finalized/content-addressed streams

[dvc94ch]

this gives us similar properties to arbitrary sized content addressed blocks

[rklaehn]

So this would be that you have a stream that you don't want to write to anymore. It is addressed not by the stream id but by the root hash, and you can get slices of it?

[dvc94ch]

still need to work out the details, I think #7 is the next challenge. but yes, something like that.