/Greeter-Dapp

Primary LanguageTypeScript

Advanced Sample Hardhat Project

  1. Clone project repository

  2. Run npm install in project root directory

  3. Create .env_secret file

INFURA_API_KEY={INFURA_API_KEY}, not required
ETHERSCAN_API_KEY={ETHERSCAN_API_KEY}, not required

CONTRACT_OWNER_ADDRESS={CONTRACT_OWNER_ADDRESS}, not required
CONTRACT_OWNER_PRIVATE_KEY={CONTRACT_OWNER_PRIVATE_KEY}, not required
  1. Create .env_basic file
GAS_PRICE_IN_GWEI={GAS_PRICE_IN_GWEI}, default: 50
GAS_LIMIT={GAS_LIMIT}, default: 5000000

  1. Run npm run rebuild in project root directory

  2. Run tests: npm run test

  3. Another scripts:

Command Script Long version
Start local hardhat node npm run node npx hardhat node
Hardhat check npm run check npx hardhat check
Compile smart-contract npm run compile npx hardhat compile
Hardhat clean npm run clean npx hardhat clean
Rebuild artifacts and typechain npm run rebuild npm run clean && nom run compile
Logs full code of smart-contracs to console npm run flatten npx hardhat flatten
Hardhat test npm run test npx hardhat test
Hardhat detailed test npm run test-verbose npx hardhat test --verbose
Hardhat coverage npm run coverage npx hardhat coverage
Show all accounts on local node npm run accounts npx hardhat accounts
Deploy smart-contract to local node npm run deploy npx hardhat run scripts/deploy.ts --network localhost
Quick lint npm run lint-quick pretty-quick --staged --pattern "\*\*/_._(ts|tsx)"

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/sample-script.ts

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

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

Performance optimizations

For faster runs of your tests and scripts, consider skipping ts-node's type checking by setting the environment variable TS_NODE_TRANSPILE_ONLY to 1 in hardhat's environment. For more details see the documentation.