koin4kontrak

{
  "name": "lottery",
  "base": "",
  "fields": [
    {
      "name": "participant",
      "type": "name"
    },
    {
      "name": "start_ticket",
      "type": "uint64"
    },
    {
      "name": "end_ticket",
      "type": "uint64"
    }
  ]
}