{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "LPA",
  "description": "Ledger Posting Authorization for DBIS Rail (lpaId)",
  "type": "object",
  "required": ["lebHash", "state", "stateTimestamp"],
  "properties": {
    "lebHash": { "type": "string", "description": "Hash of canonical LEB (hex)" },
    "state": {
      "type": "string",
      "enum": ["POSTED_FINAL", "POSTED_ADJUSTMENT", "POSTED_REVERSAL", "DISPUTED_HOLD"]
    },
    "stateTimestamp": { "type": "integer", "description": "Unix seconds of state change" }
  },
  "additionalProperties": false
}