Add submitCustomerInfo function

[MissBlue00]

Task

Add a submitCustomerInfo function for SEP-12 customer information collection.

Details

• Function signature: submitCustomerInfo(customerData: CustomerData): Promise<CustomerPutResponse>
• Submit KYC data to anchor via SEP-12
• Support partial and full customer updates
• Handle file uploads for identity documents
• Add CustomerData and CustomerPutResponse interfaces

Test

Run pnpm --filter @stellar-pay/anchor-service build to verify no TypeScript errors.

[nanaabdul1172]

@nanaabdul1172 has applied to work on this issue as part of the Stellar Wave Program's 3rd wave.

I am eager to implement the submitCustomerInfo function, as my background in software engineering and front-end development has prepared me to handle the complexities of secure KYC data collection and API integration. I am proficient in TypeScript and experienced in managing multi-part form data for document uploads, ensuring that sensitive customer information is transmitted reliably to Stellar anchors in compliance with SEP-12. My focus will be on building a robust, promise-based utility that seamlessly handles both partial updates and full submissions, complete with strict interface definitions and comprehensive error handling for the various response states required by the anchor.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @nanaabdul1172 to this issue.

[drips-wave]

Congratulations, @nanaabdul1172! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on March 30, 2026.

🧑‍💻 @nanaabdul1172: 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

When opening a PR, please link it to this issue to ensure it gets tracked accurately. Points are awarded when this issue is marked as completed by the maintainer.

🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.

🌊 Happy Wave 🌊