c1jk2lc5hgsc

{
  "name": "check",
  "base": "",
  "fields": [
    {
      "name": "from",
      "type": "name"
    },
    {
      "name": "buy_contract",
      "type": "name"
    },
    {
      "name": "old_amount",
      "type": "asset"
    },
    {
      "name": "min_profit",
      "type": "uint64"
    }
  ]
}