| ⇢ | B | Gateway added |
| ⇢ | F | Gateway::start() added | |
| ⇢ | B | Gateway::update_status() added | |
| ⇢ | B | Gateway::get_available_payment_methods() added | |
| ⇢ | A | Gateway::cancel_reservation() added | |
| ⇢ | A | Gateway::get_supported_payment_methods() added | |
| ⇢ | A | Gateway::create_invoice() added | |
| ⇢ | A | Gateway::format_amount() added | |
| ⇢ | A | Gateway::__construct() added | |
| ⇢ | A | Gateway::get_issuers() added | |
| ⇢ | A | Gateway::payment_method_is_required() added |