From: Alan Reiner <etotheipi@gmail•com>
To: bitcoin-development@lists•sourceforge.net
Subject: Re: [Bitcoin-development] New BIP32 structure
Date: Wed, 26 Mar 2014 21:01:40 -0400 [thread overview]
Message-ID: <53337874.7010300@gmail.com> (raw)
In-Reply-To: <lgvobr$q44$1@ger.gmane.org>
[-- Attachment #1: Type: text/plain, Size: 4868 bytes --]
This might be tangential, but the comment about "refund" chains reminded
me. Armory will be implementing multi-sig/linked wallets where a each
device has a parallel HDW branch and produces P2SH addresses. For those
types of wallets, I plan to allocate two chains /per signing
authority/. If you have a shared 2-of-2 wallet split between your phone
and your spouse's phone, your phone would distribute addresses on P2SH
chain 0 and generate change addresses on P2SH chain 1. Your spouse's
phone would use chains 2 and 3.
So if you and your spouse switch to a new app that supports M-of-N
linked wallets, it should search for coin history along the first 2*N
chains.
-Alan
On 03/26/2014 07:37 PM, Andreas Schildbach wrote:
> Thanks for starting the discussion on finding a better structure.
>
> For me, the most important thing is either we're 100% interoperable or
> 0%. There should not be anything inbetween, as users will delete seeds
> without knowing there is still money in them on another implementation.
> I heard from multiple sources that using this standard some wallets will
> only see a subset of the addresses/keys of some other wallets.
> Implementation differences can always happen (and should addresses as
> bugs), but I think its unacceptable that this source of issues is by design.
>
> I suggest we agree on an even simpler least common denominator and
> wallets that want to implement some feature on top of that can do but
> are encouraged to pick a totally different "cointype". I guess that
> would mean removing reserved and account.
>
> I'm still thinking it might be a good idea to have a separate chain for
> "refunds". Refunds will be rarely used and thus need a much slower
> moving window than receiving addresses or change.
>
>
> On 03/26/2014 09:49 PM, Mike Hearn wrote:
>> Myself, Thomas V (Electrum) and Marek (Trezor) got together to make sure
>> our BIP32 wallet structures would be compatible - and I discovered that
>> only I was planning to use the default structure.
>>
>> Because I'm hopeful that we can get a lot of interoperability between
>> wallets with regards to importing 12-words paper wallets, we
>> brainstormed to find a structure acceptable to everyone and ended up with:
>>
>> /m/cointype/reserved'/account'/change/n
>>
>> The extra levels require some explanation:
>>
>> * cointype: This is zero for Bitcoin. This is here to support two
>> things, one is supporting alt coins based off the same root seed.
>> Right now nobody seemed very bothered about alt coins but sometimes
>> feature requests do come in for this. Arguably there is no need and
>> alt coins could just use the same keys as Bitcoin, but it may help
>> avoid confusion if they don't.
>>
>> More usefully, cointype can distinguish between keys intended for
>> things like multisig outputs, e.g. for watchdog services. This means
>> if your wallet does not know about the extra protocol layers
>> involved in this, it can still import the "raw" money and it will
>> just ignore/not see the keys used in more complex transactions.
>>
>> * reserved is for "other stuff". I actually don't recall why we ended
>> up with this. It may have been intended to split out multisig
>> outputs etc from cointype. Marek, Thomas?
>>
>> * account is for keeping essentially wallets-within-a-wallet to avoid
>> mixing of coins. If you want that.
>>
>> * change is 0 for receiving addresses, 1 for change addresses.
>>
>> * n is the actual key index
>>
>> For bitcoinj we're targeting a deliberately limited feature set for hdw
>> v1 so I would just set the first three values all to zero and that is a
>> perfectly fine way to be compatible.
>>
>> The goal here is that the same seed can be written down once, and meet
>> all the users needs, whilst still allowing some drift between what
>> wallets support.
>>
>> Pieter made the I think valid point that you can't really encode how
>> keys are meant to be used into just an HDW hierarchy and normally you'd
>> need some metadata as well. However, I feel interop between wallets is
>> more important than arriving at the most perfect possible arrangement,
>> which feels a little like bikeshedding, so I'm happy to just go with the
>> flow on this one.
>>
>>
>>
>> ------------------------------------------------------------------------------
>>
>>
>>
>> _______________________________________________
>> Bitcoin-development mailing list
>> Bitcoin-development@lists•sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/bitcoin-development
>>
>
>
> ------------------------------------------------------------------------------
> _______________________________________________
> Bitcoin-development mailing list
> Bitcoin-development@lists•sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/bitcoin-development
[-- Attachment #2: Type: text/html, Size: 5632 bytes --]
next prev parent reply other threads:[~2014-03-27 1:01 UTC|newest]
Thread overview: 100+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-26 20:49 Mike Hearn
2014-03-26 23:37 ` Andreas Schildbach
2014-03-27 1:01 ` Alan Reiner [this message]
2014-03-27 6:15 ` Mike Belshe
2014-03-27 10:57 ` Thomas Voegtlin
2014-03-27 11:39 ` Mike Hearn
2014-03-27 13:30 ` Thomas Voegtlin
2014-03-27 13:38 ` Mike Hearn
2014-03-27 1:13 ` Allen Piscitello
2014-03-27 5:34 ` Troy Benjegerdes
2014-03-27 7:09 ` Tamas Blummer
2014-03-27 9:42 ` Mike Hearn
2014-03-27 11:35 ` Pavol Rusnak
2014-03-27 15:43 ` Jeff Garzik
2014-03-27 15:57 ` Allen Piscitello
2014-03-27 16:06 ` Pavol Rusnak
2014-03-27 16:13 ` Allen Piscitello
2014-03-27 16:07 ` Tamas Blummer
2014-03-27 16:14 ` Pieter Wuille
2014-03-27 16:21 ` Pavol Rusnak
2014-03-27 16:28 ` Pieter Wuille
2014-03-27 17:49 ` Allen Piscitello
2014-03-28 14:59 ` slush
2014-04-08 12:43 ` slush
2014-04-08 13:18 ` Pieter Wuille
2014-04-08 13:40 ` slush
2014-04-08 13:43 ` slush
2014-04-08 13:53 ` Pieter Wuille
2014-04-08 13:59 ` Thomas Voegtlin
2014-04-08 14:00 ` Tamas Blummer
2014-04-08 14:35 ` Pavol Rusnak
2014-04-08 15:41 ` slush
2014-04-23 17:42 ` Pieter Wuille
2014-04-23 18:01 ` slush
2014-04-23 18:18 ` slush
2014-04-23 18:39 ` Tier Nolan
2014-04-23 18:46 ` Pavol Rusnak
2014-04-23 19:00 ` Tier Nolan
2014-04-23 19:06 ` slush
2014-04-23 19:36 ` Tamas Blummer
2014-04-23 19:46 ` slush
2014-04-23 19:07 ` Tamas Blummer
2014-04-23 19:29 ` Pavol Rusnak
2014-04-23 19:44 ` Luke-Jr
2014-04-23 19:49 ` Pavol Rusnak
2014-04-23 19:55 ` Luke-Jr
2014-04-23 19:57 ` slush
2014-04-23 20:01 ` Luke-Jr
2014-04-23 20:04 ` Pavol Rusnak
2014-04-23 20:09 ` Luke-Jr
2014-04-23 20:16 ` Pavol Rusnak
2014-04-23 20:32 ` Luke-Jr
2014-04-23 20:35 ` Pavol Rusnak
2014-04-23 20:41 ` Luke-Jr
2014-04-23 20:43 ` Pavol Rusnak
2014-04-23 20:54 ` Pieter Wuille
2014-04-23 21:06 ` Pavol Rusnak
2014-04-23 21:18 ` Luke-Jr
2014-04-23 21:22 ` Gregory Maxwell
2014-04-23 21:33 ` Pavol Rusnak
2014-04-23 21:42 ` Pieter Wuille
2014-04-23 21:44 ` Pavol Rusnak
2014-04-23 21:48 ` Gregory Maxwell
2014-04-23 21:53 ` Luke-Jr
2014-04-23 21:24 ` Pavol Rusnak
2014-04-23 21:07 ` slush
2014-04-23 20:59 ` Luke-Jr
2014-04-23 20:17 ` Tamas Blummer
2014-04-23 20:12 ` Pieter Wuille
2014-04-23 20:08 ` Pieter Wuille
2014-04-23 20:01 ` Tamas Blummer
2014-04-23 20:02 ` Luke-Jr
2014-04-23 20:04 ` Tamas Blummer
2014-04-24 6:54 ` Thomas Voegtlin
2014-04-24 7:10 ` Pieter Wuille
2014-04-24 7:21 ` Gregory Maxwell
2014-04-24 8:15 ` Thomas Voegtlin
2014-04-24 7:42 ` Thomas Voegtlin
2014-04-24 8:09 ` Mike Hearn
2014-04-23 18:48 ` Tamas Blummer
2014-04-08 14:49 ` Andreas Schildbach
2014-04-08 15:46 ` slush
2014-04-08 15:58 ` Andreas Schildbach
2014-04-08 16:24 ` slush
2014-03-27 11:20 ` Thomas Voegtlin
[not found] ` <CAJna-HhmFya+3W67qQt0wMhW=B4vJvwdkr-5WnU+KEaKq7uaUA@mail.gmail.com>
2014-03-27 12:06 ` Thomas Voegtlin
2014-03-27 12:28 ` Mike Hearn
2014-03-27 12:49 ` Mike Hearn
2014-03-27 13:12 ` Thomas Kerin
2014-03-27 13:19 ` Mike Hearn
2014-03-27 13:49 ` Thomas Voegtlin
2014-03-27 13:58 ` Jim
2014-03-27 14:20 ` Mike Hearn
2014-03-27 15:17 ` Troy Benjegerdes
2014-03-27 13:07 ` Matias Alejo Garcia
2014-03-27 13:44 ` Pavol Rusnak
2014-03-27 13:53 ` Thomas Voegtlin
2014-03-27 14:03 ` Pavol Rusnak
[not found] ` <CAJna-HitjJbL9TnfxTY=+TvfaeNvZM6aPWmNYmHUCwmw6V8PUg@mail.gmail.com>
2014-03-27 15:04 ` Thomas Voegtlin
2014-03-27 11:36 ` Pavol Rusnak
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=53337874.7010300@gmail.com \
--to=etotheipi@gmail$(echo .)com \
--cc=bitcoin-development@lists$(echo .)sourceforge.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox