PaymentForm | takes credit card and address information | Validation library

I have an ngForm in Angular material with some input fields. I'd like to submit the new field total to the ngForm that isn't an input field, so it should be a readonly field and its value should come from the ts file of the component to which this html file is linked. How can I do it? At the moment, in the ts file I already have the total property with the value that should be submitted in the ngForm, but I don't know how to submit it. I need that the total is set, into the ngForm, with name total , in the same way as, for example, the expiration is set with name expiration into the ngForm.

The following is my html file at the moment:

I'm trying to create a payment method using nextJs library from stripe, like this:

I'm developing an e-commerce with back-end in Spring boot and front-end in Angular material. When I'm in the payment page of the browser, after a click event on the button Pay, I'd like that an order, that is related to the payment on which the click event occured, is created but I don't know how to do this thing. The problem is that, when I create an object of type Payment after the click event, this object (due to the 1:1 relationship between Payment and Order) needs an object of type Order (as shown in the following entities) and I don't know how to create it from the front-end and connect it with the relative Payment object.

BACK-END

Order entity:

I have these two models :

I'm working on integrating payment forms from a third party, by using the Link to Javascript they provide.

when I place the code in the index.html page its works just fine, but when I move the code to the component template is not working, below is part of the code:

this is the script code to initialize the payment form:

I have 3 micro-services as following communicating via masstransit/rabbitmq

I'd like that the Api makes request to the TransactionService but got the response from the PspService.

I am trying to fetch data from my local storage in my app.js component and passing it to other components using context api hook. Using that data I am displaying my Cart but when I reload my cart page my cart get empty .I have used Object.keys() method to convert my object keys into array.

my App.js Code

Autofill is triggering separately for billing and for contact information.

For example, when I click on any of the following 4 input fills it offers autofill for them => first name, last name, phone number and email. When I click on any of the following 4 it triggers autofill for them together => billing address, billing postal-code, billing country, billing city.

Autofill works well for each of the two groups, but I want it to be one group that will autofill by selecting any of the 8 input fields.

Code example (I'm using Angular 8 with Material design components but I think this shouldn't pose as a distraction since I see this as a HTML issue):

My stripe checkout page i have a section in the from for billing information using html (none stripe form)

when a user submits the form, this ajax is fired, to validate the billing information section (name, email etc)