es6-promise-pool | Runs Promises in a pool | Reactive Programming library

I am building a simple SFTP client with Electron and I am attempting to download or upload multiple files at once using the ssh2 module and the SFTPStream within that module. I have tried many different method structures, some including use of es6-promise-pool. Every attempt I make results in one file from the array of files to transfer being transferred properly and then a subsequent

MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 sftp_message listeners added to [EventEmitter]. Use emitter.setMaxListeners() to increase limit

message is displayed in the console and the rest of the files are not transferred. I am unsure how to change my method structure to prevent this from occurring. I am using ipcRenderer to tell ipcMain to execute the methods I will display here (here is my structure for uploading files for example).

On the app side I am able to query a collection and auto-cast the result as a interface. Positions has a constructer that takes in interface IPosition.

It seems doing the same on cloud functions side doesn't allow the functions to deploy. Its hard to debug the code since it has to be deployed and only works when the code works (local serve requires some permissions).

I was able to narrow it down by removing most of my code and re-adding it line by line until I stumbled on this.

I'm guessing this has to do with the interface having properties that are of type enum. Casting position as IPosition doesn't work either.

Also the interface is imported from another module (parent app module)

I've been looking around for a while now and this is the only resource I've found on the internet related to my problem. I'm trying to download files from one ftp server then upload them to another ftp server, one by one using promises and without having to save the files locally during the process.

First I'm calling client.List() recursively from ftp module to get an array of file paths I'll need to download from the source ftp server. This works fine.

I’m writing definitions for es6-promise-pool to add to DefinitelyTyped, with some tweaks from the discussion at GitHub. The library can take an optional promise parameter that specifies a class to use for the returned promise (e.g. ES6-Promise’s polyfill or Bluebird). Internally, all it cares about is that you can call new Promise(…), so this is enough to specify the type of the value: