node:assert:400 throw err; ^ AssertionError [ERR_ASSERTION]: Invalid callback object specified

Question

I'm trying to run node compile.js but it's throwing me this error and idea what I am doing wrong:

node:assert:400 throw err; ^ AssertionError [ERR_ASSERTION]: Invalid callback object specified

my inbox.sol

pragma solidity ^0.8.9;

contract Inbox{
    string public message;

    function Inbox(string intialMessage) public {
        message = intialMessage;
    }

    function setMessage(string newMessage) public {
        message = newMessage;
    }
}

my package.json

{
  "dependencies": {
    "ganache-cli": "^6.12.2",
    "mocha": "^9.1.3",
    "solc": "^0.8.9",
    "web3": "^1.6.0"
  }
}

Answer 1

Just rewrite your code like this in 'compile.js'.This work fine even in 0.8.0 version of solidity

const path = require('path');
const fs = require('fs');
const solc = require('solc');

const inboxpath = path.resolve(__dirname, 'Contracts', 'Inbox.sol');
const source = fs.readFileSync(inboxpath, 'UTF-8');

var input = {
    language: 'Solidity',
    sources: {
        'Inbox.sol' : {
            content: source
        }
    },
    settings: {
        outputSelection: {
            '*': {
                '*': [ '*' ]
            }
        }
    }
};

var output = JSON.parse(solc.compile(JSON.stringify(input)));

// console.log(output.contracts['Inbox.sol']['Inbox']);

// exports.abi = output.contracts['Inbox.sol']['Inbox'].abi;
// exports.bytecode = output.contracts['Inbox.sol']['Inbox'].evm.bytecode.object;