Middlewares

nestjs-telega supports telegraf-hardened middleware. Middleware run in this order:

1. middlewaresBefore (or the legacy middlewares alias);
2. scene stage and composer handlers;
3. discovered update handlers;
4. middlewaresAfter.

Use middlewaresBefore for middleware that must prepare context before the handlers, such as session storage:

import { session } from 'telegraf-hardened';

TelegrafModule.forRoot({
  token: process.env.TELEGRAM_BOT_TOKEN!,
  middlewaresBefore: [session()],
});

Use middlewaresAfter for work that must run after discovered handlers. Middleware must call next() when later middleware should receive the update.