{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "type": "object",
  "required": [
    "amount",
    "currency"
  ],
  "properties": {
    "amount": {
      "type": "number",
      "minimum": 0.01
    },
    "currency": {
      "type": "string",
      "minLength": 3
    }
  }
}