From mboxrd@z Thu Jan 1 00:00:00 1970 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 1VbZLB-0002pN-7S for bitcoin-development@lists.sourceforge.net; Wed, 30 Oct 2013 17:13:57 +0000 Received-SPF: pass (sog-mx-2.v43.ch3.sourceforge.com: domain of gmail.com designates 209.85.217.182 as permitted sender) client-ip=209.85.217.182; envelope-from=gmaxwell@gmail.com; helo=mail-lb0-f182.google.com; Received: from mail-lb0-f182.google.com ([209.85.217.182]) by sog-mx-2.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-SHA:128) (Exim 4.76) id 1VbZLA-00047Q-A9 for bitcoin-development@lists.sourceforge.net; Wed, 30 Oct 2013 17:13:57 +0000 Received: by mail-lb0-f182.google.com with SMTP id w6so1492087lbh.13 for ; Wed, 30 Oct 2013 10:13:49 -0700 (PDT) MIME-Version: 1.0 X-Received: by 10.112.64.7 with SMTP id k7mr1856620lbs.43.1383153229557; Wed, 30 Oct 2013 10:13:49 -0700 (PDT) Received: by 10.112.89.72 with HTTP; Wed, 30 Oct 2013 10:13:49 -0700 (PDT) In-Reply-To: References: <274a1888-276c-4aa6-a818-68f548fbe0fa@me.com> <9DCDB8F6-E3B2-426B-A41E-087E66B3821A@gmail.com> <526B45DB.2030200@jerviss.org> Date: Wed, 30 Oct 2013 10:13:49 -0700 Message-ID: From: Gregory Maxwell To: Mike Hearn Content-Type: text/plain; charset=UTF-8 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 0.0 URIBL_BLOCKED ADMINISTRATOR NOTICE: The query to URIBL was blocked. See http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block for more information. [URIs: plan99.net] -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: 1VbZLA-00047Q-A9 Cc: Bitcoin Dev , kjj Subject: Re: [Bitcoin-development] Feedback requested: "reject" p2p message 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, 30 Oct 2013 17:13:57 -0000 On Sun, Oct 27, 2013 at 7:32 AM, Mike Hearn wrote: > I'm really looking forward to this. Currently bitcoinj gets a small but > steady stream of bug reports of the form "my transaction did not propagate". > It's flaky because the library picks one peer to send the transaction to, > and then watches it propagate across the network. But if that selected peer > refuses the tx for whatever reason, that propagation never comes, and Actually, we'll probably need to explicitly document that a failure to reject is by no means a promise to forward. If a node is using priority queued rate limiting for its relaying then it might "accept" a transaction from you, but have it fall out of its memory pool (due to higher priority txn arriving, or getting restarted, etc.) before it ever gets a chance to send it on to any other peers. Finding out that it rejected is still useful information, but even assuming all nodes are honest and well behaved I don't think you could count on its absence to be sure of forwarding.