[krish678]

I’m open-sourcing OpenTX, a production-grade payment gateway and canonical transaction protocol designed to modernize legacy ISO 8583 payment systems for cloud-native architectures.

GitHub: https://github.com/krish567366/OpenTX

Stack: Go, Protocol Buffers, Kafka, OpenTelemetry License: MIT

OpenTX provides a strongly-typed canonical transaction layer between legacy card networks and modern APIs, allowing fintech teams to decouple application logic from network-specific ISO 8583 formats.

Most payment teams still integrate directly with brittle, tightly-coupled ISO 8583 implementations. OpenTX introduces a standardized, versioned transaction model with bidirectional mapping, exactly-once semantics, message-level security, and built-in observability.

This is relevant for:

Fintech and payments startups

Infrastructure and developer tools teams

Multi-network aggregation platforms

Companies modernizing legacy financial rails

Feedback and contributions from founders and infra engineers are welcome.