Operations and Execution
Customer Billing
sd-customer-billing · bian-operations
A BIAN service domain in Operations and Execution. It applies the Process functional pattern to the Customer Bill, with the Customer Bill Procedure as its control record — one independent Spring Boot microservice on the platform's Cilium eBPF mesh.
View repository ↗The 162-domain platform ↗
Business DomainAccount Management
Functional PatternProcess
Asset TypeCustomer Bill
Control RecordCustomer Bill Procedure
USEWhat it is used for
Representative use cases for the Customer Billing service domain within a BIAN-aligned core-banking landscape.
- Open, service, block, and close Customer Bill records with full posting history
- Post deposits/withdrawals with balance and overdraft/minimum rules enforced
- Stream transaction events to fraud monitoring and customer notifications
- Drive interest accrual/fees and feed the general ledger
APIBIAN semantic API
The control record (Customer Bill Procedure) is exposed through uniform BIAN action terms. Java 21 · Spring Boot 3, OpenAPI at /swagger-ui.html, health at /actuator/health.
| Method | Path | BIAN action |
|---|
| GET | /v1/service-domain | Service metadata |
| POST | /v1/customer-bill-procedure/initiate | Initiate |
| GET | /v1/customer-bill-procedure/{crId}/retrieve | Retrieve |
| PUT | /v1/customer-bill-procedure/{crId}/update | Update |
| PUT | /v1/customer-bill-procedure/{crId}/control | Control (suspend / resume / terminate) |
INTBackend integrations
The systems and standards a real deployment of Customer Billing would transact with.
- Core ledgers: Thought Machine Vault, Mambu, Temenos, Finacle
- Statements/comms: Quadient, OpenText Exstream
- Billing: Zuora, SAP BRIM
RUNRun it yourself
Each service domain is its own standalone Spring Boot repository — clone and run in seconds, or deploy onto Kubernetes with the bundled Helm chart behind the Cilium mesh.
# run this service domain standalone
git clone https://github.com/Sreenivas-Sadhu-Prabhakara/sd-customer-billing
mvn -f sd-customer-billing spring-boot:run
curl localhost:8080/v1/service-domain
# or deploy onto Kubernetes (Cilium eBPF mesh)
helm upgrade --install sd-customer-billing ./helm -n bian-operations
FAQQuestions
What is the BIAN “Process” functional pattern?
A Process service domain executes and tracks a defined operational procedure, step by step, to completion. Customer Billing applies it to the Customer Bill.
What is a BIAN service domain?
BIAN (the Banking Industry Architecture Network) decomposes a bank into independent service domains, each owning exactly one business capability. Customer Billing is the service domain for Account Management; it manages the Customer Bill Procedure and exposes it through standard BIAN action terms.
What business area does Customer Billing belong to?
Customer Billing sits in the Operations and Execution business area — the operational core that executes payments, positions, settlements and transactions. It runs in the bian-operations namespace as one independent Spring Boot microservice.
Is Customer Billing production-ready?
It is an educational reference implementation: a real BIAN REST API over an in-memory store, ready to be filled with domain logic. It is not a live bank and is not affiliated with BIAN.
SEEIn the landscape
Customer Billing is one of 162 BIAN service domains on the platform. Explore the rest: