Send Ethers Programmatically

transfer.js

const { ethers } = require('hardhat')

const toWei = (num) => ethers.utils.parseEther(num.toString())
const fromWei = (num) => ethers.utils.formatEther(num)

const sendEthers = async (recipientAddress, amountInWei) => {
  return new Promise(async (resolve, reject) => {
    const privateKey =
      '0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80'
    const provider = new ethers.providers.JsonRpcProvider(
      'http://localhost:8545',
    )
    const wallet = new ethers.Wallet(privateKey, provider)
    const gasPrice = provider.getGasPrice()
    const nonce = provider.getTransactionCount(wallet.address, 'latest')

    const transaction = {
      to: recipientAddress,
      value: amountInWei,
      gasPrice,
      gasLimit: ethers.utils.hexlify(100000),
      nonce,
    }

    await wallet
      .sendTransaction(transaction)
      .then((transactionHash) => resolve(transactionHash))
      .catch((error) => reject(error))
  })
}

const getBalance = async (walletAddress) => {
  return new Promise(async (resolve, reject) => {
    const provider = new ethers.providers.JsonRpcProvider(
      'http://localhost:8545',
    )
    await provider
      .getBalance(walletAddress)
      .then((balanceInWei) => resolve(balanceInWei))
      .catch((error) => reject(error))
  })
}

async function main() {
  ;[sender, receiver] = await ethers.getSigners()
  const amountInWei = toWei(4.7)

  console.log('\n')
  let balance = await getBalance(sender.address)
  console.log('Sender balance before transfer: ', fromWei(balance))
  balance = await getBalance(receiver.address)
  console.log('Receiver balance before transfer: ', fromWei(balance))
  console.log('\n')

  await sendEthers(receiver.address, amountInWei).then((data) =>
    console.log('Transaction Details: ', data),
  )
  console.log('\n')

  balance = await getBalance(sender.address)
  console.log('Sender balance after transfer: ', fromWei(balance))
  balance = await getBalance(receiver.address)
  console.log('Receiver balance after transfer: ', fromWei(balance))
  console.log('\n')
}

main().catch((error) => {
  console.error(error)
  process.exitCode = 1
})