How to withdraw PART of the Smart Contract's balance into an account?

Question

I have looked through many similar questions but they only address transferring the entirety of the smart contract's balance to the personal account, and it is done like this:

msg.sender.transfer(address(this).balance);

What I am trying (and failing) to figure out is how to transfer part of the balance. Eg. If the contract contains 3 ether, I only want to transfer 1. And I want to be able to specify the amount to be transferred every time I use the function. I am not posting my code because nothing I have tried works and it is pretty much guesswork.

Thank you for any help.

score 1 · Accepted Answer · answered Sep 25 '19 at 18:48

1

function withdraw(uint amount) public {
    msg.sender.transfer(amount);
}

Withdraws the amount specified with amount variable. No need to check the total balance of the contract because if you try to withdraw more than total balance it will revert.

answered Sep 25 '19 at 18:48

Ferit

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it would be a good practice to check if contract has that amount of token before transferring. – Iftifar Taz Sep 26 '19 at 04:15
"it would be a good practice to check if contract has that amount of token before transferring" Why? – user94559 Sep 26 '19 at 04:21
I mean write a require statement. So in case of error save some gas – Iftifar Taz Sep 26 '19 at 04:42
I suppose it depends on what the function is doing. – user94559 Sep 26 '19 at 05:21

score 0 · Answer 2 · edited May 24 '22 at 00:56

0

As Iftivar Taz mentioned if you are practicing to try msg.sender.transfer(amount). Try it with amount of 0 and it will probably work. Obviously your practicing contract won't have more than zero eths.

edited May 24 '22 at 00:56

ChrisGPT was on strike

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answered May 23 '22 at 23:29

Mohamad javad Safari

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How to withdraw PART of the Smart Contract's balance into an account?

2 Answers2