From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sog-mx-2.v43.ch3.sourceforge.com ([172.29.43.192] helo=mx.sourceforge.net) by sfs-ml-1.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1W0yxI-0007N0-Ho for bitcoin-development@lists.sourceforge.net; Wed, 08 Jan 2014 19:38:20 +0000 Received-SPF: pass (sog-mx-2.v43.ch3.sourceforge.com: domain of gmail.com designates 209.85.128.44 as permitted sender) client-ip=209.85.128.44; envelope-from=clem.ds@gmail.com; helo=mail-qe0-f44.google.com; Received: from mail-qe0-f44.google.com ([209.85.128.44]) by sog-mx-2.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-SHA:128) (Exim 4.76) id 1W0yxH-0002Yo-Jd for bitcoin-development@lists.sourceforge.net; Wed, 08 Jan 2014 19:38:20 +0000 Received: by mail-qe0-f44.google.com with SMTP id nd7so2236860qeb.17 for ; Wed, 08 Jan 2014 11:38:14 -0800 (PST) MIME-Version: 1.0 X-Received: by 10.49.127.131 with SMTP id ng3mr10067706qeb.57.1389209894087; Wed, 08 Jan 2014 11:38:14 -0800 (PST) Received: by 10.229.177.195 with HTTP; Wed, 8 Jan 2014 11:38:14 -0800 (PST) Date: Wed, 8 Jan 2014 20:38:14 +0100 Message-ID: From: =?ISO-8859-1?Q?Cl=E9ment_Elbaz?= To: bitcoin-development@lists.sourceforge.net Content-Type: multipart/alternative; boundary=047d7b6d7b5641708904ef7aa28b X-Spam-Score: -0.6 (/) X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. See http://spamassassin.org/tag/ for more details. -1.5 SPF_CHECK_PASS SPF reports sender host as permitted sender for sender-domain 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (clem.ds[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record 1.0 HTML_MESSAGE BODY: HTML included in message -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature X-Headers-End: 1W0yxH-0002Yo-Jd Subject: [Bitcoin-development] Getting trusted metrics from the block chain in an untrusted environment ? 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, 08 Jan 2014 19:38:20 -0000 --047d7b6d7b5641708904ef7aa28b Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Hello all, I'm designing a program that needs some metrics computed from the Bitcoin block chain (some address balances, or the occurrence or not of a specific transaction). The kind of infos you get from http://blockchain.info/, provided you trust this website (my program do not). My program should run on lightweight/embedded hardware. The execution environment provides access to the Bitcoin network but not enough resources to set up a trusted node along with my program. Also, my program trusts the global Bitcoin network but no individual node. I would need a way to ask an untrusted Bitcoin node to compute some 'metric request' on my behalf and having the result of that metric request validated by the network. Is there any available or work-in-progress projects that would come close to this need ? Or should I do it myself ? :-) Thank you all, Cl=E9ment Elbaz --047d7b6d7b5641708904ef7aa28b Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Hello all,

I'm designing a program that needs s= ome metrics computed from the Bitcoin block chain (some address balances, o= r the occurrence or not of a specific transaction). The kind of infos you g= et from http://blockchain.info/, pr= ovided you trust this website (my program do not).

My program should run on lightweight/embedded hardware. The execution e= nvironment provides access to the Bitcoin network but not enough resources = to set up a trusted node along with my program. Also, my program trusts the= global Bitcoin network but no individual node.

I would need a way to ask an untrusted Bitcoin node to compute some = 9;metric request' on my behalf and having the result of that metric req= uest validated by the network.

Is there any available or work-in-pro= gress projects that would come close to this need ? Or should I do it mysel= f ? :-)

Thank you all,

Cl=E9ment Elbaz
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