Declare gateway supported features so PayPal shows on block cart/checkout for multi-subscription carts

Author: Dinamiko

modules/ppcp-blocks/resources/js/checkout-block.js

@@ -27,15 +27,23 @@ initCartFragmentSync();
 
 let paypalScriptPromise = null;
 
-const features = [ 'products' ];
+// Mirror the gateway's server-side (mode-aware) `supports` so WooCommerce Blocks
+// does not filter the PayPal method out when the cart requires a feature the
+// gateway actually supports — notably `multiple_subscriptions` when the cart holds
+// two or more subscriptions. Falls back to the previous hard-coded list.
+const features = Array.isArray( config.supportedFeatures )
+	? [ ...config.supportedFeatures ]
+	: [ 'products' ];
 let blockEnabled = true;
 
 if ( cartHasSubscriptionProducts( config.scriptData ) ) {
 	// Show the button only for subscription carts PayPal can process
 	// (shared rule used by the classic cart and mini-cart as well).
 	blockEnabled = paypalSubscriptionButtonAllowed( config.scriptData );
 
-	features.push( 'subscriptions' );
+	if ( ! Array.isArray( config.supportedFeatures ) ) {
+		features.push( 'subscriptions' );
+	}
 }
 
 if ( blockEnabled ) {

modules/ppcp-blocks/src/PayPalPaymentMethod.php

@@ -259,6 +259,10 @@ public function get_payment_method_data() {
 			'placeOrderButtonText'        => $this->place_order_button_text,
 			'placeOrderButtonDescription' => $this->place_order_button_description,
 			'enabledFundingSources'       => $funding_sources,
+			// The gateway's (mode-aware) supported features, so the block can
+			// declare them to WooCommerce Blocks and not be filtered out when the
+			// cart requires one (e.g. `multiple_subscriptions` for 2+ subscriptions).
+			'supportedFeatures'           => array_values( (array) $this->gateway->supports ),
 			'ajax'                        => array(
 				'update_shipping' => array(
 					'endpoint' => WC_AJAX::get_endpoint( UpdateShippingEndpoint::ENDPOINT ),