flexprice/flexprice-front

Wrong Frontend Calculation in Preview during Create Subscription flow

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#360 opened on Sep 16, 2025

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Description

Problem

  • As we continue to add more entities within a subscription, the calculation logic on the frontend is increasingly diverging from the backend.
  • This results in inconsistent values being displayed to users and introduces room for errors, especially as the logic becomes more complex.

Goal

Define a single source of truth for subscription-related calculations that can be consistently applied across both frontend and backend. This could involve introducing a shared rules engine (e.g., JSON-based rules or configuration-driven approach) to ensure all calculations remain accurate, maintainable, and easy to extend in the future. Open for discussion.

Contributor guide

Research direction
Investigate the frontend calculation logic and compare with backend logic. Identify discrepancies and propose a shared calculation approach.
Tech stack
typescript
Domain
frontend
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
GitTypeScript
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50