Formance Ledger

Formance Ledger is a programmable financial core ledger that gives money-moving applications a foundation for centralized state-keeping. It models accounts and balances and records atomic multi-posting transactions, which suits user-balance apps, digital asset platforms and exchanges, payment systems, and loan management.

Transactions are written in numscript, a built-in domain-specific language for modeling financial flows. PostgreSQL is the main transactional storage layer, and the ledger can ship its logs to replica data stores for OLAP-optimized querying. It can run as a standalone microservice or as part of the wider Formance Platform.

For local use, an all-in-one Docker Compose stack brings up Postgres, the ledger server and worker, a gateway, and a console UI. Production deployment is supported through an official Kubernetes operator. Standalone binaries and container images are published for each release.