Alter authorize.net transaction key dynamically? - php

Question

I am currently building an ecommerce website that is used for 5 separate companies using woocommerce and authorize.net for the payment.
So far the authorization is working great for a single vendor, the issue comes in that once I have selected the vendor by location, I need to change the api_transaction_key and api_login_id to the correct vendor before payment is processed.
I have been searching the files for hours now and cannot find where the key and id are set.
Can someone help me find where I can overwrite the key and id values to what I need?
or would it be better to create a new payment gateway for each of the vendors and copy all of the authorize.net gateway information except the key and id?

Answer 1

This answer is here for if anyone is curious on how I was able to make this work.in the Authorize.net woocommerce payment gateway you'll find a file called
class-wc-authorize-net-cim-api.php
and it is in this file's contruct function that your hook needs to be placed.
public function __construct( $api_user_id, $api_transaction_key, $environment ) {
// File default code
}
This needs the follow three lines of code to be placed BEFORE the default file code
$custom_auth_info = apply_filters('get_custom_auth', $custom_auth_info );
$api_user_id = $custom_auth_info['api_user_id'];
$api_transaction_key = $custom_auth_info['api_transaction_key'];
The apply_filters refers to the following function that is placed in my plugin
add_filter('get_custom_auth', 'select_distributor_by_state');
function select_distributor_by_state($custom_auth_info = []) {
global $wpdb;
//Your Query is here to select the proper distributor from the DB
//and retrieve their custom Authorize.net ID and Transaction Key
$custom_auth_info['api_user_id'] = $your_query[0]['api_loginid'];
$custom_auth_info['api_transaction_key'] = $your_query[0]['api_transactionkey'];
$_SESSION['dealer'] = $vendor[0]['id'];
return $custom_auth_info;
}
This filter allows you to hook in, grab the data you need, then return it and apply it directly into the code before the payment is processed.