FumbleChain: A Purposefully Vulnerable Blockchain
We developed FumbleChain so that you, people who are interested in Blockchain security can learn about Blockchain and hack a purposefully vulnerable Python3 blockchain named FumbleChain.
While the goal of FumbleChain is to be a tool for learning about Blockchain security in a simple and fun way, please note that there may be some bugs that we didn't catch ourselves. Play the game and do not try to exploit the framework itself. That would ruin all the fun.
If a challenge is too tough, you can reveal a hint. But only use it if you're stuck! Going through related lessons once more may help as well.
Please read the FAQ for more information. The answer to your questions may very well be there.
When running this software on your own machine, you may expose yourself to attacks. We cannot guarantee that the software is bug-free. Upon starting the FumbleStore, various background services are started. These services will listen for incoming connections on multiple TCP ports. Proceed with caution and make sure your firewall rules are properly set.