【网络通信】跨服玩法：独立集群的会话与结算

---跨服的身份构造：本服 ID 的跨服映射
function CrossServer.enter(actor)
    local player = class(actor)
    if not player then return false end
    -- 跨服身份：服务器前缀加本服 ID
    local crossId = Server.tag() .. ":" .. actor:GetUserId()
    local ticket = CrossServer.issueTicket(actor, crossId)
    if not ticket then
        sendmsg(actor, 1, "跨服队列繁忙，请稍后再试")
        return false
    end
    -- 角色快照带进跨服：等级、装备、技能
    local snapshot = Snapshot.of(actor)
    CrossServer.send(actor, ticket, snapshot)
    sendmsg(actor, 1, "正在进入跨服战场...")
    return true
end

---跨服的结算回传：奖励发回本服
function CrossServer.settle(crossId, result)
    -- 解析跨服身份，找到归属的本服
    local tag, uid = crossId:match("^(%w+):(.+)$")
    local homeServer = Server.homeOf(tag)
    -- 奖励走跨服的可靠投递
    local reward = {
        uid = uid, points = result.score,
        items = result.rewards,
    }
    CrossServer.mailHome(homeServer, reward)
end

---本服的接收：奖励的幂等入账
function CrossServer.receiveHome(reward)
    local key = "cross_" .. reward.uid .. "_" ..
        reward.points .. "_" .. reward.items[1]
    if (getplayvar(reward.uid, 2, key) or "") ~= "" then
        return false   -- 幂等：重复回传不重复发放
    end
    setplayvar(reward.uid, "HUMAN", key, os.time(), 1)
    sendmail(reward.uid, 8011, "跨服战场奖励",
        "战绩 " .. reward.points .. " 分",
        table.concat(reward.items, ","))
    return true
end