{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "#/components/schemas/MoneyAmount",
  "title": "MoneyAmount",
  "type": "object",
  "description": "A monetary amount with currency.",
  "properties": {
    "quantity": {
      "type": "string",
      "description": "Amount as a string decimal (e.g., \"100.00\")."
    },
    "currency": {
      "type": "string",
      "description": "ISO 4217 currency code.",
      "enum": [
        "ZAR",
        "NGN"
      ]
    }
  }
}