function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
// approve token transfer to cover all possible scenarios
_approve(address(this), address(pancakeswapV2Router), tokenAmount);

// add the liquidity
pancakeswapV2Router.addLiquidityETH{value: ethAmount}(
address(this),
tokenAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
owner(),
block.timestamp
);

// //xiugai
// // approve token transfer to cover all possible scenarios
// _approve(address(this), address(pancakeswapV2Router), tokenAmount);

// arbToken.approve(address(pancakeswapV2Router), ethAmount);

// // add the liquidity
// pancakeswapV2Router.addLiquidity(
// address(this),
// address(arbToken),
// tokenAmount,
// ethAmount,
// 0, // slippage is unavoidable
// 0, // slippage is unavoidable
// owner(),
// block.timestamp
// );
}

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