[Backend] User Wallet Management API

[Olowodarey]

📋 Description

Build endpoints for users to link/unlink Stellar wallets and manage multiple wallet addresses.

Acceptance Criteria

• POST /users/wallets/link to link new Stellar wallet with signature verification
• DELETE /users/wallets/:address/unlink to remove wallet
• GET /users/wallets to list all linked wallets
• PATCH /users/wallets/:address/set-primary to set primary wallet
• Verify wallet ownership via signed message
• Prevent duplicate wallet linking across users
• Emit events for wallet changes

Tasks

• Create wallet management endpoints
• Implement signature verification
• Add duplicate prevention
• Implement primary wallet logic
• Add event emission
• Write tests

[yusstyle]

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

Hello I would love to work on this

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

[devxsameer]

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

I’d like to take this issue. I’m a backend-leaning full stack developer with experience in wallet integrations and secure ownership verification, and I can implement the wallet management APIs with signature validation, duplicate prevention, primary wallet handling, and event emission while keeping the logic robust and well-tested.

ETA: 4–5 hours.

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

[Haroldwonder]

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

Let me work on this, please

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

[drips-wave]

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

🧑‍💻 @Haroldwonder: 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 🌊

[drips-wave]

This issue has been completed by @Haroldwonder as part of the Stellar Wave Program's 3rd Wave 🥳

😎 @Haroldwonder: 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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