anyone knows how can i get position of a function parameter in memory in yul?

calldataload(0) -> first 32 bytes, calldataload(1) -> next 32 bytes

i can create a full fledged example if you want ?

i already figuered it out but got another problem, why does my keccak not work, i am trying to get the value of proj_id_to_params mapping

i am copying the value to memory slot 0 and taking keccak256(0, 0x20) which should be the keccak of key of the mapping however it doesn’t work

i'll check it out

oh wait why are you storing map slot in memory?

when i am declaring a parameter in a function it means that it will be in calldata right?

so when i say calldatacopy(0, 4, 0x20) => i am copying my only parameter to memory at slot 0

and i already tested the thing and it works, the problem occurs only when i take the keccak, that is why i am asking why do you do keccak of key + slot of mapping

The value corresponding to a mapping key k is located at keccak256(h(k) . p) where . is concatenation and h is a function that is applied to the key depending on its type

What is concatenation

omg it worked

thanx mrt