Rework transport/bridge to have less duplicated code between send/receive

[Jacalz]

Checklist

• I have searched the issue tracker for open issues that relate to the same feature, before opening a new one.
• This issue only relates to a single feature. I will open new issues for any other features.

Is your feature request related to a problem?

There is a bit of duplicated code between the list data for send and receive in internal/transport/bridge. We should try to improve cohesion by bringing duplicated code to shared functions.

Describe the solution you'd like to see.

Some kind of refactoring to avoid duplicated code. Maybe generics can be useful? I don't know.

[Jacalz]

Will be solved with v4.0.0 rewrite. The packages might even disappear...