Lesson 7 : Error: could not decode result data (value="0x", info={ "method": "getPriceFeed", "signature": "getPriceFeed()" }, code=BAD_DATA, version=6.7.1)

[tusharr1411]

I'm getting this error while testing fundMe constructor. It's grabing contract as fundMe..I have also log it in terminal

Here is my code :

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

describe("FundMe", async function(){
    let fundMe
    let deployer;
    let  _mockV3Aggregator;
    beforeEach(async function(){
        //deploy fundme using hardhat deploy
        // const accounts = await ethers.getSigners();//returns acounts in goerli
        // const accountZero =  accounts[0]
        deployer = (await getNamedAccounts()).deployer
        deployments.fixture(["all"])// fixture allows us run entire deploy folder 
        fundMe = await ethers.getContractAt("FundMe",deployer ) // to get most recent deployed contract
        _mockV3Aggregator = await ethers.getContractAt("MockV3Aggregator",deployer)
        console.log(fundMe)

    }) 
    describe("constructor",async function(){
        it("sets the aggregator address correctly", async function(){
            const response  = await fundMe.getPriceFeed();
            assert.equal(response,_mockV3Aggregator.address)

            
        })
    })
})

Here is my terminal output:

root@DESKTOP-07DER9A:~/blockchain_projects/hardhat-fund-me# yarn hardhat test
yarn run v1.22.19
warning package.json: No license field
$ /root/blockchain_projects/hardhat-fund-me/node_modules/.bin/hardhat test


  FundMe
    constructor
Contract {
  target: '0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266',
  interface: Interface {
    fragments: [
      [ConstructorFragment],
      [ErrorFragment],
      [FunctionFragment],
      [FunctionFragment],
      [FunctionFragment],
      [FunctionFragment],
      [FunctionFragment],
      [FunctionFragment],
      [FunctionFragment],
      [FunctionFragment],
      [FunctionFragment]
    ],
    deploy: ConstructorFragment {
      type: 'constructor',
      inputs: [Array],
      payable: false,
      gas: null
    },
    fallback: null,
    receive: false
  },
  runner: HardhatEthersSigner {
    _gasLimit: 30000000,
    address: '0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266',
    provider: HardhatEthersProvider {
      _hardhatProvider: [LazyInitializationProviderAdapter],
      _networkName: 'hardhat',
      _blockListeners: [],
      _transactionHashListeners: Map(0) {},
      _eventListeners: []
    }
  },
  filters: {},
  fallback: null,
  [Symbol(_ethersInternal_contract)]: {}
}
      1) sets the aggregator address correctly


  0 passing (1s)
  1 failing

  1) FundMe
       constructor
         sets the aggregator address correctly:
     Error: could not decode result data (value="0x", info={ "method": "getPriceFeed", "signature": "getPriceFeed()" }, code=BAD_DATA, version=6.7.1)
      at makeError (node_modules/ethers/src.ts/utils/errors.ts:685:21)
      at assert (node_modules/ethers/src.ts/utils/errors.ts:702:25)
      at Interface.decodeFunctionResult (node_modules/ethers/src.ts/abi/interface.ts:916:15)
      at staticCallResult (node_modules/ethers/src.ts/contract/contract.ts:332:35)
      at processTicksAndRejections (node:internal/process/task_queues:95:5)
      at staticCall (node_modules/ethers/src.ts/contract/contract.ts:289:24)
      at Proxy.getPriceFeed (node_modules/ethers/src.ts/contract/contract.ts:337:41)
      at Context.<anonymous> (test/unit/FundMe.test.js:25:31)



error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

[alfaqi]

try change getContractAt() to getContract()

[tusharr1411]

it's showing error with message: getContract() is not a function in ethers

[alfaqi]

please share your repo

[mscurtescu]

getContract() is not there in latest hardhat toolbox and all

[Kamasah-Dickson]

am also facing the same issue and error😪..somebody please help

[saintjer2224]

I also have the same issue with v. 6.7.1.

[parthsarthimishra]

Hey actually we need to use getContractAt() but the function definition is a bit different . Here is my FundMe.test.js snapshot for reference , you can use it this way :

        let fundMe
        let mockV3Aggregator
        let deployer
        const sendValue = ethers.parseEther("1")
        beforeEach(async () => {
            // const accounts = await ethers.getSigners()
            // deployer = accounts[0]
            deployer = (await getNamedAccounts()).deployer
            console.log(`deployer is : ${deployer}`)
            await deployments.fixture(["all"])
            const myContract = await deployments.get("FundMe");
            //console.log(myContract)
            //console.log(`myContract.adress : ${myContract.address}`)
            //console.log(`deployer : ${deplo}`)
            fundMe = await ethers.getContractAt(
                myContract.abi,
                myContract.address,

            );
            //console.log(fundMe)
            //fundMe = await ethers.getContractAt("FundMe", deployer)\
            const mymockV3Aggregator = await deployments.get("MockV3Aggregator");
            mockV3Aggregator = await ethers.getContractAt(
                mymockV3Aggregator.abi,
                mymockV3Aggregator.address
            )
            //console.log(mockV3Aggregator)
            //console.log(fundMe)
        })

        describe("constructor", function () {
            it("sets the aggregator addresses correctly", async () => {
                //console.log(`agar yaha kuch print hua matlab soni bhadwa hai`)
                const response = await fundMe.getPriceFeed()
                //console.log(`respponsrejunb : ${response}`)
                //console.log(mockV3Aggregator)
                assert.equal(response, mockV3Aggregator.target)
            })
        }) ```

[mscurtescu]

Finally a solution that works with the latest hardhat! Thanks @parthsarthimishra

Note: deployer is not used anymore, as far as I can tell it can be safely removed.

[smahdi-dev]

thanks @parthsarthimishra , your solution did really worked man

[david-drvar]

thanks a lot @parthsarthimishra saved me so much time :)

[Okpainmo]

thanks @parthsarthimishra this works in 2024.