Return-Path: Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id EAC621017 for ; Tue, 25 Sep 2018 15:47:43 +0000 (UTC) X-Greylist: whitelisted by SQLgrey-1.7.6 Received: from mail-it1-f174.google.com (mail-it1-f174.google.com [209.85.166.174]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 4C5B5773 for ; Tue, 25 Sep 2018 15:47:43 +0000 (UTC) Received: by mail-it1-f174.google.com with SMTP id h3-v6so16034599ita.2 for ; Tue, 25 Sep 2018 08:47:43 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=nCzwkb/iAfR/15jGEqEzbAFumQUXWXXp8Fykp7FTggY=; b=uARHvjLlfwOSW74QnD5T867Mln/tgV2GSObglnHAcOWGy5EbtOSyojHA+I/qCYkjPQ UD/SuOLQ4vUYHRSTTYk72rtY/rALdLIXERmuILaddDd6YEewCIKDxGE10vn27Mxan74m JKt3pTCpLcnhb/C2B5xj/2iRxE8jbsKgaYXW8sEro0K3PfWh+OvTjIAAag5RLaNdIcLX xysPxWQIZ7fblC5JYCmYQWa/jLDoeN0R8qC8zBiw/+e7xi2HIvNsxzfRjOlpB7L2MF9v QyDXIQo/4nAph2CMfFdAz4xutmYCvIzeOn+aQ0fg71BnjQgxzkUkft8cmuwulXwf3BDq 8RzA== X-Gm-Message-State: ABuFfoghgsrnpzgRUCtuYzHvSEkN9LkNYTpcWoeifPp+qvWfDUFpofyE zeWTnfnRLHGpRHlR9dodKvfFACpOlCDDcM/VQ6ncO1mQ X-Google-Smtp-Source: ACcGV61867A5idOQUVeCutWiWMuyRD28KkvgRta/8ZqbW2q7vp1olvudNZh1/O6kanMrvI0R8hnSTs8OZhc0APjcsuE= X-Received: by 2002:a02:1c48:: with SMTP id c69-v6mr1579771jac.65.1537890462486; Tue, 25 Sep 2018 08:47:42 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Dave Scotese Date: Tue, 25 Sep 2018 08:47:28 -0700 Message-ID: To: Bitcoin Dev Content-Type: multipart/alternative; boundary="000000000000b856d20576b4068b" X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM, HTML_MESSAGE,RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on smtp1.linux-foundation.org X-Mailman-Approved-At: Tue, 25 Sep 2018 23:52:09 +0000 Subject: Re: [bitcoin-dev] Proposal to replace full blockchain with recent history plus UTXO Set X-BeenThere: bitcoin-dev@lists.linuxfoundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Bitcoin Protocol Discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 25 Sep 2018 15:47:44 -0000 --000000000000b856d20576b4068b Content-Type: text/plain; charset="UTF-8" The image at imgur and the pastebin both reference block 542324 but the correct block is 542322. As the pastebin shows, the decimal and hex representations I gave for the block height did not match, and this is why. If you use the Merkle root for block 542322 instead of 542324, you'll be able to see the correct Game of Life play out and make the apron image. Dave. On Fri, Sep 21, 2018 at 6:49 PM Dave Scotese wrote: > I've been working on an idea that relieves full nodes of storing the > entire blockchain. Open source software generally relies on the fact that > "enough" people agree that it's secure. Bitcoin software works that way > too. So if you understand enough to see that a UTXO set is valid at a > certain block height, and there are enough other people who agree and that > set is recognizable by humans, then we can use that UTXO set and ditch the > blockchain that existed up to that point. It would save a lot of storage > and make it a lot easier to run a full node. > > Have you reviewed the source code from which your wallets were compiled? > At some point, we all trust third parties, but generally (at least among > people who understand Bitcoin) they are large composite groups so that no > small group or individual can profit from cheating. > > I look forward to answering any concerns and also to any offers of help. I > used block 542324 of the Bitcoin blockchain to make a memorable experience > using the game of life. I wrote a script for the open-source Game-of-Life > software Golly and shared it in the paste at https://pastebin.com/k5Ssc0qk. > It produces the image at https://imgur.com/a/rwIQuVz. If someone can tell > me how to get a UTXO Set from the bitcoin client, I'll send them $50 of > bitcoin. Then I could get the SHA256 hash of that set and try to make a > recognizable checkpoint for the Bitcoin blockchain. If someone runs Golly > and shares a video of the game playing out (into the apron-shaped image), > I'll send them $50 of bitcoin too. > > In a few decades when the blockchain has grown to a few terabytes and the > UTXO Set is still just a few gigabytes, I'd like to see more people start > running full nodes without the hassle of a long wait and loads of storage > space. That's what stops me from running one. > > -- I like to provide some work at no charge to prove my value. Do you need a techie? I own Litmocracy and Meme Racing (in alpha). I'm the webmaster for The Voluntaryist which now accepts Bitcoin. I also code for The Dollar Vigilante . "He ought to find it more profitable to play by the rules" - Satoshi Nakamoto --000000000000b856d20576b4068b Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
The image at imgur and the pastebin both reference block 542324 but the correct block is 542322.=C2=A0 As the pastebin shows, the decimal and= =20 hex representations I gave for the block height did not match, and this=20 is why.=C2=A0 If you use the Merkle root for block 542322 instead of 542324= ,=20 you'll be able to see the correct Game of Life play out and make the=20 apron image.

Dave.

On Fri, Sep 21, 2018 = at 6:49 PM Dave Scotese <dsco= tese@litmocracy.com> wrote:
=
I've been working on an idea that rel= ieves full nodes of storing the entire blockchain. Open source software gen= erally relies on the fact that "enough" people agree that it'= s secure. Bitcoin software works that way too. So if you understand enough = to see that a UTXO set is valid at a certain block height, and there are en= ough other people who agree and that set is recognizable by humans, then we= can use that UTXO set and ditch the blockchain that existed up to that poi= nt. It would save a lot of storage and make it a lot easier to run a full n= ode.

Have you reviewed the source code from which your wallets were = compiled?
At some point, we all trust third parties, but generally (at l= east among people who understand Bitcoin) they are large composite groups s= o that no small group or individual can profit from cheating.

<= span style=3D"color:rgb(0,0,0);font-family:Tahoma,sans-serif,Arial,Helvetic= a;font-size:13px;font-style:normal;font-variant-ligatures:normal;font-varia= nt-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-= indent:0px;text-transform:none;white-space:pre-wrap;word-spacing:0px;backgr= ound-color:rgb(242,246,250);text-decoration-style:initial;text-decoration-c= olor:initial;display:inline;float:none">
I look forward to answering any concerns and also to any offers of he= lp.=C2=A0=C2=A0 I used block 542324 of the Bitcoin= blockchain to make a memorable experience using the game of life. I wrote= a script for the open-source Game-of-Life software Golly and shared it in = the paste at https://pastebin.com/k5S= sc0qk. It produces the image = at https://imgur.com/a/rwIQuVz. If someone can tell me how to get a = UTXO Set from the bitcoin client, I'll send them $50 of bitcoin. Then I= could get the SHA256 hash of that set and try to make a recognizable check= point for the Bitcoin blockchain. If someone runs Golly and shares a video= of the game playing out (into the apron-shaped image), I'll send them = $50 of bitcoin too.

In a fe= w decades when the blockchain has grown to a few terabytes and the UTXO Set= is still just a few gigabytes, I'd like to see more people start runni= ng full nodes without the hassle of a long wait and loads of storage space.= That's what stops me from running one.



--
I like = to provide some work at no charge to prove my value. Do you need a techie?= =C2=A0
I own Li= tmocracy and Me= me Racing (in alpha).
I'm the webmaster for The Voluntaryist which now accep= ts Bitcoin.
I also code for The Dollar Vigilante.
"He ought to find it more p= rofitable to play by the rules" - Satoshi Nakamoto
--000000000000b856d20576b4068b--