Protobuf.js: Invalid wire type 7

[andiwonder]

protobuf.js version: 6.8.4

I am trying to decode a buffer and getting the error below

Here is the buffer I saved : https://github.com/andiwonder/dota_gc/blob/master/node-dota2/test.txt

using
fs.writeFileSync(__dirname + "/test.txt", body, "binary");;

The proto I am using is : https://github.com/andiwonder/dota_gc/blob/master/node-dota2/proto/dota_match_metadata.proto

https://github.com/andiwonder/dota_gc/blob/master/node-dota2/scratch.js

var fs = require('fs');
const ProtoBuf = require('protobufjs');
var path = require('path');

var buffer = fs.readFileSync((path.join(__dirname) + '/test2.txt'));
console.log('buffer length is ' + buffer.byteLength);
var builder = ProtoBuf.loadSync(path.join(__dirname) + '/proto/dota_match_metadata.proto');

var decoded_message = builder.CDOTAMatchMetadata.decode(buffer);
var json = decoded_message(JSON.stringify(decoded_message));
console.log(json);

and I am getting the error below :

Can you tell me what is going wrong, is my buffer corrupted or is there something wrong with the proto. Any help is appreciated.

[dcodeIO]

fs.writeFileSync(__dirname + "/test.txt", body, "binary");;

Doesn't that return a binary string instead of a proper buffer? See also: https://github.com/dcodeIO/protobuf.js/wiki/How-to-read-binary-data-in-the-browser-or-under-node.js%3F

[andiwonder]

Well even when I try to decode it directly (without writing/reading from a file) I still get the same error.
The code https://github.com/andiwonder/dota_gc/blob/master/node-dota2/index.js#L165

var builder = Protobuf.loadSync(path.join(__dirname) + '/proto/dota_match_metadata.proto');
var decoded_message = builder.CDOTAMatchMetadata.decode(Buffer.from(body));  
var json = decoded_message(JSON.stringify(decoded_message));  
console.log(json);  

[dcodeIO]

Might also be that the buffer is actually invalid or the .proto definition does not match. You could try to inspect it by hand to get more insights.