Payment Webhook Logging & Audit System for .NET

Payment Event Logger for ASP.NET Core

Payment integrations often fail silently—webhooks are missed, errors are hard to trace, and logs are scattered across systems.
PaymentEventLogger is a lightweight ASP.NET Core component designed to centrally log and audit payment events in real-world production systems.

This tool was extracted from an actual payment gateway integration and is designed for developers who need clear visibility into payment lifecycles.

Key features:

• Log payment events and webhook callbacks in a structured, queryable format
• Capture provider, event type, status, reference ID, payload, and error details
• Quickly debug failed or inconsistent payment states
• Easy to integrate into existing ASP.NET Core applications
• Provider-agnostic design (tested with Worldpay; adaptable for other gateways)

How it works:

1. Capture payment events or webhook callbacks in your ASP.NET Core controller
2. Call LogAsync(PaymentEvent paymentEvent) to persist the event
3. Payment events are stored in SQL for later querying, auditing, and debugging

Sample logged payment event:

{
  "id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
  "provider": "Worldpay",
  "eventType": "AUTHORIZATION_FAILED",
  "status": "Failed",
  "referenceId": "ORDER-12345",
  "payload": "{...raw webhook payload...}",
  "errorMessage": "Insufficient funds",
  "createdAt": "2026-01-06T07:26:58Z"
}

This structured format makes it easy to trace payment issues and correlate events across systems.

Ideal for:

• ASP.NET Core / C# developers
• E-commerce or fintech applications
• Teams integrating payment gateways and webhooks
• Payment auditing, reconciliation, and troubleshooting

Worldpay is a registered trademark of Worldpay, LLC. This product is an independent tool and is not affiliated with or endorsed by Worldpay.

Technical deep dive and real-world lessons: https://dev.to/ramapratheeba/debugging-worldpay-webhooks-in-aspnet-core-a1n