Practicing question formatting.

[fern292]

Just for practice

function fund() public {
        // Want to be able to set a minimum fund amount in USD
        // 1. How do we send ETH to this contract?
        require(msg.value.getConversionRate() >= MININUM_USD, "Didn't send enough."); // 1e18 == 1 * 10 ** 18 == 1000000000000000000
        funders.push(msg.sender);
        addressToAmountFunded[msg.sender] = msg.value;
    }

The function above is getting the warning below.

TypeError: "msg.value" and "callvalue()" can only be used in payable public functions. Make the function "payable" or use an internal function to avoid this error.

Does anyone know why?
Just for practice, no answer needed, unless you want to practice answering, go for it.
Cheers.

[alymurtazamemon]

@fern292 you do need to post for testing with formatting, you can do formatting and view it in the preview tab, right to the tab where you write.