While we're on topic. Keccak random does only produce numbers right? Never tried with anything else but is there any way to convert to say a randomly generated address or bool value?

bool should be easy right?

I mean literal bool, I usually just limit returns to either 1 or 0 to simulate bool

keccack => uint256 => uint160 => address

How would I implement this? Just add uint160 and address to the argument "keccak(uint256(uint160(address(..))"?

Inside out

Its in the uni v2 pair address prediction

uint256=>uint160 may revert though

keccak random?

It won't, compiler will truncate accordingly

This depends on he version of solidity you are using and on the number

Yeah its for the latest

Older versions supported direct uint to address

If you do uint160(type(uint256).max) pretty sure it reverts on last version of solidity

This is what I use in updated uni v2 code

// calculates the CREATE2 address for a pair without making any external calls
function pairFor(address factory, address tokenA, address tokenB) internal pure returns (address pair) {
(address token0, address token1) = sortTokens(tokenA, tokenB);
pair = address(uint(keccak256(abi.encodePacked(
hex'ff',
factory,
keccak256(abi.encodePacked(token0, token1)),
hex'96e8ac4277198ff8b6f785478aa9a39f403cb768dd02cbee326c3e7da348845f' // init code hash
))));
}


This ones from the original code, used to work on solc 0.6

Mhh yeah just tried on remix, I remembered wrong

Breaking changes are a bitch

btw that's not a way to test if that would break

pragma solidity >=0.8.0 <0.9.0;

contract Test {

function test() public pure returns(uint160) {
return uint160(type(uint256).max);
}

function test2() public pure returns(uint160 result) {

unchecked{ result=uint160(type(uint256).max);}
}

}

this answers the question without doubts

or this. wtf!

bbb
Text
bbb

Instead of b put the magical char I put above