General Thread for practicing question formatting!

[ajayadav945]

function fund() public {
        //want to be able to et a minimum fund amount in usd
        //1. How do we send Eth to this contract?
        
        require(msg.value.getConversionRate() >= MINIMUM_USD, "Didn't send enough"); //1e18 = 1*10^18
        funders.push(msg.sender);
        addressToAmountFunded[msg.sender] = msg.value;
    }

on this function, I'm running into an error:

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.
  --> contracts/FundMe.sol:24:17:

can someone tell me what's going on?

[alfaqi]

Hi @ajayadav945
Just add payable to fund function, like this

   function fund() public payable {
      ...
   }