To: bitcoin-dev@lists.linuxfoundation.org
References: <8088fa79-8e77-8663-afb4-800a405a6182@chainside.net>
	<201708292007.44679.luke@dashjr.org>
From: Simone Bronzini <simone.bronzini@chainside.net>
Message-ID: <a4ced861-ab3b-10a5-ba4a-d698d1ca8471@chainside.net>
Date: Wed, 30 Aug 2017 14:22:30 +0200
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Subject: Re: [bitcoin-dev] BIP proposal for Lightning-oriented multiaccount
 multisig HD wallets
Precedence: list

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From: Simone Bronzini <simone.bronzini@chainside.net>
To: bitcoin-dev@lists.linuxfoundation.org
Message-ID: <a4ced861-ab3b-10a5-ba4a-d698d1ca8471@chainside.net>
Subject: Re: [bitcoin-dev] BIP proposal for Lightning-oriented multiaccount
 multisig HD wallets
References: <8088fa79-8e77-8663-afb4-800a405a6182@chainside.net>
 <201708292007.44679.luke@dashjr.org>
In-Reply-To: <201708292007.44679.luke@dashjr.org>

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Thanks for your feedback, I fixed what you suggested. As for the purpose
how should we move on? We would be inclined to use 46, but of course we
are open to any other number.


On 29/08/17 22:07, Luke Dashjr via bitcoin-dev wrote:
>> Status: Proposed
> This should only be set after peer review and implementations are compl=
ete,=20
> and you intend that there will be no further changes.
>
>> As registered coin types we propose the ones already used for BIP44, w=
hich=20
> can be found at the following page.
>
> I suggest just referring to SLIP 44 directly.
>
> You're missing the Backward Compatibility and Copyright sections.
>
>
>
> On Tuesday 29 August 2017 10:19:10 AM Simone Bronzini via bitcoin-dev w=
rote:
>> Hi all,
>> last month we started looking for feedback (here and on other channels=
)
>> about a proposal for a new structure to facilitate the management of
>> different multisig accounts under the same master key, avoiding key
>> reuse but still allowing cosigners to independently generate new
>> addresses. While previously multiaccount multisig wallets were little
>> used, now that LN is becoming a reality it is extremely important to
>> have a better multiaccount management method to handle multiple paymen=
t
>> channels.
>> Please have a look at the draft of the BIP at the link below:
>>
>> https://github.com/chainside/BIP-proposal/blob/master/BIP.mediawiki
>>
>> Any feedback is highly appreciated, but in particular we would like to=

>> collect opinions about the following issues:
>>
>> 1. coin_type level:
>> this level is intended to allow users to manage multiple
>> cryptocurrencies or forks of Bitcoin using the same masterkey (similar=
ly
>> to BIP44). We have already received some legit objections that, since =
we
>> are talking about a Bitcoin Improvement Proposal,  it shouldn't care
>> about alt-coins. While we can agree with such objections, we also
>> believe that having a coin_type level improves interoperability with
>> muti-currency wallets (which is good), without any major drawback.
>> Moreover, even a Bitcoin maximalist may hold multiple coins for whatev=
er
>> reason (short term speculation, testing, etc).
>>
>> 2. SegWit addresses:
>> since mixing SegWit and non-SegWit addresses on the same BIP44 structu=
re
>> could lead to UTXOs not being completely recognised by old wallets,
>> BIP49 was proposed to separate the key space. Since this is a new
>> proposal, we can assume that wallets implementing it would be
>> SegWit-compatible and so there should be no need to differetiate betwe=
en
>> SegWit and non-SegWit pubkeys. Anyway, if someone believes this proble=
m
>> still holds, we thought about two possible solutions:
>>     a. Create separate purposes for SegWit and non SegWit addresses
>> (this would keep the same standard as BIP44 and BIP49)
>>     b. Create a new level on this proposed structure to divide SegWit
>> and non SegWit addresses: we would suggest to add this new level betwe=
en
>> cosigner_index and change
>>
>> We believe solution b. would be better as it would give the option of
>> having a multisig wallet with non SegWit-aware cosigners without havin=
g
>> to use two different subtrees.
>>
>> This proposal is a work in progess so we would like to receive some
>> feedback before moving on with proposing it as a BIP draft.
>>
>> Simone Bronzini
> _______________________________________________
> bitcoin-dev mailing list
> bitcoin-dev@lists.linuxfoundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev


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Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/

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