import { FinTSClient } from 'openfin-ts';

const client = new FinTSClient("12345",
    "http://testbank.com/hbci",
    "customerId",
    "1234pin");

try {
  await client.connect();
  const transactions = await client.getTransactions(client.konten[0].sepaData, null, null);
  transactions.forEach(transaction => {
        //Do things with transactions
  });
  await client.close();
} catch (err) {
  //handle errors
}