Remix – Troubleshooting Library Import Issues from Uniswap Documentation in Remix

remixsolidityuniswap

I am looking how to implement liquidity pool from UniSwap documentation and getting error not found: Deferred import even when i just copy their example without any changes from my side i am getting the same error

i am trying to implement these :

import '@uniswap/v3-core/contracts/interfaces/IUniswapV3Pool.sol';
import '@uniswap/v3-core/contracts/libraries/TickMath.sol';
import '@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol';
import '@uniswap/v3-periphery/contracts/interfaces/ISwapRouter.sol';
import '@uniswap/v3-periphery/contracts/interfaces/INonfungiblePositionManager.sol';
import '@uniswap/v3-periphery/contracts/libraries/TransferHelper.sol';
import '@uniswap/v3-periphery/contracts/base/LiquidityManagement.sol';

Again..even when i copy their example i got error.I am using Remix ide

Best Answer

the way you import has to be done if you import via from your node_modules, in your case you should rather import directly from GitHub by including the link of the contract itself.

import "https://github.com/Uniswap/v3-core/blob/main/contracts/UniswapV3Pool.sol";
import "https://github.com/Uniswap/v3-core/contracts/interfaces/IUniswapV3Pool.sol";
import "https://github.com/Uniswap/v3-core/contracts/libraries/TickMath.sol";
import "https://github.com/Uniswap/v3-periphery/contracts/interfaces/ISwapRouter.sol";
import "https://github.com/Uniswap/v3-periphery/contracts/interfaces/INonfungiblePositionManager.sol";
import "https://github.com/Uniswap/v3-periphery/contracts/libraries/TransferHelper.sol";
import "https://github.com/Uniswap/v3-periphery/contracts/base/LiquidityManagement.sol";

for the IERC721Receiver.sol you need to find the right version to import or add directly to your remix and change the version.

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[Ethereum] How to import files into remix (ERC721 contract)

import "github.com/OpenZeppelin/openzeppelin-solidity/contracts/token/ERC721/IERC721.sol";
import "github.com/OpenZeppelin/openzeppelin-solidity/contracts/token/ERC721/IERC721Receiver.sol";
import "github.com/OpenZeppelin/openzeppelin-solidity/contracts/math/SafeMath.sol";
import "github.com/OpenZeppelin/openzeppelin-solidity/contracts/utils/Address.sol";
import "github.com/OpenZeppelin/openzeppelin-solidity/contracts/drafts/Counters.sol";
import "github.com/OpenZeppelin/openzeppelin-solidity/contracts/introspection/ERC165.sol";

This compiles. I am not sure about the v2.0.0 on counter. I replaced that with master.

[Ethereum] How to know the amount of ETH in the liquidity pool

Use the below function to know the liquidity of a pair:

import "./interfaces/IUniswapV2Pair.sol";
import "./interfaces/IUniswapV2Factory.sol";

contract Uniswap {

   IUniswapV2Factory factory;

   constructor(address _factory) {
       factory = IUniswapV2Factory(_factory);
   }

   function getLiquidity(address tokenA, address tokenB) view external returns (uint256) {
       IUniswapV2Pair pair;
       pair = IUniswapV2Pair(factory.getPair(tokenA, tokenB));
       return pair.balanceOf(msg.sender);
   }
   //...
}

If you know the current liquidity and what the pair ratio is, you can deduce the amount of ETH and Token for that pair.

Best Answer

Related Solutions

[Ethereum] How to import files into remix (ERC721 contract)

[Ethereum] How to know the amount of ETH in the liquidity pool

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