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Date: Sun, 18 Aug 2013 19:11:09 -0400
From: Peter Todd <pete@petertodd.org>
To: Gavin Andresen <gavinandresen@gmail.com>
Message-ID: <20130818231109.GB23974@savin>
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Cc: Bitcoin Dev <bitcoin-development@lists.sourceforge.net>
Subject: Re: [Bitcoin-development] NODE_BLOOM BIP
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On Mon, Aug 19, 2013 at 08:22:10AM +1000, Gavin Andresen wrote:
> Mike pointed out exactly the reason I oppose a NODE_BLOOM service bit: I
> also think it is a bad idea to start making various bits and pieces of the
> protocol optional.

> It is bad for privacy (easier to fingerprint nodes) and bad for
> decentralization (fewer nodes support your required feature set). And eve=
ry
> bit you add can give you an exponential number of combinations your QA te=
am
> should test.

Mike's and others have been talking about persistent node-specific
identifiers, and after all at this level there are IP addresses;
fingerprinting nodes is trivial.

> I'd say the same thing about NODE_TRANSACTION ("I don't know about blocks,
> have and NODE_BLOCK bits.

We need options so peopl can contribute to relaying and the health of
the network - these edge cases are going to be tested anyway by people
like me deciding to disable bloom filtering.

--=20
'peter'[:-1]@petertodd.org

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