Fix undefined type key warning (#4487)

* Address undefined type key warning

* Add changelog entries

* Fallback to blank type

* Update changelog entries

* Fix changelog entry

* Follow the standard option defaults

https://developer.woocommerce.com/docs/block-development/cart-and-checkout-blocks/additional-checkout-fields/#general-options

* Update changelogs

Author: malithsen

changelog.txt

@@ -18,6 +18,7 @@
 * Fix - No such customer error when creating a payment method with a new Stripe account
 * Fix - Validate create customer payload against required billing fields before sending to Stripe
 * Update - Enhanced logging system with support for all log levels and improved context handling
+* Fix - Set default values for custom field options
 
 = 9.6.0 - 2025-07-07 =
 * Fix - Register Express Checkout script before use to restore buttons on “order-pay” pages

includes/payment-methods/class-wc-stripe-express-checkout-custom-fields.php

@@ -198,9 +198,9 @@ public function get_custom_checkout_fields( $context = '' ) {
 				foreach ( $additional_fields as $field_key => $field ) {
 					$block_custom_checkout_fields[ $field_key ] = [
 						'label'    => $field['label'],
-						'type'     => $field['type'],
+						'type'     => $field['type'] ?? 'text',
 						'location' => $checkout_fields->get_field_location( $field_key ),
-						'required' => $field['required'],
+						'required' => $field['required'] ?? false,
 					];
 				}
 
@@ -223,9 +223,9 @@ public function get_custom_checkout_fields( $context = '' ) {
 
 					$classic_custom_checkout_fields[ $field_key ] = [
 						'label'    => $field['label'],
-						'type'     => $field['type'],
+						'type'     => $field['type'] ?? 'text',
 						'location' => $fieldset,
-						'required' => $field['required'],
+						'required' => $field['required'] ?? false,
 					];
 				}
 			}

readme.txt

@@ -128,5 +128,6 @@ If you get stuck, you can ask for help in the [Plugin Forum](https://wordpress.o
 * Fix - No such customer error when creating a payment method with a new Stripe account
 * Fix - Validate create customer payload against required billing fields before sending to Stripe
 * Update - Enhanced logging system with support for all log levels and improved context handling
+* Fix - Set default values for custom field options
 
 [See changelog for full details across versions](https://raw.githubusercontent.com/woocommerce/woocommerce-gateway-stripe/trunk/changelog.txt).