# PancakeSwap charges a fee to mint LP according to their code?

I am looking at the PancakeSwap contract for LP's and I noticed they charge a fee for creating LP's. No where in their documentation does it say there is a fee for depositing liquidity. What is PancakeSwap doing here? Are they giving themselves LP tokens only if I over deposit Token 0 (amount0) relative to Token 1 (amount1) in the below line of code?

``````liquidity = Math.min(amount0.mul(_totalSupply) / _reserve0, amount1.mul(_totalSupply) / _reserve1);

``````

BSC Contract: 0xddE420cbB3794ebD8FFC3Ac69F9c78e5d1411870 `````` // if fee is on, mint liquidity equivalent to 8/25 of the growth in sqrt(k)
function _mintFee(uint112 _reserve0, uint112 _reserve1) private returns (bool feeOn) {
uint _kLast = kLast; // gas savings
if (feeOn) {
if (_kLast != 0) {
uint rootK = Math.sqrt(uint(_reserve0).mul(_reserve1));
uint rootKLast = Math.sqrt(_kLast);
if (rootK > rootKLast) {
uint numerator = totalSupply.mul(rootK.sub(rootKLast)).mul(8);
uint liquidity = numerator / denominator;
if (liquidity > 0) _mint(feeTo, liquidity);
}
}
} else if (_kLast != 0) {
kLast = 0;
}
}

// this low-level function should be called from a contract which performs important safety checks
function mint(address to) external lock returns (uint liquidity) {
(uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
uint amount0 = balance0.sub(_reserve0);
uint amount1 = balance1.sub(_reserve1);

bool feeOn = _mintFee(_reserve0, _reserve1);
uint _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee
if (_totalSupply == 0) {
liquidity = Math.sqrt(amount0.mul(amount1)).sub(MINIMUM_LIQUIDITY);
_mint(address(0), MINIMUM_LIQUIDITY); // permanently lock the first MINIMUM_LIQUIDITY tokens
} else {
liquidity = Math.min(amount0.mul(_totalSupply) / _reserve0, amount1.mul(_totalSupply) / _reserve1);
}
require(liquidity > 0, 'Pancake: INSUFFICIENT_LIQUIDITY_MINTED');
_mint(to, liquidity);

_update(balance0, balance1, _reserve0, _reserve1);
if (feeOn) kLast = uint(reserve0).mul(reserve1); // reserve0 and reserve1 are up-to-date
emit Mint(msg.sender, amount0, amount1);
}
``````  