Lesson 4: Didn't send enough error.

[ghost]

Hi, I am testing the FundMe code on the Sepolia testnet but I keep getting the following error:

From the FundMe contract code, this error is coming from the fund amount being less than the minimum allowed amount. I have tried with three amount, 0.02, 0.03 and 0.1 and i get the same error for all. What could be the issue?
FundMe.sol:

`// SPDX-License-Identifier: MIT
pragma solidity >=0.8.15;

import "./PriceConverter.sol";

contract FundMe {
using PriceConverter for uint256;

uint256 public minimumUsd = 50 * 10e18;

address[] public funders;
mapping(address => uint256) public addressToAmountFunded;

address public owner;

constructor() {
    owner = msg.sender;
}

// Fund the contract
function fund() public payable {
    require(
        msg.value.getConversionRate() >= minimumUsd,
        "Did not send enough"
    ); 
    funders.push(msg.sender);
    addressToAmountFunded[msg.sender] = msg.value;
}

function withdraw() public onlyOwner {
    for (
        uint256 funderIndex = 0;
        funderIndex < funders.length;
        funderIndex++
    ) {
        address funder = funders[funderIndex];
        addressToAmountFunded[funder] = 0;
    }
    funders = new address[](0);

    // Withdraw funds - there are 3 methods: transfer, send and call

    (bool callSuccess, ) = payable(msg.sender).call{
        value: address(this).balance
    }("");
    require(callSuccess, "Call failed"); // this helps to revert the txn in case of a failure.
}

modifier onlyOwner() {
    require(msg.sender == owner, "Sender is not owner!");
    _;
}

}
`
PriceConverter.sol

`// SPDX-License-Identifier: MIT
pragma solidity >=0.8.15;

import "@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol";

// Make the functions in this library callable on uint256

library PriceConverter {
// Function to get the price of ETH in USD
function getPrice() internal view returns (uint256) {

    AggregatorV3Interface priceFeed = AggregatorV3Interface(
        0x694AA1769357215DE4FAC081bf1f309aDC325306
    );
    (, int256 price, , , ) = priceFeed.latestRoundData(); 
    // ETH in terms of USD
    return uint256(price * 1e10);
}

function getVersion() internal view returns (uint256) {
    // ETH/USD price feed address of Sepolia Network.
    AggregatorV3Interface priceFeed = AggregatorV3Interface(
        0x694AA1769357215DE4FAC081bf1f309aDC325306
    );
    return priceFeed.version();
}

function getConversionRate(uint256 etAmount) internal view returns (uint256) {
    uint256 ethPrice = getPrice();
    uint256 ethAmountInUsd = (ethPrice * etAmount) / 1e18;
    return ethAmountInUsd;
}

}
`

[Nlferu]

Hello @ngert

You are just passing not enough ETH. Remember it is converting given ETH into USD and then compares it to 50$ min requirement calculated based on current ETH price. Try passing like 0.15 ETH, so 150000000000000000 Wei. Also make sure you have enough ETH on your Sepolia MetaMask account.

[ghost]

Thank you for your response. I realised that the issue had come from how I had done the conversion for the minimum USD variable. When I fixed that, it worked.