Impossible to send approve without ETH for gas

[99hops]

@lessmore92 Hello mate, you state that by

//by this method we allow $myapp_address to send upto 99999 token behalf of $owner_address
$approve_tx    = $token->approve($owner_address, $myapp_address, 99999);
$approve_tx_id = $approve_tx->sign($owner_private)
                            ->send()

$owner_address allows $myapp_address to send some USDT amount to any address without $owner_address having anything but USDT in his wallet.

Well how is this possible to work while for approve() to work you have to send a transaction which needs gas (ETH)?

I tried with account only having token inside and got

message: "insufficient funds for transfer"
code: -32000

Here is a TX on etherscan showing the exact approve() method called that costs $31 :smiley:

[lessmore92]

Hi, approve is a transaction that needs to be paid a fee. Yes, for the approve method you need to pay the fee from the owner's address. So for the first transaction that does the approve, address needs to have some ETH for gas.

[99hops]

I agree, just wanted to point this out, thanks :beers: !

[lessmore92]

Thank you, I will update the doc.