refactor: Factories: API

[kennylavender]

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Description of Changes

resolves #924

[kennylavender]

Having some issues with the file controller interface, will continue to work on it.

Type '(x?: ReadonlyArray<ReadStream>) => Promise<{}>' is not assignable to type '(fileStreams: ReadonlyArray<ReadStream>) => Promise<ReadonlyArray<{ hash: string; }>>'.
  Type 'Promise<{}>' is not assignable to type 'Promise<ReadonlyArray<{ hash: string; }>>'.
    Type '{}' is missing the following properties from type 'ReadonlyArray<{ hash: string; }>': length, concat, join, slice, and 17 more.ts(2322)
const addFiles: (fileStreams: ReadonlyArray<fs.ReadStream>) => Promise<ReadonlyArray<{
    hash: string;
}>>

[kennylavender]

Ok, think I've got the types figured out. TS was inferring some types incorrectly in handleFile, so I added manual typings. TS was also having issues with ramda's map, and it also had issues with Promise.all.bind(Promise) so I had to adjust those functions those things inside of addFiles

[kennylavender]

For some really weird reason, I have to give this a function like this... It doesn't make any sense. It might have more to do with the asyncPipe weirdness I've been seeing. Il experiment with pipeP