From: Peter Todd <pete@petertodd•org>
To: Jeffrey Paul <jp@eeqj•com>, Luke Dashjr <luke@dashjr•org>
Cc: Bitcoin Dev <bitcoin-development@lists•sourceforge.net>
Subject: Re: [Bitcoin-development] Serialised P2SH HD chains
Date: Thu, 04 Dec 2014 20:43:32 +0000 [thread overview]
Message-ID: <EDE19DB7-A029-47AB-8E34-B59F09B3320D@petertodd.org> (raw)
In-Reply-To: <F904F6F8-BA2E-4B86-8C6C-B34A88D384BD@eeqj.com>
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On 4 December 2014 20:02:17 GMT+00:00, Jeffrey Paul <jp@eeqj•com> wrote:
>
>> On 20141204, at 07:42, Luke Dashjr <luke@dashjr•org> wrote:
>>
>> Is anyone working on a serialisation format to convey P2SH HD chains?
>For
>> example, to give someone who wants to make recurring payments a
>single token
>> that can be used to generate many P2SH addresses paying to a multisig
>script.
>>
>> I'm thinking of something along the lines of a simple series of
>tokens, each
>> indicating either a HD chain or literal script content. For all HD
>chains in
>> the data, a child key would be generated based on the payment number,
>and all
>> tokens concatenated to form the P2SH serialised script. Eg, for a
>simple 2-
>> of-2, you would do something like this:
>> literal(OP_2) HDChain HDChain literal(OP_2 OP_CHECKMULTISIG)
>> Does this sufficiently cover all reasonable use cases?
>
>
>What is the use case for something like this? It’s my impression that
>a single token that can be used to obtain many P2SH addresses paying to
>a multisig script looks something like
>
>bitcoin:?r=https://payee.com/customer12345/recurring/paymentrequest/new
>
>As it’s impossible to actually transmit a tx without network access,
>why would it be necessary to, at payment time, not contact the payee
>and use the existing bip70 authenticated payment request protocol to
>find out exactly what multisig address they’d like paid at that moment?
It's quite common to run into situations where the payee is *not* online. Similarly requiring them to be online is a security risk and defeats many ways of authenticating payment addresses. This stuff isn't evident in trivial consumer<->merchant use-cases, but is very common in anything else. For instance, consider the case of moving funds from a hot wallet or cold, and vice-versa.
Luke-Jr: sounds like some of the ideas I've been playing around with for generalised stealth addresses, using a declarative template scheme to avoid specifying scriptPubKey formats too explicitly. (though obcs k-anon set issues)
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next prev parent reply other threads:[~2014-12-04 20:45 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-04 15:42 Luke Dashjr
2014-12-04 16:46 ` Gavin Andresen
2014-12-04 17:25 ` William Swanson
2014-12-04 18:04 ` Mike Hearn
2014-12-04 20:02 ` Jeffrey Paul
2014-12-04 20:43 ` Peter Todd [this message]
2014-12-04 21:10 ` Luke Dashjr
[not found] <mailman.473107.1417725057.2207.bitcoin-development@lists.sourceforge.net>
2014-12-04 20:40 ` Michael Perklin
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