[FEATURE] Aggregate Total Fiat Balance API

[codeZe-us]

Create an API endpoint to calculate and aggregate the total available fiat balance across all connected bank accounts for the organization.

Contribution Guide

• PRs go to the dev branch, not main
• Please application must explain a short specific approach to this task
• PR description must clearly describe what you built and changed
• Link your PR to the correct issue number

Implementation Guidelines

• Key files: src/app/api/v1/dashboard/balance/route.ts, src/server/services/finance.service.ts
• Create a GET method that fetches all active bank accounts tied to the user's organization.
• Sum the balances (handling currency conversions if necessary, or assuming single currency).
• Return the aggregated total and a breakdown per account.

Expectations

• What done looks like: The endpoint successfully returns a combined fiat balance that correctly mirrors the sum of the individual accounts in the database.
• Discord for questions: codeze_us

[playmaker410]

@playmaker410 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Hi Maintainer,

I’d love to take this on. I have hands-on experience with Rust, Soroban, Cairo, and TypeScript, and I’m confident I can deliver a solid solution within 24 hours.

Happy to contribute.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @playmaker410 to this issue.

[raymondjoseph02]

@raymondjoseph02 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Hi maintainers,

I’d like to work on issue #473: “[FEATURE] Aggregate Total Fiat Balance API.”

My approach is to create a new GET endpoint in src/app/api/v1/dashboard/balance/route.ts that retrieves all active bank accounts associated with the authenticated user’s organization. I’ll move the aggregation logic into src/server/services/finance.service.ts to keep the route lightweight and maintainable.

The implementation will:

• Fetch all active organization bank accounts
• Sum the available fiat balances
• Return both the aggregated total and a per-account breakdown
• Handle currency normalization if the system supports multiple currencies, otherwise follow the project’s current single-currency assumption
• Include proper error handling and response formatting

The response structure will be designed to clearly expose:

• total balance
• currency
• account-level balances
• metadata if needed

I’ll keep the PR scoped specifically to this feature, target the dev branch, and ensure the endpoint accurately reflects the balances stored in the database.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @raymondjoseph02 to this issue.

[drips-wave]

Congratulations, @raymondjoseph02! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

🧑‍💻 @raymondjoseph02: 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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