Cannot destructure property `interface` of 'undefined' or 'null'. How to solve this?

Question

const assert = require('assert');
const ganache = require('ganache-cli');
const Web3 = require('web3');

const provider = ganache.provider();
const web3 = new Web3(provider);

const { interface, bytecode } = require('../compile');

let accounts;
let inbox;

beforeEach(async () => {
  // Get a list of all accounts
  accounts = await web3.eth.getAccounts();
  // Use one of those accounts to deploy the contract
  inbox = await new web3.eth.Contract(JSON.parse(interface))
    .deploy({ data: bytecode, arguments: ['Hi there!'] })
    .send({ from: accounts[0], gas: '1000000' });


  inbox.setProvider(provider);
});

describe('inbox', () => {
  it('deploys a contract', () => {
    assert.ok(inbox.options.address);
  });
  it('has a default message', async () => {
    const message = await inbox.methods.message().call();
    assert.equal(message, 'Hi there!');
  });
});

Answer 1

Error lies with the require('../compile')for sure as it must be returning a null.

Try referring to the code below for compilation of the solidity code. Check if your compile.js file is working in the similar manner or not.

// Compile the source code
const input = fs.readFileSync('Coin.sol');

const output = solc.compile(input.toString(), 1);

const bytecode = output.contracts[':Coin'].bytecode;

const abi = JSON.parse(output.contracts[':Coin'].interface);

Make sure you got const abi = JSON.parse(output.contracts[':Coin'].bytecode); the 'C' of 'Coin.sol' in capitals in 'compile.js' cause that's just how it's stored in solidity

Answer 2

The problem doesn't lie with the code provided. There's something wrong with your "compile" file.

const { interface, bytecode } = require('../compile');

is the issue,

require('../compile')

is returning undefined or null.

Answer 3

You need to make sure that you are exporting everything correctly from your compile.js file to your test file. I have spelling error when I was exporting contract, my code bit here module.exports = solc.compile(source, 1).contracts[':Registration']; the registration was :registration instead of :Registration and hence the {interface, bytecode } were not being exported from thecompile.js`.

I hope this helps. It was a typo, js error.

Answer 4

I also got the same error but make sure spelling of your contract name and the name you are using here: module.exports = solc.compile(source, 1).contracts[':Lottery']; and contract Lottery{ This must be identical.

Answer 5

For googlers:

The issue is with this is likely the versioning of the solc compiler. Bumping the version's dependency to one that is more recent may solve your issue.

Try the following:

1. rm -rf node_modules // remove node_modules
2. rm -rf package-lock.json // remove package-lock.json
3. Change the .sol file's import statement to: pragma solidity ^0.4.25
4. Change the dependency in package.json to "solc": "^0.4.25"
5. npm install // install new dependencies

Then you can run your tests