Lesson 7: could not decode result data (value="0x", info={ "method": "priceFeed", "signature": "priceFeed()" }, code=BAD_DATA, version=6.6.1)

[amine08]

in the FundMe.test.js i use getContractAt() instead of get
contract() but it give me this error

1) FundMe
       constractor
sete the aggregatore address corectly:
     Error: could not decode result data (value="0x", info={ "method": "priceFeed", "signature": "priceFeed()" }, code=BAD_DATA, version=6.6.1)

FundMe.test.js file

//11.08.36 // testing
const { assert, expect } = require("chai")
const { deployments, ethers, getNamedAccounts } = require("hardhat")

describe("FundMe", async function () {
    let fundMe, deployer, mockV3Aggregator
    const { log } = deployments
    const sendValue = ethers.parseEther("1") // 1eth

    beforeEach(async function () {
        deployer = (await getNamedAccounts()).deployer
        await deployments.fixture(["all"])
        fundMe = await ethers.getContractAt("FundMe", deployer)
        mockV3Aggregator = await ethers.getContractAt(
            "MockV3Aggregator",
            deployer
        )
        })
    describe("constractor", async function () {
        it("sete the aggregatore address corectly", async function () {
            const response = await fundMe.priceFeed()
            console.log("response ::", response)
            assert.equal(response, mockV3Aggregator.address) //11.17.40
        })
    })
})

the package file

{
  "devDependencies": {
    "@chainlink/contracts": "^0.6.1",
    "@nomicfoundation/hardhat-chai-matchers": "^2.0.0",
    "@nomicfoundation/hardhat-ethers": "^3.0.0",
    "@nomicfoundation/hardhat-network-helpers": "^1.0.0",
    "@nomicfoundation/hardhat-toolbox": "^3.0.0",
    "@nomicfoundation/hardhat-verify": "^1.0.2",
    "@nomiclabs/hardhat-ethers": "npm:hardhat-deploy-ethers",
    "@nomiclabs/hardhat-etherscan": "^3.1.7",
    "@typechain/ethers-v6": "^0.4.0",
    "@typechain/hardhat": "^8.0.0",
    "chai": "^4.2.0",
    "dotenv": "^16.3.1",
    "ethers": "^6.0.0",
    "hardhat": "^2.15.0",
    "hardhat-deploy": "^0.11.31",
    "hardhat-gas-reporter": "^1.0.8",
    "prettier": "^2.8.8",
    "prettier-plugin-solidity": "^1.1.3",
    "solidity-coverage": "^0.8.0",
    "typechain": "^8.1.0"
  }
}

when i use ethers5.1.3 it skip all the test , it dosen't work
thank you all
@alymurtazamemon

[pirqqs]

Try copying pasting the package.json from the repo and then run yarn install

[amine08]

i tryed this but it didn't give error but it skyp the test

$ /home/amine/folser/hardhat-fund-fcc/node_modules/.bin/hardhat test

  0 passing (1ms)

Done in 2.57s.

[pirqqs]

Could you provide the link to your repo?

[satishnvrn]

Getting the same error.

[Mumtaz503]

Please provide your contract's code so we can look into it.

[satishnvrn]

I'm able to fix the error with ethers V6 and hardhat-toolbox. Here is the link to my repo.

[amine08]

i solve this problem by changed "hardhat-toolbox" to hardhat-waffle
the change must be in files "package.json" and "hardhat-config.js"

if there is a solution withe "hardhat-toolbox" it will be better

[pirqqs]

Oh yes sure I forgot to tell you to change that!

I runned into the same error when I was in this lesson and I worked with hardhat-waffle like in the repo since then.

[satishnvrn]

I think we have to use "hardhat-toolbox" for the latest hardhat projects. "hardhat-toolbox" includes all the required plugins. We cannot leave it and use a single plugin. We have to figure out a way to work with the "hardhat-toolbox".

[satishnvrn]

I'm able to fix the error in my repo using the latest ethers version that is V6 and also using "hardhat-toolbox"

[Mumtaz503]

Please mark the question as answered if it's solved.

[satishnvrn]

@amine08 Can you check mark this as answered please.

[Mumtaz503]

Please provide the contract's code.