General Thread for practicing question formatting!

[hardhat-freecodecamp]

    function fund() public {
        require(msg.value.getConversionRate() >= MINIMUM_USD, "Didn't send enough!");
        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.

Can someone tell me what's going on?

[cromewar]

Sample Answer (take this as reference for future answers)
for a function which requires a value as payment, you must add payable to it:

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

I hope this info might help.

[sourspoon45]

Hello, Im starting lesson 5.

[shrtpvteacher]

Concern:
I am working on my front end for my Solidity smart contracts, using NextJS -w Typescript Tailwind CSS. The error is in the ./styles/global.css file

@tailwind base;
@tailwind components;
@tailwind utilities; 

I'm running into an error:

Unknown at rule @tailwindcss(unknownAtRules)
No quick fixes available

Question: Does anyone know what I can do to get the app to recognize the @tailwind rule and get rid of the error? I did local install typescript tailwindcss postcss and hardhat into the next-app project directory. I also have an m1 mac, using natively to install instead of Rosetta, but unsure if it is machine code architecture issue, looking for suggestions to fix this. Thank you for your time and consideration :)

[IamQua]

I found it Woohoo!!!

[NickoMenty]

hi @shrtpvteacher , did you find a solution to ?
@tailwind base;
@tailwind components;
@tailwind utilities;

Unknown at rule @tailwindcss(unknownAtRules)

[Marcus-SS]

hi

[DerOres]

function fund() public payable{
        // 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() >= MINIMUM_USD, "Didn't send enough!");// 1e18 == 1 * 10 * 18 == 1000000000000000000 WEI
        // got 18 decimal
        funders.pu(msg.sender);
        addressToAmountFunded[msg.sender] = msg.value;
    }

On this function I'm running into an error:

TypeError: Member "pu" not found or not visible after argument-dependent lookup in address[] storage ref.

Can someone help me understanding it ?

[DerOres]

no need to actually ;)
Patrick => G.O.A.T

[PatrickAlphaC]

Woot woot!!! Great job formatting!!

Thanks for the kind words :)

[primeamaroh]

pragma solidity ^0.8.4;

 function fund() public {
        require(msg.value.getConversionRate() > MINIMUM_USD);
        funders.push(msg.sender);
        AmountToAddress[msg.sender] = msg.value;

    }

This is a sample question, only testing if I am asking questions in the best way, if not please do help. 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.

[PatrickAlphaC]

Thank you for practicing!!

[KapilKumar7]

pragma solidity ^0.8.4;

function fund() public {
require(msg.value.getConversionRate() > MINIMUM_USD);
funders.push(msg.sender);
AmountToAddress[msg.sender] = msg.value;

}

This is a sample question, only testing if I am asking questions in the best way, if not please do help. 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.

[KapilKumar7]

Use backticks ` (key left to 1) instead of comma , Thanks for asking Happy learning.

[primeamaroh]

I fixed it. Thank you guys so much, more blessings to you.

[primeamaroh]

Thank you for practicing!!

and a big thank you for an awesome course

[pro123908]

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

I'm getting the following error in this function, can anyone help? Thanks

TypeError: "msg.value" and "callvalue()" can only be used in payable public functions.

[formant56]

   function fund() public {
        require(msg.value.getConversionRate() >= MINIMUM_USD, "Didn't send enough!");
        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.

Can someone tell me what's going on?

[IntelAdviseMark]

    function fund() public {
        require(msg.value.getConversionRate() >= MINIMUM_USD, "Didn't send enough!");
        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.

Can someone tell me what's going on?

//practice answer "Just add payable to the fund function. That should fix it."
function fund() public payable{
        require(msg.value.getConversionRate() >= MINIMUM_USD, "Didn't send enough!");
        funders.push(msg.sender);
        addressToAmountFunded[msg.sender] = msg.value;
    }

[amorono]

function fund() public {
        require((msg.value).getConversionRate() >= MIN_USD, "Min amount is 50 USD");
        funders.push(msg.sender);
        fundAmountList[msg.sender] += msg.value;
    }

On this function I run into the following 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 somebody help me with this?

[amorono]

Hi! It seems you need to add payable after declaring the visibility of the function:

function fund() public payable {
        require((msg.value).getConversionRate() >= MIN_USD, "Min amount is 50 USD");
        funders.push(msg.sender);
        fundAmountList[msg.sender] += msg.value;
    }

That will fix the error.

[asorpreso]

Praticing

    function fund() public payable {
        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);
    }

Thanks Patrick

[WilliamGiammona]

***For practice only

function fund() public {
        require((msg.value).getConversionRate() >= MIN_USD, "Min amount is 50 USD");
        funders.push(msg.sender);
        fundAmountList[msg.sender] += msg.value;
    }

On this function I'm running into this 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 please explain what's going on?

[supaari89]

Practice

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

On this function I'm running into this 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.
--> contracts/Fundme.sol:32:13:

Can someone please explain what is going on

[BentCrypto]

Practise:

function withdraw()  onlyOwner{
        // for (/* starting index, ending index, step amount */) // Funderindex + 1 is same as Funderindex++
        for (uint256 funderIndex = 0; funderIndex < funders.length; funderIndex++){
        // code
        address funders = funders[funderIndex];
        addressToAmountFunded[funders] = 0;
    }

On this function I am getting this error:

SyntaxError: No visibility specified. Did you intend to add "public"?

Can somebody tell he what is going on?

[Jobo0o]

Practise formatting:

modifier onlyOwner {
        //require(msg.sender == i_owner, "Sender is not owner!");
        if(msg.sender != i_owner) {revert NotOwner();}
        _; // to run the rest of the code after the statement above
    }

Im running into an error with this code snippet. Can someone help me?

  --> contracts/FundMe.sol:50:55:
   |
50 |         if(msg.sender != i_owner) {revert NotOwner();};
   |                                                       ^

[nkt2pd]

Practice formatting:

Running into an error on my receive function:

receive() external payable {
        fund()
    }

Error Message:

ParserError: Expected ';' but got '}'

Anyone know what this means?

[SebasAran16]

Hi Patrick,

I'll be glad to help you (I wish I could haha), you are been asked to add payable to the function, I did add it and it looks like this:

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

You will not receive any error after adding "payable", I hope it helps you.

Thx Patrickkkkkk!!!

[atenger]

Lesson 5 Practice

• This course is awesome.
• The markdown tutorial was helpful

I was running into the same error until I added payable keyword into the function.

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

Hope this helps! ;)

[BRANDnewWATER]

this is the message I get at the top left on line 1. any help would be appreciated
"
from solidity:
Warning: SPDX license identifier not provided in source file. Before publishing, consider adding a comment containing "SPDX-License-Identifier: " to each source file. Use "SPDX-License-Identifier: UNLICENSED" for non-open-source code. Please see https://spdx.org for more information.
--> contracts/SimpleStorage.sol "

// SPDX-license-Identifier: MIT
pragma solidity ^0.8.8;

contract SimpleStorage {
// boolean, uint, int, address, bytes
bool hasfavoriteNumber = true;
uint256 favoriteNuber = 123 ;
}

That is what i have so far, but getting an error on line 1 about SPDX license.. Thank you in advance

[alymurtazamemon]

@BRANDnewWATER Change this // SPDX-license-Identifier: MIT to this // SPDX-License-Identifier: MIT

[BRANDnewWATER]

Thank you for the reply, but where is the difference?

[alymurtazamemon]

@hardhat-freecodecamp License L should be capital

[BRANDnewWATER]

Ahh ok, thank you very much. obv im a newb. lol
I now know that capitalization def matters

[alymurtazamemon]

@BRANDnewWATER No issue, You can ask anything!

[marc23gold]

  function fund() public {
        require(msg.value.getConversionRate() >= MINIMUM_USD, "Didn't send enough!");
        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.

Can someone please tell me what's going on?

[KasTheDev]

receive() external {
            fund();
        }

I'm having this type of error

DeclarationError: Receive ether function must be payable, but is "nonpayable".

Can someone help me understand?
-Practice Question

[cryptoni9n]

    function fund() public {
        require(msg.value.getConversionRate() >= MINIMUM_USD, "Didn't send enough!");
        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.

Can someone tell me what's going on?

Hi hardhat-freecodecamp - you need to make the public function payable in order to use msg.value and callvalue(), like this:

 function fund() public payable {
        //we want to be able to set a minimum fund amount in USD
        //How do we send ETH to this contract? => payable keyword allows contract to hold ETH
        require(msg.value.getConversionRate() >= MINIMUM_USD, "Feed me more."); //1e18 == 1 * 10 ** 18 == 1000000000000000000 wie = 1 ETH
        //18 decimal places
        funders.push(msg.sender);
        addressToAmountFunded[msg.sender] = msg.value;        
    }

Hope this helps!

[cryptokumaru]

This should fix it:

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

[Obi-Chidubem]

function getConversionRate(uint256 ethAmount) view returns(uint256){
        uint256 ethtodollarPrice = getPrice();
        uint256 ethAmountInUsd = (ethtodollarPrice * ethAmount) / 1e18;
        return ethAmountInUsd;
    }

I'm running into the error below on this function:

SyntaxError: No visibility specified. Did you intend to add "public"?

Can someone help?
P.S. I know what the problem is, so you don't really need to help. I'm just trying to test out the formatting syntax. Thanks.

[dalteko]

TEST ANSWER:

Hey! The problem is that you didn't add a "payable" to your function, which is necessary when you're receiving funds in a smart contract.

Specifically, your function header should look like this:

function fund() public payable {}

[hendythee]

function fund() public {
        require(msg.value.getConversionRate() >= MINIMUM_USD, "Please send more!");
        funders.push(msg.sender);
        addressToAmountFunded[msg.sender] += msg.value;
    }

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.

Just testing a thread ;)

[PhDr-B]

Testing formatting.

    function fund() public  {
        //Want to be able to set a minimum fund amount
        //1. How do we send ETH to this contract?
        //Contracts can hold funds like wallets do
        
        require(msg.value.getConversionRate() >= MINIMUM_USD, "Didn't send enough"); //1e18 == 1 eth in wei, also need to get ETH to USD for this (oracle)
        funders.push(msg.sender);
        addressToAmountFunded[msg.sender] = msg.value;
    }

On this function I am running into an error (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.

[ghost]

Practicing question formatting:

pragma solidity ^0.8.8;

 function fund() public {
        require(msg.value.getConversionRate() > MINIMUM_USD);
        funders.push(msg.sender);
        AmountToAddress[address] = msg.value;

    }

On the above function, I am receiving the following error upon deployment:

TypeError: Type type(address) is not implicitly convertible to expected type address.

[MattBCarr]

Hi everyone, running into this issue with my solidity function. Can anyone help me out?
Heres the code:

pragma solidity ^0.8.0;

contract MyContract {
  event Log(string message);

  function myFunction() public {
    emit Log("
        P is for his Programming skills, so top-notch
        A is for his Ability to teach with grace and watch
        T is for his Tenacity, always pushing us to learn
        R is for his Resourcefulness, making concepts easy to discern
        I is for his Insight, always knowing the best path
        C is for his Coolness, keeping us calm in the aftermath
        K is for his Knowledge, which he shares so freely
        Patrick, our instructor, with his help we'll surely see
        Solidity and Web3, a world that's now less scary
        Thank you Patrick, for making it all so very merry!"
);
  }
}

[OlamiposcyDev]

Practice test:

function widthraw() onlyOwner {
        for(uint256 funderIndex = 0; funderIndex < funders.length; funderIndex++){
            //code
            address funder = funders[funderIndex];
            addressToAmountFunded[funder] = 0;
        }

        // reset the array
        funders = new address[](0);
        // actually withdraw the funds
       
        // call
        (bool callSuccess, ) = payable(msg.sender).call{value: address(this).balance}("");
        require(callSuccess, "Call failed");
    }

Can someone help me with this function, the error i'm getting is:

SyntaxError: No visibility specified. Did you intend to add "public"?

[Xenoce]

Practice test:

Help!
I need somebody
Help
Not just anybody
Help
You know I need someone
Help

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

Error in question:

from solidity:
When I was younger, so much younger than today
NeedError: "help.value" and "helpvalue()" cannot be used when you need nobody's help in any way.
Ensure that those days are gone and you're not so self-assured.
Then you'll find function "changeYourMind()" or open up the doors in the internal function to avoid this error.
  --> Contracts/32 Hour Course Projects/Lesson 4/FundMe.sol:30:17:
   |
30 |         require(msg.value.getConversionRate() >= minimumUSD, "Didn't send enough! MOAR!");
   |                 ^^^^^^^^^

Help me if you can, I'm feeling down
And I do appreciate you being 'round.

[shelbytrades]

    function getVersion() internal view returns (uint256){
        AggregatorV3Interface pricefeed = AggregatorV3Interface(0x694AA1769357215DE4FAC081bf1f309aDC325306);
        return pricefeed.version();
    }

Im not really sure what to do with this

test

[ChukwuemekaKarl]

Practice test

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

Pls can someone help me with this, i am getting this error message

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.