Affects
Anyone learning how Lerian’s ledger works from first principles — including engineers, product teams, and implementation partners onboarding to Midaz. This is new conceptual content and does not change any runtime API behavior, endpoints, or payloads.
What changed
A new Fundamentals tab has been added to the documentation, opening with the Core Banking series. The series builds the mental model needed to design and operate a ledger, progressing from concepts to a practical ledger plan:
- What is core banking — what a core banking ledger is and the role it plays.
- Double-entry explained — why every movement has balanced debits and credits.
- Building blocks — ledgers, accounts, portfolios, and assets, and how they fit together.
- How money moves — the mechanics of transactions across accounts.
- Holders, accounts & aliases — modeling who owns what and how accounts are referenced.
- External accounts and reconciliation — representing the outside world and keeping it in sync.
- Routes and fees — directing movements and applying fees.
- Designing your ledger plan — putting the building blocks together for a real setup.
- Where to go next — pointers into the rest of the documentation.
Impact
This is a documentation-only update. There is no change to product behavior, API contracts, or configuration. No migration is required. The series is conceptual and product-agnostic, providing the foundation that the rest of the Midaz and Lerian documentation builds on.
What you need to do
1
Start at What is core banking in the Fundamentals tab to build the base mental model.
2
Follow the series through to Designing your ledger plan before modeling your own ledger.
3
Use Where to go next to jump into the relevant product documentation for implementation.