update payment method callback to be promise

assets/js/payment-methods-demo/payment-methods/stripe/payment-method.js

@@ -208,12 +208,11 @@ const CreditCardComponent = ( {
 			onChange={ onChange }
 		/>
 	);
-	useEffect( () => {}, [] );
 
 	const createSource = async ( stripeBilling ) => {
 		return await stripe.createSource( stripeBilling );
 	};
-	const onSubmit = () => {
+	const onSubmit = async () => {
 		const { billingData } = billing;
 		const stripeBilling = {
 			address: {
@@ -235,13 +234,15 @@ const CreditCardComponent = ( {
 			stripeBilling.name = `${ billingData.first_name } ${ billingData.last_name }`;
 		}
 
-		const response = createSource( stripeBilling );
+		const response = await createSource( stripeBilling );
 		if ( response.error ) {
 			// @todo set payment error
 			// return error object including any validation errors if present?
 		}
 		paymentStatus.setPaymentStatus().success( billingData, {
 			sourceId: response.source.id,
+			paymentMethod: PAYMENT_METHOD_NAME,
+			paymentRequestType: 'cc',
 		} );
 
 		// this should hook into checkout processing? Basically when the checkout