Query Balance in Libra Blockchain with javascript

libra_wallet_query_balance.js

const { LibraWallet, LibraClient, LibraNetwork } = require('kulap-libra')
const BigNumber = require('bignumber.js')

async function createWallet() {
  // Generate an account
  const wallet = new LibraWallet()
  const account = wallet.newAccount()

  return {
    address: account.getAddress().toHex(),
    mnemonic: wallet.config.mnemonic
  }
}

async function mint(address, amount) {
  const client = new LibraClient({ network: LibraNetwork.Testnet });
  const data = await client.mintWithFaucetService(address, BigNumber(amount).times(1e6));
  return data
}

async function queryBalance(address) {
  const client = new LibraClient({ network: LibraNetwork.Testnet });

  // Fetch latest ledger state from blockchain
  const accountState = await client.getAccountState(address)

  // balance in micro libras
  const balanceInMicroLibras = BigNumber(accountState.balance.toString())

  // balance in base unit
  const balace = balanceInMicroLibras.dividedBy(BigNumber(1e6))

  return balace.toString(10)
}

(async () => {
  // Create a wallet
  const wallet = await createWallet()
  console.log('wallet', wallet)

  // Mint 1,000 libra coins
  const mintingResult = await mint(wallet.address, 1000)
  console.log('mintingResult', mintingResult)

  // Check balance
  const balanceResult = await queryBalance(wallet.address)
  console.log('balanceResult', balanceResult)
})()