From: Gregory Maxwell <greg@xiph•org>
To: Pieter Wuille <pieter.wuille@gmail•com>,
Bitcoin Protocol Discussion
<bitcoin-dev@lists•linuxfoundation.org>
Subject: Re: [bitcoin-dev] Should Graftroot be optional?
Date: Thu, 24 May 2018 02:08:07 +0000 [thread overview]
Message-ID: <CAAS2fgRXYtTyqqQp8Ehs_q_KsT7usA+vYSmngStnndd1rWNVNw@mail.gmail.com> (raw)
In-Reply-To: <CAPg+sBh4CESPV_5TpPn0H3Zpv2Ump_0txxS63W_S2f3Lxezq1A@mail.gmail.com>
On Thu, May 24, 2018 at 1:58 AM, Pieter Wuille via bitcoin-dev
<bitcoin-dev@lists•linuxfoundation.org> wrote:
> Thanks everyone who commented so far, but let me clarify the context
> of this question first a bit more to avoid getting into the weeds too
> much.
My understanding of the question is this:
Are there any useful applications which would be impeded if a signing
party who could authorize an arbitrary transaction spending a coin had
the option to instead sign a delegation to a new script?
The reason this question is interesting to ask is because the obvious
answer is "no": since the signer(s) could have signed an arbitrary
transaction instead, being able to delegate is strictly less powerful.
Moreover, absent graftroot they could always "delegate" non-atomically
by spending the coin with the output being the delegated script that
they would have graftrooted instead.
Sometimes obvious answers have non-obvious counter examples, e.g.
Andrews points related to blindsigning are worth keeping in mind.
next prev parent reply other threads:[~2018-05-24 2:08 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-22 18:17 Pieter Wuille
2018-05-23 6:15 ` ZmnSCPxj
2018-05-23 13:50 ` Andrew Poelstra
2018-05-23 17:52 ` Andrew Poelstra
2018-05-25 9:46 ` Johnson Lau
2018-05-23 22:06 ` Natanael
2018-05-23 23:45 ` Gregory Maxwell
2018-05-24 9:32 ` Natanael
2018-05-24 1:58 ` Pieter Wuille
2018-05-24 2:08 ` Gregory Maxwell [this message]
2018-05-24 9:44 ` Natanael
2018-05-24 12:39 ` Andrew Poelstra
2018-05-25 10:14 ` Johnson Lau
2018-06-01 0:25 ` Pieter Wuille
2018-06-06 12:48 ` Tim Ruffing
2018-06-06 17:04 ` Pieter Wuille
2018-06-06 21:25 ` Tim Ruffing
2018-06-20 12:12 ` ZmnSCPxj
2018-06-20 14:30 ` Gregory Maxwell
2018-06-21 7:09 ` ZmnSCPxj
2018-06-27 7:29 ` Anthony Towns
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