Error codes not being propagated to the JS handler

[mendaomn]

Summary

The error rejected by Onfido.start() doesn't include the error code (e.g. cameraPermission)

Description

Regarding the error rejected by Onfido.start(), I see you use the following format:

{
    code: 'error',
    domain: 'Onfido.OnfidoFlowError',
    message: 'Encountered an error: cameraPermission'
}

The issue with this is that, in order to properly handle the permission error, one should parse the error message and find the cameraPermission code.

Possibile solution

Would it be possibile to use it as value of the code property of the error object?

Also, I don't see the possible errors documented anywhere. It may make sense to document those somewhere, if you haven't already!