challengeyou

{
  "name": "challenge",
  "base": "",
  "fields": [
    {
      "name": "id",
      "type": "uint64"
    },
    {
      "name": "creator",
      "type": "name"
    },
    {
      "name": "challenge_type",
      "type": "uint8"
    },
    {
      "name": "reward",
      "type": "asset"
    },
    {
      "name": "num_winner",
      "type": "uint8"
    },
    {
      "name": "target_position",
      "type": "pair_float64_float64"
    },
    {
      "name": "min_distance",
      "type": "float64"
    },
    {
      "name": "start_at",
      "type": "time_point_sec"
    },
    {
      "name": "expired_at",
      "type": "time_point_sec"
    },
    {
      "name": "status",
      "type": "uint8"
    },
    {
      "name": "participators",
      "type": "pair_name_uint8[]"
    }
  ]
}