Challenge lesson 8, can't access

[usereri]

Hi all,
I am trying to get my hands on challenge from lesson 8 but it is not opening (the link for ipfs site is not working). I tried to get the contract address from NFT factory contract but when I try to enter index 7 to getChallenge function it returns not published/verified contract which doesn't help :(

Could anyone tell me how you approached this challenge?

Thanks in advance!
Eri

[EngrPips]

Hello @usereri , after i carefully read and study the transactions that have been sent to the contract address of the lesson 8 challenge, i realize that you just have to call the solveChallenge method on the contract address [0xf215a0b6DD88d6029b5385D6fab51968337E963D] of the challenge. Yea the contract isn't verified on etherscan so you won't have the luxury of just calling the method by clicking on some button on a user interface. So you would have to do a low level call by using contractAddress.call(callData) the solveChallenge method takes two argument as shown below

As you can see in the above image the first argument is a uint256 and the second argument is of type string which is your twitter handle. I have noticed every person that successfully call the solveChallenge method on the contract address [0xf215a0b6DD88d6029b5385D6fab51968337E963D] have always passed in 123456789 as the uint256 value and their twitter handle as the string. You can send the transaction using a foundry script if you will.

I hope you have hint on about how to solve the challenge now

[blockcipherdev]

The contract address in the constants.js file needs to be updated to 0xf215a0b6DD88d6029b5385D6fab51968337E963D.

https://ipfs.io/ipfs/QmUgc1xpNgTMwSF2GBS5FTFKmSdrmSnLJD5DoYZtcQ2n5X/ -> constants.js points to a different smart contract. Gas estimation will always fail.

You can download the files locally, edit the sepoliaAddress to 0xf215a0b6DD88d6029b5385D6fab51968337E963D and run on a local server.

Fun fact: Index for this challenge (Lesson 8) is 11. :)

[EngrPips]

Wow seriously?

[usereri]

I was able to solve that challenge through cast module in foundry.

[EngrPips]

Interesting

[blockcipherdev]

As per my understanding, the lesson objective is to call the contract function using a HTML front end.

[blockcipherdev]

[EngrPips]

Hello @blockcipherdev, Do you have any problem at all here?