Wave Portal Solidity Smart Contract

• use https://www.alchemy.com/ to push smart contract to blockchain.
• Alchemy essentially helps us broadcast our contract creation transaction so that it can be picked up by miners as quickly as possible. Once the transaction is mined, it is then broadcasted to the blockchain as a legit transaction. From there, everyone updates their copy of the blockchain.

change hardhat.config.js

require("@nomiclabs/hardhat-waffle");

module.exports = {
  solidity: "0.8.0",
  networks: {
    rinkeby: {
      url: "YOUR_ALCHEMY_API_URL", // check alchemy.com
      accounts: ["YOUR_PRIVATE_RINKEBY_ACCOUNT_KEY"],
    },
  },
};

or rename .env.example to .env and update the content if .env. Then refer below to use dotenv

...
require("dotenv").config();
...
module.exports = {
...
networks: {
  rinkeby: {
    url: process.env.ALCHEMY_URL,
    accounts: [process.env.PRIVATE_KEY],
  },
},
...
}

Get your private key

MetaMask > Network "Rinkeby Test Network" > 3 dot > Account Details > Export Privatge Key

Getting some fake $

• https://app.mycrypto.com/faucet
• https://faucets.chain.link/rinkeby

Run contract on HRE

npx hardhat run scripts/run.js

Start local Ethereum Network

npx hardhat node

Deploy somart contract on local Ethereum Network

npx hardhat run scripts/deploy.js --network localhost

Deploy contract on Rinkeby Test net

npx hardhat run scripts/deploy.js --network rinkeby

Basic Sample Hardhat Project

This project demonstrates a basic Hardhat use case. It comes with a sample contract, a test for that contract, a sample script that deploys that contract, and an example of a task implementation, which simply lists the available accounts.

Try running some of the following tasks:

npx hardhat accounts
npx hardhat compile
npx hardhat clean
npx hardhat test
npx hardhat node
node scripts/sample-script.js
npx hardhat help