021-08-30 3:31 ` LORD HIS EXCELLENCY JAMES HRMH
2021-08-18 19:06 shymaa arafat
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