Setup hardhat project

1. Create a new folder for the project.

2. cmd the folder and write on the terminal: npm install --save-dev hardhat

3. To set up a project: npx hardhat

4. Choose create a JavaScript project

5. Create a new Contract file and write the code.

6. Modify 'deploy.js' file:

const HelloWorld = await hre.ethers.getContractFactory("HelloWorld");
const contract = await HelloWorld.deploy();
await contract.deployed();
console.log(`Contract deployed to ${contract.address}`);

7. Add network to the hardhat.config.js. ADVISE: don't write the private key. INSTEAD: npm install --save-dev dotenv

   1. Now on top of 'hardhat.config.js': require("dotenv").config();

   2. Inside the network config:

   url: process.env.RPC_URL, 
   accounts: [proccess.env.PRIVATEKEY]
   

   3. Create a .env file and write:

   	RPC_URL = YourNodeProviderURL
   	2. PRIVATE_KEY=c YourPrivateKey
   

   4. Write on 'deploy.js': we use the following code because etherscan is a third party and may take some time to etherscan to now that a new SC has been deployed.

   async function sleep(ms) {
     return new Promise((resolve) => {
       setTimeout(() => {
         resolve();
       }, ms);
     });
   

   Inside the function main where the contract is deployed write:

     //Delay  
     await sleep(15*1000); 
     await hre.run("verify:verify", { 
       address: contract.address, 
       //our function don´t have a constructor so we leave it empty 
       constructorArguments:[], 
     })
   

8. We also need to include the API Key to etherscan:

```
etherscan: {
    apiKey: proccess.env.ETHERSCAN_KEY,
  }
```

6. And add in the .env:

   ETHERSCAN_KEY= YOURAPI
   

7. Check if the '.env' file is included in the '.gitignore' file to protect the keys

8. Deploy the contracts on goerli:

   1. npx hardhat run scripts/deploy.js --network goerli