In BIP45 it mentions "lexicographically sorting the public keys".
https://github.com/bitcoin/bips/blob/master/bip-0045.mediawiki#Address_Generation_Procedure
On 15 January 2015 at 03:32, Jeff Garzik wrote:
> Sounds like this warrants a micro-BIP just to get everybody on the same
> page.
>
>
> On Wed, Jan 14, 2015 at 11:37 AM, Ruben de Vries
> wrote:
>
>> For p2sh multisig TXs the order of the public keys affect the hash and
>> there doesn't seem to be an agreed upon way of sorting the public keys.
>>
>> If there would be a standard (recommended) way of sorting the public keys
>> that would make it easier for services that implement some form of multisig
>> to be compatible with each other without much hassle and making it possible
>> to import keys from one service to another.
>>
>> I'm not suggesting forcing the order, just setting a standard to
>> recommend, there doesn't seem to be much reason for (new) services to not
>> follow that recommendation.
>>
>> Ryan from BitPay broad this up before (
>> https://sourceforge.net/p/bitcoin/mailman/message/32092958/) and in
>> bitcore they've implemented lexicographical sorting on the hex of the
>> public key.
>> In a short search I can't find any other library that has a sorting
>> function, let alone using it by default, so bitcore is currently my only
>> reference.
>>
>>
>> Ruben de Vries
>> CTO, BlockTrail
>>
>>
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>
>
> --
> Jeff Garzik
> Bitcoin core developer and open source evangelist
> BitPay, Inc. https://bitpay.com/
>
>
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