📅 Original date posted:2015-02-03
📝 Original message:Why even bother with the specific HD scheme such as BIP32 or BIP44. What
are the interesting parameters?
Required:
- gap limit
Optional:
- which node of the derivation chain is actually exported (m0' for
BIP32, m44'0'account' for BIP44)
- which subnodes are used for external and internal purposes
- creation date
To import the data in a read only application it is not important which
node one actually gets and in all implementations the subnode of the
exported node "0" is used for external addresses and "1" for internal
addresses.
There is no usecase to export any higher node than m0' in BIP32 or
m44'0'account' as one can only derive any child nodes of the higher nodes *with
the private master key*. As for lower nodes (like further down the path)
there is also no need to export because in all implementations today they
will only give around half of the used addresses.
So I think a more general but very useful export scheme would be:
bitcoin-pub-export:xpub[gibberish]?gaplimit=[number]&path=[path in
derivation tree]&subchains=[numbers]&creationdate=[unixtimestamp]
Why not have more descriptive parameters? Saving on data?
I am a big fan of unix timestamps. Would vote for Andreas' format on the
creation date.
Cheers
Levin
2015-02-03 1:22 GMT+01:00 Pavol Rusnak <stick at gk2.sk>:
> On 03/02/15 01:05, Andreas Schildbach wrote:
> > I don't think that parameterizing will work, we can't predict future
> > BIPs. It's the same as for BIP43, in the end we agreed on just putting
> > the BIP number.
>
> Hm, let me put the questions the other way around:
>
> What gap limit should a wallet use if it encounters h=bip32?
>
> What h value should I use for myTREZOR wallets? Which is essentially a
> BIP44 wallet that produces h=bip32 xpubs with gap limit 20 ...
>
> --
> Best Regards / S pozdravom,
>
> Pavol Rusnak <stick at gk2.sk>
>
>
> ------------------------------------------------------------------------------
> Dive into the World of Parallel Programming. The Go Parallel Website,
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> your
> hub for all things parallel software development, from weekly thought
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Levin Keller [ARCHIVE] /
npub153…ucv4s
2023-06-07 15:29:26
in reply to nevent1q…myuf
Author Public Key
npub153djqudvkf75u2f2u4ya8ty0yncq8cjlp3g5txgxgcegug3k7kustucv4sPublished at
2023-06-07 15:29:26Event JSON
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"id": "e6e682c92fdb6aa04ec344609d78836051a57ecad1d5086393a95f795115ac64",
"pubkey": "a45b2071acb27d4e292ae549d3ac8f24f003e25f0c5145990646328e2236f5b9",
"created_at": 1686151766,
"kind": 1,
"tags": [
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"content": "📅 Original date posted:2015-02-03\n📝 Original message:Why even bother with the specific HD scheme such as BIP32 or BIP44. What\nare the interesting parameters?\n\nRequired:\n\n - gap limit\n\nOptional:\n\n - which node of the derivation chain is actually exported (m0' for\n BIP32, m44'0'account' for BIP44)\n - which subnodes are used for external and internal purposes\n - creation date\n\nTo import the data in a read only application it is not important which\nnode one actually gets and in all implementations the subnode of the\nexported node \"0\" is used for external addresses and \"1\" for internal\naddresses.\n\nThere is no usecase to export any higher node than m0' in BIP32 or\nm44'0'account' as one can only derive any child nodes of the higher nodes *with\nthe private master key*. As for lower nodes (like further down the path)\nthere is also no need to export because in all implementations today they\nwill only give around half of the used addresses.\n\nSo I think a more general but very useful export scheme would be:\n\nbitcoin-pub-export:xpub[gibberish]?gaplimit=[number]\u0026path=[path in\nderivation tree]\u0026subchains=[numbers]\u0026creationdate=[unixtimestamp]\n\nWhy not have more descriptive parameters? Saving on data?\n\nI am a big fan of unix timestamps. Would vote for Andreas' format on the\ncreation date.\n\nCheers\n\nLevin\n\n2015-02-03 1:22 GMT+01:00 Pavol Rusnak \u003cstick at gk2.sk\u003e:\n\n\u003e On 03/02/15 01:05, Andreas Schildbach wrote:\n\u003e \u003e I don't think that parameterizing will work, we can't predict future\n\u003e \u003e BIPs. It's the same as for BIP43, in the end we agreed on just putting\n\u003e \u003e the BIP number.\n\u003e\n\u003e Hm, let me put the questions the other way around:\n\u003e\n\u003e What gap limit should a wallet use if it encounters h=bip32?\n\u003e\n\u003e What h value should I use for myTREZOR wallets? Which is essentially a\n\u003e BIP44 wallet that produces h=bip32 xpubs with gap limit 20 ...\n\u003e\n\u003e --\n\u003e Best Regards / S pozdravom,\n\u003e\n\u003e Pavol Rusnak \u003cstick at gk2.sk\u003e\n\u003e\n\u003e\n\u003e ------------------------------------------------------------------------------\n\u003e Dive into the World of Parallel Programming. The Go Parallel Website,\n\u003e sponsored by Intel and developed in partnership with Slashdot Media, is\n\u003e your\n\u003e hub for all things parallel software development, from weekly thought\n\u003e leadership blogs to news, videos, case studies, tutorials and more. Take a\n\u003e look and join the conversation now. http://goparallel.sourceforge.net/\n\u003e _______________________________________________\n\u003e Bitcoin-development mailing list\n\u003e Bitcoin-development at lists.sourceforge.net\n\u003e https://lists.sourceforge.net/lists/listinfo/bitcoin-development\n\u003e\n-------------- next part --------------\nAn HTML attachment was scrubbed...\nURL: \u003chttp://lists.linuxfoundation.org/pipermail/bitcoin-dev/attachments/20150203/80057add/attachment.html\u003e",
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}