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Message-ID: <54D09EB3.4080201@gk2.sk>
Date: Tue, 03 Feb 2015 11:10:59 +0100
From: Pavol Rusnak <stick@gk2.sk>
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To: Levin Keller <post@levinkeller.de>
References: <CAG86ZOxYh+=rny3sPHeJ0qs6R=5frLXERKmwhVECGHo7tkrz3w@mail.gmail.com> <CANEZrP3Tuw3mJLSuoOA4iOmg6u9sdh-E5NNm_FgdYs3Mx39znA@mail.gmail.com> <manr4t$c1a$1@ger.gmane.org> <54CF74A5.3050304@gk2.sk> <mao0u5$gbu$1@ger.gmane.org> <54CF9016.5070206@gk2.sk> <map3bi$pkf$2@ger.gmane.org> <54D014DB.50404@gk2.sk>
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Cc: bitcoin-development@lists.sourceforge.net,
Andreas Schildbach <andreas@schildbach.de>
Subject: Re: [Bitcoin-development] Export format for xpub
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On 03/02/15 10:33, Levin Keller wrote:
> bitcoin-pub-export:xpub[gibberish]?gaplimit=[number]&path=[path in
> derivation tree]&subchains=[numbers]&creationdate=[unixtimestamp]
I cannot come up with an usecase where "path" parameter would be needed.
FWIW childnumber and depth are already expressed in xpub itself.
I like the general idea of "subchains" parameter, but I would like to
further specify it:
a) parameter should contain values described as comma separated
list of values (such as 0,1,2,3,4)
b) consecutive values can be shortened via dash (0,1,2,3 == 0-3)
c) should we allow non-consecutive values (e.g. 0,1,3,8)?
I am not sure. If not the "subchains" param can contain just upper
bound of indexes to scan (e.g. "3")
d) a wallet uses just the first specified chain to generate receiving
addresses, uses the other chains just to add to the balance
OR should a wallet be able to generate receiving address for second,
third, etc. external chain? if yes, we should split "subchains" param
into "external" and "internal" params both containing a list of
numbers. this seems like an overkill to me and I am fine with using
just the first chain as the external one.
> Why not have more descriptive parameters? Saving on data?
Yes. The longer the string, the bigger the QR code.
> I am a big fan of unix timestamps. Would vote for Andreas' format on the
> creation date.
I am not against Unix timestamps, I just said I expected something else
there. Unix timestamps have a lot of advantages. Another option that
might make sense is the block number.
--
Best Regards / S pozdravom,
Pavol Rusnak <stick@gk2.sk>
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