Payment Systems
Payment Gateway Bridge for an Order Platform
A middleware service that connects an order platform's invoice system to a hosted payment gateway with server-side verification.
Development example — representative scope, no client namedProject Overview
An example architecture for platforms whose built-in billing does not support the payment provider they need.
Challenge
The order platform could create invoices but had no module for the chosen provider, and payment confirmations had to be trusted only after server-side verification.
Solution
A small bridge service creates the payment with the provider, redirects the customer to hosted checkout, verifies the webhook signature and the transaction status via API, then marks the invoice as paid exactly once.
Development Process
- 01Mapped invoice and payment states
- 02Implemented provider API client
- 03Built webhook endpoint with signature checks
- 04Added admin log and retry tools
- 05Tested in sandbox before going live
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