        // mint the position
        (tokenId, liquidity, amount0Minted, amount1Minted) = Base.UNI_POSITION_MANAGER.mint(
            INonfungiblePositionManager.MintParams({
                token0: params.token0,
                token1: params.token1,
                fee: params.fee,
                tickLower: params.tickLower,
                tickUpper: params.tickUpper,
                amount0Desired: params.amount0ToMint,
                amount1Desired: params.amount1ToMint,
                amount0Min: params.amount0Min,
                amount1Min: params.amount1Min,
                recipient: address(this),
                deadline: block.timestamp
            })
        );
(amount0, amount1) = pool.mint(
	params.recipient,
	params.tickLower,
	params.tickUpper,
	liquidity,
	abi.encode(MintCallbackData({poolKey: poolKey, payer: msg.sender}))
);

require(amount0 >= params.amount0Min && amount1 >= params.amount1Min, 'Price slippage check');
// increase liquidity via position manager
(liquidity, amount0Added, amount1Added) = Base.UNI_POSITION_MANAGER.increaseLiquidity(
	INonfungiblePositionManager.IncreaseLiquidityParams({
		tokenId: tokenId,
		amount0Desired: amount0,
		amount1Desired: amount1,
		amount0Min: 0,
		amount1Min: 0,
		deadline: block.timestamp
	})
);
    function decreaseLiquidity(uint256 tokenId, uint128 liquidity) internal returns (uint256 amount0, uint256 amount1) {
        (amount0, amount1) = Base.UNI_POSITION_MANAGER.decreaseLiquidity(
            INonfungiblePositionManager.DecreaseLiquidityParams({
                tokenId: tokenId,
                liquidity: liquidity,
                amount0Min: 0,
                amount1Min: 0,
                deadline: block.timestamp
            })
        );
    }
