Fail with error 'SafeERC20: ERC20 operation did not succeed'

Smart Contracts
1

Hello,
I try to withdraw matic tokens from my smart contract, that I deployed on mumbai testnet.
My withdraw functions looks like this:

function withdrawOnlyOwner(address token) public onlyOwner {
        IERC20 token_transfer = IERC20(token);
        uint256 transfer_amount = balance(token);
        require(transfer_amount > 0, "Balance too low");
        SafeERC20.safeTransfer(token_transfer, owner, transfer_amount);
        emit Withdrawal(owner, transfer_amount);
    }

balance is a public function that works correctly, I get the balance of the token I put the address in.

If I run the .js code snippet to withdrwa all funds from the contract, the code works correctly. But I do not get the tokens and if I do have a look at the transaction [here].(https://mumbai.polygonscan.com/tx/0xceada0fe6fa8ffe95d90e033c9bb221dc3ce8907408510871424147f4ca91933)
Does someone have an idea what is going wrong here?

2

Dear @Dani92
If possible, could you share whole codebase of your smart contract?
Kind regards.

3

Hi, welcome to the community! :wave:

I am not sure for your Matic token, but is it an original coin, just like ETH, use it as gas fee, or a token, just like DAI? I tend to think it is just like ETH, so maybe you can not use SafeERC20.safeTransfer, just recipientAddress.transfer(amount)

4

Yes it is the main token on polygon (0x0000000000000000000000000000000000001010). It should be the same like eth on ethereum. But why should this not work with safeTransfer? Thats what I don't understand.

5

What is balance(token) ?