ExchangeRate

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "ExchangeRate",
  "type": "object",
  "description": "Currency exchange rate applied to an expense",
  "properties": {
    "value": {
      "type": "number",
      "description": "The exchange rate multiplier or divisor"
    },
    "operation": {
      "type": "string",
      "description": "How to apply the rate to convert currencies"
    }
  }
}