woocommerce-paypal-payments/modules/ppcp-blocks/src/BlocksModule.php

<?php
/**
 * The blocks module.
 *
 * @package WooCommerce\PayPalCommerce\Blocks
 */

declare(strict_types=1);

namespace WooCommerce\PayPalCommerce\Blocks;

use Automattic\WooCommerce\Blocks\Payments\PaymentMethodRegistry;
use WooCommerce\PayPalCommerce\Button\Assets\SmartButton;
use WooCommerce\PayPalCommerce\Vendor\Dhii\Container\ServiceProvider;
use WooCommerce\PayPalCommerce\Vendor\Dhii\Modular\Module\ModuleInterface;
use WooCommerce\PayPalCommerce\Vendor\Interop\Container\ServiceProviderInterface;
use WooCommerce\PayPalCommerce\Vendor\Psr\Container\ContainerInterface;

/**
 * Class BlocksModule
 */
class BlocksModule implements ModuleInterface {
	/**
	 * {@inheritDoc}
	 */
	public function setup(): ServiceProviderInterface {
		return new ServiceProvider(
			require __DIR__ . '/../services.php',
			require __DIR__ . '/../extensions.php'
		);
	}

	/**
	 * {@inheritDoc}
	 */
	public function run( ContainerInterface $c ): void {
		if ( class_exists( 'Automattic\WooCommerce\Blocks\Payments\Integrations\AbstractPaymentMethodType' ) ) {
			add_action(
				'woocommerce_blocks_payment_method_type_registration',
				function( PaymentMethodRegistry $payment_method_registry ) use ( $c ): void {
					$payment_method_registry->register( $c->get( 'blocks.method' ) );
				}
			);

			woocommerce_store_api_register_payment_requirements(
				array(
					'data_callback' => function() use ( $c ): array {
						$smart_button = $c->get( 'button.smart-button' );
						assert( $smart_button instanceof SmartButton );

						if ( isset( $smart_button->script_data()['continuation'] ) ) {
							return array( 'ppcp_continuation' );
						}

						return array();
					},
				)
			);
		}
	}

	/**
	 * Returns the key for the module.
	 *
	 * @return string|void
	 */
	public function getKey() {
	}
}