I have a question about one of the unit tests for bulletproofs:

the "invalid_gamma_0" test seems to also use an invalid amount (from a previous test). why? what are we testing?

Indeed. I also seem to remember a conversation that said a 0 gamma isn't actually invalid. I'll change it to whatever sarang confirms should be invalid/invalid.

0 is a valid gamma value

But is unlikely to be chosen at random :)

Thanks, I'll remove it then.