Setting POS discounts (with App Bridge)

setting-pos-discounts.js

var discountPayload = {
  amount: '1',
  discountDescription: "$1 off discount",
  type: 'flat',
}
var unsubscriber = cart.subscribe(Cart.Action.UPDATE, function (payload: Cart.Payload) {
  console.log('[Client] setDiscount', payload);
  unsubscriber();
});
cart.dispatch(Cart.Action.SET_DISCOUNT, {
  data: discountPayload
});


```

`app.getState('pos.user').then((user) => {
});