TypeScript Does Not See error.original in Error Handler

[raycharius]

Description

The error that comes through to the global error handler is typed as CodedError, and as such, when trying to reference the original or originals property, TypeScript says that it does not exist.

So far, this is the only thing that has worked:

app.error(async (error) => {
    if (error instanceof UnknownError) {
      // Do something with error.original
    }
  });

While this works, it is very restrictive. If a new type of error were to be introduced into Bolt with an original property, it would not make its way into this block of code.

A much more preferred way would be something like:

if (Boolean(error.original)) {
  // Do something with error.original
}

Or even:

if (error.hasOwnProperty('original')) {
  // Do something with error.original
}

Perhaps it would make sense to add all possible optional properties to the CodedError interface?

What type of issue is this? (place an x in one of the [ ])

• bug
• enhancement (feature request)
• question
• documentation related
• example code related
• testing related
• discussion

Requirements (place an x in each of the [ ])

• I've read and understood the Contributing guidelines and have done my best effort to follow them.
• I've read and agree to the Code of Conduct.
• I've searched for any related issues and avoided creating a duplicate issue.

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[seratch]

@raycharius Thanks a lot for reporting this! We'll look into this and will have a fix in the next minor verison.