Received: from sog-mx-2.v43.ch3.sourceforge.com ([172.29.43.192] helo=mx.sourceforge.net) by sfs-ml-4.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1WXzfb-0005FE-Oo for bitcoin-development@lists.sourceforge.net; Wed, 09 Apr 2014 21:04:31 +0000 Received-SPF: pass (sog-mx-2.v43.ch3.sourceforge.com: domain of gmail.com designates 209.85.217.169 as permitted sender) client-ip=209.85.217.169; envelope-from=gmaxwell@gmail.com; helo=mail-lb0-f169.google.com; Received: from mail-lb0-f169.google.com ([209.85.217.169]) by sog-mx-2.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-SHA:128) (Exim 4.76) id 1WXzfa-0007iS-Ra for bitcoin-development@lists.sourceforge.net; Wed, 09 Apr 2014 21:04:31 +0000 Received: by mail-lb0-f169.google.com with SMTP id q8so1607824lbi.14 for ; Wed, 09 Apr 2014 14:04:24 -0700 (PDT) MIME-Version: 1.0 X-Received: by 10.112.139.6 with SMTP id qu6mr8628833lbb.5.1397077464123; Wed, 09 Apr 2014 14:04:24 -0700 (PDT) Received: by 10.112.89.68 with HTTP; Wed, 9 Apr 2014 14:04:24 -0700 (PDT) In-Reply-To: <5345AF53.8070700@monetize.io> References: <53456B99.9010207@monetize.io> <00b77560-d7ed-4ed4-a4e5-eb1f00467a06@email.android.com> <0509477C-89F9-47C7-8820-29ACAD4A4A8E@bitsofproof.com> <534592E2.7040800@gmail.com> <5345986C.3040901@gmail.com> <5345AF53.8070700@monetize.io> Date: Wed, 9 Apr 2014 14:04:24 -0700 Message-ID: From: Gregory Maxwell To: Mark Friedenbach Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Spam-Score: -1.6 (-) 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 (gmaxwell[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record -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: 1WXzfa-0007iS-Ra Cc: Bitcoin Development Subject: Re: [Bitcoin-development] Bitcoind-in-background mode for SPV wallets 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, 09 Apr 2014 21:04:31 -0000 On Wed, Apr 9, 2014 at 1:36 PM, Mark Friedenbach wrote: > (2) there's a reasonable pathway to doing this all in-protocol, so there'= s > no reason to introduce external dependencies. Not just a speculative pathway. Pieter implemented headers first: https://github.com/sipa/bitcoin/tree/headersfirst and it was everything we hoped it would be=E2=80=94 it easily can saturate residential broadband, produces less load hot-spotting, copes with unreliable peers, etc. It's now just slowly making its way into Bitcoin core.