Rampant/prototypes/buildings/UpdatesVanilla.lua

local vanillaUpdates = {}

function vanillaUpdates.addWallAcidResistance()
    local walls = data.raw["wall"]

    for _,wall in pairs(walls) do
        local foundAcid = false
        for _,resistance in pairs(wall.resistances) do
            if resistance.type == "acid" then
                if resistance.percent < 60 then
                    resistance.percent = 60
                end
                foundAcid = true
                break
            end
        end
        if not foundAcid then
            wall.resistances[#wall.resistances+1] = {type="acid",percent=60}
        end
    end

    walls = data.raw["gate"]
    for _,wall in pairs(walls) do
        local foundAcid = false
        for _,resistance in pairs(wall.resistances) do
            if resistance.type == "acid" then
                if resistance.percent < 60 then
                    resistance.percent = 60
                end
                foundAcid = true
                break
            end
        end
        if not foundAcid then
            wall.resistances[#wall.resistances+1] = {type="acid",percent=60}
        end
    end
end

return vanillaUpdates