From: Karl Johan Alm <karljohan-alm@garage•co.jp>
To: Luke Dashjr <luke@dashjr•org>
Cc: Bitcoin Protocol Discussion <bitcoin-dev@lists•linuxfoundation.org>
Subject: Re: [bitcoin-dev] {sign|verify}message replacement
Date: Fri, 16 Mar 2018 00:38:06 +0000 [thread overview]
Message-ID: <CALJw2w49bsBNFBj3MvdzNL+Hu3zuq-dmrTv_6wgmO_ZaCXt1nA@mail.gmail.com> (raw)
In-Reply-To: <201803151414.06301.luke@dashjr.org>
On Thu, Mar 15, 2018 at 2:14 PM, Luke Dashjr <luke@dashjr•org> wrote:
> Not necessarily specific UTXOs (that would contradict fungibility, as well as
> be impossible for hot/cold wallet separation), but just to prove funds are
> available. The current sign message cannot be used to prove present possession
> of funds, only that you receive funds.
By saying "not necessarily specific UTXOs", are you saying it may be
spent outputs? I'm a little confused I think.
On Thu, Mar 15, 2018 at 8:53 PM, Jim Posen <jim.posen@gmail•com> wrote:
> In this general signing-a-script context, I think a verifier might want to
> see the time conditions under which it may be spent. The proof container
> could include an optional nLockTime which defaults to 0 and nSequence which
> defaults to 0xFFFF...
Good point!
>> I think it would just use the default (SIGHASH_ALL?) for simplicity.
>> Is there a good reason to tweak it?
>
> I took another look and there should definitely be a byte appended to the
> end of the sig so that the encoding checks pass, but I think it might as
> well be a 0x00 byte since it's not actually a sighash flag.
I think the sighash flag affects the outcome of the actual
verification, but I could be mistaken.
-Kalle.
next prev parent reply other threads:[~2018-03-16 0:38 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-14 8:09 Karl Johan Alm
2018-03-14 9:46 ` Kalle Rosenbaum
2018-03-14 16:12 ` Anthony Towns
2018-03-15 3:01 ` Karl Johan Alm
2018-03-15 6:43 ` Jim Posen
2018-03-15 7:25 ` Karl Johan Alm
2018-03-15 20:53 ` Jim Posen
2018-03-14 12:36 ` Luke Dashjr
2018-03-15 7:36 ` Karl Johan Alm
2018-03-15 14:14 ` Luke Dashjr
2018-03-16 0:38 ` Karl Johan Alm [this message]
2018-03-16 1:59 ` Greg Sanders
2018-03-16 2:04 ` Karl Johan Alm
2018-03-15 10:15 ` Damian Williamson
2018-03-26 8:53 ` Pieter Wuille
2018-03-27 8:09 ` Karl Johan Alm
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