Any bitcoin-QT since 2012 idiot.
Nope wrong. There are none. If you can find one thats available right now I'll pay you 1BTC. I'm putting my money where my mouth is.
Oficiall bitcoin-QT will correctly identify spent coins even if tx id is modified by third party.
You can download from here:
https://bitcoin.org/en/downloadYou can send 1 BTC to 1ZePhramiDqjYJzqiyUFaY5qhz5k4unRC
If you want some background of my claim:
http://www.cryptocoinsnews.com/2014/02/10/mt-gox-blames-bitcoin-core-developer-greg-maxwell-responds/Not that Bitcoin-QT handles Malleability fantastically – but because it tracks inputs it will still detect the mutant transactions. An interesting point which I haven’t pointed out elsewhere is that for the question of basic funds safety in re-issuing a transaction malleablity is basically irrelevant.
Say you pay someone and it doesn’t go through (or it does and you don’t see it because its been mutated and your software can’t detect that), and they ask you to reissue…. if you reissue without double-spending any of the original inputs you are at risk of getting robbed. This is true with or without malleability. Without the double-spend of at least one input the original transaction could just go through in addition to your reissue.
Say that you do make sure to double spend at least one input – then the result is funds safe safe, regardless of if a mutation happened.
Say you want to support _canceling_ a payment (send me the goat instead!) rather than reissue you still must double-spend the attempted payment to cancel it, since it still might go through if you don’t. And the double spend works to protect this case regardless of if the transaction was mutated.
For support and accounting purposes you absolutely do need tools to identify mutated transactions, so long as mutation exists… so we ought to provide some better tools there. But I can’t think a case where mutation handling is necessary or sufficient for cancellation security, but – rather – input tracking appears to be both necessary and sufficient in all cancellation cases.
This helps explain why Bitcoin-QT – whose mutation handling kinda stinks – doesn’t ever end up in a really bad situation with mutants: it tracks inputs pretty well.
