play.mars

{
  "name": "swap",
  "base": "",
  "fields": [
    {
      "name": "pool_id",
      "type": "uint64"
    },
    {
      "name": "user_id",
      "type": "uint64"
    },
    {
      "name": "amount_a",
      "type": "asset"
    },
    {
      "name": "min_amount_b",
      "type": "asset"
    }
  ]
}