General Thread For Practicing Question Formating!

[anerishah321]

 function fund() public  {
        require(msg.value.getConversionRate() >= MINIMUM_USD, "You need to spend more ETH!");
        // require(PriceConverter.getConversionRate(msg.value) >= MINIMUM_USD, "You need to spend more ETH!");
        addressToAmountFunded[msg.sender] += msg.value;
        funders.push(msg.sender);
    }

on this function I’m having an error:

"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.

can someone tell what is going on.

[Chupito-eth]

Hey there! I'm going to use your thread in order to practice my question formating :)

    function fund() public payable{
        require(msg.value.getConversionRate() >= MINIMUM_USD, "Didn't send enough!");
        funders.push(msg.sender);
        addressToAmountFunded[msg.sender] = msg.value;
    }

I need some help. When I compile this code, I get the next error:

DeclarationError: Undeclared identifier