TRANSFER_FROM_FAILED Adding New Pool to Uniswap

Question

I created a new ERC20 token and I'm trying to create a new pool ETH pair with my token on Uniswap V2. However, when I get to the last step on Uniswap and press "Add" it doesn't do anything. When I look at my browser console I see the following errors:

Object { code: -32603, message: "execution reverted: TransferHelper: TRANSFER_FROM_FAILED", data: {…} }

and I also get

Error: cannot estimate gas; transaction may fail or may require manual gas limit

Can anyone help me? My contract can be found here: https://etherscan.io/address/0x0c6891f1bbc03805585d70b2170d9e84dbceee00#code#L646

Answer 1

In my TransferFrom function I added the following and it resolved my issue.

if (currentAllowance != type(uint256).max) 
{
    require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
    
    unchecked
    {
        _approve(sender, _msgSender(), currentAllowance - amount);
    }
}

Answer 2

You can try by approving the contract and then do TranasferFrom().