Challenge "Motorbike" currently not working

[juanschallibaum]

Challenge "Motorbike" currently not working

[GianfrancoBazzani]

Hey guys, the level is still solvable! checkout this Log

@juanschallibaum If you figure out how to solve it and want to contribute, you could write some hints and explain the workaround in the level text box.

[0xGh-st]

@GianfrancoBazzani I think, it seems like you've used Ethernaut.sol to destroy the Engine. This is because, in order to destroy the Engine, the creation and destruction of the Engine need to be handled in a single transaction. So, ultimately, you weren't able to clear the level with the actual player account; instead, the attacking contract took on the role of the player to resolve it, right? I would like to clear it with the actual player account.

[GianfrancoBazzani]

Hi @juanschallibaum thanks for highlight it!

I suspect this is related to the Dencun fork already introduced in most of test networks and the "EIP-6780: SELFDESTRUCT only in the same transaction". You can learn more about through reading Ethereum Evolved: Dencun Upgrade Part 1, EIP-5656 & EIP-6780 Consensys Blog Post.

We will figure out how to address this issue, thank you!

[juanschallibaum]

Thank you @GianfrancoBazzani for the explanation and quick response!

Perhaps a mention of the EIP could be added in the challenge description, clarifying that since its introduction, the selfdestruct() in this context is ineffective. Perhaps the above could be clarified, and when validating the instance, check in some way the attempt of selfdestruct() on the logic contract (whose bytecode is reset). Although the attack is no longer possible, the challenge still seems educational and informative, and it would be good to keep it. Perhaps there is an even better way to solve the level's issue.

Whatever you need, I am at your disposal. Thanks again, regards.

[tobecoder007]

Hey @juanschallibaum

Is there a new attack to bypass the level or is it unsolvable for now ?

[0xGh-st]

@GianfrancoBazzani How did you solve this level????? Pleas tell me...