【安全加密】首杀竞拍串通防控：围标抬价的识别与处置设计

local bidPattern = {}
local function recordBid(actor, price, ts)
    local player = class(actor)
    local name = player:GetName()
    bidPattern[name] = bidPattern[name] or {}
    table.insert(bidPattern[name], { p = price, t = ts })
end
local function detectRhythm(name)
    local list = bidPattern[name]
    if list == nil or #list < 3 then return false end
    local gaps = {}
    for i = 2, #list do
        gaps[#gaps + 1] = list[i].t - list[i - 1].t
    end
    local same = 0
    for _, g in ipairs(gaps) do
        if math.abs(g - gaps[1]) < 2 then same = same + 1 end
    end
    return same >= #gaps
end

local function markCollusion(a, b, sameIp, sameGuild)
    local hits = (sameIp and 1 or 0) + (sameGuild and 1 or 0)
    if hits >= 2 then
        setsysvarex("COLLUSION_MARK", a .. "|" .. b, 1)
        return true
    end
    return false
end