Fix handling for "no such customer" response for customer payment_methods query (#4561)

* Return and cache no payment methods when customer doesn't exist
* Changelog

Author: daledupreez

changelog.txt

@@ -32,6 +32,7 @@
 * Update - Copy for the Optimized Checkout settings and notices
 * Dev - Implements WooCommerce constants for the tax statuses
 * Update - Removes the ability to change the title for the Optimized Checkout payment element, as it is now set to "Stripe" by default
+* Fix - Handle missing customer when calling payment_methods API
 
 = 9.7.1 - 2025-07-28 =
 * Add - Add state mapping for Lithuania in express checkout

includes/class-wc-stripe-customer.php

@@ -719,6 +719,15 @@ public function get_payment_methods( $payment_method_type ) {
 			);
 
 			if ( ! empty( $response->error ) ) {
+				if (
+					isset( $response->error->code, $response->error->param, $response->error->type )
+					&& 'customer' === $response->error->param
+					&& 'resource_missing' === $response->error->code
+					&& 'invalid_request_error' === $response->error->type
+				) {
+					// If the customer doesn't exist, cache an empty array as a result.
+					set_transient( self::PAYMENT_METHODS_TRANSIENT_KEY . $payment_method_type . $this->get_id(), [], DAY_IN_SECONDS );
+				}
 				return [];
 			}
 

readme.txt

@@ -141,5 +141,6 @@ If you get stuck, you can ask for help in the [Plugin Forum](https://wordpress.o
 * Update - Copy for the Optimized Checkout settings and notices
 * Dev - Implements WooCommerce constants for the tax statuses
 * Update - Removes the ability to change the title for the Optimized Checkout payment element, as it is now set to "Stripe" by default
+* Fix - Handle missing customer when calling payment_methods API
 
 [See changelog for full details across versions](https://raw.githubusercontent.com/woocommerce/woocommerce-gateway-stripe/trunk/changelog.txt).