API CanGrantLevel

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status = CanGrantLevel("unit")

Arguments

("unit")

unit 

UnitId or a name, returns true if you can grant a level to the target or nil if not

Returns

status 

nil if false, true if you have levels to grant

Example

local status = CanGrantLevel("target")
if status then
 ChatFrame1:AddMessage("I can grant levels to my friend!")
else
 ChatFrame1:AddMessage("I am out of free levels for now.")
end

Result

Outputs in the chat frame either if you can or if you can't grant levels to your target right now.