# Transferring resources¶

Resource transfer is an important part of many missions in Kerbal Space Program, whether you are gassing up a lander or refuelling a station. Because of this, we need a way to describe a resource transfer in script and monitor that transfer to be sure it was successful.

To accomplish all of this we have two new functions

SET transferFoo TO TRANSFER(resourceName, fromParts, toParts, amount).
SET transferBar TO TRANSFERALL(resourceName, fromParts, toParts).


TRANSFER will move the specified amount of a resource, where TRANSFERALL will move the resource until the source is empty or the destination is full. Both functions return a new ResourceTransfer.

## Resource¶

in all transfers, you must specify a resource by name (eg “oxidizer”, “LIQUIDFUEL”, etc). this term is not case sensitive.

## Source and Destination¶

In all transfers, you must specify a source and a destination, both of these need to be one of these three types:

## Examples¶

Building a list of Element, then transferring all of the oxidizer from one element to another:

LIST ELEMENTS IN elist.
SET foo TO TRANSFERALL("OXIDIZER", elist[0], elist[1]).
SET foo:ACTIVE to TRUE.


Finding two parts by index, then transferring all of the oxidizer from part 1 to part 2:

SET foo TO TRANSFERALL("OXIDIZER", SHIP:PARTS[0], SHIP:PARTS[1]).
SET foo:ACTIVE to TRUE.


Finding two lists of parts by tag, then transferring 100 units of liquidfuel:

SET sourceParts to SHIP:PARTSDUBBED("fooPart").
SET destinationParts to SHIP:PARTSDUBBED("barPart").
SET foo TO TRANSFER("liquidfuel", sourceParts, destinationParts, 100).
SET foo:ACTIVE to TRUE.