how much gas would it cost to update storage from zero to non-zero then from non-zero to zero after? How would gas refunds work? 🤔 (in same tx)

Example?

uint256 private inStorage;

function set() {
inStorage = 1;
delete inStorage;
}

20k for sload, 15k refund for sclear. So 5k?

does the new refund EIP affect that?

Yellow paper haven't been updated yet, so not sure

one sec, i'll think i'll test it

just make your own multi sender contract

It was supposed to be included in london fork

You mean fork it

function multiSend(IERC20 token, uint256[] memory amounts, address[] memory addresses) external {
for (uint256 i; i < addresses.length; i++) {
token.transferFrom(_msgSender(), addresses[i]. amounts[i];
}
}

something like that

and you don't need to pay a fee

:S

it cost 14k

when i tested

35k - 21k

https://rinkeby.etherscan.io/tx/0xb037c5caa8b35e5702b9dc33bea597495c43f96dab138ee4fefea6827c85366b

on rinkeby

ouch, thats a lot of gas

in berlin that cost 2k gas

lol

Is Berlin a public testnet ?

before london

the update was berlin

Oh ok now we are on London mainnet

yes, we are on london currently

That's wierd

ye, thats what I was thinking

https://rinkeby.etherscan.io/tx/0x1c254366ed7f9501d02dc46919c51570d96c67df6af596ac97285ec63a37d2bf

2k for me

same one?

ohh

I didn't use optimizer

Sorry, forgot about that

yeah true, its 2k with optimizer

Can confirm. Without opt, its taking 35k😅

No callable value provided, will throw an error in remix

wrote it on telegram

function multiSend(IERC20 token, uint256[] memory amounts, address[] memory addresses) external {
for (uint256 i; i < addresses.length; i++) {
token.transferFrom(_msgSender(), addresses[i]. amounts[i];
}
}

this works

Do you have any idea of how much gas will it cost

depends on token

For example let the token be usdt

30 - 40k

Now can you say

Ok

per transfer