{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "#/components/schemas/OrderRequest",
  "title": "OrderRequest",
  "type": "object",
  "required": [
    "fundId",
    "orderType",
    "units"
  ],
  "description": "ETF creation or redemption order request",
  "properties": {
    "fundId": {
      "type": "string",
      "description": "Fund identifier",
      "example": "ETF-SPDR-SPY"
    },
    "orderType": {
      "type": "string",
      "description": "Order type",
      "enum": [
        "CREATION",
        "REDEMPTION"
      ],
      "example": "CREATION"
    },
    "units": {
      "type": "integer",
      "description": "Number of creation/redemption units",
      "minimum": 1,
      "example": 5
    },
    "settlementType": {
      "type": "string",
      "description": "Settlement instruction type",
      "enum": [
        "IN_KIND",
        "CASH"
      ],
      "default": "IN_KIND"
    },
    "clientOrderId": {
      "type": "string",
      "description": "Client-provided reference ID",
      "example": "CLIENT-ORDER-98765"
    }
  }
}