Help removing charges of a ring in a spell

[kimat]

I have a script that u hit more with sd and a ring dissapear, but I want make it that remove 1 charge of the ring, thanks

-- config --
local percent = 50
local ring_id = 2357
-- config --

local combat = createCombatObject()
setCombatParam(combat, COMBAT_PARAM_DISTANCEEFFECT, CONST_ANI_SUDDENDEATH)
 
function Formula(cid)
  local min = (getPlayerLevel(cid) * 2 + getPlayerMagLevel(cid) *3) * 1.3 - 30
  local max = (getPlayerLevel(cid) * 2 + getPlayerMagLevel(cid) *3) * 1.6
  return min, max
end
 
function IncreaseRing(cid,min,max)
  if getPlayerStorageValue(cid,4554) == 1 then
    doPlayerRemoveItem(cid, ring_id, 1)
    return (min / 100) * percent + min,(max / 100) * percent + max
  end
  return min, max
end


function onCast(cid, target)
  local min,max = Formula(cid)
  min,max = IncreaseRing(cid, min, max)

  doTargetCombatHealth(0, target, COMBAT_PHYSICALDAMAGE, -min, -max, CONST_ME_MORTAREA)
end
 
setCombatCallback(combat, CALLBACK_PARAM_TARGETCREATURE, "onCast")
 
function onCastSpell(cid, var)
	return doCombat(cid, combat, var)
end