A_Blockchain_Challenge

I heard proof of stake was the new cool thing, so i converted my PoW blockchain over to PoS.

Can you double check that the system works ok?

Due to an unintended bug, we had to upload a new handout. Below is the diff with the old handout.

diff --git a/chal.py b/chal.py --- a/chal.py +++ b/chal.py @@ -157,6 +157,8 @@ if name == "main": if not check_ticket(winner_name, i): print("why did you submit an invalid ticket?") exit() + else: + break elif command == "win": name, sig = input("win claim (name sig):").split() verify_win((name, int(sig)))