Build comprehensive webhook notification system for event-driven integrations

[Smartdevs17]

Description

Create a reliable webhook delivery system that notifies external services about payment events (completed, failed, disputed) with retries, signatures, and delivery tracking.

Acceptance Criteria

• Webhook registration with secret token generation
• HMAC-SHA256 signature for payload integrity
• Retry queue with exponential backoff (max 5 retries)
• Delivery analytics (success rate, latency, payload size)
• Webhook testing endpoint with sample payloads
• Rate limiting per webhook endpoint

Technical Scope

• backend/src/services/webhooks.ts
• backend/src/services/webhooks/verification.ts
• backend/src/routes/webhooks.ts
• frontend/app/dashboard/webhooks/page.tsx
• Edge: downstream downtime, payload size limits, duplicate delivery detection

[TheShnider]

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Hi. I have reviewed this issue and would like to work on it.

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[Jerry-Tekh]

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Hello maintainer, I'm confident to work on this issue. Permit me work on this issue.

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[serverlessdomain-hash]

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

I'm a full-stack developer and I'd like to take this issue.
I understand the requirements and will follow the existing project structure, keep the implementation clean, and include proper tests where applicable.

ETA: 1–3 days (depending on scope)

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

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