Mr. Finney replied to Nakamoto’s Jan. 9, 2009, announcement that he had launched bitcoin, and for the next two weeks he worked with the founder to debug the system and get it running properly. Mr. Finney became a key contributor, the first person to work with Nakamoto, to run the bitcoin software, and the first to receive a transfer of bitcoin.
The conversations between the men are wholly dedicated to setting up the bitcoin network, and are very technical in nature. In that sense, they don’t shed a tremendous amount of light on Nakamoto. But they do give some measure of the man, and they do open a window into bitcoin’s earliest days.
Mr. Finney downloaded version 0.1.0 – and it crashed, which surprised Nakamoto who’d been testing the system himself and hadn’t had any crashes. But he managed to reproduce the bug, and the faulty code that caused it. “It was absolutely the last piece of code to go in,” he wrote. “I’m really dismayed to have this botch up the release after all that stress testing.” It’s one of the few displays of emotion from him in the emails.