{
  "$schema": "https://json-schema.org/draft/2020-12",
  "$id": "https://api-evangelist.github.io/rutter/json-schema/rutter-invoice-schema.json",
  "title": "Rutter Invoice",
  "description": "An invoice from a connected accounting platform via the Rutter Unified API",
  "type": "object",
  "properties": {
    "id": {
      "type": "string",
      "description": "Unique identifier for the invoice"
    },
    "customer_id": {
      "type": "string",
      "description": "The ID of the customer this invoice belongs to"
    },
    "status": {
      "type": "string",
      "enum": ["draft", "open", "paid", "voided"],
      "description": "Current invoice status"
    },
    "amount_due": {
      "type": "number",
      "format": "double",
      "description": "Total amount due on the invoice"
    },
    "currency": {
      "type": "string",
      "description": "ISO 4217 currency code",
      "examples": ["USD", "EUR", "GBP"]
    },
    "due_date": {
      "type": "string",
      "format": "date",
      "description": "Date the invoice is due"
    },
    "line_items": {
      "type": "array",
      "items": {
        "$ref": "#/$defs/LineItem"
      },
      "description": "Line items on the invoice"
    }
  },
  "required": ["id", "status"],
  "$defs": {
    "LineItem": {
      "type": "object",
      "properties": {
        "description": {
          "type": "string"
        },
        "quantity": {
          "type": "number"
        },
        "unit_price": {
          "type": "number",
          "format": "double"
        },
        "total_amount": {
          "type": "number",
          "format": "double"
        }
      }
    }
  }
}