refactor: improve error handling in bot (#9)

backend/src/bot/handle-error.ts

@@ -1,18 +1,24 @@
 import type { ErrorHandler } from 'grammy'
-import { GrammyError, HttpError } from 'grammy'
+import { BotError, GrammyError, HttpError } from 'grammy'
 import type { Ctx } from './context'
 
 /**
  * @see https://grammy.dev/guide/errors
  */
-export const handleError: ErrorHandler<Ctx> = (error) => {
+export const handleError: ErrorHandler<Ctx> = (e) => {
+  const error = e.error
+  const ctx = e.ctx
   let msg
   if (error instanceof GrammyError) {
     msg = 'Bot API request failed'
   } else if (error instanceof HttpError) {
     msg = 'network error'
-  } else {
+  } else if (error instanceof BotError) {
     msg = 'error in middleware'
   }
-  error.ctx.logger.error({ msg, error })
+  ctx.logger.error({
+    msg: msg,
+    update: ctx.update,
+    error: error,
+  })
 }

backend/src/bot/handlers/root.ts

@@ -23,7 +23,7 @@ export default handler((composer) => {
         ]]),
       })
     } else {
-      throw err
+      throw err.error
     }
   })