Error during user action currently crashes the app

[naleeha]

Bug Report

Steps to Reproduce:

When things error - e.g rpc call, need to capture exception and return useful response rather than crashing the app. Currently this is open for individual VUU app developer and every function to implement

Could we have more centralize solution for error handling - for example have one around every RPC call?

Additional Context:

If we want rpc implementor to customise the error message,, could use something like a result pattern (Either in Scala) which returns a success and error result that are of different types