From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sog-mx-1.v43.ch3.sourceforge.com ([172.29.43.191] helo=mx.sourceforge.net) by sfs-ml-2.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1YMPtj-000719-2w for bitcoin-development@lists.sourceforge.net; Fri, 13 Feb 2015 23:43:47 +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-1.v43.ch3.sourceforge.com with esmtps (TLSv1:AES256-SHA:256) (Exim 4.76) id 1YMPtY-0005Hc-Q7 for bitcoin-development@lists.sourceforge.net; Fri, 13 Feb 2015 23:43:47 +0000 Received: from [192.168.0.222] (unknown [89.100.72.184]) (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 BA7A99BA084E; Fri, 13 Feb 2015 23:43:28 +0000 (UTC) Message-ID: <54DE8C1C.60804@thomaskerin.io> Date: Fri, 13 Feb 2015 23:43:24 +0000 From: Thomas Kerin User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0 MIME-Version: 1.0 To: Luke Dashjr , pete@petertodd.org, bitcoin-development@lists.sourceforge.net References: <54DD1E3F.60006@thomaskerin.io> <201502122213.34765.luke@dashjr.org> In-Reply-To: <201502122213.34765.luke@dashjr.org> OpenPGP: url=http://pgp.mit.edu/pks/lookup?op=get&search=0x3F0D2F83A2966155 Content-Type: multipart/mixed; boundary="------------020407070500010207030500" X-Spam-Score: 0.8 (/) 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 -0.2 AWL AWL: Adjusted score from AWL reputation of From: address X-Headers-End: 1YMPtY-0005Hc-Q7 Cc: ruben@blocktrail.com Subject: Re: [Bitcoin-development] BIP for deterministic pay-to-script-hash multi-signature addresses 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, 13 Feb 2015 23:43:47 -0000 This is a multi-part message in MIME format. --------------020407070500010207030500 Content-Type: multipart/alternative; boundary="------------010300000806080507060602" --------------010300000806080507060602 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On 12/02/15 22:13, Luke Dashjr wrote: > Where is the Specification section?? Does this support arbitrary script= s, or=20 > only the simplest CHECKMULTISIG case? The BIP is a process for deriving only the type of scripts you would encounter doing addmultisigaddress. More complicated scripts would require more metadata to be shared, but the only case we describe is when given public keys and the number of signatures required. You're right, we're missing a Specification. I have tweaked the document to cover this now. On 13/02/15 07:53, Peter Todd wrote: > It might be enough to rewrite this BIP to basically say "all pubkeys > executed by all CHECKMULTISIG opcodes will be in the following > canonical order", followed by some explanatory examples of how to > apply this simple rule. OTOH we don't yet have a standard way of even > talking about arbitrary scripts, so it may very well turn out to be > the case that the above rule is too restrictive in many cases - I > certainly would not want to do a soft-fork to enforce this, or even > make it an IsStandard() rule. It would be interesting, but I agree it should not be brought into these validation rules - just a convention for people to follow for now. I think it's fair that implementers are free to order them however they please. But I think there is good reason for wallets to opt in to the convention and declare this, for ease of recovery, and for interoperability reasons.=20 --=20 Thomas Kerin ------------------------------------------------------------------------ My PGP key can be found here --------------010300000806080507060602 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
On 12/02/15 22:13, Luke Dashjr wrote:<= br> 
Where is the Specification section?? Does this suppo=
rt arbitrary scripts, or=20
only the simplest CHECKMULTISIG case?

The BIP is a process for deriving only the type of scripts you would encounter doing addmultisigaddress. More complicated scripts would require more metadata to be shared, but the only case we describe is when given public keys and the number of signatures required.

You're right, we're missing a Specification. I have tweaked the document to cover this now.



On 13/02/15 07:53, Peter Todd wrote:
It might be enough to rewrite this BIP to basically say "all pubkeys executed by all CHECKMULTISIG opcodes will be in the following canonical order", followed by some explanatory examples of how to apply this simple rule. OTOH we don't yet have a standard way of even talking about arbitrary scripts, so it may very well turn out to be the case that the above rule is too restrictive in many cases - I certainly would not want to do a soft-fork to enforce this, or even make it an IsStandard() rule.

It would be interesting, but I agree it should not be brought into these validation rules - just a convention for people to follow for now. I think it's fair that implementers are free to order them however they please. But I think there is good reason for wallets to opt in to the convention and declare this, for ease of recovery, and for interoperability reasons.=C2=A0


--
Thomas Kerin 
My PGP key can be found here
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