On logout happens sometimes that `PeersCount` is called when the server
has been removed.
This commit adds a guard to make sure that the server is not nil when
calling `PeersCount`.
Currently messenger has no notion of being online.
This might cause a problem as we retry to register with a push
notification server even if not connected to any peer, which will
inevitably fail.
This commit adds a method `handleConnectionChange` that will be called
every time the connection change state.
Why make the change?
As discussed previously, the way we will move across versions is to maintain completely separate
codebases and eventually remove those that are not supported anymore.
This has the drawback of some code duplication, but the advantage is that is more
explicit what each version requires, and changes in one version will not
impact the other, so we won't pile up backward compatible code.
This is the same strategy used by `whisper` in go ethereum and is influenced by
https://www.youtube.com/watch?v=oyLBGkS5ICk .
All the code that is used for the networking protocol is now under `v0/`.
Some of the common parts might still be refactored out.
The main namespace `waku` deals with `host`->`waku` interactions (through RPC),
while `v0` deals with `waku`->`remote-waku` interactions.
In order to support `v1`, the namespace `v0` will be copied over, and changed to
support `v1`. Once `v0` will be not used anymore, the whole namespace will be removed.
This PR does not actually implement `v1`, I'd rather get things looked over to
make sure the structure is what we would like before implementing the changes.
What has changed?
- Moved all code for the common parts under `waku/common/` namespace
- Moved code used for bloomfilters in `waku/common/bloomfilter.go`
- Removed all version specific code from `waku/common/const` (`ProtocolVersion`, status-codes etc)
- Added interfaces for `WakuHost` and `Peer` under `waku/common/protocol.go`
Things still to do
Some tests in `waku/` are still testing by stubbing components of a particular version (`v0`).
I started moving those tests to instead of stubbing using the actual component, which increases
the testing surface. Some other tests that can't be easily ported should be likely moved under
`v0` instead. Ideally no version specif code should be exported from a version namespace (for
example the various codes, as those might change across versions). But this will be a work-in-progress.
Some code that will be common in `v0`/`v1` could still be extract to avoid duplication, and duplicated only
when implementations diverge across versions.
This commit pegs the clock value to maximum + 120 seconds from the whisper
timestamp.
In this way the we avoid the scenario where a client makes the timestamp
increase arbitrarely.
Andrea Maria Piana
Adam Babik
Pedro Pombeiro
Pedro Pombeiro
Adam Babik