Formance

Money moving inside a product is usually reconstructed from database rows that were never designed to serve as an accounting record. Formance is a developer platform for modeling and running those flows, assembled from components that work together as one stack or separately as standalone services and libraries.

The stack ships as a collection of binaries with optional Docker images, configured through command line options and environment variables. The recommended deployment is a Kubernetes cluster using the official Helm charts. A command line tool creates a sandbox stack, commits a first ledger transaction and opens the control dashboard.

Components can be adopted one at a time.

• Ledger: a programmable double-entry store acting as the immutable record of internal money movements.
• Payments: a unified API and data layer over payment processing.
• Numscript: a language and virtual machine for modeling monetary computations and transactions.
• PostgreSQL: the main storage backend behind the services.
• Kafka or NATS: asynchronous communication between services.
• Traefik: the HTTP gateway sitting in front of the stack.

This repository is the public monorepo that imports versioned service submodules and supplies a common infrastructure layer, a transition the project describes as still in progress. Sandbox stacks are meant for testing rather than production, and the documentation site covers the supported production path.