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hardhat_starter_kit

Hardhat Starter Kit

To run the code - clone this repo to your local machine

  1. In the .env file, replace the private key with your private key and remote kovan network (I used Alchemy, you can also use infura)
  2. Open the package.json file and install all the dependencies one by one
  3. run np hardhat compile to compile the code
  4. run npx hardhat run --network kovan script/scripts.js to deploy the code. You can copy the deployed address to Kovan Etherscan to see the transaction

to run the task - In this smart_contract, I have there tasks

  • The first Reads the value from the getNumber function
  • The second Set the value with the setNumber function
  • The third Gets the current value of Eth use Chainlink priceFeed

To run the task = use npx hardhat to see the list of all the available tasks

  • To read the value: npx hardhat read-value --contract contract_address
  • to set the value: npx hardhat set-value --contract contract_address new_value
  • to see the current ETH price: npx hardhat read-price --contract contract_address

To Run the TEST run npx hardhat test

Etherscan verification

To try out Etherscan verification, you first need to deploy a contract to an Ethereum network that's supported by Etherscan, such as Ropsten.

In this project, copy the .env.example file to a file named .env, and then edit it to fill in the details. Enter your Etherscan API key, your Ropsten node URL (eg from Alchemy), and the private key of the account which will send the deployment transaction. With a valid .env file in place, first deploy your contract:

hardhat run --network ropsten scripts/deploy.js

Then, copy the deployment address and paste it in to replace DEPLOYED_CONTRACT_ADDRESS in this command:

If you have a contructor that takes in a parameter, you need to add it. For example, in the case, the constructor takes in a string

npx hardhat verify --network ropsten DEPLOYED_CONTRACT_ADDRESS "Hello, Hardhat!"

Thanks you