Lesson 7: Invalid JSON-RPC response received when running the staging test on Rinkeby

[terrytjw]

Here is my FundMe.staging.test.ts code for context:

import { assert } from "chai";
import { ethers, getNamedAccounts, network } from "hardhat";
import { FundMe } from "../../typechain-types";

const chainId = network.config.chainId!;

// chain id of 31337 is for the development chains of "local host" or "hardhat"
chainId === 31337
  ? describe.skip
  : describe("FundMe", () => {
      let fundMeContract: FundMe, deployer: string;
      let sendValue = ethers.utils.parseEther("1");

      beforeEach(async () => {
        deployer = (await getNamedAccounts()).deployer;
        fundMeContract = await ethers.getContract("FundMe", deployer);
      });

      it("should be able to fund and withdraw", async () => {
        const txResponse = await fundMeContract.fund({ value: sendValue });
        const txReceipt = await txResponse.wait(1);
        const totalGasCost = txReceipt.gasUsed.mul(txReceipt.effectiveGasPrice);

        const balAfterFunding = await fundMeContract.provider.getBalance(
          fundMeContract.address
        );
        assert.equal(balAfterFunding.add(totalGasCost), sendValue);

        await fundMeContract.withdraw();
        const endingBal = await fundMeContract.provider.getBalance(
          fundMeContract.address // everytime u are reading/writing to the bc, it is n async call
        );
        assert.equal(endingBal.toString(), "0");
      });
    });

I'm following what Patrick did at https://youtu.be/gyMwXuJrbJQ?t=44258 but with some of my own code modifications.

I first deployed the FundMe contract by running yarn hardhat deploy --network rinkeby. Following that, I ran yarn hardhat test --network rinkeby but was returned an error that looks like this (see image below).

I've also tried changing up the RINKEBY_RPC_URL but to no avail.

Anyone has any idea why?

[alymurtazamemon]

@t3reetan

await fundMe.fund({ value: sendValue });

const tx = await fundMe.withdraw();
await tx.wait(1);

const endingBalance = await ethers.provider.getBalance(
  fundMe.address
);

assert.equal(endingBalance.toString(), "0");

try this

[alymurtazamemon]

@t3reetan yes that is why I said to rename these

[terrytjw]

Could you elaborate more on how renaming the variables would help resolve the issue?

[alymurtazamemon]

@t3reetan renaming will not solve the issue, but this test code set is working code that is why I said to check whether it is working on your side or not.

[alymurtazamemon]

@t3reetan Ok Push the code to GitHub and leave the link here I will see it.

[terrytjw]

Here you go: https://github.com/t3reetan/hardhat-fundme

Thanks for looking into this for me :)

[terrytjw]

Ok got it. I did this:

await fundMeContract.fund({ value: sendValue });

        const tx = await fundMeContract.withdraw();
        await tx.wait(1);

        const endingBalance = await ethers.provider.getBalance(
          fundMeContract.address
        );

        assert.equal(endingBalance.toString(), "0");

and it still returns me the same error.

[krakxn]

@t3reetan Make a repo and reply with the link (I noticed Ali made some changes, be sure to push them to the GitHub repo)

[krakxn]

@t3reetan Made PRs in your GitHub repo, merge them.

Then, git pull the changes to your local repo.

Also, PLEASE see the hardhat.config file -- I imported some packages and commented them as I do not know the TypeScript version of it, please edit them accordingly for TypeScript, so please change this. Do not forget to do this.

[terrytjw]

Do you mind elaborating what is it that you changed and why that works?

[krakxn]

They were not significant changes, you can comprehend them.

And do not forget the hardhat.config part.