Authorize.net Accept.js in React app

billing.js

/* services/billing.js */

/* Convert Accept.js XmlHttpRequest to Promise */
function createPaymentAsync(data) {
  return new Promise(resolve => {
    window.Accept.dispatchData(data, resolve);
  });
}

/* Parse Accept Errors */
function parseErrors(response) {
  let i = 0
  const result = []

  while (i < response.messages.message.length) {
    result.push(`${response.messages.message[i].code}: ${response.messages.message[i].text}`)
    i += 1;
  }
  return result.join('\n');
}

/*
  Refines card/bank data before pass to Accept.js
  Warning: Accept.js slightly fails when the values are not string(ex: Integer)
    Ensure that they are String.
*/
function refinedData(data) {
  const authData = {
    clientKey: process.env.REACT_APP_AUTHNET_PUBLIC_CLIENT_KEY,
    apiLoginID: process.env.REACT_APP_AUTHNET_API_LOGIN_ID,
  }

  const newData = {}
  newData.authData = authData

  if (data.profile_type === 'card') {
    const { addressAttributes, ...cardDataWithoutAddress } = data.cardData;
    newData.cardData = cardDataWithoutAddress
    newData.cardData.cardNumber = newData.cardData.cardNumber.replace(/ /g, '')
  } else {
    newData.bankData = data.bankData
  }
  return newData
}

/* Build body to send to our API backend */
function buildRequestBody(data, acceptResponse) {
  let body = { profile_type: data.profile_type }
  const { opaqueData } = acceptResponse

  if (data.profile_type === 'card') {
    body = {
      ...body,
      opaqueData,
      card: {
        month: data.cardData.month,
        year: data.cardData.year,
        address_attributes: data.cardData.addressAttributes,
      },
    }
  } else if (data.profile_type === 'ach') {
    body = {
      ...body,
      account: data.bankData.accountNumber,
      routing: data.bankData.routingNumber,
      bank_name: data.bankData.bankName,
      account_holder: data.bankData.nameOnAccount,
      account_type: data.bankData.accountType,
    }
  }

  return body
}

export function createPayment(data) {
  return createPaymentAsync(refinedData(data)).then(response => {
    if (response.messages.resultCode === 'Error') {
      return { error: { _error: parseErrors(response) } }
    }

    /* send payment result to our backend */
    return fetchData(
      '/api/customer/v1/payments',
      {
        method: 'POST',
        body: buildRequestBody(data, response),
      },
    );
  })
}

Is there any way you can help me integrate accept js into a MERN stack application? I am working on my first ecomm with authorize net and could really use a hand. Please contact me at dballowe7912@gmail.com for more details, my code is at dballowe7912 on github, under this_euphoria repository.