{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/api-evangelist/lean-tech/main/json-schema/lean-transaction-schema.json",
  "title": "Lean Transaction",
  "description": "A normalized bank transaction returned by the Lean Data API.",
  "type": "object",
  "required": ["id", "amount", "timestamp"],
  "properties": {
    "id": {"type": "string"},
    "account_id": {"type": "string"},
    "amount": {
      "type": "object",
      "required": ["amount", "currency"],
      "properties": {
        "amount": {"type": "number"},
        "currency": {"type": "string", "pattern": "^[A-Z]{3}$"}
      }
    },
    "timestamp": {"type": "string", "format": "date-time"},
    "description": {"type": "string"},
    "credit_debit_indicator": {"type": "string", "enum": ["CREDIT", "DEBIT"]},
    "booking_status": {"type": "string", "enum": ["BOOKED", "PENDING"]},
    "balance_after": {"type": "number"},
    "category": {"type": "string"},
    "merchant": {
      "type": "object",
      "properties": {
        "name": {"type": "string"},
        "category": {"type": "string"}
      }
    }
  }
}