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From: Jacob Eliosoff <jacob.eliosoff@gmail.com>
To: Matt Corallo <lf-lists@mattcorallo.com>,
	 Bitcoin Dev <bitcoin-dev@lists.linuxfoundation.org>
Subject: Re: [bitcoin-dev] OP_CODESEPARATOR Re: BIP Proposal: The Great Consensus Cleanup
Date: Tue, 12 Mar 2019 18:39:28 -0400	[thread overview]
Message-ID: <CAAUaCyixU14z-ym6s62b_BDn2c4TL9jEk-Fa7VwPeNWPm9SPbg@mail.gmail.com> (raw)
In-Reply-To: <88C160CE-F2CE-4D6E-BA1F-40E219A1659E@mattcorallo.com>

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Also, if future disabling isn't the point of making a tx type like
OP_CODESEPARATOR non-standard - what is?  If we're committed to indefinite
support of these oddball features, what do we gain by making them hard to
use/mine?

I see questions like "Is it possible someone's existing tx relies on this?"
as overly black-and-white.  We all agree it's possible: the question is how
likely, vs the harms of continued support - including not just security
risks but friction on other useful changes, safety/correctness analyses,
etc.

It is so easy to say stuff like this when one's own money isn't what is at
risk.


Stepping back for a second here:  I dispute this framing.  My money *is* at
risk, because the value of my bitcoins depends on adoption and feature
growth.  And I've long viewed an absolutist, actual-known-user-indifferent
approach to backwards compatibility as the #1 impediment to Bitcoin's
adoption and growth.

Again, the point being not to throw caution to the wind, but that a case
like this where extensive research unearthed zero users, is taking caution
too far.


On Tue, Mar 12, 2019, 5:48 PM Matt Corallo via bitcoin-dev <
bitcoin-dev@lists.linuxfoundation.org> wrote:

> Note that even your carve-outs for OP_NOP is not sufficient here - if you
> were using nSequence to tag different pre-signed transactions into
> categories (roughly as you suggest people may want to do with extra sighash
> bits) then their transactions could very easily have become
> un-realistically-spendable. The whole point of soft forks is that we
> invalidate otherwise-unused bits of the protocol. This does not seem
> inconsistent with the proposal here.
>
> > On Mar 9, 2019, at 13:29, Russell O'Connor <roconnor@blockstream.io>
> wrote:
> > Bitcoin has *never* made a soft-fork, since the time of Satoishi, that
> invalidated transactions that send secured inputs to secured outputs
> (excluding uses of OP_NOP1-OP_NOP10).
>
> _______________________________________________
> bitcoin-dev mailing list
> bitcoin-dev@lists.linuxfoundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>
>

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  reply	other threads:[~2019-03-12 22:39 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-06 21:39 [bitcoin-dev] BIP Proposal: The Great Consensus Cleanup Matt Corallo
2019-03-07 10:44 ` Luke Dashjr
2019-03-07 19:44   ` Matt Corallo
2019-03-07 15:03 ` [bitcoin-dev] OP_CODESEPARATOR " Russell O'Connor
2019-03-07 19:50   ` Matt Corallo
2019-03-08 15:57     ` Russell O'Connor
2019-03-08 18:35       ` Matt Corallo
2019-03-09 18:29         ` Russell O'Connor
2019-03-10  3:25           ` Jacob Eliosoff
2019-03-11 17:49             ` Russell O'Connor
2019-03-12 21:08           ` Matt Corallo
2019-03-12 22:39             ` Jacob Eliosoff [this message]
2019-03-13  0:54               ` Gregory Maxwell
2019-03-13  1:34               ` Russell O'Connor
2019-03-08 19:12     ` Sjors Provoost
2019-03-08 20:14       ` Matt Corallo
2019-03-10 14:25         ` LORD HIS EXCELLENCY JAMES HRMH
2019-03-10 18:24           ` Moral Agent
2019-03-12  7:34             ` LORD HIS EXCELLENCY JAMES HRMH
2019-03-10 18:28           ` Dustin Dettmer
2019-03-11 19:15             ` Russell O'Connor
2019-03-12  2:23               ` Matt Corallo
2019-03-13  1:38                 ` Russell O'Connor
2019-03-09 18:29       ` Russell O'Connor
     [not found]       ` <PS2P216MB0179EFBEF7BEEE1C3F251F719D4E0@PS2P216MB0179.KORP216.PROD.OUTLOOK.COM>
2019-03-10 15:22         ` Russell O'Connor
2019-03-07 15:16 ` [bitcoin-dev] Sighash Type Byte; " Russell O'Connor
2019-03-07 19:57   ` Matt Corallo
2019-03-08 15:57     ` Russell O'Connor
2019-03-13  1:34       ` Russell O'Connor

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