Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
When an opponent activates a card's effect that targets and destroys a Spell or Trap Card(s) you control, you can discard 1 card to negate its activation and destroy the card.
--ネイビィロイド
--Carrierroid
local s,id=GetID()
function s.initial_effect(c)
	--Negate
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_NEGATE+CATEGORY_DESTROY)
	e1:SetType(EFFECT_TYPE_QUICK_O)
	e1:SetCode(EVENT_CHAINING)
	e1:SetProperty(EFFECT_FLAG_DAMAGE_STEP+EFFECT_FLAG_DAMAGE_CAL)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCondition(s.condition)
	e1:SetCost(s.cost)
	e1:SetTarget(s.target)
	e1:SetOperation(s.operation)
	c:RegisterEffect(e1)
end
function s.cfilter(c)
	return c:IsOnField() and c:IsSpellTrap()
end
function s.tgfilter(c,tp)
	return c:IsOnField() and c:IsControler(tp) and c:IsSpellTrap()
end
function s.condition(e,tp,eg,ep,ev,re,r,rp)
	if e:GetHandler():IsStatus(STATUS_BATTLE_DESTROYED) or not Duel.IsChainNegatable(ev) then return false end
	if not re:IsHasProperty(EFFECT_FLAG_CARD_TARGET) then return false end
	local g=Duel.GetChainInfo(ev,CHAININFO_TARGET_CARDS)
	if not g or not g:IsExists(s.tgfilter,1,nil,tp) then return false end
	if re:IsHasCategory(CATEGORY_NEGATE)
		and Duel.GetChainInfo(ev-1,CHAININFO_TRIGGERING_EFFECT):IsHasType(EFFECT_TYPE_ACTIVATE) then return false end
	local ex,tg,tc=Duel.GetOperationInfo(ev,CATEGORY_DESTROY)
	return ex and tg~=nil and tc+tg:FilterCount(s.cfilter,nil)-#tg>0
end
function s.cost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(Card.IsDiscardable,tp,LOCATION_HAND,0,1,nil) end
	Duel.DiscardHand(tp,Card.IsDiscardable,1,1,REASON_COST|REASON_DISCARD)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	Duel.SetOperationInfo(0,CATEGORY_NEGATE,eg,1,0,0)
	if re:GetHandler():IsDestructable() and re:GetHandler():IsRelateToEffect(re) then
		Duel.SetOperationInfo(0,CATEGORY_DESTROY,eg,1,0,0)
	end
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	if Duel.NegateActivation(ev) and re:GetHandler():IsRelateToEffect(re) then
		Duel.Destroy(eg,REASON_EFFECT)
	end
end