Chrome talks to Play to install WebAPKs.

chrome/browser/android/webapk/webapk.proto

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 syntax = "proto2";
 
 option optimize_for = LITE_RUNTIME;
 
 package webapk;
 
 // Response after creating or updating a WebAPK.
 message WebApkResponse {
   // Package name to install WebAPK at.
   optional string package_name = 1;
 
   // Version code of the WebAPK.
   optional string version = 2;

[pkotwicz, 2016/11/23 03:11:28]

If Chrome wants this to be an int, can we change the proto to expect an int? We
might need the int version to have a different "proto number"

[Xi Han, 2016/11/23 15:43:46]

Talked to Glenn offline, the change would break all the existing installed
WebAPKs, so we have to deprecate this and add a new int "version". I think this
is your suggestion too. It seems the simplest way is to keep this and do the
conversion in Chrome.

[pkotwicz, 2016/11/23 15:56:38]

Fair enough

 
   // URL to download WebAPK.
   optional string signed_download_url = 3;
 
-  reserved 4;
+  // The token to give the Phonesky backend for the rest of the information.

[pkotwicz, 2016/11/23 03:11:28]

How about: "Unique id identifying session with WebAPK server."

Maybe Scott has ideas for naming/documenting the proto member.
I am not a big fan of the "token" name

[Xi Han, 2016/11/23 15:43:45]

Updated.
 
The webapk.proto declared on the server side uses "token", and Play also have
"token" as a key word in the installOptions. Personally, I would prefer to use
"token" to avoid renaming on all these places.

[pkotwicz, 2016/11/23 15:56:38]

Let's rename it in Chrome so that at least Chrome uses a more meaningful name
than "token"

[Xi Han, 2016/11/23 16:44:42]

How about "wam_token" as the one sent to Play?

+  optional string token = 6;
+
+  reserved 4, 5;
 }
 
 // Sent as part of request to create or update a WebAPK.
 message WebApk {
   // Package name of the WebAPK.
   optional string package_name = 1;
 
   // Version code of the WebAPK.
   optional string version = 2;
 
@@ skipping 37 matching lines @@
   // Murmur2 hash of the icon's bytes. There should not be any transformations
   // applied to the icon's bytes prior to taking the Murmur2 hash.
   optional string hash = 5;
 
   // Actual bytes of the image. This image may be re-encoded from the original
   // image and may not match the murmur2 hash field above.
   optional bytes image_data = 6;
 
   reserved 2 to 4;
 }