Maintenance script: UI Lua API import (WAR 1.4.8)

2026-10-16T19:51:02Z

UI Lua API import (WAR 1.4.8)

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{{LuaApi|group=Item}}
Asks the server to move an item out of the backpack it is in, without choosing a destination slot.

<pre>
TransferBetweenBackpacks(slot, backpackType)
</pre>

== Arguments ==
;slot : <code>number</code> – Slot of the item inside the backpack, starting at 1.
;backpackType : <code>number</code> – Which backpack the item is in, as an <code>EA_Window_Backpack.TYPE_*</code> value: 2 (<code>TYPE_INVENTORY</code>), 3 (<code>TYPE_CURRENCY</code>) or 4 (<code>TYPE_CRAFTING</code>).

== Returns ==
Nothing.

== Details ==
* The client sends a move request for the item with a fixed special destination instead of a slot. Where the item ends up is decided by the server.
* <code>slot</code> is truncated to its low byte (0–255). For <code>backpackType</code> 2, 3 and 4 it is converted to an absolute inventory slot; for any other value it is used without conversion.
* The client does not check that the slot holds an item.
* The stock backpack window calls it for crafting and currency items, passing the backpack currently shown.
* The function needs at least two arguments and only reads the last two.

== Errors ==
None besides the generic ''Invalid Parameters'' message when an argument is not a number.

== Example ==
From <code>default/ea_backpackwindow/source/backpackutils.lua</code>:
<pre>
elseif ( isTradeSkillItem or isCurrencyItem )
then
TransferBetweenBackpacks( slot, EA_Window_Backpack.currentMode )
</pre>

== See also ==
* [[API:RequestMoveItem|RequestMoveItem]]
* [[API:GetCraftingItemData|GetCraftingItemData]]
* [[API:GetCurrencyItemData|GetCurrencyItemData]]

API:TransferBetweenBackpacks - Revision history

Maintenance script: UI Lua API import (WAR 1.4.8)