From: Eric Lombrozo <elombrozo@gmail•com>
To: Mike Hearn <hearn@vinumeris•com>
Cc: bitcoin-dev@lists•linuxfoundation.org
Subject: Re: [bitcoin-dev] Bitcoin Core and hard forks
Date: Wed, 22 Jul 2015 15:09:26 -0700 [thread overview]
Message-ID: <8CD11148-3669-43AD-A3CB-5060ED0DB37E@gmail.com> (raw)
In-Reply-To: <CA+w+GKQ_b0gMFov24nt8ZX89=GDWTpX9J15sj=fuicQBqBVcag@mail.gmail.com>
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> On Jul 22, 2015, at 3:01 PM, Mike Hearn <hearn@vinumeris•com> wrote:
>
> Until we’re able to merge blockchain forks like we’re able to merge git repo forks, the safest option is no fork.
>
> Block chain forks merge in the same way as git forks all the time, that's how the reorg algorithm works. Transactions that didn't make it into the post-reorg chain go back into the mempool and miners attempt to reinclude them: this is the "merge" process. If they now conflict with other transactions they are dropped and this is "resolving merge conflicts".
>
Blockchain reorgs are part of the consensus rules. We’re talking not about forks caused by network partitions…but forks caused by the use of distinct consensus rules.
> However you have to want to merge with the new chain. If your software is programmed not to do that out of some bizarre belief that throttling your own user base is a good idea, then of course, no merge happens. Once you stop telling your computer to do that, you can then merge (reorg) back onto the main chain again.
>
You cannot merge two chains that have incompatible transactions in them without throwing away one of the two conflicting transactions (along with all dependencies). In the reorg process, this occurs naturally…and we allow for it by using confirmation count as a metric of irreversibility. Until one chain wins (by overwhelming consensus) or all chains include a particular transaction in question, we cannot treat that transaction as irreversible. Propose a model in which we can still reliably measure irreversibility in the presence of multiple chains and you might have a point.
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next prev parent reply other threads:[~2015-07-22 22:09 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CAPg+sBgs-ouEMu=LOVCmOyCGwfM1Ygxooz0shyvAuHDGGZYfJw@mail.gmail.com>
2015-07-22 16:52 ` Pieter Wuille
2015-07-22 17:18 ` Ross Nicoll
2015-07-22 17:32 ` Milly Bitcoin
2015-07-22 18:45 ` Bryan Cheng
2015-07-22 17:33 ` Jeff Garzik
2015-07-22 18:01 ` Jeff Garzik
2015-07-22 18:03 ` Alex Morcos
2015-07-22 18:24 ` Jeff Garzik
2015-07-23 12:17 ` Jorge Timón
2015-07-23 16:17 ` Tom Harding
2015-07-23 16:28 ` Gavin Andresen
2015-07-23 16:50 ` cipher anthem
2015-07-23 17:14 ` Robert Learney
2015-07-23 18:21 ` Eric Lombrozo
2015-07-23 18:47 ` Jorge Timón
2015-07-23 17:43 ` Eric Lombrozo
2015-07-23 18:10 ` Jameson Lopp
2015-07-23 19:14 ` Eric Lombrozo
2015-07-23 19:35 ` Gavin Andresen
2015-07-23 19:39 ` Eric Lombrozo
2015-07-23 19:51 ` Eric Lombrozo
2015-07-23 19:52 ` Jameson Lopp
2015-07-23 20:26 ` Jorge Timón
2015-07-23 20:52 ` Eric Lombrozo
2015-07-23 23:42 ` Benedict Chan
[not found] ` <42BF7FEB-320F-43BE-B3D9-1D76CB8B9975@gmai>
2015-07-23 23:57 ` Eric Lombrozo
2015-07-24 0:04 ` Eric Lombrozo
2015-07-24 0:20 ` Simon Liu
2015-07-24 0:22 ` Jean-Paul Kogelman
2015-07-24 0:32 ` Eric Lombrozo
2015-07-24 0:38 ` Eric Lombrozo
2015-07-24 0:45 ` Jean-Paul Kogelman
2015-07-24 0:49 ` Jean-Paul Kogelman
2015-07-24 0:53 ` Peter Todd
2015-07-24 1:03 ` Jean-Paul Kogelman
2015-07-24 1:08 ` Eric Lombrozo
2015-07-24 1:25 ` Jean-Paul Kogelman
2015-07-24 1:28 ` Eric Lombrozo
2015-07-24 1:37 ` Eric Lombrozo
2015-07-24 1:42 ` Jean-Paul Kogelman
2015-07-24 1:55 ` Eric Lombrozo
2015-07-24 2:12 ` [bitcoin-dev] Bitcoin, Perceptions, and Expectations Raystonn .
2015-07-24 8:48 ` Jonas Schnelli
2015-07-24 9:42 ` Jorge Timón
2015-07-24 14:37 ` Vincent Truong
2015-07-25 2:18 ` gb
2015-07-25 11:22 ` Slurms MacKenzie
2015-07-25 15:04 ` Thomas Kerin
2015-07-24 0:56 ` [bitcoin-dev] Bitcoin Core and hard forks Eric Lombrozo
2015-07-24 1:05 ` Jean-Paul Kogelman
2015-07-23 18:12 ` Slurms MacKenzie
2015-07-23 18:57 ` Mike Hearn
2015-07-23 17:51 ` Jorge Timón
2015-07-24 6:30 ` Tom Harding
2015-07-24 9:24 ` Jorge Timón
2015-07-24 22:50 ` Tom Harding
2015-07-28 11:29 ` Jorge Timón
2015-07-28 11:32 ` Jorge Timón
2015-07-28 16:44 ` Tom Harding
2015-07-28 17:33 ` Jorge Timón
2015-07-22 19:17 ` Eric Lombrozo
2015-07-22 21:43 ` Mike Hearn
2015-07-22 21:56 ` Eric Lombrozo
2015-07-22 22:01 ` Mike Hearn
2015-07-22 22:09 ` Eric Lombrozo [this message]
2015-07-23 1:53 ` Eric Lombrozo
2015-07-22 22:30 ` Jeff Garzik
2015-07-23 0:27 ` Tom Harding
2015-07-23 0:37 ` Eric Lombrozo
2015-07-23 4:40 ` Edmund Edgar
2015-07-27 12:08 ` Peter Todd
2015-07-27 12:44 ` Milly Bitcoin
2015-07-22 22:40 Raystonn
2015-07-22 23:42 ` Cory Fields
2015-07-22 23:53 ` Eric Lombrozo
2015-07-23 0:05 ` Cory Fields
2015-07-23 0:13 ` Eric Lombrozo
2015-07-23 0:34 ` Cory Fields
2015-07-23 0:43 ` Eric Lombrozo
2015-07-23 7:24 ` Ross Nicoll
2015-07-23 0:49 ` Eric Voskuil
2015-07-23 18:12 ` Jorge Timón
[not found] <BA7ACCE1-81B2-4AC1-B6DD-7A856FD27D52@gmail.com>
2015-07-23 8:24 ` Gareth Williams
2015-07-27 17:05 Alice Larson
2015-07-27 17:22 ` Eric Voskuil
2015-07-28 4:55 ` Wladimir J. van der Laan
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