Distributed ledger core

A distributed ledger core system, comprising:

• a blockchain-based distributed ledger system comprising:
• a distributed banking ledger;
• and
• a plurality of distributed computer nodes, wherein a consensus algorithm operating on the plurality of distributed computer nodes in the blockchain-based distributed ledger system updates the distributed banking ledger in which multiple copies of the distributed banking ledger exist across the plurality of distributed computer nodes;
• a client system for a client;
• a banking ledger;
• a ledger interoperability service that facilitates interactions between the distributed banking ledger and the banking ledger;
• a posting generation service;
• a posting execution service;
• and
• a data services module;
• wherein:
• the distributed banking ledger is configured to receives transaction request for a transaction from a client via an Application Programming Interface (API) from the client system;
• a smart contract executed on the distributed banking ledger is configured to create a pending transaction for the transaction on the distributed banking ledger;
• the smart contract is configured to notify the client system of the pending transaction;
• the smart contract is configured to send a posting request for the pending transaction to the ledger interoperability service;
• the posting generation service is configured to generate accounting movements for the transaction;
• the posting execution service is configured to post the accounting movements and providing posting details to the ledger interoperability service;
• the ledger interoperability service, the posting generation service, and/or the posting execution service is configured to validate the posting details with a data services module;
• the smart contract is configured to receive a posting validation complete notification from the posting execution service via the ledger interoperability service;
• the smart contract is configured to settle the transaction on the distributed banking ledger by writing the transaction as a new block to the distributed banking ledger;
• the smart contract is configured to send a posting complete acknowledgement to the posting execution service via the ledger interoperability service;
• the posting execution service is configured to generate a transaction request complete posting;
• the posting generation service is configured to execute the transaction request complete posting and returning a transaction complete posting to the distributed banking ledger via the ledger interoperability service;
• and
• the smart contract is configured to send a completion notification to the client.