From: Jonas Schnelli <dev@jonasschnelli•ch>
To: Pavol Rusnak <stick@satoshilabs•com>,
Bitcoin Protocol Discussion
<bitcoin-dev@lists•linuxfoundation.org>
Subject: Re: [bitcoin-dev] Proposal: Extended serialization format for BIP-32 wallets
Date: Thu, 7 Sep 2017 09:47:16 -0700 [thread overview]
Message-ID: <A806D2EB-744F-41A9-91C1-603F89E9005B@jonasschnelli.ch> (raw)
In-Reply-To: <0d405f5d-c0a4-bad7-b6c3-08ba4424bf17@satoshilabs.com>
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Thanks for the proposal.
Three points it could see as possible improvements:
1.
From what I know, the exact birthday in seconds doesn’t matter that much therefore it may be possible to just use 13 or 16bits to create a representation in week from 2009-01-09 00:00 UTC. 13bits would give you 157 years.
Always round down to the beginning of the week when the key was created.
But not sure if it’s worth to save ~two bytes for that.
Also not sure if the key-birthday in seconds could have a security or privacy implication (week maybe better).
2.
Would it make sense to have special depth bytes that directly implies it’s a BIP44 master key (and therefore avoid the bip32 path serialisation)? I know some „centralised“ table need to be available for that which may be not a good idea. But maybe the BIP could reserve a couple of depth-bytes (maybe 0xF0 to 0xFF) for predefined paths.
3.
Would adding a version bit make sense to allow future extensions?
/jonas
> Am 06.09.2017 um 15:29 schrieb Pavol Rusnak via bitcoin-dev <bitcoin-dev@lists•linuxfoundation.org>:
>
> The discussion about changing bip32 version bytes for SegWit got me
> thinking and I ended up with what I think is the best proposal:
>
> https://github.com/satoshilabs/slips/blob/master/slip-0032.md
>
> (It is hosted in SL repo for now, but if there is will, I would love to
> have this added to BIP repo as an extension to BIP32)
>
> Feel free to comment.
>
> --
> Best Regards / S pozdravom,
>
> Pavol "stick" Rusnak
> CTO, SatoshiLabs
> _______________________________________________
> bitcoin-dev mailing list
> bitcoin-dev@lists•linuxfoundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
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next prev parent reply other threads:[~2017-09-07 16:47 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-06 22:29 Pavol Rusnak
2017-09-07 3:52 ` Kabuto Samourai
2017-09-07 16:25 ` Pavol Rusnak
2017-09-07 16:30 ` Kabuto Samourai
2017-09-07 16:37 ` Pavol Rusnak
2017-09-07 18:02 ` Peter Todd
2017-09-07 4:29 ` Thomas Voegtlin
2017-09-07 16:23 ` Pavol Rusnak
2017-09-07 16:33 ` Kabuto Samourai
2017-09-07 19:35 ` Andreas Schildbach
2017-09-07 20:00 ` Pavol Rusnak
2017-09-07 20:39 ` Thomas Voegtlin
2017-09-07 16:47 ` Jonas Schnelli [this message]
2017-09-07 18:09 ` Peter Todd
2017-09-07 18:38 ` Pavol Rusnak
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