The Authorize.Net Config ($config) is an associative array available to a number of the add-ons hooks; it is populated by the properties from the Feed Object.
Authorize.Net Feed Meta
The Feed Object meta for the Authorize.Net add-on is an associative array containing the properties which determine what type of transaction should occur and what values are sent to Authorize.Net.
Form Data ($form_data) is an associative array containing all the payment related properties for the entry being processed by the Authorize.Net add-on.
This filter can be used to modify the authorization amount before it is sent to Authorize.net.
Action hook used by Authorize.Net that fires after the payment has been captured.
This filter can be used to modify the subscription object before it is sent to Authorize.net.
Allows the transaction to be modified before authorization occurs.
This filter can be used to modify the transaction object before it is sent to Authorize.net.
This filter can be used to modify the transaction object for the subscription setup fee before it is sent to Authorize.net.