hash.wal

{
  "name": "modify",
  "base": "",
  "fields": [
    {
      "name": "product_id",
      "type": "uint64"
    },
    {
      "name": "fee_ratio",
      "type": "uint16"
    },
    {
      "name": "begin_time",
      "type": "uint32"
    }
  ]
}