Error using Hardhat: TypeError:ethers.getContractFactory is not a function

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1

I know ethers.getContractFactory is a function so am wondering what am missing. Maybe importing something?

:computer: Environment
Truffle v5.1.67 (core: 5.1.67)
Solidity v0.5.16 (solc-js)
Node v12.19.0
Web3.js v1.2.9

:memo:Details

hardhat
hardhat875×846 72 KB

:1234: Code to reproduce
Here is the first part of the code, everything seems ok, no?

const { expect } = require('chai');

const { ethers } = require('ethers');

describe('Token contract', () => {

    let Token, token, owner, addr1, addr2;

    beforeEach(async () => {

        Token = await ethers.getContractFactory("Token");

        token = await Token.deploy();

        [owner, addr1, addr2, _] = await ethers.getSigners();

    });

    describe('Deployment', () => {

        it('Should set the right owner', async () => {

            expect(await token.owner()).to.equal(owner.address);

        });

        it('Should assign the total supply of tokens to the owner', async () => {

            const ownerBalance = await token.balanceOf(owner.address);

            expect(await token.totalSupply()).to.equal(ownerBalance);

        });

    })
1 Like
2

I think you should remove this line

const { ethers } = require('ethers');
6 Likes
3

thanks, can you explain why this line needs to be removed?

const { ethers } = require("ethers"); should be replaced by const { ethers } = require("hardhat"); or removed as it is available in the global scope.

4 Likes
4

Hi, welcome! :wave:

I think it is available in the global scope.

1 Like
5

This worked for me…

const hre = require("hardhat");
const {
  expect
} = require('chai');

describe("NFT", () => {
  it("It should deploy the contract, mint a token, and resolve to the right URI", async () => {
    const NFT = await hre.ethers.getContractFactory("UkuNFT");
    const nft = await NFT.deploy();
    const URI = "ipfs://QmWJBNeQAm9Rh4YaW8GFRnSgwa4dN889VKm9poc2DQPBkv";
    await nft.deployed();
    await nft.mint("0x09.............................", URI)
    expect(await nft.tokenURI(1)).to.equal(URI)
  });
});
2 Likes
6

I got this same issue. This is because when you use “ethers” vscode automatically imports it into the file, which disrupts the global declaration.

1 Like
7

A post was merged into an existing topic: A contract that can't estimate gas while selling, but can buy Without issue

8

Amazing solution. Thanks alot.

9

I've tried these solution but they didn't work for me.
Is there any other solution for this 'TypeError: ethers.getContractFactory(...).deploy is not a function'?

Thanks in advance.

10

Hi, welcome to the community! :wave:

Maybe you can paste your test code, so then we can have a look what is wrong.

11 
const { expect } = require("chai");
const { ethers } = require("hardhat");
const {
  BN, // Big Number support
  constants, // Common constants, like the zero address and largest integers
  expectEvent, // Assertions for emitted events
  expectRevert, // Assertions for transactions that should fail
} = require("@openzeppelin/test-helpers");

async function fetchContractFactory() {
  const contractFactory = await ethers.getContractFactory("example");
  console.log(contractFactory);
}

fetchContractFactory();

describe("example", function () {
  let example, bob;

  before(async function () {
    bob = await ethers.getVerifiedContractAt(
      "0x6B566554378477490ab040f6F757171c967D03ab"
    );
    console.log("Should be able to read the correct address " + bob.address);
    console.log("About to deploy example contract");

    example = await ethers.getContractFactory("example").deploy(bob.address);
    console.log(`example contract deployed at ${example.address}`);
  });

  it("bb", async function () {
    await example.arrival();

    const result = await example.bob.fill("roll", 0);

    expect(result).to.be.true;
  });
});

This is the code, what do you think?

Thanks for the welcome.

12

So the error message is at this line,
const contractFactory = await ethers.getContractFactory("example");
or at this line,
example = await ethers.getContractFactory("example").deploy(bob.address);

13

The error is at this line:

example = await ethers.getContractFactory("example").deploy(bob.address);

Any solution?

Thanks in advance

14

I think you can change your writing,

const { expect } = require("chai");
const { ethers } = require("hardhat");

describe("Greeter", function () {
  it("Should return the new greeting once it's changed", async function () {
    const Greeter = await ethers.getContractFactory("Greeter");
    const greeter = await Greeter.deploy("Hello, world!");
    await greeter.deployed();

    expect(await greeter.greet()).to.equal("Hello, world!");

    const setGreetingTx = await greeter.setGreeting("Hola, mundo!");

    // wait until the transaction is mined
    await setGreetingTx.wait();

    expect(await greeter.greet()).to.equal("Hola, mundo!");
  });
});

This is a simple test case, it works well.