FFI AutoBuy

local ffi = require("ffi")
    function vmt_entry(instance, index, type)
        return ffi.cast(type, (ffi.cast("void***", instance)[0])[index])
    end

    function vmt_thunk(index, typestring)
        local t = ffi.typeof(typestring)
        return function(instance, ...)
            assert(instance ~= nil)
            if instance then
                return vmt_entry(instance, index, t)(instance, ...)
            end
        end
    end

    function vmt_bind(module, interface, index, typestring)
        local instance = client.create_interface(module, interface) or error("invalid interface")
        local fnptr = vmt_entry(instance, index, ffi.typeof(typestring)) or error("invalid vtable")
        return function(...)
            return fnptr(instance, ...)
        end
    end

    native_GetNetChannelInfo = vmt_bind("engine.dll", "VEngineClient014", 78, "void*(__thiscall*)(void*)")
    local native_GetName = vmt_thunk(0, "const char*(__thiscall*)(void*)")
    local native_GetAddress = vmt_thunk(1, "const char*(__thiscall*)(void*)")
    native_IsLoopback = vmt_thunk(6, "bool(__thiscall*)(void*)")
    local native_IsTimingOut = vmt_thunk(7, "bool(__thiscall*)(void*)")
    native_GetAvgLoss = vmt_thunk(11, "float(__thiscall*)(void*, int)")
    native_GetAvgChoke = vmt_thunk(12, "float(__thiscall*)(void*, int)")
    native_GetTimeSinceLastReceived = vmt_thunk(22, "float(__thiscall*)(void*)")
    local native_GetRemoteFramerate = vmt_thunk(25, "void(__thiscall*)(void*, float*, float*, float*)")
    local native_GetTimeoutSeconds = vmt_thunk(26, "float(__thiscall*)(void*)")

    local pflFrameTime = ffi.new("float[1]")
    local pflFrameTimeStdDeviation = ffi.new("float[1]")
    local pflFrameStartTimeStdDeviation = ffi.new("float[1]")

    function GetRemoteFramerate(netchannelinfo)
        native_GetRemoteFramerate(netchannelinfo, pflFrameTime, pflFrameTimeStdDeviation, pflFrameStartTimeStdDeviation)
        if pflFrameTime ~= nil and pflFrameTimeStdDeviation ~= nil and pflFrameStartTimeStdDeviation ~= nil then
            return pflFrameTime[0], pflFrameTimeStdDeviation[0], pflFrameStartTimeStdDeviation[0]
        end
    end

    function GetAddress(netchannelinfo)
        local addr = native_GetAddress(netchannelinfo)
        if addr ~= nil then
            return ffi.string(addr)
        end
    end

    function GetName(netchannelinfo)
        local name = native_GetName(netchannelinfo)
        if name ~= nil then
            return ffi.string(name)
        end
    end