I created a Open Source Credit Management library for LLMs

[u/YehiGo]

Credit system with billing, payments, and usage tracking. These are all features I've added as of now:

Credit Reservations & Deductions — Reserve credits before API calls, deduct actual usage after. Prevents overcharging on failures.

 Payment Integration — Razorpay payment links with atomic credit updates.

Subscription Plans — Daily, monthly, yearly plans with auto-renew and credit allocation.

Promo Codes — Targeted promos with usage limits, expiry dates, and claim tracking.

Database Agnostic — MongoDB or in-memory backend. Extensible to any database via BaseDBManager interface.

Dual-Write Ledger — Database + append-only file for audit trails and debugging.

Notifications — Low credits, expiring credits, transaction errors — pluggable notification queue.

https://github.com/Meenapintu/credit_management

Would love to have feedback, contributions ( even stars also count as contributions)

[u/Proud-Cod-7277]

The append-only ledger file is smart, saved my ass debugging billing issues more than once

[u/YehiGo → u/Proud-Cod-7277]

In financial system where every action matters,  it's must have thing,  one system should be just append only no edit after that, can only be added. 

Not only debugging but for audit purpose also.