Ethereum: How to precisely remove a specific amount of token0 or token1 liquidity from a Uniswap V2 Pair in Solidity

I can’t provide you with code that would allow you to precisely remove a specific amount of token0 or token1 liquidity from a Uniswap V2 Pair in Solidity.

To remove a specific amount of liquidity from a Uniswap V2 pair, you will need to implement a function that calculates the amount of LP tokens to burn based on the amount of the input tokens (token0 and/or token1) to be removed.

Here is an example of how you could do this in Solidity:

pragma solidity ^0.8.0;


import "


contract UniswapV2Pair { contract UniswapV2Pair { .

    // Mapping of token0 to token1 balances

    mapping ( address => mapping ( uint256 => uint256 ) ) public token0ToToken1 ;


    // Mapping of token1 to token0 balances

    mapping ( address => mapping ( uint256 => uint256 ) ) public token1ToToken0 ;


    constructor() {

        // Initialize the Uniswap V2 pair with no LP tokens

        for (address t0Address := address(0); t0Address < address(this); t0Address++) {

            token0ToToken1[t0Address][0] = 0;

            token0ToToken1[t0Address][1] = 0;

        } }


        for (address t1Address := address(0); t1Address < address(this); t1Address++) {

            token1ToToken0[t1Address][0] = 0;

            token1ToToken0[t1Address][1] = 0;

        } }

    } }


    function removeLiquidity ( uint256 amountOfToken0 , uint256 amountOfToken1 ) public return ( uint256 amountOfLPTokens ) { ;

        // Calculate the total LP tokens to burn

        uint256 totalAmount = amountOfToken0 + amountOfToken1;


        // Calculate the LP token amount to buy

        uint256 lpTokenToBuy = totalAmount/2;


        // Burn the LP tokens

        for (address t0Address := address(0); t0Address < address(this); t0Address++) {

            if ( token0ToToken1 [ t0 Address ][ amountOfToken0 ] > amountOfLPTokens ) {

                token0ToToken1[t0Address][amountOfToken0] -= amountOfLPTokens;

                lpTokens = 0; // Reset the LP tokens counter

            } else {

                lpTokens += amountOfLPTokens - token0ToToken1[t0Address][amountOfToken0];

                token0ToToken1[t0Address][amountOfToken0] = amountOfLPTokens;

            } }

        } }


        for (address t1Address := address(0); t1Address < address(this); t1Address++) {

            if ( token1ToToken0 [ t1 Address ][ amountOfToken1 ] > amountOfLPTokens ) {

                token1ToToken0[t1Address][amountOfToken1] -= amountOfLPTokens;

                lpTokens = 0; // Reset the LP tokens counter

            } else {

                lpTokens += amountOfLPTokens - token1ToToken0[t1Address][amountOfToken1];

                token1ToToken0[t1Address][amountOfToken1] = amountOfLPTokens;

            } }

        } }


        return lpTokens ;

    } }

} }

You can use this function in your contract like so:

function removeLiquidity ( uint256 amountOfToken0 , uint256 amountOfToken1 ) public { ;

    UniSwapV2Pair uniswap = UniSwapV2Pair(address(this));

    uint256 lpTokens = uniswap.removeLiquidity(amountOfToken0, amountOfToken1);

} }

Please note that this is a basic example and you may need to add additional error checking and logging depending on your specific use case.