Ionic 3/4 PayPal CheckOut problems


I’m using a new PayPal java script sdk not checkout.js.

I need to send payment to different merchant IDs, but it seems to work only with my merchant ID where I created a SandBox as PayPal Specifications in order to use different Merchants.

I call my client ID in the header index.html as below:

And below it is my checkout script where I would like to use different merchant ID based on the object to sell. I put the specific merchant email or merchant ID in payee command, as I suppose is wrote in the PayPal instructions, for that object. The merchant should be different depend on the object to sell, but PayPal give me an error that I’m using a different payee from the client ID. Where am I wrong?

initPayPal() {

var _totaleOrdine = this.totaleOrdine.toString();

var _merchant: string = 'XXXXXXXXX';

    env: 'sandbox', // sandbox | production
      locale: 'it_IT',

    style: {
        size: 'responsive',
        color: 'gold',
        shape: 'pill',
        label: 'buynow', //                    label: checkout, buynow, credit, pay, paypal
        tagline: false


    commit: true,
    debug: true,

     createOrder: function(data, actions) {
      // Set up the transaction

        return actions.order.create({

        application_context: {
            brand_name: "MyBrand",

        purchase_units: [{

     //   reference_id:_merchant,

          amount: {
            value: _totaleOrdine,

          payee: {
            email: '',
            merchant_id: 'xxxxx'

          shipping: {
            address: {

                address_line_1: "Via Roma 10",
                address_line_2: "",
                admin_area_2: "Roma",
                admin_area_1: "RM",
                postal_code: "00100",
                country_code: "IT",


                full_name: "adam adami"

     onApprove: function(data, actions) {
      return actions.order.capture().then(function(details) {
        alert('Transaction completed by ' +;
        // Call your server to save the transaction
        return fetch('/paypal-transaction-complete', {
          method: 'post',
          body: JSON.stringify({
            orderID: data.orderID


     onCancel: function(data, actions) {
         * Buyer cancelled the payment
         console.log("Buyer cancelled the payment");

     onError: function(err) {
         * An error occurred during the transaction
         console.log("An error occurred during the transaction");