Lesson 7: fund.js - Error: cannot estimate gas;

[dgbweb3]

When I run:
yarn hardhat run scripts/withdraw.js --network localhost

It runs successfully.

When running the command:
yarn hardhat run scripts/fund.js --network localhost

it returns:
Error: cannot estimate gas; transaction may fail or may require manual gas limit [ See: https://links.ethers.org/v5-errors-UNPREDICTABLE_GAS_LIMIT ] (reason="Error: VM Exception while processing transaction: reverted with reason string 'You need to spend more ETH!'"

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

async function main() {
    const { deployer } = await getNamedAccounts()
    const fundMe = await ethers.getContract("FundMe", deployer)
    console.log(`Got contract FundMe at ${fundMe.address}`)
    console.log("Funding contract...")
    const transactionResponse = await fundMe.fund({
        value: ethers.utils.parseEther("0.1"),
    })
    await transactionResponse.wait()
    console.log("Funded!")
}

main()
    .then(() => process.exit(0))
    .catch((error) => {
        console.error(error)
        process.exit(1)
    })

[Darlington02]

Can you send a snippet of your contract code? You are trying to send less ETH than required in your constructor

[dgbweb3]

 constructor(address priceFeed) {
        s_priceFeed = AggregatorV3Interface(priceFeed);
        i_owner = msg.sender;
    }

    /// @notice Funds our contract based on the ETH/USD price
    function fund() public payable {
        require(
            msg.value.getConversionRate(s_priceFeed) >= MINIMUM_USD,
            "You need to spend more ETH!"
        );
        // require(PriceConverter.getConversionRate(msg.value) >= MINIMUM_USD, "You need to spend more ETH!");
        s_addressToAmountFunded[msg.sender] += msg.value;
        s_funders.push(msg.sender);
    }

[Darlington02]

Your require function, states it needs an ETH amount greater than Or equal to Minimum_USD. Convert your minimum_USD to ETH, and convert it to Wei, then send that amount in your deployment script.

What is your minimum_USD set to? I cant find it in this snippet.

[dgbweb3]

It is set to $50

// State variables
    uint256 public constant MINIMUM_USD = 50 * 10**18;
    address private immutable i_owner;

[alymurtazamemon]

@dgbweb3

Maybe not specifying the waiting time make it out of gas. You can check it and let me know.

- await transactionResponse.wait()
+ await transactionResponse.wait(1)

If you still face issues then show both your contracts.

[alymurtazamemon]

@dgbweb3 And which address are you using for priceFeed? Can you show that?

[dgbweb3]

const networkConfig = {
    4: {
        name: "rinkeby",
        ethUsdPriceFeed: "0x8A753747A1Fa494EC906cE90E9f37563A8AF630e",

[alymurtazamemon]

@dgbweb3 Contract looks perfect, and you are running on localhost so it means you also have funds. Really trying to find the problem but struggling here. You can either check by increasing the amount or by checking on testnet (make sure you have funds in testnet wallet)?

[alymurtazamemon]

@dgbweb3 And you also have mentioned 0.1 for funds which is also too much, so it is not an issue.

[dgbweb3]

Funds in my wallet are there.

[dgbweb3]

[dgbweb3]

There was an issue in my 00-deploy-mocks.js

It looks like the

const INITIAL_PRICE = "200000000000"

may have fixed the issue.

ORIGINAL:

const { network } = require("hardhat")
const {
    developmentChains,
    DECIMALS,
    INITIAL_ANSWER,
} = require("../helper-hardhat-config")

module.exports = async ({ getNamedAccounts, deployments }) => {
    const { deploy, log } = deployments
    const { deployer } = await getNamedAccounts()

    if (developmentChains.includes(network.name)) {
        log("Local network detected...deploying mocks")

        await deploy("MockV3Aggregator", {
            contract: "MockV3Aggregator",
            from: deployer,
            log: true,
            args: [DECIMALS, INITIAL_ANSWER],
        })
        log("Mocks deployed!")
        log("_________")
    }
}

module.exports.tags = ["all", "mocks"]

NEW:

const { network } = require("hardhat")

const DECIMALS = "8"
const INITIAL_PRICE = "200000000000" // 2000
module.exports = async ({ getNamedAccounts, deployments }) => {
    const { deploy, log } = deployments
    const { deployer } = await getNamedAccounts()
    const chainId = network.config.chainId
    // If we are on a local development network, we need to deploy mocks!
    if (chainId == 31337) {
        log("Local network detected! Deploying mocks...")
        await deploy("MockV3Aggregator", {
            contract: "MockV3Aggregator",
            from: deployer,
            log: true,
            args: [DECIMALS, INITIAL_PRICE],
        })
        log("Mocks Deployed!")
        log("------------------------------------------------")
        log(
            "You are deploying to a local network, you'll need a local network running to interact"
        )
        log(
            "Please run `npx hardhat console` to interact with the deployed smart contracts!"
        )
        log("------------------------------------------------")
    }
}
module.exports.tags = ["all", "mocks"]