public function process_payment( $order_id ) {

		$order = wc_get_order( $order_id );

		if ( $order->get_total() > 0 ) {
			// Mark as on-hold (we're awaiting the cheque).
			$order->update_status( apply_filters( 'woocommerce_cheque_process_payment_order_status', 'on-hold', $order ), _x( 'Awaiting check payment', 'Check payment method', 'woocommerce' ) );
		} else {
			$order->payment_complete();
		}

		// Remove cart.
		WC()->cart->empty_cart();

		// Return thankyou redirect.
		return array(
			'result'   => 'success',
			'redirect' => $this->get_return_url( $order ),
		);
	}