Chainlink Hackathon 21 HardHat tutorial execute function in Smart Contract - task

Question

I would put this on stack overflow but it's specific to the hackathon. This is for the HardHat tutorial. I am trying to execute my get-number function on my smart contract. My contract is deployed. This is my command: npx hardhat get-number --contract 0x5FbDB2315678afecb367f032d93F642f64180aa3. This is the error I get: Error: call revert exception (method="getNumber()", errorArgs=null, errorName=null, errorSignature=null, reason=null, code=CALL_EXCEPTION, version=abi/5.5.0). Any thoughts would help...Thanks.
Here is the Task
task("get-number", "Reads the number")
.addParam("contract", "The contract's address")
.setAction(async (taskArgs) => {
const contractAddr = taskArgs.contract;
const MyFirstContract = await ethers.getContractFactory('MyFirstContract');
const accounts = await ethers.getSigners();
const signer = accounts[0];
const myFirstContract = await new ethers.Contract(contractAddr, MyFirstContract.interface, signer);
let result = BigInt(await myFirstContract.getNumber()).toString();
console.log('Stored number is: ' + result);
});
module.exports = {};

Answer 1

I had similar error when following along with this hackathon tutorial.
My fix was to specify the --network when executing my task, get-number. So, in your example:
npx hardhat get-number --network localhost --contract 0x5FbDB2315678afecb367f032d93F642f64180aa3
This will execute the task using the Hardhat network the demo instructed you to start when you ran npx hardhat node
Hardhat Network doc
See Running Stand-Alone doc
I asked on the hackathon Discord why the demo didn't pass this, yet still worked, but haven't yet received an answer.

Answer 2

I have the same problem, and the way I fixed it is to start hardhat with npx hardhat node --hostname 0.0.0.0 instead of npx hardhat node
You'll need to deploy the contract to localhost as well: npx hardhat run scripts/deploy.js --network localhost
Then using npx hardhat --network localhost to call the 2 functions.