JavaScript Bug - deserializeBinary uint64 field to a unsafe int and not correct number

InitConnect.proto の uint64 フィールドから始め、生成された InitConnect_pb.js を Response.deserializeBinary() と toObject() まで追跡します。Number.MAX_SAFE_INTEGER を超える値をどのように表現すべきかを判断し、その後、元の値を変更せずに connID がラウンドトリップすることを確認します。

I use protoc-3.6.0-osx-x86_64 to convert xx.proto to xx_pb.js and npm install google-protobuf(^3.6.0)

InitConnect.proto

syntax = "proto2";
package InitConnect;

import "Common.proto";

message C2S
{
	required int32 clientVer = 1; //客户端版本号，clientVer = "."以前的数 * 100 + "."以后的，举例：1.1版本的clientVer为1 * 100 + 1 = 101，2.21版本为2 * 100 + 21 = 221
	required string clientID = 2; //客户端唯一标识，无生具体生成规则，客户端自己保证唯一性即可
	optional bool recvNotify = 3; //此连接是否接收市场状态、交易需要重新解锁等等事件通知，true代表接收，FutuOpenD就会向此连接推送这些通知，反之false代表不接收不推送
}

message S2C
{
	required int32 serverVer = 1; //FutuOpenD的版本号
	required uint64 loginUserID = 2; //FutuOpenD登陆的牛牛用户ID
	required uint64 connID = 3; //此连接的连接ID，连接的唯一标识
	required string connAESKey = 4; //此连接后续AES加密通信的Key，固定为16字节长字符串
	required int32 keepAliveInterval = 5; //心跳保活间隔
}

message Request
{
	required C2S c2s = 1;
}

message Response
{
	required int32 retType = 1 [default = -400]; //返回结果，参见Common.RetType的枚举定义
	optional string retMsg = 2; //返回结果描述
	optional int32 errCode = 3; //错误码，客户端一般通过retType和retMsg来判断结果和详情，errCode只做日志记录，仅在个别协议失败时对账用
	
	optional S2C s2c = 4;
}

I convert InitConnect.proto to InitConnect_pb.js And Import it to node.js code

const InitConnectMessage = require("InitConnect_pb.js")

//I get PackageBody_Buffer from net, then deserializeBinary

let ResponseBody_Object = InitConnectMessage.Response.deserializeBinary(PackageBody_Buffer);
ResponseBody_Object = ResponseBody_Object.toObject();
console.log(ResponseBody_Object)

The log is :

{ rettype: 0,
  retmsg: '',
  errcode: 0,
  s2c:
   { serverver: 100,
     loginuserid: 2131552,
     connid: 167141872653707230,
     connaeskey: 'D7279ECAA5CF51E8',
     keepaliveinterval: 10 } } 

As the result, the deserialized connid is 167141872653707230, more than js Number.MAX_SAFE_INTEGER// → 9_007_199_254_740_991
Moreover the deserialized connid is not equal to the original connid！