我对protobufjs不熟悉。
不清楚您从哪里获取xray，但我使用了Xray-core并将protobuf源代码复制到我的protos目录（如下所示）。
我不得不更改一个Xray-core引用以编译树。
结构：

.
├── foo.json
├── index.js
├── node_modules
├── package.json
├── package-lock.json
├── protos
│   └── xray
│       ├── app
│       ├── common
│       ├── core
│       └── transport
└── README.md

我修改了你的proto，这样我就可以编译它了：foo.proto：

syntax = "proto3";

package xray.app.proxyman;

import "xray/common/net/address.proto";
import "xray/common/net/port.proto";
import "xray/transport/internet/config.proto";
import "xray/common/serial/typed_message.proto";

message ReceiverConfig {
  xray.common.net.PortList port_list = 1;
  xray.common.net.IPOrDomain listen = 2;
//  AllocationStrategy allocation_strategy = 3;
  xray.transport.internet.StreamConfig stream_settings = 4;
  bool receive_original_destination = 5;
  reserved 6;
//  repeated KnownProtocols domain_override = 7 [ deprecated = true ];
  SniffingConfig sniffing_settings = 8;
}
message SniffingConfig {
  // Whether or not to enable content sniffing on an inbound connection.
  bool enabled = 1;

  // Override target destination if sniff'ed protocol is in the given list.
  // Supported values are "http", "tls", "fakedns".
  repeated string destination_override = 2;
  repeated string domains_excluded = 3;

  // Whether should only try to sniff metadata without waiting for client input.
  // Can be used to support SMTP like protocol where server send the first
  // message.
  bool metadata_only = 4;

  bool route_only = 5;
}

1.前缀xray引用，例如xray.common.net.PortList
1.未定义的评论消息，例如AllocationStrategy
我不清楚如何使用protobufjs指定proto_path，所以我编译为JSON模式：

./node_modules/.bin/pbjs \
--path=${PWD}/protos \
${PWD}/protos/xray/app/proxyman/foo.proto \
> foo.json

然后：
index.js：

var protobuf = require("protobufjs");

protobuf.load("foo.json").then((root) => {
  console.log(root);

  const ReceiverConfig = root.lookupType("xray.app.proxyman.ReceiverConfig");

  // By introspecting foo.json schema:
  // 1. portList not port_list
  // 2. From|To initial letter uppercase
  const payload = {
            portList: {
                range: [{
                    From: 1000,
                    To: 1999,
                }],
            },
        };

  const errMsg = ReceiverConfig.verify(payload);
  if (errMsg)
    throw Error(errMsg);

  const message = ReceiverConfig.create(payload);
  console.log(`receiverSetting: ${JSON.stringify(message)}`);

  const buffer = ReceiverConfig.encode(message).finish();

  const decoded = ReceiverConfig.decode(buffer);
  console.log(`receiverSetting: ${JSON.stringify(message)}`);
}).catch((err) => {
  console.log(err);
});

产量：

receiverSetting: {"portList":{"range":[{"From":1000,"To":1999}]}}
receiverSetting: {"portList":{"range":[{"From":1000,"To":1999}]}}