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| author | Michael Grønager <gronager@ceptacle.com> | 2011-10-05 15:44:08 +0200 |
|---|---|---|
| committer | bitcoindev <bitcoindev@gnusha.org> | 2011-10-05 13:44:21 +0000 |
| commit | 3037e8249ea32532c1dfb83baff05920a6d8eab8 (patch) | |
| tree | 304ea17d850dfd5d04890ae8fbfa9bcf669c3750 | |
| parent | 4850b15f825569b06b59650e57f5dd65a7307038 (diff) | |
| download | pi-bitcoindev-3037e8249ea32532c1dfb83baff05920a6d8eab8.tar.gz pi-bitcoindev-3037e8249ea32532c1dfb83baff05920a6d8eab8.zip | |
Re: [Bitcoin-development] vtxPrev
| -rw-r--r-- | 30/c99f8dda7996fe08ea4c14d2b7be89c59186d1 | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/30/c99f8dda7996fe08ea4c14d2b7be89c59186d1 b/30/c99f8dda7996fe08ea4c14d2b7be89c59186d1 new file mode 100644 index 000000000..2455e6009 --- /dev/null +++ b/30/c99f8dda7996fe08ea4c14d2b7be89c59186d1 @@ -0,0 +1,96 @@ +Received: from sog-mx-4.v43.ch3.sourceforge.com ([172.29.43.194] + helo=mx.sourceforge.net) + by sfs-ml-4.v29.ch3.sourceforge.com with esmtp (Exim 4.76) + (envelope-from <gronager@ceptacle.com>) id 1RBRll-0008F1-UU + for bitcoin-development@lists.sourceforge.net; + Wed, 05 Oct 2011 13:44:21 +0000 +X-ACL-Warn: +Received: from backup-server.nordu.net ([193.10.252.66]) + by sog-mx-4.v43.ch3.sourceforge.com with esmtps (TLSv1:AES256-SHA:256) + (Exim 4.76) id 1RBRlh-0005RM-SD + for bitcoin-development@lists.sourceforge.net; + Wed, 05 Oct 2011 13:44:21 +0000 +Received: from [192.168.0.8] (2508ds5-oebr.0.fullrate.dk [95.166.54.87]) + (authenticated bits=0) + by backup-server.nordu.net (8.14.3/8.14.3) with ESMTP id p95Di8lA005807 + (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=NO); + Wed, 5 Oct 2011 15:44:09 +0200 (CEST) +Mime-Version: 1.0 (Apple Message framework v1244.3) +Content-Type: text/plain; charset=iso-8859-1 +From: =?iso-8859-1?Q?Michael_Gr=F8nager?= <gronager@ceptacle.com> +In-Reply-To: <CAAS2fgRiM9SFGVtYU1GJM8U0z8aMecc3Ng9wM4SNWkE5_MKPwQ@mail.gmail.com> +Date: Wed, 5 Oct 2011 15:44:08 +0200 +Content-Transfer-Encoding: quoted-printable +Message-Id: <03BEA6AD-7EF2-41D0-91A3-D943A7B2964D@ceptacle.com> +References: <E0AD809E-7446-4E18-9A2D-7E7480F8AB89@ceptacle.com> + <CAAS2fgRiM9SFGVtYU1GJM8U0z8aMecc3Ng9wM4SNWkE5_MKPwQ@mail.gmail.com> +To: Gregory Maxwell <gmaxwell@gmail.com> +X-Mailer: Apple Mail (2.1244.3) +X-Spam-Score: 0.0 (/) +X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. + See http://spamassassin.org/tag/ for more details. +X-Headers-End: 1RBRlh-0005RM-SD +Cc: Bitcoin Dev <bitcoin-development@lists.sourceforge.net> +Subject: Re: [Bitcoin-development] vtxPrev +X-BeenThere: bitcoin-development@lists.sourceforge.net +X-Mailman-Version: 2.1.9 +Precedence: list +List-Id: <bitcoin-development.lists.sourceforge.net> +List-Unsubscribe: <https://lists.sourceforge.net/lists/listinfo/bitcoin-development>, + <mailto:bitcoin-development-request@lists.sourceforge.net?subject=unsubscribe> +List-Archive: <http://sourceforge.net/mailarchive/forum.php?forum_name=bitcoin-development> +List-Post: <mailto:bitcoin-development@lists.sourceforge.net> +List-Help: <mailto:bitcoin-development-request@lists.sourceforge.net?subject=help> +List-Subscribe: <https://lists.sourceforge.net/lists/listinfo/bitcoin-development>, + <mailto:bitcoin-development-request@lists.sourceforge.net?subject=subscribe> +X-List-Received-Date: Wed, 05 Oct 2011 13:44:22 -0000 + +Oups - I was reading the code wrongly - going through = +AddSupportingTransactions carefully again... + +The vtxPrev contains a list of the supporting confirmations up to 3 = +confirmations back. So it is only of relevance (and only gets filled) if = +you accept coins that are less than 3 confirmations old. In this case = +you would like to resend the depending transactions to the network in = +case of chain splits. + +This makes much more sense, but also, it is only of relevance when you = +accept newly earned coins. And it will only be of relevance for half an = +hour or so. + +Cheers, + +Michael + + + +On 05/10/2011, at 14:50, Gregory Maxwell wrote: + +> On Wed, Oct 5, 2011 at 8:31 AM, Michael Gr=F8nager = +<gronager@ceptacle.com> wrote: +>> The vtxPrev stores 3 transactions back, but as transactions need 7 = +block to maturity and respendability isn't it overkill - I mean it is = +highly unlikely that a transaction gets invalid after 7 confirmations = +and +>=20 +> They don't need 7 blocks to maturity and respendability. The software +> will attempt to use older inputs when available but if not it will use +> what it has. It's also prone to respending its own outputs quickly +> because it reasonably trusts that it won't doublespend its own +> transactions. +>=20 +> And, yes, if there is a deep split then its possible that inputs might +> have been spent differently in the new split. But it's not especially +> likely. Retransmitting one of your own txn's parents if its dropped +> but not yet impossible sounds prudent to me. + +Michael Gronager, PhD +Owner Ceptacle / NDGF Director, NORDUnet A/S +Jens Juels Gade 33 +2100 Copenhagen E +Mobile: +45 31 62 14 01 +E-mail: gronager@ceptacle.com + + + + |