Lesson 7. Difference between .address and .getAddress()

[NickoMenty]

Sometimes contract.address reteruns undentified. Here is an example
If i run this code, I receive the following error:
AssertionError: expected '0x5FbDB2315678afecb367f032d93F642f641…' to equal undefined

const { assert } = require("chai")
const { deployments, ethers, getNamedAccounts } = require("hardhat")

describe("FundMe", async function () {
    let fundMe
    let mockV3Aggregator
    let deployer
    beforeEach(async function () {
        deployer = (await getNamedAccounts()).deployer
        // "deployments.fixture" will deploy contracts that have tag "all" on local network
        await deployments.fixture(["all"])
        // "ethers.getContract" will give as the most recent deploy of "FundMe" contract
        fundMe = await ethers.getContract("FundMe", deployer)
        mockV3Aggregator = await ethers.getContract(
            "MockV3Aggregator",
            deployer
        )
    })

    describe("constructor", async function () {
        it("Sets the aggregator address correctly", async function () {
            const response = await fundMe.priceFeed()
            assert.equal(response, mockV3Aggregator.address)
        })
    })
})

However, if I change to "await mockV3Aggregator.getAddress()", then it works.

describe("constructor", async function () {
        it("Sets the aggregator address correctly", async function () {
            const response = await fundMe.priceFeed()
            assert.equal(response, await mockV3Aggregator.getAddress())
        })
    })

My question is why does the first example works fine for Patric, but not for me. And what is the difference between .address and .getAddress(). I have the same hardhat version as he had. Also in other scripts I use .address, and it works perfecly fine.

if you do know, I would be glad if you help me!

[alfaqi]

Hey @NickoMenty, due to versions of ethers.
In version 5, to get address of deployed contractcontract.address
In version 6, changed to await contract.getAddress() or contract.target

Hey @Astronaut828, check your deploy scripts, I think you have some issue with them.

[Astronaut828]

@alfaqi so far all my tests are failing, the second test didn't revert either, my deploy scripts match the ones in the repo
( https://github.com/Astronaut828/solidity/tree/main/hh-solidity/hardhat-fund-me )

[alfaqi]

see here
#5988 (comment)

[eik-1]

You should try
assert.equal(response, mockV3Aggregator.target)