✅MetaToken
Last updated
Last updated
It is hard to write a detailed writeup for this chall so I will just summarize the idea here...
This is a read-only reentrancy chall that mimics the curve finance hack:
The callback is here:
At this point the LP tokens are burned so totalSupply decreases, therefore get_virtual_price() returns higher price than expected:
In the callback we can purchase MetaToken. We can buy a lot more because the LP tokens we still hold are more valuable in the callback. Once control flow exits our fallback function we can dump everything and profit.
