Lottery pool

Registry: system:lottery_pools. Each confirmation draws one complete prize package; the server samples by integer weight, and the model does not choose the prize.

Field	Type	Required	Default	Description
label	Text component	no	Empty component	Must be non-empty when enabled.
costs	Saturn cost array	no	[]	An empty list means a free draw.
entries	Prize entry array	no	[]	At least one entry when enabled.
enabled	Boolean	no	true	Can be disabled by an override.

Prize entries

Field	Type	Required	Default	Description
reward	Reward snapshot object	yes	—	Contains id, label and items; it is not a string reference to another reward table.
weight	Positive integer	no	1	Probability is this entry's weight / the sum of all weights.
reward.id	Resource ID	yes	—	Identifier of the prize snapshot.
reward.label	Text component	yes	—	Prize name.
reward.items	Item stack template array	yes	—	1–36 items.

Example

data/example/system/lottery_pools/supplies.json

{
  "label": {
    "text": "Daily supplies"
  },
  "costs": [
    {
      "type": "saturn:item",
      "items": [
        "minecraft:emerald"
      ],
      "amount": 2
    }
  ],
  "entries": [
    {
      "weight": 3,
      "reward": {
        "id": "example:food",
        "label": {
          "text": "Rations"
        },
        "items": [
          {
            "id": "minecraft:bread",
            "count": 8
          }
        ]
      }
    },
    {
      "weight": 1,
      "reward": {
        "id": "example:diamond",
        "label": {
          "text": "Diamond"
        },
        "items": [
          {
            "id": "minecraft:diamond"
          }
        ]
      }
    }
  ]
}

The two prizes have probabilities of 75% and 25% respectively. Add them to the values of data/system/tags/system/lottery_pools/default.json, or select them through the pools of the lottery module. Empty costs allow repeated free draws, so design the cost according to your gameplay; the entries and the contents of prize packages are not decided by the client.