{
  "type": "object",
  "properties": {
    "credit_type": {
      "type": "string",
      "description": "Type of credit ('credit', 'forgiven', 'lost_item_return', 'payment', 'writeoff' )"
    },
    "amount": {
      "type": "number",
      "minimum": 0,
      "description": "Credit amount"
    },
    "library_id": {
      "type": [ "string", "null" ],
      "description": "Internal identifier for the library in which the transaction took place"
    },
    "account_lines_ids": {
        "type": "array",
        "items": {
            "type": "integer"
        },
        "description": "List of account line ids the credit goes against (optional)"
    },
    "payment_type": {
        "type": "string",
        "description":  "Payment type (only applies when credit_type=payment)"
    },
    "date": {
      "type": "string",
      "format": "date",
      "description": "Date the credit was recorded (optional)"
    },
    "description": {
      "type": "string",
      "description": "Description"
    },
    "note": {
      "type": "string",
      "description": "Internal note"
    }
  },
  "required": [ "amount" ]
}