[Backend] — Granular Notification Preferences

[Olowodarey]

Labels: backend, enhancement, notifications

Problem

Users can only broadly enable/disable notifications, not choose per-category channels, leading to notification fatigue and opt-outs.

Requirements

1. Add a preferences entity with per-category, per-channel toggles.
2. Add endpoints to read and update preferences.
3. Respect preferences in the notification generator before sending.
4. Default new categories to a sensible opt-in/opt-out.

Acceptance Criteria

• Users can set per-category, per-channel preferences.
• Suppressed categories are not delivered.
• New users get documented defaults.
• Tests cover preference read/update and suppression.

Files

backend/src/notifications/notifications.service.ts, backend/src/notifications/notification-generator.service.ts, backend/src/notifications/entities, backend/src/notifications/notifications.controller.ts

[morelucks]

@morelucks has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hello,

I’m a smart contract and full-stack developer interested in contributing to this issue.

I have experience contributing through OnlyDust and have participated in Drips Wave 1, Wave 2, Wave 5, as well as the GrantFox beta campaign.

My technical background includes Rust, Soroban, Cairo, Solidity, and TypeScript, with a focus on building secure, scalable, and maintainable blockchain applications.

Based on the scope of this issue, I’m confident I can deliver a complete and well-tested solution within 24 hours of assignment. I prioritize clean code, clear documentation, and efficient implementation.

I’d appreciate the opportunity to contribute and help move this issue forward.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @morelucks to this issue.

[nayt9]

@nayt9 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hello sir , my name is Nathan. I’m smart contract developer, and I’d love to contribute to this project. I’m comfortable working with modern frontend tools and blockchain technologies, and I can deliver tasks quickly often within 24 hours.
Please let me know how I can get started or if there are any issues suitable for a first contribution.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @nayt9 to this issue.

[Danitello123]

@Danitello123 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Good day maintainer
Please kindly assign me this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Danitello123 to this issue.

[devsimze]

@devsimze has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hi I'd like to work on this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @devsimze to this issue.

[drips-wave]

Congratulations, @devsimze! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

🧑‍💻 @devsimze: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

Warning

When opening a PR, please link it to this issue to ensure it gets tracked accurately. Points are awarded when this issue is marked as completed by the maintainer.

🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.

🌊 Happy Wave 🌊

[drips-wave]

This issue has been completed by @devsimze as part of the Stellar Wave Program's 7th Wave 🥳

😎 @devsimze: You earned 200 Points for completing this issue! After the current Wave ends, you'll be eligible for a percentage of the Wave's reward pool based on the percentage of total points you've earned. Learn more here. You can also Leave a review to share your experience working on this issue.

🧑‍💻 Repo maintainers: How'd the contributor do? Leave a review to share your experience working with them.