Add enrollments database table to track learner course registrations

[Anuoluwapo25]

Description

The enrollments endpoint (issue #295) needs a database table to record which learners are enrolled in which courses. Currently enrollment is only tracked on-chain with no backend copy for fast queries.

What Needs to Be Done

Add to server/src/db/index.ts:

CREATE TABLE IF NOT EXISTS enrollments (
id SERIAL PRIMARY KEY,
learner_address TEXT NOT NULL,
course_id TEXT NOT NULL REFERENCES courses(id),
tx_hash TEXT,
enrolled_at TIMESTAMPTZ DEFAULT NOW(),
UNIQUE(learner_address, course_id)
);

Files Affected

• server/src/db/index.ts

Labels

backend, good first issue, help wanted, Stellar Wave

[Diaroke]

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

I would want to work on this issue because I can handle it correctly, Kindly Assign.
Thank you.

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[drips-wave]

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

🧑‍💻 @Diaroke: 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.

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