Received: from sog-mx-3.v43.ch3.sourceforge.com ([172.29.43.193] helo=mx.sourceforge.net) by sfs-ml-4.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1WXvLL-0007U3-Ul for bitcoin-development@lists.sourceforge.net; Wed, 09 Apr 2014 16:27:20 +0000 X-ACL-Warn: Received: from wp059.webpack.hosteurope.de ([80.237.132.66]) by sog-mx-3.v43.ch3.sourceforge.com with esmtps (TLSv1:AES256-SHA:256) (Exim 4.76) id 1WXvLK-00049O-B6 for bitcoin-development@lists.sourceforge.net; Wed, 09 Apr 2014 16:27:19 +0000 Received: from [37.143.74.116] (helo=[192.168.2.2]); authenticated by wp059.webpack.hosteurope.de running ExIM with esmtpsa (TLS1.0:RSA_AES_128_CBC_SHA1:16) id 1WXvLD-0008NL-S5; Wed, 09 Apr 2014 18:27:11 +0200 Content-Type: multipart/signed; boundary="Apple-Mail=_76B9A1C7-A658-4B61-9668-B5CF8D8714DC"; protocol="application/pgp-signature"; micalg=pgp-sha1 Mime-Version: 1.0 (Mac OS X Mail 7.2 \(1874\)) From: Tamas Blummer In-Reply-To: <53456B99.9010207@monetize.io> Date: Wed, 9 Apr 2014 18:27:13 +0200 Message-Id: References: <53456B99.9010207@monetize.io> To: Mark Friedenbach X-Mailer: Apple Mail (2.1874) X-bounce-key: webpack.hosteurope.de; tamas@bitsofproof.com; 1397060838; 909ec884; X-Spam-Score: 1.0 (+) X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. See http://spamassassin.org/tag/ for more details. 1.0 HTML_MESSAGE BODY: HTML included in message X-Headers-End: 1WXvLK-00049O-B6 Cc: bitcoin-development@lists.sourceforge.net Subject: Re: [Bitcoin-development] Bitcoind-in-background mode for SPV wallets X-BeenThere: bitcoin-development@lists.sourceforge.net X-Mailman-Version: 2.1.9 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 09 Apr 2014 16:27:20 -0000 --Apple-Mail=_76B9A1C7-A658-4B61-9668-B5CF8D8714DC Content-Type: multipart/alternative; boundary="Apple-Mail=_714D17C4-7D81-4C2C-9167-962E7F81F337" --Apple-Mail=_714D17C4-7D81-4C2C-9167-962E7F81F337 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii A border router that is not able to serve blocks is still protecting = consensus rules, that SPVs do not. If the network would only consist of SPV nodes only then e.g. a majority = coalition of miner could increase their reward at will. Archives need a different solution. Regards, Tamas Blummer http://bitsofproof.com On 09.04.2014, at 17:47, Mark Friedenbach wrote: > On 04/09/2014 09:09 AM, Tamas Blummer wrote: >> Yes, SPV is a sufficient API to a trusted node to build sophisticated >> features not offered by the core. >> SPV clients of the border router will build their own archive and >> indices based on their interest of the chain therefore the >> border router core does not need to store (and process) anything not >> needed for consensus, its memory >> or disk footprint would be as low as an optimal storage of UTXO. >=20 > Storing zero full blocks does nothing to aid the network. --Apple-Mail=_714D17C4-7D81-4C2C-9167-962E7F81F337 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii A = border router that is not able to serve blocks is still protecting = consensus rules, that SPVs do not.
If the network would only consist = of SPV nodes only then e.g. a majority coalition of miner could increase = their reward at will.

Archives need a different = solution.

Regards,

Tamas = Blummer
http://bitsofproof.com

On 09.04.2014, at 17:47, Mark Friedenbach <mark@monetize.io> = wrote:

On 04/09/2014 09:09 AM, Tamas Blummer = wrote:
Yes, SPV is a sufficient API to a = trusted node to build sophisticated
features not offered by the = core.
SPV clients of the border router will build their own archive = and
indices based on their interest of the chain therefore = the
border router core does not need to store (and process) anything = not
needed for consensus, its memory
or disk footprint would be as = low as an optimal storage of UTXO.

Storing zero full = blocks does nothing to aid the = network.

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