README.md

Ledger Writer Service

The ledger writer service accepts and validates incoming transactions before writing them to the ledger.

Implemented in Java with Spring Boot.

Endpoints

Endpoint	Type	Auth?	Description
/ready	GET		Readiness probe endpoint.
/transactions	POST	🔒	Submits a transaction to be appended to the ledger.
/version	GET		Returns the contents of $VERSION

Environment Variables

• VERSION

  • a version string for the service

• PORT

  • the port for the webserver

• JVM_OPTS

  • settings for the JVM. Used to obey container memory limits

• LOG_LEVEL

  • the service-wide log level (default: INFO)

• ConfigMap environment-config:

  • LOCAL_ROUTING_NUM
    • the routing number for our bank
  • PUB_KEY_PATH
    • the path to the JWT signer's public key, mounted as a secret

• ConfigMap service-api-config

  • BALANCES_API_ADDR
    • the address and port of the balancereader service

• ConfigMap ledger-db-config:

  • SPRING_DATASOURCE_URL
    • URL of the ledger-db service
  • SPRING_DATASOURCE_USERNAME
    • username for the ledger-db database
  • SPRING_DATASOURCE_PASSWORD
    • password for the ledger-db database

Kubernetes Resources

• deployments/ledgerwriter
• service/ledgerwriter