function payment() {

    try {
      failSafeMessage('In progress');
    } catch { }

    transferMoney();
    failSafeMessage('Done');
}

function failSafeMessage(message) {
    try {
      moduleA.show(message);
    } catch {
      try {
        moduleB.show(message);
      } catch {
        alert(message);
      }
    }
}