Custom plugin configuration field

Shopware 6 (English) Programming (EN)
1

Hello,

How exactly do you create custom fields? What Im trying to do is get all the shopware payment methods, loop them and for every payment method id a text field would be able to map some value to the payment method id.

What I have currently done:

config.xml

        <component name="payment-method-mapper">
            <name>mappedPaymentMethods</name>
            <entity>payment_method</entity>
            <label>Choose a payment methods for the plugin configuration</label>
        </component>

payment-method-mapper.html.twig

<sw-text-field v-model="$parent.value"></sw-text-field>

Currently Im able to get the all the shopware payment methods and display a text field but writing doesnt save any value. I would also would like to know how would I go about saving as a JSON of the mapped values?