Call to undefined method pm2checkout::order_format()

[MountainMan]

Installed OSC 2.3, getting the error Call to undefined method pm2checkout::order_format() on line 157 in includes/modules/payments/pm2checkout.php

 

Here's the section of code it comes from:

 

// The KEY value returned from the gateway is intentionally broken for Test transactions so it is only checked in Production mode

if (tep_not_null(MODULE_PAYMENT_2CHECKOUT_SECRET_WORD) && (MODULE_PAYMENT_2CHECKOUT_TESTMODE == 'Production')) {

if (strtoupper(md5(MODULE_PAYMENT_2CHECKOUT_SECRET_WORD . MODULE_PAYMENT_2CHECKOUT_LOGIN . $HTTP_POST_VARS['order_number'] . $this->order_format($order->info['total'], MODULE_PAYMENT_2CHECKOUT_CURRENCY))) != strtoupper($HTTP_POST_VARS['key'])) {

$sql_data_array = array('orders_id' => (int)$insert_id,

'orders_status_id' => (int)$order->info['order_status'],

'date_added' => 'now()',

'customer_notified' => '0',

'comments' => MODULE_PAYMENT_2CHECKOUT_TEXT_WARNING_TRANSACTION_ORDER);

 

tep_db_perform(TABLE_ORDERS_STATUS_HISTORY, $sql_data_array);

}

}

 

Cant find any other reference to "order_format" in the code in my computer at all, nor any answers online.

 

Help appreciated, Thanks