From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sog-mx-2.v43.ch3.sourceforge.com ([172.29.43.192] helo=mx.sourceforge.net) by sfs-ml-3.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1YCA8A-0005nQ-Ps for bitcoin-development@lists.sourceforge.net; Fri, 16 Jan 2015 16:52:18 +0000 X-ACL-Warn: Received: from static.204.212.9.5.clients.your-server.de ([5.9.212.204] helo=thelaboratory.tk) by sog-mx-2.v43.ch3.sourceforge.com with esmtps (TLSv1:AES256-SHA:256) (Exim 4.76) id 1YCA7x-00031n-5e for bitcoin-development@lists.sourceforge.net; Fri, 16 Jan 2015 16:52:18 +0000 Received: from [192.168.0.222] (unknown [89.100.72.228]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: me@thomaskerin.io) by thelaboratory.tk (Postfix) with ESMTPSA id ABF6D9BA084E for ; Fri, 16 Jan 2015 16:34:29 +0000 (UTC) Message-ID: <54B93D89.5020005@thomaskerin.io> Date: Fri, 16 Jan 2015 16:34:17 +0000 From: Thomas Kerin User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.3.0 MIME-Version: 1.0 To: bitcoin-development@lists.sourceforge.net References: <6E575287-887C-4628-834C-282B67AFAA94@eeqj.com> <3382316.6TbFyFjyI6@crushinator> In-Reply-To: OpenPGP: url=http://pgp.mit.edu/pks/lookup?op=get&search=0x3F0D2F83A2966155 Content-Type: multipart/mixed; boundary="------------070702030507000308030902" X-Spam-Score: 1.0 (+) X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. See http://spamassassin.org/tag/ for more details. 1.0 HTML_MESSAGE BODY: HTML included in message X-Headers-End: 1YCA7x-00031n-5e Subject: Re: [Bitcoin-development] convention/standard for sorting public keys for p2sh multisig transactions X-BeenThere: bitcoin-development@lists.sourceforge.net X-Mailman-Version: 2.1.9 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 16 Jan 2015 16:52:18 -0000 This is a multi-part message in MIME format. --------------070702030507000308030902 Content-Type: multipart/alternative; boundary="------------050907090300000206030703" --------------050907090300000206030703 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 It would - it assumes you have the set of keys and are sorting before you derive and send funds to such a P2SH address. It seems there is scope for further narrowing down how a multisig scripthash address should be determined - what do people think of anticipating only compressed keys for scripts? It's possible to cause confusion if one put forward a compressed key at some time, and an uncompressed key at another. A different script hash would be produced even though there is no difference to the keys involved. The client will not search for this. Having spoken with Jean-Pierre and Ruben about this for quite some time now, there is 100% the need for a BIP outlining this. Everyone has had the idea at some point, and some of us already using it, but people shouldn't have to go digging in BIP45 for the two lines which mention it. All we need is a place to put the docs. I am building up a list of implementations which currently support sorting, and briefly describing a motivation for such a BIP. On 16/01/15 10:16, Ruben de Vries wrote: > Since we only need the sorting for creating the scriptPubKey, > wouldn't it make the most sense to sort it by the way it represented in that context? > > > On Thu, Jan 15, 2015 at 2:03 PM, Wladimir > wrote: > > On Thu, Jan 15, 2015 at 1:17 AM, Matt Whitlock > wrote: > > On Wednesday, 14 January 2015, at 3:53 pm, Eric Lombrozo wrote: > >> Internally, pubkeys are DER-encoded integers. > > > > I thought pubkeys were represented as raw integers (i.e., they're embedded in Script as a push operation whose payload is the raw bytes of the big-endian representation of the integer). As far as I know, DER encoding is only used for signatures. Am I mistaken? > > OP_CHECKSIG (and OP_CHECKSIGVERIFY) takes a DER-encoded pubkey and = a > DER-encoded signature on the stack. > > Possibly you're confused with OP_HASH160 OP_EQUALVERIFY a= s > used in outputs, which compares the 160-bit hash of the pubkey agai= nst > the given hash (usually taken from a bitcoin address). > > It doesn't help understanding to consider either as integers. They = are > binary blob objects with either a fixed format (DER) or a fixed siz= e > (hashes). > > Wladimir > > > > > -- > BlockTrail B.V. > Barbara Strozzilaan 201 > 1083HN Amsterdam > The Netherlands > > Phone:+31 (0)612227277 > E-mail:ruben@blocktrail.com > Web:www.blocktrail.com > > Github:www.github.com/rubensayshi > > BlockTrail B.V. Is registered with the Dutch Chamber of Commerce in Amsterdam with registration No.:60262060 and VAT No.:NL853833035B01 > > > -------------------------------------------------------------------------= ----- > New Year. New Location. New Benefits. New Data Center in Ashburn, VA. > GigeNET is offering a free month of service with a new server in Ashbur= n. > Choose from 2 high performing configs, both with 100TB of bandwidth. > Higher redundancy.Lower latency.Increased capacity.Completely compliant= =2E > http://p.sf.net/sfu/gigenet > > > _______________________________________________ > Bitcoin-development mailing list > Bitcoin-development@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/bitcoin-development - --=20 Thomas Kerin - ------------------------- My PGP key can be found here -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQJ8BAEBCgBmBQJUuT2EXxSAAAAAAC4AKGlzc3Vlci1mcHJAbm90YXRpb25zLm9w ZW5wZ3AuZmlmdGhob3JzZW1hbi5uZXQ2MzI1MzM4QjJGOTU5OEUzREMzQzc0MzAz RjBEMkY4M0EyOTY2MTU1AAoJED8NL4OilmFV4GgP/Rr955cDBA34e58lLdjXkqzi EYDH5QfsTdUQQVUvkK0OBq7RQwkbb7Kn5u6U8UD3hEhaWwQGhrQ/gOJrqM68glma YfYupugMesTTu4Fxm/AtNv4Cifr29EZB1gu9hBeZGT4FL863+0ShvWHdHvscOcmg 3SGv0De+1bd93j7p+9jyWh/sYpHEdi0lQBMkkCzSzhXPZzoHEglUmVYBRcmrjaag ycHuQfN5zjM0fJ18R6f7PCOOAhDi9+7xpikDArvHmKb4BZjOuMBTprN2Mzdg98Uz Rw4LRsLuht5VCnWHvC8+TUUEMUO8QOMrRxLYJSDVGcl0XYXT0EiRfnkqCr5ab8mm KqLcxpSLxrDGd4OiHwWB7oDsg9tWXwVmyQgFsTLsxaNkL8AFRG59mAhbK9j+0+1E Bd/pMx0VgGXpn1Urism5YlrR4FZ5USbYn9O0NxhUkQb550qvRtaAQNUVSJPEW0AG /2pQdFOOqkI1wI0g2L/ZcC+fwBqUok+5MyMTb4NuuvaMDpR7vOeeobIpYLjL0VVZ dNzfnlCQxGw/7QrFIbvnye8fNIMZZ9qtJx00bvXYizRyUhrF/FrRgwj2DhEjz6xM 3+CHKXNmb0qGg6jKgHvXQFic2DVo3IaNmZtVDBqyqCBKmC/A65rRws5uxIimUsIC k4af62ZBGpSAhJ4ajCIY =3DNi9V -----END PGP SIGNATURE----- --------------050907090300000206030703 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
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Hash: SHA512

It would - it assumes you have the set of keys and are sorting before you derive and send funds to such a P2SH address.

It seems there is scope for further narrowing down how a multisig scripthash address should be determined - what do people think of anticipating only compressed keys for scripts?

It's possible to cause confusion if one put forward a compressed key at some time, and an uncompressed key at another. A different script hash would be produced even though there is no difference to the keys involved. The client will not search for this.


Having spoken with Jean-Pierre and Ruben about this for quite some time now, there is 100% the need for a BIP outlining this. Everyone has had the idea at some point, and some of us already using it, but people shouldn't have to go digging in BIP45 for the two lines which mention it. All we need is a place to put the docs.

I am building up a list of implementations which currently support sorting, and briefly describing a motivation for such a BIP.


On 16/01/15 10:16, Ruben de Vries wrote:
> Since we only need the sorting for creating the scriptPubKey,
> wouldn't it make the most sense to sort it by the way it represented in that context?
>
>
> On Thu, Jan 15, 2015 at 2:03 PM, Wladimir <laanwj@gmail.com <mailto:laanwj@gmail.com>> wrote: >
>=A0=A0=A0=A0 On Thu, Jan 15, 2015 at 1:17 AM, Matt Whitlock <bip@mattwhitlock.name <mailto:bip@mattwhitlock.name&g= t;> wrote:
>=A0=A0=A0=A0 > On Wednesday, 14 January 2015, at 3:53 pm, Er= ic Lombrozo wrote:
>=A0=A0=A0=A0 >> Internally, pubkeys are DER-encoded integ= ers.
>=A0=A0=A0=A0 >
>=A0=A0=A0=A0 > I thought pubkeys were represented as raw int= egers (i.e., they're embedded in Script as a push operation whose payload is the raw bytes of the big-endian representation of the integer). As far as I know, DER encoding is only used for signatures. Am I mistaken?
>
>=A0=A0=A0=A0 OP_CHECKSIG (and OP_CHECKSIGVERIFY) takes a DER-en= coded pubkey and a
>=A0=A0=A0=A0 DER-encoded signature on the stack.
>
>=A0=A0=A0=A0 Possibly you're confused with OP_HASH160 <hash1= 60> OP_EQUALVERIFY as
>=A0=A0=A0=A0 used in outputs, which compares the 160-bit hash o= f the pubkey against
>=A0=A0=A0=A0 the given hash (usually taken from a bitcoin addre= ss).
>
>=A0=A0=A0=A0 It doesn't help understanding to consider either a= s integers. They are
>=A0=A0=A0=A0 binary blob objects with either a fixed format (DE= R) or a fixed size
>=A0=A0=A0=A0 (hashes).
>
>=A0=A0=A0=A0 Wladimir
>
>
>
>
> --
> BlockTrail B.V.
> Barbara Strozzilaan 201
> 1083HN Amsterdam
> The Netherlands
>
> Phone:+31 (0)612227277
> E-mail:ruben@blocktrail.com <mailto:ruben@blocktrail.com>
> Web:www.blocktrail.com
> <http://www.blocktrail.com/>
> Github:www.github.com/rubensayshi <http://www.github.com/rubensayshi>
>
> BlockTrail B.V. Is registered with the Dutch Chamber of Commerce in Amsterdam with registration No.:60262060 and VAT No.:NL853833035B01
>
>
> -------------------------------------------------------------------------= -----
> New Year. New Location. New Benefits. New Data Center in Ashburn, VA.
> GigeNET is offering a free month of service with a new server in Ashburn.
> Choose from 2 high performing configs, both with 100TB of bandwidth.
> Higher redundancy.Lower latency.Increased capacity.Completely compliant.
> http://p.sf.net/sfu/gigenet
>
>
> _______________________________________________
> Bitcoin-development mailing list
> Bitcoin-development@lists.sourceforge.n= et
> https://lists.sourceforge.net/l= ists/listinfo/bitcoin-development

- --
Thomas Kerin
- -------------------------

My PGP key can be found here <http://pgp.mit.edu/pks/look= up?op=3Dget&search=3D0x3F0D2F83A2966155>
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