Stellar Wallet Signature Login Verification

[Olowodarey]

We need an alternative or primary login flow where users can authenticate securely by signing a nonce with their Stellar wallet.

Acceptance Criteria

• Implement GET /auth/nonce to generate and return a unique nonce (store temporarily in memory or Redis).
• Implement POST /auth/verify-signature accepting publicKey and signature.
• Verify the signature against the nonce utilizing @stellar/stellar-sdk.
• Issue a JWT to the frontend if the signature is valid and belongs to the registered public key.

Useful Resources

• Stellar Authentication Protocol (SEP-10) - Context for building custom stellar auth.

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[Ryjen1]

@Ryjen1 has applied to work on this issue as part of the Stellar Wave Program's 2nd wave.

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[DokaIzk]

@DokaIzk has applied to work on this issue as part of the Stellar Wave Program's 2nd wave.

I’d like to take on the Stellar Wallet Signature Login Verification issue. As a backend engineer with hands-on Web3 experience, I’m comfortable implementing secure signature-based authentication flows and handling wallet verification logic. I’ll ensure the solution is robust, replay-safe, and properly tested, with clean abstractions that make the login flow reliable and easy to extend.

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Congratulations, @DokaIzk! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on February 26, 2026.

🧑‍💻 @DokaIzk: 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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