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From: Tamas Blummer <tamas@bitsofproof.com>
In-Reply-To: <CAE-z3OVCL34FMECHDC3d8OiRKYhVSkzZFU0cGHV0ifu09bCbJA@mail.gmail.com>
Date: Wed, 23 Apr 2014 20:48:22 +0200
Message-Id: <4D1F31F6-8EF3-443F-94F2-76DA4408D6CD@bitsofproof.com>
References: <CANEZrP2hbBVGqytmXR1rAcVama4ONnR586Se-Ch=dsxOzy2O4w@mail.gmail.com>
	<F2C8C044-EF92-4CCE-9235-28CA7FCE3526@bitsofproof.com>
	<CAJHLa0PPAsBLgsy0vgPpUp=UzeR_fWUEzFb5+xtmODEk4MGPVQ@mail.gmail.com>
	<CAJfRnm7V6fgcj=TMfa2ZTYWOKtE5aoUT1xnVtKUSyriB=6cagQ@mail.gmail.com>
	<CAPg+sBjwf1TcK1CGKVKFzYbV-78j8t-pav7=PEgG7Yqi6-yE7A@mail.gmail.com>
	<53344FF8.7030204@gk2.sk>
	<CAPg+sBhbx5vy_hewAkFPaiXHzSMNH0qLhEYGjPmQMjR5StP-tw@mail.gmail.com>
	<CAJna-Hi0JnrF2_rUx0rGkdnsuCoaD01e3Gobpn+QqbL=D1Uivg@mail.gmail.com>
	<CAJna-HirtsGLfAhfUf9dAYEGWo6g=o=eAU187c2pdW8vDFGkPw@mail.gmail.com>
	<CAPg+sBg8wDH9yTUoyhRbuzVtbD8hGxya8tOnV4pMToHy3gLrzw@mail.gmail.com>
	<CAJna-HiN_1KQmpDJFFX6mGvM63RC0xwXxvfuorpihnzYf4=fsQ@mail.gmail.com>
	<CAJna-HgfpyHX_0AHwt1Hkj0qhD_-xOcpxsZ9KXq=7CPgwse1hA@mail.gmail.com>
	<CAPg+sBguSQ8dk1xXKinX+ez4BmdM3sz-huruuhD6NCTsp0kRBQ@mail.gmail.com>
	<CAJna-Hib6umrkG0pAQzQvsyBMxOU6P675TURsVuWSU_ci9+X_A@mail.gmail.com>
	<CAPg+sBiwzfXDAM0FKsBPi8d6E5y_nK5FDyfPvPhOTAA+f8654Q@mail.gmail.com>
	<CAJna-HhPm0U2odPgRji7zJqCZCWuXKT_=ayC2tsajjRX5TiCXg@mail.gmail.com>
	<CAJna-Hh2t-E=fm9V0EH+qOQTx+qsmcBemEJmML0G9PgsrJr5eg@mail.gmail.com>
	<CAE-z3OVCL34FMECHDC3d8OiRKYhVSkzZFU0cGHV0ifu09bCbJA@mail.gmail.com>
To: Tier Nolan <tier.nolan@gmail.com>
Cc: Bitcoin Dev <bitcoin-development@lists.sourceforge.net>
Subject: Re: [Bitcoin-development] New BIP32 structure
Precedence: list


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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 <tier.nolan@gmail.com> 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


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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dus-ascii"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">The =
most useful meta data to optimize chain scan is the key birth date, then =
the allowed gap size.&nbsp;<div><br></div><div><div =
apple-content-edited=3D"true"><span style=3D"color: rgb(0, 0, 0); =
font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant: normal; font-weight: normal; letter-spacing: normal; =
line-height: normal; text-align: -webkit-auto; text-indent: 0px; =
text-transform: none; white-space: normal; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; orphans: 2; widows: 2; float: none; =
display: inline !important;">Tamas Blummer</span><span style=3D"color: =
rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><br =
style=3D"color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; text-align: -webkit-auto; =
text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; orphans: 2; widows: =
2;"><span style=3D"color: rgb(0, 0, 0); font-family: Helvetica; =
font-size: 12px; font-style: normal; font-variant: normal; font-weight: =
normal; letter-spacing: normal; line-height: normal; text-align: =
-webkit-auto; text-indent: 0px; text-transform: none; white-space: =
normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; orphans: 2; =
widows: 2; float: none; display: inline !important;"><a =
href=3D"http://bitsofproof.com">http://bitsofproof.com</a></span>
</span></div>
<br><div><div>On 23.04.2014, at 20:39, Tier Nolan &lt;<a =
href=3D"mailto:tier.nolan@gmail.com">tier.nolan@gmail.com</a>&gt; =
wrote:</div><br class=3D"Apple-interchange-newline"><blockquote =
type=3D"cite"><div dir=3D"ltr"><div>Different users could have different =
gap limit requirements.&nbsp; 20 seems very low as the default.<br><br>A =
merchant could easily send 20 addresses in a row to customers and none =
of them bother to actually buy anything.<br>
<br></div><div>Setting the gap limit to high is just a small extra cost =
in that case.<br></div><div><br></div>Bip-32 serialization doesn't have =
a way of adding meta data though.</div><div =
class=3D"gmail_extra"><br><br></div></blockquote></div><br></div></body></=
html>=

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