On Wed, May 15, 2013 at 07:38:27AM -0400, Peter Todd wrote: > So I'm offering 2BTC for anyone who comes up with a nice and easy to use > command line tool that lets you automagically create one version of the > transaction sending the coins to the desired recipient, and another > version sending all the coins back to you, both with the same > transaction inputs. In addition to creating the two versions, you need > to find a way to broadcast them both simultaneously to different nodes > on the network. One clever approach might be to use blockchain.info's > raw transaction POST API, and your local Bitcoin node.
Oh, and while we're at it, a good starting point for your work would be Gavin's spendfrom utility in the contrib/spendfrom directory in the Bitcoin-QT respository. Also please do keep in mind that it's much better for the community if an attack is demonstrated first, followed by releasing the code some time later. -- 'peter'[:-1]@petertodd.org
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