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Question

I'm following a tutorial on freeCodeCamp and on my contract: I'm getting an error on import "hardhat/console.sol";

//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.4;

import "hardhat/console.sol";

contract Greeter {
    string private greeting;

    constructor(string memory _greeting) {
        console.log("Deploying a Greeter with greeting:", _greeting);
        greeting = _greeting;
    }

    function greet() public view returns (string memory) {
        return greeting;
    }

    function setGreeting(string memory _greeting) public {
        console.log("Changing greeting from '%s' to '%s'", greeting, _greeting);
        greeting = _greeting;
    }
}

Error: Source "hardhat/console.sol" not found: File import callback not supported

When change the path to:

import "../node_modules/hardhat/console.sol";

It works but then I'm unable to compile

However if I go to the file directly like this:

import "C:/Users/limco/Desktop/Dev- Fullstack/react-dapp/node_modules/hardhat/console.sol";

It works and compiles, I don't understand why

Answer 1

If your project file structure is something like:

• Project
  • client
  • smart_contracts
    • contracts *contract_A.sol

you'll experience this error especially assuming you're in VSCode cd'ed into the sub directory. You need to open the 'smart_contracts' directory as the root when you execute commands such as npx hardhat test etc. When 'smart_contracts' is the root it will work - though, you might get an error:

opensslErrorStack: [ 'error:03000086:digital envelope routines::initialization error' ],

which you can fix by running

export NODE_OPTIONS=--openssl-legacy-provider

Good luck!