[Backend] scoreDecayService and scoreDecayJob are dead, broken code querying a non-existent table

[grantfox-oss]

Telegram (ask questions / claim the issue here first): https://t.me/+DOylgFv1jyJlNzM0

Why this matters

src/services/scoreDecayService.ts queries a borrowers table that does not exist in any migration (scores live in the scores table), uses console.* in src/cron/scoreDecayJob.ts, and runScoreDecayJob is never wired into index.ts. Either the decay feature is unimplemented or this is stale code that would crash if ever invoked.

Acceptance criteria

• Decide whether score decay is a real feature: if yes, rewrite against the actual scores schema and wire it into index.ts with logging and a lock; if no, delete both files
• Replace console.log/console.error with the winston logger if the code is kept
• Add a test covering whichever path is chosen
• Document the decision in the services README

Files to touch

• src/services/scoreDecayService.ts
• src/cron/scoreDecayJob.ts
• src/index.ts

Out of scope

• Designing a new decay algorithm
• On-chain score decay

[Favourof]

Hi, Maintainer I will like to work on this issue.

[MarvyNwaokobia]

I'd like to work on this issue.

I have experience debugging stale backend services and aligning service logic with actual database schemas. I'll first audit whether score decay is an active feature or unused code. If it's intended, I'll refactor it to use the existing scores table, replace all console.* usage with the Winston logger, and properly wire runScoreDecayJob into index.ts with a safe execution pattern (including locking to prevent duplicate runs). If it's not a real feature, I'll remove the unused service and cron job entirely.

In both cases, I'll add tests to cover the chosen approach and document the final decision in the services README for clarity.

[grantfox-oss]

🦊 GrantFox — @MarvyNwaokobia has been assigned to this issue as part of the Official Campaign campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #7)
2. Your PR will be reviewed by the LabsCrypt maintainers

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