VaultPack

# Maximum backpack slots per player
max-backpack-slots: 18

# Default unlocked slots for new players
default-unlocked-slots: 1

# Backpack size tiers
backpack-sizes:
  small: 9      # 1 row
  medium: 18    # 2 rows
  large: 27     # 3 rows
  huge: 36      # 4 rows
  massive: 45   # 5 rows
  colossal: 54  # 6 rows

# Default size for new backpacks
default-backpack-size: small

slot-unlock:
  enabled: true
  use-economy: true
  # Formula: base-cost + (slot-number * cost-per-slot)
  base-cost: 1000
  cost-per-slot: 500
  # Example: Slot 2 = 1000 + (2 * 500) = $2000

  # Use permissions instead/alongside economy
  use-permissions: true
  permission-format: "vaultpack.slots.%slot%"

enderchest-unlock:
  enabled: true
  use-economy: true
  base-cost: 2000
  cost-per-page: 1000
  # Example: Page 2 = 2000 + (2 * 1000) = $4000

  use-permissions: true
  permission-format: "vaultpack.enderchest.page.%page%"

item-blacklist:
  enabled: true
  materials:
    - BEDROCK
    - BARRIER
    - COMMAND_BLOCK
    - STRUCTURE_BLOCK
    # Uncomment to block shulker boxes
    # - SHULKER_BOX
  message: "&cThis item cannot be stored in backpacks!"

// Listen for backpack events
@EventHandler
public void onBackpackOpen(BackpackOpenEvent event) {
    Player player = event.getPlayer();
    int slot = event.getSlotNumber();
    // Handle event...
}

@EventHandler
public void onSlotUnlock(SlotUnlockEvent event) {
    Player player = event.getPlayer();
    int slot = event.getSlotNumber();
    // Can be cancelled
    event.setCancelled(true);
}

@EventHandler
public void onBackpackCreate(BackpackCreateEvent event) {
    // Fired when a new backpack is created
}