【入门夯实】回调金字塔：三层嵌套的可读性救急

local function craftBad(actor)
    actor = getplayerbyname(actor)
    checkBag(actor, function(ok1)
        if not ok1 then return end
        takeItems(actor, function(ok2)
            if not ok2 then return end
            giveReward(actor, function(ok3)
                if not ok3 then return end
                sendmsg(actor, 1, "裁决之杖锻造完成")
            end)
        end)
    end)
end

local function stepCheck(actor, nextFn)
    checkBag(actor, function(ok)
        if not ok then
            sendmsg(actor, 1, "材料校验未通过。")
            return
        end
        nextFn()
    end)
end
local function stepTake(nextFn)
    takeItems(function(ok)
        if not ok then
            return
        end
        nextFn()
    end)
end
local function craftFlat(actor)
    actor = getplayerbyname(actor)
    stepCheck(actor, function()
        stepTake(function()
            giveReward(actor, function()
                sendmsg(actor, 1, "裁决之杖锻造完成。")
            end)
        end)
    end)
end

local function craftSync(actor)
    actor = getplayerbyname(actor)
    if not checkBag(actor) then
        sendmsg(actor, 1, "材料校验未通过。")
        return
    end
    takeItems(actor)
    giveReward(actor)
    sendmsg(actor, 1, "裁决之杖锻造完成。")
end