What knows a LN intermediate node about a transaction?

[Bitcoin]

What knows a LN intermediate node about a transaction?

Following with How much privacy does Lightning actually have? there is some extra questions I would like to ask.

Suppose that Alice send a LN payment to Bob and the transaction founds a route with three jumps on intermediate nodes C, D and E:

Alice -> C -> D -> E -> Bob

• Can C know that Alice is the original source of the transaction, can he infer that inspecting the package it receives?


• Do D knows about Alice and Bob?


• Can E know that Bob is the final destination?


• Does it depends on some of the channels being private?


• Can a bad actor that controls both C and E knows that the transaction is the same?

Source: What knows a LN intermediate node about a transaction?