const hre = require("hardhat");
const { ethers } = require('hardhat');

// Returns the ether balance of a given address.
async function getBalance(address) {
  const balanceBigInt = await hre.ethers.provider.getBalance(address);
  return ethers.formatEther(balanceBigInt);

// Logs the Ether balances for a list of addresses.   
async function printBalances(addresses) {
  let index = 0;
  for (const address of addresses) {
    console.log(`Addresses ${index} balance: `, await getBalance(address));

// Logs the memos stored on-chain from coffee purchases.
async function printMemos(memos) {
  for (const memo of memos) {
    const timestamp = memo.timestamp;
    const tipper = memo.name;
    const tipperAddress = memo.from;
    const message = memo.message;
    console.log(`At ${timestamp}, ${tipper} (${tipperAddress}) said: "${message}"`);

async function main() {
  const [owner, tipper, tipper2, tipper3] = await hre.ethers.getSigners();
  // const BuyMeACoffee = await hre.ethers.getContractFactory("BuyMeACoffee");
  const buyMeACoffee = await hre.ethers.deployContract("BuyMeACoffee");
  // Deploy the contract.
  await buyMeACoffee.waitForDeployment();
  console.log("BuyMeACoffee deployed to:", buyMeACoffee.target);
  // Check balances before the coffee purchase.
  const addresses = [owner.address, tipper.address, buyMeACoffee.target];
  console.log("== start ==");
  await printBalances(addresses);

  // Buy the owner a few coffees.
  const tip = { value: hre.ethers.parseEther("1") };
  await buyMeACoffee.connect(tipper).buyCoffee("Rahul", "You're a good coder", tip);
  await buyMeACoffee.connect(tipper2).buyCoffee("Suprit", "You're a good coder", tip);
  await buyMeACoffee.connect(tipper3).buyCoffee("Prasad", "You're a good coder", tip);

  // Check balances after the coffee purchase.
  console.log("== bought coffee ==");
  await printBalances(addresses);

  // Withdraw.
  await buyMeACoffee.connect(owner).withdrawTips();

  // Check balances after withdrawal.
  console.log("== withdrawTips ==");
  await printBalances(addresses);

  // Check out the memos.
  console.log("== memos ==");
  const memos = await buyMeACoffee.getMemos();

// We recommend this pattern to be able to use async/await everywhere
// and properly handle errors.
  .then(() => process.exit(0))
  .catch(error => {

1 Answer 1


buyMeACoffee.target is the address where that contract is deployed, while owner.address is the address of that account. The distinction is because the target of a contract can be changed, while the address of an account should not.

  • Thanks for the help!
    – Indul
    Aug 18, 2023 at 5:01

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