Received: from sog-mx-2.v43.ch3.sourceforge.com ([172.29.43.192] helo=mx.sourceforge.net) by sfs-ml-2.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1Y9ZWI-0002Fh-Ty for bitcoin-development@lists.sourceforge.net; Fri, 09 Jan 2015 13:22:30 +0000 Received-SPF: pass (sog-mx-2.v43.ch3.sourceforge.com: domain of bitpay.com designates 209.85.214.169 as permitted sender) client-ip=209.85.214.169; envelope-from=jgarzik@bitpay.com; helo=mail-ob0-f169.google.com; Received: from mail-ob0-f169.google.com ([209.85.214.169]) by sog-mx-2.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-SHA:128) (Exim 4.76) id 1Y9ZWE-0000oa-MB for bitcoin-development@lists.sourceforge.net; Fri, 09 Jan 2015 13:22:28 +0000 Received: by mail-ob0-f169.google.com with SMTP id vb8so12995075obc.0 for ; Fri, 09 Jan 2015 05:22:21 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc:content-type; bh=sJGA60+azraSEWWmov+OiFrtx+So5oub9g8g/2EP6G4=; b=HolXAgxDp5BEsjXY3mSMGgjPk6IXoYpTf8SKRHKEt5HA2IqIoIILQTZ608SmrP7LfJ UwUfoHoEFQLxPvffVmb6IUj4X4zaXwG8VAnrQrRJQO33C/Ozo2GPpeZIOjwPX8ux0lST aSxRBCP7IebzHUVn/2gP6CLe4vw1vpb4Q5dQnzYP+euJN/5ags+9pawI/wGJ0h1lWlzp 53eu8Iyy/vdpEqUpaVq/cwnKja8zjA7MOASQ1o1scLMxYt8oWSXBz9xU3LA+tv5tmrFF F9ThAUYCtqT7T1oQZFOn4meg6YsOXVFxNFxcwWnZEaL44b7Y8fmkTz6rp4uCcmhosblC Te0A== X-Gm-Message-State: ALoCoQmyyLDJJN9CtVyt6cH6FcoPOFEFauVU8x0Rk/x7B88MNqEjV/Tcbb/ntn9CT5o2L5pthhet X-Received: by 10.202.173.198 with SMTP id w189mr8599340oie.27.1420809741228; Fri, 09 Jan 2015 05:22:21 -0800 (PST) MIME-Version: 1.0 Received: by 10.202.209.9 with HTTP; Fri, 9 Jan 2015 05:22:00 -0800 (PST) In-Reply-To: References: From: Jeff Garzik Date: Fri, 9 Jan 2015 08:22:00 -0500 Message-ID: To: Mike Hearn Content-Type: multipart/alternative; boundary=001a113eabb4eb7565050c380b16 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 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: 1Y9ZWE-0000oa-MB Cc: Bitcoin Dev Subject: Re: [Bitcoin-development] Bi-directional micropayment channels with CHECKLOCKTIMEVERIFY 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: Fri, 09 Jan 2015 13:22:31 -0000 --001a113eabb4eb7565050c380b16 Content-Type: text/plain; charset=UTF-8 Mike, Can you be more specific? You reference "original design" without saying how it was different/better. On Fri, Jan 9, 2015 at 8:20 AM, Mike Hearn wrote: > A limitation on most existing micropayment channel ideas is that payments >> can only flow in one direction. >> > > It's worth noting that the original protocol as designed by Satoshi did > not have this limitation. It has evolved this way because of ad-hoc DoS > fixes over time (btw I'm not saying they were the wrong thing to do, as non > "ad hoc" solutions are significantly more work). But it seems like > eventually a different approach to handling DoS attacks based on resource > prioritisation and scheduling will become needed / implemented, and at that > point the original design could be safely brought back to life. > > > > ------------------------------------------------------------------------------ > Dive into the World of Parallel Programming! The Go Parallel Website, > sponsored by Intel and developed in partnership with Slashdot Media, is > your > hub for all things parallel software development, from weekly thought > leadership blogs to news, videos, case studies, tutorials and more. Take a > look and join the conversation now. http://goparallel.sourceforge.net > _______________________________________________ > Bitcoin-development mailing list > Bitcoin-development@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/bitcoin-development > > -- Jeff Garzik Bitcoin core developer and open source evangelist BitPay, Inc. https://bitpay.com/ --001a113eabb4eb7565050c380b16 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Mike, Can you be more specific?=C2=A0 You reference "= original design" without saying how it was different/better.


On Fri, J= an 9, 2015 at 8:20 AM, Mike Hearn <mike@plan99.net> wrote:
=
=
A limitation on most existing micropayment channel ideas is that pa= yments can only flow in one direction.=C2=A0
<= br>
It's worth noting that the original protocol as de= signed by Satoshi did not have this limitation. It has evolved this way bec= ause of ad-hoc DoS fixes over time (btw I'm not saying they were the wr= ong thing to do, as non "ad hoc" solutions are significantly more= work). But it seems like eventually a different approach to handling DoS a= ttacks based on resource prioritisation and scheduling will become needed /= implemented, and at that point the original design could be safely brought= back to life.


-----------------------------------------------------------------------= -------
Dive into the World of Parallel Programming! The Go Parallel Website,
sponsored by Intel and developed in partnership with Slashdot Media, is you= r
hub for all things parallel software development, from weekly thought
leadership blogs to news, videos, case studies, tutorials and more. Take a<= br> look and join the conversation now. http://goparallel.sourceforge.net
_________= ______________________________________
Bitcoin-development mailing list
Bitcoin-develo= pment@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/bitcoin-de= velopment




--
Jeff Garzik
Bitcoin core developer and open source evangelis= t
BitPay, Inc. =C2=A0 =C2=A0 =C2=A0https://bitpay.com/
--001a113eabb4eb7565050c380b16--