Protocol Buffers Version 3 — Investigation

[bennycode]

It looks like we are using Protocol Buffers syntax version 2:

• https://github.com/wireapp/generic-message-proto/blob/master/proto/messages.proto#L1

There is already a Protocol Buffers Version 3 Language Specification, so we might want to update our spec.

@basine, @deanrobertcook & @marcoconti83: Do you see any conflicts in updating to v3?

I guess we might need to change:

// syntax = "proto2";
option java_package = "com.waz.model";

Into:

package com.waz.model;
syntax = "proto3";

[ffflorian]

Interesting read regarding backwards compatibility: https://www.ben-morris.com/handling-protocol-buffers-backwards-compatibility-between-versions-2-and-3-using-c/