From: Rafael Brune <mail@rbrune.de>
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: quoted-printable
Message-Id: <63B3BF21-C487-4D62-8BB8-18C90F2C3F4C@rbrune.de>
Date: Sun, 17 Nov 2013 17:43:14 +0100
To: bitcoin-development@lists.sourceforge.net
Mime-Version: 1.0 (Mac OS X Mail 7.0 \(1822\))
Subject: [Bitcoin-development] Bitcoin Network Simulator
Precedence: list

Over the last days I spent some time working on a simple Bitcoin network =
simulator.
It is a stochastic event-based continuous-time simulation of Bitcoin =
miners
exchanging messages and building block chains. It simulates latency, =
bandwidth=20
and also verification speed but it currently does not simulate =
propagation/inclusion
of transactions and instead uses random block sizes.

The simulator includes two examples, one for a 51% attack and the other =
is an
implementation of selfish mining (pretty much 1:1 as described in the =
paper).
With the random parameters I picked it seems like it pays off to mine =
selfish with
>=3D30% of the hashing power - but take this with a huge grain of salt =
as this
is with a very small network and randomly chosen parameters. And of =
course it
is not a perfect replica of the real world network.

Since this is based on my understanding of the Bitcoin network and =
protocol it
would be great if others would take a look and help improve it.

The project can be found on my github:
https://github.com/rbrune/btcsim

Regards,
 Rafael Brune=