[Contract] Storage Efficient Course Enrollment Tracking

[ayomideadeniran]

Description

Implement a gas-efficient way to track student enrollments using mapping in instance storage for global counts and persistent storage for individual enrollment status.

Requirements

• Add EnrollmentState enum (Active, Completed, Dropped).
• Use persistent() storage for student-course mapping.
• optimize Instance storage for quick lookups of total enrolled students per course.

Level

• Intermediate

Rules for Contributors

• Please add an ETA (no more than 2 days) when expressing interest.

[yunus-dev-codecrafter]

@yunus-dev-codecrafter has applied to work on this issue as part of the Stellar Wave Program's 3rd wave.

Hello, I can work on this issue and implement the required changes with proper testing and best practices. Please grant me access so I can start—I’ll complete it within 2 hours.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @yunus-dev-codecrafter to this issue.