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From: Matthew Mitchell <matthewmitchell@godofgod.co.uk>
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Date: Mon, 10 Sep 2012 16:25:25 +0100
References: <8819BE21-AB14-4407-8007-8D3DBD40444E@godofgod.co.uk>
To: "bitcoin-development@lists.sourceforge.net"
	<bitcoin-development@lists.sourceforge.net>
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Sender: Matthew Mitchell <matthewmitchell@godofgod.co.uk>
Subject: [Bitcoin-development] Fwd:  Segmented Block Relaying BIP draft.
Precedence: list


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Almost forgot...

Begin forwarded message:

> From: Matthew Mitchell <matthewmitchell@godofgod.co.uk>
> Subject: Re: [Bitcoin-development] Segmented Block Relaying BIP draft.
> Date: 10 September 2012 16:23:45 BST
> To: Gregory Maxwell <gmaxwell@gmail.com>
>=20
> By "gettreelevel" and "treelevel" you get the level of the merle tree =
with the hashes for the segments you want to download. You could request =
all the transaction hashes by specifying a very deep level. You could =
modify the proposal by removing the "level" byte in "gettreelevel" and =
always send the deepest level ie. The transaction hashes. Though by =
specifying the level you do not need to download all of the transaction =
hashes, only the hashes you need to verify each segment.
>=20
>=20
> On 10 Sep 2012, at 16:14, Gregory Maxwell <gmaxwell@gmail.com> wrote:
>>=20
>> Why does this focus on actually sending the hash tree?  The block
>> header + transaction list + transactions a node doesn't already know
>> (often just the coinbase) is enough.
>=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; =
">Almost forgot...<br><div><br><div>Begin forwarded message:</div><br =
class=3D"Apple-interchange-newline"><blockquote type=3D"cite"><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px;"><span style=3D"font-family:'Helvetica'; =
font-size:medium; color:rgba(0, 0, 0, 1.0);"><b>From: </b></span><span =
style=3D"font-family:'Helvetica'; font-size:medium;">Matthew Mitchell =
&lt;<a =
href=3D"mailto:matthewmitchell@godofgod.co.uk">matthewmitchell@godofgod.co=
.uk</a>&gt;<br></span></div><div style=3D"margin-top: 0px; margin-right: =
0px; margin-bottom: 0px; margin-left: 0px;"><span =
style=3D"font-family:'Helvetica'; font-size:medium; color:rgba(0, 0, 0, =
1.0);"><b>Subject: </b></span><span style=3D"font-family:'Helvetica'; =
font-size:medium;"><b>Re: [Bitcoin-development] Segmented Block Relaying =
BIP draft.</b><br></span></div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span =
style=3D"font-family:'Helvetica'; font-size:medium; color:rgba(0, 0, 0, =
1.0);"><b>Date: </b></span><span style=3D"font-family:'Helvetica'; =
font-size:medium;">10 September 2012 16:23:45 BST<br></span></div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px;"><span style=3D"font-family:'Helvetica'; =
font-size:medium; color:rgba(0, 0, 0, 1.0);"><b>To: </b></span><span =
style=3D"font-family:'Helvetica'; font-size:medium;">Gregory Maxwell =
&lt;<a =
href=3D"mailto:gmaxwell@gmail.com">gmaxwell@gmail.com</a>&gt;<br></span></=
div><br><div>By "gettreelevel" and "treelevel" you get the level of the =
merle tree with the hashes for the segments you want to download. You =
could request all the transaction hashes by specifying a very deep =
level. You could modify the proposal by removing the "level" byte in =
"gettreelevel" and always send the deepest level ie. The transaction =
hashes. Though by specifying the level you do not need to download all =
of the transaction hashes, only the hashes you need to verify each =
segment.<br><br><br>On 10 Sep 2012, at 16:14, Gregory Maxwell &lt;<a =
href=3D"mailto:gmaxwell@gmail.com">gmaxwell@gmail.com</a>&gt; =
wrote:<br><blockquote type=3D"cite"><br>Why does this focus on actually =
sending the hash tree? &nbsp;The block<br>header + transaction list + =
transactions a node doesn't already know<br>(often just the coinbase) is =
enough.<br></blockquote><br></div></blockquote></div><br></body></html>=

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