usdecontract

{
  "name": "history_data",
  "base": "",
  "fields": [
    {
      "name": "id",
      "type": "uint64"
    },
    {
      "name": "orderid",
      "type": "uint64"
    },
    {
      "name": "pledge",
      "type": "asset"
    },
    {
      "name": "dollar",
      "type": "asset"
    },
    {
      "name": "status",
      "type": "uint32"
    },
    {
      "name": "type",
      "type": "uint32"
    },
    {
      "name": "time",
      "type": "uint32"
    },
    {
      "name": "describe",
      "type": "string"
    }
  ]
}