From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sog-mx-3.v43.ch3.sourceforge.com ([172.29.43.193] helo=mx.sourceforge.net) by sfs-ml-3.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1Wd2D9-0005kk-HS for bitcoin-development@lists.sourceforge.net; Wed, 23 Apr 2014 18:47:59 +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 1Wd2D6-0006fZ-7O for bitcoin-development@lists.sourceforge.net; Wed, 23 Apr 2014 18:47:59 +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 1Wd2Cz-0004ay-DZ; Wed, 23 Apr 2014 20:47:49 +0200 Content-Type: multipart/signed; boundary="Apple-Mail=_B62AA0B9-CC9E-4567-A040-33B41D789DAB"; protocol="application/pgp-signature"; micalg=pgp-sha1 Mime-Version: 1.0 (Mac OS X Mail 7.2 \(1874\)) From: Tamas Blummer In-Reply-To: Date: Wed, 23 Apr 2014 20:48:22 +0200 Message-Id: <4D1F31F6-8EF3-443F-94F2-76DA4408D6CD@bitsofproof.com> References: <53344FF8.7030204@gk2.sk> To: Tier Nolan X-Mailer: Apple Mail (2.1874) X-bounce-key: webpack.hosteurope.de; tamas@bitsofproof.com; 1398278876; a5590a1c; 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: 1Wd2D6-0006fZ-7O Cc: Bitcoin Dev Subject: Re: [Bitcoin-development] New BIP32 structure 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, 23 Apr 2014 18:47:59 -0000 --Apple-Mail=_B62AA0B9-CC9E-4567-A040-33B41D789DAB Content-Type: multipart/alternative; boundary="Apple-Mail=_8F10DCD6-F7DD-4D59-A417-B2F27397888F" --Apple-Mail=_8F10DCD6-F7DD-4D59-A417-B2F27397888F Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii The most useful meta data to optimize chain scan is the key birth date, = then the allowed gap size.=20 Tamas Blummer http://bitsofproof.com On 23.04.2014, at 20:39, Tier Nolan wrote: > Different users could have different gap limit requirements. 20 seems = very low as the default. >=20 > A merchant could easily send 20 addresses in a row to customers and = none of them bother to actually buy anything. >=20 > Setting the gap limit to high is just a small extra cost in that case. >=20 > Bip-32 serialization doesn't have a way of adding meta data though. >=20 >=20 --Apple-Mail=_8F10DCD6-F7DD-4D59-A417-B2F27397888F Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii The = most useful meta data to optimize chain scan is the key birth date, then = the allowed gap size. 


On 23.04.2014, at 20:39, Tier Nolan <tier.nolan@gmail.com> = wrote:

Different users could have different = gap limit requirements.  20 seems very low as the default.

A = merchant could easily send 20 addresses in a row to customers and none = of them bother to actually buy anything.

Setting the gap limit to high is just a small extra cost = in that case.

Bip-32 serialization doesn't have = a way of adding meta data though.



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