How can I add a guard (to spam protection) which will be like Rate Limiting @nestjs/throttler ?

[Rinat85]

Hello everyone!
How can I add a guard from a spam protection which will be like Rate Limiting @nestjs/throttler ?
@nestjs/throttler above the nestjs-telegraf decorators throws me an error.

[Aziz87]

create new guard class

rateLimit.guard.ts

import {CanActivate, ExecutionContext, HttpException,  Injectable} from '@nestjs/common';
import { TelegrafExecutionContext} from 'nestjs-telegraf';
import {Context} from '../../interfaces/context.interface';


@Injectable()
export class RateLimitGuard implements CanActivate {
	private readonly timeout = 1000;
	private timestamps:any = []

	canActivate(context: ExecutionContext): boolean {
		const ctx = TelegrafExecutionContext.create(context);
		const {from} = ctx.getContext<Context>();
		const prevTimestamp = this.timestamps[from.id];
		const timestamp = new Date().getTime();
		if(prevTimestamp && prevTimestamp>timestamp-this.timeout) throw new HttpException('Slowly bro... 😡', 429);
		this.timestamps[from.id]=timestamp;
		return true;
	}
}

And just connect the guard to your bot.update.ts

bot.update.ts

@Update()
// @UseInterceptors(ResponseTimeInterceptor)
// @UseFilters(TelegrafExceptionFilter)
@UseGuards(RateLimitGuard)
export class BotUpdate {
....