Return-Path: Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 2CA9B8D7 for ; Sun, 5 Feb 2017 21:06:22 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from BAY004-OMC2S2.hotmail.com (bay004-omc2s2.hotmail.com [65.54.190.77]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 5401E1AC for ; Sun, 5 Feb 2017 21:06:21 +0000 (UTC) Received: from NAM03-CO1-obe.outbound.protection.outlook.com ([65.54.190.124]) by BAY004-OMC2S2.hotmail.com over TLS secured channel with Microsoft SMTPSVC(7.5.7601.23008); Sun, 5 Feb 2017 13:06:21 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=outlook.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version; bh=clJQWYMv8/PeU9/UMx25qwDf3bXHdB0KASMLLTceBQ4=; b=NHfPjMCHMG8P2S7uI63IxJytFAyvsn3iStgiCtbCYEn9uII0NZdku6LNQE2iLujeeFGVEIJnA37jb7gA+mY6vJP+92Fltq1I2xVLn0evTDTAnEfxlLk+yUeFNy8rXfqUAb2VwrXJUNcb0/mmJFAnly+fvCXI95A6g9jKTEWvI63gqCE833cjnCjxGTl8dDW/yOxlrLIrCfGIR3Pyp6vV0KS2Due2eeMG6A8qbVMxpj85lOPJ9fvqcpL3UTUFV4fbCrYINeTILJzB516iMjDhXf5G0VlU57Wn79wiYCFZhyOQeaGVuJtp1CoeldbhtL645zznJx9t8ge7H7TzyFSW5w== Received: from BY2NAM03FT022.eop-NAM03.prod.protection.outlook.com (10.152.84.52) by BY2NAM03HT071.eop-NAM03.prod.protection.outlook.com (10.152.84.192) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.888.7; Sun, 5 Feb 2017 21:06:20 +0000 Received: from BL2PR03MB435.namprd03.prod.outlook.com (10.152.84.53) by BY2NAM03FT022.mail.protection.outlook.com (10.152.84.225) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.888.7 via Frontend Transport; Sun, 5 Feb 2017 21:06:19 +0000 Received: from BL2PR03MB435.namprd03.prod.outlook.com ([10.141.92.24]) by BL2PR03MB435.namprd03.prod.outlook.com ([10.141.92.24]) with mapi id 15.01.0888.022; Sun, 5 Feb 2017 21:06:20 +0000 From: John Hardy To: "bitcoin-dev@lists.linuxfoundation.org" Thread-Topic: [bitcoin-dev] Transaction signalling through output address hashing Thread-Index: AQHSfbGZvr4KI3DKIEKafV3UKQG/oqFanJ6AgAAC/1OAAEw0+Q== Sender: John Hardy Date: Sun, 5 Feb 2017 21:06:19 +0000 Message-ID: References: , , In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: lists.linuxfoundation.org; dkim=none (message not signed) header.d=none; lists.linuxfoundation.org; dmarc=none action=none header.from=seebitcoin.com; x-incomingtopheadermarker: OriginalChecksum:CC3911F99E16CF1BE3AA0561BC73969D80A9C2CDC7F8CC01EAE58E4BF501E0F5; UpperCasedChecksum:CCD925670661D8562794CE4AA0D77C7569CB99B0DEA0550A5F6EF9F11CB1B2F3; SizeAsReceived:8094; Count:40 x-ms-exchange-messagesentrepresentingtype: 2 x-tmn: [N7YvtSF9QwuVzNqnjVi9UBcoKrRQabUq] x-incomingheadercount: 40 x-eopattributedmessage: 0 x-microsoft-exchange-diagnostics: 1; BY2NAM03HT071; 5:xuRJTruhEr6oetzPs2xFhtD8sw9BUZcC8UL+NClTt14lC0Oa7H830l2vX7QeEkSeV/2AGxf545MBy1KO79Wkg2gSI2CBB0pPaJNpCf+h5ysSs2nx1YIPhoyALzJLx6WfFkFEkuMiIPct4BRzj1b38+E0yn+lpdQUaCEr51OuTTo=; 24:Q73SLeaHcgSKRJ8MJdHEXiKKXBgvtxQk4bpuI8GIqAx3EM33xLKZV12QomuhoB6Z66A73uORs1bAvhwPUac9oEnrpLpWhALXqvn57ojYG1s=; 7: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 x-forefront-antispam-report: EFV:NLI; SFV:NSPM; SFS:(10019020)(98900005); DIR:OUT; SFP:1102; SCL:1; SRVR:BY2NAM03HT071; H:BL2PR03MB435.namprd03.prod.outlook.com; FPR:; SPF:None; LANG:en; x-ms-office365-filtering-correlation-id: 4821e2ec-3c17-4f59-bb3d-08d44e0ad56d x-microsoft-antispam: UriScan:; BCL:0; PCL:0; RULEID:(22001)(5061506426)(5061507331)(1603103135)(1601125107)(1603101373)(1701031045); SRVR:BY2NAM03HT071; x-exchange-antispam-report-cfa-test: BCL:0; PCL:0; RULEID:(444111334)(432015086)(82015046); SRVR:BY2NAM03HT071; BCL:0; PCL:0; RULEID:; SRVR:BY2NAM03HT071; x-forefront-prvs: 0209425D0A spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: multipart/alternative; boundary="_000_BL2PR03MB435DEA7CFB526C4DB58F740EE410BL2PR03MB435namprd_" MIME-Version: 1.0 X-OriginatorOrg: outlook.com X-MS-Exchange-CrossTenant-originalarrivaltime: 05 Feb 2017 21:06:19.8816 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Internet X-MS-Exchange-CrossTenant-id: 84df9e7f-e9f6-40af-b435-aaaaaaaaaaaa X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY2NAM03HT071 X-OriginalArrivalTime: 05 Feb 2017 21:06:21.0025 (UTC) FILETIME=[B35E5510:01D27FF3] X-Spam-Status: No, score=-1.6 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,FREEMAIL_ENVFROM_END_DIGIT,FREEMAIL_FROM,HTML_MESSAGE, RCVD_IN_DNSWL_NONE autolearn=no 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, 07 Feb 2017 08:56:18 +0000 Subject: [bitcoin-dev] Fw: Transaction signalling through output address hashing 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: Sun, 05 Feb 2017 21:06:22 -0000 --_000_BL2PR03MB435DEA7CFB526C4DB58F740EE410BL2PR03MB435namprd_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Probabilistic collisions, while present, would be statistically insignifica= nt at 4 chars length. Implementation by wallets would just require a loop of their existing addre= ss generation until a match is found, trivial to implement. Wallets could p= rovide a dropdown which shows the most commonly used signals as seen on the= block chain, or a write-in. Signalling within OP_RETURN increases the tx size and cost. This address ha= shing method keeps the very small economic cost of voting off the chain, ra= ther than passing it cumulatively to everyone with the insertion of additio= nal data. Since I wrote this I have come across a similar idea called CryptoVoter whi= ch I think deserves more attention than it has had. ________________________________ From: Natanael Sent: Sunday, February 5, 2017 4:22 PM To: Bitcoin Dev; John Hardy Subject: Re: [bitcoin-dev] Transaction signalling through output address ha= shing Censorship by miners isn't the only problem. Existing and normal transactio= ns will probabilistically collide with these schemes, and most wallets have= no straightforward way of supporting it. --_000_BL2PR03MB435DEA7CFB526C4DB58F740EE410BL2PR03MB435namprd_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Probabilistic collisions, while present, would be statisticall= y insignificant at 4 chars length.


Implementation by wallets would just require a loop of their existing ad= dress generation until a match is found, trivial to implement. Wallets coul= d provide a dropdown which shows the most commonly used signals as seen on = the block chain, or a write-in.

Signalling within OP_RETURN increases the tx size and cost. This address ha= shing method keeps the very small economic cost of voting off the chain, ra= ther than passing it cumulatively to everyone with the insertion of additio= nal data.


Since I wrote this I have come across a similar idea called CryptoVoter = which I think deserves more attention than it has had.



From: Natanael <natanael= .l@gmail.com>
Sent: Sunday, February 5, 2017 4:22 PM
To: Bitcoin Dev; John Hardy
Subject: Re: [bitcoin-dev] Transaction signalling through output add= ress hashing

Censorship by miners isn't the only problem. Existing and= normal transactions will probabilistically collide with these schemes, and= most wallets have no straightforward way of supporting it. 
--_000_BL2PR03MB435DEA7CFB526C4DB58F740EE410BL2PR03MB435namprd_--