Lesson 4: Transaction Fail

[rgperkins]

I am on the Fund Me section of the tutorial. This is the point I am at. The contract is deployed on the Goerli testnet (in the tutorial it is the Rinkby testnet). When I go to fund the account, the transaction fails. I converted the price of ETH, atp in time the minimum — $50, is 0.03 ETH. I increased the amount I send up to 0.05, and the transaction still fails. I increased the gas limit, minimum is 3 million, I increased it up to 9 million, still fails. This is the error message I get "Gas estimation errored with the following message (see below). The transaction execution will likely fail. Do you want to force sending?
execution reverted: Send more ETH!"
Here is the fund me contract.
`//SPDX-License-Identifier: MIT
pragma solidity ^0.8.8 ;

import "./PriceConverter.sol";

contract FundMe {

using PriceConverter for uint256;

uint256 public minimumUsd = 50 * 1e18;

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

address public owner;

constructor () {
    owner = msg.sender;
}

function fund() public payable {
    //Set a minimum fund amount in USD
    require(msg.value.getConversionRate() >= minimumUsd, "Send more ETH!"); // 1e18 = 1 * 10 ** 18 = 1000000000000000000
    funders.push(msg.sender);
    addressToAmountFunded[msg.sender] = msg.value; 
}

function withdraw() public onlyOwner {

/*starting index, ending index, step amount*/
for(uint256 funderIndex = 0; funderIndex < funders.length; funderIndex++ /*funderIndex = funderIndex +1*/){
    //everytime code in for loop fininshes, step increases by 1
    address funder = funders[funderIndex];
    addressToAmountFunded[funder] = 0;
    }
    //reset the array
    funders = new address[](0);
    (bool callSuccess, /*bytes memory dataReturned*/) = payable(msg.sender).call{value: address(this).balance}(""); /*returns 2 variables, we only care about one*/
    require(callSuccess, "Call f4iled");    
}

modifier onlyOwner {
    require(msg.sender == owner, "Not Owner!");
    _;
}

}`

Here is the price converter contract.
`//SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

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

library PriceConverter {

 function getPrice() internal view returns(uint256) {
    //ABI
    //Address 0x44390589104C9164407A0E0562a9DBe6C24A0E05
    AggregatorV3Interface priceFeed = AggregatorV3Interface(0xca983FeF4bE2C35Ac245e7270976797f0Dd95266);
    (,int256 price,,,) = priceFeed.latestRoundData();
    //ETH in terms of USD
    //3000.00000000
    return uint256(price * 1e10); //1**10 == 100000000
}

function getVersion() internal view returns(uint256) {
    AggregatorV3Interface priceFeed = AggregatorV3Interface(0xca983FeF4bE2C35Ac245e7270976797f0Dd95266);
    return priceFeed.version();
}

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

}`

[alymurtazamemon]

@rgperkins First of all make sure you are using the correct address for price feed. For goerli testnet the address is this 0xD4a33860578De61DBAbDc8BFdb98FD742fA7028e

[rgperkins]

Thanks, that worked. Where did you get the Goerli address? The original address I used came from the Chainlink website, I changed it to the one in the code repository on github later on. Neither one worked.

[alymurtazamemon]

@rgperkins LINK

[rgperkins]

Thanks 👍

[alymurtazamemon]

@rgperkins Make sure to mark the answer at the end to close the discussion.

[rgperkins]

OK will do, thank-you so much for your help.