[FR] Hot reload coins file

[smk762]

There has been some ongoing discussion regarding the ability for users to update their coins file "on demand" when a newer version is available or when a critical infra update etc would otherwise require a new release of the app(s).

Related: https://github.com/KomodoPlatform/komodo-wallet-desktop/issues/2035

The way the API currently works, app users would need to restart mm2 for any updated coins file to take effect. It would be better UX if an additional rpc like refresh_coin_data was available which could internally update the coins configuration without a restart.

This would also be useful for more quickly testing coins file variations, or being able to load from folder of snippets etc.

Something like

 {
    "mmrpc":"2.0",
    "userpass":"testpsw",
    "method":"refresh_coins_data",
    "params": {
      "path":"/path/to/coins"   # optional, defaults to 'coins' file in mm2 binary folder
    },
    "id":42
  }

One potential cases to consider how to best handle - what happens to coins which are activated but not present in the new file?

Is this rpc doable without disturbing the foundations?

[smk762]

for bonus points, "path" could also be a url. ideally we could have a few coins_configs hosted, and people can use url to get them or path to use a local custom one. Instead of defining electrums etc in activation method params, it uses whats in the active coins file.