In future server info will contain multiple endpoints whose string
representation will be worse suited to the cache key.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Includes:
- Delete first `ctx` argument in `Write` method.
- Move intermediate Initial trust struct and method
to `calculator` file.
- Change Alpha to 0.1.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>