gotciosource

{
  "name": "modifyextra",
  "base": "",
  "fields": [
    {
      "name": "currency_id",
      "type": "uint64"
    },
    {
      "name": "fiat_symbol",
      "type": "string"
    },
    {
      "name": "buy_rate",
      "type": "uint64"
    },
    {
      "name": "sell_rate",
      "type": "uint64"
    }
  ]
}