public function handle_update_order( WP_REST_Request $request ) {
		$response = [
			'success' => false,
		];

		$messages = $this->get_error_messages();

		$paypal_order_id = $request->get_param( 'order_id' );

		$order = tec_tc_orders()->by_args( [
			'status'           => tribe( Pending::class )->get_wp_slug(),
			'gateway_order_id' => $paypal_order_id,
		] )->first();

		if ( ! $order ) {
			return new WP_Error( 'tec-tc-gateway-paypal-nonexistent-order-id', $messages['nonexistent-order-id'], $order );
		}

		$recheck = $request->get_param( 'recheck' );

		if ( $recheck ) {
			return $this->handle_recheck_order( $paypal_order_id, $order );
		}

		$payer_id = $request->get_param( 'payer_id' );

		$paypal_capture_response = tribe( Client::class )->capture_order( $paypal_order_id, $payer_id );

		$debug_header = tribe( Client::class )->get_debug_header();
		if ( ! empty( $debug_header ) ) {
			$paypal_capture_response['debug_id'] = $debug_header;
		}

		if (
			'UNPROCESSABLE_ENTITY' === Arr::get( $paypal_capture_response, 'name' )
		) {
			// Flag the order as Denied.
			tribe( Order::class )->modify_status( $order->ID, Denied::SLUG, [
				'gateway_payload' => $paypal_capture_response,
			] );

			return new WP_Error( 'tec-tc-gateway-paypal-failed-capture', $messages['failed-capture'], $paypal_capture_response );
		}

		$response['success']  = true;
		$response['order_id'] = $paypal_order_id;

		return new WP_REST_Response( $response );
	}