Pls add error codes

[code3z]

Instead of or in addition to returning a string when things like user.auth() throw an error, it would be nice to have an error code. I would suggest having two error numbers, one that references the specific code and one that suggests how to handle it (ex: warn user: 1, prompt user to login again: 2, error can usually be ignored: 0). This way I don't have to copy-and-paste english strings that may change into my code.

[draeder]

I agree with this. It's a little unusual to need to hard code error language. That said, it would probably be a lot of work to do.

Either way, I could envision a global event driven error handler module that errors are passed to then emitted back to the developer. This could simplify coding such a change vs using error callbacks or try/catch blocks at every turn. Basically it would do something like:

gun.errors.emit('moduleName', // GUN, SEA, etc. 
  { type: type, // ['error','warning','notice'],  
    code: n, // probably follows HTTP errors
    details: new Error(text), // error constructor
  })

Using the module inside other modules could be pretty simple, basically accepting errors like: gunErrorHandler(moduleName, type, code, new Error(text))

Then developers could subscribe to error events on a per module basis:

gun.errors.on('moduleName', err => {
  // handle errors
})

[code3z]

That said, it would probably be a lot of work to do.

Why? I would imagine that instead of writing return { err: 'Message' } you could write { err: { message: 'message', type: 'warning', code: 1 }

gun.errors.on('moduleName', err => {
  // handle errors
})

An error listener like this could be good for things like displaying notifications to a user when something fails to save, but I think we still need the errors in callback funcs, for things like reacting to invalid password.

Maybe there could be a GunError constructor which takes a code, matches it to text, calls the error handler function(s), returns an Error() with a code property and a log property to log it to the console. I don't think gun.errors needs to differentiate between the modules, since the modules could be differentiated by their error codes (I'm probably not making sense here)

[amark]

@code3z @draeder this is great idea, and would reduce byte size slightly!!!

Tho I don't understand how i18n would work without an endpoint, wouldn't all language variations have to be hardcoded too? Searching for "GUN error 7" 😆 might turn up worse results than English...