Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
When an opponent's monster declares an attack: Destroy it, then inflict 300 damage to your opponent.
--毒サソリの罠毒
--Trap of the Poisonous Scorpion
--scripted by Naim
local s,id=GetID()
function s.initial_effect(c)
	--Destroy an opponent's attacking monster, then inflict 300 damage to your opponent
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_DESTROY+CATEGORY_DAMAGE)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_ATTACK_ANNOUNCE)
	e1:SetCondition(function(e,tp) return Duel.GetAttacker():IsControler(1-tp) end)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	local bc=Duel.GetAttacker()
	e:SetLabelObject(bc)
	bc:CreateEffectRelation(e)
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,bc,1,tp,0)
	Duel.SetOperationInfo(0,CATEGORY_DAMAGE,nil,0,1-tp,300)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	local bc=e:GetLabelObject()
	if bc:IsRelateToEffect(e) and bc:IsMonster() and Duel.Destroy(bc,REASON_EFFECT)>0 then
		Duel.BreakEffect()
		Duel.Damage(1-tp,300,REASON_EFFECT)
	end
end