How can I inherit contact on github?

Question

there is a contract on github. I need to inherit it/ So how can I do it? Using import isn't available how I unnderstand..

https://github.com/Uniswap/v2-periphery/blob/master/contracts/interfaces/IUniswapV2Router01.sol

Answer 1

You could just import from the GitHub link, but in your case there is an nom package containing that contract already so you could:

1. Run npm i @uniswap/v2-periphery on your project.
2. Import it like this on your .sol file: import '@uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router01.sol';

Answer 2

Good Day

One Can Do the Following below your pragma statement

Add The Following

import "./interfaces/IUniswapV2Router01.sol";

Or

import '@uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router01.sol';

above your constructor declare the following

 address public routerContract;

in the Constructor you can do the following

 constructor(address routerContractAddr){
        routerContract= routerContractAddr;
    }

in order to use the interface functions one can do the following

IUniswapV2Router01(routerContract).swapExactTokensForTokens(....);

remember to deploy your contract with the correct Uniswap Router Address

an example of a deploy script using hardhat is illustrated below

 module.exports = async ({ ethers, getNamedAccounts, deployments }) => {
  const { deploy } = deployments;
  const { deployer } = await getNamedAccounts();
  await deploy("YourContract", {
    from: deployer,
    args: ["UNISWAP_CONTRACT_ADDRESS"],
    deterministicDeployment: false,
    log: true,
  });
 
};

module.exports.tags = ["YourContract"]; 

I Really Hope That My Answer Provides Clarity

Thank You