Implement quiz submission and scoring logic

[TomikeDS]

Description:

User quiz submissions must be evaluated to determine whether learning objectives have been met. Quiz results will later be used to drive progress tracking and rewards.

This issue should be implemented inside the quizzes module and may interact with the progress module.

What the contributor should solve:

• Accept quiz answers from authenticated users

• Score quiz submissions

• Store quiz results per user

• Prevent duplicate or repeated submissions where appropriate

Expected outcome:

• Quiz submissions are scored correctly

• Results are stored per user

• Invalid submissions are rejected

Complexity: Medium

[drips-wave]

This issue has been added to the Stellar Wave Program and is worth 150 Points.

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[legend4tech]

@legend4tech has applied to work on this issue as part of the Stellar Wave Program's 1st wave.

Hi am legend4tech a fullstack developer, and a top Open source Contributor (former Fellow at onlydust) I will love to work on this issue. Looking forward to be assigned.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @legend4tech to this issue.

[Arowolokehinde]

@Arowolokehinde has applied to work on this issue as part of the Stellar Wave Program's 1st wave.

can i work on this issue

I am an experienced backend engineer with deep knowledge of building scalable systems . i have a solid background in Rust and typescript

Please assign this issue to me

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

[gelluisaac]

@gelluisaac has applied to work on this issue as part of the Stellar Wave Program's 1st wave.

I’m interested in tackling this! I have a strong background in smart contract development and full-stack systems, so I'm well-equipped to handle the requirements here. Could you please assign this to me?

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

[samuelgodsgift]

@samuelgodsgift has applied to work on this issue as part of the Stellar Wave Program's 1st wave.

I have 5+ years of experience. I would love to take on this issue! Kindly assign.

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

[Jayrodri088]

@Jayrodri088 has applied to work on this issue as part of the Stellar Wave Program's 1st wave.

I am a backend developer with experience in building scoring systems and integrating them with user progress tracking and reward systems, particularly for educational platforms.

For this task, I will:

1. Accept Quiz Answers: Implement functionality to accept quiz answers from authenticated users.
2. Score Quiz Submissions: Implement the logic to score quiz submissions, evaluating whether learning objectives have been met.
3. Store Results: Ensure quiz results are stored per user, linking them to progress tracking.
4. Prevent Duplicate Submissions: Prevent users from submitting the same quiz multiple times unless appropriate, ensuring the integrity of the data.

ETA: 6 hours for implementation, testing, and validation.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Jayrodri088 to this issue.

[chibokaxavier]

@chibokaxavier has applied to work on this issue as part of the Stellar Wave Program's 1st wave.

Hi @TomikeDS, I’d like to take on the quiz submission and scoring logic. I am a full-stack developer with experience building educational platforms and curriculum tracking systems. I understand that for a platform like ByteChain, accuracy in scoring and integrity in progress tracking are essential for future reward distributions.

My Implementation Plan:

Secure Submission Flow: I will implement a robust POST endpoint in the quizzes module that validates the user's authentication and ensures the quiz ID exists before processing.

Server-Side Scoring: I’ll build a deterministic scoring engine that compares user inputs against the 'Correct Answers' stored in the database. I'll ensure this logic is purely server-side to prevent client-side manipulation of results.

Progress Integration: Upon successful scoring, I will integrate with the progress module to update the user’s curriculum state, marking the learning objective as met if the score exceeds the required threshold.

Duplicate Prevention: I’ll implement a check to prevent repeated submissions for the same quiz (unless the curriculum specifically allows retakes), using a unique composite constraint or a check in the service layer.

Atomic Result Storage: I’ll ensure quiz results are stored with full metadata (time taken, score, and attempt number) to provide a rich history for future analytics.

Type Safety: I'll define clear DTOs and interfaces to ensure the data flow between the quiz and progress modules is clean and type-safe.

I focus on building reliable backend systems for educational tech and am ready to deliver a polished, well-tested solution

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

[drips-wave]

Congratulations, @Jayrodri088! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on January 31, 2026.

🧑‍💻 @Jayrodri088: 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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[drips-wave]

This issue has been completed by @Jayrodri088 as part of the Stellar Wave Program's 1st Wave 🥳

😎 @Jayrodri088: You earned 150 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.

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[drips-wave]

@Jayrodri088 received 4 compliments:

• Good Communicator: +50 points
• Fast & Easy: +50 points
• High-Quality Code: +50 points
• Problem Solver: +50 points