Selectable Choices for customer

{
  "type": "array",
  "items": {
    "type": "object",
    "properties": {
      "balance": {
        "type": "integer",
        "description": "Sum owned - sum due by account"
      },
      "haben": {
        "type": "integer",
        "description": "Sum owned by account"
      },
      "soll": {
        "type": "integer",
        "description": "Sum due by account"
      },
      "txs": {
        "type": "array",
        "items": {
          "type": "object",
          "properties": {
            "cashier": {
              "type": "string",
              "description": "Pretty print of counter signing party"
            },
            "timeStamp": {
              "type": "integer",
              "description": "Cross signed timestamp of transaction"
            },
            "txid": {
              "type": "string",
              "description": "Unique hash of this transaction as provided by counter signing party"
            },
            "txtype": {
              "type": "string",
              "description": "Type of transaction per cashier implementation and schema"
            },
            "value": {
              "type": "integer",
              "description": "Amount covered by transaction"
            }
          }
        }
      },
      "variation": {
        "type": "string",
        "description": "Type of subbalance (sub account)",
        "enum": [
          "gsb",
          "erzeugung",
          "eigenstrom",
          "co2",
          "baeume"
        ]
      }
    }
  }
}