Add issues from the Augusto offboarding

[karlb]

[ulope]

Issues / ideas from Augusto offboarding

• Smart Contracts:

  • Use libraries to avoid copying code and allow bigger code size
  • Don't re-deploy secret registry for the same hash type:
    • Would mean multiple SRs need to be watched.
    • Features can be added via wrapper contract

• Client

  • Use cross token payment mechanism to do network upgrades (i.e. some nodes can do payments in both the old and the new networks)
  • Database
    • Use proper database schema instead of storing json blobs
    • Increase Snapshot size to improve performance
  • API
    • Better visibility into state of node
      • Which actions are in progress (syncing, open channel, deposit, close, settle, on-chain tx, etc.)
      • "Where are my funds" during close, settle (i.e. they are no longer visible in the channel but also not yet back on-chain).
    • Make API async
    • Provide Websocket and / or GraphQL API
    • Add some form of "notification" endpoint that returns all the notifications / warnings etc. that currently get printed to stdout:
      • Low UDC balance
      • Low on-chain balance
      • ...
  • State machine
    • Add state change keeping track of which on-chain tx have been sent Fixes (mostly) sending duplicate tx after restart

(This is all from zoom_0.mp4 in https://drive.google.com/drive/u/1/folders/1LhGZ00dLYtnb1zsH4VGgE6hVnvpikjos up until 1:00:00)