XUMM Sign Request & on ledger transaction balance changes

index.js

const {XummSdk} = require('xumm-sdk')
const {TxData} = require('xrpl-txdata')

const Sdk = new XummSdk('xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx', '...')
const Verify = new TxData()

const main = async () => {
  const appInfo = await Sdk.ping()
  console.log(appInfo.application.name)

  const request = {
    "txjson": {
      "TransactionType": "Payment",
      "Destination": "rMdG3ju8pgyVh29ELPWaDuA74CpWW6Fxns",
      "DestinationTag": 1700585980,
      "Amount": "1000000"
    },
    "user_token": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
  }

  const subscription = await Sdk.payload.createAndSubscribe(request, event => {
    console.log('New payload event:', event.data)

    // The event data contains a property 'signed' (true or false), return :)
    if (Object.keys(event.data).indexOf('signed') > -1) {
      return event.data
    }
  })

  console.log('New payload created, URL:', subscription.created.next.always)
  console.log('  > Pushed:', subscription.created.pushed ? 'yes' : 'no')

  const resolveData = await subscription.resolved

  if (resolveData.signed === false) {
    console.log('The sign request was rejected :(')
  } else {
    console.log('Woohoo! The sign request was signed :)')
    /**
     * Let's fetch the full payload end result and check for
     * a transaction hash, to verify the transaction on ledger later.
     */
    const result = await Sdk.payload.get(resolveData.payload_uuidv4)
    const verifiedResult = await Verify.getOne(result.response.txid)
    console.log('On ledger balance changes:', verifiedResult.balanceChanges)
  }  
}

main()