Code Error (Test)

[Webitect0x]

function fund() public {
  require(msg.value.getConversionRate() >= MIN_USD, "Not Enough Eth!"); //1e18 == 1 * 10 ** 10 == 1000000000000000000 (1eth)
  funders.push(msg.sender);
  addressToAmountFunded[msg.sender] = msg.value;
}

On this function I'm getting this 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.

This is not a real error it's just for testing

[JamesMckenna]

@WebitectTech

TypeError: blah blah blah.... Make the function "payable" or use an internal function to avoid this error.

look at the functions modifiers (a.k.a function signature)
https://docs.soliditylang.org/en/v0.8.17/cheatsheet.html#index-3

[alymurtazamemon]

@WebitectTech Add payable keyword in function signature.

function fund() public payable {
  require(msg.value.getConversionRate() >= MIN_USD, "Not Enough Eth!"); //1e18 == 1 * 10 ** 10 == 1000000000000000000 (1eth)
  funders.push(msg.sender);
  addressToAmountFunded[msg.sender] = msg.value;
}