JoomlaVM

  The following is a list of all methods that must be implemented by a shipping module’s class file.

string list_rates( Array $d )
Lists all available shipping rates.

Attention : The array $d contains the values for the cart total weight ($d['weight']) and the ID for the shipping address the user has selected ($d['ship_to_info_id']). The ship_to_info_id refers to the field user_info_id in the tables jos_users OR jos_vm_user_info. Check both for a matching entry!
 
float get_rate( Array $d )
Returns the amount for the selected shipping rate by analyzing the parameter shipping_rate_id.
float get_tax_rate( Array $d )
Returns the tax rate for this shipping module (e.g. 0.19).
boolean validate( Array $d )
Validates the value for the parameter shipping_rate_id usually using isset( $_SESSION[$shipping_rate_id] ). Assumes you have set the value in the function list_rates for each returned shipping rate.

   The following is a list of all methods that must be implemented in a payment module's class file.

string show_configuration( void )
Shows the configuration form for this payment module in the payment method form.
boolean has_configuration( void )
returns true if the payment module can be configured, false if not
boolean configfile_writeable( void )
returns true if the configuration file for that payment module is writeable, false if not
boolean configfile_readable( void )
returns true if the configuration file for that payment module is readable, false if not
void write_configuration( Array )
stores all configuration values for this payment module in the configuration file.
boolean process_payment(String $order_number, Float $order_total, Array &$d)
This is the main function for all payment modules that use direct connections to a payment gateway (like authorize.net or eWay XML). This is the place, where the payment details are validated and captured on success. Returns true on sucess, false on failure.
float get_payment_rate(Float $subtotal)
This is the function to calculate the fee / discount for this special payment module (so you can calculate a fee, depending on the order total amount).