Get pair reserves on Uniswap and Sushiswap using the same contract in Remix

Question

i created a contract in Remix to get the reserves of a pair on Uniswap, and it works fine, but when i try to do the same thing using the Sushiswap factory address the function gives me a "LiquidityValueCalculator.pairInfo errored: execution reverted" error. Up to now using other contracts i have created a pair and added/removed liquidity in Uniswap and Sushiswap by changing only the factory address, but when it comes to get reserves it doesn't work. Where am i wrong?

Addresses used:

UniswapV2Factory: 0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f

SushiV2Factory: 0xc35DADB65012eC5796536bD9864eD8773aBc74C4

// SPDX-License-Identifier: MIT
pragma solidity =0.6.6;

import "@uniswap/v2-periphery/contracts/libraries/UniswapV2Library.sol";
import "@uniswap/v2-core/contracts/interfaces/IUniswapV2Pair.sol";

contract LiquidityValueCalculator {

address public factory;
constructor(address factory_) public {
    factory = factory_;
}

function pairInfo(address tokenA, address tokenB) public view returns (uint reserveA, uint reserveB, uint totalSupply) {
    IUniswapV2Pair pair = IUniswapV2Pair(UniswapV2Library.pairFor(factory, tokenA, tokenB));
    totalSupply = pair.totalSupply();
    (uint reserves0, uint reserves1,) = pair.getReserves();
    (reserveA, reserveB) = tokenA == pair.token0() ? (reserves0, reserves1) : (reserves1, reserves0);
}

}

Answer 1

The SushiV2Factory address you provided seem to be some Access control contract, not the factory. That is probably the cause of your error.

You probably ment SushiV2Factory: 0xc0aee478e3658e2610c5f7a4a2e1777ce9e4f2ac

Answer 2

i have spotted the problem, the pure function UniswapV2Library.pairFor used to obtain the address of the pair is different between the Uniswap and Sushiswap repositories, it uses different values inside(hex), for this reason if i use the Uniswap repository with the Sushiswap factory address i get a non-existent pair address. So the solution is to use the correct values in the UniswapV2Library.pairFor function depending on whether you are querying a pair of Uniswap or Sushiswap using their respective factory addresses.