ent->type;
			$this->response   = 'WPForms Square: ' . $this->event_type . ' event received.';

			$processed = $this->process_event( $event );

			$this->response_code = $processed ? 200 : 202;

			$this->respond();
		} catch ( Exception $e ) {

			$this->response      = $e->getMessage();
			$this->response_code = $e instanceof BadMethodCallException ? 501 : 500;

			$this->respond();
		}
	}

	/**
	 * Get webhook signature.
	 *
	 * @since 1.9.5
	 *
	 * @throws RuntimeException When Square signature is not set.
	 *
	 * @return string
	 */
	private function get_webhook_signature(): string {

		if ( ! isset( $_SERVER['HTTP_X_SQUARE_HMACSHA256_SIGNATURE'] ) ) {
			throw new RuntimeException( 'Square signature is not set.' );
		}

		return sanitize_text_field( wp_unslash( $_SERVER['HTTP_X_SQUARE_HMACSHA256_SIGNATURE'] ) );
	}

	/**
	 * Get webhook signing secret.
	 *
	 * @since 1.9.5
	 *
	 * @throws RuntimeException When webhook signing secret is not set.
	 *
	 * @return string
	 */
	private function get_webhook_signing_secret(): string {

		$secret = wpforms_setting( 'square-webhooks-secret-' . Helpers::get_mode() );

		if ( empty( $secret ) ) {
			throw new RuntimeException( 'Webhook signing secret is not set.' );
		}

		return $secret;
	}

	/**
	 * Process Square event.
	 *
	 * @since 1.9.5
	 *
	 * @param object $event Square event.
	 *
	 * @return bool True if event has handling class, false otherwise.
	 */
	private function process_event( $event ): bool {

		$webhooks = self::get_event_whitelist();

		// Event can't be handled.
		if ( ! isset( $webhooks[ $event->type ] ) || ! class_exists( $webhooks[ $event->type ] ) ) {
			return false;
		}

		$handler = new $webhooks[ $event->type ]();

		$handler->setup( $event );

		return $handler->handle();
	}

	/**
	 * Get event allowlist.
	 *
	 * @since 1.9.5
	 *
	 * @return array
	 */
	private static function get_event_whitelist(): array {

		return [
			'refund.updated'       => Webhooks\RefundUpdated::class,
			'payment.updated'      => Webhooks\PaymentUpdated::class,
			'payment.created'      => Webhooks\PaymentCreated::class,
			'subscription.created' => Webhooks\SubscriptionCreated::class,
			'subscription.updated' => Webhooks\SubscriptionUpdated::class,
		];
	}

	/**
	 * Check if rest verification is requested.
	 *
	 * @since 1.9.5
	 *
	 * @return bool
	 */
	private function is_rest_verification(): bool {

		// phpcs:ignore WordPress.Security.NonceVerification.Recommended
		return isset( $_GET['verify'] ) && $_GET['verify'] === '1';
	}

	/**
	 * Respond to the request.
	 *
	 * @since 1.9.5
	 */
	private function respond() {

		$this->log_webhook();

		wp_die( esc_html( $this->response ), '', (int) $this->response_code );
	}

	/**
	 * Log webhook request.
	 *
	 * @since 1.9.5
	 */
	private function log_webhook() {

		// log only if WP_DEBUG_LOG and WPFORMS_WEBHOOKS_DEBUG are set to true.
		if (
			! defined( 'WPFORMS_WEBHOOKS_DEBUG' ) ||
			! WPFORMS_WEBHOOKS_DEBUG ||
			! defined( 'WP_DEBUG_LOG' ) ||
			! WP_DEBUG_LOG
		) {
			return;
		}

		// If it is set to explicitly display logs on output, return: this would make response to Square malformed.
		if ( defined( 'WP_DEBUG_DISPLAY' ) && WP_DEBUG_DISPLAY ) {
			return;
		}

		$webhook_log = maybe_serialize(
			[
				'event_type'    => $this->event_type,
				'response_code' => $this->response_code,
				'response'      => $this->response,
				'payload'       => $this->payload,
			]
		);

		// phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_error_log
		error_log( $webhook_log );
	}

	/**
	 * Get a webhook events list.
	 *
	 * @since 1.9.5
	 *
	 * @return array
	 */
	public static function get_webhooks_events_list(): array {

		return array_keys( self::get_event_whitelist() );
	}
}
<br />
<b>Fatal error</b>:  Uncaught Error: Class 'WPForms\Integrations\Square\Api\WebhookRoute' not found in /home/emdadcar/public_html/assets/plugins/wpforms-lite/src/Integrations/Square/Square.php:257
Stack trace:
#0 /home/emdadcar/public_html/assets/plugins/wpforms-lite/src/Integrations/Square/Square.php(87): WPForms\Integrations\Square\Square-&gt;load_webhooks()
#1 /home/emdadcar/public_html/assets/plugins/wpforms-lite/src/Integrations/Loader.php(96): WPForms\Integrations\Square\Square-&gt;load()
#2 /home/emdadcar/public_html/assets/plugins/wpforms-lite/src/Integrations/Loader.php(81): WPForms\Integrations\Loader-&gt;load_integration(Object(WPForms\Integrations\Square\Square))
#3 /home/emdadcar/public_html/assets/plugins/wpforms-lite/src/Integrations/Loader.php(22): WPForms\Integrations\Loader-&gt;__construct()
#4 /home/emdadcar/public_html/wp-includes/class-wp-hook.php(353): WPForms\Integrations\Loader::get_instance('')
#5 /home/emdadcar/public_html/wp-includes/class-wp-hook.php(377): WP_Hook-&gt;apply_filters(Object(WPForms\Providers\Providers) in <b>/home/emdadcar/public_html/assets/plugins/wpforms-lite/src/Integrations/Square/Square.php</b> on line <b>257</b><br />