Return-Path: Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id CDAC3B6C for ; Wed, 27 Sep 2017 21:33:12 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from outmail149084.authsmtp.net (outmail149084.authsmtp.net [62.13.149.84]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 2539B3FD for ; Wed, 27 Sep 2017 21:33:11 +0000 (UTC) Received: from mail-c247.authsmtp.com (mail-c247.authsmtp.com [62.13.128.247]) by punt22.authsmtp.com (8.14.2/8.14.2/) with ESMTP id v8RLXA5x092317 for ; Wed, 27 Sep 2017 22:33:10 +0100 (BST) Received: from petertodd.org (ec2-52-5-185-120.compute-1.amazonaws.com [52.5.185.120]) (authenticated bits=0) by mail.authsmtp.com (8.14.2/8.14.2/) with ESMTP id v8RLX9Od019711 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Wed, 27 Sep 2017 22:33:09 +0100 (BST) Received: from [127.0.0.1] (localhost [127.0.0.1]) by petertodd.org (Postfix) with ESMTPSA id 8CFAD40100 for ; Wed, 27 Sep 2017 21:33:08 +0000 (UTC) Received: by localhost (Postfix, from userid 1000) id CE5BB205E4; Wed, 27 Sep 2017 17:33:07 -0400 (EDT) Date: Wed, 27 Sep 2017 17:33:07 -0400 From: Peter Todd To: Bitcoin Protocol Discussion Message-ID: <20170927213307.GA2270@savin.petertodd.org> References: <20170927160654.GA12492@savin.petertodd.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="OgqxwSJOaUobr8KG" Content-Disposition: inline In-Reply-To: <20170927160654.GA12492@savin.petertodd.org> User-Agent: Mutt/1.5.23 (2014-03-12) X-Server-Quench: 7562ad60-a3cb-11e7-a0cc-0015176ca198 X-AuthReport-Spam: If SPAM / abuse - report it at: http://www.authsmtp.com/abuse X-AuthRoute: OCd2Yg0TA1ZNQRgX IjsJECJaVQIpKltL GxAVJwpGK10IU0Fd P1hyKltILEZaQVBf Ri5dBBEKBAw1ADwr dVUTOktfZVUtCkV1 UkhIRUJQFg9rAhYA BlAbUAd3aQROfWBx Z0Z9XHVEXQo8fSQB KkcrQW0HbGBhaS4d UkFZOQRRdgEbKhlF dwF8ByEQYGRSYWcx RwQ4emhpZGgGd3pe S1hcfUQoTBRDLTQ9 WxsFHDNqEUAbcm0a IxA8J0UHVEsBKkQo OEcgXlRQLx4XBxYW BEFKHStVb1MMDyMn AQ5WFVIZWBd8eWIF XUZA X-Authentic-SMTP: 61633532353630.1038:706 X-AuthFastPath: 0 (Was 255) X-AuthSMTP-Origin: 52.5.185.120/25 X-AuthVirus-Status: No virus detected - but ensure you scan with your own anti-virus system. X-Spam-Status: No, score=-0.7 required=5.0 tests=RCVD_IN_DNSWL_LOW autolearn=disabled version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on smtp1.linux-foundation.org Subject: Re: [bitcoin-dev] Address expiration times should be added to BIP-173 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: Wed, 27 Sep 2017 21:33:12 -0000 --OgqxwSJOaUobr8KG Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Sep 27, 2017 at 12:06:54PM -0400, Peter Todd via bitcoin-dev wrote: > Being just an expiration time, seconds-level resolution is unnecessary, a= nd > may give the wrong impression. I'd suggest either: >=20 > 1) Hour resolution - 2^24 hours =3D 1914 years > 2) Month resolution - 2^16 months =3D 5458 years Just remembered: it's notable how Coinbase has a 10 minute timeout on their payment window, which is in effect a 10 minute expiry time for the address. Presumably they'd make use of this feature if it existed. --=20 https://petertodd.org 'peter'[:-1]@petertodd.org --OgqxwSJOaUobr8KG Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- iQEcBAEBCAAGBQJZzBkPAAoJECSBQD2l8JH7DAgH/167LZtajjxIPIlXxWwmRiKQ /v7o+7pMi+4Yp5NYEyxZdyKGqMPAcp1GWdPDDbul0pPant4fQwQDfHOnr7nj0njr SnTSY2ma2Rg71QjAzmq7SsJbeM0ga94c3Jvu+pX93OZ4nAENbUVP9KUsngEoAyx/ k7TvhphKEsRbFZV68rqTU3IGy8XU3eGdCIiBftmB1TezFkfVgrPIhz53t7E5ryek yQkis/VPreKzmeQT9T3UAA6S2jTFH0e4eNITSWDf5xbnkGPq8X4qMxK3zOml0jqm zCaVnnwl1JZwLWMOSsQ8Mc7BtbWmAdXRmckgIYGeNLZ1i9orgIzm7cBwkkLuLsg= =GDQF -----END PGP SIGNATURE----- --OgqxwSJOaUobr8KG--