Lesson 3, cannot use Fund function

[JacobG321]

I am putting more than $50 of wei in to fund it, but it continues to give me this error. Any suggestions?

"Gas estimation errored with the following message (see below). The transaction execution will likely fail. Do you want to force sending?"

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.6 <0.9.0;

import "@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";

contract FundMe {
    using SafeMath for uint256;

    mapping(address => uint256) public addressToAmountFunded;

    function fund() public payable {
      // $50 usd
        uint256 minimumUSD = 50 * 10 ** 18;
        require(getConversionRate(msg.value) >= minimumUSD, "You need to spend more eth!");
        addressToAmountFunded[msg.sender] += msg.value;
        // what the eth -> USD conversion rate

    }

    function getVersion() public view returns (uint256){
        AggregatorV3Interface priceFeed = AggregatorV3Interface(0x8A753747A1Fa494EC906cE90E9f37563A8AF630e);
        return priceFeed.version();
    }

    function getPrice() public view returns (uint256){
        AggregatorV3Interface priceFeed = AggregatorV3Interface(0x8A753747A1Fa494EC906cE90E9f37563A8AF630e);
            (,int256 answer,,,) = priceFeed.latestRoundData();
            return uint256(answer * 1000000000); 

    }
// 1000000000 398811400340000000000000000000

    function getConversionRate(uint256 ethAmount) public view returns (uint256){
         uint256 ethPrice = getPrice();
         uint256 ethAmountInUsd = (ethPrice * ethAmount) / 1000000000000000000;
         return ethAmountInUsd;
}


}

[JacobG321]

[cromewar]

Hello @TwoDogsOneBigOneSmall, you are testing this on rinkeby, which means you will have to pay gas fees using the ETH on your account, this is probably failing because you don´t have enough eth to pay for the transaction, or the gas fee is incorrect (too low or to high). If you need more eth please use the chainlink faucet or optionally paste here your wallet address I'll send you some eth to Rinkeby.

Best regards, Cromewar.

[JacobG321]

I have enough ETH, I have .38 in there and I am trying to only use 0.02 ETH which is above minimum that is set in the contract. I have tried more and less gas as well. I am receiving the looping error on all of the functions in this contract, saying it requires an infinite amount of gas.

[cromewar]

Everything seems ok with your code, I reproduced the project to the exact same point you are, and the most likely scenario es you are not sending the correct value to be founded, let's consider this. The minimum entry fee is $50, which translates to this amount of eth:

Using the eth-coverter this is the amount of wei:

So in Remix IDE before sending the Fund transact you must pass the same (better higher) amount of wei as value:

If you set the correct amount when hitting the fund button, it'll work:

[JacobG321]

Thank you, it went through. I appreciate all your help. I'm sure you'll be seeing more from me soon lol.

[cromewar]

Feel free to make any other questions

[DarrenWayn]

hey i have the exact problem. i use rinkby testnet and have 1,7 eth, but it continue to fail the fund function. i tried to fund 1 whole eth

[cromewar]

remember to manage the gas fees @DarrenWayn

[DarrenWayn]

I fix it, for whatever reason the remix needs to be reload

…

On Thu, 23 Dec 2021 at 21.16 Vasiliy Gualoto ***@***.***> wrote: remember to manage the gas fees @DarrenWayn <https://github.com/DarrenWayn> — Reply to this email directly, view it on GitHub <#554 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AFKJ6AFFGF45YBDGLV22WMDUSMVKDANCNFSM5J565MPA> . Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub>. You are receiving this because you were mentioned.Message ID: <smartcontractkit/full-blockchain-solidity-course-py/repo-discussions/554/comments/1863680 @github.com>