WiP: Add referral bonus when user use "top-up wallet" + minimum top-up amount needed for bonus

[Buda9]

Still WiP, but I might need your help with further instructions.

This new functionality has been implemented in the referral program that allows the referral bonus to be awarded when referred user top-up's their wallet. Correct me if I'm wrong, but as far as I know this is currently only possible when referred user buys Moodle course, right? Also, I added a setting for the minimum amount of the required top-up in order to obtain a reference credit has been added.

[Buda9]

Still work in progress (WiP). I tested it using paygw_bank plugin but I didn't receive referral gift amount to my wallet. Don't know what's wrong

[fmido88]

This function is not used any more as it is deprecated
I only keep it because other plugins still used it and will be deleted soon

We could add this to the class balance_op

[fmido88]

I need push access to modify

[Buda9]

I need push access to modify

I enabled "Allow edits by maintainers". Do you know if this is enough?

[Buda9]

I did everything in my power to make this work, but it's not fully working. Referral amount is not being released.

If you find some free time could you please take a look into this? I left debug output, and it seems that the referral process is not being triggered because there's no unreleased hold gift record for the user attempting the top-up. Which is currently my main issue right now.

Here's the current process:

1. The top-up process is being initiated correctly.
2. The system is checking for a hold gift record, but it's not finding one:
   PHP Notice: Checking hold gift record for user 14303
   PHP Notice: No hold gift record found for user 14303

This suggests that the issue is occurring before the top-up process. The referral record (hold gift) is not being created when a user registers using a referral link.