วิธีการสร้าง Custom Task สำหรับ Hardhat

npx hardhat run <SCRIPT_FILE>
npx hardhat test

yarn init -y
yarn add hardhat -D

npx hardhat


888    888                      888 888               888
888    888                      888 888               888
888    888                      888 888               888
8888888888  8888b.  888d888 .d88888 88888b.   8888b.  888888
888    888     "88b 888P"  d88" 888 888 "88b     "88b 888
888    888 .d888888 888    888  888 888  888 .d888888 888
888    888 888  888 888    Y88b 888 888  888 888  888 Y88b.
888    888 "Y888888 888     "Y88888 888  888 "Y888888  "Y888

👷 Welcome to Hardhat v2.9.3 👷‍

✔ What do you want to do? · Create a basic sample project
✔ Hardhat project root: · /Users/chai/dev/hardhat-tasks-example
✔ Do you want to add a .gitignore? (Y/n) · y
✔ Do you want to install this sample project's dependencies with yarn (@nomiclabs/hardhat-waffle ethereum-waffle chai @nomiclabs/hardhat-ethers ethers)? (Y/n) · y

task("accounts", "Prints the list of accounts", async (taskArgs, hre) => {
  const accounts = await hre.ethers.getSigners();

  for (const account of accounts) {
    console.log(account.address);
  }
});

npx hardhat

npx hardhat --help

Hardhat version 2.9.3

Usage: hardhat [GLOBAL OPTIONS] <TASK> [TASK OPTIONS]

GLOBAL OPTIONS:

  --config           	A Hardhat config file.
  --emoji            	Use emoji in messages.
  --help             	Shows this message, or a task's help if its name is provided
  --max-memory       	The maximum amount of memory that Hardhat can use.
  --network          	The network to connect to.
  --show-stack-traces	Show stack traces.
  --tsconfig         	A TypeScript config file.
  --verbose          	Enables Hardhat verbose logging
  --version          	Shows hardhat's version.


AVAILABLE TASKS:

  accounts	Prints the list of accounts
  check   	Check whatever you need
  clean   	Clears the cache and deletes all artifacts
  compile 	Compiles the entire project, building all artifacts
  console 	Opens a hardhat console
  flatten 	Flattens and prints contracts and their dependencies
  help    	Prints this message
  node    	Starts a JSON-RPC server on top of Hardhat Network
  run     	Runs a user-defined script after compiling the project
  test    	Runs mocha tests

To get help for a specific task run: npx hardhat help [task]

accounts	Prints the list of accounts

task("ahoy", "Prints Hello World", async (taskArgs, hre) => {
  console.log("Hello World!");
});

AVAILABLE TASKS:

  accounts	Prints the list of accounts
  ahoy    	Prints Hello World

npx hardhat ahoy

Hello World!

task("balance", "Prints an account's balance")
  .addParam("account", "The account's address")
  .setAction(async (taskArgs) => {
    const account = taskArgs.account;
    const balance = await hre.ethers.provider.getBalance(account);
    console.log(`Account balance : ${balance}`);
  });

npx hardhat balance --account 0x90F79bf6EB2c4f870365E785982E1f101E93b906

task("balance", "Prints an account's balance")
  .addOptionalParam("account", "The account's address")
  .setAction(async (taskArgs) => {
    const account = taskArgs.account || (await hre.ethers.getSigner()).address;
    const balance = await hre.ethers.provider.getBalance(account);
    console.log(`Account balance : ${balance}`);
  });

task(
  'block-number',
  'Prints the current block number',
  async (taskArgs, hre) => {
    await hre.ethers.provider.getBlockNumber().then((blockNumber) => {
      console.log(`Block number : ${blockNumber}`);
    });
  }
);

require('./tasks/block-number');

npx hardhat block-number