Received-SPF: pass (sog-mx-4.v43.ch3.sourceforge.com: domain of gmail.com
	designates 209.85.160.177 as permitted sender)
	client-ip=209.85.160.177; envelope-from=gavinandresen@gmail.com;
	helo=mail-yk0-f177.google.com; 
MIME-Version: 1.0
In-Reply-To: <CAC1+kJMxjNReSMxm=vDB-iYyXTqBvXq5_aw0Z3onds0zF-Oq=w@mail.gmail.com>
References: <CAC1+kJMrpx0tyE8d0wkwjBthhSPMCdr=9LrJHQFTF4G1vg4MAg@mail.gmail.com>
	<CABsx9T1HGwozy8pY+iStGZPmjenu0RQBVdtOy5ibiWG0BM4mZw@mail.gmail.com>
	<CAC1+kJPvzxsSDg3joraZbv_r1RroK9d6-v9O_15g6S7B46TwQg@mail.gmail.com>
	<CANEZrP3s9SpBWxLYMvF5cLK4UeKS2SdKOLpNr40NKGoAzh=3nw@mail.gmail.com>
	<CAC1+kJMxjNReSMxm=vDB-iYyXTqBvXq5_aw0Z3onds0zF-Oq=w@mail.gmail.com>
Date: Thu, 17 Apr 2014 13:07:48 -0400
Message-ID: <CABsx9T23Upk+eAaHa_dPa1hQEZO1RPRMv7HfiLzbSrR14Z+NSg@mail.gmail.com>
From: Gavin Andresen <gavinandresen@gmail.com>
To: =?UTF-8?B?Sm9yZ2UgVGltw7Nu?= <jtimon@monetize.io>
Content-Type: multipart/alternative; boundary=20cf3011dd8597e92e04f7401245
Cc: Bitcoin Dev <bitcoin-development@lists.sourceforge.net>
Subject: Re: [Bitcoin-development] Timed testing
Precedence: list

--20cf3011dd8597e92e04f7401245
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

On Thu, Apr 17, 2014 at 12:09 PM, Jorge Tim=C3=B3n <jtimon@monetize.io> wro=
te:

> So it seems a new mode only makes sense if the -private mode makes
> sense, which in turn only makes sense to include in bitcoind if it's
> useful enough for the network attack simulations, which remains the
> open question.
>

Unless I misunderstood what your private mode does, you can get the same
effect with -regtest by just controlling nodes connectivity. For example:

Start 2 nodes, connected to each other. Mine a -regtest chain they both
agree on.

Restart them so they're not connected.  Have one mine normally,
have the other  mine... however you like to simulate some attack (deep
chain re-org, double-spend,
whatever).

To simulate launching the attack, connect them together again, let the two
chains compete and see
what happens.

--=20
--
Gavin Andresen

--20cf3011dd8597e92e04f7401245
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_extra"><div class=3D"gmail_quote">On T=
hu, Apr 17, 2014 at 12:09 PM, Jorge Tim=C3=B3n <span dir=3D"ltr">&lt;<a hre=
f=3D"mailto:jtimon@monetize.io" target=3D"_blank">jtimon@monetize.io</a>&gt=
;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex"><div class=3D"HOEnZb"><div class=3D"h5"><spa=
n style=3D"color:rgb(34,34,34)">So it seems a new mode only makes sense if =
the -private mode makes</span><br>
</div></div>
sense, which in turn only makes sense to include in bitcoind if it&#39;s<br=
>
useful enough for the network attack simulations, which remains the<br>
open question.<br>
</blockquote></div><br>Unless I misunderstood what your private mode does, =
you can get the same</div><div class=3D"gmail_extra">effect with -regtest b=
y just controlling nodes connectivity. For example:</div><div class=3D"gmai=
l_extra">
<br></div><div class=3D"gmail_extra">Start 2 nodes, connected to each other=
. Mine a -regtest chain they both agree on.</div><div class=3D"gmail_extra"=
><br></div><div class=3D"gmail_extra">Restart them so they&#39;re not conne=
cted. =C2=A0Have one mine normally,</div>
<div class=3D"gmail_extra">have the other =C2=A0mine... however you like to=
 simulate some attack (deep chain re-org, double-spend,</div><div class=3D"=
gmail_extra">whatever).</div><div class=3D"gmail_extra"><div><br></div><div=
>To simulate launching the attack, connect them together again, let the two=
 chains compete and see</div>
<div>what happens.</div><div><br></div><div>--=C2=A0<br></div>--<br>Gavin A=
ndresen<br>
</div></div>

--20cf3011dd8597e92e04f7401245--