Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Equip only to a Fairy monster. It gains 500 ATK. If it inflicts battle damage to your opponent: Gain LP equal to the damage inflicted.
--ダグラの剣
--Cestus of Dagla
local s,id=GetID()
function s.initial_effect(c)
	aux.AddEquipProcedure(c,nil,aux.FilterBoolFunction(Card.IsRace,RACE_FAIRY))
	--recover
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_F)
	e2:SetCategory(CATEGORY_RECOVER)
	e2:SetDescription(aux.Stringid(id,0))
	e2:SetCode(EVENT_BATTLE_DAMAGE)
	e2:SetRange(LOCATION_SZONE)
	e2:SetCondition(s.reccon)
	e2:SetTarget(s.rectg)
	e2:SetOperation(s.recop)
	c:RegisterEffect(e2)
	--Atk up
	local e4=Effect.CreateEffect(c)
	e4:SetType(EFFECT_TYPE_EQUIP)
	e4:SetCode(EFFECT_UPDATE_ATTACK)
	e4:SetValue(500)
	c:RegisterEffect(e4)
end
function s.reccon(e,tp,eg,ep,ev,re,r,rp)
	local ec=e:GetHandler():GetEquipTarget()
	return ec and eg:IsContains(ec) and ep~=tp
end
function s.rectg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	Duel.SetTargetPlayer(tp)
	Duel.SetTargetParam(ev)
	Duel.SetOperationInfo(0,CATEGORY_RECOVER,0,0,tp,ev)
end
function s.recop(e,tp,eg,ep,ev,re,r,rp)
	local p,d=Duel.GetChainInfo(0,CHAININFO_TARGET_PLAYER,CHAININFO_TARGET_PARAM)
	Duel.Recover(p,d,REASON_EFFECT)
end