GitHub Daily Series #20: Payment Infrastructure Sprint and ISO 8583 Tooling on March 4
As of 2026-03-04 22:12 JST (public events): 7 active repositories, 9 events, and 9 public commits (+18,811 / -129) across payment and ISO 8583 infrastructure work.
This is episode 20 of the GitHub daily series, covering public GitHub work on March 4, 2026 (JST), with data captured at 22:12 JST.
Public snapshot so far: 7 repositories updated with 9 public events in total (4 CreateEvents, 2 PublicEvents, 3 PushEvents). Across all public commits on the day, activity totals 9 commits and +18811 / -129 lines changed.
gmo-pg-payment-demo started a GMO-PG credit card payment demo line (Spring Boot 3.4) and then received a follow-up bug-fix commit, totaling 2 commits and +1826 / -25 lines changed today. Repo: https://github.com/nktkt/gmo-pg-payment-demo
iso8583-parser was created and then advanced with a completion commit, totaling 2 commits and +2376 / -104 lines changed. The repository implements a zero-dependency ISO 8583 parser in Java 21 with BCD codec, bitmap handling, LLVAR/LLLVAR parsing, and TCP transport. Repo: https://github.com/nktkt/iso8583-parser
cardnet-iso8583-simulator-rust was launched as a Rust implementation of a CARDNET ISO 8583 simulator, including BCD pack/unpack, a mock acquirer server, terminal client, and interactive console. Repo: https://github.com/nktkt/cardnet-iso8583-simulator-rust
3ds-payment-demo was launched as a 3D Secure 2.x payment demo with mock 3DS Server, Directory Server, and ACS components on Spring Boot. Repo: https://github.com/nktkt/3ds-payment-demo
pan-tokenizer and cardnet-gateway were also made public today, extending the payment stack with Rust gRPC PAN tokenization and a Spring Boot/WebFlux ISO 8583 multiplexing gateway. Repos: https://github.com/nktkt/pan-tokenizer https://github.com/nktkt/cardnet-gateway
nktkt (profile repository) received a maintenance push (+6 / -0) to add the latest projects and keep the daily-series navigation aligned. Repo: https://github.com/nktkt/nktkt
Repository links: https://github.com/nktkt/gmo-pg-payment-demo https://github.com/nktkt/cardnet-iso8583-simulator-rust https://github.com/nktkt/iso8583-parser https://github.com/nktkt/3ds-payment-demo https://github.com/nktkt/pan-tokenizer https://github.com/nktkt/cardnet-gateway https://github.com/nktkt/nktkt