diff options
| author | Jorge Timón <jtimon@jtimon.cc> | 2015-05-14 01:46:04 +0200 |
|---|---|---|
| committer | bitcoindev <bitcoindev@gnusha.org> | 2015-05-14 00:38:27 +0000 |
| commit | a2de3bf5d16035540a0007be545085f0ffae3ab5 (patch) | |
| tree | 4d8016da70c958caa882db771623b8c1013a8679 | |
| parent | be9a83dbf50305ad7cbc54fb3befd9deeb8d31df (diff) | |
| download | pi-bitcoindev-a2de3bf5d16035540a0007be545085f0ffae3ab5.tar.gz pi-bitcoindev-a2de3bf5d16035540a0007be545085f0ffae3ab5.zip | |
Re: [Bitcoin-development] Long-term mining incentives
| -rw-r--r-- | 18/a0d7d9b1475f0391d8ceec2f97a6e5a9033320 | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/18/a0d7d9b1475f0391d8ceec2f97a6e5a9033320 b/18/a0d7d9b1475f0391d8ceec2f97a6e5a9033320 new file mode 100644 index 000000000..326812cab --- /dev/null +++ b/18/a0d7d9b1475f0391d8ceec2f97a6e5a9033320 @@ -0,0 +1,96 @@ +Received: from sog-mx-1.v43.ch3.sourceforge.com ([172.29.43.191] + helo=mx.sourceforge.net) + by sfs-ml-3.v29.ch3.sourceforge.com with esmtp (Exim 4.76) + (envelope-from <jtimon@jtimon.cc>) id 1YshAR-0006zV-Fp + for bitcoin-development@lists.sourceforge.net; + Thu, 14 May 2015 00:38:27 +0000 +Received: from mail-ob0-f182.google.com ([209.85.214.182]) + by sog-mx-1.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-SHA:128) + (Exim 4.76) id 1YshAQ-0003Ej-Ny + for bitcoin-development@lists.sourceforge.net; + Thu, 14 May 2015 00:38:27 +0000 +Received: by obfe9 with SMTP id e9so42512564obf.1 + for <bitcoin-development@lists.sourceforge.net>; + Wed, 13 May 2015 17:38:21 -0700 (PDT) +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:date + :message-id:subject:from:to:cc:content-type; + bh=LMtghqKc8v+CT2ZuWCFl93Ia427RdskJKN5Xd8xkOAg=; + b=Og7ikCLgfhJBZa3pYCNhm+/5s0O5z5hkQPKJH1UnFnWKSk73sShDf8PGKr2ZFa6JxP + EyZIKfZIXK65g7vY+DmxjkOhLlKhZitXkDJGU6S8MDnEXv4YbE4zcsffxqlSQSnH7DjZ + NdPnLB+H3aYkh0rtLSs0zrylr+ZgX8tnc9P0ZNL1q1LTcYXa2sCS+9WXOqLufigg+HHY + YX/WVUwZCOqeCQ9YZ4wFl1OphgEMtEkSIpVlUcEZxjgAt5PCZFgDpOaIAjnCZhAVjHwo + tyK15KdsfMTAit+U1tVgYWznMR6yE6PqRzPsOeiaaf09/vv4/9D33hr7od4FgDqhthEA + UBgg== +X-Gm-Message-State: ALoCoQmPXlWMGjkcQwCYSIIXtJUmQ/r0Ef/llHYv1S27dRaMGKDJe9q7qORM4EVC5X+7uy23zKyf +MIME-Version: 1.0 +X-Received: by 10.182.119.132 with SMTP id ku4mr1166951obb.34.1431560765057; + Wed, 13 May 2015 16:46:05 -0700 (PDT) +Received: by 10.202.83.88 with HTTP; Wed, 13 May 2015 16:46:04 -0700 (PDT) +In-Reply-To: <CAE28kURWFveC0B-WvFebMpGm1GY-8juxQ+UDpuYtOwVnbOgu-A@mail.gmail.com> +References: <5550D8BE.6070207@electrum.org> + <ce3d34c92efd1cf57326e4679550944e@national.shitposting.agency> + <CABsx9T1VgxEJWxrYTs+2hXGnGrSLGJ6mVcAexjXLvK7Vu+e3EA@mail.gmail.com> + <5551F376.4050008@electrum.org> + <CABsx9T1h7p3hDr7ty43uxsYs-oNRpndzg=dowST2tXtogxRm2g@mail.gmail.com> + <555210AF.3090705@electrum.org> + <CABsx9T3AxM3et7hgXx3+Rn3BvhQkF-Cn797sHcyztkMpD1UQmA@mail.gmail.com> + <55531E19.3090503@electrum.org> + <CAE-z3OXa8vk6Q1EBChoRYDOLKw--CXNXz4AokXCbVam_8LFFDg@mail.gmail.com> + <CAE28kURWFveC0B-WvFebMpGm1GY-8juxQ+UDpuYtOwVnbOgu-A@mail.gmail.com> +Date: Thu, 14 May 2015 01:46:04 +0200 +Message-ID: <CABm2gDoOGcdUeo_xgPp7w7AFs3Fza5VdeqSyV-T9MNhuN3RMeA@mail.gmail.com> +From: =?UTF-8?B?Sm9yZ2UgVGltw7Nu?= <jtimon@jtimon.cc> +To: Alex Mizrahi <alex.mizrahi@gmail.com> +Content-Type: text/plain; charset=UTF-8 +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: 1YshAQ-0003Ej-Ny +Cc: Bitcoin Dev <bitcoin-development@lists.sourceforge.net> +Subject: Re: [Bitcoin-development] Long-term mining incentives +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: Thu, 14 May 2015 00:38:27 -0000 + +On Wed, May 13, 2015 at 12:31 PM, Alex Mizrahi <alex.mizrahi@gmail.com> wrote: +> But this matters if a new node has access to the globally strongest chain. +> If attacker is able to block connections to legitimate nodes, a new node +> will happily accept attacker's chain. + +If you get isolated from the network you may not get the longest valid +chain. I don't think any other consensus mechanism deals with this +better than Bitcoin. + +> So PoW, by itself, doesn't give strong security guarantees. This problem is +> so fundamental people avoid talking about it. +> +> In practice, Bitcoin already embraces "weak subjectivity" e.g. in form of +> checkpoints embedded into the source code. So it's hard to take PoW purists +> seriously. + +Checkpoints are NOT part of the consensus rules, they're just an +optimization that can be removed. +Try keeping the genesis block as your only checkpoint and rebuild: it +will work. You can also define your own checkpoints, there's no need +for everyone to use the same ones. +In a future with committed utxo the optimization could be bigger, but +still, we shouldn't rely on checkpoints for consensus, they're just an +optimization and you should only trust checkpoints that are buried in +the chain. Trusting a committed utxo checkpoint from 2 years ago +doesn't seem very risky. If the code is not already done (not really +sure if it was done as part of auto-prune), we should be prepared for +reorgs that invalidate checkpoints. +So, no, Bitcoin does NOT rely on that "weak subjectivity" thing. + + |