style.js

// style 1
function asynchronouslyConstructTransformedObject(order) {
  return Promise.try(() => {
    return Promise.props(Object.assign({}, order, {
      date: order.date,
      item: getItem(order.item),
      payments: Promise.map(order.payments, (paymentObject) => {
        return Promise.props({
          payment: getPayment(paymentObject.payment),
          amountCents: paymentObject.amountCents,
          states: Promise.map(paymentObject.states, (state) => {
            return getState(state);
          })
        });
      }),
      paymentMethod: getPaymentMethod(order.paymentMethod),
      user: getUser(order.user),
    }));
  });
}

// style 2
function asynchronouslyConstructTransformedObject(order) {
  return Promise.try(() => {
    const payments = Promise.map(order.payments, paymentObject =>
      Promise.props({
        payment: getPayment(paymentObject.payment),
        amountCents: paymentObject.amountCents,
        states: Promise.map(paymentObject.states, state => getState(state)),
      }));

    return Promise.props({
      ...order,
      date: order.date,
      item: getItem(order.item),
      payments,
      paymentMethod: getPaymentMethod(order.paymentMethod),
      user: getUser(order.user),
    });
  });
}

// style 3
function asynchronouslyConstructTransformedObject(order) {
  return Promise.try(() => {
    const payments = Promise.map(order.payments, paymentObject => Promise.props({
      payment:     getPayment(paymentObject.payment),
      amountCents: paymentObject.amountCents,
      states:      Promise.map(paymentObject.states, state => getState(state)),
    }));

    return Promise.props({
                     ...order,
      date:          order.date,
      item:          getItem(order.item),
                     payments,
      paymentMethod: getPaymentMethod(order.paymentMethod),
      user:          getUser(order.user),
    });
  });
}