Emit Event on Subscription Cancellation

[Abd-Standard]

Description
Emit an event whenever a user cancels an active notification subscription.

Acceptance Criteria
Cancellation emits an event.
Event contains subscriber information.
Tests verify event emission

[ebubeb683-ship-it]

Hello boss, Please assign this issue to me. i checked it out and im confident i will solve it
my eta is 4 hours

[AbuTuraab]

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

Hi,

I’d like to request assignment to this issue.

As a full-stack developer working actively in the Stellar ecosystem, I understand how important robust automation is for projects that combine Soroban smart contracts, backend services, and frontend applications. A reliable CI/CD pipeline is the backbone of safe contract development, deterministic builds, and predictable testnet releases.

During the previous waves of contributions, I worked on several Stellar-related repos where I resolved issues such as:
Frontend implementations.
Misconfigured GitHub Actions leading to failing builds
Missing or incomplete Soroban contract test pipelines
Frontend pipelines that didn’t catch build/lint errors
Inefficient caching (Rust, pnpm) that slowed down CI
Incorrect workflow permissions affecting deployment and artifact uploads
These issues helped me develop a strong sense of what healthy CI/CD should look like for blockchain projects.

Relevant Skills
Full-stack expertise with Soroban, Rust, TypeScript, and modern frontend tooling
Strong experience designing and maintaining GitHub Actions workflows
Familiar with contract testing, reproducible builds, and blockchain dev best practices
Experience with pnpm-based frontend CI pipelines (install, lint, type-check, build)
Comfortable implementing secure deployment flows, secret management, and workflow permission hardening
Confident in making pipelines faster and more reliable using smart caching strategies

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

[Rayhab2000]

@Rayhab2000 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Please assign this issue to me

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Rayhab2000 to this issue.

[drips-wave]

Congratulations, @Rayhab2000! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

🧑‍💻 @Rayhab2000: 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

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🌊 Happy Wave 🌊

[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox as part of the Official Campaign | FWC26 campaign!

@Rayhab2000's PR #468 was approved and merged by @Abd-Standard.

🏆 @Rayhab2000: You earned 35 FoxPoints for this contribution! Your current tier: Explorer (446 total points). Track your full progress on GrantFox.

👏 Great work, @Rayhab2000! Keep contributing to Core-Foundry.

[drips-wave]

This issue has been completed by @Rayhab2000 as part of the Stellar Wave Program's 7th Wave 🥳

😎 @Rayhab2000: 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.

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