Lesson 4

[jacobhay2626]

error:
from solidity:
TypeError: Operator >= not compatible with types address and uint256
--> contracts/FundME.sol:19:17:
|
19 | require(msg.sender >= minimumUSD, "Didn't send enough");
| ^^^^^^^^^^^^^^^^^^^^^^^^

from the code:

// SPDX-License_Identifier:MIT

pragma solidity ^0.8.8;

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

contract FundMe{

uint256 public minimumUsd = 50;

function fund() public payable{
require(msg.sender >= minimumUsd, "Didn't send enough");
}

function getPrice() public view returns (uint256){
AggregatorV3Interface priceFeed = AggregatorV3Interface(0x8A753747A1Fa494EC906cE90E9f37563A8AF630e);
(, int256 Price,,,) = priceFeed.latestRoundData();
return uint256 (Price * 1e10);
}

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

I followed the coding in the lesson but this error comes up, any help appreciated :)

[alymurtazamemon]

@jacobhay2626 you have used msg.sender which is the address that is not compatible with operations like >=. Here you have to use msg.value for ethers.

[jacobhay2626]

Hi, thanks for the reply but I am still a bit confused, could you clarify how I use msg.value for ethers?

[jacobhay2626]

sorry, I've just realised how stupid i was being haha

[jacobhay2626]

thanks for your help