hardat

PREREQUISITE:

1. Solidity
2. Basic Javascript

INSTALLATION

npx hardhat

create 'contracts', 'scripts' & 'test' folders inside the project folder.

1. npm install --save-dev @nomiclabs/hardhat-waffle

2. npm install --save-dev ethereum-waffle

3. npm install --save-dev chai

4. npm install --save-dev @nomiclabs/hardhat-ethers ethers

COMPILATION

1. contracts/token.sol
2. write code for transfer & checking balance
3. cd ./contracts
4. npx hardhat compile

TEST CASES USING CHAI

1. Transfer amount from Owner to Addr1
2. Transfer amount from Owner to Addr2
3. Transfer amount from Addr1 to Addr2
4. Check sender balance before sending. [sender should have sufficient balance]
5. Verify the account balances after successful transfer.

Write all the above test cases in 'test' folder.

DEBUGGING

import below module to use import "hardhat/console.sol"

hardhat.config.js

1. ALCHEMY_API_KEY from https://dashboard.alchemyapi.io/ [You can see the key after creating the app]
2. ROPSTEN_PRIVATE_KEY from Meta Mask extension.

module.exports = {
  solidity: "0.8.9",
  networks: {
    ropsten: {
      url: `https://eth-ropsten.alchemyapi.io/v2/${ALCHEMY_API_KEY}`,
      accounts: [`${ROPSTEN_PRIVATE_KEY}`],
    },
  },
};

DEPLOYING TO LIVE NETWORK

npx hardhat run ./scripts/deploy.js