I'd like to forward the gas fee of this tx to my gnosis safe:
function withdraw() external onlyOwner {
payable(vault).transfer(address(this).balance);
}
Note: vault is the Gnosis Safe address.
Is this possible ?
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What do you mean forward? Make the gnosis safe pay for the tx fee?– MeetCommented Mar 13, 2022 at 19:01
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Yes. But also it seems like my problem is related to eip-2929: help.gnosis-safe.io/en/articles/…– eightyfiveCommented Mar 13, 2022 at 21:32
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3 Answers
use vault.call{value: address(this).balance}('') to forward the call with the full gas. Otherwise, it can be specified via vault.call{value: address(this).balance, gas: 50000}('') for example.
I'm pretty sure the only way to "forward" gas costs is to delete a bunch of stored data. (gas rebate tokens)
Update
IGNORE my answer. It’s not correct, I got confused, see comments.
Original
So you can make an address pay for the Tx gas fee by using payable().
payable(vault).transfer(address(this).balance);
Here the vault (Gnosis safe address) will pay for the Tx gas fee.
This requires setting up a Spending limit for the smart contract sending the funds.
Be careful though !
EIP-2929 broke contract to contract transfer for Gnosis safes. And you have to use EIP-2930 accessList to go around the new limitation.
More details about that here.
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Be careful, payable by itself doesn't pay transaction fees. The whole thing
payable(vault).transfer(address(this).balance)transfers any existing balance to the vault contract. It doesn't pay any transaction fee.– Ismael ♦Commented Mar 17, 2022 at 5:00 -
Ok thanks. I got confused in the stress of the moment then. So you confirm that the Tx fee is paid by the account calling the smart contract method (in that case owner) ? Commented Mar 17, 2022 at 8:39
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1The transaction fees are always paid by the transaction's signer account.– Ismael ♦Commented Mar 17, 2022 at 14:19