Can anyone help what is the cryptocurrency that has the option to revoke (or something like that) a transaction if the second party in the transaction did not fulfill his trade?

I read that type of cryptocurrecy before but I can't remember what was that coin....
I believe I read that in this forum website.

Thanks in advance for any replies.

Who do you think is Satoshi Nakamoto?

If you have no idea you can start here:
https://en.wikipedia.org/wiki/Satoshi_Nakamoto

Or just immediately vote at the poll if you don't want to read the wiki.

I just want to give some notes that Gavin Andresen, one of the very first Bitcoin software developer, and John Matonis, one of Bitcoin founders and currently Executive Director of the Bitcoin Foundation must knew Satoshi Nakamoto. Those two, of course, are not Satoshi Nakamoto.