[Backend] Build Allbridge Query and Tracking APIs

[ONEONUORA]

Description

Implement backend API endpoints to support Allbridge cross-chain routing and confirmation:

• GET /api/allbridge/tokens: Fetches and caches the list of supported Allbridge chains, tokens, and bridge routes.
• POST /api/allbridge/quote: Computes fee estimates, slippage, and swap rates for bridging origin assets.
• Verification Daemon: Create a polling worker to verify the status of Allbridge cross-chain transfers via tx-hash before committing new plans to PostgreSQL.

Acceptance Criteria

• Endpoints return correctly structured payloads mapping to Allbridge API/SDK.
• Local PostgreSQL records the origin tx hash, target token amount, and bridging fees.
• Thread-safe background monitoring with proper error logging for failed or stuck bridge transactions.

[daRk8238]

@daRk8238 has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi team,
I’d like to take on issue #848 — [Backend] Build Allbridge Query and Tracking APIs.
I have experience building backend APIs, integrating third-party bridging services, and working with background workers in Node.js/Python (or your stack).
Plan:

Implement GET /api/allbridge/tokens with caching
Build POST /api/allbridge/quote for fee, slippage, and route calculations
Create a polling verification daemon to track cross-chain transfers via tx-hash
Store relevant data (origin tx, target amount, fees) in PostgreSQL
Ensure thread-safety, error logging, and proper payload mapping

I can start working on this immediately and deliver clean, well-tested endpoints.
Please assign #848 to me if it’s available. Happy to discuss any details.
Thank you!

ℹ️ Repo Maintainers: To accept this application, review their application or assign @daRk8238 to this issue.

[jesutobaadedejidev]

I would like to work on this issue. Do assign it to me

[SamixYasuke]

@SamixYasuke has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi Maintainer, I'd like to work on this task by implementing the Allbridge query APIs, bridge quote endpoint, and a thread-safe verification worker to track cross-chain transfers and persist verified bridge data to PostgreSQL. Thanks.

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

[grantfox-oss]

🦊 GrantFox — @daRk8238 has been assigned to this issue as part of the Official Campaign campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #848)
2. Your PR will be reviewed by the Fracverse maintainers

Good luck! Track your progress on GrantFox.

[drips-wave]

Congratulations, @daRk8238! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 30, 2026.

🧑‍💻 @daRk8238: 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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